CN218085903U - Damping type rear derailleur and bicycle - Google Patents

Abstract

The embodiment of the utility model discloses chain ware and bicycle are dialled to damping formula rear, chain ware is dialled including the base component after the damping formula, actuate the component, movable member, the chain guide component, movable member rotationally sets up in the one end of chain guide component, wherein, movable member includes one-way damping part, the joint seat of P and main shaft, the one end of main shaft and the one end fixed connection of chain guide component, the other end is coaxial to be worn to locate the joint seat of P, one-way damping part includes dabber and rolling member, the dabber is connected with the joint seat of P, the rolling member is connected with the other end sliding connection of main shaft and can contradict with the periphery side of dabber; when the main shaft rotates along the first direction, the rolling piece does not generate friction force with the mandrel, and when the main shaft rotates along the second direction, the rolling piece generates friction force with the mandrel. The embodiment of the utility model provides a realize the one-way damped purpose of rear derailleur for the chain can not produce unexpected lax, great improvement rear derailleur's practicality and suitability.

Description

Damping type rear derailleur and bicycle

Technical Field

The utility model relates to a bicycle speed change gear field especially relates to a chain ware and bicycle are dialled to damping formula rear derailleur.

Background

The rear derailleur, called rear derailleur for short, is an important component of a speed changing system on a variable speed bicycle such as a mountain bike, a road bike and the like, and is used for changing chains on different flywheel plates so as to meet different road conditions and enable a rider to drive the bicycle to move forward more reasonably by using the body.

However, when the bicycle is riding, for example, on bumpy road conditions, the inertia of bumping and vibration can cause the chain guide member and the connecting seat to rotate correspondingly, so that the chain is loosened, the chain falls off, and the practicability of the rear derailleur is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a chain ware and bicycle are dialled to damping formula rear aims at solving the relatively poor problem of practicality of the chain ware is dialled to current rear.

In order to solve the technical problem, the purpose of the utility model is realized through following technical scheme: a damped rear derailleur is provided, comprising:

a base member, an actuating member, a movable member, a chain guide member, the actuating member having one end rotatably disposed on the base member and one end rotatably disposed on the movable member, the movable member rotatably disposed at one end of the chain guide member;

the movable component comprises a one-way damping part, a P joint seat and a main shaft, one end of the main shaft is fixedly connected with one end of the chain guide component, the other end of the main shaft coaxially penetrates through the P joint seat, the one-way damping part comprises a mandrel and a rolling piece, the mandrel is connected with the P joint seat, and the rolling piece is connected with the other end of the main shaft in a sliding mode and can abut against the outer peripheral side of the mandrel;

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

Further, in the above-mentioned case,

the joint seat P is provided with a first mounting groove, a mounting seat is fixedly arranged in the first mounting groove, and the mandrel is connected with the mounting seat;

the free end of the main shaft penetrates through the P joint seat and extends into the first mounting groove, a rotary groove for embedding one end of the mandrel is formed in the free end of the main shaft, and special-shaped sliding grooves are formed in the inner side wall of the rotary groove at intervals;

the rolling part comprises a roller or a rolling ball which is connected with the special-shaped sliding groove in a sliding mode and a homing part which is arranged in the special-shaped sliding groove and is abutted against the roller or the rolling ball, the homing part is used for driving the roller or the rolling ball to abut against the first position of the special-shaped sliding groove, and when the main shaft rotates along the second direction, the rolling part and the mandrel generate friction force.

Further, the dysmorphism spout include with the dysmorphism portion of gyration inslot lateral wall intercommunication, with the installation department of dysmorphism portion one side intercommunication, the piece that returns is located including inlaying installation piece in the installation department, set firmly in the conflict piece of installation piece one end, the contact piece is towards keeping away from the direction of installation department and outwards extending the setting, the free end of contact piece with roller or spin are contradicted.

Furthermore, the main shaft comprises a main joint post and an auxiliary joint post which are coaxially and fixedly arranged, one end of the main joint post is fixedly connected with one end of the chain guide member, the other end of the main joint post is fixedly connected with the auxiliary joint post after penetrating through the P joint seat, the special-shaped sliding groove and the rotary groove are both arranged on the auxiliary joint post, the outer diameter of the auxiliary joint post is 16-18 mm, and the inner diameter of the main joint post is 7.5-8.5 mm.

Further, the main shaft is made of an iron-based powder metallurgy material.

Furthermore, the device also comprises a controllable component arranged on the mounting seat, and the controllable component is used for controlling the mandrel and the P joint seat to rotate or be fixed relatively.

