Title:
CONSTRUCTION MACHINE
Document Type and Number:
Japanese Patent JP2022133008
Kind Code:
A
Abstract:
To provide a construction machine improved in workability when drawing/inserting a connection pin out of/to an arm and an arm cylinder.SOLUTION: A work device 7 of a hydraulic shovel 1 has a boom 8 rotating in relation to an upper revolving body 3 by a boom cylinder 14, an arm 11 rotating in relation to the boom 8 by an arm cylinder 16, and a work tool mounted at a tip of the arm 11. One end of the arm cylinder 16 is rotatably connected to the boom 8, and the other end is rotatably connected to a pin hole 11C of the arm 11 by using a pin. Between the boom 8 and the arm cylinder 16, a jack 18 is provided which positions a pin hole 16C of a rod 16B side of the arm cylinder 16 to the pin hole 11C of the arm 11, by derricking the arm cylinder 16 in relation to the boom 8.SELECTED DRAWING: Figure 2
Inventors:
KANIWA HIROMITSU
ASAHI SHUNSUKE
SASAKI TAKUTO
TENDO SAKU
OGAWA DAIKI
ASAHI SHUNSUKE
SASAKI TAKUTO
TENDO SAKU
OGAWA DAIKI
Application Number:
JP2021031796A
Publication Date:
September 13, 2022
Filing Date:
March 01, 2021
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
E02F9/00; E02F3/36; E02F3/38; E04G23/08
Attorney, Agent or Firm:
Patent Attorney Corporation Hirowa Patent Office