Description:TECHNICAL FIELD
[001] The present disclosure relates generally to a field of a forward, reverse, and neutral motion gear assembly for vehicle. More specifically, it pertains to a compact and cost-effective forward, reverse, and neutral motion gear assembly.

BACKGROUND OF THE INVENTION
[002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[003] While operating a working vehicle, such as an agricultural tractor, large variations in torque and speeds are imperative for performing various field operations. To fulfil these variations, gear transmission was introduced in working vehicles. A transmission driveline is used to provide desired torque or speed depending on field requirements and/or the demands of the operation being performed by working vehicle. A transmission driveline includes a speed gear box which offers multiple speed options derived from the input engine speed in descending order, an option of a neutral position which disconnects speed and torque transfer from the engine, an option to transfer motion in reverse direction. Further, the transmission driveline comprises a differential system and a final drive arrangement. The differential system is a special arrangement of gears to permit one of the driving wheels of the working vehicle to rotate slower or faster than the other to facilitate turning of the working vehicle on a curved path. Final drive arrangement is a gear reduction unit in the transmission driveline between the differential system and the driving wheels. Final drive arrangement transmits the power finally to the driving axles and the driving wheels.
[004] A working vehicle, in various operations such as tillage, loader and dozer work, leveller, scraper, major agriculture, loader, haulage, construction application and the likes requires frequent direction shifting from forward to reverse or from reverse to forward at required operating speed. Therefore, the driveline includes an auxiliary shuttle gear system, which is combined in-line with a speed gear box to enable working vehicle to frequently change direction in forward or reverse at required operating speed.
[005] Conventionally, auxiliary shuttle gear system, shown in FIG. 1, has a separate mechanical housing 104, which includes set of gear sets, shafts, bearings, and the likes. The set of gear sets enable an auxiliary shuttle gear system to move the working vehicle in forward and reverse direction alternatively. The mechanical housing 104 of an auxiliary shuttle gear system requires additional volume and extra space in transmission driveline. Also, due to various components involved, an auxiliary shuttle gear system becomes complex.
[006] In an existing technology, an auxiliary shuttle gear system comprises a housing. The housing includes an input shaft, an output shaft, set of input gears, set of output gears, idler gear, shafts, bearings, and the likes. A set of input gears is coupled with the set of input shafts and the set of output gears is coupled with the set of output shafts to provide rotational motion to the output shaft in both clockwise and anticlockwise directions thereby inducing forward or reverse motion to the working vehicle. Disadvantage with the existing technology is that assembly of components requires extra space in transmission driveline of working vehicle. The assembly of components increases packaging space of a working vehicle which leads to increase in wheel base of working vehicle. Another disadvantage is that large wheel base increases turning radius of working vehicle. Another disadvantage is that the existing technology due to increase in number of components and their wear and tear, the reliability of the working vehicle gets adversely affected. Another disadvantage of existing technology is due to increased number of components and their complexities maintainability of the working vehicle is adversely affected. Yet another disadvantage of the existing technology is due to increase in number of components of working vehicle, the cost of working vehicle is adversely affected.
[007] There is, therefore, a need in the art to substantially reduce the overall packaging space, number of components and complexity of the working vehicle by eliminating the auxiliary shuttle gear system and replacing its function by providing a simple, compact, and cost effective forward, reverse, and neutral motion gear assembly for vehicle as a part of its transmission driveline.
[008] Alternatively, the space, complexity, and cost saved by elimination of the auxiliary shuttle gear system can be utilised for providing additional features and thereby enhancing value proposition of the working vehicle. The additional features can be selected from group including under drive or overdrive mode.

OBJECTS OF THE INVENTION
[009] A general objective of the present disclosure is to provide a compact and a cost-effective solution for eliminating the auxiliary shuttle gear system and thereby decreasing overall packaging space and reducing complexity and overall cost of the vehicle.
[0010] An object of the present disclosure is to provide a forward, reverse, and neutral motion gear assembly for vehicle.
[0011] Another object of the present disclosure is to provide forward, reverse, and neutral motion gear assembly for vehicle by eliminating various components involved in the auxiliary shuttle gear system.
[0012] Another object of the present disclosure is to provide forward, reverse, and neutral motion gear assembly for vehicle which eliminates extra reverse gear sets from speed gear box of the vehicle.
[0013] Another object of the present disclosure is to provide forward, reverse, and neutral motion gear assembly for vehicle which decreases wheel base of the vehicle.
[0014] Another object of the present disclosure is to provide forward, reverse, and neutral motion gear assembly for vehicle which facilitates wheel base reduction to provide shorter turning radius.
[0015] Another object of the present disclosure is to provide forward, reverse, and neutral motion gear assembly for vehicle which is utilised for providing under drive and over drive mode.
[0016] Another object of the present disclosure is to provide forward, reverse, and neutral motion gear assembly for vehicle which increases power density of the transmission driveline.
[0017] These and other objects of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings.

