JPS6168962U

JPS6168962U -

Info

Publication number: JPS6168962U
Application number: JP15397384U
Authority: JP
Priority date: 1984-10-12
Filing date: 1984-10-12
Publication date: 1986-05-12

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示した断面図、第
２図は第１図の液圧制御特性を示したグラフ図、
第３図は従来例を示した断面図である。１：ハウジング、４：入口室、５：出口室、６
：ポペツトバルブ、６ａ：ポペツト弁体、６ｂ：
弁座、１０：段付ピストン、１１：大径部、１２
，１４：カツプシール、１３：中径部、１５：小
径部、１６：スプリング、１７，１９：バツクア
ツプリング、１８：ストツパリング、２０：保持
部材。 FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a graph showing the hydraulic pressure control characteristics of FIG. 1,
FIG. 3 is a sectional view showing a conventional example. 1: Housing, 4: Inlet chamber, 5: Outlet chamber, 6
: Poppet valve, 6a: Poppet valve body, 6b:
Valve seat, 10: Stepped piston, 11: Large diameter section, 12
, 14: Cup seal, 13: Medium diameter portion, 15: Small diameter portion, 16: Spring, 17, 19: Backup spring, 18: Stopper ring, 20: Holding member.

Claims

[Claims for Utility Model Registration] (1) A stepped piston that moves by receiving hydraulic pressure in an inlet chamber connected to a master cylinder and hydraulic pressure in an outlet chamber connected to a rear wheel cylinder from opposite directions; A brake fluid pressure control valve having a poppet valve that is built into a stepped piston and opens and closes a passage communicating between an inlet chamber and an outlet chamber by movement of the poppet valve, and a spring that presses the stepped piston in a direction in which the poppet valve opens. , the stepped piston has a large diameter part that houses the poppet valve, a medium diameter part that is a sliding part with a sealing means disposed on the housing side that separates the inlet chamber and the outlet chamber, and a part that is connected to the inlet chamber and the atmosphere. 1. A brake fluid pressure control device comprising: a small diameter portion that serves as a sliding portion for another sealing means that separates the side from the other side; (2) The sealing means separating the inlet chamber and the outlet chamber is a back-up spring whose outer diameter part is fitted and locked to the housing and whose inner diameter part is slidably inserted into the inner diameter part of the stepped piston. The brake fluid pressure control valve according to claim 1, characterized in that the member is held on the housing side. (3) A holding member is interposed between the sealing means that separates the inlet chamber and the outlet chamber and the other sealing means that separates the inlet chamber from the atmosphere side to restrict movement of the two sealing means. The brake fluid pressure control valve according to claim 1 of the utility model registration claim, characterized in that: