| 摘要 |
PURPOSE:To obtain a proper axial load according to conditions by interposing a spacer made of a shape memory material between a pair of taper roller bearings for rotatably supporting a drive bevel pinion shaft in a differential case. CONSTITUTION:By the fastening force of a nut 8, axial loads are given to taper roller bearings 4a, 4b, and the loads added to the bearings 4a, 4b are held constant by the presence of a spacer 20. As the spacer 20 is made of a shape memory alloy, the spacer 20 is laid in stretched state at the time of start and departure wherein the oil temperature in a differential case 1 is low, and the axial loads added to the bearings 4a, 4b are suppressed low, so that the start and departure can be easily conducted under low load. When the oil temperature is increased during running, the spacer 20 is laid in contracted state, and the axial loads added to the bearings 4a, 4b are relatively increased, reducing the gearing noise between a pinion 3 and a ring gear 5.
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