BACKGROUND OF THE INVENTION

[0001] The embodiments as disclosed herein relate to a landing gear assembly for heavy- duty commercial trucks such as semi-trailers, and specifically to a landing leg assembly that includes a gear arrangement operable to move the landing gear assembly between a retracted position and an extended position, and where the gear arrangement includes various configurations of bolt-on bushing arrangements.

SUMMARY OF THE INVENTION

[0002] One embodiment as shown and described herein includes a landing gear assembly configured to support a trailer where the landing gear assembly may include a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member, and a first bushing member rotatably supporting a first end of the first shaft member within the first leg member, wherein the first bushing member is attached to the first leg member via at least one first mechanical fastener, and wherein the first bushing member comprises a powdered metal.

[0003] Another embodiment as shown and described herein may further or alternatively include a landing gear assembly configured to support a trailer where the landing gear assembly may include a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member, and a first bushing member directly supporting a first end of the first shaft member for rotational movement within the first leg member, wherein the first bushing member is attached to the first leg member via at least one first mechanical fastener, and wherein the first bushing member is a single, integral piece. [0004] Yet another embodiment as shown and described herein may further or alternatively include a landing gear assembly configured to support a trailer where the landing gear assembly may include a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member, a first bushing member having a bushing portion and a plate portion rotatably supporting a first end of the first shaft member within the first leg member, wherein the first flanged cap bushing member is attached to the first leg member via at least one first mechanical fastener, and wherein the first flanged cap bushing member is a single, integral piece, and a second flanged cap bushing member rotatably supporting a second end of the first shaft member within the first leg member, wherein the second flanged cap bushing member is attached to the first leg member via at least one second mechanical fastener, and wherein the second flanged cap bushing member is a single, integral piece.

[0005] Still yet another embodiment as shown and described herein may further or alternatively include a landing gear assembly configured to support a trailer where the landing gear assembly may include a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member, a first bushing member directly supporting a first end of the first shaft member for rotational movement within the first leg member, wherein the first bushing member is attached to the first leg member via at least one first mechanical fastener, and a second bushing member directly supporting a second end of the first shaft member for rotational movement within the first leg member, wherein the second bushing member is attached to the first leg member via at least one second mechanical fastener.

[0006] Another embodiment as shown and described herein may alternatively or further include a landing gear assembly configured to support a trailer where the landing gear assembly may include a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member having a first longitudinal axis and second shaft member having a second longitudinal axis offset from the first longitudinal axis, and a single-piece bushing plate having a first bushing portion directly supporting the first shaft member for rotational movement within the first leg member and a second bushing portion directly supporting the second shaft member for rotational movement within the first leg member, wherein the bushing plate is attached to the first leg member via at least one mechanical fastener.

[0007] Yet another embodiment as shown and described herein may alternatively or further include a landing gear assembly configured to support a trailer where the landing gear assembly includes a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member and a first gear where the first shaft member and the first gear are a single, integral piece, a first bushing member including a bushing portion having a bushing portion and a closed end and rotatably supporting a first end of the first shaft member within the first leg member, and a second bushing member including a bushing portion having a bushing portion and a closed end and rotatably supporting a second end of the first shaft member within the first leg member.

[0008] Still yet another embodiment as shown and described herein may alternatively or further include a method of assembling a landing gear assembly configured to support a trailer where the landing gear assembly includes providing a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, the first leg member having an open end, a first aperture extending through a first sidewall and a second aperture extending through a second sidewall, providing a gear assembly that includes a first shaft member and a first gear where the first shaft member and the first gear are a single, integral piece, wherein the gear assembly is configured to move the second leg member between the retracted and extended positions, positioning the first shaft member and first gear within the first leg member by passing the first shaft member and first gear through the open end of the first leg member, extending a first end of the first shaft member through the first aperture and extending a second end of the first shaft member through the second aperture and providing a bushing member that includes a bushing portion having a closed end and a plate portion extending outwardly from the bushing portion. The method may further include attaching the first bushing member to the first wall of the first leg member such that the first bushing member rotatably supports the first end of the first shaft member, providing a second bushing member that includes a bushing portion having a closed end and a plate portion extending outwardly from the bushing portion, and attaching the second bushing member to the second wall of the first leg member such that the second bushing member rotatably supports the second end of the first shaft member.

[0009] Another embodiment as shown and described herein may alternatively or further include a landing gear assembly configured to support a trailer where the landing gear assembly includes a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, the first leg member having a first aperture extending through a first sidewall and a second aperture extending through a second sidewall, and a gear assembly including an input shaft extending through the first aperture and a drive gear fixed to the input gear, an output shaft extending through the second aperture and a output gear fixed to the output shaft, where the output gear includes a slot and the input shaft and the output shaft are configured to telescopingly engage one another, a first locking pin extending through the output shaft and received within the slot of the output gear thereby fixing the output gear to the output shaft, and a second locking pin extending though the output shaft at a position outside of the first leg member where the first and second locking pins cooperate to prevent removal of the output shaft from the second aperture. [0010] Still yet another embodiment as shown and described herein may alternatively or further include a method of assembling a landing gear assembly configured to support a trailer where the landing gear assembly includes providing a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, the first leg member having a first aperture extending through a first sidewall and a second aperture extending through a second sidewall, providing a gear assembly including an input shaft and a drive gear fixed for rotation with the input gear, an output shaft, an output gear having a slot, a first locking pin, and a second locking pin, providing a first bushing member, and providing a second bushing member. The method may further include attaching the second bushing member to the second sidewall, positioning the output gear within an interior of the first leg member, extending the output gear through the second bushing member, the second aperture and the output gear, inserting the first locking pin into a first aperture in the output shaft, engaging the first locking pin with the slot of the output shaft thereby fixing the output gear with the output shaft, inserting the second locking pin into a second aperture of the output shaft thereby preventing the output shaft from being removed from within the second bushing member, extending the input shaft through the first bushing member, extending the input shaft and the first bushing member through the first aperture such that the input and output shafts engage one another, and attaching the first bushing member to the first wall.

