Hook height limit detection device and dynamic compactor

Abstract

The invention relates to a hook height limit detection device and a dynamic compactor. The hook height limit detection device comprises a rope pressing mechanism and a position detection mechanism. The rope pressing mechanism comprises a pressing part and a part to be detected, wherein the pressing part is used for pressing a lifting steel wire rope wound on a lifting winch; and the part to be detected is connected with the pressing part and is changed with the variation of the position of the pressing part in the radial direction of the lifting winch. The position detection mechanism comprises a detection switch for detecting whether the part to be detected approaches or is contacted. According to the invention, the height variation of the lifting steel wire rope is indirectly shown by measuring the thickness variation on the lifting winch, and thus, when engineering equipment operates, the engineering equipment is interfered a little, the sending of an error signal is reduced and eliminated, and the influence of an error command on the operation of the engineering equipment is avoided to the greatest extent; and moreover, the hook height limit detection device can be arranged on a rotary table on which the lifting winch is arranged and is stable when operating and the problem that the steel wire rope of the existing counter weight height limit switch, on which a counter weight is hung, is possibly broken is also avoided.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a hook height limit detection device and a dynamic compaction machine. Background technique [0002] At present, most domestic crawler cranes with small and medium tonnages of 50 to 80 tons are used to transform 300 to 500 tons·m crawler dynamic compactors. This kind of modified dynamic compactor does not have a special height limit switch, and generally uses the heavy hammer commonly used on crawler cranes. Type height limit switch, this kind of weight-type height limit switch is usually hung on the boom head of the dynamic tamping machine through a stud, and a weight is hung on a thin steel rope under the switch; there is a through hole on the weight, which can be lifted The wire rope passes through the hole of the weight. Under normal circumstances, the lifting wire rope can freely move up and down in the hole of the weight without driving the weight; but when the jib or ...

AI Technical Summary

Problems solved by technology

[0004] When the dynamic tamping machine is working, the falling hammer will bring a large vibration to the boom, and the heavy hammer height limit switch will also vibrate with the boom, so that the connecting switch and the heavy hammer type thin steel rope are prone to breakage and cannot work normally. In addition, the vibration of the arm frame is likely to cause the heavy hammer to vibrate up and down, causing the height limit switch to send an error signal, causing the control system to issue an error command, so that it cannot meet the requirements of the dynamic compaction operation

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