JP2002211487A - Lock device for engine cover for outboard motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock device for an engine cover for an outboard motor without depending on resiliency of seal rubber for maintaining a locked state of the engine cover to an under cover. SOLUTION: For locking the engine cover 11 for covering an upper half part of an engine E to the under cover 10 for covering a lower half part of the engine E, this lock device R for an engine cover for an outboard motor to be provided close to junction parts of the under cover and the engine cover to each other comprises a striker pin 35 provided on either the under cover or the engine cover with its axial line extended in an engine cover attaching/ detaching direction, a latch plate 20 provided on the other of them to be engaged with the striker pin, and a spring means (compression coil spring 41) coaxially provided with the striker pin to apply resiliency between the under cover and the engine cover in such directions as to let them apart from each other. Reaction to engagement force operating between the striker pin and the latch plate is thus generated by the spring means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outboard motor engine cover locking device for fixing an engine cover to an undercover.

[0002]

2. Description of the Related Art Conventionally, in an outboard motor, an engine is fixed on an engine mount case provided inside a relatively shallow bottom undercover having an open upper surface, and the engine protrudes upward from the undercover. The upper half of
The engine is covered by covering the engine from above with a deep bowl-shaped engine cover whose lower surface is open.

In order to prevent water from entering from the joint surface between the under cover and the engine cover, a sealing rubber is sandwiched between the opening surfaces of the under cover and the engine cover, and the joined state of the two is maintained. Locking device is provided near the joint between the two.

In this locking device, a hook member fixed to one of the under cover and the engine cover is engaged with a rotatable latch provided on the other to lock the mounted state of the engine cover. Such a configuration is known (for example, Japanese Utility Model Application Laid-Open No. 59-5440).
0 and JP-A-2-60894.

[0005]

However, in these conventional devices, the elastic force of the seal rubber is used to prevent rattling of the engine cover in the locked state. Therefore, when the seal rubber deteriorates over time, not only does the seal fail, but also the tightening of the engine cover is loosened.

The present invention has been devised to solve such problems of the prior art, and its main purpose is to maintain the elasticity of the seal rubber to maintain the locked state of the engine cover with respect to the undercover. An object of the present invention is to provide an outboard motor engine cover locking device improved so as not to depend on the force of the outboard motor.

[0007]

In order to achieve the above object, according to the present invention, the engine cover 11 covering the upper half of the engine E is fixed to the under cover 10 covering the lower half of the engine E. In order to attach the outboard motor engine cover locking device R, which is provided in the vicinity of the joint between the under cover and the engine cover, the outboard engine cover is attached to one of the under cover and the engine cover in the attaching / detaching direction of the engine cover. A striker pin 35 provided to extend the axis, a latch plate 20 provided on the other side so as to be able to engage with the striker pin 35, and a direction in which these are separated from each other between the under cover and the engine cover. It is characterized by having spring means (compression coil spring 41) provided coaxially with the striker pin to exert an elastic force. It was assumed to be.

In this case, the spring means generates a reaction force against the engaging force acting between the striker pin and the latch plate. Further, since the resilient force of the spring acts in a direction to separate the engine cover from the under cover, the pressing force applied to the seal rubber 12 is stabilized.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a side view showing an entire outboard motor to which the present invention is applied. The outboard motor 1 is fixed to a stern plate P of a hull via a stern bracket 2.

A swivel case 4 is connected to the stern bracket 2 so as to be rotatable about a horizontal tilt shaft 3. At the upper end of the swivel case 4, the front end of the engine mount case 5 is located, and at the lower end,
The extension cases 6 accommodating the drive shafts are connected so as to be rotatable around a swivel shaft 7 in the vertical direction.

At the upper end of the extension case 6,
An engine mount case 5 is connected, and a gear case 9 supporting a propeller 8 is connected to a lower end of the extension case 6. The engine mount case 5 is covered with an under cover 10, and the upper surface of the under cover 10 has a deep bowl shape whose lower surface is opened to cover mainly the upper half of the engine E mounted on the engine mount case 5. And a detachable engine cover 11 is attached.

