Power tool dust collecting device and power tool

摘要

A power tool dust collecting device (30) includes a fan chamber (34) and a dust collecting chamber (70). The fan chamber (34) is formed in a housing (31) which is mountable on a hammer drill (1) and in which a suction opening (62) is provided protrudingly. The fan chamber (34) houses a fan (50) that rotates in accordance with driving of a motor (36). The dust collecting chamber (70) is formed on an upstream side of the fan chamber (34). Mounted on the dust collecting chamber (70) is a filter (76) through which passes air that has been sucked up from the suction opening (62) by the rotation of the fan (50) and which collects dust included in the air. An air pumping unit (39) that pumps air from a downstream side of the filter (76) toward an upstream side is provided inside the housing (31).