WO2020196252A1

WO2020196252A1 - Comb cage for self-aligning roller bearing, and self-aligning roller bearing

Info

Publication number: WO2020196252A1
Application number: PCT/JP2020/012274
Authority: WO
Inventors: 夏海宮田; 吉田　和司
Original assignee: Ntn株式会社
Priority date: 2019-03-28
Filing date: 2020-03-19
Publication date: 2020-10-01
Also published as: JP2020159533A; WO2020196252A8

Abstract

Provided is a comb cage for a self-aligning roller bearing, which is formed in a comb geometry by an annular section (5) and a plurality of columnar pieces (6), and in which pockets (7) for retaining barrel-shaped rollers (3) are formed. A pocket-inner surface (6a) of each columnar piece (6) is a cylindrical surface extending perpendicularly, in the cage radial direction at the deepest portion of the inner-race surface (1a). Formed on the outer-diametrical surface of the tip of each columnar piece (6) is a tapered section (9) that tapers cage-inner-diametrically toward the tip forefront. The tapered section (9) begins at a position along the cage axis where the diameter of the rollers (3) is greatest, or from more toward the columnar-piece tip than this axial position. The width of each columnar piece (6), when viewed externally in the cage radial direction toward the center, is narrowest at the tip forefront of the columnar piece (6).

Description

Comb cages for self-aligning roller bearings and self-aligning roller bearings

Related application

This application claims the priority of Japanese Patent Application No. 2019-062305 filed on March 28, 2019, and is cited as a part of the present application by reference in its entirety.

The present invention applies to comb-shaped cages used in self-aligning roller bearings, and bearings using this cage, especially large bearings used in wind power generators, etc., which are heavy and require man-hours for assembly. , And its cage.

In the self-aligning roller bearing, as shown in FIG. 12, rollers 3 are interposed between the

raceway surfaces

1a and 2a of the inner ring 1 and the outer ring 2 in multiple rows, and a cage 4 for holding the rollers 3 is provided for each row. It is provided. The raceway surface 2a of the outer ring 2 is formed on a spherical surface extending over both rows, and the roller 3 is formed in a so-called barrel shape having an outer peripheral surface along the raceway surface 2a of the outer ring 2.

As shown in FIG. 14, the cage 4 is formed in a comb shape with an annular portion 5 and a plurality of pillar portions 6 projecting axially from a plurality of locations in the circumferential direction thereof, and a roller 3 is formed between adjacent pillar portions 6. A pocket 7 is formed to hold the. The pocket inner surface 6a (see FIG. 13), which is a surface forming the pocket 7 of each pillar portion 6, is formed on a cylindrical surface corresponding to the maximum diameter of the roller 3. Each pillar portion 6 projects in the axial direction, but the center c of the pocket inner surface 6a of the cylindrical surface extends in a direction perpendicular to the cage radial direction at the deepest portion of the inner ring raceway surface groove shape, and the pillar portion 6 Tilt against. Therefore, the inner surface 6a of the pillar portion is formed by drilling in the direction along the center of the inclined cylindrical surface.

Japanese Unexamined Patent Publication No. 2005-344748 Japanese Unexamined Patent Publication No. 2006-308043 Japanese Unexamined Patent Publication No. 2017-180831

As described above, since the pocket inner surface 6a of the pillar portion 6 is inclined with respect to the pillar portion 6, the wall thickness of the pillar portion 6 in the circumferential direction of the cage is not uniform. As shown in FIG. 14, the pillar portion 6 has a thinner wall thickness on the inner diameter side than that on the outer diameter side, and has the thinnest wall thickness near the center of the pillar portion and the thickest wall thickness at the tip of the pillar portion on the outer diameter surface. That is, as shown in FIG. 15, when the pillar portion 6 is viewed from the outer diameter side, the vicinity of the center of the pillar portion (the portion e indicated by the arrow) is the thinnest. Further, as shown in FIG. 16, when the pillar portion 6 is viewed from the inner diameter side, the tip of the pillar portion (the portion f indicated by the arrow) is the thinnest.

Further, the cage 4 is designed so that the roller 3 does not fall off after assembling to the bearing, specifically, the roller 3 does not fall beyond the small brim 1b on the end side of the inner ring 1. .. That is, the clearance between the roller 3 and the pillar portion 6 of the cage 4 is managed so that the

small brim

1b and 3 interfere with each other so that the roller 3 does not fall off. As shown in the figure, the portions circled in FIG. 18 are set to interfere with each other.

