Transmission device of press machine

The utility model discloses a transmission device of a press machine, and belongs to the technical field of transmission devices of press machines. Two symmetrical connecting plates are fixedly connected to the top of the base, a top seat is fixedly connected to the tops of the connecting plates, a hydraulic cylinder is fixedly connected to the bottom of the top seat, a transmission rod is arranged at one end of the hydraulic cylinder, one end of the transmission rod is sleeved with a first ferrule, and one end of the hydraulic cylinder is sleeved with a second ferrule. A telescopic leather sheath is fixedly connected between the first ferrule and the second ferrule, sliding grooves are formed in the outer walls, facing each other, of the two connecting plates correspondingly, sliding rods are slidably connected to the inner walls of the sliding grooves, limiting blocks are fixedly connected to the outer walls of the first ferrule and the second ferrule correspondingly, one end of the limiting block of the fi