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Title:
CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2022/209339
Kind Code:
A1
Abstract:
A work device (8) comprises: a lower boom (9) and an upper boom (10) fitted to an upper turning body (3); a middle arm (11) and an arm (12) fitted to the tip of the upper boom (10); a work tool (13) fitted to the tip of the arm (12); a work tool cylinder (22) fitted to the arm (12) so as to rotate the work tool (13); and a link (16) rotatably fitted to the tip side of the arm (12) so as to couple the work tool cylinder (22) and the work tool (13). The work tool cylinder (22) is disposed on the lower surface (12B) side of the arm (12), and a cylinder guard (23) is fixed to a first link (17) of the link (16). The cylinder guard (23) is rotationally displaced in synchronization with an elongation/contraction motion of the work tool cylinder (22), and is interposed between the work tool (13) and the work tool cylinder (22) to thereby protect the work tool cylinder (22).

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Inventors:
OGAWA DAIKI (JP)
ASAHI SHUNSUKE (JP)
KANIWA HIROMITSU (JP)
SASAKI TAKUTO (JP)
TENDO TSUKURU (JP)
Application Number:
PCT/JP2022/005331
Publication Date:
October 06, 2022
Filing Date:
February 10, 2022
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F3/36; E02F9/00
Foreign References:
JP2013104275A2013-05-30
JP2004190330A2004-07-08
JP2004183421A2004-07-02
JPS54180372U1979-12-20
JP3000513U1994-08-09
KR20110059979A2011-06-08
JPS645780B21989-01-31
Attorney, Agent or Firm:
HIROWA PATENT FIRM (JP)
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