[0011] These and other features, advantages, and objects of the present invention will be further understood and appreciated by those skilled in the art by reference to the following specification, claims, and appended drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Fig. 1 is a side elevation view of a vehicle combination;

[0013] Fig. 2 is a perspective view of a landing gear assembly;

[0014] Fig. 3 is a first perspective view of a first embodiment of a gear assembly;

[0015] Fig. 4 is a second perspective view of the first embodiment of the gear assembly;

[0016] Fig. 5 is a cross-sectional side elevation view of the first embodiment of the gear assembly; [0017] Fig. 6 is a first perspective view of a second embodiment of the gear assembly;

[0018] Fig. 7 is a second perspective view of the second embodiment of the gear assembly;

[0019] Fig. 8 is a cross-sectional side elevation view of the second embodiment of the gear assembly;

[0020] Fig. 9 is a first perspective view of a third embodiment of the gear assembly;

[0021] Fig. 10 is a second perspective view of the third embodiment of the gear assembly;

[0022] Fig. 11 is a cross-sectional side elevation view of the third embodiment of the gear assembly;

[0023] Fig. 12 is a perspective view of a fourth embodiment of the landing gear assembly;

[0024] Fig. 13 is a cross-sectional side elevation view of a fifth embodiment of the gear assembly;

[0025] Fig. 14 is a first perspective view of the fifth embodiment of the gear assembly;

[0026] Fig. 15 is a second perspective view of the fifth embodiment of the gear assembly;

[0027] Fig. 16A is a perspective view of an input and output assembly of the fifth embodiment of the gear assembly;

[0028] Fig. 16B is an exploded view of the input and output shaft assembly of Fig. 16A;

[0029] Fig. 17 is a cross-sectional view of a sixth embodiment of the gear assembly;

[0030] Fig. 18 is a first perspective view of the sixth embodiment of the gear assembly;

[0031] Fig. 19 is a second perspective view of the sixth embodiment of the gear assembly;

[0032] Fig. 20A is a perspective view of an input and output shaft assembly of the sixth embodiment of the gear assembly;

[0033] Fig. 20B is an exploded perspective view of the input and output shaft assembly of Fig. 20A;

[0034] Fig. 21 is a perspective view of an additional alternative embodiment of the landing gear assembly;

[0035] Fig. 22 is a cross-sectional side elevation view of a gear assembly of the embodiment of the landing gear shown in Fig. 21; and [0036] Fig. 23 is a perspective view of the gear assembly of Fig. 22.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] For purposes of description herein, the terms "upper," "lower," "right," "left," "rear," "front," "vertical," "horizontal," and derivatives thereof shall relate to the invention as oriented in FIGs. 1 and 2. However, it is to be understood that the invention may assume various alternative orientations, except where expressly specified to the contrary. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.

[0038] A vehicle combination 10 (Fig. 1) includes a towing vehicle shown as a tractor or semi-truck 12 and a towed vehicle shown as a heavy-duty commercial trailer or semi-trailer 14. In the illustrated example, the semi-trailer 14 includes a trailer body 16 supported at one end by a suspension assembly 18, and at an opposite end by the truck 12. The trailer 14 further includes landing gear assemblies or landing leg assemblies 20 movable between a raised position A where the landing gear assembly 20 is spaced from a supporting ground surface 22, and a lowered or extended position B where the landing leg assembly 20 abuts the ground surface 22 and supports the forward end of the trailer 14, thereby allowing the truck 12 to be uncoupled from and removed from beneath the trailer 14. Although only a single landing gear assembly 20 is illustrated in Fig. 1, it is noted that the trailer 14 is supported by two separate landing leg assemblies 20 located on opposite sides of the trailer 20 from one another.

[0039] The landing leg assembly 20 (Fig. 2) includes a lower leg member or housing 24 telescopingly received within an upper leg member or housing 26, a foot member 28 (Fig. 1) affixed to a distal end of the lower leg member 24, wherein the foot member 28 is configured to abut the ground surface 22 when the landing leg assembly 20 is in the extended position B, and a mounting plate 30 fixedly secured to an outer surface of the upper leg member 26 and configured to secure the landing leg assembly 20 to a frame member 34 of the trailer 14 via a plurality of mechanical fasteners (not shown) that are received within apertures 36 of the mounting plate 30. The lower leg member 24, the upper leg member 26 and the mounting plate 30 each comprise a metal. A cover cooperates with the upper leg member 26 to define an interior space 39.

[0040] The landing leg assembly 20 further includes a gear assembly 38 (Figs. 3-5) configured to receive an input from an operator to drive the landing leg assembly 20 between the retracted and extended positions A, B. In the illustrated example, a manual input from an operator via a handle or crank assembly (not shown) or a powered mechanical input from an electric or hydraulic motor and the like may be utilized. The gear assembly 38 may include an input shaft 40 configured to receive the manual or powered mechanical input, and a spur input gear 42 having a first portion 44 and a second portion 46 where the second portion 46 has a diameter that is less than the diameter of the first portion 44. The gear assembly 38 further includes an idler shaft 48 having a longitudinally extending axis 49 that is offset from a longitudinally extending axis 51 of the input shaft 40, a spur first idler gear 50 fixed to the idler shaft 48 and configured to be selectively engaged by the spur input gear 42 as described below, and a spur second idler gear 52 that is integral with the idler shaft 48. The gear assembly 38 further includes an output shaft 54 configured to couple the landing leg assembly 20 located on a first side of the semi-trailer 14 with an opposite landing leg assembly (not shown) located on an opposite side of the semi-trailer 14 in a manner as known in the art. The gear assembly 38 further includes an output gear member 56 having a first spur gear portion 58 engaged by the spur second idler gear 52, and a beveled gear portion 60 as further described below, a locking-pin receiving slot 62, and a second spur gear portion 64 configured to selectively receive the spur input gear 42 therein, as described below. The beveled gear portion 60 of the output gear member 56 engages and drives an output beveled gear 66 fixed to an end of a jack shaft or drive shaft 67 via a pin 68. A drive nut 70 is threadably received on the threaded jack shaft 67 and is secured to an interior of the lower leg member 24 such that movement of the drive nut 70 along the length of the jack shaft 67 telescopingly moves the lower leg member 24 with respect to the upper leg member 26 between the retracted and extended positions A, B.

