Variable-diameter wheel set assembly and continuously variable transmission

Abstract

The application discloses a variable-diameter wheel set assembly and a continuously variable transmission, and relates to the technical field of continuously variable transmissions. The variable-diameter wheel set assembly comprises a sliding block, a pressing assembly, a rotating shaft and two conical discs fixed on the rotating shaft, the two conical discs are oppositely and separately arranged along the axial direction of the rotating shaft, the surface of one conical disc facing the other conical disc is a conical surface, a plurality of sliding grooves are arranged on the two conical surfaces and along the circumferential direction of the conical disc, the guide direction of the sliding grooves is parallel to the generatrix of the conical surface, a plurality of sliding blocks are arranged, the plurality of sliding blocks are one-to-one corresponding to the sliding grooves on the conical disc, the sliding blocks are arranged between the two conical discs, the two ends of the sliding blocks are slidably arranged in the corresponding sliding grooves, the sliding blocks can support a transmission belt arranged thereon, and the pressing assembly can press the transmission belt arranged on the sliding blocks. In this way, the friction between the transmission belt and the variable-diameter wheel set assembly can be increased during the rotation of the conical disc, the slipping phenomenon of the transmission belt can be avoided, and the power transmission efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive transmission technology, and in particular to a variable diameter wheel assembly and a continuously variable transmission. Background Technology

[0002] The transmission in a car is the power transmission component, its main function being to increase output torque while reducing engine speed, thus providing the vehicle with good power performance. Generally, transmissions can be divided into three main categories: stepped transmissions, continuously variable transmissions (CVTs), and hybrid transmissions. Among them, CVTs, because they can continuously change the gear ratio, allow the transmission system to achieve optimal matching with engine operating conditions, thereby effectively improving the vehicle's fuel economy and power, and enhancing passenger comfort. Therefore, CVTs have gradually replaced stepped transmissions, becoming the ideal automotive transmission device.

[0003] Traditional CVT transmissions use two opposing conical discs with smooth surfaces to hold a steel belt, transmitting power through the friction between the steel belt and the conical surfaces. However, this method can easily lead to low load capacity and slippage in the CVT transmission, thus affecting the power transmission performance. Summary of the Invention

[0004] Therefore, it is necessary to provide a variable diameter pulley assembly to address the above problems. This variable diameter pulley assembly can effectively prevent belt slippage and improve the power transmission efficiency of the variable diameter pulley assembly.

[0005] A variable diameter wheel assembly includes: a slider, a clamping assembly, a rotating shaft, and two conical discs fixed on the rotating shaft. The two conical discs are spaced apart relative to each other along the axial direction of the rotating shaft. The surface of one conical disc facing the other conical disc is a conical surface. Multiple grooves are provided on both conical surfaces. The multiple grooves are spaced apart along the circumferential direction of the conical discs. The guiding direction of the grooves is parallel to the generatrix of the conical surface. Multiple sliders are provided, and each slider corresponds to one of the grooves on the conical disc. The slider is located between the two conical discs, and both ends of the slider can slide within the corresponding grooves. The slider can be used to support a drive belt wound on it. The clamping assembly can be used to clamp the drive belt wound on the slider.

[0006] The aforementioned variable diameter wheel assembly includes a slider, a clamping assembly, a rotating shaft, and two conical discs fixed on the rotating shaft. The conical surfaces of the two discs are spaced apart relative to each other along the axial direction of the rotating shaft. Multiple grooves are provided on each of the two conical surfaces, and these grooves are spaced apart along the circumferential direction of the discs. The guiding direction of the grooves is parallel to the generatrix of the conical surfaces. Thus, multiple sliders positioned between the two discs can each correspond to and slide within a groove. When the two discs gradually approach each other, the sliders can move along the grooves away from the rotating shaft, and the radius of the circle formed by the sliders gradually increases. When the two discs gradually move away from each other, the sliders can move along the grooves towards the rotating shaft, and the radius of the circle formed by the sliders gradually decreases. This allows the circumference of the transmission belt wound around the sliders in the variable diameter wheel assembly to be changed. Because the slider supports the transmission belt during rotation of the rotating shaft and conical disc, the friction between the transmission belt and the variable diameter pulley assembly is increased, thus improving the power transmission efficiency of the variable diameter pulley assembly. Furthermore, since the clamping assembly can be used to clamp the transmission belt wound on the slider, the friction between the transmission belt and the slider during rotation is further increased, preventing slippage of the transmission belt during operation and improving power transmission efficiency.

