JPH0361715A - Self-aligning bearing - Google Patents

Abstract

PURPOSE: To automatically align an asymmetrical load by furnishing a ring means furnished with a curved surface concentric with a curved surface on a first annular bearing ring and a second annular bearing ring having a second ring raceway having a bearing rolling member with a first raceway in common. CONSTITUTION: A thrust bearing 20 is furnished with a bearing ring 22 including a bearing raceway 26 on a bearing shaft 24. A bearing ring 30 is furnished with a bearing raceway 32 having a bearing ball 34 in common with the raceway 26. A ring 38 installed on the bearing ring 30 on the side facing the raceway 32 is furnished with a convex 42 of the bearing ring 30 and a concave 40 which are roughly concentric. A spacer furnished with a shim 56 made of a flexible material is provided between the curved surfaces 42, 40. A metal shim 58 and a flexible material such as elastomer 60 are stacked on the shim 56 on a radius 50, and they are a part of the spacer. The flexible shims 56 and 60 are devised so that the raceway 32 can keep the direction parallel and concentric with the raceway 26, and when an asymmetric load is applied between the bearing rings, the bearing is held in a concentric state.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to - self-aligning bearings for boat fishing; This invention relates to a bearing with a shim raceway ring for reducing asymmetrical loads between raceways.

[Conventional technology]

It is well known that misalignment between the races of ball and ball radial bearings and thrust bearings has a deleterious effect on bearing life. In the case of roller bearings, misalignment causes the rollers to tilt and the entire effective length of the rollers does not always come into contact with the raceway. In the case of ball bearings, the load distribution changes between the good and the good.

One self-aligning bearing assembly was manufactured by A. McCloskey (A.
No. 3,993,369 issued November 23, 1976. McCloskey discloses a spherical bearing having an outer member with a concave annular inner surface.

A deformable inner member having a convex outer surface generally complementary to the concave inner surface is held within the outer member by the concave inner surface.

The inner member has a central hole for mounting a threaded mechanical element. In a threaded mechanical element, a nut that applies pressure on both sides of the inner member compresses the inner member laterally,
The inner member is proportionally expanded radially to restore a precision fit with the outer member after wear has occurred between the two members.

If the uniformity of expansion of the inner member is large, a pair of conical bushings is provided. When the bushings are spaced apart in the center hole with their larger diameters facing outward, the bushings are compressed toward each other by the nut such that their conical surfaces push the inner members radially outward. be done.

Another self-aligning bearing was patented on December 12, 1978 by P. Janssen.
No. 4,129,343.

The outer ring of the disclosed radial bearing has a convex outer surface. The bearing is mounted in an outer casing having an internal concavity on one side of the central intermediate plane, which concavity is complementary to the convex external surface of the raceway.

At least one radial end face of the bearing has an axial thrust bearing mounted thereon.

[Problem to be solved by the invention]

It is an object of the present invention to provide an improved self-aligning bearing that self-aligns when asymmetric loads are applied to the axis of the bearing between the inner and outer races of the bearing.

[Means to solve the problem]

The bearing, which may be of the radial or thrust variety, includes a first annular race having a first annular raceway. Ring means attached to the raceway on the side opposite the raceway has a curved surface that is concentric with a curved surface on the first annular raceway.

The curve is shaped to allow for lateral offset along the curve between the first raceway and the ring means.

The bearing includes a second annular raceway having a second annular raceway that shares bearing rolling members with the first raceway.

Spacer means with flexible shim means are placed between the two curved surfaces to allow offset of the first track relative to the ring means to reduce asymmetric loading between the bearing tracks.

〔Example〕

For a more complete understanding of the invention, reference will now be made, by way of example, to the accompanying drawings, in which: FIG.

Before describing in detail the present invention, it will be appreciated that the present invention is capable of other embodiments and of being practiced or carried out in various ways.

It is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the drawings. It was a cabinet. It should be understood that the terminology or terminology used is for purposes of explanation only and not of limitation.

The thrust bearing 20 shown in FIG. 1 includes a raceway ring 22 including a bearing raceway 26 on a bearing shaft 24 . Raceway ring 3
0 is a bearing raceway 32 that shares the raceway 26 and the balls 34 of the bearing.
It is equipped with The raceway ring 30 on the side opposite the raceway 32
The ring 38 attached to the convex curved surface 4 of the bearing ring 30
It has a concave curved surface 40 that is approximately concentric with 2. ring 3
The purpose of 8 is to give a curved surface 40, thus.

Ring 38 may form part of a mechanical component or other component having a surface shaped to provide curved surface 40.

The origin of the radius 50 of the curved surface 42 is above the bearing shaft 24.

Between curved surfaces 42 and 40 is a spacer with a shim 56 made of a flexible material, such as an elastomer. radius 5
The shim 56 on top of the shim 58 is stacked with a flexible material such as a metal shim 58 and an elastomer 60 to form part of the spacer.

Flexible shims 56 and 60 allow mainway 32 to maintain a parallel and concentric orientation with track 26. The loading forces associated with ring 38 keep the bearings aligned when applying asymmetric loads between the races. This correction is accomplished by compression and small lateral displacement between the curved surfaces made possible by the collapse of shims 56 and 60 in response to slightly uneven loads on the bearing.

In the thrust bearing 64 illustrated in FIG. Bearing roller 74 by making it a housing
Keep the load uniform along the line.

A curved surface 78 generated on a radius 8o with its origin on the line (axis 76) holds the spacer 86 by gluing. Spacer 86, made of a flexible material, has a uniform thickness such that surface 88 is parallel to concave curve 78 when unloaded.

