Pushing unit of high-altitude unmanned auxiliary docking device for single-column steel pipe pole

The invention discloses a pushing unit of a single-column steel pipe pole high-altitude unmanned auxiliary butt joint device. The pushing unit comprises an annular support, an annular pushing plate, a pressing plate, a nut holder, a bolt holder and a third driving part. According to the nut and bolt pushing unit, an annular support is matched with a sliding rail, an annular pushing plate moves in the circumferential direction under the action of a driving piece, so that a pressing plate is driven to extrude a nut holder, the nut holder is made to do radial telescopic motion, the nut pushing work is completed, and the pushing position can be accurately controlled in combination with a proximity switch. The nut retainer can be smoothly withdrawn through the open design of the nut limiting platform, the bolt can be fixed through the bolt retaining platform and can penetrate through the platform, and the structural design is ingenious. And the limiting cavity is matched with the spring, so that the nut retainer c