Claims:WE CLAIM:
1. A system (100) for operating a vehicle, the system (100) comprising:
a support assembly (200) comprising a pair of mounting plates (210), each mounting plate (210) allows a drive wheel of the vehicle to be mounted thereon with an axle extending between the drive wheels;
a double sprocket wheel (D) rotatably mounted on at-least one mounting plate (210);
a first drive (120) comprising a driving sprocket wheel (122) mounted on an output shaft of a power source (110), and a first chain (124) passing around the driving sprocket wheel (122) and the double sprocket wheel (D), rotation of the output shaft causes the double sprocket wheel (D) to rotate; and
a second drive (130) comprising a driven sprocket wheel (132) mounted on the axle and a second chain (134) passing around the double sprocket wheel (D) and the driven sprocket wheel (132), rotation of the first drive (120) rotates the second drive (130) causing the axle to rotate, and thereby the wheels of the vehicle to rotate.
2. The system 100 as claimed in claim 1, wherein the power source (110) comprises of:
a pump (112) connected with an engine of the vehicle; and
a motor (114) coupled with a gearbox (116) of the vehicle, the motor (114) driven/rotated by the pump (112).
3. The system 100 as claimed in claim 1, wherein the double sprocket wheel (D) is pivotally mounted enabling second drive (130) to move pivotally.
4. The system 100 as claimed in claim 1, further comprising a hydraulic cylinder (140).
5. The system (100) as claimed in claim 4, wherein the hydraulic cylinder (140) comprises of a cylinder tube and a movable rod, the cylinder tube pivotally mounted on the vehicle chassis, and the movable rod pivotally mounted on the mounting plate (210) of the support assembly (200), operation of the hydraulic cylinder (140) causes the movable rod to move pushing the vehicle chassis upwards, and the second drive (130) to move pivotally.
, Description:FIELD OF THE INVENTION
[001] The invention relates to a system for operating a vehicle.

BACKGROUND OF THE INVENTION
[002] Work vehicles such as tractor, bulldozer, trailer, excavator, harvester, harvest machine, cultivator, cultivate machine, cargo vehicle, utility vehicle, multifunctional vehicle, multipurpose vehicle/machine, leisure vehicle, pickup vehicle, load vehicle/machine, transport vehicle, agricultural vehicle are widely used. Each work vehicle is designed to carry out dedicated operations, and is accordingly equipped with one or more auxiliary implements attached at their front-end or rear-end.
[003] Most work vehicles are driven through uneven or rough terrains. Also, height of the work vehicle with respect to ground surface may require adjustment to carry out certain operations or before the auxiliary implements are deployed/used. Generally, work vehicles are provided with a drive mechanism to operate the work vehicle and a separate height adjustment mechanism. As is known in the art, the drive mechanism is interconnected with the wheels of the vehicle. Accordingly, as the height adjustment mechanism raises or lowers the work vehicle as per requirement, such adjustments tends to cause tension on various parts of the work vehicle, especially components, mechanical linkages, etc., which interconnect the drive mechanism with the wheels. The tension may even lead to breakage or breakdown of the vehicle. Accordingly, there is a need to address at-least the aforementioned problems.

SUMMARY OF THE INVENTION
[004] Accordingly, the present invention in one aspect provides a system for operating a vehicle, the system comprising a support assembly comprising a pair of mounting plates, each mounting plate allows a drive wheel of the vehicle to be mounted thereon with an axle extending between the drive wheels; a double sprocket wheel rotatably mounted on at-least one mounting plate; a first drive comprising a driving sprocket wheel mounted on an output shaft of a power source, and a first chain passing around the driving sprocket wheel and the double sprocket wheel, rotation of the output shaft causes the double sprocket wheel to rotate; and a second drive comprising a driven sprocket wheel mounted on the axle and a second chain passing around the double sprocket wheel and the driven sprocket wheel, rotation of the first drive rotates the second drive causing the axle to rotate, and thereby the wheels of the vehicle to rotate.

