CN217260535U

CN217260535U - Bicycle speed variator

Info

Publication number: CN217260535U
Application number: CN202221040030.1U
Authority: CN
Inventors: 彭国鹏; 钱后平
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-30
Filing date: 2022-04-30
Publication date: 2022-08-23
Anticipated expiration: 2032-04-30

Abstract

The utility model relates to a bicycle speed changer, including first main part, with the second main part of first main part activity hookup, rotate the chain guide of installing on the second main part, the axis of rotation, first elastic element, and resistance generating device, make the chain guide keep the pivoted trend in first direction of rotation in order to with the chain tensioning through first elastic element, the chain guide can drive resistance generating device when jolting and vibrating and rotate along the second direction of rotation, resistance generating device can produce the resistance to second main part this moment, consequently, can increase the tensile force of chain, effectually prevent that the chain from breaking away from the gear train, and it is more steady to shift gears, it is accurate, the structure has been simplified greatly simultaneously.

Description

Bicycle speed variator

[ technical field ] A method for producing a semiconductor device

The utility model relates to a bicycle derailleur.

[ background of the invention ]

In a bicycle transmission, shifting is achieved by shifting a chain to gear sets of different diameters. During the shift adjustment process, the chain exhibits a change in tightness as it switches between gear sets of different diameters, due to the fixed length of the chain. In order to ensure that the chain is always in a proper tension state during the shifting process, the chain is tensioned by a chain guide arranged in the rear derailleur in the bicycle shifting device, the chain is wound around a tension wheel arranged on the chain guide, a torsion spring for generating torsion force is arranged between the chain guide and the second main body piece, and the elasticity of the torsion spring prompts the chain guide to rotate along a first rotating direction to tension the chain; when the chain is switched between different gear sets, if the chain becomes loose, the chain guide is rotated by a certain angle in the first rotational direction under the action of the spring to tension the chain.

However, in the process of riding the bicycle, because there is a gap between the chain and the gear set or the bumpiness of the road can cause jolting and vibration, the inertia in the process of jolting and vibration can make the chain guide overcome the elasticity of the spring and rotate towards the second rotation direction, and the chain is loosened in the process, so that the chain is easy to fall off, the riding safety is affected, and meanwhile, when the gear is shifted towards the first rotation direction, the problems of unstable gear shifting or inaccurate noise generation and the like can be caused.

[ Utility model ] content

The utility model provides a can guarantee that the chain can not break away from the gear train, shift steady, accurate and simple structure, with low costs bicycle derailleur.

The utility model discloses realized by following technical scheme:

a bicycle shifter, comprising:

a first body member for mounting on a bicycle frame;

the second main body piece is movably connected with the first main body piece;

a chain guide rotatably mounted on the second body member, the chain guide being rotatable relative to the second body member in a first rotational direction or a second rotational direction, the second rotational direction being opposite the first rotational direction;

one end of the rotating shaft is connected with the chain guide piece, and the other end of the rotating shaft is rotatably arranged in the second main body piece in a penetrating way and used for enabling the chain guide piece to be rotatably arranged on the second main body piece;

a first resilient element provided between the second body member and the chain guide for maintaining the tendency of the chain guide to rotate in a first rotational direction;

and the resistance generating device is arranged in the second main body part and is used for generating resistance with the second main body part when rotating along the second rotating direction, and the resistance generating device comprises a resistance seat, an elastic element prepressing part, a second elastic element and a one-way bearing, wherein the resistance seat, the elastic element prepressing part, the second elastic element and the one-way bearing are axially and movably arranged on the second main body part along the rotating shaft.

As mentioned above, the one-way bearing is sleeved on the rotating shaft and the free rotation direction is the same as the first rotation direction, and the resistance seat can rotate along with the rotation of the one-way bearing along the second rotation direction; the elastic element prepressing piece is arranged at one end of the rotating shaft far away from the chain guide piece; the second elastic element is arranged between the resistance seat and the elastic element prepressing piece and used for pushing the resistance seat to move along the direction far away from the elastic element prepressing piece so as to ensure that the end face of the resistance seat far away from the elastic element prepressing piece keeps the trend of abutting against the second main body piece.

