Belt sander

The utility model discloses a belt sander, including the frame, rotate and to connect in the action wheel of frame, lie in establishing in action wheel and the driven abrasive band that takes turns to from driving wheel, cover of action wheel top, still including lieing in the dead lever of fixed connection in the frame, setting up locating piece, mount pad, fixed connection in the sleeve of mount pad on the dead lever, driven round of rotation is connected on the mount pad, on the fixed and axial sliding sleeve of sleeve circumference located the dead lever, the cover was equipped with the spring that lies in between locating piece and the sleeve on the dead lever. The utility model has the advantages of it is following and effect: adopt the cover to establish the spring -supported mount pad on the dead lever and follow the driving wheel for the cover can be by automatic tensioning at action wheel and the driven emery wheel that takes turns to, secondly, passes through that the connecting rod drives the moun