Broadband sander

The structure composition between lifting screw pair and frame in broadband sander belongs to the field of sander manufacturing. It includes sander, the two ends of the supporting cross-axle of the working platform are connected with the lifting screw pair respectively. The lifting screw pair is located in the frame and drives the supporting cross-axle of the working platform to move up and down, and the working platform is located on the supporting cross-axle of the working platform. Advantages: Firstly, it not only fundamentally solved the technical problems of water-proof and dust-proof of lifting screw pairs, but also greatly improved their stability; secondly, it effectively solved the problems of water-proof and dust-proof of lifting screw pairs, which not only ensured the synchronous accuracy of lifting and dust-proof between two groups of lifting screw pairs, but also greatly improved their service life.