Crane, crane tower arm control method and device

A control method and crane technology, which is applied to cranes, hoisting devices, transportation and packaging, and can solve the problems of large measurement errors of angle sensors, easy shaking of tower arms, and poor control accuracy.
CN111285258BActive Publication Date: 2021-03-19SANY AUTOMOBILE HOISTING MACHINERY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SANY AUTOMOBILE HOISTING MACHINERY
Publication Date
2021-03-19

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Abstract

The invention provides a crane, a crane tower arm control method and a crane tower arm control device and relates to the technical field of engineering machinery. In the crane, a telescopic coil cylinder is provided with a distance sensor used for detecting the telescopic length of the telescopic oil cylinder; meanwhile a tower arm winch is provided with a turn number detection mechanism used fordetecting the number of turns of the winch so that a controller can be used for acquiring the actual length of a main arm and the actual length of a rope unwound by the winch and obtaining the targetlength of the rope unwound by the winch by calculating the actual length of the main arm; the rope winding or rope unwinding speed of the winch is regulated according to a comparison result of the target length of the rope and the actual length of the rope so that the actual included angle between the main arm and the tower arm is kept within a preset included angle range; coordinated regulation is realized by regulating length relationship between the tower arm and the main arm; the control precision is relatively high, thus good posture of a hoisting arm in a lifting process or a descendingprocess is maintained; rollover of the crane is effectively prevented; and better reliability of the crane is realized.
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Description

technical field

[0001] The invention relates to the technical field of engineering machinery, in particular to a crane and a crane tower arm control method and device. Background technique

[0002] Before hoisting and using the tower arm of the single-cylinder bolt-type telescopic boom crane, it is necessary to extend the main arm to make the tower arm reach a suitable height. After the hoisting is completed, the main arm and the tower arm need to be retracted. In order to prevent the crane from overturning, it is necessary to ensure that the angle between the tower arm and the main arm is within a reasonable range during the expansion and contraction of the main arm, so that the tower arm and the main arm maintain a good posture and stabilize the center of gravity of the crane. Most existing cranes are equipped with angle sensors on the tower arm to detect the angle between the tower arm and the main arm, and control it within a preset range. However, the tower arm is easy...

Claims

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