First piston component of brake master cylinder assembly

Abstract

The utility model relates to a first piston component of a brake master cylinder assembly, and belongs to a center valve type brake master cylinder component in the technical field of automobile brake systems. Comprising a first spring part, a spring check ring, a check ring, a main leather cup, a valve element part, a valve body part and a first piston, a first piston spring in the first spring part after point riveting is in interference fit with a small convex circular truncated cone of a first spring seat, and the spring check ring and the check ring limit a center valve spring of the valve element part. The center valve brake master cylinder assembly has the advantages that the structure is novel, after the structure of the first piston component is optimized, compared with a conventional first piston component, the requirement for the sizes of a first spring seat and a first piston in a small cylinder diameter phi 19.05 mm assembly is met, then the design of the first piston part of the center valve brake master cylinder assembly with the cylinder diameter phi 19.05 mm is achieved, and good operability is achieved; related module design and modular standard design of an original design platform can be utilized, and the center valve brake master cylinder assembly can be applied to center valve brake master cylinder assemblies with various strokes and the cylinder diameter phi of 19.05 mm.

Description

Technical Field

[0001] This utility model belongs to the field of automotive braking system technology, specifically a center valve type brake master cylinder component, and particularly relates to a first piston component of a brake master cylinder assembly, which is mainly used in the braking systems of passenger cars and microcars. Background Technology

[0002] Existing conventional center-valve brake master cylinders used for automotive braking have cylinder diameters of Φ20.64mm, Φ22.2mm, Φ23.81mm, and Φ25.4mm, respectively. Figure 9 As shown, the main components consist of the main cylinder block 3, the first piston assembly 2, the second piston assembly 1, the main piston cup, and the auxiliary piston cup. Figure 5 , 6 As shown in Figures 7 and 8, the first spring component 1 includes (spring limiting seat 6, small washer 7, spring limiting rod 8, first spring seat 9, and first piston spring 10), the valve core component 2 includes (center valve spring and center valve core), the valve body component 3, the main piston cup 4, and the first piston 5. In the first spring component 1, after being riveted, the first piston spring 10 is interference-fitted with the four protruding outer circles of the first spring seat 9. After the first spring seat 9 and the first piston 5 are assembled, the first spring component 1 forms the first piston component, which assists the first piston in completing its movement to achieve pressure build-up during operation.

[0003] Currently, due to the vehicle matching requirements of the OEM, a new brake master cylinder assembly with a cylinder diameter of Φ19.05mm is required. In the original platform design, the smallest cylinder diameter is Φ20.64mm. While ensuring the original design of the valve core component and valve body component, the outer diameter of the first spring seat after the design is Φ18.8mm, and the gap between it and the main bore size of the cylinder diameter of Φ19.05mm is 0.25mm. The gap is less than 1mm, which is unreasonable. Therefore, if the first piston component in the center valve brake master cylinder assembly is designed according to the original platform, it will not meet the design requirements of the center valve brake master cylinder assembly with a cylinder diameter of Φ19.05mm. Summary of the Invention

[0004] This utility model provides a first piston component of a brake master cylinder assembly to meet the design requirements of a center valve brake master cylinder assembly with a cylinder diameter of Φ19.05mm.

[0005] The technical solution adopted by this utility model includes a first spring component, a spring retaining ring, a retaining ring, a main cup, a valve core component, a valve body component, and a first piston. The main cup is installed on the outside of the first piston head, and the valve core component and the valve body component are installed inside the first piston head. The first piston spring in the first spring component after being riveted is interference-fitted with the small convex truncated cone of the first spring seat. The spring retaining ring and the retaining ring limit the center valve spring of the valve core component.

[0006] The first spring component includes a first piston spring, a spring limiting seat, a spring seat connecting rod, a small washer, and a first spring seat. One end of the spring seat connecting rod is connected to the spring limiting seat, and the other end is connected to the first spring seat via the small washer. Both ends of the first piston spring are located on the spring limiting seat and the first spring seat.

[0007] The inner diameter of the first piston spring is Φ11mm.

[0008] The first spring seat has a small convex truncated cone with an outer diameter of Φ11.2mm, and the outer diameter of the first spring seat is Φ16.3mm.

[0009] The advantages of this utility model are its novel structure. After optimization, the structure of the first piston component meets the size requirements of the first spring seat and the first piston in the small cylinder diameter Φ19.05mm assembly compared with the conventional first piston component. This realizes the design of the first piston part of the center valve brake master cylinder assembly with a cylinder diameter of Φ19.05mm, and has good operability. It can be designed using relevant modules of the original design platform, and the modular standard design can be applied to center valve brake master cylinder assemblies with a cylinder diameter of Φ19.05mm for various strokes. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the first spring seat of this utility model;

[0012] Figure 3 This is a schematic diagram of the structure of the first piston spring of this utility model;

[0013] Figure 4 This is a schematic diagram of the structure of the central valve brake master cylinder assembly with a cylinder diameter of Φ19.05, which is composed of the present invention. The figure shows the master cylinder body 8 and the second piston component 9.

