JP2001039390A - Split engine cover structure for outboard engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the attaching and detaching workability while preventing fall of a screw member in case of attaching and detaching an engine cover. SOLUTION: One cover member (for example, 11R) is formed with a cylindrical hole type screw through hole 20, and the other cover member (for example, 11L) is provided with a nut member 22, and both the cover members (11R, 11L) are made to coincide with each other, and a screw member 14 is inserted from the screw through hole 20 side and fastened to the nut member 22 so as to unify both the cover members (11R, 11L). A passing block 24 and a diameter shrunken block 25 are formed in the inner diameter part of the screw through hole 20, and while the screw member 14 is formed with a screw part 26 on the tip side thereof, and formed with a passing part 27 on the head side thereof. In the case where the inner diameter of the passing block 24 is expressed with D1, the inner diameter of the diameter shrunken block 25 is expressed with D2, the outer diameter of the screw part 26 is expressed with d1, and the outer diameter of the passing part 27 is expressed with d2, they are set so as to satisfy the condition that D1>d1>D2>d2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Most of the engine covers of outboard motors have a structure in which a plurality of cover members are combined and fastened with screw members. FIG. 10 shows an example of a general structure of a fastening portion using a screw member. As shown here, one cover member a is formed with a screw hole b having a cylindrical hole shape, and the other cover member c is embedded with a nut member d.
The screw member e inserted from the screw insertion hole b side by combining the two cover members a and c is a nut member d.
, The two cover members a and c are combined.

On the other hand, various kinds of cables such as a throttle cable, a shift cable, and an electrical cable are externally inserted into the engine cover of the outboard motor. FIGS. 11 and 12 show examples of the structure of such cables in the insertion portion. As shown here, a cylindrical rigging port i extending forward is formed at the joint of one cover member g and the other cover member h, and an elastic end of rubber or the like is formed at the front end opening of the rigging port i. A cable holding member j made of a material is mounted, and the throttle cable k and the shift cable l are inserted into the cable holding member j. Further, for example, a grommet m made of an elastic material such as rubber is fitted to the cover member h, and various electrical cables n, o, p and the like are inserted through this.

[0004]

However, the above-described engine cover structure has the following problems.

[0005] First, in the fastening structure shown in FIG. 10, which is larger than the outer diameter d ₁ of the screw member e inner diameter D of the screw insertion hole b formed in the cover member a is over the entire length, the cover member a, The screw member e may fall out of the screw insertion hole b during the attaching / detaching operation of c, and the screw member e is easily lost particularly when working on water. For this reason, it is necessary to store the screw member e in another place, and the workability of attaching and detaching the cover members a and c is very poor.

In the cable insertion structure shown in FIGS. 11 and 12, the cable holding member j is mounted on the front end opening of the rigging port i formed in the cover members g and h. The engine must be formed in a shape protruding forward, and the appearance of the engine cover deteriorates. In addition, since the cable holding member j needs to be elastically deformed and attached to the rigging port i, the detachability is not good. Note that similar difficulty is involved in fitting the grommet m.

The split engine cover structure for an outboard motor according to the present invention has been made in order to solve the above problems, and a first object of the present invention is to remove a screw member when the engine cover is attached or detached. The second object is to improve the appearance of the cable insertion portion of the engine cover and to improve the workability of attaching and detaching cables.

[0008]

In order to achieve the first object, the split engine cover structure for an outboard motor according to the present invention has one of the following features. A cylindrical member-shaped screw insertion hole is formed in the cover member, a nut member is provided in the other cover member, and both cover members are combined and the screw member inserted from the screw insertion hole side is fastened to the nut member. In the split type engine cover structure of the outboard motor in which both the cover members are combined with each other, an insertion section and a reduced diameter section are formed in the inner diameter portion of the screw insertion hole, and a screw portion is formed on the distal end side of the screw member. Forming an insertion portion on the head side, the inner diameter of the insertion section is D1, the inner diameter of the reduced diameter section is D2,
When the outer diameter of the screw portion is d1 and the outer diameter of the insertion portion is d2, D1>d1>D2> d2.

According to this structure, since the outer diameter d1 of the screw portion of the screw member is larger than the inner diameter D2 of the reduced diameter section of the screw insertion hole, the screw member falls out of the screw insertion hole even if the screw member is loosened. The workability of attaching and detaching the engine cover is improved.

