Transmission member and hub arrangement

Abstract

The utility model provides transmission component and flower hub device, transmission component includes transmission seat, movable part and stop piece. Transmission seat is set in movable part's outer circumferential side. Movable part includes rotating seat and a plurality of movable components, a plurality of movable components are along the circumferential side interval setting of rotating seat. Stop piece is sleeved in rotating seat's circumferential side. A plurality of movable components are confined between stop piece and rotating seat. Transmission component is confined between stop piece and rotating seat through setting stop piece to movable component, and the constraint is formed to movable component, so that movable component can be confined between stop piece and rotating seat, is favorable to reducing movable component radial and axial vibration or movement, effectively reduced movable component easy to loosen, fall off situation, and then reduce the abnormal wear and tear between movable component and transmission seat, rotating seat, reduce maintenance frequency, improved the firmness of transmission component overall structure.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, specifically to transmission components and hub devices. Background Technology

[0002] In a bicycle drivetrain, the hub is the core component connecting the frame, wheels, and power transmission parts. Its performance directly affects the bicycle's riding stability, power transmission efficiency, and service life.

[0003] In the prior art, bicycle hub devices typically include a hub assembly, a freehub assembly, and a transmission component for power transmission. The transmission component usually consists of a drive seat, a swivel seat, and rolling elements. The drive seat is fixedly connected to the hub assembly, the swivel seat is fixedly connected to the freehub assembly, and the rolling elements are rolled between the drive seat and the swivel seat, forming a mating structure that can rotate relative to each other.

[0004] In actual riding, when the rider drives the freehub assembly to rotate in the first rotation direction (such as pedaling forward), the rolling elements can lock in place under the cooperation of the driveshaft and swivel joints, thus transmitting the torque of the freehub assembly to the hub assembly, causing the wheel to rotate synchronously and enabling the bicycle to move forward. However, in bicycle usage scenarios, it is common for the freehub assembly to rotate in a second rotation direction opposite to the first rotation direction (such as when the rider stops pedaling, when reversing, or when coasting downhill). In this case, the freehub assembly will spin freely relative to the hub assembly. In existing structures, the rolling elements lack effective restraint during this free spin, and under the relative motion, vibration, and centrifugal force between the driveshaft and swivel joints, the rolling elements are very prone to detachment or loosening.

[0005] The detachment or loosening of rolling elements can directly lead to transmission failure, rendering the bicycle unable to move normally. If detachment occurs during riding, it can also cause abnormal jamming between the freehub assembly and the hub assembly, creating a riding safety hazard. Furthermore, detached or loose rolling elements will accelerate wear on transmission components, generate abnormal noise, reduce the lifespan of the hub assembly, and increase the user's maintenance costs and frequency. Utility Model Content

[0006] The present invention provides a transmission component that can improve the technical problems in related technologies where rolling elements are prone to loosening or falling off, leading to increased wear and transmission failure.

[0007] Firstly, the transmission component provided in this application includes:

[0008] Transmission seat;

[0009] The movable part includes a transmission seat sleeved on the outer periphery of the movable part; the movable part includes a rotating seat and a plurality of movable components, the plurality of movable components being spaced apart along the periphery of the rotating seat;

[0010] A limiting member, which is sleeved around the circumference of the rotating seat;

[0011] Multiple of the movable components are defined between the limiting member and the rotating seat.

[0012] In one embodiment, the rotating seat is provided with a first limiting groove along the circumference of the rotating seat, the movable component is provided with a second limiting groove along the circumference of the rotating seat, and the limiting member is sleeved in the first limiting groove and the second limiting groove.

[0013] In one embodiment, the limiting member is a limiting ring, which is made of an elastic material.

[0014] In one embodiment, the rotating seat is provided with a ramp and a groove, the groove being located at one end of the ramp and extending circumferentially along the rotating seat;

[0015] Each of the moving components includes a rolling element and a sliding element. The rolling element is disposed on the ramp, and the sliding element includes a contact end and a connecting end that are separated from each other. The contact end contacts the rolling element, and the connecting end is slidably disposed in the groove and elastically connected to the rotating seat.

