| 摘要 |
PROBLEM TO BE SOLVED: To use a supply passage for lubricating oil supplied to a first bearing (bearing 13) and a second bearing (bearing 14) in common. SOLUTION: In a lubrication structure in which lubricating oil is supplied from an oil passage 23 provided in a rotor shaft 8 or a rotary shaft 9 into a spline fitting part 22 constituted by fitting a male spline 20 formed on the rotor shaft 8 supported on the bearing 13 and a female spline 21 formed on the rotary shaft 14 supported on the bearing 14 mutually to lubricate the bearings 13, 14 using the lubricating oil flowing out of the spline fitting part 22, an oil chamber 25 which is nipped by the bearings 13, 14 and in which the lubricating oil flowing out of the spline fitting part 22 flows is partitioned among a housing supporting the bearings 13, 14, the rotor shaft 8, and the rotary shaft 9, and an oil sump 26 is formed on an inner peripheral face of the housing 24 constituting the oil chamber 25.
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