JP2960205B2 - Support angle adjustment device for marine propulsion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support angle adjusting device for a marine propulsion device in an outboard motor or an inboard / outboard motor.

[0002]

2. Description of the Related Art A support angle adjusting device for a marine propulsion device in an outboard motor or an inboard / outboard motor normally moves the propulsion device to a tilt-down position during normal sailing, holds a propeller at a maximum water depth position, discharges the land, and mooring. At times, the propeller is moved to the tilt-up position to hold the propeller on the water surface, and when sailing in shallow water, the propeller is moved to an intermediate position between the tilt-down position and the tilt-up position to move the propeller to the water surface. It can be held directly below.

Conventionally, this type of supporting angle adjusting device uses a complicated link mechanism or a complicated hydraulic circuit. For example, Japanese Patent Application Laid-Open No. 58-122288 employs a mechanism for automatically moving a propulsion device to a tilt-down position or a tilt-up position by a hydraulic circuit and manually moving the propulsion device to an intermediate position when sailing in shallow water. .

[0004]

However, the above-mentioned conventional support angle adjusting device has a complicated hydraulic circuit because it has a mechanism for manually moving to an intermediate position during cruising in shallow water.
In addition, the driver has to perform a complicated operation of manually adjusting the position to an intermediate position while watching the rearward splash.

The present invention has been made to solve the above-mentioned problem, and has an apparatus for adjusting a support angle of a marine propulsion device capable of automatically setting the propulsion device to a shallow water navigation position with one touch without changing a hydraulic circuit. The purpose is to provide.

[0006]

For this purpose, a support angle adjusting device for a marine propulsion device according to the present invention comprises a propulsion device 5 rotatably mounted on a hull 1 and a tilt-up position C.
Alternatively, a propulsion device rotation cylinder 9 for rotating to the tilt down position A, a shallow water navigation detection sensor 7 for detecting the position of the propulsion device 5 during shallow water navigation, and driving of the propulsion device rotation cylinder 9 during engine operation When the propulsion device 5 is tilted up, the propulsion device 5
To stop at the shallow water cruising position B. It should be noted that the numbers added to the above configuration are to be compared with the drawings, and the configuration of the present invention is not limited by this.

[0007]

In the present invention, if the tilt switch is in the up state, it is determined whether or not the engine is stopped based on the signal of the engine speed sensor. If the engine is stopped, it is determined that the engine is to be landed or moored. , Set the propulsion unit to the tilt-up position, and if the engine is running, tilt the propulsion unit up. Set to.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an embodiment of a support angle adjusting device for a marine propulsion device of the present invention, FIG. 2 is a hydraulic control circuit diagram in the embodiment, and FIG. 3 is a diagram for explaining a control flow in the embodiment. FIG. In this embodiment, an example of an outboard motor is shown, but the present invention can also be applied to an inboard / outboard motor.

In FIG. 1, a support member 2 is fixed to a rear portion of a hull 1, and a propulsion device 5 is rotatably attached to the support member 2 via a rotation shaft 3. Further, a reaction force support cylinder 6 and a shallow running position detection sensor 7 are attached to the support member 2, and a propulsion device turning cylinder 9 is provided between the support member 2 and the propulsion device 5.

The reaction force supporting cylinder 6 slides the piston rod 6a by hydraulic pressure to support the reaction force from the propulsion device 5 during cruising, and the tip of the piston rod 6a contacts the propulsion device 5. It is detachable. The propulsion device rotation cylinder 9 slides the piston rod 9a by hydraulic pressure, and rotates the propeller 5a of the propulsion device 5 to the tilt-down position A, the shallow running position B, and the tilt-up position C. The shallows navigation position detection sensor 7 is a sensor for detecting the shallows navigation position B of the propulsion unit 5. It is configured to detect and output an electric signal. Since the shallow running position B changes depending on the size of the hull 1 and the propulsion device 5, the amount of protrusion of the sensor rod 7a can be adjusted by the adjusting screw 7b.

The reaction force supporting cylinder 6 and the propulsion device turning cylinder 9 are controlled by a hydraulic control circuit shown in FIG. The oil pump 10 is driven by a motor 11 so as to be able to rotate normally or reversely. The discharge port and the suction port of the oil pump 10 are used for turning a propulsion device through a switching valve 12, a first oil passage 13 and a second oil passage 14. It is connected to a cylinder 9. Also, the reaction force supporting cylinders 6 and 6 (the left and right 2
Is connected to the oil pump 10 via a first oil passage 13 and a third oil passage 15.

The switching valve 12 includes a first check valve 12a and a second check valve 12b provided on the left and right, and a spool 1 slidably provided between the two check valves 12a and 12b.
2c, and when oil is supplied to either one of the two check valves 12a and 12b and the spool 12c,
The check valves 12a and 12b are both opened, and when no oil is supplied, both check valves 12a and 12b are closed. Reference numeral 16 denotes an oil reservoir, and R denotes a relief valve that opens when the oil pressure becomes a predetermined value or more.

