Sealing structure for guide rod of vacuum booster

Abstract

The utility model relates to a vacuum booster guide rod sealing structure, and belongs to vacuum booster components in the technical field of automobile braking systems. The booster guide rod and the booster rear shell are sealed in a straight-line riveting mode, a rectangular sealing ring is additionally arranged between the booster guide rod and the booster rear shell and used for sealing, and a guide rod gasket is arranged between the booster guide rod and the rectangular sealing ring in a cushioned mode. The guide rod has the advantages that the structure is novel, the thickness and the diameter of the guide rod boss are reduced and the processing manufacturability of the guide rod is optimized by adding the guide rod gasket on the premise of ensuring the strength of the guide rod; the rectangular sealing ring is additionally arranged, so that a rubber seal is additionally arranged on the basis of the original single straight-line riveting seal of the guide rod and the rear shell, and the sealing quality of the guide rod and the rear shell is improved; compared with a conventional structure, the machining manufacturability of the guide rod can be effectively improved, the sealing quality of the guide rod and the rear shell of the vacuum booster is optimized, and therefore the overall quality of a product is improved.

Description

Technical Field

[0001] The utility model belongs to the vacuum booster component in the technical field of automobile braking systems, and particularly relates to a sealing structure of a vacuum booster guide rod, which is mainly applied to the braking systems of passenger cars. Background Art

[0002] The current vacuum booster assemblies for automobile braking can be divided into through-type vacuum boosters and non-through-type vacuum boosters according to their structures. Among them, the through-type vacuum booster has two metal guide rods in the middle, so its strength is higher than that of the non-through type. At the same time, because the front and rear shells are thinner, its weight is also lighter, and the through-type vacuum booster is widely used. As Figure 2 shown, the guide rod of the conventional vacuum booster and the rear shell adopt a straight thread riveting sealing structure. Since it belongs to a metal rigid riveting seal, it is easy to have phenomena such as riveting deviation and riveting air leakage, resulting in the scrapping of the guide rod and the rear shell. At the same time, due to the strength requirements of the guide rod, the thickness and diameter of the contact boss between it and the rear shell are relatively large, and the processing manufacturability is poor. How to improve the processing manufacturability of the guide rod and its sealing performance with the rear shell is an important topic in the design optimization of the vacuum booster. Summary of the Invention

[0003] The utility model provides a sealing structure of a vacuum booster guide rod to solve the problems of poor processing manufacturability of the guide rod and its sealing performance with the rear shell.

[0004] The technical solution adopted by the utility model is: it includes a booster guide rod, a booster rear shell and a rectangular sealing ring. Among them, the booster guide rod and the booster rear shell adopt straight thread riveting for sealing, and a rectangular sealing ring is added between the booster guide rod and the booster rear shell for sealing.

[0005] A guide rod gasket is padded between the booster guide rod and the rectangular sealing ring.

[0006] The guide rod gasket completely covers the rectangular sealing ring.

[0007] The diameter of the contact boss between the booster guide rod and the booster rear shell is smaller than the diameter of the guide rod gasket.

[0008] The material of the guide rod gasket is metal.

[0009] The advantages of the present utility model are novel structure. By adding a guide rod gasket, on the premise of ensuring the strength of the guide rod, the thickness and diameter of the guide rod boss are reduced, and the processing performance of the guide rod is optimized; by adding a rectangular sealing ring, on the basis of the original single straight-groove riveting seal between the guide rod and the rear housing, an additional rubber seal is added, improving the sealing quality with the rear housing; compared with the conventional structure, it can effectively improve the processing performance of the guide rod, optimize the sealing quality of the vacuum booster guide rod and the rear housing, thereby improving the overall quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the present utility model;

[0011] Figure 2 is a schematic diagram of the sealing structure of the current vacuum booster guide rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] As Figure 1 shown, it includes a booster guide rod 1, a booster rear housing 2 and a rectangular sealing ring 3. Among them, the booster guide rod 1 and the booster rear housing 2 are sealed by straight-groove riveting, and a rectangular sealing ring 3 is added between the booster guide rod 1 and the booster rear housing 2 for sealing;

[0013] A guide rod gasket 4 is padded between the booster guide rod 1 and the rectangular sealing ring 3;

[0014] The guide rod gasket 4 completely covers the rectangular sealing ring 3;

[0015] The diameter of the contact boss 101 of the booster guide rod 1 with the booster rear housing 2 is smaller than the diameter of the guide rod gasket 4.

[0016] The material of the guide rod gasket 4 is metal.

[0017] Working Principle

[0018] On the basis of the conventional structure of the booster guide rod 1 and the rear housing 2, a rectangular sealing ring 2 is added, so that the seal between the guide rod and the rear housing, on the basis of the original single straight-groove riveting seal A, adds an additional rubber seal B, improving the sealing quality of the vacuum booster guide rod and the rear housing; at the same time, a guide rod gasket 2 is also added, reducing the thickness and diameter of the boss of the guide rod 1, and optimizing the processing performance of the guide rod.

Claims

1. A vacuum booster guide rod sealing structure, characterized in that: It includes a booster guide rod, a booster rear housing and a rectangular sealing ring. Among them, the booster guide rod and the booster rear housing are sealed by straight-groove riveting, and a rectangular sealing ring is added between the booster guide rod and the booster rear housing for sealing.

2. The vacuum booster guide rod sealing structure according to claim 1, characterized in that: A guide rod gasket is padded between the booster guide rod and the rectangular sealing ring.

3. The vacuum booster guide rod sealing structure according to claim 2, characterized in that: The guide rod gasket completely covers the rectangular sealing ring.

4. A vacuum booster guide rod sealing structure according to claim 2, characterized in that: The diameter of the contact boss between the booster guide rod and the booster rear housing is smaller than the diameter of the guide rod gasket.

5. The vacuum booster guide rod sealing structure according to claim 2, characterized in that: The material of the guide rod gasket is metal.

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