Transmission and all-terrain vehicle using the same

Abstract

This application discloses a transmission device and an all-terrain vehicle using the transmission device. The transmission device includes a housing, an input shaft, a drive shaft, a linkage assembly, and a shifting assembly. The input shaft is rotatably inserted into the housing, with its two ends being an input end and an output end, respectively. The drive shaft is rotatably inserted into the housing and coaxial with the input shaft. The end of the drive shaft closest to the input shaft is the drive end, the outer peripheral wall of the output end is provided with a first spline, and the outer peripheral wall of the drive end is provided with a second spline. The linkage assembly includes a linkage sleeve, which is slidably fitted on the outside of the output end and the drive end. The linkage sleeve is slidably connected to the first spline and the second spline. The linkage assembly also includes a sliding sleeve and a buffer elastic element, with both ends of the buffer elastic element connected to the sliding sleeve and the linkage sleeve, respectively. The shifting assembly is connected to the sliding sleeve and is used to drive the sliding sleeve to slide, so that the buffer elastic element drives the linkage sleeve to separate from the second spline. This transmission device has good power disconnection smoothness and a long service life.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a transmission device and an all-terrain vehicle using the transmission device. Background Technology

[0002] Currently, in all-terrain vehicles and off-road vehicles, power is output from the engine and then transmitted through the transmission to the reduction gearbox. The reduction gearbox then distributes the power to the drive axles of the running gear system. In some usage scenarios, it is necessary to disconnect the power between the reduction gearbox and the front or rear drive axles, such as when the vehicle is switching from four-wheel drive to two-wheel drive, or when the vehicle breaks down and requires towing. To protect the transmission, the power to the drive axle corresponding to the wheel in contact with the ground needs to be disconnected. Therefore, vehicles requiring power disconnection are usually equipped with a power disconnection mechanism to disconnect or connect the power between the reduction gearbox and the corresponding drive axle.

[0003] Current power disconnect mechanisms typically include two drive shafts, an actuating assembly, and a coupling sleeve. The two drive shafts are connected to a reduction gearbox and a corresponding drive axle, respectively. The coupling sleeve is slidably fitted onto the proximal ends of the two drive shafts, engaging with them. The actuating assembly is directly connected to the coupling sleeve. By moving the coupling sleeve, the actuating assembly connects or disconnects the coupling sleeve from the drive shaft connected to the drive axle, thus disconnecting or connecting the reduction gearbox and the corresponding drive axle. However, when the vehicle is stationary, the coupling sleeve and drive shaft are usually tightly engaged. Using the actuating assembly to move the coupling sleeve can easily cause jamming, resulting in poor smoothness of power disconnection. Furthermore, forcibly moving the coupling sleeve using the actuating assembly can easily cause wear and even damage to the coupling sleeve and drive shaft, thus affecting the service life of the power disconnect mechanism. Summary of the Invention

[0004] In view of this, this application provides a transmission device and an all-terrain vehicle using the transmission device, wherein the transmission device has good power disconnection smoothness and long service life.

[0005] One embodiment of this application provides a transmission device, including a housing, an input shaft, a transmission shaft, a linkage assembly, and a toggle assembly. The input shaft is rotatably inserted into the housing, with its two ends being an input end and an output end, respectively. The input end is located outside the housing, and the output end is located inside the housing. The outer peripheral wall of the output end is provided with a first spline. The transmission shaft is rotatably inserted into the housing and coaxially arranged with the input shaft. The end of the transmission shaft near the input shaft is the transmission end, and the outer peripheral wall of the transmission end is provided with a second spline. The linkage assembly includes a linkage sleeve, which is sleeved on the outside of the output end and the transmission end. The linkage sleeve has a first direction parallel to the axial direction of the input shaft and pointing from the transmission shaft to the input shaft, and a second direction opposite to the first direction. The linkage sleeve can move along the first direction... The linkage sleeve slides relative to the output end and the transmission end in either the first or second direction; the linkage sleeve is slidably connected to the first spline, and the linkage sleeve can be slidably connected to or separated from the second spline; when the linkage sleeve is slidably connected to the second spline, the input shaft, the transmission shaft, and the linkage sleeve can rotate synchronously around the axis of the input shaft; the actuating component can apply force to the linkage sleeve to drive the linkage sleeve to slide along the first direction; the linkage component also includes a sliding sleeve and a buffer elastic element, the sliding sleeve can slide relative to the linkage sleeve along the axial direction of the input shaft, the two ends of the buffer elastic element are respectively connected to the sliding sleeve and the linkage sleeve, the actuating component is connected to the sliding sleeve, and the actuating component is used to drive the sliding sleeve to slide along the first direction so that the buffer elastic element drives the linkage sleeve to separate from the second spline.

[0006] In some embodiments, the sliding sleeve has an inner hole and multiple sliding grooves, the inner hole extends axially along the input shaft, the linkage sleeve is slidably inserted into the inner hole, the multiple sliding grooves are circumferentially spaced along the sliding sleeve, and each of the multiple sliding grooves extends axially along the input shaft. Each sliding groove communicates with the inner hole and also communicates with the end of the sliding sleeve away from the input end. The outer peripheral wall of the linkage sleeve has multiple sliding protrusions, the multiple sliding protrusions are circumferentially spaced along the linkage sleeve, and each of the multiple sliding protrusions extends axially along the input shaft. The multiple sliding protrusions are slidably disposed in the multiple sliding grooves. The buffer elastic element is sleeved on the outer periphery of the sliding sleeve, one end of the buffer elastic element is connected to the end of the sliding sleeve away from the input end, and the other end of the buffer elastic element is connected to the end of the linkage sleeve near the input end.

[0007] In some embodiments, the outer peripheral wall of the sliding sleeve at the end away from the input end is provided with a plurality of engaging grooves, and the plurality of engaging grooves and the plurality of sliding grooves are arranged alternately along the circumference of the sliding sleeve; the sliding protrusions at the ends near the input end are each provided with engaging slots, and the plurality of engaging slots are arranged along the circumference of the linkage sleeve; the linkage component further includes a first stop and a second stop, the first stop engaging with the plurality of engaging grooves, the plurality of engaging grooves being able to restrict the first stop from sliding relative to the engaging grooves along the axial direction of the input shaft, the second stop engaging with the plurality of engaging slots, the plurality of engaging slots being able to restrict the second stop from sliding relative to the engaging slots along the axial direction of the input shaft, and the buffer elastic member abutting between the first stop and the second stop.

[0008] In some embodiments, the linkage assembly further includes a reset elastic element, which is sleeved on the input shaft and located on the side of the linkage sleeve facing the input end. One end of the reset elastic element is connected to the linkage sleeve, and the other end of the reset elastic element is connected to the input shaft. The reset elastic element is at least able to provide a force to the linkage sleeve in the second direction.

[0009] In some embodiments, the linkage sleeve has a through hole extending along the axis of the input shaft, with both the output end and the transmission end located within the through hole. The through hole includes a connecting section and a positioning section. The connecting section is located on the side of the positioning section facing the input end, and a keyway is formed on the inner wall of the connecting section. The keyway is slidably connected to a first spline and can be slidably connected to or separated from a second spline. A positioning boss is provided on the outer peripheral wall of the transmission end. The positioning boss is located on the side of the second spline away from the input end and is slidably engaged with the positioning section. When the keyway is separated from the second spline, the positioning boss supports the linkage sleeve radially to restrict the linkage sleeve from moving radially relative to the positioning boss. When the positioning boss abuts against the second spline, the positioning boss can restrict the linkage sleeve from moving in a second direction, the keyway is slidably connected to the second spline, and the actuating component separates from the sliding sleeve axially along the input shaft.

[0010] In some embodiments, the outer peripheral wall of the sliding sleeve near the input end is provided with a stop protrusion, and the actuating component extends to the side of the stop protrusion away from the input end. The actuating component is used to push the stop protrusion to move along the first direction so that the sliding sleeve slides along the first direction.

[0011] In some embodiments, the actuation assembly includes a rocker arm, a shift shaft, a shift fork, and a return elastic member. The shift shaft is rotatably inserted into the housing, and the extension direction of the shift shaft is perpendicular to the extension direction of the input shaft. The rocker arm is connected to one end of the shift shaft located outside the housing, and the rocker arm is used to drive the shift shaft to rotate around its own axis. The shift fork is connected to the portion of the shift shaft located inside the housing. The end of the shift fork away from the shift shaft has two actuating parts, which are spaced apart along the axial direction of the shift shaft. The two actuating parts extend to the side of the stop protrusion away from the input end, and the two actuating parts are used to push the stop protrusion to move along the first direction. The return elastic member is sleeved on the shift shaft and located outside the housing. The two ends of the return elastic member are respectively connected to the rocker arm and the housing. The return elastic member is used to drive the shift shaft and the shift fork to rotate so that the shift fork returns to its original position. When the shift fork returns to its original position, the two actuating parts move away from the stop protrusion along the second direction.

[0012] In some embodiments, the shift fork further includes a connecting portion connected to the portion of the shift shaft located within the housing, and both actuating portions are connected to the connecting portion; the inner wall of the housing has two limiting surfaces, which are spaced apart along the axial direction of the shift shaft, and are used to abut and limit the connecting portion from both sides, so that the two actuating portions remain in a non-contact state with the outer peripheral wall of the sliding sleeve along the axial direction of the shift shaft.

[0013] In some embodiments, the shift fork further has an abutment boss, which is disposed at one end of any of the shifting parts near the shift shaft. The inner wall of the housing is provided with a limiting boss, which is located on the moving path of the abutment boss. The limiting boss is used to abut against and limit the abutment boss, so as to restrict the return elastic member from driving the shift shaft and the shift fork to rotate so that the shift fork rotates more than a preset angle when it returns to its original position.

[0014] One embodiment of this application also provides an all-terrain vehicle, including a frame, a body panel, a running gear, a power system, and a transmission device as described in any of the above embodiments; the body panel at least covers the frame; the running gear is at least partially located below the frame; the power system is supported by the frame and is drive-connected to the running gear; the input shaft is drive-connected to the power system, and the drive shaft is drive-connected to the running gear.

[0015] The transmission device in this embodiment of the application, by incorporating a sliding sleeve and a buffer elastic element, allows the actuating component to provide a continuous elastic force through the buffer elastic element when it is necessary to disconnect the power between the power system and the travel system, regardless of the tightness of the engagement between the linkage sleeve and the second spline. This ensures that if the engagement between the linkage sleeve and the second spline becomes loose, the linkage sleeve can slide along the first direction immediately, disconnecting the transmission connection between the linkage sleeve and the drive shaft without any jamming, thus improving the smoothness of disconnecting the power from the travel system. Furthermore, because the sliding sleeve and the linkage sleeve are buffered by the buffer elastic element, the actuating component does not forcibly move the linkage sleeve when it moves the sliding sleeve along the first direction. This reduces the probability of damage to the actuating component, the linkage sleeve, and the second spline, reduces wear between the linkage sleeve and the second spline, and ultimately improves the service life of the transmission device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the transmission device and the rear axle housing provided in an embodiment of this application.

[0017] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the transmission device and rear axle housing along the AA direction.

[0018] Figure 3 yes Figure 1 The diagram shows a three-dimensional structural representation of the transmission device in which the linkage sleeve, sliding sleeve, buffer elastic element, first stop element, and second stop element work together.

[0019] Figure 4 yes Figure 3 An exploded view of the linkage sleeve and sliding sleeve in the diagram.

[0020] Figure 5 yes Figure 3 The schematic cross-sectional view of the linkage sleeve, sliding sleeve, buffer elastic element, first stop element and second stop element along the BB direction is shown.

[0021] Figure 6 yes Figure 1 The diagram shows a cross-sectional view of the transmission device and rear axle housing along the CC direction.

[0022] Figure 7 yes Figure 1 A three-dimensional structural diagram of the housing in the transmission device is shown.

[0023] Figure 8 yes Figure 6 The diagram shows a three-dimensional structure of the shift fork.

