To provide a hydraulic equipment capable of supplying hydraulic oil to a hoisting motor via a traveling motor, in which when the hoisting motor and the traveling motor are operated simultaneously, it is prevented that both pressures in the inlet and outlet sides of the hydraulic oil of the traveling motor become high level.SOLUTION: It is provided a switching valve 35 connected to two oil passages 11a, 11b allowing hydraulic oil to flow between a directional switching valve 5 for a traveling motor 2 and the traveling motor 2, which may shift to a first state where the oil passages 11a, 11b are communicated with each other or a second state where the communication is shut off. The switching valve 35 is configured so as to switch from the second state to the first state when the pressure of the hydraulic oil supplied from a directional switching valve 6 for a hoisting motor 3 to the hoisting motor 3 becomes higher than a predetermined value.SELECTED DRAWING: Figure 2
【課題】巻上げモータに走行モータを経由して作動油を供給可能な油圧装置において、巻上げモータと走行モータとを同時に作動させたときに、走行モータの作動油の入口側と出口側との両方の圧力が高圧になるのを防止することができる油圧装置を提供する。【解決手段】走行モータ2用の方向切換弁5と走行モータ2の間で作動油を流す2つの油通路11a,11bに接続されており、該油通路11a,11bを互いに連通させる第1状態と、該連通を遮断する第2状態とに動作可能な切換弁35を備える。切換弁35は、巻上げモータ3用の方向切換弁6から巻上げモータ3に供給される作動油の圧力が所定値以上の高圧になったときに、第2状態から第1状態に切り換わるように動作する。【選択図】図2
HYDRAULIC EQUIPMENT FOR CONSTRUCTION MACHINE
建設機械の油圧装置
2020-04-02
Patent
Electronic Resource
Japanese
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