JPS639358U

JPS639358U -

Info

Publication number: JPS639358U
Application number: JP10309586U
Authority: JP
Priority date: 1986-07-07
Filing date: 1986-07-07
Publication date: 1988-01-21

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例としての建設機械
の旋回用油圧回路図、第２図は、現状の建設機械
の旋回用油圧回路図である。１６，２７……逆止弁、１７，２８……切換弁
、１８，２９……蓄圧器、１９，３０……パイロ
ツト管路、２０，３１……電磁切換弁、２１，３
２……パイロツト管路、２２，３３……パイロツ
ト管路、２３，３４……パイロツト切換弁、２４
，３５……管路、２５，３６……減圧弁、２６，
３７……逆止弁、３８……電気スイツチ、３９，
４０……リミツトスイツチ、４１……電気配線。 FIG. 1 is a swing hydraulic circuit diagram of a construction machine as an embodiment of the present invention, and FIG. 2 is a swing hydraulic circuit diagram of a current construction machine. 16, 27... Check valve, 17, 28... Switching valve, 18, 29... Pressure accumulator, 19, 30... Pilot pipe line, 20, 31... Solenoid switching valve, 21, 3
2... Pilot pipe line, 22, 33... Pilot pipe line, 23, 34... Pilot switching valve, 24
, 35... Pipe line, 25, 36... Pressure reducing valve, 26,
37...Check valve, 38...Electric switch, 39,
40...Limit switch, 41...Electrical wiring.

Claims

[Scope of Claim for Utility Model Registration] In a hydraulic circuit for swinging construction machinery, a pressure accumulator is provided from the swing left/right rotation port through a check valve and a switching valve, and the switching valve between the check valve and the pressure accumulator is a pressure reducing valve, A limit switch is connected to the opposite rotation port via a check valve, and a limit switch linked to the main switching valve operating lever is electrically connected to the electromagnetic switching valve via a manual switching switch. A hydraulic circuit characterized in that a pilot connection is made to the switching valve between the hydraulic motor and the main switching valve on the opposite side of the switching valve between the pressure accumulator and the check valve via the electromagnetic switching valve.