A drum brake rocker arm for a scooter

Abstract

The utility model relates to the technical field of brake, disclose a drum brake swing arm for scooter, including by the cavity type swing arm body of lower main body and upper main body upper and lower interval setting, swing arm body one end is equipped with the through camshaft hole, the other end is equipped with the through brake cable fitting hole, swing arm body is close to the camshaft hole one side top and is equipped with the opening groove that communicates with the camshaft hole, and the lower main body of opening groove one side and the side surface of upper main body are fixedly provided with the locking nut of locking screw adaptation. Overcome the drum brake for scooter in the prior art through adjusting swing arm stroke to repair its normal use, due to the adjustment operation space limitation, the problem that the assembly and disassembly and stroke adjustment operation are inconvenient and easy to cause the component loss.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, specifically to a drum brake rocker arm for a scooter. Background Technology

[0002] The shared scooter market is developing rapidly both domestically and internationally. Currently, rocker arms are commonly used in scooter drum brakes, such as those described in CN108180235B (a type of vehicle-mounted balanced fixed drum brake) and CN202010883951.3 (a type of electric scooter hub brake). These rocker arm structures typically use fastening screws and / or nuts to connect the rocker arm and camshaft together. Due to frequent vehicle use, the wear on the brake shoes increases, leading to frequent adjustments and tightening of the drum brake stroke. Otherwise, new brakes need to be replaced for effective braking, which increases the operating costs for customers.

[0003] Therefore, to ensure the continued usability of the brake shoes, the drum brakes of scooters can be restored to normal operation by adjusting the rocker arm stroke, thereby improving the scooter's operational efficiency and safe braking performance. However, when the wear of the brake shoes increases and adjustment is required, the fastening screws and / or nuts must be disassembled and loosened before adjustment can be performed. This is inconvenient, and the disassembled screws or nuts may sometimes be lost during the adjustment process, affecting reassembly. Furthermore, the fastening nuts often loosen or even come out during use, greatly affecting the reliability of the rocker arm operation. At the same time, during assembly, the nuts need to be tightened on the other side of the rocker arm. The limited operating space increases the difficulty of assembling the fastening screws and nuts, affecting assembly efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a drum brake rocker arm for scooters, which overcomes the problems of inconvenient assembly, disassembly, and stroke adjustment operations, and the easy loss of parts, when adjusting the stroke of the rocker arm to restore normal use of the drum brake of a scooter, due to the limited adjustment space.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This utility model is a drum brake rocker arm for a scooter, including a cavity-type rocker arm body with a lower body and an upper body spaced apart vertically. One end of the rocker arm body is provided with a through camshaft hole, and the other end is provided with a through brake cable mounting hole. The top of the rocker arm body near the camshaft hole is provided with an opening groove communicating with the camshaft hole. On one side of the lower body and the upper body, a locking nut adapted to a locking screw is fixedly provided on one side of the opening groove.

[0007] A further improvement is that a support connection is provided between the lower body and the upper body inside the locking nut, the support connection is provided with a limiting groove adapted to the locking nut, and the lower body and the upper body are provided with a fixing part adapted to the locking nut.

[0008] A further improvement is that the lower body, upper body, and supporting connection are integrally formed.

[0009] A further improvement is that a limiting support part connecting the lower body and the upper body is also provided on one side of the top of the opening groove.

[0010] A further improvement is that the limiting support part is an integrally formed structure with the lower body or the upper body, and the other end is fixedly connected to the lower body or the upper body.

[0011] A further improvement is that the lower body and the upper body are provided with a supporting reinforcement part connecting the lower body and the upper body on the top side near the brake cable mounting hole.

[0012] A further improvement is that the supporting reinforcement is designed as an integral structure with the lower or upper main body, and the other end is fixedly connected to the lower or upper main body.

[0013] A further improvement is that the lower main body is a planar structure, the side projection of the upper main body is a curved structure, the two ends of the curved structure are respectively set parallel to the lower main body, and the downward projection surface of the upper main body coincides with the lower main body.

