JPH08276896A - Steering device for outboard engine of small-sized ship - Google Patents

Abstract

PURPOSE: To extend the tip portions of the piston rods of the steering cylinders between two outboard engines to link them to the steering levers of the outboard engines and thus to steer without a hitch even if one of the outboard engines is tilted up in a small-sized ship having the two outboard engines mounted in parallel. CONSTITUTION: When both of outboard engines are in a tilted-down state and a hydraulic cylinder 20 is extended, a right steering arm 22 is moved to the left side and a right outboard engine 1 is steered in the direction of the arrow. A left outboard engine 1 is steered in the same direction by moving a left steering arm 23 to the left side. Next, when the left outboard engine 1 is tilted up, for example, the left steering arm 23 and a piston rod 21 are rotated around its axis but the right steering arm 22 is kept in the same state as before the left outboard engine 1 is tilted-up because it is rotatably connected to a joint A independently of the piston rod 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering apparatus for an outboard motor of a small boat in which an outboard motor provided so as to be tiltable and steerable is attached to, for example, the rear end of a hull.

[0002]

2. Description of the Related Art Conventionally, various types of outboard motors have been provided which are detachably mounted on the hull of a small boat. A small boat provided with such an outboard motor is generally referred to as a "motor boat", and can be steered by changing the direction of the outboard motor itself.

Further, in such a motor boat, the outboard motor can be flipped up and used so as not to be damaged by the propeller propeller of the outboard motor interfering with the shallow water. It is configured. Such a flip-up state is called "tilt up". Generally, the above-mentioned motor boat is constructed so that it can be steered even in this tilt-up state.

There is a model which is constructed so that this steering can be performed by remote control. In this model, the piston type hydraulic cylinder is fixed on the hull side,
Attach a steering arm to the tip of the piston rod protruding from the cylinder tube of this hydraulic cylinder,
The steering arm is connected to the steering lever of the outboard motor.

The steering wheel provided in the driver's seat is
It is connected to a hydraulic pressure generation circuit, and this hydraulic pressure generation circuit is connected to the cylinder tube of the hydraulic cylinder. Therefore, by operating this handle, the piston rod can be driven to project and retract from the cylinder tube of the hydraulic cylinder, and the outboard motor can be steered via the steering arm. There is.

Further, the cylinder tube of the hydraulic cylinder is fixed with the center line of the piston rod aligned with the tilt-up swing center line of the outboard motor so that steering can be performed even in the tilt-up state. Has been done.

With this structure, the tilt-up can be dealt with only by rotating the piston rod of the hydraulic cylinder around its axis.

On the other hand, conventionally, there is a model in which two outboard motors as described above are provided in parallel. In such a model, the two outboard motors are separately provided so that they can be tilted up, and the outboard motors can be steered simultaneously.

That is, in the conventional outboard motor, one of the outboard motors is configured to be steerable by the hydraulic cylinder as described above, and the other outboard motor is connected to the one outboard motor by a tie rod. There is. Therefore, when one of the outboard motors is caused to perform the steering operation, the other outboard motor is also similarly operated to perform the steering operation.

Both ends of the tie rod have steering levers for the respective outboard motors so that the steering operation can be performed even when only one of the two outboard motors is tilted up. Via a universal joint (a joint in which the angles of the two axes can be freely changed).

[0011]

By the way, the conventional steering mechanism for the outboard motor has the following problems to be solved.

Firstly, the presence of the tie rod causes the following problems.

That is, in the case of the motorboat having two outboard motors described above, when only one of the outboard motors is tilted up, the tie rods connecting the two outboard motors are connected to each other. There is a risk of interfering with the engine cover of the machine and other parts located around it. Therefore, smooth steering may not be possible.

Further, as the structure for connecting the tie rods, the universal joint must be used as described above, and the structure becomes complicated. Further, when tilting up, the shaft may be twisted, which may become a driving resistance.
For this purpose, it is necessary to provide a countermeasure against twisting, but this configuration also becomes complicated.

Furthermore, if only one of the outboard motors is tilted up while the two are still connected by the tie rods, the length of the tie rods does not change, and a deviation occurs in the steering direction of the two outboard motors. There is a thing.