[0041] The input shaft 40 is rotationally supported from the upper leg member 26 by a bushing arrangement 72 that includes a bushing portion 74 and a lip or plate portion 76 that extends outwardly from the bushing portion 74, where the plate portion 76 is secured to an outer surface 78 of a sidewall 80 of the upper leg member 26 via a plurality of mechanical fasteners such as bolts 82. In the illustrated example, the bushing portion 74 and the plate portion 76 of the bushing arrangement 72 form a single, integral piece, where the bushing arrangement 72 comprises a sintered metal, such as iron nickel, and directly supports the input shaft 40 without the use of a separate bushing sleeve. An O- ring type seal member 84 is positioned between the bushing portion 74 of the bushing arrangement 72 and the input shaft 40. In assembly, as further described below, the bushing portion 74 of the bushing arrangement 72 and the input shaft 40 extend through an aperture 81 extending through the sidewall 80.

[0042] A bushing arrangement 86 supports the output shaft 54 for rotation within the upper leg member 26 and includes a bushing portion 88 and a plate portion 90, where the plate portion 90 is secured to an inner surface 92 of a sidewall 94 of the upper leg member 26. In assembly, as further described below, the bushing portion 88 of the bushing arrangement 86 and the output shaft 54 extend through an aperture 96 that extends through the sidewall 94, where the plate portion 90 of the bushing arrangement 86 is secured to the inner surface 92 of the sidewall 94 by a plurality of mechanical fasteners such as bolts 98. The bushing member portion 88 and the plate portion 90 form a single, integral piece, where the bushing arrangement comprises a sintered metal, such as iron nickel, and directly supports the output shaft 54 without use of a separate bushing sleeve.

[0043] The idler shaft 48 is supported by a pair of bushing arrangements 100 located at and supporting opposite ends of the idler shaft 48. In the illustrated example, each bushing arrangement 100 includes a bushing portion 102 having a closed end 104, and a plate portion or flange 106, where the bushing portion 102 and the plate portion 106 form a single, integral piece. In the illustrated example, the bushing portion 102 of each bushing arrangement 100 and the associated end of the idler shaft 48 extend through a respective aperture 108, 109 extending through the associated sidewalls 80, 94 of the upper leg member 26. The plate portion 106 of each bushing arrangement 100 is secured to an outer surface of the upper leg member 26 by a plurality of mechanical fasteners such as bolts 110, although other suitable fasteners may also be utilized including, but not limited to, rivets, screws, anchors, and the like. In the illustrated example, the bushing portion 102 of each of the bushing arrangements 100 comprises a sintered metal and directly supports the associated end of the idler shaft 48 without the use of a separate bushing sleeve.

[0044] In assembly, the bushing arrangement 86 is secured to the inner surface 92 of the sidewall 94 of the upper leg member 26 by the plurality of bolts 98. The output gear member 56 is then inserted into the interior 39 of the upper leg member 26 via an open end of the upper leg member 26 when the cover 32 is removed therefrom. The output gear member 56 is located proximate the bushing arrangement 86 and the output shaft 54 is extended through the bushing arrangement 86, the aperture 96 and the output gear member 56. A locking pin 112 is then press-fit into a locking pin aperture 114 of the output shaft 54, and the output shaft 54 withdrawn until the locking pin 112 is received within the locking pin receiving slot 62 of the output gear member 56 thereby rotationally locking the output gear member 56 with the output shaft 54. A locking pin 116 is then press-fit into a locking pin aperture 118 of the output shaft 54 that is located on an exterior of the upper leg member 26 such that the locking pins 112, 116 prevent the removal of the output shaft 54. The input shaft 40 is then inserted into the bushing arrangement 72, and the bushing portion 74 of the bushing arrangement 72 and the input shaft 40 inserted through the aperture 81, and the bushing arrangement 72 is secured to the sidewall 80 via bolts 82. In the illustrated example, an end bore 120 of the input shaft 40 rotationally receives an engagement portion 122 of the output shaft 54.

[0045] In operation, the landing leg assembly 20 is operable between a high gear, low torque configuration where the second portion 46 of the spur input gear 42 engages the second spur gear portion 64 of the output gear member 56 and the second portion 46 of the spur input gear 42 does not engage the first idler gear 50, and a low gear, high torque configuration where the input shaft 40 is moved in a linear direction 124 until the first portion 44 of the spur input gear 42 engages the first idler gear 50 and the second portion 46 of the spur input gear 42 is withdrawn from and does not engage the second spur gear portion 64 of the output gear member 56.

[0046] The reference numeral 38a (Figs. 6-8) generally designates another embodiment of the gear assembly. Since the gear assembly 38a is similar to the previously described gear assembly 38, similar parts appearing in Figs. 3-5 and Figs. 6-8 respectively are represented by the same, corresponding reference numerals, except for the suffix "a" in the numerals of the latter. The gear arrangement 38a is similar to the previously described gear arrangement 38 with the most notable exception being the configuration of the idler shaft and idler gears. In the illustrated example, the gear assembly 38a includes an idler shaft 48a, a first idler gear 50a and a second idler gear 52a that are integrally formed in a single piece with one another. In assembly, the idler shaft 48a is moved into the interior space 39a of the upper leg member 26a via the open end thereof, and a first end 124 of the idler shaft 48a is extended through the aperture 108a of the upper leg member 26a. The opposite second end 126 of the idler shaft 48a is then lowered into position and the idler shaft 48a moved in a direction 128 until the second end of the idler shaft 48a extends through the opposite aperture 109d. The bushings 100a are then secured in place in a similar manner to the bushings 100 as described above.

[0047] The reference numeral 38b (Figs. 9-11) generally designates another embodiment of the gear assembly. Since the gear assembly 38b is similar to the previously described gear assembly for 38a, similar parts appearing in Figs. 6-8 and Figs. 9-11 respectively are represented by the same, corresponding reference numeral, except for the suffix "b" in the numerals of the latter. The gear assembly 38b is similar to the gear assembly 38a with the most notable exceptions being the configuration of the idler shaft and bearing members. In the illustrated example, the idler shaft 48b includes a first outer tube portion 130 that is integrally formed with the first idler gear 50b and the second idler gear 52b and includes an inner passage 132, and an inner shaft portion 134 that is received within the inner passage 132 of the outer tube portion 130 and includes first and second ends 136, 138 that extend outwardly from associated ends of the outer tube portion 130. Each end 136, 138 is supported by an associated bearing arrangement 140. Each bearing arrangement 140 includes a bearing housing 141 that includes a body portion 142 and a lip portion 144 extending outwardly therefrom, and a bearing sleeve 146 received within the body portion 142 of the bearing housing 141. An O-ring type seal 148 is positioned between the associated end 136, 138 of the inner shaft 134 and the bearing housing 141 of the associated bearing arrangement 140. It is noted that in the illustrated example, the output shaft 54b is rotationally supported within the upper leg member 26b by a bearing arrangement 150 that is similar in construction to the bearing arrangements 140.

