Torque limiting system of folding-arm type lorry-mounted crane

Abstract

The invention discloses a torque limiting system of a folding-arm type lorry-mounted crane. The torque limiting system comprises a sensor part, a processor part and a performer part, wherein the sensor part consists of a weight sensor, a length measuring sensor and two angle sensors, the processor part calculates the rated lifting capacity under the current working condition according to sensor signals and compares the rated lifting capacity with an actually-measured lifting capacity, and the performer part sends out alarm signals or limits dangerous operations when alarming or limiting conditions are reached. The torque limiting system of the folding-arm type lorry-mounted crane has the advantages that the inconvenience in the input of a rated working curve and incompleteness of curve expression are avoided; the torque limitation under any working condition of lifting from the tail end of a lifting arm can be performed, and the functions are comprehensive; and as the weight sensor is adopted to directly measure weight, the calculation error caused by factors such as zero drift and delay when a pressure sensor is adopted is avoided, and the accuracy is high.

Description

technical field [0001] The invention relates to a moment limiting system, in particular to a moment limiting system suitable for a knuckle-arm type truck-mounted crane. Background technique [0002] At present, the structure of the knuckle-arm type truck-mounted crane is more complicated than that of the straight-arm type truck-mounted crane, and the realization of the moment limiting function is also more difficult. The general knuckle-boom truck-mounted crane does not use a torque limiting system. During the work process, the arm body may be broken or the car body may tip over due to torque overload. Therefore, the operator needs to rely on experience when working with the truck-mounted crane. To ensure the safety of the operation, there are potential safety hazards caused by misjudgments caused by experience, which increases the unsafe factors of the operation and brings hidden dangers to the operation safety of the operators. Contents of the invention [0003] The obj...

AI Technical Summary

Problems solved by technology

[0002] At present, the structure of the knuckle-arm truck-mounted crane is more complicated than that of the straight-arm truck-mounted crane, and the realization of the moment limiting function is also more difficult.

The general knuckle-boom truck-mounted crane does not use a torque limiting system. During the work process, the arm body may be broken or the car body may tip over due to torque overload. Therefore, the operator needs to rely on experience when working with the truck-mounted crane. To ensure the safety of operation, there are potential safety hazards caused by misjudgment caused by experience, which increases the unsafe factors of operation and brings hidden dangers to the operation safety of operators.

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