Therefore, when incorporating the roller 3 into the cage 4, it is necessary to deform the cage 4 to the extent that the roller 3 gets over the small brim 1b, as shown by the broken line in FIG. 18 showing the deformed shape of the pillar portion 6. There is. Since it is deformed in this way, there is a concern that the shape of the cage 4 may collapse, for example, the cylindricity may collapse. A certain amount of force is required to deform a cage made of iron or brass, and the larger the bearing (larger cage) for wind power generators, the greater the burden on the operator.

Note that Patent Document 1 proposes a roller insertion method for roller bearings and a method for eliminating roller built-in scratches in roller bearings. However, this method requires a special jig. Patent Document 2 proposes to improve the assembling property by changing the length of the cage column and providing a groove in the self-aligning roller bearing with a cage. However, this configuration requires machining of a groove. In addition, Patent Document 3 shows a figure in which the outer diameter portion of the tip end portion of the cage column is cut off to form a tapered shape in the double row self-aligning roller bearing. However, there is no description of the technical significance of the tapered portion, and there is no description of the shape of the inner surface of the pocket of the pillar portion, the width of the tip portion of the pillar portion, or the like. Regarding the incorporation of rollers, it is described that a groove is provided in the inner ring to deal with it.

In addition, weight reduction is required for self-aligning roller bearings. In particular, large bearings such as bearings for wind power generators are heavy, so it is required to reduce the weight of the entire bearing. Therefore, the weight of each component is required to be reduced, and the weight of the cage is also required to be reduced.

The present invention solves the above problems, and an object of the present invention is to improve the roller assembling property without deteriorating the roller holding performance, to prevent the shape from collapsing due to deformation of the cage during roller assembling, and to reduce the weight. It is an object of the present invention to provide a comb-shaped cage for self-aligning roller bearings and a self-aligning roller bearing that can be changed.

The comb-shaped cage for self-aligning roller bearings of the present invention is used for double-row self-aligning roller bearings, and has an annular portion whose axial position is located between the raceway surfaces of both rows and the circumferential direction of the annular portion. It is a comb-shaped cage for self-aligning roller bearings that is formed in a comb shape with multiple pillars protruding in the axial direction from multiple locations and has pockets for holding barrel-shaped rollers between adjacent pillars. hand,
The inner surface of the pocket, which is a surface forming the pocket of each of the pillars, is a cylindrical surface extending in a direction perpendicular to the radial direction of the cage at the deepest groove shape of the raceway surface.
The outer diameter of the annular portion is larger than the pitch circle diameter PCD of the arrangement of the rollers, and the inner diameter of the annular portion is smaller than the pitch circle diameter PCD.
A tapered shape portion is formed on the outer diameter surface of the tip of each pillar portion so as to reach the tip end toward the inner diameter side of the cage, and the tapered shape portion is located on the cage axial position having the maximum diameter of the roller. Starting from the tip side of the pillar from this axial position,
The width of each pillar as seen from the outside in the radial direction of the cage toward the center of the cage is the narrowest at the tip of the pillar.

According to this configuration, since the inner surface of the pocket of the pillar portion is a cylindrical surface, the rollers can be reliably held. Since the center of the cylindrical surface, which is the inner surface of the pocket of the column portion, extends in the direction perpendicular to the cage radial direction at the deepest groove shape of the inner ring raceway surface, the tip side is inclined toward the inner diameter side with respect to the extending direction of the column portion. However, if there is no inclined portion as in the conventional product, the width of the pillar portion when the pillar portion is viewed from the outside in the radial direction of the cage toward the center side of the cage is the widest at the cutting edge of the pillar portion. Therefore, the outer diameter of the widened tip of the pillar is obstructed and it is difficult to incorporate the roller into the pocket, and the outer diameter of the wide tip of the pillar does not have a positive effect on strength or functionality. It will be a wasteful part.
In the present invention, by forming a tapered shape portion that goes down to the inner diameter side of the cage on the outer diameter surface of the tip of the pillar portion, the above-mentioned functionally good influence is not exerted, and a waste portion that hinders the incorporation of rollers is eliminated. Therefore, the ease of incorporation of the rollers is improved and the weight of the cage can be reduced. Since the roller can be easily incorporated, it is not necessary to significantly deform the cage during assembly, and the shape of the cage is prevented from being deformed due to the deformation of the cage. The roller retention is ensured by starting the tapered shape portion on the cage axial position which is the maximum diameter of the roller or from the column tip side of the axial position. In this way, it is possible to improve the assembling property of the roller, prevent the shape from being deformed due to the deformation of the cage at the time of assembling the roller, and reduce the weight without deteriorating the holding performance of the roller.