[0048] In assembly, the bearing arrangements 140 are secured to the upper leg member 26b by a weld extending about the body portion 142 of each bearing arrangement 140, thereby attaching the bearing arrangements 140 to the upper leg member 26b. The outer tube portion 130 is then positioned within the interior 39b of the upper leg member 26 by passing the outer tube portion 130 through an open end of the upper leg member 26b, and the inner passage 132 is aligned with the apertures 108b of the upper leg member 26b. The inner shaft 134 is then extended into the inner passage 132 of the outer tube portion 130. A locking pin 152 is then press-fit into an aperture 154 of the outer tube portion 130 and an aperture 156 of the inner shaft 134, thereby connecting the inner shaft 134 with the outer tube portion 130.

[0049] The reference numeral 20c (Fig. 12) generally designates another embodiment of the landing gear assembly. Since the landing gear assembly 20c is similar to the landing gear assembly 20, similar parts appearing in Figs. 1-5 and Fig. 12 respectively are represented by the same, corresponding reference numeral, except for the suffix "c" in the numerals of the latter. The landing gear assembly 20c is similar to the previously described landing gear assembly 20, with the most notable exception being the replacement of the bushing arrangement 72 and the bushing arrangement 100 of the landing gear assembly 20 with a combined bushing arrangement 158. In the illustrated example, the combined bushing arrangement 158 includes an upper bushing arrangement 160 that is similar in configuration as the previously described bushing arrangement 100 and a lower bushing arrangement 162 that is similar in configuration as the previously described bushing arrangement 72. In the illustrated example, the upper bushing arrangement 160 and the lower bushing arrangement 162 are coupled via a bushing or mounting plate 164 that extends outwardly from the bushing portion 102c and the bushing portion 88c of the lower bushing arrangement 162 such that the bushing portion 102c, the bushing portion 88c and the bushing plate 164 are integrally formed with one another. [0050] The reference numeral 38d (Figs. 13-15) generally designates another embodiment of the gear assembly. Since the gear assembly 38d is similar to the previously described gear assembly 38, similar parts appearing in Figs. 13-15 and Figs. 2-5 respectively are represented by the same, corresponding reference numerals, except for the suffix "d" in the numerals of the latter. In the illustrated example, the gear assembly 38d includes an idler shaft 48d, a first idler gear 50d and a second idler gear 52d that are integrally formed in a single piece with one another. In assembly, the idler shaft 48d is moved into the interior space 39d of the upper leg member 26d via the open end thereof, and a first end 124d of the idler shaft 48d is extended through the aperture 108d of the upper leg member 26d. The opposite second end 126d of the idler shaft 48d is then lowered into position and the idler shaft 48d moved in a direction 128d until the second end 126d of the idler shaft 48d extends through the opposite aperture 109d. The bushings lOOd are then secured in place in a similar manner to the bushings 100 as described above. It is noted that in the illustrated example, the bushings lOOd are secured via rivets 111.

[0051] As further shown in Figs. 13-16B and in assembly, the bushing arrangement 86d is secured to the inner surface 92d of the sidewall 94d of the upper leg member 26d by the plurality of rivets 113. The output gear member 56d is then inserted into the interior 39d of the upper leg member 26d via an open end of the upper leg member 26d when the cover 32d is removed therefrom. The output gear member 56d is located proximate the bushing arrangement 86d and the output shaft 54d is extended through the bushing arrangement 86d, the aperture 96d and the output gear member 56d. A locking pin 112d is then press-fit into a locking pin aperture 114d of the output shaft 54d, and the output shaft 54d withdrawn until the locking pin 112d is received within a locking pin receiving slot 62d of the output gear member 56d thereby rotationally locking the output gear member 56d with the output shaft 54d. A locking pin 116d is then press-fit into a locking pin aperture 118d of the output shaft 54d that is located on an exterior of the upper leg member 26d such that the locking pins 112d, 116d prevent the removal of the output shaft 54d. The input shaft 40d is then inserted into the bushing arrangement 72d, and the bushing portion 74d of the bushing arrangement 72d and the input shaft 40d inserted through the aperture 81d. The bushing arrangement 72d is then secured to the sidewall 80d via bolts 82d. In the illustrated example, an end bore 120d of the input shaft 40d rotationally receives an engagement portion 122d of the output shaft 54d.

[0052] In operation, the landing leg assembly 20d is operable between a high gear, low torque configuration where a plurality of reliefs 150 opening from an end of the input shaft 40d selectively engage an engagement pin 152 received in and extending through an engagement pin aperture 154 of the output shaft 54d , and a second portion 44d of the spur input gear 42d does not engage the first idler gear 50d, and a low gear, high torque configuration where the input shaft 40d is moved in a linear direction 124d until the first portion 44d of the spur input gear 42d engages the first idler gear 50d and the input shaft 40d is withdrawn from engagement with the engagement pin 152.

[0053] The reference numeral 38e (Figs. 17-19) generally designates another embodiment of the gear assembly. Since the gear assembly 38e is similar to the previously described gear assembly 38d, similar parts appearing in Figs. 13-16b and Figs. 17-19 respectively are represented by the same, corresponding reference numerals, except for the suffix "e" in the numerals of the latter. The gear arrangement 38e is similar to the previously described gear arrangement 38d with the most notable exception being the configuration of the input and output shafts.

