WO2018199232A1

WO2018199232A1 - Spherical sliding bearing and method for manufacturing same

Info

Publication number: WO2018199232A1
Application number: PCT/JP2018/016991
Authority: WO
Inventors: ゆりえ落合
Original assignee: Ntn株式会社
Priority date: 2017-04-28
Filing date: 2018-04-26
Publication date: 2018-11-01

Abstract

Provided is a spherical sliding bearing configured so that the yield of a material can be improved. This spherical slide bearing comprises a combination of: an inner ring (1) having a spherical sliding surface (2) on the outer periphery thereof; and an outer ring (3) having an inner peripheral surface (4) in sliding contact with the sliding surface (2) of the inner ring (1). The outer ring (3) is formed from a circular-cylindrically formed band-shaped metallic plate. The metallic plate has on one side thereof a recessed surface, the cross-sectional shape of which in a width direction being a circular arc, and the one side serves as the inner peripheral surface (4) of the outer ring (3).

Description

Spherical plain bearing and manufacturing method thereof

The present invention relates to a spherical plain bearing that oscillates while receiving a load and allows an inclination of a shaft and a method for manufacturing the same.

Conventionally, a spherical plain bearing is a combination of an inner ring having a convex spherical sliding surface and an outer ring having a concave spherical sliding surface, which rotates or swings while receiving a load, and has a shaft. It is comprised so that the inclination of may be accept | permitted.

The inner ring of this type of conventional spherical plain bearing is formed by cutting a metal bar or pipe material and forming an outer peripheral surface that forms a convex spherical surface and an inner peripheral surface that forms a cylindrical surface by cutting or grinding. It was made by doing.

Similarly, the outer ring is manufactured by cutting a metal bar or pipe material and forming an outer peripheral surface forming a cylindrical surface and an inner peripheral surface forming a concave spherical surface by cutting, grinding, or the like. (For example, see Patent Document 1 below).

Japanese Utility Model Publication No. 6-14540

In the spherical plain bearing described in Patent Document 1, when manufacturing the inner ring or the outer ring, it is necessary to cut and grind the material until it reaches a predetermined size. In particular, when forming the inner and outer peripheral surfaces of the inner ring or the inner peripheral surface of the outer ring from a solid material such as a bar, there is a problem that the yield of the material is poor because it is necessary to remove many parts of the material. .

Therefore, a problem to be solved by the present invention is to provide a spherical plain bearing capable of improving the yield of materials.

In order to solve the above-mentioned problems, the present invention is a spherical plain bearing comprising a combination of an inner ring having a spherical sliding surface on the outer periphery and an outer ring having an inner peripheral surface that is in sliding contact with the sliding surface of the inner ring. And
The outer ring is formed of a strip-shaped metal plate formed in a cylindrical shape, and the metal plate has a concave surface whose cross-sectional shape in the width direction is an arc on one surface, and the one surface is the outer ring. A configuration having an inner peripheral surface can be employed.

According to this configuration, one surface of the strip-shaped metal plate formed in a cylindrical shape is the concave surface of the outer ring, and the other surface of the metal plate is the outer peripheral surface of the outer ring.

Also, both ends of a cylindrical outer ring made of a metal plate can be widened so that the inner ring can be easily fitted to the inner periphery of the outer ring.

In this configuration, the outer ring includes a cylindrical outer ring member that is fitted to the outer periphery of the outer ring by an interference fit, and the outer ring fitted with the outer ring member has one end portion and the other end portion of each other. The structure which will be in the state which abuts can be employ | adopted.

According to this configuration, the outer ring in which the outer ring member is fitted to the outer peripheral part can be finished so as to be a spherical surface along the sliding surface of the inner ring with respect to the inner peripheral surface. For this reason, the dimensional accuracy of the inner peripheral surface of the outer ring can be improved.

Also, by removing the outer ring member from the outer periphery of the outer ring, the inner ring can be fitted to the inner periphery of the outer ring. Furthermore, the outer ring in which the inner ring is fitted to the inner circumferential part can prevent the inner ring from dropping from the outer ring by fitting the outer ring member to the outer circumferential part.

