JPH01311993A - Steering device for outboard engine - Google Patents

Abstract

PURPOSE:To improve the steering feeling in a high speed sailing by installing a steering angle controlling mechanism which controls the steering angle of an outboard engine when a boat exceeds a required speed, on a steering power transmission mechanism connecting a rudder with an outboard engine. CONSTITUTION:A rudder 2 is connected with an outboard engine 5 through a steering power transmission mechanism 6. The steering power transmission mechanism 6 is equipped with a steering angle controlling mechanism A which controls the steering angle of the outboard engine 5 when a boat exceeds a required speed. Equipped with the first control member 7 connected to the steering power transmission mechanism 6 and the second control member 9 connected to an accelerator lever 8, the steering angle controlling mechanism A controls the steering angle of the outboard engine 5 by engaging the second control member 9 with the first control member 7 when a boat exceeds a required speed. Since this enables to limit the steering angle of the outboard engine to an angle smaller than the maximum steering angle when a boat is sailing over a required speed, the steering feeling in a high speed sailing as well as the steering performance are improved.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a steering device for an outboard motor.

Conventional technology A steering system for a small boat uses a steering force transmission mechanism consisting of cables, guide rods, tailer rods, tillers, etc., which connects a steering wheel installed in the cabin and an outboard motor attached to the transom via a swivel bracket. The outboard motor is operated to a required steering angle about the rudder shaft in accordance with the amount of operation of the steering wheel (see Japanese Patent Laid-Open No. 113797/1983).

Problems to be Solved by the Invention However, the above-mentioned outboard motor steering system was structured so that it could be freely steered to the maximum angle even when running at high speeds, so if the same steering as at low speeds was performed, the steering feeling would be different. The problem was that it worsened.

SUMMARY OF THE INVENTION Therefore, the present invention provides a steering system for an outboard motor that can adaptively control the steering angle according to the speed of the boat.

Means for Solving the Problem The steering force transmission mechanism that connects the steering wheel and the outboard motor is provided with a steering angle control mechanism that regulates the steering angle of the outboard motor at a required boat speed or higher.

Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 to 3, the steering system of this embodiment roughly consists of a steering wheel 2 disposed inside a cabin (not shown) of a hull I.
and an outboard motor 5 attached to the transom 3 of the hull l via a swivel bracket 4 are connected via a steering force transmission mechanism 6.

The steering force transmission mechanism 6 is provided with a steering angle control mechanism A that regulates the steering angle of the outboard motor 5 at or above a required boat speed. This steering angle control mechanism A includes a first control member 7 connected to a steering force transmission mechanism 6 and a second control member 9 connected to an accelerator lever 8. The steering angle of the outboard motor 5 is regulated by engaging the member 9 with the first control member 7. The accelerator lever 8 is disposed in the cabin of the hull I, and is connected to an engine (not shown) connected to the screw IO of the outboard motor 5 via an accelerator cable II.

Here, the transom 3 has a pair of clamp brackets facing each other in the width direction of the ship! 2 is attached to the transom 3 via a motor pad 13 attached. A swivel bracket 4 is attached to the pair of clamp brackets 12 so as to be rotatable in the vertical direction about a guide pipe 14.

A tiller I5 extending from the outboard motor 5 toward the side opposite to the screw lO (bow side) is attached to the rear of the swivel bracket 4 so as to be rotatable in the transverse direction about the rudder shaft 16.

The steering force transmission mechanism 6 includes a steering wheel cable 17 connected to an output shaft of the steering wheel 2 (not shown). The rudder axle cable end 18 connected to this. The steering wheel rod 19 connected to this. Interview tiller 15. Add this to slit 20 and tiller pin 2I
A dummy tiller 22. is connected to the dummy tiller 22 to constitute an angle expanding mechanism. A tiller rod 24 connected to this with a dummy tiller pin 23. A guide rod 26 is connected to this with a pin 25 and is slidably internally fitted into the guide pipe 14.
．． Rudder cable 27 connected to this. Rudder cable end 28 connected to this. Each of the rudder rods 29 is connected to the rudder rods 29. The dummy tiller 22 has a dimension r between the rudder axle I6 and the tiller pin 21 toward the rear of the rudder axle I6 on the ship width center line Q1 passing through the rudder axle 16 with respect to the swivel bracket 4.
It is assembled so that it can horizontally rotate in the width direction of the ship in a circular arc around a hypothetical center O assumed at a position with the same dimension r.

The first control member 7 of the steering angle control mechanism A is attached to a base 40 fixed on the hull l so as to be rotatable in the longitudinal direction of the hull about a pin 41.

The extending end of the steering wheel rod I9 is connected to the free end side portion of the first control member 7 by a pin 42. The extending end of the rudder rod 29 is connected to the rear side of the free end of the first control member 7 by a pin 43. A control hole 48 is formed in the intermediate portion between the pins 42 and 43 of the first control member 7 and the pin 4I. The control hole 48 is formed by combining a plurality of fan-shaped holes 5.0, 51, 52.53 having different included angles in plan view with the pin 4I as the center. A plurality of fan-shaped holes 50 to 53
As it approaches the pin 41, the radius of curvature becomes smaller and the included angle becomes larger. In other words, the first fan-shaped hole 50 has the maximum radius of curvature and the minimum included angle.

The second fan-shaped hole 5I has a smaller radius of curvature than the first fan-shaped hole 50, but has a larger included angle. The third fan-shaped hole 52 has a smaller radius of curvature than the second fan-shaped hole 51, but has a larger included angle. The fourth fan-shaped hole 53 has a smaller radius of curvature than the third fan-shaped hole 52, but has a larger included angle. These first to fourth
The fan-shaped holes 50 to 53 are overlapped with their included angle bisectors coincident with each other, and at the boundary corner between the first fan-shaped hole 50 and the second fan-shaped hole 51, there is a front hole that faces each other in the longitudinal direction of the hull. A protrusion 54 and a rear protrusion 55 are formed, and the second fan-shaped hole 51 and the third
A front protrusion 56 and a rear protrusion 57 facing each other in the longitudinal direction of the hull are formed at the boundary corner with the third fan-shaped hole 52.
A front protrusion 58 and a rear protrusion 59 are formed at the corner of the boundary between the fourth fan-shaped hole 53 and the fourth fan-shaped hole 53 .

Further, a steering force adjustment mechanism 60 is attached to the first control member 7. The steering force adjustment mechanism 60 is connected to the pin 42 of the first control member 7.
．． A slit 61 is formed in the free end on the distal side of the pin 43 in an arc shape in plan view with the pin 4 as the center, and the slit 6!
The transfer element 62 is slidably attached to the base 40.
A spring 6 moored astride a fulcrum 63 erected above.
4, when the steering angle of the outboard motor 5 exceeds the steering angle (30 degrees) that allows safe navigation even at boat speed or high speed, the spring 64
The structure is such that the steering wheel 2 expands and increases the operating force of the steering wheel 2.

The second control member 9 of the steering angle control mechanism A is attached to the base 40 so as to be rotatable in the ship width direction about a pin 70. The free end of the second control member 9, which passes over the first control member 7, is connected to an accelerator lever 8. Specifically, a control cable 71 is connected to the intermediate portion of the accelerator cable II, a control cable end 72 is connected to this, a control rod 73 is connected to this, and the extending end of the control rod 73 is connected to the second control member 9. It is connected to the free end of the pin 74 by a pin 74.

A stopper 75 that is inserted into the control hole 48 is provided at the center of the second control member 9 above the control hole 48 .

Here, as shown by the solid line in FIG. 1, when the steering wheel 2 is operated so that the accelerator lever 8 is in the neutral position, the steering angle of the outboard motor 5 is 0 degrees, and the hull I is traveling straight. ,
A bisector of the included angle of the control hole 48.

Pin 41. Stopper 75. Center of slit 6I in the longitudinal direction of the hull, transfer 1,62. Spring 64. The fulcrum 63 etc. is arranged on a straight line Q extending in the transverse direction perpendicular to the transverse center line Q1, and the accelerator lever 8 is moved from the neutral position indicated by the solid line to the low speed position indicated by the dashed-dot line, and from the imaginary line to the neutral position indicated by the solid line. Assuming that the second control member 9 is operated to the high speed position shown in FIG.
And, it moves within the control hole 48 without interfering with the rear projections 55, 57, and 59.

In addition, the steering wheel cable end +8. Rudder cable end 28
．． Each control cable end 72 is connected to the base 40 with a pin 80,81,82. Further, the imaginary line drawn around the outboard motor 5 in FIG. 1 indicates the outer shape of the cover of the outboard motor 5.

According to the above embodiment structure, as shown in FIG. 2, when the accelerator lever 8 is operated to the low speed position, the second control member 9
rotates around the pin 70, and the stopper 75 is positioned within the fourth fan-shaped hole 53. In the rotating state of the second control member 9 shown in FIG. 2, when the steering wheel 2 is operated to face rudder or steering, the steering force transmission mechanism 6 ．． dummy tiller 22
The outboard motor 5 horizontally rotates about the rudder axis I6 into a surface rudder state shown by a solid line, or horizontally into a steering state shown by a phantom line. In this low-speed operation state of the accelerator lever 8, the stopper 75 is located in the fourth fan-shaped hole 53 with the largest included angle among the control holes 48, so that the stopper 75 is linked to the surface rudder operation or steering operation of the steering wheel 2. First thing to do
The $ control member 7 can rotate within the largest rotation angle (2βl) around the pin 4I. With the accelerator lever 8 in the low speed position, when the rudder shaft 2 is operated at the same time as the rudder, the first! The control member 7 rotates toward the rear of the hull with a large rotation angle β1 about the pin 41, as shown by the solid line in FIG. The ship is steered into a surface rudder state with a large steering angle α (60 degrees in this embodiment) at the center, and the stopper 75 is arranged to face the front protrusion 58 in the width direction of the ship.