A ring 90 forming part of a ceramic housing (not shown) has a concave surface 92 complementary to a convex surface 88 of the spacer.
It has been polished to give a

A spacer 86 is attached to one curved surface 78 and 88. Spacer 86 allows for offset between track 68 and ring 90 to reduce asymmetric loading between the bearing tracks when the bearing carries a load that is not oriented with central axis 76 .

The radial bearing 168 shown in FIG. 3 includes an outer ring 170 that includes an outer raceway 174 on a bearing shaft 172. The radial bearing 168 shown in FIG. Inner ring 178 includes an inner raceway 180 that shares bearing rollers 182 with outer raceway 174 .

Ring 186 , mounted on raceway 170 that is generally concentric with raceway 174 , has a curved surface 190 that is generally concentric with curved surface 192 of outer race 170 . The origin of the radius 202 of the curved surface 192 is an imaginary line 200 drawn through the centers of symmetry 194 and 198 of the rolling contact area of the raceway 174 and iso.
and the bearing shaft 172.

The arc of the curved surface 192 intersects the imaginary line 200.

Between curved surfaces 190 and 192 is a spacer that includes a shim 204 made of a flexible material such as rubber. Shim 204 above radius 202, all-pole shim 2()8 and rubber shim 209
are piled up and part of the spacer is red.

Flexible shims 204 and 209 are attached to raceway 17 to reduce asymmetric loading between the bearing races by compression and small lateral movement.
4 and ring 186.

The tapered roller bearing 216 of FIG. 4, which rests by an inner ring 234 on a shaft 218 having an axis 220i, has a convex curved surface 222 on the outer ring 224 on the side opposite the outer raceway 226 for the bearing rollers 228. The origin of the radius of the curve of the curved surface 222 lies on an imaginary line that is concentric with a line each drawn through the centers of symmetry 230 and 232 of the rolling contact areas of the outer track 226 and the inner track 236, respectively;
The origin is on the shaft of the housing bearing.

A flexible spacer shim 240 has a concave surface 2 on the outer race 224 and ring 246 to allow for misalignment between the raceway 226 and the ring 246 to reduce asymmetric loading between the bearing races.
It is fixed and glued to 42.

The thrust bearing 300 shown in FIG. 5 includes a raceway 322 that rests on a bearing shaft 324 and includes a bearing raceway 326. The thrust bearing 300 shown in FIG. Raceway 330 includes a bearing raceway 332 that shares balls 334 with upper raceway 326 .

A ring 338 attached to the raceway 330 on the side opposite the raceway 332 and generally concentric with the raceway 332 has a convex curved surface 340 that is generally concentric with a concave curved surface 342 of the bearing race 330 .
It is equipped with

Between curved surfaces 342 and 340 is a spacer that includes a shim 356 made of a flexible material such as an elastomer to allow offset between the curved surfaces to reduce asymmetric loading between the bearing tracks.

Although the present invention has been described with respect to particular preferred embodiments, it is intended that various modifications and alterations are contemplated by the invention disclosed herein and that all such modifications and alterations are within the scope of the claims herein. It will be obvious to those skilled in the art that this will be the case.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view of a ball thrust bearing according to the present invention, and FIG. 2 is a partial cross-sectional view of a ball thrust bearing according to the present invention. FIG. 3 is a partial sectional view of the radial bearing of the present invention. FIG. 4 is a partial cross-sectional view of a conical bearing according to the present invention, and FIG. 5 is a partial cross-sectional view of a ball thrust bearing according to the present invention. 22.30 near 0,72:330,332-one raceway ring. 26, 32:66.68; 82.84:332.326
--Orbit, 38.90,338--Ring, 56,60
:86,356--Sim. 58--metal shim, 170,224--outer ring. 178.234--Inner race, 174,226--Outer raceway. 180.236--Inner orbit, 186,246--Ring. 204.209,240--Shim, 208-Ichikinpeng Sim.

Claims (1)

[Claims] 1. A first device comprising a first annular raceway for a bearing rolling member.
a ring means attached to the raceway on opposite sides of the raceway, the ring means and the raceway each having a curved surface, the curved surfaces being concentric with each other, and shaped to permit lateral displacement along a curve between the first raceway and the ring means;
A second annular bearing ring having a second annular raceway for the bearing rolling member; A self-aligning bearing characterized by spacer means for allowing offset between the first track and the ring means. 2. The self-aligning bearing according to claim 1, further characterized in that said spacer means is fixed to said curved surface. 3. The self-aligning bearing of claim 1 further characterized in that said spacer means includes flexible shim means. 4. The self-aligning bearing of claim 3 further characterized in that said spacer means is fixed to said curved surface. 5. The self-aligning bearing of claim 3 further characterized in that said spacer means further comprises metal shim means stacked with said flexible shim means on said radius between said curved surfaces. 6. The self-aligning bearing of claim 3 further characterized in that said spacer means is adhered to one of said curved surfaces. 7. The self-aligning bearing according to claim 5, further characterized in that the curved surface of the ring means comprises a concave surface. 8. The self-aligning bearing of claim 5, further characterized in that the first annular track is fixed and the second annular track is rotatable. 9. The bearing is a radial bearing, and the first and second bearings are
6. The self-aligning bearing of claim 5 further characterized in that the tracks of the bearings are radially separated. 10. The self-aligning bearing of claim 5 further characterized in that the bearing is a thrust bearing and the first and second orbits are in separate parallel planes. 11. The self-aligning bearing according to claim 1, further characterized in that the bearing is a tapered roller bearing.