JP2801169B2 - Outboard motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an outboard motor extension.
Around the engine oil drain
Outboard with improved rigidity of drain work opening
It is about the machine.

[0002]

2. Description of the Related Art An engine and an oil pan of an outboard motor are covered with a cover, and a drive shaft for driving a propulsion device is extended below the cover, and the periphery of the drive shaft is covered with an extension case and a cover. . The drain hole of the oil pan is provided in the extension case below the engine cover,
The drain plug that closes the drain hole is removed to change the oil.

[0003]

An outboard motor equipped with an engine having such an oil pan generally has a shape which is constricted greatly forward just below the oil pan, bypassing a drain portion (around a drain hole). It has an extension case. Therefore, especially when the engine displacement is large and the horsepower is high, the extension case tends to have insufficient rigidity near the drain during steering of the outboard motor or against engine vibration. By increasing the plate thickness or providing various ribs, the weight increases and the configuration becomes complicated.

An object of the present invention is to improve the rigidity of the extension case in the vicinity of the drain portion with a light weight and simple structure.

[0005]

According to a first aspect of the present invention, there is provided an extension case, comprising:
A rear portion extending forward from the rear portion;
A large-diameter hole portion 19 for inserting the drain portion 6b of the lupine 6 is provided.
The upper wall 12a and the upper wall 12a
And a rear wall extending from the lower end of the front wall 12b.
A bottom wall 12c provided continuously so as to extend;
Of the front wall 12b and the left and right of the front wall 12b.
c and the left and right side walls 12d, 12d that are continuous
, Top wall 12a, front wall 12b, bottom wall 12c, and left and right
Opening of the outboard motor oil draining work on the side walls 12d, 12d
The rigidity of the case around the mouth is improved. The rigidity near the drain of the extension case can be improved with a lightweight and simple configuration.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an external side view of an outboard motor 1, which includes an engine cover 3 composed of an upper cover 4 and a lower cover 5, an extension case 7 continuously provided thereunder, and a gear case below the extension case 7. A propulsion device 9 is disposed at the rear of the gear case 8, a stern bracket 10 is provided on the entire upper intermediate portion of the outboard motor 1, and a handle 1 is provided on the upper portion thereof.
1 is provided. The engine 2 is mounted inside the upper part.

FIG. 2 is a longitudinal side view of the drain portion in a closed state according to the present invention, and FIG. 3 is a perspective view of the drain portion in a closed state according to the present invention. A recess 12 is formed at the rear of the upper portion of the extension case 7 so as to be opened rearward, and the bottom 6a of the oil pan 6 is disposed above the recess 12 so that the drain 6b faces the recess 12. The oil pan 6 may be hung on the lower surface of the engine, or may be formed integrally with the extension case as a part thereof.

The recess 12 is recessed to a predetermined depth in the front of the extension case 7 and is provided with a top wall 12a, a front wall 12b, a bottom wall 12c, and left and right side walls 12d in succession, and is partitioned from the inside of the extension case 7. An opening 12e is formed rearward. At the center of the front wall 12b in the recess 12, a thick and large-diameter support boss 13 is integrally formed to protrude rearward, and the boss 13 is formed with a screw hole 14 opening to the rear end face. Immediately below the stopper 13, a stopper piece 15 having a predetermined width is integrally provided from the front wall 12b so as to project rearward.

A drain portion 6b faces the bottom of the oil pan 6 on the upper wall 12a of the recess 12, and the drain portion 6b is thick and protrudes downward in a truncated conical shape. A drain hole 16 is formed, and the drain plug 16 is closed by screwing a drain plug 17 as shown in the drawing.

The drain plug 17 has a screw shaft portion 17a to be screwed into the screw hole and a head 17c with a flange 17b, and the flange 17b is sealed with a packing or washer 18 interposed therebetween, and the drain portion 6b is provided on the upper wall 12a. The drain portion 6b including the drain plug 17 protrudes below the upper wall 12a and faces the upper portion of the recess 12 through the large-diameter hole portion 19 via the sealing material 20.

The above recess 12 is covered with a drain cover 21. The drain cover 21 is provided with a base piece 21 a for closing the opening 12 e of the recess 12. The base piece 21 a is set so as to conform to the rear curved surface of the extension case 7, and the extension case 7 is closed when the cover 12 closes the recess 12. It is formed so as to form a sense of unity with the outer surface of the cover.

The drain cover 21 is provided on both sides of the base piece 21a with light pressure contact with both side walls 12d of the recess 12 or with a side piece 21b having a slight clearance, and the side piece 21b has a predetermined length inside the recess 12. It is formed so as to protrude and to be positioned on both sides of the above-described stopper piece 15 so that the edge 21c extends to the inner side thereof.

A lower piece 21d is connected to the lower end of the base piece 21a, and both lower ends of the lower piece 21d are integrally connected to the lower ends of the side pieces 21b. In the embodiment, the length is set smaller than the side piece 21b, and the lower piece 21d
Abuts on the recess bottom wall 12c.

At the center of the base piece 21a, a cylindrical mounting boss 22 is integrally formed so as to protrude inwardly of the recess 12, and the tip 22a of the mounting boss 22 is supported by the support boss of the recess front wall 12b. The drain cover 21 is in a closed state in a state where the drain cover 21 is in contact with the end surface of the portion 13, and the concave seat portion 2 having an enlarged diameter
2b is formed.

