TWI705026B - Bicycle derailleur - Google Patents

Abstract

The invention relates to a bicycle derailleur, which includes a main body, a chain guiding member and a resistance mechanism and a first stopping member. The chain guiding member and the resistance mechanism are disposed on the main body. The resistance mechanism can change a resistance torque to the chain guiding member.

Description

Bicycle derailleur

The invention relates to a bicycle derailleur.

The transmission system is one of the core mechanisms of the bicycle, among which the derailleur used for speed change is an important structure. The derailleur drives the chain from one sprocket to a sprocket of another size through the relative swing of the chain guide, thereby achieving the purpose of shifting. At the same time, from the side view of the derailleur installed on the hub, the chain guide is normally subjected to a clockwise force to stretch the chain, so that the chain can be maintained at a proper tension to avoid unsmooth operation or chain loss. It happened.

However, in such a conventional derailleur, the resistance mechanism used to provide a clockwise force to the chain guide usually has a constant resistance torque and cannot be adjusted. Therefore, once riding on a rough road with large slope changes, the force generated by the chain vibration will be greater than the resistance torque provided by the resistance mechanism. At this time, the chain guide will swing in the opposite direction, causing the chain to relax. , Insufficient tension, chain drop occurs, seriously endangering the safety of riders, and there are defects that need to be improved urgently.

Therefore, it is necessary to provide a novel and progressive bicycle derailleur to solve the above-mentioned problems.

The main purpose of the present invention is to provide a bicycle derailleur. The rider can change the resistance torque provided by the resistance mechanism to the chain guide according to the section of the road he wants to ride.

To achieve the above objective, the present invention provides a bicycle derailleur, which includes a body, a chain guide, a resistance mechanism, and a first stopper. The chain guide is swingably arranged on the body. The resistance mechanism includes a resistance element and an adjustment member. The adjustment member is pivoted on the body and can be rotated between a first position and a second position. Both ends of the resistance element are respectively provided on the chain guide and The adjusting member causes the resistance element to apply a resistance torque to the chain guide member and causes the adjusting member to have a tendency to rotate toward the first position. The resistance when the adjusting member moves from the first position to the second position Moment is getting bigger. The first stopper is arranged on the body and can move at a release position and a stop position. Wherein, when the first stopper is located in the stop position, the first stopper interferes with the rotation path of the adjustment member between the first position and the second position; when the first stopper When in the release position, the first stopper does not interfere with the rotation path of the adjustment member between the first position and the second position.

The following examples are only used to illustrate the possible implementation aspects of the present invention, but they are not intended to limit the scope of protection of the present invention, and are described first.

Please refer to FIGS. 1 to 9, which show a preferred embodiment of the present invention. The bicycle derailleur of the present invention includes a main body 1, a chain guide member 2, a resistance mechanism 4 and a first stop member 51.

The chain guide 2 is swingably disposed on the body 1. In this embodiment, the chain guide 2 is provided with a plurality of guide wheels 21, and the plurality of guide wheels 21 are engaged by a chain 6 to pull the chain 6.

The resistance mechanism 4 includes a resistance element 41 and an adjustment member 42 which is pivotally mounted on the main body 1 and can rotate between a first position and a second position. Both ends of the resistance element 41 are respectively provided On the chain guide member 2 and the adjusting member 42, the resistance element 41 applies a resistance torque to the chain guide member 2 and the adjusting member 42 has a tendency to rotate toward the first position. The adjusting member 42 moves from the When the first position moves toward the second position, the resistance torque gradually increases.

The first stopper 51 is disposed on the main body 1 and can move in a release position and a stop position.

Wherein, when the first stopper 51 is at the stop position, the first stopper 51 interferes with the rotation path of the adjustment member 42 between the first position and the second position; when the first stopper 51 When the stopper 51 is located in the release position, the first stopper 51 does not interfere with the rotation path of the adjustment member 42 between the first position and the second position. Therefore, when the adjusting member 42 is located at the first position, the resistance torque is at a minimum state, when the adjusting member 42 is rotated to the second position, the resistance torque is at a maximum state, and when the adjusting member 42 moves from the second position When the position rebounds toward the first position and the first stopper 51 is located at the stop position, the adjustment member 42 is restricted by the interference of the first stopper 51 and cannot return to the first position. Therefore, the The resistance torque is greater than the state where the adjusting member 42 is located at the first position. In this embodiment, the direction of the resistance moment provided by the resistance element 41 to the chain guide 2 is clockwise, and the bias force generated by the resistance moment can stably support the chain guide 2 so that the chain guide 2 It can maintain the chain 6 at a specific position so that the chain 6 maintains sufficient tension and can run smoothly. In short, the resistance torque generated by the resistance element 41 is sufficient to allow the chain guide 2 to effectively resist the reverse oscillating force generated during riding to ensure riding safety, so that the rider can follow the riding section The adjusting member 42 adjusts the resistance moment. When riding on a relatively stable road section, the rider can position the adjusting member 42 at the first position, and when riding on a road section with a large gradient, Alternatively, the adjusting member 42 can be adjusted to the second position so that the adjusting member 42 abuts against the first stop member 51 during the rebound rotation, so as to provide a larger moment to the chain guide 2.

