Technical Field

The present invention relates to a stabilizing device for work vehicles, i.e., for land vehicles on which any work member is mounted, such as e.g. a crane, excavator boom or the like, protruding cantilevered from the profile of the vehicle and capable of rotating around the same to carry out work in its surroundings. Background Art

This type of work members, during their operation, drastically change the center of gravity of the work vehicle and therefore have certain restrictions, e.g. in terms of maximum load and outreach, to allow them to be used safely, e.g. avoiding the risk of the vehicle tipping over.

In fact, the resting base provided by the vehicle alone is very small and significantly reduces the performance of the work member and the application ranges of the work vehicle.

Therefore, it is well known to employ stabilizing devices to increase the resting base of the vehicle onto the ground in order to improve the performance of the work vehicle and enable it to operate safely.

Generally, the stabilizing devices of known type make use of stabilizing arms which, during operation of the work member, are extended mechanically cantilevered from the body of the vehicle and arranged to rest on the ground.

This expedient makes it possible to widen the resting base of the work member, so as to increase the maximum load and outreach of the same member and to reduce the risk of vehicle tipping over.

During the movement of the work vehicle, on the other hand, the stabilizing arms are mechanically retracted to the body of the vehicle itself, so as to reduce the overall dimensions thereof and allow them to be moved safely on the road.

These characteristics make this type of work vehicles very versatile and functional for a wide variety of application fields.

However, the stabilizing devices of known type do have some drawbacks.

In particular, the stabilizing devices of known type are generally installed on or associated with the platform of the work member and result in significant overall dimensions on the vehicle bedplate, i.e., on the frame generally arranged to the rear of the vehicle driver’ s cab and on which the work member is mounted.

This drawback prevents such a bedplate from being used for other purposes, e.g. to attach the vehicle to a trailer or semi-trailer.

To overcome this problem, some work vehicles mount on the bedplate a stabilizing device provided with a counter-frame which houses the stabilizing arms inside and on top of which mechanical fastening means are mounted.

In this way, a possible trailer or semi-trailer is attached to the fastening means, on top of the counter-frame.

However, this solution greatly complicates the use of the work vehicle for towing trailers or semi-trailers.

In fact, the counter-frame inevitably increases the height of the fastening means and prevents the use of common trailers or semi-trailers. Therefore, this solution forces the user of the work vehicle to use special, suitably modified trailers or semi-trailers which are less practical, uncommon and more expensive than those commonly used.

Another well-known solution is to attach the stabilizing device directly to the fastening means. However, it is apparent that this solution has the same limitations as the previous one and inevitably prevents the use of the fastening means for other purposes.

An additional drawback related to the bedplate overall dimensions is to limit the number of stabilizing arms which can be mounted on the work vehicle.

In fact, the stabilizing devices of known type only employ, at most, two pairs of arms extending, opposite each other, substantially orthogonal to the direction of movement of the vehicle and each starting from a corresponding sidewall.

However, this solution maximizes the performance of the work member at the sidewalls of the vehicle to the detriment of a significant reduction in performance at other areas of the vehicle, e.g., at the rear area, where the maximum load and outreach of the work member is greatly reduced.

This drawback makes the use of the work member difficult and inconvenient, particularly in the case where the latter works 360° around the work vehicle. For example, the user of the work member who has to move the same member from the right sidewall to the left sidewall of the vehicle has to reduce the overhang of the work member before making it pass through the rear area, thus greatly increasing the complexity and time of performing this type of maneuver. These drawbacks greatly reduce the functionality of the work vehicles of known type and their fields of application.

Description of the Invention

The main aim of the present invention is to devise a stabilizing device with small overall dimensions which allows the device itself to take up less space on the work vehicle than the stabilizing devices of known type.

A further object of the present invention is to devise a stabilizing device which enables the work vehicle to use fastening means for the attachment to common trailers or semi-trailers.

An additional object of the present invention is to devise a stabilizing device which enables to maximize the number of stabilizing arms mounted on the work vehicle.

Still one object of the present invention is to devise a stabilizing device which enables the retrofitting of the work vehicles.

One additional object of the present invention is to devise a stabilizing device which can be installed onto the work vehicles in a removable manner.

A further object of the present invention is to devise a stabilizing device for road tractors.

Another object of the present invention is to devise a stabilizing device which allows the aforementioned drawbacks of the prior art to be overcome within the framework of a simple, rational, affordable solution which is also easy and effective to use.

The aforementioned objects are achieved by this device having the characteristics of claim 1.

The aforementioned objects are achieved by this work vehicle having the characteristics of claim 8.

Brief Description of the Drawings

Other characteristics and advantages of the present invention will become more apparent from the description of a preferred, but not exclusive, embodiment of a stabilizing device for work vehicles, illustrated by way of an indicative, yet nonlimiting example in the accompanying tables of drawings in which:

Figure 1 is an axonometric view of the device in a retracted configuration according to the invention;

Figure 2 is an axonometric view of the device in a protruding configuration according to the invention;

Figure 3 is a detailed view of some components of the device according to the invention;

Figure 4 is an axonometric view of the work vehicle according to the invention; Figure 5 is a side view of the work vehicle.

Embodiments of the Invention

With particular reference to these figures, reference numeral 1 globally denotes a stabilizing device for work vehicles.

The stabilizing device 1 for work vehicles comprises: at least one supporting frame 3 associated, in use, with at least one work vehicle 2, 20 provided with at least one work member 2 movable and cantilevered from the vehicle itself to carry out a work around the latter; at least two stabilizing arms 4 which are mounted on the supporting frame 3, extending along respective directions of extension A mutually defining an opening angle 5 of the arms themselves and which are intended, in use, to rest on the ground 6 to stabilize the work vehicle 2, 20 during the use of the work member 2.

Appropriately, the stabilizing arms 4 are provided with respective resting members 7 intended, in use, to rest on the ground 6 to stabilize the work vehicle 2, 20.

According to the invention, in addition, the stabilizing arms 4 are movable in rotation between: at least one protruding configuration, wherein they are moved away from the supporting frame 3 and/or from the work vehicle 2, 20 and protrude cantilevered from the supporting frame 3 and/or from the work vehicle 2, 20, and wherein the opening angle 5 is substantially less than 180°; and at least one retracted configuration, wherein they are moved close to the supporting frame 3 and/or to the work vehicle 2, 20 to reduce the overall dimensions of the device 1 and/or of the work vehicle 2, 20 and wherein the opening angle 5 is substantially equal to 180°.

Preferably, in the remainder of the following disclosure the term opening angle 5 means the angle defined at the intersection of the directions of extension A (or their continuations) of the stabilizing arms 4.

Advantageously, the opening angle 5 is variable between 180° and 30° due to the rotation of the stabilizing arms 4.

Appropriately, in the protruding configuration, the stabilizing arms 4 are configured to rest on the ground 6, so as to widen the resting base onto the ground 6 of the work vehicle 2, 20.

Conveniently, in the protruding configuration, both stabilizing arms 4 are rotated, mutually moving close to/away from each other, by the same angle of rotation. Preferably, in the protruding configuration, the opening angle 5 is less than or equal to 110°.

Further embodiments of the device 1 cannot be ruled out wherein, in the protruding configuration, the opening angle 5 corresponds to an angle between 120° and 100°, preferably 110°.

Conveniently, each stabilizing arm 4 rotates around a corresponding axis of rotation B arranged, in use, substantially vertically.

Appropriately, each stabilizing arm 4 rotates around an axis of rotation B which is separate from those of the other stabilizing arms 4.

Preferably, the stabilizing arms 4, in this case their directions of extension A, lie on the same plane of lying arranged, in use, substantially horizontal.

In other words, the stabilizing arms 4 are always arranged horizontally, that is, parallel to the ground 6. Specifically, each stabilizing arm 4 comprises at least one fixed end 8, pivoted to the supporting frame 3 and rotating around the axis of rotation B, and at least one free end 9, opposite the fixed end 8.

Specifically, the free ends 9 are moved away and close by the supporting frame 3 and/or by the work vehicle 2 in the protruding configuration and in the retracted configuration, respectively.

In addition, each stabilizing arm 4 comprises at least one resting member 7 onto the ground 6, mounted at the free end 9 and intended to be arranged resting on the ground 6 in the protruding configuration.

Advantageously, the resting member 7 is mechanically extendable and retractable when moving close to and away from the ground 6, respectively.

In this way, in the protruding configuration, the resting member 7 is extended as far as resting onto the ground 6 to define a stable resting point for the work vehicle 2, 20.

In the retracted configuration, on the other hand, the resting member 7 is retracted and raised from the ground 6, e.g. to reduce the overall dimensions of the device 1 and/or of the work vehicle 2, 20.

Preferably, the resting member 7 is vertically extendable and retractable.

Conveniently, each of the stabilizing arms 4 comprises at least one pair of telescopic stretches, not shown in the figures, movable close to and away from each other along the direction of extension A to reduce and increase respectively, the extension of the arm itself.

In other words, the telescopic stretches allow the close/away movement of the free end 9 to the fixed end 8 of the corresponding stabilizing arm 4.

Preferably, each stabilizing arm 4 is movable independently of the others.

Advantageously, the stabilizing arms 4 rotate with opposite way of rotation during the switch between the protruding configuration and the retracted configuration and vice versa.

In the particular, but not exclusive, embodiment of the device 1 shown in the figures, the fixed ends 8 are arranged close to each other.

In particular, the distance between the fixed ends 8 is substantially less than the length of the stabilizing arm 4.

In this way, the rotation of the stabilizing arms 4 from the retracted configuration to the protruding configuration causes the free ends 9 to move close to each other. Conversely, the rotation of the stabilizing arms 4 from the protruding configuration to the retracted configuration causes the free ends 9 to move away from each other.

Preferably, in this embodiment, each of the stabilizing arms 4 is rotatable by an angle of rotation of substantially at least 70°.

Further embodiments of the device 1 cannot be ruled out wherein, in the retracted configuration, the fixed ends 8 are arranged at a distance substantially greater than or equal to the sum of the lengths of the stabilizing arms 4.

Preferably, in this embodiment, in the retracted configuration, each of the stabilizing arms 4 occupies at least partly the space positioned between the fixed ends 8.

Thus, the rotation of the stabilizing arms 4 from the retracted configuration to the protruding configuration causes the free ends 9 to move away from each other. On the other hand, the rotation of the stabilizing arms 4 from the protruding configuration to the retracted configuration causes the free ends 9 to move close to each other.

Preferably, in this embodiment, each of the stabilizing arms 4 is rotatable by an angle of rotation of substantially at least 110°.

Advantageously, the stabilizing arms 4 are movable in a plurality of protruding configurations.

In particular, the opening angle 5 is of substantially different amplitude in each of the first configurations.

Preferably, in at least one protruding configuration, the opening angle 5 corresponds to an angle less than 180° and greater than or equal to 110°.

Preferably, in at least one protruding configuration, the opening angle 5 corresponds to an angle of between 110° and 40°.

According to a particular, but not exclusive, embodiment of the device 1, in at least one protruding configuration, the opening angle 5 corresponds to an angle less than 180° and greater than or equal to 110°, preferably of 110°, while in at least another protruding configuration the opening angle 5 corresponds to an angle of between 110° and 40°, preferably of 40°.

Conveniently, the supporting frame 3 comprises attachment means 13 to the work vehicle 2, 20 in a removable manner.

In this way, the device 1 is installable on any work vehicle 2, 20, e.g. work vehicles originally lacking stabilizing devices or provided with stabilizing devices of different type.

Therefore, this expedient enables the retrofit of the work vehicles of known type. Further embodiments of the device 1 cannot, however, be ruled out wherein it can be associated with the work vehicle 2, 20 in an immovable manner.

Advantageously, the supporting frame 3 comprises: at least one pair of supporting slabs 11 arranged opposite each other and extending, in use, substantially horizontal, the stabilizing arms 4 being pivoted and located between the pair of supporting slabs 11 ; at least one holding slab 12 located between the pair of supporting slabs 11 and extending, in use, substantially vertical, the holding slab 12 being attached, in use, to the work vehicle 2, 20 by means of the attachment means 13.

In other words, the supporting slabs 11 and the holding slab 12 give the section of the supporting frame 3 a substantially “C” shape.

As an alternative or in combination to what has been described above with respect to the supporting frame 3, particularly with reference to the slabs 11, 12, it cannot be ruled out that the supporting slabs 11 may be opposite each other, not necessarily extending substantially horizontally, and that the holding slab 12 be positioned between the pair of supporting slabs 11, not necessarily extending substantially vertically. It cannot also be ruled out that the device 1 may be attached to the work vehicle 2, 20 in a removable manner not necessarily by means of the attachment of the holding slab 12 to the work vehicle 2, 20 by means of the attachment means 13.

