阅读说明：本技术 变径轮组组件及无级变速器 (Reducing wheel set assembly and continuously variable transmission ) 是由 陈浩鑫 于 2021-10-19 设计创作，主要内容包括：本发明公开了一种变径轮组组件及无级变速器,该变径轮组组件包括：滑块、压紧组件、转动轴以及固设于转动轴上的两个锥形盘,两个锥形盘沿转动轴的轴向方向相对间隔设置,一锥形盘上面朝另一锥形盘的面为锥形面,两个锥形面上均设有多个滑槽,多个滑槽沿锥形盘的周向方向间隔布置,滑槽的导向方向与锥形面的母线相平行,滑块设有多个,多个滑块分别与锥形盘上的滑槽一一对应,滑块介于两个锥形盘之间,且滑块的两端滑动设于对应的滑槽内,滑块能够支撑绕设在其上的传动带,压紧组件能够压紧绕设在滑块上的传动带。如此,在锥形盘的转动过程中,可增大传动带与变径轮组组件之间的摩擦力,避免传动带出现打滑现象,提高动力传递效率。(The invention discloses a reducing wheel set assembly and a continuously variable transmission, wherein the reducing wheel set assembly comprises: the slider, compress tightly the subassembly, the axis of rotation and set firmly two conical disks in the axis of rotation, two conical disks set up along the relative interval of axial direction of axis of rotation, the face of another conical disk is the conical surface on one conical disk, all be equipped with a plurality of spouts on two conical surfaces, the circumferential direction interval arrangement of conical disk is followed to a plurality of spouts, the direction of spout parallels with the generating line of conical surface, the slider is equipped with a plurality ofly, a plurality of sliders respectively with the conical disk on the spout one-to-one, the slider is between two conical disks, and the both ends of slider slide locate in the spout that corresponds, the slider can support around establishing the drive belt on it, it can compress tightly the drive belt around establishing on the slider to compress tightly the subassembly. So, at the rotation in-process of conical disk, can increase the frictional force between drive belt and the reducing wheelset subassembly, avoid the drive belt phenomenon of skidding to appear, improve power transmission efficiency.)

1. A reducing wheelset assembly, comprising: the sliding block, the compressing component, the rotating shaft and the two conical disks fixedly arranged on the rotating shaft are arranged at intervals along the axial direction of the rotating shaft, the surface of one conical disk facing to the other conical disk is a conical surface, a plurality of sliding grooves are arranged on the two conical surfaces and are arranged at intervals along the circumferential direction of the conical disks, the guide direction of the sliding groove is parallel to the generatrix of the conical surface, a plurality of sliding blocks are arranged, the sliding blocks are respectively in one-to-one correspondence with the sliding grooves on the conical disks, the sliding blocks are arranged between the two conical disks, and the two ends of the sliding block can be slidably arranged in the corresponding sliding grooves, the sliding block can be used for supporting a transmission belt wound on the sliding block, and the pressing component can be used for pressing the transmission belt wound on the sliding block.

2. The assembly of claim 1, wherein the pressing assembly comprises a pressing block and a driving member, the pressing block can slide relative to the sliding block, the pressing block comprises a pressing portion and an abutting portion, the abutting portion is connected with the driving member, the driving member enables the pressing block to have a first state and a second state, the pressing portion can press the transmission belt onto the sliding block when the pressing block is in the first state, and the pressing portion is separated from the transmission belt when the pressing block is in the second state.

3. The assembly of claim 2, wherein the driving member includes an elastic member and two concave-convex discs, the two concave-convex discs are respectively corresponding to the two conical discs one by one, and the two concave-convex discs are both sleeved on the rotating shaft, the concave-convex disc is located at one side of the conical disc corresponding to the concave-convex disc, which is far away from the other conical disc, the conical disc can rotate relative to the concave-convex disc, the concave-convex disc is in a conical structure, the conical disc surface of the concave-convex disc faces the conical disc, the conical disc surface of the concave-convex disc includes a concave area and a convex area arranged along the circumferential direction of the concave-convex disc, the distance between the concave area and the conical disc in the axial direction of the rotating shaft is greater than the distance between the convex area and the conical disc, and the sliding groove penetrates through the conical disc in the axial direction of the rotating shaft, the pressing block is located in the sliding groove, the abutting portion of the pressing block abuts against the conical disc surface of the concave-convex disc, the elastic pieces are arranged in a plurality of numbers and correspond to the pressing blocks one to one, the elastic pieces abut against the sliding blocks and the pressing blocks, so that the pressing blocks can be arranged on the sliding blocks in a sliding mode along the axial direction of the rotating shaft, the stretching direction of the elastic pieces is parallel to the axial direction of the rotating shaft, when the abutting portion abuts against the convex area, the pressing blocks are in the first state, the pressing portion is arranged outside the sliding groove in a protruding mode, the pressing portion presses the driving belt onto the sliding blocks, when the abutting portion abuts against the concave area, the pressing blocks are in the second state, and the pressing portion retracts into the sliding groove.