[0016] In one embodiment, the sliding body is provided with a first mounting groove, which extends from the connecting end toward the contact end, and the rotating seat is provided with a second mounting groove along the circumference of the rotating seat, which communicates with the sliding groove.

[0017] The movable component also includes an elastic element, one end of which is installed in the first assembly groove and the other end of which is installed in the second assembly groove.

[0018] In one embodiment, the rotating seat is provided with a plurality of protrusions, which are spaced apart circumferentially along the rotating seat; each protrusion includes a lug extending circumferentially along the rotating seat, and the lug is disposed opposite to the sliding body;

[0019] The protrusion also includes an outer side facing away from the sliding body, at least part of which is the roll ramp.

[0020] In one embodiment, the lug is provided with a first limiting groove on the side opposite to the sliding body, and the rolling body and the sliding body are each provided with a second limiting groove. The first limiting groove and the second limiting groove are aligned along the circumference of the rotating seat.

[0021] In one embodiment, the contact end of the slider is provided with a mating surface, which is adapted to the surface of the rolling element.

[0022] Secondly, the hub device provided in this application includes:

[0023] Tower base components;

[0024] Hub components; and

[0025] The transmission component is the transmission component described in the embodiments of this application. The rotating seat is fixedly connected to the base assembly, and the transmission seat is fixedly connected to the hub assembly.

[0026] In one embodiment, the transmission seat has at least two circumferential limiting protrusions at one end corresponding to the hub assembly;

[0027] The hub assembly has at least two circumferential limiting grooves at one end corresponding to the transmission seat, and the circumferential limiting protrusion is fitted into the circumferential limiting groove.

[0028] The beneficial effects of the embodiments of this utility model are as follows:

[0029] The transmission component provided in the embodiments of this utility model, by setting a limiting member to confine the movable component between the limiting member and the rotating seat, forms a constraint on the movable component, so that the movable component can be confined between the limiting member and the rotating seat, which helps to reduce the radial and axial vibration or movement of the movable component, effectively reduces the situation where the movable component is easy to loosen or fall off, thereby reducing abnormal wear between the movable component and the transmission seat and the rotating seat, reducing the number of maintenance, and improving the overall structural reliability of the transmission component. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the transmission component provided in an embodiment of this utility model;

[0032] Figure 2 This is an exploded view of the transmission component provided in an embodiment of this utility model;

[0033] Figure 3 This is an exploded view of the movable part provided in an embodiment of the present invention;

[0034] Figure 4This is a partial cross-sectional schematic diagram of the movable part provided in an embodiment of this utility model;

[0035] Figure 5 This is an exploded view of the hub device provided in an embodiment of this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Hub assembly; 1. Transmission components; 2. Hub assembly; 3. Freehub assembly;

[0038] 10. Transmission seat; 1101. Mounting space; 11. Circumferential limiting protrusion;

[0039] 20. Moving part; 21. Rotating seat; 2101. First limiting groove; 2102. Second assembly groove; 2103. Slide groove; 211. Rolling ramp; 212. Protrusion; 2121. Lug; 22. Moving component; 2201. Second limiting groove; 2202. First assembly groove; 221. Rolling element; 222. Sliding element; 2221. Contact end; 2222. Connecting end; 2223. Mating surface; 223. Elastic element;

[0040] 30. Limiting component; 41. Circumferential limiting groove. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0042] In a bicycle drivetrain, the hub is the core component connecting the frame, wheels, and power transmission parts. Its performance directly affects the bicycle's riding stability, power transmission efficiency, and service life.

[0043] In the prior art, bicycle hub devices typically include a hub assembly, a freehub assembly, and a transmission component for power transmission. The transmission component usually consists of a drive seat, a swivel seat, and rolling elements. The drive seat is fixedly connected to the hub assembly, the swivel seat is fixedly connected to the freehub assembly, and the rolling elements are rolled between the drive seat and the swivel seat, forming a mating structure that can rotate relative to each other.

