CN110998112B

CN110998112B - Rolling bearing and retainer

Info

Publication number: CN110998112B
Application number: CN201880050178.3A
Authority: CN
Inventors: 室昂佑
Original assignee: JTEKT Corp
Current assignee: JTEKT Corp
Priority date: 2017-08-03
Filing date: 2018-07-31
Publication date: 2022-06-28
Anticipated expiration: 2038-07-31
Also published as: TW201910655A; JP2019027572A; KR20200029496A; JP7009821B2; WO2019026875A1; KR102393018B1; CN110998112A; TWI726224B; DE112018003967T5

Abstract

The holder is provided with: a holder body having a first annular body and a plurality of posts; a second annular body; and a shaft member for connecting the cage body and the second annular body. The plurality of columns includes: a first column having a through hole through which the shaft member is inserted; and a second post having a claw at an end portion on one side in the axial direction. The second ring-shaped body has a recess for accommodating the pawl at a portion connected to the second column, and a projection for engaging with the pawl is provided at a portion of the recess.

Description

Rolling bearing and retainer

Technical Field

The present invention relates to a rolling bearing and a cage for holding rolling elements of the rolling bearing.

Background

A rolling bearing is widely used in various fields to support a shaft, and generally includes an inner ring, an outer ring, a plurality of rolling elements provided between the inner ring and the outer ring, and an annular cage for holding the rolling elements.

As a cage provided in such a rolling bearing, there is a cage made of brass, for example, and assembled by rivets 91 as shown in fig. 8 (see, for example, patent document 1). Fig. 8 is a perspective view showing a part of such a retainer 99. The retainer 99 includes a retainer body 96 and an annular second ring-shaped body 95, the retainer body 96 includes an annular first ring-shaped body 98 and a plurality of columns 97 extending in the axial direction from the first ring-shaped body 98, and the second ring-shaped body 95 is provided on one axial side of the plurality of columns 97. The space 94 between the first ring 98 and the second ring 95 and between the circumferentially

adjacent columns

97, 97 serves as a pocket for holding the rolling elements, not shown.

In the holder main body 96, the first hole 93, which is long in the axial direction and through which the shaft portion 91b of the rivet 91 is inserted, is formed in all of the post 97 and the portion 98a of the first annular body 98 coupled to the post 97. Second holes 92 penetrating in the axial direction are formed in the second ring-shaped body 95 at the same circumferential pitch as the columns 97. The shaft portion 91b of the rivet 91 is inserted into the first hole 93 and the second hole 92, and the end portion 91a of the rivet is riveted, whereby the holder body 96 and the second annular body 95 are integrated.

Prior art documents

Patent document

Patent document 1: japanese patent laid-open No. 2001-323934

Disclosure of Invention

Problems to be solved by the invention

The diameter of the shaft portion 91b of the rivet 91 is, for example, about 2 mm, and the diameter of the first hole 93 formed in the holder body 96 and the diameter of the second hole 92 formed in the second annular body 95 are slightly larger than the diameter of the shaft portion 91 b. In order to form the first hole 93 in the holder main body 96, it is necessary to pass a tool through the column 97 and the first annular body 98 in the axial direction, but the formed first hole 93 is difficult to machine because it has a small diameter and is long in the axial direction, and the tool is thin and may break. Further, such hole processing needs to be performed for all the columns 97, and there is a problem that the manufacturing of the retainer 99 is difficult. Even when the hole machining is completed, the same number of rivets 91 as the columns 97 need to be riveted one by using a hammer or the like, which requires labor and time for assembly.

The retainer 99 includes, for example, about 12 to 20 columns 97 (depending on the model), and as the number of columns 97 increases, the number of steps required for manufacturing (hole processing) and assembling work increases.

Accordingly, an object of an aspect of the present invention is to provide a cage and a rolling bearing including the same, which can reduce the labor and time required for the hole processing and the connecting work for connecting the cage main body and the second annular body, and which can reduce the number of manufacturing and assembling steps.

