Labor-saving ratchet wheel type multi-stage parking structure

Abstract

The invention discloses a labor-saving ratchet wheel type multi-stage parking structure which comprises a brake handle seat installed on a bicycle grip and a brake handle hinged to the brake handle seat. The brake handle is connected with a brake steel wire, a ratchet wheel block is fixed to the brake handle, a pawl and a shifting handle are hinged to the brake handle seat, and the pawl and the ratchet wheel block are used in cooperation. And a spring combination is arranged between the shifting handle and the pawl. When parking is needed, the shifting handle is rotated clockwise, the elastic potential energy of the spring combination is partially released, the spring combination acts on the pawl, the pawl is made to be close to the ratchet wheel block, the ratchets are meshed with the pawl, the braking state of the braking handle is kept, and parking is achieved. When parking is released, the shifting handle is rotated anticlockwise, the pawl is far away from the ratchet wheel block under the elastic force of the spring combination, and parking is released. According to the design, parking and releasing can be achieved only by overcoming spring force, automatic parking releasing can be achieved through the self-reset function of the spring combination, and operation is convenient. According to the design, a ratchet wheel structure is adopted, and multi-gear parking can be achieved.

Description

Technical Field

[0001] The invention relates to the field of non-motor vehicles, and in particular to a parking mechanism for a bicycle. Background Art

[0002] In recent years, an electric-assisted cargo bicycle has emerged in the European and American markets. The brakes of this type of vehicle need to be equipped with a parking function. Currently, most of the hydraulic disc brake parking structures on the market cannot reset automatically, and require a lot of force to press or rotate to park and release the vehicle, which is not convenient and fast enough. In addition, there is only one level of parking. When the brake is out of oil, the parking structure will often lose its function. Summary of the invention

[0003] The technical problem solved by the present invention is that the hydraulic disc brake parking structure of the electric assisted cargo bicycle cannot be automatically reset and requires a large force to achieve parking and release parking, which is not convenient and quick enough.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: a labor-saving ratchet multi-stage parking structure, comprising a brake handle seat installed on a bicycle handle, a brake handle hinged on the brake handle seat, the brake handle is connected to a brake steel wire, a ratchet block is fixed on the brake handle, a pawl and a lever are hinged on the brake handle seat, the pawl and the ratchet block are used in conjunction, a spring combination is provided between the lever and the pawl, when the lever rotates clockwise, the elastic potential energy of the spring combination is partially released, and the pawl can be driven to move closer to the ratchet block; when the lever rotates counterclockwise, the spring combination drives the pawl away from the ratchet block.

[0005] According to the above technical solution, when parking is not required, the pawl is away from the ratchet block, and the two are not in contact. The operator activates the brake handle, which is no different from the brake handle commonly used in bicycles in the prior art. When parking is required, the operator rotates the dial clockwise, and the elastic potential energy of the spring combination is partially released. The spring combination acts on the pawl, causing the pawl to move closer to the ratchet block. At this time, the operator activates the brake handle, and the ratchet on the ratchet block engages with the pawl. The brake handle cannot be automatically reset, and the braking state of the brake handle is maintained, that is, parking is achieved. When releasing parking, the operator rotates the dial counterclockwise, and the dial is in a release state with respect to the pawl. At this time, under the elastic force of the spring combination, the pawl is away from the ratchet block, and the brake handle is reset under the action of its own spring, and parking is released.

[0006] The pawl is hinged on the brake handle seat through a pawl hinge shaft, and the pawl is provided with a limit chamber. The spring combination includes a torsion spring fitted on the pawl hinge shaft, and a telescopic spring arranged in the limit chamber. A lever is provided at the end of the lever, and the lever deviates from the rotation center axis of the lever. One end of the torsion spring is fixedly connected to the brake handle seat, and the other end of the torsion spring is against the lever. One end of the torsion spring against the lever is bent and extends into the limit chamber to against one end of the telescopic spring.