In addition, when the accelerator lever 8 is in the low speed position,
Contrary to Moe's explanation, if you operate steering wheel 2 at the same time, the first
The control member 7 rotates toward the front of the boat with a large rotation angle β about the pin 4I as shown by the phantom line in FIG. The boat is steered to a steered state with a large steering angle α1 about the shaft 16, and the stopper 75 is arranged to face the rear protrusion 59 in the width direction of the ship. When the stopper 75 is disposed opposite the front projection 58 or the rear projection 59 in the width direction of the ship, that is, when the steering angle of the outboard motor 5 is at or around the maximum 2α, , accelerator lever
8 to the high speed position, the stopper 75 comes into contact with the front protrusion 58 or the rear protrusion 59, that is, the second control member 9 engages with the first control member 7, and the accelerator lever
8 cannot be operated to the high speed side.

As shown in FIG. 3, when the accelerator lever 8 is operated to the high speed position, the second control member 9 rotates about the pin 70, and the stopper 75 is located within the first fan-shaped hole 50.

In the rotating state of the second control member 9 shown in FIG.
When the steering wheel 2 is operated for surface rudder or steering, the steering force transmission mechanism 6. Through the dummy tiller 22 and the like, the outboard motor 5 horizontally rotates about the rudder shaft 16 into a surface rudder state shown by a solid line, or horizontally into a steering state shown by a phantom line. ′
In this high-speed operation state of the accelerator lever 8, the stopper 75 is located in the first fan-shaped hole 50 with the smallest included angle among the control holes 48, so that it is linked to the surface rudder operation or steering operation of the steering wheel 2. The first control member 7 can rotate within the smallest rotation angle (2βt) around the bin 41. When the accelerator lever 8 is in the high speed position, if the steering wheel 2 is operated at the same time, the first
The control member 7 rotates toward the rear of the ship with a small rotation angle β about the bin 41, as shown by the solid line in FIG.
As shown by the solid line in FIG. 3, the outboard motor 5 is steered to the surface rudder state with a small steering angle α (30 degrees in this embodiment) about the rudder shaft 16, and the stopper 75 is rotated to the first position.
It is arranged at the front corner of the fan-shaped hole 50 of the hull. In addition, when the accelerator lever 8 is in the high speed position, if the steering wheel 2 is operated all at once, contrary to the above description, the first control member 7 will move around the bin 41 as shown by the imaginary line in FIG. The outboard motor 5 rotates forward with a small turning angle β, and the outboard motor 5 turns a small steering angle α around the rudder shaft 16, as shown by the imaginary line in FIG.

is steered to the steering state, and the stopper 75
is arranged at the rear corner of the hull of the first fan-shaped hole 50. In this manner, when the stopper 75 is disposed at each of the left corner or the rear corner of the first fan-shaped hole 50, that is, when the accelerator lever 8 is operated to the high speed position, the steering wheel 2 is Even if an attempt is made to increase the steering angle, the stopper 75 comes into contact with the front corner or the rear corner of the first fan-shaped hole 50, that is, the second control member 9 engages with the first control member 7. Since the steering wheel 2 cannot be operated, the steering angle of the outboard motor 5 can be restricted to a small steering angle of 2α. As described above, according to this embodiment, the angle at which the boat can be steered is regulated according to the boat speed, so that the steering feeling during high-speed running can be improved.

Note that the present invention is not limited to the above-mentioned embodiments, and although not shown in the drawings, when the engine (not shown) exceeds the required rotation speed to reach the early stage of the high speed region of the accelerator lever 8, for example, the second control A structure in which the steering angle control mechanism 8 is operated to cause the member 9 to engage with the first control member 7 to regulate the steering angle of the outboard motor 5 to a small angle can also be applied.

Effects of the Invention As described above, according to the present invention, the steering angle of the outboard motor can be limited to an angle smaller than the maximum steering angle when the boat speed is higher than a required speed, such as at a high speed, and at a required speed, such as at a low speed. At lower speeds, the outboard motor can be steered to its maximum steering angle.
There is a novel effect in that the steering feeling during high-speed driving can be made more consistent, more consistent, and the steering performance can be improved.

[Brief explanation of the drawing]

Fig. 1 is a plan view configuration diagram showing one embodiment of the present invention, Fig. 2 is an explanatory diagram of the operation of the same embodiment when the accelerator lever is operated to a low speed position, and Fig. 3 is a diagram of the same embodiment. accelerator lever
FIG. 3 is an explanatory diagram of the operation in a state where the switch is operated to a high speed position. 2... Rudder wheel, 5... Outboard motor, 6... Steering force transmission mechanism, A... Steering angle control mechanism.

Claims (1)

[Claims] (1) Steering of an outboard motor characterized in that the steering force transmission mechanism that connects the helm and the outboard motor is provided with a steering angle control mechanism that regulates the steering angle of the outboard motor at a required boat speed or higher. Device.