[0044] In actual riding, when the rider drives the freehub assembly to rotate in the first rotation direction (such as pedaling forward), the rolling elements can lock in place under the cooperation of the driveshaft and swivel joints, thus transmitting the torque of the freehub assembly to the hub assembly, causing the wheel to rotate synchronously and enabling the bicycle to move forward. However, in bicycle usage scenarios, it is common for the freehub assembly to rotate in a second rotation direction opposite to the first rotation direction (such as when the rider stops pedaling, when reversing, or when coasting downhill). In this case, the freehub assembly will spin freely relative to the hub assembly. In existing structures, the rolling elements lack effective restraint during this free spin, and under the relative motion, vibration, and centrifugal force between the driveshaft and swivel joints, the rolling elements are very prone to detachment or loosening.

[0045] The detachment or loosening of rolling elements can directly lead to transmission failure, rendering the bicycle unable to move normally. If detachment occurs during riding, it can also cause abnormal jamming between the freehub assembly and the hub assembly, creating a riding safety hazard. Furthermore, detached or loose rolling elements will accelerate wear on transmission components, generate abnormal noise, reduce the lifespan of the hub assembly, and increase the user's maintenance costs and frequency.

[0046] The present invention provides a transmission component that can improve the technical problems in related technologies where rolling elements are prone to loosening or falling off, leading to increased wear and transmission failure.

[0047] like Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the transmission component provided in an embodiment of this utility model. Figure 2 This is an exploded view of the transmission component provided in an embodiment of this utility model.

[0048] The transmission component 1 provided in this application includes a transmission base 10, a movable part 20, and a limiting member 30.

[0049] The drive unit 10 is used to connect to the hub assembly of the hub device and output power to the bicycle wheel. The movable part 20 is used to connect to the freehub assembly of the hub device, and drives the drive unit 10 and the freehub assembly 3.

[0050] Both the transmission seat 10 and the movable part 20 are annular structures. The transmission seat 10 is sleeved on the outer periphery of the movable part 20. The movable part 20 may include a rotating seat 21 and a plurality of movable components 22, which are spaced apart along the periphery of the rotating seat 21.

[0051] The limiting member 30 has a ring structure. The limiting member 30 is sleeved on the periphery of the rotating seat 21, and multiple movable components 22 are limited between the limiting member 30 and the rotating seat 21. The movable components 22 can move along the circumference of the limiting member 30.

[0052] The transmission component 1 provided in the embodiment of this utility model, by setting a limiting member 30, confines the movable component 22 between the limiting member 30 and the rotating seat 21, thereby constraining the movable component 22. This helps to reduce radial and axial vibration or movement of the movable component 22, effectively reducing the possibility of the movable component 22 loosening or falling off, thereby reducing abnormal wear between the movable component 22 and the transmission seat 10 and the rotating seat 21, reducing maintenance frequency, and improving the overall structural reliability of the transmission component 1.

[0053] like Figure 2 In one embodiment, the rotating seat 21 is provided with a first limiting groove 2101 along the circumference of the rotating seat 21, the movable component 22 is provided with a second limiting groove 2201 along the circumference of the rotating seat 21, and the limiting member 30 is installed in the first limiting groove 2101 and the second limiting groove 2201.

[0054] Specifically, the rotating base 21 includes an outer peripheral side facing the transmission base 10. A plurality of first limiting grooves 2101 are provided circumferentially on the outer peripheral side of the rotating base 21, and a plurality of movable components 22 are mounted on the outer peripheral side of the rotating base 21 along the circumferential direction of the rotating base 21. Each movable component 22 is provided with a second limiting groove 2201 along the circumferential direction of the rotating base 21, and the first limiting grooves 2101 and the second limiting grooves 2201 are aligned with each other along the circumferential direction of the rotating base 21. Thus, the limiting member 30 can be fitted into the first limiting grooves 2101 and the second limiting grooves 2201.

