Labor-saving ratchet wheel type multi-stage parking structure

Abstract

The utility model 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 is used in cooperation with the ratchet wheel block. 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 utility model relates to non-motor vehicle field, concretely relates to the parking mechanism of bicycle. BACKGROUND

[0002] In recent years, a kind of electric power-assisted cargo bicycle is rising in the market of Europe and America, and the brake of this type of vehicle needs to be equipped with parking function, and the parking structure of oil pressure disc brake in the market cannot be automatically reset currently, and needs to be pressed or rotated with great force to realize parking and release parking, which is not convenient and fast enough.In addition, the parking is only one level, and when the brake is out of oil, the parking structure will lose function. CONTENT OF UTILITY MODEL

[0003] The utility model solves the technical problem that the oil pressure disc brake parking structure of electric power-assisted cargo bicycle cannot be automatically reset, and needs to be realized parking and release parking with greater force, which is not convenient and fast enough.

[0004] To solve the above technical problem, the utility model provides the following technical scheme: a labor-saving ratchet wheel type multi-level parking structure, including brake handle seat installed on bicycle handlebar, brake handle hinged on brake handle seat, brake handle is connected with brake steel wire, brake handle is fixed with ratchet wheel block, brake handle seat is hinged with pawl and handle lever, pawl is used in cooperation with ratchet wheel block, spring combination is arranged between handle lever and pawl, handle lever rotates clockwise, and the elastic potential energy of spring combination is partially released, so as to drive pawl to close ratchet wheel block;Handle lever rotates counterclockwise, and spring combination drives pawl to move away from ratchet wheel block.

[0005] According to the above technical scheme, when parking is not needed, pawl moves away from ratchet wheel block, and the two are not in contact, and the operator acts brake handle, which is the same as the brake handle commonly used in the prior art bicycle.When parking is needed, the operator rotates handle lever clockwise, the elastic potential energy of spring combination is partially released, spring combination acts on pawl, so that pawl closes ratchet wheel block, at this time, the operator acts brake handle, the ratchet teeth on ratchet wheel block are engaged with pawl, brake handle cannot be automatically reset, and the braking state of brake handle is maintained, that is, parking is realized.When releasing parking, the operator rotates handle lever counterclockwise, and handle lever is in the released state to pawl, at this time, pawl moves away from ratchet wheel block under the elastic force of spring combination, and brake handle is reset under the spring action of itself, and parking is released.

[0006] Pawl is hinged on brake handle seat through pawl hinge shaft, pawl is provided with limiting chamber, spring combination includes torsional spring matched on pawl hinge shaft, and telescopic spring arranged in limiting chamber, the end of handle lever is provided with lever, lever deviates from the rotation center axis of handle lever, one end of torsional spring is fixedly connected with brake handle seat, the other end of torsional spring is abutted with lever, the one end of torsional spring abutted with lever is bent and extends into limiting chamber and is abutted with one end of telescopic spring.

[0007] According to the design of the spring combination, when parking, the operator rotates the knob clockwise, the elastic potential energy of one end of the torsion spring abutting against the push rod is partially released, the downward bent part of the one end of the torsion spring acts on the side wall of the limiting chamber, the pawl is close to the ratchet block, at this time, the operator operates the brake handle, the ratchet teeth on the ratchet block are engaged with the pawl, the brake handle cannot be automatically reset, the brake state of the brake handle is maintained, that is, parking is realized. When the parking is released, the operator rotates the knob counterclockwise, the push rod is away from the ratchet block, the push rod acts on one end of the torsion spring to accumulate elastic potential energy, the extension spring abutting against the one end of the torsion spring acts on the other side wall of the limiting chamber (the side wall is opposite to the side wall abutting against the one end of the torsion spring), in this way, the pawl is away from the ratchet block with the push rod of the knob, the brake handle is reset under the action of the spring of the brake handle, and the parking is released.

[0008] The limiting chamber is formed by the intersection of the vertical limiting hole and the horizontal spring hole, the extension spring is matched in the spring hole, and the bent part of the 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 pawl can be matched with any tooth groove.

[0010] The side wall of the knob is provided with a fan-shaped groove, the brake handle seat is provided with a horizontal limiting screw, and one end of the limiting screw is matched in the fan-shaped groove. The cooperation of the fan-shaped groove and the limiting screw limits the rotation amplitude of the knob.

[0011] The utility model discloses a knob is used to control the rotation and compression of a torsion spring and an extension spring, drives the pawl to act without directly acting on the pawl, realizes parking and the release of parking. When parking and releasing parking, only the spring force can be overcome to realize, and the automatic release of parking can be realized by using the self-resetting function of the spring combination, and the operation is convenient.

