CN212667598U

CN212667598U - Rear chain shifter of bicycle

Info

Publication number: CN212667598U
Application number: CN202021568711.6U
Authority: CN
Inventors: 钱海泽; 麦玉泉
Original assignee: Guangdong Shunde Shuntai Intelligent Sports Equipment Co ltd
Current assignee: Guangdong Shunde Shuntai Intelligent Sports Equipment Co ltd
Priority date: 2020-08-01
Filing date: 2020-08-01
Publication date: 2021-03-09
Anticipated expiration: 2030-08-01

Abstract

The utility model discloses a derailleur is dialled to bicycle rear belongs to the bicycle derailleur field, include the base component, couple in the movable member of base component and the chain guide of being connected through rotation axis and movable member, the inside resistance part that is provided with of movable member, resistance part includes one-way clutch, hollow carousel and friction disc. The one-way clutch is fixed in the movable component, at least part of the rotary disc is sleeved in the inner connecting piece of the one-way clutch, and the rotary shaft penetrates through the inner hole of the rotary disc and the central hole of the friction plate. The rotating shaft is fixed with the friction plate in the circumferential direction, and the friction plate acts on the turntable. By adopting the bicycle rear derailleur, the chain can be prevented from falling off in the anticlockwise direction.

Description

Rear chain shifter of bicycle

Technical Field

The utility model relates to a chain ware field is dialled to the bicycle, more specifically relates to a chain ware is dialled to bicycle rear.

Background

With the improvement of living standard of people, people pay more and more attention to the health of the body, and more people exercise their bodies by participating in physical exercise. The bicycle is used as a sports event which is easy to enter a door and low in difficulty, and is popular among people. Thus making the bicycle industry brisk. In order to improve the user experience, bicycle manufacturers are constantly optimizing and improving the function and quality of bicycles.

Among them, a rear derailleur of a bicycle is an important part that shifts a chain of the bicycle through a chain guide. When the bicycle runs on a rugged and bumpy road section, the chain can swing up and down to a larger extent, and then the chain guide piece is pulled to swing anticlockwise, so that the phenomenon that the chain falls off occurs. In order to avoid this phenomenon, manufacturers have provided a member for preventing the chain guide from swinging counterclockwise, most of which increase the friction force by adding a friction member to prevent the chain guide from reversing. In prior designs, a resistance applying element is provided inside the movable member connected with the chain guide. The resistance applying elements include one-way roller clutches and friction members. The chain guide is applied with a resistance in the counterclockwise direction by the resistance applying member, thereby functioning as a drop-proof chain.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a bicycle rear derailleur with prevent falling chain function of new design.

In accordance with an embodiment of the present invention, a bicycle rear derailleur is provided that includes a base member adapted to be mounted on a bicycle frame, a movable member movably coupled to the base member, and a chain guide. The chain guide is connected to the movable member by a rotating shaft, and the chain guide rotates relative to the movable member about an axis of the rotating shaft. A resistance component is arranged in the movable component and comprises a one-way clutch, a hollow rotary disc and a friction plate. The one-way clutch is fixed in the movable component, at least part of the rotary disc is sleeved in an inner connecting piece of the one-way clutch, and the friction plate is attached to the upper portion of the rotary disc. The rotating shaft extends through an inner bore of a turntable and a center hole of the friction plate, the friction plate being circumferentially fixed with the rotating shaft, wherein the turntable rotates with an inner coupling member of the one-way clutch only in a predetermined direction.

In a preferred aspect of the invention, the one-way clutch comprises a one-way roller clutch having the inner coupling and the outer coupling, the inner coupling being arranged radially inside the outer coupling.

In a preferred embodiment of the present invention, the resistance component further includes one or more elastic members, and the one or more elastic members are disposed on the friction plate to provide pressure to the friction plate.

In the preferred embodiment of the present invention, the resistance component further includes a fixing nut, the fixing nut is screwed to the end of the rotating shaft, and the fixing nut abuts against the elastic member.

In the preferred embodiment of the present invention, the turntable includes a flange and a cylinder extending from the flange. The outer diameter of the cylinder is adapted to the inner diameter of the inner coupling of the one-way clutch. The rotating shaft passes through the inner hole of the cylinder. The friction plate is attached to the flange.

The utility model discloses in the technical scheme of preferred, be provided with on the rotation axis prevent for friction disc pivoted plane, be provided with on the global of the centre bore of friction disc with the corresponding straight flange in plane.

In the preferred embodiment of the present invention, the movable member has a recess formed therein, and the resistance member is disposed in the recess. A cover plate is fixed on the movable component and covers the resistance component in the groove.

According to the utility model discloses an embodiment still provides a bicycle rear derailleur, include: a base member, a movable member, and a chain guide. The base member is adapted to be mounted on a bicycle frame; the movable member is movably coupled to the base member; the chain guide is connected to the movable member by a rotating shaft, and the chain guide rotates relative to the movable member about an axis of the rotating shaft. A resistance component is disposed within the movable member. The resistance component comprises a one-way roller clutch, a rotary disc and a friction plate, wherein the one-way roller clutch is fixed in the movable component. The turntable comprises a hollow sleeve part which is arranged in an inner ring of the one-way roller clutch, wherein the outer diameter of the hollow sleeve part is matched with the diameter of the inner ring of the one-way roller clutch, and the friction plate is abutted against the upper part of the turntable. The rotating shaft extends through the hollow sleeve portion of the turntable and the inner bore of the friction plate, wherein the friction plate and the rotating shaft are arranged to be relatively non-rotatable axially.

In a preferred embodiment of the invention, the one-way roller clutch comprises an annular inner coupling member and an outer coupling member, the hollow sleeve part extending through a central bore of the inner coupling member such that the rotary plate rotates in a predetermined direction together with the inner coupling member of the one-way roller clutch and is non-rotatable in a direction opposite to the predetermined direction together with the one-way roller clutch.

In the preferred technical solution of the present invention, the resistance component further includes one or more belleville springs, and the one or more belleville springs are disposed on the friction plate and the rotation shaft (31) passes through the center holes of the one or more belleville springs. Optionally, the resistance component further includes a fixing nut, a thread is disposed at an end of the rotating shaft, the fixing nut is connected to the end of the rotating shaft in a threaded manner, and the fixing nut abuts against the belleville spring.

The utility model has the advantages that:

1. the utility model provides a bicycle rear derailleur with prevent falling chain function, rotation axis and friction disc circumference are fixed to the rotation axis passes through the carousel and is connected with one way clutch rotation, and the friction disc acts on the carousel, and the frictional force that produces between frictional force and the carousel directly passes to the rotation axis through the carousel, avoids the rotation axis atress not enough and can not prevent the chain guide piece reversal, improves the reliability of device;

2. the rear derailleur has a simple structure and a small number of parts, so that the volume of the rear derailleur is reduced, the attractiveness of the bicycle is improved, and the influence of the rear derailleur on a user in the riding process is reduced;

3. the friction disc adjusts the pressure of the friction disc on the rotating shaft to the rotating disc through axial movement, and then adjusts the friction force generated when the friction disc and the rotating disc rotate relatively, so that a user can conveniently adjust the friction force of the chain guide piece under different use scenes, and the adaptability of the rear derailleur is improved.

Drawings

FIG. 1 is a schematic structural view of a bicycle rear derailleur in accordance with an embodiment of the present invention;

FIG. 2 is a side elevational view of the bicycle rear derailleur in accordance with one embodiment of the present invention, with part I of the resistance member shown in perspective;

FIG. 3 is an enlarged view of portion I of FIG. 2;

FIG. 4 is a schematic structural view of a rotating shaft and friction plate in the bicycle rear derailleur in accordance with one embodiment of the present invention;

FIG. 5 is a schematic structural view of a turntable in the bicycle rear derailleur in accordance with one embodiment of the present invention;

FIG. 6 is a schematic structural view of a movable member in a bicycle rear derailleur in accordance with an embodiment of the present invention.

