Railway vehicle-mounted cable take-up and pay-off device

The utility model discloses a railway vehicle-mounted cable take-up and pay-off device which comprises a cable box, a cable winch, a machine frame, a chain transmission mechanism, a stepless speed change motor, a speed regulator, an electric slip ring and an electric control system. The cable winch is arranged on a left machine frame and a right machine frame which are fixed in the cable box, andthe chain transmission mechanisms are arranged on the left side and the right side of the cable winch respectively. The stepless speed change motor and the speed regulator are arranged on the right side of the right rack; the bottom of the stepless speed change motor is fixed on the cable box; the electric slip ring is arranged in the middle of the right side wall in the cable box, and the right end of the electric slip ring is fixed to the inner wall of the cable box. Corresponding vehicle-mounted cable boxes, cable winches and electrical control systems are designed according to different vehicle types, the requirem