US 4,288,711 AGranted

Alternator-rectifier construction where sheet metal diode support plates support a bearing

AssigneeRobert Bosch GmbH

InventorsWalter Hagenlocher, Heinz Hesse, Karl Kleebaur, Christoph Kugel, Johann Kunz, Werner Lemke, Rudiger Sohnle

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Abstract

To form a compact combination structure which provides efficient cooling and ease of assembly, maintenance and repair, while reducing the number of elements necessary to be stocked for maintenance or repair purposes, the rectifier portion of the alternator-rectifier combination comprises two groups of rectifiers which are, respectively, set in openings of two disk-shaped support plates 15, 35, which have, each, ring-shaped portions 38 surrounding the shaft and radially projecting fins 39, 39'. One of the plates is formed with a hub to retain one of the bearings, the outer portion of the fins is apertured for attachment to the shell of the alternator, and additionally deformed to provide seating surfaces for accurate positioning, for example by externally applied punch marks, of the plate. An insulating spacer 43, 43' separates the two plates which are so positioned that the fins of one plate are opposite the gap between fins of the other, so that air drawn axially by a ventilating fan will cool both plates.

Claims27

Dependent claims

Mobile alternator-rectifier combination construction, particularly for automotive vehicles, having

a frame structure (11);
a stator (23, 24) secured to the frame structure and having an armature winding (24);
a rotor (26, 27, 28) having a rotor shaft (25);
two bearings (18, 21) journaling the rotor;
an end cover (13) secured to one end of the frame and retaining one (18) of the two bearings, and extending transversely to the axis of rotation of the shaft;
and two groups of rectifier diodes (36, 36') electrically connected to the armature winding,
and comprising, in accordance with the invention, two membrane-like disk-shaped sheet metal support plates (15, 35) positioned adjacent the axial end of the shaft remote from said end cover (13);
each support plate including
an essentially ring-shaped portion (38) surrounding the shaft and radially projecting fins (39, 39') defining gaps therebetween;
at least one (15) of the disk-shaped support plates being secured to the frame and the other (21) of said two bearings (18, 21) being secured to the ring-shaped portion (38) of said at least one (15) of the support plates (15, 35);
one group of rectifier diodes (36, 36'), each, being secured to a respective support plate
whereby at least one support plate forms the support for the other bearing (21) and a heat sink and heat dissipation element for the diodes thereon;
electrically insulating means (43, 43') interposed between said support plates;
and wherein the diodes (36, 36') of the groups of rectifier diodes are secured on the projecting fins (39, 39') of the disk-shaped sheet metal support plates (15, 35).

11 more elements

Dependencies are inferred from the claim text.