JPH11321789A - Oscillating device of propulsion unit in outboard motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outboard motor having a simple constitution and to make an operation light and easy in oscillating a propulsion unit constituting the outboard motor. SOLUTION: An outboard motor is provided with a propulsion unit 8 vertically oscillatably supported on a clamp bracket 6 mounted at a rear portion of a ship body 2; a hydraulic tilt cylinder 23 provided between the clamp bracket 6 and the propulsion unit 8 and can be telescopically operated; and a pressure oil supplying means 40 which supplies pressure oil to the tilt cylinder 23 to operate the tilt cylinder 23. The pressure oil supplying means 40 is provided with a hydraulic pump 41 capable of supplying the pressure oil to the tilt cylinder; and an operating means 43 connected to the hydraulic pump 41, inputs an operating force from a person through an operated portion 42 and transmits the operating force to the hydraulic pump 41 to drive the hydraulic pump 41. The operated portion 42 is disposed at inside or above the ship body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion unit swinging device in an outboard motor in which the vertical swing of a propulsion unit pivotally supported at the rear of a hull is controlled by a hydraulic tilt cylinder. is there.

[0002]

2. Description of the Related Art Conventionally, a swinging device for a propulsion unit in an outboard motor has the following structure.

[0003] That is, an outboard motor is provided with a clamp bracket attached to the rear of the hull, a propulsion unit disposed behind the clamp bracket and pivotally supported by the clamp bracket so as to be vertically swingable, The tilt cylinder is provided between the bracket and the propulsion unit, and is provided with a hydraulic tilt cylinder that can be extended and contracted, and a pressure oil supply unit that supplies pressure oil to the tilt cylinder to operate the tilt cylinder. In addition, the pressure oil supply means includes:
A hydraulic pump capable of supplying pressure oil to the tilt cylinder and an electric motor for driving the hydraulic pump are provided.

[0004] The propulsion unit has a propeller at its swinging end, and when the outboard motor is used for propulsion of the ship, the propulsion unit has a posture in which the swinging end is located below the water surface ( Hereinafter, this is referred to as “use posture”).

On the other hand, when the outboard motor is not used, the hydraulic pump is driven by the electric motor, and pressure oil is supplied from the hydraulic pump to the tilt cylinder to extend the tilt cylinder. Then, the tilt cylinder swings the propulsion unit upward,
The swinging end is set to a posture in which it is located on the water surface (hereinafter, this is referred to as “non-use posture”).

Further, the "non-use attitude" of the propulsion unit is described.
Therefore, when the propulsion unit is again brought into the "use posture", the valve for communicating the inside and outside of the tilt cylinder is opened. Then, due to the weight of the propulsion unit,
The pressurized oil supplied to the tilt cylinder is discharged and contracted, the propulsion unit swings downward, and the propulsion unit is again brought into the “use posture”.

[0007]

In the above-mentioned prior art, an electric motor is provided for driving the hydraulic pump. However, in addition to the electric motor, a power supply and electric wires for the electric motor are required. However, the configuration of the outboard motor is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an outboard motor having a simple configuration.
It is another object of the present invention to make the operation of swinging the propulsion unit constituting the outboard motor light and easy.

[0009]

According to the present invention, there is provided an outboard motor swinging device for a propulsion unit, comprising:
It is as follows.

A first aspect of the present invention is a clamp bracket 6 attached to a rear portion of a hull 2 and a propulsion unit disposed behind the clamp bracket 6 and pivotally supported by the clamp bracket 6 so as to swing up and down. 8, a hydraulic tilt cylinder 23 that is erected between the clamp bracket 6 and the propulsion unit 8 and is capable of expanding and contracting.
And an outboard motor 4 including pressure oil supply means 40 for supplying pressure oil to the tilt cylinder 23 and operating the tilt cylinder 23.

(1) The hydraulic oil supply means 40 is provided with a hydraulic pump 41 capable of supplying hydraulic oil to the tilt cylinder 23.
And an operating means 43 connected to the hydraulic pump 41 for inputting an operating force from a person through the operated part 42 and transmitting the operating force to the hydraulic pump 41 to drive the hydraulic pump 41. Prepared,

(2) The operated portion 42 is disposed inside or above the hull 2.

