JPH0165903U

JPH0165903U -

Info

Publication number: JPH0165903U
Application number: JP1987161074U
Authority: JP
Priority date: 1987-10-20
Filing date: 1987-10-20
Publication date: 1989-04-27

Description

[Brief explanation of the drawing]

第１図はこの考案にかかる油圧回路図、第２図
はフロントにロングアタツチメントを装着した油
圧シヨベル、第３図は回転式破砕機の一部切欠側
面図である。４……回転式破砕機、９……回転装置、１１…
…油圧モータ、１３，１４……メインポンプ、１
５……パイロツトポンプ、１６……分流弁、１７
……方向切換弁、１８……パイロツト圧受圧部、
１９……制御用電磁弁、２０，２１，２５……ソ
レノイド、２４……電磁開閉弁、２６……切換ス
イツチ。 FIG. 1 is a hydraulic circuit diagram according to this invention, FIG. 2 is a hydraulic excavator equipped with a long attachment on the front, and FIG. 3 is a partially cutaway side view of a rotary crusher. 4...Rotary crusher, 9...Rotating device, 11...
...Hydraulic motor, 13, 14...Main pump, 1
5...Pilot pump, 16...Diversion valve, 17
... Directional switching valve, 18 ... Pilot pressure receiving part,
19... Control solenoid valve, 20, 21, 25... Solenoid, 24... Solenoid on/off valve, 26... Selector switch.

Claims

[Scope of utility model registration request]

A bracket part for attaching to the tip of the front arm of a construction machine and a main body part with a rotatable biting beam are connected via a rotating device.
In a construction machine equipped with a rotary crusher in which the biting direction of the biting beam can be adjusted by rotating a hydraulic motor installed in the rotating device, the shunting valve on the discharge side of the main pump and the hydraulic motor for rotating the crusher and communicate via a control solenoid valve,
Further, when the pilot pressure receiving part for the directional control valve in the above-mentioned flow divider valve and the pilot pump are communicated via an electromagnetic on-off valve, and on the other hand, when either of the left and right solenoids of the control solenoid valve is energized, the above-mentioned A hydraulic circuit for a rotary crusher, characterized in that the electromagnetic on-off valve is configured to communicate and switch to an oil passage open position.