A brake shoe and drum brake system incorporating same

F - Mech Eng,Light,Heat,Weapons – 16 – D

Patent

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Details

F16D 65/08 (2006.01) F16D 51/24 (2006.01) F16D 65/00 (2006.01) F16D 65/833 (2006.01) F16D 69/00 (2006.01) F16D 69/04 (2006.01)

Patent

CA 2423355

A brake shoe (10) for a drum brake system (40) is provided with a brake lining (12) having a friction surface (14) which faces braking surface (60) of a brake drum (38). The lining (12) is characterised by the provision of one or more grooves (16) extending across the friction surface (14). The shoe (10) may be incorporated in a cooled drum brake system (10) in which cooling is provided by ventilation holes in the drum (38). Cooling may be further enhanced by the provision of ventilation holes (66) in a back plate (46) of the system (40). In an alternate system, cooling is provided by sealing the drum (38) to form a space for holding a volume of oil.

L'invention concerne un segment (10) de frein destiné à un système (40) de frein à tambour. Ce segment comprend une garniture (12) de frein présentant une surface (14) de frottement, appliquée sur la surface (60) de freinage d'un tambour (38) de frein. Cette garniture (12) est caractérisée en ce qu'elle comporte une ou plusieurs rainures (16) s'étendant transversalement à la surface (14) de frottement. Ce segment (10) peut être incorporé à un système (10) de frein à tambour à refroidissement, dans lequel le refroidissement est assuré par des orifices de ventilation percés dans le tambour (38). Le refroidissement peut en outre être amélioré par l'aménagement d'orifices (66) de ventilation dans le plateau (46) de frein du système (40). Dans une forme de réalisation différente, le tambour (38) est hermétiquement fermé et forme un espace pouvant recevoir un certain volume d'huile permettant de refroidir le système de frein.

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