Secondly, in the conventional construction, it is necessary to fix the hydraulic cylinder on the swing axis of the bracket. At this time, in order to fix the hydraulic cylinder, the cylinder tube body of the hydraulic cylinder is screwed into the bracket. This causes the following problems.

That is, in such a structure, since it is necessary to rotate the cylinder tube when the cylinder tube is removed from the bracket, the two hydraulic pressures connected to the cylinder tube are required. It is sometimes necessary to remove the tube from this cylinder tube.

When assembling this hydraulic cylinder, contrary to the above, after rotating the cylinder tube and fixing it to the fixing tool, the hydraulic tube is attached to the cylinder tube. I need to wear it.

Such work is very troublesome. In addition, oil may flow out when the hydraulic tube is removed, and it is necessary to bleed air after mounting the hydraulic tube.

The present invention has been made in view of the above circumstances, and when steering two outboard motors that can be individually tilted up, the structure is simple and there is no mechanical difficulty, and It is an object of the present invention to provide an outboard motor steering device that can be easily assembled and disassembled.

[0021]

In order to solve the above-mentioned problems, the invention described in claim 1 has two outboard motors arranged in parallel, and each outboard motor is a hull. In a steering device for an outboard motor of a small boat, which is supported by a bracket provided so as to tilt up around a tubular tilt shaft in a fixture provided in A piston rod is passed through the tilt shaft of either one of the two outboard motors, and the tip end of the piston rod is fixed between the outboard motor and the hydraulic cylinder. Holding means for holding the hydraulic cylinder, a first steering arm pivotally attached at one end and the other end to the tip of the piston rod and the steering lever of one of the outboard motors, respectively. Piston rod It is rotatably provided independently of the first steering arm around the axis, and one end and the other end are pivotally attached to the tip end of the piston rod and the steering lever of the other outboard motor. And a second steering arm that has been set.

According to a second aspect of the present invention, the tilt shaft of one of the two outboard motors is reciprocally held in the axial direction of the tilt shaft, and the tip end portion of the two outboard motors is held. A reciprocating rod positioned between the outboard motors, one end and the other end of the first reciprocating rod pivotally attached to the tip of the reciprocating rod and the steering lever of one of the outboard motors, respectively. And a first steering arm independently of the first steering arm around the central axis of the reciprocating rod, and one end and the other end of the reciprocating rod are provided at the tip and the other outboard motor. A second steering wheel pivotally attached to the steering lever
It is characterized by having the following.

According to a third aspect of the present invention, in the steering system according to the first or second aspect, one of the first and second steering arms is attached to the rod. A drag link rotatably provided around a central axis, and an arm member having one end pivotally attached to a pivot end of the drag link and the other end pivotally attached to a steering lever of an outboard motor. It consists of and.

The invention according to claim 4 has a hydraulic cylinder provided in a state where a piston rod penetrates the tilt shaft, and holding means fixed to the tilt shaft and holding the hydraulic cylinder. Is characterized by.

According to a fifth aspect of the present invention, in the steering apparatus according to the first or fourth aspect, the hydraulic cylinder has a cylinder tube having a flange portion formed at an end thereof. The holding means is characterized by having a mounting flange fixed to the tilt shaft and a fixing component for fixing the mounting flange and the flange portion of the cylinder tube.

[0026]

According to this structure, even when only one of the two outboard motors is tilted up, the first and second steering arms for each outboard motor are independently provided. As a result, each outboard motor can be smoothly steered.

One of the steering arms is pivotally attached to the rod, and the one end of the drag link is pivotally attached to the rod so as to be rotatable about the center axis of the rod. The above-mentioned operation can be obtained with a simple structure by using the arm member.

In order to fix the hydraulic cylinder for driving the steering arm to the tilt tube, the hydraulic cylinder is not fixed directly to the tilt tube, but to the tilt tube.
Since the holding means is used, it is not necessary to rotate the hydraulic cylinder and screw it into the tilt tube when attaching or detaching.

In this case, if the mounting flange fixed to the tilt shaft and the flange portion of the cylinder tube are fixed by a fixing component, the above-described action can be obtained with a simple structure.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 (a) is a schematic diagram showing the rearmost portion of the hull 2 of a small boat to which the outboard motor 1 is attached (the mounting position of the outboard motor 1 is not limited to the rearmost portion).

