Clutch assembly for electric power-assisted bicycle

Abstract

The utility model relates to the technical field of electric power-assisted bicycles, in particular to a clutch assembly used for an electric power-assisted bicycle, an extrusion cavity is formed between the inner circumference of a power output ring and an extrusion part, a gap of the extrusion cavity is gradually increased or gradually reduced in the circumferential direction of the extrusion cavity, and a plurality of supporting blocks are clamped with a plurality of positioning grooves in a one-to-one correspondence mode. The pin rollers are arranged in the extrusion cavity and abut against the position between the inner circumference of the power output ring and the extrusion part, and the elastic pieces and the pin rollers are arranged between the two adjacent supporting blocks. During operation, the motor drives the inner tooth power ring to rotate clockwise, under the thrust action of the elastic piece, the pin rollers are driven to rotate in the extrusion cavity in the direction in which the gaps are gradually reduced, at the moment, the pin rollers and the inner circumference of the power output ring are in extrusion engagement with the extrusion part, and the pin rollers are always stressed under the action of the elastic piece; the inner circumference of the roller driving and power output ring is always in meshing transmission with the extrusion part quickly and actively, the response speed is high, power transmission is smooth, and riding comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power-assisted bicycles, in particular to a clutch assembly used for electric power-assisted bicycles. Background Art

[0002] An electric power-assisted bicycle is a new type of two-wheeled vehicle, a type of bicycle. It uses batteries as an auxiliary power source, is equipped with a motor, and has a power-assist system. It is a new type of transportation that can realize the integration of human riding and motor assistance. Its motor is connected to the frame and connected to the rear wheel through a chain to transmit power. Pedals are installed on both sides of the motor. When the motor is not working, that is, when there is no power supply, the rider can achieve human riding by pedaling, and the resistance is no different from that of a normal bicycle.

[0003] However, during the riding process, the existing electric power-assisted bicycles are affected by the toothed torque of the electric power-assisted bicycle motor, resulting in poor riding comfort. At the same time, when the electric power-assisted bicycle motor is not working and is free gliding, the gliding distance will be greatly shortened. Utility Model Content

[0004] The utility model aims to provide a clutch assembly for an electric power-assisted bicycle, which can improve riding comfort.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a clutch assembly for an electric power-assisted bicycle, comprising:

[0007] An inner-tooth power ring, wherein a plurality of positioning grooves and a plurality of extrusion portions are alternately arranged on the outer circumference of the inner-tooth power ring;

[0008] A power output ring, wherein the power output ring is sleeved at intervals on the outer circumference of the inner gear power ring, so that an extrusion cavity is formed between the inner circumference of the power output ring and the extrusion portion, and the gap of the extrusion cavity gradually increases or decreases along its own circumference. The electric power-assisted bicycle comprises a wheel hub and a motor, wherein the power output ring is fixedly connected to the wheel hub, and the motor is drivingly connected to the inner gear power ring and can drive the inner gear power ring to rotate;

[0009] A cage assembly, the cage assembly comprising a plurality of support blocks spaced apart along the circumferential direction, the plurality of support blocks being engaged with the plurality of positioning grooves in a one-to-one correspondence;

[0010] A number of rollers and a number of elastic members, the rollers are arranged in the extrusion cavity, and the rollers are abutted between the inner circumference of the power output ring and the extrusion part. The elastic members and the rollers are arranged between two adjacent support blocks, and the number of the rollers and the number of the elastic members are arranged in one-to-one correspondence. The elastic members are configured to apply a force to the rollers so that the rollers abut against the side walls of the support blocks.

[0011] As a preferred technical solution of the above clutch assembly for an electric assist bicycle, the power output ring includes a first output part and a first connecting part. The first connecting part is axially connected to the first output part, and the outer diameter of the first output part is greater than the outer diameter of the first connecting part. The internal gear power ring includes a second output part and a second connecting part. The second connecting part is axially connected to the second output part, and the outer diameter of the second output part is greater than the outer diameter of the second connecting part. A number of the positioning grooves and a number of the extrusion parts are alternately arranged on the outer circumference of the second output part, and the first output part is sleeved on the outer circumference of the second output part at intervals.

