A hub brake structure

Abstract

This application discloses a hub brake structure, which is connected to the rear frame of an electric bicycle and is used to generate braking force in conjunction with the braking part of the rear wheel hub. The structure includes: a pair of shoe blocks, the outer circumferences of which together form a nearly circular friction part that acts on the rear wheel hub; a shoe block fixing seat, which is a long strip-shaped steel structure with one end connected to the rear frame as a connecting end, and has a pivot hole for connecting the rear wheel hub shaft; one end of each shoe block is rotatably connected to the shoe block fixing seat; and a roller shaft structure, rotatably connected to the shoe block fixing seat, which acts on the other end of the two shoe blocks to drive them to rotate, causing the friction part to move closer to or further away from the braking part. This solves the problems of insufficient strength and insufficient heat dissipation in existing hub brakes.

Description

Technical Field

[0001] This application relates to the field of brakes for electric bicycles, and in particular to a hub brake structure. Background Technology

[0002] With the development of electric two-wheeler technology, significant breakthroughs have been made in the maximum speed of vehicles, making braking safety a major concern. Current traditional hub brakes use cast aluminum as the outer shell to surround the brake shoes, serving as both the mounting and heat dissipation components. However, the cast aluminum shell has relatively low strength and is prone to deformation, making it unsuitable for high-speed braking applications. Furthermore, the heat dissipation performance of the cast aluminum shell during high-speed braking remains insufficient, leading to severe brake fade. The applicant proposes improvements to address these issues. Utility Model Content

[0003] This application discloses a hub brake structure that solves the problems of insufficient strength and insufficient heat dissipation in existing hub brakes.

[0004] A hub brake structure, connected to the rear frame of an electric bicycle, is used to generate braking force in conjunction with the braking part of the rear wheel hub. It includes: a pair of shoe blocks, the outer circumferences of which together form a near-circular friction part that acts on the rear wheel hub; a shoe block mounting base, which is a long, strip-shaped steel structure with one end connected to the rear frame as a connecting end; the shoe block mounting base has a pivot hole for connecting the rear wheel hub shaft; one end of each shoe block is rotatably connected to the shoe block mounting base; and a roller shaft structure, rotatably connected to the shoe block mounting base, which acts on the other end of the two shoe blocks to drive them to rotate, causing the friction part to move closer to or further away from the braking part.

[0005] The steel structure of the shoe block fixing seat used in this application increases its strength and prevents it from deforming due to high-speed braking; at the same time, the shoe block fixing seat adopts a long strip structure, which is different from the traditional shield-shaped structure, and can increase the airflow through the shoe block and improve heat dissipation.

[0006] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0007] Optionally, the hoof block fixing seat has a limiting shaft on the side near the connecting end, and one end of the hoof block rotates around the outer circumference of the limiting shaft.

[0008] Optionally, the roller shaft structure is located on the side of the shoe block fixing seat away from the connecting end.

[0009] Optionally, the roller shaft structure includes a roller shaft and a rocker arm. The shoe block fixing seat has a first connecting hole for connecting the roller shaft. One end of the roller shaft passes through the first connecting hole and engages with the shoe block, while the other end is connected to the rocker arm.

[0010] Optionally, one end of the rocker arm is connected to the roller shaft, and the other end of the rocker arm is used to connect a brake cable to drive the roller shaft to rotate.

[0011] Optionally, the shoe block fixing seat is further provided with a brake line fixing seat, the brake line fixing seat being close to the connecting end of the shoe block fixing seat and located on the side away from the shoe block.

[0012] Optionally, the shoe block fixing seat also has a second connecting hole for the limiting shaft to pass through, one end of the limiting shaft is engaged with the shoe block, and the other end is connected to the brake cable fixing seat.

[0013] Optionally, the axes of the first connecting hole, the second connecting hole, and the rotating shaft hole are located in the same plane.

[0014] The beneficial effects of this application are as follows:

[0015] 1. The shoe block fixing seat is replaced with a steel structure to improve its strength and resist its own deformation when braking at high speed;

[0016] 2. Setting the hoof block fixing seat into a long strip shape can avoid obstructing the hoof block and affecting its heat dissipation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0018] Figure 2 This is an exploded view of an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the structure of the hoof fixing seat in one embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the structure of the hoof fixing seat in one embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the structure of the brake cable fixing seat in one embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the roller shaft structure in one embodiment of this application;

[0023] Figure 7 This is a schematic diagram of the rocker arm structure in one embodiment of this application;

[0024] Figure 8This is a schematic diagram of the hoof block structure in one embodiment of this application.