Means for solving the problems

In one aspect of the present invention, there is provided: a holder body having a first annular body and a plurality of columns extending from the first annular body to one axial side; a second annular body disposed on one axial side of the plurality of columns; and a shaft member, the number of which is smaller than the number of the columns, for connecting the cage body and the second annular body so as to pass through the cage body and the second annular body in an axial direction, wherein a pocket for holding the rolling element is formed in a space between the first annular body and the second annular body and between the columns adjacent in a circumferential direction, the plurality of columns includes a first column and a second column, the first column is formed with a through hole through which the shaft member is inserted, the second column has a pawl at an end portion on one side in the axial direction, the second annular body has a recess for receiving the pawl at a portion connected to the second column, and a projection for engaging with the pawl is provided in the recess.

According to this retainer, the plurality of posts includes the first post that is connected to the second annular body by the shaft member penetrating therethrough and the second post that is connected to the second annular body by the engagement of the pawl and the projection. That is, in order to connect the retainer body and the second annular body, it is not necessary to insert the shaft member into all the columns, and it is only necessary to insert the shaft member into a first column that is a part of the plurality of columns and engage the pawl with the protrusion in the other second column. Thus, it is not necessary to form through holes through which the shaft members are inserted in all the columns and the portions of the first annular body and the second annular body corresponding to all the columns. Therefore, the work and time required for the hole processing or the connecting work by the shaft member for connecting the cage main body and the second annular body by the shaft member can be reduced, and the man-hours for manufacturing and assembling the cage can be reduced. In addition, as an example of the "connecting work by the shaft member", for example, in the case where the shaft member is a rivet, the connecting work is a caulking work.

Preferably, the plurality of columns further includes a third column having an end surface on one axial side that is contactable with a surface on the other axial side of the second annular body and is in a non-coupled state with the second annular body. According to this configuration, since the plurality of columns includes the third column in addition to the first column and the second column, the number of parts for connecting the retainer body and the second annular member using the shaft member can be further reduced, and the number of manufacturing and assembling steps of the retainer can be further reduced.

Preferably, the recess includes a gap into which the claw can be inserted in an axial direction at a position adjacent to one side of the projection in a circumferential direction. According to this configuration, when the holder body and the second ring-shaped body are combined, the claws of the second column of the holder body are inserted from the axial direction into the gaps provided in the recesses of the second ring-shaped body, and then, when the second ring-shaped body is rotated to one side in the circumferential direction with respect to the holder body, the claws can be engaged with the protrusions. Further, if the holder body and the second annular body are coupled to each other by a shaft member penetrating the first post in a state where the claws are engaged with the projections, the holder body and the second annular body cannot rotate in the circumferential direction, and the claws are not disengaged from the projections. Thus, according to the above configuration, the assembly of the retainer by the engagement of the claws and the protrusions becomes easy, and when the assembly is completed, the retainer body and the second annular body are mechanically coupled by the engagement of the claws and the protrusions, whereby the rigidity of the retainer is improved.

Preferably, the recess is open to a radially outer side or an inner side and the other axial side, the projection has a first surface facing one axial side, a second surface facing the radial direction, and a third surface facing the other axial side, the pawl has a fourth surface facing the first surface and a fifth surface facing the second surface, and an end surface of the second column on one axial side faces the third surface and protrudes from the end surface. According to this configuration, the respective surfaces of the claw and the respective surfaces of the protrusion face each other, and thus the protrusion engages with the claw, and the holder body and the second annular body cannot be separated in the axial direction.

In another aspect of the present invention, a rolling bearing includes: an inner ring; an outer ring; a plurality of rolling bodies disposed between the inner ring and the outer ring; and an annular retainer for holding the plurality of rolling elements, the retainer having the above-described respective configurations.

According to this rolling bearing, in manufacturing and assembling the cage, the labor and time required for the hole processing for connecting the cage main body and the second annular body by the shaft member or the connecting work by the shaft member can be reduced, and the number of man-hours can be reduced.

Effects of the invention

According to the aspect of the present invention, in manufacturing and assembling the cage, the labor and time required for the hole processing for coupling the cage main body and the second annular body with the shaft member or the coupling operation with the shaft member can be reduced, and the number of man-hours can be reduced. As a result, it is possible to contribute to cost reduction of the cage (cost reduction of the rolling bearing).

Drawings

Fig. 1 is a sectional view of a rolling bearing.

Fig. 2 is a view of a state where the annular retainer is developed planarly, and is a view when viewed from the radial outside.

