A non-metallic limit rod connecting spring-type piston component for brake master cylinder

Abstract

This utility model relates to a non-metallic limiting rod hook-spring type piston component for a brake master cylinder, belonging to the field of brake master cylinder assembly components in the automotive braking system technology field. The lower opening of the spring seat is located in the piston, and the opening end of the limiting rod is located in the upper opening of the spring seat, hooking the inner wall of the upper opening of the spring seat with a protrusion at the opening end. The spring is sleeved between the limiting end of the limiting rod and the spring seat. The advantages are its novel structure; the non-metallic limiting rod hook-spring seat design allows for simple press-fitting, eliminating the need for riveting equipment and adhesive application. The spring component has undergone tensile testing and passed strength tests, meeting product performance requirements. Assembly is simple and easy, reducing tooling costs, and it has been widely applied in product manufacturing.

Description

Technical Field

[0001] This utility model belongs to the field of automotive braking system technology, specifically brake master cylinder assembly components, and particularly relates to a non-metallic limit rod hook spring-type piston component for a brake master cylinder. Background Technology

[0002] The brake master cylinder is a major subassembly in the automotive braking system. Its main function is to transmit pedal force and convert it into hydraulic pressure, which is then distributed to the wheels to achieve braking through friction. After braking, when the pedal is in position, the master cylinder piston returns to its original position. The key component for this piston return is the spring assembly, which can be either riveted or screwed on. Specifically, the automatic piston return device after braking is installed in the brake master cylinder assembly, ensuring continuous hydraulic pressure during vehicle operation to achieve the braking function.

[0003] like Figure 4 The image shows a riveted spring component, which requires a roller riveting machine for manufacturing, thus increasing equipment investment. Figure 5 The image shows a threaded piston assembly. Since the threaded structure can loosen during the operation of the master cylinder, anaerobic adhesive needs to be applied to the threads to prevent loosening. Summary of the Invention

[0004] This utility model provides a non-metallic limit rod hook spring-type piston component for brake master cylinder, which solves the problem that current piston components require riveting or anaerobic adhesive to be applied to the threads to prevent loosening, resulting in increased tooling and processes.

[0005] The technical solution adopted by this utility model includes a piston, a limiting rod, a spring, and a spring seat. The lower opening of the spring seat is located in the piston, the opening end of the limiting rod is located in the upper opening of the spring seat and hooks the inner wall of the upper opening of the spring seat with the protrusion of the opening end, and the spring is sleeved between the limiting end of the limiting rod and the spring seat.

[0006] The limiting rod is made of non-metallic material.

[0007] The limiting rod includes an open end, an open end protrusion, a limiting end, and a rod body, wherein one end of the rod body is the limiting end and the other end is the open end, and there is an open end protrusion on the front of the open end, the outer side of which is a conical surface.

[0008] The open end closes through the protrusion and enters the upper opening of the spring seat. After passing through the hole, it opens the closed protrusion due to its own elasticity and hooks onto the inner wall of the upper opening of the spring seat.

[0009] The spring resistance ensures a stable connection between the spring, the limiting rod, and the spring seat, forming a spring component.

[0010] The advantages of this utility model are its novel structure. Through a non-metallic limiting rod and spring seat hook-and-loop design, it can be achieved with only simple press-fitting tooling, making it simple and easy to implement. It eliminates the need for riveting equipment and gluing processes. The key to achieving this hook-and-loop design is the installation and fit between the open-type non-metallic limiting rod and the spring seat. The fit between the limiting rod and the limiting seat is designed with a conical opening structure, allowing for stable insertion during press-fitting. After the opening closes and passes through the limiting seat hole and through the hole, it springs open again. Relying on the spring's resistance, the spring, limiting rod, and spring seat are stably connected to form a spring component. This spring component has undergone tensile testing and passed the strength test. This structure has also passed durability testing and can meet the product performance requirements. Assembly is simple and easy, and tooling costs are reduced. It has already been widely applied in product manufacturing. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the spring component of this utility model; Figure 3 This is a schematic diagram of the structure of this utility model applied in the brake master cylinder assembly; Figure 4 This is a structural schematic diagram of an existing riveted piston assembly; Figure 5 This is a structural schematic diagram of an existing threaded piston assembly. Detailed Implementation

[0012] like Figure 1 As shown, the device includes a piston 1, a limiting rod 2, a spring 3, and a spring seat 4. The lower opening of the spring seat 4 is located in the piston 1. The opening end 201 of the limiting rod 2 is located in the upper opening 401 of the spring seat 4 and hooks the inner wall of the upper opening 401 of the spring seat 4 with the protrusion 202 of the opening end. The spring 3 is sleeved between the limiting end 203 of the limiting rod 2 and the spring seat 4.

[0013] The limiting rod 2 is made of non-metallic material.

[0014] like Figure 2 As shown, the limiting rod 2 includes an open end 201, an open end protrusion 202, a limiting end 203, and a rod body 204. One end of the rod body 204 is the limiting end 203, and the other end is the open end 201. The front of the open end 201 has an open end protrusion 202, and the outside of the open end protrusion 202 is a conical surface 20201.

[0015] like Figure 2 As shown, the open end 201 enters the upper opening 401 of the spring seat 4 after closing through the open end protrusion 202. After passing through the hole, it opens the closed open end protrusion 202 by its own elasticity and hooks onto the inner wall of the upper opening 401 of the spring seat 4.

[0016] like Figure 2 As shown, the resistance of the spring 3 ensures a stable connection between the spring 3, the limiting rod 2, and the spring seat 4, forming a spring component.

[0017] Working principle The key to achieving the hook-up is the non-metallic open-type limiting rod structure and its mating structure with the spring seat mounting point. The mating point between the limiting rod and the spring seat is designed as an open conical protrusion structure, which is stably poured in during the press-fitting process. The opening closes and passes through the spring seat hole, then springs open and hooks together. Relying on the spring's resistance, the spring, limiting rod, and spring seat are stably connected to form the spring component. The spring component undergoes tensile testing and its strength is qualified. This structure has also passed durability testing. After assembling the spring component and piston, it is used in the brake master cylinder, such as... Figure 3 This allows for a convenient and quick return of the master cylinder piston.

Claims

1. A non-metallic limit rod connecting a spring-loaded piston component to a brake master cylinder, characterized in that: It includes a piston, a limiting rod, a spring, and a spring seat. The lower opening of the spring seat is located in the piston. The opening of the limiting rod is located in the upper opening of the spring seat and hooks the inner wall of the upper opening of the spring seat with a protrusion at the opening end. The spring is sleeved between the limiting end of the limiting rod and the spring seat.

2. The non-metallic limit rod connecting spring-type piston component of the brake master cylinder according to claim 1, characterized in that: The limiting rod is made of non-metallic material.

3. A non-metallic limit rod connecting spring-type piston component for a brake master cylinder according to claim 1 or 2, characterized in that: The limiting rod includes an open end, an open end protrusion, a limiting end, and a rod body, wherein one end of the rod body is the limiting end and the other end is the open end, and there is an open end protrusion on the front of the open end, the outer side of which is a conical surface.

4. A non-metallic limit rod connecting spring-type piston component for a brake master cylinder according to claim 3, characterized in that: The open end closes through the protrusion and enters the upper opening of the spring seat. After passing through the hole, it opens the closed protrusion due to its own elasticity and hooks onto the inner wall of the upper opening of the spring seat.

5. A non-metallic limit rod connecting spring-type piston component for a brake master cylinder according to claim 1, characterized in that: The spring resistance ensures a stable connection between the spring, the limiting rod, and the spring seat, forming a spring component.

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