| 摘要 |
<p>This invention effectively reduces the screeching (unpleasant sound) of a brake occurring when an automobile is braked. A rod is set up on the inner surface of a rim to which a brake lining is attached, and a weight is fixed to this rod via an elastic member. Since a weight is fixed to a brake shoe via an elastic member, the weight receives the vibration of the brake shoe and is vibrated. The vibration of the weight has a low frequency and a phase equal to that of the vibration of the brake shoe. However, as the vibration frequency of the brake shoe increases, the vibration phase of the weight deviates from that of the brake shoe. At a frequency in the vicinity of a certain level and not lower then the same, a phase difference becomes substantially 180 DEG . If this frequency is set in agreement with that of a screeching sound of the brake, the vibration of the brake shoe can be suppressed by that of the weight. It is possible to reduce the screeching sound of a brake of a large-sized vehicle, in which the size of a brake shoe is large, to a practically sufficient level by merely adding an inexpensive part to the brake, and maintain the original performance of the brake even when the brake lining is replaced. <IMAGE></p> |
