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公开(公告)号：EP4397438A1
公开(公告)日：2024-07-10
申请号：EP23217807.9
申请日：2023-12-19
发明人： CHEN, Shuai , KE, Hongtao , WU, Yongkang , SUN, Chenwei , FAN, Baofeng , XU, Rui , XUE, Meng , TONG, Shubin , WU, Di , GOU, Jia
IPC分类号： B25B21/02 , B25B23/147
CPC分类号： B25B21/02 , B25B23/1475
摘要： An impact tool includes a controller for controlling a motor. The controller is configured to, when the direction of rotation of the motor is set to the reverse rotation direction, a drive shaft rotates at a first speed, and after an impact mechanism applies an impact force to an output shaft for a preset time, determine that a fastener is in a tightened state according to a load parameter of the output shaft and control the drive shaft to rotate at a second speed, where the second speed is greater than the first speed.
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公开(公告)号：EP4454816A1
公开(公告)日：2024-10-30
申请号：EP24160120.2
申请日：2024-02-28
发明人： CHEN, Shuai , KE, Hongtao , LI, Yang , FENG, Zhiwei , LIU, Longxiang , WU, Yongkang , LI, Guang
IPC分类号： B25B21/02
摘要： Provided is an impact tool. The impact tool includes an output shaft (400) for outputting torque, where the tightening torque of the output shaft (400) to a workpiece is greater than or equal to 750 N.m; and an impact assembly (300) that provides an impact force to the output shaft (400). A main shaft ball groove (311) includes a first ball groove (3111) that extends spirally about a main shaft axis (301) and is concave on an outer surface and a second ball groove (3112) that extends spirally about the main shaft axis (301) and is concave on the outer surface. An impact ball groove (321) includes a third ball groove (3211) that mates with the first ball groove (3111) to accommodate the rolling ball (350) and a fourth ball groove (3212) that mates with the second ball groove (3112) to accommodate the rolling ball (350). The included angle α between the first ball groove (3111) and the second ball groove (3112) is less than the included angle β between the third ball groove (3211) and the fourth ball groove (3212).
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