| 摘要 |
<p>CONTROLLER FOR ELECTRIC TRACTION MOTOR A controller (10) for the traction motor of an industrial truck comprises an actuator spool (56) which is axially shiftable by a manual selector member (12) for actuation a plurality of control switches (44, 46,48). Detent means (86,78,82,84) hold the spool in forward, reverse or park position and a return spring (66) urges the spool toward neutral position. The actuator spool (56) is adapted for rotational movement about its axis for automatic release of the detent means and return of the spool to neutral position. A seat occupancy detector (18) is actuated when the driver leaves the seat and imparts rotational movement to the spool which releases the detent means and returns the spool to neutral. The controller is also adapted to provide manual and automatic control of a parking brake (6). When the selector member is in the park position, cam means (184) on the actuator spool actuates a control switch (48) to apply the vehicle brake. When the selector member is in the forward, reverse or neutral position the control switch is operative to release the brake with the driver on the seat; if the driver leaves the seat the spool is rotated and actuates the control switch for applying the parking brake.</p> |
