Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2020/194877
Kind Code:
A1
Abstract:
Provided is a work machine capable of preventing damage to a hydraulic pipe caused by repeated contact with a partition wall in a frame without impairing workability in assembling and maintenance. This work machine is characterized by being provided with: a lower traveling body that has a frame; an upper turning body that is turnably supported on the frame; a hydraulic actuator that is mounted to the frame; a center joint which is disposed in the internal space of the frame and through which hydraulic oil discharged from a hydraulic pump mounted to the upper turning body is supplied to the hydraulic actuator; and a hydraulic oil pipe that is laid through the internal space of the frame so as to connect the center joint and the hydraulic actuator, wherein in the hydraulic oil pipe, a portion passing through an opening provided to the partition wall in the frame is made as a metal pipe, and a portion on the hydraulic actuator side from the opening is made as a flexible pipe more flexible than the metal pipe.
Inventors:
TODA MAI (JP)
TANABE SHINICHI (JP)
AIKAWA RYOUTA (JP)
OZAKI YUUICHI (JP)
TANABE SHINICHI (JP)
AIKAWA RYOUTA (JP)
OZAKI YUUICHI (JP)
Application Number:
PCT/JP2019/046837
Publication Date:
October 01, 2020
Filing Date:
November 29, 2019
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
B62D55/125; E02F9/00; E02F9/02
Foreign References:
| JP2012031598A | 2012-02-16 | |||
| JP2015017439A | 2015-01-29 | |||
| JP2015147468A | 2015-08-20 | |||
| JP2001090107A | 2001-04-03 | |||
| US20150016934A1 | 2015-01-15 |
Attorney, Agent or Firm:
THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (JP)
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