Insert for brake system

Abstract

The utility model discloses an insert for a brake system, which is embedded in a control valve piston, a non-penetrating cavity for inserting a control valve rod is arranged in the insert, the non-penetrating cavity sequentially comprises a spherical section, a straight barrel section and an external expansion section from inside to outside, a guide bulge is arranged at the end part of the insert, a guide inclined surface is sequentially arranged on the outer surface of the insert, and a guide groove is formed in the outer surface of the insert. The lower end of the guide inclined face extends to the guide protrusion, the higher end of the guide inclined face is connected with the annular limiting groove, and the check ring is located at the other end, away from the guide protrusion, of the insert. The utility model provides an insert for a brake system, which is assembled between a control valve piston and a control valve rod, not only ensures the mounting clearance of the control valve rod, but also reduces the wear coefficient and prolongs the service life.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to an insert for a braking system. Background Technology

[0002] The vacuum booster is a key component of modern automotive hydraulic braking systems. It is directly connected to the brake pedal in the driver's compartment. When the driver depresses the brake pedal, it pushes a push rod to open the air valve, creating a pressure difference between the two chambers within the booster, thus providing assistance. The vacuum booster directly affects the driver's pedal feel and pedal travel. The ineffective pedal travel is directly related to the clearance between the control valve piston and the control valve push rod.

[0003] The vacuum booster contains a control valve piston connected to the end of a control valve stem. The end of the control valve stem is a ball head, and the control valve piston contains a spherical chamber that mates with the ball head. When the control valve stem actuates, the ball head and the spherical chamber rotate relative to each other. Because existing control valve pistons require a certain amount of deformation, they are made of rubber. However, this results in significant friction between the inner wall of the spherical chamber and the ball head, leading to wear of the spherical chamber and consequently shortening its service life. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the shortcomings of the prior art, this utility model provides an insert for a braking system, which is assembled between the control valve piston and the control valve rod. This not only ensures the installation clearance of the control valve rod, reduces the wear coefficient, and extends the service life, but also enables efficient assembly and disassembly with the piston.

[0005] The technical solution adopted by this utility model is as follows: An insert for a braking system is installed inside a control valve piston. The insert has a non-penetrating cavity for inserting a control valve rod. The non-penetrating cavity consists of a spherical section, a straight cylindrical section, and an outwardly expanding section from the inside to the outside. The end of the insert is provided with a guide protrusion. The outer surface of the insert is provided with a guide slope, an annular limiting groove, and a retaining ring in sequence. The lower end of the guide slope extends to the guide protrusion, while the higher end connects to the annular limiting groove. The retaining ring is located at the other end of the insert away from the guide protrusion.

[0006] Preferably, the end of the outwardly extended section is provided with a sealing groove, and a sealing ring is installed in the sealing groove.

[0007] Preferably, the inclination angle of the guide ramp is 30°.

[0008] Preferably, the two sides of the annular limiting groove are inclined limiting surfaces, wherein the inclined limiting surface on the side connected to the guide inclined surface has an inclination angle of 45°, and the inclined limiting surface on the other side has an inclination angle of 30°.

[0009] Preferably, a cylindrical section and a conical section are provided between the annular limiting groove and the retaining ring, wherein the inclination angle of the conical section is 15°.

[0010] Beneficial effects: The brake system insert disclosed in this utility model has an internal non-penetrating cavity that allows for effective insertion with the control valve stem, and the end is fitted with a sealing ring, which not only ensures the installation clearance of the control valve stem and reduces the wear coefficient, but also prevents foreign objects from entering the clearance and affecting the smoothness of the fit. The surface of the insert is provided with guide slopes, annular limiting grooves, etc., which not only realizes effective assembly with the control valve piston, but also enables efficient disassembly and assembly. Attached Figure Description

[0011] Figure 1 This is an assembly diagram of an embodiment of the present utility model;

[0012] Figure 2 This is an overall structural diagram of the present invention;

[0013] Figure 3 This is a cross-sectional view of an embodiment of the present utility model. Detailed Implementation

[0014] The technical solutions of the embodiments of this utility model will now be clearly and completely described with reference to the accompanying drawings.

[0015] like Figure 1 As shown, the present invention discloses an insert 1 for a braking system, which is installed in the control valve piston 2 and is simultaneously assembled with the control valve rod 3. The control valve piston is made of rubber and has a hole 21 for assembling the insert. The inner wall of the hole is provided with a protruding limiting ring 22 and other structures. The control valve rod has a ball head 31 and a tapered rod body 32.