Further, the controllable member comprises:

the ratchet wheel is coaxially and fixedly arranged on the mandrel;

the pawl is rotationally connected to the mounting seat;

the control piece is arranged on the mounting seat, is connected with the pawl and is used for controlling the pawl to be connected with the ratchet wheel or controlling the pawl not to be connected with the ratchet wheel;

first mounting groove inside wall interval in proper order is provided with first spacing groove, second spacing groove, the control includes:

the switch shaft is rotatably connected into the first mounting groove, and the pawl is coaxially arranged on the switch shaft;

the pulling piece is coaxially and fixedly arranged on the switch shaft;

when the pulling sheet is at least partially embedded into the first limiting groove, the free end of the pawl is embedded into one of the tooth grooves of the ratchet wheel, and when the pulling sheet is at least partially embedded into the second limiting groove, the free end of the pawl is separated from the tooth groove of the ratchet wheel.

Furthermore, the switch shaft comprises a first cylindrical part and a second cylindrical part, wherein the first cylindrical part and the second cylindrical part are connected, a gap is formed in the outer side of the second cylindrical part, and the ratchet wheel is sleeved on the first cylindrical part;

the pull sheet comprises a sleeving part, a connecting part and a butting part which are sequentially connected, the connecting part is sleeved on the second cylindrical part, one end of the connecting part is connected to one side of the sleeving part, the other end of the connecting part forms an included angle with the butting part, and the joint of the connecting part and the butting part is used for being embedded into the first limiting groove or the second limiting groove;

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

the control piece also comprises an elastic resetting piece which is arranged on the mounting seat and is used for driving the pawl to be embedded into the tooth groove of the ratchet wheel;

the elastic reset piece is a first torsion spring sleeved on the switch shaft, one end of the first torsion spring is fixedly arranged on the mounting seat, and the other end of the first torsion spring is abutted to one side of the flange, which deviates from the abutting part.

Further, the mandrel has a plurality of teeth circumferentially arrayed on an outer peripheral side thereof, and the controllable member includes:

the meshing piece is rotatably arranged on the mounting seat and is provided with a meshing groove used for being matched with the meshing teeth;

a positioning assembly disposed on the movable member, the positioning component is used for limiting the position of the engagement piece after the mandrel is engaged with the engagement piece.

Further, the positioning assembly comprises:

the rotating shaft is rotatably connected to the mounting seat;

the cam is fixedly arranged on the rotating shaft;

the limiting shaft is fixedly arranged on the mounting seat;

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

The embodiment of the utility model provides a still provide a bicycle, wherein: comprising a bicycle body and a damped rear derailleur as described above, said damped rear derailleur being mounted on said bicycle body.

An embodiment of the utility model provides a chain ware and bicycle are moved to damping formula rear derailleur, wherein: the damping type rear derailleur comprises a base component, an actuating component, a movable component and a chain guide component, wherein one end of the actuating component is rotatably arranged on the base component, one end of the actuating component is rotatably arranged on the movable component, the movable component is rotatably arranged at one end of the chain guide component, the movable component comprises a one-way damping part, a P joint seat and a main shaft, one end of the main shaft is fixedly connected with one end of the chain guide component, the other end of the main shaft is coaxially arranged in the P joint seat in a penetrating mode, the one-way damping part comprises a mandrel and a rolling piece, the mandrel is connected with the P joint seat, and the rolling piece is connected with the other end of the main shaft in a sliding mode and can abut against the outer peripheral side of the mandrel; when the main shaft rotates along the first direction, the rolling piece does not generate friction force with the mandrel, and when the main shaft rotates along the second direction, the rolling piece generates friction force with the mandrel. The embodiment of the utility model provides a realize the one-way damped purpose of rear derailleur for the chain can not produce unexpected lax, great improvement rear derailleur's practicality and suitability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic structural view of a damped rear derailleur in a first perspective in accordance with a first embodiment of the present invention;

FIG. 2 is a schematic view of a damped rear derailleur in a second perspective in accordance with one embodiment of the present invention;

FIG. 3 is a partial exploded view of the damped rear derailleur in accordance with one embodiment of the present invention;

FIG. 4 is a schematic structural view of a main shaft of the damped rear derailleur in accordance with one embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first position and a second position of a damped rear derailleur in accordance with one embodiment of the present invention;

FIG. 6 is a partial schematic structural view of a damped rear derailleur in accordance with an embodiment of the present invention;

FIG. 7 is a partial cross sectional view of a damped rear derailleur in accordance with one embodiment of the present invention;

fig. 8 is a partial exploded view of the damped rear derailleur in accordance with the second embodiment of the present invention.