SUMMARY
[0018] Aspects of the present disclosure relate to a field of a forward, reverse, and neutral motion gear assembly for vehicle. More specifically, it pertains to a compact and cost-effective forward, reverse, and neutral motion gear assembly.
[0019] In an aspect, the present disclosure elaborates upon a forward, reverse, and neutral motion gear assembly for vehicle. The assembly may include a plurality of driving wheels of the vehicle, a differential housing may include an outer surface, a differential shaft (LH+RH) coaxial with the center axis of the differential housing. A set of gears may include a first gear and a second gear. The set of gears may be configured with the outer surface of the differential housing at opposite ends of the differential housing. The set of gears may be adapted to freely rotate coaxially with the differential cage.
[0020] In an aspect, a final drive may be configured between the differential shaft and the plurality of driving wheels to transfer rotary motion to the plurality of driving wheels.
[0021] In an aspect, an input gear for receiving rotary motion from an engine of the vehicle through a gearbox of the vehicle. The input gear may transversally be coupled with the set of gears to rotary motion. Rotation of the input gear may enable free rotation of the first gear in opposite directions with the second gear.
[0022] In an aspect, a shifting device may be configured with the differential housing, and may be adapted to move between a first position, a second position, and a third position, such that the first position may enable coupling of the shifting device with the first gear, the third position may enable coupling of the shifting device with the second gear. The second position may decouple the first gear and the second gear from the shifting device.
[0023] In an aspect, the first position or the third position may enable transfer of rotational motion from the input gear via either the first gear or the second gear through the driveline to the plurality of driving wheels in forward or reverse directions and the second position may disable transfer of rotational motion from the input gear.
[0024] In an embodiment, the final drive set may include a set of bull pinion gears may be coupled with the differential shaft, a set of bull gears may rotatable be in mesh with the bull pinion gears, a set of axle shafts may be coupled between the set of bull gears and the plurality of driving wheels such that the motion from the differential shaft may be transferred to the plurality of driving wheels.
[0025] In an embodiment, the set of bull pinion gears may include a bull pinion LH shaft positioned proximally to the first gear and a bull pinion RH shaft positioned proximally to the second gear.
[0026] In an embodiment, the set of axle shafts may include an axle shaft LH and an axle shaft RH.
[0027] In an embodiment, the plurality of driving wheels may include a driving wheel LH and a driving wheel RH such that the axial shaft LH may rotatable be coupled with the driving wheel LH and the axial shaft RH may be rotatable coupled with the driving wheel RH.
[0028] In an embodiment, the set of bull gears may include a bull gear LH and a bull gear RH such that the bull gear LH may be mounted on the axle shaft LH. The bull gear LH may rotatably be coupled with the bull pinion LH.
[0029] In an embodiment, the bull gear RH may be mounted on the axle shaft RH and is rotatably coupled with the bull pinion RH.
[0030] In an embodiment, the shifting device may include a shifting lever may be configured with a shifting rod. A set of shifting forks may be mounted on the shifting rod. A set of shifting sleeves may be coupled with the set of shifting forks. A set of shifting hubs may be configured with the outer surface of the differential housing
[0031] In an embodiment, movement of the shifting device to the first position may enable coupling of the shifting device with the first gear through the shifting sleeve and the shifting hub. Movement of the shifting device to the third position may enable coupling of the shifting device with the second gear through the shifting sleeve and the shifting hub.
[0032] In an embodiment, movement of the shifting device to the second position may decouple both the first gear and the second gear from the shifting device through the set of shifting sleeves.
[0033] In an embodiment, the final drive may be selected from group including set of cylindrical and similar gears.
[0034] In an embodiment, the set of gears for first gear, second gear and pinion gear may be selected from group including bevel gear, hypoid gear, straight bevel, spiral bevel, and worm gear and likes.
[0035] In an embodiment, the free rotation of the first gear and the second gear against the outer surface of the differential housing may be enabled by mounting the first gear and the second gear at the outer surface to a set of bushes or bearing.
[0036] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[0037] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiment of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0038] FIG. 1 illustrates an exemplary schematic diagram of the driveline in the vehicles as per the existing technology being used in the prior art.
[0039] FIG. 2A illustrates an exemplary schematic embodiment of the proposed forward, reverse, and neutral motion gear assembly for a vehicle, in accordance with an embodiment of the present disclosure.
[0040] FIG. 2B illustrates a schematic embodiment of the proposed forward, reverse, and neutral motion gear assembly for a vehicle with an exemplary embodiment of final driveline accordance with an embodiment of the present disclosure.
[0041] FIG. 2C illustrates an exemplary schematic of the final driveline of the proposed forward, reverse, and neutral motion gear assembly for a vehicle, in accordance with an embodiment of the present disclosure.
[0042] FIG. 3 illustrates a cross sectional view of the proposed forward, reverse, and neutral motion gear assembly for a vehicle in neutral position, in accordance with an embodiment of the present disclosure.