[0014] A further improvement is that: a drum brake including the drum brake rocker arm for scooters as described in the claim, further includes a brake housing assembly and a brake shoe assembly connected to the rocker arm body on the other side of the brake housing assembly via a camshaft, wherein the brake housing assembly is provided with a brake cable connection support structure corresponding to the brake cable mounting hole.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] This application features a cavity-type rocker arm body with a lower and upper body spaced vertically apart. A through camshaft hole and a brake cable mounting hole are provided at corresponding positions at both ends of the rocker arm body. An opening slot communicating with the camshaft hole is provided at the top of the camshaft hole. Locking nuts, adapted to locking screws, are fixed to one side of the lower and upper bodies at positions corresponding to the opening slots. When the wear of the brake shoes increases, requiring adjustment and tightening of the drum brake stroke to meet braking performance, the locking screw is loosened and the position of the rocker arm body relative to the camshaft is adjusted. Then, the locking screw installed on the other side of the rocker arm body tightens the camshaft inserted into the camshaft hole. Since the locking nut is fixed to one side of the lower and upper bodies, adjustment only requires loosening the screw against one side of the lower and upper bodies to rotate and adjust the stroke, preventing separation of the screw and nut. No additional tools are needed for adjustment and locking, and there are no space requirements for adjustment. Disassembly and assembly are quick and easy, and stroke adjustment is convenient and fast, improving efficiency in disassembly, assembly, and stroke adjustment.

[0017] By setting support connection parts, limit support parts and support reinforcement parts at different positions between the lower body and the upper body, the overall strength is improved, making it safer and more reliable. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the other side of this utility model;

[0020] Figure 3 This is an exploded structural diagram of the present invention;

[0021] Figure 4 This is a schematic diagram of the assembly structure according to one embodiment of the utility model.

[0022] Attached image labels:

[0023] Rocker arm body 1; lower body 11; upper body 12; support reinforcement 13; limiting support 14;

[0024] Camshaft hole 2; Brake cable mounting hole 3; Locking nut 4; Opening groove 5; Support connection part 6; Limiting groove 61; Fixing part 62; Locking screw 7; Brake housing assembly 8; Brake shoe assembly 9; Brake cable connection support structure 81. Detailed Implementation

[0025] To enhance understanding of this utility model, it will be further described in detail below with reference to the accompanying drawings. This embodiment is only used to explain this utility model and does not constitute a limitation on the scope of protection of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the combination or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0028] like Figure 1-4 As shown, an embodiment of a scooter drum brake rocker arm is provided, including a cavity-type rocker arm body 1 consisting of a lower body 11 and an upper body 12 spaced apart vertically. One end of the rocker arm body 1 is provided with a through camshaft hole 2, and the other end is provided with a through brake cable mounting hole 3. The top of the rocker arm body 1 near the camshaft hole 2 is provided with an opening groove 5 communicating with the camshaft hole 2. On one side of the opening groove 5, the lower body 11 and the upper body 12 are fixed with a locking nut 4 adapted to the locking screw 7. When the wear of the brake shoes increases, causing the travel of the drum brake to need to be adjusted and tightened to meet the braking performance, after loosening the locking screw 7 and rotating the rocker arm body 1 relative to the camshaft, the locking screw 7 installed on the other side of the rocker arm body will tighten and lock the camshaft that passes through the camshaft hole 2. Since the locking nut 4 is fixed on the side of the lower body 11, the upper body 12 and the opening slot 5 corresponding to each other, the rocker arm travel can be adjusted by simply loosening the locking screw 7 that abuts against one side of the rocker arm body. This will not cause the screw and nut to separate and fall off. At the same time, no other tools are needed to adjust and tighten. There are no requirements for the adjustment operation space. The adjustment operation is convenient and quick, and it also improves the efficiency of disassembly and assembly.

[0029] An optional implementation: To improve the overall strength of the rocker arm body 1 and the connection strength with the locking nut 4, such as... Figure 1-3 As shown, a support connection 6 is provided between the lower body 11 and the upper body 12 inside the locking nut 4. The support connection 6 is provided with a limiting groove 61 adapted to the locking nut 4, and the lower body 11 and the upper body 12 are provided with a fixing part 62 adapted to the locking nut 4. The locking nut 4 and the fixing part 62 are fixed by welding. The setting of the limiting groove 61 can limit the locking nut 4, reduce the assembly difficulty, and improve the assembly efficiency. Preferably, the lower body 11, the upper body 12 and the support connection 6 are integrally formed structures, which increases the overall strength and structural stability of the lower body 11 and the upper body 12.