The labels in the figures illustrate:

1. a base member; 11. an actuating member; 12. a movable member; 13. a chain guide member; 131. a first link plate; 132. a second link plate; 133. a guide wheel; 134. a tension pulley; 14. a gasket; 15. an avoidance groove; 16. a return spring; 2. a one-way damping member; 21. a mandrel; 22. a rolling member; 23. a roller; 24. a homing component; 25. mounting a sheet; 26. a contact piece is abutted; 3. a P joint seat; 32. a first mounting groove; 33. a first limit groove; 34. a second limit groove; 35. a third limiting groove; 36. a second mounting groove; 37. a first inclined surface; 38. a second inclined surface; 4. a main shaft; 41. a rotary trough; 42. a special-shaped chute; 421. a shaped portion; 422. An installation part; 43. a primary bond post; 44. a secondary bond post; 45. a first position; 46. a second position; 5. A ratchet wheel; 51. a pawl; 52. a control member; 53. a switch shaft; 54. pulling the slices; 55. a tooth socket; 56. a third inclined surface; 6. a first cylindrical portion; 61. a second cylindrical portion; 62. a housing portion; 63. a connecting portion; 64. an abutting portion; 65. a flange; 7. a first torsion spring; 8. a rodent; 81. an engaging piece; 82. meshing grooves; 9. a rotating shaft; 91. A cam; 92. a limiting shaft; 93. a second torsion spring; 10. a mounting seat; 101. a P joint cover; 102. a first rotating handle; 103. a second rotating handle; 104. a limiting ring; 105. an engagement hole; 106. and (4) a sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

The first embodiment is as follows:

with reference to fig. 1-7, an embodiment of the present invention provides 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 having one end rotatably disposed on said base member 1 and one end rotatably disposed on said movable member 12, said movable member 12 rotatably disposed at one end of said chain guide member 13;

the movable member 12 comprises a one-way damping part 2, a P-joint seat 3 and a main shaft 4, one end of the main shaft 4 is fixedly connected with one end of the chain guide member 13, and the other end of the main shaft is coaxially arranged on the P-joint seat 3 in a penetrating manner, the one-way damping part 2 comprises a mandrel 21 and a rolling piece 22, the mandrel 21 is connected with the P-joint seat 3, and the rolling piece 22 is connected with the other end of the main shaft 4 in a sliding manner and can be abutted against the outer peripheral side of the mandrel 21;

when the spindle 4 rotates in a first direction, the rolling member 22 does not generate friction with the spindle 21, and when the spindle 4 rotates in a second direction, the rolling member 22 generates friction with the spindle 21.

In the present embodiment, referring to fig. 1 and 2, it should be noted that the present application mainly improves the damping member, and the base member 1, the actuating member 11, the movable member 12 and the chain guide member 13 adopt the prior art solution, and the present application will not be described more than once.

Referring to fig. 1 and 2, in particular, the chain guide member 13 includes a first link plate 131, a second link plate 132, a guide pulley 133 and a tension pulley 134, wherein the guide pulley 133 is rotatably mounted between the first link plate 131 and the second link plate 132 by bolting and is located at one end of the two link plates, and the tension pulley 134 is rotatably mounted between the first link plate 131 and the second link plate 132 by bolting and is located at the other end of the two link plates, wherein one end of the main shaft 4 is fixedly secured to one end of the first link plate 131 by a bolt.

In this embodiment, since the main shaft 4 and the P-joint seat 3 are rotatably connected and the spindle 21 and the P-joint seat 3 are connected together, that is, when the movable member 12 and the first link plate 131 rotate relatively, the spindle 21 and the rolling element 22 generate a corresponding friction relationship, specifically, when the main shaft 4 rotates in a first direction (e.g., clockwise direction), the rolling element 22 does not generate a friction force with the spindle 21, and when the main shaft 4 rotates in a second direction (e.g., counterclockwise direction), the rolling element 22 generates a friction force with the spindle 21.

In the operating scenario of bicycle riding, during riding on rough terrain, jolts and vibrations of the related art bicycle can cause the chain guide member 13 to rotate counterclockwise, thereby causing the chain to generate undesired slack, while the rear derailleur of the present application has a function of one-way damping, specifically, when the main shaft 4 rotates clockwise, the rolling element 22 does not generate friction with the spindle 21, when the main shaft 4 rotates counterclockwise, the rolling element 22 generates friction with the spindle 21, that is, when the main shaft 4 rotates clockwise, the one-way damping member 2 does not obstruct rotation between the P-joint seat 3 and the main shaft 4, and when the main shaft 4 rotates counterclockwise, the one-way damping member 2 obstructs rotation between the P-joint seat 3 and the main shaft 4, so that the chain guide member 13 cannot rotate counterclockwise, even if the chain does not generate undesired slack.

