JPH10167188A - Trim tilt device of propulsion machine for vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a slidability of a piston rod and and a swivel bracket by setting a sliding member made of a material excellent in the slidability anticorrosion and abrasion resistance on a head end of the piston rod of a trim cylinder device and a contact point of the swivel bracket with which this part makes contact. SOLUTION: A trim tilt device 17 actuates a propulsion unit to trim or tilt by a trim cylinder device 18 and a tilt cylinder device 19. The trim cylinder device 18 is constituted by arranging a piston 25 on a trim cylinder 24 free to slide, blocking an opening part of the trim cylinder 24 by a rod guide 26 and passing a piston rod 27 connected to the piston 25 through the rod guide 26. Thereafter, a head end member 32 on a head end of the piston rod 27 is brought into contact with a thrust receiver 33 screwed on a swivel bracket 14, but at this time, the head end member 32 is constituted by connecting a base part 39 to a top surface part 38 and it is constituted as a sliding member excellent in a slidability, anticorrosion and abrasion resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trim / tilt device for a marine propulsion device, and more particularly to a trim / tilt device for a marine propulsion device having improved slidability between a piston rod of a trim cylinder device and a swivel bracket. Related to the device.

[0002]

2. Description of the Related Art A trim / tilt device used in a marine propulsion device, for example, an outboard motor, is disposed between a clamp bracket and a swivel bracket of the outboard motor. The outboard motor
A propulsion unit including a propeller and an engine is pivotally supported by a swivel bracket so as to be able to swing in the horizontal direction, and the swivel bracket is supported by the clamp bracket so as to be vertically tiltable, and the clamp bracket can grip the hull. I do. Therefore, by disposing the trim / tilt device between the clamp bracket and the swivel bracket, the propulsion unit and the swivel bracket can be tilted in the vertical direction with respect to the clamp bracket fixed to the hull, so that trim operation or The tilt operation is performed.

The trim / tilt device has a tilt cylinder device and a trim cylinder device. The tilt cylinder device, for example, rotatably couples a tilt cylinder to a clamp bracket, rotatably couples a piston rod to a swivel bracket, and raises or lowers the propulsion unit with respect to the hull by expansion and contraction of the piston rod. is there. In addition, the trim cylinder device fixes the trim cylinder to the clamp bracket, abuts the tip of the piston rod on the swivel bracket, and mainly presses the propulsion unit against the propulsion force of the propulsion unit during forward traveling. The angle of the propulsion unit is adjusted so that the propulsion force works efficiently in the propulsion direction.

As described above, in the trim cylinder device,
The tip of the piston rod contacts the swivel bracket,
The trim operation is performed by the expansion and contraction operation of the trim cylinder device. At this time, since the tip of the piston rod slides on the swivel bracket, a thrust receiver is provided on the swivel bracket at a position where the piston rod abuts.

Here, the piston rod of the trim cylinder device is made of austenitic stainless steel (SUS304).
) And the thrust receiver is made of cast stainless steel, so the propulsion unit of the outboard motor is heavy and the load acting on the piston rod is about 10
If it exceeds 00 kg, the slidability between the piston rod and the thrust receiver may be impaired, and a stick phenomenon may occur.

Therefore, in the conventional trim / tilt device for a marine propulsion device, as disclosed in Japanese Utility Model Laid-Open Publication No. 61-132199, Japanese Utility Model Publication No. 6-26477 or Japanese Patent Laid-Open Publication No. Rolling means such as bearings may be used at the tip of the piston rod or the thrust receiver in the cylinder device, or, as described in JP-A-62-247998, besides the above-mentioned rolling means, the tip of the piston rod may be swung. There has been proposed a device in which a free swivel member is provided to reduce a sliding distance, and the sliding property between a piston rod and a swivel bracket (thrust receiver) is improved.

[0007]

However, when the rolling means such as a bearing is adopted as in the prior art described in the above-mentioned publication, the cost increases because the bearing and the like are expensive. In addition, the processing becomes complicated due to the attachment of rolling means such as a bearing. Further, when a swivel member that can swing freely is installed, the number of parts increases and the cost increases.

