Importance

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Abstract

A power transmission device includes a partition wall dividing an oil reservoir into a first oil reservoir in which a final gear is accommodated and a second oil reservoir in which the final gear is not accommodated, an oil passage passing a lubrication oil to a bearing of a rotor shaft, to a bearing of an input shaft and to a reduction mechanism, an oil pump connected to the oil passage via an outlet port, and communicated with the second oil reservoir via an inlet port, a third oil reservoir provided at a position lower than the rotor shaft and receiving the lubrication oil at a position upper than the second oil reservoir, and a gutter-shaped member tilted so as to communicate with the third oil reservoir at an upper end and the second oil reservoir at an lower end, and crossing through or over the partition wall.

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First Claim