[0013] In order to prevent water from entering from the joint surface between the under cover 10 and the engine cover 11, a seal rubber 12 is sandwiched between the opening surfaces of the under cover 10 and the engine cover 11, and the seal rubber 12 is interposed therebetween. A lock device (to be described later) provided in the vicinity of the joint maintains the joined state of the two.

FIG. 2 is a top view of the engine cover mounting surface of the outboard motor 1 according to the present invention, and FIG. 3 is a left side view thereof. Hereinafter, the front, rear, left, and right directions will be described with the lower side of FIG. In FIGS. 2 and 3, six boss portions 13 provided on the outer peripheral portion on the rear half side of the engine mount case 5 die-cast with an aluminum alloy material or the like are also die-cast with an aluminum alloy material or the like. Lower ends 14ab of six stays 14a to 14f
To 14fb are fixed using bolts B, respectively. And each upper end 14 of these stays 14a to 14f
At at 14ft, under cover support rail 15a
To 15c are fixed.

Undercover support rails 15a to 15c
Are divided into a plurality of portions, and the side portions 15a and 15c located on both left and right sides of the engine cover mounting surface.
Are a pair of side stays 14a, 14b / 14e, 14f fixed to both sides of the engine mount case 5.
Side stays 14a, 14b, 14e, 1 with upper ends 14at, 14bt, 14et, 14ft connected to each other
The arch-shaped portion 15b formed integrally with the base plate 4f and located on the rear side is formed by press-molding a metal plate, and has upper ends 14ct. At 14 dt, a portion located forward is fixed to the front bracket 16 which is molded separately from the engine mount case 5 and is fixed to the front end of the engine mount case 5 using the bolt B. Have been. The left and right side undercover support rails 15a and 15c are strong enough to support their own weight when the outboard motor 1 is turned over.

These undercover support rails 15a
The under cover 10 for connecting the upper opening surface to the upper opening surface 15c is made of a synthetic resin material, and covers the periphery from the lower half of the engine E to the connection portion of the extension case 6 with the engine mount case 5. ing.

As a part of a lock device R for fixing the engine cover 11 made of a synthetic resin material to the upper opening surface of the under cover 10, the inner periphery of the upper opening surface of the under cover 10 A pair of side stays 14
a, 14b / 14e, 14f, one for each of the side undercover support rails 15a, 15c, and two for the front bracket 16, a total of four latch mechanisms 1
7a to 17d are provided. As described above, by providing the latch mechanisms 17a to 17d, which are a part of the lock device R, on a member made of a metal material, the strength burden of the synthetic resin undercover 10 is reduced.

The arrangement of these four latch mechanisms 17a to 17d is similar to that of the left one 17d on the front bracket 16.
And the one on the left undercover support rail 15a 17
a is substantially equal to the distance between the right one 16c on the front bracket 16 and the one 16b on the right undercover support rail 15c.
The intervals between the objects 17a and 17b on the undercover support rails 15a and 15c on both the left and right sides are substantially equal. In this way, by arranging the three lock positions at approximately equal intervals, the tightening force in the circumferential direction between the under cover 10 and the engine cover 11 is made uniform.

Of these four latch mechanisms 17a to 17d, those on the left and right sides 17a and 17b are provided on the respective side undercover support rails 15a and 15c, as shown in FIG. 4 and FIG. Vertical cylinder hole 18a ・ 1
8b and a position which does not interfere with the cylindrical holes 18a and 18b, and is rotatably supported in the vicinity of the side cylindrical holes 18a and 18b with a vertical shaft 19 so as to rotate on a horizontal plane. Latch plates 20a and 20b. 4 and 5 show the right side 17b.
Although only the left side 17a is symmetrical, the configuration itself is the same as the right side 17b.

The front two 17d and 17c are shown in FIG.
As shown in FIG. 7 and FIG.
6, holders 21d and 21c fixed with two bolts B on the upper surface, respectively;
c, left and right latch plates 20d and 20c rotatably supported by a vertical axis 22 on the left and right latch plates 2.
The link 24 is formed by stamping and forming a steel plate in a U-shape when viewed from above to connect the 0d and 20c. Thus, the two latch mechanisms 17d and 17
c is configured as one sub-assembly by being connected by a link 24 made of a rigid body.

