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Vacuum booster for vehicular brake

A supercharger and brake technology, applied in the direction of brakes, brake transmissions, vehicle components, etc., can solve the problems of plastic deformation, large area, increased weight, etc., to prevent plastic deformation, improve strength, and achieve lightweight. Effect

Active Publication Date: 2015-07-22
AUTOLIV NISSIN BRAKE SYST JAPAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the casing structure disclosed in the above-mentioned Patent Document 1, since the flat mounting portion is basically formed in a rhombus shape with four corners rounded, it is difficult to connect the mounting portion to the flange provided on the cylinder body. When a local tensile load is applied to the bolt, the area of ​​the flat portion around the bolt's coupling portion is relatively large, so plastic deformation may occur. To prevent this deformation, it is necessary to set the plate thickness of the mounting portion relatively large, resulting in weight loss. increase

Method used

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  • Vacuum booster for vehicular brake
  • Vacuum booster for vehicular brake
  • Vacuum booster for vehicular brake

Examples

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Embodiment Construction

[0048] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0049] refer to Figure 1 to Figure 6 When describing the first embodiment of the present invention, first, in figure 1 Among them, the booster case 1 of the negative pressure booster B is composed of a bowl-shaped front half case 1 a and a rear half case 1 b that join opposite ends to each other. The front half shell 1a and the rear half shell 1b are made of steel plate, and the rear half shell 1b utilizes four bolts 7 ( figure 1 Only 1 shown in ) is fixed on the body F of the car. In addition, the flange 45 provided at the rear of the cylinder block Ma of the master cylinder M utilizes a pair of bolts 6 ( figure 1Only 1 is shown in the figure) is connected with the front half-shell 1a. The bolts 6 and 7 are riveted and fixed on the rear half shell 11 b and the front half shell 1 a respectively.

[0050] The supercharger piston 4 is accommodated in the supercharge...

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Abstract

In a vacuum booster for a vehicular brake, at least one of flat front attachment portion and flat rear attachment portion has a central disc portion which is concentric with a fitting cylindrical portion and plural side disc portions which are disposed around the central disc portion so as to be continuous with the central disc portion and to be spaced from each other. Bolts are inserted through at least a pair of side disc portions of the plural side disc portions.

Description

technical field [0001] The present invention relates to a negative pressure booster for a brake of an automobile used for boosting a master cylinder, and more particularly to a negative pressure booster for a brake of an automobile in which the booster housing is composed of a front half shell The body and the rear half-shell are combined with each other. The front half-shell has a flat front mounting part that is connected to the flange at the rear of the cylinder block of the master cylinder and forms a bowl-shaped opening to the rear. The half shell has a flat rear mounting portion connected to the vehicle body and is formed in a bowl shape open to the front, and the fitting cylinder portion of the rear end portion of the cylinder is fitted so as to extend rearward from the central portion of the front mounting portion. The method is provided integrally with the front half shell to slidably support the supercharger piston reciprocally moved back and forth and accommodated i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/52
CPCB60T13/567B60T13/565
Inventor 谷泽清明吉泽健太郎
Owner AUTOLIV NISSIN BRAKE SYST JAPAN CO LTD