JPH0232196B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a top cowl fixing structure for an outboard motor.

[Prior Art] As shown in FIG. 1, an outboard motor has a clamp bracket 2 fixed to a stern plate 1 of a hull, and a swivel bracket 4 that is tilted around a horizontal axis via a tilt shaft 3 to the clamp bracket 2. The propulsion unit 5 is supported on the swivel bracket 4 via a steering shaft so as to be rotatable around a vertical axis. Further, an engine unit 6 is mounted on the upper part of the propulsion unit 5, and the propeller 7 can be rotated by the output of the engine unit 6. Further, a bottom cowl 8 is fixed to the upper part of the propulsion unit 5, and a top cowl 9 is fixed to the bottom cowl 8, and the bottom cowl 8 and the top cowl 9 form a housing space for the engine unit 6. The top cowl 9 is set above the tilt axis 3, and the lower case portion 5B of the propulsion unit 5 is set below the tilt axis 3.

Here, in the conventional outboard motor, the bottom cowl 8 and top cowl 9 are fixed by the following structure. In other words, as shown in FIG. The hook 9 is fixed to protrude toward the
As shown in FIG. Operation lever 1
0 and an engagement lever 8B rotatably supported via the shaft 10A.

In the case of the above-mentioned conventional top cowl fixing structure, the front fixing structure of the bottom cowl 8 and top cowl 9 does not use the engagement lever 8B as in the rear parts thereof, so that the entire fixing structure becomes lightweight.

[Problems to be Solved by the Invention] However, in the case of an outboard motor, the top cowl 9 is set above the tilt shaft 3, and the lower case portion 5B of the propulsion unit 5 is set below the tilt shaft 3. has been done. Therefore, if driftwood collides with the propulsion unit 5, the lower case portion 3B
rotates to the right in Figure 1, and the top cowl 9
The head with the bulge is forced to rotate rapidly to the left. At this time, the top cowl 9 tries to stay in place due to inertia.
Therefore, the top cowl 9 moves rearward in the propulsion direction relative to the bottom cowl 8 fixed to the propulsion unit 5, and as a result, the top cowl 9 moves backward in the propulsion direction.
The hook 9B is the engagement lever 8B of the bottom cowl 8.
As a result, the top cowl 9 will fall off from the bottom cowl 8.

SUMMARY OF THE INVENTION An object of the present invention is to reliably prevent a top cowl from falling off when driftwood collides with an outboard motor body.

[Means for Solving the Problems] The present invention includes a clamp bracket attached to a hull, a swivel bracket tiltably supported by the clamp bracket via a tilt axis, and a swivel bracket capable of being steered via a steering axis by the swivel bracket. A propulsion unit supported by In the top cowl fixing structure of an outboard motor, which is set below the tilt axis, the lower case part of the propulsion unit is attached to the engaging part formed on the front part of the bottom cowl.
The engaging portion formed on the front surface of the top cowl is engageable, and an engagement lever rotatably supported on the rear surface of the bottom cowl is attached to a hook fixed to the rear surface of the top cowl. The hook is configured to be engageable, and the hook includes an engaged portion with which the engagement lever engages from above, and a bent portion bent upward from the engaged portion in front of the engaged portion. This is what I did.

[Effect] According to the present invention, there are the following effects.

In other words, when a driftwood collision occurs, the lower case part of the propulsion unit suddenly jumps up, while the top cowl tries to stay in place due to inertia. Even when the top cowl is moved, the engaged portion and the bent portion of the hook of the top cowl move in the direction of biting into the engagement lever of the bottom cowl, thereby reliably preventing the top cowl from falling off.

[Embodiment] FIG. 4 is a sectional view of a main part showing a front fixing structure of a top cowl according to an embodiment of the present invention, and FIG. 5 is a sectional view of a main part showing a rear fixing structure of the same.

