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This is a record of a document published elsewhere, first published by the European Patent Office, as EP-4707218-A1, on 11 March 2026. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000002031

Tower crane step-changing device and tower crane

Published
Permanent URL
Classification
Lifting, Positioning & Manipulation › Hoists and Cranes
Inventors
FU YINGXIONG, LAN JIABIAO, LIU SHENGPING, YANG YUNHUA, YAO HUAHUI
Assignee
ZOOMLION CONSTRUCTION HOISTING MACHINERY CO LTD
Original source
EP-4707218-A1, the European Patent Office, 11 March 2026
Document SHA-256
fdc3357d45b5bde4c5e205f1009180d81ee70e3df4559468b482daf6b79bb7ae

Abstract

Provided is a tower crane and a tower crane step-changing device, which includes a step-changing frame and a step-changing swing rod. The step-changing frame includes two supporting arms and a connecting crossbeam connecting them. The upper ends of the two supporting arms are both hinged to an upper vertical web member, and the lower ends of the two supporting arms are each provided with clamping openings corresponding to a step. The upper end of the step-changing swing rod is hinged to the upper vertical web member and is configured to push or pull the connecting crossbeam when a force is applied to the lower end. Operators can use the step-changing swing rod to drive the step-changing frame to swing, to make it catch or detach from the step, resulting in less effort than directly controlling the step-changing frame. In this way, even one operator can operate a heavy step-changing frame, effectively improving the step-changing efficiency.

Publication information

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Citation

OpenTechnical Publication OT-2026-000002031, “Tower crane step-changing device and tower crane,” published September 15, 2026 at 19:10:19 UTC, https://opentechnical.org/p/OT-2026-000002031.

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This record reproduces a document published elsewhere and is provided for reference and study. Rights in the original remain with its owner. See the publication policy.