Also, in order to achieve the first object, the split engine cover structure of the outboard motor according to the present invention, as described in claim 2 of the present invention, In the configuration, when the insertion section is provided on the side facing the other cover member with respect to the reduced diameter section, and the length of the insertion section is L1 and the length of the screw portion is L2, L1 ≧ L2. I made it.

According to this structure, the screw portion of the screw member in the loosened state is accommodated in the insertion section of the screw insertion hole and does not protrude from the joint surface between the cover members. The screw member can be attached and detached while maintaining the state, and the workability of attaching and detaching the engine cover is improved.

Further, in order to achieve the second object,
According to a third aspect of the present invention, there is provided a split type engine cover structure for an outboard motor, wherein one of the cover members is combined with the other cover member and joined together. In the engine cover structure, a substantially U-shaped notch shape is formed at the joining edge of the one cover member, and a projection shape that fits tightly into the notch shape is formed at the joining edge of the other cover member. And, a holding opening is formed between the deepest part of the notch shape and the tip of the projection shape, and a cable holding member made of an elastic material is fitted in the holding opening in a liquid-tight manner, Cables inserted from the outside to the inside of the engine cover are inserted and held.

With this configuration, it is not necessary to form a cylindrical rigging port extending forward at the joint between the cover members as in the related art, and the appearance is improved. In addition, since the cable holding member can be fitted into the holding opening without being elastically deformed, the operability of attaching and detaching the cables is improved.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a right side view showing an example of an outboard motor to which an embodiment of the present invention is applied. The right side of FIG. 1 is forward (hull side) and the left side is rear. FIG. 2 is a front view of the outboard motor as viewed from the direction of arrow II in FIG.

An engine 2 mounted on the uppermost portion of the outboard motor 1 is fixed vertically on an engine holder 3 so that a crankshaft (not shown) stands upright. The drive housing 5, the drive housing 5 and the gear housing 6 are fixed in order, and a screw propeller 7 is pivotally supported on the rear side of the gear housing 6.
A clamp bracket 8 provided in front of the engine holder 3, the oil pan 4, and the drive housing 5 is fixed to the stern of the hull.

The engine 2, the engine holder 3 and the oil pan 4 are covered with a synthetic resin engine cover 10 to protect them from water. The engine cover 10 includes a lower cover 11 fixed to the engine holder 3 and the oil pan 4 side, and an upper cover 12 detachably mounted thereon. Remove and perform.

As shown in FIG. 2, the lower cover 11 has a three-part structure including a right cover 11R located on the right side, a left cover 11L located on the left side, and a front cover 11F located on the front. is there. These covers 11R, 11L, 11F correspond to an example of the “cover member” described in the claims.

Light cover 11R and left cover 11L
Are a plurality of screw members 13 extending in the vehicle width direction (FIG. 1).
And the screw member 14
And is fastened and fixed to the front cover 11F. An opening 15 is formed between the three cover members 11R, 11L, 11F when viewed from the front, and a pair of left and right upper mounts 16 provided at the front of the engine holder 3 face forward from the opening 15. To the upper part of the clamp bracket 8.

FIG. 3 is an enlarged view of a part III in FIG.
FIG. 4 is an exploded cross-sectional view along the line IV-IV in FIG. 3. FIG.
As shown in FIG. 5, a plurality of cylindrical screw-shaped screw insertion holes 20 are formed at the front edges of the right cover 11R and the left cover 11L, and a seat surface 21 is formed at the outer end side. On the other hand, several metal nut members 22 are embedded in both side edges of the front cover 11F so as to match the positions of the screw insertion holes 20 of the right cover 11R and the left cover 11L.

The screw insertion hole 20 has a stepped hole shape, an insertion section 24 having an inner diameter D1 is formed on the side facing the front cover 11F, and a reduced section 25 having an inner diameter D2 is formed on the seat surface 21 side. > D2. On the other hand, the screw member 14 has a screw portion 26 having an outer diameter d1 on its tip side.
Is formed, and an insertion portion 27 having an outer diameter d2 is formed on the head side, so that d1> d2. Further, d1 is set smaller than D1 and larger than D2, and d2 is set smaller than D2. Therefore, D1>d1>
The relationship of D2> d2 holds. Further, the relationship between the length L1 of the insertion section 24 and the length L2 of the screw portion is set such that L1 ≧ L2.

