TECHNICAL FIELD

[0001] The present subject matter relates generally to a powertrain assembly. More particularly but not exclusively, the present subject matter also relates to a vehicle and a swingarm assembly with a powertrain assembly.

BACKGROUND

[0002] Generally, vehicles use different types of prime movers like internal combustion engine, electric motor and/or a combination thereof. Further, in case of electric motors being used in and/or as prime mover, vehicles are known to have an independent motor and/or an in-wheel hub motor. An independent motor can be designed and used for higher torque applications. Independent motors are conventionally mounted at an appropriate location on the frame and do not have limitations on the amount of power due to their placement. The vehicles having independent motor, whether alone or in combination with an engine, also need an efficient transmission assembly for transmitting the power from the prime mover to the output, for example one or more wheels or drive belts/chains. The transmission assembly conventionally includes a primary and secondary reduction stage. The primary reduction stage includes plurality of drive means such as gears. The gears in the primary reduction increases weight and need more maintenance for better lubrication such as oil. Since a more powerful motor having larger size is mounted on the frame of the vehicle, it often leads to transmission losses due to the distance between the motor and the wheel. Further, a secondary reduction stage is also required that will transmit the torque from the primary reduction stage to the final output in the form of wheel or chain drive. The secondary reduction stage in addition to the primary reduction stage creates layout constraints. Due to said layout constraints particularly in saddle type vehicle, a mono-shock absorber is conventionally used for rear suspension and that is to be mounted to a crankcase assembly of the powertrain or the frame member. The mono-shock absorber is required to be packaged substantially in the center of the vehicle. Dual shock absorbers find less (or almost no) application in a vehicle having an independent motor as the prime mover because the crankcase or the frame is being made to have dedicated provision for mounting a single shock absorber. This increases the overall weight of the vehicle. Further, in this configuration with a motor mounted on the frame member of the vehicle, single sided swingarms are known to be used as they are less complicated to manufacture compared to two sides swingarm assembly. However, single sides swingarms need to have greater strength and would add to the weight of vehicle in addition to the weight of the mountings needed for the motor on the crankcase. Further, this may also lead to imbalanced mass distribution on the vehicle. This is a challenge for the designers to provide an improved riding comfort under various driving conditions especially when various parameters like yaw, roll and pitch being considered.

[0003] On the other hand, an in-wheel hub motor is smaller in size and lighter in weight. It has comparatively lesser distance between motor and the wheel thereby reducing power transmission losses. Further, due to the reduced size of in-wheel motor, such a vehicle can have dual shock absorbers which are much preferred by consumers for better comfort due to the reduced size of the motor and reduced distance between the motor and the wheel. However, the in-wheel hub motor has torque limitation because torque increment is dependent upon the size of the motor. Any increase in size of an in-wheel hub motor would lead to an increase in wheel diameter which may require a change in vehicular architecture which is not desirable for a given vehicle.

[0004] To overcome the same, one solution was to provide a vehicle with mono shock absorber and a transmission of two reduction stages, i.e., the first reduction stage and the second reduction stage. The first reduction stage has gears which required lubrication and a higher noise is often observed due to the distance between the pulleys and gears in the transmission assembly. In these vehicles, the primary reduction is closer to the longitudinal axis of the vehicle as compared to secondary reduction which is relatively farther from the longitudinal axis of the vehicle. In this configuration, two shock absorbers would not be preferred used as doing so would increase the width of the vehicle. Further, adjustments and maintenance of the primary reduction assembly and/or the mono-shock absorber would necessarily require at least partly dismantling the swingarm assembly and the secondary reduction assembly. This also leads to higher transmission losses, higher weight of transmission system, increased vehicle width, inaccessibility to the shock absorbers, and increased belt tension.

[0005] Therefore, it becomes a challenge to solve the above-cited problems. Thus, the object of the present subject matter is to have a powertrain assembly with a prime mover with higher power output to be installed in the vehicle without increasing the width or the length of the vehicle and with improved accessibility and serviceability of the shock absorbers and drive assemblies reduced noise from the transmission assembly of the vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The details are described with reference to an embodiment of a storage assembly along with the accompanying figures. The same numbers are used throughout the drawings to reference similar features and components.