[0054] The bushing arrangement 86e (Figs. 17-20b) is secured to the inner surface 92e of the sidewall 94e of the upper leg member 26e by the plurality of bolts 98e. The output gear member 56e is then inserted into the interior 39e of the upper leg member 26e via an open end of the upper leg member 26e when the cover 32e is removed therefrom. The output gear member 56e is located proximate the bushing arrangement 86e and the output shaft 54e is slid through the aperture 81e, the output gear 56e, the aperture 86e and the output gear member 56e until first splines 160 integral with the output shaft 54e engage second splines 162 integral with the output gear member 56e, thereby rotationally locking the output gear 56e with the output shaft 54e. A locking pin 116e is then press-fit into a locking pin aperture 118e of the output shaft 54e that is located on an exterior of the upper leg member 26e such that the output gear member 56e and the locking pin 116e prevent the removal of the output shaft 54e. The input shaft 40e is then inserted into the bushing arrangement 72e, and the bushing portion 74e of the bushing arrangement 72e and the input shaft 40e inserted through the aperture 81e, and the bushing arrangement 72e is secured to the sidewall 80e via bolts 82e. In the illustrated example, an end bore 120e of the input shaft 40e rotationally receives an engagement portion 122e of the output shaft 54e. It is noted that the configuration of the output shaft 54e in the instant embodiment allows the output shaft 54e to be cold forged thereby increasing the relative strength of the output shaft 54e.

[0055] In operation, the landing leg assembly 20e is operable between a high gear, low torque configuration where a third spline 164 of the input shaft 40e engages a fourth spline 166 of the out shaft 54e and the second portion 44e of the spur input gear 42e does not engage the first idler gear 50e, and a low gear, high torque configuration wherein the input shaft 40e is moved in a linear direction 124e until the first portion 44e of the spur input gear 42e engages the first idler gear 50e and the third spline 164 is withdrawn from engagement with the fourth spline 166.

[0056] The reference numeral 20f (Figs. 21-23) generally designates another embodiment of the landing gear assembly. Since the landing gear assembly 20f is similar to the landing gear assembly 20, similar parts appearing in Figs. 1-5 and Figs. 21-23 respectively are represented by the same, corresponding reference numeral, except for the suffix "f" in the numerals of the latter. In the illustrated example, the landing gear assembly 20f includes a single-speed gear arrangement 200 including an input shaft 202 supported within the interior space 39f of the upper leg member 26f by a first bushing assembly 204 and a second bushing assembly 206 each secured to the upper leg member 26f by associated rivets 208 within respective apertures 210, 212. In assembly, the bushing assembly 204 is secured within the aperture 210 and the bushing 206 within the aperture 212 via the rivets 208. The input shaft 40f is then extended through the bushing 206, and a locking pin 214 is inserted into a locking pin aperture 216 of the input shaft 40f. The input shaft 40f is then further extended through the bushing 206 until the input shaft extends through the bushing 204 and the locking pin 214 is received within a mating slot 215 of a beveled output gear member 220, where the beveled output gear member 220 is configured to drive the output beveled gear 66f. An engagement pin 222 is then inserted into an engagement pin aperture 224, such that the locking pin 214 and the engagement pin 222 prevent removal of the input shaft 40f. [0057] A first aspect as disclosed herein includes a landing gear assembly configured to support a trailer, comprising a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member, and a first bushing member rotatably supporting a first end of the first shaft member within the first leg member, wherein the first bushing member is attached to the first leg member via at least one first mechanical fastener, and wherein the first bushing member comprises a powdered metal.

[0058] A second aspect as disclosed herein may include the first aspect, wherein the first bushing member is a single, integral piece.

[0059] A third aspect as disclosed herein may include one or more of the first and second aspects, wherein the first bushing member includes a bushing portion having a closed end and a plate portion extending outwardly from the bushing portion.

[0060] A fourth aspect as disclosed herein may include one or more of the first through third aspects, wherein the bushing portion of the first bushing member directly supports the first end of the first shaft member.

[0061] A fifth aspect as disclosed herein may include one or more of the first through fourth aspects, wherein the first bushing member is attached to an outer surface of the first leg member.

[0062] A sixth aspect as disclosed herein may include one or more of the first through fifth aspects, wherein the at least one first mechanical fastener includes at least one bolt.

[0063] A seventh aspect as disclosed herein may include one or more of the first through sixth aspects, further comprising a second bushing member rotatably supporting a second end of the first shaft member within the first leg member, wherein the second bushing member is attached to the first leg member via at least one second mechanical fastener, and wherein the second bushing member comprises a powdered metal.

[0064] An eighth aspect as disclosed herein may include one or more of the first through seventh aspects, wherein the second bushing member is a single, integral piece. [0065] A ninth aspect as disclosed herein may include one or more of the first through eighth aspects, wherein the first and second bushing members each include a bushing portion having a closed end and a plate portion extending outwardly from the bushing portion.

[0066] A tenth aspect as disclosed herein may include one or more of the first through ninth aspects, wherein the bushing portion of the second bushing member directly supports the second end of the first shaft member.

[0067] An eleventh aspect as disclosed herein may include one or more of the first through tenth aspects, wherein the plate portion of the second bushing member is attached to an outer surface of the first leg member.

[0068] A twelfth aspect as disclosed herein may include one or more of the first through eleventh aspects, further comprising a second bushing member rotatably supporting a second shaft member of the gear assembly within the first leg member where a longitudinal axis of the second shaft is offset from a longitudinal axis of the first shaft member, wherein the first and second bushing members are integral with one another.

[0069] A thirteenth aspect as disclosed herein may include one or more of the first through twelfth aspects, and a landing gear assembly comprising a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member, and a first bushing member directly supporting a first end of the first shaft member for rotational movement within the first leg member, wherein the first bushing member is attached to the first leg member via at least one first mechanical fastener, and wherein the first bushing member is a single, integral piece.

[0070] A fourteenth aspect as disclosed herein may include one or more of the first through thirteenth aspects, wherein the first bushing member comprises a powdered metal.

[0071] A fifteenth aspect as disclosed herein may include one or more of the first through fourteenth aspects, wherein the first bushing member includes a bushing portion having a closed end and a plate portion extending outwardly from the bushing portion.

[0072] A sixteenth aspect as disclosed herein may include one or more of the first through fifteenth aspects, wherein the plate portion of the first bushing member is attached to an outer surface of the first leg member.

[0073] A seventeenth aspect as disclosed herein may include one or more of the first through sixteenth aspects, wherein the at least one first mechanical fastener includes at least one bolt.

[0074] An eighteenth aspect as disclosed herein may include one or more of the first through seventeenth aspects, and further comprise a second bushing member directly supporting a second end of the first shaft member for rotational movement within the first leg member, wherein the second bushing member is attached to the first leg member via at least one second mechanical fastener.

