Shaft end nut tightening device

A shaft end nut tightening device comprises a locking rear shaft rotating mechanism and a nut tightening mechanism. The stop rear shaft rotating mechanism is fixed on an engine case, and the nut tightening mechanism is arranged on the stop rear shaft rotating mechanism; the nut tightening mechanism comprises a wrench sleeve and a positioning bracket; the positioning support is connected to the locking rear shaft rotating mechanism, the wrench sleeve is arranged on the locking rear shaft rotating mechanism in a sleeving mode, and a torque multiplier is arranged on the positioning support and connected with the wrench sleeve. According to the invention, locking and force limiting design functions are integrated to the same end, so that the assembly efficiency is improved; tooling locking and force limiting are designed into one set of tooling, so that the number of the tooling is reduced, and the cost is reduced. 一种轴端螺母拧紧装置，包括止动后轴转动机构和螺母拧紧机构；止动后轴转动机构固定在发动机机匣上，螺母拧紧机构设置在止动后轴转动机构上；螺母拧紧机构包括扳手套和定位支架；定位支架连接在止动后轴转动机构上