Electric hydraulic control device for support legs of milling machine

Abstract

The invention provides an electric hydraulic control device for support legs of a milling machine. The device comprises an oil source, a front support leg oil cylinder, a flow adjusting loop, pressuremeasuring equipment and a signal processing and indicating module; the flow adjusting loop is connected between the oil source and the front support leg oil cylinder; the pressure measuring equipmentmeasures pressure of a rodless cavity of the front support leg oil cylinder; the signal processing and indicating module is connected with electric control parts in the pressure measuring equipment and the flow adjusting loop, and sends adjusted signals to the flow adjusting loop according to the matching degree of pressure fed back by the pressure measuring equipment and the load to adjust oil liquid entering the front support leg oil cylinder. By means of the device, it can be ensured that in the construction process, the front support leg oil cylinder cannot be suspended in air, the cutting speed of a milling drum can be better matched with the descending speed of the front support leg oil cylinder, so that the whole device is more reliable in performance and saves more energy, and theservice life of the device can be prolonged at the same time.

Description

technical field [0001] The invention belongs to the field of road milling machine application technology, and in particular relates to an electro-hydraulic control device for a leg of a milling machine. Background technique [0002] In order to adapt to the vigorous development of the road maintenance business, maintenance machinery is also undergoing rapid changes. As the key equipment in the road maintenance machinery industry, the milling machine's development is directly related to the construction quality and efficiency of road maintenance. [0003] When the milling machine is in construction, it needs to mill the road surface to a certain depth, which is a preset parameter. The side slides on both sides of the milling machine are equipped with wire sensors. The controller collects the preset depth value and the position signal fed back by the wire sensor. The speed at which the planer drum falls (also known as the speed of the lower knife). Milling machines currentl...

AI Technical Summary

Problems solved by technology

In addition, the speed of the milling machine when cutting the knife is also related to the hardness of the road surface and the wear degree of the cutter head of the milling drum. The oil cylinder connected to the front outrigger will descend faster than the speed of the milling drum cutting the road surface, resulting in The outrigger cylinder is suspended above the road, and there is a danger of overturning

At the same time, when the milling drum is cutting, the load becomes larger, which will accelerate the wear of the milling drum cutter head, and even damage the equipment

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