[0043] FIG. 4 illustrates a cross sectional view of the proposed forward, reverse, and neutral motion gear assembly for a vehicle in forward motion, in accordance with an embodiment of the present disclosure.
[0044] FIG. 5 illustrates a cross sectional view of the proposed forward, reverse, and neutral motion gear assembly for a vehicle in reverse motion, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[0045] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such details as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0046] If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[0047] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This disclosure may however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the disclosure, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of housing).
[0048] Various terms as used herein. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0049] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0050] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0051] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.
[0052] Aspects of the present disclosure relate to a field of a forward, reverse, and neutral motion gear assembly for vehicle. More specifically, it pertains to a compact and cost-effective forward, reverse, and neutral motion gear assembly.
[0053] In an aspect, the present disclosure elaborates upon a forward, reverse, and neutral motion gear assembly for vehicle. The assembly can include a plurality of driving wheels of the vehicle, a differential housing can include an outer surface, a differential shaft coaxial with the outer surface of the differential housing. A set of gears can include a first gear and a second gear. The set of gears can be configured with the outer surface of the differential housing at opposite ends of the differential housing. The set of gears can be adapted to freely rotate coaxially with the differential housing.
[0054] In an aspect, a final driveline can be configured between the differential shaft and the plurality of driving wheels to transfer rotary motion to the plurality of driving wheels.
[0055] In an aspect, an input gear for receiving rotary motion from an engine of the vehicle through a gearbox of the vehicle. The input gear can transversally be coupled with the set of gears to rotary motion. Rotation of the input gear can enable free rotation of the first gear in opposite directions with the second gear.
[0056] In an aspect, a shifting device can be configured with the differential housing and can be adapted to move between a first position, a second position, and a third position, such that the first position can enable coupling of the shifting device with the first gear, the third position can enable coupling of the shifting device with the second gear. The second position can decouple the first gear and the second gear in the shifting device.
[0057] In an aspect, the first position or the third position can enable transfer of rotational motion from the input gear via either the first gear or the second gear through the driveline to the plurality of driving wheels in forward or reverse directions and the second position can disable transfer of rotational motion from the input gear.
[0058] In an embodiment, the final driveline can include a set of bull pinion gears can be coupled with the differential shaft, a set of bull gears can rotatable be coupled with the bull pinion gears, a set of axle shafts can be coupled between the set of bull gears and the plurality of driving wheels such that the motion from the differential shaft can be transferred to the plurality of driving wheels.
[0059] In an embodiment, the set of bull pinion gears can include a bull pinion LH positioned proximally to the first gear and a bull pinion RH positioned proximally to the second gear.
[0060] In an embodiment, the set of axle shafts can include an axle shaft LH and an axle shaft RH.
[0061] In an embodiment, the plurality of driving wheels can include a driving wheel LH and a driving wheel RH such that the axial shaft LH can be rotatably coupled with the driving wheel LH and the axial shaft RH can be rotatably coupled with the driving wheel RH.
[0062] In an embodiment, the set of bull gears can include a bull gear LH and a bull gear RH such that the bull gear LH can be mounted on the axle shaft LH. The bull gear LH can rotatably be coupled with the bull pinion LH.
[0063] In an embodiment, the bull gear RH can be mounted on the axle shaft RH and is rotatably coupled with the bull pinion RH.
[0064] In an embodiment, the shifting device can include a shifting lever can be configured with a shifting rod. A set of shifting forks can be mounted on the shifting rod. A set of shifting sleeves can be coupled with the set of shifting forks. A set of shifting hubs can be configured with the outer surface of the differential housing
[0065] In an embodiment, movement of the shifting device to the first position can enable coupling of the shifting device with the first gear through the shifting sleeve and the shifting hub. Movement of the shifting device to the third position can enable coupling of the shifting device with the second gear through the shifting sleeve and the shifting hub.
[0066] In an embodiment, movement of the shifting device to the second position can decouple both the first gear and the second gear from the shifting device through the set of shifting sleeves.
[0067] In an embodiment, the final driveline can be selected from group including set of cylindrical and alike gears.
[0068] In an embodiment, the set of gears can be selected from group including bevel gear, hypoid gear, straight bevel, spiral bevel, and worm gear.
[0069] In an embodiment, the free rotation of the first gear and the second gear against the outer surface of the differential housing can be enabled by mounting the first gear and the second gear at the outer surface to a set of bush or bearing.
[0070] FIG. 2A illustrates an exemplary schematic embodiment of the proposed forward, reverse, and neutral motion gear assembly for a vehicle, in accordance with an embodiment of the present disclosure. FIG. 2B illustrates a schematic embodiment of the proposed forward, reverse, and neutral motion gear assembly for a vehicle with an exemplary embodiment of final driveline, in accordance with an embodiment of the present disclosure. FIG. 2C illustrates an exemplary schematic of the final driveline of the proposed forward, reverse, and neutral motion gear assembly for a vehicle, in accordance with an embodiment of the present disclosure. FIG. 3 illustrates a cross sectional view of the proposed forward, reverse, and neutral motion gear assembly for a vehicle in neutral position, in accordance with an embodiment of the present disclosure.
