Bicycle speed regulator

Abstract

The invention discloses a bicycle speed regulator, comprising a speed regulating ratchet, a shift-up push rod, a shift-down push rod and a limiting structure, wherein the limiting structure comprises a limiting member and a limiting spring, wherein the limiting member is provided with a raised limiting pawl; a driving pawl is provided on the rotating driving end of the shift-up push rod, and a release driving end of the shift-down push rod extends to a side of the limiting member away from the original position of the driving pawl; wherein a synchronous driving boss is provided at one end of the limiting member close to the original position of the driving pawl, and the shift-down operation end of the shift-down push rod is toggled to push the limiting member in the direction of the driving pawl, and the synchronous driving boss pushes the driving pawl to move synchronously with the limiting pawl in the direction of release, and respectively away from the outer ratchet groove and the inner ratchet groove. The bicycle speed regulator can not only solve the problem of the driving pawl limiting the speed regulating ratchet, but also eliminate the virtual stroke, so that the gear adjustment operation can be completed accurately and conveniently, and the user experience is improved.

Description

Technical Field

[0001] The invention relates to a bicycle speed regulating device, in particular to a bicycle speed regulator. Background Art

[0002] In a bicycle equipped with a speed regulating device, the chain can be switched to cooperate with gear plates of different sizes by turning the speed regulator on the handlebar; when adjusting the speed, the push rod of the speed regulator is turned to pull the chain puller through the guide rope to shift the chain from the current flywheel to the next flywheel, completing the gear switching, thereby adjusting the transmission ratio of the front and rear gears and the driving pedaling force to meet different usage requirements.

[0003] In the existing speed regulator, for example, the invention patent with the authorization announcement number CN 105438397 B discloses a bicycle speed change device, which is provided with an upshift push rod and a downshift push rod, wherein the upshift push rod is used to push the speed regulating ratchet to rotate, and at the same time, the speed regulating ratchet drives the guide rope to pull the derailleur, and after the upshift push rod is released, the speed regulating ratchet is limited by the limit pawl to prevent the speed regulating ratchet from rotating due to the force of the torsion spring, thereby ensuring that the speed regulating ratchet can stay in the position after the gear shift; the downshift push rod is used to release the limit pawl to keep it away from the current ratchet groove of the speed regulating ratchet, and due to the lack of limit, the speed regulating ratchet can rotate under the force of the torsion spring to perform downshift.

[0004] Furthermore, when the upshift push rod is released after the upshift is completed, its reset spring will drive the upshift push rod to rotate and reset, so that the driving pawl on the upshift push rod moves to the original position; wherein, in order to prevent the driving pawl from limiting the speed regulating ratchet during the downshift process, the existing speed regulator will set a lifting boss at the original position where the driving pawl is reset, so as to lift the driving pawl that has been reset to the original position and suspend it outside the next outer ratchet groove, so as to avoid the driving pawl limiting the speed regulating ratchet. After the limiting pawl is released, the speed regulating ratchet can be released to complete the downshift operation. Although the above structure can solve the problem of the driving pawl limiting the speed regulating ratchet, it also has the following problems:

[0005] In the next shifting, the rider pushes the shifting push rod, which needs to complete two necessary strokes: the first stroke is to drive the driving pawl from the lifted boss to the current outer ratchet groove, and the second stroke is to make the driving pawl drive the speed regulating ratchet to rotate forward; so in actual use, it will first go through a virtual stroke, and then enter the shifting stroke, which may give the rider the illusion of shifting, and it is difficult to clearly and accurately control the shifting operation, and the total stroke is relatively long, requiring a larger driving amplitude, the convenience is poor, and the experience effect needs to be improved. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned problems and provide a bicycle speed regulator, which can not only solve the problem of the driving pawl limiting the speed regulating ratchet, but also eliminate the virtual stroke, so that the gear shifting operation can be completed accurately and conveniently, thereby improving the user experience.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A bicycle speed regulator comprises a speed regulating ratchet for pulling a guide rope, a shift-up push rod for driving the speed regulating ratchet to rotate, a shift-down push rod for releasing the speed regulating ratchet, and a limiting structure for limiting the speed regulating ratchet, wherein the limiting structure comprises a limiting member and a limiting spring, wherein a raised limiting pawl is provided on the limiting member, and the limiting spring forces the limiting pawl to extend into an inner ratchet groove of the speed regulating ratchet; a driving pawl for driving the speed regulating ratchet to rotate in a direction opposite to that of an outer ratchet is provided on a rotating driving end of the shift-up push rod, and a releasing driving end of the shift-down push rod extends to a side of the limiting member away from an original position of the driving pawl;

