Provided is an operating machine boom configured so that the thickness of a steel plate forming a boom member can be decreased and buckling of the boom member can be reduced. The operating machine boom is an operating machine boom 40 including a tubular boom member 41 configured such that an upper member 42 and a lower member 43 with U-shaped sections are welded together with each upper flat portion 42a butting with a corresponding one of lower flat portions 43a. A welded portion 41b between the upper member 42 and the lower member 43 is on a compression portion B side with respect to a stress neutral point P at a boundary between a compression portion B at which compression stress is caused and a tension portion A at which tensile stress is caused when a load acts downwardly on a tip end side of the boom member 41, and a reinforcement member 44 is arranged on an inner surface side of the welded portion 41b.
WORK MACHINE BOOM
AUSLEGER EINER ARBEITSMASCHINE
FLÈCHE DE MACHINE DE TRAVAIL
2020-12-09
Patent
Electronic Resource
English
IPC: | B66C Krane , CRANES / B21C MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING , Herstellen von Blechen, Metalldraht, -stangen, -rohren Metallprofilen oder Halbzeugen auf andere Weise als durch Walzen / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
BOOM ASSEMBLING APPARATUS, WORK MACHINE, AND BOOM ASSEMBLING METHOD
European Patent Office | 2024
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