JPS5845765U

JPS5845765U - work vehicle

Info

Publication number: JPS5845765U
Application number: JP14216281U
Authority: JP
Inventors: 松原　義孝
Original assignee: 株式会社クボタ
Priority date: 1981-09-24
Filing date: 1981-09-24
Publication date: 1983-03-28

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図面は本考案に係る作業車の実施の態様を例示−し、第
１図は全体側面図、第２図は流体圧回路のブロック図、
第３図は変形例の部分ブロック図である。１・・・・・・流体圧式操向装置、２・・・・・・車体
、３・・曲ショベル作業装置、５・・・・・・掘削作業
装置、９゜１１〜１７・・・・・・流体圧アクチュ王−
タ、２０・・開弁切換機構、２１．２６・・・・・・流
路、２２・・・・・・駐車ブレーキ。The drawings illustrate an embodiment of the work vehicle according to the present invention, with FIG. 1 being an overall side view, and FIG. 2 being a block diagram of a fluid pressure circuit.
FIG. 3 is a partial block diagram of a modified example. 1...Fluid pressure steering device, 2...Vehicle body, 3...Curved excavator work device, 5...Excavation work device, 9゜11-17...・Fluid pressure actuator
20...Valve opening switching mechanism, 21.26...Flow path, 22...Parking brake.

Claims

[Scope of Claim for Utility Model Registration] ■ A working vehicle in which a shovel working device 3 and an excavating working device 5 are disposed at the front and rear of a vehicle body 2 equipped with a hydraulic steering device 1, wherein the hydraulic steering device 3 The actuators 11.12 and some hydraulic actuators 13.14 of the excavation work device 5 are connected to one working pump P1, and the remaining hydraulic actuators 16.17 of the excavation work device 5 are connected to the steering pump P1. A first state in which the steering pump P is connected to the steering pump P of the device 1 and the steering pump P is connected to the steering fluid pressure actuator 9, and the steering pump P is connected to the remaining fluid pressure actuator 16.17. A flow path switching valve V is provided to switch the switching valve V to the second state, and a mechanism 20 is provided to detect the excavation work state of the excavation work device 5 and automatically and reversibly switch the switching valve V to the second state. A work vehicle characterized by: (2) The valve switching mechanism 20 is configured with a flow path 21 that applies the back pressure of the outrigger actuator 15 that supports the vehicle body to the ground as a pilot operating pressure to the switching valve (2). The work vehicle set forth in item 0 of the scope of patent registration. ■ The parking brake 2 constitutes the valve switching mechanism 20.
2. The working vehicle according to claim 0, further comprising a flow path 26 for applying pilot pressure to the switching valve upon switching to the braking state in step 2.