All Terrain Vehicles

Abstract

The present application provides an all-terrain vehicle, which relates to the field of vehicle technology and is used to solve the technical problem of poor running stability of a driven wheel set in a continuously variable transmission of an existing all-terrain vehicle. In the continuously variable transmission of the all-terrain vehicle, the first wheel disc and the second wheel disc of the driven wheel set are both coaxially arranged with the transmission shaft, and both rotate relative to the transmission shaft. A transmission seat is arranged between the first wheel disc and the second wheel disc, and the transmission seat is connected to the transmission shaft and rotates synchronously with the transmission shaft; the second wheel disc is connected to a transmission member, and the transmission member can drive the transmission seat to rotate, and transmit power to the transmission shaft through the transmission seat. The all-terrain vehicle provided by the present application transmits the output torque from the driving wheel set to the driven wheel set through the transmission seat, which can reduce the distance between the torque input point of the driven wheel set and the torque output point of the driven wheel set, thereby improving the running stability of the driven wheel set.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an all-terrain vehicle. Background Art

[0002] In order to reduce the impact and setbacks during transmission, continuously variable transmission came into being. Among them, the continuously variable transmission (CVT) is a commonly used continuously variable transmission, which is widely used in all-terrain vehicles, motorcycles and other models. CVT continuously variable transmission generally includes a driving wheel set, a driven wheel set and a belt. The driving wheel set and the driven wheel set transmit power through the belt, and the output radius of the driving wheel set and the input radius of the driven wheel set are automatically changed to achieve continuously variable speed change.

[0003] Among them, the driven wheel group includes a driven wheel fixed wheel disc, a driven wheel movable wheel disc and a driven wheel output shaft. The driven wheel fixed wheel disc is fixedly connected to the driven wheel transmission shaft, and can transmit the output torque from the driving wheel group to the driven wheel transmission shaft, and then transmit it to the gearbox through the driven wheel transmission shaft.

[0004] However, in the above-mentioned continuously variable transmission, the distance between the torque input point of the driven wheel set and the torque output point of the driven wheel set is relatively large, which affects the running stability of the driven wheel set. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides an all-terrain vehicle, which can improve the running stability of a driven wheel group.

[0006] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0007] A first aspect of an embodiment of the present application provides an all-terrain vehicle, including a frame, front and rear wheels supporting the frame, and a powertrain arranged on the frame, the powertrain including a continuously variable transmission having a driving wheel group, a driven wheel group and a transmission member; the driving wheel group transmits power to the driven wheel group through the transmission member, the driven wheel group includes a first wheel disc, a second wheel disc, a transmission shaft, a speed change member and a transmission seat; the first wheel disc and the second wheel disc are both coaxially arranged with the transmission shaft, the first wheel disc and the second wheel disc are both rotatable relative to the transmission shaft, and the second wheel disc can move axially along the transmission shaft, and the mutually facing side disc surfaces of the first wheel disc and the second wheel disc are both relative to the The transmission shaft is arranged obliquely to jointly form a wheel groove for accommodating the transmission member, and the width of the wheel groove at the groove mouth is greater than the groove width at the groove bottom of the wheel groove; the transmission seat is located between the first wheel disc and the second wheel disc, the transmission seat is connected to the transmission shaft and rotates synchronously with the transmission shaft, the second wheel disc is connected to the speed change member, and the speed change member is configured to drive the transmission seat to rotate so as to transmit power to the transmission shaft through the transmission seat; the power transmission component is connected to the first wheel disc, and the first wheel disc transmits power to the second wheel disc through the power transmission component, and the power transmission component and the transmission seat are respectively located in different circumferential directions of the second wheel disc.

[0008] In an optional embodiment, the transmission seat includes an annular sleeve and at least one rolling element; the annular sleeve is sleeved on the transmission shaft and rotates synchronously with the transmission shaft; the rolling element is rotatably arranged on the side of the annular sleeve, and the rotation axis of the rolling element has an angle with the axis of the transmission shaft, and the rolling element is configured to abut against the speed change element to transmit power to the second wheel disc.

[0009] In an optional embodiment, the rotation axis of the rolling element and the axis of the transmission shaft are perpendicular to each other.

[0010] In an optional embodiment, the driven wheel assembly also includes a return spring; the return spring is sleeved on the transmission shaft, and one end of the return spring abuts against the transmission seat, and the other end abuts against the second wheel plate, so that the second wheel plate moves relatively along the axial direction of the transmission shaft.

[0011] In an optional embodiment, the annular sleeve is provided with an annular positioning groove, the axial direction of the annular positioning groove is consistent with the axial direction of the annular sleeve; one end of the return spring abuts against the annular positioning groove, and the other end of the return spring abuts against the inner surface of the second wheel disc.

[0012] In an optional embodiment, splines or transmission teeth are provided between the annular sleeve and the transmission shaft, and the annular sleeve and the transmission shaft are connected through the splines or the transmission teeth.

[0013] In an optional embodiment, a pin is disposed on the side wall of the annular sleeve; the axis of the pin is perpendicular to the axis of the transmission shaft, and the rolling element is rotatably connected to the pin.

[0014] In an optional embodiment, the transmission shaft is provided with an elastic retaining ring and / or a washer for axially limiting the annular sleeve.

[0015] In an optional embodiment, a rolling bearing is arranged between the first wheel disc and the transmission shaft, and the first wheel disc is rotatably connected to the transmission shaft through the rolling bearing; a sliding bearing is arranged between the second wheel disc and the transmission shaft, and the second wheel disc is connected to the transmission shaft through the sliding bearing.

[0016] In an optional embodiment, the speed change member has a limiting groove that cooperates with the rolling member, and the rolling member and the groove wall of the limiting groove cooperate and abut to transmit power to the second wheel disc.

[0017] In an optional embodiment, the speed change member includes an annular side wall extending axially along the transmission shaft; the annular side wall is provided with a notch to form the limiting groove, and the notch of the limiting groove faces the first wheel disc so that the rolling member can extend into the limiting groove.

[0018] In an optional embodiment, the annular side wall further forms a guiding bevel groove; one end of the guiding bevel groove extends to the edge of the annular side wall, and the other end of the guiding bevel groove is connected to the limiting groove.

[0019] In an optional embodiment, the contour dimensions of the guide bevel groove and the limiting groove are larger than the contour outer diameter of the rolling element; the rolling element can roll along the groove walls of the limiting groove and the guide bevel groove.

[0020] In an optional embodiment, the continuously variable transmission further includes a power transmission component, wherein the power transmission component is connected to the first wheel disc; the first wheel disc transmits power to the second wheel disc through the power transmission component.

[0021] In an optional embodiment, the power transmission component includes a slider; the slider is arranged on the side of the first wheel disc facing the second wheel disc, the second wheel disc is provided with a guide groove cooperating with the slider, and the slider is embedded in the guide groove; the slider is configured to rotate circumferentially relative to the second wheel disc and contact with the groove surface of the guide groove to drive the second wheel disc to rotate.

[0022] In an optional embodiment, the power transmission component further includes a slider mounting frame; the slider mounting frame is used to mount the slider, and the slider mounting frame is fixedly connected to the first wheel disc.

[0023] In an optional embodiment, the slider is mounted on the slider mounting frame via a pin, and the slider rotates relative to the slider mounting frame.

[0024] In an optional embodiment, the slider is a rectangular slider, and the extension direction of the guide groove is consistent with the axial direction of the transmission shaft.

[0025] In an optional embodiment, the sliding block and the rolling element are staggered with respect to each other in different circumferential directions of the second wheel disc.

[0026] In an optional embodiment, the second wheel disc has a guide cylinder facing the first wheel disc, and the outer wall of the guide cylinder is cylindrical; the axial direction of the guide cylinder is consistent with the axial direction of the transmission shaft, and the guide cylinder is inserted into the cavity of the first wheel disc.

[0027] In an optional embodiment, the outer wall surface of the guide cylinder is a smooth surface, and the outer wall surface is gap-matched with the inner wall of the cavity.

[0028] In an optional embodiment, the powertrain also includes an engine and a gearbox; the engine is connected to the transmission shaft of the driving wheel group of the continuously variable transmission for inputting power to the driving wheel group; the gearbox is connected to the transmission shaft of the driven wheel group of the continuously variable transmission for receiving output power from the driven wheel group.

[0029] Compared with the related art, the all-terrain vehicle provided in the embodiment of the present application has the following advantages:

[0030] The all-terrain vehicle provided in the embodiment of the present application includes a continuously variable transmission, wherein the driven wheel set of the continuously variable transmission is used to receive power (output torque) from the driving wheel set, and the driven wheel set includes a first wheel disc, a second wheel disc, a transmission shaft, a transmission member, and a transmission seat, wherein the first wheel disc and the second wheel disc are both coaxially arranged with the transmission shaft, and both rotate relative to the transmission shaft. The transmission seat is arranged between the first wheel disc and the second wheel disc, and the transmission seat is connected to the transmission shaft and rotates synchronously with the transmission shaft; the second wheel disc is connected to the transmission member, and the transmission member can drive the transmission seat to rotate, and transmit power to the transmission shaft through the transmission seat.

[0031] Compared with the solution in the related art in which the fixed wheel plate of the driven wheel group is fixedly connected to the transmission shaft, that is, the output torque from the driving wheel group is transmitted to the driven wheel group through the fixed wheel plate; in the embodiment of the present application, the output torque from the driving wheel group is transmitted to the driven wheel group through the transmission seat, and the transmission seat is located between the first wheel plate and the second wheel plate, which can reduce the distance between the torque input point of the driven wheel group and the torque output point of the driven wheel group, thereby improving the operating stability of the driven wheel group.

[0032] In addition to the technical problems solved by the embodiments of the present disclosure, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of the technical solutions described above, other technical problems that can be solved by the all-terrain vehicle provided by the embodiments of the present disclosure, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of the structure of an all-terrain vehicle provided in an embodiment of the present application;

[0035] Figure 2 A schematic diagram of the powertrain structure provided in an embodiment of the present application;

[0036] Figure 3 for Figure 2 An exploded schematic diagram of a continuously variable transmission in FIG.

[0037] Figure 4 A schematic diagram of the connection between the driving wheel group, the driven wheel group and the transmission member provided in the embodiment of the present application;

[0038] Figure 5 A top view of a driven wheel assembly provided in an embodiment of the present application;

[0039] Figure 6 for Figure 5 Middle AA section view;

[0040] Figure 7 for Figure 5 Middle BB section view;

[0041] Figure 8 The continuously variable transmission provided in the embodiment of the present application is in the state of maximum speed ratio Figure 1 ;

[0042] Fig. 9 The continuously variable transmission provided in the embodiment of the present application is in the state of maximum speed ratio Figure 2 ;

[0043] Fig.10 A schematic diagram of a continuously variable transmission provided in an embodiment of the present application in a minimum speed ratio state;

[0044] Fig.11 A schematic diagram of a first-angle splitting of a driven wheel assembly provided in an embodiment of the present application;

[0045] Fig.12 A schematic diagram of a split second angle of the driven wheel assembly provided in an embodiment of the present application;

[0046] Fig.13 An exploded schematic diagram of the connection between the transmission seat and the transmission shaft provided in an embodiment of the present application;

[0047] Fig.14 Schematic diagram of the assembly of the slider, rolling element and second wheel provided in the embodiment of the present application Figure 1 ;

[0048] Fig.15 Schematic diagram of the assembly of the slider, rolling element and second wheel provided in the embodiment of the present application Figure 2 ;

[0049] Fig.16 A schematic diagram of the assembly of a slider, a rolling element, and a speed-changing element provided in an embodiment of the present application;

[0050] Fig.17 An exploded schematic diagram of the connection between the slider and the slider mounting frame provided in an embodiment of the present application;

[0051] Fig.18 A schematic diagram of the insertion of the first wheel disc and the second wheel disc provided in an embodiment of the present application.

[0052] Description of reference numerals:

[0053] 10- driven wheel set;

[0054] 11- First wheel;

[0055] 111- cylindrical light hole;

[0056] 12- Second wheel;

[0057] 121-guide groove; 122-guide cylinder;

[0058] 13-driven wheel transmission shaft;

[0059] 14- transmission seat;

[0060] 141- annular sleeve; 142- rolling element; 143- pin shaft; 144- annular positioning groove; 145- transmission tooth;

[0061] 15-speed transmission;

[0062] 151-limiting groove; 152-guiding inclined groove;

[0063] 16-Return spring;

[0064] 17- Power transmission components;

[0065] 171-slider; 172-slider mounting frame;

[0066] 18- rolling bearing;

[0067] 20- belt;

[0068] 30- driving wheel set;

[0069] 31-driving wheel fixed disc; 32-driving wheel movable disc; 33-driving wheel transmission shaft; 34-driving wheel ramp plate; 35-limiting block; 36-speed shifting slider; 37-reset spring; 38-spring mounting seat; 39-limiting sleeve;

[0070] 40-housing;

[0071] 41-intake pipe; 42-exhaust pipe;

[0072] 100-Continuously variable transmission;

[0073] 200-Gearbox;

[0074] 300 - engine;

[0075] 400-frame;

[0076] 500-front axle drive shaft;

[0077] 610-front wheel;

[0078] 620 - rear wheel. DETAILED DESCRIPTION

[0079] As described in the background technology, in the all-terrain vehicle in the related art, the driven wheel group of its continuously variable transmission has the problem of poor running stability. The inventor has found through research that the reason for this problem is that the continuously variable transmission in the related art includes a driving wheel group, a driven wheel group and a belt, and the driving wheel group and the driven wheel group transmit power through the belt; wherein the driven wheel group includes a driven wheel fixed wheel disc, a driven wheel moving wheel disc and a driven wheel transmission shaft, and the driven wheel fixed wheel disc is fixedly connected to the driven wheel transmission shaft, and can transmit the output torque from the driving wheel group to the driven wheel transmission shaft, and then transmit it to the gearbox through the driven wheel transmission shaft. However, the distance between the torque input point of the driven wheel group and the torque output point of the driven wheel group is large, which affects the running stability of the driven wheel group.

[0080] In response to the above technical problems, an embodiment of the present application provides an all-terrain vehicle, whose continuously variable transmission includes a driven wheel group, a driving wheel group, a speed change member and a transmission seat, wherein the first wheel plate and the second wheel plate of the driven wheel group are both coaxially arranged with the transmission shaft, and both can rotate relative to the transmission shaft.

[0081] Furthermore, by arranging the transmission seat between the first wheel disc and the second wheel disc, and the transmission seat is connected to the transmission shaft and rotates synchronously with the transmission shaft; the second wheel disc is connected to the speed change member, and the speed change member can drive the transmission seat to rotate, and transmit power to the transmission shaft through the transmission seat. Such an arrangement can transmit the output torque from the driving wheel set to the driven wheel set through the transmission seat, and the transmission seat is located between the first wheel disc and the second wheel disc, which can reduce the distance between the torque input point of the driven wheel set and the torque output point of the driven wheel set, thereby improving the running stability of the driven wheel set.

[0082] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0083] like Figure 1 and Figure 2 As shown, the all-terrain vehicle provided in the embodiment of the present application includes a frame 400 and a powertrain, a front wheel 610 and a rear wheel 620 arranged on the frame 400; the powertrain includes an engine 300, a gearbox 200 and a continuously variable transmission 100, wherein the engine 300 is transmission-connected to the continuously variable transmission 100, and when the engine 300 is working, the reciprocating motion of its piston is converted into the rotational motion of the crankshaft through the crank-connecting rod mechanism, and the power is output to the continuously variable transmission 100 through the crankshaft.

[0084] like Figure 3 and Figure 4 As shown, the continuously variable transmission 100 provided in the embodiment of the present application includes a housing 40 and a driving wheel set 30, a driven wheel set 10 and a transmission member arranged in the housing 40, wherein the driving wheel set 30 and the driven wheel set 10 transmit power through the transmission member, and the driving wheel set 30 receives the output power from the engine 300, and transmits the output power to the driven wheel set 10 through the transmission member.

[0085] For example, the transmission member in the embodiment of the present application can be a belt 20, and the driving wheel group 30 and the driven wheel group 10 transmit power through the belt 20, and the stepless speed change is achieved through the automatic change of the driving radius of the belt 20 on the driving wheel group 30 and the input radius of the belt 20 on the driven wheel group 10.

[0086] Furthermore, the driven wheel drive shaft of the driven wheel group 10 is connected to the differential, and outputs power to the left and right ends of the rear axle through the differential, and drives the rear wheels 620 of the all-terrain vehicle to rotate. Furthermore, the drive shaft of the driven wheel group 10 is connected to the front axle drive shaft 500 of the gearbox 200, and sequentially drives the left and right front wheels 610 of the all-terrain vehicle through the front axle drive shaft, the front transmission shaft, the front axle input shaft and the front drive axle, and then through the left and right half shafts of the front axle.

[0087] Combine the following Figures 5 to 10 When the continuously variable transmission 100 is in the maximum speed ratio state and the minimum speed ratio state, combined with the driving radius of the belt 20 on the driving wheel group 30 and the input radius change of the belt 20 on the driven wheel group 10, the structure of the driving wheel group 30 and the driven wheel group 10 and the working process of the continuously variable transmission 100 are described in detail.

[0088] See also Fig. 9 and Fig.10 The driving wheel group 30 provided in the embodiment of the present application includes a driving wheel fixed wheel disc 31, a driving wheel movable wheel disc 32, a driving wheel transmission shaft 33 and a driving wheel ramp plate 34, wherein the driving wheel fixed wheel disc 31 is connected to the driving wheel transmission shaft 33 through a knurled inner hole, and the two can rotate synchronously.

[0089] The driving wheel moving disc 32 and the driving wheel ramp plate 34 are arranged opposite to each other, and the driving wheel moving disc 32 and the driving wheel ramp plate 34 are respectively sleeved on the driving wheel transmission shaft 33. The driving wheel ramp plate 34 is fixedly connected to the driving wheel transmission shaft 33, and the driving wheel ramp plate 34 rotates synchronously with the driving wheel transmission shaft 33. The driving wheel moving disc 32 is provided with an inner hole matched with the driving wheel transmission shaft 33, and a sliding bearing is provided in the inner hole, and the driving wheel moving disc 32 is sleeved on the driving wheel transmission shaft 33 through the sliding bearing.

[0090] The driving wheel ramp plate 34 is connected to the driving wheel moving wheel disc 32 through a limit block 35. One side of the limit block 35 is fixed on the driving wheel ramp plate 34. The other side of the limit block 35 has a notch and is clamped with the guide rib of the driving wheel moving wheel disc 32 through the notch.

[0091] The extension direction of the guide ribs of the driving wheel moving disc 32 is consistent with the circumferential direction of the driving wheel transmission shaft 33, and the extension direction of the notch is consistent with the axial direction of the driving wheel transmission shaft 33; when the driving wheel moving disc 32 moves relative to the driving wheel transmission shaft 33, the sliding direction of the driving wheel moving disc 32 can be limited by the limit block 35. It should be noted that a plurality of limit blocks 35 can be provided between the driving wheel ramp plate 34 and the driving wheel moving disc 32, and the plurality of limit blocks 35 are arranged on the driving wheel ramp plate 34 in a circumferential direction.

[0092] There is a receiving groove between the driving wheel ramp plate 34 and the driving wheel moving wheel disc 32, in which a return spring 37 and a spring mounting seat 38 are arranged, wherein the spring mounting seat 38 is sleeved on the driving wheel transmission shaft 33, and the spring mounting seat 38 is installed on the driving wheel transmission shaft 33 through a sliding bearing, so that the spring mounting seat 38 can move along the axial direction of the driving wheel transmission shaft 33.

[0093] The spring mounting seat 38 is arranged between the driving wheel ramp plate 34 and the driving wheel moving wheel disc 32. The side of the spring mounting seat 38 close to the driving wheel moving wheel disc 32 is fixedly connected to the driving wheel moving wheel disc 32 by screws so that the two can move or rotate synchronously relative to the driving wheel transmission shaft 33.