In the comb-shaped cage for self-aligning roller bearings of the present invention, the plurality of column portions may be configured to project from the annular portion to only one side in the axial direction. The cage may be a comb-shaped cage in which the pillar portion extends from the annular portion in both axial directions, but by adopting a configuration in which the pillar portion protrudes only on one side, a large self-aligning roller bearing can be used. Good handleability when applied.

In the comb-shaped cage for self-aligning roller bearings of the present invention, the outer diameter of the annular portion is relative to the pitch circular diameter PCD.
PCD x 102-105%,
The inner diameter of the annular portion is relative to the pitch circle diameter PCD.
PCD x 95-98%,
The length of the portion of the pillar portion constituting the pocket is 65% or less of the roller length.
It may be.
If the length of the pocket component of the pillar is 65% or less of the roller length, the cage mainly holds the rollers so that the performance of the cage is not inferior to that of the conventional product that does not form the tapered shape. It can be designed to minimize the cage volume while ensuring the inner surface of the pocket at the position (maximum roller diameter position). In that case, the outer diameter of the cage is PCD × 102 to 105%, and the inner diameter of the annular portion is PCD × 95 to 98%.

The comb-shaped cage for self-aligning roller bearings of the present invention may be made of an iron-based material. While iron-based materials are tough, they usually require a reasonable amount of force to deform the cage for the incorporation of rollers. Therefore, the effect of improving the assembling property by forming the tapered shape portion of the present invention is effectively exhibited.

The comb-shaped cage for self-aligning roller bearings of the present invention may be made of a brass-based material. Even in the case of brass-based materials, a certain amount of force is usually required to deform the cage for incorporating the rollers. Therefore, the effect of improving the assembling property by forming the tapered shape portion of the present invention is effectively exhibited.

The self-aligning roller bearing of the present invention includes a comb-shaped cage for self-aligning roller bearings having any of the above configurations of the present invention. By using the comb-shaped cage for self-aligning roller bearings of the present invention, it is possible to obtain weight reduction of the entire bearing and highly reliable performance without losing the shape of the cage when the rollers are assembled.

The self-aligning roller bearing of the present invention may be a bearing used for supporting the spindle of a wind power generator. The larger the wind power generator, the more efficient the power generation and the larger the size of the wind power generator. However, the bearing used to support the spindle of such a large wind power generator is inevitably large. Therefore, it is more important to reduce the weight of the bearing as a whole and prevent the shape from collapsing when the rollers are incorporated into the cage. However, by using the comb-shaped cage for the self-aligning roller bearing of the present invention, these weights are reduced. The issues of both conversion and embedding are solved.

The present invention includes any combination of claims and / or at least two configurations disclosed in the specification and / or drawings. In particular, any combination of two or more of each claim is included in the present invention.

The present invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are for illustration and illustration purposes only and should not be used to define the scope of the invention. The scope of the present invention is determined by the appended claims. In the accompanying drawings, the same reference numerals in a plurality of drawings indicate the same or corresponding parts.
It is a partial fracture front view of the self-aligning roller bearing which concerns on one Embodiment of this invention. It is a breaking side view which shows a part in the circumferential direction in the comb type cage of the self-aligning roller bearing. It is a front view of the roller in the self-aligning roller bearing. It is an external perspective view of the comb type cage. It is a partial plan view of the cage. It is a partial fracture plan view of the cage. It is a partially enlarged plan view of the cage. It is a dimensional explanatory drawing of the self-aligning roller bearing. It is a partial perspective view of the same comb type cage. It is a partial perspective view of the conventional comb type cage. It is a partial side view which saw a part of the comb type cage which concerns on this embodiment from the tip side of a pillar part. It is a partial side view which saw a part of the comb-shaped cage which concerns on the prior art example from the tip side of a pillar part. It is a block diagram of the wind power generation apparatus using the self-aligning roller bearing which concerns on the same embodiment. It is a partially broken front view of the conventional self-aligning roller bearing. It is a breaking side view which shows a part in the circumferential direction in the comb type cage of the self-aligning roller bearing. It is a partial perspective view of the conventional comb type cage. It is a partial plan view of the conventional comb type cage seen from the outer diameter side. It is a partial plan view which looked at the conventional comb type cage from the inner diameter side. It is a partial cross-sectional view of the conventional comb type cage. It is explanatory drawing which shows the trouble in assembling the conventional self-aligning roller bearing.

