公开(公告)号：EP4187019A1

公开(公告)日：2023-05-31

申请号：EP22779568.9

申请日：2022-02-10

申请人： Hitachi Construction Machinery Co., Ltd.

发明人： OGAWA, Daiki ,  ASAHI, Shunsuke ,  KANIWA, Hiromitsu ,  SASAKI, Takuto ,  TENDO, Tsukuru

IPC分类号： E02F3/36 ,  E02F9/00

摘要： A working mechanism (8) includes a lower boom (9), an upper boom (10), a middle arm (11), an arm (12), a working tool (13), a working tool cylinder (22), and a link (16). The working tool cylinder (22) is disposed on a lower surface (12B) side of the arm (12), and a cylinder guard (23) is fixed on a first link (17) of the link (16). The cylinder guard (23) is rotationally displaced in synchronization with an expanding or contracting operation of the working tool cylinder (22) and is interposed between the working tool (13) and the working tool cylinder (22) to protect the working tool cylinder (22).