Piston assembly of double-piston brake

Abstract

The utility model belongs to the technical field of brakes, and particularly relates to a piston assembly of a double-piston brake, which comprises a brake main body and a brake component arranged in the brake main body, the brake body comprises a shell, a hydraulic flow channel arranged in the shell and a main piston assembled in the shell. The brake assembly comprises a friction mechanism arranged on the main piston and a heat dissipation mechanism arranged in the friction mechanism. The friction mechanism comprises an assembly hole formed in the middle of the main piston and an auxiliary piston clamped in the assembly hole. According to the stepped brake device, through the brake assembly, when hydraulic oil is input into the hydraulic flow channel, the main piston can be pushed to move, then the second friction plate tightly presses a vehicle disc for braking, when oil pressure in the hydraulic flow channel continues to be increased, the spring deforms, the auxiliary piston further tightly presses the vehicle disc, and the brake effect is improved; and meanwhile, the effects of reducing noise, suppressing vibration and reducing the braking temperature rise rate are achieved.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, specifically to a piston assembly of a dual-piston brake. Background Technology

[0002] A brake is a device that functions to decelerate, stop, or maintain a stopped state of moving parts. It is a mechanical part that stops or decelerates moving parts in machinery, commonly known as a brake or brake system. A brake mainly consists of a frame, braking components, and an operating mechanism.

[0003] Existing dual-piston brake piston assemblies have certain defects in use. For example, the rigid contact between the piston and the friction pad during braking generates high-frequency vibration noise, which affects the driving experience. In addition, the friction pad generates a lot of heat during braking, and if the heat is not dissipated in time, it will shorten the life of the friction pad. At the same time, the piston is generally used for single braking, and the braking effect at high speed needs to be further improved. Therefore, we propose a piston assembly for a dual-piston brake. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A piston assembly for a dual-piston brake includes: a brake body and a brake assembly disposed within the brake body; the brake body includes a housing, a hydraulic flow channel disposed within the housing, and a main piston assembled within the housing; the brake assembly includes a friction mechanism disposed on the main piston and a heat dissipation mechanism disposed within the friction mechanism; the friction mechanism includes an assembly hole opened in the middle of the main piston, a secondary piston fitted into the assembly hole, a spring connecting the end of the secondary piston and the main piston, a back plate fixed to the secondary piston, a friction plate fixed to the back plate, a damping plate embedded in the main piston, a back plate connected to the outside of the damping plate, a second friction plate fixed to the damping plate, and a central hole opened in the middle of the second friction plate.

[0007] In a preferred embodiment, the present invention can be further configured such that the heat dissipation mechanism includes heat dissipation grooves correspondingly formed on the inner sides of the first friction plate and the second friction plate, and heat dissipation holes formed in the middle of the first friction plate.

[0008] In a preferred embodiment, the present invention can be further configured such that: the back of the friction pad two is provided with a positioning strip inserted into the back plate two.

[0009] In a preferred embodiment, the present invention can be further configured such that a sealing ring is provided on the side of the assembly hole.

[0010] In a preferred embodiment, the present invention can be further configured such that the damping sheet has a three-layer composite structure, with a porous aluminum silicate fiber layer in the middle and silicon carbide wear-resistant layers covering both sides.

[0011] In a preferred embodiment, the present invention can be further configured such that the end face of the second friction plate protrudes 2-5mm from the end face of the first friction plate, forming a stepped difference.

[0012] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0013] 1. This utility model uses a brake assembly. When hydraulic oil is input into the hydraulic channel, it pushes the main piston to move, thereby causing the friction pads to press tightly against the vehicle disc for braking. When the oil pressure in the hydraulic channel continues to increase, the spring deforms, causing the auxiliary piston to press further against the vehicle disc, thus improving the braking effect. This solution adopts a stepped braking system, which can also reduce noise and vibration, as well as reduce the rate of brake temperature rise.

[0014] 2. This utility model, through the brake assembly, can use shock absorbers to transmit braking force to the back plate, changing the existing rigid contact to a flexible contact, thereby absorbing vibration energy and reducing noise.

[0015] 2. This utility model, through heat dissipation grooves and heat dissipation holes, can effectively dissipate the heat generated by friction between friction plate one and friction plate two, thereby extending the service life of friction plate one and friction plate two. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the piston assembly of the dual-piston brake of this utility model;

[0017] Figure 2 This is a schematic diagram of the friction plate II structure of this utility model.

[0018] Figure label:

[0019] 100. Brake body; 110. Housing; 120. Hydraulic flow channel; 130. Main piston;

[0020] 200. Brake assembly; 210. Mounting hole; 211. Sealing ring; 220. Secondary piston; 230. Spring; 240. Backing plate one; 250. Friction pad one; 260. Shock absorber; 270. Backing plate two; 280. Friction pad two; 281. Positioning strip; 290. Center hole;

[0021] 310. Heat dissipation groove; 320. Heat dissipation hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0023] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0024] The piston assembly of a dual-piston brake provided by some embodiments of the present invention is described below with reference to the accompanying drawings.

[0025] Combination Figure 1-2 As shown, the present invention provides a piston assembly for a dual-piston brake, comprising: a brake body 100 and a brake assembly 200 disposed within the brake body 100. The brake body 100 includes a housing 110, a hydraulic flow channel 120 disposed within the housing 110, and a main piston 130 assembled within the housing 110.

