JP3064124B2 - Spherical plain bearings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spherical slide bearing used underwater such as seawater, and more particularly to a lip seal for sealing a lubricant such as grease sealed in a slide surface and a foreign matter in seawater. The present invention relates to an improvement in a lubricant-enclosed spherical plain bearing having a dust seal for preventing intrusion into a sliding surface.

[0002]

2. Description of the Related Art Conventionally, a spherical plain bearing as shown in FIG. 8 has been known. Even if the center lines of a shaft and a bearing cross at a certain angle, the outer peripheral surface of an inner ring 21 and an outer ring are formed.
By making the inner peripheral surface of 22 a spherical surface, the inclination of the axis is allowed. In general, grease is sealed in the sliding surface, and a seal is provided for preventing grease leakage. Note that reference numeral 23 in FIG.
Shows a PTFE liner reinforced with a copper alloy mesh, and the liner 23 is fixed to the sliding surface.

[0003]

When the above-mentioned conventional spherical plain bearing is used in seawater, there is a solid foreign matter such as sand in the seawater, and the solid foreign matter causes the spherical sliding to cause cutting wear. Occurs. In addition, marine organisms (such as barnacles) adhere to the sliding surface of the spherical plain bearing and hinder the durability of the spherical plain bearing. Particularly, in the case of a spherical bearing with a lubricant, the seal for preventing leakage of the lubricant is damaged. In order to prevent this, a dust seal is conventionally provided separately from the spherical plain bearing.

[0004] As described above, in the case of the conventional spherical plain bearing with a lubricant, a dust seal must be provided in addition to the seal for preventing leakage of the lubricant. There is a problem that the size becomes large as a whole. The present invention seeks to solve such problems, and in a lubricant-enclosed spherical plain bearing, in addition to a lip seal for preventing leakage of lubricant, for preventing intrusion of solid matter into a sliding surface. When attaching a dust seal, a seal member in which a lip seal and a dust seal are pre-installed is attached to a spherical plain bearing to reduce assembly man-hours and reduce the size of the bearing.
Another object of the present invention is to provide a spherical plain bearing which can withstand external pressure in deep water .

[0005]

In order to achieve the above-mentioned object, a spherical plain bearing of the present invention has an inner ring whose outer peripheral surface is formed as a convex spherical surface, and an inner peripheral surface which is slidable with the aforementioned convex spherical surface. an outer ring which is formed in a concave shape spherical surface that engages, and a deliverable lubricant supply hole a lubricant is formed in the outer ring sliding surface between the convex spherical surface and a concave spherical surface of the, side surfaces of the outer ring the seal member is attached to the same sheet seal member, and a dust seal to the outside of the lip seal is eclipsed set with a lip seal for preventing leakage of the lubricant is protruded formed on one body Back-up to prevent buckling of the seal member
The sealing member is provided so as to contact the inner surface of the sealing member.
And the sealing member is moved up together with the backup member.
It is characterized in that a part of the side surface of the outer ring is caulked and fixed .

[0006]

In the above-described spherical plain bearing of the present invention, the lip seal provided near the sliding surface of the spherical plain bearing prevents leakage of lubricant such as grease, oil, etc., and moves farther from the sliding surface. The provided dust seal prevents solid foreign matter from entering the sliding surface side. In addition, the dust seal is always in sliding contact to prevent marine organisms from adhering. Furthermore, even if the dust seal is damaged and seawater enters, light is blocked by the dust seal inward of the dust seal, so that marine organisms do not attach or grow. And the sealing member
Buckling with the backup member in contact with the inner surface
So it can withstand use in deep water
You. In addition, the seal member is
The outer ring is fixed by caulking a part of the outer ring.
It is simple and robust.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of a spherical plain bearing as a first embodiment, and FIG. 2 is a side sectional view of the modification. FIG. 3 is a side sectional view of a spherical plain bearing as a second embodiment, and FIG. 4 is a side sectional view of the modification. FIG. 5 is a side sectional view of a spherical plain bearing as a third embodiment, and FIG. 6 is a side sectional view of the modification. FIG.
FIG. 7 is a side sectional view of a modification of the mounting structure of the seal member.

