JPS6084407U

JPS6084407U - Suspension lock device for wheeled swing work vehicles

Info

Publication number: JPS6084407U
Application number: JP17748183U
Authority: JP
Inventors: 邦治藤井
Original assignee: 株式会社小松製作所
Priority date: 1983-11-18
Filing date: 1983-11-18
Publication date: 1985-06-11

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 the drawing]

図面は本考案の一実施例を示すもので、第１図は全体的
な構成図、第２図は回路図である。１は下部車体、２は上部旋回体、４は掘削装置、８は車
輪、９はサスペンションシリンダ、１０はパイロット逆
止弁、１４は油圧モータ、１６はシャトル弁、１７．１
８は往復回路、１９はパイロット回路、２１は駐車ブレ
ーキ装置、２７は油圧シリンダ、２８はサスペンション
切換弁、２８ａは連通位置、２８ｂはドレン位置、３２
は旋回軸。The drawings show one embodiment of the present invention, with FIG. 1 being an overall configuration diagram and FIG. 2 being a circuit diagram. 1 is a lower vehicle body, 2 is an upper rotating body, 4 is an excavation device, 8 is a wheel, 9 is a suspension cylinder, 10 is a pilot check valve, 14 is a hydraulic motor, 16 is a shuttle valve, 17.1
8 is a reciprocating circuit, 19 is a pilot circuit, 21 is a parking brake device, 27 is a hydraulic cylinder, 28 is a suspension switching valve, 28a is a communication position, 28b is a drain position, 32
is the pivot axis.

Claims

[Scope of utility model registration request]

An upper revolving body 2 is rotatably provided on a lower vehicle body 1 having wheels 8 driven by a hydraulic motor 14, and a working machine such as an excavator 4 is mounted on this upper revolving body 2. , a negative parking brake device 21 which is activated by spring force and released by hydraulic pressure acting on a hydraulic cylinder 27, and suspension cylinders 9, 9 between the left and right wheels and the lower vehicle body 1. In a wheeled turning work vehicle in which a pilot circuit 19 is connected to the hydraulic cylinder 27 of the parking brake device 21 through the shuttle valve 16 to the reciprocating circuit 17, 18 of the hydraulic motor 14, the left and right suspensions are set at 9°. pilot check valves 10, 10 that allow flow from the 9 fluid pressure chambers only to the respective fluid pressure chambers;
The pilot pressure acting portions of the pilot check valves 10, 10 are connected to the communication position 28a and the drain position 28b.
The suspension switching valve 28 is connected to the pilot circuit 19 via the suspension switching valve 28 having a
The suspension switching valve 28 switches between the upper rotating body 2 and the rotating shaft 32 of the upper rotating body 2 to the drain position 28b when the upper rotating body 2 faces to the side, and to the communication position 2 when the upper rotating body 2 faces in the longitudinal direction.
A suspension lock device for a wheeled turning work vehicle, characterized in that it is tied to the shore with a linkage that switches to 8a.