CN217754016U - Damping type rear derailleur and bicycle - Google Patents

Abstract

The embodiment of the utility model discloses a damped rear derailleur and a bicycle. The damped rear derailleur includes a base member, an actuating member, a movable member, and a chain guide member, and the movable member includes a one-way bearing, a P The joint seat and the main shaft, the one-way bearing includes the mandrel, the rolling element and the external components connected in sequence from the inside to the outside; the main shaft is fixedly connected with one end of the chain guide member, and is fixedly connected with the external component after passing through the P joint seat wherein, when the main shaft rotates in the first direction, the rolling element does not generate friction with the mandrel, and when the main shaft rotates in the second direction, the rolling element and the mandrel generate friction. The embodiment of the utility model achieves the purpose of unidirectional damping of the rear derailleur, so that the chain does not produce undesired slack, and greatly improves the practicability and applicability of the rear derailleur.

Description

A damping type rear derailleur and bicycle

technical field

The utility model relates to the field of bicycle speed change devices, in particular to a damping rear derailleur and a bicycle.

Background technique

At present, the rear derailleur, referred to as the rear derailleur, is an important part of the transmission system on variable speed bicycles such as mountain bikes and road bikes. Use your body to propel the bike forward.

However, when the bicycle is riding, for example, in bumpy road conditions, the inertia of bumps and vibrations will cause the chain guide member and the connecting seat to rotate accordingly, thereby causing the chain to slack, causing the chain to fall off, resulting in the practicability of the rear derailleur. poor.

Utility model content

The purpose of the utility model is to provide a damping type rear derailleur and a bicycle, aiming at solving the problem of poor practicability of the existing rear derailleur.

In order to solve the above technical problems, the purpose of this utility model is achieved through the following technical solutions: provide a damping rear derailleur, comprising:

A base member, an actuating member, a movable member, and a chain guide member. One end of the actuating member is rotatably arranged on the base member, and one end is rotatably arranged on the movable member. The rotatable The moving member is rotatably arranged at one end of the chain guide member;

The movable member includes a one-way bearing, a P-joint seat and a main shaft, and the one-way bearing includes a mandrel, a rolling element and an external assembly sequentially connected from inside to outside;

The main shaft is fixedly connected to one end of the chain guide member, and is fixedly connected to the external component after passing through the P joint seat;

Wherein, when the main shaft rotates in the first direction, the rolling element does not generate friction force with the mandrel, and when the main shaft rotates in the second direction, the rolling element generates friction force with the mandrel.

Further, the P-joint seat is provided with a first mounting groove, and a mounting seat is fixed in the first mounting groove, and the mandrel is connected to the mounting seat;

The free end of the main shaft passes through the P-joint seat and extends into the first installation groove, wherein the external component is fixed on the free end of the main shaft.

Further, it also includes a controllable member arranged on the installation seat, and the controllable member is used to control the relative rotation or fixation of the mandrel and the P-joint seat.

Further, the controllable components include:

a ratchet, the ratchet is coaxially fixed on the mandrel;

a pawl, the pawl is rotatably connected to the mounting seat;

A control member, the control member is arranged on the installation base and connected with the ratchet, and is used for controlling the connection between the ratchet and the ratchet or controlling the connection between the ratchet and the ratchet.

Further, the inner wall of the first installation groove is sequentially provided with a first limiting groove and a second limiting groove, and the control member includes:

A switch shaft, the switch shaft is rotatably connected in the first installation groove, and the pawl is coaxially arranged on the switch shaft;

a pulling piece, the pulling piece is coaxially fixed on the switch shaft;

Wherein, when the pulling piece is at least partially embedded in the first limiting groove, the free end of the pawl is embedded in one of the tooth grooves of the ratchet, and when the pulling piece is at least partially embedded in the second When in the limit slot, the free end of the ratchet is disengaged from the tooth groove of the ratchet.

Further, the switch shaft includes a connected first cylindrical portion and a second cylindrical portion with a notch outside, and the ratchet is sleeved on the first cylindrical portion;

The pulling piece includes a sleeve part, a connection part and an abutment part connected in sequence, the connection part is sleeved on the second cylindrical part, and one end of the connection part is connected to one side and the other end of the sleeve part An included angle is formed with the abutment portion, wherein the connection between the connection portion and the abutment portion is used to embed the first limiting groove or the second limiting groove;

The pawl is provided with a flange for abutting against one end of the connecting part;

The control member also includes an elastic reset member disposed on the mounting seat and used to drive the pawl to embed into the tooth groove of the ratchet.

