CN217422075U - Continuously variable transmission, engine assembly and all-terrain vehicle - Google Patents

Abstract

The application provides a continuously variable transmission, an engine assembly and an all-terrain vehicle, relates to the technical field of continuously variable transmissions and is used for solving the technical problem that the running stability of a driven wheel set is poor in the conventional continuously variable transmission; the second rim plate is connected with the gear change piece to the gear change piece can drive the transmission seat and rotate, and transmit power to the transmission shaft through the transmission seat. The application provides a continuously variable transmission will come from the output torque transmission of driving wheel group to driven wheelset through the transmission seat, can reduce the distance between the torque input point of driven wheelset and the torque output point of driven wheelset to promote driven wheelset operating stability.

Description

Continuously variable transmission, engine assembly and all-terrain vehicle

Technical Field

The application relates to the technical field of transmissions, in particular to a continuously variable transmission, an engine assembly and an all-terrain vehicle.

Background

In order to reduce the phenomena of impact, pause and the like during transmission, the continuously variable transmission is produced. Among them, a Continuously Variable Transmission (CVT) is widely used in all terrain vehicles, motorcycles, and other vehicles as a common Continuously Variable Transmission. The CVT continuously variable transmission generally includes a driving pulley set, a driven pulley set, and a belt, where the driving pulley set and the driven pulley set transmit power through the belt, and realize continuously variable transmission through automatic change of an output radius of the driving pulley set and an input radius of the driven pulley set.

Wherein, driven wheelset includes from the fixed rim plate of driving wheel, from driving wheel removal rim plate and from driving wheel output shaft, from fixed rim plate of driving wheel and from driving wheel transmission shaft fixed connection to can transmit the output torque who comes from driving wheelset to from the driving wheel transmission shaft, and transmit to the gearbox from the driving wheel transmission shaft.

However, in the above-described continuously variable transmission, a distance between a torque input point of the driven wheel set and a torque output point of the driven wheel set is large, which affects operational stability of the driven wheel set.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application provide a continuously variable transmission, an engine assembly and an all-terrain vehicle, which can improve the running stability of a driven wheel set.

In order to achieve the above object, the embodiments of the present application provide the following technical solutions:

a first aspect of an embodiment of the present application provides a continuously variable transmission, including a driving wheel set, a driven wheel set, and a transmission member; the driving wheel set transmits power to the driven wheel set through the transmission piece, and the driven wheel set comprises a first wheel disc, a second wheel disc, a transmission shaft, a speed change piece and a transmission seat; the first wheel disc and the second wheel disc are coaxially arranged with the transmission shaft, the first wheel disc and the second wheel disc rotate relative to the transmission shaft, the second wheel disc can axially move along the transmission shaft, and the first wheel disc and the second wheel disc jointly form a wheel groove for accommodating the transmission part; 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 synchronously rotates with the transmission shaft, the second wheel disc is connected with the speed change piece, and the speed change piece is configured to drive the transmission seat to rotate so as to transmit power to the transmission shaft through the transmission seat.

In an alternative embodiment, the actuator mount comprises 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 piece is rotatably arranged on one side of the annular sleeve, an included angle is formed between the rotating axis of the rolling piece and the axis of the transmission shaft, and the rolling piece is configured to abut against the speed changing piece so as to transmit power to the second wheel disc.

In an alternative embodiment, the axes of rotation of the rolling members and the shaft axis are perpendicular to each other.

In an alternative embodiment, the driven wheel set further comprises a return spring; the return spring is sleeved on the transmission shaft, one end of the return spring is abutted to the transmission seat, and the other end of the return spring is abutted to the second wheel disc, so that the second wheel disc moves along the axial direction of the transmission shaft relatively.

In an alternative embodiment, 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 is abutted to the annular positioning groove, and the other end of the return spring is abutted to the inner surface of the second wheel disc.

In an alternative embodiment, a spline or a gear is provided between the annular sleeve and the transmission shaft, and the annular sleeve and the transmission shaft are in transmission connection through the spline or the gear.

In an optional embodiment, a pin shaft is arranged on the side wall of the annular sleeve; the axis of the pin shaft is perpendicular to the axis of the transmission shaft, and the rolling part is rotatably connected to the pin shaft.

In an alternative embodiment, the drive shaft is provided with a circlip and/or a washer for axially limiting the annulus.

In an alternative 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 roller 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.

In an alternative embodiment, the transmission has a limit groove engaged with the rolling member, and the rolling member is engaged with a groove wall of the limit groove to transmit power to the second disk.

In an alternative embodiment, the transmission member includes an annular side wall extending in an axial direction of the drive 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 piece can extend into the limiting groove.

In an alternative embodiment, the annular side wall also forms a guide chute; one end of the guide chute extends to the edge of the annular side wall, and the other end of the guide chute is communicated with the limiting groove.

In an alternative embodiment, the profile dimensions of the guide chute and the limit groove are larger than the profile outer diameter of the rolling member; the rolling piece can roll along the groove walls of the limiting groove and the guide chute.

In an alternative embodiment, the continuously variable transmission further comprises a power conducting assembly connected to the first sheave; the first wheel disc transmits power to the second wheel disc through the power transmission assembly.

In an alternative embodiment, the power conducting assembly includes a slider; the sliding block is arranged on one side, facing the second wheel disc, of the first wheel disc, the second wheel disc is provided with a guide groove matched with the sliding block, and the sliding block is embedded in the guide groove; the sliding block is configured to rotate circumferentially relative to the second wheel disc and is in contact with the groove surface of the guide groove to drive the second wheel disc to rotate.

In an alternative embodiment, the power conducting assembly further comprises a slider mount; the slider mounting bracket is used for mounting the slider, and the slider mounting bracket is fixedly connected with the first wheel disc.

In an alternative embodiment, the slider is mounted on the slider mounting bracket by a pin, and the slider rotates relative to the slider mounting bracket.