[0055] like Figure 3 , Figure 3 This is an exploded view of the movable part provided in an embodiment of the present invention. The rotating seat 21 is provided with a ramp 211 and a groove 2103. The groove 2103 is located at one end of the ramp 211 and extends circumferentially along the rotating seat 21. Each movable component 22 may include a rolling element 221 and a sliding element 222. The rolling element 221 is disposed on the ramp 211. The sliding element 222 includes a contact end 2221 and a connecting end 2222, which are separated from each other. The contact end 2221 contacts the rolling element 221. The connecting end 2222 is slidably disposed in the groove 2103 and elastically connected to the rotating seat 21.

[0056] like Figure 4 , Figure 4 This is a partial cross-sectional schematic diagram of the movable part provided in an embodiment of the present invention. The rotating seat 21 may be provided with multiple ramps 211 corresponding to multiple rolling elements 221, and multiple grooves 2103 corresponding to multiple sliding elements 222. The ramps 211 are partially curved surfaces located on the outer side of the rotating seat 21. The ramps 211 are used to enclose with the transmission seat 10 to form a locking space 1101 capable of securing the rolling elements 221. This locking space 1101 communicates with the grooves 2103, and the locking space 1101 gradually increases in size from the end furthest from the groove 2103 towards the end closest to the groove 2103. Within the locking space 1101, the rolling elements 221 simultaneously contact the inner side of the transmission seat 10 and the ramps 211. This allows the rolling elements 221 to be locked between the transmission seat 10 and the ramps 211 when the bicycle is driven, thereby enabling torque to be transmitted from the rotating seat 21 to the transmission seat 10.

[0057] In one embodiment, each rolling element 221 may include one, two, or more needle rollers that contact the rolling ramp line. In embodiments including two or more needle rollers, the two or more needle rollers may be axially connected. It is understood that the rolling element 221 may also be a ball, and there may be one, two, or more balls. In embodiments including two or more balls, the two or more balls are radially connected. Compared to embodiments using balls as rolling elements 221, this embodiment uses needle rollers as rolling elements 221, which effectively reduces local stress when the needle rollers contact the rolling ramp 211 and the inner wall of the transmission seat 10, uniformly reduces radial wear of the rolling element 221, and reduces structural damage to the transmission seat 10 and the rotating seat 21, thereby improving the service life of the transmission component 1.

[0058] The contact end 2221 of the slider 222 keeps in contact with the rolling element 221, and the connecting end 2222 slides in the groove 2103 and is elastically connected to the rotating seat 21. This allows the slider 222 to keep the rolling element 221 in contact with the ramp 211 and the transmission seat 10 under the action of elastic force when the bicycle is not driven or when it is idling. When the bicycle needs to be driven, the rolling element 221 can be locked between the ramp 211 and the transmission seat 10, thereby transmitting torque.

[0059] The contact end 2221 of the sliding body 222 may be provided with a mating surface 2223, which is adapted to the surface of the rolling body 221. In this embodiment, by providing a mating surface 2223 adapted to the rolling body 221 at the contact end 2221, the contact area between the sliding body 222 and the rolling body 221 can be increased, thereby effectively reducing the phenomenon of axial misalignment of the rolling body 221 due to local contact.

[0060] In this embodiment, because the roller 211 is designed as a curved surface, the mounting space 1101 gradually increases in the direction of approaching the slide groove 2103. In addition, the sliding body 222 is elastically connected to the rotating seat 21 and always abuts against the rolling body 221. This allows the sliding body 222 to remain in contact with the inner side of the roller 211 and the transmission seat 10. The slide groove 2103 can effectively prevent the sliding body 222 from deviating under the action of external forces (including elastic force, vibration load, etc.), reduce vibration and noise, and improve the smoothness and reliability of the movement of the sliding body 222.

