PROBLEM TO BE SOLVED: To simply discharge operating oil.SOLUTION: The hydraulic system of a work machine comprises: a hydraulic pump discharging operating oil; hydraulic equipment operated with the operating oil; an operation member capable operating the hydraulic equipment; an operation valve capable of setting pressure of the operating oil supplied to the hydraulic equipment according to the operation of the operation member; a first oil passage connecting the hydraulic pump to the operation valve; a first actuation valve installed in a middle part of the first oil passage and changeable in opening; a first discharge oil passage being the first oil passage and installed in a section between the operation valve and the first actuation valve; and a second actuation valve installed in the first discharge oil passage and changeable in opening.SELECTED DRAWING: Figure 1
【課題】簡単に作業油を排出することができるようにする。【解決手段】作業機の油圧システムは、作動油を吐出する油圧ポンプと、作動油によって作動する油圧機器と、油圧機器を操作可能な操作部材と、操作部材の操作に応じて油圧機器に供給する作動油の圧力を設定可能な操作弁と、油圧ポンプと操作弁とを接続する第1油路と、第1油路の中途部に設けられ且つ開度が変更可能な第1作動弁と、第1油路であって操作弁と第1作動弁との区間に設けられた第1排出油路と、第1排出油路に設けられ且つ開度が変更可能な第2作動弁と、を備えている。【選択図】図1
HYDRAULIC SYSTEM OF WORKING MACHINE
作業機の油圧システム
04.10.2018
Patent
Elektronische Ressource
Japanisch
IPC: | E02F Baggern , DREDGING / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein |