Robert Boschgmbh

Volker Hertweck

Walter Haussecker

Tarek Mili

Jie Bao

Martin Krieg

Holger Thoene

Franz Tasch

Peter Bohr

Dieter Depner

Dirk Buehler

Daniel Cettier

Peter Froehlich

Francois Schramm

Bernhard De Graaff

Guang Qiao

Otmar Hertwig

Daniel Kaeshammer

Alexej Weber

The invention relates to a method for producing a gear worm () which is located in particular on an armature shaft () of an electromotive drive unit (), wherein firstly a worm gear () having screw flanks () axially opposite one another on a longitudinal axis () is formed by means of a rolling tool, and subsequently a groove structure () which is concentric about the longitudinal axis () is formed on the screw flanks () by means of an additional process step. The invention also relates to a gear worm () produced according to the method according to the invention, and to a transmission drive unit () containing such a gear worm ().

Method for producing a gear worm which is located in particular on an armature shaft, and such a gear worm

The invention relates to a transmission device comprising a first gear wheel and a second gear wheel that is rotatably coupled thereto, wherein a damping element acting in the circumferential direction is provided axially between the gear wheels. According to the invention it is provided that the damping element can be tensioned by the gear wheels during the operation of the transmission device.

Transmission device

The invention relates to a drive and evaluation unit for displacing an object to be displaced, particularly for raising and lowering a side window in a motor vehicle. The drive includes a commutator motor with a stator having two diametrically opposed permanent magnets. The magnets have cross-sectional shapes of a respective peripheral contour segment, having a radial inner peripheral contour segment which encompasses an armature over a respective inner peripheral angle. The armature is provided with ten grooves spaced around its periphery for holding armature windings that are configured as lap windings. The evaluation unit includes a device for determining the rotational position of the armature by evaluating the ripple count of the armature current. According to the invention, the armature windings are configured as short pitch windings, and the inner peripheral angle of the radial inner peripheral contour segment of at least one of the magnets is between 101&#xb0; and 111&#xb0;.

Drive and evaluation unit

Growing community of inventors

Baden-Baden, Germany

Volker Hertweck