公开(公告)号：US20180001462A1

公开(公告)日：2018-01-04

申请号：US15532632

申请日：2015-12-01

Applicant: Hilti Aktiengesellschaft

Inventor： Rainer ONTL ,  Frank KOHLSCHMIED ,  Christoph DIEING

IPC: B25D17/24 ,  B25D16/00

CPC classification number: B25D17/24 ,  B25D11/125 ,  B25D16/00 ,  B25D2211/068 ,  B25D2217/0092 ,  B25D2250/005 ,  B25D2250/175 ,  B25D2250/201 ,  B25D2250/221 ,  F16F7/1005 ,  F16F7/104

Abstract: A hand-held power tool has a tool holder for holding a tool along a working axis. A hammer mechanism has a striker that is moved periodically at an impact rate along the working axis between a turning point in the proximity of the tool and a turning point remote from the tool. A drive control of the hammer mechanism sets the impact rate to a set point value. A vibration absorber has an oscillator that moves along the working axis about a resting position and one or multiple springs that drive the oscillator back into the resting position. A first sensor is used to determine a phase of the motion of the striker. A sensor is used to determine a first phase of a compression point of the hammer mechanism. Another sensor is used to determine a second phase of a turning point in the proximity of the tool, of the hammer mechanism. A damping controller adapts the set point value in such a way that a phase difference between the first phase and the second phase is less than a threshold value.

公开(公告)号：US20220063078A1

公开(公告)日：2022-03-03

申请号：US17415354

申请日：2019-12-04

Applicant: Hilti Aktiengesellschaft

Inventor： Rory BRITZ ,  Rainer ONTL ,  Markus HARTMANN

IPC: B25D17/06 ,  B25D11/00

Abstract: The portable power chiseling tool has a tool holder, an electric motor, a striking mechanism and an idle strike catcher. The tool holder can receive a tool and retain it movably on a working axis. The striking mechanism includes an exciter piston, a striker, an anvil and a guide for the anvil. The exciter piston is coupled to the electric motor. The guide guides the anvil on the working axis. The idle strike catcher for the anvil has a conical inner surface facing the anvil. The anvil has an associated end face facing in the striking direction. The end face rests against the conical inner surface when the anvil is in its forwardmost position in the striking direction. The end face of the anvil has a first segment and a second segment in the circumferential direction. The second segment is offset in the striking direction relative to the first segment.

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.