[0007] Figure 1 illustrates one embodiment of the vehicle, the powertrain assembly and the swingarm assembly described herein in a perspective view from vehicle left side.

[0008] Figure 2 illustrates a perspective view of an embodiment of the present disclosed subject matter with a right side of saddle type vehicle having the powertrain assembly and swingarm assembly with various components.

[0009] Figure 3 illustrates a right-side view of an embodiment of the powertrain assembly on a saddle type vehicle.

[00010] Figure 4a illustrates a left side view of an embodiment of the powertrain assembly and Figure 4b illustrates a top view of an embodiment of the present vehicle having a powertrain assembly.

[00011] Figure 5 illustrates a perspective view of an embodiment of the present swing arm assembly without the powertrain components from a vehicle left side direction. [00012] Figure 6 illustrates a perspective view of an embodiment of the present swing arm assembly without the powertrain components from a vehicle right side direction

[00013] Figure 7a illustrates the side view of an embodiment of the swing arm assembly from a vehicle right side. Fig. 7b illustrates a side view of an embodiment of the swing arm assembly from a vehicle left side.

[00014] Figure 8 illustrates the top view of an embodiment of swing arm assembly without the powertrain assembly.

[00015] Figure 9 illustrates a left perspective view of an embodiment of the powertrain assembly with the swingarm assembly and the suspension showing the expanding view of one of the arms of the swing arm assembly showing the adjustable opening.

[00016] Figure 10 illustrates a side view of an embodiment of the powertrain assembly showing the transmission assembly and the swingarm assembly with an expanded view of the first portion of the swing arm assembly showing the adjustable slot for the prime mover.

[00017] Figure 11 illustrates the exploded view of the saddle type vehicle from the left side showing the frame assembly, the powertrain assembly along with swingarm assembly and the rotating member.

[00018] Figure 12illustrates the exploded perspective view of the saddle type vehicle from the right side showing the frame assembly, the powertrain assembly along with swingarm assembly and the rotating member.

[00019] Figure 13 illustrates an exploded view of the embodiment of the present powertrain assembly and the swingarm assembly.

[00020] Figure 14a illustrates a side view of an embodiment of the powertrain assembly and the swingarm assembly showing the plane of cross section “XSEC0002”. Figure 14b illustrates a top view of the cross-section across plane XSEC0002 as shown in Fig 14a.

DETAILED DESCRIPTION [00021] In order to achieve one or more of the above-mentioned objectives and other related objectives, the present invention provides a powertrain assembly, a swing arm assembly and a vehicle having the powertrain assembly and the swing arm assembly.

[00022] The present invention provides, a powertrain assembly of a vehicle comprises a prime mover for providing power to propel the vehicle; at least one rotating member for enabling motion of the vehicle using said power from the prime mover; and a transmission assembly. The transmission assembly includes a plurality of drive assemblies for transferring the output of the prime mover to the rotating member for enabling the motion of the vehicle. The plurality of drive assemblies includes at least a first drive assembly and a second drive assembly. The vehicle comprises a frame assembly and a swing arm assembly. The swing arm assembly of the vehicle includes a first portion which is pivotably connected to the frame assembly of the vehicle. The first portion is configured to mount the prime mover with the help of a plurality of mounting means. A second portion of the swing arm assembly is configured to have at least a pair of arms. The arms of the second portion of the swing arm assembly are configured to mount the rotating member.

[00023] In one embodiment the rotating member can be one or more wheel. The second portion is also configured to mount a suspension assembly in which the first drive assembly is operably connected to the prime mover for transferring a power from the prime mover to the second drive assembly. The second drive assembly then transfers the power from the first drive assembly to the rotating member. The arms of the swing arm assembly are configured to have an opening to provide an operable connection between the first drive assembly and the second drive assembly. The opening is configured to receive a bearing. The bearing is provided with a hole. The hole is configured to receive a connecting shaft configured to provide operable connectivity for the first drive assembly and the second drive assembly.

[00024] As per one embodiment of the invention, in the powertrain assembly, the second drive assembly is substantially disposed in a space defined by the arms of the swingarm assembly. The first drive assembly is substantially disposed outside of the space defined by the arms of the swing arm assembly.

[00025] As per one embodiment of the invention, in the powertrain assembly, the prime mover includes an output shaft. The first drive assembly includes a first drive means which is installed on the output shaft of the prime mover. The first drive assembly also includes a second drive means and a first drive connector. The first drive connector is configured to operably connect the first drive means and the second drive means. Further, the second drive assembly includes a third drive means which is operably connected to the second drive means through a connecting shaft. The hole on the opening receives the connecting shaft for coaxially mounting the second drive means and the third drive means. The second drive assembly also includes a fourth drive means and a second drive connector. The second drive connector operably connects the third drive means and the fourth drive means. The fourth drive means is operably coupled to the rotating member for rotating the rotating member.

[00026] As per one embodiment of the invention, in the powertrain assembly, the opening is configured to receive a connecting shaft. The connecting shaft is configured to co-axially mount the second drive means and the third drive means. [00027] As per one embodiment of the invention, in the powertrain assembly, the rotating member is a wheel that comprises mounting means to mount the fourth drive means on the wheel.

[00028] As per one embodiment of the invention, in the powertrain assembly, the suspension assembly comprises at least a pair of shock absorbers.

[00029] As per one embodiment of the invention, in the powertrain assembly, the prime mover is selected from a group consisting of one or more electric motors, one or more internal combustion engines and a combination of electric motor(s) and internal combustion engine(s).

[00030] As per one embodiment of the invention, in the powertrain assembly, the first drive means, second drive means, third drive means and fourth drive means include pulleys. Also, the first drive connector and the second drive connector comprise drive belts that operably connect the pulleys. [00031] As per one embodiment of the invention, a diameter of the first drive means is less than a diameter of the second drive means and a diameter of third drive means is less than a diameter of the fourth drive means and the fourth drive means is coaxially mounted with the rotating member.

[00032] As per one embodiment of the invention, in the powertrain assembly, the plurality of mounting means of the swingarm assembly for mounting the prime mover. The plurality of mounting means includes a slot which is configured to enable a displacement of the prime mover relative to the swingarm assembly thereby enabling adjustment of tension in the first drive connector.

[00033] In another aspect of the invention, a swing arm assembly for a vehicle comprises a first portion which is pivotably connected to a frame assembly of the vehicle. The first portion is configured to mount a prime mover which propels the vehicle. The prime mover is mounted on the first portion using a plurality of mounting means. The swing arm assembly also comprises a second portion which is attached to the first portion. The second portion is configured to have at least one pair of arms. The arms of the second portion are configured to mount a rotating member of the vehicle. In one embodiment, the first portion and the second portion are integrally formed to have a stepped portion between the first portion and the second portion. The second portion is configured to mount a suspension assembly of the vehicle. The suspension assembly comprises at least one pair of shock absorbers. The one of the arms of the suspension assembly is configured to have an opening. The opening on the arm is configured to operably connect a plurality of drive means of a transmission assembly of the vehicle.

[00034] In one embodiment of the invention, in the swing arm assembly, the plurality of mounting means to mount the prime mover includes one or more adjustable slot. The adjustable slot is configured to provide a displacement of the prime mover in order to adjust a tension in a first drive connector of the transmission assembly of the vehicle.

[00035] In one embodiment of the invention, in the swing arm assembly, the rotating member is a wheel. The wheel is rotatably installed on an axle. The axle is mounted using plurality of mounting means which are provided on the arms of the second portion. The plurality of mounting means includes a plurality of slots in order to enable a displacement of the wheel mounted on the axle in a vehicle length direction for adjusting a tension in a second drive connector of the transmission assembly of the vehicle.

[00036] In one embodiment of the swing arm assembly, the pair of arms is configured to have substantially triangular shaped portions with openings. The opening is configured to mount one end of the pair of shock absorbers of the suspension assembly using known type of fasteners in art. The other end of the shock absorbers is attached to frame assembly of the vehicle.

[00037] In one embodiment of the invention, in the swing arm assembly, at least one of the pair of arms is configured to have a brake caliper mounting means. In one aspect of the invention, the brake caliper mounting means are integrally formed with said at least one of the pair of arms of the swingarm assembly.

[00038] In yet another embodiment of the present invention, a vehicle comprises a frame assembly for skeletal support of the vehicle; a prime mover for providing power to propel the vehicle; at least one rotating member for enabling motion of the vehicle using the power from the prime mover; a suspension assembly that comprises at least one pair of shock absorbers. The vehicle also comprises a transmission assembly which includes a plurality of drive assemblies for transferring the output of the prime mover to the rotating member for enabling the motion of the vehicle. The plurality of drive assemblies includes at least a first drive assembly and a second drive assembly. The vehicle also comprises a swingarm assembly that further includes a first portion which is pivotably connected to the frame assembly of the vehicle. The first portion is configured to mount the prime mover using plurality of mounting means. The swing arm assembly includes a second portion which is attached to the first portion. The second portion comprises at least a pair of arms. The arms of the swing arm assembly are configured to mount the rotating member and to mount the suspension assembly. A first drive assembly of the suspension assembly is operably connected to the prime mover to transfer a power from the prime mover to a second drive assembly. The second drive assembly is configured to transfer the power from the first drive assembly to the rotating member. The arms of the swing arm assembly are configured to have an opening. The opening on the arms is configured to provide an operable connection between the first drive assembly and the second drive assembly.

[00039] The embodiments of the present invention will now be described in detail with reference to an embodiment in a saddle type vehicle along with the accompanying drawings. However, the disclosed invention is not limited to the present embodiments.

[00040] Figure 1 illustrates a perspective view of one embodiment of a powertrain assembly 101 and that of a swing arm assembly 400 from a vehicle left side. The same is installed on a saddle type vehicle 100. The powertrain assembly 101 disposed substantially below a frame assembly 101 of the saddle type vehicle 100. The powertrain assembly 200 comprises a prime mover 201 , a rotating member 202 and a transmission assembly 300. The prime mover 201 is depicted in this embodiment as an independent motor but the prime mover 201 can be an internal combustion engine mounted on the frame or a combination of an internal combustion engine and independent motor. The rotating member 202 is depicted as a rear wheel of the vehicle 100 which is where the output power of the prime mover 201 is transferred and propels the vehicle 100. However, the rotating member 202 can also be multiple wheels or a chain drive member for multi terrain vehicles. The transmission assembly 300 includes a plurality of drive assemblies and drive means (shown in Fig 4a and Fig 9). Figure 1 also shows a swing arm assembly 400 and a suspension assembly 500 of the vehicle whereby rotating member 202 is disposed behind a first portion 400f of the swingarm assembly 400 in side view of the vehicle 100.

[00041] Figure 2 illustrates a perspective view of one embodiment of the powertrain assembly 101 and that of the swing arm assembly 400 from a vehicle right side. The swing arm assembly 400 has a first portion 400f and a second portion 400s. The first portion 400f is pivotably connected to the frame assembly 101 of the vehicle 100. The first portion 400f is configured to mount the prime mover 201 using a plurality of mounting means 400m. The second portion 400s is connected to the rotating member 202 through a pair of arms 400sa, 400sb (shown in Fig. 6). Each of the pair of arms comprises at least one adjustable opening 400msw. The second portion 400s is configured to mount the suspension assembly 500 as well as the rotating member 202 using means known in the art such as an axle, bearing etc. The suspension assembly 500 comprises a pair of shock absorbers (500a, 500b) (shown in Fig.9). One end of the shock absorbers (500a, 500b) is detachably attached to the frame assembly 101 and the other end to the pair of arms 400sa and 400sb (shown in Fig.6) of the swing arm assembly 400.

[00042] Figure 3 illustrates a side view of an embodiment of the powertrain assembly 200 on a saddle type vehicle 100 from the vehicle right side. The powertrain assembly 200 has the prime mover 201 being mounted on the first portion 400f of the swing arm assembly 400 using the mounting means 400m. The second portion 400s of the swing arm assembly 400 is configured to mount the rotating member 202 with the help of the pair of arms 400sa, 400sb (shown in Fig. 6). The second portion 400s also mounts the suspension assembly 500 having the pair of shock absorbers (500a, 500b).

