JP4102518B2 - Outboard motor with tilt up mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outboard motor equipped with a tilt-up mechanism, and more particularly to a safety measure for preventing the outboard motor from falling off, preventing damage, safe traveling, and stopping.
[0002]
[Prior art]
In an outboard motor equipped with a conventional tilt-up mechanism, for example, a hydraulic lock type is adopted. When an obstacle such as driftwood collides with the outboard motor, the outboard motor is tilted by releasing the hydraulic lock. -The up part was tilted up, and the tilt up part was returned to the original position after the obstacle passed. When obstacles such as protrusions and driftwood in the shallows collide with the outboard motor, increasing the rigidity of the outboard motor will prevent the outboard motor from being destroyed. In the conventional outboard motor, a desired speed is ensured by making a compromise with a certain degree of rigidity. Moreover, when sailing in shallow water, the vehicle was operated in a half-tilt state with a relatively small tilt angle so that the outboard motor did not collide with the bottom of the water.
[0003]
[Problems to be solved by the invention]
In the hydraulic lock, since the hydraulic operation is inevitably slightly delayed with respect to the impact at the time of collision, an improvement in responsiveness has been desired. In addition, it is extremely dangerous to perform excessive operations that significantly deviate from the operating specifications such as starting the engine and increasing the engine speed in a tilted up state, so that such excessive operation is suppressed. Measures to do were desired.
[0004]
[Means for Solving the Problems]
Therefore, in the invention of claim 1,
A driving unit that is rotatably supported at the stern, the outboard motor includes a tilt cylinder, a for connecting the stern and the driving unit,
It said tilt cylinder, a thrust propeller generates provided to the driving unit, which supports,
A pin for connecting and supporting the tilt cylinder and the drive unit is provided,
With the pin, the thrust is applied to the tilt cylinder even when moving backward ,
When an obstacle collides with the outboard motor when moving forward, the pin is broken and the outboard motor tilts up.
[0005]
In the invention of claim 2,
An angle sensor for detecting a rotation angle of the drive unit ;
A signal is transmitted from the angle sensor to the alarm device or the engine when the driving unit rotates more than a predetermined angle.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic side view of an outboard motor 100 equipped with a tilt-up mechanism according to the first and second aspects of the present invention. FIG. 2 is an enlarged view of a portion A in FIG. In FIG. 1, the outboard motor 100 includes a drive unit 11 including a propeller 8, a rudder unit 20, a tilt cylinder 40, and the like.
[0007]
The fixed portion 30 of the outboard motor 100 is fixed to the stern 50. The fixed portion 30 includes a rudder portion 20 that can be rotated about a vertical axis. The rudder unit 20 is rotated by a drive mechanism (not shown), and by rotating the rudder unit 20, the direction of the drive unit 11 (propeller 8) can be changed to change the course of the ship.
[0008]
As shown in FIG. 1, the support part 7 is provided in the upper part of the rudder part 20, and the support part 7 is supporting the end of the bracket 15 so that rotation is possible. The other end of the bracket 15 is fixed to the drive unit 11 and supports the drive unit 11. A support portion 4 is provided at the lower portion of the rudder portion 20.
[0009]
The tilt cylinder 40 includes a cylinder part 1 and a rod part 2, and the rod part 2 is inserted into the cylinder part 1. As shown in FIG. 1, the left end of the cylinder portion 1 is rotatably supported by the support portion 4 of the rudder portion 20.
[0010]
As shown in FIG. 2, a screw portion 2 b is provided at the right end of the rod portion 2. A joint 16 having a female threaded portion at the left end is screwed into the threaded portion 2b. The joint 16 is inserted into the fitting hole 18 a of the support member 18 supported by the support shaft 3. The joint 16 is provided with a hole 16a. Further, a through hole 18 c is provided in the cylindrical portion 18 b that forms the fitting hole 18 a of the support member 18.
[0011]
In a state where the joint 16 is inserted into the fitting hole 18a of the support member 18, alignment is performed such that the hole 16a and the through hole 18c are concentric, and the pin 17 penetrates the joint 16 and the support member 18. Is fixed. The pin 17 is provided with a large-diameter head at one end, and a screw is cut at the other end (not shown), so that the nut 17a is screwed so as not to come off. The rod part 2 (tilt cylinder 40) supports the drive part 11 by the support part 3 via the joint 16 and the support member 18.
[0012]
When the pin 17 comes off and the joint 16 comes out of the fitting hole 18a of the support member 18, the tilt cylinder 40 loses its support at the right end, but is supported by the support bracket 10 provided on the fixed portion 30, and thus from the horizontal position. Will not fall to the right.
[0013]
A piston 2a is fixed to the left end of the rod portion 2, and the piston 2a partitions the inside of the cylinder portion 1 into a chamber A (left side) and a chamber B (right side). As shown in FIG. 1, one end of a flexible pipe 5 is connected to the chamber A, and one end of a flexible pipe 6 is connected to the chamber B. The other end of the pipe 5 and the other end of the pipe 6 are connected to a hydraulic circuit (not shown) provided in the outboard motor 100, and pressure oil is supplied to the chamber A and the chamber B via the pipe 5 and the pipe 6. Can be supplied.