The mounting boss 22 of the drain cover 21
The screw 23a at the tip of the screw is screwed into the screw hole 14 of the support boss 13 from the outside, and the head 23b of the screw 23 is screwed into the seat 22b to fit the base piece 2 into the hole 22c.
1a without projecting to the surface, the drain cover 2
1 is detachably fixed to the boss 13 of the recess 12. The above is shown in FIG. 2 and FIG.

When the oil in the oil pan 6 is discharged in order to replace the engine oil, the screw 23 is first loosened to release the connection between the boss 22 of the drain cover 21 and the boss 13 of the recess 12. In this state, the drain cover 21
Is free, and the drain cover 21 is once removed, or the lower portion of the base piece 21a is pressed or the like, and the upper portion is tilted toward the front, so that approximately half of the side having the lower piece 21d of the drain cover 21 remains in the recess 12. The inclination of the lower piece 21d of the drain cover 21 is
Is regulated by abutting on the lower surface.

Since the base piece 21a and the side piece 21b are in light contact with the side walls 12d of the recess as described above, they are inclined to the lower half of the recess 12 as shown in FIG. It is locked by. As a result, the recess 12 is released, and the drain plug 17 is withdrawn and pulled out, whereby the drain hole 16 is released, and the oil in the oil pan 6 is discharged from the drain hole 16. The oil flows down from the drain hole 16 into the recess 12, and the flowing oil flows down above the lower half of the drain cover 21, which is inclined right below.

The drain cover 21 has a base piece 21a having a concave portion 12a.
The upper half protrudes outward from the opening 12e of the base case 21 and is curved so as to coincide with the rear surface of the extension case 7, so that the oil flowing down onto the drain cover 21 flows upwardly into the base piece 21a. Flows on the back side,
It flows down from the tip of the curved upper half, and a container (not shown) faces downward and the flowing oil is stored in the container. Since the upper half of the drain cover 21 projects rearward, the rear surface of the extension case 7 And the falling oil can be reliably contained and recovered without being scattered around.

The drain cover 21 has side pieces 21b erected on both sides of the base piece 21a. Therefore, the drain cover 21 has a concave shape as shown in FIG. 5 and serves as a gutter for an oil guide, preventing oil from leaking to both sides. Since the lower piece 21d is upright, it does not scatter and flow to the back, flows down the drain cover 21 and flows out of the recess 12, so that no oil leaks into the recess 12 and the extension case 7 It does not adhere to the rear surface. This is shown in FIGS. 4 and 5 and FIG.
Then, it is shown as a perspective view.

After the oil is drained, the drain plug 17 is screwed into the drain hole 16, the drain cover 21 is raised, and the screw 23
To fix the cover 21 to the extension case 7 side.

[0021]

According to the present invention, the following effects are exhibited by the above configuration. The invention according to claim 1 is an extension case.
7 at the rear, extending forward from the rear,
A large-diameter hole portion 19 into which the drain portion 6b of the oil pan 6 is inserted is inserted.
The upper wall 12a provided is provided continuously with the upper wall 12a,
A front wall 12b extending downward, and a rear end extending from a lower end of the front wall 12b.
A bottom wall 12c provided continuously so as to extend toward an upper wall 1
2a, continuous with the left and right of front wall 12b, bottom wall
Left and right side walls 12d, 12d continuous with the left and right of 12c
The upper wall 12a, the front wall 12b, the bottom wall 12c, and the left
Drain work of outboard motor oil on right side walls 12d, 12d
To improve the rigidity of the case around the opening
Then, it opens near the drain part 6 of the extension case 7
The rigidity in the vicinity of the drain portion of the extension case can be improved by a lightweight and simple configuration while providing the portion .

[Brief description of the drawings]

FIG. 1 is a side view of an outboard motor according to the present invention.

FIG. 2 is a vertical side view of the drain portion in a closed state according to the present invention.

FIG. 3 is a perspective view of a drain portion closed state according to the present invention.

FIG. 4 is a vertical sectional side view of the drain portion according to the present invention in an open state.

FIG. 5 is a rear view of the drain portion in an open state according to the present invention.

FIG. 6 is a perspective view of a drain portion opened state according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outboard motor, 6 ... Oil pan, 6b ... Drain part, 7 ... Extension case, 12 ... Recess, 12a ... Upper wall, 1
2b: front wall, 12c: bottom wall, 12d: side wall, 12e: opening, 16: drain hole, 17: drain plug, 21: drain cover.

Continuation of the front page (56) References JP-A-58-43896 (JP, A) JP-A-63-97493 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F01M 11 / 04 B63H 20/00

Claims (1)

(57) [Claims] (1) At the rear of the extension case (7 ) ,
The oil pan 6 is provided so as to extend forward from the rear.
Upper wall 12 provided with large-diameter hole 19 into which drain 6b is inserted.
a and a front wall which is provided continuously with the upper wall 12a and extends downward.
12b and extends rearward from the lower end of the front wall 12b.
A bottom wall 12c provided Te, left and right continuously of the upper wall 12a, a right and left front wall 12b communicating
The left and right side walls 12d, which are continuous with the left and right sides of the bottom wall 12c,
12d, the upper wall 12a, the front wall 12b, the bottom wall 12c, and the left and right
Opening of the outboard motor oil draining work on the side walls 12d, 12d
To improve the rigidity of the case around the mouth.
Outboard motor characterized.