Bolt loosening and tightening floating mechanism and bolt loosening and tightening all-in-one machine

The utility model belongs to the technical field of bolt fastening equipment, and particularly relates to a bolt loosening and tightening floating mechanism and a bolt loosening and tightening all-in-one machine, which comprise a mounting base, and a bolt screwing mechanism and a bolt supporting mechanism which are arranged on the mounting base, the bolt screwing mechanism comprises a Z-axis floating plate connected to the mounting base in an up-down sliding mode, an XY-direction floating assembly fixedly mounted on the Z-axis floating plate and an electric wrench arranged on the XY-direction floating assembly. The bolt righting mechanism comprises a supporting seat movably arranged at the lower end of the mounting base, a righting driving assembly fixed to the supporting seat, a rotating shaft in transmission connection with the righting driving assembly and a righting swing arm assembly arranged on the rotating shaft. According to the utility model, the electric wrench floats in the X, Y and Z directions, s