Hoist, tower arm control method and tower arm control device

Abstract

The invention provides a hoist, a tower arm control method and a tower arm control device, and relates to the technical field of engineering machinery. When a main arm extends or retracts, an actual included angle between the tower arm and a mast structure is obtained through a controller; the retraction and extension speed of the hoist is regulated according to the comparison result between the actual included angle and a preset safe included angle range so that the actual included angle is stabilized in the preset safe included angle range. In the tower arm control device, an acquisition module is used for acquiring the actual included angle between the tower arm and a mast structure; and a control module is used for regulating the retraction and extension speed of the hoist according tothe comparison result between the actual included angle and the preset safe included angle range. The hoist, the tower arm control method and the tower arm control device can facilitate coordinated control over the hoist and the main arm; in the retraction and extension process of the main arm, the mast structure can be prevented from inclining forwards due to excessive extension of the hoist, and the risk that the tower arm is lifted off the ground due to excessive retraction of the hoist and consequently a complete vehicle is overturned can be avoided effectively; and the operation is convenient, and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a crane, a tower arm control method and a tower arm control device. Background technique [0002] For a crane with a longer tower arm, due to the longer tower arm and greater mass, it is necessary to ensure that the front end of the tower arm touches the ground for a period of time during the initial boom process, so as to prevent the crane from tilting forward. During this process, in order to ensure that the front end of the tower arm always touches the ground, the operator needs to coordinate and control the hoisting action of the main arm and the tower arm to prevent the tower arm from being pulled up and cause the risk of forward tilting. The operation is complicated and the reliability is poor. Contents of the invention [0003] The purpose of the present invention includes providing a crane, a control method for a tower arm and a control device for a tower ...

AI Technical Summary

Problems solved by technology

During this process, in order to ensure that the front end of the tower arm always touches the ground, the operator needs to coordinate and control the hoisting action of the main arm and the tower arm to prevent the tower arm from being pulled up and cause the risk of forward tilt. The operation is complicated and the reliability is poor.

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