[00043] Figure 4a illustrates a left side view of an embodiment of the powertrain assembly 200 and Fig. 4b illustrates top view of an embodiment of the present vehicle 100 having the powertrain assembly 200. The powertrain assembly 200 is mounted on the frame assembly 101 of the saddle type vehicle 100. The powertrain assembly 200 comprises the transmission assembly 300. The transmission assembly 300 includes a plurality of drive assemblies 301 for receiving the output from the prime mover 201 and transferring the same to the rotating member 202. The plurality of drive assemblies 301 comprises a first drive assembly 30 If (also shown in Fig. 9) and a second drive assembly 301s (shown in Fig.12b). The first drive assembly 30 If comprises a first drive means 30 Iff, a second drive means 301fs and a first drive connector 301fc. The first drive means 30 Iff is mounted on the output of the prime mover 201 and transfers the power from the prime mover 201 to the second drive means 301fs through the first drive connector 301fc. The drive connectors (301fc, 301 sc) can be chain or belt or any driving means like pulley wheels that gives endless transmission. The second drive assembly 301s includes a third drive means 301st (shown in Fig.12b), a second drive connector 301sc, and a fourth drive means 301sf. The fourth drive means 301sf is mounted on the rotary member 201 whereby rotation of the fourth drive means 301sf rotates the rotary member 201 and propels the vehicle 100. The above description read with that of Figure 1 and 2 shows that the prime mover 201 is mounted on the swing arm assembly 400 instead of the frame assembly 101 in the known vehicles. This effectively reduces the distance between the first drive means 30 Iff and second drive means 301fs thereby reducing the length of the first drive connector 301fc. This leads to less friction in the first drive connector 301fc and consequent reduction in the high noise. Further, in one embodiment, the use of pulley system for the first drive assembly 30 If and the second drive assembly 301s instead of chain and gear also reduces the high noise significantly. Fig. 4b shows the top view of the saddle type vehicle 100 showing the frame assembly 101, the prime mover 201, a connecting shaft 400ax and the pair of arms 400sa, 400sb of the swing arm assembly 400. The connecting shaft 400ax passes through an opening 400op (shown in Fig.5) and operably connects the first drive assembly 30 If and the second drive assembly 301s. In one aspect of the invention, the shaft 400ax passes through the opening 400op (shown in Fig.5) and is configured to operably connect the second drive means 301fs (of the first drive assembly 30 If) and the third drive means 301st (of the second drive assembly 301s). This configuration ensures that the first drive assembly 30 If, which is first reduction stage of the transmission assembly 300, is disposed farther to the vehicle longitudinal axis and substantially outside the space defined by the pair of arms 400sa, 400sb of the swingarm assembly 400. On the other hand, the second drive assembly 300s is substantially disposed within the space defined by the said pair of arms 400sa, 400sb. This arrangement allows for mounting of the dual shock absorbers 500a, 500b of the suspension assembly 500 without interfering with the drive assemblies (30 If and 301s) and thus, without increasing width of the vehicle 100. Also, in this configuration, for any adjustment or maintenance of the primary reduction stage i.e., first drive assembly 30 If, the wheel or other components need not be disturbed. [00044] Figure 5 illustrates a perspective view of an embodiment of the present swing arm assembly 400 without the powertrain components from a vehicle left side direction. Figure 6 illustrates a perspective view of an embodiment of the present swing arm assembly 400 without the powertrain components from a vehicle right side direction Figure 7a illustrates the side view of an embodiment of the swing arm assembly 400 from a vehicle right side. Fig. 7b shows a side view of an embodiment of the swing arm assembly 400 from a vehicle left side. Figure 8 illustrates the top view of an embodiment of swing arm assembly without the powertrain. Figures 5, 6, 7a, 7b and 8 have been discussed together for clarity and easy reference. In this embodiment, the swing arm assembly 400 has the first portion 400f and the second portion 400s formed integrally with each other. The first portion 400f and the second portion 400s are integrally formed and have a stepped portion 400sp between the first portion 400f and the second portion 400f. In one aspect of the swing arm assembly 400, the stepped portion 400sp forming between the first portion 400f and the second portion 400s has a substantially inclined profile starting from one end of the first portion 400f to another end of the second portion 400s. In another embodiment of the invention, it can also be straight inclined or curved inclined. The stepped portion 400sp thus gives enough room for the prime mover 201 which is installed on the first portion 400f of the swing arm assembly 400. The at least one of the pair of arms 400sa, 400sb of the second portion 400s is configured to have a brake caliper mounting means 400bc which is integrally formed with the said pair of arms 400sa, 400sb of the swing arm assembly 400. The brake caliper mounting means 400bc enables mounting of one or more brake calipers which enable application of breaking force on the rotating member 202.

[00045] In this embodiment, the opening 400op is being configured to receive the connecting shaft 400ax which operably connects the second drive means 301fs, and the third drive means 301st (shown in Fig. 13) of the transmission assembly 300 of the saddle type vehicle 100. The first portion 400f of the swing arm assembly 400 mounting the prime mover 201 using the mounting means 400m includes a plurality of adjustable slots 400msp which are configured to provide a displacement of the prime mover 201 in order to adjust a tension in the first drive connector 301fc (shown in Fig. 9 and Fig. 13). The rotating member 202 is rotatably installed on the connecting shaft 202ax. Further, the pair of arms 400sa, 400sb have the plurality of mounting means 400m which further includes a plurality of adjustable openings for enabling the displacement of the rotating member 202 in the vehicle length direction for adjusting a tension in the second drive assembly 301fc of the transmission assembly 300 of the saddle type vehicle 100. Furthermore, the pair of arms 400sa, 400sb have a substantially triangular portion 400t having at least one opening 400os. The opening 400os is configured to mount the pair of shock absorbers 500a, 500b of the suspension assembly 500 using known detachable fasteners.

[00046] Figure 9 illustrates a perspective view of an embodiment of the transmission assembly 300 mounted on the swingarm assembly 400 from a vehicle left side. The Figure 9 shows the expanding view of one of the arms 400sa, 400sb of the swing arm assembly 400 showing the adjustable opening 400msw. During operation of the vehicle, due to prolonged use, a slackness tends to take place in the second drive connector 301sc. The adjustable opening 400msw on both the pair of arms 400sa and 400sb allows for adjusting the position of the rotating member 202 in a vehicle length direction to adjust the tension in said second rive connector 301sc. The transmission assembly 300 ofthe saddle type vehicle 100 comprises the plurality of the drive assemblies 301 for receiving and transferring the output of the prime mover 201 to the rotating member 202 of the saddle type vehicle 100. The plurality of drive assemblies 301 of the transmission assembly 300 comprises the first drive assembly 301f and the second drive assembly 301s. The first drive assembly 30 If is operably connected to the prime mover 201 to transfer power from the prime mover 201 to the second drive assembly 301s. The second drive assembly 301s being substantially disposed in a space defined by the pair of arms 400sa, 400sb of the swing arm assembly 400 is configured to transfer the power to the rotating member 202. The first drive assembly 30 If is disposed outside the space defined by the pair of arms 400sa, 400sb of the swing arm assembly 400. The first drive assembly 30 If includes a first drive means 30 Iff being installed on an output shaft 201ax of the prime mover 201; a second drive means 301fs; and a first drive connector 301fc being configured to operably connect the first drive means 30 Iff and the second drive means 301fs. The second drive assembly 301s includes athird drive means 301st being operably connected to the second drive means 301fs; a fourth drive means 301sf; and a second drive connector 301 sc being configured to operably connect the third drive means 301st and the fourth drive means 301sf. The fourth drive means 301sf is operably coupled to the rotating member 202 to rotate it. The connecting shaft 400ax is configured to co-axially mount the second drive means 301fs and the third drive means 301st. A diameter of the first drive means 30 Iff is less than the diameter of the second drive means 301fs and a diameter of the third drive means (301st) is less than the diameter of the fourth drive means 301sf. The fourth drive means 301sf is co-axially mounted with the rotating member 202. The rotating member 202 is rotatably installed on the connecting shaft 202ax. The connecting shaft 202ax is mounted using the plurality of mounting means 400msw provided on the pair of arms 400sa, 400sb. The plurality of mounting means is adjustable openings 400msw in order to enable a displacement of the rotating member 202 on the connecting shaft 202ax in a vehicle length direction for adjusting a tension in the second drive connector 301 sc of the transmission assembly 300 of the vehicle 100. It is to be noted that the adjustable openings 400msw are easily accessible for the servicing personnel.

