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AssigneeHilti Aktiengesellschaft
InventorsMaximilian KNYRIM, Markus HARTMANN, Bastian PLÜMACHER, Olaf KOCH
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A hammer drill having an impact mechanism and a rotary drive, wherein the hammer drill is designed to rotate a tool at a speed n about a longitudinal axis of the tool and to drive it with an output impact power PS along the longitudinal axis with a striking movement is disclosed. At a working point, at least one condition is met: 1. The ratio of the output impact power PS to the speed n is at least 3.5 W/rpm; 2. Depending on the output impact power PS, the speed n is at most (PSAN−300)2/2000+150) rpm; 3. In the event of an infinitesimal change in the output impact power PS, the speed n changes by at most 0.1 rpm/W.
The hand-held power tool as claimed in claim 1, wherein the hand-held power tool has a multi-stage transmission.
The hand-held power tool as claimed in claim 1, wherein the hand-held power tool has a tool recognition device for identifying a type of tool used in a tool fitting of the hand-held power tool, and/or in that the hand-held power tool is configured such that the type of tool used in the tool fitting can be set by a user of the hand-held power tool.
The hand-held power tool as claimed in claim 1, having a pneumatic cuttings conveying device.
The hand-held power tool as claimed in claim 1, wherein the hand-held power tool can be operated wirelessly.
The hand-held power tool as claimed in claim 1 comprising at least one overrunning clutch, a gate-type transmission or a circular thrust transmission.
A tool for a hand-held power tool as claimed in claim 1, comprising a tool tip, a tool shaft and a shank for holding the tool in a tool fitting of the hand-held power tool, wherein a material transport channel is formed at least along the tool shaft, wherein the material transport channel has a minimum cross-sectional area of 19 mm2 or at least 6% of a cross-sectional area of a borehole which can be produced by the tool.
A hand-held power tool system, comprising a hand-held power tool comprising an impact mechanism and a rotary drive, wherein the hand-held power tool is configured to rotate a tool at a rotational speed n about a longitudinal axis of the tool and to drive the hand-held power tool with an impact movement along the longitudinal axis with an output impact power PS, and wherein the hand-held power tool is portable, wherein at least one of the following conditions is met at a working point of the hand-held power tool:
The hand-held power tool of claim 2, wherein the at least one drive unit is a motor.
The hand-held power tool of claim 3, wherein the output impact power PS is between 200 W and 1000 W, at least at the working point.
The hand-held power tool of claim 4, wherein the impact mechanism is an electropneumatic impact mechanism.
The hand-held power tool as claimed in claim 2, wherein the output impact power PS is between 200 W and 2000 W at least at the working point.
Dependencies are inferred from the claim text.