Fig. 3 is a view of the holder body as viewed from the axial side.

Fig. 4 is a perspective view showing a part of the second column and the second ring member.

Fig. 5 a and 5B are cross-sectional views of a part of the holder as viewed in the circumferential direction, where fig. 5 a shows a state before the claw is engaged with the protrusion (non-engaged state), and fig. 5B shows a state where the claw is engaged with the protrusion.

Fig. 6 is a view of a part of the retainer as viewed from the axial side.

Fig. 7 is a diagram showing a modification of the claw of the second column and the projection of the recess of the second ring-shaped body.

Fig. 8 is a perspective view showing a part of a conventional retainer.

Detailed Description

Fig. 1 is a sectional view of a rolling bearing. The rolling bearing 10 includes an inner ring 11, an outer ring 12, a plurality of rolling elements provided between the inner ring 11 and the outer ring 12, and an annular cage 14 for holding the plurality of rolling elements. The rolling elements in the present embodiment are cylindrical rollers 13, and the rolling bearing 10 is a cylindrical roller bearing.

The inner ring 11 of the present embodiment has a cylindrical inner ring main body 15 and an annular flange ring 16, and the inner ring 11 is configured by arranging the flange ring 16 on one axial side of the inner ring main body 15 and combining them. An inner ring raceway surface 17 on which the cylindrical rollers 13 are in rolling contact is formed on the outer peripheral side of the inner ring main body 15, and an inner flange portion 18 protruding outward in the radial direction is provided on the other axial side of the inner ring main body 15. The outer ring 12 of the present embodiment is cylindrical, and an outer ring raceway surface 19 that is in rolling contact with the cylindrical rollers 13 is formed on the inner circumferential side.

Outer flange portions

19a and 19b protruding radially inward are provided on one side and the other side in the axial direction of the outer ring 12. In the present embodiment, the cylindrical rollers 13 are arranged in two rows in the axial direction. The two rows of cylindrical rollers 13 are held by a cage 14. The inner ring 11, the outer ring 12, and the cylindrical rollers 13 are made of, for example, bearing steel. The rolling bearing 10 shown in fig. 1 is used as a bearing for thrust of a work roll in a steel rolling mill.

Fig. 2 is a view of the annular holder 14 in a flat state, as viewed from the radially outer side. As shown in fig. 1 and 2, the holder 14 has a two-part structure. That is, the retainer 14 includes: a holder body 20 having a first annular body (first annular portion) 21 and a plurality of columns (pillar portions) 22 extending from the first annular body 21 to one axial side; and a second annular body 30 provided on one axial side of the plurality of columns 22. The first annular body 21 is annular, and the column 22 extends linearly from one axial side of the first annular body 21 toward one axial side. The second ring member 30 is an annular member. The holder main body 20 and the second annular body 30 of the present embodiment are made of copper alloy (brass), but may be made of other metal materials. The holder body 20 and the second annular member 30 are formed of separate members, and are integrally coupled by the rivets 23 (see fig. 2) and the engagement of the claws 31 with the projections 34, which will be described later.

In fig. 2, the cage 14 includes the rivet 23 as a shaft member for axially penetrating and coupling the cage body 20 and the second annular body 30. The rivet 23 has a linear shaft portion 24 and an enlarged-diameter head portion 25 provided on one axial side of the shaft portion 24. The shaft portion 24 is inserted into the through hole 28 provided in the second annular member 30 and the through hole 27 provided in the holder main body 20, and the end portion on the other axial side is caulked (plastically deformed) to form the caulked portion 26 having an enlarged diameter, whereby the holder main body 20 and the second annular member 30 cannot be separated from each other. Instead of the rivets 23, elongated bolts, not shown, may be used as another shaft member, the bolts may be inserted through the through

holes

27 and 28, and the holder body 20 and the second annular body 30 may be coupled to each other by a bolt head on one axial side and a nut screwed to the bolt on the other axial side.

The first through hole 27 of the holder body 20 axially penetrates the first annular body 21 and the column 22. In the present embodiment, the first through holes 27 are provided at three locations (see fig. 3) in the same number as the rivets 23, and will be described later.

The second through hole 28 axially penetrates the second annular body 30. In the second ring member 30, the number of the second through holes 28 is the same as that of the first through holes 27, and the second through holes 28 are provided at the same positions in the circumferential direction as the first through holes 27.