In an alternative embodiment, the sliding block is a rectangular sliding block, and the extending direction of the guide groove is consistent with the axial direction of the transmission shaft.

In an alternative embodiment, the second wheel disc has a guide cylinder facing the first wheel disc, the outer wall of the guide cylinder being 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.

In an alternative embodiment, the outer side wall surface of the guide cylinder is smooth, and the outer side wall surface is in clearance fit with the inner wall of the cavity.

A second aspect of an embodiment of the present application provides an engine assembly including an engine, a transmission, and the continuously variable transmission of the first aspect.

A third aspect of an embodiment of the present application provides an all-terrain vehicle comprising the continuously variable transmission of the first aspect, or the engine assembly of the second aspect.

Compared with the related art, the continuously variable transmission, the engine assembly and the all-terrain vehicle provided by the embodiment of the application have the following advantages:

the continuously variable transmission, engine assembly and all-terrain vehicle that this application embodiment provided, wherein continuously variable transmission's driven wheelset is used for receiving the power (output torque) that comes from driving wheel group, and driven wheelset includes first rim plate, second rim plate, transmission shaft, variable speed spare and transmission seat, and wherein first rim plate, second rim plate all set up with the transmission shaft is coaxial, and both homogeneous phase are to the transmission shaft rotation. The transmission seat is arranged between the first wheel disc and the second wheel disc, is connected with the transmission shaft and synchronously rotates with the transmission shaft; the second wheel disc is connected with the speed change piece, and the speed change piece can drive the transmission seat to rotate to transmit power to the transmission shaft through the transmission seat.

Compared with the scheme that in the driven wheel set in the transmission in the related art, the fixed wheel disc of the driven wheel set is fixedly connected with the transmission shaft, namely the output torque from the driving wheel set is transmitted to the driven wheel set through the fixed wheel disc; the output torque that will come from the driving wheel group through the transmission gear in this application embodiment transmits to driven wheelset, and the transmission gear is located between first rim plate, the second rim plate, can reduce the distance between the torque input point of driven wheelset and the torque output point of driven wheelset to promote driven wheelset operating stability.

In addition to the technical problems addressed by the embodiments of the present disclosure, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems solved by the continuously variable transmission, the engine assembly, and the all-terrain vehicle provided by the embodiments of the present disclosure, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic illustration of an engine assembly according to an embodiment of the present disclosure;

FIG. 2 is an exploded schematic view of the continuously variable transmission of FIG. 1;

FIG. 3 is a schematic connection diagram of a driving wheel set, a driven wheel set and a transmission member according to an embodiment of the present disclosure;

FIG. 4 is a schematic illustration of a continuously variable transmission according to an embodiment of the present application in a maximum speed ratio;

FIG. 5 is a schematic diagram illustrating a state of a driving wheel set when the continuously variable transmission provided by the embodiment of the present application is in a minimum speed ratio;

FIG. 6 is a schematic diagram illustrating a state of a driven wheel set when the continuously variable transmission provided by the embodiment of the present application is in a minimum speed ratio;

FIG. 7 is a schematic illustration of a first angular split of a driven wheel set provided by an embodiment of the present application;

FIG. 8 is a second angular split schematic view of a driven wheel set provided by embodiments of the present application;

FIG. 9 is an exploded view of the embodiment of the present application showing the connection of the transmission base and the transmission shaft;

FIG. 10 is a first schematic view of the assembly of the slider, the rolling elements, and the second disk according to an embodiment of the present invention;

FIG. 11 is a second schematic assembly diagram of the slider, the rolling element, and the second wheel disc provided in the embodiment of the present application;

FIG. 12 is a schematic assembly view of the slider, the rolling elements and the transmission according to an embodiment of the present application;

FIG. 13 is an exploded view of the slider and slider mount connection provided in accordance with an embodiment of the present application;

fig. 14 is a schematic illustration of an insertion of a first wheel disc and a second wheel disc provided in an embodiment of the present application.

Description of reference numerals:

10-a driven wheel set;

11-a first wheel;

111-cylindrical unthreaded hole;

12-a second wheel;

121-a guide groove; 122-a guide cylinder;

13-driven wheel drive shaft;

14-a transmission seat;

141-an annular sleeve; 142-a rolling member; 143-a pin shaft; 144-annular positioning groove; 145-gear teeth;

15-a transmission;

151-limiting groove; 152-a guide chute;

16-a return spring;

17-a power conducting component;

171-a slide; 172-a slider mount;

18-rolling bearings;

20-a belt;

30-a driving wheel set;

31-driving wheel fixing wheel disc; 32-driving wheel moving wheel disc; 33-driving wheel transmission shaft; 34-driving wheel slope board; 35-a limiting block; 36-a speed change slider; 37-a return spring; 38-spring mount; 39-a stop collar;

40-a housing;

41-an air inlet pipe; 42-an air outlet pipe;

100-continuously variable transmission;

200-a gearbox;

300-engine.

Detailed Description

As described in the background art, the driven pulley set of the related art continuously variable transmission has a problem of poor operation stability, and the inventors have found that the reason for the problem is that the related art continuously variable transmission includes a driving pulley set, a driven pulley set, and a belt, and the driving pulley set and the driven pulley set transmit power through the belt; wherein driven wheelset includes from the fixed rim plate of driving wheel, from driving wheel removal rim plate and from driving wheel transmission shaft, from driving wheel fixed rim plate with from driving wheel transmission shaft fixed connection to can transmit the output torque who comes from the driving wheelset to from the driving wheel transmission shaft, and transmit to the gearbox from the driving wheel transmission shaft. However, the distance between the torque input point of the driven wheel set and the torque output point of the driven wheel set is large, which affects the operation stability of the driven wheel set.

To solve the above technical problem, an embodiment of the present application provides a continuously variable transmission, an engine assembly and an all-terrain vehicle, wherein the continuously variable transmission includes a driven wheel set, a driving wheel set, a speed change element and a transmission seat, wherein a first wheel disc and a second wheel disc of the driven wheel set are coaxially arranged with a transmission shaft, and both can rotate relative to the transmission shaft.

