| 摘要 |
<p>The purpose of the present invention is to provide a brake disk capable of effectively reducing noise such as brake noise by varying parameters of lightening holes of two brake disk plates. In the brake disk of the present invention, the two brake disk plates (2, 3) are superimposed in a manner such that the two brake disk plates (2, 3) are slid on each other by vibration occurring when the brake disk operates, and parameters relating to one or more of the lightening holes, plate thicknesses, diameters, bending are varied. In addition, the lightening holes (4) are formed in at least one of the brake disk plates (2, 3), and one or more parameters selected from the number of the lightening holes (4), the shapes of the lightening holes (4), the sizes of the lightening holes (4), and the positions of the lightening holes (4) are varied.</p> |