[0071] In an aspect, a forward, reverse, and neutral motion gear assembly 200 for vehicle can be implemented in transmission driveline of the vehicle for enabling movement of the vehicle in forward direction, reverse direction, and to stay in stationary position. The forward, reverse, and neutral motion gear assembly 200 can eliminate various components including multiple gear sets, shafts, bearings, seals, and other components present in the auxiliary shuttle gear system of the transmission driveline, thereby decreasing overall packaging space and complexity of the transmission. Moreover, the space generated by elimination of the various components can be utilised for providing additional customer value enhancement features. The forward, reverse, and neutral motion gear assembly 200 can include a differential housing 310, a set of gears 304-1, 304-2 (collectively can be referred to as 304, herein), an input gear 302, a shifting device, a final driveline 204, and the likes. The set of gears 304-1, 304-2 can be freely coupled with the differential housing 310. The input gear 302 can be adapted to receive rotary motion from the engine 102 through speed gear box 106 of the vehicle. The input gear 302 can be coupled between the set of gears 304-1, 304-2 for providing rotary motion to the set of gears 304. The shifting device can be configured with the differential housing 310, and the shifting device can be coupled with the set of gears 304-1, 304-2 to provide rotary motion to the set of driving wheels 110-1, 110-2 (collectively can be referred to as 110, herein) through the final driveline 204 of the vehicle. In another embodiment, the shifting device can be decoupled with the set of gears 304-1, 304-2 to disable rotational motion to the set of driving wheels 110-1, 110-2 of the vehicle.
[0072] In an embodiment, the differential housing 310 can include an outer surface 306. In an exemplary embodiment, the outer surface 306 of the differential housing 310 can be configured with splines. The differential housing 310 can be manufactured from material including but not limited to aluminium alloy.
[0073] In an embodiment, the assembly 200 can include a differential shaft 308, which can be configured with the differential housing 310. The differential shaft 308 can be positioned at a centre of the differential housing 310. The differential shaft 308 can include a differential shaft LH and a differential shaft RH. The differential shaft 308 can be positioned coaxially with the outer surface 306 of the differential housing 310. The differential shaft 308 can be manufactured from carbon alloys including steel, chromium, nickel, molybdenum, and the likes.
[0074] In an embodiment, the set of gears 304-1, 304-2 can be configured with the outer surface 306 of the differential housing 310. The set of gears 304-1, 304-2 can be coupled at opposite ends 322-1, 322-2 of the outer surface 306 of the differential housing 310. The opposite ends 322-1, 322-2 can be positioned proximal to ends of the outer surface 306 of the differential housing 310. The set of gears 304 can include a first gear 304-1 and a second gear 304-2. The set of gears 304 can be configured with the engaging means. In an exemplary embodiment, the engaging means can be integral and coaxial with the set of gears 304. In yet another exemplary embodiment, the engaging means can extend from the central annular portion extending in outward direction from centre of the set of gears 304. In yet another embodiment, the engaging means can be provided on the outer surface of the central annular portion extending from the set of gears 304. The engaging means on the set of gears 304 can be selected from group including but not limited to dog splines.
[0075] In an embodiment, the opposite ends 322-1, 322-2 can include a first end 322-1 and a second end 322-2, such that the first gear 304-1 can be rotatably coupled proximal to the first end 322-1 of the outer surface 306 of the differential housing 310 such that rotation of the first gear 304-1 can disable rotary motion transfer to the differential housing 310. The first gear 304-1 can be adapted to freely rotate coaxially with the differential housing 310. In another embodiment, free rotation of the first gear 304-1 against the outer surface 306 of the differential housing 310 can be enabled by the set of bush or bearings between the outer surface 306 and the first gear 304-1. In an exemplary embodiment, the bush and bearings can be selected from group including metallic bush, sleeve bush bearing, flanged bush bearing, split bush bearing, clenched bush bearing, and the likes. The first gear 304-1 can include but not limited to spiral gear, hypoid gear, bevel gear, helical gear, straight bevel, and the likes.
[0076] In an embodiment, the second gear 304-2 can be configured at the outer surface 306 of the differential housing 310. The second gear 304-2 can be freely coupled to the second end 322-2 of the outer surface 306 of the differential housing 310 such that rotation of the second gear 304-2 can disable rotary motion transfer to the differential housing 310. In another embodiment, the free rotation of the second gear 304-2 against the outer surface 306 of the differential housing 310 can be enabled by mounting a set of bush or bearings between the outer surface 306 and the second gear 304-2. In an exemplary embodiment, the set of bush and bearings can be selected from group including metallic bush, sleeve bush bearing, flanged bush bearing, split bush bearing, clenched bush bearing, and the likes. The second gear 304-2 can be positioned coaxially with the differential housing 310. The second gear 304-2 can include but not limited to spiral gear, hypoid gear, bevel gear, helical gear, straight bevel, and face gear.
