JP4923708B2 - Electric outboard motor - Google Patents

Description

  The present invention relates to an electric outboard motor which is provided outside a hull and propels the hull by driving an electric motor.

  Conventionally, a gasoline engine is generally used as a power source for an outboard motor. However, the gasoline engine has a complicated structure such as a fuel system and a lubrication system, and gasoline, lubricating oil and exhaust gas are underwater. It has many problems, such as pollution of the environment by being discharged. In view of these problems, an electric outboard motor having an electric motor as a power source has been proposed in recent years.

As this type of conventional electric outboard motor, for example, a motor room is provided above a support portion that fixes the outboard motor main body to the hull, and an electric motor is accommodated in the motor room (for example, Patent Document 1) and an outboard motor main body that is divided into three units in the vertical direction and an electric motor is accommodated in a middle case of a middle unit located in the middle part (for example, patents) are known. Reference 2).
JP 2005-153727 A JP 2005-162055 A

  However, in the electric outboard motor disclosed in Patent Document 1 described above, since the heavy electric motor is accommodated in the motor room above the outboard motor body, the outboard motor body There was a problem that the center of gravity of the vehicle became high and the stability of steering was lacking.

  In addition, since the motor room has a shape protruding upward, the motor room becomes an obstacle when fishing or fishing, and there is a problem that workability is poor.

  On the other hand, in the electric outboard motor disclosed in Patent Document 2 described above, a steering bracket is provided on a swivel bracket that is tiltable in the vertical direction with respect to the hull, and an electric motor is provided behind the steering bracket. A middle case that houses the motor is arranged. In other words, since the outboard motor main body protrudes rearward from the steering center, the center of gravity of the outboard motor main body is moved rearward from the steering center, and the steering stability can be maintained in a good state. There were problems such as being unable to do so, and outboard motors becoming larger.

  Furthermore, because the center of gravity of the outboard motor is moved away from the tilt axis of the swivel bracket, the so-called tilt that lifts the outboard from the surface of the water when the hull is moored or submerses the outboard in the water again. There was also a problem that much labor was required when performing the up work.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to provide an electric outboard motor capable of improving the stability of steering, achieving a compact size, and easily performing a tilt-up operation. To do.

  In order to achieve the above object, the present invention provides an electric outboard motor that is provided outside a hull and that propels the hull by driving an electric motor, the clamp bracket being fixed to the hull, and the clamp bracket. And a swivel bracket provided so as to be tiltable in the vertical direction, and a motor housing formed integrally with the swivel bracket below the swivel bracket and housing the electric motor.

  A steering bracket provided at the upper part of the motor housing so as to be pivotable to the left and right, and a drive shaft provided at the lower part of the motor housing so as to be pivotable and coupled to the lower end of the output shaft of the electric motor. A drive shaft housing and a connecting member for connecting the steering bracket and the drive shaft housing may be provided, and the steering bracket and the drive shaft housing may be provided with the same rotation axis. .

  In addition, a grip portion may be provided on the connecting member.

  Furthermore, a battery storage unit that stores a battery that supplies power to the electric motor may be provided on the steering bracket.

  Furthermore, a battery housing portion that houses a battery that supplies electric power to the electric motor may be provided behind the motor housing, and the battery housing portion may be formed integrally with the drive shaft housing.

  Furthermore, a control unit housing portion that houses a control unit that controls the electric motor may be provided on the upper surface of the swivel bracket.

  ADVANTAGE OF THE INVENTION According to this invention, stability of steering can be improved, compactness can be achieved and workability can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, FIG. 1 is a sectional view showing the electric outboard motor according to the present embodiment, and FIG. 2 is a plan view showing the electric outboard motor.

  This electric outboard motor 1 includes a pair of left and right clamp brackets 2, a swivel bracket 3 provided so as to be tiltable in the vertical direction with respect to the clamp bracket 2, and an outboard motor main body 4 carried on the swivel bracket 3. Consists of the subject.

  Each clamp bracket 2 is fixed so as to sandwich the upper end of the stern plate 6 with respect to the hull 5, and legs 7 are formed in parallel at the lower ends so as to face each other. A plurality (five in the figure) of pin holes 8 are formed in each leg portion 7, and each pin hole 8 is arranged in a substantially arc shape in side view with the tilt shaft 9 as the center.

