JPH0674076B2 - Hydraulic tilt device for outboard propulsion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an underwater propulsion device such as an outboard motor provided at the stern of a motor boat or a small fishing boat, or an outboard propulsion mechanism such as an outboard propulsion mechanism of an inboard motor. The present invention relates to a hydraulic tilting device for an outboard propulsion device that tilts to and from the water, and in particular, it tilts between a position where the outboard propulsion device is lowered into the water by a tilt cylinder mechanism and a position where the outboard propulsion device is raised above the water. With the trim cylinder mechanism, it is possible to adjust the inclination angle of the outboard propulsion unit with respect to the hull, and both cylinder mechanisms are connected to a common hydraulic pump to extend in conjunction with each other. The present invention relates to a device for pulling an outboard propulsion device out of water and detecting it when it is locked on the water to automatically reverse the hydraulic pump to shorten the trim cylinder mechanism.

[Conventional technology]

As a conventional hydraulic tilt device for an outboard propulsion device, a tilt cylinder mechanism and a trim cylinder mechanism are provided between an outboard propulsion device and a ship, as disclosed in, for example, JP-A-60-104492. , There is a configuration in which they are connected to a common hydraulic pump so that both cylinders are extended in conjunction with each other.

In the tilt device disclosed in this publication, when oil is supplied to the tilt cylinder mechanism to pull the outboard propulsion unit out of water to above the water, the trim rod of the trim cylinder mechanism receives pressure oil from the hydraulic pump and projects into the water. Becomes If the trim rod is left without being removed, aquatic organisms will adhere to it. Therefore, the device is provided with means for moving the trim rod into the trim cylinder mechanism.

[Problems to be Solved by the Invention]

However, if the trim rod is to be removed and the incidental operation is performed as described above, it takes a long time to pull the outboard propulsion unit above the water, and the user sometimes forgets to perform the operation.

The present invention has been made to solve such a problem, and a structure configured such that the trim rod is automatically withdrawn when the outboard propulsion unit is pulled up to the water and locked there. The purpose is to obtain a simple device.

[Means for Solving the Problems]

A hydraulic tilt device for an outboard propulsion device according to the present invention comprises a tilt cylinder mechanism for tilting an outboard propulsion device provided at the stern between a position in which the propulsion device is lowered into water and a position in which the propulsion device is raised above water, and the outboard propulsion device. And a trim cylinder mechanism that adjusts the tilt angle with respect to the hull in a state where the tilt cylinder mechanism is contracted. Locking means for holding the outboard propulsion device in a position where it is pulled up to the water by blocking the above, and a hydraulic pump according to a detection signal of a detector that detects that this locking means holds the outboard propulsion device in the lifting position. And a control circuit capable of shortening only the trim cylinder mechanism by reversing for a predetermined time.

[Action]

After supplying pressure oil to the tilt cylinder mechanism and pulling the outboard propulsion device above the water, if the locking means is activated and locked in that position, the hydraulic pump responds to the operation of the locking means for the set time. Driving in the opposite direction, the trim cylinder mechanism is shortened and the trim rod is withdrawn.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2.

FIG. 1 is a block diagram of a hydraulic tilt device for an outboard propulsion device according to the present invention, and FIG. 2 is a block diagram of a control circuit.

In these figures, 1 is a stern, and a stern side member 2 for mounting an outboard propulsion device such as an outboard propulsion mechanism of an outboard motor or an outboard motor is provided therein, and an outboard propulsion device 4 is provided by a pin 3. A barrel outboard motor is pivotally supported so as to be tiltable between water and water. Reference numeral 4a is a propeller provided at the lower rear end of the outboard propulsion unit 4. A tilt cylinder mechanism 5 and a trim cylinder mechanism 6 are provided between the stern side member 2 and the outboard propulsion unit 4 so as to extend and contract.

The tilt cylinder mechanism 5 includes a hydraulic cylinder 5a pivotally supported on the side of the outboard propulsion unit 4, a tilt piston 5b fitted therein,
And a tilt rod 5c that connects the tilt piston 5b and the stern side member 2, and has a first oil chamber 5d on one side of the tilt piston 5b and a second oil chamber 5e on the other end, and the tilt cylinder mechanism 5 Is extended or shortened, the outboard propulsion unit 4 is pulled up to the water or lowered into the water.