Between the two fixing bolts B of each of the holders 21d and 21c, there are formed vertical cylindrical holes 18d and 18c. Each of the latch plates 20d and 20c rotates between a position where the latch plates 20d and 20c interfere with each other and a position where they do not interfere on a horizontal plane.
8c is rotatably supported in the vicinity.

The above-mentioned four latch plates 20
Each of a to 20d is elastically biased by a torsion coil spring 27 so as to maintain a position where it interferes with the corresponding cylindrical hole 18a to 18d unless an external force acts. Notches N are formed at positions corresponding to the center portions of the cylindrical holes 18a to 18d of the respective latch plates 20a to 20d.

A first Bowden cable 28a is connected to both ends of the right front latch plate 20c on the front bracket 16.
And a pin 30 with which a push rod described later abuts is provided with the vertical shaft 22 interposed therebetween.

At the front end of the front bracket 16, as shown in FIG. 8, a lock release lever 32 rotatably supported by a horizontal shaft 31 and a push rod 33 slidable in the front-rear direction. Is provided. The lock release lever 32 is configured such that the upper end thereof can contact the front end of the push rod 33. Lock release lever 32
Usually, the torsion coil spring 34 elastically urges the front end of the push rod 33 so that the upper end thereof does not come into contact with the front end of the push rod 33, that is, in a direction away from the front end of the push rod 33.

When the unlocking lever 32 is rotated about the horizontal shaft 31 by pulling its lower end toward the front, the upper end pushes the push rod 33 backward. As a result, the pin 30 hanging from the left end of the right front latch plate 20c is pushed backward, and the latch plate 20c is
Around the center. As a result, the left end of the latch plate 20c provided with the pin 30 moves rearward, and the right end moves forward. Then, the inner cable 29a of the first Bowden cable 28a connected thereto is pulled to the near side.

On the other hand, the rotation of the right front latch plate 20c is transmitted to the left front latch plate 20d via the link 24. As a result, the left and right latch plates 20d
20c will rotate equally. With this rotation,
Notch N aligned with the center of cylindrical holes 18d and 18c
Moves simultaneously to a position outside the cylindrical holes 18d and 18c.

The right front latch plate 20c is connected to the right rear latch mechanism 17b via a first Bowden cable 28a.
Is connected to the right rear latch plate 20b. The right rear latch plate 20b is connected to the second Bowden cable 2
8b, it is connected to the left rear latch plate 20a of the left rear latch mechanism 17a. First and second Bowden cables 2 connected between these three latch plates
8a and 28b, each end of each outer tube,
A part 16a of the front bracket 16, an intermediate portion of the right undercover support rail 15c, an upper end 14et of the rear side 14e of the right stay, and an upper end 14bt of the rear side 14b of the left stay are individually connected. Yes, first
The tension of the inner cables 29a and 29b of the second Bowden cables 28a and 28b can be adjusted independently. In this way, the interlocking error between the latch plates can be made extremely small. Also, as is well known, the Bowden cable allows the outer tube to flex relatively freely,
Each latch plate can be freely arranged.

As shown in FIG. 5 and FIG. 7, at the position corresponding to each cylinder hole on the inner surface of the engine cover 11,
Each is provided with a striker pin 35. These striker pins 35 are substantially L-shaped, and a vertical portion V is screwed to a horizontal portion H of a bracket 38 fixed to the inner surface of the peripheral wall of the engine cover 11 using bolts B. The axis is oriented vertically.

The damper bush 3 made of a cylindrical elastomer material having an outer diameter capable of being fitted relatively tightly into each of the cylindrical holes 18.
9 is slidably mounted on the shaft of each striker pin 35. An enlarged diameter portion 40 having a tapered shape is integrally formed at the tip of each striker pin 35. Between the lower surface of the horizontal portion H of the bracket 38 and the upper surface of the damper bush 39 in each striker pin mounting portion, a compression coil spring 41 for elastically biasing in a direction to increase the distance therebetween is contracted. ing.

