Multi-layer shaft

US5052845A · kind A · utility

Assignee

• EMITEC Gesellschaft fuer Emissionstechnologie mbH · DE

Inventors

• Wolfgang Maus · Bensberg, DE
• Helmut Swars · Bensberg, DE

Key dates

• Filing date: Jan 10, 1989
• Grant date: Oct 1, 1991
• Expiry date: Jan 10, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T403/4924
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

For weight saving purposes and to make optimum use of the material there is provided a hollow shaft, to which drive elements such cams or end flanges are attached preferably by expanding the shaft in portions, made up of at least two layers including an outer layer, preferably produced of a material of a higher strength such as steel and an inner layer produced of a material of a lower strength, such as aluminum or titanium. If there are problems in achieving sufficiently secure fixing of the drive elements by expanding the hollow shaft in the regions to be expanded, it is possible to provide supporting rings which are deformed only plastically whereas the materials of the hollow shaft, as well as the drive elements themselves are deformed only elastically. The regions to be expanded are limited by seals on a pressure probe which is supplied with a pressurized fluid via a channel.