Patent ID: 8715039
Filing Date: 2014-05-06
Classification: B24B

Abstract:
1. A machine tool providing a large grinding area, comprising: a tool body including a driving motor and a spindle connected to the driving motor and driven by the driving motor to spin axially; a rotary bracket which is coupled to and driven by the spindle and includes a plurality of connecting portions equally spaced from each other on the circumference formed by rotation of the rotary bracket and an inclined vane set located on each of the plurality of connecting portions to blow dust upward during grinding; and a plurality of grinding portions which are coupled to the plurality of connecting portions without contacting to each other, wherein each of the plurality of grinding portions includes a grinding zones and all the grinding zones are located at the same horizontal level, and wherein the plurality of grinding zones are driven by the rotary bracket to rotate synchronously therewith to jointly form a grinding plane.