According to a second aspect of the present invention, in addition to the first aspect, the hydraulic pump 41 is attached to the clamp bracket 6 or the propulsion unit 8.

According to a third aspect of the present invention, in addition to the second aspect, the hydraulic pump 41 is disposed outside the tilt cylinder 23.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a boat floating on the water surface W, and an arrow Fr indicates the front of the boat 1.

An outboard motor 4 is detachably attached to a stern plate 3 which constitutes a rear portion of the hull 2 of the boat 1. The outboard motor 4 includes a clamp bracket 6 detachably attached to an upper edge portion of the stern plate 3 by a fastener 5, and a pivotable pivotally movable up and down on the clamp bracket 6 via a first pivot shaft 7. And a propulsion unit 8 to be supported. The clamp bracket 6 has a rectangular shape when viewed from the front, is fixed to the upper end edge of the stern plate 3, and is attached to the stern plate 3 in a state of being in surface contact with the rear surface. The propulsion unit 8 is disposed near the rear of the clamp bracket 6.

The propulsion unit 8 has a propulsion unit main body 10 which constitutes a lower portion thereof.
0, a pair of upper and lower brackets 12,
12 protrudes forward. A steering shaft 13 whose axis extends substantially vertically is supported by the brackets 12 and 12. On the other hand, a swing arm 15 made of sheet metal is pivotally supported on the clamp bracket 6 by the first pivot shaft 7 so as to be vertically swingable.
A cylindrical portion 15a whose shaft 16 is oriented vertically is formed at the swinging end of the steering shaft 13. The steering shaft 13 is fitted into the cylindrical portion 15a and is rotatably supported around the shaft 16. . In other words, the shaft center 1 is attached to the swing end of the swing arm 15.
The propulsion unit main body 10 is supported to be able to swing left and right around six turns. In addition, in order to facilitate understanding of the drawings,
The swing arm 15 is shown in a satin pattern.

The propulsion unit main body 10 has a cylindrical casing 18 whose axis constitutes an outer shell, and a cowling 19 is detachably attached to the upper end of the casing 18. A drive source such as an engine is housed. In addition, the propulsion unit 8
A propeller 20 is provided at a swinging end around the first pivot shaft 7 constituting a lower end thereof, and the propeller 20 is provided to protrude from a lower end of the casing 18. The propeller 20 is provided in the casing 18. The power transmission mechanism is linked to the drive source.

A steering lever 17 projects from the swing arm 15 toward the hull 2. This steering lever 17
Is gripped from the side of the hull 2 and swung left and right, the propulsion unit 8 is swingable left and right around the axis 16 of the steering shaft 13, that is, steerable.

In all the figures, a hydraulic actuator 22 for swinging the propulsion unit 8 up and down around the first pivot 7 is provided. This actuator 22
Is provided with a hydraulic tilt cylinder 23.

The tilt cylinder 23 is disposed between the clamp bracket 6 and the propulsion unit 8, and is extended over these 6, 8 so as to be able to expand and contract. The tilt cylinder 23 includes a cylinder tube 26 whose axis extends vertically, a piston 27 slidably fitted in the cylinder tube 26 in the axial direction, and a piston rod 28 projecting upward from the piston 27. ing. The piston rod 28 extends outward (upward) from one end (upper end) of the cylinder tube 26 in the longitudinal direction.
A space surrounded by the other end (lower end) of the cylinder tube 26 and the piston 27 is a pressure oil chamber 29.

A first seal body 33 for sealing between the inner peripheral surface of the cylinder tube 26 and the outer peripheral surface of the piston 27 is fixed to the outer peripheral surface of the piston 27. Further, a second seal body 34 for sealing between the inner peripheral surface of one end of the cylinder tube 26 and the outer peripheral surface of the piston rod 28 is fixed to one end of the cylinder tube 26.

The lower end of the cylinder tube 26, which is one end of the tilt cylinder 23, is connected to the second pivot shaft 36.
As a result, the projecting end of the piston rod 28, which is the other end of the tilt cylinder 23, is pivoted to the lower part of the clamp bracket 6 by the third pivot shaft 37 so as to be halfway in the longitudinal direction of the swing arm 15. It is pivoted.

