Power-off protection device used for crane

Abstract

The invention relates to a power-off protection device used for a crane. The power-off protection device comprises a base, a motor, a speed reduction mechanism and a protection mechanism. The speed reduction mechanism comprises a supporting assembly and a speed reducing assembly. The protection mechanism comprise a fixing rod, an electromagnet, a cross rod, a balancing weight, a hemp rope and a supporting rod. A connecting unit comprises an elastic pull rope and a connecting rod. By means of the power-off protection device used for the crane, the supporting mechanism is used for supporting a first clamping piece and a second clamping piece so that a brake pad can be better attached to a rotating shaft of the motor through the first clamping piece and the second clamping piece, and the rotating shaft of the motor is stopped through rubbing between the rotating shaft of the motor and the brake pad. The clamping force of the first clamping piece and the second clamping piece on the rotating shaft of the motor is mainly achieved through the dead load of the balance weight and the restoring force of a second spring, and power-off protection can be achieved on different types of cranes by adjusting the weight of the balance weight and the size of a friction block, and the use practicability is improved.

Description

technical field [0001] The invention particularly relates to a power failure protection device for a crane. Background technique [0002] The existing power-off protection devices for cranes generally use hard objects to stop the gears from rotating, which will cause certain damage to the gears, so that the gears cannot mesh with other gears, so the gears must be replaced again. Power failure may cause harm, but the gear must be replaced after use, which is more troublesome. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a power-off protection device for a crane in order to overcome the deficiencies of the prior art. [0004] The technical solution adopted by the present invention to solve the technical problem is: a power-off protection device for a crane, including a base, a motor, a deceleration mechanism and a protection mechanism, the base is arranged horizontally, and the motor and the protection mechanis...

AI Technical Summary

Problems solved by technology

[0002] The existing power-off protection devices for cranes generally use hard objects to stop the gears from rotating, which will cause certain damage to the gears, so that the gears cannot mesh with other gears, so the gears must be replaced again. The possible harm caused by a power outage, but the gear must be replaced after use, which is more troublesome

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