[0030] An alternative implementation: such as Figure 1-3As shown, a limiting support part 14 is also provided on one side of the top of the opening groove 5 to connect the lower body 11 and the upper body 12; the limiting support part 14 can enhance the connection strength of one end of the opening groove 5, and at the same time can also play a limiting and blocking role for the locking screw 7 inserted inside; preferably, the limiting support part 14 is an integrally formed structure with the lower body 11 or the upper body 12, and the other end is fixedly connected to the lower body 11 or the upper body 12 by welding.

[0031] An alternative implementation: such as Figure 1-3 As shown, the lower body 11 and the upper body 12 are also provided with a supporting reinforcement part 13 on the top side near the brake cable mounting hole 3, connecting the lower body 11 and the upper body 12; preferably, the supporting reinforcement part 13 is an integrally formed structure with the lower body 11 or the upper body 12, and the other end is fixedly connected to the lower body 11 or the upper body 12 by welding. The supporting reinforcement part 13 improves the overall structural connection strength and stability of the lower body 11 and the upper body 12.

[0032] An alternative implementation: such as Figure 1-3 As shown, the lower body 11 is a planar structure, and the side projection of the upper body 12 is a curved structure. The two ends of the curved structure are set parallel to the lower body 11 respectively. An arc-shaped transition reinforcement structure is set between the two ends of the curved structure, and the downward projection surface of the upper body 12 coincides with the lower body 11.

[0033] A drum brake that includes a drum brake rocker arm for scooters, such as Figure 4 As shown, it also includes a brake housing assembly 8 and a brake shoe assembly 9 connected to the rocker arm body 1 on the other side of the brake housing assembly 8 via a camshaft. The brake housing assembly 8 is provided with a brake cable connection support structure 81 corresponding to the brake cable mounting hole 3.

[0034] Additionally, the rocker arm structure of this utility model can also be used on other types of drum brakes for easier assembly and stroke adjustment.

[0035] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A drum brake rocker arm for a scooter, characterized in that: The device includes a cavity-type rocker arm body (1) consisting of a lower body (11) and an upper body (12) spaced apart vertically. One end of the rocker arm body (1) has a through camshaft hole (2), and the other end has a through brake cable mounting hole (3). The top of the rocker arm body (1) near the camshaft hole (2) has an opening groove (5) communicating with the camshaft hole (2). On one side of the opening groove (5), the lower body (11) and the upper body (12) are fixed with a locking nut (4) that matches the locking screw (7).

2. The scooter drum brake rocker arm according to claim 1, characterized in that: A support connection part (6) is provided between the lower body (11) and the upper body (12) inside the locking nut (4). The support connection part (6) is provided with a limiting groove (61) adapted to the locking nut (4). The lower body (11) and the upper body (12) are provided with a fixing part (62) adapted to the locking nut (4).

3. The scooter drum brake rocker arm according to claim 2, characterized in that: The lower body (11), upper body (12) and supporting connection part (6) are integrally formed structures.

4. The scooter drum brake rocker arm according to claim 1, characterized in that: The top side of the opening groove (5) is also provided with a limiting support part (14) that connects the lower body (11) and the upper body (12).

5. The scooter drum brake rocker arm according to claim 4, characterized in that: The limiting support part (14) is an integrally formed structure with the lower body (11) or the upper body (12), and the other end is fixedly connected to the lower body (11) or the upper body (12).

6. The scooter drum brake rocker arm according to any one of claims 1-5, characterized in that: The lower body (11) and the upper body (12) are also provided with a support reinforcement part (13) connecting the lower body (11) and the upper body (12) on the top side near the brake cable mounting hole (3).

7. The scooter drum brake rocker arm according to claim 6, characterized in that: The supporting reinforcement (13) is designed to be integrally formed with the lower body (11) or the upper body (12), and the other end is fixedly connected to the lower body (11) or the upper body (12).

8. The scooter drum brake rocker arm according to claim 7, characterized in that: The lower body (11) is a planar structure, and the side projection of the upper body (12) is a curved structure. The two ends of the curved structure are respectively set parallel to the lower body (11), and the downward projection surface of the upper body (12) coincides with the lower body (11).

9. A drum brake comprising the drum brake rocker arm for a scooter as described in claim 8, characterized in that: It also includes a brake housing assembly (8) and a brake shoe assembly (9) connected to the other side of the brake housing assembly (8) via a camshaft and a rocker arm body (1). The brake housing assembly (8) is provided with a brake cable connection support structure (81) corresponding to the brake cable mounting hole (3).

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