定位置予圧下における円すいころ軸受のアキシアル荷重変化に関する研究

（円筒型ハウジングの場合）

抄録

Fixed position preload is used for a wheel hub, a differential gear box, etc. because it is more compact and rigid than the constant pressure preload. However, as a disadvantage, it is very susceptible to dimensional change, and the preload amount greatly changes due to heat generation and wear. Especially, since tapered roller bearings have larger heat generation and wear than ball bearings, it is necessary to pay sufficient attention when using them at position preload. In this paper, we performed a test simulating the actual use environment of bearings using an apparatus that measures the axial load change with a cylindrical housing, and observed the change in axial load during operation. As a result, it was found that there are two kinds of change in preload, one by dynamic factor and one by static factor. Furthermore, it was revealed that the change of the preload of the dynamic factor is greatly influenced by the formation of the oil film.