Winding mechanism with tension control function and trawling apparatus
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United States of America Patent
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Jan 11, 2011
Grant Date -
Jul 10, 2008
app pub date -
Jan 17, 2006
filing date -
Jan 18, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
To provide a winding mechanism and a trawling apparatus capable of eliminating an excessive tension or slack generated in a wire wound around a drum and keeping the tension or wire length of the wire constant.A winding mechanism with tension control function includes a reversibly rotatable liquid-pressure motor rotating a drum having a wire wound therearound, a liquid-pressure pump coupled directly with the liquid-pressure motor and supplying hydraulic oil, and an electric motor rotating to drive the liquid-pressure pump. The winding mechanism further includes a control unit controlling a torque of the electric motor based on a variation in load current of the electric motor and winding off or winding up the wire to keep the tension of the wire at a set value.
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