The actuator 22 has a pressure oil supply means 40 for supplying pressure oil to the tilt cylinder 23 and causing the tilt cylinder 23 to expand and contract. Also,
The hydraulic oil supply means 40 includes a hydraulic pump 41 capable of supplying hydraulic oil to the hydraulic oil chamber 29 of the tilt cylinder 23, and an operating force from a human hand connected to the hydraulic pump 41 to operate the operated section 42. While operating means 43 for transmitting the operating force to the hydraulic pump 41 to drive the hydraulic pump 41, and an oil tank 44 for storing oil to be supplied from the hydraulic pump 41 to the tilt cylinder 23. It has.

The hydraulic pump 41 includes a cylinder tube 4 whose axis extends substantially parallel to the cylinder tube 26.
6, a piston 47 is slidably fitted in the cylinder tube 46 in the axial direction, and a piston rod 48 projecting upward from the piston 47 is provided. The piston rod 48 protrudes outward (upward) from one end (upper end) of the cylinder tube 46 in the longitudinal direction, and a space surrounded by the other end (lower end) of the cylinder tube 46 and the piston 47 is formed. A pressure oil chamber 49 is provided. The hydraulic pump 41 includes valve means 50 fixed to the cylinder tube 46.

The hydraulic pump 41 is disposed outside the tilt cylinder 23 and is attached to the cylinder tube 26 of the tilt cylinder 23 by fastening. The hydraulic pump 41 is connected to the clamp cylinder via the tilt cylinder 23. It is attached to the bracket 6.

The operating means 43 includes an operating lever 53 pivotally supported on the cylinder tube 26 of the tilt cylinder 23 by a fourth pivot 52 so as to swing up and down, and a fourth pivot of the operating lever 53. A link 54 for connecting the protruding end of the piston rod 48 of the hydraulic pump 41 is provided at the swinging portion on the shaft 52 side, and the swinging end of the operation lever 53 is the operated portion 42. The operated portion 42 is disposed near the upper rear portion of the hull 2.

The oil tank 44 is provided with the hydraulic pump 41
Of the cylinder tube 46.

The oil tank 44 communicates with the pressure oil chamber 49 of the hydraulic pump 41 through the valve means 50, and the oil flows only from the oil tank 44 toward the pressure oil chamber 49. The pressure oil chamber 49 is connected to the tilt cylinder 23 through the valve means 50 and the oil passage 57.
Of the hydraulic pump 41 of the hydraulic pump 41.
Oil flows only from 9 to the pressure oil chamber 29 of the tilt cylinder 23.

An annular ring closed between the inner peripheral surface of the cylinder tube 26 of the tilt cylinder 23 and the outer peripheral surface of the piston rod 28 by the first and second seals 33 and 34 is provided. The gap 59 is provided between the valve means 50 and the oil passage 6.
0, and the oil passage 61 communicates with the oil tank 44, and the oil flows only from the gap 59 toward the oil tank 44. Further, an oil passage 6 for communicating the pressure oil chamber 29 of the tilt cylinder 23 with the gap 59 is provided.
2 is provided, and a release valve 63 that closes the oil passage 61 so as to be able to open and close is provided.

As shown by the solid line in each figure, the propulsion unit 8
Is a posture in which its swinging end is located below the water surface W including the propeller 20, that is, the "use posture". On this occasion,
The tilt cylinder 23 is in a contracted state. By driving the drive source of the propulsion unit 8 from this state,
The propeller 20 interlocks with this, and the boat 1 is propelled on the water surface W.

In order to move the propulsion unit 8 from the "use posture" to the "non-use posture", the operated unit 42
And swinging the operation lever 53 up and down (FIG. 1).
Middle, arrow A), the piston 4 of the hydraulic pump 41
7 (arrow B in FIGS. 4 and 6), pressure oil is supplied from the pressure oil chamber 49 of the hydraulic pump 41 to the pressure oil chamber 29 of the tilt cylinder 23 through the valve means 50 (arrow in FIG. 4). C), the tilt cylinder 23 is extended.

