JP2023180434A - rolling bearing - Google Patents

Abstract

To provide a rolling bearing which is easy in assembling, and can securely arrange rolling bodies and a separator in prescribed orientations and positions, and in which a supplied lubricant is smoothly spread all over in a raceway.SOLUTION: A rolling bearing comprises: an outer ring in which outer ring raceway surfaces are formed at an internal peripheral face, and a first groove is formed between the outer ring raceway surfaces; an inner ring which has a center axis common to the outer ring, and in which inner ring raceway surfaces are formed at an outer peripheral face, and a second groove is formed between the inner ring raceway surfaces; a plurality of rolling bodies constituted of the outer ring raceway surfaces and the inner ring raceway surfaces, and arranged in a raceway path; and a plurality of separators arranged between the rolling bodies. The rolling bearing includes a band-shaped member accommodated in either of the first groove or the second groove. The plurality of separators are fixed to the band-shaped member. A lubricant supply hole for making the groove which is accommodated with the band-shaped member out of the first groove or the second groove and the outside of the roller bearing communicate with each other is formed in the rolling bearing.SELECTED DRAWING: Figure 2

Description

The present invention relates to rolling bearings.

A rolling bearing is known in which an outer ring and an inner ring each have a one-piece integral structure (for example, Patent Document 1). In the rolling bearing disclosed in Patent Document 1, the roller and separator are assembled into the raceway through an assembly hole provided in the outer ring.

A rolling bearing is known in which the inner ring has a one-piece integral structure and the outer ring is constructed by combining split rings divided in the axial direction (for example, Patent Document 2). The cross roller bearing of Patent Document 2 includes an annular retainer housed in a raceway. This retainer is formed by integrally molding a spacer portion disposed between the rollers and a connecting portion connecting the spacer portions. A groove in which lubricant can be stored (lubricant reservoir groove) is formed on the circumferential surface of the spacer. The lubricant injected from the lubricant injection hole provided in the outer ring can be retained in the lubricant reservoir groove of the spacer.

Patent No. 5451988 Patent No. 4173234

It is preferable that a rolling bearing including a separator (spacer) between the rolling elements is easy to assemble and that the rolling elements and the separator can be reliably arranged at predetermined locations. Further, in order to operate the rolling bearing stably for a long period of time, it is desirable that the supplied lubricant spread smoothly within the raceway. Therefore, an object of the present invention is to provide a rolling bearing that is easy to assemble, that makes it easy to reliably arrange rolling elements and separators in a predetermined orientation and position, and that allows supplied lubricant to smoothly spread within the raceway. Make it one.

A rolling bearing according to the present disclosure includes an outer ring in which a pair of outer ring raceway surfaces, which are a pair of mutually orthogonal raceway surfaces, are formed on an inner peripheral surface, and a first groove is formed between the pair of outer ring raceway surfaces; an inner ring having a common center axis with the outer ring, an inner ring raceway surface having a pair of mutually orthogonal inner ring raceway surfaces formed on an outer circumferential surface, and a second groove formed between the pair of inner ring raceway surfaces; It includes a plurality of rolling elements disposed in a raceway formed of an outer ring raceway surface and the inner ring raceway surface, and a plurality of separators arranged between the rolling elements. The rolling bearing includes a band-shaped member accommodated in either the first groove or the second groove. The plurality of separators are fixed to the strip member. The rolling bearing is formed with a lubricant supply hole that communicates between the first groove portion or the second groove portion in which the strip member is accommodated and the outside of the rolling bearing.

According to the above rolling bearing, it is possible to provide a rolling bearing that is easy to assemble, that allows the rolling elements and separators to be easily arranged in a predetermined orientation and position, and that allows the supplied lubricant to smoothly spread within the raceway.