With reference to fig. 3, 6 and 7, in a specific embodiment,

the P-joint seat 3 is provided with a first installation groove 32, an installation seat 10 is fixedly arranged 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 penetrates through the P-joint seat 3 and extends into the first mounting groove 32, the free end of the main shaft 4 is provided with a rotary groove 41 for embedding one end of the mandrel 21, and the inner side wall of the rotary groove 41 is provided with special-shaped sliding grooves 42 at intervals;

the rolling member 22 comprises a roller 23 or a rolling ball slidably connected to the irregular chute 42, and a homing member 24 installed in the irregular chute 42 and abutting against the roller 23 or the rolling ball, wherein the homing member 24 is used for driving the roller 23 or the rolling ball to abut against a first position 45 of the irregular chute 42, so that when the main shaft 4 rotates along a second direction, the rolling member 22 and the mandrel 21 generate friction force.

In this embodiment, the P-joint seat 3 is rotatably connected to the actuating member 11 and is rotatably connected to the first chain plate 131, specifically, a gasket 14 is disposed between the P-joint seat 3 and the first chain plate 131, the gasket 14 is fixedly connected to the first chain plate 131, an avoiding groove 15 is disposed at an end of the P-joint seat 3 close to the first chain plate 131, a return spring 16 is disposed in the avoiding groove 15, one end of the return spring 16 is fixedly disposed at a bottom of the avoiding groove 15, and the other end of the return spring is fixedly disposed at the gasket 14, so as to return 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 mounting groove 36 communicated with the first mounting groove 32, the main shaft 4 passes through the second mounting groove 36 and extends into the first mounting groove 32 to realize connection with the rolling members 22, specifically, the rotary groove 41 extends along the rotation direction of the main shaft 4, and in order to improve the connection stability between the rolling members 22 and the spindle 21, a plurality of special-shaped sliding grooves 42 are arranged at intervals on the inner side wall of the rotary groove 41, and a plurality of rolling members 22 are correspondingly arranged, as a more preferred embodiment, 6 to 8 rolling members 22 may be arranged, in this embodiment, 6 rolling members 22 and 6 special-shaped sliding grooves 42 are arranged.

It should be noted that, the rolling member 22 of the present application is the roller 23 to increase the contact area between the rolling member 22 and the core shaft 21, but at the time of manufacturing, according to actual needs, the rolling member 22 may be a spherical rolling ball, in this embodiment, the roller 23 may be slidably and rotatably connected to the shaped chute 42, in order to position the roller 23, the homing member 24 is provided, specifically, the homing member 24 urges the roller 23 to be always in close contact with the first position 45 of the shaped chute 42, wherein, for convenience of understanding, the present application respectively names the two ends of the shaped chute 42 as the first position 45 and the second position 46, when the roller 23 is located at the first position 45, the outer peripheral side of the roller 23 at least partially protrudes out of the opening of the shaped chute 42, that is, the roller 23 at least partially protrudes into the revolving chute 41 to achieve interference between the roller 23 and the outer peripheral side of the core shaft 21, and when the roller 23 slides in a direction away from the first position 45 (that is, to slide close to the second position 46), the area of the protruding out of the shaped chute 42 of the roller 23 gradually decreases, that is, the geometric distance between the center line of the first position 45 and the center line of the second position 41 is smaller than the geometric center line 46 of the second position 41.

In practical applications, when the chain guide member 13, the first link plate 131 and the main shaft 4 rotate in the first direction at the same time, the rolling element 22 does not generate friction force with the mandrel 21, the rolling element 22 is located between the first position 45 and the second position 46, that is, the rolling element 22 is located completely in the shaped chute 42, in other words, the mandrel 21 has no friction contact with the roller 23, and when the chain guide member 13, the first link plate 131 and the main shaft 4 rotate in the second direction, the roller 23 is located at the first position 45, and the roller 23 generates friction force with the mandrel 21, that is, the mandrel 21 and the roller 23 are in friction contact, thereby preventing the chain guide member 13 from rotating in an undesired direction.

In a specific embodiment, the irregular chute 42 includes an irregular portion 421 communicated with the inner side wall of the rotary chute 41, and a mounting portion 422 communicated with one side of the irregular portion 421, the homing member 24 includes a mounting piece 25 embedded in the mounting portion 422, and a contact piece 26 fixedly disposed at one end of the mounting piece 25, the contact piece 26 extends outward in a direction away from the mounting portion 422, and a free end of the contact piece 26 contacts with the roller 23 or the rolling ball.

