Transmission

US6336879B1 · kind B1 · utility

Assignee

• LuK Getriebe-Systeme GmbH · DE

Inventors

• Jochen Schmid · Welzheim, DE
• Oswald Friedmann · Lichtenau, DE

Key dates

• Filing date: Nov 3, 1999
• Grant date: Jan 8, 2002
• Expiry date: Nov 3, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H61/662
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A continuously variable transmission with two adjustable pulleys and an endless torque-transmitting chain trained over the pulleys has a torque sensor which transmits variable torque from the rotary output element of a prime mover (such as the engine of a motor vehicle) to the axially movable flange of one of the pulleys. The torque sensor comprises one or more rolling elements and cam faces and/or guide surfaces which confine the rolling element(s) to movements radially and/or axially of the respective pulley. At least the rolling element(s) and those components of the torque sensor which define the cam faces and/or the guide surfaces of the torque sensor are confined in a fluid-containing plenum chamber adjacent the axially movable flange of the one pulley to thus achieve a pronounced reduction of space requirements of the unit including the one pulley and the torque sensor in the axial direction of the one pulley. The fluid in the plenum chamber serves to urge the axially movable flange of the one pulley against the adjacent edge face of the chain and to thus urge the other edge face of the chain against the axially fixed flange of the one pulley.