Hydrodynamic coupling with serially arranged damper units

US4637500A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Hilmar Gobel · Grafenrheinfeld, DE
• Harald Raab · Schweinfurt, DE

Key dates

• Filing date: May 13, 1983
• Grant date: Jan 20, 1987
• Expiry date: May 13, 2003

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2045/0231
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The hydrodynamic coupling comprises a pump wheel and a turbine wheel arranged rotatably coaxially in relation to the pump wheel in a hydrodynamic fluid cycle. With the pump wheel a housing (4) is connected fast in rotation, through which an internal combustion engine drives the pump wheel. A controllable bridge-over clutch having a torsional vibration damper (1) is connected into the torque transmission path between the housing and a drive-output shaft coupled with the turbine wheel. The torsional vibration damper (1) comprises two damper units (2, 6, 10 and 3, 7, 11, 12) connected in series with one another into the torque transmission path. Each damper unit comprises a disc part (5 and 6) coaxial with the rotation axis and a cover part (10 and 11, 12) axially adjacent to the disc part and rotatable in relation thereto about the rotation axis through a limited angle, and several springs (2 and 3) retained in ports (8, 30 and 9, 31) of the disc part and of the cover part and stressable in the relative rotation of the disc part and of the cover part. The two damper units are coupled fast in rotation with one another through an axially loose plug-in connection (13) engaging by virtue…