In the figure:

1. base member, 2, movable member, 3, chain guide, 21, one-way clutch, 22, rotary disc, 23, friction plate, 24, elastic element, 25, fixing nut, 26, cover plate, 27, groove, 221, flange plate, 222, cylinder, 231, straight edge, 31, rotary shaft, 311, plane.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

For the sake of clarity and to facilitate the reader's comprehension of the invention, the positional and orientational descriptions of various parts and components of the rear derailleur, such as one part above, below, left side and right side, etc., with reference to the manner of placement of the bicycle rear derailleur illustrated in fig. 1, are not intended to limit the scope of the claims herein. Those skilled in the art will appreciate that when the automatic rear derailleur according to the embodiments of the present invention is disposed in other orientations, the positional and orientational relationships between the parts will change accordingly.

As seen in fig. 1-3 and 6, the embodiment provides a bicycle rear derailleur with an anti-chain-drop function, comprising a base member 1, a movable member 2, a chain guide 3. The base member 1 is adapted to be mounted on a bicycle frame, the movable member 2 is movably coupled to the base member 1, and the chain guide 3 is connected to the movable member 2 through a rotation shaft 31. The chain guide 3 rotates about the axis of the rotating shaft 31 with respect to the movable member 2. The movable member 2 is internally provided with a resistance component.

The resistance elements include a one-way clutch 21, a hollow rotating disk 22, and a hollow friction plate 23. The one-way clutch 21 is fixed in the movable member 2. The rotary disk 22 is sleeve-connected in the inner coupling member of the one-way clutch 21 so as to be rotatable in one direction relative to the one-way clutch. A part of the rotating disk 22 is fitted in the inner coupling member of the one-way clutch 21. The turntable 22 is provided with a through hole passing therethrough up and down in the middle, and the rotary shaft 31 extends through the inner through hole of the turntable 22 and thus through the inner coupling member of the one-way clutch 21. The rotary shaft 31 is arranged to be freely rotatable in a predetermined direction with respect to the turntable 22.

In an embodiment of the present invention, the one-way clutch may be a one-way roller clutch. For example, a one-way roller clutch includes an inner coupling member, an outer coupling member disposed radially outward of the inner coupling member, and rollers or the like located between the inner coupling member and the outer coupling member. Those skilled in the art will appreciate that rollers may be replaced by rollers in embodiments that fall within the scope of a one-way roller clutch or its equivalent. Since a part of the rotating disk 22 is fittingly connected with the inner coupling member of the one-way clutch 21, the rotating disk 22 can rotate together with the inner coupling member of the one-way clutch in the clockwise direction. In the counterclockwise direction, the rotary plate 22 and the one-way clutch 21 cannot rotate integrally.

The friction plate 23 is disposed above the turntable 22 and attached to the turntable 22. The friction plate 23 is circumferentially fixed to the rotary shaft 31. In the present application, the term "circumferentially fixed" means that the friction plate 23 cannot rotate about the rotation axis, but can move up and down on the rotation axis. This connection enables the friction plates 23 to rotate together with the rotary shaft 31, and specifically, the rotary shaft 31 rotates the friction plates 23 by the torque transmitted from the chain guide 3. Since the friction plate 23 is attached to the turntable 22, a friction force is generated between the friction plate 23 and the turntable 22, and the rotation of the rotary shaft 31 in the turntable 22 is hindered by the friction plate 23.

In one embodiment, the upper portion of the rotating shaft 31 may be provided with a rotation preventing member, and when the rotating shaft 31 is coupled with the inner hole of the friction plate 23, the rotating shaft 31 cannot rotate with respect to the friction plate 23 but rotates in synchronization with the friction plate 23.

The chain of the bicycle is fitted to the chain guide 3, and when the bicycle travels on a bumpy road, the chain is largely swung, and the chain guide 3 is rotated about the rotation shaft 31 relative to the movable member 2 by the pulling of the chain. When the rotary shaft 31 rotates in the clockwise direction in the movable member 2, the rotary shaft 31 drives the friction plate 23 to rotate clockwise, the rotary shaft 31 rotates together with the inner coupling member of the one-way clutch 21 through the rotary plate 22, the outer coupling member of the one-way clutch 21 is fixed, and thus the rotary shaft 31 and the outer coupling member of the one-way clutch 21 rotate relatively. In this embodiment, the clockwise direction is the free rotation direction of the one-way clutch 21, so that the one-way clutch 21 does not generate a reaction force to the rotating disk 22 to prevent the rotating disk from rotating, and a large friction force is not generated between the rotating disk 22 and the friction plate 23 to prevent the rotation of the friction plate 23. The chain rotates clockwise, and the chain is taut, the phenomenon that the chain falls can not appear.