The outboard motor 1 has a casing 5 formed by connecting an upper casing 3 and a lower casing 4 made of aluminum alloy. An engine 6 (shown by a dotted line) is mounted on the upper casing 3, and the engine 6 is covered by a cowling 7 attached to the upper casing.

The engine 6 is adapted to rotationally drive a drive shaft 9 provided over the upper casing 3 and the lower casing 4. A thrust generating propeller 10 is provided at the lower end of the lower casing 4 with its axis substantially horizontal.
Is connected to the lower end of the drive shaft 9 through a propeller shaft shown in FIG.

Therefore, the outboard motor 1 can rotate and drive the propeller 10 by operating the engine 6, and generate a propulsive force in the rotational axis direction of the propeller 10 (propeller shaft 11). It is like this.

Further, the outboard motor 1 is provided so as to be tiltable and steerable. That is, the hull 2
The fixture shown at 13 is attached to the end of
In this fixture 13, a bracket 14 shown in the figure has a tubular horizontal shaft 15 (tilt shaft) called a tilt tube.
It is provided so as to be swingable in the vertical direction via. The upper casing 3 of the outboard motor 1 is supported on the bracket 14 by a steering shaft 16 shown in FIG.

The upper casing 3 of the outboard motor 1 is also provided.
As shown in FIGS. 1 (a) and 1 (b), the steering lever 17 is extended to the hull 2 side.
By driving 17 the outboard motor 1 is swung around the vertical axis of the steering shaft 16 shown in FIG.

According to this structure, the outboard motor 1
The bracket 14 is attached to the fixture 13 as shown in FIG.
The horizontal axis (a) of the tilt tube 15 shown in (b).
By swinging it around in the vertical direction, it is possible to jump up from the tilt-down state shown by the solid line in FIG. 1A to the tilt-up state shown by the alternate long and short dash line in FIG. Even in this tilt-up state, the steering shaft 1 can be operated by operating the steering lever 17.
The steering operation can be performed with the axis (b) of 6 as a fulcrum.

The outboard motor 1 is also equipped with a river (not shown).
The tilt-up or tilt-down posture is maintained by the lock mechanism and the tilt lock mechanism. Further, for example, a hydraulic drive mechanism may be used so that the tilting up of the outboard motor 1 can be performed without manual labor.

Next, the steering system for the outboard motor 1 will be described with reference to FIG.

In this embodiment, two outboard motors 1 are provided in parallel. 2 is a perspective view showing the two outboard motors 1, and FIG. 3 (a) is a top view thereof.
(B) is a front view.

The two outboard motors 1 are arranged in parallel at a predetermined interval and can be steered by a steering mechanism (steering device) 19 shown in each drawing.

The steering mechanism 19 includes a reciprocating hydraulic cylinder 20 fixed to the tilt tube 15 of the outboard motor 1 located on the right side in the drawing, a tip of a piston rod 21 of the hydraulic cylinder 20, and each outboard motor. The right steering arm 22 (first steering arm) and the left steering arm 23 (second steering arm) that are connected to the steering lever 17 of the machine 1.
Steering arm).

FIG. 4 is an enlarged front view showing the mounting portion of the right outboard motor 1. In the figure, 13 is a pair of fixtures, and 14 is a bracket. The tubular tilt tube 15 for holding the bracket 14 swingably.
Is non-rotatably installed between the fixtures 13 with one end 15a and the other end 15b protruding from the side faces of the pair of fixtures 13 by a predetermined dimension.

Also, one end portion 1 of the tilt tube 13
A male screw is formed on 5a and the other end 15b.
Of these, a lock nut 2 for fixing the hydraulic cylinder is attached to one end portion 15a of the tilt tube 15.
5 and the mounting flange 26 (holding means) are screwed in this order.

That is, the flange portion 27a formed on the cylinder tube 27 of the hydraulic cylinder 20 is fixed to the mounting flange 26 by a pair of fixing parts (bolts and nuts) shown in FIG.

The lock nut 25 is fastened to the mounting flange 26 side after the flange portion 27a of the cylinder tube 27 is fixed to the mounting flange 26, and the mounting flange 26 and the hydraulic cylinder 20 are tightened. It has a function of non-rotatably fixed to the tilt tube 15.

