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公开(公告)号：US20240181609A1
公开(公告)日：2024-06-06
申请号：US18439466
申请日：2024-02-12
发明人： Mitchell Carlson , Ding Feng Hu , Zhiqiang Yu , Fanbin Zeng
CPC分类号： B25B21/026 , B25F5/02
摘要： An impact power tool includes a motor, an output shaft to which a tool bit is attachable for performing work on a workpiece, and an impact mechanism disposed between the motor and the output shaft for converting a continuous torque output from the motor to discrete pulses of torque upon the output shaft, the impact mechanism including a cylinder assembly, a cavity defined within the cylinder assembly containing a hydraulic fluid, and a collapsible member having a first end and a second end opposite the first end. The collapsible member is maintained in a shape coinciding with that of the cavity by fitment within the cavity, with the first and second ends being disconnected from each other. The collapsible member is collapsible to compensate for thermal expansion of the hydraulic fluid during operation of the impact mechanism.
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公开(公告)号：US11897095B2
公开(公告)日：2024-02-13
申请号：US17408898
申请日：2021-08-23
发明人： Mitchell Carlson , Ding Feng Hu , Zhiqiang Yu , Fanbin Zeng
CPC分类号： B25B21/026 , B25F5/02
摘要： A rotary power tool includes a main housing and a transmission housing coupled to the main housing. The transmission housing includes a bearing pocket open to a front of the transmission housing and defined at least partially by a radially inward-extending flange. The rotary power tool also includes an output shaft and a bearing positioned within the bearing pocket adjacent and in abutting relationship with the radially inward-extending flange for rotatably supporting the output shaft in the transmission housing. The rotary power tool also includes a radially outward-extending flange on the output shaft that radially overlaps at least a portion of the bearing on an opposite side of the bearing as the radially inward-extending flange. A line of action of an axial reaction force applied to the output shaft is directed to the transmission housing via the radially outwardly-extending flange, the bearing, and the radially inward-extending flange.
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公开(公告)号：US11097403B2
公开(公告)日：2021-08-24
申请号：US16309625
申请日：2017-08-25
发明人： Mitchell Carlson , Ding Feng Hu , Zhiqiang Yu , Fanbin Zeng
摘要： A rotary power tool includes a main housing and a transmission housing coupled to the main housing. The transmission housing includes a bearing pocket open to a front of the transmission housing and defined at least partially by a radially inward-extending flange. The rotary power tool also includes an output shaft and a bearing positioned within the bearing pocket adjacent and in abutting relationship with the radially inward-extending flange for rotatably supporting the output shaft in the transmission housing. The rotary power tool also includes a radially outward-extending flange on the output shaft that radially overlaps at least a portion of the bearing on an opposite side of the bearing as the radially inward-extending flange. A line of action of an axial reaction force applied to the output shaft is directed to the transmission housing via the radially outwardly-extending flange, the bearing, and the radially inward-extending flange.
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