JPH0247407U

JPH0247407U -

Info

Publication number: JPH0247407U
Application number: JP12696788U
Authority: JP
Priority date: 1988-09-28
Filing date: 1988-09-28
Publication date: 1990-03-30
Anticipated expiration: 2003-09-28
Also published as: JPH0643524Y2

Description

[Brief explanation of drawings]

第１図は本考案の第１実施例、第２図は同第２
実施例、第３図は同第３実施例をそれぞれ示す油
圧回路構成図、第４図は本考案の第４実施例にか
かる反力シリンダの具体的構成を示す図、第５図
は従来装置および本装置による反力特性図である
。１……ポンプ、２……アクチユエータとしての
旋回油圧モータ、３……油圧切換弁、イ……同切
換弁の中立位置、ロ……同作動位置としての左旋
回位置、ハ……同右旋回位置、４……アクチユエ
ータ回路としての旋回モータ回路、４ａ……同回
路の左旋回側圧油供給管路、４ｂ……同右旋回側
圧油供給管路、５……タンク、６……反力シリン
ダ、７，８，１９……同シリンダの入口側管路、
１１……出口側管路、１２……反力シリンダ回路
、１３……圧力規制手段を構成する反力シリンダ
入口側絞り、１４……同出口側絞り、１７……同
リリーフ弁、１８，１９……圧力導入管路、２０
，２０……減圧弁。 Figure 1 shows the first embodiment of the present invention, and Figure 2 shows the second embodiment of the invention.
Embodiment, FIG. 3 is a hydraulic circuit configuration diagram showing the third embodiment, FIG. 4 is a diagram showing the specific structure of the reaction cylinder according to the fourth embodiment of the present invention, and FIG. 5 is a diagram of the conventional device. and a reaction force characteristic diagram of the present device. 1...Pump, 2...Swivel hydraulic motor as actuator, 3...Hydraulic switching valve, A...neutral position of the switching valve, B...left rotation position as the operating position, C...right rotation of the same rotation position, 4... Swing motor circuit as an actuator circuit, 4a... Pressure oil supply pipe on the left swing side of the same circuit, 4b... Pressure oil supply pipe on the right swing side of the same circuit, 5... Tank, 6... Opposite Force cylinder, 7, 8, 19... Inlet side pipe line of the same cylinder,
DESCRIPTION OF SYMBOLS 11...Outlet side pipe line, 12...Reaction force cylinder circuit, 13...Reaction force cylinder inlet side throttle constituting the pressure regulating means, 14...Outlet side throttle, 17...Relief valve, 18, 19 ...Pressure introduction pipe, 20
, 20...pressure reducing valve.

Claims

[Scope of Claim for Utility Model Registration] 1. A hydraulic switching valve that is operated by switching between a neutral position and an operating position by operating a lever is provided between a pump and a tank and an actuator circuit, and a spool of this hydraulic switching valve is provided with: A reaction cylinder is connected to the spool so that it can stroke, and an inlet is provided on the inlet side of the reaction cylinder for introducing pressure generated in the actuator circuit at the operating position of the hydraulic switching valve into the reaction cylinder. side pipe,
The outlet side pipes leading to the tank are respectively connected to the outlet side to form a reaction cylinder circuit, and the reaction cylinder circuit is provided with a pressure regulating means for regulating the pressure of the reaction cylinder. Hydraulic switching valve device. 2. The hydraulic switching valve device according to claim 1, wherein the pressure regulating means is constituted by a restriction provided on both the inlet side and outlet side pipelines. 3. The hydraulic switching valve device according to claim 1, wherein the pressure regulating means is constituted by a throttle provided on the inlet side pipe and a relief valve provided on the outlet side pipe. 4 A hydraulic switching valve that is operated by switching between a neutral position and an operating position by operating a lever is provided between the pump and tank and the actuator circuit, and a reaction force cylinder is connected to the spool of this hydraulic switching valve and interlocks with this spool. A pressure introduction pipe is connected to the inlet side of the reaction force cylinder to introduce the pressure generated in the actuator circuit at the operating position of the hydraulic switching valve into the reaction force cylinder. A hydraulic switching valve device characterized in that a pressure reducing valve is provided in a pressure introduction pipe.