JPH0389762U

JPH0389762U -

Info

Publication number: JPH0389762U
Application number: JP15144389U
Authority: JP
Priority date: 1989-12-28
Filing date: 1989-12-28
Publication date: 1991-09-12

Description

[Brief explanation of drawings]

第１図は本考案にかかるパワーシヨベルの土工
機操作装置の回路図、第２図は従来の土工機操作
装置の回路図である。１……操作レバー、２……第１パイロツト圧コ
ントロール弁、２_１……第１ポート、２_２……第
２ポート、３……第２パイロツト圧コントロール
弁、３_１……第１ポート、３_２……第２ポート、
４……押しボタン、５……ソレノイド切換弁、６
……チルトシリンダ、６ａ……回路、７……アン
グルシリンダ、７ａ……回路、８……パイロツト
切換弁、９……ブレードリフト弁、１０……チル
ト弁、１１，１２，１３，１４，１５……パイロ
ツト回路。 FIG. 1 is a circuit diagram of an earth-moving machine operating device for a power shovel according to the present invention, and FIG. 2 is a circuit diagram of a conventional earth-moving machine operating device. DESCRIPTION OF SYMBOLS 1... Operation lever, 2... First pilot pressure control valve, 2 ₁ ... First port, 2 ₂ ... Second port, 3... Second pilot pressure control valve, 3 ₁ ... First port, 3 ₂ ...Second port,
4...Push button, 5...Solenoid switching valve, 6
...Tilt cylinder, 6a...Circuit, 7...Angle cylinder, 7a...Circuit, 8...Pilot switching valve, 9...Blade lift valve, 10...Tilt valve, 11, 12, 13, 14, 15 ...Pilot circuit.

Claims

[Scope of utility model registration request]

First and second pilot pressure control valves that follow the movement of one operating lever, a push button provided on the operating lever, a solenoid switching valve that switches the operating direction of pilot pressure when the push button is turned on, and a tilt cylinder circuit. and a pilot switching valve provided between the angle cylinder circuit, and the first pilot pressure control valve has the first and second ports on the discharge side connected to the left and right ends of the blade lift valve, respectively, and the second pilot pressure control valve has the first and second ports on the discharge side connected to the left and right ends of the blade lift valve, respectively. The first and second ports on the discharge side are respectively connected to the left and right ends of the tilt valve by respective pilot circuits, and the pilot switching valve has a pilot circuit connected to an end thereof which is switched by the pilot pressure of the solenoid switching valve. Features a power shovel earthmoving machine operating device.