On the other hand, the piston rod 21 of the hydraulic cylinder 20 penetrates the tubular tilt tube 15 and extends from the other end 15b of the tilt tube 15 to the outside (left side).

Depending on the length of the piston rod 21, there may be a hindrance when the hydraulic cylinder 20 is assembled to the tilt tube 15 due to the mounting space of the hull 2. For this reason, the piston rod 21 is divided into two parts by the connecting part 29 provided in the middle part thereof. The two divided piston rods 21 are combined so that they cannot rotate relative to each other by the concavo-convex shape shown in the drawing, and are fixed inseparably by a pin 30.

Next, the right steering arm 22 and the left steering arm 23 provided at the tip of the piston rod 21 will be described.

The right steering arm 22 has a drag link 3 attached to the tip of the piston rod 21 so as to be rotatable around the axis (a) of the piston rod 21.
1 and a right arm 32 (arm member) connecting the drag link 31 and the steering lever 17 of the right outboard motor 1.

The drag link 31 has a ring-shaped base end 31a as shown in FIG. 5, and the base end 31a is coaxially attached to the tip of the piston rod 21. The piston rod 21 is rotatably provided around the axis of the piston rod 21 by being externally inserted into the small diameter portion 33a of the tip part 33. A washer 34 is provided between the tip end surface of the piston rod 21 and the base end portion 31a of the drag link 31.

The right arm 32 has one end portion 32.
a is attached to the tip end 31b of the drag link 21 so as to be rotatable about the axis of the drag link 31, and the other end 32b is attached to the steering lever 17 of the left outboard motor 1 as shown in FIG. It is rotatably attached.

The right arm 32 has one end 32
The rotation axis of a (the axis of the drag link 31) and the rotation axis of the other end 32b are formed to be parallel to each other. Therefore, the right rod 32 is not straight,
As shown in FIG. 2 and FIG. 3A, the shape is bent in the middle (in this FIG. 3A, each rotation axis is a direction perpendicular to the paper surface).

In order to perform a smooth steering operation, the right arm 32 has one end 32a and the other end 32b.
The rotation axis of is parallel to the axis (b) of the steering shaft 16 of the outboard motor 1 described above.

On the other hand, the left steering arm 23
As shown in FIG. 3B, the left arm 36 is substantially L-shaped.
Consists of As shown in FIG. 5, the base end portion 36a of the left arm 36 is rotatable around an axis line orthogonal to the axis line of the piston rod 21 in a tip part 33 fixed to the tip end of the piston rod 21. Is attached to.

The other end 36b of the left arm 36 is also provided.
3 is rotatably attached to the tip end portion of the steering lever 17 of the left outboard motor 1 as shown in FIG. Like the right arm 32, the left arm 36 is formed such that the rotation axis of the base end portion 36a and the rotation axis of the other end portion 36b are parallel to each other (FIG. 3 ( In a),
Each rotation axis is the direction perpendicular to the paper surface). In addition, these rotation axes are the axes (b) of the steering shaft 16 of the left outboard motor 1.
It is configured to be parallel to and is capable of smooth steering.

On the other hand, a driver's seat (not shown) provided on the side of the hull 2 is provided with a steering wheel 37 (steering means) shown in FIG. The handle 37 is connected to the cylinder tube 27 of the hydraulic cylinder 20 via a hydraulic pressure generation circuit 38 and a hydraulic pressure line 39 derived from the hydraulic pressure generation circuit 38.

That is, by operating the handle 37, it is possible to generate the required hydraulic pressure in the hydraulic pressure generating circuit 38, and thereby the hydraulic cylinder 20 is actuated to drive the piston rod 21 up and down. You can do it.

As a result, the left and right steering arms 22 and 23 attached to the tip of the piston rod 21.
The two outboard motors 1 are simultaneously steered and driven via the.

Next, the operation of the steering mechanism 19 will be described.

First, the case where both the two units are in the tilt-down state will be described with reference to FIG. For convenience of explanation, the joint portions of the steering arms 22 and 23 will be described with reference numerals A to E as shown in FIGS.

In this case, for example, when the piston rod 21 is driven to project, the right steering arm 2
The entire 2 (joints A, B, C) moves to the left side in the figure, and the outboard motor 1 on the right side steers in the direction indicated by the arrow in the figure. At this time, the joint B provided so as to be rotatable about the axis described above,
A relative rotational movement is performed at C, and smooth steering is performed.

