JPS59186567U

JPS59186567U - counter balance valve

Info

Publication number: JPS59186567U
Application number: JP8274683U
Authority: JP
Inventors: 古田　利広
Original assignee: カヤバ工業株式会社
Priority date: 1983-05-31
Filing date: 1983-05-31
Publication date: 1984-12-11

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

図面第１図は従来の断面図、第２図はこの考案の実施例
を示す断面図である。　　。１５・・・・・・本体、１７・・・・・・第１ポート、
１８・・・第２ポート、Ｔ・・・・・・チェック弁、Ｓ
・・・・・・制御スプール、２１・・・・・・ダンパ室
、２２・・・・・・スプリング、２３・・・・・・シー
ト部、２４・・・・・・シール、２５・・・・・・連通
孔、２６・・・・・・ダンパオリフィス、２７・・・・
・・中空部、３４・・・・・・流量制御部、３５・・・
・・・通油孔、３７・・・・・−・パイロット通路、Ｐ
・・・・・・パイロットピストン。FIG. 1 is a sectional view of a conventional device, and FIG. 2 is a sectional view showing an embodiment of this invention. . 15...Main body, 17...First port,
18...Second port, T...Check valve, S
... Control spool, 21 ... Damper chamber, 22 ... Spring, 23 ... Seat section, 24 ... Seal, 25 ... ...Communication hole, 26...Damper orifice, 27...
...Hollow part, 34...Flow rate control part, 35...
...Oil hole, 37...Pilot passage, P
...Pilot piston.

Claims

[Scope of utility model registration request]

A check valve and a control spool having a hollow part are arranged in series in a main body having a first port and a second port, and a damper chamber is formed outside the check valve;
Due to the action of the spring provided in this damper chamber, the check valve normally comes into pressure contact with the seat part and blocks the flow path from the first port, which is under high pressure when the load is maintained, to the hollow part, and also A seal is provided on the sliding part, and a communication hole and a damper orifice communicating from the damper chamber to the hollow part are formed in this check valve.A pilot piston is integrally formed in the control spool, and the pilot piston is formed integrally with the control spool. In addition to facing the pilot passage, a flow rate control section is provided on the outer periphery of this control spool, and when the control spool moves due to the action of pilot pressure, the flow rate control section for the 2' port is adjusted according to the amount of movement of the control spool. Furthermore, this control spool is configured to have an oil passage hole, and when the control spool moves toward the check valve and hits it, its end face closes the communication hole. counterbalance valve.