Light cover 11R and left cover 1
1L is that the screw insertion hole 20 is the front cover 1
The screw member 14 is screwed into the screw insertion hole 20 from the reduced-diameter section 25 side (the seating surface 21 side) so as to match the position of the nut member 22 on the 1F, and as shown in FIG. By tightening the screw portion 26 of the screw member 14 to the nut member 22, the right cover 11R and the left cover 11L are integrally coupled to the front cover 11F. The screw member 14 is screwed until its head comes into contact with the seat surface 21.

As shown in FIG. 6, when the screw member 14 is loosened, the screw portion 26 of the screw member 14 is accommodated in the insertion section 24 of the screw insertion hole 20.
The outer diameter d1 of the screw portion 26 is equal to the inner diameter D of the reduced diameter section 25.
Since it is larger than 2, the screw portion 26 does not pass through the reduced diameter section 25, and the screw member 14 does not fall out of the screw insertion hole 20. For this reason, the right cover 11R and the left cover 11L are connected to the front cover 11R.
There is no fear of losing the screw member 14 when attaching or detaching the cover 11F, and the workability of attaching and detaching the covers 11R, 11L, 11F is extremely good.

Moreover, the screw portion 26 of the screw member 14
Is set to be equal to or less than the length L1 of the insertion section 24 of the screw insertion hole 20, the screw portion 26 of the screw member 14 in the loosened state is accommodated in the insertion section 24, and the light cover 11R and left cover 1
The screw portion 26 does not protrude from the 1L joint surface. For this reason, the right cover 11R and the left cover 11L
The screw member 14 can be attached and detached while maintaining the close contact state between the cover member 11F and the front cover 11F. In this regard, the workability for attaching and detaching the covers 11R, 11L, and 11F is also good.

As shown in a modification of FIG. 7, the positional relationship between the insertion section 24 of the screw insertion hole 20 and the reduced diameter section 25 may be reversed. Also in this case, since the screw member 14 in the loosened state does not fall out of the screw insertion hole 20, the workability of attaching and detaching the covers 11R, 11L, 11F can be improved. Further, the cross-sectional shape of the reduced diameter section 25 shown in FIGS.
For example, as shown in FIGS.
A plurality of protrusion shapes 28 to
It is also possible to adopt a cross-sectional shape provided with 30 or the like.

FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. As shown in FIG. 3, for example, a substantially U-shaped cutout shape 31 that cuts horizontally to the right is formed at a joint edge of the light cover 11R with the front cover 11F. On the other hand, a projection 32 having a shape that fits tightly with the notch 31 of the light cover 11R is formed at the joint edge of the front cover 11F with the light cover 11R.

When the notch 31 and the protrusion 32 are fitted, a circular holding opening 33 is formed between the deepest part of the notch 31 and the tip of the protrusion 32. Cable holding member 3 made of an elastic material such as rubber
4 are fitted in a liquid-tight manner. As shown in FIG. 9, for example, a flange-shaped fitting portion 3 formed on the inner peripheral edge of the holding opening 33.
5 is fitted into a waterproof groove 36 formed over the entire outer periphery of the cable holding member 34.

Then, cables such as a throttle cable 37, a shift cable 38, and electrical cables 39 and 40, which are inserted from the outside to the inside of the engine cover 10, are inserted and held in the cable holding member 34.

According to the above structure, the right cover 11R, the left cover 11L and the front cover 11
It is not necessary to form a cylindrical rigging port extending forward at the joint of F and not only the appearance of the engine cover 10 is improved, but also the cable holding member 34 is formed in the holding opening 33 without being elastically deformed. Since they are fitted, the workability of attaching and detaching the cables 37 to 40 is greatly improved.

[0029]

As described above, the split type engine cover structure for an outboard motor according to the present invention has a screw hole formed in one of the cover members and a nut member in the other cover member. Is provided, in a split engine cover structure of an outboard motor in which both cover members are combined and the screw member inserted from the screw insertion hole side is fastened to the nut member and both cover members are combined. While an insertion section and a reduced diameter section are formed in the inner diameter portion of the screw insertion hole, a screw section is formed on the distal end side of the screw member, and an insertion section is formed on the head side, and the inner diameter of the insertion section is D1, When the inner diameter of the diameter section is D2, the outer diameter of the screw portion is d1, and the outer diameter of the insertion portion is d2, D1
>D1>D2> d2, and according to this configuration, even if the screw member is loosened, the screw member does not fall out of the screw insertion hole,
The workability of attaching and detaching the engine cover can be improved.