As mentioned above, the end surface of the resistance seat away from the elastic element pre-pressing piece is provided with the first tooth-shaped structure, the second main body piece is provided with the second tooth-shaped structure matched with the first tooth-shaped structure, and when the rotating shaft drives the one-way bearing and the resistance seat to rotate along the second rotating direction, the second tooth-shaped structure is matched with the first tooth-shaped structure so as to push the resistance seat to the direction close to the elastic element pre-pressing piece until the second tooth-shaped structure is separated from the first tooth-shaped structure, and the second elastic element pushes the resistance seat to the first tooth-shaped structure to be matched with the second tooth-shaped structure again.

As the bicycle speed changer is characterized in that the first bushing is arranged between the one-way bearing and the rotating shaft, and the resistance seat drives the first bushing and the one-way bearing to axially move along the rotating shaft when axially moving along the rotating shaft.

As mentioned above, the bicycle speed changer is provided with the first rotation limiting structure used for limiting the relative rotation of the first bushing and the rotating shaft between the first bushing and the rotating shaft.

As mentioned above, the bicycle speed changer is provided with the second bush between the one-way bearing and the resistance seat, the one-way bearing drives the second bush and the resistance seat to rotate when rotating around the rotating shaft, and the resistance seat moves axially along the rotating shaft relative to the second bush.

As the bicycle speed changer is arranged, the second rotation limiting structure used for limiting the relative rotation of the resistance seat and the resistance seat is arranged between the second bushing and the resistance seat.

In the bicycle derailleur, the chain guide includes a first guide plate, a second guide plate, a guide pulley, and a tension pulley, the guide pulley and the tension pulley are respectively hinged between the first guide plate and the second guide plate, and one end of the first guide plate close to the guide pulley is rotatably mounted on the second body member through a rotating shaft.

As above the bicycle derailleur, the end cover is installed in the last rotation of second main part, one side that the second main part is close to the end cover is equipped with the annular mounting groove that can supply first elastic element cover to establish, first elastic element is the torsional spring, and its one end stretches into in the annular mounting groove and is connected with second main part, and the other end stretches out the annular mounting groove and is connected with the chain guide.

As the bicycle speed changer, one side of the end cover, which is far away from the second main body part, is provided with the positioning groove for positioning the first guide plate, and the first guide plate is connected with the rotating shaft through the first bolt.

Compared with the prior art, the utility model discloses there is following advantage:

the utility model provides a bicycle speed changer, which comprises a first main body piece arranged on a bicycle frame, a second main body piece movably connected with the first main body piece, a chain guide piece rotatably arranged on the second main body piece, a rotating shaft used for enabling the chain guide piece to be rotatably arranged on the second main body piece, a first elastic element used for enabling the chain guide piece to keep the trend of rotating in a first rotating direction, and a resistance generating device used for generating resistance between the chain guide piece and the second main body piece when rotating in a second rotating direction, wherein the chain guide piece keeps the trend of rotating in the first rotating direction through the first elastic element so as to tension a chain, the chain guide piece can drive the resistance generating device to rotate in the second rotating direction when jolting and vibrating, at the moment, the resistance generating device can generate resistance to the second main body piece, thereby increasing the tension force of the chain, the chain is effectively prevented from being separated from the gear set, the gear shifting is more stable and accurate, and the structure is greatly simplified;