[0061] Please see Figure 3 and Figure 4 The sliding body 222 may be provided with a first assembly groove 2202, which extends from the connecting end 2222 toward the contact end 2221. The rotating seat 21 is provided with a second assembly groove 2102 extending circumferentially along the rotating seat 21, which is connected to the sliding groove 2103.

[0062] The active component 22 also includes an elastic element 223, one end of which is installed in the first assembly groove 2202 and the other end of which is installed in the second assembly groove 2102.

[0063] For example, the first mounting groove 2202 and the second mounting groove 2102 may be one, two, or more, and correspondingly, the elastic element 223 may be one, two, or more. The elastic element 223 may be a cylindrical spring, with one end of the cylindrical spring mounted in the first mounting groove 2202 and the other end of the cylindrical spring mounted in the second mounting groove 2102.

[0064] In this embodiment, by installing the elastic element 223 in the first mounting groove 2202 and the second mounting groove 2102 extending circumferentially along the rotating seat 21, the circumferential component of the elastic force can be increased and other components besides the circumferential force can be reduced, thereby improving the smoothness of the movement of the sliding body 222, reducing the wear of the sliding body 222, and reducing the occurrence of jamming of the sliding body 222.

[0065] Please see Figure 3 The rotating seat 21 may be provided with a plurality of protrusions 212, which are spaced apart circumferentially along the rotating seat 21. Each protrusion 212 may extend sequentially along the radial and circumferential directions of the rotating seat 21. The protrusion 212 includes a lug 2121 extending circumferentially, which is opposite to the sliding body 222 and can limit the radial movement of the sliding body 222 and reduce the radial vibration amplitude. The protrusion 212 also includes an outer side away from the sliding body 222, at least part of which forms a ramp 211, which cooperates with the inner side of the transmission seat 10 to secure the rolling body 221. Each movable component 22 is located between every two adjacent protrusions 212. In two adjacent protrusions 212, one protrusion 212 is used to define the sliding body 222, and the other protrusion 212 cooperates with the transmission seat 10 to secure the rolling body 221.

[0066] The lug 2121 has a first limiting groove 2101 on the outer side opposite to the sliding body 222. The rolling body 221 and the sliding body 222 may have a second limiting groove 2201. The first limiting groove 2101 and the second limiting groove 2201 are aligned along the circumference of the rotating seat 21. The limiting member 30 is made of elastic material and can be a limiting ring, which is sleeved on the first limiting groove 2101 and the second limiting groove 2201.

[0067] This invention utilizes a limiting ring made of elastic material. When the rolling element 221 moves into the narrow space between the limiting member 30 and the ramp 211, the limiting ring undergoes elastic deformation with radial expansion. This deformation generates a restoring force that drives the rolling element 221 towards the protrusion 212. This design effectively reduces the likelihood of the rolling element 221 getting stuck in the narrow space between the limiting member 30 and the rotating seat 21. Furthermore, by limiting the rolling element 221 and the sliding element 222, the limiting ring absorbs the vibration of the needle rollers and the sliding element 222, ensuring stable assembly of them onto the transmission seat 10. This reduces axial movement or deviation of the rolling element 221, minimizes wear or jamming, and reduces the likelihood of the rolling element 221 and the sliding element 222 dislodging under extreme conditions such as high-speed idling. In addition, the first limiting groove 2101 of the lug 2121 and the second limiting groove 2201 of the rolling body 221 and the sliding body 222 can also form a space for storing lubricating medium (such as lubricating oil, lubricating grease, etc.), which is conducive to heat dissipation from frictional contact and reduces wear.

[0068] like Figure 5 , Figure 5 This is an exploded view of the hub device provided in an embodiment of this utility model. The hub device 100 may include a transmission component 1, a freehub assembly 2, and a hub assembly 3. The transmission component 1 is the transmission component 1 of this application. A rotating seat 21 is fixedly connected to the freehub assembly 2, and a transmission seat 10 is fixedly connected to the hub assembly 3. The transmission component 1 is disposed between the freehub assembly 2 and the hub assembly 3, providing a transmission connection between the freehub assembly 3 and the hub assembly 2. The freehub assembly 2 is used for inputting power. The hub assembly 3 is used for outputting power.