In this embodiment, the roller 23 is slidably connected to the special-shaped portion 421, the second position 46 is an end of the special-shaped portion 421 close to the mounting portion 422, and the first position 45 is an end of the special-shaped portion 421 away from the mounting portion 422, wherein the mounting piece 25 and the abutting piece 26 are integrally formed to improve the structural strength of the return piece 24, it should be understood that an included angle is formed between the mounting piece 25 and the abutting piece 26 to form a hook-shaped structure, so as to provide a better elastic return effect for the roller 23.

In a specific embodiment, the main shaft 4 includes a main engagement post 43 and an auxiliary engagement post 44 coaxially and fixedly disposed, one end of the main engagement post 43 is fixedly connected to one end of the chain guide 13, the other end of the main engagement post is fixedly connected to the auxiliary engagement post 44 after passing through the P-joint seat 3, the irregular-shaped sliding slot 42 and the rotary slot 41 are both disposed on the auxiliary engagement post 44, the outer diameter of the auxiliary engagement post 44 is 16-18 mm, and the inner diameter of the main engagement post 43 is 7.5-8.5 mm.

In the present embodiment, the primary engagement post 43 and the secondary engagement post 44 are integrally formed to improve the structural strength of the main shaft 4, wherein the outer diameter of the primary engagement post 43 is larger than the outer diameter of the secondary engagement post 44; in the related art, the unidirectional damping bearing is usually directly installed in the rotary groove 41 of the secondary joint post 44, since the inner diameter of the rotary groove 41 is fixed, the unidirectional damping bearing itself has a certain thickness, which will cause the problem that the roller 23 of the unidirectional damping bearing itself has a small volume, specifically, the outer diameter of the roller 23 of the conventional unidirectional damping bearing is 1.5 mm, and the life test data is about 1 ten thousand times, while the roller 23 of the present application is arranged on the main shaft 4, so that the roller 23 of the present application can utilize the wall thickness of the main shaft 4 itself, and further increase the volume of the roller 23, specifically, the aperture of the roller 23 of the present application can be 1.8-2.0 mm, and the life test data of the roller 23 of the present application is about 2 ten thousand times, thereby obviously obtaining the roller 23 of the present application with good service life and structural strength.

More specifically, the secondary commissure posts 44 of the present application have an outer diameter of 17mm and the primary commissure posts 43 have an inner diameter of 7.5-8.5 mm.

In this embodiment, one end of the auxiliary engaging column 44 departing from the main engaging column 43 is provided with an engaging hole 105 communicated with the rotary groove 41 and the irregular-shaped sliding groove 42, and a sealing ring 106 covering the engaging hole 105 is arranged on the auxiliary engaging column 44, wherein the sealing ring 106 can be fixedly connected with the auxiliary engaging column 44 through bonding, one end of the mandrel 21 is penetrated through a center hole of the sealing ring 106 and extends into the rotary groove 41, and through the setting of the sealing ring 106, the roller 23 and the return piece 24 are embedded into the port of the irregular-shaped sliding groove 42 conveniently, so that the effect of convenient installation is achieved.

In a specific embodiment, the main shaft 4 is made of an iron-based powder metallurgy material.

In this example, the iron-based powder metallurgy material itself contained oil, and thus had better lubricating properties and frictional properties.

Referring to fig. 3, 6 and 7, in one embodiment, the damped rear derailleur further includes a controllable member disposed on the mounting base 10 for controlling the pivot shaft 21 to rotate or be fixed relative to the P-joint base 3.

In the present embodiment, in order to improve the applicability of the rear derailleur of the present application, in the present embodiment, a controllable element of the control core shaft 21 is further provided, and for convenience of description, the mode corresponding to the controllable element is named as a bump mode and a smooth mode, wherein the specific application scenario of the bump mode is as follows, a riding user can select to use the controllable element to control the core shaft 21 to be relatively fixed with the mounting seat 10 on a bump road condition, so that the one-way damping part 2 does not generate a one-way damping effect when the chain guide member 13 rotates in the first direction, and the one-way damping effect is generated on the bearing when the chain guide member 13 rotates in the second direction; the concrete application scene of the smooth-riding mode is as follows, the riding user can select to utilize chain guide member 13 to control dabber 21 and one-way damping part 2 relative rotation at smooth-riding road conditions, namely no matter chain guide member 13 rotates towards the first direction or rotates towards the second direction, one-way damping part 2 does not all produce one-way damping effect, through the selection of the mode to the control member, can effectively improve the operation comfort of the riding user, it is worth noting, at the riding in-process, specifically at what kind of control mode of road conditions selection, this application does not specifically limit.

