JP2000318686A - Cover structure of outboard motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the intrusion of a foreign matter into a recoil cover by fixing a cover member to an engine through a brace, forming a protector on the brace, and blocking the clearance formed between the engine and the cover member with the protector. SOLUTION: A stator 22 constituting a flywheel magnet device 17 is directly bolted to a cylinder block 15 and the upper surface of a crankcase 16. A recoil cover is bolted to the cylinder block 15 and the crankcase 16. A brace 27 has a boss 28 at the apex. The boss 28 of the brace 27 is fixed to the crankcase 16, and the recoil cover is mounted on the boss. According to this, intrusion of a foreign matter into a cover member can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outboard motor cover structure.

[0002]

2. Description of the Related Art An outboard motor engine is provided with a starting device. There are two types of starting devices: an electric type using a battery-driven starter motor, and a manual type using a recoil starter device. Usually, one or both types of starting devices are provided.

The recoil starter device is connected to an upper end of a crankshaft together with, for example, a flywheel magneto device, and the upper portion is covered with a recoil cover. The recoil cover is attached directly or via a brace or the like to a boss provided on the crankcase or cylinder block of the engine.

[0004]

In recent years, the outer diameter of the recoil has been increased in order to improve the startability of the engine and to reduce the operation load of the recoil.

[0005] However, when the outer diameter of the recoil increases, the recoil cover also increases in size, and a part of the recoil cover protrudes from the engine. When a part of the recoil cover protrudes from the engine, foreign matter easily enters the recoil cover from a gap below the recoil cover, and this foreign matter is not preferable for the rotating flywheel magneto device.

The present invention has been made in view of the above circumstances, and has as its object to provide a cover structure for an outboard motor in which foreign matter is prevented from entering the recoil cover.

[0007]

According to the present invention, there is provided a cover structure for an outboard motor according to the present invention.
As described in the above, in an outboard motor in which equipment disposed above the engine is covered with a cover member, the cover member is fixed to the engine via a brace, and a protector is formed on the brace. A gap formed between the engine and the cover member is closed.

In order to solve the above-mentioned problem, the brace is for fixing a recoil cover for covering a recoil starter device disposed above the engine to the engine. The protector has a wing shape projecting to the side of the brace.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a left side view of an outboard motor to which the present invention is applied. As shown in FIG. 1, the outboard motor 1 includes an engine holder 2, and an engine 3 is installed above the engine holder 2. The engine 3 is a vertical engine in which a crankshaft 4 is disposed substantially vertically. An oil pan 5 is disposed below the engine holder 2, and a bracket 6 is attached to the engine holder 2, for example, and the outboard motor 1 is mounted on a transom of a hull (not shown) via the bracket 6. .

The engine 3, the engine holder 2 and the oil pan 5 of the outboard motor 1 are covered with an engine cover 7. The engine cover 7 includes the engine 3
A lower cover 7a covering the lower portion, the engine holder 2 and the periphery of the oil pan 5, and an upper cover 7b covering the upper portion of the engine 3 are vertically divided into two parts.

A shaft housing 8 is provided below the oil pan 5. A drive shaft 9 is disposed substantially vertically in the engine holder 2, the oil pan 5 and the shaft housing 8, and an upper end thereof is connected to a lower end of the crankshaft 4. The drive shaft 9 extends downward in the shaft housing 8, and extends through a bevel gear 11 and a propeller shaft 12 in a gear case 10 provided at a lower portion of the shaft housing 8.
Is configured to be driven.

FIG. 2 shows the engine 3 of the outboard motor 1 shown in FIG.
It is an enlarged side view of a part, and shows only the engine cover 7 in cross section. FIG. 3 is a plan view of the engine 3.
As shown in FIG. 1, FIG. 2 and FIG. 3, an engine 3 mounted on the outboard motor 1 is a water-cooled four-cycle three-cylinder configured by combining, for example, a cylinder head 14, a cylinder block 15, a crankcase 16, and the like. Engine.

A cylinder block 15 is disposed at the forefront of the engine 3, that is, behind (to the right of) the crankcase 16 disposed at the leftmost position in FIGS. 1 and 2. The cylinder head 1 is located behind the cylinder block 15.
4 are arranged.

The upper end of the crankshaft 4 protrudes above the engine 3, and a flywheel magneto device 17 and a recoil starter device 18 are provided at the upper end.
These devices 17 and 18 are covered from above by a recoil cover 19 which is a cover member.

A starter motor 2 is provided on the left side of the engine 3.
0a, an electrical component box 20b, and an electrical component 20 such as an ignition device 20c. The carburetor 21a, the intake pipe 21b, the silencer 2
An intake system component 21 such as 1c is arranged. The electrical component 20 and the intake component 21 are disposed above the split surface 7c of the engine cover 7 in order to improve maintainability.

FIG. 4 is a plan view of the engine 3 with the recoil cover 19 removed. As shown in FIG.
Stator 2 constituting flywheel magneto device 17
2 is directly fixed to the upper surfaces of the cylinder block 15 and the crankcase 16 with, for example, bolts 23. FIG.
As shown in FIG. 4, the recoil cover 19 has, for example, one front portion and two rear portions fixed to the cylinder block 15 and the crankcase 16 with bolts 24 or the like. Specifically, one portion of the rear part of the recoil cover 19 is fixed to a boss 25 provided on the cylinder block 15. The other part of the rear part and one part of the front part are fixed to the cylinder block 15 and the crankcase 16 via braces 26 and 27, respectively.

