Trolley positioner for workpiece transfer

The utility model belongs to the technical field of workpiece transfer trolleys, and particularly relates to a trolley positioner for workpiece transfer, which comprises a transfer trolley, the transfer trolley comprises four wheels, a mounting frame is fixedly connected above the four wheels, a trolley cavity is fixedly mounted above the mounting frame, a handle is fixed on the right side of the trolley cavity, and a positioning device is arranged on the handle. A positioning cavity is fixedly mounted on the right side of the mounting frame, a positioning mechanism is arranged in the positioning cavity and comprises an electric telescopic rod, the electric telescopic rod is fixedly connected with the upper portion of the inner wall of the positioning cavity, a connecting block is fixedly mounted at the lower end of the electric telescopic rod, and an elastic spring is fixed to the lower portion of the connecting block; the lower end of the elastic spring is fixedly connected with a mounting block, a friction