4. The reducing pulley group assembly according to claim 3, wherein the conical surface of the concavo-convex disk further includes a first transition region and a second transition region, and the first transition region, the recessed region, the second transition region and the convex region are sequentially connected around the circumferential direction of the concavo-convex disk, and both the distance between the first transition region and the conical disk and the distance between the second transition region and the conical disk are gradually decreased from the recessed region to the direction close to the convex region, when the abutting portion abuts against the first transition region, the pressing block is gradually switched from the first state to the second state, and when the abutting portion abuts against the second transition region, the pressing block is gradually switched from the second state to the first state.

5. The assembly of claim 3, wherein a portion of the sliding block for supporting the transmission belt is called a bearing portion, a portion of the sliding block slidably disposed in the sliding groove is called a sliding portion, the bearing portion is connected to the sliding portion, a positioning pillar is disposed on an end surface of the sliding portion facing the concave-convex disc, the elastic member includes a first end and a second end that are oppositely disposed and connected, the first end is abutted to the positioning pillar, and the second end is abutted to the pressing block.

6. The reducing wheel assembly as claimed in claim 5, wherein the pressing block is provided with a pressing block, when the pressing block is slidably disposed on the sliding block, the pressing block is opposite to the positioning pillar, and the second end of the elastic member abuts against the pressing block.

7. The reducing wheel set assembly as claimed in claim 5, wherein the contact surface of the bearing part and the driving belt is provided with convex teeth, and the convex teeth can be meshed with gaps formed between steel sheets in the driving belt;

or the surface of the bearing part, which is attached to the transmission belt, is a smooth contact surface;

and/or, the briquetting still including connect the portion of compressing tightly with the connecting portion between the butt portion, be equipped with the through-hole on the sliding part, the shape and the size of through-hole with the briquetting the shape and the size looks adaptation of connecting portion, the connecting portion of briquetting can pass the through-hole.

8. The reducing wheel assembly as claimed in any one of claims 2 to 7, wherein the end surface of the abutting portion of the pressing block is arc-shaped, the pressing portion of the pressing block is provided with a smooth guiding inclined surface, the guiding inclined surface is inclined with respect to the central axis of the rotating shaft, two ends of the guiding inclined surface in a first direction are respectively a top end and a bottom end, the bottom end is closer to the sliding block with respect to the top end in the first direction, the first direction intersects with the axial direction of the rotating shaft, and the bottom end is closer to the driving member with respect to the top end in the axial direction of the rotating shaft.

9. The variable diameter stepless transmission is characterized by comprising a transmission belt and variable diameter wheel set assemblies according to any one of claims 1 to 8, wherein the variable diameter wheel set assemblies are provided with two variable diameter wheel set assemblies which are respectively called as a first variable diameter wheel set assembly and a second variable diameter wheel set assembly, the first variable diameter wheel set assembly and the second variable diameter wheel set assembly are arranged along the second direction at intervals, the second direction is intersected with the axial direction of the rotating shaft, the transmission belt is arranged along the second direction, the second direction is arranged around the first variable diameter wheel set assembly, the sliding block is arranged on the sliding block, and the second variable diameter wheel set assembly is arranged on the sliding block in a plurality.

10. A variable diameter continuously variable transmission, comprising a transmission belt and a variable diameter pulley block assembly according to any one of claims 3 to 8, the reducing wheel set assembly is provided with two reducing wheel set assemblies which are respectively called a first reducing wheel set assembly and a second reducing wheel set assembly, the first reducing wheel set assembly and the second reducing wheel set assembly are arranged at intervals along a second direction, the second direction is crossed with the axial direction of the rotating shaft, the transmission belt is wound on the plurality of sliding blocks of the first reducing wheel set assembly and the plurality of sliding blocks of the second reducing wheel set assembly along the second direction, the concave area of the concave-convex disc in the first reducing wheel set component is closer to the second reducing wheel set component relative to the convex area, in the second reducing wheel set assembly, the concave area of the concave-convex disc is relatively close to the convex area of the first reducing wheel set assembly.

Technical Field

The invention relates to the technical field of automobile gearboxes, in particular to a reducing wheel set assembly and a continuously variable transmission.

Background

A transmission of an automobile is a power transmission part of the vehicle, and mainly functions to increase an output torque while reducing a rotation speed, so that the vehicle has good dynamic performance. Generally, transmissions can be classified into three broad categories, a stepped transmission, a continuously variable transmission (CVT transmission), and a compound transmission. The CVT transmission can realize continuous change of transmission ratio, so that the transmission system and the engine work condition can reach the best matching state, the fuel economy and the dynamic property of the whole vehicle are effectively improved, and the riding comfort of passengers is improved. Therefore, the CVT gearbox gradually replaces a stepped transmission and becomes an ideal automobile transmission device.

The traditional CVT transmission adopts two conical disks which are arranged oppositely, and the smooth surfaces of the two conical disks clamp the steel belt, and power transmission is carried out by utilizing the friction force between the steel belt and the conical surfaces, however, the mode easily causes the CVT transmission to have small load and easy slipping, so that the power transmission effect is influenced.

