Excess loading protector and equipment of using that lifts by crane thereof

The utility model discloses an excess loading protector and equipment of using that lifts by crane thereof, including drive housing and transmission shaft, the rotatable suit of drive housing is on the transmission shaft, drive housing and transmission shaft are all through bearing assembly, connect through the dynamic friction dish and the static friction dish that compress tightly in turn between drive housing and the transmission shaft, the dynamic friction dish is connected with the transmission shaft, the static friction dish is connected with the drive housing, the both sides face of dynamic friction dish and static friction dish is equipped with and compresses tightly the dish, compressing tightly a set inboard and being equipped with elastomeric element and applying the packing force to dynamic friction dish and static friction dish, at least one outside that compresses tightly the dish is equipped with adjusting nut, the adjusting nut spiro union is on the transmission shaft, the drive housing links firmly with input gear, the transmission shaft links firmly with output gear. The utility model discloses a pure mechanical structure, the mobilizable equipment that lift by crane such as specially adapted winch, crane, the reliability is high, with low costs, maintenance convenience, the pressure that transships is adjustable.