[0007] According to the design of the spring combination, when parking, the operator rotates the dial clockwise, and the elastic potential energy of one end of the torsion spring that abuts against the dial rod is partially released, and the downwardly bent part of the end of the torsion spring acts on the side wall of the limit chamber, so that the pawl approaches the ratchet block. At this time, the operator activates the brake handle, and the ratchet on the ratchet block engages with the pawl, and the brake handle cannot be automatically reset, and the braking state of the brake handle is maintained, that is, parking is achieved. When releasing the parking, the operator rotates the dial counterclockwise, and the dial rod moves away from the ratchet block. The dial rod acts on one end of the torsion spring, so that it accumulates elastic potential energy, and the telescopic spring that abuts against one end of the torsion spring acts on the other side wall of the limit chamber (the side wall is opposite to the side wall against which one end of the torsion spring abuts), so that the pawl moves away from the ratchet block along with the dial rod of the dial, and the brake handle is reset under the action of its own spring, and the parking is released.

[0008] The limiting chamber is formed by the intersection of a vertical limiting hole and a horizontal spring hole. The telescopic spring is matched in the spring hole, and the bent part of one end of the torsion spring extends downward into the limiting hole.

[0009] The ratchet block is provided with a plurality of tooth grooves, and the ratchet pawl can cooperate with any tooth groove.

[0010] A fan-shaped groove is arranged on the side wall of the dial handle, and a horizontal limit screw is installed on the brake handle seat, and one end of the limit screw is matched in the fan-shaped groove. The fan-shaped groove and the limit screw are used in combination to limit the rotation range of the dial handle.

[0011] The present invention controls the rotation and compression of a torsion spring and a telescopic spring by a lever, and drives the pawl to move without directly acting on the pawl, thereby realizing parking and releasing the parking. When parking and releasing the parking, it can be realized by overcoming the spring force, and the self-reset function of the spring combination can be used to realize automatic release of parking, which is easy to operate.

[0012] The present invention adopts a ratchet structure, which can realize parking in multiple gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of a labor-saving ratchet-type multi-stage parking structure;

[0015] Figure 2 for Figure 1 A diagram of a bicycle with its handlebars hidden;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 for Figure 2 Schematic diagram of the middle B direction;

[0018] Figure 5 for Figure 2 A cross-sectional view of

[0019] Figure 6 for Figure 4 Enlarged view of point C in the middle;

[0020] Figure 7 for Figure 5 Enlarged view of point D in the middle;

[0021] Figure 8 It is a schematic diagram of the partial structure of the labor-saving ratchet-type multi-stage parking structure after it is hidden;

[0022] Fig. 9 for Figure 8 Enlarged view of point E in the middle;

[0023] Fig.10 is a schematic diagram of the pawl 50;

[0024] Fig.11 is a schematic diagram of the pawl 50 from another perspective;

[0025] Fig.12 Schematic diagram of the dial handle 60.

[0026] Explanation of symbols in the figure:

[0027] 10. Bicycle handlebars;

[0028] 20. Brake handle seat;

[0029] 30. Brake handle;

[0030] 40. Ratchet block;

[0031] 50, ratchet; 51, ratchet hinge shaft; 52, limit hole; 53, spring hole; 54, hinge shaft hole; 55, claw;

[0032] 60. Handle; 61. Lever; 62. Fan-shaped groove; 63. Limit screw;

[0033] 71. Torsion spring; 711. The bent portion at one end of a torsion spring; 72. Telescopic spring. DETAILED DESCRIPTION

[0034] Combination Figures 1 to 3 , Figure 6 to Figure 7A labor-saving ratchet multi-stage parking structure comprises a brake handle seat 20 mounted on a bicycle handle 10, a brake handle 30 hinged on the brake handle seat, the brake handle is connected to a brake steel wire, a ratchet block 40 is fixed on the brake handle, a pawl 50 and a lever 60 are hinged on the brake handle seat, the pawl and the ratchet block are used in conjunction with each other, a spring combination is arranged between the lever and the pawl, when the lever rotates clockwise, the elastic potential energy of the spring combination is partially released, and the pawl can be driven to approach the ratchet block; when the lever rotates counterclockwise, the spring combination drives the pawl away from the ratchet block.