[0007] The technical solution will be further explained below:

[0008] In one embodiment, the clamping assembly includes a clamping block and a driving member. The clamping block is slidable relative to the slider. The clamping block includes a clamping portion and an abutting portion connected together. The abutting portion is connected to the driving member. The driving member causes the clamping block to have a first state and a second state. When the clamping block is in the first state, the clamping portion can press the transmission belt onto the slider. When the clamping block is in the second state, the clamping portion is separated from the transmission belt.

[0009] In one embodiment, the driving component includes an elastic element and two concave-convex discs. Each concave-convex disc corresponds to one of the two conical discs, and both concave-convex discs are sleeved on the rotating shaft. Each concave-convex disc is located on the side of its corresponding conical disc away from the other conical disc, and the conical disc is rotatable relative to the concave-convex disc. The concave-convex disc has a conical structure, with its conical surface facing the conical disc. The conical surface of the concave-convex disc includes a recessed area and a raised area arranged along the circumferential direction of the concave-convex disc. The distance between the recessed area and the conical disc in the axial direction of the rotating shaft is greater than the distance between the raised area and the conical disc. A groove penetrates the conical disc along the axial direction of the rotating shaft. The disc has a pressure block located within the groove, with the abutting portion of the pressure block abutting against the conical surface of the concave-convex disc. Multiple elastic elements are provided, each corresponding to one of the pressure blocks. The elastic elements abut against the slider and the pressure block, allowing the pressure block to slide along the axial direction of the rotation shaft on the slider. The extension and retraction direction of the elastic elements is parallel to the axial direction of the rotation shaft. When the abutting portion abuts against the protruding area, the pressure block is in the first state, with the pressing portion protruding outside the groove and pressing the transmission belt against the slider. When the abutting portion abuts against the recessed area, the pressure block is in the second state, with the pressing portion retracting into the groove.

[0010] In one embodiment, the conical surface of the convex-concave disc further includes a first transition region and a second transition region. The first transition region, the recessed region, the second transition region, and the raised region are sequentially connected around the circumferential direction of the convex-concave disc. The distance between the first transition region and the conical disc, and the distance between the second transition region and the conical disc, gradually decrease from the recessed region towards the raised region. When the abutting part abuts against the first transition region, the pressure block gradually switches from the first state to the second state. When the abutting part abuts against the second transition region, the pressure block gradually switches from the second state to the first state. In one embodiment, the portion of the slider used to support the transmission belt is called the load-bearing portion, and the portion of the slider slidably disposed in the groove is called the sliding portion. The load-bearing portion is connected to the sliding portion. A positioning support is provided on the end face of the sliding portion facing the convex-concave disc. The elastic element includes a first end and a second end that are oppositely disposed and connected. The first end abuts against the positioning support, and the second end abuts against the pressure block.

[0011] In one embodiment, the pressure block is provided with a pressing block. When the pressure block is slidably disposed on the slider, the pressing block is opposite to the positioning support, and the second end of the elastic member abuts against the pressing block.

[0012] In one embodiment, the contact surface of the load-bearing part that is in contact with the transmission belt is provided with protruding teeth, which can engage with the gaps formed between the steel sheets in the transmission belt; or, the contact surface of the load-bearing part that is in contact with the transmission belt is a smooth contact surface; and / or, the pressure block further includes a connecting part connecting the pressing part and the abutting part, the sliding part is provided with a through hole, the shape and size of the through hole are adapted to the shape and size of the connecting part of the pressure block, and the connecting part of the pressure block can pass through the through hole.

[0013] In one embodiment, the end face of the abutting portion of the pressure block is arc-shaped, and the pressing portion of the pressure block is provided with a smooth guide slope. The guide slope is inclined relative to the central axis of the rotating shaft. The two ends of the guide slope along the first direction are the top end and the bottom end, respectively. Along the first direction, the bottom end is closer to the slider than the top end. The first direction intersects the axial direction of the rotating shaft, and along the axial direction of the rotating shaft, the bottom end is closer to the driving member than the top end.

[0014] This application also provides a variable diameter continuously variable transmission, including a drive belt and a variable diameter pulley assembly as described above. The variable diameter pulley assembly has two components, referred to as a first variable diameter pulley assembly and a second variable diameter pulley assembly, which are arranged at intervals relative to each other along a second direction. The second direction intersects the axial direction of the rotating shaft. The drive belt is wound along the second direction around a plurality of sliders of the first variable diameter pulley assembly and a plurality of sliders of the second variable diameter pulley assembly.