[0009] Among them, a synchronous driving boss is provided at one end of the limit member close to the original position of the driving pawl. When the downshift operating end of the downshift push rod is moved, its released driving end pushes the limit member in the direction of the driving pawl around the hinge shaft. The synchronous driving boss drives the driving pawl as the limit member moves linearly, so that the driving pawl and the limit pawl move synchronously in the release direction, away from the outer ratchet groove and the inner ratchet groove of the speed regulating ratchet respectively.

[0010] The working principle of the above bicycle speed regulator is:

[0011] During the process of shifting up, after the shifting push rod is released, the shifting push rod makes a reset rotation, thereby driving the driving pawl to move to the original position, and the driving pawl bypasses the rear outer ratchet and enters the next outer ratchet groove.

[0012] During the downshifting process, when the rider pushes the downshift push rod, the release drive end of the downshift push rod pushes the limit piece around the hinge shaft in the direction of the driving pawl, and the limit piece compresses the limit spring to move; since the limit piece is provided with a synchronous drive boss at one end close to the original position of the driving pawl (the original position refers to the position of the driving pawl before the upshift push rod and the downshift push rod are rotated), during the forward movement of the limit piece, the synchronous drive boss directly acts on the driving pawl and moves synchronously with the limit pawl in the release direction together with the limit piece (the release direction refers to the direction in which the downshift push rod pushes the limit pawl to leave the inner ratchet groove and contact the limit), that is, the limit pawl and the driving pawl are simultaneously away from the outer ratchet groove and the inner ratchet groove; when the limit pawl and the driving pawl are all moved outside the corresponding ratchet groove, due to the lack of limit, the speed regulating ratchet rotates under the action of the speed regulating torsion spring to downshift.

[0013] In a preferred embodiment of the present invention, the synchronous drive boss is integrally formed on the limiting member.

[0014] A preferred solution of the present invention further includes a bracket on the housing of the speed regulator and a rotating shaft arranged on the bracket, one end of the rotating shaft is fixed to the bracket, and the other end passes through the rotation center of the speed regulating ratchet and the rotating drive end respectively.

[0015] A preferred embodiment of the present invention is that one end of the upshift push rod is an upshift operating end for a toggle operation, and the other end is the rotation drive end; one end of the downshift push rod is a downshift operating end for a toggle operation, and the other end is the release drive end.

[0016] Preferably, a rotation reset coil spring is provided on one side of the rotation driving end, one end of the rotation reset coil spring is fixed on the rotation driving end, and the other end of the rotation reset coil spring is fixed on the bracket;

[0017] A release reset torsion spring is provided on one side of the release drive end, one end of which is fixed on the release drive end and the other end is fixed on the bracket. By providing the reset coil spring and the reset torsion spring, the upshift push rod and the downshift push rod can be automatically driven to reset after the gear shifting is completed, which greatly facilitates the gear shifting operation.

[0018] A preferred embodiment of the present invention is that a driving torsion spring is provided between the driving pawl and the rotating driving end to force the driving pawl to abut against the outer ratchet groove of the speed regulating ratchet. Under the action of the driving torsion spring, the driving pawl can be forced to abut against the outer ratchet groove to ensure that each gear-up operation can drive the speed regulating ratchet to rotate and smoothly complete the gear-up. At the same time, the outer ratchet structure can be avoided when the gear-up push rod is reset, and the next ratchet groove can be entered again after passing the current outer ratchet to prepare for the next gear-up adjustment.

