Robert Boschgmbh

Herbert Franz

Manfred Frister

Georg Binder

Henning Fasterding

Gerhard Pfluger

Reinhold Wamsler

Gerhard Walker

To improve resistance to vibration and shock, while permitting ready access for replacement of brushes of an alternator, the remote end shield (8) is formed as a reinforced plastic injection-molded or pressure-cast structure, integral with a hub for the remote bearing of the rotor and the brush holder for the brushes engaging slip rings (10, 11) on the rotor shaft. An opening (33) extending from approximately the radially outermost part of the brush holder to the end of the remote bearing plate permits access to the brushes for maintenance or replacement. The surface region of the end plate is formed with an engagement surface (35) against which a voltage regulator can be attached, having a projecting terminal blade electrically connected with one of the brushes by a compression spring and/or an eyelet rivet and a pigtail attached thereto.

Easily serviceable alternator, particularly for vehicular use

To provide for effective lubrication of a vehicular-type alternator, the bearings (2, 4) positioned at the respective end plates (1, 5) are pressure-lubricated. An oil pressure supply duct (21) is directed towards the rear bearing (4) which is positioned within a chamber (23), the chamber communicating with the central longitudinal bore (24) extending through the shaft towards the drive bearing (2). The drive bearing is positioned within a second chamber (26, 29) and radial bores (25) extend from the central bore (24) in the shaft into the drive side chamber, the drive side chamber being connected to a drain duct 30. To provide communication between the end faces of the bearings, a sickle-shaped recess extends partially circumferentially around the outer race of the respective bearing in the zone of termination of the ducts (21, 30), and having an axial length longer than the respective outer race (34) of the bearing.

Pressure-lubricated automotive-type alternator

Bus strips of steel or brass, rivetted where necessary to the brush holder and to a flat plate member integral therewith serve to connect the terminals of the voltage regulator mounted on the flat plate to the brush holder and to terminals for positive and negative voltage, the exicitor winding of a generator and the D+ and D- terminals. The bus strips are soldered or welded to the terminals they connect so as to provide reliable connections for the life of the device. The negative terminal connection includes a bushing in a mounting eye of the flat plate and the positive terminal is provided as a pressure contact.

Voltage regulator for generators

A cooling plate of the unit is connected to each of the a.c. terminals of the alternator and each cooling plate carries the positive-side diode or diodes, the negative-side diode or diodes and the excitor field diode connected to that a.c. terminal. The cooling plates are mounted on a shaped insulating disk in which wires are embedded for connecting together the connection leads of the diodes. Provision is made for bringing out terminals for the connection of a regulator unit and for bringing out a terminal for one a.c. phase, as well as for attachment of the d.c. output terminals.

Growing community of inventors

Stuttgart, Germany

Herbert Franz