Lightweight reinforced brake drum and method for making same

B - Operations – Transporting – 62 – L

Patent

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Details

B62L 5/00 (2006.01)

Patent

CA 2559617

The invention provides a lightweight brake drum (10) comprising a lightweight, tubular inner member (14) having a reinforcement wrapping retention pattern (e.g., groove) cast in the exterior surface thereof, a length of reinforcement material (e.g., wrapped wire, cable, mesh, fibers, etc.) (16) in communication with a reinforcement retention pattern (e.g., a groove around the inner member) (14), the drum including an outer shell (18). The inner member (14) and the outer shell (18) are made of lightweight materials. Single, or multiple layers of reinforcement material (e.g. wrapping) are applied (e.g., wrapped) around the inner member (14) to support and inhibit expansion of the inner member (14). Because the reinforcement material (16) provides support against expansion, the inner member (14) and the outer shell (18) can be made of lightweight materials. In preferred embodiments, a bonding layer (66) is applied to the exterior surface of the inner member prior to application of the reinforcement material thereon. In preferred embodiments the reinforcement material comprises a low-impedance material such as copper along with another material that has good tensile strength characteristics (e.g., steel, composite fibers, Basalt-fibers, etc.). Preferably, the inner member comprises at least one material selected from the group consisting of a aluminum-based metal matrix composite (MMC) with a particulate reinforcement, ceramic matrix composite (CMC), and carbon graphite foam.

La présente invention concerne un tambour de frein léger (10) comprenant un élément interne tubulaire léger (14) qui présente un motif de rétention d'enveloppement de renfort (par ex. une rainure) moulé sur sa face extérieure, une certaine longueur de matériau de renfort (par ex. du fil enroulé, câble, maillage, fibres, etc.) (16) étant en communication avec le motif de rétention de renfort (par ex. une rainure autour de l'élément interne) (14), le tambour comprenant une coque externe (18). L'élément interne (14) et la coque externe (18) sont faits de matériaux légers. Une ou plusieurs couches de matériau de renfort (par ex. enveloppement) sont appliquées (par ex. enveloppées) autour de l'élément interne (14) pour supporter et inhiber l'expansion de l'élément interne (14). Comme le matériau de renfort (16) sert de support à l'expansion, l'élément interne (14) et la coque externe (18) peuvent être faits de matériaux légers. Dans des modes de réalisation préférés, une couche de liaison (66) est appliquée sur la face extérieure de l'élément interne avant application du matériau de renfort sur celui-ci. Dans des modes de réalisation préférés, le matériau de renfort comprend un matériau à faible impédance tel que le cuivre, avec un autre matériau qui a de bonnes propriétés de résistance à la traction (par ex. de l'acier, des fibres composites, des fibres de basalte, etc.). L'élément interne comprend de préférence au moins un matériau choisi dans le groupe qui comprend un composite matriciel métallique à base d'aluminium (MMC) avec un renfort particulaire, un composite matriciel céramique (CMC), et un expansé de graphite de carbone.

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