Further, the elastic reset member is a first torsion spring sheathed on the switch shaft, one end of the first torsion spring is fixed on the mounting seat, and the other end is in contact with the flange and deviates from the abutment side of the department.

Further, the outer circumferential array of the mandrel has a plurality of teeth, and the controllable member includes:

an engaging piece, the engaging piece is rotatably arranged on the mounting base, and the engaging piece is provided with an engaging groove for cooperating with the teeth;

A positioning assembly, the positioning assembly is arranged on the movable member, and the positioning assembly is used to limit the position of the engaging piece after the mandrel is engaged with the engaging piece.

Further, the positioning component includes:

a rotating shaft, the rotating shaft is rotatably connected to the mounting seat;

a cam, the cam is fixed on the shaft;

A limit shaft, the limit shaft is fixed on the mounting base;

The second torsion spring, the second torsion spring is sleeved on the limit shaft, and one extension end of the second torsion spring is fixed on the movable member, and the other extension end is pressed against the The outer side of the engaging piece is used to drive an extension end of the engaging piece to always press against the side of the cam.

The embodiment of the utility model also provides a bicycle, which includes a bicycle body and the above-mentioned damping rear derailleur, and the damping rear derailleur is installed on the bicycle body.

Embodiments of the utility model provide a damping rear derailleur and a bicycle, wherein: the damping rear derailleur includes a base member, an actuating member, a movable member, and a chain guide member, and one end of the actuating member is rotatably arranged on the base member, and one end is rotatably arranged on the movable member, and the movable member is rotatably arranged at one end of the chain guide member, wherein the movable member It includes a one-way bearing, a P-joint seat and a main shaft. The one-way bearing includes a mandrel, a rolling element and an outer assembly connected sequentially from inside to outside; the main shaft is fixedly connected to one end of the chain guide member, and After passing through the P joint seat, it is fixedly connected with the external component; wherein, when the main shaft rotates in the first direction, the rolling element does not generate friction with the mandrel, and the main shaft rotates in the second direction When rotating, the rolling element generates frictional force with the mandrel. The embodiment of the utility model realizes the purpose of one-way damping of the rear derailleur, so that the chain does not produce undesired slack, and greatly improves the practicability and applicability of the rear derailleur.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are some embodiments of the utility model. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is a structural schematic diagram of the damping rear derailleur provided by Embodiment 1 of the present invention under a first viewing angle;

Fig. 2 is a structural schematic diagram of the damping rear derailleur provided by Embodiment 1 of the present invention under a second viewing angle;

Fig. 3 is a partial exploded view of the damping rear derailleur provided by Embodiment 1 of the present invention;

Fig. 4 is a partial structural schematic diagram of the damping rear derailleur provided by Embodiment 1 of the present invention;

Fig. 5 is a partial sectional view of the damping rear derailleur provided by Embodiment 1 of the present utility model;

Fig. 6 is a partial exploded view of the damping rear derailleur provided by the second embodiment of the present invention.

Instructions for identification in the figure:

1. Base member; 11. Actuating member; 12. Movable member; 13. Chain guide member; 131. First chain plate; 132. Second chain plate; 133. Guide wheel; 134. Tensioning wheel; 14 , gasket; 15, avoidance groove; 16, return spring; 2, one-way bearing; 21, mandrel; 22, rolling element; 23, external component; 3, P joint seat; 32, first installation groove; 33, 34, the second limiting groove; 35, the third limiting groove; 36, the second installation groove; 37, the first inclined surface; 38, the second inclined surface; 4, the main shaft; 5, the ratchet ; 51, pawl; 52, control member; 53, switch shaft; 54, pulling piece; 55, tooth groove; 56, third inclined surface; 6, first cylindrical part; 61, second cylindrical part; Setting part; 63, connecting part; 64, abutting part; 65, flange; 7, first torsion spring; 93, the second torsion spring; 10, the mounting base; 101, the P joint cover; 102, the first rotating handle; 103, the second rotating handle; 104, the limiting ring.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. . Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and/or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and/or collections thereof.