Furthermore, a transmission seat is arranged between the first wheel disc and the second wheel disc, and the transmission seat is connected with the transmission shaft and synchronously rotates with the transmission shaft; the second rim plate is connected with the gear change piece to the gear change piece can drive the transmission seat and rotate, and transmit power to the transmission shaft through the transmission seat. So set up the accessible transmission seat and will come from the output torque transmission of driving wheel group to driven wheelset, and the transmission seat is located between first rim plate and the second rim plate, can reduce the distance between the torque input point of driven wheelset and the torque output point of driven wheelset to promote driven wheelset operating stability.

In order to make the aforementioned objects, features and advantages of the embodiments of the present application more comprehensible, embodiments of the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1, the engine assembly provided in the embodiment of the present application is applied to an all-terrain vehicle, and it should be understood that the engine assembly provided in the embodiment of the present application is illustrated as being applied to an all-terrain vehicle, but is not meant to be limiting, for example, the engine assembly provided in the embodiment of the present application may also be applied to other vehicles.

The engine assembly provided by the embodiment of the application comprises an engine 300, a gearbox 200 and a continuously variable transmission 100, wherein the engine 300 is in transmission connection with the continuously variable transmission 100, when the engine 300 works, the reciprocating motion of a piston of the engine is converted into the rotating motion of a crankshaft through a crank-connecting rod mechanism, and the power is output to the continuously variable transmission 100 through the crankshaft.

As shown in fig. 2 and 3, the continuously variable transmission 100 according to the embodiment of the present disclosure includes a housing 40, and a driving wheel set 30, a driven wheel set 10 and a transmission member disposed 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 output power from an engine 300 and transmits the output power to the driven wheel set 10 through the transmission member.

For example, the transmission member in the embodiment of the present application may be the belt 20, the driving pulley set 30 and the driven pulley set 10 transmit power through the belt 20, and the stepless speed change is realized through the automatic change of the driving radius of the belt 20 on the driving pulley set 30 and the input radius of the belt 20 on the driven pulley set 10.

Furthermore, a driven wheel transmission shaft of the driven wheel set 10 is in transmission connection with a differential, and outputs power to the left end and the right end of the rear axle through the differential, and drives the rear wheels of the all-terrain vehicle to rotate. Furthermore, the transmission shaft of the driven wheel set 10 is in transmission connection with the front axle driving shaft of the gearbox 200, sequentially passes through the front axle driving shaft, the front transmission shaft, the front axle input shaft and the front driving axle, and then drives the left and right front wheels of the all-terrain vehicle through the left and right half shafts of the front axle.

Referring to fig. 4 to 6, when the continuously variable transmission 100 is in the maximum speed ratio state and the minimum speed ratio state, the structure of the driving pulley set 30 and the driven pulley set 10 and the operation process of the continuously variable transmission 100 will be described in detail in conjunction with the driving radius of the belt 20 on the driving pulley set 30 and the input radius of the belt 20 on the driven pulley set 10.

Referring to fig. 5, the driving wheel set 30 provided in the embodiment of the present application includes a driving wheel fixing wheel disc 31, a driving wheel moving wheel disc 32, a driving wheel transmission shaft 33 and a driving wheel slope board 34, wherein the driving wheel fixing wheel disc 31 is in transmission connection with the driving wheel transmission shaft 33 through a knurled inner hole, and the driving wheel fixing wheel disc and the driving wheel transmission shaft can synchronously rotate.

The driving wheel moving wheel disc 32 and the driving wheel slope plate 34 are oppositely arranged, and the driving wheel moving wheel disc 32 and the driving wheel slope plate 34 are respectively sleeved on the driving wheel transmission shaft 33. The driver ramp plate 34 is fixedly connected to the driver transmission shaft 33, and the driver ramp plate 34 rotates in synchronization with the driver transmission shaft 33. The driving wheel moving wheel disc 32 is provided with an inner hole matched with the driving wheel transmission shaft 33, a sliding bearing is arranged in the inner hole, and the driving wheel moving wheel disc 32 is sleeved on the driving wheel transmission shaft 33 through the sliding bearing.

The driving wheel slope plate 34 is connected with the driving wheel moving wheel disc 32 through a limiting block 35, one side of the limiting block 35 is fixed on the driving wheel slope plate 34, and the other side of the limiting block 35 is provided with a notch and is clamped with a guide rib of the driving wheel moving wheel disc 32 through the notch.

The extending direction of the guide rib of the driving wheel moving wheel disc 32 is consistent with the circumferential direction of the driving wheel transmission shaft 33, and the extending direction of the notch is consistent with the axial direction of the driving wheel transmission shaft 33; when the drive wheel moving sheave 32 moves relative to the drive wheel transmission shaft 33, the sliding direction of the drive wheel moving sheave 32 can be limited by the stopper 35. It should be noted that a plurality of limit blocks 35 may be disposed between the driver ramp plate 34 and the driver moving wheel disc 32, and the plurality of limit blocks 35 are circumferentially disposed on the driver ramp plate 34.

An accommodating groove is formed between the driving wheel slope plate 34 and the driving wheel moving wheel disc 32, a return spring 37 and a spring mounting seat 38 are arranged in the accommodating groove, wherein the spring mounting seat 38 is sleeved on the driving wheel transmission shaft 33, and the spring mounting seat 38 is mounted 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.

The spring mounting seat 38 is disposed between the driving wheel slope plate 34 and the driving wheel moving wheel disk 32, and one side of the spring mounting seat 38 close to the driving wheel moving wheel disk 32 is fixedly connected with the driving wheel moving wheel disk 32 through screws, so that the two can synchronously move or rotate relative to the driving wheel transmission shaft 33.

Reset spring 37 sets up in the cavity of spring mount 38, and reset spring 37's one end and the shaft shoulder butt of action wheel transmission shaft 33 to carry out axial spacing to reset spring 37's one end. 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 changes in extension and contraction, the spring mounting seat 38 can move in the axial direction relative to the drive wheel transmission shaft 33.