Disclosure of Invention

Therefore, it is necessary to provide a reducing wheel set assembly for solving the above problems, which can effectively prevent the transmission belt from slipping and improve the power transmission efficiency of the reducing wheel set assembly.

A reducing wheel assembly comprising: the sliding block, the compressing component, the rotating shaft and the two conical disks fixedly arranged on the rotating shaft are arranged at intervals along the axial direction of the rotating shaft, the surface of one conical disk facing to the other conical disk is a conical surface, a plurality of sliding grooves are arranged on the two conical surfaces and are arranged at intervals along the circumferential direction of the conical disks, the guide direction of the sliding groove is parallel to the generatrix of the conical surface, a plurality of sliding blocks are arranged, the sliding blocks are respectively in one-to-one correspondence with the sliding grooves on the conical disks, the sliding blocks are arranged between the two conical disks, and the two ends of the sliding block can be slidably arranged in the corresponding sliding grooves, the sliding block can be used for supporting a transmission belt wound on the sliding block, and the pressing component can be used for pressing the transmission belt wound on the sliding block.

The reducing wheel set assembly comprises a sliding block, a pressing assembly, a rotating shaft and two conical disks fixedly arranged on the rotating shaft, wherein the conical surfaces of the two conical disks are arranged at intervals relatively along the axial direction of the rotating shaft. Because all be equipped with a plurality of spouts on two conical surfaces, and a plurality of spouts are arranged along the circumference direction interval of conical disk, and the direction of spout parallels with the generating line of conical surface, so, a plurality of sliders of setting between two conical disks can be located in the spout with a plurality of spout one-to-one and slip respectively. When the two conical disks are gradually close to each other, the sliding blocks can move in the direction away from the rotating shaft along the sliding grooves, and the radius of a circle formed by the sliding blocks is gradually increased; when two conical disks are kept away from each other gradually, the slider can move to being close to the direction of the rotating shaft along the sliding groove, and the radius of a circle enclosed by the plurality of sliders is gradually reduced, so that the circumference of a transmission belt wound on the slider arranged in the reducing wheel set assembly can be changed. Because axis of rotation and conical disk are at the rotation in-process, the slider can support the drive belt, consequently, can increase the drive belt and the reducing wheelset subassembly between the frictional force, improved the power transmission efficiency of reducing wheelset subassembly in the transmission. In addition, because compress tightly the subassembly and can be used for compressing tightly around establishing the drive belt on the slider, so, can further increase the drive belt and rotate the frictional force between in-process and the slider, avoid the drive belt phenomenon of skidding to appear in the operation process to improve power transmission efficiency.

The technical solution is further explained below:

in one embodiment, the pressing assembly includes a pressing block and a driving element, the pressing block can slide relative to the sliding block, the pressing block includes a pressing portion and an abutting portion connected to each other, the abutting portion is connected to the driving element, the driving element enables the pressing block to have a first state and a second state, when the pressing block is in the first state, the pressing portion can press the transmission belt onto the sliding block, and when the pressing block is in the second state, the pressing portion is separated from the transmission belt.

In one embodiment, the driving member includes an elastic member and two concave-convex discs, the two concave-convex discs are respectively corresponding to the two conical discs one by one, and the two concave-convex discs are sleeved on the rotating shaft, the concave-convex disc is located on one side of the conical disc corresponding to the concave-convex disc, which is far away from the other conical disc, the conical disc can rotate relative to the concave-convex disc, the concave-convex disc is in a conical structure, the conical disc surface of the concave-convex disc faces the conical disc, the conical disc surface of the concave-convex disc includes a concave area and a convex area arranged along the circumferential direction of the concave-convex disc, the distance between the concave area and the conical disc is greater than the distance between the convex area and the conical disc in the axial direction of the rotating shaft, the sliding chute penetrates through the conical discs in the axial direction of the rotating shaft, and the pressing block is located in the sliding chute, and the abutting part of the pressing block abuts against the conical disc surface of the concave-convex disc, the elastic pieces are provided with a plurality of elastic pieces which are respectively in one-to-one correspondence with the pressing blocks, the elastic pieces abut against the sliding blocks and the pressing blocks, so that the pressing blocks can be arranged on the sliding blocks in a sliding manner along the axial direction of the rotating shaft, the telescopic direction of the elastic pieces is parallel to the axial direction of the rotating shaft, when the abutting part abuts against the convex area, the pressing blocks are in the first state, the pressing part is arranged outside the sliding groove in a protruding manner, the pressing part presses the transmission belt onto the sliding blocks, when the abutting part abuts against the concave area, the pressing blocks are in the second state, and the pressing part retracts into the sliding groove.