The through holes 27 and 28 are holes having a diameter slightly larger than the diameter of the shaft portion 24 of the rivet 23. The post 22 through which the shaft 24 of the rivet 23 penetrates is referred to as a first post 22 a. As shown in fig. 2, the holder 14 includes a second column 22b and a third column 22c in addition to the first column 22 a. The structure of the second column 22b and the third column 22c will be described later.

Fig. 3 is a view of the holder body 20 as viewed from the axial side. The holder body 20 of the present embodiment has 15 columns 22, and the number of the first columns 22a forming the through holes 27 is 3. The first columns 22a are arranged uniformly in the circumferential direction (120 degrees apart in the present embodiment). Further, 6 of the 15 columns 22 are second columns 22b, and the remaining 6 are third columns 22 c. A second column 22b and a third column 22c are provided between one first column 22a and the other first column 22 a. In the present embodiment, 2 second columns 22b and 2 third columns 22c are provided between one first column 22a and the other first column 22 a. The number of the columns 22 varies depending on the type (size) of the rolling bearing 10, and the number and circumferential arrangement of the first, second, and

third columns

22a, 22b, and 22c may be other than those shown in fig. 3. However, it is preferable that the first columns 22a and the second columns 22b are dispersed in the circumferential direction (uniformly arranged), respectively, and as shown in fig. 3, a plurality of (2) second columns 22b may be grouped and dispersed in the circumferential direction (uniformly arranged).

As shown in fig. 2 and 3, the second column 22b has a claw 31 at one end in the axial direction. Fig. 4 is a perspective view showing a part of the second column 22b and the second ring member 30. A recess 33 for accommodating the pawl 31 is formed in a portion 32 of the second ring member 30 connected to the second column 22b, and a projection 34 for engaging with the pawl 31 is provided in a part of the recess 33. The recesses 33 (and the protrusions 34) are provided at the same number as the second columns 22b and at the same positions in the circumferential direction as the second columns 22 b. The claws 31 of the second columns 22b of the holder body 20 engage with the projections 34 formed in the recesses 33 of the second annular member 30, whereby the holder body 20 and the second annular member 30 are coupled to each other so as to be inseparable from each other in the axial direction.

As shown in fig. 4, in the second ring member 30, the recess 33 is open at least to the radially outer side and the other side in the axial direction, and in the present embodiment, is also open to one side in the axial direction. That is, the recess 33 penetrates the second annular member 30 in the axial direction with the inner peripheral side of the second annular member 30 remaining. A projection 34 is provided in a part of the circumferential direction of the recess 33. In the present embodiment, the recess 33 is provided with a gap (space) 35 penetrating in the axial direction on one side in the circumferential direction, and a protrusion 34 serving as a barrier in the axial direction on the other side in the circumferential direction.

Fig. 5 a and 5B are enlarged cross-sectional views of a part of the holder 14 (the second column 22B and its periphery) as viewed in the circumferential direction, fig. 5 a showing a state before the claw 31 is engaged with the projection 34 (non-engaged state), and fig. 5B showing a state in which the claw 31 is engaged with the projection 34.

The projection 34 has a rectangular or cubic shape, and has a first surface 36 facing one axial side, a second surface 37 facing the radial outer side, and a third surface 38 facing the other axial side.

On the other hand, the pawl 31 has an axial projection 42 projecting from the axial end surface 41 of the second column 22b toward one axial side and a radial projection 43 projecting from the axial front portion of the axial projection 42 toward the radially inner side. Thus, in a state where the claw 31 is engaged with the projection 34 (see fig. 5B), the claw 31 has a configuration having a fourth surface 39 facing the first surface 36 and a fifth surface 40 facing the second surface 37. The axial end surface 41 of the second column 22b faces the third surface 38. The fourth surface 39 is the other surface in the axial direction of the radial protrusion 43, and the fifth surface 40 is the radially inner surface of the axial protrusion 42.

