Steering device for wheel loader
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United States of America Patent
Stats
-
Jul 21, 2015
Grant Date -
Mar 27, 2014
app pub date -
Apr 19, 2012
filing date -
Mar 29, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A steering device for a wheel loader includes a rotatable handle, a tiltable lever, a steering cylinder, a steering valve, a pump, a handle control valve, a lever control valve, and a handle prioritization valve. The steering valve controls a supply direction of operating fluid to the steering cylinder with pilot hydraulic pressure. The pump supplies operating fluid to the steering cylinder via the steering valve. The handle and lever control valves supply pilot hydraulic pressure to control the supply direction to the steering valve according to handle rotation and lever tilt, respectively. The handle prioritization valve shuts off the pilot hydraulic pressure supplied from the lever control valve to the steering valve according to a differential pressure or an absolute pressure in a hydraulic circuit produced due to operating fluid flowing through the handle control valve when the handle is operated.
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Family
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