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1.发明公开公开(公告)号：US20230278182A1
公开(公告)日：2023-09-07
申请号：US18005427
申请日：2021-02-22
CPC分类号： B25D11/06 , B25D16/00 , B25D17/22 , B25D2211/06 , B25D2250/095 , B25D2250/181
摘要： A hand-held power tool includes a tool fitting, an impact mechanism, and a rotary drive. The hand-held power tool is configured to rotate a tool held in the tool fitting with a rotational speed about a longitudinal axis of the tool and to drive the tool with an impact movement along the longitudinal axis at an impact frequency f. A ratio of the rotational speed to the impact frequency f at least at a working point of the hand-held power tool is at most 5.0 rpm/Hz or at least at the working point of the hand-held power tool the rotational speed is at most (0.2*(f/Hz-22){circumflex over ( )}2+80) rpm for impact frequencies f in a range from 20 to 60 Hz.
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2.发明公开公开(公告)号：US20230311289A1
公开(公告)日：2023-10-05
申请号：US18014100
申请日：2021-02-22
CPC分类号： B25D16/00 , B25D11/06 , B25D17/02 , B25D2217/0003 , B25D2216/003 , B25D2250/201 , B23B51/00
摘要： A hammer drill having an impact mechanism and a rotary drive, wherein the hammer drill is designed to rotate a tool at a speed n about a longitudinal axis of the tool and to drive it with an output impact power PS along the longitudinal axis with a striking movement is disclosed. At a working point, at least one condition is met: 1. The ratio of the output impact power PS to the speed n is at least 3.5 W/rpm; 2. Depending on the output impact power PS, the speed n is at most (PSAN−300)2/2000+150) rpm; 3. In the event of an infinitesimal change in the output impact power PS, the speed n changes by at most 0.1 rpm/W.
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