JPH0270596A - Tilt lock device for outboard motor - Google Patents

Abstract

PURPOSE:To provide a function for reducing the load in a tilt-up operation in addition to a basic function by a simple structure by providing a check valve at a first communicating passage and storing operating gas together with operating liquid as operating fluid stored in the first and second chambers in a cylinder. CONSTITUTION:The upper casing of the title device is fittingly supported at a hull through a clamp bracket and a swivel bracket. A piston 12 is connected to the inner end of a rod 11 and slidably fitted into a cylinder 8 dividing the inside of the cylinder 8 into two chambers, that is, a first chamber 8a to expand when the rod 11 retreats and a second chamber 8b to be compressed inversely, and both these chambers form a storage part of operating fluid. The first chamber 8a is stored with the above mentioned inactive gas 10 and oil 9, and the second chamber 8b is stored only with the oil 9. The number of parts can be decreased by the disuse of a gas cylinder.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a tilt lock system for an outboard motor.

(Prior Art) An outboard tilt lock device must satisfy the following basic functions.

That is, first of all, the outboard motor must be kept in a locked state so that it does not jump up due to the thrust generated as the propeller rotates when going in reverse.

Second, during deceleration or braking, the outboard 1 must be kept in its latched state so that it does not jump up due to water resistance.

Third, when the outboard motor collides with an obstacle such as driftwood while driving, the latching state is automatically released to avoid displacement of the outboard motor and prevent damage.

Fourthly, when performing a so-called tilt-up operation to raise the outboard motor for running in shallow water or landing, the latched state can be released.

However, the conventional tilt lock device uses many links and springs to satisfy the above-mentioned basic functions, but has a large number of latching mechanisms, unnecessarily increasing the number of parts and making the structure complicated.

In addition, the outboard motor, which has been lowered to a nearly vertical position, can be chilled.
When raising the boat, a fairly large tilt-up VI@ is applied due to the weight of the outboard motor, making it difficult to perform the delta thrust operation.

Furthermore, as mentioned above, when the outboard motor collides with an obstacle such as driftwood while driving, the impact force is so great that there is a risk of damage to the outboard motor. It is desirable that the impact force be alleviated as effectively and reliably as possible.

(Problems to be Solved by the Invention) The present invention was made in view of the above circumstances, and its object is to simplify the basic functions of the tilt lock device and the function of reducing the load when performing a tilt-up operation. It is to make the cat laugh with the structure.

In addition, the problem addressed by claim 2 is that the outboard motor hits an obstacle such as driftwood while driving! The objective is to effectively and reliably alleviate the two forces.

Furthermore, the problem addressed by claim 3 is to stabilize the operation of the valve mechanism by preventing the working gas from entering the communication path.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the tilt lock device for an outboard motor according to claim 1 is provided by attaching and supporting the outboard motor main body with a clamp bracket that is hooked and attached to the hull. a swivel bracket that is pivotally supported to be able to move up and down relative to the clamp bracket; a cylinder that is rotatably supported on one side and accommodates a working fluid; and the remaining one of the two brackets that is inserted into and out of the cylinder. a rod rotatably supported by the rod; a first chamber connected to the inner end of the rod, slidably fitted into the cylinder, and expanding inside the cylinder when an external force is applied to the rod in the direction of withdrawal; The second compressed inversely
The piston is disposed in a first communication passage that is one of a plurality of communication passages that communicate between the first chamber and the second chamber, and the piston is arranged in a first communication passage that communicates between the first chamber and the second chamber. A check valve is provided in a communication path other than the first communication path to prevent movement of working fluid from the second chamber to the first chamber, and opens when the pressure in the second chamber increases beyond a predetermined level. A valve mechanism is provided for switching between a state of preventing the movement of the working fluid and a state of allowing the movement of the working fluid. It contains a working gas together with a working liquid.

Further, the tilt lock device according to the second aspect includes a valve body that is seated on a valve seat and opens the valve toward the first chamber side, and a switching operation that moves the valve body between a valve opening side and a valve closing side. The operating member and the valve body are supported while being pressed in the seating direction with a predetermined pressure, and when the pressure in the second chamber rises above a predetermined level, the valve body is passively moved in the valve opening direction by the pressure. The valve mechanism is constructed from a valve support that is retracted automatically.

Roughly speaking, in the tilt lock device according to the third aspect of the present invention, the opening at the end of the communication passage is arranged closer to the working liquid side than the range of variation of the boundary between the working gas and the working liquid in the housing portion of the cylinder.

(Example) An example of carrying out the present invention will be described with reference to the drawings. In FIG. 1, (△) is a hull, (B) is an outboard motor, (b) is an outboard motor body, and (1) is a propeller.

The outboard motor main body (b) is composed of an upper casing (bl) and a lower casing (bl), and the upper casing (bl) is connected to the hull (A) via a clamp bracket (2) and a swivel bracket (3). Mounted and supported.

Both brackets (2) and (3) are shown enlarged in FIGS. 2 and 3.

The clamp bracket (2) is fixed so as to fit onto the stern (a>upper end portion) of the hull (A) and clamp it from the inside and outside.

Reference numeral (4) denotes a plurality of insertion holes drilled in the lower part of the clamp bracket (2) at intervals in the front and back, into which pins (5) are selectively inserted.

On the other hand, the upper end of the swivel bracket (3) is rotatably supported on the upper part of the clamp bracket (2), and is loosely fitted inside the bracket (2). The upper casing (b) is attached and fixed.

Therefore, the outboard 1 (B) is rotatable about the fulcrum of the swivel bracket (3).

(6) is a locking part formed in the lower front edge of the swivel bracket (3), and the swivel bracket (3) is locked to the pin (5) through this locking part (6); Rotation forward, that is, toward the hull (A) side is restricted.

Therefore, when moving forward, the outboard motor (B) uses its thrust to
) side, the above swivel bracket (
3) is locked to the pin (5), thereby restricting its movement.

Furthermore, by replacing the pin (5) with another insertion hole (4), the locking position of the swivel bracket (3) is changed, and the mounting angle of the outboard 1 (B) is changed accordingly.

(7) is a locking lever rotatably supported on the upper part of the swivel bracket (3), and is bent into an L-shape.

The lower end of this locking lever (7) is engaged with the upper edge of the clamp bracket (2) when the swivel bracket (3) rotates upward as the outboard t1 (B) is pulled up, and the lower end of the locking lever (7) is engaged with the upper edge of the clamp bracket (2). ) to maintain the raised state of the outboard 11(B).

(8) is a cylinder rotatably mounted and supported on one of the brackets (2) and (3), for example, the swivel bracket (3), into which the rod (11) and piston (12) are fitted. are shown enlarged in FIGS. 4 to 6.

The cylinder (8) contains oil (9) therein as a working fluid, and an inert gas (10) such as nitrogen gas is sealed above and in contact with the oil (9).

The rod (11) is inserted into and out of the cylinder (8), and its outer end is rotatably attached to and supported by the remaining one of the brackets (2) and (3), that is, the clamp bracket (2). .

The piston (12) is connected to the inner end of the rod (11) and is slidably fitted into the cylinder (8).
There are two chambers inside: a first chamber (8a) that expands when the beating rod (11) leaves, and a second chamber (8b) that compresses in the opposite direction.
It is divided into two chambers (8a) and (8b), and these chambers (8a) and (8b) constitute a working fluid storage section.

The first chamber (8a) contains the inert gas (10) and oil (
9) is accommodated, and the second chamber (8b) accommodates only oil (9).

As described above, by using the upper part of the first chamber (8a) in the cylinder (8) to store the inert gas (10), for example, a gas cylinder that stores the inert gas (10) can be used. Compared to a valve that is provided separately, the number of valve parts can be reduced since the gas cylinder is not required.

(13) <14) is a passage formed in the piston (12), which communicates the two chambers (8a) and (8b).

