Electric drive unit

US6288466A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Detlef Lauk · Renchen, DE
• Ernst Fischer · Anchorage, US
• Hansjoerg Karcher · Bühl, DE
• Juergen Herp · Laufenburg (Baden), DE
• Erik Maurer · Bühl, DE
• Andreas Wiegert · Kappelrodeck, DE
• Richard Hurst · Offenburg, DE
• Anton Waibel · Hagnau, DE

Key dates

• Filing date: Aug 25, 2000
• Grant date: Sep 11, 2001
• Expiry date: Aug 25, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2057/0213
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An electric drive unit having an electric drive motor and a transmission. The electric drive motor has an armature shaft which extends, for example, to a worm shaft of the transmission. The shaft is embodied of one piece with the armature shaft. A first bearing and a second bearing are provided to support the armature shaft. The second bearing is embodied as a ball bearing with an outer ring, an inner ring, and balls. The inner ring is press-fitted in a rotationally fixed manner onto the armature shaft. The outer ring is slid into a receiving bore disposed in the transmission housing and is pressed against an axial stop face adjoining the receiving bore by means of a retaining part that is supported in an installation channel and has flexible tongues that are directed toward the outer ring. This axial pressing can be produced in an easy-to-assemble fashion and is also inexpensive thanks to a low cost of the retaining part. The proposed electrical drive unit can be used, for example, for at least one windshield wiper of a vehicle.