It should also be understood that the terminology used in the description of the present invention is only for the purpose of describing specific embodiments and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural referents unless the context clearly dictates otherwise.

It should also be further understood that the term "and/or" used in the description of the utility model and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combination.

Embodiment one:

With reference to Figures 1 to 5, an embodiment of the present invention provides a damping rear derailleur, including:

Base member 1, actuating member 11, movable member 12, chain guide member 13, one end of said actuating member 11 is rotatably arranged on said base member 1, and one end is rotatably arranged on said movable member. On the member 12, the movable member 12 is rotatably arranged at one end of the chain guide member 13;

Wherein, the movable member 12 includes a one-way bearing 2, a P-joint seat 3 and a main shaft 4, and the one-way bearing 2 includes a mandrel (21), a rolling element 22 and an outer assembly 23 connected sequentially from inside to outside ;

The main shaft 4 is fixedly connected to one end of the chain guide member 13, and is fixedly connected to the external component 23 after passing through the P joint seat 3;

Wherein, when the main shaft 4 rotates in the first direction, the rolling member 22 does not generate friction with the mandrel 21, and when the main shaft 4 rotates in the second direction, the rolling member 22 and the mandrel 21 produces friction.

With reference to Fig. 1 and Fig. 2, in this embodiment, it should be noted that this application mainly improves the damping member, while the base member 1, the actuating member 11, the movable member 12 and the chain guide member 13 all adopt The existing solutions of the related art will not be elaborated in this application.

1 and 2, specifically, the chain guide member 13 includes a first chain plate 131, a second chain plate 132, a guide wheel 133 and a tension wheel 134, wherein the guide wheel 133 is rotatably mounted on the second chain plate in a bolted manner. Between the first chain plate 131 and the second chain plate 132, and at one end of the two chain plates, the tensioning wheel 134 is rotatably installed between the first chain plate 131 and the second chain plate 132 by bolting, and is located at The other ends of the two chain plates, wherein the main shaft 4 is fixed on one end of the first chain plate 131 by bolts.

In this embodiment, the outer assembly 23 is an outer ring, and the rolling elements 22 include but are not limited to needle rollers or balls. Since the main shaft 4 and the P-joint seat 3 are rotationally connected, and the main shaft 4 and the outer ring assembly 23 are fixedly connected, so When the movable member 12 and the first chain plate 131 rotate relative to each other, the P joint seat 3 will rotate relative to the one-way bearing 2. At this time, based on the one-way damping function of the one-way bearing 2 itself, the main shaft 4 will move along the first When rotating in one direction (for example clockwise), the rolling member 22 does not generate friction with the mandrel 21, and when the main shaft 4 rotates in a second direction (for example counterclockwise), the rolling member 22 and the The mandrel 21 generates friction.

In the application scenario of bicycle riding, when the bicycle in the related art is riding on rough terrain, bumps and vibrations can cause the chain guide member 13 to rotate counterclockwise, thereby causing undesired slack in the chain, while the rear derailleur of the present application The chain has the function of one-way damping. Specifically, when the main shaft 4 rotates clockwise, the rolling element 22 does not generate friction with the mandrel 21. When the main shaft 4 rotates counterclockwise, for example, the rolling element 22 and the mandrel 21 Friction is generated, that is to say, when the main shaft 4 rotates in the clockwise direction, the one-way bearing 2 will not hinder the rotation between the P joint seat 3 and the main shaft 4, and when the main shaft 4 rotates in the counterclockwise direction, the one-way bearing 2 It will hinder the rotation between the P joint seat 3 and the main shaft 4, so that the chain guide member 13 cannot rotate counterclockwise, that is, the chain will not produce undesired slack.

With reference to Fig. 3, Fig. 4 and Fig. 5, in a specific embodiment,

The P joint seat 3 is provided with a first installation groove 32, and the installation seat 10 is fixed in the first installation groove 32, and the mandrel 21 is connected with the installation seat 10;

The free end of the main shaft 4 passes through the P-joint seat 3 and extends into the first installation groove 32 , wherein the external component 23 is fixed on the free end of the main shaft 4 .

