JPH022272U

JPH022272U -

Info

Publication number: JPH022272U
Application number: JP8098788U
Authority: JP
Priority date: 1988-06-17
Filing date: 1988-06-17
Publication date: 1990-01-09

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の応用例を示す図、
第２図はシール部の断面部分図、第３図は第２図
の―線に沿つたシールの断面図、第４図は第
２図の―に沿つたシールの断面図である。２８……ハウジング、３０……シリンダ、３０
ｂ……溝、３６……段付きシリンダ室、４４……
シール、４６……環状ベース部、４８……放射方
向突条、５０……軸方向突条、５０ａ……軸方向
突条の突起部、５４……リツプ部、６８……スプ
リング。 FIG. 1 is a diagram showing an example of application of an embodiment of the present invention;
2 is a partial cross-sectional view of the seal portion, FIG. 3 is a cross-sectional view of the seal taken along line - in FIG. 2, and FIG. 4 is a cross-sectional view of the seal taken along line - in FIG. 28...Housing, 30...Cylinder, 30
b...Groove, 36...Stepped cylinder chamber, 44...
Seal, 46... Annular base portion, 48... Radial protrusion, 50... Axial protrusion, 50a... Protrusion of axial protrusion, 54... Lip portion, 68... Spring.

Claims

[Scope of Claim for Utility Model Registration] A housing having a stepped cylinder chamber, a master cylinder connection port and a rear wheel cylinder connection port communicating with a large diameter portion and a small diameter portion of the stepped cylinder chamber, respectively; A large number of radial protrusions arranged in the large diameter part, formed at one end thereof and capable of coming into contact with the end wall of the large diameter part of the stepped cylinder, and a large number of axial protrusions formed on the outer periphery thereof. , an annular base portion forming a valve seat at a portion of its inner periphery closer to the small diameter portion of the stepped cylinder chamber, and between the outer periphery of the annular base portion and the peripheral wall of the large diameter portion of the stepped cylinder chamber, and one end of the annular base portion. The stepped cylinder allows brake fluid to flow from the small diameter side of the stepped cylinder chamber to the large diameter side of the stepped cylinder between the side and the end wall of the small diameter section of the stepped cylinder chamber, but prevents the reverse flow. An elastic seal consisting of an annular lip that abuts the circumferential wall of the large diameter portion of the chamber; and an annular base portion of the seal that passes through the inside of the annular base portion at a distance, one end of which receives rear wheel cylinder hydraulic pressure, and the other end of which passes through the annular base portion of the seal. a piston that is exposed to air and has a valve head that seats on and leaves the valve seat from the small diameter side of the stepped cylinder chamber; and a spring that biases the piston so that the valve head leaves the valve seat. In the brake fluid pressure control device, an annular groove is provided at a position near the end wall of the peripheral wall of the large diameter portion of the cylinder chamber, and the annular groove is provided on the end wall side of the axial protrusion of the elastic seal. A brake fluid pressure control device comprising a protrusion that fits into the brake fluid pressure control device.