FIG. 1 is a perspective view showing a rolling bearing according to the present disclosure. FIG. 2 is an exploded perspective view showing a rolling bearing according to the present disclosure. FIG. 3 is a perspective view showing a portion of the components constituting the rolling bearing according to the present disclosure. FIG. 4A is a partially enlarged sectional view of a rolling bearing according to the present disclosure. FIG. 4B is a partially enlarged sectional view of the rolling bearing according to the present disclosure. FIG. 5 is a partially enlarged perspective view showing a part of the parts constituting the rolling bearing according to the present disclosure. FIG. 6 is a partially enlarged perspective view showing a part of the parts constituting the rolling bearing according to the present disclosure. FIG. 7 is a perspective view of a separator that constitutes a rolling bearing according to the present disclosure. FIG. 8 is a partially enlarged sectional view of the rolling bearing according to the present disclosure. FIG. 9 is a cross-sectional view of a rolling bearing according to the present disclosure.

[Overview of embodiment]
First, embodiments of the present disclosure will be listed and described. A rolling bearing according to the present disclosure includes an outer ring in which a pair of outer ring raceway surfaces, which are a pair of mutually orthogonal raceway surfaces, are formed on an inner peripheral surface, and a first groove is formed between the pair of outer ring raceway surfaces; an inner ring having a common center axis with the outer ring, an inner ring raceway surface having a pair of mutually orthogonal inner ring raceway surfaces formed on an outer circumferential surface, and a second groove formed between the pair of inner ring raceway surfaces; It includes a plurality of rolling elements disposed in a raceway formed of an outer ring raceway surface and the inner ring raceway surface, and a plurality of separators arranged between the rolling elements. The rolling bearing includes a band-shaped member accommodated in either the first groove or the second groove. The plurality of separators are fixed to the strip member. The rolling bearing is formed with a lubricant supply hole that communicates between the first groove portion or the second groove portion, in which the strip member is accommodated, and the outside of the rolling bearing.

Conventionally, rolling bearings in which a separator is disposed between rolling elements are well known. In the rolling bearing disclosed in Patent Document 1, a roller and a separator are assembled into a raceway through an assembly hole provided in an outer ring. The separator is smaller than the rolling element and has a cylindrical shape. The separator is arranged such that each of its cylindrical end faces abuts an adjacent roller, and its cylindrical side face faces the raceway surface. However, during assembly of the rolling bearing or during operation of the rolling bearing, it was possible for the separator to tip over. Furthermore, in assembling a rolling bearing, further streamlining of the work of assembling rollers and separators in alternately predetermined orientations has been desired.

In the rolling bearing of Patent Document 2, an annular retainer made of resin is proposed. The annular retainer of Patent Document 2 is an integrally molded product in which a plurality of separators (spacer portions) are connected via an annular connecting member. In the rolling bearing disclosed in Patent Document 2, the risk of the separator falling down is eliminated. On the other hand, it was necessary to design a retainer with different dimensions for each size of rolling bearing and to produce a resin molded product with a complicated shape, and the rationality of manufacturing was not necessarily sufficient. Moreover, a lubricant reservoir groove is formed in the separator of Patent Document 2. However, there has been a further need to smoothly supply lubricant supplied from the outside of the rolling bearing into the raceway to achieve long-term lubrication.

In view of this situation, a review was conducted. Consideration has been given to fixing separators built into the trackway to each other. Then, it was discovered that a relief groove formed when forming a raceway surface is utilized, and specifically, a structure is discovered in which a strip-shaped core metal is fitted into the relief groove and a separator is fixed to the core metal. According to this structure, since the separator is fixed, the separator will not fall during assembly or operation. Also, it is easy to assemble. Further, when lubricant is supplied through the lubricant supply hole communicating with the relief groove, the lubricant is transmitted through the core bar and supplied to the entire rolling element and separator. Therefore, the lubricant smoothly spreads throughout the bearing.

