| 摘要 |
PURPOSE:To prevent buzzing phenomenon of a fan, by providing a means for transmitting the rotation between a plurality of fan drive shafts. CONSTITUTION:A rotation transmitting means, i.e. a V-belt 1, is stretched between cooling fans 4, 5 which are driven by means of motors 2, 3. The V-belt 1 between pulleys 6, 7 of the fans 4, 5 transmits the rotation. Frictional force functions between the pulleys 6, 7 and the V-belt 1, where force functions in the negative direction on a pulley at the side of higher rotation while force functions in the positive direction on a pulley at the side of lower rotation. Consequently, even when the rotation of fan varies, the V-belt 1 functions to equalize the rotation of both fans thus preventing the buzzing phenomenon of fan. |