In one embodiment, the conical surface of the concavo-convex disk further includes a first transition region and a second transition region, and the first transition region, the concave region, the second transition region and the convex region are sequentially connected and disposed around the circumferential direction of the concavo-convex disk, the distance between the first transition region and the conical disk and the distance between the second transition region and the conical disk are both gradually reduced from the concave region to the direction close to the convex region, when the abutting portion abuts against the first transition region, the pressing block is gradually switched from the first state to the second state, and when the abutting portion abuts against the second transition region, the pressing block is gradually switched from the second state to the first state. In one embodiment, a portion of the slider for supporting the transmission belt is referred to as a bearing portion, a portion of the slider slidably disposed in the sliding groove is referred to as a sliding portion, the bearing portion is connected to the sliding portion, a positioning pillar is disposed on an end surface of the sliding portion facing the concave-convex disk, the elastic member includes a first end and a second end that are oppositely disposed and connected, the first end is abutted to the positioning pillar, and the second end is abutted to the pressing block.

In one embodiment, the pressing block is provided with a pressing block, when the pressing block is slidably disposed on the sliding block, the pressing block is opposite to the positioning pillar, and the second end of the elastic member abuts against the pressing block.

In one embodiment, convex teeth are arranged on the contact surface of the bearing part, which is attached to the transmission belt, and the convex teeth can be meshed with gaps formed among steel sheets in the transmission belt; or the surface of the bearing part, which is attached to the transmission belt, is a smooth contact surface; and/or, the briquetting still including connect the portion of compressing tightly with the connecting portion between the butt portion, be equipped with the through-hole on the sliding part, the shape and the size of through-hole with the briquetting the shape and the size looks adaptation of connecting portion, the connecting portion of briquetting can pass the through-hole.

In one embodiment, an end surface of the abutting portion of the pressing block is arc-shaped, a smooth guiding inclined surface is arranged on the pressing portion of the pressing block, the guiding inclined surface is inclined relative to a central axis of the rotating shaft, two end portions of the guiding inclined surface are respectively a top end and a bottom end along a first direction, the bottom end is closer to the sliding block relative to the top end along the first direction, the first direction is intersected with an axial direction of the rotating shaft, and the bottom end is closer to the driving member relative to the top end along the axial direction of the rotating shaft.

The application still provides a variable diameter buncher, including the drive belt and as above variable diameter wheelset subassembly, variable diameter wheelset subassembly be equipped with two and be called first variable diameter wheelset subassembly and second variable diameter wheelset subassembly respectively, first variable diameter wheelset subassembly with second variable diameter wheelset subassembly sets up along the relative interval in second direction, the second direction with the axial direction of axis of rotation is crossing, the drive belt is followed the second direction is around establishing a plurality of first variable diameter wheelset subassembly the slider and a plurality of second variable diameter wheelset subassembly on the slider.

The application also provides a variable-diameter stepless transmission, which comprises a transmission belt and the variable-diameter wheel set assembly, the reducing wheel set assembly is provided with two reducing wheel set assemblies which are respectively called a first reducing wheel set assembly and a second reducing wheel set assembly, the first reducing wheel set assembly and the second reducing wheel set assembly are arranged at intervals along a second direction, the second direction is crossed with the axial direction of the rotating shaft, the transmission belt is wound on the plurality of sliding blocks of the first reducing wheel set assembly and the plurality of sliding blocks of the second reducing wheel set assembly along the second direction, the concave area of the concave-convex disc in the first reducing wheel set component is closer to the second reducing wheel set component relative to the convex area, in the second reducing wheel set assembly, the concave area of the concave-convex disc is relatively close to the convex area of the first reducing wheel set assembly.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Furthermore, the drawings are not to scale of 1:1, and the relative dimensions of the various elements in the drawings are drawn only by way of example and not necessarily to true scale. In the drawings:

FIG. 1 is a schematic structural diagram of a reducing wheel assembly according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a reducing wheel assembly in another state according to an embodiment of the present invention;

FIG. 3 is an exploded view of a portion of the construction of the variable diameter wheelset assembly of FIG. 1;

FIG. 4 is an exploded view of another perspective view of the variable diameter wheelset assembly of FIG. 1;

FIG. 5 is a schematic structural diagram of a concave-convex disc in the reducing wheel assembly according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a sliding block and a pressing block in the reducing wheel assembly according to an embodiment of the present disclosure;

FIG. 7 is an exploded view of a portion of the structure of the set of sliders and compacts shown in FIG. 6;

fig. 8 is a schematic structural diagram of a variable diameter continuously variable transmission according to an embodiment of the present invention.

The elements in the figure are labeled as follows:

