Landing leg locking system and mobile engineering machinery

Abstract

The invention relates to the technical field of engineering machineries, and discloses a landing leg locking system for locking a landing leg after the landing leg is landed. The system comprises a pressure detection device, a controller and an electric control switch module, wherein the electric control switch module is connected to an inlet oil line or outlet oil line of a landing leg expansion oil cylinder in series; the pressure detection device is used for detecting pressure in a rodless cavity of a landing leg support oil cylinder, and sending pressure signals to the controller; the controller receives the pressure signals, and compares the detected pressure with the preset value; and if the detected pressure is greater than the preset value, the electric control switch module is controlled in a close state. The landing leg locking system locks the landing leg after the landing leg is landed, so that the damage of the landing leg because of error operation can be prevented effectively, and the safety hazard is reduced; and the performances are reliable, and the locking effect is obvious. The invention also discloses mobile engineering machinery with the landing leg locking system.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a locking system for outriggers used for locking outriggers after the outriggers support the ground. The invention also relates to a mobile construction machine with the above-mentioned outrigger locking system. Background technique [0002] With the rapid development of my country's economic construction, all kinds of mobile construction machinery are more and more widely used in various engineering constructions. [0003] In order to facilitate the transition and meet the needs of construction operations, mobile construction machinery such as concrete pump trucks and lifting vehicles usually have an appropriate driving mechanism and a plurality of retractable outriggers arranged around the main body of the construction machinery; each outrigger usually It includes a deployment cylinder and a support cylinder. The deployment cylinder can realize the expansion and ...

AI Technical Summary

Problems solved by technology

[0005] When the outriggers of the concrete pump truck are unfolded and the four outriggers are fully supported, the weight of tens of tons of the whole vehicle will completely act on the four outriggers. Movement in the horizontal direction will generate a huge twisting force on the outriggers, which will easily cause a series of consequences such as cracking of the outriggers. Once the outriggers fail, the safety performance of the vehicle will be affected

[0006] In the prior art, eye-catching signs are usually used on the outriggers to remind the operator not to deploy or retract the outriggers after they have supported the ground. Note that the sign is often covered by splashed concrete. When the outriggers are on the ground, the operator is prone to misuse and pull the outrigger expansion handle, which in turn makes the outrigger expansion cylinder move in the horizontal direction

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