[0015] This application also provides a variable diameter continuously variable transmission (CVT), including a drive belt and a variable diameter pulley assembly as described above. The variable diameter pulley assembly comprises two components, referred to as a first variable diameter pulley assembly and a second variable diameter pulley assembly, respectively. The first and second variable diameter pulley assemblies are spaced apart relative to each other along a second direction, which intersects the axial direction of the rotating shaft. The drive belt is wound along the second direction around a plurality of sliders of the first and second variable diameter pulley assemblies. In the first variable diameter pulley assembly, the recessed area of ​​the camshaft is closer to the second variable diameter pulley assembly than the raised area, and in the second variable diameter pulley assembly, the recessed area of ​​the camshaft is closer to the first variable diameter pulley assembly than the raised area. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a variable diameter wheel assembly in one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the variable diameter wheel assembly in another state according to one embodiment of the present invention;

[0021] Figure 3 for Figure 1 Exploded view of part of the structure of the variable diameter wheel assembly;

[0022] Figure 4 for Figure 1 Another perspective of the exploded view of a portion of the structure of the variable diameter wheel assembly;

[0023] Figure 5 This is a schematic diagram of the concave-convex disc structure in a variable diameter wheel assembly according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the slider and pressure block in a variable diameter wheel assembly according to an embodiment of the present invention;

[0025] Figure 7 for Figure 6 An exploded view of part of the structure of a set of sliders and pressure blocks;

[0026] Figure 8 This is a schematic diagram of the structure of a variable-diameter continuously variable transmission (CVT) according to an embodiment of the present invention.

[0027] The components in the diagram are labeled as follows:

[0028] 1. Variable diameter continuously variable transmission; 10. Variable diameter wheel assembly; 110. Slider; 111. Load-bearing part; 112. Sliding part; 1121. Through hole; 113. Positioning support; 120. Clamping assembly; 121. Clamping block; 1211. Clamping part; 12111. Guide slope; 1212. Abutting part; 1213. Abutting block; 1214. Connecting part; 122. Driving component; 1221. Elastic component; 1222. Concave-convex disc; 12221. Recessed area; 12222. Protruding area; 12223. First transition area; 12224. Second transition area; 130. Rotating shaft; 140. Conical disc; 141. Conical surface; 142. Slide groove; 20. Transmission belt. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Please see Figures 1 to 4 as well as Figure 8 This application provides an embodiment of a variable diameter wheel assembly 10, including: a slider 110, a clamping assembly 120, a rotating shaft 130, and two conical discs 140 fixed on the rotating shaft 130. The two conical discs 140 are arranged at intervals relative to each other along the axial direction of the rotating shaft 130. The surface of one conical disc 140 facing the other conical disc 140 is a conical surface 141. Each of the two conical surfaces 141 is provided with a plurality of grooves 142. The plurality of grooves 142 are arranged at intervals along the circumferential direction of the conical discs 140. The guiding direction of the grooves 142 is parallel to the generatrix of the conical surface 141. A plurality of sliders 110 are provided, and each slider 110 corresponds one-to-one with a groove 142 on the conical disc 140. The slider 110 is located between the two conical discs 140, and both ends of the slider 110 can slide within the corresponding groove 142. The slider 110 can be used to support a transmission belt 20 wound on it. The clamping assembly 120 can be used to clamp the drive belt 20 wound on the slider 110.

[0031] The aforementioned variable diameter wheel assembly 10 includes a slider 110, a clamping assembly 120, a rotating shaft 130, and two conical discs 140 fixed on the rotating shaft 130. The conical surfaces 141 of the two conical discs 140 are spaced apart relative to each other along the axial direction of the rotating shaft 130. Since each of the two conical surfaces 141 is provided with multiple grooves 142, and the multiple grooves 142 are spaced apart along the circumferential direction of the conical discs 140, and the guiding direction of the grooves 142 is parallel to the generatrix of the conical surfaces 141, the multiple sliders 110 disposed between the two conical discs 140 can correspond one-to-one with the multiple grooves 142 and slide within the grooves 142. As the two conical discs 140 gradually approach each other, the slider 110 can move along the groove 142 away from the rotation shaft 130, and the radius of the circle formed by the multiple sliders 110 gradually increases; as the two conical discs 140 gradually move away from each other, the slider 110 can move along the groove 142 towards the rotation shaft 130, and the radius of the circle formed by the multiple sliders 110 gradually decreases. This changes the circumference of the transmission belt 20 wound around the slider 110 in the variable diameter wheel assembly 10. Since the slider 110 supports the transmission belt 20 during the rotation of the rotation shaft 130 and the conical discs 140, the friction between the transmission belt 20 and the variable diameter wheel assembly 10 during transmission is increased, thus improving the power transmission efficiency of the variable diameter wheel assembly 10. Furthermore, since the clamping assembly 120 can be used to clamp the transmission belt 20 wound on the slider 110, the friction between the transmission belt 20 and the slider 110 during rotation can be further increased, thus preventing the transmission belt 20 from slipping during operation and improving power transmission efficiency.