1. a variable diameter continuously variable transmission; 10. a variable diameter wheel assembly; 110. a slider; 111. a load bearing part; 112. a sliding part; 1121. a through hole; 113. positioning the strut; 120. a compression assembly; 121. briquetting; 1211. a pressing part; 12111. a guide slope; 1212. an abutting portion; 1213. a pressing block; 1214. a connecting portion; 122. a drive member; 1221. an elastic member; 1222. a concave-convex disc; 12221. a recessed region; 12222. a raised region; 12223. a first transition zone; 12224. a second transition zone; 130. a rotating shaft; 140. a conical disk; 141. a conical surface; 142. a chute; 20. a transmission belt.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 to 4 and 8, an embodiment of the present invention provides a reducing wheel assembly 10, including: a slider 110, a pressing assembly 120, a rotating shaft 130, and two conical disks 140 fixed on the rotating shaft 130. The two conical disks 140 are disposed at intervals in opposition in the axial direction of the rotating shaft 130. The face of one conical disk 140 facing the other conical disk 140 is a conical face 141. A plurality of sliding grooves 142 are formed on each of the two tapered surfaces 141. The plurality of chutes 142 are arranged at intervals in the circumferential direction of the conical disk 140. The guide direction of the slide groove 142 is parallel to the generatrix of the tapered surface 141. The plurality of sliders 110 are provided, and the plurality of sliders 110 respectively correspond to the sliding grooves 142 on the conical disk 140 one by one. The slider 110 is disposed between the two conical disks 140, and two ends of the slider 110 can be slidably disposed in the corresponding sliding slots 142. The shoe 110 can be used to support the belt 20 about which it is wound. The clamping assembly 120 can be used to clamp the belt 20 around the shoe 110.

The reducing wheel assembly 10 includes a sliding block 110, a pressing assembly 120, a rotating shaft 130, and two conical disks 140 fixed on the rotating shaft 130, wherein the conical surfaces 141 of the two conical disks 140 are oppositely spaced along the axial direction of the rotating shaft 130. Because a plurality of chutes 142 are respectively arranged on the two conical surfaces 141, and the chutes 142 are arranged at intervals along the circumferential direction of the conical disks 140, the guiding direction of the chutes 142 is parallel to the generatrix of the conical surfaces 141, so that the plurality of sliders 110 arranged between the two conical disks 140 can be respectively in one-to-one correspondence with the chutes 142 and slidably arranged in the chutes 142. When the two conical disks 140 gradually approach each other, the sliders 110 can move along the sliding grooves 142 in a direction away from the rotating shaft 130 and the radius of a circle formed by the plurality of sliders 110 gradually increases; when the two conical disks 140 are gradually separated from each other, the sliding blocks 110 can move along the sliding grooves 142 toward the rotating shaft 130, and the radius of the circle formed by the plurality of sliding blocks 110 is gradually reduced, so that the circumference of the transmission belt 20 wound around the sliding blocks 110 disposed in the variable diameter pulley block assembly 10 can be changed. Because the slide block 110 can support the transmission belt 20 during the rotation of the rotating shaft 130 and the conical disc 140, the friction between the transmission belt 20 and the variable diameter pulley block assembly 10 during the transmission process can be increased, and the power transmission efficiency of the variable diameter pulley block assembly 10 is improved. In addition, since the pressing component 120 can be used for pressing the transmission belt 20 wound on the sliding block 110, the friction force between the transmission belt 20 and the sliding block 110 during the rotation process can be further increased, and the phenomenon that the transmission belt 20 slips during the operation process is avoided, so as to improve the power transmission efficiency.

Referring to fig. 3, 4 and 6 to 8, in an embodiment based on the above embodiments, the pressing assembly 120 includes a pressing block 121 and a driving member 122. The pressing piece 121 can slide relative to the slider 110. The pressing block 121 includes a pressing portion 1211 and an abutting portion 1212 connected to each other. The abutment 1212 is connected to the driver 122. The driving member 122 causes the pressing piece 121 to have a first state and a second state. The pressing portion 1211 can press the belt 20 against the slider 110 when the pressing member 121 is in the first state, and the pressing portion 1211 is separated from the belt 20 when the pressing member 121 is in the second state. Therefore, the pressing blocks 121 can be in different states according to actual requirements, the pressing force of the transmission belt 20 on the sliding blocks 110 is improved while the transmission process of the transmission belt 20 is not influenced, the transmission belt 20 is stably pressed on the sliding blocks 110, the friction force between the transmission belt 20 and the reducing wheel set assembly 10 in the transmission process is improved, and the transmission efficiency of the transmission belt 20 is improved.

Specifically, in the present embodiment, the pressing piece 121 is movable on the slider 110 in the axial direction of the rotating shaft 130 with respect to the slider 110. The transmission belt 20 is wound on the slider 110 and is located between the pressing blocks 121 on the two conical disks 140 which are oppositely arranged. When it is necessary to press the belt 20 with the pressing block 121, the pressing block 121 is moved in the axial direction of the rotating shaft 130 so that the pressing block 121 is moved toward the direction close to the belt 20. When it is necessary to separate the pressing piece 121 from the belt 20, the pressing piece 121 is moved in the axial direction of the rotating shaft 130 so that the pressing piece 121 is moved in a direction away from the belt 20.

Alternatively, on the basis of the above embodiment, in another embodiment, the pressing block 121 can slide in the second direction relative to the slider 110. The second direction intersects with the axial direction of the rotating shaft 130. When it is necessary to press the belt 20 with the pressing block 121, the pressing block 121 is moved in the second direction so that the pressing block 121 is moved toward a direction close to the belt 20. When it is desired to separate the pressing piece 121 from the belt 20, the pressing piece 121 is moved in the second direction so that the pressing piece 121 is moved in a direction away from the belt 20.

