JPS5820704U

JPS5820704U - Shock prevention device

Info

Publication number: JPS5820704U
Application number: JP11494481U
Authority: JP
Inventors: 三宅　恵
Original assignee: 株式会社ナブコ
Priority date: 1981-07-31
Filing date: 1981-07-31
Publication date: 1983-02-08

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 the drawing]

第１図は、この考案の一実施例の回路図、第２図は、第
１図の揺れ戻り防止弁の一実施例の模式的説明図、第３
図は、圧力制御弁の圧力と流量の特性曲線図。第４−ａ
は、ブレーキ時の高圧側主回路の時間と圧力の特性曲線
図。第４図すは、低圧側主回路の時間と圧力の特性曲線
図。第５図は、従来技術の回路図である。１・・・・・・アクチュエータ、２，３・：・・・・主
回路、１３、’１３’・・・・・・揺れ戻り防止弁、１
４・・・・・・カウンタバランス弁、１５．１５’・・
・・・・圧力制御弁、１７．１７’・・・・・・第１環
状溝、１８．１８’・・・・・・第２環状溝、１９．１
９’・・・・・・内孔、２０．２０′・・・・・・スプ
ール、２１．２１’・・・・・・ばね室、２２゜２２′
・・・・・・圧力室、２３．　２３’・・・・・・ばね
、２５゜２５′・・・・・・逆止弁、２７．２７’・・
・・・・切換部、３０．３０’・・・・・・アキュムレ
ータ、３１．３１′　・・・・・・絞り。FIG. 1 is a circuit diagram of an embodiment of the invention, FIG. 2 is a schematic explanatory diagram of an embodiment of the swing back prevention valve of FIG. 1, and FIG.
The figure shows the characteristic curve of pressure and flow rate of the pressure control valve. Part 4-a
is a characteristic curve diagram of time and pressure of the high-pressure side main circuit during braking. Figure 4 is a characteristic curve diagram of time and pressure of the low-pressure side main circuit. FIG. 5 is a circuit diagram of the prior art. 1... Actuator, 2, 3... Main circuit, 13, '13'... Swing back prevention valve, 1
4... Counter balance valve, 15.15'...
...Pressure control valve, 17.17'...First annular groove, 18.18'...Second annular groove, 19.1
9'...Inner hole, 20.20'...Spool, 21.21'...Spring chamber, 22゜22'
・・・・・・Pressure chamber, 23. 23'...Spring, 25°25'...Check valve, 27.27'...
...Switching section, 30.30'...Accumulator, 31.31'...Aperture.

Claims

[Scope of utility model registration request]

A pressure fluid circuit in which two main circuits for supplying and discharging pressure fluid are connected to an actuator, and a pressure control valve and a swing back prevention valve are provided in parallel between the two main circuits,
This swing back prevention valve is arranged between an inner hole having a first annular groove connected to one side of the main circuit and a second annular groove connected to the other, and the first annular groove and the second annular groove. a spool that includes a switching part that opens and closes and is slidably fitted into the inner hole;
a spring chamber at one end of the inner hole that is provided with a spring that presses the spool and is connected to one of the main circuits; and a spring chamber that is connected to an accumulator that is connected to one of the main circuits via a throttle and that prevents the spring from returning to the spring chamber. A shock prevention device comprising a pressure chamber at the other end of the inner hole connected via a valve.