A self-adaptive pilot-operated electro-hydraulic proportional threaded cartridge valve for mountains and hills

Abstract

The invention discloses a mountainous hilly adaptive pilot-operated type electrohydraulic proportional thread cartridge valve, and belongs to the field of valves. Main valve sleeves are cylindrical, the lower ends of the main valve sleeves are sequentially provided with a step hole and an oil outlet, the main valve sleeves are connected with armature sleeves through threads on the upper end, mainvalve cores are slidably arranged in the main valve sleeves in the axial direction, a pilot-operated valve core is slidably arranged in the main valve cores in the axial direction, and connected witharmatures through a cylindrical bulge part on the upper end. The pilot-operated valve core, the armatures, and iron cores of electromagnets are sequentially installed in the armature sleeves from bottom to top, and a magnetic isolation pad is fixedly connected into a grooving at the lower ends of the iron cores. According to the mountainous hilly adaptive pilot-operated type electrohydraulic proportional thread cartridge valve, the pilot-operated valve core is arranged in the main valve cores to enhance compact inside the valve and reduce the valve body, especially smaller than a plate pilot valve; a main valve adopts the form of combining annular buffer head end face and rectangular groove to realize segmenting throttling and adjustable flow; and the problems of oil leakage due to a cylinder sliding valve adopted in rear suspension of a tractor, loose sealing and up-down vibration in rear suspension are solved.

Description

technical field [0001] The invention belongs to the technical field of valves, in particular to an adaptive pilot type electro-hydraulic proportional threaded cartridge valve for mountains and hills. Background technique [0002] Tractor is an important power machine to realize agricultural mechanization and modernization. In the past ten years, the rapid development of electronic control technology and the application of intelligent transportation in automotive applications have led to the application of electronic control technology in tractors, and modern new tractor products are increasingly moving toward automation and intelligence. direction development. [0003] The land in hilly and mountainous areas is usually undulating. If the usual way of connecting the suspension unit and the tractor is used, it will inevitably cause a large change in the position and posture between the farm implements and the ground, which will seriously affect the quality of work; in additio...

AI Technical Summary

Problems solved by technology

[0003] The land in hilly and mountainous areas is usually undulating. If the usual way of connecting the suspension unit and the tractor is used, it will inevitably cause a large change in the position and attitude between the farm implements and the ground, which will seriously affect the quality of work; in addition, the leveling of the tractor body will also affect The position and attitude between the suspension unit and the ground

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