[0032] Please see Figure 3 , Figure 4 as well as Figures 6 to 8 Based on the above embodiments, in one embodiment, the pressing assembly 120 includes a pressing block 121 and a driving member 122. The pressing block 121 is slidable relative to the slider 110. The pressing block 121 includes a pressing part 1211 and an abutting part 1212 connected to each other. The abutting part 1212 is connected to the driving member 122. The driving member 122 causes the pressing block 121 to have a first state and a second state. When the pressing block 121 is in the first state, the pressing part 1211 can press the transmission belt 20 onto the slider 110. When the pressing block 121 is in the second state, the pressing part 1211 is separated from the transmission belt 20. In this way, the pressure block 121 can be in different states according to actual needs, which increases the pressure of the transmission belt 20 on the slider 110 without affecting the transmission process of the transmission belt 20. This makes the transmission belt 20 stably pressed on the slider 110, thereby increasing the friction between the transmission belt 20 and the variable diameter wheel assembly 10 during the transmission process, and thus improving the transmission efficiency of the transmission belt 20.

[0033] Specifically, in this embodiment, the pressure block 121 is movable relative to the slider 110 along the axial direction of the rotation shaft 130 on the slider 110. The transmission belt 20 is wound around the slider 110 and located between the pressure blocks 121 on two opposing conical discs 140. When it is necessary to use the pressure block 121 to press the transmission belt 20, the pressure block 121 is moved along the axial direction of the rotation shaft 130, so that the pressure block 121 moves toward the transmission belt 20. When it is necessary to separate the pressure block 121 from the transmission belt 20, the pressure block 121 is moved along the axial direction of the rotation shaft 130, so that the pressure block 121 moves away from the transmission belt 20.

[0034] Optionally, based on the above embodiments, in another embodiment, the pressure block 121 is capable of sliding relative to the slider 110 along a second direction. This second direction intersects the axial direction of the rotation shaft 130. When it is necessary to use the pressure block 121 to press the transmission belt 20, the pressure block 121 is moved along the second direction, causing it to move closer to the transmission belt 20. When it is necessary for the pressure block 121 to separate from the transmission belt 20, the pressure block 121 is moved along the second direction, causing it to move away from the transmission belt 20.

[0035] Optionally, in another embodiment, the clamping 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 can control the gripper to extend and retract in the 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 attracts the transmission belt 20 to tighten the transmission belt 20 on the slider 110. When the gripper is in the fourth state, the gripper retracts and separates from the transmission belt 20.

[0036] Please see Figures 3 to 5 Based on the above embodiments, in one embodiment, the driving member 122 includes an elastic member 1221 and a convex-concave disc 1222. Two convex-concave discs 1222 are provided, each corresponding to one of the two conical discs 140, and both convex-concave discs 1222 are sleeved on the rotating shaft 130. The convex-concave disc 1222 is located on the side of its corresponding conical disc 140 away from the other conical disc 140, and the conical disc 140 can rotate relative to the convex-concave disc 1222. Thus, when the conical disc 140 rotates with the rotating shaft 130 around the central axis of the rotating shaft 130, the convex-concave disc 1222 will not be affected by the rotating shaft 130 and can remain stationary.

[0037] For further information, please refer to [link / reference]. Figures 3 to 5 In this embodiment, the convex-concave disk 1222 has a conical structure, and the conical disk surface of the convex-concave disk 1222 faces the conical disk 140. For example... Figure 5As shown, the conical disk surface of the convex-concave disk 1222 includes a recessed area 12221 and a raised area 12222 arranged along the circumferential direction of the convex-concave disk 1222. In the axial direction of the rotation shaft 130, the distance between the recessed area 12221 and the conical disk 140 is greater than the distance between the raised area 12222 and the conical disk 140.

[0038] Furthermore, such as Figure 1 , Figure 3 , Figure 6 as well as Figure 7 As shown, in this embodiment, the slide groove 142 extends through the conical disk 140 along the axial direction of the rotation shaft 130. The pressure block 121 is located inside the slide groove 142, and the abutting portion 1212 of the pressure block 121 abuts against the conical disk surface of the concave-convex disk 1222. Multiple elastic elements 1221 are provided, and each elastic element 1221 corresponds to one of the multiple pressure blocks 121. The elastic element 1221 abuts between the slider 110 and the pressure block 121, allowing the pressure block 121 to slide on the slider 110 along the axial direction of the rotation shaft 130. The extension and retraction direction of the elastic element 1221 is parallel to the axial direction of the rotation shaft 130. Thus, when the abutting portion 1212 abuts against the protrusion 12222, the pressure block 121 is in a first state. At this time, the pressing portion 1211 protrudes outside the slide groove 142, and the pressing portion 1211 presses the transmission belt 20 against the slider 110. When the abutting part 1212 abuts against the recessed area 12221, the pressing block 121 is in the second state, and the pressing part 1211 retracts into the slide groove 142.