[0024] Figure 9 This is a three-dimensional structural schematic diagram of an all-terrain vehicle provided in an embodiment of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0026] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0028] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] Please see Figure 1 and Figure 9 One embodiment of this application provides a transmission device 10 applied to an all-terrain vehicle 100. The all-terrain vehicle 100, as a versatile tool, can travel normally on various terrains such as beaches, hillsides, and deserts. The all-terrain vehicle 100 includes a running gear 40 and a power system (not shown). The transmission device 10 is used to disconnect and connect the power transmission between the running gear 40 and the power system. Of course, in other embodiments, the transmission device 10 can also be applied to other types of vehicles such as off-road vehicles, and its use on other types of vehicles is the same as its use on the all-terrain vehicle 100. Clearly, applying the transmission device 10 to the all-terrain vehicle 100 does not constitute a limitation on the embodiments of this application.

[0030] Please see Figure 1 and Figure 9In some embodiments, the all-terrain vehicle 100 further includes a frame 20 and a body panel 30. The frame 20 serves as the skeleton of the all-terrain vehicle 100, supporting and connecting the various components of the all-terrain vehicle 100 and bearing various loads from inside and outside the vehicle. The body panel 30 at least covers the frame 20. The running gear 40 is at least partially located below the frame 20. One end of the transmission 10 is connected to the power system, and the other end of the transmission 10 is connected to the running gear 40. The transmission 10 can transmit power generated by the power system to the running gear 40, and the transmission 10 can also disconnect the power generated by the power system between the power system and the running gear 40.

[0031] In some embodiments, the power system includes an engine (not shown), a transmission (not shown), and a reduction gearbox (not shown). The engine, transmission, and reduction gearbox are all mounted on the frame 20. The transmission is driven by the engine, the transmission is driven by the reduction gearbox, and the transmission device 10 is driven by the reduction gearbox. When the all-terrain vehicle 100 is in motion, the engine outputs power and transmits the power to the transmission, the transmission transmits the power to the reduction gearbox, the reduction gearbox transmits the power to the transmission device 10, and the transmission device 10 transmits the power to the running gear 40. The running gear 40 drives the frame 20 to move, thereby moving the all-terrain vehicle 100 as a whole.

[0032] In some embodiments, the walking system 40 includes a front drive axle 41, a rear drive axle 42, and a plurality of wheels 43. The front drive axle 41 and the rear drive axle 42 are both connected to the frame 20. The front drive axle 41 and the rear drive axle 42 are spaced apart along the length of the all-terrain vehicle 100. The plurality of wheels 43 are respectively connected to the front drive axle 41 and the rear drive axle 42. The transmission device 10 is connected to the rear drive axle 42, thereby transmitting the power generated by the power system to the rear drive axle 42, causing the rear drive axle 42 to drive the wheels 43 connected to it to rotate, thereby causing the all-terrain vehicle 100 to move in a rear-wheel drive manner.

[0033] Understandably, in some other embodiments, when the all-terrain vehicle 100 moves in front-wheel drive mode, the transmission device 10 is connected to the front drive axle 41, thereby transmitting the power generated by the power system to the front drive axle 41, causing the front drive axle 41 to drive the wheels 43 connected to it to rotate. When the all-terrain vehicle 100 moves in four-wheel drive mode, two transmission devices 10 may also be provided, with the two transmission devices 10 respectively connected to the front drive axle 41 and the rear drive axle 42, thereby transmitting the power generated by the power system to the front drive axle 41 and the rear drive axle 42 respectively, causing the front drive axle 41 and the rear drive axle 42 to drive the wheels 43 connected to them to rotate respectively.

[0034] Please see Figure 1 and Figure 2In some embodiments, the transmission device 10 includes a housing 11, an input shaft 12, a transmission shaft 13, a linkage assembly 14, and a toggle assembly 15. The input shaft 12 is rotatably inserted into the housing 11, and its axis is a first axis 121. The two ends of the input shaft 12 are an input end 122 and an output end 123, respectively. The input end 122 is located outside the housing 11 and is connected to the power system for transmission. The output end 123 is located inside the housing 11. The transmission shaft 13 is rotatably inserted into the housing 11 and is coaxially arranged with the input shaft 12. The end of the transmission shaft 13 closest to the input shaft 12 is the transmission end 131, and the end of the transmission shaft 13 furthest from the input shaft 12 is connected to the walking system 40 for transmission. The outer peripheral wall of the output end 123 is provided with a first spline 1231, and the outer peripheral wall of the transmission end 131 is provided with a second spline 1311. Both the first spline 1231 and the second spline 1311 extend along the axial direction of the input shaft 12.

[0035] The linkage assembly 14 includes a linkage sleeve 141, a sliding sleeve 142, and a buffer elastic element 143. The linkage sleeve 141 is sleeved on the outside of the output end 123 and the transmission end 131. The linkage sleeve 141 has a first direction F1 and a second direction F2. The linkage sleeve 141 can slide relative to the output end 123 and the transmission end 131 along the first direction F1 or the second direction F2. The first direction F1 is parallel to the axial direction of the input shaft 12 and points from the transmission shaft 13 to the input shaft 12. The second direction F2 is opposite to the first direction F1. The linkage sleeve 141 is slidably connected to the first spline 1231. The linkage sleeve 141 can be slidably connected to or separated from the second spline 1311. When the linkage sleeve 141 is slidably connected to the second spline 1311, the input shaft 12, the transmission shaft 13, and the linkage sleeve 141 can rotate synchronously around the first axis 121. The sliding sleeve 142 can slide relative to the linkage sleeve 141 along the axial direction of the input shaft 12. The two ends of the buffer elastic element 143 are connected to the sliding sleeve 142 and the linkage sleeve 141, respectively. The actuating assembly 15 is connected to the sliding sleeve 142. The actuating assembly 15 is used to drive the sliding sleeve 142 to slide along the first direction F1, so that the buffer elastic element 143 drives the linkage sleeve 141 to separate from the second spline 1311. Then the actuating assembly 15 can apply force to the linkage sleeve 141 to drive the linkage sleeve 141 to slide along the first direction F1.