In the rolling bearing according to the present disclosure, both the outer ring and the inner ring may be formed of an annular member that is not divided in the axial direction. An assembly hole through which the rolling elements and the separator can pass may be formed in either the outer ring or the inner ring. The lubricant supply hole may be formed in one of the outer ring and the inner ring, and the installation hole may be formed in the other.

That is, in the rolling bearing according to the present disclosure, the outer ring and the inner ring may each be integrated into one piece. When the outer ring and the inner ring are formed in one piece, rigidity and mounting accuracy are improved. Furthermore, by providing a lubricant supply hole in one of the outer ring and the inner ring and providing an assembly hole in the other, a rolling bearing that is easy to assemble and can be smoothly lubricated after assembly can be obtained.

The strip member may have an elongated surface extending in a circumferential direction of the rolling bearing, and an end surface that intersects with the elongated surface at an end of the elongated surface. That is, the band-shaped member may have a discontinuous portion in the circumferential direction instead of having a closed annular shape. With such a configuration, rolling bearings of various diameters can be accommodated by cutting the band member to an appropriate length.

The strip member may include a plurality of protrusions that are provided at regular intervals in the circumferential direction of the rolling bearing and that protrude in the radial direction of the rolling bearing. The separator may be fixed to the protrusion. According to this configuration, a separator having an appropriate shape can be selected and used depending on the number and dimensions of the rolling elements. Further, even when the separator is inserted through the assembly hole of the outer ring or the inner ring, it can be easily fixed by piercing the separator into the protrusion. Therefore, the bearing can be assembled more easily and reliably.

The separator may be made of a porous resin material capable of retaining lubricant. When the separator is made of a porous resin material, the entire separator is impregnated with lubricant and can hold more lubricant. Therefore, lubricity can be maintained for a longer period of time, and maintenance-free operation can be achieved.

The rolling element may be a roller, and the rolling bearing may be a cross roller bearing. In the assembly of crossed roller bearings, it is necessary to incorporate rollers arranged in different orientations. According to the configuration according to the present disclosure, when assembling a rolling bearing, the separator can be assembled and fixed before the rollers, and then the rollers can be inserted between the separators. Therefore, the number, orientation, and position of rollers can be easily determined. According to this configuration, the bearing can be assembled more easily and reliably.

[Specific example of embodiment]
Next, an example of a specific embodiment of the rolling bearing of the present disclosure will be described with reference to the drawings. In the following drawings, the same or corresponding parts are given the same reference numerals, and the description thereof will not be repeated.

FIG. 1 is a perspective view showing the structure of a rolling bearing according to an embodiment of the present disclosure. Referring to FIG. 1, rolling bearing 1 includes an outer ring 10 and an inner ring 20. The outer ring 10 and the inner ring 20 have a common central axis. Inner ring 20 is arranged on the inner peripheral side of outer ring 10. Each of the outer ring 10 and the inner ring 20 is formed into a one-piece integral structure. That is, both the outer ring 10 and the inner ring 20 are so-called integral bearing rings.

The outer ring 10 is provided with a hole 11 that passes through the outer ring 10 in the axial direction. Hole 11 is a mounting hole used to fix outer ring 10 to an external component. A plurality of holes 11 are provided at equal intervals in the circumferential direction. In the example of FIG. 1, ten holes 11 are provided, but the invention is not limited thereto. An oil groove 15 is formed in the outer peripheral surface of the outer ring 10 at the center in the axial direction and is recessed inward from the outer peripheral surface over the entire circumference.

The inner ring 20 is provided with a hole 21 that passes through the inner ring 20 in the axial direction. Hole 21 is a mounting hole used to fix inner ring 20 to an external component. A plurality of holes 21 are provided at equal intervals in the circumferential direction. In the example of FIG. 1, ten holes 21 are provided, but the invention is not limited to this. The inner ring 20 is provided with an assembly hole 52 that penetrates from the inner circumferential surface to the outer circumferential surface. The assembly hole 52 is sealed with a lid 71. Furthermore, a pin hole 53 is formed in the inner ring 20 and passes through the pin hole 53 in the axial direction. A pin 72 is inserted into the pin hole 53, and the pin hole 53 is sealed.

