JPS6037908Y2 - Hydraulic coupling for power tilt device - Google Patents

Description

[Detailed description of the invention] This invention is a power tilt device that uses a hydraulic cylinder to tilt up an outboard propulsion unit in an inboard/outboard motor, etc., and is designed to install a hydraulic joint that connects the hydraulic piping inside the ship and the hydraulic piping outside the ship. is about structure.

In recent years, as inboard/outboard motors have become more sophisticated or larger, some models have appeared in which a hydraulic cylinder is used to tilt up the propulsion unit or to slightly tilt up the trim angle for shallow water navigation.

In this case, the hydraulic cylinder is naturally placed outside the ship like the propulsion machine, but in that case, piping is required to lead hydraulic fluid from the hydraulic pump inside the ship to the hydraulic cylinder outside the ship.
A joint is required at the transom of the hull to connect the pipes inside and outside the hull.

Conventionally, such hydraulic joints have a drilled hole formed in the transom plate that supports the propulsion unit, and are connected through this drilled hole, but in this structure, the drilled hole is directly connected to the transom plate, which is a large aluminum casting. Since it is processed, it has the disadvantage of poor pressure resistance.

Furthermore, as shown in Japanese Patent Application Laid-Open No. 57-209491, there is a type in which a hydraulic joint (closing member) is disposed on the lower side of the transom plate (stern plate).

In this prior art, the hydraulic joint portion is located below the tilt center of the outboard motor.

However, in general, in ships equipped with this type of outboard propulsion device, the water surface when the vessel is stopped is approximately at the same position as the transmission shaft that transmits power to the outboard propulsion device.

Therefore, the hydraulic joint portion is always located below the water surface, which poses problems such as poor maintenance, such as inconvenience of retightening the piping attachment portion, and easy corrosion by seawater.

Moreover, it is structurally difficult to arrange the hydraulic cylinder on the upper side of the hull.

The present invention was made in order to solve such problems, and the present invention has been made to solve the above problems, and the hydraulic cylinder 9 arranged on the upper side of the hull 2 is connected to the hydraulic pipes 13, 14 inside the ship and the hydraulic pipes 11 .14 outside the ship.
12 is formed separately from the transom plate 1, and is arranged above the pivot 5 for tilting and rotating the front external propulsion unit 7.

Hereinafter, the configuration of the present invention will be explained in more detail based on an illustrated embodiment.

In FIG. 1, 1 is a ransom plate attached to a transom 3 of a hull 2, and a hanging bracket 4 protrudes from the middle of the transom plate 1 through a pin 5 that constitutes a pivot point at the tip. The upper end of the swivel fork 6 is pivotally connected, and the propulsion device 7 is connected to the swivel fork 6.
It is supported by the lower end of the holder so as to be able to swing left and right, and is also tiltable in the vertical direction about the pin 5 as the center of tilt.

8 is an L-shaped tilt bracket which is pivotally pivoted upward using the same pin 5 as the swivel fork 6;
The upper end of the tilt bracket 8 is pivotally connected to the rod tip of a hydraulic cylinder 9 which is pivotally connected to the upper end of the transom 3 in a suspended state.
As shown in FIG. 2, a left-right tilt rod 10 is attached to the back surface of the swivel fork 6.

That is, the tilt bracket 8 rotates its upper end downward by supplying hydraulic pressure to the hydraulic cylinder 9.
The tilt rod 10 at the lower end pushes down the swivel fork 6, thereby tilting up the propulsion device 7.

In the figure, reference numeral 11 denotes a rising pipe on the outboard side whose outlet end is connected to the bottom side of the hydraulic cylinder 9, and 12 indicates a descending pipe on the outboard side that is also connected to the rod side of the hydraulic cylinder 9. 13 is a rising pipe on the inside of the ship connected to a hydraulic pump inside the ship, and 14 is a descending hydraulic pipe.

Next, the transom plate 1, as shown in FIG.
It has a slightly upwardly elongated polygonal shape, and an opening 15 is formed in the center thereof, located above the pin 5 at the tip of the hanging bracket 4, as shown in FIG. A hydraulic joint 16 is fitted and attached from the outside, and each pipe 11, 12, inside and outside the hull is connected via this hydraulic joint 16.
13° and 14 are connected.