[00047] Figure 10 illustrates a side view of an embodiment of the powertrain assembly 200 showing the swingarm assembly 400 with an expanded view of the first portion 400f having the adjustable slot 400msp. The first drive assembly 30 If is operably connected to the prime mover 201 to transfer the power. The plurality of mounting means 400m of the swing arm assembly 400 for mounting the prime mover 201 include a plurality of adjustable slots 400msp. During the power transmission for operating the vehicle, the enough tension should be sustained in orderto avoid loosening ofthe first drive connector 301fc. Further, the prime mover 201 being installed on the first portion 400f tends to deviate from its original position when the tension is no longer sustained with time. The plurality of adjustable slots 400msp are therefore configured to enable a relatable displacement of the prime mover 201 to the swing arm assembly 400 and thus adjusting tension in the first drive connector 301fc. It is to be noted that the adjustable slots 400msp are easily accessible for the servicing personnel. Further, the adjustable openings 400msw and adjustable slots 400msp being easily accessible adjusters can be provided on either side of the vehicle 100.

[00048] Figure 11 illustrates the exploded perspective view of the saddle type vehicle from the left side showing the frame assembly 101, the powertrain assembly

200 along with swingarm assembly 400 and the rotating member 202.

[00049] Figure 12 illustrates the exploded perspective view of the saddle type vehicle from the right side showing the frame assembly 101, the powertrain assembly 200 along with swingarm assembly 400 and the rotating member 202. Figure 12 particularly shows the location and arrangement of the third drive means 301st of the second drive assembly 301s. The third drive means 301st is operably connected to the second drive means 301fs through the opening 400op and shaft 400ax and on the other hand is operably connected to the fourth drive means 301sf. The fourth drive means 301sf and the rotating member 202 are coaxially mounted on the shaft 202ax to enable the rotation thereto and propelling of the vehicle 100. In another embodiment, the rotating member can be a wheel or a plurality of wheels on a shaft and operably connected through a differential (not shown) or other known means in the art.

[00050] Figure 13 illustrates the exploded view of an embodiment of the powertrain assembly 200 of the saddle type vehicle 100. The respective components have been discussed at length in the previously mentioned paragraphs. In this view, however, the output shaft 20 lax of the prime mover 201 is not seen as it may be concealed within the outer cover of the prime mover 201. A skilled person can make an educated estimate of the location of the output shaft 201ax of the prime mover

201 based on the mounting location of the first drive means 30 iff.

[00051] Fig. 14a illustrates a side view of an embodiment of the powertrain assembly 200 showing the plane of cross-section “XSEC0002”. Fig. 14b shows the top view of the cross-section across plane XSEC0002 as shown in Fig. 14a. The rotating member 202 is mounted between the pair of arms 400sa, 400sb (shown in Fig. 13) of the swing arm assembly 400 (shown in Fig. 5). The connecting shaft 400ax has been disposed into the opening 400op (shown in Fig. 5) in order to coaxially mount the first drive assembly 30 If and the second drive assembly 301s with the second portion 400s of the swing arm assembly 400. The output shaft 20 lax has been disposed to coaxially mount the prime mover 201, the first portion 400f and the first drive means 30 Iff of the first drive assembly 30 If in the transmission assembly 300 of the saddle type vehicle 100. The various shafts are mounted using known mountable means in the art like nut bolts and bearings. List of Reference numerals:

100: Vehicle

101 Frame assembly

200 Powertrain assembly

201 Prime mover 0 lax Output shaft of prime mover

202 Rotating member 02ax Shaft for mounting rotating member 202

300 Transmission assembly

301 Plurality of drive assemblies

301f First drive assembly

301s Second drive assembly

301fc First drive connector

301sc Second drive connector

30 Iff First drive means

301fs Second drive means

301st Third drive means

301sf Fourth drive means

400 Swing arm assembly

400f First portion

400s Second portion 00sp Stepped portion

400m Plurality of mounting meanssa, 400sb Pair of arms 00op Opening for connecting shaft 400ax 00os Opening for installing shock absorbers 500a, 500b

400t triangular shaped portion 00ax Connecting shaft in opening 400op00msp Plurality of Adjustable slots00msw Plurality of Adjustable openings 400bc Brake Caliper

500 Suspension assembly

500a, 500b Shock Absorbers