JPS60229894A - Elevating device for outboard motor - Google Patents

Abstract

PURPOSE:To enables a piston to be firstly lowered to separate a trim rod from a bracket even if the bracket makes contact with the trim rod, by a method wherein a down motion on the trim cylinder side is increased over that on the tilt cylinder side. CONSTITUTION:When a liquid pressure pump 9 feeds liquid by a pressure to a passage 10 through a passage 11 by means of down motion, a liquid pressure in a trim cylinder upper chamber 7e is lower by a specified pressure P1 than a pump pressure with the aid of a pressure reducing valve 22 located to a flow pass 21 running to the trim cylinder upper chamber 7e, and a liquid pressure in a tilt cylinder upper chamber 6b is lower by a specified pressure P2 with the aid to a valve 12f. If the specified pressures are set to P1>P2, the depressing force of a tilt piston 6c is increased over that of a trim piston 7d, the tilt side is firstly lowered, and even if a down bracket makes contact with a trim cylinder, the trim piston is prevented from being separated from the bracket.

Description

[Detailed Description of the Invention] [Subject of the Invention] The present invention relates to an elevating device for an outboard motor, and more particularly, to a lifting device for an outboard motor in order to adjust the propeller fsI advance angle of the outboard motor in water. This relates to a trim device.

[Prior art]

Conventionally, in this type of device, a swivel bracket is pivoted to a clamp bracket fixed to the hull, an outboard motor is supported by the swivel bracket, a hydraulically operated trim soling is fixed to the clamp bracket,
The swivel bracket was configured to be directly pushed by the piston operation of the trim ring.

When you want to change the propulsion angle of the propeller, the reversible morph and hydraulic pump in the device move the liquid from one side pipe (down example) to the other side pipe (down example) according to the desired direction of change.
(up side) or vice versa.

[Problems in the prior art and their technical analysis] In the prior art device described above, when a down operation is performed in the case of a lightweight outboard motor, the tilt piston (tl': 1) shifts from the trim piston (1
There was a delay in the work, rather than in the original work.

This means that in addition to the relative pressure difference between the upper and lower chambers of both pistons, there is also a difference in dynamic resistance between each piston and the rod due to their construction, and this difference is reflected in the trim example. This is due to the fact that the side is smaller than the chill i side. In this way, ]・Trim piston rod)
If the outboard motor goes down first and the thrust load of the outboard motor is suddenly applied in that state, the trim rod will hit the outboard motor's receiver, causing a large shock, causing inconvenience in operation, and also preventing function maintenance. This also had an unfavorable effect on durability.

[Technical issues]

In this application, the down operating force on the tilt silling side is made larger than the down force on the trim silling side, and the tilt piston (rod) is trimmed (downed earlier than the rule) in order to prevent the above-mentioned inconvenience. It is something that

[Technical means]

The present invention solves the above problems by the following means,
Ta. That is, a passage was established from the hydraulic piston to the upper chamber of the trim sill, and a pressure reducing valve was installed within the passage.

(2) A check valve was provided in parallel with the pressure reducing valve to allow flow from the upper chamber of the trim sill to the hydraulic pump side.

(3) Another check valve was installed to allow liquid to flow from the reservoir to the passageway between the pressure reducing valve and the upper chamber of the trim sill.

[Effect of technical means]

The pressure reducing valve of the above-mentioned means of the present invention generates a downward force caused by the hydraulic pressure of the trim piston, and the check valve installed in parallel with the pressure reducing valve discharges the liquid in the upper trim chamber to the pump side when the trim piston is raised. .

In addition, when the above-mentioned another check valve is operated down by manual operation (when the manual valve is opened and the pump does not rotate), liquid is sucked from the rim 1 chamber helical inlet, and the reservoir becomes Wm. to prevent (Without this check valve, the reservoir would rise to the operating pressure of the pressure reducing valve).

[Special effects produced by the present application]

The downward force of the tilt piston is greater than that of the trim screw 1, so even if the tilt side goes down first and the bracket hits the trim rod 1, the rim piston goes down first and the trim rod' will not separate from the bracket. do not have.

Therefore, the above-mentioned object of the present application can be easily achieved.

To achieve this objective, it is possible to increase the diameter of the trim rod and reduce the pressure-receiving area of the upper chamber of the trim piston to reduce the downward force, but with this method, the trim piston will be lowered by 1. As a result, fluid level fluctuations in the reservoir become large.

