Floating type spanner and hydrogenation gun

The invention relates to the technical field of new energy equipment, in particular to a floating type spanner and a hydrogenation gun, the floating type spanner comprises a gun body and a gun head, the gun body is connected with the gun head, the gun head can move relative to the gun body in the axis direction of the gun body, the gun body is provided with a gas filling port, the gun head is provided with a gas outlet, the gun body is provided with a spanner assembly, the spanner assembly is connected with a reversing guide pipe in the gun body, and the spanner assembly drives the reversing guide pipe to move relative to the gun body through a lever structure and then performs gas filling/gas exhausting. The spanner assembly is arranged on the gun body in a floating mode. According to the purpose, a traditional fixed wrench is changed into a floating wrench, a wrench assembly integrally floats on a gun body, the stroke of a reversing guide pipe is increased through overall movement of the wrench assembly, an