As shown in fig. 5(B), in a state where the pawl 31 is engaged with the projection 34, the first surface 36 and the fourth surface 39 can be in surface contact, the second surface 37 and the fifth surface 40 can be in surface contact, and the end surface 41 on one axial side of the second column 22B and the third surface 38 can be in surface contact. By interposing the projection 34 between the fourth surface 39 and the end surface 41 of the second column 22b, the second column 22b and the second annular member 30 are coupled so as not to be separated in the axial direction, and the fifth surface 40 and the second surface 37 are brought into contact with each other, whereby the column 22b and the second annular member 30 are positioned in the radial direction.

As shown in fig. 2 and 3, the third column 22C does not have the claws 31 of the second column 22b provided on one axial side, and the through-holes 27 for the rivets 22 are not formed as in the first column 22a, and the end surface 44 on one axial side of the third column 22C is a smooth surface along a plane orthogonal to the central axis C1 (see fig. 3) of the annular retainer 14. A surface 45 (see fig. 2) of the other axial side surface of the second ring member 30, which surface is opposed to the end surface 44 of the third column 22C, is also a smooth surface along a plane orthogonal to the central axis C1. In a state where the holder main body 20 and the second annular body 30 are coupled to each other by the engagement of the rivet 23 and the claw 31 with the projection 34, the end surface 44 on one axial side of the third column 22c is in contact with the surface 45 on the other axial side of the second annular body 30, and the third column 22c and the second annular body 30 are not coupled to each other. The third column 22c is in a cantilever shape extending from the first annular body 21 to one axial side. Further, the third column 22c and the first ring body 21 have high rigidity, and even if, for example, the cylindrical roller 13 comes into contact with the third column 22c, it is possible to resist a force generated by the contact.

In a state where the retainer body 20 and the second ring body 30 are coupled by the engagement of the rivets 23 and the claws 31 with the projections 34, the space 29 between the first ring body 21 and the second ring body 30 and between the circumferentially

adjacent columns

22, 22 becomes a pocket for holding the cylindrical rollers 13 (see fig. 1) as rolling elements.

As described above, in the cage 14, the number (total number) of rivets 23 for connecting the cage main body 20 and the second annular body 30 is smaller than the number (total number) of posts 22, and in the present embodiment, 15 posts 22 are provided, whereas 3 rivets 23 are provided. The 15 columns 22 include a first column 22a formed with a first through hole 27 through which the shaft portion 24 of the rivet 23 is inserted, and a second column 22b having a claw 31 at one axial end. In the present embodiment, the total number of 15 columns 22 includes the third column 22c that is not connected to the second annular member 30, although the end surface 44 on one axial side can contact the surface 45 on the other axial side of the second annular member 30.

In this way, the 15 columns 22 included in the retainer 14 include the first column 22a that is connected to the second annular member 30 by the penetration of the rivet 23 and the second column 22b that is connected to the second annular member 30 by the engagement of the claws 31 and the projections 34. That is, in order to connect the holder body 20 and the second annular body 30, it is not necessary to insert the rivet 23 into all the 15 columns 22, and it is sufficient to insert the rivet 23 into the first column 22a which is a part of the 15 columns 22 and engage the claw 31 with the projection 34 in the other second column 22 b.

Accordingly, it is not necessary to form the through

holes

27, 28 through which the rivet 23 is inserted in all of the 15 columns 22 and the portions of the first annular body 21 and the second annular body 30 corresponding to all of the columns 22, and the through

holes

27, 28 may be formed only in the 3 first columns 22a and the portions of the first annular body 21 and the second annular body 30 provided adjacent to the 3 first columns 22a in the axial direction. Only 3 portions corresponding to the 3 first posts 22a are used for the rivets 23. This can reduce the labor and time required for the hole-forming and caulking work for connecting the holder body 20 and the second annular body 30 by the rivet 23, and can reduce the number of manufacturing and assembling steps of the holder 14. As a result, it is possible to contribute to cost reduction of the cage 14 and cost reduction of the rolling bearing 10 including the cage 14.

In particular, in the present embodiment (see fig. 2 and 3), the end surface 44 on one axial side of the third column 22c can contact the surface 45 on the other axial side of the second annular member 30, but is not connected to the second annular member 30. As described above, among the 15 columns 22, the third column 22c is included in addition to the first column 22a and the second column 22b, and the number of portions for connecting the holder body 20 and the second annular body 30 by the rivets 23 is reduced. That is, as compared with the case where some (6) of the 15 columns 22 are the second columns 22b connected to the second annular body 30 by the claws 31 and the protrusions 34, and the remaining total number (9) is the first columns 22a using the rivets 23, the number of the first columns 22a using the rivets 23 can be reduced by further including (3) third columns 22c as in the present embodiment. This can further reduce the number of manufacturing and assembling steps of the retainer 14.