(15) (16) are the passages (13) (14)
It is a check valve installed in each passage (13) (14
), the oil (9) is allowed to flow in only one direction.

One of them, the check valve (15) on the left in FIG. 4, opens when the pressure in the second chamber (8b) rises above a predetermined level, allowing oil ( The valve seat (9) is formed in the middle of the passage (13).
17) and a corresponding spherical valve body (29).

19) is connected to the main body (18) via the support member (20).
When the pressure in the second chamber (8b) increases more than the spring force of this spring (19), the valve body (18) opens and closes the check valve (15). is now open.

The remaining check valve (16) on the right side in FIG. 4 allows oil (9) to flow from the first chamber (8a) to the second chamber (8b), and the check valve (15) Similarly, the valve seat (2
1) and a valve body (22).

(23) is a spring that maintains the valve body (22) in the closed state, and its spring force is set to be weaker than that of the spring (19).

(24) is a communication passage that bypasses the piston (12) and connects the first chamber (8a) and the second chamber (8b), and is integrally formed on the outer circumference of the cylinder (8) along its axial direction. It is formed.

This communication passage (24) has a small passage (25) at its lower part.
It communicates with the second chamber (8b) through the passageway (26), and communicates with the first chamber (Sa) through the small passageway (26) at the upper part.

The above-mentioned small passage (26) is an opening at the end of the communication passage (24), and its opening position is located at the outboard 1 (
B) When the rod (11) is pulled up to the limit τ, the inert gas (10) expands and tilts.
and the oil (9) side, that is, in this case, lower than the boundary between J3 and the oil (9).
) is prevented from entering the inert gas (10).

In addition, the communication path (24) is connected to the cylinder (8) using a vibrator or the like.
) may be formed separately.

In the middle of the communication path 24), there is a communication path (24).
An opening/closing device is provided for opening and closing the cylinder, and in the illustrated example, a switching valve (27) that is opened and closed by a manual switching operation from outside the cylinder (8) is used as the opening/closing device.

(28) is a valve chamber formed between the small passage (26) on the side of the first chamber (8a) and the upper end of the communication passage (24), and accommodates a spherical valve body (29).

The valve body (29) corresponds to the valve seat (30) and is biased in the valve closing direction by a spring (31).

A bottle (29) is used as means for opening and closing the valve body (29).
32), a cam (33), and an operating mechanism consisting of an operating shaft (34).

One end of the bottle (32) engages with the valve body (29), and the other end engages with the outer periphery of the cam (33).

The cam (33) has a notch (33a) on its outer periphery, and is fixed to the operating shaft (34) so as to rotate together therewith.

The operating shaft (34) protrudes to the outside of the cylinder (8) and can be rotated from the outside.

The operating shaft (34) is rotated by remote control via a lever or wire, etc., and the switching valve (27) is rotated by remote control.
) may be made to be able to be opened and closed.

(35) is a spherical body that presses into engagement with the negative side of the cam (33) via a spring (36), and allows the rotation of the cam (33) by the operation shaft (34) to have a D degree.

Therefore, in the above opening/closing mechanism, the bottle (32>) is connected to the cam (33).
By engaging with the notch (33a) of the valve body (29
), and the valve body (29) is displaced away from the spring (31
), the switching valve (27>) is closed.

Then, from this state, by rotating the operation 'm (34) to rotate the cam (33), the bottle (32) is moved from the notch (33a) of the cam (33) to a part with a larger diameter. The vehicle rides on the vehicle and pushes the valve body (29) to open it, opening the switching valve (27).

The operation of such a tilt lock device is shown in FIGS. 7 to 11.

First, FIG. 7 shows a case where the outboard motor (B) is held in the locked state during normal running.

In this case, the rod (11) enters the cylinder (8) to the maximum extent, the piston (12) is positioned upward, and the first chamber (8a
) are narrowed and the switching valve (27) is closed.

In this state, the inert gas in the first chamber (8a) is compressed,
This compensates for the increase in volume due to the entry of the rod (11).