When the rotation shaft 31 rotates in the counterclockwise direction in the movable member 2, the direction is the direction in which the chain slacks. The rotating shaft 31 drives the friction plate 23 to rotate counterclockwise in the movable member 2, the friction plate 23 contacts with the rotating disc 22, the friction plate 23 rotates counterclockwise, and the rotating disc 22 is also driven to rotate counterclockwise. On the other hand, since the rotary plate 22 is connected to the one-way clutch 21 and the one-way clutch 21 is fixed in the movable member 2, the one-way clutch 21 is in the direction of locking thereof in the counterclockwise direction, and therefore the rotary plate 22 and the one-way clutch cannot rotate together and are also locked. Friction force is generated between the friction plate 23 and the turntable 22, so that the friction plate 23 cannot rotate, the friction plate 23 and the rotating shaft 31 are fixed in the circumferential direction, the friction plate 23 cannot rotate, and the rotating shaft 31 cannot rotate. In this way, the rotation of the rotary shaft 31 in the counterclockwise direction is restricted, and the rotation of the chain guide 3 and the chain is restricted, thereby preventing the chain from slackening and functioning as a chain drop prevention function.

Meanwhile, the pressure of the friction plate 23 on the rotating disc 22 can be adjusted by adjusting the position of the friction plate 23 on the axial direction of the rotating shaft 31, and the friction force between the friction plate 23 and the rotating disc 22 is changed, so that the chain has sufficient friction force to prevent the chain from falling when encountering different amplitudes.

The rotating shaft 31 and the friction plate 23 are circumferentially fixed, friction force is generated between the friction plate 23 and the rotating disc 22, the friction force is directly transmitted to the rotating shaft 31 to prevent anticlockwise rotation, and the friction plate 23 and the rotating disc 22 are large in contact area and high in efficiency, so that the anti-clockwise rotation anti-rotation friction device is more reliable. The utility model discloses rear derailleur simple structure, part are small in quantity, make rear derailleur's volume reduce, and the aesthetic property that both improved the bicycle has the influence that reduces the in-process rear derailleur of riding to the user.

In one embodiment of the present invention, the resistance element further comprises one or more elastic members 24, and the one or more elastic members 24 are disposed above the friction plate 23 to provide pressure to the friction plate 23. In alternative embodiments, the elastic member 24 may be configured as a belleville spring, but is not limited thereto. The elastic part 24 is stressed to generate deformation, deformation pressure is applied to the friction plate 23, the friction plate 23 is stressed, the pressure applied to the rotary table 22 is increased, accordingly, the friction force generated when the rotary table 22 and the friction plate 23 move relatively or have a relative movement trend is increased, the anti-reversion capability of the chain guide part 3 is enhanced, and the chain is prevented from falling off.

In an embodiment of the present invention, the resistance component further includes a fixing nut 25, the fixing nut 25 is screwed on the end of the rotating shaft 31, and the fixing nut 25 abuts against the elastic member 24. The end of the rotating shaft 31 is provided with a screw, and the fixing nut 25 is screwed to the rotating shaft 31. By rotating the fixing nut 25, the fixing nut 25 can press the elastic member 24 downward, thereby increasing the pressure of the friction plate 23 on the turntable 22 and increasing the friction force. The friction force is adjusted by adjusting the tightness of the fixing nut 25, so that the rear derailleur can adapt to different road conditions, and the practicability of the rear derailleur is improved.

In one embodiment of the present invention, as shown in fig. 5, the turntable 22 includes a flange 221 and a tubular cylinder 222 fixedly connected to the flange 221. The cylinder 222 is rotatably connected to the inside of the one-way clutch 21, the rotating shaft 31 passes through the inner hole of the cylinder 222, and the friction plate 23 is attached to the flange 221. At least a part of the cylinder 222 extends into the inner coupling of the one-way clutch 21, is located between the one-way clutch 21 and the rotary shaft 31, and transmits power when the rotary shaft 31 rotates to the one-way clutch 21. When the rotating shaft 31 rotates counterclockwise or tends to rotate counterclockwise, the one-way clutch 21 is locked, and the cylinder 222 transmits a locking force to the rotating shaft 31 to lock the rotating shaft 31. The flange 221 has a large area, so that the contact area between the turntable 22 and the friction plate 23 is enlarged, the possibility of slipping between the turntable 22 and the friction plate is reduced, and the reliability of the whole device is improved.