the resistance generating device comprises a resistance seat, an elastic element prepressing piece and a second elastic element, wherein when the one-way bearing rotates in a second rotating direction, the one-way bearing can drive the resistance seat to rotate, friction force can be generated between the resistance seat and a second main body piece in the rotating process of the resistance seat, meanwhile, the resistance seat can generate friction force when moving along the axial direction of a rotating shaft, and the resistance seat is pushed and pressed by the second elastic element to move along the direction far away from the elastic element prepressing piece, so that the end face, far away from the elastic element prepressing piece, of the resistance seat keeps the trend of abutting contact with the second main body piece, the pushing and pressing force of the second elastic element needs to be overcome, the resistance generating device is simple in structure, few in parts and short in axial arrangement distance, the resistance generating device is more harmonious when being installed on a bicycle, and the influence on attractiveness and easy touch caused by excessive outward protrusion are avoided;

in addition, through setting up in the first dentate structure and the second dentate structure of resistance seat and second main part spare, one-way bearing when the second direction of rotation rotates, can drive the inclined plane of the first dentate structure of resistance seat and the inclined plane relative movement of the second dentate structure of second main part spare and produce frictional force, further increase one-way bearing and rotate the resistance of direction pivoted at the second, more can guarantee that the chain breaks away from the gear train, simple structure moreover does benefit to popularization and application.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic sectional structure diagram of embodiment 1 of the present invention;

fig. 3 is a schematic sectional structure diagram of embodiment 2 of the present invention;

fig. 4 is a schematic sectional exploded view of embodiment 2 of the present invention;

fig. 5 is a schematic sectional partial structure diagram of embodiment 2 of the present invention;

fig. 6 is a schematic cross-sectional structure diagram of embodiment 3 of the present invention;

fig. 7 is a schematic sectional exploded view of embodiment 3 of the present invention;

fig. 8 is a schematic sectional partial structure diagram of embodiment 3 of the present invention.

[ detailed description ] embodiments

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

When embodiments of the present invention refer to "first", "second", etc. ordinal terms, it should be understood that they are used for distinguishing purposes only, unless the context clearly dictates otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Detailed description of the preferred embodimentsthe bicycle derailleur illustrated in fig. 1-8 comprises a first body member 1 for mounting to a bicycle frame, a second body member 2 movably coupled to the first body member 1, a chain guide 3 rotatably mounted to the second body member 2, a rotating shaft 4, a first resilient element 5, and a resistance generating device 7 disposed within the second body member 2. The chain guide 3 is rotatable relative to the second body member 2 in either a first rotational direction or a second rotational direction, which is opposite to the first rotational direction; one end of the rotating shaft 4 is connected with the chain guide 3, and the other end of the rotating shaft is rotatably arranged in the second main body piece 2 in a penetrating way and is used for enabling the chain guide 3 to be rotatably arranged on the second main body piece 2; the first elastic element 5 is provided between the second body member 2 and the chain guide 3 for maintaining the tendency of the chain guide 3 to rotate in the first rotational direction; the resistance generating device 7 is used for generating resistance with the second main body piece when rotating along the second rotating direction. Specifically, the resistance force generation device 7 includes a resistance seat 71, an elastic element pre-pressing member 72, a second elastic element 73, and a one-way bearing 74. Make chain guide 3 keep in the pivoted trend in first direction of rotation in order to tension the chain through first elastic element 5, chain guide 3 can drive one-way bearing 74 when jolting and vibrating and rotate along the second direction of rotation, one-way bearing 74 drives resistance seat 7 and rotates along the second direction of rotation, resistance seat 7 can produce the resistance to second main part 2 this moment, consequently, can increase the tensile force of chain, the effectual chain that prevents breaks away from the gear train, and it is more steady, and accurate to shift, the structure has been simplified greatly simultaneously.

