Tire uniformity testing device and tire uniformity testing method

摘要

In a tire uniformity measurement, accurate tire uniformity is obtained from a measurement waveform immediately after a rotation of a tire is switched from a normal rotation direction to a reverse rotation direction. A tire uniformity testing device of the present invention includes a measurement unit 108 that obtains a force variation from a uniformity waveform corrected by a correction unit 109 that corrects the uniformity waveform so as to eliminate a shift gradient α existing in the uniformity waveform measured after a rotation of a tire T1 is reversed, and further includes an air-outflow regulation member 220 that regulates an from flowing into a tire T2 when a drum 205 retreats or advances.

主权项

1. A tire uniformity testing device comprising:
a spindle shaft to which a tire is attachable; and
a drum mechanism that rotatably supports a drum and presses the tire attached to the spindle shaft against an outer peripheral surface of the drum,wherein in a case where the drum mechanism reverses the rotation of the tire, the drum is caused to retreat while the contact state between the drum and the tire is maintained, the rotation direction of the tire is switched from the rotation in one direction to the rotation in the other direction, and the drum is caused to advance so that a load is applied to the tire, wherein the tire uniformity testing device further comprises:a correction unit that corrects a uniformity waveform so as to eliminate a shift gradient a existing in the uniformity waveform measured after the drum mechanism reverses the rotation of the tire; anda measurement unit that obtains a force variation from the uniformity waveform corrected by the correction unit.