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

The driving pulley set 30 in the embodiment of the present application includes a plurality of shift sliders 36, the shift sliders 36 are uniformly distributed on the driving pulley ramp plate 34 along the circumferential direction, and under the action of the return spring 37, the shift sliders 36 are pressed between the driving pulley ramp plate 34 and the driving pulley moving disk 32.

Because the rotation speeds of the driving wheel transmission shaft 33 are different and 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 the position thereof, and further change the position of the driving wheel moving wheel disc 32 on the driving wheel transmission shaft 33. It should be noted that the driving wheel moving pulley 32 and the driving wheel fixing pulley 31 have opposite tapered surfaces to form a V-shaped pulley groove therebetween, and accordingly, the belt 20 may be a V-shaped belt. The pulley groove is used for accommodating the belt 20, and the position of the belt 20 in the pulley groove changes along with the change of the rotating speed of the driving wheel transmission shaft 33.

Referring to fig. 4, when the engine 300 is in an idle state, the centrifugal force of the shift slider 36 is not enough to overcome the elastic force of the return spring 37, the belt 20 is pressed against the surface of the friction rotating sleeve, and the friction rotating sleeve is sleeved on the driving wheel transmission shaft 33, and part of the friction rotating sleeve is positioned in the wheel groove. The drive pulley moving sheave 32 is now in the initial maximum ratio position, i.e. the drive radius of the belt 20 at the drive pulley set 30 is at a minimum, and thus the input radius of the belt 20 at the driven pulley set 10 is at a maximum.

Referring to fig. 5 and 6, when the engine 300 is accelerated from the idle state, the centrifugal force applied to the shift slider 36 is also increased continuously, the shift slider 36 uses the driving wheel slope plate 34 as a 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 one side of the driving wheel fixed wheel disc 31, the side surface of the belt 20 is in contact with the driving wheel moving wheel disc 32 gradually, on one hand, the friction force of the belt 20 after being squeezed is increased gradually, and the driving wheel set 30 drives the belt 20 to rotate.

On the other hand, as the driving wheel moving wheel disc 32 is pushed by the speed changing slider 36, the driving wheel moving wheel disc 32 moves axially along the driving wheel shaft, and the belt 20 correspondingly moves up and down in the V-shaped wheel groove formed between the driving wheel fixing wheel disc 31 and the driving wheel moving wheel disc 32, so as to control the moving driving radius of the belt 20. When the thrust surface of the spring mounting seat 38 contacts the stop collar 39, the shifting slider 36 is limited in displacement, and the transmission ratio of the continuously variable transmission 100 is at a minimum, i.e., the driving radius of the belt 20 on the driving pulley set 30 is at a maximum, and the input radius of the belt 20 on the driven pulley set 10 is at a minimum.

With continued reference to fig. 6, the driven wheel set 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 transmission 15 and a transmission seat 14; wherein, first rim plate 11, second rim plate 12 have conical surface relative to each other, and first rim plate 11 and second rim plate 12 all set up with following driving shaft 13 is coaxial to first rim plate 11 and second rim plate 12 rotate respectively and connect on following driving shaft 13.

Specifically, the inner hole of the first wheel disc 11 is provided with a rolling bearing 18, this rolling bearing 18 may 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 circumferentially rotate relative to the driven wheel transmission shaft 13, but the first wheel disc 11 cannot move along the axial direction of the driven wheel transmission shaft 13, so that the first wheel disc 11 may be defined as a driven wheel fixed wheel disc.

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 not only can rotate circumferentially relative to the driven wheel transmission shaft 13, but also can move along the axial direction of the driven wheel transmission shaft 13, and thus the second wheel disc 12 can be defined as a driven wheel moving wheel disc.

First rim plate 11 and second rim plate 12 in this application embodiment have the conical surface that sets up each other relatively mutually, and can form the race that holds belt 20 between the conical surface of first rim plate 11 and second rim plate 12, and the both sides quotation that faces each other of first rim plate 11 and second rim plate 12 promptly all sets up from driving wheel transmission shaft 13 slope to constitute the race that is used for holding the belt jointly. The wheel groove can be a V-shaped groove, and the width of the position of the wheel groove close to the driven wheel transmission shaft 13 is smaller than the width of the outermost side of the wheel groove, namely the width of the groove opening of the wheel groove is larger than the groove width of the groove bottom of the wheel groove; accordingly, the belt 20 may be a V-belt.

Two side surfaces of the belt 20 are respectively contacted with the tapered surfaces of the first wheel disc 11 and the second wheel disc 12, and when the driven wheel set 10 is driven by the belt 20 to rotate, friction force 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 on the wheel groove is gradually changed, and the input radius of the belt 20 on the driven wheel set 10 is changed. Accordingly, the second disk 12 can be moved in the axial direction during this process to change the relative positions of the first disk 11 and the second disk 12.

With continued reference to fig. 6, the driving seat 14 in the embodiment of the present application is located between the first wheel disc 11 and the second wheel disc 12, and the driving seat 14 is in driving connection with the driven wheel transmission shaft 13, and both can rotate synchronously. The transmission seat 14 is used for receiving power from a transmission member 15, the transmission member 15 is fixedly connected with the second wheel disc 12, and the transmission member 15 can move axially or rotate circumferentially along with the second wheel disc 12 relative to the driven wheel transmission shaft 13.

For example, the transmission member 15 is sleeved on the driven wheel transmission shaft 13, and a sliding bearing is arranged between the transmission member 15 and the driven wheel transmission shaft 13, so that the transmission member 15 can rotate and move around the driven wheel transmission shaft 13; further, the transmission member 15 is fixed to one side of the second disk 12 by screws so as to rotate or move synchronously.

