Patent ID: 9421679
Filing Date: 2016-08-23
CPC Classification: B23B,B25D,F16C

Claim Text:
1. A hand-held power tool, comprising: a housing; a tool holder; a drive shaft that is rotationally mounted in at least one first and one second ball bearing, the first ball bearing having a first inner ring, and the second ball bearing having a second inner ring, the tool holder being disposed on the drive shaft, wherein the second ball bearing is disposed axially immovably on the drive shaft and is supported axially displaceably in the housing; a spring element that (a) is disposed between the first inner ring and the second inner ring in order to prestress the first ball bearing with respect to the second ball bearing, and (b) abuts against both of the first inner ring and the second inner ring such that the spring element rotates with the same speed as the first inner ring and the second inner ring during rotation of the drive shaft; a notched mechanism for impact generation for the drive shaft, the notched mechanism being situated between the second ball bearing and the tool holder; and a blocking member configured to block an axial shift of the second ball bearing and the drive shaft in a direction away from the tool holder in a drilling operation or screwing operation and to unblock an axial shift of the second ball bearing and the drive shaft in a direction away from the tool holder in an impact operation.