[0026] The brake assembly 200 includes a friction mechanism disposed on the main piston 130 and a heat dissipation mechanism disposed within the friction mechanism. The friction mechanism includes an assembly hole 210 formed in the middle of the main piston 130, a secondary piston 220 fitted into the assembly hole 210, a spring 230 connecting the end of the secondary piston 220 to the main piston 130, a back plate 240 fixed to the secondary piston 220, a friction plate 250 fixed to the back plate 240, a damping plate 260 embedded in the main piston 130, and a damping plate 260 connected to the damping plate 250. The outer back plate 270, the friction plate 280 fixed on the damping plate 260, and the central hole 290 in the middle of the friction plate 280 are connected by the brake assembly 200. When hydraulic oil is input into the hydraulic channel 120, it pushes the main piston 130 to move, thereby causing the friction plate 280 to press tightly against the vehicle disc for braking. When the oil pressure in the hydraulic channel 120 continues to increase, the spring 230 deforms, causing the auxiliary piston 220 to further press tightly against the vehicle disc, improving the braking effect. This scheme adopts a stepped braking system, which can also reduce noise and vibration, as well as reduce the braking temperature rise rate.

[0027] Furthermore, the heat dissipation mechanism includes heat dissipation grooves 310 corresponding to the inner sides of the first friction plate 250 and the second friction plate 280, and heat dissipation holes 320 in the middle of the first friction plate 250. Through the heat dissipation grooves 310 and the heat dissipation holes 320, the heat generated by the friction between the first friction plate 250 and the second friction plate 280 can be effectively dissipated, thereby extending the service life of the first friction plate 250 and the second friction plate 280.

[0028] On the other hand, the back of the second friction plate 280 is provided with a positioning strip 281 that is inserted into the second back plate 270, which can facilitate the installation of the second friction plate 280 and make its installation more stable.

[0029] Furthermore, a sealing ring 211 is provided on the side of the assembly hole 210, which can improve the sealing between the auxiliary piston 220 and the main piston 130 and prevent hydraulic oil leakage.

[0030] Furthermore, the damping pad 260 has a three-layer composite structure, with a porous aluminum silicate fiber layer in the middle and silicon carbide wear-resistant layers on both sides. The damping pad 260 transmits the braking force to the back plate 270, changing the existing rigid contact to a flexible contact, thereby absorbing vibration energy and reducing noise.

[0031] It should be noted that the end face of the second friction pad 280 protrudes 2-5mm from the end face of the first friction pad 250, forming a stepped difference. This allows the second friction pad 280 to contact the brake disc first during braking, and the first friction pad 250 to contact the brake disc when the braking force is increased, further improving the driving performance.

[0032] The working principle and usage process of this utility model are as follows: First, when braking, hydraulic oil enters the hydraulic flow channel 120 and pushes the main piston 130 to move, causing the friction plate 280 to press tightly against the brake disc for braking. When more hydraulic oil enters the hydraulic flow channel 120, the spring 230 is compressed and deformed, causing the friction plate 250 to press tightly against the brake disc, further increasing the braking force. At the same time, the heat generated by braking is dissipated from the heat dissipation groove 310 and heat dissipation hole 320, ensuring normal operation.

[0033] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A piston assembly of a dual piston brake, characterized in that The utility model relates to a brake device, including: The brake device comprises a brake body (100) and a brake assembly (200) arranged in the brake body (100); The brake body (100) comprises a shell (110), a hydraulic flow channel (120) arranged in the shell (110) and a main piston (130) assembled in the shell (110); The brake assembly (200) comprises a friction mechanism arranged on the main piston (130) and a heat dissipation mechanism arranged in the friction mechanism; The friction mechanism comprises an assembly hole (210) opened in the middle of the main piston (130), a secondary piston (220) clamped in the assembly hole (210), a spring (230) connected between the end of the secondary piston (220) and the main piston (130), a back plate one (240) fixed on the secondary piston (220), a friction plate one (250) fixed on the back plate one (240), a damping sheet (260) embedded on the main piston (130), a back plate two (270) connected to the outer side of the damping sheet (260), a friction plate two (280) fixed on the damping sheet (260) and a middle hole (290) opened in the middle of the friction plate two (280).

2. A piston assembly for a dual piston brake according to claim 1, wherein, The heat dissipation mechanism comprises heat dissipation grooves (310) corresponding to the inner sides of the friction plate one (250) and the friction plate two (280) and heat dissipation holes (320) opened in the middle of the friction plate one (250).

3. A piston assembly for a dual piston brake as defined in claim 1, wherein, The back surface of the friction plate two (280) is provided with a positioning strip (281) inserted on the back plate two (270).

4. A piston assembly for a dual piston brake as defined in claim 1, wherein, The side surface of the assembly hole (210) is provided with a sealing ring (211).

5. A piston assembly for a dual piston brake as defined in claim 1, wherein, The damping sheet (260) is a three-layer composite structure, the middle layer is a porous aluminum silicate fiber layer, and both sides are covered with a silicon carbide wear-resistant layer.

6. A piston assembly for a dual piston brake as defined in claim 1, wherein, The end surface of the friction plate two (280) protrudes the end surface of the friction plate one (250) by 2-5mm, forming a step difference.

Images