Then, when a force is applied to the outboard 1 (B) due to the Jlt force during reverse movement in a state of refusal, the rod (11) attempts to exit from the cylinder (8) and the second? ? The pressure in (8b) increases, but with this level of pressure increase, the check valve (15) does not open and the communication passage (24) is closed, so the oil (9) in the second chamber (8b) 1st
There is no flow to chamber (8a).

Therefore, the exit of the rod (11) is regulated and the outboard tl(
The locked state of B) is maintained.

Similarly, even during deceleration or braking, the outboard 111(B) does not jump up and maintains its locked state.

Next, Figures 8 and 9 show how to release the latched state of the outboard motor (B) when traveling in shallow water or landing.

In this case, the switching valve (27) is operated to switch the communication passage (24).
)hear.

Therefore, when a tilt-up operation is performed to pull up the outboard 11 (B), the rod (11) retreats from the cylinder (8), the piston (12) is displaced downward, and the second
The chamber (8b) is reduced in size and the oil (9) in the chamber (8b) flows into the first chamber (8a) via the communication passage (24).

Before the tilt-up operation, the outboard 1 (B) is in a state of pushing up the piston (12) toward the first chamber through the piston (11) and compressing the inert gas (1o). Then, as described above, by tilting up the
When l(PI) is pulled up, the inert gas (
The repulsive force generated by 10) acts in the direction of retracting the rod (11), thereby reducing the load when pulling up the outboard motor (13) itself, making it possible to perform the tilt-up operation accordingly.

Furthermore, when the rod (11) is withdrawn from the cylinder (8) due to a tilt-up operation, the first
The inert gas (10) in the chamber (8a) expands to compensate for the volume reduction.

Then, as shown in Fig. 8, connect the outboard 1 (B) to the rod (11
), the oil in the second chamber (8b) (
9) flows into the first chamber (8a), and the inert gas (10) in the first chamber (8a) further expands, but this inert gas (10) is prevented from flowing into the communication path (24). The communication path (
The small passage (26) in 24) is opened below the boundary between the expanded inert gas (10) and the oil (9), so that the inert gas (10) flows through the communication passage (24).
This prevents the on-off valve (27) from becoming unstable due to contamination.

Furthermore, when the switching valve (27) is closed and the outboard 1 (B) is released in the state shown in Fig. 8, the oil (9) will not flow from there because the communication passage (24) is closed. , outboard 11 (B
)'s own weight acts on the rod (11) in the direction of entry, causing the force to move upward in the first chamber (8a).

Then, due to the pressure increase in the first chamber (8a), the check valve (16) opens, and the oil (9) in the first chamber (8a) flows into the second chamber (8b), causing the rod (11 ) is the cylinder (8)
Go inside.

Therefore, if this continues, the outboard 1 (B) will rotate downward, so in order to maintain the raised state of the outboard IEI (B), move the locking lever (7) to the push bracket (2) as described above. so that it is engaged.

Next, FIG. 10 shows a case where the outboard motor (B) is automatically released from the latched state when it collides with an obstacle such as driftwood.

In this case, the outboard motor (B
) is subjected to an impact, a force acts on the rod (11) in a direction that causes it to withdraw.

Since this force is very large, the EE force in the second chamber (8b) increases significantly.

As the pressure in the second chamber (8b) increases, the check valve (15) opens and the oil (9) in the second chamber (8b) flows into the first chamber.

As a result, the rod (11) moves out of the cylinder (8) and the outboard 1 (B) jumps up, the impact is alleviated and the outboard 1 (B), that is, the lower casing (1) z ) which is a member that exists underwater. damage is prevented.

Next, after the rain shock is released, the check valve (15) closes as shown in Fig. 11, but in this state, the weight of the outboard motor (B) acts on the rod (11). The pressure in the first chamber (8a) increases, and the check valve (16) opens accordingly.
The oil (9) in the chamber (8a) flows into the second chamber (8b).

As a result, the rod (11) enters the cylinder (8) and the outboard 1 (B) returns to its original state as shown in FIG.

