| 摘要 |
A tire uniformity measuring instrument which does not suffer from a temperature drift and assures accurate measurement of uniformity of a tire. The instrument comprises a spindle to which a tire is removably fixed for coaxial integral rotation, a holder, bearing means for supporting the spindle for rotation around an axis on the holder, a drum supported for rotation around a fixed axis parallel to the axis of the spindle, means for driving the drum to rotate, means for moving the the holder in a direction perpendicular to the axis of the spindle until a tire connected to the spindle is contacted with the drum to allow the tire to be rotated by the drum when the drum is driven to rotate, and a detector held on the holder for measuring uniformity of a tire fixed to the spindle when the tire is rotated by the drum. The holder has a cooling water passage formed therein in the proximity of the bearing means, and cooling water is circulated in the cooling water passage in the holder and cools the holder and the bearing means on the holder. |
