Infinitely variable toroidal drive

US6280360A · kind A · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

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

Key dates

• Filing date: Dec 29, 1999
• Grant date: Aug 28, 2001
• 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 inner surfaces, two output discs (6, 16) with toroidal inner surfaces, one input disc and one output disc each forming one pair and both output discs being disposed next to each other with mirror symmetry, several friction wheels for transmitting a torque from the input disc to the corresponding output disc, one output shaft (10) and one gear wheel system (8, 9) between output discs and output shaft wherein on the transmission housing (1) is removably fastened a holding frame (2) which has: one upper frame clamp (28), one lower frame clamp (29), one cup-shaped bearing support member (7) which connects the upper frame clamp with the lower frame clamp and upon which at least one gearing (24) for the gear wheel (8) is situated in a manner such that its inner ring is stationarily arranged and its out ring rotates together with the gear wheel (8).