The electronic control unit 17 includes a tilt switch 1
8. Signals from the shallow running detection sensor 7 and the engine speed detection sensor 19 are input, arithmetic processing is performed based on these input signals, and an output signal is sent to the relay 20 to drive and control the motor 11. Have been. In addition,
21 is a battery.

The operation of the hydraulic control circuit having the above configuration will be described. In the case of the tilt-up operation of the propulsion device 5, the motor 11 and the oil pump 10 are driven, for example, in the forward direction, and the oil is supplied to the first check valve 12 a and the first oil passage 13.
Is supplied to one chamber of the propulsion device rotation cylinder 9 through
The oil in the other chamber is supplied to the second oil passage 14 and the second check valve 12.
b, the oil is returned to the oil pump 10 so that the piston rod 9a is extended and the tilt-up position C in FIG.
Set to. In the case of the tilt-down operation of the propulsion device 5, the motor 11 and the oil pump 10 are driven in reverse to supply oil to one chamber of the propulsion device rotation cylinder 9 via the second check valve 12 b and the second oil passage 14. Then, the oil in the other chamber is returned to the oil pump 10 through the first oil passage 13 and the first check valve 12a, thereby contracting the piston rod 9a and setting the piston rod 9a to the tilt-down position A in FIG.

Next, the control flow of the present invention will be described with reference to FIG. First, in step S1, the state of the tilt switch 18 is determined. If the state is the down state, the process proceeds to step S3, in which the motor 11 is reversed to tilt down the propulsion unit 5, and in step S6, the tilt switch 18
It is determined whether or not the motor is off, and if it is off, the process proceeds to step S9, and the motor 11 is stopped. If the tilt switch 18 is in the up state, it is determined in step S2 whether or not the engine is stopped based on a signal from the engine speed sensor 19, and if the engine is stopped, it is determined that landing, mooring, etc. is performed, and step S4 is performed. Then, the motor 11 is rotated forward to tilt up the propulsion unit 5, and it is determined in step S7 whether or not the tilt switch 18 is off. If the tilt switch 18 is off, the process proceeds to step S9 to stop the motor 11. In step S1, if the tilt switch 18 is off, this determination is repeated.

If the engine is running in step S2, the process proceeds to step S5, in which the motor 11 is rotated forward to tilt up the propulsion unit 5, and in step S8 the signal from the shallow cruise position sensor 7 is input. Perform tilt up. When the propulsion unit 5 is tilted up to the position B in FIG. 1 and a signal from the shallow water cruising position sensor 7 is input, the process proceeds to step S9 and the motor 11 is stopped.

[0017]

As is apparent from the above description, according to the present invention, a propulsion device rotatably mounted on a hull and a propulsion device for rotating the propulsion device to a tilt-up position or a tilt-down position are provided. A cylinder, a shallow running detection sensor for detecting the position of the propulsion unit during shallow running, and the shallow running when the propulsion unit is tilted up by driving the propulsion unit rotating cylinder during engine operation. Means for stopping the propulsion unit at the shallow water navigation position based on a signal from the detection sensor can automatically set the thruster to the shallow water navigation position with one touch without changing the hydraulic circuit.

[Brief description of the drawings]

FIG. 1 shows a support angle adjusting device for a marine propulsion device according to the present invention.
Side view showing an embodiment

FIG. 2 is a hydraulic control circuit diagram in the embodiment.

FIG. 3 is a diagram for explaining a control flow in the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hull, 5 ... Propulsion machine, 7 ... Shallow running detection sensor 9 ... Propulsion machine rotation cylinder, 10 ... Oil pump, 11
... Motor A ... Tilt down position, B ... Shallow cruising position, C ... Tilt up position

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-237893 (JP, A) JP-A-64-44396 (JP, A) JP-A-63-301196 (JP, A) 229693 (JP, A) JP-A-61-105296 (JP, A) JP-A-58-122288 (JP, A) JP-A-1-168592 (JP, A) JP-A-62-83298 (JP, A) Japanese Utility Model Application Sho 57-167000 (JP, U) Japanese Utility Model Application Sho 47-17543 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) B63H 20/08

Claims (1)

(57) [Claims] 1. A propulsion device rotatably mounted on a hull,
A thruster rotation cylinder that rotates the thruster to a tilt-up position or a tilt-down position, a shallow water running detection sensor that detects the position of the thruster during shallow water navigation,
Means for stopping the propulsion unit at a shallow water navigation position by a signal from the shallow water navigation detection sensor when the propulsion unit rotation cylinder is driven during engine operation to tilt the propulsion unit up. Angle adjustment device for marine propulsion machines.