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[CN 201610052231.6] Hydraulic-mechanical steering system for multi-axle semi-trailer
[CN 201610052231.6] A hydraulic-mechanical steering system for multi-axle semi-trailers Title: A hydraulic-mechanical steering system for multi-axle semi-trailers Application number: CN 201610052231.6 Applicant: Beijing Aerospace Launch Technology Research Institute; China Launch Vehicle Technology Application date: 2016-1-26 Patent type: Invention application for a hydraulic-mechanical steering system for multi-axle semi-trailers, including two sets of independent hydraulic systems, anti-yaw devices and steering mechanical structures for the front and rear wheels; the two sets of hydraulic systems have the same structure; each set of hydraulic systems includes two sets of steering control circuits that are redundant to each other; a set of steering The control circuit includes a steering signal cylinder, a steering cylinder, an accumulator and a safety valve group; the oil chamber of the steering signal cylinder is connected to the oil chamber of the steering cylinder through a pipeline, an accumulator and a safety valve group are installed on the pipeline in turn. The opening pressure of the accumulator is greater than the rated working pressure of the semi-trailer during normal steering; when the pressure of the hydraulic system exceeds the pressure protection range of the accumulator and reaches the protection pressure of the safety valve group, the safety valve group overflows and alarms; when steering, the steering cylinder in the hydraulic system is driven to extend or shorten through the power take-off mechanism of the gooseneck, the hydraulic system drives the steering mechanism installed on the front and rear wheels to realize the rotation of the wheels.
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