The left outboard motor 1 is steered in the same direction as the right outboard motor 1 by moving the entire left steering arm 23 (joints D and E) to the left. To be done. Further, at this time, the joints D and E provided so as to be rotatable about the axis described above perform a relative rotational movement, so that smooth steering is performed.

Next, a case where only the left outboard motor 1 is tilted up will be described with reference to FIG.

In this case, the left outboard motor 1 tilts up about the swing center axis (a) of the bracket 14, that is, the tilt tube 15. As a result, the left steering arm 23 and the piston rod 21 rotate around the axis (a) of the piston rod 21.

The center lines of the tilt tube 15 and the piston rod 21 coincide with each other, and the piston rod 21 is rotatably held in the right tilt tube 15. Therefore, the left-side steering arm 23 is not unduly applied when the tilt-up is performed.

Even when the tilt-up is stopped at an arbitrary angle, the rotational axes of the joints D and E and the axis (b) of the steering shaft 16 of the outboard motor 1 are kept parallel. Therefore, the smooth steering operation can be performed as before tilting up.

On the other hand, since the right steering arm 22 is rotatably connected to the piston rod 21 at the joint A independently, the right steering arm 22 is unaffected by the tilt-up of the left outboard motor 1. No force is applied and the same state as before tilting up is maintained.

Therefore, as in the case described above, the two outboard motors 1 can be simultaneously and smoothly steered.

Next, a case where only the right outboard motor 1 is tilted up will be described with reference to FIG.

In this case, the right steering wheel
22 (drag link 31 and right arm 32)
However, while maintaining the relationship between the rotation axes before tilting up (the parallel relationship between the rotation axes of the joints B and C and the rotation axis (b) of the steering shaft 16 (shown in FIG. 3B)), Right outboard motor 1
Tilt up with. At this time, the drag link 31 rotates independently of the piston rod 21 around the central axis (a) of the piston rod 21, so that the left steering arm 23 is not subjected to an excessive force. .

Therefore, as in the case where only the left outboard motor 1 is tilted up, the outboard motors 1 can be steered simultaneously and smoothly.

Next, a method of disassembling this mechanism will be described.

This disassembly is performed when the outboard motor is removed from the hull for inspection or the like.

First, as shown in FIG. 5, by removing the tip part 33 from the tip of the piston rod 21, the piston rod 21 and the respective steering arms 22, 2 are removed.
Separate 3

Next, the hydraulic cylinder 20 is removed from the tilt tube 15. To this end, first, as shown in FIG.
The fixing part 28 that connects the bush 27 and the mounting flange 26 is removed. Then, the cylinder tube 27
While pulling to the right, the piston rod 21 is pulled out from the inside of the tilt tube 15.

On the way, the connecting portion 2 of the piston rod 21
When 9 is pulled out from the one end portion 15a of the cylinder tube 15 to the right side, the pin 3 attached to this connecting portion 29
By pulling out 0, the piston rod 21 is divided into two.

Finally, the cylinder tube 1
The disassembling of the drive mechanism 19 is completed by pulling out the piston rod 21 remaining in the section 5. In addition, when assembling, it can be performed by the opposite operation.

On the other hand, as a modification of this embodiment, it is possible to disassemble the piston rod 21 without removing the steering arms 22 and 23 from the tip thereof. In this method, the connecting portion 29 of the piston rod 21 is used.
Can be used when the piston tube 27 is provided on the piston tube 27.

In this case, the disassembly is started with the piston rod 21 fully retracted into the cylinder tube 27, that is, with the rudder turned to the right (direction opposite to the arrow shown in FIG. 2). To do.

First, after removing the cylinder tube 27 from the mounting flange 26 by the same method as described above, the piston rod 21 is pulled out from the inside of the tilt tube 15 until the connecting portion 29 is exposed.
Next, the connection is released by pulling out the pin 30 from the exposed connection part 29.

Once the connection is released, the tilt tube
The piston rod 21 remaining in the bush 15 is pulled out together with the steering arms 22 and 23 in the opposite direction (toward the steering arms 22 and 23).