Further, transmission 15 in this application embodiment can drive transmission seat 14 and rotate, and transmission 15 can transmit power to transmission seat 14, and then transmits power to driven wheel transmission shaft 13 through transmission seat 14, and the input torque that receives from driven wheel set 10 is spread out through driven wheel transmission shaft 13 promptly.

When the input torque of the driving wheel set 30 is transmitted to the driven wheel set 10 through the transmission member, the transmission member can drive the first wheel disc 11 and the second wheel disc 12 to rotate, transmit power to the transmission seat 14 through the speed changing member 15, transmit the power to the driven wheel transmission shaft 13 through the transmission seat 14, and drive the driven wheel transmission shaft 13 to rotate.

Compared to the prior art transmission that transmits the output torque from the driving wheel set 30 to the driven wheel set 10 through a fixed sheave; the output torque that will come from main driving wheel group 30 is transmitted to driven wheelset 10 through driving seat 14 in this application embodiment, and driving seat 14 is located between first rim plate 11, the second rim plate 12, can reduce the distance between the torque input point of driven wheelset 10 and the torque output point of driven wheelset 10 to promote driven wheelset 10 operating stability.

As shown in fig. 7 to 9, the driving 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 in transmission connection with the driven wheel transmission shaft 13, and the annular sleeve and the driven wheel transmission shaft can synchronously rotate.

The rolling element 142 is rotatably disposed at a side of the annular sleeve 141, i.e., the rolling element 142 is disposed at a side of the annular sleeve 141. The rolling part 142 can rotate relative to the annular sleeve 141, and the rotating axis of the rolling part 142 and the axis of the driven wheel transmission shaft 13 form an included angle which can be 90 degrees, that is to say, the rotating axis of the rolling part 142 and the axis of the driven wheel transmission shaft 13 are mutually perpendicular, so that when the rolling part 142 is stressed, the force transmission effect can be improved, and the annular sleeve 141 and the rolling part 142 can rotate synchronously.

Further, the rolling member 142 is configured to abut against the transmission 15 to receive power from the second sheave 12. Specifically, the transmission member 15 can abut against the rolling member 142 when rotating, and can drive the rolling member 142 to rotate along with the transmission member 15, that is, when the transmission member 15 rotates, the power on the transmission member 15 can be transmitted to the rolling member 142 and transmitted to the annular sleeve 141 through the rolling member 142, so as to drive the driven wheel transmission shaft 13 to rotate.

For example, the driving seat 14 provided in the embodiment of the present application may include an annular sleeve 141 and two rolling members 142, a spline or driving tooth 145 is provided between the annular sleeve 141 and the driven wheel transmission shaft 13, and the two are in driving connection through the spline or driving tooth 145, that is, power applied to the annular sleeve 141 can be transmitted to the driven wheel transmission shaft 13 through the spline or driving tooth 145, so as to drive the driven wheel transmission shaft 13 to rotate.

The rolling members 142 may be rollers, the two rolling members 142 may be symmetrically disposed on two sides of the annular sleeve 141, two sides of the annular sleeve 141 are respectively provided with a pin 143 for mounting the rolling members 142, and a mounting direction of the pin 143 is perpendicular to an axial direction of the driven wheel transmission shaft 13, that is, an axis of the pin 143 is perpendicular to an axis of the driven wheel transmission shaft 13.

One end of the pin 143 is fixedly connected with the annular sleeve 141, the rolling member 142 is rotatably mounted on the pin 143, and the rotation axis of the rolling member 142 is perpendicular to the axis of the driven wheel transmission shaft 13. By such arrangement, the annular sleeve 141 can be stressed uniformly, so as to ensure the stability of the rotation of the annular sleeve 141 and prevent the occurrence of eccentricity.

In order to further improve the stability of the rotation of the annular sleeve 141, a circlip and/or a gasket is arranged at a position of the driven wheel transmission shaft 13 close to the annular sleeve 141, so as to realize axial limit 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 the annular sleeve 141 from moving along the axial direction.

On the basis of the above embodiments, the driven wheel set 10 provided in the embodiment of the present application further includes a return spring 16, and the return spring 16 is configured to provide a return force to the second sheave 12. Referring to fig. 4, when the driven pulley set 10 is at the maximum speed ratio, the belt 20 has the largest radius of rotation in the driven pulley set 10, and accordingly, the belt 20 is located at the outermost side of the pulley groove of the driven pulley set 10, and the return spring 16 is in the initial state.

When the rotation radius of the belt 20 in the driven pulley set 10 becomes smaller, the second pulley 12 must overcome the elastic force of the return spring 16 so that the second pulley 12 moves along the driven pulley transmission shaft 13 in a direction away from the first pulley 11.

As shown in fig. 6, when the driven wheel set 10 is at the minimum speed ratio, the rotation radius of the belt 20 at the driven wheel set 10 is minimum, and accordingly, the belt 20 is at the innermost side of the race of the driven wheel set 10, and the return spring 16 is in a compressed state.

For the overall arrangement of optimizing driven wheelset 10, this application embodiment transmission 14 can regard as return spring 16's mount pad, that is to say return spring 16 cover establishes on driven wheel transmission shaft 13, and return spring 16's one end and transmission 14 butt, the other end and the butt of second rim plate 12 to make second rim plate 12 under return spring 16's effect, second rim plate 12 is along the axial displacement from driven wheel transmission shaft 13.

Specifically, the annular sleeve 141 is provided with an annular positioning groove 144 along the circumferential direction thereof, and the axial direction of the annular positioning groove 144 coincides with the axial direction of the annular sleeve 141, that is, an annular groove having a certain depth is provided on the end surface of the annular sleeve 141, and the annular groove is coaxial with the annular sleeve 141.

The return spring 16 is sleeved on the driven wheel transmission shaft 13, part of the return spring 16 is positioned in the annular positioning groove 144, the end part of the return spring 16 is abutted against the bottom wall of the annular positioning groove 144, and the other end of the return spring 16 is abutted against the inner surface of the second wheel disc 12.