In other words, as an alternative or in combination with what is described above with reference to the supporting frame 3, it cannot be ruled out that the supporting frame 3 may comprise: at least one pair of supporting slabs 11 arranged opposite each other, the stabilizing arms 4 being pivoted and located between the pair of supporting slabs 11 ; and/or at least one holding slab 12 located between the pair of supporting slabs 11.

Preferably, the attachment means 13 are positioned, in use, between the holding slab 12 and the work vehicle 2, 20.

Specifically, the attachment means 13 are mounted on the holding slab 12.

Appropriately, the device 1 comprises at least one lighting assembly, not shown in the figures, provided with one or more signal lights electrically connected to the work vehicle 2, 20 and controllable from the same.

Preferably, the expression “signal lights” mean lights which are commonly installed on vehicles of known type, preferably such as work vehicles, for signaling e.g. braking, turning or other maneuvers typical of these vehicles.

It cannot, however, be ruled out that the lighting assembly may comprise any type of light commonly mounted on road vehicles, e.g. headlights, parking lights and the like.

In this way, the device 1 allows the work vehicle 2, 20 to be provided with the lighting assembly.

This expedient is particularly relevant in the case where the device 1 at least partly covers one or more signal lights of the work vehicle 2, 20 and/or in the case where the work vehicle 2, 20 lacks one or more signal lights.

Appropriately, the device 1 comprises connecting means, not shown in the figures, configured to electrically connect, preferably in a removable manner, the lighting assembly to the work vehicle 2, 20.

In this way, through the connecting means, the work vehicle 2, 20 is configured to control the lighting assembly of the device 1.

Advantageously, the device 1 comprises blocking means 15 for blocking the position of at least one of the stabilizing arms 4 in the protruding configuration and/or in the retracted configuration. Preferably, the blocking means 15 comprise at least one blocking assembly 16, 17, 18, 19 which is adapted to operate simultaneously on the supporting frame 3 and on at least one stabilizing arm 4, by fixing the mutual position of the latter. Preferably, the blocking assembly 16, 17, 18, 19 comprises at least one blocking element 16 adapted to engage the supporting frame 3 and at least one of the stabilizing arms 4, by fixing the mutual position of the latter.

More specifically, the blocking assembly 16, 17, 18, 19 comprises at least one cavity formed on the stabilizing arm 4 and at least one seat 17 formed on the supporting frame 3, preferably on the supporting slab 11. In this way, the blocking element 16 is insertable within the cavity 19 and the seat 17 in a removable manner to block the stabilizing arm 4 to the supporting frame 3.

Conveniently, the blocking means 15 are configured to selectively block the stabilizing arms 4 in both the protruding configuration and the retracted configuration.

Specifically, the blocking assembly 16, 17, 18, 19 comprises at least one seat 17 engaged by the blocking element 16 to block at least one stabilizing arm 4 in the retracted configuration and at least another seat 17 engaged by the blocking element 16 to block at least one stabilizing arm 4 in the retracted configuration. Moreover, it cannot be ruled out that the blocking assembly 16, 17, 18, 19 may comprise at least one counter-seat 18 (at least one for each seat 17), made on the other supporting slab 11, opposite a corresponding seat 17 and adapted to receive the blocking element 16 together with the seat 17 and the cavity 19.

Advantageously, the blocking means 15 are configured to selectively block the stabilizing arms 4 in each protruding configuration.

Specifically, the blocking means comprise a plurality of seats 17, each engaged by the blocking element 16 in a different protruding configuration.

Preferably, the blocking means 15 comprise at least two blocking assemblies 16, 17, 18, 19, each intended to block the position of a respective stabilizing arm 4. Appropriately, the work vehicle 2, 20 comprises at least one vehicle 20 on which the work member 2 is mounted, which is movable along at least one direction of movement C and provided with: at least one pair of sidewalls 21, arranged substantially parallel to each other; at least one front portion 22 extending substantially orthogonal to the sidewalls 21; at least one rear portion 23 extending substantially orthogonal to the sidewalls 21 and arranged opposite the front portion 22;

Preferably, the sidewalls 21 substantially define the overall dimensions by width of the vehicle 20 and/or of the work vehicle 2, 20.

