Negative pressure booster

A supercharger and negative pressure technology, which is applied in the field of negative pressure superchargers, can solve problems such as sticking and slipping, hindering the smooth sliding of the valve cylinder, and generating abnormal sounds, so as to prevent deterioration, maintain good maintainability, and suppress abnormal sounds. the effect produced

Active Publication Date: 2017-06-06
AUTOLIV NISSIN BRAKE SYST JAPAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since there is no grease reservoir on the inner periphery of the sealing lip, when the valve cylinder slides back and forth, especially when it slides forward, the front end of the thin-walled sealing lip is pulled radially by friction with the valve cylinder. The inner side is pulled in, causing a stick-slip phenomenon, which not only hinders the smooth sliding of the valve cylinder, but also produces abnormal noise

Method used

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Embodiment Construction

[0031] Embodiments of the present invention will be described below based on the drawings.

[0032] First, in figure 1 and figure 2 Among them, the booster case 1 of the negative pressure booster B is composed of a front case half body 1a and a rear case half body 1b which are respectively formed in a bowl shape and whose opposite ends are connected to each other. These front part housing half body 1a and rear part housing half body 1b are made of steel plate, and it passes through a pair of link rods 6 ( figure 1 Indicates only one of them) and combine. A pair of link rods 6 are arranged so as to sandwich the central axis of the supercharger housing 1, and these link rods 6 are connected to the front end surface of the front housing half 1a with the mounting flange Ma1 of the cylinder Ma of the master cylinder M. , In addition, using these links 6, the rear panel portion outer shell 1b is coupled to the front of the vehicle body F.

[0033] The interior of the supercharg...

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PUM

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Abstract

According to one embodiment, a vacuum booster includes a booster shell and a booster piston which divides an interior of the booster shell into a front vacuum chamber and a rear operation chamber. The vacuum booster further includes a valve cylinder in which a control valve controls a communication state of the operation chamber depending on a movement of an input rod. A bearing cylinder is provided on a rear wall of the booster shell. A bearing bush is mounted in the bearing cylinder to support the valve cylinder, and a seal lip is provided at a rear end of the bearing bush integrally therewith to contact elastically closely with the valve cylinder. A grease reservoir is provided in an inner surface of the bearing bush, and an extension grease reservoir is provided in an inner surface of the seal lip.

Description

technical field [0001] The present invention relates to a negative pressure supercharger, which is used for the boosting action of the brake master cylinder of the automobile, especially relates to the improvement of the negative pressure supercharger. The negative pressure chamber on the front side and the supercharger piston of the action chamber on the rear side are connected. The valve cylinder is connected to the supercharger piston. The control valve for switching the operation chamber to the negative pressure chamber and the atmosphere is installed in the bearing sleeve provided on the rear wall of the supercharger housing, and the bearing sleeve made of elastic material is slidably supported on the outer peripheral surface of the valve sleeve, A grease storage tank for holding grease is provided on the inner peripheral surface of the bearing sleeve, and in addition, at the rear end of the bearing sleeve, there is integrally connected with the outer peripheral surface o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/52B60T13/56B60T13/569F16J15/324
CPCB60T13/57B60T13/52B60T13/56B60T13/567B60T13/569
Inventor 谷泽清明矢田部修一
Owner AUTOLIV NISSIN BRAKE SYST JAPAN CO LTD
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