Preferably, the bicycle derailleur further includes a release assembly 5, and the release assembly 5 includes an elastic member 52. One end of the elastic member 52 is provided on the body 1, and the other end is provided on the first stopper 51. So that the first stopper 51 has a tendency to move toward the stop position. In this embodiment, the release assembly 5 further includes a flipping member 53 and a shaft 54 rotatably passing through the main body 1, the flipping member 53 and the shaft 54 are integrally connected, the shaft The body 54 is further assembled with the first stopper 51 in the same rotation. When the adjustment member 42 abuts against the first stopper 51 in the rebound rotation, the triggering member 53 can be pulled When the first stopper 51 moves toward the release position, the adjustment member 42 can be reset to the first position, which makes the operation more convenient.

Specifically, the main body 1 is provided with an arc-shaped communicating groove 13 which is coaxially arranged with the adjusting member 42, and one end of the resistance element 41 is positioned on the adjusting member 42 by passing through the communicating groove 13 , So that the adjusting member 42 drives the resistance element 41 to twist. Preferably, the adjusting member 42 protrudes with a protrusion 423, the protrusion 423 is inserted into the communicating groove 13, and one end of the resistance element 41 is inserted into the protrusion 423; wherein, the protrusion 423 is defined to move in the communicating groove 13 One end of the slot 13 is the first position, and the other end is the second position. The position where the protrusion 423 abuts the first stopper 51 is located between the first position and the second position. That is to say, the adjusting member 42 can have a larger rotation margin to be suitable for different usage requirements. For example, the user can change the first stopper 51 of different styles to change the adjusting member 42 against the top. At the position of the first stopper 51, the magnitude of the resistance torque, the rotation angle of the adjusting member 42 and the movement path length of the protruding post 423 will all change, and the longer communicating groove 13 can provide More margin space to meet the above adjustment.

Furthermore, the adjusting member 42 is radially protruding with an abutting portion 421. When the first stopping member 51 is located at the stopping position and the adjusting member 42 rotates, the swing path of the abutting portion 421 and the first The stopper 51 interferes, and the main body 1 is additionally positioned with a second stopper 12. When the adjusting member 42 rotates to the first position, the abutting portion 421 abuts against the second stopper 12. In this embodiment, the second stopper 12 includes a block 121 and a metal covering member 122. The block 121 integrally extends to the body 1, and the metal covering 122 covers the block 121. When the adjusting member 42 is in the first position, the abutting portion 421 abuts against the metal covering member 122 to protect the block 121 and prevent the block 121 from being damaged by the abutting portion 421 for a long time. .

The first stopper 51 includes a first arc segment 511, and the abutment portion 421 includes a second arc segment 422. When the first stopper 51 is located at the stop position and the adjusting element 42 is removed from the When a position rotates to the second position, the first arc segment 511 abuts against the second arc segment 422, and in this state, the second arc segment 422 pushes against the first arc segment 511. When the first stopper 51 is gradually moved to the release position, the adjustment member 42 can be smoothly rotated to the second position; when the first stopper 51 is at the stop position and the adjustment member 42 is moved from the When the second position rotates toward the first position, the first arc segment 511 abuts against the second arc segment 422. In this state, when the first stopper 51 is controlled by the outside, it gradually moves to the When the position is released, the first arc segment 511 pushes against the second arc segment 422 and relatively slides to escape each other.

It is worth mentioning that the main body 1 is rotatably provided with a mandrel 14 which is fixedly connected to the chain guide member 2, and the adjusting member 42 is provided with a set of holes 424 along the axial direction. The adjusting member 42 is sleeved on the mandrel 14 through the sleeve hole 424, and the adjusting member 42 is further penetrated transversely and axially with an assembly hole 425 communicating with the sleeve hole 424, and the mandrel 14 is away from the chain guide 2 One end is recessed with a ring groove 141, and a pin 43 penetrates the assembly hole 425 and is clamped in the ring groove 141 so that the adjusting member 42 can rotate relative to the spindle 14 without leaving the center.轴14.