On the other hand, the trim cylinder mechanism 6 includes an operating cylinder 6a attached to the stern member 2 and a trim piston fitted therein.
6b, the trim piston 6b is provided with a trim rod 6c, which penetrates the end plate of the working cylinder 6a and projects rearward,
It moves back and forth between two positions, a relatively projecting position and a retreating position. 6d is a first oil chamber formed on one side of the trim piston 6b, and 6e is a second oil chamber formed on the other side. In addition, in this embodiment, although it is not clear in the drawing, the working cylinder
Two 6a are arranged side by side in the paper surface direction. Thus, the hydraulic oil is sent to the second oil chamber 6e little by little, the trim rod 6c is projected to a desired position, and the outboard propulsion unit 4 is tilted clockwise to adjust the tilt angle with respect to the hull.

Reference numeral 7 is a hydraulic pump, specifically, a gear pump having two pairs of ports, a first port 7a and a second port 7b, one side of which serves as an intake port and the other side of which serves as a discharge port due to the rotary port of the pump. In other words, the hydraulic pump 7 has the suction and discharge directions of the hydraulic oil reversed between the forward rotation and the reverse rotation.

A switching valve 8 is interposed between the hydraulic pump 7 and both cylinder mechanisms 5 and 6, and a free piston is provided in the cylinder 8a.
8b is slidably provided and has an upper chamber 8c formed on one side of the free piston 8b and a lower chamber 8d formed on the other side. Upper chamber
8c and the lower chamber 8d are provided with relief valves 8e, 8e at the end of the cylinder 8a, and the relief valves 8e, 8e are projecting pins 8f projecting at both ends when the free piston 8b is displaced to one side. Seating is blocked by 8f and the valve remains open.

Next, a hydraulic circuit from the hydraulic pump 7 to the hydraulic cylinder 5a and the working cylinder 6a via the switching valve 8 will be described. First, the first port 7a of the hydraulic pump 7 is connected to the oil tank 9 and the upper chamber 8c of the switching valve 8 via the check valve 7c,
The second port 7b is connected to the oil tank 9 and the lower chamber 8d of the switching valve 8 via the check valve 7d. The check valves 7c and 7d prevent the oil flow to the oil tank 9. Therefore, when the hydraulic pump 7 normally rotates, the working oil in the oil tank 9 passes from the second port 7b via the check valve 7d. Inhaled, switching valve 8 from the first port 7a
Is supplied as pressure oil to the upper chamber 8c. Also, the hydraulic pump 7
Is reversed, the hydraulic oil in the oil tank 9 is sucked from the first port 7a via the check valve 7c and is supplied from the second port 7b to the lower chamber 8d of the switching valve 8 as pressure oil.

The upper chamber 8c of the switching valve 8 has a first oil passage 9a connected to the relief valve 8e.
Through the first oil chamber 5d of the hydraulic cylinder 5a and the working cylinder 6a
And the lower chamber 8d communicates with the second oil chamber 5e of the hydraulic cylinder 5a via the second oil passage 9b which is continuous with the relief valve 8e. An on-off valve 9d as a locking means according to the present invention is interposed in the second oil passage 9b as shown by a broken line in FIG.

Further, the first oil chamber 6d of the working cylinder 6a has a third oil passage 9e.
It is communicated with the second port 7b of the hydraulic pump 7 via. In the third oil passage 9e, a check valve 6h that allows pressure oil to flow only to the working cylinder 6a side and a relief valve 6f that has a flow direction opposite to that of the check valve 6h are interposed in parallel. It is equipped. Further, the portion of the third oil passage 9e that is closer to the hydraulic pump 7 than the check valve 6h and the relief valve 6f is a relief valve 6i that allows the working oil to flow only in the direction in which the pressure oil is derived from this portion.
Is communicated with the oil passage on the oil tank 9 side.

FIG. 2 shows a control circuit of the DC motor 15 for driving the hydraulic pump 7. The DC motor 15 selectively drives the hydraulic pump 7 in both forward and reverse directions. 16 is a storage battery as a power source,
It is connected to the DC motor 15 via a forward rotation circuit 17 and a reverse rotation circuit 18. The forward rotation circuit 17 is provided with a manual forward rotation switch 19, and the reverse rotation circuit 18 is a push-button reverse rotation switch 20.
And a timer switch 21 that responds to the closing of the on-off valve 9d and closes the reverse rotation switch 20 for a predetermined time. The on-off valve 9d as a locking means temporarily locks the outboard propulsion unit 4 at a position where it is pulled above the water. Reference numeral 28 in the figure is a detection switch for detecting the operation of the on-off valve 9d. That is, when the on-off valve 9d is closed, the detection switch 28 detects it and the timer switch 21 is turned on.

