Transmission actuator driven by an electric motor

US6893371B2 · kind B2 · utility

Assignee

• LuK Lamellen und Kupplungsbau Beteiligungs KG · DE

Inventors

• John Mills · Royal Oak, US
• Bernhard Boll · Wellesbourne, GB
• Geir Huseby · Vestfossen, NO
• Gunter Hirt · Steinach, DE
• Viggo Lauritz Norum · Kongsberg, NO
• Jan Oyen · Kongsberg, NO
• Lars Lein · Kongsberg, NO
• Nigel Barnes · East Meon, GB
• Simen Ronne · Kongsberg, NO

Key dates

• Filing date: May 7, 2003
• Grant date: May 17, 2005
• Expiry date: May 7, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19279
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An actuator for a motor vehicle transmission has a shift cylinder performing rotary actuating movements. An electric motor is arranged inside the shift cylinder and drives the latter either through a harmonic drive mechanism or a planetary drive mechanism. The arrangement provides a high reduction ratio and an efficient use of limited space.