14-05-2015 дата публикации
Номер: US20150128429A1
Принадлежит:
The disclosure relates to a transmission for a power tool, comprising an input gear driven by a driver, an intermediate shaft carrying first and second intermediate gears, the first intermediate gear being meshed with the input gear, an output shaft carrying an output gear, the output gear being meshed with the second intermediate gear for driving a tool bit, and proximal and distal bearings supporting proximal and distal ends of the intermediate shaft respectively. The first intermediate gear is formed with a receptacle portion which is recessed from a proximal end surface of the first intermediate gear in an axial direction towards a distal side, the proximal bearing being received in the receptacle portion at least in part in the axial direction. The disclosure also relates to a power tool comprising the above transmission. The disclosure provides a compact and robust structure. 1. A transmission for a power tool , comprising:an input gear driven by a driver of the power tool;an intermediate shaft carrying a first intermediate gear and a second intermediate gear, the first intermediate gear being meshed with the input gear;an output shaft carrying an output gear, the output gear being meshed with the second intermediate gear and configured to drive a tool bit of the power tool; anda proximal bearing supporting a proximal end of the intermediate shaft and a distal bearing supporting a distal end of the intermediate shaft,wherein the first intermediate gear is formed with a receptacle portion which is recessed from a proximal end surface of the first intermediate gear in an axial direction towards a distal side, the proximal bearing being received in the receptacle portion at least in part in the axial direction.2. The transmission of claim 1 , wherein each of the proximal bearing and the distal bearing is able to bear both an axial force and a radial force.3. The transmission of claim 2 , wherein one or more of the proximal bearing and the distal bearing is a ball ...
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