More specifically, the one-way bearing 74 is sleeved on the rotating shaft 4 and the free rotation direction is the same as the first rotation direction; the resistance seat 71 is movably arranged on the second main body part 2 along the axial direction of the rotating shaft 4 and can rotate along with the rotation of the one-way bearing 74 in the second rotating direction; the elastic element presser 72 is rotatably provided at an end of the rotating shaft 4 remote from the chain guide 3; the second elastic member 73 is provided between the resistance holder 71 and the elastic member presser 72, and is used for pushing the resistance holder 71 to move in a direction away from the elastic member presser 72, so that the end face of the resistance holder 71 away from the elastic member presser 72 tends to be kept in abutting contact with the second body member 2. When the one-way bearing 74 rotates in the second rotation direction, the one-way bearing 71 is driven to rotate, a friction force is generated between the resistance seat 71 and the second main body 2 in the rotation process of the resistance seat 71, meanwhile, the resistance seat 71 also generates a friction force when moving axially along the rotation shaft 4, and the resistance seat 71 is pushed by the second elastic element 73 to move in the direction away from the elastic element pre-pressing piece 72, so that the end face, away from the elastic element pre-pressing piece 72, of the resistance seat 71 tends to be in contact with the second main body 2 in a propping manner, and the pushing force of the second elastic element 73 needs to be overcome.

In addition, the end surface of the resistance seat 71 away from the elastic element pre-pressing piece 72 is provided with a first toothed structure 101, the second body 2 is provided with a second toothed structure 102 engaged with the first toothed structure 101, when the rotating shaft 4 drives the one-way bearing 74 and the resistance seat 71 to rotate along the second rotating direction, the second toothed structure 102 is engaged with the first toothed structure 101 to push the resistance seat 71 towards the elastic element pre-pressing piece 72 until the second toothed structure 102 is disengaged from the first toothed structure 101, and the second elastic element 73 pushes the resistance seat 71 until the first toothed structure 101 and the second toothed structure 102 are engaged again. Through the first tooth-shaped structure 101 and the second tooth-shaped structure 102 disposed on the resistance seat 71 and the second body 2, when the resistance seat 71 rotates along the first rotation direction, the first tooth-shaped structure 101 is engaged with the second tooth-shaped structure 102, and when the one-way bearing 74 rotates along the second rotation direction, the first tooth-shaped structure 101 of the resistance seat 71 is gradually separated from the second tooth-shaped structure 102, and in the process that the first tooth-shaped structure 101 is gradually separated from the second tooth-shaped structure 102, the inclined surface of the first tooth-shaped structure 101 and the inclined surface of the second tooth-shaped structure 102 of the second body 2 move relatively to generate a friction force, when the second tooth-shaped structure 102 is completely separated from the first tooth-shaped structure 101, the first tooth-shaped structure 101 is re-engaged into the second tooth-shaped structure 102 through the second elastic element 73, the resistance seat 71 rotates relative to the second body 2 to generate a friction force, so as to further increase the resistance of the rotation of the one-way bearing 74 in the second rotation direction, the chain can be ensured to be separated from the gear set, and the structure is not required to be simple, thereby being beneficial to popularization and application.

Specifically, the chain guide 3 includes a first guide plate 31, a second guide plate 32, a guide pulley 33, and a tension pulley 34, the guide pulley 33 and the tension pulley 34 are respectively hinged between the first guide plate 31 and the second guide plate 32, and one end of the first guide plate 31 near the guide pulley 33 is rotatably mounted on the second body member 2 through a rotating shaft 4.

Further, rotate on the second main part 2 and install end cover 6, one side that second main part 2 is close to end cover 6 is equipped with the annular mounting groove 211 that can supply 5 covers of first elastic element to establish, first elastic element 5 is the torsional spring, and its one end stretches into annular mounting groove 211 and is connected with second main part 2, and the other end stretches out annular mounting groove 211 and is connected with chain guide 3. In addition, a positioning groove 61 for the first guide plate 31 to be embedded is arranged on one side of the end cover 6 away from the second body member 2, and the first guide plate 31 is connected with the rotating shaft 4 through a first bolt 10. The positioning slot 221 is provided to facilitate the installation of the first guide plate 31 in place. Meanwhile, the first guide plate 31 can be directly fixed on the end cover 6 by using a positioning column.