A double row self-aligning roller bearing according to an embodiment of the present invention and a comb-shaped cage used for the bearing will be described with reference to FIGS. 1 to 11.
As shown in FIG. 1, in the double-row self-aligning roller bearing 10, two rows of

rollers

3 and 3 arranged in the axial direction are interposed between the inner ring 1 and the outer ring 2.

Rollers

3 and 3 are held by

cages

4 and 4 for each roller row. This double-row self-aligning roller bearing has a symmetrical shape, and the

cages

4 and 4 on both sides have a symmetrical shape with each other. The raceway surface 2a of the outer ring 2 has a spherical shape that continues across both rows. The inner ring 1 is formed with a plurality of rows of

raceway surfaces

1a and 1a having a cross-sectional shape along the outer peripheral surfaces of the

rollers

3 and 3 in the left and right rows. A brim (small brim) 1b, 1b is provided at both ends of the outer peripheral surface of the inner ring 1, respectively. A middle brim 1c is provided at the center of the outer peripheral surface of the inner ring 1, that is, between the rollers 3 in the left row and the rollers 3 in the right row.

The outer peripheral surfaces of the

rollers

3 and 3 in each row have a cross-sectional shape along the raceway surface 2a of the outer ring 2. In other words, the roller 3 has an outer peripheral surface formed on a curved surface having a rotating body shape in which an arc along the raceway surface 2a of the outer ring 2 is rotated around the center line, and has a so-called barrel shape. The roller 3 may be a symmetrical roller having a maximum diameter at the center of the roller length, or a non-coping roller whose maximum diameter is displaced from the center of the roller length. In the illustrated example, the portion where the roller diameter is maximum (straight line a) is the maximum diameter on the axial center side of the bearing 10 from the center of the roller length (the center of the width of the inner ring raceway surface 1a) b. It is an asymmetric roller in which the point (straight line a) is located.

The cage 4 includes an annular portion 5 whose axial position is located between the inner ring raceway surfaces 1a and 1a in both rows, and a plurality of pillar portions 6 (FIG. 6) that project axially from a plurality of circumferential positions of the annular portion 5. ) And a comb shape. As shown in FIG. 1, the cages 4 in both rows are arranged back to back so as to be in contact with each other at the annular portion 5, and the annular portions 5 are guided by the outer diameter surface of the inner brim 1c of the inner ring 1.

The pillar portion 6 of the cage 4 has a rod-shaped portion having the same basic cross-sectional shape in each length direction, from which a portion corresponding to the inner surface 6a (FIG. 2) of the cylindrical pocket is removed and has a tapered shape at the tip. The shape is such that the portion 9 is provided. The basic cross-sectional shape is a shape including an outer peripheral surface and an inner peripheral surface forming a part of a cylindrical surface, and planar side surfaces on both sides extending in the radial direction. The diameter of the cylindrical surface forming the pocket inner surface 6a is slightly larger than the maximum diameter of the roller 3. The pocket inner surface 6a, which is a surface forming the pocket 7 of the pillar portion 6, is a cylindrical surface whose center line c extends in a direction perpendicular to the straight line a in the radial direction of the cage at the deepest groove shape of the raceway surface 1a of the inner ring 1. .. The deepest portion is a position in the length direction forming the maximum diameter of the roller 3, and the straight line a forms an action line.

The outer diameter, inner diameter, and width of the cage 4 are optimized as follows.
The outer diameter Do of the annular portion 5 of the cage 4 is larger than the pitch circle diameter PCD of the arrangement of the rollers 3, and the inner diameter Di of the annular portion 5 is smaller than the pitch circle diameter PCD.
The outer diameter Do of the annular portion 5 is, for example, PCD × 102 to 105%.
The inner diameter Di of the annular portion 5 is, for example, PCD × 95 to 98%.
The length L of the pillar portion 6, specifically, the length L of the portion forming the pocket 7 of the pillar portion 6 is 65% or less of the roller length L1 (FIG. 3).

The tapered shape portion 9 (FIGS. 4 to 9A) is formed on the outer diameter surface of the tip of the pillar portion 6 so as to decrease (approach) toward the inner diameter side of the cage toward the most advanced end. The tapered shape portion 9 starts on the cage axial position (position of the straight line a) which is the maximum diameter of the roller 3, or from the column portion tip side of the axial position. In other words, the tapered shape portion 9 is formed on the tip side of the pillar portion 6 on the cage axial position (position of the straight line a) which is the maximum diameter of the roller 3.

