Multi-speed transmission

US7645208B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Michael Kamm · Bodnegg, DE
• Gabor Diosi · Friedrichshafen, DE
• Josef Haupt · Tettnang, DE
• Gerhard Gumpoltsberger · Friedrichshafen, DE
• Peter Ziemer · Tettnang, DE
• Martin Brehmer · Tettnang, DE

Key dates

• Filing date: Apr 3, 2007
• Grant date: Jan 12, 2010
• Expiry date: Feb 5, 2028

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2200/2043
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The multi-speed transmission has rotatable shafts, planetary gearsets (RS1, RS2, RS3, RS4) and shifting elements (A, B, C, D, E). Carrier (ST4) of gearset (RS4) and the input shaft couple as shaft (1). Carriers (ST2, ST3) of respective gearsets (RS2, RS3) and the output shaft (AB) couple as shaft (2). Sun gears (SO1, SO4) of gearsets (RS1, RS4) couple as shaft (3). Carrier (ST1) of gearset (RS1) forms shaft (4). Sun gear (SO3) forms shaft (5). Ring gears (HO1, HO3) of gearsets (RS1, RS3) couple as shaft (6). Sun and ring gears (SO2, HO4) respectively of gearsets (RS2, RS4) couple as shaft (7). Carrier (ST2) is shaft (8). In the flow of power, elements (A, B) are respectively between shafts (3, 4) and a transmission housing; element (C) is between shafts (1, 5); element (D) is between shafts (6, 8); and element (E) is between shafts (5, 7).