[0069] The drive base 10 has at least two circumferential limiting protrusions 11 at one end corresponding to the hub assembly 2. In some embodiments, the at least two circumferential limiting protrusions 11 can be set at equal intervals along the circumference of the drive base 10. The hub assembly 3 has at least two circumferential limiting grooves 41 at one end corresponding to the drive base 10, and the circumferential limiting protrusions 11 are fitted into the circumferential limiting grooves 41. This design enables effective transmission of driving torque from the freehub base assembly 2 to the hub assembly 3.

[0070] The embodiments of this utility model design a circumferential limiting protrusion 11 in the transmission seat 10 and a circumferential limiting groove 41 in the hub assembly 3. The transmission seat 10 and the hub assembly 3 cooperate through the circumferential limiting protrusion 11 and the circumferential limiting groove 41. This design can transmit greater torque, reduce slippage, and improve torque transmission efficiency.

[0071] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A transmission component, characterized in that, include: Transmission seat; The movable part includes a transmission seat sleeved on the outer periphery of the movable part; the movable part includes a rotating seat and a plurality of movable components, the plurality of movable components being spaced apart along the periphery of the rotating seat; A limiting member, which is sleeved around the circumference of the rotating seat; Multiple of the movable components are defined between the limiting member and the rotating seat.

2. The transmission component according to claim 1, characterized in that, The rotating seat is provided with a first limiting groove along the circumference of the rotating seat, and the movable component is provided with a second limiting groove along the circumference of the rotating seat. The limiting member is sleeved in the first limiting groove and the second limiting groove.

3. The transmission component according to claim 1, characterized in that, The limiting component is a limiting ring, which is made of elastic material.

4. The transmission component according to claim 1, characterized in that, The rotating seat is provided with a ramp and a chute, the chute being located at one end of the ramp and extending along the circumference of the rotating seat; Each of the moving components includes a rolling element and a sliding element. The rolling element is disposed on the ramp, and the sliding element includes a contact end and a connecting end that are separated from each other. The contact end contacts the rolling element, and the connecting end is slidably disposed in the groove and elastically connected to the rotating seat.

5. The transmission component according to claim 4, characterized in that, The sliding body is provided with a first mounting groove, which extends from the connecting end toward the contact end. The rotating seat is provided with a second mounting groove that extends circumferentially along the rotating seat and communicates with the sliding groove. The movable component also includes an elastic element, one end of which is installed in the first assembly groove and the other end of which is installed in the second assembly groove.

6. The transmission component according to claim 4 or 5, characterized in that, The rotating base is provided with a plurality of protrusions, which are spaced apart along the circumference of the rotating base; each protrusion includes a lug extending along the circumference of the rotating base, and the lug is disposed opposite to the sliding body. The protrusion also includes an outer side facing away from the sliding body, at least part of which is the roll ramp.

7. The transmission component according to claim 6, characterized in that, The lug is provided with a first limiting groove on the side opposite to the sliding body, and the rolling body and the sliding body are each provided with a second limiting groove. The first limiting groove and the second limiting groove are aligned along the circumference of the rotating seat.

8. The transmission component according to claim 4 or 5, characterized in that, The contact end of the sliding body is provided with a mating surface, which is adapted to the surface of the rolling body.

9. A hub device, characterized in that, include: Tower base components; Hub components; as well as A transmission component, wherein the transmission component is the transmission component according to any one of claims 1-8, wherein the rotating seat is fixedly connected to the base assembly, and the transmission seat is fixedly connected to the hub assembly.

10. The hub device according to claim 9, characterized in that, The transmission seat is provided with at least two circumferential limiting protrusions at one end corresponding to the hub assembly; The hub assembly has at least two circumferential limiting grooves at one end corresponding to the transmission seat, and the circumferential limiting protrusion is fitted into the circumferential limiting groove.

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