公开(公告)号：US20170361447A1

公开(公告)日：2017-12-21

申请号：US15532597

申请日：2015-12-01

Applicant: Hilti Aktiengesellschaft

Inventor： Rainer ONTL ,  Damir CEHAJIC ,  Christoph DIEING

IPC: B25D17/24 ,  F16F7/104

CPC classification number: B25D17/24 ,  B25D2211/068 ,  B25D2216/0038 ,  B25D2217/0092 ,  B25D2250/005 ,  B25D2250/175 ,  B25D2250/201 ,  B25D2250/221 ,  F16F7/104

Abstract: The hand-held power tool has a tool holder (2) for holding a tool (4) along a working axis (12). A hammer mechanism (6) has a striker (15) that is moved periodically along the working axis at an impact rate. A drive control (18) of the hammer mechanism (6) sets the impact rate to a set point value. A vibration absorber (19) has an oscillator (21) that moves along the working axis (12) about a resting position and one or multiple springs (20) that drive the oscillator (21) back into the resting position. A calibration phase comprises the following steps: detection of an acceleration using the acceleration sensor (24); determination of a minimum of the acceleration by varying the impact rate in a range of between 90% and 110% of the set point value; and adjusting the set point to the impact rate associated with the ascertained minimum.