JPH04232193A - Tilting device of outboard motor - Google Patents

Abstract

PURPOSE:To install a tilt cylinder device while an outboard bracket is made compact by installing a pump unit for driving the tilt cylinder device at a position more inboard from a stern plate of a clamp bracket. CONSTITUTION:An outboard motor 10 is supported so that a swivel bracket 14 may be tilted up and down through a tilt shaft 13 provided between the top ends of a pair of right and left clamp brackets 12 fixed to a stern plate 11. Also, a propulsion unit 16 is supported steerably on the swivel bracket 14 through a steering shaft 15, and a tilt cylinder device 19 is provided between the clamp bracket 12 and the swivel bracket 14. In this case, a pump unit 20 for driving the tilt cylinder device 19 is fixed at a position inboard from the stern plate 11 of the clamp bracket 12. Thus the tilt cylinder device 19 can be installed while the outboard brackets 12 and 14 are made compact.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt device for an outboard motor.

0002

2. Description of the Related Art Conventionally, there is a tilting device for an outboard motor as described in Japanese Utility Model Application Publication No. 59-164805. In this prior art, a tilt cylinder device is interposed between a clamp bracket and a swivel bracket, and a pump unit is disposed outside the boat.

According to this prior art, there is no pump unit in the space between the clamp bracket and the swivel bracket, and only the tilt cylinder device is disposed, so that the outboard bracket can be made more compact.

0004

[Problems to be Solved by the Invention] However, in the conventional technology, since the pump unit is placed outside the ship, the following
■There is a problem.

[0005] ■ There is a risk that the pump unit may be damaged or corroded.

[0006] The pump unit cannot be attached or detached from the hull together with the outboard motor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tilt cylinder device while making the outboard bracket more compact, improve the protection and corrosion resistance of the pump unit, and make the pump unit removable from the hull together with the outboard motor. shall be.

[0008]

[Means for Solving the Problems] The present invention provides a clamp bracket fixed to a stern plate, a swivel bracket tiltably supported on the clamp bracket and supporting a propulsion unit, and a space between the clamp bracket and the swivel bracket. In a tilt device for an outboard motor that includes a tilt cylinder device that is installed in the engine, and a pump unit that drives the tilt cylinder device, the pump unit is positioned inside the boat from the stern plate of the clamp bracket. It is fixed.

[0009]

[Operation] According to the present invention, the tilt cylinder device is interposed between the clamp bracket and the swivel bracket, and the pump unit is fixed at a position inside the ship from the stern plate of the clamp bracket. It has an effect.

[0010] Since there is no pump unit in the space between the clamp bracket and the swivel bracket and only the tilt cylinder device is disposed, the outboard bracket can be provided with the tilt cylinder device while making it more compact.

[0011] Since the pump unit is placed inside the ship, protection and corrosion resistance of the pump unit are improved.

[0012] Since the pump unit is fixed to the clamp bracket, the pump unit can be attached to and detached from the hull together with the outboard motor.

[0013]

[Embodiment] Fig. 1 is a side view showing a first embodiment of the present invention, Fig. 2 is a front view of main parts of Fig. 1, Fig. 3 is a hydraulic circuit diagram, and Fig. 4 is a schematic diagram showing a second embodiment of the invention. Figures 5 and 5 are hydraulic circuit diagrams.

(First embodiment) The outboard motor 10 has a stern plate 11
A pair of left and right clamp brackets 12 are fixed to the swivel bracket 14, and the swivel bracket 14 is tilted up via the tilt shaft 13 spanned between the upper ends of both clamp brackets 12.
A propulsion unit 16 is supported on the swivel bracket 14 via a steering shaft 15 so as to be steerable. The propulsion unit 16 can drive a propeller 18 with the output of an upper engine unit 17.

