Stall protection traveling crane

Abstract

The invention discloses a stall protection traveling crane which comprises a traveling mechanism, a lifting mechanism, a sliding mechanism and a stall protection mechanism, wherein the traveling mechanism is arranged on a rail and can move along the rail; the lifting mechanism is connected with the traveling mechanism and comprises a lifting frame body, a rotary driver and a roller, the rotary driver and the roller are arranged on the lifting frame body, and a rope body is wound on the roller; the sliding mechanism is connected with the lifting mechanism and moves along with the movement of the rope body; and the stall protection mechanism is connected with the sliding mechanism and the rope body is wound on the stall protection mechanism to prevent the moving speed of the rope body from exceeding a preset value. After the rope body comes out of the roller, the rope body winds around the stall protection mechanism and then freely descends to hoist objects. And when the rope body risesor falls at an overspeed in the running process, the speed of the rope body is limited, so that the rope body is limited to run within a preset value. Therefore, a good safety protection effect is achieved, out-of-control caused by motor faults and frequency converter faults is avoided, and equipment and personal safety is protected.

Description

technical field [0001] The invention relates to a lifting device, in particular to a stall protection crane. Background technique [0002] The crane is also called the crane, which is a common name for cranes. The crane is generally installed on the top of the factory building and workshop, supported on the track of the wall, and driven by a motor to walk and lift back and forth to realize the lifting and handling of objects. [0003] But existing driving, all must rely on electric motor to drive its operation. For safety, it is limited to run within a certain speed, and if it runs beyond the speed, it will cause accidental injury. Because the speed of the motor will be changed by factors such as frequency and voltage, when the frequency converter fails or is damaged, the speed will be out of control and a speeding accident will occur. When it falls rapidly, it will cause the transported objects to be damaged, and the setting will hit the workers, resulting in safety accid...

AI Technical Summary

Problems solved by technology

[0003] However, the existing driving vehicles must rely on electric motors to drive their operation.

For safety, it is limited to run within a certain speed, if it runs beyond the speed, it will cause accidental injury

Because the speed of the motor will be changed by factors such as frequency and voltage, when the inverter fails or is damaged, the speed will be out of control and a speeding accident will occur.

When it falls quickly, it will cause the transported objects to be damaged, and the setting will hit the workers, resulting in safety accidents. The sharp rise or fall will cause damage to the driving itself, the objects being carried, workshop equipment, and personnel.

[0004] In the existing technology, some use sensors to detect the speed. When the speed is too high, the controller controls the motor to run at a reduced speed. The stability of this technology is not high enough. In the harsh environment of high temperature and high pressure, sensors, lines, Components such as controllers are easily damaged and malfunctioned, and some use locking devices, but such devices are only effective in the power-off state

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