In this embodiment, the P-joint seat 3 is rotatably connected to the actuating member 11 and to the first link plate 131. Specifically, a gasket 14 is provided between the P-joint seat 3 and the first link plate 131. The sheet 14 is fixedly connected with the first chain plate 131, and one end of the P joint seat 3 close to the first chain plate 131 is provided with an avoidance groove 15, and a return spring 16 is arranged in the avoidance groove 15, and one end of the return spring 16 is fixed at the end of the avoidance groove 15. The bottom of the groove and the other end are fixed on the gasket 14 for resetting the P-joint seat 3 after the P-joint seat 3 rotates to a preset position.

In this embodiment, the P-joint seat 3 is provided with a second installation groove 36 communicating with the first installation groove 32, and the main shaft 4 passes through the second installation groove 36 and extends into the first installation groove 32 to realize the connection with the external assembly 23 When the chain guide member 13, the first chain plate 131, the main shaft 4 and the outer assembly 23 rotate in the first direction at the same time, the rolling element 22 does not generate friction with the mandrel 21, that is, the mandrel 21 and the P joint seat 3 There is no frictional contact, and when the chain guide member 13, the first chain plate 131, the main shaft 4 and the outer assembly 23 rotate in the second direction, the rolling element 22 and the mandrel 21 generate friction, that is, the mandrel 21 and the P joint seat 3 are The frictional contact, in turn, prevents the chain guide member 13 from rotating in an unintended direction.

Referring to Fig. 3, Fig. 4 and Fig. 5, in a specific embodiment, the damping rear derailleur of the present application further includes a controllable member arranged on the mounting seat 10, and the controllable member is used to control the The mandrel 21 is relatively rotatable or fixed to the P-joint seat 3 .

In this embodiment, in order to improve the applicability of the rear derailleur of the present application, in this embodiment, a controllable component that controls the spindle 21 is also provided. For the convenience of description, the mode corresponding to the controllable component is named The specific application scenarios of the bumpy mode are as follows. The riding user can choose to use the controllable member to control the relative fixation of the spindle 21 and the mounting seat 10 in bumpy road conditions, so that the chain guide member 13 is moving toward the first When rotating in one direction, the one-way bearing 2 does not produce a one-way damping effect, and when the chain guide member 13 rotates in the second direction, a one-way damping effect is generated to the bearing 2; and the specific application scenarios of the smooth mode are as follows, the riding user can In smooth road conditions, the chain guide member 13 is used to control the relative rotation of the mandrel 21 and the one-way bearing 2, that is, no matter whether the chain guide member 13 rotates in the first direction or in the second direction, the one-way bearing 2 does not produce a one-way damping effect , through the above-mentioned selection of the mode of the control member 5, the riding comfort of the riding user can be effectively improved. limited.

With reference to Figure 3, Figure 4 and Figure 5, in a specific embodiment, the controllable components include:

A ratchet 5, the ratchet 5 is coaxially fixed on the mandrel 21;

A pawl 51, the pawl 51 is rotatably connected to the mounting seat 10;

A control member 52, the control member 52 is arranged on the mounting seat 10 and connected with the pawl 51, for controlling the connection between the pawl 51 and the ratchet 5 or controlling the pawl 51 not to be connected to the ratchet 51 The ratchet 5 is connected.

In this embodiment, the mounting seat 10 can be connected to the P-joint seat 3 in a bolted manner, and the mounting seat 10 is located between the ratchet 5 and the one-way bearing 2, wherein the mandrel 21 is rotatably connected to the mounting seat 10. In this embodiment In the embodiment, the ratchet 5 can be fixed to the mandrel 21 through a keyed connection. In actual use, the user controls the ratchet 51 to connect with the ratchet 5 through the control member 52, that is, inserts the free end of the ratchet 51 into one of the ratchets 5 In the tooth groove 55, the ratchet 51 and the mandrel 21 can no longer rotate, that is, the mandrel 21 is fixed relative to the P joint seat 3, and the rear derailleur enters the smooth mode at this time; or the free end of the ratchet 51 is removed from the ratchet 5 One of the tooth slots 55 is pulled out, so that the ratchet 5 and the mandrel 21 can rotate simultaneously, that is, the mandrel 21 rotates relative to the P joint seat 3, and the rear derailleur enters the jolting mode at this time.