[0012] As a preferred technical solution of the above clutch assembly for an electric assist bicycle, the clutch assembly for an electric assist bicycle further includes a plurality of balls. A first rolling groove is recessed on the inner circumference of the first connecting part, and a second rolling groove is recessed on the outer circumference of the second connecting part. The inner circumference of the first connecting part is sleeved on the outer circumference of the second connecting part at intervals, so that the first rolling groove and the second rolling groove enclose a raceway, and a plurality of the balls are arranged to roll in the raceway.

[0013] As a preferred technical solution of the above clutch assembly for an electric assist bicycle, the clutch assembly for an electric assist bicycle further includes a support frame. A number of support bodies are arranged on the support frame in the circumferential direction, and the number of the support bodies and the number of the balls are correspondingly clamped one by one.

[0014] As a preferred technical solution of the above clutch assembly for an electric assist bicycle, the support body has an open spherical arc-shaped semi-surrounding structure.

[0015] As a preferred technical solution of the above clutch assembly for an electric assist bicycle, the second output part and the second connecting part are integrally formed.

[0016] As a preferred technical solution of the above clutch assembly for an electric assist bicycle, the elastic member has an S-shaped plate structure.

[0017] As a preferred technical solution of the above clutch assembly for an electric assist bicycle, the support block includes a clamping portion and a limiting portion which are vertically connected. A plurality of the clamping portions are arranged in one-to-one correspondence with a plurality of the positioning grooves, and the clamping portion is clamped in the positioning groove. The elastic member and the roller are abutted between two adjacent limiting portions.

[0018] As a preferred technical solution of the above clutch assembly for an electric assist bicycle, the limiting portion is provided with an extrusion groove which is arc-shaped. The roller is abutted between the groove wall of the extrusion groove and the elastic member, and the bottom end of the elastic member is supported on the clamping portion.

[0019] As a preferred technical solution of the above clutch assembly for an electric assist bicycle, the cage assembly further includes a cover plate which is connected to a plurality of the support blocks. The inner tooth power ring is recessed with a mounting groove along its circumferential direction. The cover plate is annular and is embedded in the mounting groove.

[0020] The beneficial effects of the present utility model are as follows:

[0021] The present utility model provides a clutch assembly for an electric assist bicycle. The clutch assembly for the electric assist bicycle includes: an internal gear power ring, a power output ring, a cage assembly, a plurality of rollers and a plurality of elastic members. A plurality of positioning grooves and a plurality of pressing portions are alternately provided on the outer periphery of the internal gear power ring. The power output ring is sleeved on the outer periphery of the internal gear power ring at intervals, so that a pressing cavity is formed between the inner periphery of the power output ring and the pressing portions. The gap of the pressing cavity gradually increases or gradually decreases along its circumferential direction. The electric assist bicycle includes a wheel hub and a motor. The power output ring is fixedly connected to the wheel hub, and the motor is drivingly connected to the internal gear power ring and can drive the internal gear power ring to rotate. The cage assembly includes a plurality of support blocks arranged at intervals in the circumferential direction. The plurality of support blocks are respectively and correspondingly clamped with the plurality of positioning grooves. The rollers are arranged in the pressing cavity, and the rollers abut between the inner periphery of the power output ring and the pressing portions. The elastic members and the rollers are arranged between two adjacent support blocks. The plurality of rollers and the plurality of elastic members are arranged in one-to-one correspondence. The elastic members are configured to apply a force to the rollers so that the rollers abut against the side walls of the support blocks. With such a setting, when the motor operates, the motor drives the internal gear power ring to rotate clockwise. At the same time, under the action of the thrust of the elastic members, the rollers are driven to rotate in the pressing cavity along the direction of gradually decreasing gap. At this time, the rollers form a pressing engagement with the inner periphery of the power output ring and the pressing portions. Moreover, the rollers are always under force under the action of the thrust of the elastic members, so that the rollers quickly and actively engage and transmit power with the inner periphery of the power output ring and the pressing portions all the time, with a fast response speed and smooth power transmission, and the structure is more stable and reliable, driving the power output ring to rotate, and finally transmitting the motor power to the wheel hub, greatly improving the riding comfort. When the motor does not work, that is, when the internal gear power ring does not rotate, the wheel hub is in a free sliding state, and the power output ring rotates freely clockwise. The rollers rotate in the pressing cavity along the direction of gradually increasing gap. At this time, the rollers rotate freely in the "large gap" cavity, only contact but do not engage with the inner periphery of the power output ring and the pressing portions, and are in a disengaged state, achieving the purpose of the one-way operation of the clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded view of the clutch assembly for an electric assist bicycle provided by the present utility model;

