Infinitely variable toroidal drive

US6471617B1 · kind B1 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Walter Kuhn · Friedrichshafen, DE
• Jürgen Wafzig · Bermatingen, DE

Key dates

• Filing date: Dec 29, 1999
• Grant date: Oct 29, 2002
• Expiry date: Dec 29, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H57/021
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An infinitely variable toroidal drive comprising a housing (1), an input shaft (3), a torque converter (34), two input discs (5, 15) with toroidal surfaces, two output discs (6, 16) with toroidal surfaces wherein one input disc and one output disc each form a pair and the two output discs are arranged next to each other with mirror symmetry, several friction wheels for transmitting a torque from the input disc to the corresponding output disc, an output shaft (10) and a gearwheel system (8, 9) between output discs and output shaft, there being removably fastened on the transmission housing (1) a holding frame (2) having: an upper portion (28), a lower portion (29), fastening devices (20, 30 and 46, 47) for fastening pivots (42, 43 and 48, 49) and a bearing support member (7) which connects the upper portion (28) with the lower portion (29) and in which is situated at least one bearing (24) for the gear wheel (8).