FIG. 2 is an exploded perspective view showing the parts constituting the rolling bearing 1 in an exploded manner. Referring to FIG. 2, the rolling bearing 1 includes an outer ring 10, an inner ring 20, rollers 30 as rolling elements, and a separator assembly 40. When the rolling bearing 1 is assembled, the rollers 30 and the separator assembly 40 are housed between the outer ring 10 and the inner ring 20.

On the inner peripheral surface of the outer ring 10, outer ring raceway surfaces 12a and 12b, which are a pair of raceway surfaces orthogonal to each other, are formed. A relief groove 13 as a first groove is formed between the outer ring raceway surfaces 12a and 12b. A greasing hole 51 serving as a lubricant supply hole is opened in the oil groove 15 on the outer peripheral surface of the outer ring 10 . Greasing holes 51 are provided at two locations on the outer ring. The greasing hole 51 is a hole that communicates with the relief groove 13 from the outer peripheral surface of the outer ring. In the example of FIG. 2, the greasing holes 51 are provided at two locations, but the number of greasing holes 51 is not limited, and is preferably two or more.

On the outer peripheral surface of the inner ring 20, inner ring raceway surfaces 22a and 22b, which are a pair of raceway surfaces orthogonal to each other, are formed. A clearance groove 23 as a second groove is formed between the inner ring raceway surfaces 22a and 22b. On the raceway surface side of the lid 71, surfaces and grooves similar to the inner ring raceway surfaces 22a, 22b and the relief groove 23 are formed. A pin hole 73 is formed in the lid 71 and extends through the lid 71 in the axial direction. The pin hole 73 is provided at a position corresponding to the pin hole 53. After inserting the lid 71 into the inner ring 20, the pin 72 is press-fitted into the pin hole 53 and the pin hole 73 to fix the lid 71.

The rollers 30 include a plurality of first rollers 31 arranged in a first direction and a plurality of second rollers 32 arranged in a second direction. The first rollers 31 and the second rollers 32 are arranged alternately in the circumferential direction. The first roller 31 and the second roller 32 are made of the same material and have the same dimensions, but differ in the direction of arrangement.

The separator assembly 40 includes a core metal 41 as a band-shaped member, a plurality of first separators 42 having a first shape, and a plurality of second separators 43 having a second shape. The first separators 42 and the second separators 43 are arranged alternately in the circumferential direction. The first separator 42 and the second separator 43 have plane-symmetrical shapes, and have the same material and dimensions. Each of the first separator 42 and the second separator 43 is fixed to the core metal 41. That is, the first separator 42 and the second separator 43 are connected in series via the core metal 41. Either the first separator 42 or the second separator 43 is arranged between the first roller 31 and the second roller 32. In some parts, the first separator 42 and the second separator 43 are arranged adjacent to each other.

FIG. 3 is a perspective view showing the separator assembly 40 taken out from the rolling bearing 1. As shown in FIG. Referring to FIG. 3, the core bar 41 is a partially cut-off annular (C-shaped) member. The core metal 41 is made of a wire whose cross section perpendicular to the longitudinal direction is square. The core metal 41 may be made of steel or resin. The core metal 41 is accommodated in the relief groove 13 (FIG. 2) of the outer ring 10. The core metal 41 extends over almost the entire circumference of the escape groove 13 or over the entire circumference. When the rolling bearing 1 operates, the separator assembly 40 interlocks with the rollers 30 and rotates relative to the outer ring 10. For this reason, it is preferable that the core metal 41 does not provide frictional resistance to rotation. The core metal 41 is selected to have a thickness that allows it to rotate within the relief groove 13.