Then, by the tilt cylinder 23,
The propulsion unit 8 is swung upward (in FIG. 2,
Arrow D), the posture in which the swinging end is located on the water surface W, that is, the “non-use posture”.

When the propulsion unit 8 is changed from the "non-use position" to the "use position" again, the release valve 63 is opened. Then, due to the own weight of the propulsion unit 8, the tilt cylinder 23
The pressure oil supplied to the pressure oil chamber 29 is discharged and contracted, returned to the oil tank 44 through the oil passage 62 and the oil passage 60 (arrow E in FIG. 6), and Swings downward (arrow F in FIG. 2), and the propulsion unit 8 is again set to the “use posture” shown by the solid line.

According to the above configuration, the pressure oil supply means 40 is
A hydraulic pump 41 capable of supplying pressure oil to the tilt cylinder 23, and an operating force from a person connected to the hydraulic pump 41 is input through the operated portion 42, and the operating force is applied to the hydraulic pump 41. And an operating means 43 for transmitting the hydraulic pump 41 by transmitting it.

Therefore, when supplying hydraulic oil to the tilt cylinder 23 in order to swing the propulsion unit 8 upward, the operated part 42 of the operating means 43 is operated to activate the hydraulic pump 41. What is necessary is just to drive it, that is, in order to rock | swing the said propulsion unit 8, conventionally, although the electric motor was used, this becomes unnecessary.

Accordingly, since the power supply and wiring for the electric motor are not required, the configuration of the outboard motor 4 is simplified.

As described above, the tilt cylinder 2
Although the supply of pressurized oil to the cylinder 3 is performed by a human operating force, the supply of the pressurized oil is performed through the hydraulic pump 41, so that the operation for supplying the pressurized oil to the tilt cylinder 23 is light. And easily.

Therefore, the operation of the operating means 43 when supplying the hydraulic oil to the tilt cylinder 23 to swing the propulsion unit 8 upward can be performed lightly and easily.

Since the operated part 42 is disposed above the hull 2, the operation of the operating means 43 on the operated part 42 when the propulsion unit 8 is swung upward is performed by the hull. The operation can be performed from the two sides, so that the operation of the operation means 43 when swinging the propulsion unit 8 can be performed lighter and more easily by the natural posture in the state of being on board.

Since the hydraulic pump 41 is attached to the clamp bracket 6, the hydraulic pump 4
1 prevents the work space of the occupant in the hull 2 from being narrowed, and thus the operation of the operation means 43 is further facilitated.

The hydraulic pump 41 is connected to one side of the clamp bracket 6 and the tilt cylinder 2.
3, the hydraulic pump 41 is attached to the clamp bracket 6 as described above, and the operated part 42 of the operating means 43 connected to the hydraulic pump 41 In the case of disposing the operated portion 42 inside or above the hull 2 located in front of the bracket 6 or the propulsion unit 8, the arrangement of the operated portion 42 reduces interference between the clamp bracket 6 and the tilt cylinder 23. You can easily avoid it.

Therefore, the layout and operation of the arrangement of the operated part 42 can be easily performed, and the degree of freedom of the arrangement position of the operated part 42 is reduced by the interference from the clamp bracket 6 and the tilt cylinder 23. It is possible to improve the operation of the system.

The hydraulic pump 41 and the oil tank 44
Are integrally molded with each other.
2, the pressure oil supply means 40 becomes compact, and
In the ship 1 having a narrow surplus space, the arrangement of the pressure oil supply means 40 can be easily performed.

Although the above description is based on the illustrated example, the hydraulic pump 41 is attached to the stern plate 3 separately from the tilt cylinder 23, and the hydraulic pump 41 is connected to the tilt cylinder 23 by a pipe for supplying hydraulic oil. Is also good. The hydraulic pump 41 may be attached to the swing arm 15 of the propulsion unit 8 or the like. Further, as shown by a dashed line in FIG. 2, the operated portion 42 may be arranged on the inner bottom portion of the rear portion of the hull 2 and operated by stepping. Operation becomes lighter and easier.

[0047]

The effects of the present invention are as follows.