[0094] The return spring 37 is arranged in the cavity of the spring mounting seat 38, and one end of the return spring 37 abuts against the shoulder of the driving wheel transmission shaft 33, thereby axially limiting one end of the return spring 37. The other end of the return spring 37 abuts against the top wall of the spring mounting seat 38, and when the return spring 37 expands and contracts, the spring mounting seat 38 can move relative to the driving wheel transmission shaft 33 along its axial direction.

[0095] It should be noted that a limiting sleeve 39 is provided in the spring mounting seat 38, and the limiting sleeve 39 is sleeved on the driving wheel transmission shaft 33, and one end (bottom end) thereof is axially limited, and the other end (top end) of the limiting sleeve 39 maintains a certain limiting space with the thrust surface of the spring mounting seat 38. When the top end of the limiting sleeve 39 contacts the thrust surface of the spring mounting seat 38, the return spring 37 is in a compressed state, the corresponding driving radius of the belt 20 at the driving wheel set 30 is the largest, the input radius of the belt 20 at the driven wheel set 10 is the smallest, and the transmission ratio of the continuously variable transmission 100 is the smallest.

[0096] The driving wheel group 30 in the embodiment of the present application includes a plurality of speed change sliders 36 , which are evenly distributed on the driving wheel ramp plate 34 along the circumferential direction, and under the action of the return spring 37 , the speed change sliders 36 are pressed between the driving wheel ramp plate 34 and the driving wheel moving wheel disc 32 .

[0097] Due to the different rotation speeds of the driving wheel transmission shaft 33 , the centrifugal force borne by the speed change slider 36 is different. Under the action of the centrifugal force, the speed change slider 36 can change its position, thereby changing the position of the driving wheel moving wheel disc 32 on the driving wheel transmission shaft 33 .

[0098] It should be noted that the driving wheel movable disc 32 and the driving wheel fixed disc 31 have opposite conical surfaces to form a V-shaped groove therebetween, and accordingly, the belt 20 can be a V-shaped belt. The groove is used to accommodate the belt 20, and the position of the belt 20 in the groove changes with the rotation speed of the driving wheel transmission shaft 33.

[0099] See also Figure 8 and Fig. 9 When the engine 300 is in an idle state, the centrifugal force of the speed change slider 36 is insufficient to overcome the elastic force of the return spring 37, and the belt 20 is pressed against the surface of the friction rotating sleeve, and the friction rotating sleeve is arranged on the driving wheel transmission shaft 33, and part of the friction rotating sleeve is located in the wheel groove. At this time, the driving wheel moving wheel disc 32 is in the initial maximum speed ratio position, that is, the driving radius of the belt 20 on the driving wheel group 30 is the smallest, and then the input radius of the belt 20 on the driven wheel group 10 is the largest.

[0100] See also Fig.10 When the engine 300 accelerates from the idle state, the centrifugal force on the speed change slider 36 also increases continuously. The speed change slider 36 uses the driving wheel ramp plate 34 as the moving fulcrum and overcomes the elastic force of the return spring 37 to push the driving wheel moving wheel disc 32 to move axially toward the driving wheel fixed wheel disc 31. The side of the belt 20 gradually contacts the driving wheel moving wheel disc 32. On the one hand, the friction force of the belt 20 gradually increases after being squeezed, and the driving wheel group 30 drives the belt 20 to rotate.

[0101] On the other hand, as the driving wheel moving disc 32 is pushed by the speed change slider 36, the driving wheel moving disc 32 moves axially along the driving wheel shaft, and the belt 20 moves up and down accordingly in the V-shaped wheel groove formed between the driving wheel fixed disc 31 and the driving wheel moving disc 32, thereby controlling the driving radius of the belt 20. When the thrust surface of the spring mounting seat 38 contacts the limiting sleeve 39, the movement displacement of the speed change slider 36 is limited, and at this time the transmission ratio of the continuously variable transmission 100 is the smallest, that is, the driving radius of the belt 20 on the driving wheel set 30 is the largest, and the input radius of the belt 20 on the driven wheel set 10 is the smallest.

[0102] See also Figures 5 to 7The driven wheel assembly 10 in the embodiment of the present application includes a first wheel disc 11, a second wheel disc 12, a driven wheel transmission shaft 13, a speed change member 15 and a transmission seat 14; wherein the first wheel disc 11 and the second wheel disc 12 have conical surfaces opposite to each other, the first wheel disc 11 and the second wheel disc 12 are both coaxially arranged with the driven wheel transmission shaft 13, and the first wheel disc 11 and the second wheel disc 12 are respectively rotatably connected to the driven wheel transmission shaft 13.

[0103] Specifically, the inner hole of the first wheel disc 11 is provided with a rolling bearing 18, and the rolling bearing 18 can be a double-row ball bearing. The first wheel disc 11 is sleeved on the driven wheel transmission shaft 13 through the double-row ball bearing, and the first wheel disc 11 can only rotate circumferentially relative to the driven wheel transmission shaft 13, but the first wheel disc 11 cannot move axially along the driven wheel transmission shaft 13, so the first wheel disc 11 can be defined as a driven wheel fixed wheel disc.

[0104] The inner hole of the second wheel disc 12 is provided with a sliding bearing, and the second wheel disc 12 is sleeved on the driven wheel transmission shaft 13 through the sliding bearing, so that the second wheel disc 12 can not only rotate circumferentially relative to the driven wheel transmission shaft 13, but also move axially along the driven wheel transmission shaft 13. Therefore, the second wheel disc 12 can be defined as a driven wheel moving wheel disc.

[0105] The first wheel disc 11 and the second wheel disc 12 in the embodiment of the present application have conical surfaces arranged relative to each other, and a wheel groove for accommodating the belt 20 can be formed between the conical surfaces of the first wheel disc 11 and the second wheel disc 12, that is, the two side disc surfaces of the first wheel disc 11 and the second wheel disc 12 facing each other are inclined relative to the driven wheel transmission shaft 13 to jointly form a wheel groove for accommodating the belt.

[0106] This wheel groove can be a V-shaped groove, and the width of the wheel groove near the driven wheel transmission shaft 13 is smaller than the width of the outermost side of the wheel groove, that is, the width of the wheel groove at the groove mouth is larger than the groove width at the groove bottom of the wheel groove; accordingly, the belt 20 can be a V-shaped belt.

[0107] The two side surfaces of the belt 20 are in contact with the conical surfaces of the first wheel disc 11 and the second wheel disc 12 respectively. When the belt 20 drives the driven wheel set 10 to rotate, friction is generated between the belt 20 and the first wheel disc 11 and the second wheel disc 12, so that the position of the belt 20 in the wheel groove gradually changes, thereby changing the input radius of the belt 20 on the driven wheel set 10. Correspondingly, in this process, the second wheel disc 12 can move axially to change the relative positions of the first wheel disc 11 and the second wheel disc 12.

