ELECTROMOTION WRENCH

摘要

An electromotive wrench is provided to easily tighten a coupler of various sizes by replacing a fixing piece. An electromotive wrench comprises a housing(10) in which a drive source(20) is installed; a gear assembly(G) rotated by the drive source, installed in the housing; and a working gear(50) meshed with the gear assembly, rotated together. The working gear comprises an opening part of which either side is opened in order to house a rotating body and a fixing jack(57), formed on the inner surface of the opening part, pushing the outer surface of the fitted object and fixing it.