With reference to fig. 3, 6 and 7, in an embodiment, the controllable member includes:

the ratchet wheel 5 is coaxially and fixedly arranged on the mandrel 21;

the pawl 51 is rotationally connected to the mounting seat 10;

and the control piece 52 is arranged on the mounting seat 10, is connected with the pawl 51 and is 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.

In this embodiment, the mounting seat 10 may be connected to the P-joint seat 3 by bolting, the mounting seat 10 is located between the ratchet 5 and the one-way damping member 2, wherein the stem 21 is rotatably connected to the mounting seat 10, in this embodiment, the ratchet 5 may be fixed to the stem 21 by a key connection, in actual use, the user controls the pawl 51 to be connected to the ratchet 5 by the control member 52, that is, the free end of the pawl 51 is embedded into one of the tooth grooves 55 of the ratchet 5, so that the pawl 51 and the stem 21 cannot rotate any more, that is, the stem 21 is fixed relative to the P-joint seat 3, and at this time, the rear derailleur enters a smooth mode; or the free end of the pawl 51 is pulled out of one of the splines 55 of the ratchet wheel 5 so that the ratchet wheel 5 and the stem 21 can rotate simultaneously, i.e., the stem 21 rotates relative to the P-joint seat 3, at which time the rear derailleur enters the jounce mode.

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

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

the pulling sheet 54 is coaxially and fixedly arranged on the switch shaft 53;

when the pulling piece 54 is at least partially inserted 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 enters the third limiting groove 35, and 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 sockets 55 of the ratchet wheel 5.

In this embodiment, the first limiting groove 33 and the second limiting groove 34 are arranged at an interval, wherein the rotation of the pulling piece 54 is controlled by the switch shaft 53, when the rear derailleur enters a smooth mode, the switch shaft 53 is rotated to drive the pawl 51 to rotate, and the free end of the pawl 51 is embedded into 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 is embedded into the second limiting groove 34 and limited, only when the switch shaft 53 is subjected to an external force, for example, a user applies an opposite force to the switch shaft 53 to rotate the free end of the pawl 51 towards a direction away from the tooth groove 55, the pulling piece 54 slides out of the second limiting groove 34, and it can be known that the first limiting groove 33 is used for limiting the pulling piece 54 after the pawl 51 is away from the tooth groove 55, and the third limiting groove 35 is used for limiting the pawl 51 after the tooth groove 51 is away from the tooth groove 55, that is used by cooperation of the first limiting groove 33, the second limiting groove 34 and the third limiting groove 35, so that the rotation of the switch shaft 53 is reduced, and the desired smooth mode or the bumpiness mode is achieved.

It should be understood that, during manufacturing, according to actual needs, the third limiting groove 35 may not be needed, and since the pulling piece 54 is limited by the first limiting groove 33, the switch shaft 53 may not rotate under the effect of external force, so that the pawl 51 may not rotate undesirably with the mounting seat 10, and the limiting stability between the control member 52 and the mounting seat 10 may be improved by the cooperation of the first limiting groove 33 and the third limiting groove 35.

Referring to fig. 3, 6 and 7, in a specific embodiment, the switch shaft 53 includes a first cylindrical portion 6 and a second cylindrical portion 61 having a notch on an outer side thereof, which are connected, and the ratchet 5 is sleeved on the first cylindrical portion 6;

the pulling piece 54 comprises a sleeve part 62, a connecting part 63 and an abutting part 64 which are connected in sequence, 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 sleeve part 62, and the other end of the connecting part 63 forms an included angle with the abutting part 64, wherein 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 for abutting against one end of the connecting portion 63;

the control member 52 further comprises an elastic restoring member disposed on the mounting seat 10 for urging the pawl 51 to be inserted into the tooth slot 55 of the ratchet wheel 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 rotating the switch shaft 53, the other end of the switch shaft 53 is fixedly sleeved with a limit ring 104, and the limit ring 104 abuts against one end of the mounting base 10 deviating from the first rotating handle 102 to limit the switch shaft 53 from being separated from the mounting base 10.

It should be noted that, the P joint seat 3 of the present application is further 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 with the P joint seat 3 by bolting, so as to play a role in dust prevention and protection for 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 rotating handle 102.

Because the pulling piece 54 and the switch shaft 53 rotate coaxially, in order to facilitate the insertion of the pulling piece 54 into the first limiting groove 33 or the second limiting groove 34 and the insertion of the free end of the pawl 51 into the third limiting groove 35, the first limiting groove 33, the second limiting groove 34 and the second limiting groove 34 of the present application have the same structure, wherein the second limiting groove 34 includes the first inclined surface 37 and the second inclined surface 38 connected with each other, the first inclined surface 37 and the second inclined surface 38 extend in the direction away from each other, by such design, the joint of the connecting portion 63 and the abutting portion 64 can be better clamped in the first limiting groove 33 or the second limiting groove 34, and one side of the connecting portion 63 can abut against the first inclined surface 37 of the first limiting groove 33 or the second limiting groove 34, one side of the abutting portion 64 can abut against the second inclined surface 38 of the first limiting groove 33 or the second limiting groove 34, that the contact area between the pulling piece 54 and the first limiting groove 33 or the second limiting groove 34 is increased, thereby improving the stability of the first limiting groove 33 and the second limiting groove 34, and the stability of the third inclined surface 35 is also needed for explaining the stability of the third inclined surface 35.