By doing so, the steering wheel
The outboard motor 1 can be removed from the hull 2 without disassembling the frames 22 and 23 and the piston rod 21.

According to the configuration described above, the effects described below can be obtained.

First, when two outboard motors 1 are provided, even if only one outboard motor 1 is tilted up, both outboard motors 1 are simultaneously and smoothly. It has the effect of being able to steer.

This effect will be described with reference to a steering mechanism having the same structure as the conventional structure shown in FIGS.

In other words, the conventional configuration has two outboard motors 1.
The steering levers 17 of No. 1 were connected by tie rods shown in FIG. With such a configuration, when only one of the outboard motors 1 is tilted up as shown in FIG. 10,
Although depending on the tilt-up angle, there is a risk that the cowling 7 of the outboard motor 1, the right steering arm 41 or other peripheral parts may interfere with each other.

When one of the outboard motors 1 is tilted up, the angles and heights of the steering levers 17 of the respective outboard motors 1 change, so that both ends 40a and 40b of the tie rod 40 are changed.
Must be a universal joint. Further, if one of them is tilted up, the shaft will be twisted and an unreasonable force will be applied. Therefore, it is necessary to provide a structure for eliminating this.
Therefore, the configuration is complicated.

Further, if only one of the outboard motors 1 is tilted up while the two are connected by the tie rod 40, the length of the tie rod 40 does not change, so that the steering direction of the two outboard motors 1 is changed. There was also a gap in the.

On the other hand, according to the present invention, the tie rod 40 becomes unnecessary. Even when the outboard motors 1 are tilted up, the positional relationship between the outboard motors 1 and the respective steering arms 22 and 23 for driving (the relationship between the rotating shafts) is not changed as described above. Therefore, the steering arms 22 and 23 do not interfere with the cowling 7 and the like of the outboard motor 1.

As described above, by tilting up one of the outboard motors 1, the steering arm of the outboard motor 1 that is tilted up or the steering arm of the outboard motor 1 that is not tilted up. Unreasonable force is not applied to. Therefore, even when tilting up, smooth steering can be performed as in tilting down. Further, the tilting of one of the outboard motors 1 does not cause a deviation in the steering direction of the two outboard motors 1.

As a result of the above, there is an effect that it is possible to obtain a steering apparatus which eliminates the drawbacks of the conventional steering mechanism.

Secondly, there is an effect that the structure is simple and the disassembling and assembling are very easy.

That is, as described above, the tie rod 40
In the conventional configuration using, it is necessary to provide universal joints 40a and 40b at both ends of the tie rod 40. Further, twisting of the tie rod 40 and deviation of the steering direction due to tilting up of one outboard motor 1 are caused. To prevent this, a more complicated mechanism had to be provided.

On the other hand, according to the steering apparatus of the present invention, there is an effect that it is not necessary to provide such a complicated structure.

Further, in the conventional structure, the cylinder tube 27 of the hydraulic cylinder 20 is replaced with the tilt tube 15 described above.
Was screwed directly to. That is, the cylinder tube 27 is rotated around its axis and screwed into the one end portion 15a of the tilt tube 15 fixed to the fixture 13.

Therefore, when the hydraulic cylinder 20 is attached or disassembled, in order to prevent the hydraulic line 39 from being entangled, the cylinder tube 27 is connected to the hydraulic line 39.
It has to be performed with 39 removed, there is a concern about oil leakage from the hydraulic line 39, and troublesome air bleeding must be performed.

On the other hand, in the present invention, the mounting flange 26 is attached to the one end portion 15a of the tilt tube 15.
And, a lock nut 25 is provided, and the mounting flange 26 and the flange portion 27a of the cylinder tube 27 of the hydraulic cylinder 20 are fastened with a fixing part 29, so that the hydraulic cylinder 20 is fixed to the tilt tube 15. I decided to do it.

Therefore, the hydraulic cylinder 20 can be fixed to the tilt tube 15 without rotating the cylinder tube 27. Therefore, this mechanism can be disassembled and assembled without removing the hydraulic line 39 from the cylinder tube 27.

Further, in the above-mentioned embodiment, the piston rod 21 of the hydraulic cylinder 20 is divided into two parts in the axial middle part thereof. By connecting the two with a pin 30, it is possible to easily divide them.