The first separator 42 and the second separator 43 are fixed so as to protrude radially inward from the core metal 41. The first separator 42 and the second separator 43 are arranged at equal intervals in the circumferential direction. The first separator 42 and the second separator 43 are arranged at an interval that allows the first roller 31 or the second roller 32 to be held therebetween. However, at the ends 41x and 41y of the core bar 41, the spacing between the separators is not limited to this. The first separator 42 or the second separator 43 may be fixed near the ends 41x and 41y. This configuration can be adopted when it is preferable to arrange two separators in succession in order to adjust the length of the raceway and the number of rolling elements to be incorporated. When two separators are arranged consecutively, the first separator 42 and the second separator 43 may be adjacent to each other as in the example of FIG. 3 . Furthermore, two separators of the same type may be arranged in succession.

FIG. 4A is a partially enlarged sectional view taken along IVA-IVA in FIG. 1 and showing an enlarged state. FIG. 4A shows a cross section of the rolling bearing 1 taken along the radial direction. Referring to FIG. 4A, outer ring 10 has raceway grooves 17 having a V-shaped cross section formed on the inner circumferential surface. The raceway groove 17 is defined by outer ring raceway surfaces 12a and 12b that are orthogonal to each other. An escape groove 13 is formed at the meeting portion of the outer ring raceway surfaces 12a and 12b. The relief groove 13 is a groove portion that is recessed radially outward from the outer ring raceway surfaces 12a, 12b. The relief groove 13 is formed over the entire circumference of the outer ring 10. The core metal 41 is accommodated in the escape groove 13.

The inner ring 20 has a raceway groove 27 having a V-shaped cross section formed on its outer peripheral surface. The raceway groove 27 is defined by inner raceway surfaces 22a and 22b that are orthogonal to each other. A relief groove 23 is formed at the meeting portion of the inner ring raceway surfaces 22a and 22b. The relief groove 23 is a groove portion that is recessed radially inward from the inner ring raceway surfaces 22a, 22b. The escape groove 23 is formed over the entire circumference of the inner ring 20.

Outer ring raceway surfaces 12a, 12b and inner ring raceway surfaces 22a, 22b face each other to form a raceway path 38. A first roller 31 is arranged on the track path 38 . The first roller 31 has an outer circumferential surface 31c having a cylindrical side surface shape, and circular end surfaces 31a and 31b at both ends of the outer circumferential surface 31c, respectively. The outer peripheral surface 31c rolls on the outer ring raceway surface 12a and the inner ring raceway surface 22b, which are opposing raceway surfaces. The second roller 32 is arranged in a direction perpendicular to the first roller 31. The outer peripheral surface 32c (FIG. 5) of the second roller 32 rolls on the outer ring raceway surface 12b and the inner ring raceway surface 22a, which are opposing raceway surfaces.

FIG. 4B is a partially enlarged sectional view taken along IVB-IVB in FIG. 1 and showing an enlarged state. FIG. 4B shows a cross section of the rolling bearing 1 taken along the radial direction. Referring to FIG. 4B, a second separator 43 is arranged within the trackway 38. The second separator 43 is fixed to the core metal 41. The cross section of the second separator 43 is configured to be smaller than the cross section of the raceway 38, and does not come into contact with the outer ring raceway surfaces 12a, 12b and the inner ring raceway surfaces 22a, 22b. A recessed surface 43b is formed in the second separator, and the second roller 32 is held along the recessed surface 43b.

The outer ring 10 has a greasing hole 51 passing through it in the radial direction. The greasing hole 51 communicates between the outside of the rolling bearing 1 and the relief groove 13 . When lubricant is supplied from the greasing hole 51, the supplied lubricant reaches the core metal 41, travels through the core metal 41, and is supplied to the entire circumference of the core metal 41. It also reaches the first separator 42 and second separator 43 fixed to the core bar 41 . Therefore, the lubricant smoothly spreads throughout the rolling bearing.