[0075] A nineteenth aspect as disclosed herein may include one or more of the first through eighteenth aspects, wherein the second bushing member comprises a powdered metal.

[0076] A twentieth aspect as disclosed herein may include one or more of the first through nineteenth aspects, wherein the first and second bushing members each include a bearing portion having a closed end and a plate portion extending outwardly from the bearing portion.

[0077] A twenty-first aspect as disclosed herein may include one or more of the first through twentieth aspects, wherein the plate portion of the second bushing member is attached to an outer surface of the first leg member.

[0078] A twenty-second aspect as disclosed herein may include one or more of the first through twenty-first aspects, and further comprise a second bushing member rotatably supporting a second shaft member of the gear assembly within the first leg member where a longitudinal axis of the second shaft member is offset from a longitudinal axis of the first shaft member, wherein the first and second bushing members are integral with one another.

[0079] A twenty-third aspect as disclosed herein may include one or more of the first through twenty-second aspects, and a landing gear assembly comprising a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member, a first bushing member having a bushing portion and a plate portion rotatably supporting a first end of the first shaft member within the first leg member, wherein the first flanged cap bushing member is attached to first leg member via at least one first mechanical fastener, and wherein the first flanged cap bushing member is a single, integral piece, and a second flanged cap bushing member rotatably supporting a second end of the first shaft member within the first leg member, wherein the second flanged cap bushing member is attached to the first leg member via at least one second mechanical fastener, and wherein the second flanged cap bushing member is a single, integral piece.

[0080] A twenty-fourth aspect as disclosed herein may include one or more of the first through twenty-third aspects, wherein the first flanged cap bushing member comprises a powdered metal.

[0081] A twenty-fifth aspect as disclosed herein may include one or more of the first through twenty-fourth aspects, wherein the first flanged cap bushing member directly supports the first end of the first shaft member.

[0082] A twenty-sixth aspect as disclosed herein may include one or more of the first through twenty-fifth aspects, wherein the second flanged cap bushing member directly supports the second end of the first shaft member.

[0083] A twenty-seventh aspect as disclosed herein may include one or more of the first through twenty-sixth aspects, wherein the first flanged cap bushing member is attached to an outer surface of the first leg member.

[0084] A twenty-eighth aspect as disclosed herein may include one or more of the first through twenty-seventh aspects, wherein the second flanged cap bushing member is attached to an outer surface of the first leg member.

[0085] A twenty-ninth aspect as disclosed herein may include one or more of the first through twenty-eighth aspects, wherein the at least one first mechanical fastener includes at least one first bolt. [0086] A thirtieth aspect as disclosed herein may include one or more of the first through twenty-ninth aspects, wherein the at least one second mechanical fastener includes at least one second bolt.

[0087] A thirty-first aspect as disclosed herein may include one or more of the first through thirtieth aspects, and further comprise a third bushing member rotatably supporting a second shaft member of the gear assembly within the first leg member where a longitudinal axis of the second shaft member is offset from a longitudinal axis of the first shaft member, wherein the first and third bushing members are integral with one another.

[0088] A thirty-second aspect as disclosed herein may include one or more of the first through thirty-first aspects, and a landing gear assembly comprising a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member, a first bushing member directly supporting a first end of the first shaft member for rotational movement within the first leg member, wherein the first bushing member is attached to the first leg member via at least one first mechanical fastener, and a second bushing member directly supporting a second end of the first shaft member for rotational movement within the first leg member, wherein the second bushing member is attached to first leg member via at least one second mechanical fastener.

[0089] A thirty-third aspect as disclosed herein may include one or more of the first through thirty-second aspects, wherein the first bushing member comprises powdered metal.

[0090] A thirty-fourth aspect as disclosed herein may include one or more of the first through thirty-third aspects, wherein the second bushing member comprises powdered metal.

[0091] A thirty-fifth aspect as disclosed herein may include one or more of the first through thirty-fourth aspects, wherein the first bushing member includes a bearing portion having a closed end and a plate portion extending outwardly from the bearing portion.

[0092] A thirty-sixth aspect as disclosed herein may include one or more of the first through thirty-fifth aspects, wherein the second bushing member includes a bearing portion having a closed end and a plate portion extending outwardly from the bearing portion.

[0093] A thirty-seventh aspect as disclosed herein may include one or more of the first through thirty-sixth aspects, wherein the first bushing member is a single, integral piece.

[0094] A thirty-eighth aspect as disclosed herein may include one or more of the first through thirty-seventh aspects, wherein the first bushing member is a single, integral piece.

[0095] A thirty-ninth aspect as disclosed herein may include one or more of the first through thirty-eighth aspects, wherein the first bushing member is attached to an outer surface of the first leg member.

[0096] A fortieth aspect as disclosed herein may include one or more of the first through thirty-ninth aspects, wherein the at least one first mechanical fastener includes at least one bolt.

[0097] A forty-first aspect as disclosed herein may include one or more of the first through fortieth aspects, wherein the second bushing member is attached to an outer surface of the first leg member.

[0098] . A forty-second aspect as disclosed herein may include one or more of the first through forty-first aspects, wherein the at least one second mechanical fastener includes at least one bolt.

[0099] A forty-third aspect as disclosed herein may include one or more of the first through forty-second aspects, and a landing gear assembly comprising a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member having a first longitudinal axis and a second shaft member having a second longitudinal axis offset from the first longitudinal axis, and a single-piece bushing plate having a first bushing portion directly supporting the first shaft member for rotational movement within the first leg member and a second bushing portion directly supporting the second shaft member for rotational movement within the first leg member, wherein the bushing plate is attached to the first leg member via at least one mechanical fastener.

[00100] A forty-fourth aspect as disclosed herein may include one or more of the first through forty-third aspects, wherein the single-piece bushing plate comprises powdered metal.

[00101] A forty-fifth aspect as disclosed herein may include one or more of the first through forty-fourth aspects, wherein the single-piece bushing plate includes a first bearing portion having a closed end and supporting the first shaft, a second bearing portion supporting the second shaft, and a plate portion extending between the first and second bearing portions.

[00102] A forty-sixth aspect as disclosed herein may include one or more of the first through forty-fifth aspects, wherein the single-piece bushing plate is attached to an outer surface of the first leg member.

