| 摘要 |
<p>A floating type brake disk for the vehicle comprising a disk hub and friction plate united into one body with a minute gap left therebetween. In this disk, a collar (16) is inserted through the disk hub (10) and the friction plate (14) to be fixed to the disk hub (10) with a connecting bolt (17) piercing through the collar (16) and a nut (18) to mesh with the connecting bolt (16). A diametrally large stepped part (16a) is provided at the approximate center of the outer periphery of the collar (16) so as to form a gap between the disk hub (10) and the friction plate (14). One side surface (16b) of the diametrally large stepped part (16a) and the head (17a) of the connecting bolt (17) clamp the friction plate (14). The length of a shaft (16e) projecting from the other side surface (16d) of the diametrally large part (16a) is formed larger than the thickness of the disk hub (10). Such a structure as above can accommodate variation in thickness of the friction plate (14) due to thermal expansion and deformation of the braking surface of the friction plate (14) is prevented, causing no change in braking action.</p> |