[0025] The annotations in the figure are explained as follows:

[0026] 1. Hoof block; 11. Friction part; 12a. First traction hole; 12b. Second traction hole;

[0027] 2. Shoe block fixing seat; 21. Rotary shaft hole; 22. Limiting shaft; 23. First connecting hole; 24. Brake cable fixing seat; 25. Second connecting hole; 26. Connecting end; 27. Slot;

[0028] 3. Roller shaft structure; 31. Roller shaft; 32. Rocker arm. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] refer to Figure 1 and Figure 2 In one embodiment of this application, a hub brake structure is disclosed, including a pair of shoe blocks 1, the shoe blocks 1 being semi-circular, the two shoe blocks 1 being mirror images of each other, and the outer periphery of both having friction portions 11, the friction portions 11 being nearly circular, for increasing the contact area with the rear wheel hub brake portion.

[0033] The shoe block 1 is movably connected to the shoe block fixing seat 2, and one end of the shoe block fixing seat 2 is connected to a roller shaft structure 3 for driving the two shoe blocks 1. When the roller shaft structure 3 rotates, it drives the two shoe blocks 1 to move outward, thereby causing the friction part 11 to approach and contact the rear wheel hub brake part.

[0034] To address the issue of insufficient strength of the shoe holder 2 during high-speed braking, in some embodiments, the shoe holder 2 is made of steel to enhance its strength.

[0035] One end of the shoe block fixing seat 2 is configured as a connecting end 26 for connecting to the frame of the two-wheeled electric vehicle. The shoe block fixing seat 2 is provided with a pivot hole 21 for the rear wheel hub pivot to pass through, so that the positional relationship between the shoe block fixing seat 2 and the rear wheel hub is relatively uniform.

[0036] refer to Figure 3 and Figure 4 A second connecting hole 25 and a limiting shaft 22 are provided on the side of the shoe block fixing seat 2 near the connecting end 26. The limiting shaft 22 is connected in the second connecting hole 25, and the shoe block 1 is rotatably connected to the limiting shaft 22. In some embodiments, one end of the shoe block 1 may be sleeved on the limiting shaft 22 and rotate around the limiting shaft 22 (not shown in the figure). In another embodiment, one end of the shoe block 1 is in contact with the outer periphery of the limiting shaft 22, and the two are slidably connected around the circumference of the limiting shaft 22.

[0037] Combination Figure 2 and Figure 8 As shown, each shoe block 1 has a rotating end that rotates around the limiting shaft 22 and a separating end that cooperates with the roller shaft structure 3. The roller shaft structure 3 acts on the separating end to drive the shoe block 1 to rotate around the rotating end.

[0038] It should be noted that a tension spring (not shown in the figure) is provided between the two hoof blocks 1, giving the two hoof blocks 1 a tendency to move closer to each other, such as... Figure 8 As shown, a first tension spring is provided between the two tension spring holes 12a, and a second tension spring is provided between the two tension spring holes 12b.

[0039] It should be further explained that an arc-shaped groove adapted to the diameter of the limiting shaft 22 is provided at the rotating end of the shoe block 1, which is used to slide in contact with the outer circumference of the limiting shaft 22. After the two shoes block 1 are in contact with the limiting shaft 22 in their respective arc-shaped grooves, a certain gap is reserved to allow the shoes block 1 to rotate around the limiting shaft 22, so as to avoid mutual interference and collision when the two rotate.

[0040] refer to Figure 3 and Figure 4 Limiting structures for connecting the frame are provided on both sides of the connecting end 26. For example... Figure 3 As shown, the connecting end 26 has a U-shaped limiting groove that opens towards the end on the side away from the shoe block, which is used to insert with the frame. The side walls on both sides of the limiting groove act on the frame to prevent deflection.

[0041] Furthermore, a recessed platform extending to the other side of the connecting end 26 is provided in the limiting groove, and a protrusion adapted to the recessed platform is provided on the frame. After entering the recessed platform, it cooperates with the side wall of the recessed platform to prevent the frame and the connecting end 26 from moving out along the direction of movement of the limiting groove opening, and also plays a further role in preventing deflection.

[0042] Furthermore, the side wall of the limiting groove has two through holes for the pins to pass through, which are used to connect the frame with the pins and limit the movement of the frame and the connecting end 26 along the opening of the recess. In addition, a through hole is provided in the recess to connect and lock the connecting end 26 to the frame with fasteners.