In one embodiment of the present invention, as shown in fig. 4, a flat surface 311 is provided on the outer circumferential surface of the rotating shaft 31 to prevent rotation relative to the friction plate 23, and a straight edge 231 corresponding to the flat surface 311 is provided on the circumferential surface of the inner hole (or the center hole) of the friction plate 23. In this embodiment, the rotating shaft 31 is cylindrical, the flat surface 311 may be at least disposed at the upper portion of the rotating shaft 31 at the outer circumferential surface of the friction plate, the two parallel flat surfaces 311 change the shape of the shaft, the friction plate 23 is inserted from the end of the rotating shaft 31, and the two straight edges 231 on the inner circumferential surface of the friction plate 23 are engaged with the flat surface 311, so that the friction plate 23 can be clamped on the rotating shaft 31 and cannot rotate axially. With such a snap-fit relationship, when the friction plate 23 receives a frictional force, a resistance is transmitted to the rotary shaft 31, and when the rotary shaft 31 is rotated by the movable member 2, the rotary shaft 31 can also rotate the friction plate 23. The friction plate 23, although not rotatable in the circumferential direction, can move in the axial direction, adjusting the pressure against the turntable 22.

In an embodiment of the present invention, the movable member 2 is provided with a groove 27, and the resistance component is disposed in the groove 27. Through recess 27, the resistance element can hide wherein deeply, avoids the resistance element lateral protrusion setting on movable member 2, has reduced rear derailleur's volume, has improved rear derailleur's pleasing to the eye degree, has also reduced rear derailleur to the influence of riding person. A cover plate 26 is fixed to the movable member 2, and the cover plate 26 covers the resistance member in the groove 27. When the resistance part needs to be adjusted, for example, when the pressure of the friction plate 23 on the rotary disc 22 is adjusted, the cover plate 26 is opened for adjustment, and after the adjustment is completed, the cover plate 26 is closed to seal the resistance part, so that the situation that sundries such as road surface broken stones are bounced into the movable component 2 to influence the resistance part in the riding process is avoided, and the reliability of the rear derailleur is improved.

In one embodiment, a bicycle rear derailleur is provided, comprising: a base member 1, a movable member 2 and a chain guide 3. The base member 1 is adapted to be mounted on a bicycle frame; the movable member 2 is movably coupled to the base member 1; the chain guide 3 is connected to the movable member 2 through a rotating shaft 31, and the chain guide 3 rotates relative to the movable member 2 about the axis of the rotating shaft 31. The movable member 2 is internally provided with a resistance component. The resistance means comprises a one-way roller clutch fixed within the movable member 2, a rotatable disc 22 and friction plates 23. The turntable 22 comprises a hollow sleeve portion which is arranged in the inner ring of the one-way roller clutch, wherein the outer diameter of the hollow sleeve portion is adapted to the diameter of the inner ring of the one-way roller clutch and the friction plates rest on the turntable 22. The rotary shaft 31 extends through the hollow sleeve portion of the turntable 22 and the inner bore of the friction plate 23, wherein the friction plate 23 and the rotary shaft 31 are arranged so as not to be relatively axially rotatable.

In one embodiment, the one-way roller clutch includes annular inner and outer couplings, with a hollow sleeve portion extending through a central bore of the inner coupling. The rotary disk 22 rotates together with the inner link of the one-way roller clutch in a predetermined direction and cannot rotate together with the one-way roller clutch in a direction opposite to the predetermined direction.

