| 摘要 |
PROBLEM TO BE SOLVED: To suppress deterioration of durability of a bearing for supporting a transmission shaft and a retaining portion for retaining the bearing. SOLUTION: When a radial reaction force of gear engagement works on the transmission shaft 1, a load due to this reaction force works on every ball 4c of a ball bearing 4 of supporting the shaft 1 and a retaining portion 3 of holding the bearing 4.To average a load on each ball 4c due to the operation of the reaction force and loads that the retaining portion 3 receives from the balls, a rigidity adjuster 6 for adjusting the peripheral rigidity of the bearing 4 in the retaining portion 3 so that the rigidity of a portion on which the reaction force works becomes lower than the rigidity of the other portions.This can prevent concentration of loads onto balls 4c and portions of the retaining portion 3 in the direction of operation of the reaction force and consequently suppress deterioration of durability of the bearing 4 and the retainer 3. COPYRIGHT: (C)2008,JPO&INPIT
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