Patent ID: 6537142
Filing Date: 2003-03-25
Classification: B24B

Abstract:
A belt adjusting device for a belt sander, comprising:a seat provided respectively at two ends with a driving roller rotatable thereon, and a driven roller rotatable thereon, said driving roller pivoted at one end thereof with a motor spindle adapted to engage a motor and provided at the other end thereof with a free end, said driven roller being mounted at one end thereof on said seat and provided at the other end thereof with a free end; a sanding belt movably fitted with outer peripheries of said two rollers; a reduction gear set mounted on said free end of said driving roller and formed of a plurality of reduction gears and a shaft rod, said reduction gears being driven by said motor to actuate said shaft rod to rotate; a swiveling member provided at one end thereof with a long slot, and at the other end thereof with a push portion, said long slot intended for use in putting pivotally therethrough said shaft rod capable of sliding in said long slot to enable said push portion to swivel a predetermined angle; and an action rod disposed in one side of said seat such that said action rod is slidably disposed between said driving roller and said driven roller, and that said action rod is pivotally fastened at one end thereof with said free end of said driven roller, and further that the other end of said action rod is constantly in contact with said push portion of said swiveling member, thereby enabling said action rod to be pushed by said push portion to slide so as to push said free end of said driven roller to engage in an up-and-down displacement perpendicular to said motor spindle.