Preferably, the main body 1 is further provided with a third stopper 16, when the first stopper 51 is located at the stop position, the first stopper 51 abuts against the third stopper 16. To position the first stopper 51 at the stop position, the second stopper 12 and the third stopper 16 are integrally formed on one side of the body 1, and the metal cladding 122 can be The disassembled cover is covered on the second stopper 12 to facilitate replacement. The adjusting member 42 further includes a first member 44 and a second member 45. The first member 44 protrudes from the second member 45 in the axial direction. The second member 45 is provided with the abutting portion 421 and the protrusion. Column 423, the first member 44 is provided with a non-circular driving portion 46, and a tool can be inserted into the driving portion 46 to drive the adjusting member 42 to rotate, so as to achieve a labor saving effect. The elastic member 52 is a torsion spring and is sleeved on the shaft 54. The main body 1 is provided with a plurality of positioning holes 15 which surround the shaft 54 at intervals. One end of the elastic member 52 can be selectively inserted into A positioning hole 15, the elastic member 52 can generate different elastic force to the first stopper 51, so that the first stopper 51 can have different moving speeds, so as to interact with the adjustment member 42 co-operate.

In this embodiment, the first stopper 51, the adjustment member 42, the second stopper 12, and the third stopper 16 are located on one side of the body 1, and the chain guide 2 is located on the body 1. The other side further includes a cover 7 which is disposed on the side of the main body 1 away from the chain guide 2, and the cover 7 is penetrated with an opening 71, and the driving portion 46 corresponds to the A hole 71 is opened to facilitate the insertion of a tool into the driving portion 46; it should be noted that in this embodiment, one side of the cover 7 is installed along the axial direction, and the resistance element 41 enables the adjustment member 42 to have The tendency to turn counterclockwise.

In summary, the bicycle derailleur of the present invention can change the resistance torque to the derailleur. The rider can select an appropriate resistance torque according to the pre-riding section, so that the derailleur can be stably maintained in a fixed position to ensure that The tension of the chain will not cause the chain to fall unexpectedly due to external forces such as shaking and vibration during riding.

1: body

2: chain guide

4: Resistance mechanism

5: Release components

6: chain

7: Lid

12: The second stop

13: Connecting groove

14: Mandrel

15: positioning hole

16: the third stop

121: Block

122: metal clad parts

141: Ring groove

21: Guide wheel

41: Resistance element

42: adjustment piece

43: Pin

44: The first part

45: second part

46: Drive

421: reach the top

422: second arc segment

423: convex column

424: set hole

425: assembly hole

51: first stop

52: Elastic

53: flip piece

54: Shaft

511: first arc segment

71: Opening

Figure 1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is an exploded view of a preferred embodiment of the present invention. Figure 3 is a partial cross-sectional perspective view of a preferred embodiment of the present invention. 4 is a schematic diagram of the adjusting member in the first position of a preferred embodiment of the present invention. FIG. 5 is a schematic diagram of the adjusting member rotating toward the second position of a preferred embodiment of the present invention. FIG. 6 is a schematic diagram of the adjusting member rotating to the second position in a preferred embodiment of the present invention. FIG. 7 is a schematic diagram of a preferred embodiment of the present invention when the adjusting member is pressed against the first stopper. FIG. 8 is a schematic diagram of the adjusting member moving to the first position in a preferred embodiment of the present invention. Fig. 9 is a use state diagram of an embodiment of the present invention.

1: body

2: chain guide

4: Resistance mechanism

5: Release components

7: Lid

21: Guide wheel

Claims (9)

