The invention belongs to the technical field of hoisting, and particularly relates to an electric hoist for a single-beam crane. The electric hoist comprises a lifting mechanism speed
reducer, a winding drum component, a lifting mechanism
electric motor and an operation mechanism speed
reducer, wherein a
motor shaft is rotationally connected in an
electric motor box body, and the
motor shaft is insliding connection with a rotor through a spline; the
motor shaft is fixedly connected with a first input shaft through an elastic sleeve pin
coupling, and an opening is formed in the motor shaft; athird spring is fixedly connected to each of the two ends of the rotor, the rotor is fixedly connected in the
electric motor box body which is connected with a
machine frame through a screw, a fan
brake wheel is fixedly connected to a support ring, a
brake ring is fixedly connected to the electric motor box body, and the
brake ring is made of a flexible material; one end of a movable shaft is fixedly connected with the rotor, the other end of the movable shaft is fixedly connected with the support ring, and the movable shaft is slidably connected in the opening; a sliding chute is arranged onone side of the elastic sleeve pin
coupling, a sliding plate is slidably connected in the sliding chute, and the sliding plate is fixedly connected with the bottom of the sliding chute through a fourth spring; and the end surface of the sliding plate is in contact with the inner wall of a winding drum, so that the safety of the electric hoist is enhanced.