In one embodiment, the resistance member further comprises one or more belleville springs disposed over the friction plate 23 to provide pressure to the friction plate 23. The resistance component further comprises a fixing nut 25, a thread is arranged at the end of the rotating shaft 31, the fixing nut 25 is connected to the end of the rotating shaft 31 in a threaded mode, and the fixing nut 25 abuts against the belleville spring.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. A bicycle rear derailleur, comprising:

a base member (1), said base member (1) being adapted to be mounted on a bicycle frame;

a movable member (2), the movable member (2) being movably coupled to the base member (1);

a chain guide (3), the chain guide (3) being connected to the movable member (2) by a rotation shaft (31), the chain guide (3) being rotatable relative to the movable member (2) about the axis of the rotation shaft (31);

a resistance part is arranged in the movable component (2), the resistance part comprises a one-way clutch (21), a hollow rotary disc (22) and a friction plate (23), the one-way clutch (21) is fixed in the movable component (2), at least part of the rotary disc (22) is sleeved in an inner coupling piece of the one-way clutch (21), and the friction plate (23) is attached above the rotary disc (22);

the rotary shaft (31) extends through an inner bore of a rotary plate (22) and a center bore of the friction plate (23), the friction plate (23) being circumferentially fixed with the rotary shaft (31), wherein the rotary plate (22) rotates with an inner coupling member of the one-way clutch only in a predetermined direction.

2. The bicycle rear derailleur according to claim 1, wherein the one-way clutch (21) includes a one-way roller clutch having the inner coupling and an outer coupling, the inner coupling being disposed radially inward of the outer coupling.

3. The bicycle rear derailleur according to claim 1, wherein the resistance member further includes one or more resilient members (24), the one or more resilient members (24) being disposed on the friction plate (23) to provide pressure to the friction plate (23).

4. The bicycle rear derailleur according to claim 3, wherein the resistance member further includes a fixing nut (25), the fixing nut (25) being threadedly coupled to an end of the rotating shaft (31), and the fixing nut (25) abutting against the elastic member (24).

5. The bicycle rear derailleur according to claim 1, wherein the turntable (22) includes a flange (221) and a cylinder (222) extending from the flange (221), an outer diameter of the cylinder (222) being adapted to an inner diameter of an inner coupling member of the one-way clutch (21); the rotating shaft (31) passes through the inner hole of the cylinder (222); the friction plate (23) is attached to the flange (221).

6. The bicycle rear derailleur according to claim 1, wherein the rotating shaft (31) is provided with a flat surface (311) that prevents rotation relative to the friction plate (23), and a peripheral surface of a center hole of the friction plate (23) is provided with a straight edge (231) that corresponds to the flat surface (311).

7. The bicycle rear derailleur according to claim 1, wherein the movable member (2) is formed with a recess (27), the resistance element being disposed within the recess (27); and a cover plate (26) is fixed on the movable component (2), and the cover plate (26) covers the resistance component in the groove (27).

8. A bicycle rear derailleur, comprising:

a resistance part is arranged in the movable component (2), the resistance part comprises a one-way roller clutch (21), a rotary table (22) and a friction plate (23), and the one-way roller clutch (21) is fixed in the movable component (2);

the turntable (22) comprises a hollow sleeve portion which is arranged in the inner ring of the one-way roller clutch (21), wherein the outer diameter of the hollow sleeve portion is adapted to the diameter of the inner ring of the one-way roller clutch (21), and the friction plates (23) rest above the turntable (22);

the rotary shaft (31) extends through a hollow sleeve portion of the rotary disk (22) and through an inner bore of the friction plate (23), wherein the friction plate (23) and the rotary shaft (31) are arranged so as to be relatively non-rotatable axially.

9. The bicycle rear derailleur according to claim 8, wherein the one-way roller clutch (21) includes annular inner and outer coupling members, the hollow sleeve portion extending through a central aperture of the inner coupling member such that the dial (22) rotates with the inner coupling member of the one-way roller clutch (21) in a predetermined direction and is non-rotatable with the one-way roller clutch (21) in a direction opposite the predetermined direction.

10. The bicycle rear derailleur according to claim 8 or 9, wherein the resistance member further includes one or more belleville springs disposed on the friction plate (23) and the rotating shaft (31) passes through a center hole of the one or more belleville springs; and/or the presence of a gas in the gas,

the resistance component further comprises a fixing nut (25), threads are arranged at the end portion of the rotating shaft (31), the fixing nut (25) is connected to the end portion of the rotating shaft (31) in a threaded mode, and the fixing nut (25) abuts against the belleville spring.