PROBLEM TO BE SOLVED: To enable warming-up in an oil passage from an operation valve that operates a hydraulic device to the hydraulic device to be performed easily.SOLUTION: A hydraulic system for a working machine includes: a hydraulic pump that discharges a hydraulic fluid; a first hydraulic device that is operated by a hydraulic fluid; a second hydraulic device that is operated by a hydraulic fluid independently of the first hydraulic device; a first operation valve that controls the hydraulic fluid to be supplied to the first hydraulic device; a second operation valve that controls the hydraulic fluid to be supplied to the second hydraulic device; a first oil passage that connects the first operation valve and the first hydraulic device; a second oil passage that connects the second operation valve and the first hydraulic device; a third oil passage that connects the first oil passage and the second oil passage; and a discharge oil passage that discharges the hydraulic fluid of one of the first oil passage and the second oil passage.SELECTED DRAWING: Figure 1
【課題】油圧機器を操作する操作弁から油圧機器に至る油路における暖機を簡単に行う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第1油圧機器と、第1油圧機器とは別に作動油によって作動する第2油圧機器と、第1油圧機器に供給する作動油を制御する第1作動弁と、第2油圧機器に供給する作動油を制御する第2作動弁と、第1作動弁と第1油圧機器とを接続する第1油路と、第2作動弁と第1油圧機器とを接続する第2油路と、第1油路と第2油路とを接続する第3油路と、第1油路及び第2油路のいずれかの作動油を排出する排出油路と、を備えている。【選択図】図1
HYDRAULIC SYSTEM FOR WORKING MACHINE
作業機の油圧システム
2018-07-12
Patent
Elektronische Ressource
Japanisch