[0012] The utility model discloses a ratchet structure, which can realize multiple gear parking. ACCREDITED DRAWINGS

[0013] The utility model will be further described in connection with the drawings:

[0014] Figure 1 It is the schematic diagram of power-saving ratchet type multistage parking structure;

[0015] Figure 2 It is Figure 1 It is the schematic diagram of the handle of the bicycle in the middle;

[0016] Figure 3 It is Figure 2 It is the enlarged view of A in the middle;

[0017] Figure 4 It isFigure 2 schematic view of the middle B;

[0018] Figure 5 is Figure 2 a sectional view;

[0019] Figure 6 is Figure 4 a magnified view of the middle C;

[0020] Figure 7 is Figure 5 a magnified view of the middle D;

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

[0022] Figure 9 is Figure 8 a magnified view of the middle E;

[0023] Figure 10 is a schematic view of the pawl 50;

[0024] Figure 11 is a schematic view of the pawl 50 from another perspective;

[0025] Figure 12 is a schematic view of the knob 60.

[0026] Explanation of symbols in the drawings:

[0027] 10, bicycle handle;

[0028] 20, brake handle seat;

[0029] 30, brake handle;

[0030] 40, ratchet block;

[0031] 50, pawl; 51, pawl hinge shaft; 52, limiting hole; 53, spring hole; 54, hinge shaft hole; 55, claw part;

[0032] 60, knob; 61, knob rod; 62, fan-shaped groove; 63, limiting screw;

[0033] 71, torsional spring; 711, bent part of one end of the torsional spring; 72, extension spring. DETAILED DESCRIPTION

[0034] In combination Figures 1 to 3 , Figures 6 to 7A labor-saving ratchet multi-stage parking structure includes a brake handle base 20 mounted on a bicycle handle 10, a brake handle 30 hinged on the brake handle base, 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 shifting hand 60 are hinged on the brake handle base, the pawl and the ratchet block are used in conjunction with a spring combination provided between the shifting hand and the pawl, when the shifting hand rotates clockwise, the elastic potential energy of the spring combination is partially released, which can drive the pawl closer to the ratchet block; when the shifting hand rotates counterclockwise, the spring combination drives the pawl away from the ratchet block.

[0035] The pawl 50 is hinged to 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. The end of the dial hand 60 is provided with a dial rod 61, which 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 dial rod. One end of the torsion spring that is against the dial rod is bent and extends into the limit chamber, 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] Combine Figure 3 、 Figure 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, one end of the limit screw fits in the fan-shaped groove.

[0039] To park the vehicle, the operator rotates the dial handle 60 clockwise, partially releasing the elastic potential energy of one end of the torsion spring 71 abutting the dial lever. The downwardly bent portion 711 of the torsion spring acts on the sidewall of the limiting chamber, forcing the pawl 50 toward the ratchet block 40. At this point, the operator activates the brake handle 30, causing the ratchet teeth on the ratchet block 40 to engage with the pawl 50. The brake handle 30 cannot automatically return to its original position, maintaining its braking state. To release the vehicle from parking, the operator rotates the dial handle 60 counterclockwise, moving the dial lever away from the ratchet block 40. The dial lever acts on one end of the torsion spring 71, causing it to accumulate elastic potential energy. The expansion spring 72 abutting one end of the torsion spring acts on the other sidewall of the limiting chamber, which is opposite to the sidewall abutted by the torsion spring. This causes the pawl 50 to move away from the ratchet block 40 along with the dial handle's dial lever 61. The brake handle returns to its original position under the action of its own spring, releasing the vehicle from parking.

[0040] The above merely describes preferred embodiments of the present application, and for those skilled in the art, changes can be made in the specific embodiments and application ranges according to the spirit of the present application, and the content of the specification should not be understood as limiting the present application.

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 to the brake handle seat, the brake handle being connected to a brake wire, characterized in that: A ratchet block (40) is fixed on the brake handle, and a pawl (50) and a shifting hand (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 provided between the shifting hand and the pawl. When the shifting hand rotates clockwise, the elastic potential energy of the spring combination is partially released, which can drive the pawl to move closer to the ratchet block; when the shifting hand rotates counterclockwise, the spring combination drives the pawl away from the ratchet block. The pawl (50) is hinged to the brake handle seat (20) through a pawl hinge shaft (51), and 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. The end of the dial hand (60) is provided with a dial rod (61), which 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 dial rod. One end of the torsion spring that is against the dial rod is bent and extends into the limit chamber to be against one end of the telescopic spring.

2. The labor-saving ratchet multi-stage parking structure according to claim 1, 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.

3. 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 pawl (50) can be matched with any tooth groove.

4. The labor-saving ratchet-type multi-stage parking structure according to claim 1, characterized in that: A fan-shaped groove (62) is provided 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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