[0039] Optionally, in another embodiment, the drive member 122 includes an electrically operated telescopic rod. When the pressure block 121 is disposed within the slide groove 142, one end of the electrically operated telescopic rod is connected to the pressure block 121, and the other end of the electrically operated telescopic rod is slidably disposed within the slide groove 142. When the extension / retraction direction of the electrically operated telescopic rod is parallel to the axial direction of the rotation shaft 130, the pressure block 121 can move back and forth on the slider 110 along the axial direction of the rotation shaft 130. When the extension / retraction direction of the electrically operated telescopic rod intersects with the axial direction of the rotation shaft 130, the pressure block 121 can move closer to or further away from the slider 110 along the extension / retraction direction of the electrically operated telescopic rod.

[0040] Please see Figure 3 and Figure 5Based on the above embodiments, in one embodiment, the conical surface of the concave-convex disk 1222 further includes a first transition region 12223 and a second transition region 12224. The first transition region 12223, the recessed region 12221, the second transition region 12224, and the raised region 12222 are sequentially connected and arranged around the circumference of the concave-convex disk 1222. The distance between the first transition region 12223 and the conical disk 140, and the distance between the second transition region 12224 and the conical disk 140, both gradually decrease from the recessed region 12221 towards the raised region 12222. In other words, the surfaces of the first transition region 12223 and the second transition region 12224 are both inclined surfaces. In this way, the contact portion 1212 of the pressing block 121 abutting against the conical disc surface of the concave-convex disc 1222 can smoothly transition from the raised area 12222 to the recessed area 12221, and avoid the phenomenon of jamming when transitioning from the recessed area 12221 to the raised area 12222.

[0041] Specifically, in this embodiment, when the abutting part 1212 abuts against the first transition zone 12223, the pressing block 121 is gradually switching from the first state to the second state. When the abutting part 1212 abuts against the second transition zone 12224, the pressing block 121 is gradually switching from the second state to the first state.

[0042] Please see Figures 6 to 8 To prevent the elastic element 1221 from deflecting during extension and retraction, in one embodiment, based on the above embodiments, the portion of the slider 110 used to support the transmission belt 20 is called the load-bearing portion 111. The portion of the slider 110 that slides within the groove 142 is called the sliding portion 112. The load-bearing portion 111 is connected to the sliding portion 112. A positioning support 113 is provided on the end face of the sliding portion 112 facing the concave-convex disc 1222. The elastic element 1221 includes a first end and a second end that are oppositely disposed and connected. The first end abuts against the positioning support 113, and the second end abuts against the pressure block 121.

[0043] Specifically, in this embodiment, the elastic element 1221 is a compression spring. One end of the compression spring is sleeved on the positioning support 113, while the other end abuts against the pressure block 121. In this way, under the action of the positioning support 113, the compression spring can be prevented from shaking during compression, thus improving the stability of the compression spring during compression.

[0044] Please see Figure 6 and Figure 7 Furthermore, to facilitate the contact between the elastic element 1221 and the pressure block 121, a pressure block 1213 is provided on the pressure block 121. Specifically, when the pressure block 121 is slidably disposed on the slider 110, the pressure block 1213 is opposite to the positioning support 113, and the second end of the elastic element 1221 abuts against the pressure block 1213.

[0045] Optionally, the elastic element 1221 can be fixedly connected to the positioning support 113 and the pressing block 1213. This prevents the elastic element 1221 from falling off during the extension and retraction process, thus affecting the working effect of the pressing block 121. Alternatively, the elastic element 1221 can be detachably connected to the positioning support 113 and the pressing block 1213. This allows for easy replacement by operators if any component of the slider 110, the pressing block 121, or the elastic element 1221 is damaged.

[0046] In a continuously variable transmission (CVT), the drive belt 20 is typically composed of multiple steel sheets arranged sequentially and connected to form a closed loop. Therefore, small gaps exist between the steel sheets. To further improve the friction between the drive belt 20 and the slider 110, in one embodiment, based on the above embodiments, the contact surface of the load-bearing part 111 that contacts the drive belt 20 is provided with protruding teeth (not shown in the figure). These protruding teeth can engage with the gaps formed between the steel sheets within the drive belt 20.

[0047] Alternatively, in another embodiment, the surface of the load-bearing part 111 that contacts the transmission belt 20 is a smooth contact surface.

[0048] It should be noted that the "smooth contact surface" referred to in the embodiments does not refer to an absolutely smooth contact surface under ideal conditions.

[0049] Optionally, in order to increase the friction between the load-bearing part 111 on the slider 110 and the transmission belt 20, the surface of the load-bearing part 111 that contacts the transmission belt 20 is a contact surface with a relatively large roughness. In this way, the friction between the load-bearing part 111 and the transmission belt 20 can be effectively increased.

[0050] Please continue reading. Figure 1 , Figure 6 and Figure 7 Based on the above embodiments, in one embodiment, the pressure block 121 further includes a connecting portion 1214 connecting the pressing portion 1211 and the abutting portion 1212. To enable the pressure block 121 to move along the guide direction of the slide groove 142 with the slider 110, 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 pressure block 121. The connecting portion 1214 of the pressure block 121 can pass through the through hole 1121. Thus, the pressure block 121 can slide along the guide direction of the slide groove 142 with the slider 110, and the pressure block 121 can also slide on the slider 110 within the through hole 1121 along the axial direction of the rotation shaft 130.

[0051] It should be noted that "the shape and size of the through hole 1121 are adapted to the shape and size of the connecting part 1214 of the pressure block 121" means that the shape of the through hole 1121 on the sliding part 112 is the same as the shape of the connecting part 1214 of the pressure block 121, and the size of the through hole 1121 is slightly larger than the size of the connecting part 1214 of the pressure block 121. In this way, the connecting part 1214 can pass through the through hole 1121, and the connecting part 1214 can drive the entire pressure block 121 to move within the through hole 1121. For example, in this embodiment, the through hole 1121 has a rectangular structure, and the connecting part 1214 of the pressure block 121 has a cubic column structure.

[0052] It should be noted that, in this embodiment, as Figure 7 As shown, when the through hole 1121 is a rectangular structure, the dimensions of the through hole 1121 refer to the lengths of each side of the rectangular structure, and each side length can be divided into two categories, namely the width W of the through hole 1121. h and height H h The dimension of the connecting part 1214 refers to the width W of the cubic column. c With thickness H c At this time, W h Slightly larger than W c H h It should be slightly larger than H c .

[0053] Based on the above embodiments, in one embodiment, the end face of the abutment portion 1212 of the pressure block 121 is arc-shaped. This improves the smoothness of the abutment portion 1212 when sliding on the recessed area 12221, the raised area 12222, the first transition area 12223, and the second transition area 12224.

[0054] Further, please refer to Figure 3 , Figure 4 and Figure 7 In this embodiment, the pressing portion 1211 of the pressure block 121 is provided with a smooth guide slope 12111. The guide slope 12111 is inclined relative to the central axis of the rotation shaft 130. The two ends of the guide slope 12111 along the first direction are the top end and the bottom end, respectively, and the bottom end is closer to the slider 110 relative to the top end along the first direction. The first direction intersects the axial direction of the rotation shaft 130. Along the axial direction of the rotation shaft 130, the bottom end is closer to the drive member 122 relative to the top end. Thus, when the pressing portion 1211 of the pressure block 121 extends out of the slide groove 142, the guide slope 12111 can press against the transmission belt 20.

[0055] In order to facilitate a clear understanding of the setting direction of the first direction in this embodiment, Figure 7 For example, the first direction is Figure 7 The direction indicated by S1.

[0056] Furthermore, the angle between the guide slope 12111 and the central axis of the rotating shaft 130 is 65°-75°.

[0057] Specifically, in this embodiment, the angle between the guide slope 12111 and the central axis of the rotation shaft 130 is 70°.

[0058] Please see Figure 8 This application also provides a variable diameter continuously variable transmission 1, including a drive belt 20 and a variable diameter pulley assembly 10 as described above. Two variable diameter pulley assemblies 10 are provided, respectively referred to as a first variable diameter pulley assembly 10 and a second variable diameter pulley assembly 10. The first and second variable diameter pulley assemblies 10 are arranged at intervals relative to each other along a second direction. The second direction intersects the axial direction of the rotation shaft 130. The drive belt 20 is wound along the second direction around a plurality of sliders 110 of the first and second variable diameter pulley assemblies 10.