Here, the assembly of the cage 14 and the cylindrical rollers 13 will be described.

First, in the cage main body 20, the cylindrical rollers 13 are disposed between the circumferentially

adjacent columns

22, 22. In the present embodiment, as shown in fig. 3, the side surface 47 of each column 22 facing the circumferential direction is in the shape of an arc having a radius slightly larger than that of the cylindrical roller 13, and the cylindrical roller 13 provided between the

columns

22, 22 is in a state of being unable to come off in the radial direction.

In the state where the cage main body 20 and the cylindrical rollers 13 are combined in this way, the second annular body 30 is positioned on one axial side of the cage main body 20. At this time, as shown in fig. 6, the claws 31 of the second column 22b are inserted into the gaps 35 provided adjacent to one side in the circumferential direction of the protrusions 34 in the recess 33 of the second ring-shaped member 30. Fig. 6 is a view of a part of the holder 14 as viewed from the axial side. When the second ring member 30 is rotated relative to the holder body 20 (second column portion 22b) toward one side in the circumferential direction (in the direction of arrow R in fig. 6), the claws 31 can be engaged with the projections 34.

In this state (see fig. 2), the first through-hole 27 formed on the holder body 20 side and the second through-hole 28 formed on the second annular body 30 side are in the same phase (at the same position in the circumferential direction), and the rivet 23 is inserted through the through-

holes

27, 28, and the end of the rivet 23 is caulked, thereby preventing the rivet 23 from coming off. Accordingly, the holder body 20 and the second annular body 30 cannot rotate relative to each other, and the engagement between the claws 31 and the projections 34 is not released.

As described above, in the present embodiment, the recesses 33 are provided with the gaps 35 into which the claws 31 can be inserted in the axial direction at positions adjacent to one side in the circumferential direction of the protrusions 34, so that the assembly of the holder 14 by the engagement of the claws 31 with the protrusions 34 is facilitated, and when the assembly is completed, the holder body 20 and the second annular body 30 are mechanically coupled by the engagement of the claws 31 with the protrusions 34, and the rigidity of the holder 14 is improved.

In the above-described embodiment (see fig. 4), the concave portion 33 formed in the second ring member 30 is opened radially outward, but may be opened radially inward. In this case, fig. 2 may be considered as a view of the holder 14 viewed from the radially inner side, and even in this case, the same function as that of the above-described embodiment can be provided.

Fig. 7 is a view showing a modification of the claws 31 of the second column 22b and the protrusions 34 of the recesses 33 of the second annular member 30, and is a view of a part of the retainer 14 as viewed from the radially outer side. In the embodiment shown in fig. 7, the projection 34 is provided at a part of the recess 33 in the circumferential direction. In the recess 33, a gap 35 penetrating in the axial direction is provided on one circumferential side, and a protrusion 34 serving as a barrier in the axial direction is provided on the other circumferential side. The projection 34 has a rectangular or cubic shape, and has a first surface 36 facing one axial side, a second surface 37 facing one circumferential side, and a third surface 38 facing the other axial side. On the other hand, the pawl 31 has an axial projection 42 projecting further to one axial side from the axial end surface 41 of the second column 22b, and a circumferential projection 46 projecting from the axial front portion of the axial projection 42 to the other circumferential side. Thus, the claw 31 has a configuration having a fourth surface 39 facing the first surface 36 and a fifth surface 40 facing the second surface 37. The axial end surface 41 of the second column 22b faces the third surface 38.

In a state where the pawl 31 is engaged with the projection 34, the first surface 36 can be in surface contact with the fourth surface 39, the second surface 37 can be in surface contact with the fifth surface 40, and the end surface 41 on one axial side of the second column 22b can be in surface contact with the third surface 38. The second column 22b and the second ring member 30 are connected so as not to be separated in the axial direction by interposing the projection 34 between the fourth surface 39 and the end surface 41 of the second column 22 b. Further, since the recesses 33 are provided with the gaps 35 into which the claws 31 can be inserted in the axial direction at positions adjacent to one side in the circumferential direction of the protrusions 34, the assembly is facilitated as in the case of the embodiment shown in fig. 5(a) and 5(B) and fig. 6, and the engagement between the claws 31 and the protrusions 34 is not released when the holder body 20 and the second annular body 30 are coupled by the rivets 23.

