Noise damped dynamo electric machine, especially vehicular type alternator

US4734600A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Gunther Bergan · Ludwigsburg, DE
• Manfred Frister · Schwieberdingen, DE
• Gerhard Henneberger · Asperg, DE
• Peter Lack · Schorndorf, DE
• Stefan Renner · Leonberg, DE

Key dates

• Filing date: Dec 1, 1986
• Grant date: Mar 29, 1988
• Expiry date: Dec 1, 2006

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K9/06
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In an apparatus for noise reduction and damping in ventilators of electric machines, in particular vehicular alternators, it is proposed that the ventilator support on the rotor shaft be effected by axially staggering inner rubber inlays on both sides and providing adjoining outer spring pressure elements such that the ventilator region is clamped, at least in the axial direction and preferably radially as well with an additional rubber ring. As a result, the transfer of resonant vibrations of the rotor to the ventilator are reliably avoided, and the noise emissions are decisively reduced.