The spherical plain bearing of the first embodiment shown in FIG. 1 also has an inner ring 1 having a spherical surface 2 whose outer peripheral surface is formed as a convex spherical surface.
And an outer ring 3 having a spherical surface 2 whose inner peripheral surface is formed as a spherical surface 2 and a slidable concave spherical surface, and the spherical surface 2 and the spherical surface 4 relatively slide to each other, and the respective center lines of the shaft and the bearing. Even if they cross at a certain angle, they can be supported while allowing the inclination of the shaft.

A lubricant supply hole 11 is provided in the outer race 3, and a sliding surface between the spherical surface 2 and the spherical surface 4 is formed through the lubricant supply hole 11.
Lubricants such as oil and grease are supplied. Seal member 5 on the side surface of the outer ring 3 has a portion 7 of the side surface of the outer ring 3 with backup material 6 disposed in contact with the inner surface of the seal member 5 is solid wear caulked. A space 8 is formed between the inner peripheral portion of the seal member 5 and the outer ring 3, and a lip seal 9 for preventing leakage of a lubricant such as oil or grease in the space 8 is integrally provided with the seal member 5. Further, a dust seal 10 for preventing solid foreign matter from entering is provided on the seal member 5 outside the lip seal 9. Note that both the lip seal 9 and the dust seal 10 come into sliding contact with the spherical surface 2 of the inner ring 1 at their distal ends.

With the above configuration, the lip seal 9 provided on the side closer to the sliding surface of the spherical bearing (the sliding surface between the spherical surface 2 and the spherical surface 4) has an effect of sealing a lubricant such as grease or oil. The dust seal 10 provided farther from the sliding surface has the effect of preventing solid foreign matter from entering the sliding surface. And in the case of this embodiment, the lip seal 9 and the dust seal 10, are integrated in the seal member 5 on the side surface of the outer ring 3 of the spherical plain bearing, the Dogairin 3
For the part of the side surface is configured to be solid deposited by crimping, it can be done by a simple process placement of the lip seal 9 and the dust seal 10, and it is possible to compact the bearing.

Further, when used in the sea, the hydrostatic pressure corresponding to the depth from the sea surface acts on the seal member 5 as an external force. In deep water, the lip seal 9 and the dust seal 10 are strongly pressed against the spherical surface 2 by this external force, and a necessary pressing load is generated on each of the sealing surfaces. If the pressing load becomes excessive, the seal member 5 will buckle. In order to prevent this, a backup member 6 is disposed so as to be in contact with the inner surface of the seal member 5, and as described above,
5 and the backup member 6 cover a part 7 of the side surface of the outer ring 3.
Shimete Ru Nodea to be fixed. By changing the contact position between the backup member 6 and the seal member 5, it is possible to adjust the pressing load against the seal surface by the hydrostatic pressure.

The modification shown in FIG. 2 differs from the spherical plain bearing shown in FIG. 1 in that a second lip seal 12 is formed integrally with the seal member 5 in place of the dust seal 10. . It should be noted that the operation and effect are almost the same as those of the spherical plain bearing shown in FIG. In the second embodiment and its modification shown in FIGS.
Is provided on the seal member 5 so as to slide on the spherical surface 2 of the inner ring 1, but the dust seal 10 or the second lip seal 12 slides on the side surface 1 a of the inner ring 1. The configuration is different from those of the first embodiment and its modification. However, the sealing member 5 and its backup
Is fixed by caulking a part 7 of the side surface of the outer ring 3.
The effect is the same as that of the spherical plain bearing shown in FIG.

