초록 ▼

An actuator arrangement comprises a rotatable shaft, a nut mounted upon the shaft and translatable along the shaft upon rotation of the shaft relative to the nut, and a lock arrangement operable to lock the shaft and nut against relative rotation, the lock arrangement comprising a lock component mou

An actuator arrangement comprises a rotatable shaft, a nut mounted upon the shaft and translatable along the shaft upon rotation of the shaft relative to the nut, and a lock arrangement operable to lock the shaft and nut against relative rotation, the lock arrangement comprising a lock component mounted upon one of the shaft and the nut for axial movement relative thereto but held against angular movement relative thereto, the lock component being co-operable with an abutment provided on the other of the shaft and the nut, or a component associated therewith, to lock the shaft and nut to one another against relative rotation.

대표청구항 ▼

1. An actuator arrangement comprising a rotatable shaft, a nut mounted upon the shaft and translatable along the shaft upon rotation of the shaft relative to the nut, and a lock arrangement operable to lock the shaft and nut against relative rotation, the lock arrangement comprising a lock component

1. An actuator arrangement comprising a rotatable shaft, a nut mounted upon the shaft and translatable along the shaft upon rotation of the shaft relative to the nut, and a lock arrangement operable to lock the shaft and nut against relative rotation, the lock arrangement comprising a lock component mounted upon one of the shaft and the nut for axial movement relative thereto but held against angular movement relative thereto, the lock component being co-operable with an abutment provided on the other of the shaft and the nut, or a component associated therewith, to lock the shaft and nut to one another against relative rotation. 2. An arrangement according to claim 1, wherein a drive mechanism is provided, the drive mechanism being operable to retract the lock component away from the abutment. 3. An arrangement according to claim 1, wherein the lock component is spring biased towards a locking position. 4. An arrangement according to claim 1, wherein the lock component comprises a sleeve. 5. An arrangement according to claim 4, wherein the sleeve is splined to the shaft. 6. An arrangement according to claim 4, wherein the drive mechanism comprises a motor and gear arrangement operable to retract the sleeve. 7. An arrangement according to claim 2, wherein the drive mechanism comprises a solenoid actuator operable to retract the sleeve. 8. An arrangement according to claim 4, wherein a ballscrew arrangement is used to drive the sleeve for movement. 9. An arrangement according to claim 1, wherein the lock component is slidably mounted upon the nut. 10. An arrangement according to claim 9, wherein the lock component comprises a sleeve splined to the nut and co-operable with the abutment which is provided on or associated with the shaft. 11. An arrangement according to claim 2, wherein the drive mechanism includes a push member, moveable to push the lock component out of engagement with the abutment. 12. An arrangement according to claim 11, wherein a motor driven gear arrangement is used to move the push member. 13. An arrangement according to claim 12, wherein the motor driven gear arrangement also drives the shaft for rotation.