The embodiments disclosed as described above are illustrative in all points and not restrictive. That is, the cage and the rolling bearing of the present invention are not limited to the illustrated embodiments, and may have other configurations within the scope of the present invention. For example, the claw 31 and the protrusion 34 may be in a manner other than the illustrated manner (the protrusion 34 is a rectangular parallelepiped or a cube).

Although the cage 14 of the above embodiment has been described as having the third column 22c in addition to the first column 22a and the second column 22b, the third column 22c may be omitted. That is, a part of the plurality of columns 22 may be the first column 22a, and the rest may be the second column 22 b.

In the embodiment shown in fig. 1, the cylindrical rollers 13 as rolling elements are arranged in two rows in the axial direction, but may be arranged in one row. Also, the inner race 11 or the outer race 12 may be in other ways. The retainer 14 may be configured to hold tapered rollers, needle rollers, or the like, in addition to the cylindrical rollers 13, or may be a retainer for a self-aligning roller bearing.

The rolling bearing provided with the cage of the present invention may be a bearing other than the one for thrust of the work rolls in a steel rolling mill.

The present application is based on japanese patent application filed on 8/3 in 2017 (japanese patent application No. 2017-150922), the contents of which are incorporated herein by reference.

Description of the reference symbols

10: rolling bearing 11: inner ring 12: outer ring

13: cylindrical roller (rolling element) 14: cage 20: cage body

21: first ring body 22: column 22 a: first column

22 b: second column 22 c: third column 23: rivet (shaft component)

27: first through hole 28: second through hole 29: space(s)

30: second ring-shaped body 31: the claw 32: part connected with the second column

33: recess 34: projection 35: gap

36: first surface 37: second surface 38: third side

39: fourth surface 40: fifth surface 41: end face

45: noodle

Claims

1. A retainer is provided with:

a holder body having a first annular body and a plurality of columns extending from the first annular body to one axial side;

a second annular body provided on one axial side of the plurality of columns; and

a shaft member, the number of which is smaller than the number of the columns, for connecting the cage body and the second annular body so as to penetrate the cage body and the second annular body in an axial direction,

a pocket for holding the rolling element is formed in a space between the first ring body and the second ring body and between the circumferentially adjacent columns,

the plurality of columns include a first column formed with a first through hole through which the shaft member is inserted, and a second column having a pawl at an end portion on one side in the axial direction,

a second through hole through which the shaft member is inserted is formed in a portion of the second annular body that is coupled to the first column,

the second ring-shaped body has a recess for receiving the pawl at a portion coupled to the second column, and a projection for engaging with the pawl is provided at a portion of the recess,

A gap into which the claw can be inserted in the axial direction is provided in the recess at a position adjacent to one side of the projection in the circumferential direction,

a wall surface of the second annular body is present in the recess at a position adjacent to the other side in the circumferential direction of the projection,

the claw has a sixth surface on one side in the circumferential direction and a seventh surface on the other side in the circumferential direction,

the seventh surface abuts against the wall surface, and the sixth surface is exposed to the gap,

the shaft member is inserted through the first through hole and the second through hole,

the recess is open to the radially outer or inner side and the other side in the axial direction,

the protrusion has a first surface facing one axial side, a second surface facing the radial direction, and a third surface facing the other axial side,

the claw has a fourth face opposite the first face and a fifth face opposite the second face,

an end surface of the second column on one side in the axial direction is opposed to the third surface, and the pawl protrudes from the end surface.

2. The holder of claim 1,

the plurality of columns further include a third column having an end surface on one axial side contactable with a surface on the other axial side of the second annular body and in a non-coupled state with the second annular body.

3. A rolling bearing is provided with: an inner ring; an outer ring; a plurality of rolling bodies disposed between the inner ring and the outer ring; and an annular retainer for retaining the plurality of rolling elements,

the holder is the holder of claim 1 or 2.