The object of the present invention has been made in view of the above-mentioned circumstances, and a ship capable of improving the slidability between a piston rod of a trim cylinder device and a swivel bracket by inexpensive and simple processing. Propulsion machine trim
It is to provide a tilt device.

[0009]

According to a first aspect of the present invention, a propulsion unit is installed so as to be tiltable with respect to a hull via a swivel bracket and a clamp bracket, and is provided between the propulsion unit and the hull. In the trim / tilt device of a marine propulsion device which is provided and has a tilt cylinder device and a trim cylinder device, and tilts and operates the propulsion unit, a tip of a piston rod of the trim cylinder device; A sliding member made of a material having excellent slidability, corrosion resistance and abrasion resistance is provided on at least one of the contact points of the swivel bracket with which the tip of the piston rod contacts.

According to a second aspect of the present invention, in the first aspect of the invention, the sliding member is provided at a tip of a piston rod of a trim cylinder device.

[0011] The invention described in claim 3 is the invention according to claim 1 or 2.
In the invention described in (1), the sliding member is formed by impregnating a sintered material of stainless steel with oil.

[0012] The invention according to claim 4 is the invention according to claim 1 or 2.
In the invention described in (1), the sliding member has a sliding contact surface coated with a metal coating.

According to a fifth aspect of the present invention, in the first, second or third aspect, the sliding member is formed by impregnating a resin with a stainless sintered material. .

According to a sixth aspect of the present invention, in the first aspect of the present invention, the sliding member is configured to be detachable.

The invention according to any one of the first to fifth aspects has the following effects. A sliding member is provided on at least one of the tip of the piston rod of the trim cylinder device and the contact point of the swivel bracket with which the tip of the piston rod abuts, and the sliding member has slidability, corrosion resistance, and wear resistance. Since it is made of an excellent material, the slidability between the piston rod of the trim cylinder device and the swivel bracket can be improved.

Further, since the sliding contact member does not use rolling means such as a bearing, the sliding contact member itself is inexpensive and easy to assemble.

Further, since the sliding member does not use rolling means such as a bearing, machining of a piston rod or a swivel bracket for mounting the sliding member is easy.

In particular, the invention according to claim 5 has the following operation. Since the sintered material is impregnated with the resin, voids generated inside the sintered material can be buried in the resin and sealed, so that intrusion of water such as seawater into the sliding contact member can be prevented.

The invention according to claim 6 has the following operation. Since the sliding contact member is configured to be detachable, when the sliding contact member is worn, it can be dealt with by replacing only the sliding contact member.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an outboard motor to which one embodiment of a trim and tilt device for a marine propulsion device according to the present invention is applied. FIG. 2 is a side view showing the trim / tilt device of FIG. 1 in a sectional state of a trim cylinder device. FIG. 3 is a partially enlarged sectional view of FIG.
4A and 4B show the thrust receiver of FIG. 2, wherein FIG. 4A is a partially cutaway view taken along the line IVA of FIG. 4B, and FIG.
FIG. 4C is a sectional view taken along the line IVC-IVC in FIG.

As shown in FIG. 1, an outboard motor 10 as a marine propulsion unit includes a propulsion unit 13 having a propeller 11 and an engine 12 supported by a swivel bracket 14 so as to be swingable in a horizontal direction. A swivel bracket 14 is supported by a clamp bracket 15 so as to be tiltable in a vertical direction. When the clamp bracket 15 holds the hull 16 and is fixed to the hull 16, the propulsion unit 13 can swing horizontally with respect to the hull 16 and can tilt vertically. The propeller 11 of the outboard motor 10 is rotated in forward and reverse directions by the engine 12, and the hull 16 moves forward or backward.

Swivel bracket 14 of outboard motor 10
A trim / tilt device 17 is installed between the clamp bracket 15 and the clamp bracket 15. The expansion / contraction of the trim cylinder device 18 and the tilt cylinder device 19 of the trim / tilt device 17 causes the propulsion unit 13 of the outboard motor 10 to perform a trim operation or a tilt operation. The trim operation adjusts the angle of the propulsion unit 13 against the thrust of the propeller 11 while the hull 16 is sailing, and changes the sailing attitude of the hull 16. In the tilt operation, the propulsion unit 13 is tilted against its own weight when the boat is stopped or when the hull 16 is unloaded, so that the propulsion unit 13 is raised above the water surface.