[0077] In an embodiment, an input gear 302 can be rotatably coupled between the set of gears 304. In another embodiment, the input gear 302 can be rotatably coupled between the first gear 304-1 and the second gear 304-2. In yet another embodiment, an axis of the input gear 302 can be configured between axes of the first gear 304-1 and the second gear 304-2 at right angle. The input gear 302 can be adapted to receive rotary motion from the engine 102 of the vehicle through a speed gear box 106 of the vehicle. The rotary motion of the input gear 302 can enable rotation of the first gear 304-1 and the second gear 304-2 in opposite direction to each other. The rotary motion of the first gear 304-1 can be in direction opposite to the second gear 304-2. In an exemplary embodiment, if the input gear 302 can rotate the first gear 304-1 in clockwise direction, then the input gear 302 can enable rotation of the second gear 304-2 in an anti-clockwise direction.
[0078] In an embodiment, the final driveline 204 can be configured between the differential shaft 308 and the set of driving wheels 110-1, 110-2 of the vehicle to provide rotary motion to the set of driving wheels 110-1, 110-2. The final driveline 204 can include a set of pinion gears 206-1, 206-2 (collectively can be referred as 206, herein), a set of axle shafts 210-1, 210-2 (collectively can be referred as 210, herein), a set of bull gears 208-1, 208-2 (collectively can be referred as 208, herein), such that the final driveline 204 can enable transmission of rotary motion from the differential shaft 308 to the set of driving wheels 110-1, 110-2.
[0079] In an embodiment, the set of pinion gears 206 can be rotatably coupled with the differential shaft 308. A rotary motion of the differential shaft 308 can enable corresponding rotary motion of the set of pinion gears 206. The set of pinion gears 206 can include a pinion gear LH 206-1 and a pinion gear RH 206-2. The pinion gear LH 206-1 can be coupled with the differential shaft 308 and the pinion gear LH 206-1 can be positioned in-line with the first gear 304-1. The pinion gear RH 206-2 can be coupled with the differential shaft 308 and the pinion gear RH 206-2 can be positioned in line with the second gear 304-2. In an exemplary embodiment, the set of pinion gears 206 can be selected from spur gears.
[0080] In an embodiment, the set of axle shafts 210 can be coupled with the set of driving wheels 110 and can be configured with the set of bull gears 208. The set of axle shafts 210 can include an axle shaft LH 210-1 and axle shaft RH 210-2. In an embodiment, the set of driving wheels 110 can include a driving wheel LH 110-1 and driving wheel RH 110-2. The axle shaft LH 210-1 can be coupled with the bull gear LH 208-1 and can be configured with the driving wheel LH 110-1. The axle shaft RH 210-2 can be coupled with the bull gear RH 208-2, and can be configured with the driving wheel RH 110-2.
[0081] In an embodiment, the set of bull gears 208 can be rotatably coupled with the set of pinion gears 206 and can be configured with the set of axle shafts 210. The rotary motion of the set of bull gears 208 can be in opposite direction with respect to rotary motion of the set of pinion gears 206. In an exemplary embodiment, if the set of pinion gears 206 can rotate in a clockwise direction, which enables the set of bull gears 208 to rotate in an anticlockwise direction. The set of bull gears 208 can include a bull gear LH 208-1 and a bull gear RH 208-2. The bull gear LH 208-1 can rotatably be coupled with the pinion gear LH 206-1 and can be configured with the axle shaft LH 210-1 such that the rotatable motion from the pinion gear LH 206-1 can be transferred to the set of driving wheel 110 through the bull gear LH 208-1 and the axle shaft LH 210-1. The bull gear RH 208-2 can be rotatably coupled with the pinion gear RH 206-2 and can be configured with the axle shaft RH 208-2 such that the rotatable motion from pinion gear RH 206-2 can be transferred to the set of driving wheel 110 through the bull gear RH 208-2 and the axle shaft RH 210-2.
[0082] In an embodiment, the shifting device can be configured with the differential housing 310. In an embodiment, the shifting device can be positioned proximal to the set of gears 304. The shifting device can be adapted to move in a first position, a second position, and a third position. The first position of the shifting device can enable coupling of the shifting device with the first gear 304-1, such that the first position can enable transferring of rotary motion from the input gear 302 via the first gear 304-1 through the final driveline 204 to the set of driving wheels 110. The second position of the shifting device can be decoupled with the set of gears 304, such that the second position can disable transfer of rotary motion from the input gear 302 to achieve neutral position. In an exemplary embodiment, the second position can disable rotary motion of the set of driving wheels 110. The third position can enable coupling of the shifting device with the second gear 304-2, such that the third position can enable transferring of rotational motion from the input gear 302 via the second gear 304-2 through the final driveline 204 to the set of driving wheels 110.