[0014] Figure 5 This is a schematic diagram of the existing first piston component;

[0015] Figure 6 This is a schematic diagram of the existing first spring seat;

[0016] Figure 7 yes Figure 6 EE sectional view;

[0017] Figure 8 This is a schematic diagram of the existing first piston spring;

[0018] Figure 9 This is a schematic diagram of the existing center valve type brake master cylinder structure. Detailed Implementation

[0019] The device includes a first spring component 1, a spring retaining ring 2, a retaining ring 3, a main cup 4, a valve core component 5, a valve body component 6, and a first piston 7. The main cup 4 is installed on the outside of the head of the first piston 7, and the valve core component 5 and the valve body component 6 are installed inside the head of the first piston 7. The first piston spring 101 in the first spring component 1, after being riveted, is interference-fitted with the small convex frustum 10501 of the first spring seat 105. The spring retaining ring 2 and the retaining ring 3 limit the movement of the central valve spring 501 of the valve core component 5.

[0020] The first spring component 1 includes a first piston spring 101, a spring limiting seat 102, a spring seat connecting rod 103, a small washer 104, and a first spring seat 105. One end of the spring seat connecting rod 103 is connected to the spring limiting seat 102, and the other end is connected to the first spring seat 105 via the small washer 104. Both ends of the first piston spring 101 are located on the spring limiting seat 102 and the first spring seat 105.

[0021] The inner diameter of the first piston spring is Φ11mm.

[0022] The first spring seat 105 has a small convex frustum 10501 with an outer diameter of Φ11.2mm, and the outer diameter of the first spring seat 105 is Φ16.3mm.

[0023] Working principle:

[0024] This utility model optimizes the structure of the first spring seat 105 mating point. After a large number of experiments and theoretical calculations, the final solution was determined to change the original outer diameter mating with the first piston spring 101 to a new small convex truncated cone 10501 mating with the first piston spring. The problem that the original spring limiting rod could not limit the center valve spring 501 due to this structural adjustment was solved by adding spring retaining ring 2 and retaining ring 3. At the same time, the relevant dimensions of the first piston 7 mating with it were adjusted.

[0025] The outer diameter of the first spring seat 105 was reduced, and a small raised truncated cone 10501 Φ11.2mm was added to limit the first piston spring 101. Correspondingly, the inner diameter of the first piston spring Φ11mm and the mating dimensions between the first piston and the first spring seat were adjusted. In addition, spring retaining rings 2 and 3 were added to limit the center valve spring 501, replacing the original spring limiting rod. At the same time, the mating dimensions of the first piston 7 were adjusted to achieve the design of the center valve brake master cylinder assembly with a cylinder diameter of Φ19.05mm, which meets the requirements of the OEM.

[0026] The design process of this utility model will be further explained below with reference to the accompanying drawings.

[0027] like Figure 5As shown, in the conventional piston assembly structure with a minimum cylinder diameter of Φ20.64mm, the first spring assembly after spot riveting has a diameter of Φ1.75mm. The inner diameter of the first piston spring is Φ15.2mm, which is interference-fitted with the four protruding outer diameters of the first spring seat (Φ15.5mm). The outer diameter of the first piston spring is Φ18.7mm. The first spring seat supports the first piston spring, and at this time, the outer diameter of the first spring seat is Φ18.8mm. The structure of the first piston spring and the first spring seat is as follows. Figure 8 , 6 As shown in Figure 7, the maximum diameter of the first spring component in this structure is Φ18.8mm, and the gap between it and the main bore with a cylinder diameter of Φ19.05mm is 0.25mm. A gap less than 1mm is unreasonable, therefore this structure cannot achieve the design of a brake master cylinder assembly with a cylinder diameter of Φ19.05mm. The brake master cylinder assembly structure is as follows... Figure 9 As shown.

[0028] The structure of the first piston component of this utility model, with a cylinder diameter of Φ19.05mm, is as follows: Figure 1 As shown. The first spring component 1, after being riveted, has a diameter of Φ1.75mm. The inner diameter of the first piston spring 101 (Φ11mm) is interference-fitted with the outer diameter of the small convex frustum 10501 of the first spring seat (Φ11.2mm). The outer diameter of the first piston spring is Φ14.5mm. The first spring seat supports the first piston spring, and at this time, the outer diameter of the first spring seat is Φ16.3mm. The clearance between the first spring seat and the main bore (Φ19.05mm) is 2.75mm, which is greater than 1mm, indicating a reasonable design. The structure of the first piston spring and the first spring seat is as follows. Figure 3 , 2 As shown, the brake master cylinder assembly is as follows Figure 4 As shown.

Claims

1. A first piston component of a brake master cylinder assembly, comprising a first spring component, a spring retaining ring, a retaining ring, a master cup, a valve core component, a valve body component, and a first piston, wherein the master cup is mounted on the outside of the first piston head, and the valve core component and the valve body component are mounted on the inside of the first piston head, characterized in that: The first piston spring in the first spring component after spot riveting is interference-fitted with the small convex truncated cone of the first spring seat, and the spring retainer and retainer limit the center valve spring of the valve core component.

2. The first piston component of a brake master cylinder assembly according to claim 1, characterized in that: The first spring component includes a first piston spring, a spring limiting seat, a spring seat connecting rod, a small washer, and a first spring seat. One end of the spring seat connecting rod is connected to the spring limiting seat, and the other end is connected to the first spring seat via the small washer. Both ends of the first piston spring are located on the spring limiting seat and the first spring seat.

3. The first piston component of a brake master cylinder assembly according to claim 2, characterized in that: The inner diameter of the first piston spring is Φ11mm.

4. The first piston component of a brake master cylinder assembly according to claim 2, characterized in that: The first spring seat has a small convex truncated cone with an outer diameter of Φ11.2mm, and the outer diameter of the first spring seat is Φ16.3mm.

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