| 摘要 |
A brake mechanism, particularly for trucks and buses, of the type wherein each shoe is independently anchored by a separate anchor pin, wherein the anchor pin of the secondary shoe is modified to have a generally eccentric cross-sectional configuration. The pin fits within a circular hole in the brake shoe, and the arrangement is such as to permit the shoe, when operating as a secondary brake shoe, to move outwardly at its end adjacent the anchor pin in a direction toward the brake drum when actuated. The arrangement does not, however, permit movement of the anchor pin end of the shoe in the opposite direction from its normal position, i.e., in a direction away from the brake drum. The improved mechanism results in increased braking effectiveness, more even wear of the brake lining, and vitually eliminates brake squealing.
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