A bicycle derailleur, comprising: a body; a chain guide piece swayably arranged on the body; a resistance mechanism, comprising a resistance element and an adjusting piece, the adjusting piece is pivoted on the body and can be rotated on a Between the first position and the second position, the two ends of the resistance element are respectively arranged on the chain guide and the adjusting element, so that the resistance element applies a resistance torque to the chain guide and the adjusting element has an orientation The tendency of the first position to rotate, the resistance torque gradually increases when the adjusting member moves from the first position to the second position; a first stopper is provided on the body and can move at a release position and a stop Stop position; wherein, when the first stopper is in the stop position, the first stopper interferes with the rotation path of the adjustment member between the first position and the second position; when the first stop When the stopper is located in the release position, the first stopper does not interfere with the rotation path of the adjustment member between the first position and the second position; wherein, a release component is further included, and the release component includes An elastic piece, one end of the elastic piece is arranged on the body, and the other end is arranged on the first stopper, so that the first stopper has a tendency to move toward the stop position. The bicycle derailleur according to claim 1, wherein the release assembly further includes a pull member and a shaft body, the shaft body rotatably penetrates the body, the pull member and the shaft body are integrally connected, the The shaft body and the first stopper are assembled in the same rotation. The bicycle derailleur according to claim 1, wherein the adjusting member radially protrudes with an abutting top, and when the first stopping member is located at the stopping position and the adjusting member rotates, the swing path of the abutting top Interfering with the first stopper, the main body is further positioned with a second stopper, and when the adjusting member rotates to the first position, the abutting portion abuts against the second stopper. The bicycle derailleur according to claim 3, wherein the second stopper includes a block body and a metal covering element, the block body integrally extends to the body, and the metal covering element covers the block body, When the adjusting member is at the first position, the abutting portion abuts against the metal clad member. The bicycle derailleur according to claim 3, wherein the first stopper includes a first arc segment, and the abutment portion includes a second arc segment, when the first stopper is located at the stop position And when the adjusting member rotates from the first position to the second position, the first arc segment abuts against the second arc segment, and in this state, the second arc segment pushes against the first circle When the first stopper gradually moves to the release position due to the arc section, the adjustment member can be smoothly rotated to the second position; when the first stopper is located at the stop position and the adjustment member starts from the first position When the second position rotates toward the first position, the first arc segment abuts against the second arc segment. In this state, when the first stopper is gradually moved to the release position under the control of the outside world, The first arc segment pushes against the second arc segment and slides relatively to break away from each other. The bicycle derailleur according to claim 1, wherein the body is provided with an arc-shaped communicating groove, the communicating groove is arranged coaxially with the adjusting member, and one end of the resistance element is positioned in the communicating groove through the communicating groove. Adjustment pieces. The bicycle derailleur according to claim 6, wherein the adjusting member protrudes with a protrusion, the protrusion is inserted into the communicating groove, and one end of the resistance element is inserted into the protrusion; wherein the protrusion is defined to move One end of the communicating groove is the first position, and the other end is the second position. The position where the protruding column abuts against the first stopper is located between the first position and the second position. The bicycle derailleur according to claim 1, wherein the main body is further rotatably provided with a mandrel, the mandrel is fixedly connected to the chain guide, and the adjusting member is provided with a set of holes along the axial direction, The adjusting member is sleeved on the mandrel through the sleeve hole, the adjusting member is further provided with an assembly hole communicating with the sleeve hole in the transverse direction and the axial direction, and an end of the mandrel away from the chain guide is recessed with a ring recess A groove, a pin part penetrates the assembly hole and is clamped to the ring groove so that the adjustment part can rotate relative to the spindle. According to the bicycle derailleur according to claim 5, the release assembly further includes a puller and a shaft, the shaft rotatably penetrates the body, the puller and the shaft are integrally connected, the shaft The body and the first stopper are assembled in the same rotation; the second stopper includes a body and a metal covering part, the block body integrally extends to the body, and the metal covering part covers the block Body, when the adjusting member is in the first position, the abutting top abuts against the metal clad member; the body is provided with an arc-shaped communicating groove which is coaxially arranged with the adjusting member, and the resistance element One end is positioned on the adjusting member by penetrating the communicating groove; the adjusting member protrudes with a protruding post, the protruding post is inserted into the communicating groove, and one end of the resistance element is inserted into the protruding post; wherein, the protruding post is defined to move One end of the communicating groove is the first position, and the other end is the second position. The position where the protrusion abuts the first stopper is located between the first position and the second position; the body is further A mandrel is rotatably penetrated, and the mandrel is fixedly connected to the chain guide member, the adjustment member is provided with a set of holes along the axial direction, and the adjustment member is sleeved on the mandrel through the set of holes. The adjusting member is further provided with an assembly hole communicating with the sleeve in the axial direction, a ring groove is recessed at one end of the mandrel away from the chain guide, and a pin is inserted through the assembly hole and is clamped against the Ring groove so that the adjusting member can rotate relative to the mandrel; the body is further provided with a third stopper, when the first stopper is at the stop position, the first stopper abuts against the The third stopper, the second stopper and the third stopper are integrally formed on one side of the body, and the metal covering piece is detachably covered on the second stopper; the adjustment piece is further It includes a first part and a second part, the first part protrudes from the second part along the axial direction, the second part is provided with the abutting top and the protruding column, and the first part is provided with a non-circular shape The driving part; the chain guide is provided with a plurality of guide wheels, the plurality of guide wheels for a chain to engage; the elastic member is a torsion spring and sleeved on the shaft body, the body is provided with a plurality of positioning holes, the plurality of positioning holes interval Surrounding the shaft, one end of the elastic member can be selectively inserted into the positioning hole; the first stopper, the adjustment member, the second stopper, and the third stopper are located on one of the main bodies Side, the chain guide is located on the other side of the main body, and further includes a cover, the cover is arranged on the side of the main body away from the chain guide, the cover is penetrated with an opening, and the driving part corresponds to For that Open a hole; to install the cover on one side of the view along the axial direction, the resistance element makes the adjustment member have a tendency to rotate counterclockwise.

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