Running positioning device for double-beam trolley of crane

Abstract

The invention relates to a running positioning device for a double-beam trolley of a crane. The device is characterized by comprising a holder and a support shaft installed on the holder, wherein two ends of the support shaft are respectively fixedly provided with a gear and rotatable counter, a rack engaged with the gear is fixed mounted on a crane girder, the holder includes an upper holder and a lower holder, the upper holder is fixed on an end beam of the trolley, the left end at a lower part of the upper holder is hinged with the left end at an upper part of the lower holder, the right end at the lower part of the upper holder is connected to the right end at the upper part of the lower holder through a bolt, the bolt is sleeved by a spring which is arranged between the upper and the lower holders, and the support shaft is mounted on the lower holder. The invention transmits the signal to a control system through the rotatable counter catching the engagement tooth number of the gear and the rack, and the control system performs frequency conversion to an electrical machine based on the signal and the actual measurement residual distance signal, the speed gradually reduces from high to a predetermined position, the electrical machine powers off, the trolley stably stops; and the connection mode of the upper and the lower holder ensures the gear and the rack to fully engage through the up and down fluctuation of the lower holder under the condition of unsmooth contact surface of the girder and the rack.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a running positioning device for a double-girder trolley of a crane. Background technique [0002] At present, the operation of the crane trolley is mainly driven by the driving device to drive the wheel device to run on the main girder. The running speed is determined by the output speed of the driving device and the diameter of the wheel. The positioning accuracy is poor, and repeated adjustments are required to make the trolley reach the predetermined position. In addition, the trolley is loaded, has large inertia, and unstable operation, so it is not suitable for working conditions that require high positioning accuracy. Contents of the invention [0003] In order to solve the technical problems in the known technology, the present invention provides a crane double-girder trolley operating positioning device with stable operation and high positioning accuracy. [0004] The ...

AI Technical Summary

Problems solved by technology

[0002] At present, the operation of the crane trolley is mainly driven by the driving device to drive the wheel device to run on the main girder. The running speed is determined by the output speed of the driving device and the diameter of the wheel. The positioning accuracy is poor, and repeated adjustments are required to make the trolley reach the predetermined position. In addition, the trolley is loaded, the inertia is large, and the operation is unstable. It is not suitable for working conditions that require high positioning accuracy.

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