According to a first aspect of the present invention, there is provided a clamp bracket attached to a rear portion of a hull, a propulsion unit disposed behind the clamp bracket and pivotally supported by the clamp bracket so as to swing up and down. An outboard equipped with a hydraulic tilt cylinder that is erected between a bracket and a propulsion unit and that can be extended and retracted, and pressure oil supply means for supplying pressure oil to the tilt cylinder and operating the tilt cylinder On the machine,

(1) The hydraulic oil supply means is connected to a hydraulic pump capable of supplying hydraulic oil to the tilt cylinder, and is connected to the hydraulic pump to input an operating force from a human through the operated portion. Operating means for transmitting the operating force to the hydraulic pump to drive the hydraulic pump.

Therefore, when supplying hydraulic oil to the tilt cylinder in order to swing the propulsion unit, it is sufficient to operate the operated part of the operating means to drive the hydraulic pump. Conventionally, an electric motor has been used to swing the propulsion unit, but this is not necessary.

Therefore, since the power supply and wiring for the electric motor are not required, the structure of the outboard motor is simplified.

As described above, the supply of pressure oil to the tilt cylinder depends on the operation force of a person, but the supply of pressure oil is performed via a hydraulic pump. The operation for supplying the oil is light and easy.

Therefore, the operation of the operating means when the propulsion unit is swung by supplying the pressure oil to the tilt cylinder can be performed lightly and easily.

(2) The operated part is disposed inside or above the hull.

For this reason, the operation of the operating means to the operated portion when the propulsion unit is rocked can be performed from the hull side, and accordingly, the operation of the operation means when the propulsion unit is rocked. Can be made lighter and easier due to the natural posture of the person on board.

According to a second aspect of the present invention, the hydraulic pump is mounted on the clamp bracket or the propulsion unit.

Therefore, the hydraulic pump is prevented from narrowing the work space of the occupant in the hull, and the operation of the operating means is further facilitated.

According to a third aspect of the present invention, the hydraulic pump is disposed outside the tilt cylinder.

Therefore, as described above, the hydraulic pump is attached to the clamp bracket or the propulsion unit, and the operated part of the operating means connected to the hydraulic pump is located in front of the clamp bracket or the propulsion unit. When it is disposed inside or above the hull, the arrangement of the operated portion can avoid interference with the tilt cylinder.

Accordingly, the layout and operation of the arrangement of the operated portion can be easily performed, and the degree of freedom of the arrangement position of the operated portion is improved by the amount of no interference from the tilt cylinder. Can be done more easily.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view of FIG. 2;

FIG. 2 is a side view of the outboard motor.

FIG. 3 is a partially cutaway front view of the outboard motor.

FIG. 4 is a partially enlarged sectional view of FIG. 3;

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ship 2 Hull 4 Outboard motor 6 Clamp bracket 8 Propulsion unit 23 Tilt cylinder 29 Hydraulic oil chamber 40 Hydraulic oil supply means 41 Hydraulic pump 42 Operating part 43 Operating means 44 Oil tank 49 Hydraulic oil chamber

Claims (3)

[Claims] 1. A clamp bracket attached to a rear portion of a hull, a propulsion unit disposed behind the clamp bracket and pivotally supported by the clamp bracket so as to swing up and down, the clamp bracket and the propulsion unit An outboard motor including a hydraulic tilt cylinder that is erected between the cylinders and is capable of expanding and contracting, and a pressure oil supply unit that supplies pressure oil to the tilt cylinder and operates the tilt cylinder. The hydraulic oil supply means is capable of supplying hydraulic oil to the tilt cylinder, and is connected to the hydraulic pump to input an operating force from a human through the operated part;
Operating means for transmitting the operating force to the hydraulic pump to drive the hydraulic pump; (2) swinging of a propulsion unit in an outboard motor in which the operated portion is disposed inside or above the hull; apparatus. 2. The swinging device for a propulsion unit in an outboard motor according to claim 1, wherein the hydraulic pump is attached to the clamp bracket or the propulsion unit. 3. The swinging device for a propulsion unit in an outboard motor according to claim 2, wherein the hydraulic pump is disposed outside the tilt cylinder.