A high load brake caliper piston
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG DAQING MACHINERY CO LTD
- Filing Date
- 2025-10-31
- Publication Date
- 2026-07-24
Smart Images

Figure CN224550674U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of brake caliper technology, and specifically relates to a high load-bearing brake caliper piston. Background Technology
[0002] Caliper pistons are components used to slow down or stop a car. When braking, high-pressure brake fluid pushes the piston inside the caliper, pressing the brake pads against the brake disc to produce a braking effect, thereby slowing down or stopping the car.
[0003] During use, the braking part of the piston body is prone to wear and tear, requiring regular replacement. Furthermore, the braking part and the main body of the traditional piston body are an integral structure, resulting in high replacement costs and hindering sustainable development. Summary of the Invention
[0004] The purpose of this invention is to address the aforementioned problems in the prior art by providing a wear-resistant and high-load-bearing brake caliper piston.
[0005] The objective of this utility model can be achieved through the following technical solution: A high-load-bearing brake caliper piston, comprising a brake caliper body, characterized in that piston assemblies are provided at both the upper and lower ends of the brake caliper body, the piston assembly comprising a piston body, a movable member, a connecting rod, an oil inlet pipe, and a return spring, the brake caliper body having an installation groove for mounting the piston assembly, a fixing part being provided within the groove of the brake caliper body, two connecting parts integrally provided at the lower end of the movable member, the two connecting parts moving up and down on the fixing part, an oil inlet hole being provided on the brake caliper body, the oil inlet pipe being provided at the upper end of the movable member and connected to the oil inlet hole, an oil filling space being provided within the movable member, the oil inlet pipe extending into the oil filling space to apply pressure to the movable member, and the return spring being provided between the movable member and the fixing part.
[0006] In the aforementioned high-load-bearing brake caliper piston, the connecting rod passes through the fixed part, the connecting rod is located at the upper end of the fixed part and connected to the movable part, and the other end of the connecting rod extends out of the mounting groove and is connected to the piston body.
[0007] In the aforementioned high-load-bearing brake caliper piston, one end of the return spring is connected to the movable part, and the other end of the return spring is connected to the fixed part. The piston assembly returns to its original position through the action of the return spring.
[0008] In the aforementioned high-load-bearing brake caliper piston, a sealing element is provided at the opening of the brake caliper body mounting groove.
[0009] Compared with existing technologies, the moving parts inside the piston assembly of this high-load-bearing brake caliper piston slide on the fixed part, avoiding contact between the moving parts and the brake caliper body, which would cause wear and reduce the service life of the brake caliper body. Attached Figure Description
[0010] Figure 1 This is a cross-sectional structural diagram of the present invention.
[0011] Figure 2 This is a schematic diagram of the piston assembly in this utility model.
[0012] In the diagram, 1. Brake caliper body; 2. Piston assembly; 3. Piston body; 4. Moving part; 5. Connecting rod; 6. Oil inlet pipe; 7. Return spring; 8. Fixing part; 9. Connecting part; 10. Seal. Detailed Implementation
[0013] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0014] like Figure 1 , Figure 2 As shown, this high-load-bearing brake caliper piston includes a brake caliper body 1. Piston assemblies 2 are provided at both the upper and lower ends of the brake caliper body 1. Each piston assembly 2 includes a piston body 3, a movable member 4, a connecting rod 5, an oil inlet pipe 6, and a return spring 7. The brake caliper body 1 has an installation groove for mounting the piston assembly 2. A fixing part 8 is provided within the groove of the brake caliper body 1. Two connecting parts 9 are integrally provided at the lower end of the movable member 4, and the two connecting parts 9 move up and down on the fixing part 8. An oil inlet hole is provided on the brake caliper body 1. The oil inlet pipe 6 is located at the upper end of the movable member 4 and connected to the oil inlet hole. An oil filling space is provided within the movable member 4. The oil inlet pipe 6 extends into the oil filling space to apply pressure to the movable member 4. The return spring 7 is located between the movable member 4 and the fixing part 8.
[0015] To elaborate further, when the brake caliper is working, hydraulic oil enters the oil filling space of the movable part 4 from the oil inlet pipe 6 and applies pressure to the movable part 4. The connecting part 9 moves downward, the return spring 7 is compressed, and the movable rod moves downward, causing the piston body 3 to move inward to perform braking. When the brake caliper stops working, the hydraulic oil returns, the return spring 7 rebounds, and the movable part 4 returns to its original position, causing the piston body 3 to return to its original position.
[0016] To elaborate further, the connecting rod 5 passes through the fixed part 8. The connecting rod 5 is located at the upper end of the fixed part 8 and is connected to the movable part 4. The other end of the connecting rod 5 extends out of the mounting groove and is connected to the piston body 3.
[0017] To elaborate further, one end of the return spring 7 is connected to the movable part 4, and the other end of the return spring 7 is connected to the fixed part 8. The piston assembly 2 is returned to its original position by the action of the return spring 7.
[0018] To elaborate further, a seal 10 is provided at the opening of the mounting groove of the brake caliper body 1.
[0019] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
[0020] Although this document frequently uses terms such as brake caliper body 1, piston assembly 2, piston body 3, moving part 4, connecting rod 5, oil inlet pipe 6, return spring 7, fixing part 8, connecting part 9, and seal 10 as shown in the figures, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.
Claims
1. A high-load-bearing brake caliper piston, comprising a brake caliper body (1), characterized in that, The brake caliper body (1) is provided with piston assemblies (2) at both the upper and lower ends. The piston assembly (2) includes a piston body (3), a movable part (4), a connecting rod (5), an oil inlet pipe (6), and a return spring (7). The brake caliper body (1) is provided with an installation groove for the piston assembly (2). The groove of the brake caliper body (1) is provided with a fixing part (8). The lower end of the movable part (4) is integrally provided with two connecting parts (9), and the two connecting parts (9) move up and down on the fixing part (8). The brake caliper body (1) is provided with an oil inlet hole. The oil inlet pipe (6) is provided at the upper end of the movable part (4) and connected to the oil inlet hole. The movable part (4) is provided with an oil filling space. The oil inlet pipe (6) extends into the oil filling space to apply pressure to the movable part (4). The return spring (7) is provided between the movable part (4) and the fixing part (8).
2. The high-load-bearing brake caliper piston according to claim 1, characterized in that, The connecting rod (5) passes through the fixed part (8). The upper end of the connecting rod (5) is connected to the movable part (4), and the other end of the connecting rod (5) extends out of the mounting groove and is connected to the piston body (3).
3. A high-load-bearing brake caliper piston according to claim 1, characterized in that, One end of the reset spring (7) is connected to the movable part (4), and the other end of the reset spring (7) is connected to the fixed part (8). The piston assembly (2) is returned to its original position by the action of the reset spring (7).
4. A high-load-bearing brake caliper piston according to claim 1, characterized in that, A sealing element (10) is provided at the opening of the mounting groove of the brake caliper body (1).