It can be understood that, the inner surface of the second wheel disc 12 may also be provided with a positioning structure as required to ensure that the extending and retracting direction of the return spring 16 is consistent with the axial direction of the driven wheel transmission shaft 13, so as to improve the stability of the second wheel disc 12 moving along the driven wheel transmission shaft 13.

As shown in fig. 10 to 12, the transmission member 15 in the embodiment of the present application can abut against the rolling members 142 of the transmission seat 14, so as to drive the transmission seat 14 to rotate, so as to transmit power to the transmission seat 14.

Specifically, the transmission 15 is provided with a stopper groove 151, and the stopper groove 151 is engaged with the rolling member 142. When the assembly of the driven wheel set 10 is completed, the rolling member 142 may be located in the limiting groove 151, and when the second wheel disc 12 rotates, the rolling member 142 may abut against a groove wall of the limiting groove 151, so that the rolling member 142 may rotate along 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 changing member 15, the rolling member 142, and the annular sleeve 141, and drives the driven wheel transmission shaft 13 to rotate.

For example, the transmission member 15 includes a body and an annular sidewall, the transmission member 15 is fixed on the second wheel disc 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 at one side of the body and has a length extending in a direction that coincides with the axial direction of the driven wheel drive shaft 13.

The annular side wall is notched to form a retaining groove 151, and the retaining groove 151 conforms to the contour of the rolling member 142. For example, the catching groove 151 is a circular groove having a radius larger than that of the rolling member 142 so that the rolling member 142 can roll along the groove wall of the catching 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 extends into the limiting groove 151.

Further, the notch of the stopper groove 151 extends to the edge of the annular side wall through the introduction passage. Illustratively, the annular side wall further has a guide chute 152, the guide chute 152 forms a guide channel, and the guide chute 152 is an arc-shaped groove obliquely arranged on the annular side wall. The guide inclined groove 152 extends in the axial direction of the driven wheel drive shaft 13, one end of the guide inclined groove 152 extends to the edge of the annular side wall, and the other end of the guide inclined groove 152 communicates with the stopper groove 151, so that the rolling member 142 can move on the continuous side wall formed by the guide inclined groove 152 and the stopper groove 151.

It should be noted that the profile dimensions of the guide chute 152 and the limit groove 151 are larger than the profile outer diameter of the rolling member 142; the rolling member 142 can roll along the groove walls of the limiting groove 151 and the guide chute 152. When the second wheel disc 12 moves relative to the driven wheel transmission shaft 13, the rolling member 142 can move along the side wall of the guide chute 152, so that the rolling member 142 is always abutted against the limiting groove 151 and the guide chute 152, and the stability of the second wheel disc 12 in transmitting the power thereof to the transmission seat 14 is ensured.

Because first rim plate 11 of this application embodiment rotates to be connected on driven driving shaft 13, consequently the power on the first rim plate 11 needs transmit to second rim plate 12 on, transmits to driven driving shaft 13 again through gear change 15, transmission case 14 on.

The continuously variable transmission 100 provided by the embodiment of the application further comprises a power transmission assembly 17, the power transmission assembly 17 is connected to the first pulley 11, the power transmission assembly 17 can rotate synchronously with the first pulley 11, and the power transmission assembly 17 is used for transmitting power to the second pulley 12.

As shown in fig. 13, in conjunction with fig. 10 and 11, the power transmission assembly 17 according to the embodiment of the present application includes at least one sliding block 171, the sliding block 171 is disposed on a side of the first wheel disc 11 facing the second wheel disc 12, the second wheel disc 12 is provided with a guide groove 121 engaged with the sliding block 171, and the sliding block 171 is embedded in the guide groove 121; the slider 171 may abut against the groove wall of the guide groove 121 in the circumferential direction of the second disk 12.

For example, when the driven wheel set 10 is assembled, the sliding block 171 is located in the guide groove 121, and both sides of the sliding block 171 keep a certain interval with the groove wall of the guide groove 121; when driven wheelset 10 starts to rotate, first rim plate 11, second rim plate 12 synchronous rotation, when rotating the rolling piece 142 contact of in-process gear change 15 and transmission 14, the rotational resistance that produces this moment acts on second rim plate 12, because the rotational resistance of first rim plate 11 is less than the rotational resistance of second rim plate 12, first rim plate 11 second rim plate 12 circumference deflection relatively, and then first rim plate 11 drives the relative second rim plate 12 rotation of slider 171, slider 171 can with the lateral wall butt of guide way 121.

So set up, when driven wheelset 10 starts the rotation, because the rotation resistance of first rim plate 11 is different with the rotation resistance of second rim plate 12, the amount of deflection appears in belt 20, causes belt 20 to damage easily, and when the both sides atress of belt 20 was uneven in this application embodiment, first rim plate 11 can be relative second rim plate 12 circumference deflection to prevent that belt 20 from appearing the amount of deflection, promote belt 20's life.

Furthermore, when the driven wheel set 10 rotates, the sliding block 171 can abut against the guiding groove 121, so that a positive pressure is formed between the first wheel disc 11 and the second wheel disc 12, and a friction force along the axial direction is formed, so as to block the axial movement of the first wheel disc 11 and the second wheel disc 12 on the driven wheel transmission shaft 13, and it can be avoided that the second wheel disc 12 moves too fast when the all-terrain vehicle speeds up, that is, the groove width of the wheel groove of the driven wheel set 10 changes too fast when the all-terrain vehicle speeds up, so that the input radius of the belt 20 on the driven wheel set 10 is rapidly reduced, and the situation of insufficient output torque occurs.

On the basis of the above embodiment, the power transmission assembly 17 provided by the embodiment of the present application further includes a slider mounting bracket 172, the slider mounting bracket 172 is used for mounting the slider 171, and the slider mounting bracket 172 and the first wheel disc 11 are fixedly connected together by screws.