In order to solve the above-mentioned problems, the present invention is a method for manufacturing a spherical plain bearing comprising an inner ring having a spherical sliding surface on the outer periphery and an outer ring having an inner peripheral surface that is in sliding contact with the sliding surface of the inner ring. And
A concave surface is formed on one surface of the belt-shaped metal plate so that the cross-sectional shape in the width direction is an arc by forging,
The metal plate is bent so that one end and the other end of the metal plate face each other in a state where the concave surface is inside, and the outer ring having the one surface as an inner peripheral surface is formed. ,
Fit the outer ring member to the outer periphery of the outer ring by an interference fit,
Finishing the concave surface of the outer ring to be a spherical surface along the sliding surface of the inner ring,
Removing the outer ring from the outer ring member;
A method in which the inner ring is combined with the inner side of the outer ring can be employed.

After the method, it is possible to employ a method in which the outer ring member is fitted to the outer peripheral portion of the outer ring by an interference fit, and one end and the other end of the outer ring are joined.

In order to solve the above problems, the present invention provides a spherical plain bearing comprising a combination of an inner ring having a spherical sliding surface on the outer periphery and an outer ring having an inner circumferential surface slidably contacting the sliding surface of the inner ring. Because
The inner ring is formed of a strip-shaped metal plate formed in a cylindrical shape, and the metal plate has a convex surface whose cross-sectional shape in the width direction is an arc on one surface, and the one surface is the inner ring. A configuration having a sliding surface can be employed.

According to this configuration, one surface of the strip-shaped metal plate formed in a cylindrical shape is the convex surface of the inner ring, and the other surface of the metal plate is the inner peripheral surface of the inner ring.

The said structure WHEREIN: The said metal plate employ | adopts the structure which the some strip | belt-shaped division body which makes circular arc shape joined to the cylindrical shape, and each said strip | belt-shaped division body has the said convex surface on the one surface. be able to.

In this case, the inner ring can be easily fitted to the inner peripheral portion of the outer ring because the plurality of strip-shaped divided bodies arranged in a cylindrical shape can be joined to form the inner ring at the inner peripheral portion of the outer ring.

Furthermore, a configuration in which the metal plate has a cylindrical surface positioned radially inward of the convex surface on both axial sides of the convex surface, or a configuration in which the inner ring has a circumferential groove on the convex surface is adopted. be able to.

Furthermore, in order to solve the above-described problems, the present invention provides a spherical plain bearing comprising an inner ring having a spherical sliding surface on the outer periphery and an outer ring having an inner peripheral surface slidably contacting the sliding surface of the inner ring. A method,
Form a convex surface on one surface of the band-shaped metal plate so that the cross-sectional shape in the width direction becomes an arc by forging,
Bending the metal plate into a cylindrical shape by abutting one end and the other end of the metal plate with the convex surface on the outside, forming the inner ring having the one surface as the sliding surface ,
Finishing the convex surface of the inner ring to be a spherical surface along the inner peripheral surface of the outer ring,
A manufacturing method in which the inner ring is combined with the inner side of the outer ring can be employed.

In the present invention, the outer ring can form the concave surface which is a spherical surface by performing forging or the like on one surface of the metal plate. For this reason, the part removed by grinding etc. with respect to the material used as an outer ring | wheel reduces, and the improvement of the yield of the material can be aimed at.

Also, the inner ring can form the convex surface which is a spherical surface by performing forging or the like on one surface of the metal plate. For this reason, the part removed by grinding etc. with respect to the material used as an inner ring reduces, and the improvement of the yield of the material can be aimed at.

Longitudinal sectional view of the spherical plain bearing of the first embodiment according to the present invention Longitudinal sectional view showing the outer ring Side view showing the outer ring The perspective view which shows the metal plate used as the outer ring | wheel of a spherical plain bearing same as the above. The perspective view which shows the state which made one surface of the metal plate same as the concave surface The side view which shows the state after cutting both ends of the metal plate used as an outer ring same as the above The perspective view which shows the state before processing the metal plate in FIG. 3B into a cylindrical shape. Side view showing the outer ring The side view which shows the state which fitted the outer ring member to the outer peripheral part of the outer ring same as the above A longitudinal sectional view of a spherical plain bearing of a second embodiment according to the present invention Longitudinal sectional view showing the inner ring Side view showing the inner ring The fragmentary perspective view which shows the metal plate used as an inner ring same as the above Side view showing the state after cutting both ends of the metal plate that is the inner ring of the above The perspective view which shows the state after processing the one surface of the metal plate used as an inner ring same as the above into a convex surface. Partially cutaway perspective view showing the state before bending of the metal plate as the inner ring The division | segmentation perspective view which shows the modification of an inner ring | wheel same as the above. Side view showing a modification of the inner ring Longitudinal sectional view showing an inner ring having a circumferential groove on the outer periphery Longitudinal sectional view showing another modification of the inner ring The perspective view which shows the state before processing the metal plate used as the inner ring | wheel in FIG. 12A to a cylindrical shape.