[0019] A preferred embodiment of the present invention is that the speed regulating ratchet is fixedly connected to the guide rope through a guide rope fixing piece, one end of the speed regulating ratchet is set as an external ratchet structure, and the other end is set as an internal ratchet structure; in the circumferential direction, the external ratchet structure is provided with a plurality of external ratchets, and the internal ratchet structure is provided with a plurality of internal ratchets; the external ratchets and the internal ratchets have the same orientation.

[0020] Preferably, a speed regulating torsion spring is provided between the speed regulating ratchet and the guide rope fixing piece, one end of the speed regulating torsion spring is fixed to the speed regulating ratchet, and the other end is fixed to the guide rope fixing piece.

[0021] In a preferred embodiment of the present invention, the bracket is provided with an avoidance hole for allowing the limit pawl to move laterally.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the bicycle speed regulator of the present invention, a synchronous driving boss is fixedly arranged on the limiting member. When the limiting member moves in the releasing direction, the limiting pawl and the driving pawl are driven away from the outer ratchet groove and the inner ratchet groove at the same time. This can solve the problem of the driving pawl limiting the speed regulating ratchet wheel and eliminate the virtual stroke, thereby eliminating the virtual stroke existing in the prior art, and the operation of the speed regulator can be accurately and conveniently mastered, thereby improving the user experience.

[0024] 2. Since two sets of independent limit release actions are completed simultaneously in the same shifting stroke, the shifting stroke of the entire shifting operation can be effectively shortened, making the speed regulation operation of the speed regulator more delicate and tight. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a three-dimensional exploded schematic diagram of the bicycle speed regulator of the present invention.

[0026] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the downshift push rod, the limit member and the driving pawl.

[0027] Figure 3-8 Schematic diagram of the upshift adjustment of the bicycle speed regulator in the present invention, wherein: Figure 3 This is a schematic diagram before shifting. Figure 4 This is a schematic diagram of the initial push of the upshift lever. Figure 5 This is a schematic diagram of the limit pawl avoiding the inner ratchet. Figure 6 This is a schematic diagram of the limit pawl just crossing the inner ratchet tooth. Figure 7 This is a schematic diagram of the limiting pawl entering the next inner ratchet groove. Figure 8 Schematic diagram of the automatic resetting of the shift lever.

[0028] Figure 9-12 Schematic diagram of the downshift adjustment of the bicycle speed regulator in the present invention, wherein: Fig. 9 This is a schematic diagram of the downshift push rod being pushed at the beginning. Fig.10 Schematic diagram of the driving pawl and the limit pawl leaving the ratchet groove. Fig.11 This is a schematic diagram of the speed regulating ratchet wheel rotating. Fig.12 It is a schematic diagram of the limiting pawl entering the next inner ratchet groove. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0030] See also Figure 1-2The bicycle speed regulator in this embodiment includes a bracket 1 on the outer shell of the speed regulator, a rotating shaft 2 arranged on the bracket 1, a speed regulating ratchet 3 for pulling the guide rope, an upshift push rod 4 for driving the speed regulating ratchet 3 to rotate, a downshift push rod 5 for releasing the speed regulating ratchet 3, and a limiting structure for limiting the speed regulating ratchet 3, wherein the limiting structure includes a limiting member 6 and a limiting spring 7, wherein the limiting member 6 is provided with a raised limiting pawl 6-1, and the limiting spring 7 prompts the limiting pawl 6-1 to extend into the inner ratchet groove of the speed regulating ratchet 3.

[0031] See also Figure 1-2 One end of the upshift push rod 4 is the upshift operation end for toggling operation, and the other end is the rotation drive end, on which a driving pawl 8 is provided for driving the speed regulating ratchet 3 to rotate in the opposite direction of the outer ratchet teeth; one end of the downshift push rod 5 is the downshift operation end for toggling operation, and the other end is the release drive end; the release drive end extends to the side of the limiter 6 away from the original position of the driving pawl 8. One end of the rotating shaft 2 is fixed on the bracket 1, and the other end passes through the rotation center of the speed regulating ratchet 3 and the rotation drive end respectively.