[0059] The aforementioned variable diameter continuously variable transmission 1 includes a drive belt 20 and two variable diameter pulley assembly 10. The first variable diameter pulley assembly and the second variable diameter pulley assembly 10 are arranged at intervals relative to each other along the second direction, and the drive belt 20 is wound around the multiple sliders 110 of the first variable diameter pulley assembly 10 and the multiple sliders 110 of the second variable diameter pulley assembly 10 along the second direction. As the two conical discs 140 in the first variable-diameter wheel assembly 10 gradually move closer together and the two conical discs 140 in the second variable-diameter wheel assembly 10 gradually move away from each other, the circumference of the transmission belt 20 wrapped around the slider 110 of the first variable-diameter wheel assembly 10 increases, and the circumference of the transmission belt 20 wrapped around the slider 110 of the second variable-diameter wheel assembly 10 decreases; conversely, as the two conical discs 140 in the first variable-diameter wheel assembly 10 gradually move away from each other and the two conical discs 140 in the second variable-diameter wheel assembly 10 gradually move closer together, the circumference of the transmission belt 20 wrapped around the slider 110 of the first variable-diameter wheel assembly 10 decreases, and the circumference of the transmission belt 20 wrapped around the slider 110 of the second variable-diameter wheel assembly 10 increases. In this way, continuously variable transmission can be achieved while increasing the friction between the transmission belt 20 and both the driving and driven wheel assemblies. Furthermore, since the clamping assembly 120 can be used to clamp the transmission belt 20 wound on the slider 110, the friction between the transmission belt 20 and the slider 110 during rotation can be increased, thus preventing the transmission belt 20 from slipping during operation and improving the power transmission efficiency of the continuously variable transmission.

[0060] In order to facilitate a clear understanding of the setting direction of the second direction in this embodiment, Figure 8 For example, the second direction is Figure 8 The direction indicated by S2.

[0061] To press the transmission belt 20 in contact with the slider 110 onto the slider 110 without affecting the transmission of the portion of the transmission belt 20 separated from the slider 110, this application also provides a variable diameter continuously variable transmission 1, including a transmission belt 20 and a variable diameter pulley assembly 10 as described above. Two variable diameter pulley assemblies 10 are provided, respectively referred to as a first variable diameter pulley assembly 10 and a second variable diameter pulley assembly 10. The first and second variable diameter pulley assemblies 10 are arranged at intervals relative to each other along a second direction. The second direction intersects the axial direction of the rotation shaft 130. The transmission belt 20 is wound along the second direction around a plurality of sliders 110 of the first variable diameter pulley assembly 10 and a plurality of sliders 110 of the second variable diameter pulley assembly 10. The recessed area 12221 of the camshaft 1222 in the first variable diameter pulley assembly 10 is closer to the second variable diameter pulley assembly 10 than the protruding area 12222. In the second variable diameter wheel assembly 10, the recessed area 12221 of the concave-convex disc 1222 is closer to the first variable diameter wheel assembly 10 than the raised area 12222.

[0062] When the transmission belt 20 is wound around the sliders 110 of the first variable diameter wheel assembly 10 and the second variable diameter wheel assembly 10, since the number of sliders 110 covered by the transmission belt 20 is greater than the number of sliders 110 uncovered, correspondingly, based on the above embodiment, in one embodiment, on the conical surface of the concave-convex disc 1222, the area of ​​the recessed area 12221 is smaller than the area of ​​the raised area 12222. This allows the pressure block 121 on the slider 110 covered by the transmission belt 20 to extend out of the groove 142 and press firmly against the transmission belt 20.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0064] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A variable diameter wheel assembly, characterized in that, include: The system comprises a slider, a clamping assembly, a rotating shaft, and two conical disks fixed on the rotating shaft. The two conical disks are spaced apart relative to each other along the axial direction of the rotating shaft. The surface of one conical disk facing the other is a conical surface. Multiple grooves are provided on both conical surfaces, spaced apart along the circumferential direction of the conical disks. The guiding direction of the grooves is parallel to the generatrix of the conical surface. Multiple sliders are provided, each corresponding one-to-one with a groove on a conical disk. Each slider is positioned between two conical disks, and both ends of the slider are slidably mounted on their corresponding grooves. Within the groove, the slider can support the transmission belt wound thereon, and the clamping assembly can clamp the transmission belt wound on the slider. The clamping assembly includes a clamping block and a driving member. The clamping block can slide relative to the slider. The clamping block includes a clamping part and an abutting part connected to each other. The abutting part is connected to the driving member. The driving member causes the clamping block to have a first state and a second state. When the clamping block is in the first state, the clamping part can clamp the transmission belt onto the slider. When the clamping block is in the second state, the clamping part is separated from the transmission belt. The driving component includes an elastic element and two concave-convex discs. Each concave-convex disc corresponds one-to-one with one of the two conical discs, and both concave-convex discs are sleeved on the rotating shaft. Each concave-convex disc is located on the side of its corresponding conical disc away from the other conical disc, and the conical disc is rotatable relative to the concave-convex disc. The concave-convex disc has a conical structure, with its conical surface facing the conical disc. The conical surface of the concave-convex disc includes a recessed area and a raised area arranged along the circumferential direction of the concave-convex disc. The distance between the recessed area and the conical disc in the axial direction of the rotating shaft is greater than the distance between the raised area and the conical disc. The sliding groove penetrates the conical disc along the axial direction of the rotating shaft. The block is located in the groove, and the abutting part of the pressing block abuts against the conical disk surface of the concave-convex disk. Multiple elastic elements are provided, and each elastic element corresponds to one of the multiple pressing blocks. The elastic elements abut between the slider and the pressing block, so that the pressing block can slide on the slider along the axial direction of the rotation shaft. The extension and retraction direction of the elastic elements is parallel to the axial direction of the rotation shaft. When the abutting part abuts against the convex area, the pressing block is in the first state, and the pressing part protrudes from the groove and presses the transmission belt against the slider. When the abutting part abuts against the concave area, the pressing block is in the second state, and the pressing part retracts into the groove.

