Hohlstruktur aus faserverstärktem Kunststoff mit Lasteinleitungselementen

Research output: Intellectual PropertyPatent application/Patent

Contributors

Abstract

The invention relates to a light-weight hollow structure (1) made of fiber-reinforced plastic, particularly a hollow shaft or axle with structural elements, which are normally joined to shafts and axles, such as bearings, bearing rings, bearing shells, sprockets, sleeves, coupling parts, pulleys, wheels, cranks or cam plates made of metal, ceramic or plastic, and to a method for the production thereof. To this end, the invention provides that the hollow structure is shaped onto the inner contours of the load introducing elements. For production, the load introducing elements are inserted into a molding box, and a preform (2) of the hollow structure is placed in an expandable, flexible, radially drapable state upon the tool inner surface while remaining true to the contours, and upon the exposed contact surfaces of the load introducing element and, in this state, is consolidated under internal pressure. The advantages exist not only in the saving of weight due to the hybrid design, but also in the high flexibility of design possibilities. For example, antifriction bearings can be placed in the middle section of a shaft whose diameter is smaller than the diameter at both shaft ends. The fiber composite material used for the shaft dampens the vibrations introduced by the load introducing elements. Precise parts requiring no further work result by positioning all load introducing elements inside the shaping tool during production.
Translated title of the contribution
Hollow structure made of fiber-reinforced plastic with load introducing elements

Details

The invention relates to a light-weight hollow structure (1) made of fiber-reinforced plastic, particularly a hollow shaft or axle with structural elements, which are normally joined to shafts and axles, such as bearings, bearing rings, bearing shells, sprockets, sleeves, coupling parts, pulleys, wheels, cranks or cam plates made of metal, ceramic or plastic, and to a method for the production thereof. To this end, the invention provides that the hollow structure is shaped onto the inner contours of the load introducing elements. For production, the load introducing elements are inserted into a molding box, and a preform (2) of the hollow structure is placed in an expandable, flexible, radially drapable state upon the tool inner surface while remaining true to the contours, and upon the exposed contact surfaces of the load introducing element and, in this state, is consolidated under internal pressure. The advantages exist not only in the saving of weight due to the hybrid design, but also in the high flexibility of design possibilities. For example, antifriction bearings can be placed in the middle section of a shaft whose diameter is smaller than the diameter at both shaft ends. The fiber composite material used for the shaft dampens the vibrations introduced by the load introducing elements. Precise parts requiring no further work result by positioning all load introducing elements inside the shaping tool during production.
Original languageGerman
IPC (International Patent Classification)B29C 70/86
Patent numberWO 2005/105417
Filing date28 Apr 2005
Priority date29 Apr 2004
Priority numberDE102004021294
Publication statusE-pub ahead of print - 10 Nov 2005
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Keywords