Valve body and pressure cylinder connecting and sealing structure in electric control braking system

Abstract

The utility model relates to a valve body and pressure cylinder connecting and sealing structure in an electric control braking system, and belongs to the field of electric control braking systems of automobile braking systems. The pressure cylinder is fixedly connected with the valve body through a bolt, the pressure cylinder and the valve body are respectively in interference fit at the liquid path joint of the pressure cylinder and the valve body through a connecting seat, and the connecting seat is respectively and simultaneously sealed with the pressure cylinder and the valve body in the radial direction and the axial direction. The utility model has the advantages that the structure is novel, the pressure cylinder and the valve body are connected together through the connecting seat, and the connecting seat, the pressure cylinder and the valve body are simultaneously subjected to double sealing in the radial direction and the axial direction, so that the reliable connection of the pressure cylinder and the valve body is ensured, the sealing can be ensured even if very high pressure is established in the pressure cylinder, the structure can bear 35MPa liquid pressure, the sealing structure is reliable, and the service life is long. The product leakage risk is reduced, and the product sealing performance is improved.

Description

Technical Field

[0001] The utility model belongs to the field of electric control braking systems of automobile braking systems, and in particular relates to a sealing structure for connecting a valve body and a boosting cylinder in the electric control braking system. Background Art

[0002] With the development of vehicles and electronic control technology, more and more vehicles use electronic control braking systems. The electronic control braking system is mainly composed of four parts: motor, transmission mechanism, valve body and boost cylinder. The connection and sealing structure of the valve body and boost cylinder in the electronic control braking system is the key performance of the pressure building and sealing of the electronic control braking system. Figure 4 As shown, the O-ring 2 connects the booster cylinder 1 and the valve body 3. The O-ring seals the booster cylinder and the valve body end face, which is prone to leakage when working at high pressure.

[0003] If there is a problem with the connection structure between the valve body and the boost cylinder, the entire electric braking system will not be able to achieve stable pressure buildup, the braking function of the braking system will fail, and the safety of the vehicle and the driver will be endangered. Summary of the Invention

[0004] The utility model provides a sealing structure for connecting the valve body and the booster cylinder in an electric control brake system to solve the problem that problems may occur in the connection structure between the valve body and the booster cylinder, resulting in the inability of the entire electric brake system to achieve stable pressure building, the braking function of the brake system failing, and endangering the safety of the vehicle and the driver.

[0005] The technical solution adopted by the utility model is that it includes a boosting cylinder, a connecting seat and a valve body, wherein the boosting cylinder and the valve body are fixedly connected by bolts, and the boosting cylinder and the valve body are interference fitted respectively through the connecting seat at the fluid connection between the boosting cylinder and the valve body, and the connecting seat is sealed radially and axially with the boosting cylinder and the valve body respectively.

[0006] The connecting seat is radially interference-fitted with the boosting cylinder to achieve radial sealing with the boosting cylinder.

[0007] The connecting seat and the boosting cylinder are axially sealed with each other through a sealing surface.

[0008] The sealing surface is 120°.

[0009] The connecting seat is radially interference-fitted with the valve body to achieve radial sealing with the valve body.

[0010] The connecting seat and the valve body are axially sealed with the valve body through the sealing surface.

[0011] The sealing surface is 120°.

[0012] The connecting seat has a fluid path connected with the boost cylinder and the valve body fluid path.

[0013] The advantage of the utility model is its novel structure. The connecting seat connects the boosting cylinder and the valve body together. The connecting seat and the boosting cylinder and the valve body are doubly sealed in the radial and axial directions at the same time, ensuring a reliable connection between the boosting cylinder and the valve body. Even if a very high pressure is built up in the boosting cylinder, the sealing can be guaranteed. The structure can withstand a liquid pressure of 35MPa. The sealing structure is reliable, reducing the risk of product leakage and improving the sealing performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a partial structural diagram of the booster cylinder, connecting seat and valve body of the utility model;

[0016] Figure 3 This is a structural diagram of the connecting seat of the utility model;

[0017] Figure 4 It is a structural diagram of the existing valve body and booster cylinder connection seal. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, it includes a booster cylinder 1, a connecting seat 2 and a valve body 3, wherein the booster cylinder 1 and the valve body 3 are fixedly connected by bolts, and the booster cylinder 1 and the valve body 3 are interference fitted through the connecting seat 2 at the fluid connection between the booster cylinder 1 and the valve body 3, and the connecting seat 2 is sealed radially and axially with the booster cylinder 1 and the valve body 3 respectively.

[0019] like Figure 2 、 3 As shown, the connecting seat 2 is radially interference-fitted with the boosting cylinder 1 to achieve radial sealing with the boosting cylinder 1 .

[0020] like Figure 2 、 3 As shown, the connecting seat 2 and the boosting cylinder 1 are axially sealed with each other through the sealing surface 201 .

[0021] like Figure 2 As shown, the sealing surface is 120°.

[0022] The connecting seat 2 is radially interference-fitted with the valve body 3 to achieve radial sealing with the valve body 3 .

[0023] The connecting seat 2 and the valve body 3 are axially sealed with each other through the sealing surface 202 .

[0024] The sealing surface is 120°.

[0025] The connecting seat 2 has a fluid path 203 in fluid communication with the boost cylinder 1 and the valve body 3 .

Claims

1. A sealing structure for connecting a valve body and a booster cylinder in an electronically controlled braking system, characterized in that: It includes a boosting cylinder, a connecting seat and a valve body, wherein the boosting cylinder and the valve body are fixedly connected by bolts, and the boosting cylinder and the valve body are interference fitted respectively through the connecting seat at the fluid connection between the boosting cylinder and the valve body, and the connecting seat is sealed with the boosting cylinder and the valve body in both radial and axial directions.

2. The sealing structure for connecting the valve body and the boost cylinder in the electronically controlled braking system according to claim 1, characterized in that: The connecting seat is radially interference-fitted with the boosting cylinder to achieve radial sealing with the boosting cylinder.

3. The sealing structure for connecting the valve body and the boost cylinder in the electronically controlled braking system according to claim 1, characterized in that: The connecting seat and the boosting cylinder are axially sealed with each other through a sealing surface.

4. The sealing structure for connecting the valve body and the boost cylinder in the electronically controlled braking system according to claim 3, characterized in that: The sealing surface is 120°.

5. The sealing structure for connecting the valve body and the boost cylinder in the electronically controlled braking system according to claim 1, characterized in that: The connecting seat is radially interference-fitted with the valve body to achieve radial sealing with the valve body.

6. The sealing structure for connecting the valve body and the boost cylinder in the electronically controlled braking system according to claim 1, characterized in that: The connecting seat and the valve body are axially sealed with the valve body through the sealing surface.

7. The sealing structure for connecting the valve body and the boost cylinder in the electronically controlled braking system according to claim 6, characterized in that: The sealing surface is 120°.

8. The sealing structure for connecting the valve body and the boost cylinder in the electronically controlled braking system according to claim 1, characterized in that: The connecting seat has a fluid path connected with the boost cylinder and the valve body fluid path.

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