Preferably, the front portion 22 and the rear portion 23 substantially define the overall dimensions by length of the vehicle 20 and/or of the work vehicle 2, 20. Appropriately, the vehicle 20 comprises a bedplate on which the work member 2 is mounted.

Preferably, the bedplate of the vehicle 20 is bounded by the sidewalls 21, by the front portion 22 and by the rear portion 23.

Conveniently, the device 1 is mounted on the work vehicle 2, 20 arranged laterally to the bedplate of the vehicle 20.

In this way, the device 1 is not in the way of the bedplate of the vehicle 20.

Specifically, the device 1 is associated with either one of the sidewalls 21, the front portion 22 or the rear portion 23.

In addition, the directions of extension A are arranged, in the retracted configuration, substantially parallel to the sidewall 21 or to the front portion 22 or to the rear portion 23 with which the device 1 is associated.

In this way, in the retracted configuration, the device 1 substantially follows the profile of the vehicle 20 and/or of the work vehicle 2, 20, minimizing the overall dimensions thereof.

Specifically, in the retracted configuration, if the device 1 is associated with one of the sidewalls 21, the directions of extension A are arranged substantially parallel to the direction of movement C of the vehicle 20.

In more detail, in the retracted configuration, if the device 1 is associated with either the front portion 22 or the rear portion 23, the directions of extension A are arranged substantially orthogonal to the direction of movement C of the vehicle 20. Specifically, the device 1 is arranged at least partly cantilevered from the sidewall 21, from the front portion 22 or from the rear portion 23 with which it is associated.

Preferably, the supporting slab 11 protrudes at least partly overhanging from the sidewall 21, from the front portion 22 or from the rear portion 23.

Conveniently, the holding slab 12 is associated with the sidewall 21, with the front portion 22 or with the rear portion 23.

In this way, the device 1 reduces the overall dimensions of the vehicle 20 vertically.

Appropriately, the horizontal overall dimensions of the device 1 is substantially less than or equal to the horizontal overall dimensions of the sidewall 21, of the rear portion 23 or of the front portion 22 with which the device 1 is associated, preferably when the telescopic stretches are close to each other substantially to minimize the extension of the stabilizing arms 4.

According to a preferred, but not exclusive, embodiment of the device 1 , the same is associated, preferably in a removable manner, with the rear portion 23 of the vehicle 20.

Advantageously, the work member 2 is mounted on the vehicle 20 and is adapted to rotate around an axis of revolution D, preferably vertical, to carry out a work around the work vehicle 2, 20.

Preferably, the work member 2 is rotatable by 360° around the axis of revolution D.

Conveniently, the work member 2 comprises at least one work arm 25 that, in use, extends cantilevered from the vehicle 20.

Preferably, the work arm 25 is mechanically extendable, so that the length of the arm itself can be increased and reduced.

Conveniently, the device 1 maximizes the performance of the work member 2, e.g., its maximum load and outreach, by a predefined angle of rotation, preferably of 360°, around the axis of revolution D.

Advantageously, in at least one protruding configuration, the work arm 25 is arranged hanging where the device 1 is located, is extended to its maximum extension and/or supports the maximum sustainable load without causing the work vehicle 2, 20 to tip over or tilt.

Preferably, the device 1 is not associated with the work member 2.

Preferably, the vehicle 20 is a road and/or truck transport vehicle.

Preferably, the vehicle 20 is provided with tires 30 for ground movement.

According to a further aspect, the present invention relates to a work vehicle 2, 20, comprising: at least one vehicle 20 movable along at least one direction of movement C; at least one work member 2 mounted on the vehicle 20 and movable cantilevered from the vehicle itself to carry out a work around the latter; at least one stabilizing device 1 mounted on the vehicle 20.

Preferably, one or more of the characteristics of the vehicle 20, the work member 2 and/or the device 1 described above with reference to the device 1 are also considered to apply to one or more of the same elements described later in this disclosure with reference to the work vehicle 2, 20.

Preferably, the device 1 is associated with the rear portion 23 of the vehicle 20.

Further embodiments of the work vehicle 2, 20 cannot however be ruled out wherein the device 1 is associated with one of the sidewalls 21 or with the front portion 22.

It cannot also be ruled out that the work vehicle 2, 20 may comprise a plurality of devices 1, each associated with one of the sidewalls 21, with the rear portion 23 or with the front portion 22.