FIG. 5 shows a brace 2 of the braces 26 and 27 used for fixing the recoil cover 19 to the front portion.
7 is an enlarged plan view of FIG. FIG. 6 shows VI-VI of FIG.
FIG. 7 is a sectional view taken along line VII-VII of FIG. 5.

As shown in FIG. 5 to FIG.
7 has, for example, a substantially isosceles triangular shape, and each vertex has a boss 2
8, 28 and 29 are provided. The two bosses 28 on the short side of the brace 27 are fixed to the crankcase 16, and the recoil cover 19 is attached to the other bosses 29. Further, wing-shaped protectors 30 projecting laterally are formed on a pair of long sides of the brace 27 facing each other.

Next, the operation of the present embodiment will be described.

In the outboard motor 1 of the present embodiment, the outer diameter of the recoil starter device 18 is increased in order to improve the startability of the engine 3 and to reduce the operation load of the recoil starter device 18. As a result, the recoil cover 19 also becomes large, and a part thereof protrudes from the engine 3 and foreign substances easily enter the recoil cover 19 from a gap below the recoil cover 19.

In the present invention, the electrical system component 20 is provided on the left side of the engine 3 and the intake system component 2 is provided on the right side of the engine 3.
1 and the electric system component 20 and the intake system component 21 are arranged above the split surface 7c of the engine cover 7, so that the gap on the lower surface of the recoil cover 19 is closed on both sides of the engine 3, Foreign matter is prevented from entering. Further, there is no particular problem behind the engine 3 because the lower surface of the recoil cover 19 is on the cylinder block 15.

On the other hand, in front of the engine 3, it is necessary to secure a space for the routing of electric system wiring such as a fuel pipe (not shown) and a battery cable (not shown) from outside the outboard motor 1. A gap is formed on the lower surface of the recoil cover 19 on the front side of the engine 3, and there is a possibility that foreign matter may enter the recoil cover 19 from this gap.

Therefore, as described above, the brace 2 for fixing the front portion of the recoil cover 19 to the crankcase 16 is used.
If the wing-shaped protectors 30 projecting laterally from each other are formed in the recoil cover 19, the gaps are closed, and no foreign matter enters the recoil cover 19.

In the above-described embodiment, an example is shown in which the present invention is applied to the recoil cover 19 which covers the recoil starter device 18 as a cover member. However, for example, the starter motor 2 is not provided with the recoil starter device 18.
In the case of a model equipped with only the flywheel 0a, only the flywheel magneto device 17 is disposed at the upper end of the crankshaft 4, and the flywheel cover (not shown) covers the flywheel magneto device 17, It goes without saying that the present invention can be applied to this flywheel cover by using the cover as a cover member.

Further, depending on the model, a timing belt (not shown) is disposed on the upper surface of the engine 3 and the timing belt is covered with a belt cover (not shown). It goes without saying that the invention can be applied to this belt cover.

On the other hand, in the above embodiment, the stator 22 of the flywheel magneto device 17 is directly connected to the engine 3.
Although the example in which the stator 22 is fixed is shown, for example, when the stator 22 is fixed to the engine 3 via a bracket (not shown) or the like, a protector (not shown) may be provided on the bracket.

[0028]

As described above, according to the outboard motor cover structure of the present invention, in an outboard motor in which equipment disposed above the engine is covered by the cover member, the cover member is attached to the engine. While fixing via brace,
A protector is formed on the brace, and the protector closes a gap formed between the engine and the cover member, thereby preventing foreign matter from entering the cover member.

Further, the brace is for fixing a recoil cover covering the recoil starter device arranged above the engine to the engine, and the protector has a wing shape projecting to the side of the brace. Intrusion of foreign matter into the recoil cover is prevented.

[Brief description of the drawings]

FIG. 1 is a left side view of an outboard motor showing an embodiment of a cover structure for an outboard motor according to the present invention.

FIG. 2 is an enlarged side view of an engine portion of the outboard motor shown in FIG.

FIG. 3 is a plan view of the engine shown in FIG. 2;

FIG. 4 is a plan view of the engine with a recoil cover removed.

FIG. 5 is an enlarged plan view of a brace used for fixing a front portion of the recoil cover.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outboard motor 3 Engine 4 Crankshaft 14 Cylinder head 15 Cylinder block 16 Crankcase 17 Flywheel magneto device 18 Recoil starter device 19 Recoil cover (cover member) 26 Rear fixing brace 27 Front fixing brace 30 Protector

Claims (2)

[Claims] 1. An outboard motor in which equipment disposed above an engine is covered by a cover member, wherein the cover member is fixed to the engine 3 via a brace 27, and a protector 30 is formed on the brace 27; A cover structure for an outboard motor, wherein a gap formed between the engine 3 and the cover member is closed by the protector 30. 2. The brace 27 fixes a recoil cover 19 that covers a recoil starter device 18 disposed above the engine 3 to the engine 3.
2. The outboard motor cover structure according to claim 1, wherein the protector has a wing shape protruding to the side of the brace 27. 3.