[00103] A forty-seventh aspect as disclosed herein may include one or more of the first through forty-sixth aspects, wherein the at least one mechanical fastener includes at least one bolt.

[00104] A forty-eighth aspect as disclosed herein may include one or more of the first through forty-ninth aspects, and further comprise a bushing member rotatably supporting a second end of the first shaft member within the first leg member, wherein the second bushing member is attached to the first leg member via at least one second mechanical fastener.

[00105] A forty-ninth aspect as disclosed herein may include one or more of the first through forty-eighth aspects, wherein the first bearing portion and the bushing member each include a closed end.

[00106] A fiftieth aspect as disclosed herein may include one or more of the first through forty-ninth aspects, and a landing gear assembly comprising a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position a gear assembly operably coupled to the leg assembly and configured to move the first leg member between the retracted and extended positions, wherein the gear assembly includes a first shaft member and a first gear where the first shaft member and the first gear are a single, integral piece, a first bushing member including a bushing portion having a bushing portion and a closed end and rotatably supporting a first end of the first shaft member within the first leg member, and a second bushing member including a bushing portion having a bushing portion and a closed end and rotatably supporting a second end of the first shaft member within the first leg member.

[00107] A fifty-first aspect as disclosed herein may include one or more of the first through fiftieth aspects, wherein the first bushing member is attached to the first leg member via at least one first mechanical fastener.

[00108] A fifty-second aspect as disclosed herein may include one or more of the first through fifty-first aspects, wherein the at least first mechanical fastener includes at least one bolt.

[00109] A fifty-third aspect as disclosed herein may include one or more of the first through fifty-second aspects, wherein the first bushing member is attached to an outer surface of the first leg member.

[00110] A fifty-fourth aspect as disclosed herein may include one or more of the first through fifty-third aspects, wherein the second bushing member is attached to the first leg member via at least one second mechanical fastener.

[00111] A fifty-fifth aspect as disclosed herein may include one or more of the first through fifty-fourth aspects, wherein the first bushing member is a single, integral piece.

[00112] A fifty-sixth aspect as disclosed herein may include one or more of the first through fifty-fifth aspects, wherein the first bushing member directly supports the first end of the first shaft member.

[00113] A fifty-seventh aspect as disclosed herein may include one or more of the first through fifty-sixth aspects, wherein the second bushing member is a single, integral piece.

[00114] A fifty-eighth aspect as disclosed herein may include one or more of the first through fifty-seventh aspects, wherein the gear assembly further includes a second gear, where the first shaft member and the second gear are a single, integral piece. [00115] A fifty-ninth aspect as disclosed herein may include one or more of the first through fifty-eighth aspects, and method of assembling a landing gear assembly comprising providing a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, the first leg member having an open end, a first aperture extending through a first sidewall and a second aperture extending through a second sidewall, providing a gear assembly that includes a first shaft member and a first gear where the first shaft member and the first gear are a single, integral piece, wherein the gear assembly is configured to move the second leg member between the retracted and extended positions, positioning the first shaft member and first gear within the first leg member by passing the first shaft member and first gear through the open end of the first leg member, extending a first end of the first shaft member through the first aperture and extending a second end of the first shaft member through the second aperture, providing a bushing member that includes a bushing portion having a closed end and a plate portion extending outwardly from the bushing portion, attaching the first bushing member to the first wall of the first leg member such that the first bushing member rotatably supports the first end of the first shaft member, providing a second bushing member that includes a bushing portion having a closed end and a plate portion extending outwardly from the bushing portion, and attaching the second bushing member to the second wall of the first leg member such that the second bushing member rotatably supports the second end of the first shaft member.

[00116] A sixtieth aspect as disclosed herein may include one or more of the first through fifty-ninth aspects, wherein the first bushing member is attached to the first leg member via at least one first mechanical fastener.

[00117] A sixty-first aspect as disclosed herein may include one or more of the first through sixtieth aspects, wherein the at least first mechanical fastener includes at least one bolt.

[00118] A sixty-second aspect as disclosed herein may include one or more of the first through sixty-first aspects, wherein the first bushing member is attached to an outer surface of the first sidewall. [00119] A sixty-third aspect as disclosed herein may include one or more of the first through sixty-second aspects, wherein the second bushing member is attached to the first leg member via at least one second mechanical fastener.

[00120] A sixty-fourth aspect as disclosed herein may include one or more of the first through sixty-third aspects, wherein the first bushing member is a single, integral piece.

[00121] A sixty-fifth aspect as disclosed herein may include one or more of the first through sixty-fourth aspects, wherein the first bushing member directly supports the first end of the first shaft member.

[00122] A sixty-sixth aspect as disclosed herein may include one or more of the first through sixty-fifth aspects, wherein the gear assembly further includes a second gear, where the first shaft member and the second gear are a single, integral piece.

[00123] A sixty-seventh aspect as disclosed herein may include one or more of the first through sixty-sixth aspects, and a landing gear assembly comprising a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, the first leg member having a first aperture extending through a first sidewall and a second aperture extending through a second sidewall, and a gear assembly including an input shaft extending through the first aperture and a drive gear fixed to the input gear, an output shaft extending through the second aperture and an output gear fixed to the output shaft, where the output gear includes a slot and the input shaft and the output shaft are configured to telescopingly engage one another, a first locking pin extending through the output shaft and received within the slot of the output gear thereby fixing the output gear to the output shaft, and a second locking pin extending though the output shaft at a position offset from the first locking pin where the first and second locking pins cooperate to prevent removal of the output shaft from the second aperture.

[00124] A sixty-eighth aspect as disclosed herein may include one or more of the first through sixty-seventh aspects, where the gear assembly further includes an idler shaft, a first idler gear fixed to the idler shaft, and a second idler shaft fixed to the idler shaft and engaged with the output gear, wherein the input shaft is longitudinally moveable between a first position where the input gear engages the first idler gear and a second position where the input gear is disengaged from the first idler gear. [00125] A sixty-ninth aspect as disclosed herein may include one or more of the first through sixty-eighth aspects, and further comprise a bushing member rotatably supporting the input shaft member within the first leg member, wherein the bushing member is attached to the first leg member via at least one mechanical fastener.

[00126] A seventieth aspect as disclosed herein may include one or more of the first through sixty-ninth aspects, wherein the bushing member is a single, integral piece.

