A wheel hub motor brake structure

Abstract

The utility model relates to a wheel hub motor brake structure, including a wheel hub and a brake disc, wherein the outer surface of the brake disc is rotatably connected to a brake caliper shell, an oil inlet pipe is fixed to the top of the brake caliper shell, an oil channel is arranged inside the brake caliper shell, piston friction blocks are slidably connected to the left and right ends of the inner side of the oil channel, and a limiting assembly is arranged on the opposite sides of the two piston friction blocks, the limiting assembly includes a sealing ring slidably connected to the outer surfaces of the two piston friction blocks, and the limiting assembly also includes two limiting blocks fixed to the front and rear ends of the piston friction blocks. The wheel hub motor brake structure, by providing a limiting assembly, makes it difficult for the piston friction blocks to fall off from the brake and deflect, avoids the phenomenon of poor braking effect, and avoids the situation of oil leakage, and can make the two piston friction blocks fit tightly with the brake disc, and can also provide reset stress for the piston friction blocks.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub motors, in particular to a wheel hub motor brake structure. Background Art

[0002] Electric vehicles are currently developing rapidly. Different from the traditional centralized drive motor layout, the distributed hub motor direct drive format is being actively researched both at home and abroad and has great potential to replace the current centralized layout.

[0003] The existing disc brake structure is large in size and is not convenient to be arranged in the wheel hub motor. In addition, braking will generate a lot of heat, which will have an adverse effect on the motor performance. A wheel hub motor brake structure is disclosed in a Chinese patent (Announcement No.: CN 219570691U) to solve the above problems. It is easy to be assembled on the wheel hub motor and arranged on the outside of the motor to avoid the heat generated by braking affecting the motor performance. The heat generated by braking can be dissipated in time and will not affect the motor. However, there is still a problem that the piston friction plate is easy to fall off the brake caliper. Since the piston in the above document is not provided with a limiting structure, when the hydraulic oil pushes the piston friction block to squeeze out, it is easy to loosen after long-term use, affecting the braking effect, and it is also easy to fall off the brake caliper. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hub motor brake structure, which has the advantages of not being easy to fall off, and solves the problem of easy falling off.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wheel hub motor brake structure, comprising a wheel hub and a brake disc, the outer surface of the brake disc is rotatably connected to a brake caliper housing, an oil inlet pipe is fixed to the top of the brake caliper housing, an oil channel is provided inside the brake caliper housing, piston friction blocks are slidably connected to the left and right ends of the inner side of the oil channel, and a limit assembly is provided on the opposite sides of the two piston friction blocks;

[0006] The limit assembly includes a sealing ring slidably connected to the outer surfaces of the two piston friction blocks, the limit assembly also includes two limit blocks fixed to the front and rear ends of the piston friction blocks, the limit assembly also includes four sliding grooves opened on the front and rear walls of the oil channel inner cavity, and the limit assembly also includes a pushing assembly arranged on the side opposite to the two piston friction blocks.

[0007] Furthermore, both left and right walls on the inner side of the brake caliper housing are provided with sliding holes, and the piston friction block penetrates the sliding holes to the inside of the oil channel and is slidably connected thereto.

[0008] Furthermore, the oil channel is C-shaped, and the sealing ring is located inside the oil channel and fixed thereto.

[0009] Furthermore, the limit block is located inside the slide slot, and the limit block is slidably connected to the slide slot.

[0010] Furthermore, the pushing assembly includes four hinged rods hingedly connected to the side opposite to the two piston friction blocks, and the pushing assembly also includes a vertical plate fixed to the left and right walls of the oil channel inner cavity, and two pressure plates are slidably connected inside the vertical plate, and two springs are fixed to the sides opposite to the upper and lower pressure plates, and connecting blocks for connecting to the hinged rods are fixed to the front and rear ends of the pressure plate.

[0011] Furthermore, the vertical plate is in the shape of a hollow rectangle, and sliding holes are provided at both the front and rear ends of the vertical plate. The pressure plate passes through the sliding holes to the outside of the vertical plate and is slidably connected thereto.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] The hub motor brake structure is provided with a limit position component, so that the piston friction block is not easy to fall off from the brake and is not easy to deviate, thereby avoiding the phenomenon of poor braking effect and oil leakage. It can also make the two piston friction blocks fit tightly with the brake disc and provide reset stress for the piston friction blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the side view of the inner cavity of the brake caliper of the utility model;

[0016] Figure 3 It is a schematic diagram of the internal structure of the vertical plate of the utility model.

[0017] In the figure: 1 wheel hub, 2 brake disc, 3 brake caliper housing, 4 oil inlet pipe, 5 oil channel, 6 piston friction block, 7 limit assembly, 701 sealing ring, 702 limit block, 703 slide groove, 704 hinge rod, 705 connecting block, 706 vertical plate, 707 pressure plate, 708 spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-2A wheel hub motor brake structure in this embodiment includes a wheel hub 1 and a brake disc 2. The outer surface of the brake disc 2 is rotatably connected to a brake caliper housing 3. An oil inlet pipe 4 is fixed to the top of the brake caliper housing 3. An oil channel 5 is provided inside the brake caliper housing 3. The oil channel 5 is connected to the oil inlet pipe 4. The left and right ends of the inner side of the oil channel 5 are slidably connected to piston friction blocks 6. A limit assembly 7 is provided on the opposite side of the two piston friction blocks 6.

[0020] See also Figure 2 The limiting assembly 7 in this embodiment includes a sealing ring 701 slidably connected to the outer surfaces of the two piston friction blocks 6, the limiting assembly 7 also includes two limiting blocks 702 fixed to the front and rear ends of the piston friction blocks 6, the limiting assembly 7 also includes four sliding grooves 703 opened on the front and rear walls of the inner cavity of the oil channel 5, and the limiting assembly 7 also includes a pushing assembly arranged on the side opposite to the two piston friction blocks 6.

