Invention Application
- Patent Title: HYDROSTATIC STEERING DEVICE
- Patent Title (中): 液压转向装置
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Application No.: PCT/EP1988000544Application Date: 1988-06-21
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Publication No.: WO1988010206A1Publication Date: 1988-12-29
- Inventor: ZAHNRADFABRIK FRIEDRICHSHAFEN AG
- Applicant: ZAHNRADFABRIK FRIEDRICHSHAFEN AG , TISCHER, Werner
- Assignee: ZAHNRADFABRIK FRIEDRICHSHAFEN AG,TISCHER, Werner
- Current Assignee: ZAHNRADFABRIK FRIEDRICHSHAFEN AG,TISCHER, Werner
- Priority: DEP 19870626
- Main IPC: B62D05/093
- IPC: B62D05/093
Abstract:
A hydrostatic steering device has a pump (2) connected to a tank (1), a steering valve (4) provided with a metering pump (6) and operated by a steering handwheel (7), and a steering cylinder (13). The steering has a variable working flow and a constant pilot flow. The pilot flow flows through a constant orifice (6) and the pressure drop across the constant orifice serves as a control signal for the flow rate in a pressure line (3). The metering pump is coupled mechanically with an adjustable orifice (15) through which the pilot flow passes. A pressure compensator (16) located between the constant orifice (6) and the adjustable orifice (15) is controlled by the differential pressure of the adjustable orifice. The load signal passes through a control line (18) which branches off between the constant orifice (6) and the pressure compensator (16) and travels to the pump (2) or, in a constant pump connected to a flow-dividing valve (21), to the flow-dividing valve.
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