JP3053036B2 - Electrical component mounting structure for 4-cycle outboard motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric component mounting structure for a four-stroke outboard motor, and more particularly to an improvement in a structure for effectively utilizing a component installation space in an upper case of the outboard motor.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional electric component mounting structure in a two-cycle outboard motor. In this figure,
An engine 51 is mounted in an upper case 50 of the outboard motor.
An electrical component 55 such as a CDI unit is attached to the upper portion of the second component 2.

As other mounting structures, a structure in which electrical components are directly mounted on a side surface of an engine or a structure in which electrical components are mounted via a predetermined mounting plate is generally known.

[0004]

However, in the case of a four-stroke outboard motor, the size of the starting motor is increased, and an oil inlet and an oil level detector are required. Unlike a cycle outboard motor, there is an inconvenience that the mounting space for electrical components is significantly limited by the structure in which the carburetor is mounted on the side of the engine.

Further, since a cam pulley is present on the upper surface of the cylinder head of the four-cycle outboard motor, electric components such as a CDI unit cannot be arranged and mounted in a manner as shown in FIG. For this reason, a method such as mounting on the crankcase side is also conceivable.However, since lubricating oil flows with high heat in the crankcase, electric components that are weak to heat, such as electric components configured using a resin or cooling, There is a disadvantage that it is difficult to install and attach an electrical component such as a regulator that requires the above.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned disadvantages of the prior art, and in particular, enables the installation of electrical components that can effectively use the installation space of a cam pulley, and further effectively protects electrical components that are vulnerable to heat. It is an object of the present invention to provide an electrical component mounting structure for a four-cycle outboard motor, which is also expected to have high reliability.

[0007]

SUMMARY OF THE INVENTION The present invention provides a flywheel
And the cam pulleys are arranged substantially horizontally above the engine.
And a recoil star above the flywheel.
4 units equipped with a 4-cycle engine
Install specified electrical components around the engine of the outboard motor
In a structure surrounding the outer periphery of the cam pulley.
A wall and an upper surface surrounding the upper surface of the cam pulley,
The height of the upper surface portion is the maximum height of the recoil starter.
Cam pulley cover with the height of the surrounding wall regulated so as not to exceed
Is disposed above the cam pulley and the cam
Attach the electrical components to the lower surface of the upper surface of the pulley cover
Having a configuration characterized by the following .

A peripheral wall surrounding the outer periphery of the cam pulley;
Having an upper surface portion surrounding the upper surface of the cam pulley.
Place a pulley cover above the cam pulley and
The top of the recoil starter
A configuration to attach the electrical components within a range not exceeding the height
May be .

[0009]

[Action] against the cam pulley cover surrounding the cam pulley
Then, predetermined electrical components are attached by superimposing in the direction of extension of the rotation axis of the cam pulley . In other words, the cam pulley cover
Predetermined electrical components are attached to the lower or upper side of the upper part
As a result, even in a four-cycle outboard motor in which a cam pulley is present, a space existing in the cylinder head area, that is, in a direction in which the rotation axis of the cam pulley extends.
It is possible to effectively use the empty space that has been used. Ma
In addition, it is possible to protect electric components that are weak to heat by the cooling action of the wind generated by the rotation of the cam pulley .

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG .
I will explain.

FIG. 1 is a side view in which an engine 2 is mounted on a lower case 1 which constitutes a part of an upper case of an outboard motor, and FIG. FIG. In these figures,
The engine 2 includes a flywheel 4 and a recoil starter 5 provided on an upper part of a recoil base 3, and a starting motor 6 arranged on one side of the recoil base. And a cylinder head 8, a spark plug 9, and a cylinder head cover 10.

On the upper surface side of the cylinder head cover 10,
A cam pulley 11 is arranged, and a timing belt 12 is wound around the cam pulley 11.
A regulator 13 and a connector holder 14 are arranged between the cylinder head cover 10 and the starting motor 6.

A cam pulley cover 16 surrounding the cam pulley is provided on the outer peripheral side of the cam pulley 11, and a CDI unit 17 as an electrical component is accommodated inside the cam pulley cover 16. That is, as shown in FIG.
The flywheel 4 is located on the upper left side of the engine 2
And a cam pulley 11 is provided substantially on the right side in the horizontal direction.
And a recoil star above the flywheel 4.
Is provided over the cam pulley 11 and
Cam in the empty space created on the right side of recoil starter 5
This is a structure in which the pulley cover 16 is provided . As shown in FIGS. 3 and 4, the cam pulley cover 16
The overall shape has a shape substantially similar to the upper shape of the grand piano, includes a peripheral wall 19 that can surround the timing belt 12, and an upper flat portion 21 is formed via a step portion 20. As is clear from FIG. 1, the height of the peripheral wall 19 is
Effective use of empty space created on the right side of the recoil starter 5
For use, the height of the upper surface portion 21 is
It is regulated not to exceed the maximum height . A space 22 is formed below the upper flat surface 21 so that the CDI unit 17 can be accommodated in the space 22.
In addition, windows 19A and 19A are provided at four locations in the circumferential direction of the peripheral wall 19.
B, 19C and 19D are formed. These windows 19
A to 19D, windows 19A and 19B correspond to the CD
The window 19C is formed as a region through which a bolt 23 for fixing the I unit 17 passes, and the window 19C can lead out the lead wire 17A of the CDI unit 17 to the outside. The window 19D functions as an insertion port for the CDI unit 17.

