A brake drum

Abstract

The application discloses a brake drum, comprising a steel shell layer and a gray cast iron layer, the gray cast iron layer is cast on the inner wall of the steel shell layer, the steel shell layer comprises a front section, a middle section and a tail section connected in sequence in the axial direction, the tail section comprises a reinforcing band, the thickness of the reinforcing band is greater than that of the middle section, the outer wall of the middle section is provided with reinforcing ribs in a wave configuration in the axial direction, the reinforcing ribs have 2-4 recessed areas; the length of the reinforcing ribs in the axial direction of the middle section is B, the maximum distance of the reinforcing band from the recessed areas in the radial direction is C, the safety factor of the reinforcing ribs is ξ=BxC, and ξ<=2000. The brake drum disclosed by the application sets reinforcing ribs in the middle section of the steel shell layer on the basis of a double-layer structure to enhance the axial stiffness of the brake drum, simultaneously increases the outer surface of the steel shell layer to accelerate heat dissipation, and limits the product of the recessed depth of the recessed areas and the axial length of the reinforcing ribs, so that the thinning effect of the recessed depth and the length of the reinforcing ribs on the material of the steel shell layer is reduced, and micro cracks caused by damage of the steel shell layer are avoided.

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