The tapered shape portion 9 is formed on the pillar portion 6, and the cylindrical pocket inner surface 6a is inclined with respect to the axial direction in which the pillar portion 6 extends, so that the pillar portion 6 is outward in the radial direction of the cage. The width of the pillar portion seen from the center side of the cage is the narrowest at the tip of the pillar portion 6 and has a width W1 (FIG. 7). Further, the radial dimension d (FIG. 8) of the tip surface 6b of the pillar portion 6 is reduced.

To explain a material example, the inner ring 1, the outer ring 2, and the roller 3 are made of bearing steel, and the cage 4 is made of an iron-based material or a brass-based material.

The comb-shaped cage 4 for self-aligning roller bearings is designed to minimize the dimensions of the cage 4 and remove parts that do not affect the function in order to reduce weight and improve ease of incorporation. As a result, the inner diameter, outer diameter, and width of the cage 4 were optimized, and the tip portion of the pillar portion 6 of the cage 4 was cut off diagonally to form a tapered shape portion 9.
In order to optimize the design of the cage 4 without degrading the performance, the following dimensional relationships were used.
Compact design for weight reduction, and to prevent the roller 3 from falling off after installation, by reproducing the bearing assembly state using FME, the inner and outer diameters of the cage will be the optimum design without the roller 3 falling off. The dimensions were determined as described above.

In addition, in order to ensure that the performance of the cage 4 is not inferior to that of the conventional product, the cage 4 is designed to be the minimum while ensuring the pocket size at the position where the roller 3 is mainly held (maximum roller diameter position). The length L (pocket width dimension) of the pillar portion 6 of 4 is set to the length of the roller 3 × 65% or less as described above.
As a result, with respect to the pitch circle diameter PCD of the roller arrangement, as described above,
The outer diameter of the annular portion 5 is PCD × 102 to 105%,
The inner diameter of the annular portion 5 is PCD × 95 to 98%,
Will be.

In addition, the weight is reduced by removing the part of the pillar 6 of the cage 4 that is not related to the roller holding performance and the roller dropping performance, and the size of the entrance when the roller is assembled is made as wide as possible to improve the ease of incorporation. In order to make the shape 9 as described above, the tip portion of the pillar portion 6 of the cage 4 is cut off diagonally from the outer diameter side.
The tapered shape portion 9 secures the roller holding property by starting from the roller maximum diameter position (the position of the straight line a) related to the roller holding property or the column tip side from the position.
As the inclination angle of the tapered shape portion 9 becomes larger, the circumferential width W of the tip portion becomes narrower and the radial thickness d becomes thinner, and the entrance at the time of roller assembling becomes wider. The amount of deformation of the portion 6 is reduced, and the ease of incorporation is improved. However, on the machined surface, it is necessary to leave a flat surface because the drill is applied to the straight surface at the tip of the pillar portion 6 of the cage 4 to proceed with the machining. Therefore, the inclination angle of the tapered shape portion 9 should be set to the maximum angle that does not interfere with machining.
As a result of forming the cage 4 satisfying the above, the shape of the cage 4 is such that the tip of the pillar portion 6 is the narrowest when the pillar portion 6 is viewed from the outer diameter side.

In the conventional cage 4, as shown in FIGS. 9B and 10B, the cage tip surface 6b (halftone dot portion) at the entrance of the cage pocket 7 was large. In the cage 4 (FIGS. 9A and 10A) of this embodiment, the tip is cut off to form a tapered shape portion 9, so that the pillar tip surface 6b (halftone dot portion) at the entrance of the cage pocket is the pillar tip surface of the conventional product. It is smaller than 6b (FIGS. 9B and 10B), and the ease of incorporation is improved.

As described above, according to this configuration, the following advantages are obtained.
-By optimizing the dimensions of each part of the cage 4, the cross section is minimized and the weight of the cage 4 is reduced.
-Since the portion of the tip portion of the pillar portion 6 of the cage 4 that does not affect the function is cut off and the tip portion is made into a tapered shape portion 9, the weight of the cage 4 is reduced.
-Since the portion that does not affect the function of the tip of the pillar 6 of the cage 4 is cut off from the outer diameter side into a tapered shape to form the tapered shape 9, the area of the tip of the pillar 6 of the cage 4 is reduced, and the rollers are rolled during assembly. The size of the entrance part that interferes with 3 increases. Therefore, the assembling property of the roller 3 is improved, the man-hours for assembling the bearing can be reduced, and the burden on the assembling worker can be reduced. Due to the improved ease of incorporation, it is not necessary to significantly deform the cage 4 at the time of assembly, and it is possible to minimize the shape collapse of the cage 4 due to forcibly changing the shape.

