JPS59163205U

JPS59163205U - Compressor drive hydraulic circuit device for crane vehicle coolers

Info

Publication number: JPS59163205U
Application number: JP5675583U
Authority: JP
Inventors: 城下　昭光; 松山　良一
Original assignee: 株式会社小松製作所
Priority date: 1983-04-18
Filing date: 1983-04-18
Publication date: 1984-11-01

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 drawings]

第１図は油圧制御弁の構成説明図、第２図は本考案−実
施例の構成説明図、第３図乃至第６図は同作用説明図で
ある。１１はシャトル弁、１２は電磁弁、１３はシーケンス弁
、１４はリリーフ弁、２１は油圧モータ、３３．３５は
アンロードリリーフ弁。FIG. 1 is an explanatory diagram of the configuration of a hydraulic control valve, FIG. 2 is an explanatory diagram of the configuration of an embodiment of the present invention, and FIGS. 3 to 6 are explanatory diagrams of the same operation. 11 is a shuttle valve, 12 is a solenoid valve, 13 is a sequence valve, 14 is a relief valve, 21 is a hydraulic motor, and 33.35 is an unload relief valve.

Claims

[Scope of utility model registration request]

A hydraulic motor 21 that drives the cooler compressor 26; a shuttle valve 11 that is provided in the circuit of the hydraulic motor 21 and supplies and discharges oil to the hydraulic motor 21 and shuts off this supply and discharge;
A sequence valve 13 is provided in the circuit of the hydraulic motor 21 and operates until the differential pressure generated by the fixed throttle and the spring pressure are balanced, dividing the supply pressure to the hydraulic motor 21 side and the tank 32 side. A solenoid valve 1 is provided in one of the drain pipes 24 branched from the supply pressure side of the circuit and closes the drain pipe 24 by large activation of the cooler switch 38.
2, and is provided in the other drain pipe 27 branched from the supply pressure side of the circuit of the hydraulic motor 21, and is activated by the ON operation of the solenoid valve 12 to set the hydraulic pressure on the supply pressure side of the circuit to a constant pressure, and the shuttle valve 11 is activated. a relief valve 14 to be switched; and a pipe communicating the supply pressure side of the circuit of the hydraulic motor 21 to the tank 32;
An unload relief valve 33 is provided in the line 31 and closes the line 31 when the pTO switch 39 is turned on; communication with the switch 39 of
An unload relief valve 35 which closes this pipe line 34 when the TO switch 43 is turned on and opens the pipe line 34 by back pressure when the relief valve 12 is activated, and an accumulator 7 provided on the supply pressure side of the circuit of the hydraulic motor 21. A compressor drive hydraulic circuit device for a crane vehicle cooler, characterized by comprising: