| 摘要 |
<p>PURPOSE:To prevent the contact section of a dust boot with a pad element from being fused and broken by letting a part high in heat resistance provided for the dust boot be brought into contact with the pad element when the dust boot is swelled up toward the pad element. CONSTITUTION:When a dust boot 9 is swelled up toward a shim 8, a dust boot thick wall section 10 high in heat resistance is provided for a part of the dust boot 9, which is brought into contact with a shim 8. When the brake is applied, heat is generated by friction between a disc rotor 5 and a pad 6, the heat is transferred to the shim 8 and a closed section 11, air in the closed section 11 is expanded, the dust boot 9 is then swelled up toward the shim 8 side, and the dust boot thick wall section 10 is brought into contact with the shim 8 high in temperature. Since the dust boot thick wall section 10 is brought into contact with the shim 8, the portion other than the dust boot thick wall section 10 of the dust boot 9 will never be brought into contact with the shim 8. The contact section of the dust boot thick wall section 10 can be prevented from being broken because its heat resistance is high.</p> |