For example, the power conducting assembly 17 includes two sliding blocks 171, the sliding block mounting bracket 172 includes two mounting lugs, the two mounting lugs are located at one end of the sliding block mounting bracket 172, the two mounting lugs are symmetrically arranged, and each mounting lug is provided with one sliding block 171, that is, the two sliding blocks 171 are symmetrically arranged at one end of the sliding block mounting bracket 172. The other end of the slider mounting bracket 172 is fixedly connected to the first wheel 11, so that the two sliders 171 can rotate synchronously with the first wheel 11. So set up, two slider 171 symmetries set up on slider mounting bracket 172, can promote first rim plate 11 and second rim plate 12 power transmission's homogeneity and stability.

Further, the sliding block 171 provided in the embodiment of the present application can rotate relative to the sliding block mounting frame 172, and the rotation axis of the sliding block 171 is perpendicular to the axis of the driven wheel transmission shaft 13. For example, the slider 171 is mounted on the slider mounting bracket 172 by a pin, and the slider 171 is rotatable along the pin, the axial direction of which is perpendicular to the axial direction of the driven wheel transmission shaft 13.

With this arrangement, when the slider mounting bracket 172 is fixed to the first wheel disc 11, if there is a deviation in the mounting between the two, the slider 171 is inclined in the guide groove 121, and when the slider 171 abuts against the groove wall of the guide groove 121, the slider 171 can rotate by a certain angle, so that the abutting area of the slider 171 against the groove wall of the guide groove 121 is increased, and the power of the first wheel disc 11 can be uniformly transmitted to the second wheel disc 12 through the slider 171.

It should be understood that the sliding block 171 may be a rectangular sliding block, and the length direction of the sliding block 171 is consistent with the extending direction of the guiding groove 121, and the extending direction of the guiding groove 121 is consistent with the axial direction of the driven wheel transmission shaft 13, so as to further increase the abutting area between the sliding block 171 and the groove wall of the guiding groove 121, and enable the power of the first wheel disc 11 to be uniformly transmitted to the second wheel disc 12 through the sliding block 171.

Further, referring to fig. 10, in the embodiment of the present application, further referring to fig. 10, the power transmission assembly 17 and the transmission seat 14 in the embodiment of the present application may be respectively located in different circumferential directions of the second wheel 12, for example, two rectangular sliding blocks 171 in the power transmission assembly 17 are symmetrically arranged on the second wheel 12, and a connecting line of the two rectangular sliding blocks 171 extends along the first direction; the transmission seat 14 comprises two rolling members symmetrically arranged, a connecting line between the two rolling members extends along a second direction, and the first direction is perpendicular to the second direction; in other words, the rectangular slider 171 and the rolling elements are arranged offset from each other in the circumferential direction of the second roulette plate 12. So set up, can optimize the interior installation space of driven wheelset.

The power transmission assembly 17 and the transmission seat 14 may be respectively located in different circumferential directions of the second wheel 12, for example, two rectangular sliding blocks 171 in the power transmission assembly 17 are symmetrically arranged on the second wheel 12, and a connecting line of the two rectangular sliding blocks 171 extends along the first direction; the transmission seat 14 comprises two rolling members symmetrically arranged, a connecting line between the two rolling members extends along a second direction, and the first direction is perpendicular to the second direction; in other words, the rectangular slider 171 and the rolling elements are arranged offset from each other in the circumferential direction of the second disk 12. So set up, can optimize the interior installation space of driven wheelset.

As shown in fig. 14, the second wheel disc 12 provided in the embodiment of the present application is further provided with a guide cylinder 122, the guide cylinder 122 is located on one side of the second wheel disc 12 facing the first wheel disc 11, an outer wall of the guide cylinder 122 is cylindrical, and an axial direction of the guide cylinder 122 is consistent with an axial direction of the driven wheel transmission shaft 13. The guide cylinder 122 is configured to be capable of being inserted into a cavity of the first wheel disc 11 to assist in guiding the second wheel disc 12 when moving in the axial direction of the driven wheel transmission shaft 13, so as to improve the movement stability of the second wheel disc 12.

Further, the surface of the outer wall of the guide cylinder 122 is a smooth surface, the first wheel disc 11 is provided with a cylindrical unthreaded hole 111, and the guide cylinder 122 can be inserted into the cylindrical unthreaded hole 111; the outer wall surface of the guide cylinder 122 is in clearance fit with the inner wall of the cylindrical unthreaded hole 111, and the guide cylinder 122 can be ensured to slide in the cylindrical unthreaded hole 111 along the axial direction of the driven wheel transmission shaft 13; and the belt 20 can be kept in contact with the outer wall of the guide cylinder 122 when the driven wheel set 10 is in the state of the minimum speed ratio.

First rim plate 11 among the prior art and from driving wheel transmission shaft 13 fixed connection, carry out circumference spacing and transmission power through the keyway structure between first rim plate 11 and the second rim plate 12, the outer wall of the guide cylinder 122 of second rim plate 12 has the keyway, when the belt 20 is laminated with the outer wall of guide cylinder 122, the area of taking the tooth of belt 20 leads to belt 20 to damage easily with the keyway friction, and the piece that belt 20 produced in the operation process can get into the inside of driven wheelset 10 through the keyway, influence driven wheelset 10 operational reliability.

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, so that the belt teeth of the belt 20 can be prevented from being worn when the belt 20 is attached to the outer wall of the guide cylinder 122; further, the outer wall surface of the guide cylinder 122 is in clearance fit with the inner wall of the cavity of the first wheel disc 11, so that the chips generated by the belt 20 in the operation process can be prevented from entering the interior of the driven wheel set 10, and the operation reliability of the driven wheel set 10 is improved.

Referring to fig. 1 and 2, in order to improve the heat dissipation performance of the continuously variable transmission 100 according to the embodiment of the present disclosure, the continuously variable transmission 100 further includes an air inlet pipe 41 and an air outlet pipe 42, the housing 40 is provided with an air inlet, and the air inlet is communicated with the air inlet pipe 41 to introduce air into the housing 40; the housing 40 is further provided with an air outlet, which is communicated with the air outlet pipe 42 and used for leading out the air after heat exchange to the outside of the housing 40.