The outboard motor 10 has a tilt cylinder device 19 interposed between the clamp bracket 12 and the swivel bracket 14, and a pump unit 20 for driving the tilt cylinder device 19 is connected to the stern plate 11 of the clamp bracket 12. It is fixed in a position closer to the inside of the ship.

The tilt cylinder device 19 has a cylinder 22 pivotally connected to a pin 21 extending between the lower ends of both clamp brackets 12, and a piston 2 inserted into the cylinder 22.
3 rod 24 to the pin 25 on the swivel bracket 14 side.
It is pivoted to. The cylinder 22 is divided into an upper chamber 26A and a lower chamber 26B by a piston 23, and a free piston 27 is disposed in the lower chamber 26B. And piston 23
A shock absorbing valve 28 and a check valve 29 are interposed in each of the two passages connecting the upper chamber 26A and the lower chamber 26B.

The pump unit 20 is fixed to a mounting portion 12A provided on one of the clamp brackets 12 with bolts 30, and is disposed within a gap between both clamp brackets 12. As shown in FIGS. 1 to 3, the pump unit 20 integrally includes a pump 31, a motor 32, and a reservoir 33, as well as a main on-off valve 34, relief valves 35, 36, 37, check valves 38, 39, and a manual valve. It has built-in 40.

The manual valve 40 is provided at a position facing into the ship, and can be easily operated from inside the ship.

The tilt cylinder device 19 and the pump unit 20 are connected through an upper chamber side pipe line 41 and a lower chamber side pipe line 42.

Here, the tilt up and down operations by the tilt cylinder device 19 are as follows.

When the pump 31 rotates forward by the motor 32, the oil discharged from the pump 31 flows through the check valve 34 of the main on-off valve 34.
A is opened to connect the lower chamber side pipe 42 to the lower chamber 26 of the cylinder 22.
B, the rod 24 is extended and the propulsion unit 16
Tilt up. At this time, the oil in the upper chamber 26A returns to the pump 31 from the upper chamber side conduit 41 through the check valve 34C opened by the piston 34B of the main on-off valve 34.

On the other hand, when the pump 31 is reversed by the motor 32, the oil discharged from the pump 31 opens the check valve 34C of the main on-off valve 34 and is sent from the upper chamber side pipe line 41 to the upper chamber 26A of the cylinder 22. The rod 24 is retracted to tilt down the propulsion unit 16. At this time, the oil in the lower chamber 26B returns to the pump 31 from the lower chamber side conduit 42 through the check valve 34A opened by the piston 34B of the main on-off valve 34.

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

According to the above embodiment, the tilt cylinder device 19 is interposed between the clamp bracket 12 and the swivel bracket 14, and the pump unit 20 is fixed at a position inside the ship from the stern plate 11 of the clamp bracket 12. Therefore, it has the following effects.

■Since there is no pump unit 20 in the space between the clamp bracket 12 and the swivel bracket 14 and only the tilt cylinder device 19 is disposed, the tilt cylinder device 19 can be provided while making the outboard brackets 12 and 14 more compact. be able to.

(2) Since the pump unit 20 is placed inside the ship, protection and corrosion resistance of the pump unit 20 are improved.

(2) Since the pump unit 20 is fixed to the clamp bracket 12, the pump unit 20 can be attached to and removed from the hull together with the outboard motor 10.

(Second Embodiment) The second embodiment differs from the first embodiment in that not only a tilt cylinder device 19 is interposed between the clamp bracket 12 and the swivel bracket 14, but also a tilt cylinder device 19 is provided between the clamp bracket 12 and the swivel bracket 14. As shown, the trim cylinder device 51 is also interposed. The trim cylinder device 51 includes a pin 5 spanned between the lower ends of both clamp brackets 12.
A cylinder 53 is pivotally attached to the swivel bracket 14, and a rod 55 of a piston 54 inserted into the cylinder 53 is brought into contact with the swivel bracket 14 so as to be able to move toward and away from the swivel bracket 14. cylinder 5
3 is divided by a piston 54 into an upper chamber 56A and a lower chamber 56B.