FIG. 5 is a partially enlarged perspective view showing the separator assembly 40 and a portion of the first roller 31 and second roller 32 taken out and partially enlarged. Referring to FIG. 5, first roller 31 and second roller 32 are arranged between first separator 42 and second separator 43, respectively. The first separator 42 and the second separator 43 have depressions that match the shapes of the side surfaces of the first roller 31 and the second roller 32. Specifically, the outer peripheral surface 31c of the first roller 31 faces a recessed surface 42a provided on the surface 42A of the first separator 42 and a recessed surface 43a provided on the surface 43A of the second separator 43. The outer peripheral surface 32c of the second roller 32 is arranged between a recessed surface 42b provided on the surface 42B of the first separator 42 and a recessed surface 43b provided on the surface 43B of the second separator 43. By providing depressions on the surfaces of the first separator 42 and the second separator 43, the rollers can be easily placed along the depressions. This configuration prevents placement errors during assembly and the rollers from falling during operation.

FIG. 6 is an enlarged perspective view of the core metal 41, the first separator 42, and a portion of the second separator 43 taken out from the rolling bearing 1. As shown in FIG. Referring to FIG. 6, the core metal 41 includes an elongated main body portion 48 extending in the circumferential direction, and a protrusion portion 45 that protrudes inward in the radial direction from the main body portion 48. The main body portion 48 has a partially interrupted annular shape and includes an elongated surface 41c and end surfaces 41a and 41b facing each other. A plurality of protruding parts 45 are provided at equal intervals in the circumferential direction of the main body part 48. The protruding portion 45 includes a shaft portion 46 that connects to the main body portion 48 and a protruding end portion 47 located at the tip of the shaft portion 46 . By inserting the protrusion 45 into each of the first separator 42 and the second separator 43, the core metal 41 and the first separator 42 and the second separator 43 are fixed.

The materials constituting the first separator 42 and the second separator 43 are not particularly limited, but are preferably materials that can retain lubricant. Specifically, it is preferable that the first separator 42 and the second separator 43 are members made of a porous resin material. For example, a porous resin member has a porous structure formed by filling a mold with fine particles of synthetic resin and heating and molding the mold. Specifically, for example, as the resin member, one obtained by heat-molding fine particles of ultra-high molecular weight polyethylene resin can be used. Regarding the particle size of the ultra-high molecular weight polyethylene resin, for example, a powder having a fine particle size of 30 μm and a coarse particle size of 250 to 300 μm can be used. According to the resin member manufactured in this way, the processing accuracy of the molded product can be made as high as, for example, about ±0.025 mm. As the porous structure, a structure consisting of open pores with a porosity of, for example, 40 to 50% can be used. A lubricant is impregnated into the pores of the porous structure and retained therein. When the material constituting the first separator 42 and the second separator 43 is a porous resin member, the separators can be plastically or elastically deformable. Therefore, the first separator 42 and the second separator 43 can be fixed to the core metal 41 by piercing the protrusion 45 into the separator.

FIG. 7 is a perspective view showing the first separator 42 and the second separator 43 taken out. FIGS. 7A and 7B are views of the first separator 42 and the second separator 43 from different directions. Referring to FIGS. 7(a) and 7(b), the first separator 42 and the second separator 43 have plane-symmetrical shapes, and have the same material and dimensions. The first separator 42 includes a main body portion 81 and an ear portion 82 that is a connection portion with the core metal 41. Similarly, the second separator 43 includes a main body portion 81 ′ and an ear portion 82 ′ that is a connection portion with the core bar 41 . The main body parts 81, 81' have a rectangular parallelepiped shape with a depression formed on the surface. The main body portions 81, 81' have four surfaces facing the outer ring raceway surfaces 12a, 12b and the inner ring raceway surfaces 22a, 22b. Further, the main body portion 81 of the first separator 42 has a surface 42A facing the first roller 31 (FIG. 5) and a surface 42B facing the second roller 32 (FIG. 5). The main body 81' of the second separator 43 has a surface 43A facing the first roller 31 (FIG. 5) and a surface 43B facing the second roller 32 (FIG. 5).

