Crane and wheel steering switching device thereof

Abstract

The invention discloses a wheel steering switching device for a crane. The device comprises a controller and an angle detection element, wherein the angle detection element is used for acquiring the upper part rotation angle of the crane in a driving operation state, and outputting a rotation angle signal to the controller; the controller receives the rotation angle signal and controls a steering switching part according to the rotation angle signal so as to control the front axle steering direction of the crane; when the upper part rotation angle is less than or equal to 90 degrees, the front axle steering direction is remained unchanged; and when the upper part rotation angle is greater than 90 degrees, the front axle steering direction is switched to a reverse direction. By using the device, reverse direction travel of the crane can be ensured; the rotating direction of a steering wheel is kept consistent with the travel direction; and moreover, the form is simple, and the performance is safe and reliable. The invention also discloses the crane provided with the wheel steering switching device.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a wheel steering switching device of a crane. The invention also relates to a crane provided with said switching device. Background technique [0002] The lifting operation and driving operation state of a general truck crane are relatively independent, that is, the state of the lifting operation is outrigger operation, while the driving operation process is relatively fixed with the turntable and chassis and cannot be loaded, the steering wheel rotation direction and the driving direction There are no inconsistencies. [0003] Please refer to figure 1 , figure 1 It is a structural schematic diagram of the whole vehicle of the existing off-road tire crane. [0004] As a special type of crane, the off-road tire crane has no special road surface requirements. It can not only be hoisted, but also can be hoisted and driven. It shares a working control room 1 for get...

AI Technical Summary

Problems solved by technology

[0010] The shortcomings of this method of detecting the rotary position through the brush slip ring: the off-road tire crane can work on tires, drive with a load, and the rotary and steering functions are frequently used. If the above-mentioned brush channel part is used for power and signal transmission, It is easy to cause damage to the brush slip ring due to long-term rotation, and the performance of the whole vehicle is unreliable

[0012] The disadvantage of this way of controlling the steering switching through the position sensor and the relay circuit: if the device is further used to control the realization of other functions through the angle detection signal, the relay switching circuit must be added, resulting in more complicated circuit connections and failures. If the points increase, the reliability of the system will be further reduced, and the safety and reliability of the whole machine will not be guaranteed.

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