Next, in the second practical example shown in FIGS. 12 to 14, the switching valve (24) is opened by switching the communication passage (24).
37), and a passageway (13>) that fits into the end of the piston (12) on the first chamber (8a) side of J3
A movable wall (49) is provided to cover (14).

The switching valve (31) is the first. Second two valve chambers (39) (4
0) and two valve bodies (4) provided in each of its valve chambers (39) (40) and corresponding to the valve seats (41) (42), respectively.
3) (44).

ff'l i'+L m 1 (1) Valve chamber (39 >Hashi')>ri (8) Inner (1) The second valve chamber (40) communicates with the 712 chamber (8b) and the gas chamber (38) The tank (45) and the first chamber (8a) in the cylinder (8) communicate with each other.

The valve bodies (43) <44> are connected via a connecting member (4G), and are respectively connected to the valve body (44) of the second Bentaka (40) by springs (47) loaded on the back. It is supported in a state where it is biased in the valve closing direction.

The spring force of this spring (47) (and the spring force of the check valve (15))
1) are set equal to or higher than the above.

The spring (47) marked -lx is connected to the oil (9) from the second chamber (8b) to the first chamber (8a) within the range of its spring horn.
), and at the same time, when the pressure in the second chamber (8b) rises above a predetermined level, it is compressed by the pressure and retreats toward the first chamber (8a), causing the valve body (44) to move. The valve is opened to allow oil (9) to move from the second chamber (8b) to the first chamber (8a).

(48) is an operating shaft for switching operation that faces the first valve chamber (39) so as to be freely forward and backward, and is configured to push the valve bodies (43) and (44) to open the valve.

In this embodiment, as shown in FIG. 12, by closing the switching valve (37), the flow of oil (9) is regulated and the outboard motor (B) is kept in a stopped state. Ru.

On the other hand, when the switching valve (37) is opened and the outboard 1 (B) is pulled up as shown in FIG.
8) and leave the inert gas (10) in the second chamber (8b).
flows into the first chamber (8a) via the communication path (24),
Together with the inert gas (10) contained therein, it accumulates below the movable wall (49). If the switching valve (31) is closed in this state, that is, while the outboard Bff (B) is being pulled up, the flow of oil (9) from the communication passage (24) is regulated, and the flow of oil (9) into the first chamber (8a) is restricted. Inert gas (10
) the movable wall (49) is held in a fitted state with the piston (12).

Therefore, from the passage (14) to the check valve (16), the first chamber (8
Since the pressure in a) is not applied, the check valve (16) opens -f
, the flow of oil (9) from the first chamber (8a) to the second chamber (8b) is regulated, and the outboard motor (B) can be reliably held in the desired pulled-up state.

On the other hand, if the outboard 1 (8) collides with an obstacle, the check valve (15) opens as the pressure in the second chamber (8b) increases, and the pressure in the second chamber (8b) increases. is the communication path (24
), and if the spring force of the spring (47) is equivalent to the spring (19) of the check valve, then with the increase in pressure in jurisprudence (39) Valve body (44)
opens.

Therefore, the oil (9) in the 'X52 chamber (8b) is
2) flows into the first chamber (8a) through both the passage (13) and the communication passage (24).

In addition, if the spring force of the spring (47) is set larger than the spring (19), the outboard In (B) receives a shock greater than the force that opens the check valve (15). At this time, after opening the check valve (15), l71a of the valve body (44)
Accordingly, the switching valve (37) opens and the oil (9) also flows out from the communication passage (24), thereby mitigating the impact in two stages.

Further, as described above, the check valve (15) opens as the pressure in the second chamber (8b) increases, and the oil (9) in the second chamber flows into the first chamber (8b).
8a) and pushes down the movable wall (49).

As a result, the latching state of the outboard fl (B) is released, and the oil (9) and inert gas (10) are mixed in the first chamber (8a) below the movable wall (49). Fit.