In the case of an outboard motor, as shown in Fig. 1, a clamp bracket 2 is attached to the stern plate 1 on the hull.
and a swivel bracket 4 tiltably supported by the clamp bracket 2 via a tilt shaft 3;
A propulsion unit 5 is rotatably supported by a swivel bracket 4 via a steering shaft. Then, when fixing the bottom cowl 11 to the upper part of the propulsion unit 5, and fixing the top cowl 13 to the bottom cowl 11, and forming the accommodation space for the engine unit 6 between the two cowls 11 and 13,
The top cowl 13 is set above the tilt axis 3, and the lower case portion 5B of the propulsion unit 5 is set below the tilt axis 3.

That is, as shown in FIG. 4, an engaging part 12 is integrated into the front surface of a bottom cowl 11 fixed to the upper part of the propulsion unit so as to protrude forward. In addition, the above bottom cowl 1
A hook 15 is fixed to the front surface of the top cowl 13, which together with the top cowl 13 can form an accommodation space for the engine unit, in such a manner that it projects rearward by means of a fitting 14. In addition, in the figure, 16 indicates a sealing member.

On the other hand, as shown in FIG.
A hook 18 shown in FIG. 6 is fixed to the rear surface of the housing by means of a fixture 17. The hook 18 is bent into a U-shape, with its bent end protruding rearward. Further, a shaft 20 is rotatably supported on the rear surface of the bottom cowl 11 via a bush 19. The shaft 20 has its central axis arranged in the front-rear direction, has an operating lever 21 fixed to its outwardly projecting end, and has an engaging lever 24 connected to its inwardly projecting end via a washer 22 and a bolt 23. The engagement lever 24 has its tip protruding forward. That is, the hook 18 is connected to the engagement lever 2.
4 is provided with an engaged portion 18A that is engaged from above, and a bent portion 18B that is bent upward from the engaged portion 18A in front of the engaged portion 18A in the direction of propulsion. And top cowl 1 on bottom cowl 11
3 is mounted, and by rotating the engagement lever 24 using the operation lever 21, the engagement lever 24 crosses the protruding end of the hook 18 and engages the engaged portion 1.
8A, so that the engagement lever 24 can be engaged with and detached from the hook 18. Note that the engagement lever 24 includes:
A stopper 24A is formed that comes into contact with a stopper receiving portion on the side of the bottom cowl 11 (not shown) and stops the engagement lever 24 in a non-engaged position with the hook 18. Further, in FIG. 5, 25 indicates a seal member interposed between the bottom cowl 11 and the top cowl 13, and 26 indicates a hole for filling with grease.

That is, in the top cowl fixing structure according to the above embodiment, the engaging portion 12 of the bottom cowl 11
With the hook 15 of the top cowl 13 engaged with the top cowl 13, the top cowl 13 is moved to the bottom cowl 11 using the engaging portion between the engaging portion 12 and the hook 15 as a fulcrum.
Rotate to the side and attach top cowl 13 to bottom cowl 1.
1, the engagement lever 24 of the bottom cowl 11 is rotated by the operating lever 21, and the engagement lever 24 is engaged with the hook 18 of the top cowl 13, thereby attaching the top cowl 13 to the bottom cowl 11. It becomes possible to fix.

According to the above embodiment, the front fixing structure of the bottom cowl 11 and top cowl 13 does not use the engagement lever 24 as in the rear part thereof, so that the entire fixing structure becomes lightweight. In addition, since the engagement lever 24 is supported on the bottom cowl 11 side, and therefore the shaft 20, the operating lever 21, etc. are held on the bottom cowl 11 side, the weight of the top cowl 13, which is the target of the attachment/detachment operation, is particularly reduced. It becomes possible to do this. Furthermore, when a driftwood collision occurs, the lower case portion 5B of the propulsion unit 5 suddenly jumps up while the top cowl 13 tries to stay in place due to inertia.
Even when the top cowl 13 moves backward in the propulsion direction relative to the bottom cowl 11 fixed to the bottom cowl 11, the engaged portion 18A and the bent portion 18B of the hook 18 of the top cowl 13 engage the engagement lever 24 of the bottom cowl 11. The top cowl 13 is reliably prevented from falling off.