In a specific embodiment, the inner wall of the first installation groove 32 is sequentially provided with a first limiting groove 33 , a second limiting groove 34 and a third limiting groove 35 , and the control member 52 includes:

A switch shaft 53, the switch shaft 53 is rotatably connected in the first installation groove 32, and the pawl 51 is coaxially arranged on the switch shaft 53;

The puller 54 is coaxially fixed on the switch shaft 53;

Wherein, when the pulling piece 54 is at least partially embedded in the first limiting groove 33 , the free end of the pawl 51 disengages from the tooth groove 55 of the ratchet 5 and enters the third limiting groove 35 When the pulling piece 54 is at least partially inserted into the second limiting groove 34 , the free end of the pawl 51 is inserted into one of the tooth slots 55 of the ratchet 5 .

In this embodiment, the first limiting groove 33 and the second limiting groove 34 are arranged at intervals, wherein the rotation of the pulling piece 54 is controlled by the switch shaft 53, and when the rear derailleur needs to enter the smooth mode, the rotation of the switch shaft 53 , drive the ratchet 51 to rotate, and make the free end of the ratchet 51 embed in one of the tooth grooves 55 of the ratchet 5, and due to the existence of the second limiting groove 34, the pulling piece 54 will be embedded in the second limiting groove 34 and Only when the switch shaft 53 is subjected to an external force, for example, when the user applies an opposite force to the switch shaft 53 to make the free end of the ratchet 51 rotate in a direction away from the tooth groove 55, the pulling piece 54 will be released from the second limit groove. 34, it can be known that the first limit groove 33 is used to limit the pulling piece 54 after the pawl 51 is away from the tooth groove 55, and the third limit groove 35 is used to move the ratchet 51 away from the tooth groove 55. Finally, the ratchet 51 is limited, that is to say, the first limit groove 33, the second limit groove 34 and the third limit groove 35 can be used in conjunction with the pulling piece 54 to reduce the undesired generation of the switch shaft 53. Turn, and then achieve the desired smooth mode or bumpy mode for the rear derailleur.

It should be understood that during manufacture, according to actual needs, the third limiting groove 35 may not be needed, because the pulling piece 54 is limited by the first limiting groove 33, so that the switch shaft 53 is not affected by external force. It will not rotate, so that the ratchet 51 will not rotate undesirably with the mounting base 10. Through the cooperation of the first limiting groove 33 and the third limiting groove 35, the control member 52 and the mounting base can be improved. Limit stability between 10.

Referring to Fig. 3, Fig. 4 and Fig. 5, in a specific embodiment, the switch shaft 53 includes a connected first cylindrical portion 6 and a second cylindrical portion 61 with a notch on the outside, and the ratchet 5 is sleeved on the on the first cylindrical part 6;

The pulling piece 54 includes a sleeve portion 62, a connecting portion 63 and an abutting portion 64 which are sequentially connected. The connecting portion 63 is sleeved on the second cylindrical portion 61, and one end of the connecting portion 63 is connected to the sleeve. One side and the other end of the setting portion 62 form an included angle with the abutment portion 64, wherein the connection between the connection portion 63 and the abutment portion 64 is used to fit into the first limiting groove 33 or the second limiting groove. slot 34;

The pawl 51 is provided with a flange 65 for abutting against one end of the connecting portion 63;

The control member 52 also includes an elastic reset member disposed on the mounting base 10 and used to drive the pawl 51 to insert into the tooth groove 55 of the ratchet 5 .

In this embodiment, the switch shaft 53 is rotatably connected to the mounting base 10, wherein one end of the switch shaft 53 is provided with a first rotating handle 102 to facilitate the rotation of the switch shaft 53, and the other end of the switch shaft 53 is sleeved and fixed with a limit ring. 104 , the limit ring 104 interferes with the end of the mounting base 10 away from the first rotary handle 102 , so as to separate the limit switch shaft 53 from the mounting base 10 .

It should be noted that the P-joint seat 3 of the present application is also provided with a P-joint cover 101 for sealing the notch of the first installation groove 32, and the P-joint cover 101 can be detachably connected to the P-joint seat 3 by bolting , so as to prevent dust and protect the structure in the first installation groove 32 , wherein the switch shaft 53 passes through the P-joint cover 101 and is fixedly connected with the first rotary handle 102 .

