Electronic hyperextension-proof device of single cylinder bolt type telescopic boom crane oil cylinder

Abstract

The invention discloses an electronic hyperextension-proof device of a single cylinder bolt type telescopic boom crane oil cylinder, belonging to the technical field of an engineering machinery telescopic boom. The electronic hyperextension-proof device comprises a controller, an oil cylinder boom position detection switch, an oil cylinder boom position detection block, a display and an electronic proportional valve, wherein the oil cylinder boom position detection switch is fixed on the tail part of the oil cylinder; the boom position detection switch is electrically connected with the inputend of the controller; the oil cylinder boom position detection block is fixed on the tail part of the tail section of boom of a crane telescopic boom; the communication interface of the controller is connected with a display; and an output port is electrically connected with the electronic proportional valve. The electronic hyperextension-proof device has the beneficial effect that a boom head structure can be prevented from being cracked up by an electronic control means when the oil cylinder continuously moves forwards, hydraulic energy waste and mechanical structure abrasion can be avoided, and the oil cylinder position can be reminded for an operator by audible and visual alarm.

Description

technical field [0001] The invention relates to an anti-overextension device for a crane cylinder, in particular to an electronic overextension prevention device for an oil cylinder of a single-cylinder bolt-type telescopic arm crane, which belongs to the technical field of construction machinery telescopic arms. Background technique [0002] In order to ensure the safety and reliability of each boom section during the telescopic process, with the development of all-terrain cranes and the boom length technology, the single-cylinder bolt telescopic mechanism is more and more widely used on the telescopic boom. Type interlocking system, after the spring-driven cylinder pin on the telescopic oil cylinder pins the telescopic arm, the connection between the section arm and other section arms is mechanically released; or in other words, only when a certain section of the telescopic arm and the telescopic oil cylinder are locked together can the joint be released. The connection be...

AI Technical Summary

Problems solved by technology

This will cause a waste of hydraulic energy and wear of the mechanical structure. At the same time, because there is no controller and display involved, the operator cannot get an alarm prompt

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