| 摘要 |
PURPOSE:To improve the torque transmission efficiency of a rotor to a rotational shaft by providing a T-shaped key urged by a spring to a rotor rim between a spider and the rim, thereby concentrically effectively coupling the rim to the spider. CONSTITUTION:A T-shaped key 22 is provided at the end of a splider 16, and is engaged with a rotor rim 20 together with a cotter 24. A slot 28 for engaging the key 22 formed at the end of the spider 16 and a bolt-inserting hole 30 communicating with the slot 28 are formed at the central axial direction of the spider 16, a pressing bolt 32 is inserted through washers 34 of plural leaves or coil springs into the hole 30, and the key 22 is secured via a shrink fit liner 36 to the head surface of the bolt 32. Thus, the key 22 can be effectively followed by the elongation of the rim 20. |