Since the pulling piece 54 rotates coaxially with the switch shaft 53, in order to facilitate the insertion of the pulling piece 54 into the first limiting groove 33 or the second limiting groove 34, and to facilitate the insertion of the free end of the ratchet 51 into the third limiting groove 35 , the structures of the first limiting groove 33, the second limiting groove 34 and the second limiting groove 34 of the present application are consistent, wherein the second limiting groove 34 includes a connected first inclined surface 37 and a second inclined surface 38, the first inclined surface 37 and the second inclined surface 38 are extended in the direction away from each other, through such a design, the connection between the connecting portion 63 and the abutting portion 64 can be better locked in the first limiting groove 33 or in the second limiting groove 34, and one side of the connecting portion 63 can be against the first inclined surface 37 of the first limiting groove 33 or the second limiting groove 34, and one side of the abutting portion 64 can be against Close to the second inclined surface 38 of the first limiting groove 33 or the second limiting groove 34, that is, to increase the contact area between the pulling piece 54 and the first limiting groove 33 or the second limiting groove 34, thereby improving the first limiting groove 33 or the second limiting groove 34. The limiting groove 33 and the second limiting groove 34 are stable to the limiting of the pulling piece 54. At the same time, it should be noted that the free end side of the ratchet 51 is also provided with the third limiting groove 35. An inclined surface 37 interferes with the third inclined surface 56 .

Referring to Fig. 3, Fig. 4 and Fig. 5, specifically, the sleeve part 62, the connecting part 63 and the abutting part 64 are integrally formed to improve the structural stability of the pulling piece 54, wherein the connecting part 63 and the abutting part 64 The included angle is 90 degrees.

In this embodiment, in order to reduce manual operations and improve the convenience of use of the rear derailleur, an elastic reset member is provided on the mounting base 10. After disengagement, the ratchet 51 is automatically driven to be embedded in one of the tooth grooves 55 of the ratchet 5, and the second is used to press one side of the abutting portion 64 against the first limiting groove 33 or the second limiting groove 34. on the inclined surface 38 to improve the connection stability between the pulling piece 54 and the mounting base 10 .

In a specific embodiment, the elastic return member is a first torsion spring 7 sleeved on the switch shaft 53, one end of the first torsion spring 7 is fixed on the mounting base 10, and the other end is in contact with the The side of the flange 65 is away from the abutting portion 64 .

In this embodiment, the rotating end of the ratchet 51 used to connect with the switch shaft 53 is provided with a flange 65, and the two sides of the flange 65 are respectively used to resist the sleeve part 62 and the first torsion spring 7, specifically, the first Both the torsion spring 7 and the ratchet 51 are sheathed on the switch shaft 53, wherein the rotating end of the ratchet 51 is located above the coil of the first torsion spring 7, and the two ends of the first torsion spring 7 deviate from the mounting seat 10 by a limit respectively. One side of the bit ring 104 is connected to the side of the flange 65 away from the contact portion 64. It should be noted that when the first torsion spring 7 is installed, the first torsion spring 7 should always have the ability to drive the flange 65 to rotate. The elastic force, specifically, should be the elastic force that drives the flange 65 to drive the free end of the ratchet 51 to rotate toward the insertion direction of the tooth groove 55 of the ratchet 5 .

Embodiment two:

Referring to FIG. 6 , the difference between this embodiment and Embodiment 1 lies in the controllable components, specifically: there are a plurality of teeth 8 in a circumferential array on the outer peripheral side of the mandrel 21, and the controllable components include:

An engaging piece 81 , the engaging piece 81 is rotatably disposed in the first installation groove 32 , and the engaging piece 81 is provided with an engaging groove 82 for cooperating with the tooth 8 ;

A positioning assembly, the positioning assembly is arranged on the movable member 12 , and the positioning assembly is used to limit the position of the engaging piece 81 after the mandrel 21 engages with the engaging piece 81 .

In this embodiment, one end of the engaging piece 81 is rotatably connected to the mounting base 10 through a pin shaft. In this embodiment, the mandrel 21 is designed to be cylindrical to achieve the purpose of increasing the number of teeth 8. At the same time, the engaging piece 81 is designed as a C shape, which can increase the engagement strength between the engaging piece 81 and the mandrel 21, reduce the load on a single tooth 8, and prolong the service life of the control member.