FIG. 11 shows an example of a spindle support device of a wind power generation device. The casing 23a of the nacelle 23 is horizontally swivelly installed on the support base 21 via the swivel bearing 22. The spindle 26 is rotatably installed in the casing 23a of the nacelle 23 via the spindle support bearing 25 installed in the bearing housing 24, and the blade 27 serving as a swivel blade is located in a portion of the spindle 26 protruding outside the casing 23a. Is installed. The double row self-aligning roller bearing 10 according to the embodiment is applied to the spindle support bearing 25.
The other end of the spindle 26 is connected to the speed increaser 28, and the output shaft of the speed increaser 28 is coupled to the rotor shaft of the generator 29. The nacelle 23 is swiveled at an arbitrary angle by the swivel motor 30 via the speed reducer 31. Although two spindle support bearings 25 are installed side by side in the illustrated example, one spindle support bearing 25 may be used.

The larger the wind power generator, the more efficient the power generation and the larger the size, but the bearings used to support the spindle of such a large wind power generator are inevitably large. Therefore, it is more important to reduce the weight of the bearing as a whole and prevent the shape from collapsing when the roller is incorporated into the cage. However, by using the comb-shaped cage 4 for the self-aligning roller bearing of this embodiment, These issues of both weight reduction and incorporateability are solved.

Although the embodiments for carrying out the present invention have been described above based on the examples, the embodiments disclosed here are examples in all respects and are not limiting. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 ... Inner ring 1a ... Track surface 1b ... Small brim 1c ... Middle brim 2 ... Outer ring 2a ... Track surface 3 ... Roller 4 ... Cage 5 ... Ring part 6 ... Pillar part 6a ... Pocket inner surface 7 ... Pocket 9 ... Tapered shape part 10 … Self-aligning roller bearing PCD… Pitch circle diameter

Claims

It is used for double-row self-aligning roller bearings, and has an annular portion whose axial position is located between the raceway surfaces of both rows, and a plurality of column portions that project axially from multiple locations in the circumferential direction of this annular portion. A comb-shaped cage for self-aligning roller bearings, which is formed in a mold and has pockets for holding barrel-shaped rollers between adjacent columns.
The inner surface of the pocket, which is the surface forming the pocket of each of the pillars, is a cylindrical surface extending in a direction perpendicular to the radial direction of the cage at the deepest groove shape of the raceway surface of the inner ring.
The outer diameter of the annular portion is larger than the pitch circle diameter PCD of the arrangement of the rollers, and the inner diameter of the annular portion is smaller than the pitch circle diameter PCD.
A tapered shape portion is formed on the outer diameter surface of the tip of each pillar portion so as to reach the tip end toward the inner diameter side of the cage, and the tapered shape portion is located on the cage axial position having the maximum diameter of the roller. Starting from the tip side of the pillar from this axial position,
The width of each pillar as seen from the outside in the radial direction of the cage toward the center of the cage is the narrowest at the tip of the pillar.
Comb cage for self-aligning roller bearings.
The comb-shaped cage for self-aligning roller bearings according to claim 1, wherein the plurality of pillars project from the annular portion to only one side in the axial direction.
In the comb-shaped cage for self-aligning roller bearings according to claim 1 or 2, the outer diameter of the annular portion is relative to the pitch circle diameter PCD.
PCD x 102-105%,
The inner diameter of the annular portion is relative to the pitch circle diameter PCD.
PCD x 95-98%,
The length of the portion of the pillar portion constituting the pocket is 65% or less of the roller length.
Comb cage for self-aligning roller bearings.
The comb-shaped cage for self-aligning roller bearings according to any one of claims 1 to 3, wherein the comb-shaped cage for self-aligning roller bearings is made of an iron-based material.
The comb-shaped cage for self-aligning roller bearings according to any one of claims 1 to 3, wherein the comb-shaped cage for self-aligning roller bearings is made of a brass-based material.
A self-aligning roller bearing provided with a comb-shaped cage for the self-aligning roller bearing according to any one of claims 1 to 5.
The self-aligning roller bearing according to claim 6, which is used for supporting the spindle of a wind power generator.