Vehicle hydraulic master cylinder

A hydraulic and vehicle technology, which is applied to vehicle components, hydraulic brake transmissions, cylinders, etc., can solve the problems of increasing the piston's invalid stroke and biting the lip part of the inner circumference, etc.

Active Publication Date: 2004-08-04
AUTOLIV NISSIN BRAKE SYST JAPAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the cup seal holding structure described above, however, since the outer side of the inner peripheral lip portion is held pressed toward the outer wall of the piston, the elastic contact force of the inner peripheral lip portion acting on the outer wall of the piston increases, and When the piston moves, there is a danger that the inner peripheral lip part bites into the working fluid supply hole. In addition, because the cup seal is pressed and held only against the outer wall of the piston, the cup seal moves following the movement of the piston, increasing the pressure. Ineffective stroke of the piston

Method used

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Examples

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Embodiment Construction

[0025] Embodiments of the present invention will be described below with reference to the drawings. figure 1 is a cross-sectional view of a piston-type hydraulic master cylinder of a vehicle, wherein the cylinder body 2 of the master cylinder 1 is formed into a cylindrical shape with both ends open, including a distal small diameter portion 2a formed at its front end, a diameter slightly larger than the distal small diameter A small-diameter cylinder bore 2b of the portion 2a, and a medium-diameter cylinder bore 2c and a large-diameter cylinder bore 2d formed at the rear of the cylinder main body. The first cup-shaped seal 3 is installed in the joint groove of the distal small-diameter part 2a, and the second cup-shaped seal 5 supported on the seal support 4 and the first piston guide 6 are installed in the small-diameter cylinder. in bore 2b. A seal support 7 is installed between the small-diameter cylinder bore 2b and the medium-diameter cylinder bore 2c, and a third cup se...

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PUM

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Abstract

A hydraulic master cylinder for vehicle has: a cylinder main body; a sleeve; a plurality of seal rings; a plug, a lid member comprising the sleeve and the plug; and a piston inserted into the cylinder bore so as to form a hydraulic pressure chamber between the piston and the lid member; wherein the sleeve is inserted into the cylinder main body with an open end thereof being made to face an interior of the cylinder main body so as to dispose the seal rings between a circumferential wall of the cylinder bore and the sleeve and in such a manner that the seal rings hold the outlet port therebetween, and the plug is fixedly threaded in the opening at the one end so as to prevent the dislocation of the sleeve.

Description

technical field [0001] The invention relates to a vehicle hydraulic master cylinder, which is suitable for hydraulic brakes and clutches of automobiles and two-wheeled and three-wheeled motor vehicles, and particularly relates to a hydraulic master cylinder, wherein one end opening of the cylinder main body with both ends open can be covered. closed to form the cylinder bore. [0002] The invention relates to a vehicle hydraulic master cylinder, which is suitable for hydraulic brakes and clutches of vehicles. Background technique [0003] In a conventional vehicle hydraulic master cylinder, the vehicle hydraulic master cylinder has a cover member mounted on an opening at one end of a cylinder body open at both ends, thereby forming a cylinder bore. For example, in a piston-type hydraulic master cylinder, a cover fits over an opening at one end of the cylinder body, and a piston guide fits inside the cylinder body, thereby forming the cylinder bore. The first piston and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T11/16B60T11/20B60T11/236B60T11/26F16J15/56
CPCF16J15/56B60T11/16B60T11/26B60T11/236B60T11/20
Inventor 春原日出光六川明浩
Owner AUTOLIV NISSIN BRAKE SYST JAPAN CO LTD
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