Reverse brake type stop push block mute structure

Abstract

The utility model relates to the technical field of reverse braking, in particular to a reverse braking type locking push block mute structure which comprises a mandrel, a braking cone, a locking push block body and a return spring, the braking cone is coaxially and fixedly arranged at one end of the mandrel in a sleeving mode, a lead screw of a flywheel seat is sleeved with the locking push block body in a threaded mode, and the return spring is arranged on the mandrel in a sleeving mode. One end of the return spring is fixedly connected to the brake cone, the end, close to the brake cone, of the stop push block body is coaxially and rotationally connected with a shaft sleeve base, the shaft sleeve base is arranged on the mandrel in a sliding and sleeving mode in the axial direction, and one end of the return spring is fixed to the shaft sleeve base. The shaft sleeve seat is additionally arranged at one end of the locking push block body, so that the end part of the return spring is fixedly mounted, the end part of the return spring is prevented from being in direct contact with the locking push block body, the rotating locking push block body and the shaft sleeve seat are prevented from moving relatively, and the possibility that abnormal sound is generated in the rotating process of the locking push block body is greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of coaster brakes, and in particular to a coaster brake type stop push block silent structure. Background Art

[0002] The hub, commonly known as the "hub barrel," is the barrel outside the axle that connects to the spokes and is also commonly called the axle skin. Hubs are divided into standard hubs and coaster hubs. Coaster hubs combine the hub and brake in one. When riding, pedaling forward propels the bike forward, while remaining motionless allows the bike to coast like a regular bike. When pedaling backward, the screw on the flywheel seat drives the brake pads out, applying the brake force.

[0003] The coaster brake hub in the prior art includes a core shaft, a brake cone coaxially fixedly sleeved on one end of the core shaft, a flywheel seat coaxially rotatably sleeved on the other end of the core shaft, a drum coaxially rotatably sleeved on the brake cone and the flywheel seat, and a stop push block built into the drum. The stop push block is threadedly sleeved on a screw rod on the flywheel seat, and the stop push block can slide along the axial direction. The brake cone is provided with a return spring sleeved on the core shaft, one end of the return spring is fixed on the brake cone, and the other end of the return spring directly abuts against the stop push block. When the stop push block moves forward, the stop push block rotates with the flywheel seat and the drum. The stop push block contacts one end of the return spring during rotation, which will produce a loud noise, so further improvement is needed. Utility Model Content

[0004] In order to reduce the possibility of noise generated during the rotation of the stop push block, the present application provides a coaster brake type stop push block silent structure.

[0005] The present application provides a coaster brake type stop block silent structure adopting the following technical solutions:

[0006] A coaster brake type stop push block silent structure includes a core shaft, a brake cone, a stop push block body and a return spring. The brake cone is coaxially fixedly sleeved on one end of the core shaft, the stop push block body is threadedly sleeved on the screw rod of the flywheel seat, the return spring is sleeved on the core shaft, one end of the return spring is fixedly connected to the brake cone, and the end of the stop push block body close to the brake cone is coaxially rotatably connected to the shaft sleeve seat, the shaft sleeve seat is axially slidably sleeved on the core shaft, and one end of the return spring is fixed to the shaft sleeve seat.

[0007] By adopting the above technical solution, a shaft sleeve seat is added to one end of the stop push block body for fixed installation of the end of the return spring, thereby avoiding direct contact between the end of the return spring and the stop push block body, so that the rotating stop push block body and the shaft sleeve seat move relative to each other, thereby greatly reducing the possibility of abnormal noise generated by the stop push block body during rotation.

[0008] Preferably, a rotation groove is coaxially formed on one end of the stop push block body close to the brake cone, and the shaft sleeve seat is embedded in the rotation groove.

[0009] By adopting the above technical solution, a rotation groove is provided on the end face of the stop push block body for the shaft sleeve seat to be rotatably embedded, so that the relative movement between the stop push block body and the shaft sleeve seat is smoother, further reducing the possibility of abnormal noise during rotation.

[0010] Preferably, the end surface of the sleeve seat close to the brake cone has a mounting groove, and the end of the return spring is inserted into the mounting groove.

[0011] By adopting the above technical solution, an additional installation slot is provided to provide sufficient installation space for the return spring.

[0012] Preferably, the shaft sleeve seat is a steel sleeve seat.

[0013] By adopting the above technical solution, the shaft sleeve seat is made of steel material, which improves the rigidity and wear resistance of the shaft sleeve seat. When the steel sleeve seat and the stop push block body rotate relative to each other, the noise generated is small, and the durability of the entire structure is enhanced.

