Kit of parts comprising a nut configured to be moved manually or driven along an external screw thread extending in a longitudinal direction

A kit-of-parts, comprising:

• an outer post and an inner post that are rotationally locked and extendable relative to each other in a longitudinal direction, the inner post comprising an external screw thread extending in the longitudinal direction;
• a nut configured to form a mating engagement with the external screw thread of the inner post and configured to be driven along the external screw thread to selectively secure the inner post relative to the outer post in a drive mode;
• and
• a drive comprising
• a drive housing accommodating a drive motor, and
• a connector configured to connect the drive housing with the nut,
• wherein the nut comprises:
• a housing,
• a rotatable member that is rotatably arranged in the housing of the nut, said rotatable member comprising an internal screw thread that is configured to form a mating engagement with the external screw thread of the inner post, and
• a transmission disposed in the housing of the nut, the transmission being configured to be connected to the drive motor, the transmission comprising an input shaft that is connectable to the drive, said transmission being configured to selectively:
• rotate the rotatable member relative to the housing in the drive mode in which the transmission is driven by the drive, thereby also rotating the rotatable member relative to the external screw thread and moving the nut in the longitudinal direction along the external screw thread,
• wherein the nut is further configured to be moved manually along the external screw thread extending in the longitudinal direction in a manual mode, and
• the transmission is further configured to selectively:
• form a coupling between the housing the rotatable member in the manual mode in which the nut is manually rotated relative to the external screw thread, the coupling causing the rotatable member and the housing to jointly rotate relative to the external screw thread, thereby moving the nut in the longitudinal direction along the external screw thread.