Vacuum booster rear shell sealing structure adopting injection molding positioning

Abstract

The utility model relates to a vacuum booster rear shell sealing structure adopting injection molding positioning, and belongs to the technical field of vacuum booster assemblies. The inner side of the sealing ring belt of the rear shell is coated with a glue layer, and a sealing ring without a metal framework is directly fixed to the glue layer in an injection molding mode. The rear shell sealing ring has the advantages that the rear shell sealing ring is novel in structure, on the basis of a conventional structure, a metal framework and original riveting positioning of the rear shell sealing ring are omitted, and the rear shell sealing ring is directly subjected to injection molding positioning and glued to the inner side of the sealing ring belt of the rear shell, so that compared with the conventional structure, the positioning precision and the sealing performance are greatly improved, and the service life of the rear shell sealing ring is prolonged. And the product quality is improved while the part structure is simplified and the product is optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum booster assemblies, and in particular relates to a vacuum booster rear housing sealing structure positioned by injection molding, which is mainly used in the braking system of passenger car models. Background Art

[0002] The vacuum booster assembly of the current automobile brake consists of a vacuum chamber and an atmospheric chamber, and the rear housing of the booster needs to be sealed from the outside through a rear housing seal ring. Figure 2 As shown, the existing vacuum booster rear housing seal ring 3 is as shown Figure 3 As shown, the material of the sealing ring body 301 is EPDM, and a metal frame 302 is injection molded in the middle, and the metal frame is riveted and positioned with the navel 102 of the rear shell 1. Due to the complex structure of the sealing ring, the poor processability of injection molding, and the riveting deviation and riveting leakage during the riveting positioning with the rear shell, which seriously affects the product quality, it is urgent to optimize the design and improve the sealing structure and positioning method of the rear shell. Summary of the invention

[0003] The utility model provides a vacuum booster rear housing sealing structure using injection molding positioning to solve the current problems of complex sealing ring structure, poor injection molding processability, and easy riveting deviation and riveting leakage during riveting positioning with the rear housing, which seriously affect product quality.

[0004] The technical solution adopted by the utility model is that the inner side of the sealing ring of the rear shell is coated with a glue layer, and the sealing ring without a metal frame is directly injection-molded and fixed on the glue layer.

[0005] The sealing ring is made of EPDM rubber.

[0006] The utility model has the advantage of novel structure. On the basis of conventional structure, the metal frame of the rear shell sealing ring is cancelled, and the original riveting positioning is cancelled. Instead, it is directly injection molded and positioned and glued to the inner side of the sealing ring band of the rear shell. Compared with the conventional structure, the positioning accuracy and sealing performance are greatly improved. While simplifying the parts structure and optimizing the product, the product quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying creative work.

[0008] Figure 1 It is a structural schematic diagram of the utility model;

[0009] Figure 2 It is a schematic diagram of the sealing structure of the rear housing of a conventional vacuum booster;

[0010] Figure 3 It is a structural schematic diagram of a sealing ring in the sealing structure of a conventional vacuum booster rear housing. DETAILED DESCRIPTION

[0011] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0012] The inner side of the sealing ring 101 of the rear housing 1 is coated with a glue layer 2 , and a sealing ring 3 without a metal frame is directly injection-molded and fixed on the glue layer 2 .

[0013] The sealing ring 3 is made of EPDM rubber.

[0014] On the basis of the conventional structure, the utility model eliminates the metal frame of the rear shell sealing ring and the original riveting positioning, and becomes a direct injection molding positioning and adhesive bonding to the inner side of the sealing ring band 101 of the rear shell 1, so that its positioning accuracy and sealing performance are greatly improved, and the product quality is improved while simplifying the parts structure.

[0015] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the protection scope of the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, any technician familiar with the technical field can make equivalent replacements or changes based on the technical scheme and the utility model concept of the present invention within the technical scope disclosed by the present invention. These simple variations all belong to the protection scope of the present invention.

Claims

1. A vacuum booster rear housing sealing structure using injection molding positioning, characterized in that: The inner side of the sealing ring of the rear housing is coated with a rubber layer, and the sealing ring without a metal frame is directly injection-molded and fixed on the rubber layer.

2. The sealing structure of the rear housing of a vacuum booster positioned by injection molding according to claim 1, characterized in that: The sealing ring is made of EPDM rubber.

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