2. The variable diameter wheel assembly according to claim 1, characterized in that, The conical surface of the concave-convex disk further includes a first transition area and a second transition area. The first transition area, the concave area, the second transition area, and the convex area are sequentially connected around the circumferential direction of the concave-convex disk. The distance between the first transition area and the concave disk and the distance between the second transition area and the concave disk gradually decrease from the concave area towards the convex area. When the abutting part abuts against the first transition area, the pressing block is gradually switching from the first state to the second state. When the abutting part abuts against the second transition area, the pressing block is gradually switching from the second state to the first state.

3. The variable diameter wheel assembly according to claim 1, characterized in that, The portion of the slider used to support the transmission belt is called the load-bearing portion, and the portion of the slider that slides within the groove is called the sliding portion. The load-bearing portion is connected to the sliding portion, and a positioning support is provided on the end face of the sliding portion facing the concave-convex disc. The elastic element includes a first end and a second end that are arranged opposite to each other and connected. The first end abuts against the positioning support, and the second end abuts against the pressure block.

4. The variable diameter wheel assembly according to claim 3, characterized in that, The pressure block is provided with a pressing block. When the pressure block is slidably disposed on the slider, the pressing block is opposite to the positioning support, and the second end of the elastic member abuts against the pressing block.

5. The variable diameter wheel assembly according to claim 3, characterized in that, The contact surface of the load-bearing part that is in contact with the transmission belt is provided with protruding teeth, which can engage with the gaps formed between the steel sheets in the transmission belt. Alternatively, the surface of the load-bearing part that contacts the transmission belt is a smooth contact surface; And / or, the pressure block further includes a connecting portion connected between the pressing portion and the abutting portion, the sliding portion having a through hole, the shape and size of the through hole being adapted to the shape and size of the connecting portion of the pressure block, the connecting portion of the pressure block being able to pass through the through hole.

6. The variable diameter wheel assembly according to any one of claims 1-5, characterized in that, The end face of the abutting part of the pressure block is arc-shaped, and the pressing part of the pressure block is provided with a smooth guide slope. The guide slope is inclined relative to the central axis of the rotating shaft. The two ends of the guide slope along the first direction are the top end and the bottom end, respectively. Along the first direction, the bottom end is closer to the slider than the top end. The first direction intersects the axial direction of the rotating shaft. Along the axial direction of the rotating shaft, the bottom end is closer to the driving member than the top end.

7. A variable-diameter continuously variable transmission, characterized in that, The device includes a transmission belt and a variable diameter wheel assembly as described in any one of claims 1-6. The variable diameter wheel assembly comprises two components, referred to as a first variable diameter wheel assembly and a second variable diameter wheel assembly, which are arranged at intervals relative to each other along a second direction. The second direction intersects the axial direction of the rotating shaft. The transmission belt is wound along the second direction around a plurality of sliders of the first variable diameter wheel assembly and a plurality of sliders of the second variable diameter wheel assembly.

8. A variable-diameter continuously variable transmission, characterized in that, The assembly includes a transmission belt and a variable diameter wheel assembly as described in any one of claims 1-6. The variable diameter wheel assembly comprises two components, referred to as a first variable diameter wheel assembly and a second variable diameter wheel assembly, respectively. The first and second variable diameter wheel assemblies are spaced apart from each other along a second direction, which intersects the axial direction of the rotating shaft. The transmission belt is wound along the second direction around a plurality of sliders of the first and second variable diameter wheel assemblies. In the first variable diameter wheel assembly, the recessed area of ​​the camshaft is closer to the second variable diameter wheel assembly than the raised area, and in the second variable diameter wheel assembly, the recessed area of ​​the camshaft is closer to the first variable diameter wheel assembly than the raised area.

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