JP3320564B2 - Mounting structure for outboard motor electrical components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for electrical components of an outboard motor.

[0002]

2. Description of the Related Art An example of a structure for mounting electrical components such as a rectifier (rectifier) and a regulator (voltage regulator) mounted on an outboard motor is disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 62-93116.

In the example of this publication, a box is attached to the side of the engine body via a boss, a recess is formed in the surface of the box on the engine side, and electrical components are stored and attached in the recess. I have.

[0004]

In such a conventional electrical component mounting structure, a box projects outside the engine, so that a space corresponding to the projecting portion of the box is required around the engine. There was a problem.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an engine block having a cylinder and a part of a cooling water jacket formed in the engine block. A concave portion provided in a separated block wall portion, a cover fixed to the engine block, which closes the concave portion and closes a cooling water jacket, a boss portion projecting from the cover, and the boss portion. It consists of a electrical component having cooling fins attached, to form a space S between the cover and the electrical component by the boss portion, so as to cool the electric component by the cooling fan provided on said electric component It is characterized by having done.

[0006]

The electric component is mounted on the cover via the boss portion using a cover for closing the concave portion constituting the cooling water jacket, so that there is no thing protruding to the side of the engine as in a conventional box body, and the compactness is achieved. It can be structured.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below when applied to an outboard motor. FIG. 1 is a cross-sectional view of a main part of the outboard motor. The outboard motor 1 includes a vertical multi-cylinder engine 3 mounted on a mount case 2 serving as an engine mounting member and connected by bolts. Extension case 4 bolted below, and vertical drive shaft 6 housed in extension case 4
And an outboard comprising a bevel gear set 7 also housed in a gear case 5 attached to the lower part of the extension case 4 and a cooling water supply pipe 8 and a water pump 9 also housed in the extension case 4 and the gear case 5 The outboard motor 1A includes an outboard motor mounting means 11 bolted to the outboard motor 1A.

The outboard motor mounting means 11 is a metal fitting for fixing the outboard motor 1 to the hull. The outboard motor mounting means 11 swings the outboard motor main body 1A right and left in a plan view around a swivel shaft 12 and a tilt shaft 13 as a center. The outboard motor main body 1A including the swivel shaft 12 can be flipped clockwise in the drawing.

Reference numeral 23 designates an engine room, which is an engine accommodating case surrounding the engine 3. The case 23 comprises an undercase 24 and an engine case 25. The undercase 24 has an open upper side.
Are open on the lower side, and these opening portions are connected via a seal member 26. The under case 24 covers the lower periphery of the engine 3, and the engine case 25 covers the middle to upper parts of the engine 3. 31 is a crankshaft, 32 is a piston, 33 is a connecting rod connecting the crankshaft 31 and the piston 32, 34 is a flywheel provided on the crankshaft 31, and 38 is a camshaft.

FIG. 2 shows a plan view of the engine 3, in which FIG.
Reference numeral 40 denotes an engine block (cylinder block). A cylinder 39 is formed in the engine block 40, and the piston 32 is inserted into the cylinder 39.
A crankcase 4 is provided at one end of the engine block 40.
1, a cylinder head 42 is mounted on the other end side, and a head cover 43 is mounted on the cylinder head 42.

Reference numeral 45 denotes a crankshaft pulley.
The camshaft 38 is connected to a camshaft pulley 47 provided on the camshaft 38 via a belt tensioner 47 at an intermediate portion of the timing belt 46. A cam 50 is formed on the cam shaft 38 as shown in FIG.
The one end of the rocker arm 52 holding the
Contact.

An intake silencer box 54 is disposed on the side of the engine block 40, and one end of an intake pipe 56 is attached to a carburetor 55 connected to the intake silencer box 54.
Is attached to the intake port of the engine 3. The side of the engine block 40 opposite to the intake silence box 54 has C
An electrical box 57 containing a DI board or the like is attached.

