| 摘要 |
An electric actuator replaces the hydraulic reach actuator in a reach carriage for a reach truck. The electric actuator may be a linear actuator and may have a rotary motor and a combination ball screw and ball assembly for converting the rotary motion of the motor into linear motion to extend and retract a rod. A force limiter can be disposed between the motor and the ball screw, and may be coupled to the motor and the ball screw. The force limiter prevents a contact force on the rod from damaging the motor. The force limiter allows the reach carriage to operate normally until a contact force occurs, then disengages if a threshold level of force is exceeded. The force limiter may be a torque limiter that automatically reengages after the contact force has attenuated. |
