Hydraulic steering gear for land leveler

Abstract

A full hydraulic steering gear for graders belongs to the field of engineering machinery. The technical scheme of the present invention is: the steering gear is composed of a steering valve and a cycloidal motor; the part on the left side of the partition is a steering valve, the main components are a valve body, a valve core, and a valve sleeve, and the valve core is supported on the bearing of the valve cover , connected with the steering wheel with a connecting block, the valve core, valve sleeve and coupling are put together with a dial pin, the pin hole on the valve core is long, and there is a relative rotation of 20 to 70 between the valve sleeve and the right side of the spacer It is a cycloidal motor, the rotor and the coupling are connected by splines, the stator, the spacer and the end cover form the working chamber; there are four oil inlet and return ports connected to the external pipeline on the valve body, and two for the overflow The valve leads to the inlet and outlet ports of the oil pump and oil tank, and the other two lead to the left and right chambers of the steering cylinder. The beneficial effect is that the force for deflecting the wheels is entirely hydraulic pressure, which is especially suitable for construction machinery such as motor graders whose steering wheels are far away from the cab, and is easy to operate, labor-saving, compact in structure, safe and reliable.

Description

technical field [0001] A full hydraulic steering gear for graders belongs to the field of engineering machinery. Background technique [0002] The motor grader is a kind of machine that uses the scraper as the main working device to cut, scrape, level and shape the soil. It has wide application, high efficiency and good operation accuracy. It is widely used in roads, railways, airports, squares, Plastic operations in large areas such as farmland. The grader is mainly composed of an engine transmission system, a frame, a traveling device, a working device, and a hydraulic control system. The hydraulic control system is generally a high-pressure or medium-pressure system. In order to meet the requirements for movement speed and smoothness of movement, there should be sufficient flow and smoothness control measures. Motor graders generally use a hydraulic steering system to reduce the labor intensity of the driver, but the widely used hydraulic power steering system has the f...

AI Technical Summary

Problems solved by technology

Motor graders generally use a hydraulic steering system to reduce the labor intensity of the driver, but the widely used hydraulic power steering system has the following disadvantages: When the hydraulic system fails, the driver must control the steering wheel, through mechanical transmission, directly by manpower Make the wheel deflection; the driver's labor intensity is high, the operation is very laborious, the operation comfort is poor, and the system composition is complex, the reliability is poor, and the maintenance is inconvenient. It is urgent to overcome the technical difficulties and innovate and develop a new type of hydraulic steering system for motor graders.

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