A protrusion 40a is formed on the side of the engine block 40, and the protrusion 40a
A return path 61 is provided, and the outward path 60 and the return path 61 of these cooling water paths are configured by attaching covers 65 to concave portions 63 and 64 formed in the convex portion 40a. Outgoing path 6 of the cooling water channel
0, the return path 61 is located around the exhaust passage 66.

FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2. As shown in FIG.
, And the periphery is fixed to the engine block 40 with bolts 68. In the drawing, 70 is a relief valve attached to the cover 65 with bolts 71, 72
Is a thermostat attached to the cover 65 with bolts 68 .

A boss 73 is formed on the cover 65 as shown in FIG. 2, and an electrical component 75 comprising a rectifier and a regulator is attached to the boss 73 via bolts 74 (see FIG. 3). . As shown in FIG. 3, the electrical component 75 has a vertical width substantially equal to the cover 65,
Further, a plurality of cooling fins 77 are formed on the upper surface and the lower surface, and these fins 77 are formed between the inner wall of the engine housing case 23 and the engine block as shown in FIG.
The air is cooled by facing the space between them, and the cooling performance and the strength are improved by the air cooling.

As described above, in this embodiment, the electrical component 75
Is attached to the engine block 40 by using the cover 65 of the cooling water passage.
Since the electric component 75 is attached via the above-mentioned structure, a box body is not necessary as in the related art, and there is no such thing as a box body that protrudes from the engine block 40, so that a compact structure can be achieved. In addition, since the electrical component 75 is attached to the cover 65 of the cooling water passage, the electrical component 75 does not reach a temperature higher than the cooling water, which is a preferable mounting structure for the electrical component 75.

Since the electrical component 75 is attached via the boss 73, the cover 65 and the electrical component 75 are mounted as shown in FIG.
A space S can be formed between the electric component 75 and the space S, and the cooling air can be effectively applied to the electrical component 75. Further, since the bolts 68 are arranged on the peripheral edge of the cover 65, the tightening and loosening of the bolts 68 (shown by 68a in FIG. 3) covered by the electrical component 75 among the bolts 68 are easily performed. Can do it. Further, in this embodiment, since the vertical width of the electrical component 75 is substantially equal to the width of the cover 65, the work of tightening and loosening the bolt 68a is also easy in this regard. Further, since it is substantially within the range of the width of the cover 65, there is no interference from the surroundings of the cylinder block other than the cover 65, for example, a starter motor or an electrical box.

[0018]

As described above, according to the present invention, a cover for closing the concave portion constituting the cooling water jacket is used, and the electrical components are attached to this cover via the boss portion. Therefore, there is no protruding part to the side of the engine, and the mounting structure of the electrical components of the outboard motor can be made compact.

[Brief description of the drawings]

FIG. 1 is a sectional side view of a main part of an outboard motor.

FIG. 2 is a plan view of an engine.

FIG. 3 is a view taken in the direction of arrow 3 in FIG.

FIG. 4 is a side view of the outboard motor with a cover attached.

[Explanation of symbols]

 40 ・ ・ ・ Engine block 63, 64 ・ ・ ・ Recess 65 ・ ・ ・ Cover 73 ・ ・ ・ Boss 75 ・ ・ ・ Electrical components

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F02B 77/00 F02B 67/00 B63H 20/00 F02F 1/10

Claims (2)

(57) [Claims] An engine block having a cylinder; a recess provided on a block wall portion of a cooling water jacket formed in the engine block, the wall being spaced apart from the cylinder in a radial direction; the closing, closes the cooling water jacket consists of a cover that is secured to the engine block, and a boss projecting from the said cover, the electrical equipment having the cooling fins attached to the boss portion, the to form a space S between the cover and the electrical component by the boss portion, said so as to cool the electric component by the cooling fan provided on the electrical component, the outboard motor of the electrical component, characterized in that Mounting structure. 2. The cover has a peripheral edge bolted to the engine block, the concave portion and the peripheral edge have a portion along one direction of the engine block, and the electric component is arranged in this direction. The mounting structure for an electrical component of an outboard motor according to claim 1, wherein the mounting structure has a shape along the outboard motor.