Alternatively, in another embodiment, the compressing assembly 120 may include a gripper and a tensioning member connected to each other, the tensioning member is disposed on the rotating shaft 130, and the tensioning member may control the gripper to extend and retract along a radial direction of the rotating shaft 130, so that the gripper has a third state and a fourth state. When the gripper is in the third state, the gripper extends and engages the belt 20 to tension the belt 20 against the shoe 110. When the gripper is in the fourth state, the gripper is retracted and separated from the drive belt 20.

Referring to fig. 3 to fig. 5, in an embodiment based on the above embodiments, the driving member 122 includes an elastic member 1221 and a concave-convex disc 1222. The concave-convex disks 1222 are provided with two concave-convex disks 1222 corresponding to the two conical disks 140 one by one, and the two concave-convex disks 1222 are sleeved on the rotating shaft 130. The concave-convex disk 1222 is located at a side of its corresponding conical disk 140 remote from the other conical disk 140, and the conical disk 140 is rotatable with respect to the concave-convex disk 1222. Thus, when the conical disk 140 rotates with the rotating shaft 130 about the center axis of the rotating shaft 130, the concave-convex disk 1222 is not affected by the rotating shaft 130 and thus can be kept stationary.

Further, with continued reference to fig. 3-5, in the present embodiment, the concave-convex disk 1222 is a tapered structure, and the tapered surface of the concave-convex disk 1222 faces the tapered disk 140. As shown in fig. 5, the tapered disk surface of the concave-convex disk 1222 includes a recessed area 12221 and a raised area 12222 arranged in the circumferential direction of the concave-convex disk 1222. The spacing between the recessed area 12221 and the conical disk 140 in the axial direction of the rotating shaft 130 is larger than the spacing between the raised area 12222 and the conical disk 140.

Further, as shown in fig. 1, 3, 6, and 7, in the present embodiment, the slide groove 142 penetrates the conical disk 140 in the axial direction of the rotating shaft 130, the pressing piece 121 is located inside the slide groove 142, and the abutting portion 1212 of the pressing piece 121 abuts on the conical disk surface of the concave-convex disk 1222. The elastic members 1221 are provided in plural, and the plural elastic members 1221 correspond to the plural pressing blocks 121 one to one, respectively. The elastic member 1221 abuts between the slider 110 and the pressing piece 121 so that the pressing piece 121 can be slidably provided on the slider 110 in the axial direction of the rotating shaft 130. The expansion and contraction direction of the elastic member 1221 is parallel to the axial direction of the rotating shaft 130. In this way, when the abutting portion 1212 abuts against the protruding area 12222, the pressing piece 121 is in the first state, and at this time, the pressing portion 1211 protrudes out of the sliding slot 142, and the pressing portion 1211 presses the transmission belt 20 against the slider 110. When the abutting portion 1212 abuts against the recessed area 12221, at this time, the pressing block 121 is in the second state, and the pressing portion 1211 retracts into the sliding groove 142.

Optionally, in another embodiment, the driving member 122 comprises an electric telescopic rod. When the pressing block 121 is arranged in the sliding groove 142, one end of the electric telescopic rod is connected with the pressing block 121, and the other end of the electric telescopic rod is arranged in the sliding groove 142 in a sliding mode. When the telescopic direction of the electric telescopic rod is parallel to the axial direction of the rotating shaft 130, the pressing block 121 can move back and forth on the sliding block 110 along the axial direction of the rotating shaft 130. When the telescopic direction of the electric telescopic rod intersects with the axial direction of the rotating shaft 130, the pressing block 121 can approach or depart from the sliding block 110 along the telescopic direction of the electric telescopic rod.

Referring to fig. 3 and 5, in addition to the above embodiments, in an embodiment, the tapered surface of the concave-convex disk 1222 further includes a first transition area 12223 and a second transition area 12224. And the first transition area 12223, the recessed area 12221, the second transition area 12224, and the raised area 12222 are sequentially arranged in series around the circumferential direction of the concave-convex disk 1222. The spacing of the first transition area 12223 from the conical disk 140 and the spacing of the second transition area 12224 from the conical disk 140 each decrease from the recessed area 12221 toward the raised area 12222. In other words, the surface of the first transition area 12223 and the surface of the second transition area 12224 are both inclined surfaces. In this way, the abutting portion 1212 of the pressing piece 121 abutting on the conical surface of the concave-convex disk 1222 can smoothly transition from the convex area 12222 to the concave area 12221, and avoid the phenomenon of jamming in the transition from the concave area 12221 to the convex area 12222.

Specifically, in the present embodiment, when the abutting portion 1212 abuts on the first transition area 12223, the pressing piece 121 is gradually switching from the first state to the second state. When the abutting portion 1212 abuts on the second transition area 12224, the pressure piece 121 is gradually switched from the second state to the first state.