As a result, when the space in the hull 2 is limited, the length of the piston rod 21 becomes
It is possible to effectively prevent the hindrance of the assembly of the hydraulic cylinder 20. In addition, by connecting both with the pin 30, without dividing within the tilt tube 15,
When the piston rod 21 is pulled out from the tilt tube, the piston rod 21 can be easily divided. Therefore, there is an effect that disassembly and assembly of this mechanism can be performed very easily.

The present invention is not limited to the above-mentioned embodiment, but can be variously modified without changing the gist of the invention.

For example, the configurations of the right and left steering arms 22 and 23 are not limited to the one embodiment. That is, as a condition of this steering arm, each steering arm can be independently rotated around the central axis (a) of the piston rod 21, and both arms can be rotated by each outboard motor 1. It is necessary for the steering shaft 16 to be rotatable about a rotation axis parallel to the axis (b) of the steering shaft 16. Therefore, various modifications are possible if this condition is satisfied.

For example, in the above embodiment, the right side steering arm 22 has the right side arm 32 attached to the tip of the drag link 31 at a substantially right angle, but the invention is not limited to this. Not a thing. For example, as shown in FIG. 11, the right arm 32 'is located on the left steering arm 2
It may be L-shaped as in the case of 3, and its base end portion 32'a is coaxially attached to the drag link 31.

As a structure for this, for example, a structure as shown in this figure can be considered. That is, the flange portion 43 'is provided on the base end portion 32'a of the right arm 32', and the flange portion 43 is rotated by the upper end surface of the drag link 31 and the cover 44 screwed to this. It should be held freely.

In the above embodiment, the right steering arm 22 is divided into two parts, the drag link 31 and the right arm 32, and the right steering arm 23 is a single L-arm. Although it was a character-shaped arm 36, as shown in FIG.
However, the right steering arm 22 may be divided into two arm parts 45 and 46, and the right steering arm 22 may be one L-shaped arm 47.

Even with such a structure, the same operation as that of the mechanism of the above-described embodiment is achieved, and the same effect can be obtained.

Further, in the above embodiment, the mounting flange 26, the lock nut 25 and the fixing component 29 are used as the holding means for fixing the hydraulic cylinder 20 to the tilt tube 15, but the invention is not limited to this. is not. For example, the configuration shown in FIGS. 13A and 13B may be used.

That is, in this structure, a male screw is provided on the tip portion 50 of the cylinder tube 27 of the hydraulic cylinder 20, and the tip portion 50 and one end portion 1 of the tilt tube 15 are provided.
5a are connected to each other using a coupling 51 shown in FIG.

This coupling 51 is composed of an inner nut 52 and an outer nut 53 which are engaged in the axial direction.
As shown in FIG. 13A, the inner nut 52 is screwed onto the one end portion 15a of the tilt tube 15. Then, by rotating the outer nut 53, the outer nut 5
3 is screwed onto the tip portion 50 of the cylinder tube 27 of the hydraulic cylinder 20.

Even with such a construction, this hydraulic cylinder can be fixed to the one end portion 15a of the tilt tube 15 without rotating the cylinder tube 27. The same effect can be obtained.

Further, in the above-mentioned embodiment, the two divided piston rods 21 are connected to each other by combining the concavities and convexities with each other and stopped by the pin 30, but the present invention is not limited to this.

For example, as shown in FIG. 14, one piston rod 21 may be provided with a female screw and the other piston rod may be provided with a male screw so as to connect them. In this case, chamfers 48 and 49 as shown in the drawing may be provided in order to use, for example, a wrench as the connecting tool.

Although the outboard motor 1 is attached to the rearmost portion of the hull 2 in the above embodiment, the present invention is not limited to this. For example, the outboard motor 1 is attached to the middle portion of the hull 2. It may be one.

[0115]

As described above, according to the present invention, when steering two outboard motors that can be individually tilted up, even if only one of the outboard motors is tilted up, there is no mechanical effect. Each outboard motor can be steered without difficulty.
Moreover, even in this case, the two outboard motors do not shift in the steering direction.

Since the hydraulic cylinder can be attached to and detached from the tilt tube without the operation of rotating and screwing the hydraulic cylinder, it is possible to assemble and disassemble the device without removing the hydraulic line of the hydraulic cylinder. Can be disassembled.