Hereinafter, a spherical plain bearing according to a first embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the spherical plain bearing 10 according to this embodiment is a combination of an inner ring 1 having a spherical sliding surface 2 on the outer periphery and an outer ring 3 having an inner peripheral surface 4 slidably contacting the sliding surface 2. And an outer ring member 5 fitted to the outer periphery of the outer ring 3.

The inner ring 1 is a convex spherical surface whose outer peripheral surface is a sliding surface 2, and is made of a metallic cylindrical member whose inner peripheral surface is a cylindrical surface. The sliding surface 2 has a circular cross section in the radial direction. The inside of the inner peripheral surface of the inner ring 1 is a bearing hole 6 through which a support shaft (not shown) passes in the axial direction.

Further, the inner ring 1 is a plane in which both side surfaces in the axial direction are parallel to the radial plane, and the interval between the side surfaces is formed wider than the interval between the side surfaces of the outer ring 3.

The outer ring 3 is composed of one strip-shaped metal plate 11 formed in a cylindrical shape, and the inner peripheral surface 4 is a spherical concave surface, and the outer peripheral surface 7 is a cylindrical surface. The inner peripheral surface 4 of the outer ring 3 has a circular cross-sectional shape in the radial direction, and the arc has the same or slightly larger radius of curvature than the arc of the sliding surface 2 of the inner ring 1.

The outer ring member 5 is fitted on the outer peripheral surface 7 of the outer ring 3 by an interference fit. In the outer ring 3 to which the outer ring member 5 is fitted, one end 11b and the other end 11c of the metal plate 11 constituting the outer ring 3 are abutted against each other (see FIG. 4C). In this abutting portion, the inner peripheral surface 4 of the outer ring 3 is a continuous surface having no radial step.

The outer ring 3 is made of a strip-shaped metal plate such as an aluminum alloy, stainless steel, or steel. Further, as will be described later, the outer ring 3 is formed into a cylindrical shape by bending a metal plate 11 so that one surface thereof becomes a concave surface 11a having an arc cross section and the concave surface 11a becomes an inner peripheral surface. It is formed.

The outer ring member 5 is formed in a cylindrical shape, and an inner peripheral surface and an outer peripheral surface thereof are formed in a cylindrical surface. A housing (not shown) for attaching the spherical plain bearing 10 is fitted to the outer peripheral portion of the outer ring member 5.

The material of the inner ring 1 and the outer ring member 5 is not particularly limited, and can be made of a metal such as an aluminum alloy, stainless steel, or steel, a synthetic resin, or a ceramic.

The spherical plain bearing 10 of this embodiment is configured as described above, and both ends of the outer ring 3 made of the cylindrical metal plate 11 can be widened to combine the inner ring 1 inside the outer ring 3. For this reason, the combination of the inner ring 1 and the outer ring 3 becomes easy.

Further, the outer ring 3 is formed by fitting the outer ring member 5 to the outer peripheral surface 7 by an interference fit. The outer ring 3 can be finished on the inner circumferential surface 4 before the inner ring 1 is combined. As a result, the inner circumferential surface 4 of the outer ring 3 can improve the dimensional accuracy as a concave spherical surface.

Further, in the outer ring 3, one surface of the strip-shaped metal plate 11 formed in a cylindrical shape is a concave surface 11 a, and the other surface of the metal plate 11 is an outer peripheral surface 7. The material of the outer ring 3 may be subjected to a finishing process such as a minimum necessary cutting or grinding process for forming the concave surface 11a on one surface of the metal plate 11. For this reason, it becomes possible to reduce the part removed by cutting etc. with respect to the material of the outer ring | wheel 3, and can improve the yield of material.