FIG. 8 is a sectional view of a main part showing a modification of the rear fixing structure shown in FIG. 5 in the above embodiment. That is, in this modification, the top cowl 1
A hook 31 is fixed to the rear surface of 3 by a fixture 17. The hook 31 is bent in a U-shape, with its bent end protruding rearward, and the gap a between the protruding end and the inner surface of the top cowl 13 is smaller than the plate thickness E of the engagement lever 32 described below. Also,
An engagement lever 32 whose tip protrudes laterally is supported on the bottom cowl 11 by a bearing and operating structure similar to that of the engagement lever 24 in the previous embodiment. The hook 31 includes an engaged portion 31A that is engaged with the engagement lever 32 from above, and a bent portion 31B that is bent upward from the engaged portion 31A in front of the engaged portion 31A in the direction of propulsion.

That is, in the top cowl fixing structure according to the modification shown in FIG. engages with the engaged portion 31A from the side,
It becomes possible to engage and disengage the engagement lever 32 from the hook 31. Therefore, according to this modification, in addition to the effects of the above embodiment, when the hook 31 and the engagement lever 32 are engaged, the distal end engagement portion of the engagement lever 32 has a gap smaller than the plate thickness thereof. Since the top cowl 13 is disposed to be engaged with the engaged portion 31A having only the top cowl, it is possible to reliably maintain the engaged state of both when the top cowl 13 moves unexpectedly with respect to the bottom cowl 11.

In addition, the front fixing structure of the bottom cowl and top cowl according to the present invention is such that the engaging part formed on the front face of the top cowl is engaged with the engaging part formed on the front face of the bottom cowl. Therefore, the hook fixed to the front surface of the top cowl so as to protrude forward can be engaged with the hole-shaped engaging portion formed on the front surface of the bottom cowl. It may be something that does.

[Effects of the Invention] As described above, according to the present invention, it is possible to reliably prevent the top cowl from falling off when driftwood collides with the outboard motor body.

[Brief explanation of drawings]

Fig. 1 is a side view showing a general outboard motor, Fig. 2 is a sectional view of the main part showing the front fixing structure of a top cowl according to a conventional example, and Fig. 3 is a sectional view of the main part showing the rear fixing structure. FIG. 4 is a cross-sectional view of main parts showing a front fixing structure of a top cowl according to an embodiment of the present invention;
The figure is a cross-sectional view of the main part showing the rear fixing structure, and Figure 6 is a front view showing the hook in Figure 5 with the hook removed.
7 is a front view showing the engagement lever in FIG. 5 taken out, and FIG. 8 is a sectional view of a main part showing the rear fixing structure of the top cowl according to a modification of FIG. 5. 1... Stern plate, 2... Clamp bracket, 3
...Tilt axis, 4...Swivel bracket, 5...
...Propulsion unit, 5A...Lower case section, 6...
Engine unit, 11...Bottom cowl, 12
...Engaging portion, 13...Top cowl, 15...Hook, 18...Hook, 20...Shaft, 21...Operation lever, 24...Engagement lever, 31...Hook, 32...Engagement lever , 18A... engaged part,
18B...Bending part, 31A...Engaged part, 31B
...bending part.

Claims (1)

[Claims] 1 A clamp bracket attached to the hull,
A swivel bracket is tiltably supported by a clamp bracket via a tilt axis, and a propulsion unit is rotatably supported by a swivel bracket via a steering axis, and a bottom cowl is fixed to the upper part of the propulsion unit. When fixing the top cowl to the bottom cowl and forming a housing space for the engine unit between the two cowls, the top cowl is set above the tilt axis, and the lower case part of the propulsion unit is set below the tilt axis of the outboard motor. In the top cowl fixing structure, the engaging part formed on the front face of the top cowl can be engaged with the engaging part formed on the front face of the bottom cowl, and the engaging part formed on the front face of the top cowl is fixed to the rear face of the top cowl. An engagement lever rotatably supported on the rear surface of the bottom cowl can be engaged with the hook, and the hook has an engaged portion with which the engagement lever engages from above, and an engaged portion with which the engagement lever engages from above. What is claimed is: 1. A top cowl fixing structure for an outboard motor, comprising a bent portion bent upward from the engaged portion in front of the mating portion.