Also, in the split engine cover structure for an outboard motor according to the present invention, the insertion section is provided on the side facing the other cover member with respect to the reduced diameter section, and the length of the insertion section is L1, When the length of the screw portion is L2, L1 ≧
Since the length L2 is set, the screw member can be detachably attached while maintaining the close contact between the cover members, so that the workability of attaching and detaching the engine cover can be further improved.

Further, according to the split engine cover structure for an outboard motor according to the present invention, in the split engine cover structure for an outboard motor in which one cover member is combined with the other cover member and joined together, A substantially U-shaped notch shape is formed at the joining edge of the cover member, while a projecting shape that closely fits into the notch shape is formed at the joining edge of the other cover member, and the deepest portion of the notch shape is formed. A holding opening is formed between the front end of the protrusion and a cable holding member made of an elastic material is fitted in the holding opening in a liquid-tight manner, and the cable holding member is inserted from the outside of the engine cover into the inside. According to this configuration, it is necessary to form a cylindrical rigging port extending forward at a joint portion of each cover member as in the related art. It improves the appearance of the engine cover eliminated, thereby improving the attachment and detachment of the cables to allow the fitting of the cable holding member in the holding opening without elastic deformation.

[Brief description of the drawings]

FIG. 1 is a right side view showing an example of an outboard motor to which an embodiment of the present invention has been applied.

FIG. 2 is a front view of the outboard motor as viewed from an arrow II in FIG. 1;

FIG. 3 is an enlarged view of a part III in FIG. 2;

FIG. 4 is an exploded cross-sectional view taken along the line IV-IV of FIG. 3, showing an embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a state where the screw member is tightened into the nut member.

FIG. 6 is a cross-sectional view showing a state where a screw member is loosened from a nut member.

FIG. 7 is a transverse sectional view showing a modification of the present invention.

FIGS. 8A to 8C are cross-sectional views showing examples of the cross-sectional shape of a reduced-diameter section.

FIG. 9 is a transverse sectional view taken along the line IX-IX of FIG. 3;

FIG. 10 is an exploded cross-sectional view of a cover member and a screw member showing a conventional technique.

FIG. 11 is a front view of a cable insertion portion showing a conventional technique.

FIG. 12 is a transverse sectional view taken along the line XII-XII in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outboard motor 10 Engine cover 11R Right cover which is an example of a cover member 11L Left cover which is an example of a cover member 11F Front cover which is an example of a cover member 14 Screw member 20 Screw insertion hole 22 Nut member 24 Insertion section 25 Diameter reduction Section 26 Screw part 27 Insertion part 31 Notch shape 32 Protrusion shape 33 Holding opening part 34 Cable holding member 37-40 Cables D1 Inner diameter of insertion section D2 Inner diameter of reduced diameter section d1 Outer diameter of screw part d2 Outer diameter of insertion part L1 Insertion section length L2 Thread length

Claims (3)

[Claims] A screw having a cylindrical hole formed in one cover member, a nut member provided in the other cover member, and a screw inserted from the screw insertion hole side when both cover members are combined. In an outboard motor split engine cover structure in which a member is fastened to the nut member and both cover members are joined, an insertion section 24 and a reduced diameter section 25 are formed in the inner diameter portion of the screw insertion hole 20, A screw portion 26 is formed on the distal end side of the screw member 14 and an insertion portion 27 is formed on the head side. The inside diameter of the insertion section 24 is D1, the inside diameter of the reduced diameter section 25 is D2, and the outside diameter of the screw section 26. Is d1, and the outer diameter of the insertion portion 27 is d.
2. A split engine cover structure for an outboard motor, wherein D1>d1>D2> d2 when 2. 2. When the insertion section 24 is provided on the side facing the other cover member with respect to the reduced diameter section 25, and the length of the insertion section 24 is L1 and the length of the screw portion is L2. 2. The split engine cover structure for an outboard motor according to claim 1, wherein L1 ≧ L2. 3. A split engine cover structure for an outboard motor in which one cover member and another cover member are joined together and combined, and a substantially U-shaped notch shape 31 is formed at a joint edge of the one cover member. On the other hand, a projection shape 32 that fits tightly into the notch shape on the joining edge of the other cover member while being formed.
And the deepest part of the notch 31 and the projection 3
A holding opening 33 is formed between the holding opening 33 and the front end of the engine cover 10, and a cable holding member 34 made of an elastic material is fitted in the holding opening 33 in a liquid-tight manner. Cables 37 to be inserted inside
40. A divided engine cover structure for an outboard motor, characterized in that the outboard motor 40 is inserted and held.