Torsional vibration damper and helical compression spring for a torsional vibration damper

US6547227B1 · kind B1 · utility

Assignee

• LuK Lamellen und Kupplungsbau Beteiligungs KG · DE

Inventor

• Hartmut Mende · Bogen, DE

Key dates

• Filing date: Sep 25, 2000
• Grant date: Apr 15, 2003
• Expiry date: Nov 13, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2013/703
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A torsional vibration damper comprising at least two components which can be twisted against the resistance of at least one energy storage element, spring coils extending along its longitudinal axis. The components have forced-application areas for compressing the energy storage element. The invention also relates to a helical compression spring made of steel spring wire which has a plurality of coils along its length and can be compressed until it becomes blocked. Between its two terminal coils, the helical spring has at least two types of coils having different external diameters, namely a first larger external diameter and a second, smaller external diameter. Viewed along the length of the spring, these types of coils are arranged in sequence according to a certain patent and wound in such patent that the spring has diametrically opposed coil areas which in relation to the longitudinal direction of the helical spring, viewed in the radio direction, on one side are at least approximately at the same height, whereas the diametrically opposed coil areas of the two coil types are offset at least approximately by a value equal to the difference between their external diameters.