| 摘要 |
A cable winder mounted on a tractor for a construction machine, which uses an electric motor as a prime mover. In the present invention is installed a reel driven with a torque motor. The tension of a hanging cable and the torque of the torque motor is balanced when the machine stands still; when it moves forward, the cable is tensioned and the torque motor reverses, and the cable is unwound from the reel. When the machine moves backward, cable tension decreases, the torque motor normally moves to wind the cable on the reel.
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