[0023] Figure 2 is a schematic structural view of the clutch assembly for an electric assist bicycle provided by the present utility model from a first perspective;

[0024] Figure 3 is a sectional view of the clutch assembly for an electric assist bicycle provided by the present utility model;

[0025] Figure 4 is a schematic structural view of the clutch assembly for an electric assist bicycle provided by the present utility model from a second perspective;

[0026] Figure 5 Structural schematic of the internal gear power ring provided by the present utility model Figure 1 ;

[0027] Figure 6 is Figure 5 the partial enlarged view of part A in

[0028] Figure 7 Structural schematic of the internal gear power ring provided by the present utility model Figure 2 ;

[0029] Figure 8 Structural schematic of the internal gear power ring provided by the present utility model Figure 3 ;

[0030] Figure 9 is Figure 8 the partial enlarged view of part B in

[0031] Figure 10 Structural schematic diagram of the power output ring provided by the present utility model;

[0032] Figure 11 Cross-sectional view of the power output ring provided by the present utility model;

[0033] Figure 12 Structural schematic of the support frame provided by the present utility model Figure 1 ;

[0034] Figure 13 Structural schematic of the support frame provided by the present utility model Figure 2 ;

[0035] Figure 14 Partial structural schematic diagram of the cage assembly provided by the present utility model;

[0036] Figure 15 Structural schematic diagram of the elastic member provided by the present utility model;

[0037] Figure 16 Structural schematic diagram of the cover plate provided by the present utility model.

[0038] Wherein:

[0039] 1. Internal gear power ring; 101. Positioning groove; 102. Extrusion part; 103. Second output part; 104. Second connection part; 1041. Second rolling groove; 105. Installation groove;

[0040] 2. Power output ring; 201. First output part; 202. First connection part; 2021. First rolling groove;

[0041] 3. Cage assembly; 301. Support block; 3011. Clamping portion; 3012. Limiting portion;

[0042] 4. Roller; 5. Elastic member; 6. Ball;

[0043] 7. Support frame; 701. Support body;

[0044] 8. Extrusion groove; 9. Cover plate; 10. Limiting step. Detailed implementation manner