For example, the housing 40 of the continuously variable transmission 100 may be provided with two air inlets, one of which is opposed to the driven wheel set 10 for cooling the driven wheel set 10; the other air inlet is opposite to the driving wheel set 30 and used for cooling the driving wheel set 30; accordingly, the continuously variable transmission 100 may be provided with one intake pipe 41, and one intake pipe 41 has two branches and is respectively communicated with the two intake ports through the two branches; or the continuously variable transmission 100 has two intake pipes 41, and the two intake pipes 41 communicate with the two intake ports, respectively. One end of the air outlet pipe 42 is communicated with the air outlet, the other end of the air outlet pipe 42 may be opposite to an 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.

The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

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

Furthermore, spatially relative terms, such as "under," "below," "beneath," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's illustrated relationship to another element or feature. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may have other orientations (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly as well.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (22)

1. A continuously variable transmission is characterized by comprising a driving wheel set, a driven wheel set and a transmission piece;

the driving wheel set transmits power to the driven wheel set through the transmission piece, and the driven wheel set comprises a first wheel disc, a second wheel disc, a transmission shaft, a speed change piece and a transmission seat; the first wheel disc and the second wheel disc are coaxially arranged with the transmission shaft, the first wheel disc and the second wheel disc rotate relative to the transmission shaft, the second wheel disc can axially move along the transmission shaft, and the first wheel disc and the second wheel disc jointly form a wheel groove for accommodating the transmission part;

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 synchronously rotates with the transmission shaft, the second wheel disc is connected with the speed change piece, and the speed change piece is configured to drive the transmission seat to rotate so as to transmit power to the transmission shaft through the transmission seat.

2. The variable transmission of claim 1, wherein the carrier comprises 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 piece is rotatably arranged on the side of the annular sleeve, an included angle is formed between the rotating axis of the rolling piece and the axis of the transmission shaft, and the rolling piece is configured to abut against the speed changing piece so as to transmit power to the second wheel disc.

3. The variable transmission of claim 2, wherein the axes of rotation of the rolling members and the axis of the drive shaft are perpendicular to each other.

4. The variable transmission of claim 3, wherein the driven wheel set further comprises a return spring;

the return spring is sleeved on the transmission shaft, one end of the return spring is abutted to the transmission seat, and the other end of the return spring is abutted to the second wheel disc, so that the second wheel disc moves along the axial direction of the transmission shaft relatively.

5. The variable transmission of claim 4, wherein the annular sleeve is provided with an annular positioning groove having an axial direction that coincides with an axial direction of the annular sleeve;

one end of the return spring is abutted to the annular positioning groove, and the other end of the return spring is abutted to the inner surface of the second wheel disc.

6. The variable transmission of any one of claims 2 to 5, wherein splines or gearing teeth are provided between the annular sleeve and the drive shaft and are in driving connection via the splines or gearing teeth.

7. The variable transmission of claim 6, wherein a sidewall of the annular sleeve is provided with a pin;

the axis of the pin shaft is perpendicular to the axis of the transmission shaft, and the rolling part is rotatably connected to the pin shaft.

8. Continuously variable transmission according to claim 6, characterized in that the drive shaft is provided with circlips and/or washers for axial limitation of the annulus.

9. The variable transmission of any one of claims 1 to 5, wherein a rolling bearing is disposed between the first disk and the drive shaft, and the first disk is rotatably connected to the drive shaft through the rolling bearing;

and 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.

10. The variable transmission of any one of claims 2 to 5, wherein the transmission has a limit groove that cooperates with the rolling member, and the rolling member cooperates with a groove wall of the limit groove to abut to transmit power to the second sheave.

11. The variable transmission of claim 10, wherein the transmission member includes an annular sidewall extending in an axial direction of the propeller 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 piece can extend into the limiting groove.

12. The variable transmission of claim 11, wherein the annular sidewall further forms a guide chute;

one end of the guide chute extends to the edge of the annular side wall, and the other end of the guide chute is communicated with the limiting groove.

13. The variable transmission of claim 12, wherein the guide chute and the retaining groove have a profile dimension greater than a profile outer diameter of the roller;

the rolling piece can roll along the groove walls of the limiting groove and the guide chute.

14. The variable transmission of any one of claims 1-5, further comprising a power conducting assembly connected to the first sheave;

the first wheel disc transmits power to the second wheel disc through the power transmission assembly.

15. The variable transmission of claim 14, wherein the power conducting assembly comprises a slider;

the sliding block is arranged on one side, facing the second wheel disc, of the first wheel disc, the second wheel disc is provided with a guide groove matched with the sliding block, and the sliding block is embedded in the guide groove;

the sliding block is configured to rotate circumferentially relative to the second wheel disc and is in contact with the groove surface of the guide groove to drive the second wheel disc to rotate.

16. The variable transmission of claim 15, wherein the power conducting assembly further comprises a slider mount;

the slider mounting bracket is used for mounting the slider, and the slider mounting bracket is fixedly connected with the first wheel disc.

17. The variable transmission of claim 16, wherein the slide block is mounted on the slide block mounting bracket by a pin, and the slide block rotates relative to the slide block mounting bracket.

18. The variable transmission of claim 17, wherein the slider is a rectangular slider, and the guide groove extends in the same direction as the axial direction of the transmission shaft.

19. The variable transmission of any one of claims 1 to 5, wherein the second sheave has a guide cylinder facing the first sheave, an outer wall of the guide cylinder being 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.

20. The variable transmission of claim 19, wherein an outer sidewall surface of the guide cylinder is smooth and the outer sidewall surface is a clearance fit with an inner wall of the cavity.

21. An engine assembly comprising an engine, a gearbox and a continuously variable transmission as claimed in any one of claims 1 to 20.

22. An all-terrain vehicle comprising the continuously variable transmission of any one of claims 1-20, or the engine assembly of claim 21.

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