As a result, the effect of improving the durability and maintainability of the steering device can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an outboard motor according to an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a top view and a front view of the same.

FIG. 4 is an enlarged front view of the same.

FIG. 5 is likewise an exploded view of the steering arm.

FIG. 6 is a perspective view showing the same operation.

FIG. 7 is a perspective view showing the same operation.

FIG. 8 is an exploded view showing fixing of the hydraulic cylinder.

FIG. 9 is a perspective view showing a conventional steering device.

FIG. 10 is a perspective view showing the operation of a conventional steering apparatus.

FIG. 11 is an enlarged front view of a steering arm showing another embodiment.

FIG. 12 is an enlarged front view of a steering arm showing another embodiment.

FIG. 13 is an enlarged vertical sectional view of a fixed portion of a hydraulic cylinder showing another embodiment.

FIG. 14 is a perspective view of a connecting portion of a piston rod showing another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outboard motor, 2 ... Hull, 13 ... Fixing device, 14 ... Bracket, 15 ... Tilt tube (tilt shaft), 17 ... Steering lever, 19 ... Steering mechanism (steering device), 20 ... Hydraulic cylinder, 21 ... Piston rod, 22 ... Right steering arm, 23 ... Left steering arm, 26 ... Mounting flange (holding means), 27 ... Cylinder tu
B, 27a ... Flange portion, 28 ... Fixed part (holding means).

Claims (5)

[Claims] 1. Having two outboard motors arranged in parallel,
Each outboard motor is supported by a bracket that is tilted up around a tubular tilt axis in a fixture provided on the hull and is supported by the bracket so that it can be pivotally swiveled. In a steering apparatus for an outboard motor, a hydraulic cylinder in which a piston rod is passed through a tilt shaft of one of the two outboard motors, and a tip end portion of the piston rod is led out between the two outboard motors, A first steering gear, which is fixed to the tilt shaft and has one end and the other end, which are held by the holding means for holding the hydraulic cylinder, are pivotally attached to the tip of the piston rod and the steering lever of one of the outboard motors. And a first steering arm independent of the first rod, and the one end and the other end of the piston rod and the other end of the piston rod. Machine of the steering lever - pivotably mounted in the dies 2 steering A -
A steering device for an outboard motor of a small boat, comprising: 2. Having two outboard motors arranged in parallel,
Each outboard motor is supported by a bracket that is tilted up around a tubular tilt axis in a fixture provided on the hull and is supported by the bracket so that it can be pivotally swiveled. In a steering device for an outboard motor, a tilt shaft of any one of the two outboard motors is reciprocally held in the axial direction of the tilt shaft, and a tip portion is located between the outboard motors of the two outboard motors. The reciprocating rod, a first steering arm pivotally attached at one end and the other end to the tip of the reciprocating rod and the steering lever of one of the outboard motors, and the reciprocating rod. It is rotatably provided independently of the first steering arm around the central axis, and one end and the other end are pivotally attached to the tip of the reciprocating rod and the steering lever of the other outboard motor. The second steering arm that has been Steering system for a small watercraft of the outboard motor according to claim Rukoto. 3. The steering apparatus for an outboard motor of a small boat according to claim 1 or 2, wherein one of the first and second steering arms is attached to the rod and a central axis of the rod is provided. From a drag link rotatably provided around it, and an arm member pivotally attached at one end to the pivot end of the drag link and at the other end to the steering lever of the outboard motor. A steering device for an outboard motor of a small boat. 4. A small-sized outboard motor, which is supported by a bracket provided on a fixture provided on the hull so as to be tilted up about a tubular tilt axis and pivotably supported on the bracket. A steering apparatus for an outboard motor of a ship, comprising: a hydraulic cylinder provided with a piston rod penetrating the tilt shaft; and holding means fixed to the tilt shaft and holding the hydraulic cylinder. Steering device for outboard motors of small ships. 5. The steering apparatus for an outboard motor of a small boat according to claim 1 or 4, wherein the hydraulic cylinder has a cylinder tube having a flange portion formed at an end thereof, The means includes a mounting flange fixed to the tilt shaft, the mounting flange and the cylinder tube.
A steering device for an outboard motor of a small boat, comprising: a fixing part that fixes the flange portion of the bush.