JPH02270697A - Separating lubricating device for outboard motor - Google Patents

Abstract

PURPOSE:To prevent the erroneous operation of an operation part by detecting the tilt angle for the ordinary position of an outboard motor body by a trim angle detector and suspending the operation of the operation part under the condition that the detection value of the trim angle detector reaches a previously determined critical tilt angle. CONSTITUTION:As for an outboard motor 10, a propulsion unit 15 is supported onto a swivel bracket 14 which is supported in tiltable manners through a tilt shaft 13 onto an installation bracket 12. In the propulsion unit 15, an engine 16 is installed in the upper part, and the lubricating oil in a subtank 26 fixed in the upper part of the side surface of the engine 16 is sent under pressure into an intake manifold 18 through each discharge pipe 29 by a lubricating oil pump 28. Into the subtank 26, the lubricating oil in a main tank 22 is supplied by a pump 23 according to the output of an oil level detector 36. In this case, a trim angle detector 58 for detecting the trim angle of the propulsion unit 15 for the bracket 12 is installed, and when the detection value reaches a prescribed critical detection angle, the operation of the pump 23 is suspended.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to a separate lubrication device for an outboard motor.

[Prior Art] As one type of lubrication system for outboard motors, there is a separate lubrication system that stores fuel and lubricating oil in separate tanks and supplies the lubricating oil to the engine using a lubrication pump.

Here, the above-mentioned separate lubrication system includes a lubricating oil tank attached to the outboard motor body that is supported so as to be tiltable around a substantially horizontal axis from a normal position with respect to the hull, and a lubricating oil tank that measures the displacement of the oil level in the lubricating oil tank. An oil level detector that enables detection,
It has an operating part that controls, for example, the operation of pumping up lubricating oil from the inboard tank to the lubricating oil tank, or warns of a low level of remaining oil in the lubricating oil tank, depending on the detection result of the oil level detector. There is something like that.

However, the above outboard motor has a large = 1 change in the water surface funnel.
In order to obtain the best sailing condition, adjust the sailing attitude by
Sometimes the outboard motor is cruising with the main body tilted (tilt up, toss up) relative to the hull.

In such a case, the lubricating oil tank will tilt along with the outboard motor body, and the oil level relative to the oil level detector will be abnormally displaced, even though it is not necessary to refill the lubricating oil tank. The detection result of the oil level detector may be incorrect, such as continuing to pump up the lubricating oil, causing an overflow of lubricating oil, or issuing a warning that the lubricating oil level is low even though there is sufficient oil remaining in the lubricating oil tank. There is a risk that the operating section that operates accordingly may malfunction.

Therefore, the present applicant has proposed a separate lubricating device as described in Japanese Unexamined Patent Application Publication No. 59-217095 in order to prevent malfunction of the operating section. This separation lubrication device is
Detects by turning on a mercury switch attached to the outboard motor body that the outboard motor body is in a critical tilt state where the detection result of the oil level detector should be ignored in order to prevent malfunction of the operating part. When this mercury switch is in the ON state, the operation of the operating section is stopped.

[Invention or problem to be solved]

Here, the critical inclination state of the outboard motor body differs depending on the specifications of the outboard motor. In other words, the FI field inclination state depends on: ■ the shape of the outboard motor body, ■ the mounting position of the lubricating oil tank with respect to the outboard motor main body, ■ the shape of the lubricating oil tank, and ■ the mounting position of the oil level detector in the lubricating oil tank. Varies depending on various specifications such as

For this reason, conventional separate lubrication systems have a critical slope characteristic unique to each outboard motor, depending on the specifications of the outboard motor. It is necessary to adjust the mounting position of the mercury switch so that the mercury switch is turned on when B is lowered. However, adjusting the mounting position of the mercury switch requires mechanical adjustment such as changing the mounting position, which is complicated.

SUMMARY OF THE INVENTION An object of the present invention is to prevent malfunction of an operating section that operates in response to a change in the oil level in a lubricating oil tank under a critical tilting state of an outboard motor main body with a simple configuration.

[Means for Solving the Problems] The present invention provides a lubricating oil tank that is attached to an outboard motor body that is supported so as to be tiltable from a normal position with respect to a mounting bracket I-- that is attached to the hull, and a lubricating oil tank. In a separate lubrication system for an outboard motor, the outboard motor has an oil level detector capable of detecting a change in the oil level within the outboard motor, and an operating section that operates according to the detection result of the oil level detector. The tilt angle of the main body relative to its normal position is detected by a trim angle detector, and the operation of the actuating part is stopped when the detected value of the trim angle detector reaches a predetermined critical tilt angle. be.