  The swivel bracket 3 is disposed so as to be fitted between the clamp brackets 2, and the upper part of the swivel bracket 3 is pivotally supported on the upper part of the clamp bracket 2 via the tilt shaft 9, so that the swivel bracket 3 can be tilted in the vertical direction. It has become. A projecting portion 10 is formed at the lower end of the swivel bracket 3, and the projecting portion 10 abuts on a tilt pin 11 inserted into the pin hole 8 of the clamp bracket 2, thereby lowering the lower limit position of the outboard motor body 4. It is supposed to be fixed.

  Further, a control unit housing portion 12 is formed in a concave shape on the upper surface of the swivel bracket 3, and the control unit housing portion 12 has a control for controlling the operation of the electric motor 13 that is a power source of the outboard motor 1. The unit 14 can be stored. Further, in the hull 5, a rechargeable battery 15 such as a lithium ion battery for supplying electric power to the electric motor 13 is disposed. The battery 15 is electrically connected to the electric motor 13 via the battery cable 16. Connected.

  The outboard motor body 4 includes a motor housing 17 formed integrally with the swivel bracket 3 below the swivel bracket 3, a drive shaft housing 18 provided at a lower portion of the motor housing 17, and a lower portion of the drive housing 18. The lower case 19 is provided.

  In the motor housing 17, the electric motor 13 is accommodated in the vertical direction, and a rib 20 is formed in the vertical direction on the outer peripheral portion of the motor housing 17. By forming the rib 20 in this way, the rigidity of the motor housing 17 can be increased, and the heat generated from the electric motor 13 can be efficiently released to the outside.

  Further, the motor housing 17 is formed with openings at the top and bottom, the upper opening is sealed by a lid member 21 via a seal member, and a steering bracket support portion 22 is formed at the center of the lid member 21. It is formed in a concave shape. A steering bracket 24 is pivotally supported on the steering bracket support portion 22 via a thrust bush 23 so as to be turnable to the left and right. Further, a steering handle 26 is attached to the steering bracket 24 via a handle bracket 25. It extends toward the front.

  The steering handle 26 is provided with a slot grip 27 at the tip thereof, and by rotating the slot grip 27, the output of the electric motor 13 can be adjusted. Further, on the upper surface of the steering handle 26, changeover switches 28a and 28b for switching the forward rotation (forward) and the reverse rotation (reverse) of the electric motor 13 to a position close to the slot grip 27 are provided.

  On the other hand, a bearing 30 that rotatably supports the output shaft 29 of the electric motor 13 is provided at the lower opening of the motor housing 17, and a seal member is provided around the lower end of the output shaft 29 below the bearing 30. 31 is sealed.

  A drive shaft 32 extending downward is splined to the lower end of the output shaft 29 of the electric motor 13, and the drive shaft 32 is accommodated in the drive shaft housing 18. The upper end portion of the drive shaft housing 18 is rotatably connected to the lower end portion of the motor housing 17 via a thrust bush 33, and the drive shaft housing 18 has the same rotating shaft as the steering bracket 24. Is provided.

  The steering bracket 24 and the drive shaft housing 18 are connected by a connecting member 34 that passes behind the motor housing 17. The connecting member 34 has an approximately U-shaped arm shape in a side view, and an upper end portion is fixed to the upper surface of the steering bracket 24 and a lower end portion is fixed to upper portions on both side surfaces of the drive shaft housing 18. A grip portion 35 is provided in the substantially central portion. As a result, when the electric outboard motor 1 (drive shaft 32) is transported in a horizontal state, the grip portion 35 is positioned immediately above the center of gravity of the electric outboard motor 1. The labor for carrying the electric outboard motor 1 after being removed can be reduced.

  The lower case 19 is fixed to the lower end of the drive shaft housing 18, and houses a lower end portion 36 of the drive shaft 32 and a propeller shaft 38 connected to the lower end portion 36 via a bevel gear 37. A propeller 39 is attached to the rear end of the propeller shaft 38. Thereby, the output of the electric motor 13, that is, the rotation of the output shaft 29 is transmitted from the drive shaft 32 to the propeller shaft 38 via the bevel gear 37, and the propeller 39 is rotated.