Note that the cylinder (8) described above is configured to be installed with the first chamber (8a) facing down, so the first chamber (8a)
) The opening at the end of the communication path (24) connected to the first chamber (8a
) is located closer to the oil (9) than the boundary between the inert gas (10) and the oil (9), that is, in this case, at the bottom of the first chamber (8a). (8a) The inert gas (10) contained in the upper part is connected to the communication path (24)
This is to prevent large groups from entering the group.

Next, the third embodiment shown in FIG. 15 has almost the same structure as the second embodiment. Active gas (10)
This is because they are housed in compartments.

The movable wall (50) is connected to the first
The range of movement within the chamber (8a) toward the second chamber (8b) is restricted to a range below the communication position of the end of the communication path (24).

That is, the movable wall (50) mechanically separates the boundary between al+ (9) and the inert gas (1o) in the first chamber (8a), and the movable wall (50) serving as the boundary
), the inert gas (1o) expands to the position where the end of the communication path (24) communicates with the first chamber (8a). The flow of the inert gas (10) into the communication path (24) is completely regulated.

In addition, the above-mentioned 1. In both of the second embodiments, the communication passage is located on the b-ura (9) side of the boundary physically caused by the difference in specific gravity between the inert gas (10) and the oil (9) in the first chamber (8a). (24) prevents a large amount of inert gas (10) from flowing into the communication path (24), but as described above, the first chamber (8a)
A movable wall (
50), even when the first chamber (8a) is compressed, the oil (9) and the inert gas (10) will not mix with each other, thereby reducing the influence of inert gas (10) mixing. is totally improved.

Furthermore, since the inert gas (10) is completely partitioned by the movable wall (50) as described above, it is possible to take pictures when the outboard 1 (B) collides with driftwood or the like while traveling. However, oil (
9), the check valve (15) and the switching valve (37) are always stable without variations in their mitigation characteristics depending on the number of collisions. Demonstrates impact-reducing properties.

Incidentally, the relaxation characteristics of the above-mentioned check valves and switching valves change depending on the magnitude of viscous friction that occurs when oil containing air bubbles passes through those valves, and the degree of relaxation is greatly influenced by the state of gas bubbles. The reason why the valve opening relaxation characteristic is stable in a state where gas bubbles are not mixed is because the unstable element caused by gas bubbles is removed.

Therefore, the operation of the third embodiment is such that when the outboard motor (B) is pulled up, the switching valve (37) is closed, so that the movable wall (49) can control the oil (9) in the first chamber (8a). The outboard 1 (B) can be held in a raised state by being held by the handlebars, and the other operations are the same as in the second example.

(Effects of the Invention) Since the tilt lock device for an outboard motor according to the first aspect of the present invention is configured as described above, it produces the effects described below.

■ The first communication passage is equipped with a check valve that opens when the pressure in the second chamber in the cylinder rises above a specified level, so it does not receive back thrust loads within the range that occurs during normal driving. This prevents the outboard motor from jumping up during sudden deceleration, while at the same time, in the event of a collision with an obstacle such as driftwood, the pressure in the second chamber is released from the check valve to the first chamber. This allows the outboard motor to be lifted up, and the shock generated at that time can be alleviated.

■ Since the first and second chambers in the cylinder contain working fluid and working gas, when the valve mechanism is opened and the working fluid can move through the communication path, The working gas contained in the first chamber of the cylinder is compressed by the piston to which the weight of the outboard motor is applied via the rod. Therefore, when performing a tilt-up operation to pull up the outboard motor located below, the repulsive force due to the compressed working gas acts in the direction of retracting the rod as described above, and the tilt-up load is reduced by that amount, so the tilt-up You can easily perform up operations.

■ The working fluid and working gas storage area is located in the first part inside the cylinder.
Since it is configured with a chamber and a second chamber, the number of parts can be reduced by eliminating the need for a gas storage cylinder, compared to, for example, a system in which a working gas storage section is provided separately from the cylinder.