[00127] A seventy-first aspect as disclosed herein may include one or more of the first through seventieth aspects, wherein the bushing member comprises a powdered metal.

[00128] A seventy-second aspect as disclosed herein may include one or more of the first through seventy-first aspects, wherein the bushing member directly supports the drive shaft member.

[00129] A seventy-third aspect as disclosed herein may include one or more of the first through seventy-second aspects, wherein the bushing member is attached to an outer surface of the first wall.

[00130] A seventy-fourth aspect as disclosed herein may include one or more of the first through seventy-third aspects, wherein the at least one mechanical fastener includes at least one bolt.

[00131] A seventy-fifth aspect as disclosed herein may include one or more of the first through seventy-fourth aspects, and further comprise a bushing member rotatably supporting the output shaft member within the first leg member, wherein the bushing member is attached to the first leg member via at least one mechanical fastener.

[00132] A seventy-sixth aspect as disclosed herein may include one or more of the first through seventy-fifth aspects, wherein the bushing member is a single, integral piece.

[00133] A seventy-seventh aspect as disclosed herein may include one or more of the first through seventy-sixth aspects, wherein the bushing member comprises a powdered metal.

[00134] A seventy-eighth aspect as disclosed herein may include one or more of the first through seventy-seventh aspects, wherein the bushing member directly supports the output shaft member. [00135] A seventy-ninth aspect as disclosed herein may include one or more of the first through seventy-eighth aspects, wherein the bushing member is attached to an inner surface of the second wall.

[00136] An eightieth aspect as disclosed herein may include one or more of the first through seventy-ninth aspects, wherein the at least one mechanical fastener includes at least one bolt.

[00137] An eighty-first aspect as disclosed herein may include one or more of the first through eightieth aspects, and further comprise a first bushing member rotatably supporting the input shaft member within the first leg member, wherein the first bushing member is attached to the first leg member via at least one first mechanical fastener, and a second bushing member rotatably supporting the output shaft member within the first leg member, wherein the second bushing member is attached to the first leg member via at least one second mechanical fastener.

[00138] An eighty-second aspect as disclosed herein may include one or more of the first through eighty-first aspects, wherein the position at which the second locking pin extends through the output shaft is located outside of the first leg member.

[00139] An eighty-third aspect as disclosed herein may include one or more of the first through eighty-second aspects, and a method of assembling a landing gear assembly comprising providing a leg assembly including a first leg member and a second leg member telescopingly received within the first leg member and adjustable between a retracted position and an extended position, the first leg member having a first aperture extending through a first sidewall and a second aperture extending through a second sidewall, providing a gear assembly including an input shaft and a drive gear fixed for rotation with the input gear, an output shaft, an output gear having a slot, a first locking pin, and a second locking pin, providing a first bushing member, providing a second bushing member, attaching the second bushing member to the second sidewall, positioning the output gear within an interior of the first leg member, extending the output gear through the second bushing member, the second aperture and the output gear, inserting the first locking pin into a first aperture in the output shaft, engaging the first locking pin with the slot of the output shaft thereby fixing the output gear with the output shaft, inserting the second locking pin into a second aperture of the output shaft thereby preventing the output shaft from being removed from within the second bushing member, extending the input shaft through the first bushing member, extending the input shaft and the first bushing member through the first aperture such that the input and output shafts engage one another, and attaching the first bushing member to the first wall.

[00140] An eighty-fourth aspect as disclosed herein may include one or more of the first through eighty-third aspects, where the gear assembly further includes an idler shaft, a first idler gear fixed for rotation with the idler shaft, and a second idler shaft fixed for rotation with the idler shaft and engaged with the output gear, wherein the input shaft is longitudinally moveable between a first position where the input gear engages the first idler gear and second position where the input gear is disengaged from the first idler gear.

[00141] An eighty-fifth aspect as disclosed herein may include one or more of the first through eighty-fourth aspects, wherein the first bushing member is attached to the first leg member via at least one first mechanical fastener.

[00142] An eighty-sixth aspect as disclosed herein may include one or more of the first through eighty-fifth aspects, wherein the at least one first mechanical fastener includes at least one bolt.

[00143] An eighty-seventh aspect as disclosed herein may include one or more of the first through eighty-sixth aspects, wherein the first bushing member is a single, integral piece.

[00144] An eighty-eighth aspect as disclosed herein may include one or more of the first through eighty-seventh aspects, wherein the first bushing member comprises a powdered metal.

[00145] An eighty-ninth aspect as disclosed herein may include one or more of the first through eighty-eighth aspects, wherein the first bushing member directly supports the drive shaft member.

[00146] A ninetieth aspect as disclosed herein may include one or more of the first through eighty-ninth aspects, wherein the first bushing member is attached to an outer surface of the first wall. [00147] A ninety-first aspect as disclosed herein may include one or more of the first through ninetieth aspects, wherein the second bushing member is a single, integral piece.

[00148] A ninety-second aspect as disclosed herein may include one or more of the first through ninety-first aspects, wherein the second bushing member comprises a powdered metal.

[00149] A ninety-third aspect as disclosed herein may include one or more of the first through ninety-second aspects, wherein the second bushing member directly supports the output shaft member.

[00150] A ninety-fourth aspect as disclosed herein may include one or more of the first through ninety-third aspects, wherein the second bushing member is attached to an inner surface of the second wall.

[00151] A ninety-fifth aspect as disclosed herein may include one or more of the first through ninety-fourth aspects, wherein the second bushing member is attached to the first leg member via at least one mechanical fastener.

[00152] A ninety-sixth aspect as disclosed herein may include one or more of the first through ninety-fifth aspects, wherein the at least one mechanical fastener includes at least one bolt.

[00153] A ninety-seventh aspect as disclosed herein may include one or more of the first through ninety-sixth aspects, wherein the input shaft and the output shaft telescopingly engage one another.

[00154] A ninety-eighth aspect as disclosed herein may include one or more of the first through ninety-seventh aspects, where the second aperture of the output shaft is located outside of the first leg member.

[00155] In the foregoing description, it will be readily appreciated by those skilled in the art that modifications may be made to the embodiments as disclosed herein without departing from the concepts as disclosed herein. Such modifications are to be considered as included in the following claims, unless these claims by their language expressly state otherwise.