When the engine cover 11 is put on the under cover 10 having the above-described structure, first, the corresponding striker pins 35 are inserted into the cylinder holes 18a to 18d provided on the under cover 10 side. To the engine E. Each cylinder hole 18a
When the engine cover 11 is further pushed down after the damper bush 39 is fitted to the
The striker pin 35 is lowered while pressing 1. When the enlarged portion 40 of the striker pin 35 reaches the notch N of each of the latch plates 20a to 20d, the enlarged portion 4 having a tapered shape is formed.
0 pushes away each latch plate 20a-20d. When the enlarged diameter portion 40 passes through the notch N, each of the latch plates 20a to 20-2
0d is returned to the original position, and each of the latch plates 20a to 20d is rotated.
The notch N of 20d is the enlarged diameter portion 40 of each striker pin 35.
, And is locked. At the same time, the seal rubber 12 provided at the opening edge of the engine cover 11 is in close contact with the outer peripheral flange portion 42 of the under cover 10, and the waterproofness in the engine room defined by the engine cover 11 and the under cover 10 is improved. Secured. Here, in the locked state, the compression coil spring 41 provided coaxially with the striker pin 35 constantly exerts a resilient force in a direction of separating the under cover 10 and the engine cover 11 from each other. 20a-20d
The reaction force against the engaging force acting between the seal rubber 12 and the striker pin 35 does not need to depend on the restoring force of the seal rubber 12.

When the lock release lever 32 is pulled forward, all the latch plates 20a to 20d connected by the link 24 and the Bowden cables 28a and 28b rotate in the release direction. Then, the notch N comes off from the enlarged diameter portion 40 of the striker pin 35, and the seal rubber 1 is actuated by the action of the compression coil spring 41 provided on the striker pin 35.
2, the engine cover 11 is lifted upward. Accordingly, each striker pin 35 is also displaced upward, and the notch N of each of the latch plates 20a to 20d is displaced.
The enlarged diameter part 40 moves to a position where it cannot be engaged. In this state, since all the lock devices R are in the released state, the engine cover 11 can be lifted while pulling out the damper bush 39 from each of the cylindrical holes 18a to 18d.

[0032]

As described above in detail, according to the present invention, in the locked state, the compression coil spring provided coaxially with the striker rod causes the under cover and the engine cover to be resiliently separated from each other. Since the force always acts, the reaction force against the engaging force acting between the striker rod and the latch plate does not need to depend on the restoring force of the seal rubber. Therefore, a great effect can be obtained in maintaining a good construction of the joint between the under cover and the engine cover for a long period of time. Further, since the resilient force of the spring means acts in a direction to separate the engine cover from the under cover, the press-contact force applied to the seal rubber is stabilized, which can contribute to the improvement of the durability of the seal rubber.

[Brief description of the drawings]

FIG. 1 is an external side view of an outboard motor to which the present invention is applied.

FIG. 2 is a schematic top view of an engine cover mounting surface.

FIG. 3 is a schematic left side view of a mounting portion of an under cover and an engine cover.

FIG. 4 is a top view of the rear latch mechanism.

FIG. 5 is a longitudinal sectional view of a rear latch mechanism.

FIG. 6 is a top view of the front latch mechanism.

FIG. 7 is a longitudinal sectional view of a front latch mechanism.

FIG. 8 is a longitudinal sectional view of a lock release mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outboard motor 10 Undercover 11 Engine cover 17 Latch mechanism 20 Latch plate 35 Striker rod 41 Compression coil spring

Claims (1)

[Claims] 1. An engine cover for covering an upper half of an engine with an under cover for covering a lower half of the engine, the engine cover being provided near a joint between the under cover and the engine cover. A lock device for an engine cover for an outboard motor, comprising: a striker pin provided on one of the undercover and the engine cover so as to extend an axis thereof in a mounting / removing direction of the engine cover; A latch plate provided on the other side so that they can be fitted together; and a spring means provided coaxially with the striker pin between the under cover and the engine cover so as to exert an elastic force in a direction of separating the under cover and the engine cover from each other. A lock device for an outboard engine engine cover, comprising: