Crane hook falling velocity adjustment apparatus

Abstract

The invention discloses a hook-falling speed adjusting apparatus of a crane hook, which comprises a drive mechanism and a transmission organ. The transmission organ receives the source power output by the drive mechanism, and outputs the source power to an arm head pulley so as to realize the rotation of the arm head pulley. Preferably, a speed sensor and an arm head controller which are arranged on an arm head are also included; the speed sensor is used for detecting rotational speed of the arm head pulley; the arm head controller is used for receiving rotational speed signals acquired by the speed sensor, transforming the rotational speed signals into wire rope speed signals which are then compared with a preset value, and outputting a control signal to control the source power output of the drive mechanism. By the two main components that are the drive mechanism and the transmission organ, the outside power is output to the arm head pulley which drives a wire rope to raise the speed synchronously, so as to further drive the crane hook to fall fleetly. The optimal proposal realizes the hook-falling speed control through the arm head controller and the speed sensor.

Description

technical field [0001] The invention relates to a hoisting machine, in particular to a device for adjusting the hook-dropping speed of a crane hook. Background technique [0002] The crane is in the condition of no-load hook drop, and the hook drop speed is one of the key performance indicators. Usually, the speed of hook drop is related to the self-weight of the hook and spreader and the wire rope magnification between hoisting and hook. The magnification of the wire rope between the winch and the hook is inversely proportional. [0003] In the no-load hook drop condition of the crane, the problem of low operating efficiency caused by the slow drop speed of the hook often occurs; especially, when the hook drop speed is lower than the rope release speed of the winch, it is easy to cause rope disorder , The appearance of the rope disorder will make the operation unable to proceed smoothly, and will also affect the service life of the wire rope. [0004] At present, the wor...

AI Technical Summary

Problems solved by technology

Since the hoisting speed is only one aspect of the speed control of the hook, this scheme is only applicable to the case where the hook and spreader have a large enough dead weight and a small magnification; In severe cases, speeding up the rope release speed of the winch will not only fail to increase the hook drop speed, but will also cause rope disorder.

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