JPH01133063U

JPH01133063U -

Info

Publication number: JPH01133063U
Application number: JP2648588U
Authority: JP
Priority date: 1988-02-29
Filing date: 1988-02-29
Publication date: 1989-09-11

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図は従来例を示した断面図である。１：ハウジング、２：段付プランジヤ、２ａ，
１５ａ：大径部、２ｂ，１５ｂ：小径部、３：プ
ロポーシヨニングスプリング、４：弁座、５：ポ
ペツト弁体、６：内部流路、７：バルブスプリン
グ、８：入口ポート、９：出口ポート、１３：ポ
ート、１４：他系統液圧室、１５：段付フリーピ
ストン、１６：スプリング、１８：加圧液圧室、
１９：通路、２０：ステーシヨナリピストン、２
１：弾性シール部材（Ｏリング）、２２：ボア。 FIG. 1 is a sectional view showing an embodiment of the present invention; FIG. 2 is a sectional view showing a conventional example. 1: Housing, 2: Stepped plunger, 2a,
15a: Large diameter part, 2b, 15b: Small diameter part, 3: Proportioning spring, 4: Valve seat, 5: Poppet valve body, 6: Internal flow path, 7: Valve spring, 8: Inlet port, 9: Outlet Port, 13: Port, 14: Other system hydraulic chamber, 15: Stepped free piston, 16: Spring, 18: Pressurized hydraulic chamber,
19: Passage, 20: Stationary piston, 2
1: Elastic seal member (O ring), 22: Bore.

Claims

[Scope of Claim for Utility Model Registration] (1) A stepped plunger that connects a small diameter part and a large diameter part and is slidable in the axial direction, and a valve structure that opens and closes a flow path in cooperation with the stepped plunger. a proportioning spring that biases the stepped plunger toward the large diameter portion and sets a starting point for reducing rear hydraulic pressure; and an inlet port that supplies master hydraulic pressure to the outer periphery of the small diameter portion of the stepped plunger. , an outlet port for supplying the output hydraulic pressure of the stepped plunger to the rear wheel cylinder as rear hydraulic pressure, wherein the stepped plunger is connected by a spring to the rear hydraulic pressure output side of the stepped plunger. A stepped free piston biased toward the side is provided, and the stepped free piston is
The large diameter portion of the plunger is inserted into the large diameter portion, and the small diameter portion is inserted into another system hydraulic pressure chamber into which master hydraulic pressure of another system is introduced, and the output hydraulic pressure of the stepped plunger is further introduced into the outer periphery of the stepped portion. A hydraulic pressure control valve, further comprising a pressurized hydraulic chamber communicating with the outlet port. (2) The hydraulic pressure control valve according to claim 1, characterized in that the output hydraulic pressure of the stepped plunger is separated from the outlet port by the elastic seal member when the free piston moves.