[Function] In the present invention, the trim angle detector detects whether the outboard motor body is tilted or is in a critical tilt state in which the detection result of the oil level detector should be ignored in order to prevent malfunction of the operating section. It is detected based on the detected value, and the operation of the actuating section is stopped based on the detection result.

At this time, according to the present invention, the critical inclination angle predetermined in advance as a comparison standard for the detected value of the trim angle detector is simply electrically adjusted for each specification of the extrauterine machine (for example, adjusting the reference voltage of the judgment circuit). ), it is possible to reliably detect that the tilting state of the outboard motor body has reached its critical tilting state for outboard motors of various specifications.

That is, with a simple configuration, it is possible to prevent malfunction of the actuating section that operates in response to changes in the oil level in the lubricating oil tank under a critical tilting state of the outboard motor main body.

[Embodiment No. 11'A is an overall view showing one embodiment of the present invention, FIG. 2 is a sectional view showing a lubricating oil tank, FIG. 3 is an electric circuit diagram showing a lubricating oil pumping operation part, and FIG. 4 is a sectional view showing an example of the rim angle detector 1 to rim angle detector, and FIG. 5 is a schematic diagram showing the operating state of the trim angle detector.9 In FIG. 11A, fix the clamp bracket 12 as a mounting bracket, and attach the clamp bracket 1-1 to
A swivel bracket 14 is tiltably supported at 2 via a tilt shaft 13. The swivel bracket 14 has
A propulsion unit 15 is rotatably supported around a steering shaft. +(The engine 16 is located on the top of the advance unit 15.
Propulsion: Propeller 1 is installed at the bottom of Lnit 15.
7 is provided. A cylinder device filo1 as a trim device is interposed between the clamp bracket 12 and the swivel bracket 14. Cylinder device 101
consists of a cylinder 102 that is coupled to a clamp bracket 12 and a piston rod 103 that is coupled to a swivel bracket 14.

That is, in this embodiment, the propulsion unit 15 is tilted ( It is possible to sail with the aircraft trimmed up.

A carburetor 19 and an intake box 20 are connected to the crank chamber of each cylinder in the engine 16 via an intake manifold 18.
is connected. Further, fuel in a fuel tank 21 installed in the hull 11 can be supplied to the carburetor 19 by a fuel pump (not shown).

On the other hand, the lubricating oil that can lubricate the engine 16 is
It is stored in a relatively large-capacity main tank 22 installed in the main tank 1. The lubricating oil in the main tank 22 is
A pump 23 fixed to the engine 16 is capable of sucking up water through a suction pipe 24 and a pumping pipe 25 to a sub-tank 26 fixed to the upper side of the engine 16. The sub-tank 26 constitutes a lubricating oil tank in the present invention, and the lubricating oil in the sub-tank 26 is allowed to flow into a lubricating pump 28 fixed to a lower part of the sub-tank 26 on the side of the engine 16 via a suction pipe 27. There is.

The lubrication pump 28 is driven by the rotation of the crankshaft of the engine 16, and pressure-feeds the lubricating oil introduced from the sub-tank 26 through the suction pipe 27 to the intake manifold 18 of each cylinder through each discharge pipe 29, and pumps the lubricating oil into the air-fuel mixture. It can be discharged to The lubricating oil mixed in the intake manifold 18 and discharged into the air lubricates various parts of the engine and then is burned and consumed.

Here, the sub-tank 26 is constructed as shown in FIG. That is, on the side surface of the sub-tank 26 on the ceiling side,
A connection port 3o to which the pumping pipe 25 is connected is formed, and a connection port 31 to which the suction pipe 27 is connected is formed at the bottom of the sub-tank 26. Note that even when the propulsion unit 15 fills the sub-tank 26 with lubricating oil and is delved under the condition that the propulsion unit 15 is set at any steering angle position, lubricating oil may infiltrate into a part of the ceiling of the sub-tank 26. A check valve installation chamber 32 that maintains a space that is free from leakage is formed protrudingly, and the check valve installation chamber 32 forming portion of the sub-tank 26 includes:
A check valve 33 that opens when lubricating oil is pumped up and a check valve 34 that opens when lubricating oil is supplied to the lubrication pump 28 are provided to maintain the space inside the sub-tank 26 at atmospheric pressure at all times.
Smooth driving of the pumping pump 23 and the lubricating pump 28 is attempted.

The sub-tank 26 has an oil level set therein, that is, a full oil level 35A and a replenishing oil level 35B, and also has an oil level detector 36 built therein. The oil level detector 36 includes a stopper 3 fitted into an opening 37 provided in the ceiling of the sub-tank 26.
8, a cylindrical portion 39 that hangs down from the bottom surface of the stopper 38 to near the bottom of the sub-tank 26, and a plurality of flow holes 40 that allow the lubricating oil to flow, so as to cover the entire length of the cylindrical portion 39. A housing 41 fixed to the plug body 38 and the cylindrical portion 39, a float 42 that moves up and down in the ring-shaped space between the cylindrical portion 39 and the housing 41 according to changes in the oil level, and a Reed switches 43A and 43B installed at each level corresponding to the surface level, and a magnetic link 44 fixed to the float 42 and located at the same level as the actual oil level, which turns on each reed switch 43A and 43B. It is configured. That is, the oil level detector 36 detects each reed switch 43 according to the change in the oil level in the sub tank 26.
By turning on A and 43B, it is possible to perform a pumping operation which will be described later. The float 42 comes into contact with the lower surface of the stopper 38 at its upper limit position, making it possible to maintain the ON state of the reed switch 43A.

Here, there is a limit t! between the sub-tank 26 and the lubricating pump 28 on the side of the engine 17. [45 is fixed;
The pumping operation in this embodiment can be controlled by the electric circuit shown in FIG. In addition, in Figure 3, 4
6 is a battery, 47 is a power switch, 48 is a pumping motor as an operating part in the present invention, 49 is a flip-flop circuit (bistable multivibrator), 50 and 51
are transistors, 52 to 55 are resistors, and 56 and 57 are diodes. Further, the terminal P1 is connected to the side opposite to the battery 46 of the power switch 47.

The pumping operation by the oil level detector 36 and control box 45 is as follows. That is, when the oil level in the sub-tank 26 falls from the full oil level 35A due to consumption of lubricating oil and reaches the replenishment oil level 35B, the float 42 also falls, and the magnetic ring 44 turns on the reed switch 43B. The ON signal of the reed switch 43B changes the flip-flop circuit 49 in the control box 45 to a zero potential output state and turns off the transistor 5o.
1 is turned on, the pumping motor 48 of the pumping pump 23 starts driving, and the lubricating oil in the main tank 22 is pumped up into the sub tank 26.

When the pump 23 starts pumping, the float 42 and the magnetic link 44 rise, causing the leak switch 4 to rise.
Although 3B is turned off again, flip-flop circuit 4
The zero potential output state of No. 9 does not change, and the pumping motor 48 of the pumping pump 23 continues to drive. The flow rate of the lubricating oil pumped up by the pump 23 is set to be larger than the maximum consumption amount of lubricating oil consumed by the engine 17.

Therefore, the oil level in the sub-tank 26 rises and the full oil level 3
It reaches 5A. At this time, the float 42 also rises in accordance with the rise in the oil level, and the magnetic link 44 changes the reed switch 43A or ONL, the flip-flop circuit 49 to a positive potential output state, and turns on the transistor 50. The transistor 51 is turned off, the pumping motor 48 is stopped, and pumping of lubricating oil is stopped.

If the lubricating oil is consumed after the pump 23 stops pumping, the magnetic ring 44 of the float 42 will descend and the reed switch 43A will be turned OFF again, but the positive potential output state of the flip-flop circuit 49 will remain unchanged. No change, the pumping motor 48 is maintained in its stopped state.
By repeating the pumping operation described above, the lubricating oil in the sub-tank 26 can be maintained between the full oil level 35A and the supply oil level 35B.

Here, this embodiment includes a trim angle detector 58 that detects the trim angle of the propulsion unit 15 with respect to the clamp bracket 12 attached to the hull 11. The trim angle detector 58 is connected to a stopper 59 as shown in FIGS. 4 and 5.
a housing synchronizer 0 fixed to the clamp bracket 12 by a rotary shaft 61 that penetrates inside and outside the housing 60 and arranged parallel to the tilt shaft 13;
A contact 63 is provided at the end of the rotating shaft 61 located inside the housing 60 and slidably contacts the resistance plate 62 with a predetermined contact pressure;
and a link 67 which is rotatably connected to the swivel bracket 14 by a set screw 65 and connected to the link 64 by a pin 66. That is, the detector 58 is capable of detecting the inclination angle of the propulsion unit 15 with respect to the clamp bracket 12 using a potentiometer system, and the propulsion unit 15 with respect to the clamp bracket 12 is also connected to the rotation shaft 61 that rotates when the swivel bracket 14 is tilted. A voltage corresponding to the trim angle of the propulsion unit 15 with respect to the clamp bracket 12 is outputted by the sliding position of the integrated contact 63 with respect to the resistance plate 62 .