Therefore, there is a drawback that it is necessary to increase the pressure resistance or capacity of the reservoir.

In the present application, the problem can be effectively dealt with simply by providing a pressure reducing valve through which a small flow rate passes, and the configuration can be made compact, which is advantageous.

[Embodiments] Hereinafter, embodiments of the apparatus of the present invention will be described with reference to the attached FIGS. 1 to 4.

[ is the stern plate (hull), and the clamp Shiraken 1-2 is fixed by appropriate means. A swivel bracket 3 is pivotally attached to the clamp bracket 2 via a shaft 4, and an outboard motor 5 is attached to and supported by the swivel bracket 3.

In order to raise the propeller 5a of the outboard motor 5 above the water surface or put it into the water depending on whether the boat is in use or not, a hydraulically operated tilt is provided between the clamp bracket 2 and the swivel bracket 3 as is well known. A cylinder 6 is provided (FIG. 2).

The tilt cylinder 6 has its cylinder 6a pivoted to the clamp bracket 2, and its piston rod 6b pivoted to the swivel bracket 3 (FIGS. 1 and 2).

Further, a hydraulically operated trim cylinder 7 is installed for adjusting the propulsion angle of the outboard motor propeller 5a while the boat is running. This trim cylinder tough, Norinda 7a
is fixed to the clamp bracket 2 or is formed integrally with the clamp bracket 2, and the piston rod 7b is configured to abut against the ring part of the swivel socket 3.

Next, the hydraulic system shown in the first diagram will be explained.

Reference numeral 8 denotes a reversible electric motor whose (♀stop/rotation and direction of rotation) are controlled by the operator of the ship.A reversible hydraulic pump 9 driven by this electric motor 8 is connected to a passage 10 according to its rotation direction.
to the passageway 11 or vice versa. The hydraulic pressure sent from the passage 10 to the passage 11 by the operation of the hydraulic pump 9 enters the chamber 12b on the left side of the free piston 12a of the switching valve 12, and forces the open valve 12c against the spring 12d.
C is pushed open and enters the passage 13, and enters the lower hydraulic pressure chamber 6a of the tilt cylinder 6 through the passage 13, and at the same time enters the trim cylinder 7.
enters the decompression chamber 7c. Free piston 12 of switching valve 12
Both chambers 12b and 12e of a are jffi tracts 11 and 10
Therefore, from the passage 11 to the chamber 12b
When the pressure fluid is fed under pressure, the free piston slides upward in the figure to push open the valve 12'' against the spring 12g, and the liquid in the upper hydraulic chamber 6b of the tilt no cylinder 6 flows into the passage 14 and the switching light I2. through which it can flow into passageway lO.
When the hydraulic pump 9 pumps liquid from the passage 11 to the passage 10, the pressure liquid in the passage 10 enters the chamber 12C of the switching valve 12, pushes the valve 12 open against the spring 12g, and passes through the passage 14. It enters the upper hydraulic pressure chamber 6b of the tilt cylinder 6. Then, the free piston 12a of the switching valve 12 slides downward (in the figure) due to the pressure difference on both sides, and the valve 12c
is pushed open against the spring 12d, and the liquid in the lower hydraulic pressure chamber 6a of the tilt cylinder 6 and the hydraulic pressure chamber 7C of the trim cylinder 7 can flow into the passage 11 through the passage 13 and the switching valve 12. The springs 12d and 12g of the switching valve 12 act as a valve 12c when the hydraulic pump 9 is stopped.

12f are set to close respectively.

In order to prevent negative pressure from building up in the channel 10.11 during operation of the hydraulic pump, the channel 10.11 is connected to the reservoir 18 via a check valve 15.16. In addition, in order to prevent the hydraulic line from the hydraulic pump 9 to the tilt cylinder 6 and trim cylinder 7 from being damaged due to an abnormal increase in hydraulic pressure, the passage 10 is connected to the ζ reservoir 18 via a down relief valve 17. , Tilt Norinda 6 F
The force development chamber 6) is connected to the reservoir 18 via an up-relief valve 19.

When an obstacle such as driftwood hits the outboard motor 5 while the boat is moving forward, the swivel bracket 3 and the outboard motor 5 will swing in one direction around the shaft 4 as shown in Figure 2. In order to prevent damage to the outboard motor 5, and to automatically return the swivel racket 3 and the outboard motor 5 to their original positions due to the weight of the outboard motor 5 and its propulsive force, As is well known, a damping valve 6d and a check hull pro (.

Furthermore, in order to manually swing the swivel bracket 3 and the outboard motor 5 by 1η in the event of a failure of the electric motor 3, the upper hydraulic pressure chamber 6b of the chill I cylinder 6 is connected via a check valve I9. It is connected to the reservoir 18 via a manual valve 20 and to the T-side I&pressure chamber 6a.

The lower regular chamber 7c of the piston 7d of the trim cylinder 7 is connected to the reservoir 18.

Next, the U of the propeller 5a of the outboard motor 5 while the boat is running.
The t-advanced angle adjustment effect will be explained.

When the boat is moving forward, the propulsive force based on the operation of the propeller 5a of the outboard motor is shown in Figure 2.
It works to rotate around axis 4 in the direction of the ζ hour hand.
This force applied to the swivel bracket 3 is transmitted to the piston rod F7b of the rim cylinder 7, and the piston 7d of the trim cylinder 7 is pressed diagonally downward in FIG.

In parallel with this, the piston 6r of the tilt cylinder 6 is also pressed downward as seen in FIG. However, under normal conditions when the hydraulic pump 9 is stopped, the valves 12c and I of the switching valve 12
2f is closed, the up-relief valve 19 is not opened, and the manual valve 20 is also closed, so the liquid in the hydraulic pressure chamber 7c of the trim cylinder 7 and the lower hydraulic pressure chamber 6a of the tilt cylinder 6 is in the sealed normal state. Then piston 7+1,6f is rubbed! f)
is Im+l, the rotation of the slave swivel bracket 3 and the outboard motor 5 is prevented, and the propulsion angle of the propeller 5a remains unchanged at M.

When it is desired to change the propulsion angle of the propeller 5a, a hydraulic pump 9 is driven by the ζ motor 8 to pump liquid from the passage 10 to the passage 11 or vice versa, depending on the direction in which the propulsion angle is changed. Let's go. In the former case, when the Zunawara hydraulic pump 9 pumps liquid from the passage 10 to the passage 11, the pressure liquid in the passage 11 passes through the switching valve 12 and the passage 13 to the cylinder 6.
The lower hydraulic chamber 6;1 and the hydraulic chamber 7c of the trim cylinder 7
supplied to

As a result, the piston 7d of the trim cylinder 7 tries to move upward in FIG. 1 and diagonally downward in FIG. This is transmitted to the bracket 3 and attempts to rotate the swivel bracket 3 upward in FIG. Moreover, at this time, the liquid in the upper hydraulic chamber 6b of the tilt cylinder 6 is in a state where it freely flows out into the passage 10 via the passage 14 and the switching valve 12 due to the operation of the switching valve 2. The free piston 6 system attempts to move integrally in the ζ1 direction in FIG. Trying to move. The six rotational forces applied to the swivel bracket 3 by the trim cylinder 7 and tilt cylinder 6 are designed to overcome the rotational force applied to the swivel bracket 3 by the operation of the outboard motor 5. Due to the cooperative action of both cylinders 6.7, the swivel bracket 3 is rotated upward in the same manner as shown in FIG. 2, and the propulsion angle of the propeller 5a of the outboard motor 5 is changed.

Next, in the down operation, the hydraulic pump 9 moves from the passage 11 to the passage 10.
When the outboard motor is in the position shown by the chain line in FIG. The liquid pressure in the chamber 7e is lower than the pump pressure by the specified pressure P.
1 lower and tilt cylinder 1 chamber 6b is valve 12f
Although the current constant pressure ξ is low, by setting P, > P2, the pushing force of the tilt piston 6c becomes ]・Reno,
It is larger than that of the piston 7d. Therefore, even if the tilt side goes down first and the bracket hits the trim cylinder as described above, the rim piston (1, l) will not separate from the bracket. Also, during the up operation, the liquid in the trim sill upper chamber 7e is discharged from the ζJ check valve 23 to the pump 9 (J
It is discharged to the 111 circuit. When operating manually at 7,
Liquid flows into the trim sill upper chamber 7e from the reservoir 18 through the check valve 124, thereby preventing pressure rise in the reservoir.

