| 主权项 |
1. A drive assembly comprising:
a frame, an elongated drive member comprising an outer thread and defining an axis of rotation, the drive member being arranged axially locked but rotational free relative to the frame, an outer tube assembly arranged axially moveable relative to the drive member but non-rotational relative to the frame, comprising a nut member in threaded engagement with the drive member outer thread, a transmitter tube comprising an outer thread and being arranged:
co-axially with the drive member and inside the outer tube assembly,axially moveable but non-rotational relative to the drive member, andaxially locked but rotational free relative to the outer tube assembly, a drive tube in threaded engagement with the transmitter tube outer thread and being arranged: co-axially with the drive member, and axially moveable but non-rotational relative to the outer tube assembly,wherein the outer tube assembly comprises an outer tube portion coupled non-rotationally to the nut member corresponding to the axis of rotation, the outer tube portion being allowed to pivot relative to the nut member corresponding to at least one axis perpendicular to the axis of rotation. |
