发明名称 |
HYDRAULIC PIPING STRUCTURE OF CONSTRUCTION MACHINE |
摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic piping structure preventing hydraulic piping from being exposed and impairing its appearance. SOLUTION: The hydraulic piping leading from a control valve 40 and connected to a hydraulic actuator for a front attachment is installed on the back of a boom 31BC and comprises boom piping and body side piping connected to the control valve 40. The body side piping has a relay point P provided between the control valve 40 and a pin 31BP and comprises first body side piping between the boom piping and the relay point P and second body side piping between the relay point P and the control valve 4. The relay point P is placed in a position such that the first body side piping is always projecting downwards while the required length of the first body side piping varied by the raising or lowering motion of a boom 31B and the minimal required bending R of a rubber hose of the first body side piping are met.
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申请公布号 |
JP2003119823(A) |
申请公布日期 |
2003.04.23 |
申请号 |
JP20010311364 |
申请日期 |
2001.10.09 |
申请人 |
HITACHI CONSTR MACH CO LTD |
发明人 |
ISHIMARU HIDEJI |
分类号 |
E02F3/36;E02F9/00;(IPC1-7):E02F9/00 |
主分类号 |
E02F3/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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