FIG. 3 shows another embodiment of the pressure reducing valve 22 shown in FIG. 1 and the check valve 23 arranged in parallel thereto, in a U7 female.

In this embodiment, the pressure reducing valve and check valve shown in the first figure are integrated in series, and are built into the upper end of the body of the trim cylinder.

That is, 107 is a trim cylinder, 107a is a communication port to the upper chamber of the trim cylinder, and 107b is a connection port with the first illustrated passage 21.

101 is a valve, and this valve has a stepped through hole 102.
Kaset+J Rahle. I 03LL: Ij-Rute*Jfr
Large diameter portion 102 of ITLI02. It is configured to fit into the small hole I and sit on the end surface 102b. Further, a radial through hole 102c is formed in the enlarged diameter 102a, and a pin 104 is press-fitted into the end portion to prevent the hole 103 from falling off. The outer diameter conical surface 105 of the valve 101 is pressed against the toilet seat portion 106 of the body 107 by a spring +08. Incidentally, reference numeral 109 is a screw for adjusting the spring 108.

FIG. 4 shows another embodiment of the arrangement of only check valves. A stepped hole 201 is provided at a suitable location on the upper end of the trim cylinder body 10, and a ball 202 is inserted into the large diameter portion of the stepped hole 201. The ball 202 is configured to sit in the small diameter hole 201a. A groove 203 is provided on the inner surface of the trim sill, and is located near the center of the stepped hole. A ring 204 is placed in this groove 203 to prevent the ball 202 from falling off, and is screwed into the body 107 in a fluid-tight manner. It is held by a stopcock 205 that

Incidentally, the stepped hole small diameter portion 201a is connected to the passage 21 (FIG. 1).

1*J rj;ii Section-'P-'/'-K gView J Figure 1 is an explanatory diagram of the implementation of the hydraulic system of the apparatus of the present invention, and Figure 2 is an explanatory diagram of the external appearance of the equipment in Figure 1. , 3rd and 4th FA indicate implementation examples different from those shown in the first diagram.

2... Krumph Brake Soto, 3... Sui, Lubra Kerato, 5... Outboard Motor, 6... Chill) Schilling, 7
...1-rim cylinder, 9. ・Hydraulic pump, 12.
...Switching valve, 21...Passage.

22...Pressure reducing valve, 23...Check valve, 24...Check valve Patent applicant 1. Reito Nakai, Representative of Iren Seikin Waikishiki Company

Claims (1)

[Claims] (11) A clamp bracket fixed to the hull, a swivel bracket pivoted to the clamp bracket and supporting an outboard motor, and a hydraulically operated trim sill operatively connected to the swivel bracket. A lifting device for an outboard motor comprising a passage communicating from a hydraulic pump to an upper chamber of the trim sill, and a pressure reducing valve disposed within the passage. A lifting device for an outboard motor that includes a clamp bracket to be fixed, a swivel bracket that is pivoted to the clamp bracket and supports the outboard motor, and a hydraulically operated trim sill that is operatively connected to the swivel bracket. A lifting device for an outboard motor, comprising a passage communicating from a pressure pump to an upper chamber of the trim sill, and a pressure reducing valve and a check valve for discharging liquid in the upper trim chamber when the trim piston rises in the passage. (3) An outboard motor comprising a clamp bracket fixed to the hull, a swivel bracket pivoted to the clamp bracket and supporting the outboard motor, and a hydraulically operated trim sill operatively connected to the swivel bracket. In the lifting device, a passage communicating from the hydraulic pump to the upper chamber of the trim sill is provided, and a pressure reducing valve, a torino, and an inverse ratio valve for discharging the liquid in the upper trim chamber when the piston rises are provided in the passage, and An elevating device for an outboard motor, which includes a check valve in a passage leading from the reservoir between the pressure reducing valve and the upper chamber of the trim sill, which allows liquid to flow from the reservoir. (4) Claim 2. The pressure reducing valve and check valve described in 2.1 are an outboard motor lifting device in which both of these valves are integrally arranged in series and built into the upper part of the body of the trim sill. (5) Scope of Claims A 'j?tl!' device for an outboard motor, which comprises a check valve that allows liquid to flow from the reservoir as described in item 3 and is built into the upper part of the body of the trim sill.