[0045] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0047] Unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may also include the first feature and the second feature not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly under and obliquely under the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0049] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0050] As Figures 1 to 16 shown, this embodiment provides a clutch assembly for an electric assist bicycle. The clutch assembly for the electric assist bicycle includes: an internal gear power ring 1, a power output ring 2, a cage assembly 3, a plurality of rollers 4 and a plurality of elastic members 5. A plurality of positioning grooves 101 and a plurality of pressing portions 102 are alternately provided on the outer periphery of the internal gear power ring 1. The power output ring 2 is sleeved at intervals on the outer periphery of the internal gear power ring 1, so that a pressing cavity is formed between the inner periphery of the power output ring 2 and the pressing portion 102, and the gap of the pressing cavity gradually increases or gradually decreases along its circumferential direction. The electric assist bicycle includes a wheel hub and a motor. The power output ring 2 is fixedly connected to the wheel hub, and the motor is drivingly connected to the internal gear power ring 1 and can drive the internal gear power ring 1 to rotate. The cage assembly 3 includes a plurality of support blocks 301 arranged at intervals in the circumferential direction. The plurality of support blocks 301 are respectively and correspondingly clamped with the plurality of positioning grooves 101. The rollers 4 are arranged in the pressing cavity, and the rollers 4 abut between the inner periphery of the power output ring 2 and the pressing portion 102. The elastic members 5 and the rollers 4 are arranged between two adjacent support blocks 301. The plurality of rollers 4 and the plurality of elastic members 5 are arranged in one-to-one correspondence. The elastic member 5 is configured to apply a force to the roller 4 so that the roller 4 abuts against the side wall of the support block 301. With such a setting, when the motor operates, the motor drives the internal gear power ring 1 to rotate clockwise. At the same time, under the thrust of the elastic member 5, the roller 4 is driven to rotate in the pressing cavity along the direction in which the gap gradually decreases. At this time, the roller 4 forms a pressing engagement with the inner periphery of the power output ring 2 and the pressing portion 102. Moreover, the roller 4 is always under force under the thrust of the elastic member 5, so that the roller 4 quickly and actively engages and transmits power with the inner periphery of the power output ring 2 and the pressing portion 102 all the time, with a fast response speed and smooth power transmission, and the structure is more stable and reliable, driving the power output ring 2 to rotate, and finally transmitting the motor power to the wheel hub, greatly improving the riding comfort.

[0051] When the motor is not working, that is, when the inner gear power ring 1 does not rotate, the hub is in a free sliding state, and the power output ring 2 rotates freely clockwise. The roller 4 runs in the extrusion cavity along the direction of gradually increasing gap. At this time, the roller 4 rotates freely in the "large gap" cavity, only contacts but does not mesh with the inner circumference of the power output ring 2 and the extrusion part 102, and is in a disengaged state, achieving the purpose of the one-way operation of the clutch.

[0052] It should be noted that, please refer to Figure 6 and Figure 11 As shown, the plane where the extrusion part 102 contacts the roller 4 is the first extrusion surface, and the first extrusion surface is a tapered special-shaped structural surface with a one-way trend or angle. The plane where the inner circumference of the power output ring 2 contacts the roller 4 is the second extrusion surface, and the second extrusion surface is a smooth circumferential surface. An extrusion cavity with a gap change trend from "small to large" or "large to small" is formed between the first extrusion surface and the second extrusion surface.

[0053] Optionally, please refer to Figure 7 and Figure 10 As shown, the power output ring 2 includes a first output part 201 and a first connecting part 202. The first connecting part 202 is axially connected to the first output part 201, and the outer diameter of the first output part 201 is greater than the outer diameter of the first connecting part 202. The inner gear power ring 1 includes a second output part 103 and a second connecting part 104. The second connecting part 104 is axially connected to the second output part 103, and the outer diameter of the second output part 103 is greater than the outer diameter of the second connecting part 104. A plurality of positioning grooves 101 and a plurality of extrusion parts 102 are alternately arranged on the outer circumference of the second output part 103, and the first output part 201 is sleeved at intervals on the outer circumference of the second output part 103.

[0054] Optionally, please refer to Figure 8 and Figure 11As shown in the figure, the clutch assembly for an electric assist bicycle further includes a plurality of balls 6. An inner circumference of the first connecting portion 202 is recessed with a first rolling groove 2021, and an outer circumference of the second connecting portion 104 is recessed with a second rolling groove 1041. The inner circumference of the first connecting portion 202 is sleeved on the outer circumference of the second connecting portion 104 at intervals, so that the first rolling groove 2021 and the second rolling groove 1041 enclose a raceway, and the plurality of balls 6 are rotatably arranged in the raceway. With such a setting, a certain number of balls 6 can be evenly distributed within the circumference of the raceway. It can not only enable the inner tooth power ring 1 and the power output ring 2 to rotate stably and concentrically, but also limit the axial movement of the inner tooth power ring 1 within the circumference of the power output ring 2, that is, a "support and load-bearing" structure and function will be formed between the inner tooth power ring 1 and the power output ring 2, so that a stable support is formed radially and a concentric rotation structure is formed, greatly reducing the friction and loss during the operation of the motor. The power output ring 2 can slide freely with low friction and will not drive the rotation of the inner tooth power ring 1, enabling the electric assist bicycle to slide farther and achieving the purpose of increasing the cruising range.

