Disassembling and assembling device for space-limited connecting piece

The invention belongs to the field of disassembly and assembly devices for connecting pieces, and particularly relates to a disassembly and assembly device for a space-limited connecting piece. The device comprises a first handle, a second handle and a connecting rod, the first handle and the second handle are hinged through the connecting rod, the device further comprises a first supporting plate and a transmission device, a first mounting shaft is arranged on the first handle, and a third mounting shaft is arranged on the second handle; the transmission device comprises a first driving wheel, a third driving wheel and a middle wheel, the third driving wheel is rotationally connected with the third mounting shaft, the middle wheel is rotationally connected with the middle mounting shaft, the first mounting shaft comprises a first mounting shaft input end and a first mounting shaft output end, the first mounting shaft output end is rotationally connected with the first driving wheel, and the second mounting s