A recessed surface 42a is formed on the surface 42A. The recessed surface 42a is formed so as to come into contact with the outer circumferential surface 31c (FIG. 5) of the first roller 31. The width w1 of the recessed surface 42a at the outer end of the rolling bearing is smaller than the width w2 at the inner end. The surface 43A of the second separator 43 is also formed in the same manner. That is, in the recessed surface 43a of the second separator 43, the width w1 at the outer end of the rolling bearing is smaller than the width w2 at the inner end. By forming in this way, the first roller 31 can be held reliably regardless of the difference in circumferential length between the outer circumferential side and the inner circumferential side of the track path.

A recessed surface 42b is formed in the surface 42B. The recessed surface 42b is formed so as to come into contact with the outer circumferential surface 32c (FIG. 5) of the second roller 32. The width w3 of the recessed surface 42b at the outer end of the rolling bearing is smaller than the width w4 of the inner end. The surface 43B of the second separator 43 is also formed in the same manner. That is, in the recessed surface 43b of the second separator 43, the width w3 at the outer end of the rolling bearing is smaller than the width w4 at the inner end. By forming in this way, the second roller 32 can be held reliably regardless of the difference in circumferential length between the outer circumferential side and the inner circumferential side in the orbit.

FIG. 8 is a partially enlarged sectional view taken along line VIII-VIII in FIG. 1 and showing an enlarged state. FIG. 8 shows a cross section of the rolling bearing 1 taken along the radial direction. Referring to FIG. 8, a mounting hole 52 provided in the inner ring 20 is formed slightly larger than the first roller 31, and the first roller 31 can be inserted through the mounting hole 52. Similarly, the second roller 32 , first separator 42 , and second separator 43 can also be installed through the installation hole 52 .

The rolling bearing 1 can be assembled, for example, by the following procedure. That is, the outer ring 10 is prepared, and the core bar 41 is fitted into the relief groove 13 of the outer ring 10. Next, the inner ring 20 is assembled. Next, the first separator 42, first roller 31, second separator 43, and second roller 32 are sequentially installed through the installation hole 52 of the inner ring 20 according to a predetermined arrangement. At this time, the separator and the core metal are fixed by piercing the first separator 42 and the second separator 43 with the protrusion 45 (FIG. 6) of the core metal 41. By positioning the separator so that the ears 82, 82' (FIG. 7) abut against the core metal 41, the separator can be easily positioned. By incorporating the rollers in accordance with the orientation of the previously incorporated separators, the rollers can be arranged in a predetermined orientation and order. After all the rollers are assembled, the assembly hole 52 is closed with a lid 71, and a pin 72 is press-fitted and fixed.

Since the number of separators is defined by the number of protrusions, mistakes in the number of separators installed can be prevented. Further, by arranging the rollers along the recesses of the separator, the work of assembling the rollers is streamlined, and mistakes in the direction of arrangement of the rollers are prevented. The core metal can be cut to an appropriate length according to the diameter of the outer ring.

(Modified example)
FIG. 9 is a cross-sectional view of a rolling bearing 100 that is a modification of the rolling bearing 1. As shown in FIG. The rolling bearing 100 differs from the rolling bearing 1 mainly in that an assembly hole 152 is provided in the outer ring 110, and that the core metal 141 of the separator assembly 140 is fitted into the relief groove 123 of the inner ring. . Referring to FIG. 9, a core bar 141 is fitted into the escape groove 123 of the inner ring 120. The first separator 142 is fixed to the core metal 141. The first separator 142 is in contact with the second roller 32. The inner ring 120 is provided with a greasing hole 151 through which lubricant can be supplied into the rolling bearing 100 . The supplied lubricant travels along the core metal 141 and smoothly spreads throughout the raceway. When assembling the rolling bearing 100, the rollers and separators can be installed into the raceway through the installation holes 152. The assembly hole 152 is sealed with a lid 171 and fixed with a pin 172.

