Robert Boschgmbh

Ulrich Bohne

Manfred Bleicher

Heiko Roehm

Karl Wanner

Dietmar Saur

Justus Lamprecht

Joachim Hecht

Uwe Engelfried

Eugen Hild

Joerg Lemmel

Otto Baumann

Axel Kuhnle

Steffen Tiede

Thomas Duerr

Rolf Mueller

Wilfried Kabatnik

Florian Schmehl

Jens Zieger

Janos Rakaczki

Carla-Maria Finck

Andras Markovics

Volker Lasch, Deceased

Andras Vigh

Jan Hiller

Janos Soltesz

Eugene Hild

Max Weinhardt

A machine tool device includes at least one drive train unit including at least one gear shift element and which has at least two different rotational direction modes and at least two different speed modes, and with at least one switching unit arranged at least partially on the drive train unit. The switching unit comprises at least one actuating element, which is configured to select the rotational direction modes and the speed modes, and at least one switching element, which is configured to switch between the modes of rotation depending on a switching position of the actuating element.

Power tool device

The disclosure relates to a switching device for a hammer drill, having a manually actuatable switching element. It is proposed that the switching element is designed for actuating an operational mode switching unit and a switching unit for changing the direction of rotation.

Switching device for a hammer drill and hammer drill comprising a switching device

A tool for use with is configured with a tool centering element and a fastening portion with form-locking elements for axial mounting and fastening onto a drive shaft of a hand-held power tool. The drive shaft is drivable in oscillating fashion and the centering element centers the tool relative to the drive shaft. The tool form-locking elements define a rotary position of the tool relative to the drive shaft. The centering element may be a through-hole in a fastening portion of the tool or, may be a fastening screw that passes through an axially centered through hole in the fastening portion to the tool for securing the toll and fastening screw in a bore within the drive shaft to which the tool is attached for intended operation.

Tool fastenable to a drive shaft of a hand-held power tool driveable in oscillating manner

A tool is configured with a centering element and a fastening portion with form-locking elements for axial mounting and fastening onto a drive shaft of a hand-held power tool. The centering element and the form-locking elements are arranged in a first tool part. The form-locking elements are located radially outside the centering element and are configured with a quadrangular cross section that corresponds to a trapezoidal cross section, which is perpendicular to an axis of the drive shaft.

Tool fastenable to a drive shaft of a hand-held power tool driveable in an oscillating manner

The invention relates to a hand-held electric power tool comprising at least one driven rotating part () that is mounted in at least one bearing (). According to the invention, the rotating part () is vibrationally decoupled from the bearing ().

Electric hand-held power tool

A tool holder for a hand-guided drilling device, in particular for a rotary hammer, includes a receiving sleeve that is designed as a single piece in particular and that is drivable in a rotating manner for a shank part of an insertion tool. The recess is open at both end faces and limited therebetween by an inner circumferential surface of the receiving sleeve. The inner circumferential surface () of the receiving sleeve () includes at least six flat circumferential surface sections (through) in the circumferential direction, with adjacent circumferential surface sections () forming an angle of 120 degrees.

Tool holder for a rotary hammer

The invention is based on a device having a centering element () and at least one form-locking element () for fastening an axially mountable tool () to a drive shaft (), which is drivable in an oscillating manner, of a hand-held power tool () in which the centering element () is provided for centering the tool () relative to the drive shaft (), and the form-locking element () is provided for defining a rotary position of the tool () relative to the drive shaft (). It is proposed that the form-locking element () is located radially outside the centering element ().

Device for fastening a tool to a drive shaft of a hand-held power tool driveable in an oscillating manner

An eccentric transmission having an imbalance compensation element (-) and having an eccentric element (-) for converting a revolving rotary motion of an armature shaft (-) into an oscillating rotary motion of a drive shaft (-) in order to drive an insert tool (-) of a hand-held power tool (-) to oscillate. The imbalance compensation element (-) is integral to another functional unit (-).

Eccentric transmission with an imbalance

The invention is based on a machine tool, in particular a circular power saw, for machining a workpiece, having a covering () for guarding a user against machining residues of the workpiece that occur in operation and having an adjustable residue guide () for carrying away at least some of the machining residues through an outlet opening in a defined direction in accordance with the position of the residue guide (). It is proposed that the residue guide is adjustable in such a way that in one position of the residue guide (), at least some of the machining residues are carried onward inside the covering ().

Machine tool

A machine tool, in particular a circular power saw, for machining a workpiece, has a covering () for guarding a user against machining residues of the workpiece that occur in operation and an adjustable residue guide () for carrying away at least some of the machining residues through an outlet opening in a defined direction in accordance with the position of the residue guide (). The residue guide is adjustable in such a way that in one position of the residue guide (), at least some of the machining residues are carried onward inside the covering ().

Adjustable chip guide for removing part of the chips of a machine tool

A hand-held power tool, in particular a sander, includes a housing () and a motor () located in the housing (). A driven shaft () that extends from a face end () of the housing () is drivable by the motor (). A suction conduit () extends at least partway through the housing (). The suction conduit () opens as an intake at the face end () of the housing ().

Hand-held power tool, in particular a sander

An electric hand power tool has a housing, an air-cooled electric motor which is accommodated in the housing, a tool which is driven by the electric motor a protective hood which at least partially covers the tool, the housing having a handle and an auxiliary handle for a two-hand guidance of the hand power tool, the auxiliary handle being positioned in a plane transverse to a plane of the first-mentioned handle and, with reference to a work direction, before the first-mentioned handle, the auxiliary handle being completely hollow and having an inlet communicating with the protective hood so as to carry motor cooling air which has left the housing and passed the protective hood for the tool and then flows into the inlet of the auxiliary handle carrying debris and through the auxiliary handle and out of the latter, so that the auxiliary handle is operative for damping a flow noise of the air from the electric motor, from a motor-cooling fan and from the tool.

Electric hand power tool

A hand power tool has a tool holder with a base body; a drive part; at least one locking body for connecting the base body of the tool holder with the drive part; a securing body which radially fixes the at least one locking body in an engaging position; an actuating element operative for unlocking the tool holder and guiding the securing body to a position which radially releases the locking body, the base body in a locking position surrounding at least a part of the drive part.

Hand power tool

Hammer drill

An impact hammer has a housing, a motor accommodated in the housing, an impacting mechanism accommodated in the housing and having a driver and a striker which is displaced by the driver in an axial direction and periodically strikes a shaft of a tool with the driver being tiltable about a tilting axis, a driving element which drives the driver into a reciprocating motion and a shaft which rotates the driving element. The driving element is provided with two interengaging eccentric parts including a first eccentric part which is non-rotatably connected with the shaft and a second eccentric part which is axially displaceable relative to the shaft. The eccentric parts have ring surfaces each surrounding the shaft, arranged asymmetrically relative to one another and being in contact with one another. The ring surfaces are offset relative to the one another so that a resulting eccentricity of the driving element relative to the shaft, which eccentricity acts on the driver, is adjustable between zero and a maximal value.

Growing community of inventors

Kohlberg, Germany

Ulrich Bohne