The operation of this embodiment will be described. When the boat is sailing, the outboard propulsion unit 4 is lowered into the water, and the front side of the outboard propulsion unit 4 in the traveling direction is in contact with the trim rod 6c. Therefore, when the propeller 4a rotates in the forward direction, its thrust pushes the hull forward through the trim rod 6c. Propeller 4a while the ship is navigating
In order to tilt the outboard propulsion unit 4 so that the lower part thereof moves rearward in order to adjust the inclination angle of the hydraulic pump 7, the hydraulic pump 7 is normally rotated to operate from the first port 7a through the first oil passage 9a. The pressure oil is supplied to the second oil chamber 6e of the cylinder 6a, and the first oil chamber
The hydraulic oil in 6d is returned to the second port 7b being sucked through the relief valve 6f of the third oil passage 9e, and the trim rod 6c is projected to the outside. Further, in order to tilt the outboard propulsion unit 4 in the opposite direction to the above, the hydraulic pump 7 is rotated in the reverse direction to the first oil chamber 6d from the second port 7b through the check valve 6h of the third oil passage 9e. By supplying hydraulic oil, the hydraulic oil in the second oil chamber 6e on the other side is returned to the oil tank 9 through the relief valve 9c provided in the first oil passage 9a, and the trim rod 6c is withdrawn. .

When finishing the navigation, the outboard propulsion unit 4 is pulled up to the water. That is, when the hydraulic pump 7 is normally rotated to supply pressure oil from the first port 7a to the first oil chamber 5d of the hydraulic cylinder 5a through the first oil passage 9a, the tilt rod 5c extends outward from the working cylinder 5a. The outboard propulsion unit 4 tilts clockwise about the pin 3 as shown in FIG. 1 and is pulled up to the water. After that, if the on-off valve 9d serving as the locking means is closed, thereafter, even if the hydraulic pump 7 is stopped, the pressure oil is retained in the second oil chamber 5e, and the outboard propulsion unit 4 is locked on the water as it is. . When the outboard propulsion unit 4 is pulled above the water in this way, the working oil is also supplied from the first oil passage 9a to the working cylinder 6a of the trim cylinder mechanism 6 so that the trim rod 6c projects.

When the on-off valve 9d is closed as described above, the reference numeral
The detection switch 28 shown by 28 turns on the timer switch 21,
The timer switch 21 turns on the reverse rotation switch 20 for a predetermined time. At this time, the hydraulic pump 7 is rotated in the reverse direction so that the working cylinder is operated from the second port 7b through the third oil passage 9e.
The hydraulic oil is supplied to the first oil chamber 6d of 6a so that the trim rod 6c is withdrawn. At this time, the switching valve 8
1. The free piston 8b moves upward in FIG. 1 and hydraulic pressure is applied to the second oil passage 9b from the switching valve 8.
Since 9d is closed, hydraulic pressure is not transmitted to the hydraulic cylinder 5a of the tilt cylinder mechanism 5, and the outboard propulsion unit 4 is held in the pulling position.

Therefore, after pulling the outboard propulsion unit 4 above the water, the on-off valve
When 9d is closed to lock the outboard propulsion unit 4 in the pulled-up position, the hydraulic pump 7 is reversely rotated for a fixed time in response to this, and the trim cylinder mechanism 6 is shortened.

In the present embodiment, the example in which the locking means is constituted by the on-off valve 9d interposed in the hydraulic circuit is shown, but the locking means may be constituted by the strut rod as shown in FIG. .

FIG. 3 is a constitutional view showing another embodiment of the locking means, in which the same or equivalent members as those described in FIGS. 1 and 2 are designated by the same reference numerals, and detailed description thereof will be omitted. Omit it. In FIG. 3, the reference numeral 27 indicates a bracing rod, and the bracing rod 27 is provided on the stern 1 so as to be able to be raised and lowered via the support shaft 1a. Detection switch 28 shown in FIG.
Is configured to detect the bracing rod 27 in a state of standing upright as shown by a two-dot chain line in the figure and supporting the outboard propulsion unit 4 in the pulled-up position from below.

When the strut rod 27 is used in this way, the on-off valve indicated by reference numeral 9d in FIG. 1 is unnecessary. That is, by rotating the hydraulic pump 7 in the forward direction to position the outboard propulsion unit 4 at the pull-up position, the strut bar 27 is erected and sandwiched between the hull and the outboard propulsion unit 4. It is possible to prevent the outboard propulsion unit 4 from being supported from below, and to prevent it from naturally descending into the water.