In this embodiment, the outer ring 3 has the outer ring member 5 fitted on the outer peripheral surface 7 by an interference fit. However, the present invention is not limited to this. For example, as the outer ring 3, the outer ring member 5 can be directly fitted into the housing (not shown) by an interference fit without fitting. Even in this case, the outer ring 3 is in a state in which the one end 11b and the other end 11c of the metal plate 11 constituting the outer ring 3 are abutted with each other.

Next, a method for manufacturing the spherical plain bearing 10 of the first embodiment will be described with reference to the drawings. FIGS. 3A to 3C and FIGS. 4A to 4C are views showing a manufacturing process of the spherical plain bearing 10.

As the manufacturing method, first, as shown in FIG. 3A, a band-shaped metal plate 11 having the same width as the axial width W1 of the outer ring 3 is created. Here, the thickness of the metal plate 11 is the same thickness as the distance a1 between the outer peripheral surface 7 of the outer ring 3 and the minimum inner diameter portion of the inner peripheral surface 4, and for example, the load capacity, the usage environment, and the usage of the spherical plain bearing 10 are used. It can be set by the device.

The strip-shaped metal plate 11 is cut to the same length as the outer peripheral surface circumferential length L1 of the outer ring 3 shown in FIG. 2B. Thereafter, as shown in FIG. 3C, the strip-shaped metal plate 11 is inclined at the angle θ1 inward in the longitudinal direction from the other surface 11d toward the one surface at the one end portion 11b and the other end portion 11c in the length direction. Cutting to the state to do.

The angle θ1 at the one end portion 11b and the other end portion 11c is the same length as the peripheral length L2 of the minimum inner diameter portion of the inner peripheral surface 4 of the outer ring 3 shown in FIG. It is prescribed by that.

Next, as shown in FIG. 3B, a concave surface 11 a is formed by forging so that the cross-sectional shape in the width direction is an arc with respect to one surface of the metal plate 11. At this time, the radius of curvature of the arc that is the cross-sectional shape of the concave surface 11a in the width direction is the same as or slightly larger than the radius of curvature of the sliding surface 2 of the inner ring 1. Thereby, the inner peripheral surface 4 of the outer ring 3 can be in a state along the sliding surface 2 of the inner ring 1.

Subsequently, as shown in FIG. 4A, the outer ring 3 is formed by bending the metal plate 11 into a cylindrical shape by abutting the one end portion 11b and the other end portion 11c with the concave surface 11a inside.

When the bending process is finished and the bending stress is released, the outer ring 3 is in a state in which the one end 11b and the other end 11c are slightly separated as shown in FIG. 4B.

After the bending process, the cylindrical outer ring member 5 is fitted to the outer periphery of the outer ring 3 by interference fitting. At this time, since the outer ring 3 is tightened by the outer ring member 5, the one end part 11b and the other end part 11c of the outer ring 3 are brought into contact with each other (see FIG. 4C).

Then, the concave surface 11 a that becomes the inner peripheral surface 4 of the outer ring 3 is finished so as to be a spherical surface along the sliding surface 2 of the inner ring 1. Here, the outer ring 3 is in a state in which one end portion 11b and the other end portion 11c thereof are abutted with each other.

By finishing the entire circumference of the concave surface 11a including the butted portion, the inner peripheral surface 4 of the outer ring 3 becomes a continuous surface without a step in the radial direction. Note that superfinishing can be performed instead of the finishing, and superfinishing may be performed after finishing.

After finishing, the outer ring member 5 is removed from the outer ring 3, the space between one end 11b and the other end 11c of the outer ring 3 is expanded, the outer ring 3 is expanded, and the inner ring 1 is combined inside. Thus, the inner ring 1 and the outer ring 3 are combined to form a spherical plain bearing 10.

In this spherical plain bearing 10, a housing (not shown) is fitted to the outer periphery of the outer ring 3 by an interference fit. By this fitting, the outer ring 3 is brought into a state where the one end part 11 b and the other end part 11 c are abutted, and the sliding surface 2 of the inner ring 1 can be smoothly slid with respect to the inner peripheral surface 4 of the outer ring 3. .

Note that after the inner ring 1 is combined with the inner side of the outer ring 3, the outer ring member 5 may be fitted to the outer peripheral part of the outer ring 3 by an interference fit, and the one end 11b and the other end 11c of the outer ring 3 may be joined. As this joining method, an existing method such as arc welding or spot welding can be used.

