A type of nylon brake pad and electric vehicle hub brake

Abstract

This utility model discloses a nylon brake pad and an electric vehicle hub brake, relating to the field of electric vehicle hub brake technology. It includes a housing with rotatably mounted shoe blocks and a gourd-shaped transmission cam. The shoe blocks are symmetrically arranged about the transmission cam, and a contact wheel is rotatably mounted on each shoe block, abutting against the waist of the transmission cam. The shoe blocks are partially arc-shaped nylon parts, with the outer arc surface of the shoe block serving as the working surface. This utility model provides a nylon brake pad and an electric vehicle hub brake. By using nylon shoe blocks, the weight of the shoe blocks is reduced, improving vehicle handling agility. Furthermore, the nylon shoe blocks effectively absorb vibrations during braking, reducing the probability of abnormal noise and improving user comfort.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle hub brake technology, specifically a nylon brake pad and an electric vehicle hub brake. Background Technology

[0002] As is generally known, the hub brake of an electric vehicle is the actuator of the rear wheel braking system. The hub brake contains shoe brake pads, which rub against the brake drum to achieve wheel braking.

[0003] For example, the utility model patent with application announcement number CN222615869U, application announcement date of March 14, 2025, and titled "An Electric Vehicle Hub Brake", includes a brake housing with a brake chamber on one side and an outer surface on the opposite side; it also includes symmetrically arranged shoe blocks, the first end of which is rotatably connected to a shoe pin fixedly installed in the brake chamber; it also includes a transmission component that is driven to rotate to drive the second end of the two shoe blocks with an adjustable distance; a gear is rotatably mounted on the second end of the shoe block via a pin; the transmission component is a gear drive shaft, and the gear and the gear drive shaft are meshed.

[0004] The shortcoming of the existing technology is that it uses the rotation of the brake shoe to move away from the brake drum to achieve frictional deceleration and braking. However, the existing brake shoes are often made of metal, which makes the shoes heavy and generates a lot of noise when the metal shoes rub against the brake drum. Utility Model Content

[0005] The purpose of this invention is to provide a nylon brake pad and an electric vehicle hub brake to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a nylon brake pad, comprising a housing on which a shoe block and a gourd-shaped transmission cam are rotatably disposed, the shoe block being symmetrically arranged about the transmission cam, and a contact wheel being rotatably disposed on the shoe block abutting against the waist of the transmission cam, the shoe block being a partially arc-shaped nylon component, and the outer arc surface of the shoe block being the working surface.

[0007] As a further description of the above technical solution: the shoe block is provided with a U-shaped receiving groove, which can be divided into an arc-shaped part and a straight part. The arc-shaped part is arranged coaxially with the contact wheel, and the openings of the straight part all face the waist of the transmission cam.

[0008] As a further description of the above technical solution: a connecting groove is provided in the hoof block, the first end of the connecting groove is connected to the working surface of the hoof block, and the second end of the connecting groove is connected to the receiving groove along the tangent direction of the arc-shaped part of the receiving groove.

[0009] As a further description of the above technical solution: an inner groove is provided in the arc-shaped part of the receiving groove, and the opening side of the inner groove faces the second end of the connecting groove.

[0010] As a further description of the above technical solution: heat dissipation grooves are formed in a circumferential array on the side of each shoe block.

[0011] As a further description of the above technical solution: the working surface of the hoof block is provided with striped engraved patterns.

[0012] An electric vehicle hub brake, comprising the nylon brake pads described in the above-mentioned solution.

[0013] In the above technical solution, the present invention provides a nylon brake pad and an electric vehicle hub brake, which utilizes nylon brake shoes to reduce the weight of the brake shoes and improve the vehicle's handling flexibility. Secondly, the nylon brake shoes can effectively absorb the vibration during braking, reduce the probability of abnormal noise, and reduce the noise during braking, thereby improving user comfort. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0016] Figure 2 A schematic cross-sectional view of the overall structure provided for an embodiment of this utility model;

[0017] Figure 3 An overall exploded structural diagram provided for an embodiment of this utility model;

[0018] Figure 4 Provided for the embodiments of this utility model Figure 2 A magnified view of the local structure at point A in the middle.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Housing; 2. Transmission cam; 21. Rocker arm; 3. Shoe; 31. Connecting part; 32. Receiving groove; 33. Connecting groove; 34. Inner groove; 4. Contact wheel. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] Please see Figure 1-4 The present invention provides a technical solution comprising a housing 1, on which a shoe block 3 and a gourd-shaped transmission cam 2 are rotatably disposed. The shoe block 3 is symmetrically arranged about the transmission cam 2, and a contact wheel 4 is rotatably disposed on the shoe block 3 to abut against the waist of the transmission cam 2. The shoe block 3 is a partially arc-shaped nylon part, and the outer arc surface of the shoe block 3 is the working surface.

