公开(公告)号：US20210371253A1

公开(公告)日：2021-12-02

申请号：US17288324

申请日：2020-05-30

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Wei SHI ,  Zhengru REN ,  Zhaobo SONG ,  Zhiyu JIANG ,  Lixian ZHANG ,  Ke MA

IPC: B66C13/10

Abstract: A crane extension and installation device includes an extension device, a winch, a pulley and a cable. A main arm includes a vertical slide rail, the main arm is inclined relative to vertical, and three second pulleys at different heights of the slide rail are installed in the vertical direction of the slide rail, and the second pulley can slide vertically along the slide rail and can be fixed at a certain position of the slide rail. The extension device includes a number of cantilever beams connected end to end. The front end of the extension device is a cantilever beam, and a fixed pulley is installed on the lower peripheral surface of the extension device. The end face of the cantilever beam is equipped with a vertical lower arm through a joint, and the bottom end of the lower arm has a first pulley fixed by the joint.