  In the outboard motor 1 having such a configuration, when the steering handle 26 is rotated in the horizontal direction by a desired angle when the hull 5 is steered, the steering bracket 24, the drive shaft housing 18, and the lower case 19 follow the rotation of the steering handle 26. , And the propeller 39 rotate together to propel the hull 5 in a desired direction. At this time, since the heavy electric motor 13 is accommodated in the motor housing 17 formed integrally with the swivel bracket 3 below the swivel bracket 3, the center of gravity of the outboard motor 1 can be kept low. The electric motor 13 can be brought close to the hull 5 side. Further, since the steering bracket 24 and the drive shaft housing 18 are connected by the connecting member 34 and the electric motor 13 which is a heavy object does not rotate when the hull 5 is steered, the steering load can be reduced. Therefore, according to the above-described electric outboard motor 1 according to the present embodiment, the stability of the hull 5 during steering can be enhanced.

  Furthermore, since the drive shaft housing 18 and the steering bracket 24 are provided with the same rotation axis, the outboard motor main body 4 can be made compact. Since it does not protrude upward from the stern plate 6 of the hull 5, tilt-up operation and trim-up operation can be easily performed, and the outboard motor main body 4 does not get in the way when fishing or fishing, and the rear of the hull 5 Workability can be improved.

  In the above-described embodiment, the battery 15 is disposed in the hull 5, but this is merely an example. For example, a battery housing portion may be formed in the connecting member 34, or FIG. As shown, the battery storage 41 may be provided on the steering bracket 24. In these cases, since the work space in the hull 5 is expanded, the workability can be improved, and the electric outboard motor 1 can be transported alone, so that the transportability can be improved.

  Further, as shown in FIG. 4, the battery housing portion 51 is formed integrally with the drive shaft housing 52 at the rear of the motor housing 17, and the upper surface of the battery housing portion 51 and the upper surface of the steering bracket 24 are connected by the connecting member 53. May be. Accordingly, the electric outboard motor can be connected while taking advantage of the electric outboard motor 1 according to the embodiment described above, such as lowering the center of gravity of the electric outboard motor and preventing the outboard motor main body from protruding upward from the stern plate 6 of the hull 5. Further effects such as shortening of the connection length of the member 53 can be obtained.

  In this case, the shape of the drive shaft housing 52 is not limited to the shape protruding rearward as shown in FIG. 4, and the rear portion 54 is removed as shown by a two-dot chain line in FIG. It is good also as a compact shape.

1 is a cross-sectional view showing an electric outboard motor according to an embodiment of the present invention. 1 is a plan view showing an electric outboard motor according to an embodiment of the present invention. It is sectional drawing which shows another example of the electric outboard motor which concerns on embodiment of this invention. It is sectional drawing which shows another example of the electric outboard motor which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric outboard motor 2 Clamp bracket 3 Swivel bracket 5 Hull 12 Control unit storage part 13 Electric motor 14 Control unit 17 Motor housing 18 Drive shaft housing 24 Steering bracket 32 Drive shaft 34 Connecting member 35 Grasping part 41 Battery storage part 51 Battery Storage part 53 Connecting member

Claims (5)

An electric outboard motor provided outside the hull and propelling the hull by driving an electric motor,
A clamp bracket fixed to the hull;
A swivel bracket provided to be tiltable in the vertical direction with respect to the clamp bracket;
A motor housing formed integrally with the swivel bracket below the swivel bracket and containing the electric motor;
A steering bracket provided at the top of the motor housing so as to be turnable to the left and right;
A drive shaft housing that is rotatably provided at a lower portion of the motor housing and houses a drive shaft coupled to a lower end of an output shaft of the electric motor;
A connecting member for connecting the steering bracket and the drive shaft housing;
The electric outboard motor is characterized in that the steering bracket and the drive shaft housing are provided with the same rotation axis . The electric outboard motor according to claim 1, wherein a grip portion is provided on the connecting member . Electric outboard motor according to claim 1 or 2 battery housing part for housing the battery for supplying electric power to the electric motor is provided in an upper portion of the steering bracket. The battery housing part for housing a battery for supplying electric power to the electric motor is provided behind the motor housing, the battery housing unit according to claim 1 or 2 are formed integrally with the drive shaft housing Electric outboard motor. Wherein the top surface of the swivel bracket, electric outboard motor according to the any one of claims 1 to 4 the control unit housing portion is found provided for accommodating a control unit for controlling the electric motor.

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