| 摘要 |
A center brake for automobiles is disclosed. The brake has triangular or trapezoidal braking teeth formed on the outer surfaces of the brake shoes and on the inner surface of the brake drum, thus to let perfect braking action. The brake does not use harmful material but use cast iron for braking means, thus to prevent the braking means from causing functional diseases of hearts and lungs of users and from causing environmental pollution. The brake also reliably carries out its returning action even in the case of malfunction of return springs and of freeze of the brake in the winter season. This brake can be handled by a switch, thus to facilitate handling of the brake. |