When the bracing rod 27 is in the upright state, the detection switch 28 detects this and the timer switch shown in FIG.
21 is turned on, whereby the reverse rotation switch 20 is turned on and the hydraulic pump 7 is rotated in reverse. When the hydraulic pump 7 is rotated in the reverse direction, the trim rod 6c of the trim cylinder mechanism 6 is withdrawn similarly to the above-mentioned embodiment. Further, at this time, hydraulic pressure is applied to the hydraulic cylinder 5a of the tilt cylinder mechanism 5 from the switching valve 8 via the second oil passage 9b, and hydraulic pressure is applied to the tilt cylinder mechanism 5 in the direction of shortening. Since the tension rod 27 is interposed between the machine 4 and the stern and the tilt cylinder mechanism 5 is not shortened, the outboard propulsion machine 4 is held in the pulling position.

Therefore, after the outboard propulsion unit 4 is pulled up to the water, if the outboard propulsion unit 4 is locked at the pulling up position by the strut rod 27, the hydraulic pump 7 is rotated in reverse for a certain time in response to this, and the trim cylinder The mechanism 6 will be shortened.

〔The invention's effect〕

As described above, the hydraulic tilt device for an outboard propulsion device according to the present invention includes a tilt cylinder mechanism that tilts the outboard propulsion device provided at the stern between a position in which the propulsion device is lowered into water and a position in which the propulsion device is pulled up above water, and The tilt cylinder is provided with a trim cylinder mechanism that adjusts the tilt angle with respect to the hull when the outboard propulsion device is lowered into the water, and both cylinder mechanisms are connected to a common hydraulic pump so that they can be extended in conjunction with each other. Locking means for holding the outboard propulsion unit in the position where it is pulled up to the water by preventing the mechanism from contracting, and detection of a detector that detects that this locking unit holds the outboard propulsion unit in the pulling position A control circuit was provided to reverse the hydraulic pump for a predetermined time according to the signal and to shorten only the trim cylinder mechanism.Therefore, pressure oil is supplied to the tilt cylinder mechanism to drive the outboard propulsion unit out of the water. After pulling up, if the locking means is operated and locked in that position, the hydraulic pump is operated in the reverse direction for the set time in response to the operation of the locking means, the trim cylinder mechanism is shortened and the trim rod is retracted. To be done.

Therefore, no special operation is required for retracting the trim rod into the hydraulic cylinder, the operation is simple, and the hydraulic circuit is also simple, so that the manufacturing is easy.

[Brief description of drawings]

FIG. 1 is a block diagram of a hydraulic tilt device for an outboard propulsion device according to the present invention, FIG. 2 is a block diagram of a control circuit, and FIG. 3 is a block diagram showing another embodiment of a locking means. 1 ... stern, 3 ... pin, 4 ... outboard propulsion device, 5 ... tilt cylinder mechanism, 5a ... hydraulic cylinder, 5b ... tilt piston, 5c ... tilt rod, 5d ... first oil chamber , 5e ...
… Second oil chamber, 6 …… Trim cylinder mechanism, 6a …… Working cylinder, 6b …… Trim piston, 6c …… Trim rod,
6d ... first oil chamber, 6e ... second oil chamber, 7 ... hydraulic pump,
7a ... 1st port, 7b ... 2nd port, 8 ... switching valve, 9d ... opening / closing valve, 19 ... forward rotation switch, 20 ... reverse rotation switch, 21 ... timer switch, 27 ... tension rod , 28
...... Detection switch.

Claims (3)

[Claims] 1. A tilt cylinder mechanism for tilting an outboard propulsion unit provided at the stern between a position in which it is lowered into water and a position in which it is pulled up above water, and a tilt with respect to a hull with the outboard propulsion unit lowered in water. A trim cylinder mechanism that adjusts the angle is provided, and both cylinder mechanisms are connected to a common hydraulic pump so that they can be extended in conjunction with each other, while the tilt cylinder mechanism is prevented from contracting to allow the outboard propulsion device to operate. Trim by reversing the hydraulic pump for a predetermined time according to the detection signal from the locking means that holds the boat in the raised position and the detector that detects that this locking mechanism holds the outboard propulsion unit in the raised position. A hydraulic tilt device for an outboard propulsion device, comprising: a control circuit capable of shortening only a cylinder mechanism. 2. Locking means for locking the tilt cylinder mechanism on the water is constituted by a strut rod which is provided at the stern so as to be able to be tilted up and down and supports the outboard propulsion device in a state of being pulled up above the water from below. The hydraulic tilting device for an outboard propulsion device according to claim 1, wherein the control circuit is configured to detect the tension rod in a state in which the outboard propulsion device is supported. 3. A locking means for locking the tilt cylinder mechanism on water is constituted by an opening / closing valve for closing an oil passage leading to the tilt cylinder mechanism, and a control circuit is arranged so that the opening / closing valve is closed. The hydraulic tilt device for an outboard propulsion device according to claim 1, wherein the hydraulic tilt device is configured to detect the.