As shown in FIG. 2, the trim cylinder device 1
8, a piston 25 is slidably disposed on each of the two trim cylinders 24.
4 is closed by the rod guide 26 and the piston 25
The piston rod 27 is connected to the rod guide 26 so as to pass therethrough. In addition, the tilt cylinder device 19
A piston (not shown) is slidably disposed on the tilt cylinder 28, and the piston rod 2 connected to the piston is
9 is configured to pass through a rod guide (not shown). This rod guide also closes the opening of the tilt cylinder 28.

The trim cylinder 24 and the tilt cylinder 2
8 is integrally formed and is swingably supported by the clamp bracket 15 by the pivotal support 30. A shaft support 31 is formed at the tip of the piston rod 29 of the tilt cylinder device 19, and the shaft support 31 is supported by the swivel bracket 14. Further, the tip member 32 at the tip of the piston rod 27 of the trim cylinder device 18 is connected to the swivel bracket 1.
4 can be brought into contact with the thrust receiver 33 screwed.

As shown in FIG. 4, the thrust receiver 33 has a base portion 35 connected to a top surface portion 34, and a swivel bracket 1 is provided by a screw portion 36 of the base portion 35.
4 is screwed. The mounting position of the thrust receiver 33 is where the tip member 32 of the piston rod 27 of the trim cylinder device 18 comes into contact with the swivel bracket 14 at the time of trim operation. The top surface portion 34 of the thrust receiver 33 is formed with a curved surface 37 having a horn shape, and the distal end member 32 of the piston rod 27 can slide on the curved surface 37.

The tip member 32 is, as shown in FIG.
A base portion 39 is continuously provided on the top surface portion 38, and is configured as a sliding contact member excellent in slidability, corrosion resistance, and wear resistance. That is, the tip member 32 is made of austenitic, ferritic, martensitic or precipitation hardened stainless sintered material impregnated with oil.

On the other hand, the piston rod 27 of the trim cylinder device 18 is made of austenitic stainless steel (SUS30).
4) and the like, and a concave portion 40 is formed at the tip of the piston rod 27. The base 39 of the tip member 32 is detachably press-fitted or screwed into the recess 40, and the tip member 32 is attached to the tip of the piston rod 27. The top surface 38 of the tip member 32 has a substantially hemispherical surface on the front side, and the area of the top surface 34 of the thrust receiver 33 that contacts the curved surface 37 is minimized, so that the swivel bracket 14 (propulsion unit 13) The shape is advantageous for tilting and sliding with respect to the thrust receiver 33. When the base 39 of the tip member 32 is pressed into the recess 40 of the piston rod 27, the top surface 3
8, a notch 41 is formed on the back surface side.
The insertion of a tool into 1 facilitates detachment of the tip member 32.

According to the above embodiment, the following effects are obtained. A tip member 32 is provided as a sliding member at the tip of the piston rod 27 of the trim cylinder device 18, and the tip member 32 is made of a material having excellent slidability, corrosion resistance and wear resistance. The slidability between the tip member 32 of the piston rod 27 and the thrust receiver 33 installed on the swivel bracket 14 with which the tip member 32 abuts can be improved.

Further, since the tip member 32 does not use rolling means such as a bearing, the tip member 32 itself is inexpensive, and the tip member 32 is assembled to the recess 40 formed in the piston rod 27. Therefore, assembling of the tip member 32 is also easy.

Further, since the tip member 32 does not use rolling means such as a bearing, the tip member 32
In order to install the
Is sufficient, and the processing of the piston rod 27 for attaching the distal end member 32 can be facilitated.

Since the tip member 32 is configured to be detachable, when the tip member 32 is worn, it can be dealt with by exchanging only the tip member 32.