[0055] It should be noted that the number of balls 6 and rollers 4 can be set according to actual needs and will not be further limited here.

[0056] Optionally, in order to position the balls 6 in the support body 701 without coming out and taking into account the smooth low-friction rotation of the balls 6 in the support body 701, the clutch assembly for an electric assist bicycle further includes a support frame 7. The support frame 7 is provided with a plurality of support bodies 701 along the circumferential direction, and the plurality of support bodies 701 are respectively and correspondingly clamped with the plurality of balls 6. Specifically, the support body 701 has an open spherical arc-shaped semi-surrounding structure.

[0057] Optionally, the second output portion 103 and the second connecting portion 104 are integrally formed.

[0058] Optionally, the elastic member 5 has an S-shaped plate structure.

[0059] Optionally, the support block 301 is Z-shaped and includes a clamping portion 3011 and a limiting portion 3012 that are vertically connected. The plurality of clamping portions 3011 are respectively and correspondingly arranged with the plurality of positioning grooves 101, and the clamping portion 3011 is clamped in the positioning groove 101. The elastic member 5 and the roller 4 are abutted between two adjacent limiting portions 3012.

[0060] Optionally, in order to ensure the smoothness of the roller 4 during operation, the limiting portion 3012 is provided with an extrusion groove 8. The extrusion groove 8 is arc-shaped. The roller 4 is abutted between the groove wall of the extrusion groove 8 and the elastic member 5, and the bottom end of the elastic member 5 is supported on the clamping portion 3011.

[0061] Further, a limiting step 10 is formed on the limiting portion 3012. A limiting plate is provided at one end of the cage assembly 3 close to the second connecting portion 104 along the axial direction. The limiting plate is connected to a plurality of support blocks 301. The top wall of the clamping portion 3011, the inner wall of the limiting plate, and the side walls of the support blocks 301 enclose a receiving groove. When the elastic member 5 is installed in this receiving groove, it is limited in both the radial and axial directions, ensuring the working range of the elastic member 5. At the same time, under the structure of the limiting step 10, the elastic member 5 is prevented from interfering with and contacting the inner wall of the power output ring 2.

[0062] Optionally, please refer to Figure 8 , Figure 9 and Figure 16 As shown, the cage assembly 3 further includes a cover plate 9. The cover plate 9 is connected to a plurality of support blocks 301. The inner tooth power ring 1 is recessed with an installation groove 105 along its circumferential direction. The cover plate 9 is annular and is embedded in the installation groove 105, ensuring the axial fixed limit of the cover plate 9, the internal rollers 4, a plurality of support blocks 301, the elastic member 5, etc. Of course, in other embodiments, the cover plate 9 can also be set as a snap ring structure.

[0063] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A clutch assembly for an electric power-assisted bicycle, characterized in that: include: An internal gear power ring (1), wherein a plurality of positioning grooves (101) and a plurality of extrusion portions (102) are alternately arranged on the outer circumference of the internal gear power ring (1); A power output ring (2), wherein the power output ring (2) is sleeved on the outer circumference of the inner gear power ring (1) at intervals, so that an extrusion cavity is formed between the inner circumference of the power output ring (2) and the extrusion portion (102), and the gap of the extrusion cavity gradually increases or decreases along its own circumference. The electric power-assisted bicycle comprises a wheel hub and a motor, wherein the power output ring (2) is fixedly connected to the wheel hub, and the motor is drivingly connected to the inner gear power ring (1) and can drive the inner gear power ring (1) to rotate; A retainer assembly (3), the retainer assembly (3) comprising a plurality of support blocks (301) arranged at intervals along the circumferential direction, the plurality of support blocks (301) being clamped in one-to-one correspondence with the plurality of positioning grooves (101); A plurality of rollers (4) and a plurality of elastic members (5), wherein the rollers (4) are arranged in the extrusion cavity, and the rollers (4) abut against the inner periphery of the power output ring (2) and the extrusion portion (102), the elastic members (5) and the rollers (4) are arranged between two adjacent support blocks (301), the plurality of rollers (4) and the plurality of elastic members (5) are arranged in a one-to-one correspondence, and the elastic members (5) are configured to give the rollers (4) a force so that the rollers (4) abut against the side walls of the support blocks (301).

