Marine propulsion device, propeller unit, and method
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorIsao TATEISHI
Life of this patent
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Abstract
A marine propulsion device includes a propeller, a propeller shaft, a bushing, a damper, and a spacer. The propeller shaft supports the propeller. The bushing is between the propeller and the propeller shaft and is unitarily rotatable with the propeller shaft. The damper is fixed to the bushing to transmit rotation of the propeller shaft to the propeller. The spacer is spaced apart from the propeller in a back-and-forth direction in front of the bushing to position the bushing in place with respect to the propeller shaft.
Claims14
A marine propulsion device comprising:
- a propeller;
- a propeller shaft to support the propeller;
- a bushing between the propeller and the propeller shaft and unitarily rotatable with the propeller shaft;
- a damper fixed to the bushing to transmit rotation of the propeller shaft to the propeller;
- and
- a spacer spaced apart from the propeller in a back-and-forth direction in front of the bushing to position the bushing in place with respect to the propeller shaft.
A propeller unit mounted to a propeller shaft of a marine propulsion device, the propeller unit comprising:
- a propeller supported by the propeller shaft to receive rotation of the propeller shaft transmitted thereto through a damper;
- and
- a spacer provided on the propeller shaft in front of the propeller and separated from the propeller in a back-and-forth direction.
A method of assembling a propeller unit to a propeller shaft of a marine propulsion device, the propeller unit including a propeller, a bushing unitarily rotatable with the propeller shaft, a damper fixed to the bushing to transmit rotation of the propeller shaft to the propeller, and a spacer to position the bushing in place with respect to the propeller shaft, the method comprising:
- fitting the spacer on the propeller shaft;
- and
- fixing the bushing to the propeller shaft with a gap between the spacer and the propeller in a back-and-forth direction after the spacer is fitted on the propeller shaft.
Dependencies are inferred from the claim text.