Hilti Aktiengesellschaft

Hilti Aktiengesselschaft

Konrad Artmann

Martin Richter

Hans-Werner Bongers-Ambrosius

Udo Hauptmann

Helmut Burger

Tim Pr&ouml;ls

Martin Mayr

Tobias Schmid

Lothar Dietl

Markus Hartmann

Franz Popp

Hanspeter Schad

Josef F&uuml;nfer

Norbert Daam

Michael Bayerl

Harald Streicher

Thomas Schaefer

Johann Augustin

Josef Bauer

Stefan Goetzfried

Stefan Götzfried

Richter Martin

An electric motor containing a board holder and an angle measuring unit with at least one Hall sensor for detecting a rotation angle and at least two hooks for receiving and holding a winding wire, wherein the angle measuring unit is designed to commutate the electric motor as a function of the detected rotation angle. The board holder contains a pot-like recess with an end face, wherein the recess and the angle measuring unit are designed such that, in an assembled state, the angle measuring unit bears against the end face of the recess such that the angle measuring unit is positioned before the at least two hooks in an arrow direction.

Hall board inside the end windings

Rotor for an electric motor, having a rotor shaft and, mounted on the rotor shaft, a rotor core having a number of core laminations arranged along an axis of the rotor core. Each core lamination includes a central contoured aperture which is traversed by the rotor shaft and which includes at least two radially extending elevations and at least two cutouts positioned between the elevations, wherein, to form a press fit of the core laminations on the rotor shaft, a distance between the free ends of the elevations is less than a diameter of the rotor shaft, and wherein a duct extending peripherally on the rotor shaft is formed by the respective cutout in the successively arranged core laminations.

Connection of a rotor shaft to a laminated core

A power tool () is provided, especially a hammer drill and/or a chiseling hammer drill, including a percussive mechanism () with a percussive element () to generate a percussive pulse onto a tool (), the element being reversibly movable along a longitudinal axis (R) by a magnetic field in order to generate the percussive pulse, and including at least a first and a second coil device () to generate the magnetic field. Each coil device () has at least a first coil ring () with a first radius (R) and a second coil ring () with a second radius (R), whereby the first radius (R) of the first coil ring () is greater than the second radius (R) of the second coil ring (), so that a space (S) is formed, at least in certain areas, between the at least first and second coil rings (), whereby a fluid (L), especially an air stream, that serves to cool the coil device () can flow through the space.

Coil spacing

A power tool () having a striking means (), by which a percussive tool () that can be driven at least partially along an axis (A) struck directly and having a flushing bore () extending at least partially longitudinally through a tool shank (), and having a flushing head () having a radially inwardly open transverse bore hole () connected in a flow-through fashion with a fluid channel (). The flushing head () has at least one hollow cylindrical sleeve-like guide surface (), which is fitted for an insertion end () of the striking tool (). The striking means () sealed by a seal () is cup-like. The striking means () is moveably guided and made fluid tight by the seal () to embrace the machine-side part of the insertion end () having the machine-side open flushing bore ().

Percussive power tool with flushing head

An electrical module assembly includes an electrical module located in the module housing () and having an explosion-proof contactless switch () including a movable switching element () and an actuation element () for actuating the switching element () from outside, and a sensory electronics () for sensing movement of the switch element (), with the sensory electronics () being spatially separated from the switching element () by a separation section () of the wall () of the module housing ().

Electrical module assembly with an explosion-proof switch

An assembly for a percussion power tool includes a carrying handle ( ) and a flush head ( ) which is connected with the power tool chuck ( ) for flushing a working tool receivable in the chuck and which has an inlet opening ( ) for a flushing fluid and communicating with the working tool stem ( ), the carrying handle ( ) and the flush head ( ) forming a functional unit.

Carrying handle for a percussion power tool

A percussion electrical tool including an electrical motor ( ) located in a firedamp-protected housing ( ), control electronics ( ) for controlling operation of the electric motor ( ); an inverted rectifier ( ) connecting the control electronics ( ) with the electric motor ( ); an electronic module ( ) located in the housing ( ); an intermediate wall ( ) for separating the electronic module ( ) from a portion of a housing volume in which the electric motor ( ) is located, connected with the inverted rectifier in a heat-conductive manner, and having a fluid-cooled cooling medium conduit.