[0023] Preferably, a connecting part 31 is fixedly provided on the hoof block 3, through which a tension spring can be installed between the two hoof blocks 3, and the tension spring is used to keep the two hoof blocks 3 rotating relative to each other and moving closer together, such as... Figure 1 As shown, the shoe blocks 3 are symmetrically rotatably mounted on the housing 1, while the drive cam 2 is welded with a rocker arm 21. A contact wheel 4 is rotatably mounted at the end of each shoe block 3. The drive cam 2 is located between the two shoe blocks 3, causing both contact wheels 4 to abut against the two sides of the drive cam 2. When the drive cam 2 is driven to rotate via the rocker arm 21, the drive cam 2 presses against the contact wheels 4. This causes the contact wheels 4 to rotate, and the two shoe blocks 3 rotate away from each other, causing the working surfaces of the shoe blocks 3 to move outwards and expand to contact the brake drum, thereby achieving a braking effect.

[0024] The shoe block 3 is made of nylon. Compared with the ordinary metal shoe block 3, the nylon shoe block 3 is lighter, which can reduce the mass of the tension spring and improve the vehicle's handling agility. Secondly, the nylon shoe block 3 can effectively absorb the vibration during braking, reduce the probability of abnormal noise, and reduce the noise during braking, thus improving the comfort of use.

[0025] In the above technical solution, the nylon shoe block 3 is used to reduce the weight of the shoe block 3 and improve the vehicle's handling flexibility. Secondly, the nylon shoe block 3 can effectively absorb the vibration during braking, reduce the probability of abnormal noise, and reduce the noise during braking, thereby improving the user comfort.

[0026] In another embodiment of the present invention, a U-shaped receiving groove 32 is provided on the shoe block 3. The receiving groove 32 can be divided into an arc-shaped part and a straight part. The arc-shaped part is arranged coaxially with the contact wheel 4, and the openings of the straight part are all facing the waist of the transmission cam 2.

[0027] Preferred, such as Figure 2As shown, the receiving groove 32 is U-shaped and can be divided into an arc-shaped part and a straight part according to its shape. The arc-shaped part is arranged coaxially with the contact wheel 4, and the openings of the straight part all face the waist of the transmission cam 2. Since the transmission cam 2 and the contact wheel 4 are hard metal wheels, rust and impurities will inevitably be generated on the transmission cam 2 and the contact wheel 4 during use. The rust and impurities are easy to get stuck between the shoe block 3 and the waist of the transmission cam 2, which will cause movement resistance between the transmission cam 2 and the shoe block 3, increasing the rotational force required by the transmission cam 2, thus causing the brake to feel sticky in subjective use. When the transmission cam 2 is driven to rotate by the rocker arm 21, the transmission cam 2 can squeeze the rust and impurities on both sides of its waist into the receiving groove 32. The presence of the receiving groove 32 reduces the interference of the rust and impurities on the transmission cam 2 and the contact wheel 4 on the brake operation and improves the stability of the shoe block 3 when braking.

[0028] In another embodiment of the present invention, a connecting groove 33 is provided in the hoof block 3. The first end of the connecting groove 33 is connected to the working surface of the hoof block 3, and the second end of the connecting groove 33 is connected to the receiving groove 32 along the tangent direction of the arc-shaped part of the receiving groove 32.

[0029] Preferred, such as Figure 2 As shown, the end of the connecting groove 33 facing away from the contact wheel 4 is the first end, and the end of the connecting groove 33 facing the contact wheel 4 is the second end. The first end of the connecting groove 33 connects to the working surface of the shoe 3, while the second end of the connecting groove 33 connects to the receiving groove 32. When water accumulates inside the hub brake, the water on the working surface of the shoe 3 can be quickly discharged to the outside of the working surface through the connecting groove 33, thereby reducing the interference of water accumulation on the working surface of the shoe 3 on the braking performance.

