| 摘要 |
<p>A hub-bearing unit (10) has a rotatable hub (20) fixable to the wheel of the vehicle and a stationary bearing race (30) fixable to the vehicle for rotatably supporting the hub about an axis (x). An air cavity (23) is formed in the hub (20) with a radial passage (27) for letting pressurized air into the cavity (23) and an outlet for conveying pressurized air from this cavity to the tyre. The assembly further comprises a cam (80) integral with the stationary race (30) and cooperating with a piston (70) accommodated in the radial passage (27). Rotation of the hub causes the piston (70) to reciprocate along the passage (27) and let pressurized air into the cavity (23).</p> |
