Plastic leaf spring with at least one spring-eye body or spring-eye section

US4696459A · kind A · utility

Assignee

• Isoport Verbundbauteile G.m.b.H. · AT

Inventors

• Herbert Woltron · Worms, DE
• Christian Huber · Zwingenberg, DE

Key dates

• Filing date: Oct 16, 1985
• Grant date: Sep 29, 1987
• Expiry date: Oct 16, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F1/3686
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A plastic leaf spring with spring-eyes at the spring-ends has a spring-eye section (1) or a spring-eye body (15, 28) of fiber-reinforced plastic, with the spring-eye section (1) integrated in the leaf spring body or the spring-eye body (15, 28) manufactured separately from it. The spring-eye section (1) or spring-eye body (15, 28) each contain a layer (2, 16, 29) of essentially constant thickness with a center section (4, 18, 31) wrapping the spring-eye opening, and two connecting sections (3, 17, 32) appropriately essentially parallel to each other, with the outside surface of the layer (2, 16, 29) forming a hollow groove (13, 24, 33) at least one transition between the center section (4, 18, 31) and the connecting sections (3, 17, 32). The strength of the plastic leaf spring according to the invention is substantially increased through appropriately plate-shaped reinforcing elements (11, 22, 34) form-locking and/or frictionally connected to each other, which at the outside adjoin the connecting sections (3, 17, 32) under pressure, and of which at least one touches the layer-surface also at a hollow groove (13, 24, 33).