BRIEF DESCRIPTION OF THE DRAWINGS
[005] Reference will be made to embodiments of the invention, examples of which may be illustrated in accompanying figures. These figures are intended to be illustrative, not limiting. Although the invention is generally described in context of these embodiments, it should be understood that it is not intended to limit the scope of the invention to these particular embodiments.
Figure 1 shows a schematic representation of a system for operating a vehicle in accordance with an embodiment of the invention.
Figure 2 shows a support assembly in accordance with an embodiment of the invention.
Figure 3 shows a perspective view of the system installed on a vehicle chassis in accordance with an embodiment of the invention.
Figure 4 shows another perspective view of the system installed on a vehicle chassis in accordance with an embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION
[006] The present invention is directed towards a system for operating a work vehicle. The system is designed to deliver power from an engine of the work vehicle to wheels of the work vehicle so as to move/drive the work vehicle, and also lift or lower the work vehicle as per requirement.
[007] Figure 1 shows a schematic representation of a system 100 for operating a work vehicle. Typically, work vehicles comprises of vehicle chassis, a cabin mounted on the chassis, one or more auxiliary implements, a pair of steering wheels, and a pair of drive wheels. The system 100 comprises a support assembly 200 (shown in figure 2), a power source 110, a first drive 120, a second drive 130 and a hydraulic cylinder 140.
[008] Figure 2 shows the support assembly 200. The support assembly 200 is mounted between the pair of drive wheels of the work vehicle. The support assembly 200 comprises a pair of mounting plates 210, and each mounting plate 210 has plurality of grooves 212 for allowing a drive wheel of the vehicle to be mounted thereon with an axle extending between the drive wheels. As shown in figure 3, a hub 220 for mounting a wheel in provided on outer-side of the mounting plate 210. A double sprocket wheel D is rotatably mounted on inner-side of at-least one mounting plate 210. The double sprocket wheel D is mounted on a shaft 230 shown in figure 2. Further, the support assembly 200 comprises of a rod 240 extending between the mounting plates 210 to provide structural rigidity to the support assembly 200.
[009] As shown in figure 1 and 3, the first drive 120 comprises of a driving sprocket wheel 122, and a first chain 124 passing around the driving sprocket wheel 122 and the double sprocket wheel D. Accordingly, as the driving sprocket wheel 122 is rotated, the double sprocket wheel D is rotated.
[010] As shown in figure 1 and 4,the second drive 130 comprises a driven sprocket wheel 132 mounted on the axle, and a second chain 134 passing around the double sprocket wheel D. Accordingly, as the first drive 120 rotates, the second drive 130 also rotates, causing the axle to rotate, and thereby the wheels of the vehicle to rotate.
[011] Further, as shown in figure 1, the power source 110 comprises a pump 112, a motor 114 and a gearbox 116. The pump 112 is connected with an engine (not shown) of the vehicle, whereby the engine drives the pump 112. The pump 112 upon being driven by the engine rotates the motor 114. The motor 114 is coupled with a gearbox 116 of the vehicle, and the driving sprocket wheel 122 of the first drive 120 is mounted on an output shaft of the gearbox 116. Accordingly, upon operation of the engine, the output shaft of the gearbox 116 rotates the first drive 120 causing the second drive 130 to rotate the axle, and thereby the wheels of the vehicle.
[012] In an embodiment of the invention, the double sprocket wheel D is pivotally mounted enabling the second drive 130 to move pivotally. Accordingly, the second drive 130 is pivotally movable about the double sprocket wheel D.
[013] Further, the system 100 comprises a hydraulic cylinder 140. In this regard, during field operations height of the vehicle chassis may need to be lowered or lifted, and for road travel the vehicle chassis is kept higher for better ground clearance. The hydraulic cylinder 140 enables adjustment of the vehicle chassis. The hydraulic cylinder 140 has a cylinder tube and a movable rod, the movable rod movable with respect to the cylinder tube. The cylinder tube is mounted on the vehicle chassis and movable rod is mounted on the mounting plate 210 of the support assembly 200. The hydraulic cylinder 140 is pivotally mounted on the vehicle chassis as well as the mounting plate 210, and is configured to be in an open position and a closed position. In the open position, the movable rod moves out of the cylinder tube pushing the vehicle chassis upwards, thereby raising the height of the vehicle chassis. When the hydraulic cylinder 140 is operated, the second drive 130 also moves pivotally due to which there is no tension on the chain of the second drive 130 or the first drive 120. Advantageously, any possibility of a breakdown due to tension on the chain is obviated. Further, in the closed position, the movable rod retracts inside the cylinder tube moving the vehicle chassis to a lower height.
[014] In operation, for road travel, as the engine is operated by a driver, output shaft of the gearbox 116 rotates the first drive 120 causing the second drive 130 to rotate the axle, which rotates the wheels of the vehicle. For adjusting the height of the vehicle, the operator can operate the hydraulic cylinder 140 by a switch or a lever provided in the vehicle cabin. The hydraulic cylinder 140 upon operation pushes the vehicle chassis. Advantageously, the present invention delivers power from engine to wheels of the work vehicle so and also varies height of the work vehicle whereby components of the vehicle, especially the support assembly or the first drive or the second drive are not subjected to any load or tension when height of the work vehicle is varied.
[015] While the present invention has been described with respect to certain embodiments, it will be apparent to those skilled in the art that various changes and modification may be made without departing from the scope of the invention as defined in the following claims.