[0083] In an embodiment, the shifting device can include a shifting lever 320, a shifting rod 318, a set of shifting forks 316-1, 316-2 (collectively can be referred to as 316, herein), a set of shifting sleeves 314-1, 314-2 (collectively can be referred to as 314, herein), a set of shifting hubs 312-1, 312-2 (collectively can be referred to as 312, herein), and the likes. The set of shifting hubs 312 can be coupled with the outer surface 306 of the differential housing 310. The set of shifting hubs 312 can be positioned proximally to the set of gears 304. The set of shifting hubs 312 can include a shifting hub LH 312-1 and shifting hub RH 312-2. The shifting hub LH 312-1 can be positioned proximally to the first gear 304-1. The shifting hub RH 312-2 can be positioned proximally to the second gear 304-2. The set of shifting hubs 312 can be configured with the engaging means. In another embodiment, the engaging means of the set of shifting hubs 312 can be configured on an outer surface of the set of shifting hubs 312. The engaging means of the set of shifting hubs 312 can include but not limited to splines.
[0084] In an embodiment, the set of shifting sleeves 314 can be slidably configured with the set of shifting hubs 312 and the set of gears 304. The set of shifting sleeves 314 can be slided over the set of shifting hubs 312 and the set of gears 304. The set of shifting sleeves 314 can include a shifting sleeve LH 314-1 and shifting sleeve RH 314-2. The shifting sleeve LH 314-1 can be slidably coupled with the shifting hub LH 312-1 such that the shifting sleeve LH 314-1 can be slided from the shifting hub LH 312-1 to the first gear 304-1 or vice versa. The shifting sleeve RH 314-2 can be slidably coupled with the shifting hub RH 312-2 such that the shifting sleeve RH 314-2 can be slided from the shifting hub RH 312-2 to the second gear 304-2 or vice versa. In an embodiment, the set of shifting sleeves 314 can be adapted to provide engaging means which can be adapted to engage with the engaging means of the set of shifting hubs 312 and the engaging means of the set of gears 304 during sliding movement. In another embodiment, the engaging means of the set of shifting sleeves 314 can be configured with the central annular portion of set of shifting sleeves 314. The engaging means of the set of shifting sleeves 314 can include but not limited to splines.
[0085] In an embodiment, the set of shifting forks 316 can be mechanically coupled with the set of shifting sleeves 314 such that the set of shifting forks 316 enables sliding movement of the set of shifting sleeves 314. The set of shifting forks 316 can include a shifting fork LH 316-1 and shifting fork RH 316-2. The shifting fork LH 316-1 can be coupled with the shifting sleeve LH 314-1 to enable sliding movement of the shifting sleeve LH 314-1 between the shifting hub LH 312-1 and the first gear 304-1. The shifting fork RH 316-2 can be coupled with the shifting sleeve RH 314-2 to enable sliding movement of the shifting sleeve RH 314-2 between the shifting hub RH 312-2 and the second gear 304-2.
[0086] In an embodiment, the shifting rod 318 can be coupled with the set of shifting forks 316 such that movement of the shifting rod 318 enables movement of the set of shifting forks. In another embodiment, the shifting rod 318 can be coupled with the shifting fork LH 316-1 and shifting fork RH 316-2. In an exemplary embodiment, the shifting rod 318 can be transversely coupled with the set of shifting forks 316.
[0087] In an embodiment, the shifting lever 320 can be configured with the shifting rod 318. The shifting lever 320 can be operated through the first position, second position, and third position. The shifting lever 320 can be operated by an operator for operating the vehicle in forward, reverse and neutral position. The shifting lever 320 can be positioned ergonomically in the vehicle such that the operator can operate the shifting lever 320 with ease.
[0088] In an embodiment, operating the shifting lever 320 can enable movement of the shifting rod 318 in longitudinal direction. The movement of the shifting rod 318 can enable movement of the set of shifting forks 316. The longitudinal movement of the set of shifting forks 316 can enable sliding movement of the set of the shifting sleeves 316 over the set of shifting hubs 312 and the set of gears 304. The sliding movement of the set of shifting sleeves 316 can enable positioning of the set of shifting sleeves 316 partly on the set of hubs 312 and either of the sets of gears 304, thereby transmitting rotary motion from either of the set of gears 304 through the engaging means of either of the set of gears 304 via the engaging means of the shifting hubs 312 and the engaging means of the shifting forks 314 to the set of driving wheels 110 through the final driveline 204.
[0089] In an exemplary embodiment, the input gear 302 can be adapted to receive clockwise rotary movement from the engine 102. Due to clockwise rotary motion of the input gear 302 can enable clockwise rotary movement of the first gear 304-1, and an anticlockwise rotary movement of the second gear 304-2. Operating the shifting lever 320 can enable shifting sleeve LH 314-1 to slide over the shifting hub LH 312-1 towards the first gear 304-1 thereby engaging the first gear 304-1 to enable motion transfer. The clockwise rotary movement of the first gear 304-1 can enable clockwise rotary movement of the differential shaft 308, which in turn enables clockwise rotary movement of the pinion gear LH 206-1. The clockwise rotary movement of the pinion gear LH 206-1 can in turn enable anticlockwise rotary movement of the bull gear LH 208-1, thereby enabling anticlockwise movement of the set of axle shafts 210. This enables anticlockwise movement of the set of the driving wheels 110.