[0108] The transmission seat 14 in the embodiment of the present application is located between the first wheel disc 11 and the second wheel disc 12. The transmission seat 14 is connected to the driven wheel transmission shaft 13, and the two can rotate synchronously. The transmission seat 14 is used to receive power from the speed change member 15. The speed change member 15 is fixedly connected to the second wheel disc 12, and the speed change member 15 can follow the axial movement or circumferential rotation of the second wheel disc 12 relative to the driven wheel transmission shaft 13.

[0109] For example, the speed change member 15 is sleeved on the driven wheel transmission shaft 13, and a sliding bearing is provided between the speed change member 15 and the driven wheel transmission shaft 13, so that the speed change member 15 can rotate and move around the driven wheel transmission shaft 13; furthermore, the speed change member 15 is fixed to one side of the second wheel disc 12 by screws so that the two can rotate or move synchronously.

[0110] Furthermore, the speed change member 15 in the embodiment of the present application can drive the transmission seat 14 to rotate, and the speed change member 15 can transmit power to the transmission seat 14, and then transmit the power to the driven wheel transmission shaft 13 through the transmission seat 14, that is, transmit the input torque received by the driven wheel group 10 through the driven wheel transmission shaft 13.

[0111] When the input torque of the driving wheel group 30 is transmitted to the driven wheel group 10 through the transmission member, the transmission member can drive the first wheel plate 11 and the second wheel plate 12 to rotate, and transmit the power to the transmission seat 14 through the speed change member 15, and transmit it to the driven wheel transmission shaft 13 through the transmission seat 14, and drive the driven wheel transmission shaft 13 to rotate.

[0112] Compared with the prior art in which the transmission transmits the output torque from the driving wheel set 30 to the driven wheel set 10 through a fixed wheel plate; in the embodiment of the present application, the output torque from the driving wheel set 30 is transmitted to the driven wheel set 10 through a transmission seat 14, and the transmission seat 14 is located between the first wheel plate 11 and the second wheel plate 12, which can reduce the distance between the torque input point of the driven wheel set 10 and the torque output point of the driven wheel set 10, thereby improving the operating stability of the driven wheel set 10.

[0113] like Figures 11 to 13 As shown, the transmission seat 14 provided in the embodiment of the present application includes an annular sleeve 141 and at least one rolling element 142, wherein the annular sleeve 141 is sleeved on the driven wheel transmission shaft 13 and is located between the first wheel disc 11 and the second wheel disc 12; the annular sleeve 141 is transmission-connected to the driven wheel transmission shaft 13, and the two can realize synchronous rotation.

[0114] The rolling element 142 is rotatably arranged on the side of the annular sleeve 141, that is, the rolling element 142 is arranged on one side of the annular sleeve 141. The rolling element 142 can rotate relative to the annular sleeve 141, and the rotation axis of the rolling element 142 and the axis of the driven wheel transmission shaft 13 have an angle, and this angle can be 90 degrees, that is, the rotation axis of the rolling element 142 and the axis of the driven wheel transmission shaft 13 are perpendicular to each other. In this arrangement, when the rolling element 142 is subjected to force, its force transmission effect can be improved, so that the annular sleeve 141 and the rolling element 142 rotate synchronously.

[0115] Furthermore, the rolling element 142 is configured to abut against the transmission element 15 to receive power from the second wheel disc 12. Specifically, when the transmission element 15 rotates, it can abut against the rolling element 142 and drive the rolling element 142 to rotate along with the transmission element 15, that is, when the transmission element 15 rotates, the power on the transmission element 15 can be transmitted to the rolling element 142, and then transmitted to the annular sleeve 141 through the rolling element 142, thereby driving the driven wheel transmission shaft 13 to rotate.

[0116] For example, the transmission seat 14 provided in the embodiment of the present application may include an annular sleeve 141 and two rolling elements 142. A spline or transmission tooth 145 is arranged between the annular sleeve 141 and the driven wheel transmission shaft 13. The two are connected by the spline or transmission tooth 145. That is, the power applied to the annular sleeve 141 can be transmitted to the driven wheel transmission shaft 13 through the spline or transmission tooth 145, thereby driving the driven wheel transmission shaft 13 to rotate.

[0117] The rolling element 142 can be a roller, and the two rolling elements 142 can be symmetrically arranged on both sides of the annular sleeve 141. Pins 143 for installing the rolling elements 142 are respectively provided on both sides of the annular sleeve 141. The installation direction of the pin 143 is perpendicular to the axial direction of the driven wheel transmission shaft 13, that is, the axis of the pin 143 is perpendicular to the axis of the driven wheel transmission shaft 13.

[0118] One end of the pin 143 is fixedly connected to the annular sleeve 141, and the rolling element 142 is rotatably mounted on the pin 143, and the rotation axis of the rolling element 142 is perpendicular to the axis of the driven wheel transmission shaft 13. In this way, the annular sleeve 141 can be evenly stressed to ensure the stability of the rotation of the annular sleeve 141 and prevent it from being eccentric.

[0119] In order to further improve the rotation stability of the annular sleeve 141, an elastic retaining ring and / or a gasket is provided near the annular sleeve 141 on the driven wheel transmission shaft 13 to achieve axial limitation of the annular sleeve 141 on the transmission shaft, improve the positioning accuracy of the annular sleeve 141 on the driven wheel transmission shaft 13, and prevent it from moving axially.

[0120] On the basis of the above embodiment, the driven wheel assembly 10 provided in the embodiment of the present application further includes a return spring 16, and the return spring 16 is used to provide a restoring force to the second wheel disc 12. Fig. 9 When the driven wheel assembly 10 is at the maximum speed ratio, the rotation radius of the belt 20 in the driven wheel assembly 10 is the largest. Accordingly, the belt 20 is at the outermost side of the wheel groove of the driven wheel assembly 10. At this time, the return spring 16 is in the initial state.

[0121] When the rotation radius of the belt 20 on the driven wheel assembly 10 gradually decreases, the second wheel 12 needs to overcome the elastic force of the return spring 16 to move the second wheel 12 along the driven wheel transmission shaft 13 in a direction away from the first wheel 11 .

[0122] like Fig.10 As shown, when the driven wheel set 10 is at the minimum speed ratio, the rotation radius of the belt 20 in the driven wheel set 10 is the smallest, and accordingly, the belt 20 is at the innermost side of the wheel groove of the driven wheel set 10, and the return spring 16 is in a compressed state.

