Outboard motor
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsYoshihito Fukuoka, Daisuke Nakamura, Hirotoshi Yamauchi, Sachiyo Hasegawa
Life of this patent
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Abstract
An oil supply device includes an axial oil passage and an intersecting oil passage provided in a propeller shaft, an axial oil passage and an intersecting oil passage provided in a drive shaft, and an oil guide passage. The intersecting oil passages allow oil inside the axial oil passages to be spouted radially of the shaft by centrifugal force generated as the shafts rotate. The oil is then supplied via the oil guide passage to an intermediate speed reduction device. As a result, it is possible to sufficiently lubricate an intermediate speed reduction device mounted on a drive shaft through a simple and compact arrangement.
Claims11
An outboard motor comprising:
- a casing including an engine including a vertically extending crankshaft, a drive shaft journaled vertically inside the casing, a propeller shaft journaled in a lower portion of the casing, and an intermediate speed reduction device arranged on the drive shaft such that rotation of the crankshaft is transmitted via the drive shaft to the propeller shaft;
- and
- an oil supply device arranged to circulate oil between the intermediate speed reduction device and the propeller shaft.
Dependencies are inferred from the claim text.