[0036] When in use, the input end 122 of the transmission device 10 is connected to the reduction gearbox of the power system, and the end of the transmission shaft 13 away from the input shaft 12 is connected to the front drive axle 41 or the rear drive axle 42 of the walking system 40. When it is necessary to disconnect the power between the power system and the front drive axle 41 or the rear drive axle 42 of the walking system 40, the actuating component 15 drives the sliding sleeve 142 to slide along the first direction F1. The sliding sleeve 142 applies force to the buffer elastic element 143, causing the buffer elastic element 143 to deform. The buffer elastic element 143 applies a force along the first direction F1 to the linkage sleeve 141. If the linkage sleeve 141 and the second spline 1311 are closely fitted, the friction between the linkage sleeve 141 and the second spline 1311 is large and they are not easy to separate. At this time, the sliding sleeve 142 can continue to slide along the first direction F1 under the action of the actuating component 15, and the buffer elastic element 143 continues to deform to store energy. When the drive shaft 13 rotates, changing the gap between the linkage sleeve 141 and the second spline 1311, and the linkage sleeve 141 and the second spline 1311 are no longer tightly fitted, the buffer elastic element 143 drives the linkage sleeve 141 to slide along the first direction F1, separating the linkage sleeve 141 from the second spline 1311, thereby disconnecting the power between the power system and the front drive axle 41 or the rear drive axle 42 of the travel system 40. Therefore, regardless of whether the linkage sleeve 141 and the second spline 1311 are tightly fitted, the actuating component 15 can drive the sliding sleeve 142 to slide along the first direction F1 without jamming, thus improving the smoothness of disconnecting the power from the travel system 40. In addition, the sliding sleeve 142 and the linkage sleeve 141 are buffered by the buffer elastic element 143. When the actuating component 15 drives the sliding sleeve 142 to move along the first direction F1, it will not forcibly drive the linkage sleeve 141 to move, thereby reducing the probability of damage to the actuating component 15, the linkage sleeve 141 and the second spline 1311, and reducing the wear between the linkage sleeve 141 and the second spline 1311, thereby improving the service life of the transmission device 10.

[0037] It should be noted that when the power between the power system and the front drive axle 41 or rear drive axle 42 of the walking system 40 is disconnected, the all-terrain vehicle 100 is generally in a stopped state. At this time, the linkage sleeve 141 and the second spline 1311 are easily squeezed, and the linkage sleeve 141 and the second spline 1311 are not easy to separate. If the actuating component 15 drives the sliding sleeve 142 to slide along the first direction F1, the buffer elastic element 143 has difficulty pulling the linkage sleeve 141, and the buffer elastic element 143 deforms to store energy. When the all-terrain vehicle 100 moves, the drive shaft 13 rotates, causing the gap between the linkage sleeve 141 and the second spline 1311 to change. The buffer elastic element 143 drives the linkage sleeve 141 to slide along the first direction F1, causing the linkage sleeve 141 to separate from the second spline 1311, thereby disconnecting the power between the power system and the front drive axle 41 or rear drive axle 42 of the walking system 40.

[0038] In some embodiments, the rear drive axle 42 includes a rear axle housing 421, and a housing 11 is mounted on the rear axle housing 421. In other embodiments, the housing 11 may also be mounted on the frame 20.

[0039] In some embodiments, the cushioning elastic element 143 may be a spring.

[0040] In some embodiments, when the transmission device 10 transmits the power output from the power system to the walking system 40 again, a force is applied to the linkage sleeve 141 to move the linkage sleeve 141 along the second direction F2, and the linkage sleeve 141 is slidably connected to the second spline 1311 again. At this time, the input shaft 12, the transmission shaft 13 and the linkage sleeve 141 can rotate synchronously around the first axis 121, thereby transmitting the power output from the power system to the walking system 40.

[0041] In some embodiments, the transmission is a steel belt continuously variable transmission (CVT). When the all-terrain vehicle 100 malfunctions and stalls, the steel belt (not shown) remains taut, and the oil pump (not shown) is not working, failing to raise the lubricating oil to the vicinity of the steel belt. If the all-terrain vehicle 100 is towed at this time, the front wheels are generally off the ground, and the rear wheels, while rotating, transmit power to the transmission via the rear drive axle 42, transmission device 10, and reduction gearbox, resulting in significant wear on the steel belt. By operating the actuating assembly 15 to move the sliding sleeve 142 along the first direction F1, the power between the rear drive axle 42 and the reduction gearbox is disconnected. This prevents the rear wheels from transmitting power to the transmission while rotating, thus protecting the transmission.

[0042] In some embodiments, a drive shaft (not shown) is provided between the gearbox and the input shaft 12. One end of the gearbox is connected to the drive shaft, and the input end 122 is splined to the other end of the drive shaft, thereby improving the accuracy and stability of power transmission between the gearbox and the input shaft 12.

[0043] In some embodiments, a bevel gear 132 is provided at one end of the drive shaft 13 away from the input shaft 12. The bevel gear 132 meshes with the differential (not shown) of the rear drive axle 42, thereby improving the convenience and accuracy of the transmission connection between the drive shaft 13 and the rear drive axle 42.

[0044] Please see Figure 1 and Figure 2 In some embodiments, the linkage assembly 14 further includes a reset elastic element 144. The reset elastic element 144 is sleeved on the input shaft 12 and is located on the side of the linkage sleeve 141 facing the input end 122. One end of the reset elastic element 144 is connected to the linkage sleeve 141, and the other end of the reset elastic element 144 is connected to the input shaft 12. The reset elastic element 144 can at least provide a force along the second direction F2 to the linkage sleeve 141.

[0045] When the actuating assembly 15 drives the sliding sleeve 142 to slide along the first direction F1, disconnecting the power between the rear drive axle 42 and the reduction gearbox, the reset elastic element 144 is compressed. When it is necessary to transmit the power output from the power system to the walking system 40 again, the actuating assembly 15 is released, and the reset elastic element 144 drives the linkage sleeve 141 to move along the second direction F2. Even if the linkage sleeve 141 is not initially aligned with the second spline 1311, as long as the drive shaft 13 continues to rotate to align the linkage sleeve 141 with the second spline 1311, the reset elastic element 144 can drive the linkage sleeve 141 to slide and connect with the second spline 1311 again. Since the linkage sleeve 141 is not forcibly slid and connected with the second spline 1311 under external force, the probability of damaging the linkage sleeve 141 and the second spline 1311 is reduced, thus improving the service life of the transmission device 10.

