NUT AND LEAD SCREW TYPE OPENING AND CLOSING MECHANISM FOR AUTOMATIC DOOR, AUTOMATIC VEHICLE DOOR, AND VEHICLE

Disclosed are a nut and lead screw type opening and closing mechanism for an automatic door, an automatic vehicle door, and a vehicle. The nut and lead screw type opening and closing mechanism for an automatic door comprises a driving device (10), a lead screw (20), a nut push block (30), and a push rod (40), wherein the driving device (10) is fixedly connected to a vehicle door (100), the lead screw (20) is rotatably mounted on the vehicle door (100), the nut push block (30) is sheathed on the lead screw (20), a first end of the push rod (40) is hinged to the nut push block (30), a second end of the push rod (40) is hinged to a vehicle body (200), and the driving device (10) drives the lead screw (20) to rotate so as to enable the nut push block (30) and the push rod (40) to move in a reciprocating linear manner along the lead screw (20), so that the push rod (40) drives the vehicle door (100) to open or close relative to the vehicle body (200). Fig. I