[0030] When the transmission cam 2 rotates to drive the two shoe blocks 3 to rotate away from each other, the working surface of the shoe block 3 contacts the brake drum. At this time, the water on the working surface of the shoe block 3 is squeezed into the receiving groove 32 from the connecting groove 33, and the water flows out along the opening of the straight part of the receiving groove 32, and flushes out the rust and impurities in the arc-shaped part of the receiving groove 32, thus cleaning and discharging the rust and impurities.

[0031] In another embodiment of the present invention, an inner groove 34 is provided in the arc-shaped portion of the receiving groove 32, and the opening side of the inner groove 34 faces the second end of the connecting groove 33.

[0032] Preferred, such as Figure 4 As shown, the inner groove 34 is located inside the arc-shaped portion of the receiving groove 32, and the opening side of the inner groove 34 faces the second end of the connecting groove 33, so that the inner groove 34 is used to accommodate the rust impurities in the arc-shaped portion of the receiving groove 32, preventing the rust impurities from falling onto the working surface of the shoe block 3 along the connecting groove 33 and causing brake noise, thus improving the stability of brake use.

[0033] In another embodiment of this utility model, heat dissipation grooves are arranged in a circumferential array on the side of the hoof block 3.

[0034] Preferably, heat dissipation grooves are arranged in a circumferential array on the side of the hoof block 3 to increase the air circulation speed, accelerate the heat dissipation on the hoof block 3, and improve the stability of the hoof block 3 under high load working conditions.

[0035] In another embodiment of this utility model, the working surface of the hoof block 3 is provided with striped engraved patterns.

[0036] Preferably, striped engraved patterns are provided on the working surface of the hoof block 3 to increase the friction area of ​​the hoof block 3 and promote chip removal, thereby further improving the stability of the hoof block 3 in use.

[0037] Working principle:

[0038] When the rocker arm 21 drives the transmission cam 2 to rotate, the transmission cam 2 presses against the contact wheel 4. This causes the contact wheel 4 to rotate along with it, and the two shoe blocks 3 rotate away from each other, causing the working surfaces of the shoe blocks 3 to move outward and expand to contact the brake drum, thereby achieving the braking effect. The transmission cam 2 can squeeze the rust and impurities on both sides of its waist into the receiving groove 32. The presence of the receiving groove 32 reduces the interference of the rust and impurities on the transmission cam 2 and the contact wheel 4 on the braking operation. At this time, the water on the working surface of the shoe block 3 is squeezed into the receiving groove 32 from the connecting groove 33, and the water flows out along the straight opening of the receiving groove 32, flushing out the rust and impurities in the arc-shaped part of the receiving groove 32.

[0039] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A nylon brake shoe comprising a housing (1), a shoe (3) and a transmission cam (2) in the shape of a gourd are rotatably arranged on the housing (1), the shoe (3) is symmetrically arranged about the transmission cam (2), and a contact wheel (4) is rotatably arranged on the shoe (3) and abuts the waist of the transmission cam (2), characterized in that, The hoof block (3) is a partially arc-shaped nylon part, and the outer arc surface of the hoof block (3) is the working surface.

2. A nylon brake pad as claimed in claim 1, wherein The shoe block (3) has a U-shaped receiving groove (32), which can be divided into an arc-shaped part and a straight part. The arc-shaped part is arranged coaxially with the contact wheel (4), and the opening of the straight part faces the waist of the transmission cam (2).

3. A nylon brake pad according to claim 2, wherein The hoof block (3) has a connecting groove (33) inside. The first end of the connecting groove (33) is connected to the working surface of the hoof block (3), and the second end of the connecting groove (33) is connected to the receiving groove (32) along the tangent direction of the arc-shaped part of the receiving groove (32).

4. A nylon brake pad as claimed in claim 3, wherein The receiving groove (32) has an inner groove (34) in its arc-shaped portion, and the opening side of the inner groove (34) faces the second end of the connecting groove (33).

5. A nylon brake pad as defined in claim 1, wherein The sides of the hoof block (3) are provided with heat dissipation grooves arranged in a circular array.

6. A nylon brake pad as defined in claim 1, wherein The working surface of the hoof block (3) is provided with striped engraved patterns.

7. An electric motor vehicle hub brake, characterized by Includes the nylon brake pads described in any one of claims 1-6 above.

Images