Anti-falling piston component of brake master cylinder
By designing an anti-disengagement groove with a wedge structure on the brake master cylinder piston, the piston spring can be directly screwed on, solving the problems of complex assembly and high cost in the existing technology, and achieving the effects of simplified assembly and cost reduction.
Patent Information
- Application Number
- CN202422529583.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-19
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-10-19
AI Technical Summary
The existing assembly process for brake master cylinder piston components involves riveting, gluing, or the use of spring limit seats, which increases assembly time and parts costs.
The anti-slip design with a wedge structure eliminates the need for riveting and gluing processes by installing a piston spring at the piston root. The piston spring with the anti-slip structure is directly screwed onto the piston, simplifying the assembly process.
This simplifies the assembly process, reduces assembly and parts costs, and ensures the piston return function, thus meeting product performance requirements.
Smart Images
Figure CN223781935U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive braking system technology, specifically the components of the brake master cylinder assembly, and particularly relates to an anti-disengagement piston component for the brake master cylinder. Background Technology
[0002] The brake master cylinder, a crucial component of the automotive braking system, primarily functions to transmit pedal force, converting it into hydraulic pressure, and distributing this pressure to the wheels to achieve braking through friction. After braking, the master cylinder piston returns to its original position, as does the brake pedal. The key component enabling this piston return is the piston spring. The piston spring, along with the piston and other parts, forms the piston assembly. Piston assemblies are available in riveted, screw-on, and hook-on types, and are mounted on the brake master cylinder assembly to achieve piston return, ensuring the brake pedal automatically returns to its original position after the driver depresses it.
[0003] like Figure 3 The riveted piston component shown requires a roller riveting machine to complete; as... Figure 4 The threaded piston assembly shown is a threaded structure, which can loosen during the movement of the brake master cylinder. Therefore, anaerobic adhesive needs to be applied to the threads to prevent loosening. Figure 5 The attached piston component shown needs to be assembled into a spring component and requires two limit seats. The above disadvantages include the need for riveting, gluing, or spring limit seats, which increases assembly time and parts costs. Summary of the Invention
[0004] This utility model provides an anti-disengagement piston component for a brake master cylinder to solve the problem that the existing processes of riveting, gluing, or spring limit seats increase assembly time and part costs.
[0005] The technical solution adopted by this utility model is to include a piston spring and a piston, with the piston spring installed in the anti-dislodgement groove at the root of the piston.
[0006] The anti-detachment groove is a wedge structure formed by an oblique angle A.
[0007] The wedge structure has an angle A ≥ 6°.
[0008] The height L of the inclined side in the wedge structure is (0.5~0.6)d, where d is the diameter of the piston spring wire.
[0009] The brake master cylinder assembly adopts this utility model.
[0010] The advantages of this utility model are its novel structure and anti-dislodgement structure. It can be achieved simply by manually screwing the piston spring directly onto the piston to form the piston component. It is simple and easy to implement. Compared with riveting, tightening, and hanging methods, it eliminates the riveting and gluing processes, as well as the spring limit seat, thus reducing assembly and parts costs. In the brake master cylinder assembly, this piston component is installed inside the master cylinder body and connected to the piston through the piston spring to ensure the piston returns to its original position. The function meets the product performance requirements. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 This is an enlarged view of part I of this utility model;
[0014] Figure 3 This is a structural schematic diagram of a riveted piston component;
[0015] Figure 4 This is a schematic diagram of the structure of a threaded piston assembly;
[0016] Figure 5 This is a structural schematic diagram of a hook-on piston assembly;
[0017] Figure 6 This is a schematic diagram of the brake master cylinder assembly with this utility model installed. Detailed Implementation
[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0019] like Figure 1 As shown, it includes piston spring 1 and piston 2, with piston spring 1 installed in the anti-disengagement groove at the root of piston 2.
[0020] The anti-detachment groove is a wedge structure formed by an oblique angle A.
[0021] like Figure 2 As shown, the oblique angle A in the wedge structure is ≥ 6°.
[0022] like Figure 2 As shown, the height L of the inclined side in the wedge structure is (0.5~0.6)d, where d is the diameter of the piston spring wire.
[0023] like Figure 6 As shown, the brake master cylinder assembly of this utility model is adopted.
[0024] Working principle:
[0025] The piston spring 1 is manually screwed onto the piston 2. A certain force is required to release the piston spring from the piston via the anti-disengagement groove at the piston root. After installation, a pull-out force test is performed, and the spring meets the requirements. This structure has also passed durability testing. The piston assembly is then installed inside the main cylinder, connected to the piston via the piston spring, ensuring piston return to its original position. This functionality meets product performance requirements.
[0026] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, any equivalent substitutions or modifications made by those skilled in the art based on the technical solution and the inventive concept of the present invention within the scope of the technical concept disclosed in the present invention shall all fall within the scope of protection of the present invention.
Claims
1. An anti-disengagement piston component for a brake master cylinder, characterized in that: Includes a piston spring and a piston, with the piston spring installed in an anti-disengagement groove at the root of the piston; The anti-detachment groove is a wedge structure formed by an angled A. The oblique angle A in the wedge structure is ≥6°; The height L of the inclined side in the wedge structure is (0.5~0.6)d, where d is the diameter of the piston spring wire.
2. A brake master cylinder assembly employing the anti-disengagement piston component as described in claim 1.