| 摘要 |
A brake drum includes a generally cylindrical sidewall that defines at least part of a rub track, and a labyrinth that is generally open at one end and leads to a radially inwardly extending endwall at its other end. The labyrinth portion of the sidewall is preferably thicker than the rub track section. Also, in one presently preferred implementation, a transition between the sidewall and the radially inwardly extending face is thicker than the face and preferably has at least one that is portioned at least as thick as the rub track section. The brake drum may have a comparatively increased stiffness, which may reduce deflections or radially runout caused by eccentricity in the shape of the sidewall and resultant uneven friction and temperature loads in use.
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