[0046] In some embodiments, the reset elastic element 144 may be a spring.

[0047] In some other embodiments, the actuating component 15 can also drive the sliding sleeve 142 to slide along the second direction F2. The sliding sleeve 142 drives the linkage sleeve 141 to slide along the second direction F2 through the buffer elastic element 143, so that the linkage sleeve 141 and the second spline 1311 are slidably connected again, realizing the function of transmitting the power output of the power system to the walking system 40 again.

[0048] Please see Figure 2 In some embodiments, the transmission device 10 further includes a bearing 16, which is sleeved on the input shaft 12 and connected to the housing 11. The bearing 16 is located between the input end 122 and the output end 123. The bearing 16 includes an inner ring 161 and an outer ring 162. The inner ring 161 is sleeved on the input shaft 12 and is rotatable relative to the outer ring 162. One end of the reset elastic member 144 abuts against the linkage sleeve 141, and the other end of the reset elastic member 144 abuts against the inner ring 161. The reset elastic member 144 is connected to the input shaft 12 through the inner ring 161. When the input shaft 12 drives the linkage sleeve 141 to rotate, the reset elastic member 144 rotates synchronously with the input shaft 12 and the linkage sleeve 141, thereby effectively reducing the probability of the two ends of the reset elastic member 144 being twisted and damaged due to asynchronous rotation.

[0049] Please see Figure 3 and Figure 4In some embodiments, the sliding sleeve 142 has an inner hole 1421 and multiple sliding grooves 1422. The inner hole 1421 extends axially along the input shaft 12. The linkage sleeve 141 is slidably inserted into the inner hole 1421. The multiple sliding grooves 1422 are spaced apart circumferentially along the sliding sleeve 142. Each sliding groove 1422 communicates with the inner hole 1421 and also communicates with the end of the sliding sleeve 142 away from the input end 122. The outer peripheral wall of the linkage sleeve 141 has multiple sliding protrusions 1412. The multiple sliding protrusions 1412 are spaced apart circumferentially along the linkage sleeve 141. Each sliding protrusion 1412 extends axially along the input shaft 12. The multiple sliding protrusions 1412 are slidably disposed in the multiple sliding grooves 1422. The buffer elastic element 143 is sleeved on the outer periphery of the sliding sleeve 142. One end of the buffer elastic element 143 is connected to the end of the sliding sleeve 142 away from the input end 122, and the other end of the buffer elastic element 143 is connected to the end of the linkage sleeve 141 close to the input end 122.

[0050] By setting the sliding groove 1422 and the sliding protrusion 1412, the sliding sleeve 142 slides more accurately relative to the linkage sleeve 141 along the axial direction of the input shaft 12. In addition, by sleeved the buffer elastic element 143 on the outer periphery of the sliding sleeve 142, with one end of the buffer elastic element 143 connected to the end of the sliding sleeve 142 away from the input end 122 and the other end of the buffer elastic element 143 connected to the end of the linkage sleeve 141 near the input end 122, the structure of the linkage assembly 14 is made more compact, and the linkage assembly 14 has a smaller axial dimension on the input shaft 12, which helps to reduce the size of the transmission device 10.

[0051] Please see Figure 2 , Figure 3 and Figure 4 In some embodiments, the outer peripheral wall of the sliding sleeve 142 away from the input end 122 is provided with a plurality of engaging grooves 1423, which are staggered with the plurality of sliding grooves 1422 along the circumference of the sliding sleeve 142. A plurality of sliding protrusions 1412 are each provided with a locking groove 1412a at the end near the input end 122, which are arranged along the circumference of the linkage sleeve 141. The linkage assembly 14 also includes a first stop 145 and a second stop 146. The first stop 145 engages with the plurality of engaging grooves 1423, which restrict the first stop 145 from sliding relative to the engaging grooves 1423 along the axial direction of the input shaft 12. The second stop 146 engages with the plurality of locking grooves 1412a, which restrict the second stop 146 from sliding relative to the locking grooves 1412a along the axial direction of the input shaft 12. The buffer elastic element 143 abuts between the first stop 145 and the second stop 146.

[0052] By setting up the snap-fit ​​groove 1423, the snap-fit ​​groove 1412a, the first stop 145 and the second stop 146, when installing the buffer elastic member 143, the second stop 146 is snapped into the multiple snap-fit ​​grooves 1412a, one end of the buffer elastic member 143 is abutted against the second stop 146, the first stop 145 is snapped into the multiple snap-fit ​​grooves 1423, and the other end of the first stop 145 is abutted against the buffer elastic member 143, thereby improving the convenience of installing the buffer elastic member 143.

[0053] In some embodiments, multiple snap-fit ​​grooves 1423 extend circumferentially along the sliding sleeve 142, multiple snap-fit ​​grooves 1412a extend circumferentially along the linkage sleeve 141, and the first stop 145 and the second stop 146 are both clamps. This makes it easier to assemble and disassemble the first stop 145 with the multiple snap-fit ​​grooves 1423 and the second stop 146 with the multiple snap-fit ​​grooves 1412a, thereby improving the ease of assembling and disassembling the buffer elastic element 143.

[0054] Please see Figure 3 and Figure 4 In some embodiments, the outer peripheral wall of the sliding sleeve 142 near the input end 122 is provided with a stop protrusion 1424. The actuating component 15 extends to the side of the stop protrusion 1424 opposite to the input end 122, and the actuating component 15 is used to push the stop protrusion 1424 to move along the first direction F1 so that the sliding sleeve 142 slides along the first direction F1.