Furthermore, in this embodiment, as shown in FIG. 3, the output voltage of the trim angle detector 58 is applied to a judgment circuit 70 provided within the control box 45. The TJI disconnection circuit 70 corresponds to a critical inclination angle of the propulsion unit 15, which is a critical inclination state in which the detection result of the oil level detector 36 should be ignored in order to prevent malfunction of the pumping motor 48. A predetermined reference voltage is applied. Therefore, the judgment circuit 70 compares the output voltage of the trim angle detector 58 with the reference voltage, and determines that the detected value of the trim angle detector 58 reaches a predetermined critical tilt angle as shown in FIG. Transistor 7] is turned on.

Therefore, according to the above embodiment, due to the presence of the trim angle detector 58, the propulsion unit 15 travels in a tilt-up and trim-up state, and an abnormal oil level change in the sub-tank 26 occurs due to a change in the travel attitude. , the float 42 is lowered and the reed switch 43Bl? : Even when turning on, the transistor 51 is turned off by turning on the trim angle detector 58.
By maintaining the FF state and keeping the pumping motor 48 in a stopped state, overflow of lubricating oil due to excessive pumping into the sub tank 26 can be prevented.

Next, the operation of the above embodiment will be explained.

In the embodiment described in 2, the tilted state of the propulsion unit 15 is detected by the oil level detector 36 in order to prevent malfunction of the pumping motor 48.
It is detected from the detection value of the trim angle detector 58 that the trim angle detector 58 is in a critical inclination state in which the detection result of 1 should be ignored, and the operation of the pumping motor 48 is stopped based on this detection result.

At this time, according to the above embodiment, the critical inclination angle predetermined as a comparison standard for the detected value of the trim angle detector 58 is
By simply electrically adjusting (adjusting the reference voltage of the judgment circuit 70) for each specification of the outboard motor 10, it is possible to reach the tilting state of the propulsion unit 15 or its critical tilting state for the outboard motors 10 of various specifications. It is possible to reliably detect what has happened.

That is, with the simple configuration, it is possible to prevent malfunction of the pumping motor 48 that operates in response to changes in the oil level in the sub-tank 26 when the propulsion unit 15 is in a critical tilt state.

Note that the present invention is not limited to stopping the operation of the pumping motor 48, but can also be used, for example, to stop the operation of a buzzer that detects a decrease in the remaining amount in the sub-tank 26 and issues a warning. It can also be applied to the case of stopping the operation of other operating parts.

[Effects of the Invention] As described above, according to the present invention, the simple structure prevents the malfunction of the actuating part that operates in response to changes in the oil level in the lubricating oil tank when the outboard motor body is in a critical tilt state. can be prevented.

[Brief explanation of drawings]

Fig. 1 is an overall view showing one embodiment of the present invention, Fig. 2 is a sectional view showing a lubricating oil tank, Fig. 3 is an electric circuit diagram showing a lubricating oil pumping operation section, and Fig. 4 is a trim angle. FIG. 5 is a cross-sectional view showing an example of the detector, and a schematic diagram showing the operating state of the trim angle detector. DESCRIPTION OF SYMBOLS 10... Outboard motor, 11... Hull, 12... Clamp bracket lj5... Propulsion unit, 26... Sub tank, 36... Oil level detector, 48... Pumping motor, 58... Trim angle detector, 70... Judgment circuit. Agent Patent Attorney Osamu Shiokawa Figure 4 Figure 5

Claims (1)

[Claims] (1) A lubricating oil tank attached to the outboard motor body that is supported so as to be tiltable from a normal position with respect to a mounting bracket attached to the hull, and an oil that enables detection of displacement of the oil level within the lubricating oil tank. In a separate lubrication system for an outboard motor that includes a surface detector and an actuator that operates according to the detection result of the oil level detector, the inclination angle of the outboard motor body relative to the normal position is determined by the trim angle detector. A separate lubrication device for an outboard motor, characterized in that the separation lubrication device for an outboard motor is configured to stop the operation of an operating part on condition that a detected value of a trim angle detector reaches a predetermined critical inclination angle.