Referring to fig. 3, 6 and 7, in particular, the sleeving portion 62, the connecting portion 63 and the abutting portion 64 are integrally formed to improve the structural stability of the pulling piece 54, wherein an included angle between the connecting portion 63 and the abutting portion 64 is a degree.

In the embodiment, in order to reduce manual operation and improve the convenience of the rear derailleur, the mounting seat 10 is provided with an elastic reset member, which is used for automatically driving the pawl 51 to be embedded into one of the tooth grooves 55 of the ratchet 5 after the user drives the pulling piece 54 to be separated from the first limiting groove 33, and is used for abutting one side of the abutting portion 64 against the second inclined surface 38 of the first limiting groove 33 or the second limiting groove 34, so as to improve the stability of connection between the pulling piece 54 and the mounting seat 10.

In an embodiment, the elastic restoring element is a first torsion spring 7 sleeved on the switch shaft 53, one end of the first torsion spring 7 is fixedly disposed on the mounting seat 10, and the other end of the first torsion spring 7 abuts against a side of the flange 65 away from the abutting portion 64.

In this embodiment, a flange 65 is disposed at a rotation end of the pawl 51 for being connected with the switch shaft 53, two sides of the flange 65 are respectively used for abutting against the sleeving portion 62 and the first torsion spring 7, specifically, the first torsion spring 7 and the pawl 51 are both sleeved on the switch shaft 53, wherein the rotation end of the pawl 51 is located above a coil of the first torsion spring 7, two ends of the first torsion spring 7 are respectively connected with a side of the mounting seat 10 departing from the limiting ring 104 and a side of the flange 65 departing from the abutting portion 64, it should be noted that, when the first torsion spring 7 is mounted, the first torsion spring 7 should always have an elastic force for driving the flange 65 to rotate, specifically, the elastic force for driving the flange 65 to drive a free end of the pawl 51 to rotate towards a direction in which the tooth socket 55 of the ratchet 5 is embedded.

Example two:

with reference to fig. 8, the difference between the present embodiment and the first embodiment is that the controllable components specifically include: the mandrel 21 has a plurality of teeth 8 circumferentially arrayed on an outer peripheral side thereof, and the controllable member includes:

an engaging piece 81, wherein the engaging piece 81 is rotatably arranged in the first mounting groove 32, and the engaging piece 81 is provided with an engaging groove 82 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.

In the present embodiment, one end of the engaging piece 81 is rotatably connected to the mounting seat 10 by a pin, in the present embodiment, the core shaft 21 is designed to be cylindrical, so as to achieve the purpose of increasing the number of the rodents 8, and meanwhile, the engaging piece 81 is designed to be C-shaped, so that the engaging strength between the engaging piece 81 and the core shaft 21 can be increased, the load applied to a single rodent 8 can be reduced, and the service life of the control member can be prolonged.

When the bumping mode needs to be entered, the engaging piece 81 is engaged with the engaging tooth 8 through the positioning assembly, so that the mandrel 21 and the movable member 12 are relatively fixed, and when the bumping mode needs to be entered, only the positioning assembly needs to be controlled, so that the engaging piece 81 is separated from the engaging tooth 8, and the operation is simple and easy to realize.

In one embodiment, the positioning assembly includes:

the rotating shaft 9 is rotatably connected in the first mounting groove 32;

the cam 91 is fixedly arranged on the rotating shaft 9;

the limiting shaft 92, the limiting shaft 92 is fixedly arranged in the first mounting groove 32;

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 member 12, and the other extending end of the second torsion spring 93 abuts against the outer side of the engaging piece 81, so as to drive one extending end of the engaging piece 81 to abut against the side surface of the cam 91 all the time.

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

When getting into smooth-going mode from the mode of jolting, the user of riding rotates second rotating handle 103, drives pivot 9, cam 91 and rotates, and the most advanced extrusion meshing piece 81 of cam 91 corresponds extends the end, and then drives meshing piece 81 and the separation of rodent 8, that is to say, dabber 21 is not held tightly this moment, so one-way resistance inefficacy, wherein, because the existence of second torsional spring 93 for cam 91 can keep the contact state with meshing piece 81 always, thereby play spacing effect to cam 91.