[0014] Preferably, the outer peripheral wall of the sleeve seat is rotatably connected to a ball abutting against the inner peripheral wall of the rotating groove.

[0015] By adopting the above technical solution and adding balls, the relative movement between the sleeve seat and the stop push block body is smoother, effectively reducing the friction resistance between the two and further reducing the abnormal noise generated by the stop push block body during rotation.

[0016] Preferably, the end of the brake cone is detachably connected to a spring seat, the spring seat is coaxially sleeved and seated on the core shaft, and one end of the spring is fixedly connected to the spring seat.

[0017] Preferably, a limiting slot is axially provided at one end of the brake cone close to the stop push block, and a limiting pin protruding from the spring seat is fixed and inserted into the limiting slot.

[0018] By adopting the above technical solution, a limiting slot is axially opened on one end of the brake cone close to the stop push block, and a limiting pin is protruding and fixed on the spring seat and inserted into the limiting slot, ensuring that the spring seat is firmly installed on the brake cone, thereby realizing circumferential linkage between the spring seat and the brake cone.

[0019] Preferably, there are two limiting slots and they are symmetrically arranged along the axis of the brake cone.

[0020] By adopting the above technical solution, the installation stability of the spring seat on the brake cone is improved, ensuring the reliable positioning of the return spring during use.

[0021] In summary, the present invention has the following beneficial effects:

[0022] 1. A shaft sleeve seat is added at one end of the stop push block body for fixing the end of the return spring to avoid direct contact between the end of the return spring and the stop push block body. This allows the rotating stop push block body and the shaft sleeve seat to move relative to each other, thereby greatly reducing the possibility of abnormal noise generated by the stop push block body during rotation;

[0023] 2. The shaft sleeve seat is made of steel material, which improves the rigidity and wear resistance of the shaft sleeve seat. When the steel sleeve seat and the stop push block body rotate relative to each other, the noise generated is small, and the durability of the entire structure is enhanced;

[0024] 3. The addition of balls makes the relative movement between the sleeve seat and the stop push block body smoother, effectively reduces the friction resistance between the two, and further reduces the abnormal noise generated by the stop push block body during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a coaster brake type stop push block silent structure;

[0026] Figure 2 yes Figure 1 A local enlarged schematic diagram at point A;

[0027] Figure 3 It is a schematic diagram of the connection structure between the brake cone and the spring seat.

[0028] In the figure, 1. core shaft; 11. flywheel seat; 12. flywheel body; 2. brake cone; 21. limit slot; 22. brake shoe; 3. stop push block body; 31. rotation groove; 32. first abutting rough surface; 33. second abutting rough surface; 4. return spring; 5. drum; 6. spring seat; 61. sliding sleeve; 62. fixing ring plate; 63. limit pin; 7. shaft sleeve seat; 71. sliding ring plate; 72. connecting sleeve; 73. mounting groove. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] The embodiment of the present application discloses a coaster brake type stop push block silent structure, referring to Figure 1 , including a core shaft 1, a brake cone 2, a stop push block body 3 and a return spring 4.

[0031] Reference Figure 1 、 Figure 2The brake cone 2 is coaxially fixedly mounted on one end of the core shaft 1. The other end of the core shaft 1 is rotatably mounted with a flywheel seat 11. The core shaft 1 is coaxially provided with a drum 5 that rotatably mounts on the flywheel seat 11 and the brake cone 2. The flywheel seat 11 is coaxially fixedly mounted with a flywheel body 12 externally mounted on the drum 5. The end of the brake cone 2 near the stop thrust block body 3 is detachably connected to a spring seat 6. The spring seat 6 is a metal seat and includes a sliding sleeve 61 coaxially mounted on the core shaft 1 and a fixed ring plate 62 coaxially fixedly mounted on one end of the sliding sleeve 61.

[0032] Reference Figure 2 、 Figure 3 In this embodiment, the fixing ring plate 62 is pluggably engaged with the brake cone 2. Specifically, a limiting slot 21 is axially defined on the end surface of the brake cone 2 near the stop block. The limiting slot 21 communicates with the inner bore of the brake cone 2. Two limiting slots 21 are provided, symmetrically arranged along the axis of the brake cone 2. The fixing ring plate 62 has corresponding protrusions fixedly connected to the limiting pins 63 inserted into the limiting slots 21. In other embodiments, the fixing ring plate 62 can be screwed to the end surface of the brake cone 2.