[0055] When the actuating component 15 does not need to move the sliding sleeve 142 along the first direction F1, the actuating component 15 does not contact the stop protrusion 1424 or the outer peripheral wall of the sliding sleeve 142, thereby effectively reducing the probability of wear between the actuating component 15 and the sliding sleeve 142 when the sliding sleeve 142 rotates. When the actuating component 15 moves the sliding sleeve 142 along the first direction F1, the actuating component 15 pushes the stop protrusion 1424 to move along the first direction F1, and the sliding sleeve 142 slides along the first direction F1, thereby improving the accuracy of the actuating component 15 in moving the sliding sleeve 142 along the first direction F1.

[0056] In some other embodiments, a bearing sleeve (not shown) may be fitted onto the outer peripheral wall of the sliding sleeve 142 near the input end 122. The actuating assembly 15 is connected to the bearing sleeve and, through the bearing sleeve, to the sliding sleeve 142. When the sliding sleeve 142 rotates, the bearing sleeve can also reduce the probability of wear between the actuating assembly 15 and the sliding sleeve 142.

[0057] Please see Figure 2 , Figure 3 and Figure 5In some embodiments, the linkage sleeve 141 has a through hole 1411 extending along the first axis 121, and both the output end 123 and the transmission end 131 are located within the through hole 1411. The through hole 1411 includes a connecting section 1411a and a positioning section 1411b. The connecting section 1411a is located on the side of the positioning section 1411b facing the input end 122. The inner wall of the connecting section 1411a has a keyway 1413, which is slidably connected to the first spline 1231 and can be slidably connected to or separated from the second spline 1311. The outer peripheral wall of the transmission end 131 has a positioning boss 1312, which is located on the side of the second spline 1311 away from the input end 122, and the positioning boss 1312 is slidably fitted into the positioning section 1411b.

[0058] When the actuating component 15 drives the sliding sleeve 142 to slide along the first direction F1, the sliding sleeve 142 drives the linkage sleeve 141 to slide along the first direction F1 through the buffer elastic element 143. The keyway 1413 separates from the second spline 1311. At this time, the positioning boss 1312 supports the linkage sleeve 141 radially to restrict the linkage sleeve 141 from moving radially relative to the positioning boss 1312, thereby facilitating the accurate sliding connection between the keyway 1413 and the second spline 1311 again. When the power output from the power system needs to be transmitted to the walking system 40 again, the linkage sleeve 141 moves along the second direction F2 under the drive of the reset elastic member 144, so that the keyway 1413 slides and connects with the second spline 1311. The positioning boss 1312 abuts against and limits the second spline 1311. The positioning boss 1312 can restrict the movement of the linkage sleeve 141 along the second direction F2 and limit the distance of the linkage sleeve 141 moving along the second direction F2, so that the actuating component 15 is separated from the sliding sleeve 142 along the axial direction of the input shaft 12. Specifically, the actuating component 15 is separated from the stop protrusion 1424 along the axial direction of the input shaft 12, thereby reducing the probability of wear between the actuating component 15 and the sliding sleeve 142. In addition, by setting the positioning boss 1312 to abut against the limiting second spline 1311, it is possible to prevent the linkage sleeve 141 from moving excessively along the second direction F2 and separating from the first spline 1231 under the drive of the reset elastic member 144, thereby improving the accuracy and stability of the transmission device 10 in transmitting the power output of the power system to the walking system 40.

[0059] Understandably, there may be errors in the processing of the perforation 1411. The perforation 1411 extends approximately along the first axis 121, but not absolutely along the first axis 121.

[0060] Please refer to the following: Figure 6In some embodiments, the shift assembly 15 includes a shift shaft 151, a rocker arm 152, a shift fork 153, and a return elastic member 154. The shift shaft 151 is rotatably inserted into the housing 11, and the extension direction of the shift shaft 151 is perpendicular to the extension direction of the input shaft 12. The axis of the shift shaft 151 is defined as the second axis 1511. The rocker arm 152 is connected to one end of the shift shaft 151 located outside the housing 11, and the rocker arm 152 is used to drive the shift shaft 151 to rotate around the second axis 1511. The shift fork 153 is connected to the portion of the shift shaft 151 located inside the housing 11. The end of the shift fork 153 away from the shift shaft 151 has two actuating portions 1531, spaced apart axially along the shift shaft 151. The two actuating portions 1531 extend to the side of the stop protrusion 1424 opposite to the input end 122. The two actuating portions 1531 are used to push the stop protrusion 1424 to move along a first direction F1. A return elastic member 154 is sleeved on the shift shaft 151 and located outside the housing 11. Both ends of the return elastic member 154 are connected to the rocker arm 152 and the housing 11, respectively. The return elastic member 154 is used to drive the shift shaft 151 and the shift fork 153 to rotate, causing the shift fork 153 to return to its original position. When the shift fork 153 returns to its original position, the two actuating portions 1531 move away from the stop protrusion 1424 along a second direction F2.

[0061] By setting the specific structure of the toggle assembly 15, when it is necessary to disconnect the power between the power system and the walking system 40, force is applied to the rocker arm 152 to cause the rocker arm 152 to drive the shift shaft 151 to rotate around the second axis 1511. The rocker arm 152 drives the shift fork 153 to rotate, causing the two toggle parts 1531 to push against the stop protrusion 1424 and move along the first direction F1. Then, the sliding sleeve 142 drives the linkage sleeve 141 to move along the first direction F1 through the buffer elastic element 143. The linkage sleeve 141 separates from the second spline 1311, thereby improving the convenience and accuracy of sliding the sliding sleeve 142 along the first direction F1 and improving the convenience and accuracy of disconnecting the power between the power system and the walking system 40. When the power output from the power system needs to be transmitted to the walking system 40, the rocker arm 152 is released. The return elastic element 154 drives the shift shaft 151 and the shift fork 153 to rotate, causing the shift fork 153 to return to its original position. The reset elastic element 144 drives the linkage sleeve 141 to move along the second direction F2. The linkage sleeve 141 drives the sliding sleeve 142 to move along the second direction F2 through the buffer elastic element 143. Since the two actuating parts 1531 move away from the stop protrusion 1424 along the second direction F2 when the shift fork 153 returns to its original position, the movement of the sliding sleeve 142 along the second direction F2 is avoided. Furthermore, by setting the two actuating parts 1531 to move away from the stop protrusion 1424 along the second direction F2 when the shift fork 153 returns to its original position, the probability of the two actuating parts 1531 wearing against the sliding sleeve 142 when the sliding sleeve 142 rotates can also be reduced.