[0043] refer to Figure 6 and Figure 7 In some embodiments, a first connecting hole 23 for connecting the roller shaft structure 3 is provided at the end of the shoe block fixing seat away from the connecting end 26.

[0044] The roller shaft structure 3 includes a roller shaft 31 and a rocker arm 32. The roller shaft 31 partially passes through the first connecting hole 23, with its two ends located on both sides of the hoof block fixing seat 2. The end furthest from the hoof block serves as the connecting end, and the end closest to the hoof block serves as the driving end. The connecting end connects to the rocker arm 32, causing it to rotate, while the driving end acts on the two hoof blocks 1, driving the two hoof blocks to move.

[0045] like Figure 7 As shown, one end of the rocker arm 32 is used to connect to the roller shaft 31, and the other end is provided with a connection structure for connecting the brake cable.

[0046] Combination Figure 1 and Figure 7 In some embodiments, in order to fix the brake cable, a brake cable fixing seat 24 is also provided on the shoe block fixing seat 2. The brake cable fixing seat 24 is located near the connecting end 26 of the shoe block fixing seat 2 and is located on the side away from the shoe block 1.

[0047] Furthermore, such as Figure 3 As shown, the shoe block fixing seat 2 is provided with a slot 27 that is adapted to the brake cable fixing seat 24 for fixing the end of the brake cable fixing seat 24, and the end of the limiting shaft 22 passes through the second connecting hole 25 and connects to the brake cable fixing seat 24, increasing the overall integrity of the brake cable fixing seat 24 connection.

[0048] To address the issue of insufficient heat dissipation in traditional shielded hoof block holders, the hoof block holder 2 is designed as a long strip to increase heat dissipation.

[0049] Furthermore, to ensure that both shoe blocks 1 can simultaneously contact the braking part to form braking, the axes of the first connecting hole 23, the second connecting hole 25, and the rotating shaft hole 21 are located in the same plane. The driving end of the roller rotating shaft 31 drives the two shoe blocks 1 to move synchronously.

[0050] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0051] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A hub brake structure, connected to the rear frame of an electric bicycle, for use in conjunction with the braking part of the rear wheel hub to generate braking force, characterized in that, include, A pair of shoe blocks (1), the outer peripheries of the two shoe blocks (1) together form a near-circular friction part, the friction part acts on the rear wheel hub; The shoe block fixing seat (2) is a long strip steel structure with one end connected to the rear frame. The shoe block fixing seat (2) has a pivot hole (21) for connecting the rear wheel hub pivot. One end of the shoe block (1) is rotatably connected to the shoe block fixing seat (2). The roller shaft structure (3) is rotatably connected to the shoe block fixing seat (2) and acts on the other end of the two shoes (1) to drive the shoes (1) to rotate, so that the friction part is closer to or further away from the braking part.

2. The hub brake structure according to claim 1, characterized in that, The hoof block fixing seat (2) has a limiting shaft (22) on the side near the connecting end, and one end of the hoof block (1) rotates around the outer periphery of the limiting shaft (22).

3. The hub brake structure according to claim 2, characterized in that, The roller shaft structure (3) is located on the side of the shoe block fixing seat (2) away from the connecting end.

4. A hub brake structure according to claim 3, characterized in that, The roller shaft structure (3) includes a roller shaft (31) and a rocker arm (32). The hoof block fixing seat (2) has a first connecting hole (23) for connecting the roller shaft (31). The roller shaft (31) passes through the first connecting hole (23) and engages with the hoof block (1) at one end, and is connected to the rocker arm (32) at the other end.

5. A hub brake structure according to claim 4, characterized in that, One end of the rocker arm (32) is connected to the roller shaft (31), and the other end of the rocker arm (32) is used to connect the brake cable to drive the roller shaft (31) to rotate.

6. A hub brake structure according to claim 5, characterized in that, A brake line fixing seat (24) is also provided on the shoe block fixing seat (2). The brake line fixing seat (24) is close to the connecting end of the shoe block fixing seat (2) and located on the side away from the shoe block (1).

7. A hub brake structure according to claim 6, characterized in that, The shoe block fixing seat (2) also has a second connecting hole (25) through which the limiting shaft (22) passes. One end of the limiting shaft (22) is engaged with the shoe block (1), and the other end is connected to the brake line fixing seat (24).

8. A hub brake structure according to claim 6, characterized in that, The axes of the first connecting hole (23), the second connecting hole (25), and the rotating shaft hole (21) are located in the same plane.

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