[0033] The stopper body 3 is threadedly mounted on the screw of the flywheel seat 11. A rotation slot 31 is coaxially defined at one end of the stopper body 3, proximate the brake cone 2, and is rotatably connected to the inner bore of the stopper body 3. The stopper body 3 is provided with a sleeve seat 7, which is embedded in the rotation slot 31. The sleeve seat 7 is coaxially rotatably connected to the rotation slot 31. Specifically, the sleeve seat 7 is made of steel and includes a sliding ring plate 71 that coaxially slides onto the core shaft 1 and a connecting sleeve 72 that coaxially and fixedly fits onto the sliding ring plate 71. In this embodiment, the end face of the connecting sleeve 72 is flush with the end face of the stopper body 3. The outer circumferential wall of the connecting sleeve 72 abuts the inner circumferential wall of the rotation slot 31, while the end face of the sliding ring plate 71 abuts the inner wall of the rotation slot 31. A mounting slot 73 is formed between the inner circumferential walls of the sliding ring plate 71 and the connecting sleeve 72. In other embodiments, the outer peripheral wall of the connecting sleeve 72 is rotatably connected to a ball that abuts against the inner peripheral wall of the rotating groove 31 .

[0034] One end of the return spring 4 is fixedly connected to the end surface of the fixed ring plate 62, and the other end of the return spring 4 is fixedly connected to the end surface of the sliding ring plate 71. The conical surface of the brake cone 2 abuts against the brake shoe 22 built into the drum 5. The outer peripheral wall of the stop thrust block body 3 has a first abutting rough surface 32 for abutting against the inner peripheral wall of one end of the drum 5 and a second abutting rough surface 33 for abutting against the inner peripheral wall of one end of the brake shoe 22 to force the brake shoe 22 to expand and brake.

[0035] The implementation principle of the silent structure of a coasting brake stop push block in an embodiment of the present application is as follows: a shaft sleeve seat 7 is added to one end of the stop push block body 3 for fixed installation of the end of the return spring 4, avoiding direct contact between the end of the return spring 4 and the stop push block body 3, so that the rotating stop push block body 3 and the shaft sleeve seat 7 undergo relative movement, thereby greatly reducing the possibility of abnormal noise generated by the stop push block body 3 during rotation.

[0036] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A coaster brake type stop block silent structure, characterized by: The invention comprises a core shaft (1), a brake cone (2), a stop push block body (3) and a return spring (4), wherein the brake cone (2) is coaxially fixedly sleeved on one end of the core shaft (1), the stop push block body (3) is threadedly sleeved on a screw rod of a flywheel seat (11), the return spring (4) is sleeved on the core shaft (1), one end of the return spring (4) is fixedly connected to the brake cone (2), one end of the stop push block body (3) close to the brake cone (2) is coaxially rotatably connected to a shaft sleeve seat (7), the shaft sleeve seat (7) is axially slidably sleeved on the core shaft (1), and one end of the return spring (4) is fixed to the shaft sleeve seat (7).

2. The coaster brake stop block silent structure according to claim 1, characterized in that: A rotation groove (31) is coaxially formed on one end of the stop push block body (3) close to the brake cone (2), and the shaft sleeve seat (7) is embedded in the rotation groove (31).

3. The coaster brake stop block silent structure according to claim 1, characterized in that: The end surface of the shaft sleeve seat (7) close to the brake cone (2) has a mounting groove (73), and the end of the return spring (4) is inserted into the mounting groove (73).

4. The coaster brake stopper and push block silent structure according to claim 1, characterized in that: The shaft sleeve seat (7) is a steel sleeve seat.

5. The coaster brake stop block silent structure according to claim 2, characterized in that: The outer peripheral wall of the shaft sleeve seat (7) is rotatably connected to a ball that abuts against the inner peripheral wall of the rotating groove (31).

6. The coaster brake stop block silent structure according to claim 1, characterized in that: The end of the brake cone (2) is detachably connected to a spring seat (6), the spring seat (6) and the coaxial sleeve seat (7) are arranged on the core shaft (1), and one end of the spring is fixedly connected to the spring seat (6).

7. The coaster brake stop block silent structure according to claim 6, characterized in that: The brake cone (2) is provided with a limiting slot (21) along the axial direction at one end close to the stop push block, and a limiting pin (63) is protruding and fixed on the spring seat (6) and inserted into the limiting slot (21).

8. The coaster brake stopper and push block silent structure according to claim 7, characterized in that: The limiting slots (21) are provided with two and are symmetrically arranged along the axis of the brake cone (2).

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