Next, a spherical plain bearing according to a second embodiment of the present invention will be described with reference to FIGS. 5, 6A, and 6B.
The spherical plain bearing 20 of this embodiment includes an outer ring member 5 in that the outer ring 3 is formed of a cylindrical member that is seamless in the radial direction, and the inner ring 1 is formed of a band-shaped metal plate 21 formed in a cylindrical shape. This is different from the first embodiment described above. In other configurations, the same configurations as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIG. 5, the spherical plain bearing 20 of this embodiment includes a combination of an inner ring 1 having a spherical sliding surface 2 on the outer periphery and an outer ring 3 having an inner peripheral surface 4 slidably contacting the sliding surface 2. It will be.

The inner ring 1 is composed of one strip-shaped metal plate 21 formed in a cylindrical shape, and has a sliding surface 2 that is a spherical surface on the outer periphery and an inner peripheral surface that is a cylindrical surface on the inner periphery. The inside of the inner peripheral surface of the inner ring 1 has a bearing hole 6 through which a support shaft (not shown) passes in the axial direction.

As shown in FIG. 6A, the inner ring 1 is a plane in which both side surfaces in the axial direction are parallel to the radial plane, and the axial width W2 defined as the interval between the side surfaces is wider than the interval between the side surfaces of the outer ring 3. It is formed (see FIG. 5).

The inner ring 1 has one end 21b and the other end 21c of a metal plate 21 constituting the inner ring 1 attached to each other (see FIG. 6B). In this abutting portion, the sliding surface 2 of the inner ring 1 is a continuous surface having no radial step.

The inner ring 1 is composed of a strip-shaped metal plate 21 such as an aluminum alloy, stainless steel, or steel. Further, as will be described later, the inner ring 1 is formed so that one surface of the metal plate 21 becomes a convex surface 21a whose cross-sectional shape in the width direction is an arc, and the convex surface 21a becomes a sliding surface 2 Is formed in a cylindrical shape.

The outer ring 3 is made of a metallic cylindrical member having an outer peripheral surface 7 that is a cylindrical surface and an inner peripheral surface 4 that is a concave spherical surface that protrudes radially outward. The inner peripheral surface 4 of the outer ring 3 has a circular cross section in the radial direction. The arc of the inner peripheral surface 4 of the outer ring 3 has the same or slightly larger radius of curvature than the arc of the sliding surface 2 of the inner ring 1.

The material of the outer ring 3 is not particularly limited, and for example, a metal such as an aluminum alloy, stainless steel, or steel, a synthetic resin, or a ceramic can be employed.

As described above, the spherical plain bearing 20 of the second embodiment is configured, and in the inner ring 1, one surface of the strip-shaped metal plate 21 formed in a cylindrical shape becomes a convex surface 21 a, and the other surface of the metal plate 21. Is the inner surface.

The material of the inner ring 1 may be subjected to a finishing process such as a minimum necessary cutting or grinding process for forming the convex surface 21a on one surface of the metal plate 21. This makes it possible to reduce the portion to be removed and improve the material yield.

Next, a method for manufacturing the spherical plain bearing 20 of the second embodiment will be described with reference to the drawings. 7A, FIG. 7B, FIG. 8A, and FIG. 8B are diagrams showing manufacturing steps of the spherical plain bearing 20.

As the manufacturing method, first, as shown in FIG. 7A, the inner ring 1 has the same width as the axial width W2, and the distance between the inner peripheral surface of the inner ring 1 and the maximum outer diameter portion of the sliding surface 2 is as follows. A strip-shaped metal plate 21 having the same thickness as a2 is created. The strip-shaped metal plate 21 is cut to the same length as the sliding surface circumferential length L3 at the maximum outer diameter portion of the sliding surface 2 of the inner ring 1 shown in FIG. 6B.

After that, as shown in FIG. 7B, the band-shaped metal plate 21 is inclined inward in the length direction from one surface to the other surface 21d at one end 21b and the other end 21c in the length direction. Cutting in an inclined state.

The angle θ2 at the one end 21b and the other end 21c is defined by setting the length on the other surface 21d side of the metal plate 21 to the same length as the inner peripheral surface circumferential length L4 of the inner ring 1 shown in FIG. 6B. Is done.

Subsequently, as shown in FIG. 8A, a convex surface 21a is formed on one surface of the metal plate 21 by forging so that the cross-sectional shape in the width direction becomes an arc.