In the above embodiment, the tip member 32
However, stainless steel sintered material was impregnated with oil to improve the sliding property, corrosion resistance and wear resistance.
Along with the tip member 32, the thrust receiver 33 is also made of the same material as the tip member 32 (a material obtained by impregnating a sintered material of stainless steel with oil), and has a sliding contact excellent in slidability, corrosion resistance and wear resistance. You may function as a member.

Alternatively, as described above, the thrust receiver 33 is made of a material obtained by impregnating oil into a sintered material of stainless steel, and the tip member 32 is not installed at the tip of the piston rod 27 of the trim cylinder device 18. The tip of the rod 27 may directly contact the thrust receiver 33.

A tip member 45 shown in FIG. 5 is a modification of the above-described tip member 32, and has a metal coating 46 made of a metal such as molybdenum or tungsten on a sliding surface of a top surface portion 38. Specifically, the metal coating 46 is preferably a two-way molybdenum coating or a tungsten garbite coating. Such a metal coating 46 can also improve the slidability with respect to the thrust receiver 33 installed on the swivel bracket, and can also improve the corrosion resistance and the wear resistance. Also, the curved surface 3 of the thrust receiver 32
7, a metal coating 46 similar to the tip member 45 described above.
May be applied.

Further, the tip member and the thrust receiver made of a stainless sintered material may be impregnated with resin. The sintering material depends on the shape of the powder used, the density of the green compact,
Although voids are formed inside due to sintering conditions and the like, by impregnating the resin, the voids can be buried with the resin to perform the sealing treatment. For this reason, in the case of the tip member and the thrust receiver impregnated with the resin, the above-described slidability, corrosion resistance, and abrasion resistance can be improved, and water such as seawater can be prevented from entering.

[0036]

As described above, according to the trim / tilt device for a marine propulsion device according to the present invention, the slidability between the piston rod of the trim cylinder device and the swivel bracket is improved.
It can be improved by inexpensive and simple processing.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a trim and a marine propulsion device according to the present invention.
It is a side view which shows the outboard motor to which one Embodiment of the tilt apparatus was applied.

FIG. 2 is a side view showing the trim / tilt device of FIG. 1 in a sectional state of a trim cylinder device.

FIG. 3 is a partially enlarged sectional view of FIG. 2;

FIG. 4 shows the thrust receiver of FIG. 2;
FIG. 4A is a partially broken view of FIG.
FIG. 4B is a front view, and FIG. 4C is a cross-sectional view taken along line IVC-IVC in FIG.

FIG. 5 is a front view showing a modified example of the distal end member of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Outboard motor (marine propulsion machine) 13 Propulsion unit 14 Swivel bracket 15 Clamp bracket 16 Hull 17 Trim / tilt device 18 Trim cylinder device 27 Piston rod 32 Tip member 33 Thrust receiver 45 Tip member 46 Metal coating

Claims (6)

[Claims] 1. A propulsion unit is installed so as to be tiltable with respect to a hull via a swivel bracket and a clamp bracket. The propulsion unit is disposed between the propulsion unit and the hull and includes a tilt cylinder device and a trim cylinder device. In the trim / tilt device of a marine propulsion device for tilting and trimming the propulsion unit, the tip of a piston rod of the trim cylinder device and the swivel bracket contacting the tip of the piston rod. A trim / tilt device for a marine propulsion device, wherein a sliding member made of a material having excellent slidability, corrosion resistance and wear resistance is provided on at least one of the locations. 2. The trim / tilt device for a marine propulsion device according to claim 1, wherein the sliding member is provided at a tip of a piston rod of the trim cylinder device. 3. The trim / tilt device for a marine propulsion device according to claim 1, wherein the sliding member is configured by impregnating a sintered material of stainless steel with oil. 4. The trim / tilt device for a marine propulsion device according to claim 1, wherein the sliding member is provided with a metal coating on a sliding surface. 5. The trim / tilt device for a marine propulsion device according to claim 1, wherein the sliding member is formed by impregnating a resin with a sintered material of stainless steel. 6. The trim / tilt device for a marine propulsion device according to claim 1, wherein the sliding member is configured to be detachable.