In the third embodiment and its modification shown in FIGS. 5 and 6, a lip seal 9 is provided on the seal member 5 so as to be in sliding contact with the side surface 1a of the inner race 1, and further a dust seal 10 or a second seal is provided. The configuration differs from that of the first embodiment and its modification in that the lip seal 12 comes into sliding contact with the outer peripheral surface 1b of the inner ring 1. However,
The roller member 5 and its backup member 6
The point that the part 7 of the side is fixed by caulking is the same.
The effect of the which is substantially the same as the spherical sliding bearing shown in FIG.

By the way, there is a possibility that a negative external force acts on the seal member 5 due to the force acting on the spherical plain bearing or the influence of the ocean current during use in the sea. FIG. 7 shows a modification capable of coping with such a situation, in which a backup member 14 is also arranged on the outer surface side of the seal member 5 and the seal member 5 is sandwiched between the inner and outer surfaces by the backup members 6 and 14. Has become. With this configuration, even if a negative external force acts on the seal member 5, the seal member 5 can be prevented from being separated outward, and the seal member 5 can be stabilized. It should be noted that the configuration shown in FIG. 7 can be applied to any of the first to third embodiments and their modifications, and in that case, the above advantages can be obtained.

[0015]

As described above, according to the spherical plain bearing of the present invention, the following effects and advantages can be obtained. (1) In a lubricant-filled spherical plain bearing, a lip seal and a dust seal can be assembled to the main body of the spherical plain bearing by a simple assembly process, and the spherical plain bearing with a lip seal and a dust seal is made compact. can do. (2) The dust seal can prevent solids and marine organisms in seawater from entering the sliding surface of the spherical plain bearing, so that the durability of the spherical plain bearing can be improved. (3) Since the dust seal is provided outside the lip seal, even if the dust seal is broken and seawater enters,
Since the inside of the dust seal is shielded from light by the dust seal, marine organisms can be prevented from attaching and growing. (4) Equipped with the above lip seal and dust seal
The seal member contacts the inner surface of the backing to prevent buckling.
With a back-up member and the backup
Because it is fixed to the side of the wheel, it is resistant to use in deep water
Can be obtained. (5) The seal member and the backup member are
Since the part of the outer ring is fixed by caulking,
It is very simple and robust.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a spherical plain bearing as a first embodiment of the present invention.

FIG. 2 is a side sectional view of the modification.

FIG. 3 is a side sectional view of a spherical plain bearing as a second embodiment of the present invention.

FIG. 4 is a side sectional view of the modification.

FIG. 5 is a side sectional view of a spherical plain bearing as a third embodiment of the present invention.

FIG. 6 is a side sectional view of the modification.

FIG. 7 is a side sectional view of a modification of the mounting structure of the seal member.

FIG. 8 is a side sectional view of a conventional spherical plain bearing.

[Explanation of symbols]

 1 inner ring 2,4 spherical surface 3 outer ring 5 seal member 6,14 backup member7. A part of the outer ring side that is swaged  8 Space 9 Lip seal 10 Dust seal 11 Lubricant supply hole 12 Second lip seal

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-49-135050 (JP, A) JP-A-59-77617 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16C 33/74

Claims (1)

(57) [Claims] 1. A spherical plain bearing, comprising: an inner ring having an outer peripheral surface formed as a convex spherical surface; an outer ring having an inner peripheral surface formed as a concave spherical surface slidably engaged with the convex spherical surface; is formed includes a lubricant lubricant supply hole capable of supplying to the sliding surface between the convex spherical surface and a concave spherical surface of the sealing member is attached to the side surface of the outer ring, the same sheet seal member, the dust seal with the outside of the lip seal lip seal for preventing leakage of lubricant is protruded formed on one body
There are kicked setting, bar to prevent buckling of the sealing member
So that the backup member contacts the inner surface of the seal member.
And the sealing member is in contact with the backup member.
A spherical plain bearing, wherein a part of the side surface of the outer ring is caulked and fixed .