[0016] The specific structure of the insert is as follows: Figures 2-3 As shown, the insert is an integrated structure with a non-penetrating cavity 11 for inserting the control valve stem inside. The front end of the insert is provided with a guide protrusion 12, and the outer surface of the insert is provided with a guide slope 13, an annular limiting groove 14 and a retaining ring 15 in sequence.

[0017] Specifically, the non-penetrating cavity consists of a spherical section 111, a straight section 112, and an outwardly expanding section 113, from the inside out. The ball head 31 of the control valve stem is located in the straight section and its end abuts against the spherical section, allowing for flexible rotation. The tapered rod 32 is located in the outwardly expanding section. This cavity structure facilitates the insertion of the control valve stem and ensures a certain installation gap between the control valve stem and the cavity, effectively reducing the wear coefficient. Due to the installation gap, to ensure the stability of the insertion and prevent the entry of foreign objects, the end of the outwardly expanding section is provided with a sealing groove 114, and a sealing ring 115 is provided in the sealing groove. When the control valve stem is inserted, the sealing ring can effectively wrap the control valve stem to prevent foreign objects from entering and to ensure the stability of the insertion.

[0018] The guide protrusion at the front end of the insert is a columnar structure that cooperates with the groove 23 in the control valve piston hole. The guide protrusion not only plays a preliminary guiding role during assembly, but also plays a positioning role after assembly by cooperating with the groove to ensure that the insert is in place. The inclined angle of the guide slope is 30°, with its lower end extending to the guide protrusion and its higher end connecting to the annular limiting groove. The design of the guide slope allows the insert to be smoothly inserted into the hole of the control valve piston.

[0019] The annular limiting groove cooperates with the limiting ring on the inner wall of the control valve piston to achieve axial limiting. The two sides of the annular limiting groove are inclined limiting surfaces. The inclined limiting surface on the side that is connected to the guide inclined surface has an inclination angle of 45°, and the inclined limiting surface on the other side has an inclination angle of 30°. Setting the two sides as inclined limiting surfaces can achieve axial limiting after assembly, and can also apply a certain pulling force when disassembly is required, so that the control valve piston and the insert can be separated smoothly.

[0020] The retaining ring is located at the other end of the insert away from the guide protrusion. After the insert is assembled with the control valve piston, the retaining ring will block the end to ensure proper installation. The annular limiting groove and the retaining ring are provided with a cylindrical section and a conical section, wherein the inclination angle of the conical section is 15°.

[0021] The insert-mounted control valve piston and control valve stem disclosed in this utility model can ensure the installation clearance of the control valve stem, reduce the wear coefficient, and extend the service life.

[0022] The technical content and features of this utility model have been disclosed above. However, those skilled in the art may still make various substitutions and modifications that do not depart from the spirit of this utility model based on the teachings and disclosures of this utility model. Therefore, the protection scope of this utility model should not be limited to the content disclosed in the embodiments, but should include various substitutions and modifications that do not depart from this utility model, and should be covered by the claims of this patent application.

Claims

1. An insert for a braking system, fitted inside a control valve piston, characterized in that: The insert has a non-penetrating cavity for inserting a control valve stem. The non-penetrating cavity consists of a spherical section, a straight cylindrical section, and an outwardly expanding section from the inside to the outside. The end of the insert is provided with a guide protrusion. The outer surface of the insert is provided with a guide slope, an annular limiting groove, and a retaining ring in sequence. The lower end of the guide slope extends to the guide protrusion, while the higher end connects to the annular limiting groove. The retaining ring is located at the other end of the insert away from the guide protrusion.

2. The insert for a braking system according to claim 1, characterized in that: The end of the extended section is provided with a sealing groove, and a sealing ring is installed in the sealing groove.

3. The insert for a braking system according to claim 1, characterized in that: The guide ramp has an inclination angle of 30°.

4. An insert for a braking system according to claim 1, characterized in that: The two sides of the annular limiting groove are inclined limiting surfaces, wherein the inclined limiting surface on the side connected to the guide inclined surface has an inclination angle of 45°, and the inclined limiting surface on the other side has an inclination angle of 30°.

5. An insert for a braking system according to claim 1, characterized in that: The annular limiting groove and the retaining ring are provided with a cylindrical section and a conical section, wherein the inclination angle of the conical section is 15°.

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