[0090] In another exemplary embodiment, the input gear can be adapted to receive clockwise rotary movement from the engine 102. This in turn can freely rotate the first gear 312-1 in clockwise direction and can simultaneously freely rotate the second gear 304-2 in anti-clockwise direction. Operating the shifting lever 320 in neutral position can disable engagement of the set of gear 304 thereby allowing continuous free rotation of the set of gears 304 and preventing motion transfer from the input gear 302 to the set of driving wheels 110. This enables neutral position of the vehicle.
[0091] FIG. 4 illustrates a cross sectional view of the proposed forward, reverse, and neutral motion gear assembly for a vehicle in forward motion, in accordance with an embodiment of the present disclosure.
[0092] In an embodiment, the input gear 302 can be adapted to receive clockwise rotary movement from the engine 102. Due to clockwise rotary motion of the input gear 302 can enable clockwise rotary movement of the first gear 304-1, and an anticlockwise rotary movement of the second gear 304-2. Operating the shifting lever 320 in forward position can enable shifting sleeve LH 314-1 to slide over the shifting hub LH 312-1 towards the first gear 304-1 thereby engaging the first gear 304-1 to enable motion transfer. The clockwise rotary movement of the first gear 304-1 can enable clockwise rotary movement of the differential shaft 308, which in turn enables clockwise rotary movement of the pinion gear LH 206-1. The clockwise rotary movement of the pinion gear LH 206-1 can in turn enable anticlockwise rotary movement of the bull gear LH 208-1, thereby enabling anticlockwise movement of the set of axle shafts 210. This enables anticlockwise movement of the set of the driving wheels 110. This enables motion in forward direction of the vehicle.
[0093] FIG. 5 illustrates a cross sectional view of the proposed forward, reverse, and neutral motion gear assembly for a vehicle in reverse motion, in accordance with an embodiment of the present disclosure.
[0094] In an embodiment, the input gear 302 can be adapted to receive clockwise rotary movement from the engine 102. Due to clockwise rotary motion of the input gear 302 can enable anticlockwise rotary movement of the second gear 304-2, and a clockwise rotary movement of the first gear 304-1. Operating the shifting lever 320 in reverse position can enable shifting sleeve RH 314-2 to slide over the shifting hub RH 312-2 towards the second gear 304-2 thereby engaging the second gear 304-2 to enable motion transfer. The anticlockwise rotary movement of the second gear 304-2 can enable anticlockwise rotary movement of the differential shaft 308, which in turn enables anticlockwise rotary movement of the pinion gear RH 206-2. The anticlockwise rotary movement of the pinion gear RH 206-2 can in turn enable clockwise rotary movement of the bull gear RH 208-2, thereby enabling clockwise movement of the set of axle shafts 210. This enables clockwise movement of the set of the driving wheels 110. This enables motion in reverse direction of the vehicle.
[0095] It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. The inventive subject matter, therefore, is not to be restricted except in the spirit of the appended claims. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refers to at least one of something selected from the group consisting of A, B, C ….and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc. The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the appended claims.
[0096] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[0097] The present disclosure provides a compact and a cost-effective solution for eliminating the auxiliary shuttle gear system and thereby decreasing overall packaging space and reducing complexity and overall cost of the vehicle.
[0098] The present disclosure provides a forward, reverse, and neutral motion gear assembly for vehicle.
[0099] The present disclosure provides a forward, reverse, and neutral motion gear assembly for vehicle by eliminating various components involved in the auxiliary shuttle gear system.
[00100] The present disclosure provides a forward, reverse, and neutral motion gear assembly for vehicle which eliminates extra reverse gear sets from speed gear box of the vehicle.
[00101] The present disclosure provides a forward, reverse, and neutral motion gear assembly for vehicle which decreases wheel base of the vehicle.
[00102] The present disclosure provides a forward, reverse, and neutral motion gear assembly for vehicle which facilitates shorter turning radius.
[00103] The present disclosure provides a forward, reverse, and neutral motion gear assembly for vehicle which is utilised for providing additional features and thereby enhancing value proposition of the working vehicle.
[00104] The present disclosure provides a forward, reverse, and neutral motion gear assembly for vehicle which is utilised for providing under drive and over drive mode.
[00105] The present disclosure provides a forward, reverse, and neutral motion gear assembly for vehicle which increases power density of the transmission driveline.
