Multi-shaft tightening device

The invention discloses a multi-shaft tightening device. The device comprises a casing, wherein a nut wrench lifting device is arranged in the casing, a positioning restraining device for restrainingand limitation is arranged at the lower end of the nut wrench lifting device, a nut wrench structure for rotationally clamping and fixing a nut is arranged at the lower end of the nut wrench lifting device, and a tightening gun for tightening a bolt is arranged at the upper end of the nut wrench lifting device. The end surface of a workpiece is positioned through the positioning restraining device, the nut is fixed through the nut wrench structure driven by an air cylinder, the bolt is screwed in through the tightening gun, and lifting is realized through the nut wrench lifting device. The bolt and nut tightening efficiency is notably improved, besides, the torsion requirement can be guaranteed, and the assembling quality can be further guaranteed. 本发明公开了种多轴拧紧装置，包括外壳，所述外壳中设置有螺母扳手提升装置，所述螺母扳手提升装置下端设置有约束限位用的定位约束装置，所述