| 摘要 |
<p>A lift truck having a parallel pair of drive trains, each powering a drive wheel (66, 76) on a different side of the lift truck. Each drive train includes a DC electric motor (52, 54) driving a variable displacement, hydraulic pump (58, 68) having a pressure output capacity of at least 3,000 psi. Each hydraulic pump is connected to a hydraulic motor (60, 70), having a rotational speed capacity of at least 3,000 rpm and is connected through a transmission (64, 74) to the drive wheel on a different side of the lift truck. The DC motor is run continuously at full rpm and the torque/speed ratio of the drive train is controlled by controlling the displacement of the hydraulic pump.</p> |
