A lifting device safety device

Abstract

The invention relates to a safety device of lifting equipment. The device comprises a lifting base and a stop foundation base. The stop foundation base is arranged in the lifting direction of the lifting equipment and provided with a rack in the lifting direction. The lifting base is connected with a lifting driving device of the lifting equipment through an elastic assembly. The elastic assembly is provided with an electric switch in the elasticity extending direction. In the normal lifting state, the elastic assembly makes no contact with the electric switch. A middle shaft is fixedly connected with the axis of a gear. The electric switch is electrically connected with an electromagnetic clutch which is arranged on the middle shaft. In the normal lifting state, the electromagnetic clutch is in a turn-off state. When the lifting driving device breaks down, the lifting base freely falls, the elastic assembly extends to touch the electric switch, the electric switch controls the electromagnetic clutch to wrap the middle shaft, and the gear is locked to the rack. By means of the safety device, when the lifting equipment breaks down, dual safety protection of mechanical stop and electric control stop is achieved for the lifting equipment, and the safety protection mechanism of the lifting equipment is improved.

Description

technical field [0001] The invention relates to a safety protection device for lifting equipment, in particular to a safety device for lifting equipment capable of realizing electromechanical double protection. Background technique [0002] Many mechanical equipment are equipped with lifting functions and corresponding mechanisms. For heavy lifting parts or important occasions, safety protection measures must be taken for the operation of lifting parts. In the prior art, most of the safety measures for lifting and lowering of mechanical equipment adopt methods such as setting safety warnings, isolating protective cover plates, buffer devices or purely mechanical stops. These methods are difficult to meet the safety requirements of lifting devices under other special working conditions such as heavy loads. For a purely mechanical stop protection device, when the stop mechanism is loose or slips, the protection will fail, which may cause major damage to the equipment or a safe...

AI Technical Summary

Problems solved by technology

In the existing technology, most of the safety measures for lifting and lowering of mechanical equipment adopt methods such as setting safety warnings, isolating protective cover plates, buffering devices or purely mechanical stops. These methods are difficult to meet the safety requirements of lifting devices under other special working conditions such as heavy loads.

For a purely mechanical stop protection device, when the stop mechanism is loose or slips, the protection will fail, which may lead to major damage to the equipment or safety accidents

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