Outboard motor

Patent metadata

Field	Value
Publication number	US-11148778-B2
Application number	US-202016935237-A
Country	US
Kind code	B2
Filing date	Jul 22, 2020
Priority date	Jul 25, 2019
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

An outboard motor includes an engine, an electric motor, a propeller that rotates due to a driving force from the engine and a driving force from the electric motor, and an anti-cavitation plate disposed above the propeller. At least a portion of the electric motor is disposed above the anti-cavitation plate and below a waterline of an outboard motor body.

First claim

What is claimed is:

1. An outboard motor comprising:
an engine;
an electric motor;
a propeller that rotates due to a driving force from the engine and a driving force from the electric motor; and
an anti-cavitation plate disposed above the propeller; wherein
at least a portion of the electric motor is disposed above the anti-cavitation plate and below a waterline of an outboard motor body.

2. The outboard motor according to claim 1 , further comprising a case to allow water to flow from an outside of the case into the case above the anti-cavitation plate and below the waterline of the outboard motor body; wherein
the at least the portion of the electric motor is housed in the case.

3. The outboard motor according to claim 2 , wherein the case includes a water storage that surrounds the electric motor and stores the water that has flowed from the outside of the case into the case.

4. The outboard motor according to claim 3 , further comprising a drive shaft that extends in an upward-downward direction of the outboard motor and rotates due to the driving force from the engine; wherein
the case includes an exhaust passage rearward of the drive shaft; and
the electric motor is disposed forward of the drive shaft.

5. The outboard motor according to claim 2 , further comprising a propeller shaft to transmit the driving forces from the engine and the electric motor to the propeller; wherein
the case includes a lower case that houses the propeller shaft and an upper case that houses the at least the portion of the electric motor, and the upper case is disposed above the lower case; and
a minimum width of the lower case in a right-left direction of the outboard motor is less than a maximum width of the electric motor in the right-left direction.

6. The outboard motor according to claim 2 , wherein the case includes a water inlet through which the water flows from the outside of the case into the case.

7. The outboard motor according to claim 6 , wherein the water inlet is provided on a side surface of the case.

8. The outboard motor according to claim 7 , wherein the water inlet is open to a front side of the outboard motor on the side surface of the case.

9. The outboard motor according to claim 6 , wherein
the case includes an anti-splash plate disposed above the anti-cavitation plate; and
the water inlet is disposed above the anti-cavitation plate and below the anti-splash plate.

10. The outboard motor according to claim 6 , further comprising a water pump to take in water from the outside of the case via a water intake and to supply the water that has been taken in to the engine due to the driving force from the engine; wherein
the water inlet is disposed above the water intake.

11. The outboard motor according to claim 10 , wherein the electric motor and the water pump overlap each other at a predetermined height of the outboard motor.

12. The outboard motor according to claim 11 , wherein the electric motor and the water pump are disposed adjacent to each other in a forward-rearward direction of the outboard motor.

13. The outboard motor according to claim 6 , further comprising a propeller shaft to transmit the driving forces from the engine and the electric motor to the propeller; wherein
the case includes a lower case that houses the propeller shaft and an upper case that houses the at least the portion of the electric motor, and the upper case is disposed above the lower case; and
the water inlet is provided in the upper case.

14. The outboard motor according to claim 6 , further comprising a propeller shaft to transmit the driving forces from the engine and the electric motor to the propeller; wherein
the case includes a lower case that houses the propeller shaft and an upper case that houses the at least the portion of the electric motor, and the upper case is disposed above the lower case; and
the water inlet is defined by a gap in a boundary between the upper case and the lower case such that water flows from the outside of the case into the case via the water inlet.

15. The outboard motor according to claim 6 , wherein the water inlet includes a plurality of water inlets.

16. The outboard motor according to claim 1 , further comprising an anode disposed below the waterline; wherein
the electric motor is disposed below the anode.

17. The outboard motor according to claim 1 , wherein the electric motor includes a lower end positioned above a lower end of the anti-cavitation plate, and an upper end positioned below the waterline.

18. The outboard motor according to claim 1 , wherein the electric motor includes a lower end positioned above a bottom of a hull.

19. The outboard motor according to claim 18 , further comprising a bracket to attach to the hull; wherein
the electric motor includes an upper end positioned below a lower end of the bracket.

20. An outboard motor attached to a hull, the outboard motor comprising:
an engine;
an electric motor; and
a propeller that rotates due to a driving force from the engine and a driving force from the electric motor; wherein
at least a portion of the electric motor is disposed above a bottom of the hull and below a waterline of the hull.

Assignees

• Yamaha Motor Co Ltd

Inventors

• Nakamura Daisuke

Classifications

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• B63H20/285

  Cooling-water intakes · CPC title

• B63H20/28

  Arrangements, apparatus and methods for handling cooling-water in outboard drives, e.g.} cooling-water intakes {(cooling circuits for outboard marine engines F01P3/202) · CPC title

• B63H20/245

  Exhaust gas outlets (B63H20/26 takes precedence) · CPC title

• B63H20/14

  Transmission between propulsion power unit and propulsion element · CPC title