DUST EXTRACTION SYSTEM FOR A POWER TOOL

摘要

A dust extraction system (30) for a power tool (10) having a output shaft (12), a collet (13) configured for engaging a tool bit (B) and a collet nut (15) engageable to the output shaft (12). The system (30) comprises a base (32) configured for mounting on the power tool (10), the base (32) defining a cavity (38) having an opening (39) for passage of the output shaft (12) therethrough and a discharge chute (34) in communication with the cavity (38). The system (30) further includes an impeller (40) sized and configured to be rotatably received within the cavity (38), including a hub (42) and a plurality of vanes (44)emanating from the hub (42) configured to draw dust from the workpiece into the cavity (38) and to direct the dust through the discharge chute (34). A collet nut is integrated into the hub (40) of the impeller so that the impeller (40) can be directly mounted to the output shaft (12) of the power tool while clamping the collet (13) onto the tool bit (13).