ELECTRIC TOOL WITH DUST SUCTION FUNCTION, AND DUST SUCTION DEVICE FOR ELECTRIC TOOL

摘要

An electric tool provided with a dust suction function having excellent dust suction efficiency achieved by using a simple structure for sucking dust without leaving any residue in a hose. A fan shaft (15) rotating together with an output shaft (7) of a motor (6) and a suction fan (18) mounted on the fan shaft (15) are arranged in a dust suction chamber (11) formed in a hammer drill (1) having a dust suction function.  A one-way clutch (19) is mounted between the fan shaft (15) and the suction fan (18).  The one-way clutch (19) transmits rotation of the fan shaft (15) to the suction fan (18), and when the speed of the fan shaft (15) is reduced, the one-way clutch interrupts transmission of the rotation to the suction fan (18) to allow the suction fan (18) to rotate by inertia.