In this way, the devices 1 operate in conjunction with each other to maximize the performance of the work member 2, e.g. its maximum load and outreach, by a predefined angle of rotation, preferably of 360°, around the axis of revolution D. In addition, it cannot be ruled out that the work vehicle 2, 20 may comprise one or more balancing arms 26 different from the stabilizing arms 4 and movable to protrude cantilevered from the work vehicle 2, 20 and to rest on the ground, so as to increase the resting base onto the ground 6 of the work vehicle itself.

In this way, the device 1 operates in conjunction with the balancing arms 26 to maximize the performance of the work member 2, e.g., its maximum load and outreach, by a predefined angle of rotation, preferably of 360°, around the axis of revolution D.

Advantageously, the vehicle 20 comprises fastening means 27 to at least one fitting element 28 of the vehicle itself in a removable manner.

Preferably, the fastening means 27 are mounted on the bedplate of the vehicle 20 on which the work member 20 is mounted.

In addition, the work vehicle 2, 20 is movable between: at least one first configuration of use, wherein the vehicle 20 is released from the fitting element 28; at least one second configuration of use, wherein the vehicle 20 is attached to the fitting element 28 and the device 1 is arranged at a height above the ground 6 substantially less than the height above the ground 6 of the portion of the fitting element 28 attached to the fastening means 27.

Preferably, the term fitting element 28 means a fitting element 28 for vehicles of known type, such as a semi-trailer, a trailer, a box body or the like.

According to a possible yet not exclusive embodiment of the work vehicle 2, 20, the same comprises the fitting element 28.

Preferably, the fastening means 27 are of the type of a fifth wheel.

Specifically, the fastening means 27 are associated with the vehicle 20 without overhanging the device 1.

In other words, the device 1 is associated with the vehicle 20 in a position not underneath the fastening means 27.

In this way, the device 1 is associated with the vehicle 20 in such a way that the height with respect to the ground of the fastening means 27 does not vary.

Preferably, the device 1 is positioned at a height with respect to the ground substantially lower than the height with respect to the ground of the fastening means 27.

Preferably, the device 1 is associated with the rear portion 23 of the vehicle 20 and faces the fitting element 28, e.g. the trailer or semi-trailer.

These expedients allow the fastening means 27 to be attached to common fitting elements 28 of the type of trailers or semi-trailers without having to make structural changes to the same.

In this way, the device 1 increases the functions of the work vehicle 2, 20 without jeopardizing in any way the functions of the vehicle 20 and/or of the fastening means 27.

These advantages are further accentuated by a particular, but not exclusive embodiment of the work vehicle 2, 20, wherein the vehicle 20 is a road tractor 29.

Advantageously, the vehicle 20 comprises at least one driver’s cab 31.

Preferably, the work member 2 is mounted on the vehicle 20 to occupy, at least partly, the space between the driver’s cab 31 and the fitting element 28, for example, as shown in Figure 5.

Specifically, in this embodiment the vehicle 20 is a road tractor of known type. In more detail, according to this embodiment of the work vehicle 2, 20, the device 1 increases the functions of the vehicle 20, without jeopardizing its original functions in any way.

Advantageously, in this embodiment the device 1 is associated with the rear portion 23 of the vehicle 20, as shown in Figure 4.

It has in practice been ascertained that the described invention achieves the intended objects.

In particular, the fact is emphasized that the rotating stabilizing arms in the protruding configuration and in the retracted configuration allow the device to be mounted in a way that reduces the overall dimensions of the same device on the vehicle bedplate compared with stabilizing devices of known type.

In addition, these characteristics allow the vehicle to be provided with fastening means for the attachment to common trailers or semi-trailers.

Again, these characteristics allow maximizing the number of stabilizing arms mounted on the work vehicle.

In addition, these characteristics allow the device to be mounted on work vehicles originally lacking and/or not prepared for the mounting of stabilizing devices or additional stabilizing devices, e.g., for reasons of overall dimensions, structural and functional characteristics and the like. In this way, the device enables the retrofit of a significant number of work vehicles of different type.

In addition, the attachment means allow the stabilizing device to be mounted on the work vehicles in a removable manner. Again, the mechanical characteristics of the stabilizing device covered by the present invention make it possible to specifically increase the functions of road tractors without compromising their original functions in any way.