Electromagnetic braking device of three-phase asynchronous motor for hosting machinery

The utility model relates to an electromagnetic brake device of three-phase asynchronous electromotor for crane, which comprises a brake housing, an electromagnetic coil, a brake plate and a friction plate. The utility model is provided with a brake spring pressure adjusting assembly that comprises a thread on the brake housing, a screw hole and a compression spring in the screw hole; the utility model is provided with a brake plate abrasion control assembly that comprises two fixed-length hollow tubes on the brake plate, two linked screws respectively penetrated through the fixed-length hollow tubes, and nuts for connecting the brake plate at one side of the brake housing The utility model is also provided with a brake gap adjusting assembly that comprises a brake fixing bolt for fixing the brake plate on the rear end cap of the motor and a hollow adjusting screw rod sleeved on the brake fixing bolt. The utility model can realize instant stop of walking brake of crane and control the brake slide length withi