[0123] In order to optimize the layout of the driven wheel assembly 10, the transmission seat 14 of the embodiment of the present application can be used as a mounting seat for the return spring 16, that is, the return spring 16 is sleeved on the driven wheel transmission shaft 13, and one end of the return spring 16 abuts against the transmission seat 14, and the other end abuts against the second wheel plate 12, so that the second wheel plate 12 moves axially along the driven wheel transmission shaft 13 under the action of the return spring 16.

[0124] Specifically, the annular sleeve 141 is provided with an annular positioning groove 144 along its circumference, and the axial direction of the annular positioning groove 144 is consistent with the axial direction of the annular sleeve 141 , that is, an annular groove with a certain depth is provided on the end face of the annular sleeve 141 , and the annular groove is coaxial with the annular sleeve 141 .

[0125] The return spring 16 is sleeved on the driven wheel transmission shaft 13 , part of the return spring 16 is located in the annular positioning groove 144 , the end of the return spring 16 abuts against the bottom wall of the annular positioning groove 144 , and the other end of the return spring 16 abuts against the inner surface of the second wheel plate 12 .

[0126] It is understandable that, as needed, the inner surface of the second wheel disc 12 may also be provided with a positioning structure to ensure that the expansion and contraction direction of the return spring 16 is consistent with the axial direction of the driven wheel transmission shaft 13, thereby improving the stability of the second wheel disc 12 moving along the driven wheel transmission shaft 13.

[0127] like Figures 14 to 16 As shown, the speed change member 15 in the embodiment of the present application can abut against the rolling member 142 of the transmission seat 14 , thereby driving the transmission seat 14 to rotate, so as to transmit power to the transmission seat 14 .

[0128] Specifically, the speed change member 15 is provided with a limiting groove 151, and the limiting groove 151 cooperates with the rolling member 142. When the driven wheel assembly 10 is assembled, the rolling member 142 can be located in the limiting groove 151, and when the second wheel disc 12 rotates, the rolling member 142 can abut against the groove wall of the limiting groove 151, so that the rolling member 142 can rotate with the second wheel disc 12, that is, the power transmitted to the second wheel disc 12 is transmitted to the driven wheel transmission shaft 13 through the speed change member 15, the rolling member 142, and the annular sleeve 141, and drives the driven wheel transmission shaft 13 to rotate.

[0129] For example, the speed change member 15 includes a body and an annular side wall, the speed change member 15 is fixed on the second wheel plate 12 through the body, and the body is sleeved on the driven wheel transmission shaft 13 and rotates relative to the driven wheel transmission shaft 13. The annular side wall is located on one side of the body, and the length extension direction of the annular side wall is consistent with the axial direction of the driven wheel transmission shaft 13.

[0130] The annular side wall is provided with a notch to form a limiting groove 151, and the limiting groove 151 is adapted to the profile of the rolling element 142. For example, the limiting groove 151 is a circular groove, and its radius is greater than the radius of the rolling element 142, so that the rolling element 142 can roll along the groove wall of the limiting groove 151. It should be noted that the notch of the limiting groove 151 faces the first wheel disc 11, so that the rolling element 142 can extend into the limiting groove 151.

[0131] Further, the notch of the limiting groove 151 extends to the edge of the annular side wall through the introduction channel. Exemplarily, the annular side wall also has a guide bevel groove 152, which forms the introduction channel, and the guide bevel groove 152 is an arc groove obliquely arranged on the annular side wall. The guide bevel groove 152 extends along the axial direction of the driven wheel transmission shaft 13, one end of the guide bevel groove 152 extends to the edge of the annular side wall, and the other end of the guide bevel groove 152 is connected to the limiting groove 151, so that the rolling element 142 can move on the continuous side wall formed by the guide bevel groove 152 and the limiting groove 151.

[0132] It should be noted that the outline dimensions of the guide inclined groove 152 and the limiting groove 151 are larger than the outer diameter of the rolling element 142; the rolling element 142 can roll along the groove walls of the limiting groove 151 and the guide inclined groove 152. When the second wheel plate 12 moves relative to the driven wheel transmission shaft 13, the rolling element 142 can move along the side wall of the guide inclined groove 152, so that the rolling element 142 is always in contact with the limiting groove 151 and the guide inclined groove 152, ensuring the stability of the second wheel plate 12 in transmitting its power to the transmission seat 14.

[0133] Since the first wheel 11 is rotatably connected to the driven wheel transmission shaft 13 in the embodiment of the present application, the power on the first wheel 11 needs to be transmitted to the second wheel 12 and then transmitted to the driven wheel transmission shaft 13 through the transmission member 15 and the transmission seat 14 .

[0134] The continuously variable transmission 100 provided in the embodiment of the present application further includes a power transmission component 17 , which is connected to the first wheel disc 11 and can rotate synchronously with the first wheel disc 11 . The power transmission component 17 is used to transmit power to the second wheel disc 12 .

[0135] like Fig.17 As shown, combined with Fig.14 , Fig.15 The power transmission component 17 provided in the embodiment of the present application includes at least one slider 171, which is arranged on the side of the first wheel disc 11 facing the second wheel disc 12, and the second wheel disc 12 is provided with a guide groove 121 cooperating with the slider 171, and the slider 171 is embedded in the guide groove 121; along the circumferential direction of the second wheel disc 12, the slider 171 can abut against the groove wall of the guide groove 121.

[0136] For example, after the driven wheel group 10 is assembled, the slider 171 is located in the guide groove 121, and the two sides of the slider 171 maintain a certain distance from the groove wall of the guide groove 121; when the driven wheel group 10 starts to rotate, the first wheel plate 11 and the second wheel plate 12 rotate synchronously. During the rotation process, when the speed change member 15 contacts the rolling member 142 of the transmission seat 14, the rotation resistance generated at this time acts on the second wheel plate 12. Since the rotation resistance of the first wheel plate 11 is less than the rotation resistance of the second wheel plate 12, the first wheel plate 11 can be circumferentially deflected relative to the second wheel plate 12, and then the first wheel plate 11 drives the slider 171 to rotate relative to the second wheel plate 12, and the slider 171 can abut against the side wall of the guide groove 121.

[0137] With such an arrangement, when the driven wheel assembly 10 starts to rotate, since the rotational resistance of the first wheel 11 is different from that of the second wheel 12, the belt 20 may bend, which may easily cause damage to the belt 20. In the embodiment of the present application, when the forces on both sides of the belt 20 are uneven, the first wheel 11 may be circumferentially deflected relative to the second wheel 12 to prevent the belt 20 from being deflected, thereby increasing the service life of the belt 20.