When the damping device enters a bumping mode from a smooth mode, the rotating shaft 9 is rotated reversely to drive the cam 91 to rotate, the engaging piece 81 moves from being tightly abutted to the tip of the cam 91 (the end of the cam 91, which is the shortest from the rotating axis), to being tightly abutted to the non-tip of the cam 91 (the end of the cam 91, which is the non-shortest from the rotating axis) under the action of the second torsion spring 93, at the moment, the engaging piece 81 rotates with the mounting seat 10 until being engaged with the engaging tooth 8, namely, the mandrel 21 is tightly held at the moment, and the one-way damping part 2 and the P joint seat 3 are fixed, so that the one-way damping effect is realized.

In the embodiment, the limiting shaft 92 is fixedly disposed on the mounting base 10, and since the second torsion spring 93 has a better elastic deformation capability, an extending end of the engaging piece 81 can be continuously abutted against the peripheral side of the cam 91.

An embodiment of the present invention further provides a bicycle, including bicycle body and as described above the damping type rear derailleur, the damping type rear derailleur is installed on the bicycle body (not shown).

Because the rear derailleur of this application is simple structure and compact for the rear derailleur of this application has higher suitability and practicality.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to 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 damping part (2), a P joint seat (3) and a main shaft (4), one end of the main shaft (4) is fixedly connected with one end of the chain guide component (13), the other end of the main shaft is coaxially arranged in the P joint seat (3) in a penetrating mode, the one-way damping part (2) comprises a mandrel (21) and a rolling part (22), the mandrel (21) is connected with the P joint seat (3), and the rolling part (22) is connected with the other end of the main shaft (4) in a sliding mode and can abut against the outer peripheral side of the mandrel (21);

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), a rotary groove (41) for embedding one end of the mandrel (21) is formed in the free end of the main shaft (4), and special-shaped sliding grooves (42) are formed in the inner side wall of the rotary groove (41) at intervals;

the rolling part (22) comprises a roller (23) or a rolling ball which is connected to the special-shaped sliding groove (42) in a sliding mode, and a homing part (24) which is installed in the special-shaped sliding groove (42) and is abutted to the roller (23) or the rolling ball, the homing part (24) is used for driving the roller (23) or the rolling ball to abut against a first position (45) of the special-shaped sliding groove (42), and when the main shaft (4) rotates along a second direction, friction force is generated between the rolling part (22) and the mandrel (21).

3. The damped rear derailleur according to claim 2, wherein: dysmorphism spout (42) include with special-shaped portion (421) of gyration groove (41) inside wall intercommunication, with installation department (422) of special-shaped portion (421) one side intercommunication, return piece (24) including inlaying locate installation piece (25) in installation department (422), set firmly in conflict piece (26) of installation piece (25) one end, conflict piece (26) towards keeping away from the direction of installation department (422) and outwards extending set up, the free end of conflict piece (26) with roller (23) or spin are contradicted.

4. The damped rear derailleur according to claim 2, wherein: the main shaft (4) comprises a main joint column (43) and an auxiliary joint column (44) which are coaxially and fixedly arranged, one end of the main joint column (43) is fixedly connected with one end of the chain guide member (13), the other end of the main joint column is fixedly connected with the auxiliary joint column (44) after penetrating through the P joint seat (3), the special-shaped sliding groove (42) and the rotary groove (41) are both arranged on the auxiliary joint column (44), the outer diameter of the auxiliary joint column (44) is 16-18 mm, and the inner diameter of the main joint column (43) is 7.5-8.5 mm.

5. The damped rear derailleur according to claim 2, wherein: the main shaft (4) is made of an iron-based powder metallurgy material.

6. The damped rear derailleur according to any one of claims 2-5, 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.

7. The damped rear derailleur according to claim 6, 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;

a control element (52), wherein the control element (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);

first mounting groove (32) inside wall interval in proper order is provided with first spacing groove (33), second spacing groove (34), control (52) include:

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).

8. The damped rear derailleur according to claim 7, wherein:

the switch shaft (53) comprises a first cylindrical part (6) and a second cylindrical part (61) which are connected, wherein a gap is formed in the outer side of the first cylindrical part, 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);

the elastic reset 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 is abutted to one side, away from the abutting part (64), of the flange (65).

9. The damped rear derailleur according to claim 6, 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);

the positioning assembly comprises:

the rotating shaft (9), the rotating shaft (9) is connected to the mounting seat (10) in a rotating mode;

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 engaging piece (81), and the second torsion spring is used for driving one extending end of the engaging 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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