In this case, as shown in FIG. 1, the pin 5 is placed at approximately the same height as the transmission shaft 24 placed on the inside of the ship, so that the water surface will be near this area when stopped. Therefore, the hydraulic joint 16 and the hydraulic pipe 11.1 interposed between the hydraulic joint 16 and the hydraulic cylinder 9
2 will be located above the water surface.

As shown in FIGS. 4 to 6, the hydraulic joint 16 has a horizontally long hexagonal shape, and has the opening 1 on the back surface of the plate-like main body 17.
Bolt holes 19 with fitting convex portions 18 formed on the left and right sides of the bolts.
is fixed to the transom plate 1 via the
A rearward bulge 20 is formed on the other surface, and both left and right side surfaces of this bulge 20 are formed into inclined surfaces 21.21,
Two upper and lower outlet side communication holes 22 a and 22 b are formed in the inclined direction from each of these inclined surfaces 21 .

Among these communication holes 22.22, the upper communication hole 22
The outboard rising pipe 11 is connected to a, and the descending pipe 12 is also connected to the communication hole 22b on the lower side, and the hydraulic cylinders 9 are arranged on the left and right. However, since the connection surface is inclined and the communication holes 22a and 22b are diagonally formed, connection with the left and right pipes is easy.

In addition, these left and right communication holes 22a, 22b, 22a, 2
2b communicate with each other at the center.

On the other hand, on the back side of the hydraulic joint 16, two inlet side communication holes 23a and 23b are formed, and one of these inlet side communication holes 23at23b is connected to the rising piping 13 inside the ship, and the other 23b is connected to the rising pipe 13. , also descending pipe 1 inside the ship
4 are connected to each other, and each of them is connected to the above-mentioned exit side rising communication hole 22.
a and the lowering communication hole 22b.

As described above, according to the present invention, by arranging the hydraulic joint for piping above the pivot for tilting and rotating the outboard propulsion device, it is possible to prevent the hydraulic joint from being connected to the hydraulic cylinder located at the upper side of the hull. In addition, these hydraulic joints and piping parts are always located above the water surface, which improves maintenance efficiency by making it easier to retighten the piping attachment parts and replace the piping. Corrosion is now prevented.

Moreover, since the outboard piping is always above the water surface, there is an advantage that it is not damaged by floating objects.

In addition, since the hydraulic joint is provided separately on the transom plate, there is no need to provide a drill hole in the transom plate, and there is no problem with pressure resistance, and even if the hydraulic joint requires high-strength material, The transom plate can use conventional inexpensive materials and has the advantage of being low cost.

Note that, as described above, if the left and right outlet side communication holes are formed at an angle, it is easy to connect the outboard piping to the left and right hydraulic cylinders.

[Brief explanation of drawings]

Figure 1 is an overall side view of the propulsion unit equipped with a power tilt device, Figure 2 is an enlarged front view of the left half of the device seen from the rear side of the transom plate, and Figure 3 is a further enlargement of the main parts. A side view, FIG. 4 is a front view of the hydraulic joint, FIG. 5 is a sectional view taken along the line A--A in FIG. 4, and FIG. 6 is a rear view of the hydraulic joint. 1...Transom plate, 2, curve, hull, 7
...... Propulsion machine, 9... Hydraulic cylinder, 1
1,12,13.14...Hydraulic piping, 15...
Opening between, 16...Hydraulic joint.

Claims (1)

[Scope of utility model registration request] In a vehicle in which a hydraulic cylinder is provided outside the boat and the outboard propulsion unit is tilted up by this hydraulic cylinder, the hydraulic pressure of the hydraulic cylinder located on the upper side of the boat connects the hydraulic piping inside the boat and the hydraulic piping outside the boat. A hydraulic joint for a power tilt device, characterized in that the joint is formed separately from a transom plate and placed above a pivot for tilting and rotating the outboard propulsion device.