Still further, still include first articulated elements 81, second articulated elements 82 and elastic connecting piece 83, first articulated elements 81 one end is articulated with first main part 1, and the other end is articulated with second main part 2, second articulated elements 82 one end is articulated with first main part 1, and the other end is articulated with second main part 2, first main part 1, second main part 2, first articulated elements 81 and second articulated elements 82 constitute four-bar linkage jointly to make second main part 2 can be along axis of rotation 4 axial displacement relative to first main part 1, elastic connecting piece 83 one end is connected with first main part 1, and the other end is connected with second main part 2. The second body member 2 is biased laterally outwardly by the resilient connection 83.

Embodiment 2, this embodiment is substantially the same as embodiment 1, except that a first bushing 91 is disposed between the one-way bearing 74 and the rotating shaft 4, and the resistance seat 71 drives the first bushing 91 and the one-way bearing 74 to move axially along the rotating shaft 4 when moving axially along the rotating shaft 4. Specifically, a first rotation limiting structure for limiting the relative rotation between the first bushing 91 and the rotating shaft 4 is arranged between the first bushing 91 and the rotating shaft 4. First rotation limit structure can adopt to set up flat position cooperation or the joint cooperation through key and keyway to the relative rotation of first bush 91 and axis of rotation 4 is restricted when guaranteeing that first bush 91 can follow axis of rotation 4 axial displacement. The resistance to rotation of the one-way bearing 74 in the second rotational direction is further increased by providing the first bush 91 such that the resistance housing 71 can push the one-way bearing 74 to move axially along the rotational shaft 4 and such that the first bush 91 generates a frictional force when moving on the rotational shaft 4.

Embodiment 3, this embodiment is substantially the same as embodiment 1, except that, as shown in fig. 4-7, a second bushing 92 is disposed between the one-way bearing 74 and the resistance seat 71, the one-way bearing 74 rotates with the rotating shaft 4 to drive the second bushing 92 and the resistance seat 71 to rotate, and the resistance seat 71 moves axially along the rotating shaft 4 relative to the second bushing 92. Specifically, a second rotation limiting structure for limiting the relative rotation between the resistance seat 71 and the resistance seat 71 is arranged between the second bushing 92 and the resistance seat 71. The second rotation limiting structure can adopt a flat position matching or a clamping matching of a key and a key groove to ensure that the second bushing 92 can move along the axial direction of the rotating shaft 4 relative to the resistance seat 71 and simultaneously limit the relative rotation of the second bushing 92 and the resistance seat 71. By providing the second bush 92, the one-way bearing rotates to drive the resistance holder to rotate, and the resistance holder 71 can move axially along the rotating shaft 4 relative to the second bush 92.

The above description is provided for one embodiment of the present invention, and the embodiments of the present invention are not limited to these descriptions, and the present invention is not limited to the above nomenclature and the English nomenclature since the trade nomenclature is different. All with the utility model discloses a method, structure etc. are similar, the same, or to the utility model discloses make a plurality of technological deductions or replacement under the design prerequisite, all should regard as the utility model discloses a protection scope.

Claims

1. A bicycle shifter, comprising:

a first body member (1) for mounting on a bicycle frame;

a second body member (2) movably coupled to the first body member (1);

a chain guide (3) rotatably mounted on the second body member (2), the chain guide (3) being rotatable relative to the second body member (2) in a first rotational direction or a second rotational direction, the second rotational direction being opposite to the first rotational direction;

a rotating shaft (4), one end of which is connected with the chain guide (3), and the other end of which is rotatably arranged in the second main body piece (2) in a penetrating way and is used for rotatably installing the chain guide (3) on the second main body piece (2);

a first elastic element (5) provided between the second body piece (2) and the chain guide (3) for maintaining the tendency of the chain guide (3) to rotate in a first rotational direction;

and the resistance generating device (7) is arranged in the second main body part (2) and is used for generating resistance with the second main body part when rotating along the second rotating direction, and the resistance generating device (7) comprises a resistance seat (71) which is axially and movably arranged on the second main body part (2) along the rotating shaft (4), an elastic element prepressing piece (72), a second elastic element (73) and a one-way bearing (74).