Rotary-percussion electrical tool

A support for supporting a power tool ( ) on a displacement carriage ( ) and including an attachment element ( ) for connecting the power tool ( ) with the carriage ( ), and a bolt insertable into an eyelet ( ) of the power tool ( ) for releasably connecting the attachment element ( ) with the power tool ( ) with the bolt ( ) having axial and radial conduits ( ) communicating with an outer cylindrical surface of the bolt ( ), so that predetermined position of the bolt ( ) in the eyelet ( ), a drilling fluid can be delivered through the bolt ( ) to fluid conduits ( ) of the power tool ( ).

Support for supporting a power tool on a displacement carriage

An electric tool device ( ) for an at least partially rotating and percussive striking driving mechanism with a pneumatic striking mechanism ( ), which is driven over a gear assembly ( ) by an electronically commutated electric motor ( ) with an internal rotor ( ) having poles ( ) and an external stator ( ), having field coils ( ) connected with a DC-AC converter of control electronics ( ), the power take-off side of the rotor shaft ( ) being mounted in the gear assembly ( ) and the driving end of the rotor shaft ( ) with the freely protruding poles ( ) engaging the stator ( ), being introduced coaxially into the stator ( ).

Percussive striking electric tool device

An electrical hand operated tool driving device ( ), such as a hammer drill, a combination hammer or a chipping hammer, has an electropneumatic striking mechanism ( ), for which a cooling medium ( ), for cooling the striking mechanism ( ), flows through a liquid-tight cooling medium duct ( ), which is disposed in a housing ( ) of the tool driving device ( ).

Electrical hand operated tool driving device with an electropneumatic striking mechanism

A working tool for use with a percussion power tool and including a cushioning elongate stem ( ), and a head ( ) connected with the stem ( ) for joint rotation therewith and for a limited axial displacement relative thereto, with the tool head ( ) being adapted, with respect to its resistance associated with its cushioning properties, to characteristics of the percussion piston ( ) of the power tool and with the tool stem ( ) and the tool head ( ) having mutually abutting each other end surfaces ( ) which form at least a partially flat contact upon abutting each other.

Working tool for a percussion power tool

A drilling and/or chiseling tool ( ) comprises a shaft ( ) and a cylindrical insertion end ( ) connected with the shaft ( ) with at least one elongated recess ( to ), open toward the outer surface of and toward the free end of the insertion end ( ) and forming a rotationally locking groove. A collar ( ) is disposed between the shaft ( ) and the insertion end ( ) and extends at least partially around the tool ( ) and projects at least radially outwardly of the shaft ( ) and of the insertion end ( ). The cylindrical insertion end ( )has a diameter not less than mm and preferably larger than mm. The at least one recess ( to ) has a cross-sectional area, extending perpendicularly to the axis of the tool ( ), and expands toward the outer surface and is provided essentially in the form of an arc of a circle. A tool chuck of a drilling and/or chiseling device, matched to the insertion end, is provided to receive the insertion end ( ) of the tool ( ) and fit rotationally locking bodies into the at least one elongated recess ( to ).

Drilling and/or chiseling tool

A percussion electrical hand-held tool including a housing ( ), a percussion element ( ) located in the housing, and a planetary gear unit ( ) located in the housing ( ) for converting a rotational movement ( ) of the drive shaft (&ohgr;) of the hand-held tool ( ) into a reciprocating movement (&ugr;) of the percussion element ( ), with the planetary gear unit ( ) including a sun gear ( ) changing of a setting (&agr;) of which provides for adjusting of an impact amplitude of the reciprocating movement (&agr;) of the percussion element ( ), and control unit located in the housing ( ) for adjusting the impact amplitude in accordance with a manual axial force applied to the handle of the hand-held tool ( ).

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Wörthsee, Germany

Konrad Artmann