In addition to the modification shown in FIG. 9, various configuration changes are possible. As some examples of modifications, for example, when the outer ring is provided with an assembly hole and the inner ring is provided with a greasing hole, the greasing hole may be provided in the axial direction so as to communicate with the relief groove from the end surface of the inner ring. Further, the number and arrangement of rollers and separators can be changed depending on the dimensions and load capacity of the bearing. For example, two separators may be consecutively arranged between some rollers. The material of the separator is not limited to a porous resin member, but may be a dense resin member. The manner in which the separator and the core metal are fixed is not limited. The protruding portion of the separator may be in the shape of a thin rod without having a hook portion at the tip. The separator and the core metal may be an integral member.

It should be understood that the embodiments disclosed herein are illustrative in all respects and are not restrictive in any respect. The scope of the present invention is defined not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all changes within the scope.

1, 100 Rolling bearing, 10, 110 Outer ring, 11, 21 Hole, 12a, 12b Outer ring raceway surface, 13, 23, 123 Relief groove, 15 Oil groove, 17, 27 Raceway groove, 20, 120 Inner ring, 22a, 22b Inner ring Raceway surface, 30 Roller, 31 First roller, 32 Second roller, 31a, 31b, End surface, 31c, 32c Outer peripheral surface, 38 Raceway, 40, 140 Separator assembly, 41, 141 Core bar, 41a, 41b End surface, 41c long surface, 41x, 41y end, 42, 142 first separator, 43 second separator, 42A, 42B, 43A, 43B surface, 42a, 42b, 43a, 43b hollow surface, 45 protrusion, 46 shaft, 47 Tip part, 48 Main body part, 51, 151 Greasing hole, 52, 152 Assembling hole, 53, 73 Pin hole, 71, 171 Lid, 72, 172 Pin, 81, 81' Main body part, 82, 82' Ear Department.

Claims (6)

an outer ring in which a pair of outer ring raceway surfaces, which are a pair of raceway surfaces orthogonal to each other, are formed on an inner peripheral surface, and a first groove is formed between the pair of outer ring raceway surfaces;
an inner ring that has a common center axis with the outer ring, has an inner ring raceway surface that is a pair of mutually orthogonal raceway surfaces formed on an outer circumferential surface, and has a second groove formed between the pair of inner ring raceway surfaces;
a plurality of rolling elements disposed in a raceway configured from the outer ring raceway surface and the inner ring raceway surface;
a plurality of separators arranged between the rolling elements;
A rolling bearing comprising:
including a band-shaped member accommodated in either the first groove or the second groove,
The plurality of separators are fixed to the strip member,
A lubricant supply hole is formed that communicates between the first groove or the second groove in which the strip member is accommodated and the outside of the rolling bearing.
Rolling bearing. Both the outer ring and the inner ring are composed of annular members that are not divided in the axial direction,
A built-in hole through which the rolling element and the separator can pass is formed in either the outer ring or the inner ring,
The lubricant supply hole is formed in one of the outer ring and the inner ring, and the incorporation hole is formed in the other.
The rolling bearing according to claim 1. The strip member has an elongated surface extending in the circumferential direction of the rolling bearing, and an end surface that intersects with the elongated surface at an end of the elongated surface.
A rolling bearing according to claim 1 or 2. The band-shaped member includes a plurality of protrusions that are provided at regular intervals in the circumferential direction of the rolling bearing and protrude in the radial direction of the rolling bearing,
the separator is fixed to the protrusion;
The rolling bearing according to claim 1 or 2. The separator is made of a porous resin material capable of retaining lubricant.
The rolling bearing according to claim 1 or 2. The rolling element is a roller,
the rolling bearing is a cross roller bearing;
The rolling bearing according to claim 1 or 2.

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