Referring to fig. 6 to 8, in order to avoid the elastic member 1221 from deflecting during the expansion and contraction process, in an embodiment based on the above embodiments, a portion of the slider 110 for supporting the transmission belt 20 is referred to as a load bearing portion 111. The portion of the slider 110 slidably disposed in the slide groove 142 is referred to as a slide portion 112. The bearing portion 111 is connected to the sliding portion 112. The end surface of the sliding portion 112 facing the concave-convex disk 1222 is provided with a positioning support 113. The elastic member 1221 includes a first end and a second end opposite to each other and connected to each other. The first end is abutted against the positioning support 113, and the second end is abutted against the pressing block 121.

Specifically, in the present embodiment, the elastic member 1221 is a compression spring. One end of the compression spring is sleeved outside the positioning support 113, and the other end of the compression spring abuts against the pressing block 121. Therefore, under the action of the positioning support column 113, the phenomenon that the compression spring shakes in the compression process can be avoided, and the stability of the compression spring in the compression process is improved.

Referring to fig. 6 and 7, in order to facilitate the elastic member 1221 to abut against the pressing block 121, a pressing block 1213 is disposed on the pressing block 121. Specifically, when the pressing block 121 is slidably disposed on the sliding block 110, the pressing block 1213 is opposite to the positioning pillar 113, and the second end of the elastic member 1221 abuts against the pressing block 1213.

Optionally, the elastic member 1221 may be fixedly connected to the positioning pillar 113 and the pressing block 1213, so as to prevent the elastic member 1221 from falling off during the expansion process and affecting the working effect of the pressing block 121. Alternatively, the elastic member 1221 may be detachably connected to the positioning support 113 and the pressing block 1213, so that it is convenient for a worker to replace the sliding block 110, the pressing block 121, and the elastic member 1221 when any one of them is damaged.

In the continuously variable transmission, the transmission belt 20 is generally formed by a plurality of steel plates arranged in sequence and connected to form a closed-loop belt body, and therefore, a fine gap is formed between the steel plates. In order to further increase the friction between the belt 20 and the shoe 110, in an embodiment, in addition to the above embodiments, a contact surface of the bearing part 111 and the belt 20 is provided with a convex tooth (not shown). The teeth are capable of engaging the gaps formed between the steel plates in the belt 20.

Alternatively, in another embodiment, the surface of the bearing portion 111 that contacts the belt 20 is a smooth contact surface.

It should be noted that the "smooth contact surface" referred to in the embodiments does not mean an absolutely smooth contact surface in an ideal state.

Alternatively, in order to increase the frictional force between the bearing portion 111 of the shoe 110 and the belt 20, the surface of the bearing portion 111 that contacts the belt 20 is a contact surface having a large roughness. Thus, the frictional force between the bearing portion 111 and the transmission belt 20 can be effectively increased.

With reference to fig. 1, fig. 6 and fig. 7, in addition to the above embodiments, in an embodiment, the pressing block 121 further includes a connecting portion 1214 connected between the pressing portion 1211 and the abutting portion 1212. In order to enable the pressing block 121 to move along with the slider 110 in the guiding direction of the sliding slot 142, the sliding portion 112 is provided with a through hole 1121. The shape and size of the through hole 1121 are adapted to the shape and size of the connecting portion 1214 of the pressing block 121. The connecting portion 1214 of the pressing piece 121 can pass through the through hole 1121. In this way, the pressing block 121 can slide along with the sliding block 110 along the guiding direction of the sliding slot 142, and the pressing block 121 can also slide on the sliding block 110 in the through hole 1121 along the axial direction of the rotating shaft 130.

It should be noted that "the shape and size of the through hole 1121 are matched with the shape and size of the connecting portion 1214 of the pressing piece 121" means that the shape of the through hole 1121 formed in the sliding portion 112 is the same as the shape of the connecting portion 1214 of the pressing piece 121, and the size of the through hole 1121 is slightly larger than the size of the connecting portion 1214 of the pressing piece 121. Thus, the connecting portion 1214 can pass through the through hole 1121, and the connecting portion 1214 can drive the entire pressing block 121 to move in the through hole 1121. For example, in the present embodiment, the through hole 1121 has a rectangular structure, and the connecting portion 1214 of the pressing block 121 has a cubic column structure.

In this embodiment, as shown in fig. 7, when the through hole 1121 has a rectangular structure, the size of the through hole 1121 refers to the length of each side of the rectangular structure, and each side can be divided into two types, namely, the width W of the through hole 1121_hAnd height H_hAnd the dimension of the connecting portion 1214 refers to the width W of the cubic column_cAnd thickness H_c. At this time, W_hIs preferably slightly larger than W_c，H_hIs preferably slightly larger than H_c。

In addition to the above embodiments, in an embodiment, an end surface of the abutting portion 1212 of the compact 121 has an arc surface shape. As such, the smoothness of the abutment 1212 sliding over the recessed area 12221, the raised area 12222, the first transition area 12223, and the second transition area 12224 may be improved.