In FIG. 2, reference numeral 24 indicates an ignition coil, and reference numeral 25 indicates a carburetor.

Therefore, according to the structure of the present invention, since the cam pulley cover 16 accommodates electrical components such as the CDI unit 17, the space around the cylinder head cover 10, more specifically , the cam pulley 11 Upward
In addition, an empty space generated on the right side of the recoil starter 5 can be effectively used, and the electric components can be attached even when the cam pulley 11 exists.

In addition, since the installation space of the cam pulley cover 16 can be increased by installing the cam pulley cover 16, the layout for installing other parts becomes relatively easy, which is extremely advantageous in design.

Further, a bracket for mounting electric components is not required, and it is expected that cost reduction can be achieved from this viewpoint.

Further, there is an effect that the wind from the cam pulley becomes a cooling wind and the heat generated from the electric components can be suppressed as much as possible. This is particularly effective when electric components such as regulators that require cooling are accommodated.

In the embodiment, the example in which the electrical components such as the CDI unit 17 are accommodated in the cam pulley cover 16 has been described. However, the present invention is not limited to this, and as shown in FIG. And the cam pulley cover 16
It is also possible to adopt a structure in which electrical components such as the regulator 13 are attached to the upper surface of the device. In short, the present invention provides the cam pulley cover 1 if the cam pulley cover 16 is provided.
Electrical components can be attached to the upper surface or the lower surface of 6, and the electrical components can be provided on either the upper surface or the lower surface, or the electrical components can be provided on both the upper surface and the lower surface. . However, the cam pulley cover shown in FIG.
16 and the cam pulley cover 16 of FIG.
As shown in FIG.
When installing electrical components on the top surface,
The height of the peripheral wall 19 is regulated lower than that of the recover 16,
The electrical components (rear) disposed on the upper surface side of the cam pulley cover 16
The maximum height of the regulator 13) is the maximum height of the recoil starter 5.
It is necessary not to exceed the height .

[0020]

As is evident from the foregoing description, the present invention is provided with a cam pulley cover surrounding the cam pulley, because has a configuration for attaching the electrical component on the upper surface or the lower surface of the cam pulley cover, the extension direction of the rotation axis of the cam pulley The resulting empty space
In other words, the empty space generated above the cam pulley is effectively used. In addition, the rotation of the cam pulley
The wind that winds directly or indirectly cools electrical components ,
There is an effect that it is possible to provide an unprecedented electrical component mounting structure for a four-cycle outboard motor, which is expected to effectively protect electrical components that are vulnerable to heat.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an electrical component mounting structure for a four-cycle outboard motor according to the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is an enlarged perspective view of a cam pulley cover in the embodiment.

FIG. 4 is a perspective view showing a state where a CDI unit is accommodated in a cam pulley cover.

FIG. 5 is a view similar to FIG. 4, showing a different example other than the embodiment.

FIG. 6 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower case which comprises an upper case 2 Engine 10 Cylinder head cover 11 Cam pulley 16 Cam pulley cover 17 CDI unit as an electrical component

Claims (2)

(57) [Claims] 1. A flywheel and a cam pulley are connected to an engine.
Above and above the flywheel.
4 size with recoil starter superposed above
Engine of a four-stroke outboard motor
In a structure in which a predetermined electrical component is attached to a periphery, a peripheral wall surrounding an outer periphery of the cam pulley and the cam pulley
And an upper surface portion surrounding the upper surface of the upper surface, wherein the height of the upper surface portion is
Perimeter wall so as not to exceed the maximum height of the recoil starter
Adjust the height of the cam pulley cover
And the upper surface of the cam pulley cover
Characterized in that the electrical component is attached to the lower surface side of the part
Electrical component mounting structure for 4-cycle outboard motor . 2. A flywheel and a cam pulley are connected to an engine.
Above and above the flywheel.
4 size with recoil starter superposed above
Engine of a four-stroke outboard motor
In a structure in which a predetermined electrical component is attached to a periphery, a peripheral wall surrounding an outer periphery of the cam pulley and the cam pulley
A cam pulley cover having an upper surface portion surrounding the upper surface of
The cam pulley is disposed above the cam pulley.
The maximum height of the recoil starter on the top side of the cover
Characterized in that the electrical components are attached within a range not exceeding
Electrical component mounting structure for a 4-cycle outboard motor .