[0032] Among them, a synchronous driving boss 6-2 is provided at one end of the limit member 6 close to the original position of the driving pawl 8. When the downshift operating end of the downshift push rod 5 is moved, its released driving end pushes the limit member 6 in the direction of the driving pawl 8 around the hinge axis, and the synchronous driving boss 6-2 pushes the driving pawl 8 and the limit pawl 6-1 to move synchronously in the release direction, away from the outer ratchet groove and the inner ratchet groove of the speed regulating ratchet 3 respectively.

[0033] See also Figure 1-2 , the synchronous drive boss 6-2 is integrally formed on the position limiting member 6. Of course, other fixed connection technologies can also be used to fix the synchronous drive boss 6-2 on the position limiting member 6.

[0034] See also Figure 1-2 A rotation reset coil spring 9 is provided on one side of the rotation driving end, one end of which is fixed on the rotation driving end, and the other end is fixed on the bracket 1; a release reset torsion spring 10 is provided on one side of the release driving end, one end of which is fixed on the release driving end, and the other end is fixed on the bracket 1. By providing the reset coil spring and the reset torsion spring, the upshift push rod 4 and the downshift push rod 5 can be automatically driven to reset after the gear shifting is completed, which greatly facilitates the gear shifting operation.

[0035] See also Figure 1-2A driving torsion spring 11 is provided between the driving pawl 8 and the rotating driving end to force the driving pawl 8 to abut against the outer ratchet groove of the speed regulating ratchet 3. Under the action of the driving torsion spring 11, the driving pawl 8 can be forced to abut against the outer ratchet groove to ensure that each gear-up operation can drive the speed regulating ratchet 3 to rotate and smoothly complete the gear-up. At the same time, it can also avoid the outer ratchet structure when the gear-up push rod 4 is reset, and enter the next ratchet groove again after passing the current outer ratchet to prepare for the next gear-up adjustment.

[0036] See also Figure 1-2 The speed regulating ratchet 3 is fixedly connected to the guide rope through a guide rope fixing member 12. One end of the speed regulating ratchet 3 is set as an external ratchet structure, and the other end is set as an internal ratchet structure. In the circumferential direction, the external ratchet structure is provided with a plurality of external ratchets, and the internal ratchet structure is provided with a plurality of internal ratchets. The external ratchets and the internal ratchets have the same orientation.

[0037] Furthermore, a speed regulating torsion spring 13 is provided between the speed regulating ratchet 3 and the guide rope fixing piece 12 , and one end of the speed regulating torsion spring 13 is fixed to the speed regulating ratchet 3 , and the other end is fixed to the guide rope fixing piece 12 .

[0038] See also Figure 1 The bracket 1 is provided with an avoidance hole for avoiding the lateral movement of the limit pawl 6 - 1 .

[0039] See also Figure 1-12 , the working principle of the above bicycle speed regulator is:

[0040] During the shifting process, after the shifting push rod 4 is released, the shifting push rod 4 is reset and rotated, thereby driving the driving pawl 8 to move to the original position, and the driving pawl 8 bypasses the rear outer ratchet and enters the next outer ratchet groove. The specific operation of shifting is as follows: Figure 3-8 .

[0041] During the downshifting process, when the rider pushes the downshift push rod 5, the release driving end of the downshift push rod 5 pushes the limit member 6 in the direction of the driving pawl 8 around the hinge shaft, and the limit member 6 compresses the limit spring 7 to move; since the end of the limit member 6 close to the original position of the driving pawl 8 is provided with a synchronous driving boss 6-2, during the forward movement of the limit member 6, the synchronous driving boss 6-2 directly acts on the driving pawl 8, and moves synchronously with the limit member 6 and the limit pawl 6-1 in the release direction (the release direction refers to the direction in which the downshift push rod 5 pushes the limit pawl 6-1 to leave the inner ratchet groove to contact the limit), that is, the limit pawl 6-1 and the driving pawl 8 are simultaneously away from the outer ratchet groove and the inner ratchet groove, such as Figure 9-12When the limit pawl 6-1 and the driving pawl 8 are all moved outside the corresponding ratchet grooves, the driving pawl 8 moves out of the outer ratchet groove first, and the limit pawl 6-1 moves out of the inner ratchet groove later. Due to the lack of limit, the speed regulating ratchet 3 rotates under the action of the speed regulating torsion spring 13 to downshift.

