BRAKE DRUM WITH VENT HOLE AND COOLING SCOOP

摘要

One embodiment of a brake drum includes a cylindrical main body portion (12), a brake drum mounting flange portion (18), a brake drum transition portion (24), the brake drum transition portion extending between the cylindrical main body portion and the mounting flange portion, the transition portion having a plurality of vent openings (28), and one air scoop secured (34) at each of the vent openings, whereby rotation of the brake drum and air scoop induces air movement within a brake drum cavity defined by the main body portion. Each air scoop defines a louver opening (62) which faces the angular direction of drum rotation, an air channel in fluid communication with the louver opening and the brake drum cavity, and a deflection surface (64) located in the air channel. The deflection surface is positioned to re-direct air movement entering the louver opening at an angular direction, to a generally radial and inboard direction.