This paper mainly carries on the design of hydraulic wrench structure, including the design of the hydraulic cylinder, a ratchet mechanism design and strength check.
本文主要对大扭矩液压扳手结构进行设计，包括液压缸的设计，棘轮机构的设计及强度校核等。
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The ratchet type bent pipe wrench with repositioning rotation function is applied for fast tyre assembling and disassembling operation.