[0042] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A bicycle speed regulator, characterized in that: It comprises a speed regulating ratchet for pulling a guide rope, an upshift push rod for driving the speed regulating ratchet to rotate, a downshift push rod for releasing the speed regulating ratchet, and a limiting structure for limiting the speed regulating ratchet, wherein the limiting structure comprises a limiting member and a limiting spring, wherein a raised limiting pawl is provided on the limiting member, and the limiting spring causes the limiting pawl to extend into the inner ratchet groove of the speed regulating ratchet; a driving pawl for driving the speed regulating ratchet to rotate in the opposite direction along the outer ratchet is provided on the rotating driving end of the upshift push rod, and the releasing driving end of the downshift push rod extends to a side of the limiting member away from the original position of the driving pawl; Among them, a synchronous driving boss is provided at one end of the limit member close to the original position of the driving pawl. When the downshift operating end of the downshift push rod is moved, its released driving end pushes the limit member in the direction of the driving pawl around the hinge shaft. The synchronous driving boss drives the driving pawl as the limit member moves linearly, so that the driving pawl and the limit pawl move synchronously in the release direction, away from the outer ratchet groove and the inner ratchet groove of the speed regulating ratchet respectively.

2. The bicycle speed regulator according to claim 1, characterized in that: The synchronous driving boss is integrally formed on the limiting member.

3. The bicycle speed regulator according to claim 1, characterized in that: It also includes a bracket on the housing of the speed regulator and a rotating shaft arranged on the bracket, one end of the rotating shaft is fixed on the bracket, and the other end passes through the rotating center of the speed regulating ratchet and the rotating driving end respectively.

4. The bicycle speed regulator according to any one of claims 1 to 3, characterized in that: One end of the upshift push rod is the upshift operating end for the toggle operation, and the other end is the rotation driving end; one end of the downshift push rod is the downshift operating end for the toggle operation, and the other end is the release driving end.

5. The bicycle speed regulator according to claim 4, characterized in that: A rotation reset coil spring is provided on one side of the rotation driving end, one end of the rotation reset coil spring is fixed on the rotation driving end, and the other end is fixed on the bracket; A release reset torsion spring is arranged on one side of the release driving end, one end of the release reset torsion spring is fixed on the release driving end, and the other end of the release reset torsion spring is fixed on the bracket.

6. The bicycle speed regulator according to claim 4, characterized in that: A driving torsion spring is provided between the driving pawl and the rotating driving end for forcing the driving pawl to abut against the outer ratchet groove of the speed regulating ratchet wheel.

7. The bicycle speed regulator according to claim 1, characterized in that: The speed regulating ratchet is fixedly connected to the guide rope through a guide rope fixing piece. One end of the speed regulating ratchet is set as an external ratchet structure, and the other end is set as an internal ratchet structure. In the circumferential direction, the external ratchet structure is provided with a plurality of external ratchets, and the internal ratchet structure is provided with a plurality of internal ratchets. The external ratchets and the internal ratchets have the same orientation.

8. The bicycle speed regulator according to claim 7, characterized in that: A speed regulating torsion spring is arranged between the speed regulating ratchet and the guide rope fixing piece, one end of the speed regulating torsion spring is fixed on the speed regulating ratchet, and the other end is fixed on the guide rope fixing piece.

9. The bicycle speed regulator according to claim 3, characterized in that: The bracket is provided with an avoidance hole for avoiding the lateral movement of the limit pawl.

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