Thereafter, as shown in FIG. 8B, the metal plate 21 is bent into a cylindrical shape by abutting the one end 21b and the other end 21c with the convex surface 21a facing outward.

After bending, the one end 21b and the other end 21c of the inner ring 1 are joined together by welding in a state where they are butted. The convex surface 21a of the joined inner ring 1 is finished so as to be a spherical surface along the inner circumferential surface 4 of the outer ring 3, thereby forming the inner ring 1 (see FIG. 6B).

Here, the inner ring 1 is in a state where the one end 21b and the other end 21c are abutted against each other. By finishing the entire circumference of the convex surface 21a including the abutting portion, the sliding surface 2 of the inner ring 1 becomes a continuous surface without a step in the radial direction. Note that superfinishing can be performed instead of the finishing, and superfinishing may be performed after finishing.

After finishing, the inner ring 1 is combined with the inner side of the outer ring 3 while sliding the sliding surface 2 of the inner ring 1 on the inner peripheral surface 4 of the outer ring 3. A spherical plain bearing 20 is configured by this combination.

In the manufacturing method of the inner ring 1, the thickness of the metal plate 21 is the same as the distance a <b> 2 between the inner peripheral surface of the inner ring 1 and the maximum outer diameter portion of the sliding surface 2. When such a metal plate 21 is bent into a cylindrical shape, the other surface 21 d of the metal plate 21 becomes the inner peripheral surface of the inner ring 1.

For this reason, it is only necessary to perform a finishing process such as a minimum cutting or grinding process for forming the convex surface 21 a on one surface of the metal plate 21, and the metal plate 21 that is a material of the inner ring 1. It is possible to reduce a portion to be removed by cutting or the like, and the yield of the material of the inner ring 1 can be improved.

In addition, although the inner ring | wheel 1 of this embodiment consists of the one strip | belt-shaped metal plate 21 formed in the cylindrical shape, it is not restricted to this. For example, as a modification of the inner ring 1, as shown in FIG. 9, a band-shaped metal plate 21 is formed from three band-shaped divided bodies 22 having an arc shape, and each band-shaped divided body 22 is in a cylindrical shape. The inner ring 1 shown in FIG. 10 can also be configured by joining together by welding.

Further, in the inner ring 1, one end portion 21b and the other end portion 21c of a single band-shaped metal plate 21 formed in a cylindrical shape are joined by welding, but the joining means is not limited to welding. . For example, as shown in FIG. 11, the inner ring 1 may have a circumferential groove 1 a formed on the entire circumference of the sliding surface 2. The one end 21b and the other end 21c of the metal plate 21 can be joined by the fixed band 30 wound around the circumferential groove 1a.

Further, the inner ring 1 has a sliding surface 2 on the entire outer peripheral surface, but is not limited thereto. For example, as another modification of the inner ring 1, as shown in FIG. 12A,

cylindrical surfaces

23a and 23a may be provided on both sides in the axial direction of the sliding surface 2. In this case, as shown in FIG. 12B, the metal plate 21 is integrally formed with a protruding portion 23 that protrudes outward in the width direction over the entire length of the convex surface 21 a that becomes the sliding surface 2.

When the metal plate 21 on which the protruding portions 23 are formed is bent into a cylindrical shape, the outer peripheral surfaces of the protruding portions 23 become

cylindrical surfaces

23a and 23a. The cylindrical surface 23 a is located on the radially inner side with respect to the convex surface 21 a serving as the sliding surface 2. By winding the fixing band 30 around each of the cylindrical surfaces 23a, the one end 21b and the other end 21c of the metal plate 21 can be joined to each other.

DESCRIPTION OF SYMBOLS 1 Inner ring 1a Circumferential groove 2 Sliding surface 3 Outer ring 4 Inner peripheral surface 5 Outer ring member 6 Bearing hole 7 Outer

peripheral surface

10, 20 Spherical

plain bearing

11, 21 Metal plate

11a Concave surface

11b, 21b One

end part

11c, 21c The other end part 11d 21d The other surface 21a Convex surface 22 Strip-like divided body 23 Protruding portion 23a Cylindrical surface 30 Fixed band a1, a2 Distance L1 Peripheral length L2 Perimeter L3 Sliding surface perimeter L4 Inner peripheral perimeter W1, W2 Axial width θ1 , Θ2 angle

Claims

It consists of a combination of an inner ring (1) having a spherical sliding surface (2) on the outer periphery and an outer ring (3) having an inner peripheral surface (4) in sliding contact with the sliding surface (2) of the inner ring (1). A spherical plain bearing (10),
The outer ring (3) is composed of a strip-shaped metal plate (11) formed in a cylindrical shape, and the metal plate (11) has a concave surface (11a) whose cross-sectional shape in the width direction is an arc on one surface. A spherical plain bearing in which the one surface is an inner peripheral surface (4) of the outer ring (3).
The outer ring (3) includes a cylindrical outer ring member (5) fitted to the outer peripheral portion thereof by an interference fit, and the outer ring (3) fitted with the outer ring member (5) has one end thereof. The spherical plain bearing according to claim 1, wherein the portion (11b) and the other end portion (11c) are brought into contact with each other.
Spherical slip consisting of an inner ring (1) having a spherical sliding surface (2) on the outer periphery and an outer ring (3) having an inner peripheral surface (4) in sliding contact with the sliding surface (2) of the inner ring (1). A bearing manufacturing method comprising:
A concave surface (11a) is formed on one surface of the strip-shaped metal plate (11) by forging so that the cross-sectional shape in the width direction is an arc,
Bending the metal plate (11) into a cylindrical shape by abutting the one end (11b) and the other end (11c) of the metal plate (11) with the concave surface (11a) on the inside, Forming the outer ring (3) having the one surface as an inner peripheral surface (4);
The outer ring member (5) is fitted to the outer periphery of the outer ring (3) by an interference fit,
Finishing the concave surface (11a) of the outer ring (3) to be a spherical surface along the sliding surface (2) of the inner ring (1),
Removing the outer ring (3) from the outer ring member (5);
A method of manufacturing a spherical plain bearing in which the inner ring (1) is combined inside the outer ring (3).
The outer ring member (5) is fitted to the outer periphery of the outer ring (3) by an interference fit, and one end (11b) and the other end (11c) of the outer ring (3) are joined. Of manufacturing spherical plain bearings.
It consists of a combination of an inner ring (1) having a spherical sliding surface (2) on the outer periphery and an outer ring (3) having an inner peripheral surface (4) in sliding contact with the sliding surface (2) of the inner ring (1). A spherical plain bearing (20),
The inner ring (1) includes a strip-shaped metal plate (21) formed in a cylindrical shape, and the metal plate (21) has a convex surface (21a) whose cross-sectional shape in the width direction is an arc on one surface. A spherical plain bearing in which the one surface is the sliding surface (2) of the inner ring (1).
The metal plate (21) is formed by joining a plurality of strip-shaped divided bodies (22) having an arc shape in a cylindrical shape, and each of the strip-shaped divided bodies (22) has the convex surface ( Spherical plain bearing according to claim 5 having 21a).
The said metal plate (21) has the cylindrical surface (23a) located in a radial inside rather than the convex surface (21a) in the axial direction both sides of the said convex surface (21a) in said one surface. Spherical plain bearing.
The spherical plain bearing according to claim 5 or 6, wherein the inner ring (1) has a circumferential groove (1a) on its convex surface (21a).
Spherical slip consisting of an inner ring (1) having a spherical sliding surface (2) on the outer periphery and an outer ring (3) having an inner peripheral surface (4) in sliding contact with the sliding surface (2) of the inner ring (1). A bearing manufacturing method comprising:
A convex surface (21a) is formed on one surface of the belt-shaped metal plate (21) so that the cross-sectional shape in the width direction is an arc by forging,
Bending the metal plate (21) into a cylindrical shape by abutting one end (21b) and the other end (21c) of the metal plate (21c) with the convex surface (21a) on the outside, Forming the inner ring (1) having one surface as a sliding surface (2);
Finishing the convex surface (21a) of the inner ring (1) to be a spherical surface along the inner peripheral surface (4) of the outer ring (3),
A method of manufacturing a spherical plain bearing in which the inner ring (1) is combined inside the outer ring (3).
Before the bending process, both end portions (21b, 21c) of the strip-shaped metal plate (21) are formed so as to be inclined inward in the longitudinal direction from the one surface to the other surface (21d). A method for manufacturing a spherical plain bearing according to claim 9.