■ As a working fluid, a working gas is stored in a cylinder together with a working liquid, and this cylinder, a rod inserted into it, a check valve, and a valve mechanism are used to lock and release the outboard motor, and to handle tilt lock loads. Since the present invention is designed to reduce the number of tilt-lock carts, it is possible to provide the basic functions of a tilt-lock device as well as the function of reducing the number of tilt-lock carts with a simple configuration.

In the tilt lock device of claim 2, when the second chamber rises above a predetermined level while the valve body of the valve mechanism is in the closed state, the valve body passively retreats in the valve opening direction due to the pressure. It is something that moves people. Therefore, when the outboard motor collides with an obstacle such as driftwood and the pressure in the second chamber suddenly increases, the working fluid in the second chamber is added to the check valve and the valve 'a mechanism also flows into the first chamber. This allows the outboard motor to quickly jump up and the impact force at that time to be more effectively alleviated.

In the tilt lock device according to claim 3, since the upper side opening of the communication path is disposed closer to the working liquid than the range of variation of the boundary between the working gas and the working liquid in the housing portion of the cylinder, the rotation of the swivel bracket is Regardless of the pulling position of the outboard motor2 or the compressed state of the working gas, which changes with the movement of the outboard motor, the upper side opening of the connecting passage is always located in the working liquid to prevent the working gas from getting mixed into the connecting passage. This can stabilize the operation of the check valve and valve mechanism.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the device of the present invention, FIGS. 2 and 3 are enlarged side views of the device, FIG. 4 is an enlarged sectional view of the cylinder, and FIG. Line rIfi plane view, No. 61
i1hajlT511iM) (V7> -(Vl) Line 1
1N side view, FIGS. 7 to 11 are explanatory diagrams of the operation of the device, FIGS. 12 to 14 are schematic diagrams showing the second embodiment, and FIGS.
The figure is a schematic diagram showing a third embodiment. In the diagram (B)... 11m outboard (b)... Outboard motor body (A)... Hull (2)... Clamp bracket (3)... Swivel bracket... Cylinder (8a)...First chamber...Second chamber (9)...Oil (working liquid)...Inert gas (
Working gas)...Rod (12)...Piston...Passage (first communication passage) (16)...Check valve (37)...Switching valve (valve mechanism) (44)...・Valve body...Spring (valve support member)...Operation shaft (operation member)

Claims (1)

[Claims] 1. A clamp bracket that is hooked and attached to the hull, and a swivel bracket that attaches and supports the outboard motor body and is pivotally supported so as to be movable up and down with respect to the clamp bracket. a freely supported cylinder containing a working fluid;
a rod that is inserted into and out of the cylinder and rotatably supported by the remaining one of the brackets; A piston partitioned into two chambers, a first chamber that expands when an external force in the withdrawal direction is applied to the piston, and a second chamber that compresses in the opposite direction, and a plurality of pistons that communicate between the first chamber and the second chamber. A check valve that is disposed in a first communication passage, which is one of the communication passages, prevents movement of working fluid from the second chamber to the first chamber, and opens when the pressure in the second chamber rises above a predetermined level. and a valve mechanism provided in a communication passage other than the first communication passage for switching and selecting a state in which movement of the working fluid from the second chamber to the first chamber is prevented and a state in which movement is permitted, A tilt lock device for an outboard motor, in which a working gas is accommodated together with a working fluid as a working fluid in a working fluid storage section consisting of a first chamber and a second chamber. 2. A valve body that seats on the valve seat and opens toward the first chamber side;
An operating member that performs a switching operation to move the valve body between the valve opening side and the valve closing side, and an operation member that supports the valve body while pressing it in the seating direction with a predetermined pressure, and when the pressure in the second chamber is above a predetermined value. Claim 1: The valve mechanism is constituted by a valve support that passively moves the valve body toward the valve opening direction by the pressure when the pressure rises.
Tilt lock device for the outboard motor described. 3. The tilt lock device for an outboard motor according to claim 1 or 2, wherein the opening at the end of the communication passage is arranged closer to the working liquid side than the range of variation of the boundary between the working gas and the working liquid in the housing portion of the cylinder.