Further, the pump unit 20 is mounted on the stern plate 11 of one clamp bracket 12, as in the first embodiment.
It is fixed to a mounting part 12A provided at a position closer to the inside of the ship, and as shown in FIG.
, a reservoir 63, and a main on-off valve 64 and relief valves 65 and 66 are built-in.

The tilt cylinder device 19 and the pump unit 20 are connected through an upper chamber side pipe 67, and the trim cylinder device 51 and the pump unit 20 are connected through an upper chamber side pipe 68 and a lower chamber side pipe 69. The tilt cylinder device 19 and the trim cylinder device 51 are connected to the lower chamber side pipe line 7.
Contacted by 0.

Here, the tilt up and down operations by the tilt cylinder device 19 and trim cylinder device 51 are as follows.

When the pump 61 rotates forward by the motor 62, the oil in the reservoir 63 is supplied to the pump 61 through the pipe 80, and the oil in the upper chamber 26A is supplied through the upper chamber side pipe 67 as described below. is supplied to the pump 61. The oil discharged from the pump 61 opens the check valve 64A of the main on-off valve 64 and is sent from the lower chamber side pipes 69 and 70 to the lower chambers 26B and 56B of each cylinder 22 and 53, causing the rods 24 and 55 to extend. to tilt up the propulsion unit 16. At this time,
The oil in the upper chamber 26A returns to the pump 61 from the upper chamber side conduit 67 through the check valve 64C opened by the piston 64B of the main on-off valve 64. The oil in the upper chamber 56A is transferred to the upper chamber side conduit 6.
8 and returns to the reservoir 63.

Note that after the rod 55 of the trim cylinder device 51 reaches the maximum extension position, only the rod 24 of the tilt cylinder device 19 extends at a faster speed, tilting the propulsion unit 16 to a larger tilt angle position. It is possible to upload.

On the other hand, when the pump 61 is reversed by the motor 62, the oil discharged from the pump 61 opens the check valve 64C of the main on-off valve 64 and is sent from the upper chamber side pipe line 67 to the upper chamber 26A of the cylinder 22. The rod 24 is retracted to tilt down the propulsion unit 16. At this time, the lower chambers 26B, 56
The oil B returns to the pump 61 from the lower chamber side pipes 69 and 70 through the check valve 64A opened by the piston 64B of the main on-off valve 64. A portion of the oil discharged by pump 61 returns to reservoir 63 through conduit 80 . Also, rod 5
5 comes into contact with the swivel bracket 14 and is pushed down.

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

According to the above embodiment, as in the first embodiment, the tilt cylinder device 19 is interposed between the clamp bracket 12 and the swivel bracket 14, and the stern plate 11 of the clamp bracket 12 is connected to the interior of the ship. Since the pump unit 20 is fixed in the position shown in FIG.

[0037]

As described above, according to the present invention, the outboard bracket can be made compact and equipped with a tilt cylinder device, and the protection and corrosion resistance of the pump unit can be improved. It can be attached and detached.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a first embodiment of the present invention.

FIG. 2 is a front view of the main part of FIG. 1;

FIG. 3 is a hydraulic circuit diagram.

FIG. 4 is a schematic diagram showing a second embodiment of the present invention.

FIG. 5 is a hydraulic circuit diagram.

[Explanation of symbols]

10 Outboard motor 11 Stern board 12 Clamp bracket 14 Swivel bracket 16 Propulsion unit 19 Tilt cylinder device 20 Pump unit

Claims (1)

[Claims] 1. A clamp bracket fixed to a stern plate, a swivel bracket tiltably supported by the clamp bracket and supporting a propulsion unit, and a tilt cylinder device interposed between the clamp bracket and the swivel bracket. and a pump unit for driving a tilt cylinder device, wherein the pump unit is fixed to a position inside the boat from the stern plate of the clamp bracket. Tilt device for external engine.