[0035] The pawl 50 is hinged on the brake handle seat 20 through the pawl hinge shaft 51. The pawl is provided with a limit chamber. The spring combination includes a torsion spring 71 fitted on the pawl hinge shaft, and a telescopic spring 72 arranged in the limit chamber. A lever 61 is provided at the end of the dial hand 60. The lever deviates from the rotation center axis of the dial hand. One end of the torsion spring is fixedly connected to the brake handle seat, and the other end of the torsion spring is against the lever. One end of the torsion spring against the lever is bent and extends into the limit chamber to against one end of the telescopic spring.

[0036] The limiting chamber is formed by the intersection of a vertical limiting hole 52 and a horizontal spring hole 53. The telescopic spring 72 is fitted in the spring hole, and the bent portion 711 at one end of the torsion spring 71 extends downward into the limiting hole.

[0037] like Figure 3 , Figure 7 The ratchet block 40 is provided with five tooth grooves, and the pawl 50 can cooperate with any tooth groove.

[0038] Combination Figure 3 , Fig.12 A fan-shaped groove 62 is provided on the side wall of the dial handle 60, and a horizontal limit screw 63 is installed on the brake handle seat 20, and one end of the limit screw is matched in the fan-shaped groove.

[0039] When parking, the operator rotates the dial handle 60 clockwise, and the elastic potential energy of one end of the torsion spring 71 that abuts against the dial rod is partially released. The downwardly bent portion 711 of the torsion spring acts on the side wall of the limiting chamber, so that the pawl 50 approaches the ratchet block 40. At this time, the operator activates the brake handle 30, and the ratchet on the ratchet block 40 engages with the pawl 50. The brake handle 30 cannot be automatically reset, and the braking state of the brake handle is maintained, that is, parking is achieved. When releasing parking, the operator rotates the dial handle 60 counterclockwise, and the dial rod moves away from the ratchet block 40. The dial rod acts on one end of the torsion spring 71, so that it accumulates elastic potential energy. The telescopic spring 72 that abuts against one end of the torsion spring acts on the other side wall of the limiting chamber, which is opposite to the side wall against which one end of the torsion spring abuts. In this way, the pawl 50 moves away from the ratchet block 40 along with the dial handle's dial rod 61, and the brake handle is reset under the action of its own spring, and parking is released.

[0040] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A labor-saving ratchet type multi-stage parking structure, comprising a brake handle seat (20) mounted on a bicycle handle (10), a brake handle (30) hinged on the brake handle seat, the brake handle being connected to a brake steel wire, characterized in that: A ratchet block (40) is fixed on the brake handle, a ratchet pawl (50) and a lever (60) are hinged on the brake handle seat, the pawl and the ratchet block are used in conjunction with each other, a spring combination is arranged between the lever and the pawl, when the lever rotates clockwise, the elastic potential energy of the spring combination is partially released, and the pawl can be driven to approach the ratchet block; when the lever rotates counterclockwise, the spring combination drives the pawl away from the ratchet block.

2. The labor-saving ratchet multi-stage parking structure according to claim 1, characterized in that: The ratchet (50) is hinged on the brake handle seat (20) through a ratchet hinge shaft (51), and the ratchet is provided with a limit chamber. The spring combination includes a torsion spring (71) matched on the ratchet hinge shaft, and a telescopic spring (72) arranged in the limit chamber. The end of the dial handle (60) is provided with a lever (61), and the lever deviates from the rotation center axis of the dial handle. One end of the torsion spring is fixedly connected to the brake handle seat, and the other end of the torsion spring is against the lever. One end of the torsion spring against the lever is bent and extends into the limit chamber to against one end of the telescopic spring.

3. The labor-saving ratchet multi-stage parking structure according to claim 2, characterized in that: The limiting chamber is formed by the intersection of a vertical limiting hole (52) and a horizontal spring hole (53), the telescopic spring (72) is fitted in the spring hole, and the bent portion (711) at one end of the torsion spring (71) extends downward into the limiting hole.

4. The labor-saving ratchet multi-stage parking structure according to claim 1, characterized in that: The ratchet block (40) is provided with a plurality of tooth grooves, and the ratchet pawl (50) can be matched with any tooth groove.

5. The labor-saving ratchet multi-stage parking structure according to claim 1, characterized in that: A fan-shaped groove (62) is arranged on the side wall of the dial handle (60), and a horizontal limiting screw (63) is installed on the brake handle seat (20), and one end of the limiting screw is matched in the fan-shaped groove.

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