Control drive with electric motor and planetary gear mechanism

US8142321B2 · kind B2 · utility

Assignee

• BÜHLER MOTOR GMBH · DE

Inventors

• Richard Guttenberger · Bad Abbach, DE
• Thomas Schreiber · Berlin, DE

Key dates

• Filing date: Oct 14, 2009
• Grant date: Mar 27, 2012
• Expiry date: Sep 21, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49464
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A control drive, consisting of an electric motor and a planetary gear mechanism flush with the electric motor on the same axis of symmetry, comprising a ring gear, a planet carrier and three planet gears mounted on the planet carrier, the planet gears each having a front surface in the assembly direction in the area of their external teeth and the ring gear in the region of its internal teeth having three angle areas assigned to the planet gears of its end opposite the assembly direction in a defined angle position of the planet carrier to ring gear. The task of the present invention is to ensure that an economical and time-decoupled simple and rapid assembly of the three planet gears in the ring gear is possible without increasing the manufacturing expense on this account, in which only slight changes to existing forms are necessary. This task is solved in that the axial spacing between the front surface of the first planet gear and the first angle area of ring gear assigned to it differs from the axial spacing between the front surface of the second planet gear and the second angle area of ring gear assigned to it and the axial spacing between the front surface of the third plane…