, Claims:WE CLAIM:
1. A forward, reverse, and neutral motion gear assembly (200) for a vehicle, wherein the forward, reverse, and neutral motion gear assembly (200) comprises:
a set of driving wheels (110-1, 110-2) of the vehicle;
a differential housing (310) comprising an outer surface (306) and a differential shaft (308) coaxial with the outer surface (306) of the differential housing (308);
a set of gears (304-1, 304-2) comprising a first gear (304-1) and a second gear (304-2) configured with the outer surface (306) of the differential housing (308) at opposite ends of the differential housing (310) and adapted to freely rotate coaxially with the differential housing (310);
an input gear (302), receiving rotary motion from the vehicle engine via vehicle gearbox, transversally coupled with the set of gears (304-1, 304-2) and capable of the rotary motion transfer, wherein rotation of the input gear (302) enables free rotation of the first gear (304-1) and the second gear (304-2) in directions opposite to each other;
a final driveline (204) configured between the differential shaft (308) and the set of wheels (110-1, 110-2) to transfer the rotary motion to the set of wheels (110-1, 110-2);
a shifting device configured with the differential housing (310), and is adapted to move between a first position, a second position, and a third position, such that the first position enables coupling of the shifting device with the first gear (304-1), the third position enables coupling of the shifting device with the second gear (304-2), the second position decouples both the first gear (304-1) and the second gear (304-2) from the shifting device,
wherein the first position or the third position enables transfer of rotational motion from the input gear (302) via either first gear (304-1) or the second gear (304-2) through the final driveline to the set of driving wheels (110-1, 110-2) in forward or reverse directions and the second position disables transfer of rotational motion from the input gear (302) to achieve neutral position.

2. A forward, reverse, and neutral motion gear assembly (200) for a vehicle as claimed in claim 1, wherein the final driveline (204) comprises a set of pinion gears (206-1, 206-2) coupled with the differential shaft (308), a set of bull gears (208-1, 208-2) rotatably coupled with the pinion gears (206-1, 206-2), a set of axle shafts (210-1, 210-2) coupled between the set of bull gears (208-1, 208-2) and the set of driving wheels (110-1, 110-2) such that the motion from the differential shaft (308) is transferred to the set of driving wheels (110-1, 110-2).

3. A forward, reverse, and neutral motion gear assembly (200) for a vehicle as claimed in claim 2, wherein the set of pinion gears (206-1, 206-2) comprises a pinion LH (206-1) positioned proximally to the first gear (304-1) and a pinion RH (206-2) positioned proximally to the second gear (304-2).

4. A forward, reverse, and neutral motion gear assembly (200) for a vehicle as claimed in claim 2, wherein the set of axle shafts (210-1, 210-2) comprises an axle shaft LH (210-1) and an axle shaft RH (210-2), the set of driving wheels (110-1, 110-2) comprises a driving wheel LH (110-1) and a driving wheel RH (110-2) such that the axial shaft LH (210-1) is rotatably coupled with the driving wheel LH (110-1) and the axial shaft RH (210-2) is rotatably coupled with the driving wheel RH (110-2).

5. A forward, reverse, and neutral motion gear assembly (200) for a vehicle as claimed in claim 2, wherein the set of bull gears (208-1, 208-2) comprises a bull gear LH (208-1) and a bull gear RH (208-2) such that the bull gear LH (208-1) is mounted on the axle shaft LH (210-1) and is rotatably coupled with the pinion LH (206-1), and the bull gear RH (208-2) is mounted on the axle shaft RH (210-2) and is rotatably coupled with the pinion RH (206-2).
6. A forward, reverse, and neutral motion gear assembly (200) for a vehicle as claimed in claim 1, wherein the shifting device comprises
a shifting lever (320) configured with a shifting rod (318),
a set of shifting forks (316-1, 316-2) mounted on the shifting rod (318),
a set of shifting sleeves (314-1, 314-2) coupled with the set of shifting forks (316-1, 316-2), and
a set of shifting hubs (312-1, 312-2) configured with the outer surface (306) of the differential housing (310), and
movement of the shifting device (320) to the first position enables coupling of the shifting device (320) with the first gear (304-1) through the set of shifting sleeves (314-1, 314-2) and the set of shifting hubs (312-1, 312-2), movement of the shifting device (320) to the third position enables coupling of the shifting device (320) with the second gear (304-2) through the set of shifting sleeves (314-1, 314-2) and the set of shifting hubs (312-1, 312-2), movement of the shifting device to the second position decouples both the first gear (304-1) and the second gear (304-2) from the shifting device (320) through the set of shifting sleeves (314-1, 314-2).

7. A forward, reverse, and neutral motion gear assembly (200) for a vehicle as claimed in claim 1, wherein the free rotation of the first gear (304-1) and the second gear (304-2) against the outer surface (306) of the differential housing (310) is enabled by mounting the first gear (304-1) and the second gear (304-2) at the outer surface (306) to a set of bushes or bearing.

8. A forward, reverse, and neutral motion gear assembly (200) for a vehicle as claimed in claim 1, wherein the set of gears (304-1, 304-2) is selected from group comprising bevel gear, hypoid gear, straight bevel, spiral bevel, and worm gear.

9. A forward, reverse, and neutral motion gear assembly (200) for a vehicle as claimed in claim 1, wherein the final driveline (204) is selected from group comprising set of spur gears, and set of planetary gears.