[0021] Among them, sliding holes are opened on the left and right walls on the inner side of the brake caliper housing 3, and the piston friction block 6 passes through the sliding holes to the inside of the oil channel 5 and is slidably connected therewith, so that the piston friction block 6 can be moved out of the inner side of the brake caliper housing 3, and the two piston friction blocks 6 can be abutted against the brake disc 2; and the oil channel 5 is C-shaped, and the sealing ring 701 is located inside the oil channel 5 and fixed thereto, so as to ensure the sealing between the piston friction block 6 and the brake caliper housing 3 and avoid oil leakage.

[0022] In addition, the limit block 702 is located inside the slide groove 703, and the limit block 702 and the slide groove 703 are slidably connected, so that the limit block 702 can slide in the oil channel 5 through the slide groove 703, thereby limiting the piston friction block 6 and preventing the piston friction block 6 from falling off from the brake caliper housing 3.

[0023] See also Figure 2-3 The pushing assembly in this embodiment includes four hinged rods 704 hingedly connected to the side opposite to the two piston friction blocks 6, and the pushing assembly also includes a vertical plate 706 fixed to the left and right walls of the inner cavity of the oil channel 5, and two pressure plates 707 are slidably connected inside the vertical plate 706, and two springs 708 are fixed to the side opposite to the upper and lower pressure plates 707, and the front and rear ends of the pressure plates 707 are fixed with connecting blocks 705 for connecting to the hinged rods 704, and the opposite ends of the left and right groups of connecting blocks 705 are hingedly connected to the opposite ends of the left and right groups of hinged rods 704.

[0024] Secondly, the vertical plate 706 is a rectangular shape with a hollow interior, and sliding holes are provided at both the front and rear ends of the vertical plate 706. The pressure plate 707 passes through the sliding holes to the outside of the vertical plate 706 and is slidably connected thereto, so that the pressure plate 707 can slide inside the vertical plate 706, and the pressure plate 707 can be connected to the connecting block 705, so that the hinge rod 704 can push the pressure plate 707 to move through the connecting block 705.

[0025] The working principle of the above embodiment is:

[0026] When in use, the piston friction block 6 passes through the front and rear two groups of limit blocks 702, so that when the hydraulic oil pushes it to move, the piston friction block 6 is not easy to fall off from the brake caliper housing 3 or to deviate, thereby avoiding the phenomenon of poor braking effect; and the piston friction block 6 slides on the inner side of the sealing ring 701 to avoid oil leakage, and when the two piston friction blocks 6 are worn, the upper and lower groups of springs 708 push the upper and lower groups of pressure plates 707 to move relative to each other under the elastic force of the springs 708, so that the pressure plates 707 can drive the connecting blocks 705 to move, so that the left and right groups of connecting blocks 705 can push the two piston friction blocks 6 to move relative to each other through the left and right groups of hinged rods 704, thereby pushing the piston friction blocks 6 to move relative to each other, so that the two piston friction blocks 6 can fit closely with the brake disc 2, and can provide reset stress for the piston friction blocks 6.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wheel hub motor brake structure, comprising a wheel hub (1) and a brake disc (2), characterized in that: The outer surface of the brake disc (2) is rotatably connected to a brake caliper housing (3), an oil inlet pipe (4) is fixed to the top of the brake caliper housing (3), an oil channel (5) is provided inside the brake caliper housing (3), piston friction blocks (6) are slidably connected to the left and right ends of the inner side of the oil channel (5), and a limit assembly (7) is provided on the opposite sides of the two piston friction blocks (6); The limiting assembly (7) includes a sealing ring (701) slidably connected to the outer surfaces of the two piston friction blocks (6), the limiting assembly (7) also includes two limiting blocks (702) fixed to the front and rear ends of the piston friction blocks (6), the limiting assembly (7) also includes four sliding grooves (703) provided on the front and rear walls of the inner cavity of the oil channel (5), and the limiting assembly (7) also includes a pushing assembly arranged on the side opposite to the two piston friction blocks (6).

2. The wheel hub motor brake structure according to claim 1, characterized in that: The left and right walls inside the brake caliper housing (3) are both provided with sliding holes, and the piston friction block (6) penetrates the sliding holes to the inside of the oil channel (5) and is slidably connected thereto.

3. The wheel hub motor brake structure according to claim 1, characterized in that: The oil channel (5) is C-shaped, and the sealing ring (701) is located inside the oil channel (5) and fixed thereto.

4. The wheel hub motor brake structure according to claim 1, characterized in that: The limit block (702) is located inside the slide groove (703), and the limit block (702) and the slide groove (703) are slidably connected.

5. The wheel hub motor brake structure according to claim 1, characterized in that: The pushing assembly includes four hinged rods (704) hingedly connected to the sides opposite to the two piston friction blocks (6), and the pushing assembly also includes a vertical plate (706) fixed to the left and right walls of the inner cavity of the oil channel (5), and two pressure plates (707) are slidably connected inside the vertical plate (706), and two springs (708) are fixed to the sides opposite to the upper and lower pressure plates (707), and connecting blocks (705) for connecting to the hinged rods (704) are fixed to the front and rear ends of the pressure plates (707).

6. The wheel hub motor brake structure according to claim 5, characterized in that: The vertical plate (706) is in the shape of a hollow rectangle. Both the front and rear ends of the vertical plate (706) are provided with sliding holes. The pressing plate (707) passes through the sliding holes to the outside of the vertical plate (706) and is slidably connected thereto.

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