[0138] Furthermore, when the driven wheel group 10 rotates, the slider 171 can abut against the guide groove 121, so that there is a positive pressure between the first wheel plate 11 and the second wheel plate 12, and a friction force is formed in the axial direction to hinder the axial movement of the first wheel plate 11 and the second wheel plate 12 on the driven wheel transmission shaft 13, so as to prevent the second wheel plate 12 from moving too fast when the all-terrain vehicle accelerates, that is, to prevent the groove width of the wheel groove of the driven wheel group 10 from changing too fast when the all-terrain vehicle accelerates, resulting in the input radius of the belt 20 on the driven wheel group 10 becoming rapidly smaller, and insufficient output torque occurs.

[0139] On the basis of the above-mentioned embodiment, the power transmission component 17 provided in the embodiment of the present application further includes a slider mounting frame 172, the slider mounting frame 172 is used to install the slider 171, and the slider mounting frame 172 is fixedly connected to the first wheel plate 11 by screws.

[0140] For example, the power transmission component 17 includes two sliders 171, and the slider mounting frame 172 includes two mounting ears, the two mounting ears are located at one end of the slider mounting frame 172, the two mounting ears are symmetrically arranged, and each mounting ear is respectively provided with a slider 171, that is, the two sliders 171 are symmetrically arranged at one end of the slider mounting frame 172. The other end of the slider mounting frame 172 is fixedly connected to the first wheel disc 11, so that the two sliders 171 can rotate synchronously with the first wheel disc 11. In this way, the two sliders 171 are symmetrically arranged on the slider mounting frame 172, which can improve the uniformity and stability of power transmission between the first wheel disc 11 and the second wheel disc 12.

[0141] Furthermore, the slider 171 provided in the embodiment of the present application can rotate relative to the slider mounting frame 172, and the rotation axis of the slider 171 is perpendicular to the axis of the driven wheel transmission shaft 13. For example, the slider 171 is mounted on the slider mounting frame 172 through a pin, and the slider 171 can rotate along the pin, and the axial direction of the pin is perpendicular to the axial direction of the driven wheel transmission shaft 13.

[0142] With such arrangement, when the slider mounting frame 172 is fixed to the first wheel disc 11, if there is a deviation in the installation between the two, the slider 171 will be tilted in the guide groove 121. When the slider 171 abuts against the groove wall of the guide groove 121, the slider 171 can rotate at a certain angle, thereby increasing the abutment area between the slider 171 and the groove wall of the guide groove 121, so that the power of the first wheel disc 11 can be evenly transmitted to the second wheel disc 12 through the slider 171.

[0143] It should be understood that the above-mentioned slider 171 can be a rectangular slider, and the length direction of the slider 171 is consistent with the extension direction of the guide groove 121, and the extension direction of the guide groove 121 is consistent with the axial direction of the driven wheel transmission shaft 13. Such a setting can further increase the contact area between the slider 171 and the groove wall of the guide groove 121, so that the power of the first wheel disc 11 can be evenly transmitted to the second wheel disc 12 through the slider 171.

[0144] Further, see Fig.14In the embodiment of the present application, the power transmission component 17 and the transmission seat 14 can be respectively located in different circumferential directions of the second wheel disc 12. For example, the two rectangular sliders 171 in the power transmission component 17 are symmetrically arranged on the second wheel disc 12, and the connecting line of the two rectangular sliders 171 extends along the first direction; the transmission seat 14 includes two symmetrically arranged rolling elements, and the connecting line between the two rolling elements extends along the second direction, and the first direction and the second direction are perpendicular; in other words, the rectangular sliders 171 and the rolling elements are staggered with each other along the circumferential direction of the second wheel disc 12. Such an arrangement can optimize the internal installation space of the driven wheel set.

[0145] like Fig.18 As shown, the second wheel disc 12 provided in the embodiment of the present application is further provided with a guide cylinder 122, which is located on the side of the second wheel disc 12 facing the first wheel disc 11, and the outer wall of the guide cylinder 122 is cylindrical, and the axial direction of the guide cylinder 122 is consistent with the axial direction of the driven wheel transmission shaft 13. The guide cylinder 122 is configured to be inserted into the cavity of the first wheel disc 11 to assist in guiding the second wheel disc 12 when it moves along the axial direction of the driven wheel transmission shaft 13, thereby improving the movement stability of the second wheel disc 12.

[0146] Furthermore, the surface of the outer wall of the guide cylinder 122 is a smooth surface, and the first wheel plate 11 is provided with a cylindrical light hole 111, and the guide cylinder 122 can be inserted into the cylindrical light hole 111; the outer wall surface of the guide cylinder 122 is matched with the inner wall clearance of the cylindrical light hole 111, and can ensure that the guide cylinder 122 slides axially along the driven wheel transmission shaft 13 in the cylindrical light hole 111; and when the driven wheel group 10 is in the state of minimum speed ratio, the belt 20 can keep in contact with the outer wall of the guide cylinder 122.

[0147] In the prior art, the first wheel 11 is fixedly connected to the driven wheel transmission shaft 13, and the first wheel 11 and the second wheel 12 are circumferentially limited and power is transmitted through a keyway structure. The outer wall of the guide cylinder 122 of the second wheel 12 has a keyway. When the belt 20 is in contact with the outer wall of the guide cylinder 122, the friction between the belt teeth of the belt 20 and the keyway makes the belt 20 easily damaged, and the debris generated by the belt 20 during operation will enter the interior of the driven wheel group 10 through the keyway, affecting the operating reliability of the driven wheel group 10.

[0148] Compared with the prior art, the outer wall surface of the guide cylinder 122 of the second wheel disc 12 in the embodiment of the present application is smooth, which can prevent the belt teeth of the belt 20 from being worn when the belt 20 is in contact with the outer wall of the guide cylinder 122; further, the outer wall surface of the guide cylinder 122 is gap-matched with the inner wall of the cavity of the first wheel disc 11, which can prevent the debris generated by the belt 20 during operation from entering the interior of the driven wheel group 10, thereby improving the operating reliability of the driven wheel group 10.

[0149] See also Figure 2 and Figure 3 In order to improve the heat dissipation performance of the continuously variable transmission 100, the embodiment of the present application further includes an air inlet pipe 41 and an air outlet pipe 42. The shell 40 is provided with an air inlet, which is connected to the air inlet pipe 41 to introduce air into the shell 40; the shell 40 is also provided with an air outlet, which is connected to the air outlet pipe 42 to lead the air after heat exchange to the outside of the shell 40.

[0150] For example, the housing 40 of the continuously variable transmission 100 may be provided with two air inlets, one of which is opposite to the driven wheel set 10 for cooling the driven wheel set 10 ; and the other is opposite to the driving wheel set 30 for cooling the driving wheel set 30 .

[0151] Accordingly, the continuously variable transmission 100 may be provided with an intake pipe 41, which has two branches and is connected to the two air inlets through the two branches; or the continuously variable transmission 100 may have two intake pipes 41, which are connected to the two air inlets respectively. One end of the outlet pipe 42 is connected to the outlet, and the other end of the outlet pipe 42 may be opposite to the exhaust pipe of the engine 300, and the air flowing out of the continuously variable transmission 100 may be used to cool the exhaust pipe.