When it is necessary to enter the bumpy mode, the engaging piece 81 is engaged with the tooth 8 through the positioning assembly, so that the mandrel 21 and the movable member 12 are relatively fixed. It only needs to be separated, and the operation is simple and easy to realize.

In a specific embodiment, the positioning component includes:

A rotating shaft 9, the rotating shaft 9 is rotatably connected in the first installation groove 32;

A cam 91, the cam 91 is fixed on the rotating shaft 9;

A limiting shaft 92, the limiting shaft 92 is fixed in the first installation groove 32;

The second torsion spring 93, the second torsion spring 93 is sleeved on the limit shaft 92, and one extension end of the second torsion spring 93 is fixed on the movable member 12, and the other extends One end of the engaging piece 81 is pressed against the outer side of the engaging piece 81 for driving an extended end of the engaging piece 81 to be pressed against the side of the cam 91 all the time.

In this embodiment, the rotating shaft 9 can be rotatably connected to the mounting base 10 through a bearing, and the rotating shaft 9 extends through the connecting cover and is fixed with the second rotating handle 103 , so that the riding user can control the rotating shaft 9 through the second rotating handle 103 Rotate, wherein, one end of the engagement piece 81 is located between the second torsion spring 93 and the cam 91 .

When entering the smooth mode from the bumpy mode, the rider turns the second rotary handle 103 to drive the rotating shaft 9 and the cam 91 to rotate, and the tip of the cam 91 squeezes an extended end corresponding to the engaging piece 81, thereby driving the engaging piece 81 to separate from the gear 8 , that is to say, at this time, the mandrel 21 is not tightly held, so the one-way resistance is invalid, wherein, due to the existence of the second torsion spring 93, the cam 91 will always keep in contact with the engaging piece 81, thereby acting on the cam 91. To the role of the limit.

When entering the jolting mode from the smooth mode, reversely rotate the rotating shaft 9 to drive the cam 91 to rotate, and the engaging piece 81 is pressed against the tip of the cam 91 (the shortest end of the cam 91 from its axis of rotation) under the action of the second torsion spring 93. Move to the non-tip against the cam 91 (the non-shortest end of the cam 91 from its axis of rotation), at this moment, the engaging piece 81 and the mounting seat 10 rotate until meshing with the tooth 8, that is to say, the mandrel 21 is tightly held, and the one-way bearing 2 and the P joint seat 3 are fixed to realize the above-mentioned one-way damping effect.

In this embodiment, the limiting shaft 92 is fixed on the mounting base 10, and because the second torsion spring 93 has better elastic deformation capacity, it can continuously press an extended end of the engaging piece 81 against the peripheral side of the cam 91. .

The embodiment of the utility model also provides a bicycle, including a bicycle body and the damping rear derailleur described above, and the damping rear derailleur is installed on the bicycle body (not shown).

Due to the simple and compact structure of the rear derailleur of the present application, the rear derailleur of the present application has high applicability and practicability.

The above is only a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of various Equivalent modifications or replacements shall all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. A damped rear derailleur, comprising:

-a base member (1), -an actuating member (11), -a movable member (12), -a chain guide member (13), said actuating member (11) being rotatably arranged at one end on said base member (1) and at one end on said movable member (12), said movable member (12) being rotatably arranged at one end of said chain guide member (13), characterized in that: the movable component (12) comprises a one-way bearing (2), a P joint seat (3) and a main shaft (4), wherein the one-way bearing (2) comprises a mandrel (21), a rolling piece (22) and an external component (23) which are sequentially connected from inside to outside;

the main shaft (4) is fixedly connected with one end of the chain guide component (13) and fixedly connected with the external component (23) after penetrating through the P joint seat (3);

when the main shaft (4) rotates along a first direction, the rolling piece (22) does not generate friction force with the mandrel (21), and when the main shaft (4) rotates along a second direction, the rolling piece (22) generates friction force with the mandrel (21).

2. The damped rear derailleur according to claim 1, wherein:

the P-joint seat (3) is provided with a first mounting groove (32), a mounting seat (10) is fixedly arranged in the first mounting groove (32), and the mandrel (21) is connected with the mounting seat (10);

the free end of the main shaft (4) penetrates through the P joint seat (3) and extends into the first mounting groove (32), and the external component (23) is fixedly arranged at the free end of the main shaft (4).