Further, referring to fig. 3, 4 and 7, in the present embodiment, the pressing portion 1211 of the pressing block 121 is provided with a smooth guiding inclined surface 12111. The guide slope 12111 is disposed obliquely to the central axis of the rotating shaft 130. Both end portions of the first direction-guiding inclined surface 12111 are a top end and a bottom end, respectively, and the bottom end is closer to the slider 110 than the top end in the first direction. The first direction intersects with the axial direction of the rotating shaft 130. The bottom end is closer to the driver 122 than the top end in the axial direction of the rotating shaft 130. Thus, when the pressing portion 1211 of the pressing piece 121 extends out of the sliding groove 142, the guide slope 12111 can be pressed against the belt 20.

For the convenience of clearly understanding the arrangement direction of the first direction in the present embodiment, taking fig. 7 as an example, the first direction is S in fig. 7₁The direction indicated.

Further, the angle between the guide slope 12111 and the central axis of the rotation shaft 130 is 65 ° to 75 °.

Specifically, in the present embodiment, the angle between the guide slope 12111 and the central axis of the rotating shaft 130 is 70 °.

Referring to fig. 8, the present application further provides a variable diameter continuously variable transmission 1, which includes a transmission belt 20 and the variable diameter pulley block assembly 10 as described above. The reducing wheel set assembly 10 is provided with two and is respectively called a first reducing wheel set assembly 10 and a second reducing wheel set assembly 10. The first reducing wheel set assembly and the second reducing wheel set assembly 10 are arranged at intervals along the second direction. The second direction intersects with the axial direction of the rotating shaft 130. The belt 20 is wound around the plurality of blocks 110 of the first reducing pulley block assembly 10 and the plurality of blocks 110 of the second reducing pulley block assembly 10 in the second direction.

The variable diameter continuously variable transmission 1 comprises the transmission belt 20 and two variable diameter wheel set assemblies 10, and the first variable diameter wheel set assembly and the second variable diameter wheel set assembly 10 are arranged at intervals along the second direction, and the transmission belt 20 is wound on the plurality of sliding blocks 110 of the first variable diameter wheel set assembly 10 and the plurality of sliding blocks 110 of the second variable diameter wheel set assembly 10 along the second direction. When the two conical disks 140 in the first reducing pulley block assembly 10 gradually approach each other and the two conical disks 140 in the second reducing pulley block assembly 10 gradually move away from each other, the circumference of the transmission belt 20 wound around the slider 110 of the first reducing pulley block assembly 10 increases and the circumference of the transmission belt 20 wound around the slider 110 of the second reducing pulley block assembly 10 decreases; when the two conical disks 140 of the first reducing pulley block assembly 10 are gradually separated from each other and the two conical disks 140 of the second reducing pulley block assembly 10 are gradually adjacent to each other, the circumference of the belt 20 wound around the blocks 110 of the first reducing pulley block assembly 10 is reduced and the circumference of the belt 20 wound around the blocks 110 of the second reducing pulley block assembly 10 is increased. In this way, stepless speed change can be achieved while increasing the friction between the drive belt 20 and the driving and driven wheel sets. In addition, since the pressing component 120 can be used for pressing the transmission belt 20 wound on the sliding block 110, the friction force between the transmission belt 20 and the sliding block 110 during the rotation process can be increased, and the phenomenon that the transmission belt 20 slips during the operation process is avoided, so as to improve the power transmission efficiency of the continuously variable transmission.

For the convenience of clear understanding of the arrangement direction of the second direction in the present embodiment, taking fig. 8 as an example, the second direction is S in fig. 8₂The direction indicated.

In order to press the belt 20 in contact with the shoe 110 against the shoe 110 without affecting the drive of the portion of the belt 20 that is separate from the shoe 110. The application also provides a variable diameter continuously variable transmission 1, which comprises a transmission belt 20 and the variable diameter wheel set assembly 10. The reducing wheel set assembly 10 is provided with two and is respectively called a first reducing wheel set assembly 10 and a second reducing wheel set assembly 10. The first reducing wheel set assembly and the second reducing wheel set assembly 10 are arranged at intervals along the second direction. The second direction intersects with the axial direction of the rotating shaft 130. The transmission belt 20 is wound around the plurality of sliding blocks 110 of the first variable diameter pulley block assembly 10 and the plurality of sliding blocks 110 of the second variable diameter pulley block assembly 10 along the second direction. The recessed area 12221 of the concave-convex disk 1222 in the first reducing wheel set assembly 10 is closer to the second reducing wheel set assembly 10 than the raised area 12222. The recessed area 12221 of the concave-convex disk 1222 in the second reducing wheel set assembly 10 is closer to the first reducing wheel set assembly 10 than the raised area 12222.

When the belt 20 is wound around the blocks 110 of the first reducing pulley block assembly 10 and the blocks 110 of the second reducing pulley block assembly 10, since the number of the blocks 110 covered by the belt 20 is greater than the number of the blocks 110 not covered, correspondingly, on the basis of the above embodiment, in an embodiment, the area of the recessed area 12221 is smaller than that of the protruding area 12222 on the tapered disk surface of the concave-convex disk 1222. In this way, the pressing piece 121 on the sliding block 110 covered with the transmission belt 20 can be extended out of the sliding groove 142 and pressed against the transmission belt 20.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.