IN-WHEEL MOTOR DRIVING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an in-wheel motor driving device excellent in durability and high in reliability by stably supplying lubricating oil to an entire region of a speed reduction section.

SOLUTION: This in-wheel motor driving device 21 includes: a motor A; the speed reduction section B; a wheel hub 32; and a speed reduction part lubricating mechanism supplying the lubricating oil to the speed reduction section. The speed reduction section lubricating mechanism includes: a lubricating oil passage 25c formed in a rotating member 25 at the side of a motor; a lubricating oil filler opening 25d extending from the lubricating oil passage 25c toward the outside diameter surface of the rotating member 25 at the side of the motor; a lubricating oil discharge opening 22b formed at a casing 22 and discharging the lubricating oil from the speed reduction section B; a circulating oil passage 22c allowing the lubricating oil discharged from the lubricating oil discharge opening 22b to flow back to the lubricating oil passage 25c; and a rotary pump arranged in the casing and circulating the lubricating oil by using the rotation of a rotating member 28 at the side of a wheel.

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