[0152] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0153] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0154] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0155] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0156] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An all-terrain vehicle, comprising a frame, front and rear wheels supporting the frame, and a powertrain arranged on the frame, characterized in that: The powertrain includes a continuously variable transmission having a driving wheel set, a driven wheel set, a transmission member and a power transmission component; The driving wheel group transmits power to the driven wheel group through the transmission member, and the driven wheel group includes a first wheel disc, a second wheel disc, a transmission shaft, a speed change member and a transmission seat; the first wheel disc and the second wheel disc are both coaxially arranged with the transmission shaft, the first wheel disc and the second wheel disc are both rotated relative to the transmission shaft, and the second wheel disc can move axially along the transmission shaft; the two side disc surfaces facing each other of the first wheel disc and the second wheel disc are both inclined relative to the transmission shaft to jointly form a wheel groove for accommodating the transmission member, and the width of the wheel groove at the notch is greater than the groove width at the groove bottom of the wheel groove; The transmission seat is located between the first wheel disc and the second wheel disc, the transmission seat is connected to the transmission shaft and rotates synchronously with the transmission shaft, the second wheel disc is connected to the speed change member, and the speed change member is configured to drive the transmission seat to rotate so as to transmit power to the transmission shaft through the transmission seat; The power transmission component is connected to the first wheel disc, and the first wheel disc transmits power to the second wheel disc through the power transmission component, and the power transmission component and the transmission seat are respectively located in different circumferential directions of the second wheel disc; The transmission seat comprises an annular sleeve and at least one rolling element, wherein the annular sleeve is sleeved on the transmission shaft and rotates synchronously with the transmission shaft; the rolling element is rotatably arranged on the side of the annular sleeve, and the rotation axis of the rolling element and the axis of the transmission shaft have an angle, and the rolling element is configured to abut against the speed change element to transmit power to the second wheel plate; The speed change member has a limiting groove matched with the rolling member, and the rolling member and the groove wall of the limiting groove are matched and abutted to transmit power to the second wheel disc; The power transmission component includes a slider, which is arranged on the side of the first wheel disc facing the second wheel disc, and the second wheel disc is provided with a guide groove cooperating with the slider, and the slider is embedded in the guide groove; the slider is configured to rotate circumferentially relative to the second wheel disc and contact with the groove surface of the guide groove to drive the second wheel disc to rotate.

2. The all-terrain vehicle according to claim 1, characterized in that: The rotation axis of the rolling element and the axis of the transmission shaft are perpendicular to each other.

3. The all-terrain vehicle according to claim 2, characterized in that: The driven wheel set also includes a return spring; The return spring is sleeved on the transmission shaft, and one end of the return spring abuts against the transmission seat, and the other end abuts against the second wheel disc, so that the second wheel disc moves relatively along the axial direction of the transmission shaft.

4. The all-terrain vehicle according to claim 3, characterized in that: The annular sleeve is provided with an annular positioning groove, and the axial direction of the annular positioning groove is consistent with the axial direction of the annular sleeve; One end of the return spring abuts against the annular positioning groove, and the other end of the return spring abuts against the inner surface of the second wheel disc.

5. The all-terrain vehicle according to any one of claims 1 to 4, characterized in that: Splines or transmission teeth are arranged between the annular sleeve and the transmission shaft, and the annular sleeve and the transmission shaft are connected by transmission via the splines or the transmission teeth.

6. The all-terrain vehicle according to claim 5, characterized in that: The side wall of the annular sleeve is provided with a pin shaft; The axis of the pin shaft is perpendicular to the axis of the transmission shaft, and the rolling element is rotatably connected to the pin shaft.

7. The all-terrain vehicle according to claim 5, characterized in that: The transmission shaft is provided with an elastic retaining ring and / or a washer for axially limiting the annular sleeve.

8. The all-terrain vehicle according to any one of claims 1 to 4, characterized in that: A rolling bearing is provided between the first wheel disc and the transmission shaft, and the first wheel disc is rotatably connected to the transmission shaft through the rolling bearing; A sliding bearing is arranged between the second wheel disc and the transmission shaft, and the second wheel disc is connected to the transmission shaft through the sliding bearing.

9. The all-terrain vehicle according to claim 8, characterized in that: The speed change member comprises an annular side wall extending in the axial direction of the transmission shaft; The annular side wall is provided with a notch to form the limiting groove, and the notch of the limiting groove faces the first wheel disc so that the rolling element can extend into the limiting groove.

10. The all-terrain vehicle according to claim 9, characterized in that: The annular side wall also forms a guide chute; One end of the guiding inclined groove extends to the edge of the annular side wall, and the other end of the guiding inclined groove is communicated with the limiting groove.

11. The all-terrain vehicle according to claim 10, characterized in that: The outline dimensions of the guide inclined groove and the limiting groove are larger than the outline outer diameter of the rolling element; The rolling element can roll along the groove walls of the limiting groove and the guide inclined groove.

12. The all-terrain vehicle according to any one of claims 1 to 4, characterized in that: The power transmission assembly also includes a slider mounting bracket; The slider mounting frame is used to mount the slider, and the slider mounting frame is fixedly connected to the first wheel disc.

13. The all-terrain vehicle according to claim 12, characterized in that: The slider is mounted on the slider mounting frame via a pin, and the slider rotates relative to the slider mounting frame.

14. The all-terrain vehicle according to claim 13, characterized in that: The slider is a rectangular slider, and the extending direction of the guide groove is consistent with the axial direction of the transmission shaft.

15. The all-terrain vehicle according to any one of claims 1 to 4, characterized in that: The sliding block and the rolling element are staggered with each other in different circumferential directions of the second wheel disc.

16. The all-terrain vehicle according to any one of claims 1 to 4, characterized in that: The second wheel disc has a guide cylinder facing the first wheel disc, and the outer wall of the guide cylinder is cylindrical; The axial direction of the guide cylinder is consistent with the axial direction of the transmission shaft, and the guide cylinder is inserted into the cavity of the first wheel disc.

17. The all-terrain vehicle according to claim 16, characterized in that: The outer wall surface of the guide cylinder is a smooth surface, and the outer wall surface is gap-matched with the inner wall of the cavity.

18. The all-terrain vehicle according to claim 1, characterized in that: The powertrain also includes an engine and a gearbox; The engine is connected to the transmission shaft of the driving wheel set of the continuously variable transmission, and is used to input power to the driving wheel set; The gearbox is connected to the transmission shaft of the driven wheel set of the continuously variable transmission, and is used to receive the output power from the driven wheel set.

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