Some functional parts of operating table and operating table

An operating table comprising a lifting device, the lifting device comprising:

• a stationary bottom column;
• a top column movable in the vertical direction;
• wherein the lifting device further comprises:
• a lifting mechanism for moving the top column in the vertical direction, wherein the lifting mechanism comprises a screw-and-nut transmission, which has a lead screw that is in operative connection with a drive motor, and a screw nut that is accommodated within and is fixedly connected to a nut housing, and the screw-and-nut transmission is configured to convert a rotary motion of the lead screw into a translational motion of the nut housing in the vertical direction, and
• wherein positioning and fastening of the top column and the nut housing are achieved by a lifting fork,
• wherein the nut housing on both sides has a first groove and a second groove that extend in a direction perpendicular to the lead screw, respectively, and the lifting fork has a base, a first arm for being fit inserted into the first groove, and a second arm for being fit inserted into the second groove.