2. The bicycle derailleur according to claim 1, characterized in that the one-way bearing (74) is sleeved on the rotation shaft (4) and the free rotation direction is the same as the first rotation direction, the resistance seat (71) can rotate along with the rotation of the one-way bearing (74) along the second rotation direction; the elastic element pre-pressing piece (72) is arranged at one end of the rotating shaft (4) far away from the chain guide (3); the second elastic element (73) is arranged between the resistance seat (71) and the elastic element prepressing piece (72) and is used for pushing the resistance seat (71) to move along the direction far away from the elastic element prepressing piece (72) so as to enable the end face of the resistance seat (71) far away from the elastic element prepressing piece (72) to keep the tendency of abutting contact with the second body piece (2).

3. The bicycle derailleur according to claim 1, wherein the end face of the resistance seat (71) remote from the elastic element pre-pressing member (72) is provided with a first tooth-like structure (101), the second body member (2) is provided with a second tooth-like structure (102) engaged with the first tooth-like structure (101), when the rotating shaft (4) drives the one-way bearing (74) and the resistance seat (71) to rotate along the second rotating direction, the second tooth-like structure (102) is engaged with the first tooth-like structure (101) to push the resistance seat (71) towards the elastic element pre-pressing member (72) until the second tooth-like structure (102) is disengaged from the first tooth-like structure (101), and the resistance seat (71) is pushed by the second elastic element (73) until the first tooth-like structure (101) is re-engaged with the second tooth-like structure (102).

4. The bicycle shifter according to claim 1, wherein a first bushing (91) is disposed between the one-way bearing (74) and the rotating shaft (4), and the resistance seat (71) moves along the rotating shaft (4) in the axial direction to drive the first bushing (91) and the one-way bearing (74) to move along the rotating shaft (4) in the axial direction.

5. The bicycle shifter according to claim 4, wherein a first rotation limiting structure for limiting relative rotation of the first bushing (91) and the rotation shaft (4) is provided between the first bushing (91) and the rotation shaft (4).

6. The bicycle derailleur according to claim 1, wherein a second bushing (92) is provided between the one-way bearing (74) and the resistance seat (71), the one-way bearing (74) rotates along the rotation axis (4) to drive the second bushing (92) and the resistance seat (71) to rotate, and the resistance seat (71) moves axially along the rotation axis (4) relative to the second bushing (92).

7. The bicycle shifter of claim 6, wherein a second rotation limiting structure is provided between the second bushing (92) and the resistance seat (71) for limiting relative rotation of the resistance seat (71) and the resistance seat (71).

8. The bicycle derailleur according to claim 1, wherein the chain guide (3) comprises a first guide plate (31), a second guide plate (32), a guide wheel (33) and a tension wheel (34), the guide wheel (33) and the tension wheel (34) are respectively hinged between the first guide plate (31) and the second guide plate (32), and one end of the first guide plate (31) near the guide wheel (33) is rotatably mounted on the second body member (2) through a rotating shaft (4).

9. The bicycle shifter of claim 8, wherein the second body member (2) is rotatably mounted with an end cap (6), one side of the second body member (2) close to the end cap (6) is provided with an annular mounting groove (211) for the first elastic element (5) to be sleeved, the first elastic element (5) is a torsion spring, one end of the torsion spring extends into the annular mounting groove (211) to be connected with the second body member (2), and the other end of the torsion spring extends out of the annular mounting groove (211) to be connected with the chain guide (3).

10. The bicycle transmission according to claim 9, characterized in that the side of the end cap (6) facing away from the second body part (2) is provided with a positioning slot (61) for positioning the first guide plate (31), the first guide plate (31) being connected to the rotary shaft (4) by means of a first bolt (10).