[0062] In some embodiments, the return elastic element 154 may be a torsion spring.

[0063] In some embodiments, the shift assembly 15 further includes a first cylindrical pin 155 and a second cylindrical pin 156. The first cylindrical pin 155 is inserted into the shift shaft 151 and connected to the rocker arm 152, and the first cylindrical pin 155 restricts the movement of the shift shaft 151 relative to the shift shaft 151 about a second axis 1511. The second cylindrical pin 156 is inserted into the shift shaft 151 and connected to the shift fork 153, and the second cylindrical pin 156 restricts the movement of the shift fork 153 relative to the shift shaft 151 about a second axis 1511.

[0064] Please see Figure 6 and Figure 7 In some embodiments, the shift fork 153 further includes a connecting portion 1532, which is connected to the portion of the shift shaft 151 located inside the housing 11. A second cylindrical pin 156 is inserted into the shift shaft 151 and connected to the connecting portion 1532. Both actuating portions 1531 are connected to the connecting portion 1532. The inner wall of the housing 11 has two limiting surfaces 111, which are spaced apart along the axial direction of the shift shaft 151. The two limiting surfaces 111 are used to abut against the connecting portion 1532 from both sides, so that the two actuating portions 1531 do not contact the outer peripheral wall of the sliding sleeve 142 along the axial direction of the shift shaft 151.

[0065] By setting two limiting surfaces 111, the two actuating parts 1531 are kept out of contact with the outer peripheral wall of the sliding sleeve 142, which can prevent the sliding sleeve 142 from rubbing against the two actuating parts 1531 when it rotates with the input shaft 12, thereby reducing the probability of wear on the sliding sleeve 142 and the two actuating parts 1531.

[0066] In some embodiments, the distance between the two actuating parts 1531 and the outer peripheral wall of the sliding sleeve 142 in the radial direction of the sliding sleeve 142 is in the range of 0.5mm-2mm, which can prevent the sliding sleeve 142 from rubbing against the two actuating parts 1531 when it rotates with the input shaft 12, thereby reducing the probability of wear on the sliding sleeve 142 and the two actuating parts 1531.

[0067] Please see Figure 6 , Figure 7 and Figure 8In some embodiments, the shift fork 153 further includes an abutment boss 1533, which is located at the end of any actuating part 1531 near the shift shaft 151. The inner wall of the housing 11 is provided with a limiting boss 112, which is located on the movement path of the abutment boss 1533. The limiting boss 112 abuts against the limiting abutment boss 1533 to restrict the rotation of the shift shaft 151 and shift fork 153 by the return elastic member 154, preventing the shift fork 153 from rotating beyond a preset angle when it returns to its original position. The preset angle refers to the angle at which the return elastic member 154 rotates the shift shaft 151 and shift fork 153 when the shift fork 153 returns to its original position.

[0068] By setting the abutment boss 1533 and the limiting boss 112 to cooperate in restricting the return elastic member 154 from driving the shift shaft 151 and shift fork 153 to rotate, so that the shift fork 153 rotates beyond the preset angle when it returns to its original position, it can prevent the shift shaft 151 and shift fork 153 from rotating excessively under the drive of the return elastic member 154, causing the two actuating parts 1531 of the shift fork 153 to abut against the second stop member 146 along the second direction F2. When the abutment boss 1533 and the limiting boss abut against the limit, the two actuating parts 1531 are located between the stop protrusion 1424 and the second stop member 146, and will not contact the stop protrusion 1424 or the second stop member 146, thereby reducing the probability of wear on the stop protrusion 1424, the second stop member 146 and the two actuating parts 1531.

[0069] In summary, the transmission device 10 of this application embodiment, by setting an input shaft 12, a transmission shaft 13, actuating component 15, a linkage sleeve 141, a sliding sleeve 142, and a buffer elastic element 143, can provide a continuous elastic force through the buffer elastic element 143 when it is necessary to disconnect the power between the power system and the walking system 40. Regardless of whether the linkage sleeve 141 and the second spline 1311 are tightly fitted, the actuating component 15 can provide a continuous elastic force. This allows the linkage sleeve 141 to slide along the first direction immediately when the fit between the linkage sleeve 141 and the second spline 1311 becomes loose, and disconnect the transmission connection between the linkage sleeve 141 and the transmission shaft 13. This process will not cause jamming, thereby improving the smoothness of disconnecting the power of the walking system 40. In addition, since the sliding sleeve 142 and the linkage sleeve 141 are buffered by the buffer elastic element 143, when the actuating component 15 drives the sliding sleeve 142 to move along the first direction F1, it will not forcibly drive the linkage sleeve 141 to move. This reduces the probability of damage to the actuating component 15, the linkage sleeve 141 and the second spline 1311, and reduces the wear between the linkage sleeve 141 and the second spline 1311, thereby improving the service life of the transmission device 10.

[0070] The all-terrain vehicle 100 of this application embodiment improves the smoothness of power disconnection of the walking system 40 and extends its service life by providing the transmission device 10 described in any of the above embodiments.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A transmission device, comprising: case; An input shaft is rotatably inserted into the housing. The two ends of the input shaft are an input end and an output end, respectively. The input end is located outside the housing, and the output end is located inside the housing. The outer peripheral wall of the output end is provided with a first spline. A drive shaft is rotatably inserted into the housing and coaxially arranged with the input shaft; the end of the drive shaft near the input shaft is the drive end, and the outer peripheral wall of the drive end is provided with a second spline; A linkage assembly includes a linkage sleeve sleeved on the outside of the output end and the transmission end. The linkage sleeve has a first direction parallel to the axial direction of the input shaft and pointing from the transmission shaft to the input shaft, and a second direction opposite to the first direction. The linkage sleeve is slidable relative to the output end and the transmission end along the first direction or the second direction. The linkage sleeve is slidably connected to the first spline, and the linkage sleeve can be slidably connected to or separated from the second spline; when the linkage sleeve is slidably connected to the second spline, the input shaft, the transmission shaft and the linkage sleeve can rotate synchronously around the axis of the input shaft; A toggle component is capable of applying force to the linkage sleeve to drive the linkage sleeve to slide along the first direction; The linkage component is characterized in that it further includes a sliding sleeve and a buffer elastic element. The sliding sleeve is slidable relative to the linkage sleeve along the axial direction of the input shaft. The two ends of the buffer elastic element are respectively connected to the sliding sleeve and the linkage sleeve. The actuating component is connected to the sliding sleeve and is used to drive the sliding sleeve to slide along the first direction so that the buffer elastic element drives the linkage sleeve to separate from the second spline.

