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US 10,293,907 B2Granted
Outboard motor
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsKazuyuki Kitajima, Shinichi Hoshiya, Masayuki Aritou
Life of this patent
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Abstract
An outboard motor includes an engine including a crankshaft that extends in a horizontal or substantially horizontal direction and perpendicular or substantially perpendicular to a direction of a thrust force, a cylinder, a first gear provided on a balance shaft disposed in a direction that intersects with a direction in which the cylinder extends, a second gear, a drive shaft, and a propeller.
Claims18
An outboard motor comprising:
- an engine including a cylinder in which a piston reciprocates and a crankshaft to which reciprocating movement of the piston is transmitted as a rotational motion, the crankshaft extending in a horizontal or substantially horizontal direction and perpendicular or substantially perpendicular to a direction of a thrust force of the outboard motor;
- a balance shaft disposed in a direction that intersects with a direction in which the cylinder extends and in a downward direction with respect to the crankshaft, the balance shaft extending parallel or substantially parallel to the direction in which the crankshaft extends, the balance shaft receiving a driving force from the crankshaft;
- a first gear provided on the balance shaft;
- a second gear to which a rotational force from the first gear is transmitted;
- a drive shaft connected to the second gear and extending in an upward-downward direction;
- a propeller rotated by a driving force of the drive shaft;
- and
- a bracket that mounts the outboard motor on a vessel body;
- wherein
- the first gear and the second gear are disposed above an upper end of the bracket.
7 more elements
An outboard motor comprising:
- an engine including a cylinder in which a piston reciprocates and a crankshaft to which reciprocating movement of the piston is transmitted as a rotational motion, the crankshaft extending in a horizontal or substantially horizontal direction and perpendicular or substantially perpendicular to a direction of a thrust force of the outboard motor;
- a balance shaft disposed in a direction that intersects with a direction in which the cylinder extends and in a downward direction with respect to the crankshaft, the balance shaft extending parallel or substantially parallel to the direction in which the crankshaft extends, the balance shaft receiving a driving force from the crankshaft;
- a first gear provided on the balance shaft;
- a second gear to which a rotational force from the first gear is transmitted;
- a drive shaft connected to the second gear and extending in an upward-downward direction;
- and
- a propeller rotated by a driving force of the drive shaft;
- wherein
- a rotational axis of the crankshaft is disposed forward of a rotational axis of the balance shaft.
6 more elements
An outboard motor comprising:
- an engine including a cylinder in which a piston reciprocates and a crankshaft to which reciprocating movement of the piston is transmitted as a rotational motion, the crankshaft extending in a horizontal or substantially horizontal direction and perpendicular or substantially perpendicular to a direction of a thrust force of the outboard motor;
- a balance shaft disposed in a direction that intersects with a direction in which the cylinder extends and in a downward direction with respect to the crankshaft, the balance shaft extending parallel or substantially parallel to the direction in which the crankshaft extends, the balance shaft receiving a driving force from the crankshaft;
- a first gear provided on the balance shaft;
- a second gear to which a rotational force from the first gear is transmitted;
- a drive shaft connected to the second gear and extending in an upward-downward direction;
- and
- a propeller rotated by a driving force of the drive shaft;
- wherein
- the balance shaft includes an eccentric shaft.
6 more elements
Dependencies are inferred from the claim text.