[0014]
When pressure oil is supplied to the chamber A through the pipe 5 so that the pressure on the chamber A side becomes higher than the pressure on the chamber B side, the piston 2a moves to the right as viewed in FIG. It rotates counterclockwise around 7 and is tilted up as shown in FIG. Conversely, when pressure oil is supplied to the chamber B via the pipe 6 so that the pressure on the chamber B side becomes higher than the pressure on the chamber A side, the piston 2a moves to the chamber A side, and the drive unit 11 tilts as shown in FIG. Return from the up state to the original state in FIG.
[0015]
An angle sensor 19 is installed in the support portion 7, and the angle sensor 19 detects the rotation angle of the bracket 15, that is, the rotation angle of the drive unit 11. A predetermined angle (for example, 45 degrees) is set in advance, and when the rotation angle of the drive unit 11 reaches the set angle, a signal is transmitted to the engine wirelessly or via a wiring (not shown), or A signal is transmitted to the alarm device 13 to issue an alarm.
[0016]
When the obstacle 90 (FIG. 4) collides with the outboard motor 100, the pin 17 is broken by the impact of the collision, the support member 18 and the joint 16 are separated, and the drive unit 11 is pressed by the obstacle 90 to move the support unit 7. It rotates to the center and tilts up as shown in FIG. Therefore, the drive unit 11 is not damaged, and the drive unit 11 naturally tilts and goes down when passing through the obstacle 90. Thereafter, the joint 16 is inserted into the fitting hole 18 a of the support member 18 so that the thrust (thrust) of the propeller 8 can be supported by the tilt cylinder 40. Here, if a spare pin 17 is prepared, the support member 18 and the joint 16 can be connected and restored to the original state, so that the thrust toward the rear of the propeller 8 can be transmitted to the tilt cylinder 40, You can also go backwards.
[0017]
When sailing in shallow water, the drive unit 11 is rotated to a minimum so that the drive unit 11 does not interfere with the half-tilt state, that is, the bottom of the water. The angle sensor 19 detects the rotation angle at this time and transmits a detection signal to the engine via a wiring (not shown). The engine controls the engine within a range of an allowable engine speed corresponding to a preset rotation angle of the drive unit 11. For example, the engine speed allowed when the rotation angle is 20 degrees is set to 80% of the maximum engine speed. The method for setting the allowable engine speed is determined by the specifications of the ship on which the outboard motor 100 is mounted.
[0018]
When the angle sensor 19 detects a rotation angle greater than or equal to a predetermined value, a signal may be transmitted to the alarm device 13 to issue an alarm, and the operator notices an abnormality by the alarm and operates the engine manually. May be.
[0019]
Further, in the case of a marine propulsion device equipped with a clutch, if the drive unit 11 is tilted up when the engine is started, the clutch is set so as not to be fitted, and the clutch is fitted and detached when sailing. May be set.
[0020]
【The invention's effect】
In the outboard motor according to the first aspect of the invention, when the obstacle 90 collides with the outboard motor 100, the pin 17 is destroyed and tilted up, so the outboard motor 100 itself is not destroyed. In addition, it is possible to protect the hull (stern 50) without dropping off, and to advance forward even after the obstacle 90 is tilted and tilted down to return the outboard motor 100 to its original posture. Because it can be done, wreck can be avoided.
[0021]
In the outboard motor according to the second aspect of the present invention, an angle sensor 19 is provided for detecting the rotation angle of the portion to be tilted up, and the portion to be tilted up (drive unit 11) is rotated by a predetermined angle or more. At this time, since the signal is transmitted from the angle sensor 19 to the alarm device 13 or the engine, it is possible to give an alarm to notify the ship operator of an abnormality or to control the engine speed not to increase. Even if a person with little knowledge is maneuvering, it is possible to suppress operations that deviate significantly from the operation specifications.
[Brief description of the drawings]
FIG. 1 is a schematic side view of an outboard motor equipped with a tilt-up mechanism according to the first and second aspects of the present invention.
FIG. 2 is an enlarged view of a portion A in FIG.
FIG. 3 is a schematic side view of an outboard motor tilted up by a tilt cylinder.
FIG. 4 is a schematic side view of an outboard motor tilted up when an obstacle collides with the outboard motor.
[Explanation of symbols]
8 Propeller 11 Drive 13 Alarm (alarm device)
17 pin 19 angle sensor 40 tilt cylinder 90 obstacle

Claims (2)

A driving unit that is rotatably supported at the stern, the outboard motor includes a tilt cylinder, a for connecting the stern and the driving unit,
It said tilt cylinder, a thrust propeller generates provided to the driving unit, which supports,
A pin for connecting and supporting the tilt cylinder and the drive unit is provided,
With the pin, the thrust is applied to the tilt cylinder even when moving backward ,
When an obstacle collides with the outboard motor when moving forward, the pin is destroyed and the outboard motor tilts up.
An outboard motor equipped with a tilt-up mechanism. An angle sensor for detecting a rotation angle of the drive unit ;
A signal is transmitted from the angle sensor to an alarm device or an engine when the drive unit rotates more than a predetermined angle;
An outboard motor equipped with a tilt-up mechanism according to claim 1 .

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