发明名称 Drill having dust collecting device.
摘要 <p>An electric hammer drill including a vacuum dust collecting device (22) for collecting dust from an area of an article being drilled by a drill bit (21) wherein a hose (31) extending from a body (20) of the hammer drill is directly connected to an end of a movable first pipe (20) which is slidably received in a stationary second pipe (30). During a drilling operation, the first pipe (29) slides back and forth along the second pipe (30) as a suction hood (27) moves in a direction opposite to the direction of movement of the drill bit (21). Since a sliding portion between the first and second pipes (29, 30) is separated by the hose (31) from a path of conveyance of the dust, the first pipe (29) and the hood (27) connected thereto always move smoothly relative to the drill bit (21).</p>
申请公布号 EP0426321(A1) 申请公布日期 1991.05.08
申请号 EP19900311236 申请日期 1990.10.12
申请人 HITACHI KOKI CO., LTD. 发明人 WATANABE, YOSHIHIKO;OHMORI, YASUKI
分类号 B23B45/16;B23B47/34;B23Q11/00 主分类号 B23B45/16
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