摘要 |
PURPOSE:To prevent a brake from overheating, by installing plural spiral blades in te backside of a cap body, while constituting the generation of heat in a brake part so as to be absorbed outside the cap. CONSTITUTION:A cap circle formed by a spring rod 5 is adjusted in size, while a cap keeper 3 is thrust in the peripheral edge of a tire wheel 6, making up a clearance between a cap body 1 and the wheel 6, in which a cap is fitly installed. With this constitution, in time of car driving, a spiral blade 2 installed in the backside of the cap body 1 rotates together with the cap body 1 whereby air inside the cap is drawn out reversely against a wheel rotating direction. Accordingly, heat produced by braking force is emitted outside the wheel cap, thus overheat in a brake is preventable. |