Adjustable lead screw assembly

The utility model relates to the field of lead screws, in particular to an adjustable lead screw assembly which comprises a supporting seat, an extension plate connected to the top of a protection box, a cooling fan arranged at the bottom of the extension plate, an adjusting block connected to the interior of an adjusting groove, an adjusting spring connected to the surface of the adjusting block, and an adjusting piece connected to the interior of a pre-tightening nut. The surface of the pressure sensor is connected with a lead screw sleeve, dust can be prevented from entering through an extension plate, the influence on the use effect and the reduction of the working efficiency can be avoided, heat dissipation is achieved through a heat dissipation fan, the lead screw is prevented from generating a large amount of heat, the service life is shortened, and aging of parts is accelerated, an adjusting block can be limited through an adjusting groove, and under the action of an adjusting spring, the adjusting bl