2. The clutch assembly for an electric power-assisted bicycle according to claim 1, characterized in that: The power output ring (2) comprises a first output part (201) and a first connecting part (202), the first connecting part (202) is axially connected to the first output part (201), and the outer diameter of the first output part (201) is greater than the outer diameter of the first connecting part (202); the internal gear power ring (1) comprises a second output part (103) and a second connecting part (104), the second connecting part (104) is axially connected to the second output part (103), and the outer diameter of the second output part (103) is greater than the outer diameter of the second connecting part (104); a plurality of the positioning grooves (101) and a plurality of the extrusion parts (102) are alternately arranged on the outer periphery of the second output part (103), and the first output part (201) is sleeved on the outer periphery of the second output part (103) at intervals.

3. The clutch assembly for an electric power-assisted bicycle according to claim 2, characterized in that: The clutch assembly for the electric power-assisted bicycle also includes a plurality of balls (6); the inner circumference of the first connecting part (202) is recessed with a first rolling groove (2021); the outer circumference of the second connecting part (104) is recessed with a second rolling groove (1041); the inner circumference of the first connecting part (202) is sleeved on the outer circumference of the second connecting part (104) at intervals, so that the first rolling groove (2021) and the second rolling groove (1041) are surrounded to form a rolling track, and the plurality of balls (6) are rollingly arranged in the rolling track.

4. The clutch assembly for an electric power-assisted bicycle according to claim 3, characterized in that: The clutch assembly for the electric power-assisted bicycle further comprises a support frame (7), wherein the support frame (7) is provided with a plurality of support bodies (701) along the circumferential direction, and the plurality of support bodies (701) are clamped with the plurality of balls (6) in a one-to-one correspondence.

5. The clutch assembly for an electric power-assisted bicycle according to claim 4, characterized in that: The support body (701) is an open spherical arc-shaped semi-enclosed structure.

6. The clutch assembly for an electric power-assisted bicycle according to claim 2, characterized in that: The second output portion (103) and the second connecting portion (104) are integrally formed.

7. The clutch assembly for an electric power-assisted bicycle according to any one of claims 1 to 6, characterized in that: The elastic member (5) is in an S-shaped plate structure.

8. The clutch assembly for an electric power-assisted bicycle according to any one of claims 1 to 6, characterized in that: The support block (301) comprises a vertically connected clamping portion (3011) and a limiting portion (3012), a plurality of the clamping portions (3011) and a plurality of the positioning grooves (101) are arranged in a one-to-one correspondence, and the clamping portion (3011) is clamped in the positioning groove (101), and the elastic member (5) and the roller (4) are abutted between two adjacent limiting portions (3012).

9. The clutch assembly for an electric power-assisted bicycle according to claim 8, characterized in that: The limiting portion (3012) is provided with an extrusion groove (8) which is in an arc shape. The roller (4) abuts between the groove wall of the extrusion groove (8) and the elastic member (5), and the bottom end of the elastic member (5) is supported on the clamping portion (3011).

10. The clutch assembly for an electric power-assisted bicycle according to any one of claims 1 to 6, characterized in that: The retaining frame assembly (3) also includes a cover plate (9), the cover plate (9) is connected to the plurality of support blocks (301), the inner gear power ring (1) is provided with a mounting groove (105) along its circumference, the cover plate (9) is annular and is embedded in the mounting groove (105).

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