3. The damped rear derailleur according to claim 2, wherein: the device also comprises a controllable component arranged on the mounting seat (10), and the controllable component is used for controlling the mandrel (21) and the P-joint seat (3) to rotate or be fixed relatively.

4. The damped rear derailleur according to claim 3, wherein: the controllable member comprises:

the ratchet wheel (5), the said ratchet wheel (5) is fixed on the said mandrel (21) coaxially;

the pawl (51), the said pawl (51) is connected to the said mount pad (10) rotatably;

the control piece (52) is arranged on the mounting seat (10) and connected with the pawl (51) and used for controlling the pawl (51) to be connected with the ratchet wheel (5) or controlling the pawl (51) not to be connected with the ratchet wheel (5).

5. The damped rear derailleur according to claim 4, wherein the first mounting groove (32) has a first limit groove (33) and a second limit groove (34) spaced apart in sequence from an inner sidewall thereof, the control member (52) including:

the switch shaft (53), the switch shaft (53) is connected to the first mounting groove (32) in a rotating mode, and the pawl (51) is coaxially arranged on the switch shaft (53);

the pulling sheet (54), the said pulling sheet (54) is fixed on the said switch shaft (53) coaxially;

when the pulling piece (54) is at least partially embedded into the first limiting groove (33), the free end of the pawl (51) is disengaged from the tooth socket (55) of the ratchet wheel (5), and when the pulling piece (54) is at least partially embedded into the second limiting groove (34), the free end of the pawl (51) is embedded into one of the tooth sockets (55) of the ratchet wheel (5).

6. The damped rear derailleur according to claim 5, wherein:

the switch shaft (53) comprises a first cylindrical part (6) and a second cylindrical part (61) which is connected with each other and is provided with a notch at the outer side, and the ratchet wheel (5) is sleeved on the first cylindrical part (6);

the pulling piece (54) comprises a sleeving part (62), a connecting part (63) and an abutting part (64) which are sequentially connected, the connecting part (63) is sleeved on the second cylindrical part (61), one end of the connecting part (63) is connected to one side of the sleeving part (62), the other end of the connecting part (63) forms an included angle with the abutting part (64), and the connecting part (63) and the abutting part (64) is used for being embedded into the first limiting groove (33) or the second limiting groove (34);

the pawl (51) is provided with a flange (65) which is used for abutting against one end of the connecting part (63);

the control piece (52) further comprises an elastic resetting piece which is arranged on the mounting seat (10) and is used for driving the pawl (51) to be embedded into a tooth groove (55) of the ratchet wheel (5).

7. The damped rear derailleur according to claim 6, wherein: the elastic resetting piece is a first torsion spring (7) sleeved on the switch shaft (53), one end of the first torsion spring (7) is fixedly arranged on the mounting seat (10), and the other end of the first torsion spring (7) abuts against one side, away from the abutting part (64), of the flange (65).

8. The damped rear derailleur according to claim 3, wherein the spindle (21) has a plurality of teeth (8) circumferentially arrayed on an outer peripheral side thereof, the controllable member including:

the engaging piece (81) is rotatably arranged on the mounting seat (10), and the engaging piece (81) is provided with an engaging groove (82) used for being matched with the engaging tooth (8);

a positioning assembly provided on the movable member (12) for defining a position of the engagement piece (81) after the mandrel (21) is engaged with the engagement piece (81).

9. The damped rear derailleur according to claim 8, wherein the positioning assembly includes:

the rotating shaft (9), the rotating shaft (9) is rotatably connected to the mounting seat (10);

the cam (91), the said cam (91) is fixed on the said spindle (9);

the limiting shaft (92), the limiting shaft (92) is fixedly arranged on the mounting seat (10);

the second torsion spring (93) is sleeved on the limiting shaft (92), one extending end of the second torsion spring (93) is fixedly arranged on the movable component (12), the other extending end of the second torsion spring abuts against the outer side of the meshing piece (81), and the second torsion spring is used for driving one extending end of the meshing piece (81) to abut against the side face of the cam (91) all the time.

10. A bicycle, characterized in that: comprising a bicycle body and a damped rear derailleur according to any one of claims 1-9 mounted on said bicycle body.

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