2. The transmission of claim 1, wherein The sliding sleeve has an inner hole with multiple sliding grooves. The inner hole extends axially along the input shaft. The linkage sleeve is slidably inserted into the inner hole. The multiple sliding grooves are spaced apart circumferentially along the sliding sleeve and all extend axially along the input shaft. Each sliding groove communicates with the inner hole and also with the end of the sliding sleeve away from the input end. The outer peripheral wall of the linkage sleeve has multiple sliding protrusions spaced apart circumferentially along the linkage sleeve and all extend axially along the input shaft. The multiple sliding protrusions are slidably disposed in the multiple sliding grooves. The buffer elastic element is sleeved on the outer periphery of the sliding sleeve. One end of the buffer elastic element is connected to the end of the sliding sleeve away from the input end, and the other end of the buffer elastic element is connected to the end of the linkage sleeve near the input end.

3. The transmission of claim 2, wherein The outer peripheral wall of the sliding sleeve away from the input end has multiple locking grooves, which are staggered with the sliding grooves along the circumference of the sliding sleeve. Each of the sliding protrusions near the input end has a locking groove, which is arranged along the circumference of the linkage sleeve. The linkage assembly further includes a first stop and a second stop. The first stop engages with the multiple locking grooves, which restrict the first stop from sliding relative to the locking grooves along the axial direction of the input shaft. The second stop engages with the multiple locking grooves, which restrict the second stop from sliding relative to the locking grooves along the axial direction of the input shaft. The buffer elastic element abuts between the first stop and the second stop.

4. The transmission device as described in claim 1, characterized in that, The linkage assembly further includes a reset elastic element, which is sleeved on the input shaft. The reset elastic element is located on the side of the linkage sleeve facing the input end. One end of the reset elastic element is connected to the linkage sleeve, and the other end of the reset elastic element is connected to the input shaft. The reset elastic element can at least provide a force to the linkage sleeve in the second direction.

5. The transmission device as described in claim 1, characterized in that, The linkage sleeve has a through hole extending along the axis of the input shaft, and both the output end and the transmission end are located within the through hole. The through hole includes a connecting section and a positioning section. The connecting section is located on the side of the positioning section facing the input end, and the inner wall of the connecting section has a keyway. The keyway is slidably connected to the first spline and can be slidably connected to or separated from the second spline. The outer peripheral wall of the transmission end has a positioning boss, which is located on the side of the second spline away from the input end. The positioning boss is slidably engaged with the positioning section. When the keyway is separated from the second spline, the positioning boss supports the linkage sleeve radially to restrict the linkage sleeve from moving radially relative to the positioning boss. When the positioning boss abuts against the second spline, the positioning boss can restrict the linkage sleeve from moving in the second direction. The keyway is slidably connected to the second spline, and the actuating component is separated from the sliding sleeve axially along the input shaft.

6. The transmission device as described in claim 1, characterized in that, The outer peripheral wall of the sliding sleeve near the input end is provided with a stop protrusion. The actuating component extends to the side of the stop protrusion away from the input end. The actuating component is used to push the stop protrusion to move along the first direction so that the sliding sleeve slides along the first direction.

7. The transmission device as described in claim 6, characterized in that, The shifting assembly includes a rocker arm, a shift shaft, a shift fork, and a return elastic element. The shift shaft is rotatably inserted into the housing, and its extension direction is perpendicular to the extension direction of the input shaft. The rocker arm is connected to the end of the shift shaft located outside the housing, and the rocker arm is used to drive the shift shaft to rotate around its own axis. The shift fork is connected to the portion of the shift shaft located inside the housing. The end of the shift fork away from the shift shaft has two actuating parts, which are spaced apart along the axial direction of the shift shaft. The two actuating parts extend to the side of the stop protrusion away from the input end, and are used to push the stop protrusion to move along the first direction. The return elastic element is sleeved on the shift shaft and located outside the housing. Both ends of the return elastic element are connected to the rocker arm and the housing, respectively. The return elastic element is used to drive the shift shaft and the shift fork to rotate so that the shift fork returns to its original position. When the shift fork returns to its original position, the two actuating parts move away from the stop protrusion along the second direction.

8. The transmission device as described in claim 7, characterized in that, The shift fork further includes a connecting portion, which is connected to the portion of the shift shaft located inside the housing. Both of the shifting parts are connected to the connecting portion. The inner wall of the housing has two limiting surfaces, which are spaced apart along the axial direction of the shift shaft. The two limiting surfaces are used to abut and limit the connecting portion from both sides, so that the two shifting parts do not contact the outer peripheral wall of the sliding sleeve along the axial direction of the shift shaft.

9. The transmission device as described in claim 7, characterized in that, The shift fork also has an abutment boss, which is located at one end of any of the shifting parts near the shift shaft. The inner wall of the housing is provided with a limiting boss, which is located on the moving path of the abutment boss. The limiting boss is used to abut against and limit the abutment boss, so as to restrict the return elastic element from driving the shift shaft and the shift fork to rotate so that the shift fork rotates more than a preset angle when it returns to its original position.

10. An all-terrain vehicle, comprising: Frame; A body panel that at least covers the vehicle frame; A walking system, at least partially located below the vehicle frame; A power system, which is supported by the frame and connected to the running gear; Its features are, The all-terrain vehicle further includes a transmission device as described in any one of claims 1-9, wherein the input shaft is drive-connected to the power system and the drive shaft is drive-connected to the walking system.

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