TW201910655A - Rolling bearing and retainer - Google Patents

Abstract

This retainer is provided with: a retainer body having a first annular body and a plurality of columns; a second annular body; and shaft members for connecting the retainer body and the second annular body. The plurality of columns include: first columns having formed therein through-holes in which the shaft members are inserted; and second columns each having a latch at one axial end thereof. The second annular body has recesses at the portions thereof which are connected to the second columns, the recesses accommodating the latches, and some of the recesses have protrusions engaging with the latches.

Description

Rolling bearings and retainers

The aspect of the present invention relates to a rolling bearing and a cage that holds the rolling element of the rolling bearing.

Rolling bearings are widely used in various fields to support shafts, and generally include: an inner ring, an outer ring, a plurality of rolling elements disposed between the inner ring and the outer ring, and an annular retainer that holds the rolling elements .

The retainer provided for the rolling bearing as described above is made of, for example, brass, and as shown in FIG. 8, it is assembled by rivets 91 (for example, refer to Patent Document 1). Fig. 8 is a perspective view showing a part of the retainer 99 as described above. The retainer 99 includes a retainer body 96, a first annular body 98 having an annular shape, a plurality of columns 97 extending axially from the first annular body 98, and a second annular shape having an annular shape The body 95 is provided on one side in the axial direction of the plural columns 97. The space 94 between the columns 97 and 97 adjacent to each other in the circumferential direction between the first ring-shaped body 98 and the second ring-shaped body 95 forms a pocket for holding a rolling element (not shown).

In the retainer main body 96, a portion 98a connecting the pillars 97 among all the pillars 97 and the first annular body 98 is formed with a long first hole 93 in the axial direction through which the shaft portion 91b of the rivet 91 is inserted. In addition, in the second ring-shaped body 95, a second hole 92 that penetrates axially at the same axial pitch as the post 97 is formed. The shaft portion 91b of the rivet 91 is inserted through the first hole 93 and the second hole 92, and the rivet end portion 91a is riveted so that the holder body 96 and the second ring-shaped body 95 are integrated. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Unexamined Patent Publication No. 2001-323934

[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 ring-shaped body 95 are slightly larger than the diameter of the shaft portion 91b . In order to form the first hole 93 in the holder body 96, it is necessary to penetrate the tool axially through the post 97 and the first ring-shaped body 98, but since the formed first hole 93 is an axially long hole with a small diameter, the Difficult to process, there will be occasions where the tool is thin and broken. In addition, it is necessary to perform the hole processing as described above on all the posts 97, and there is a problem that the manufacturing of the retainer 99 is difficult. In addition, even if the hole processing as described above is completed, it is necessary to perform riveting operations on the rivets 91 having the same number as the columns 97 one by one using a hammer or the like, and there is a problem that assembly takes time.

The retainer 99 (depending on the model) has, for example, about 12 to 20 posts 97. The more posts 97, the more work required for manufacturing (hole processing) and assembly operations. To this end, the aspect of the present invention is to provide a retainer which can reduce the man-hours for the hole processing and connecting operation for connecting the main body of the retainer and the second ring body, and can reduce the number of manufacturing and assembly operations. The purpose of the cage's rolling bearings. [Means for solving problems]

In the same aspect of the present invention, it includes: a retainer body having a first ring-shaped body and a plurality of columns extending from the first ring-shaped body toward one side in the axial direction; a second ring-shaped body provided on a plurality of the above-mentioned columns One side in the axial direction; and the number of shaft members, which is smaller than the number of the columns, for axially penetrating and connecting the retainer body and the second ring-shaped body, located between the first ring-shaped body and the second ring-shaped body The space between the pillars adjacent to each other in the circumferential direction forms a pocket for holding rolling elements. The plural pillars include: a first pillar formed with a through-hole through which the shaft member is inserted, and a second pillar An end portion on one side has a claw, and the second ring-shaped body has a concave portion for accommodating the claw at a portion connected to the second post, and the recess portion is provided with a protrusion that engages with the claw.

According to the retainer, the plural columns include: the first column through which the shaft member penetrates and is connected to the second ring-shaped body, and the second column connected to the second ring-shaped body by the engagement of the claw and the protrusion . That is, since the retainer body and the second ring-shaped body are connected, there is no need to insert the shaft member for all the pillars, as long as the first pillar of a plurality of pillars is inserted through the shaft member, the other The second column only needs to engage the claw and the protrusion. Therefore, there is no need to form through holes for inserting the shaft member in all the columns and the first ring body and the second ring body corresponding to these columns. Therefore, the number of man-hours for the hole processing for connecting the holder body to the second ring body by the shaft member or the connecting operation by the shaft member can be reduced, and the number of manufacturing and assembly operations of the holder can be reduced. In addition, as an example of the above-mentioned "connection operation by shaft member", for example, when the shaft member is a rivet, a rivet operation is performed.

Further, the plurality of columns further includes a third column including an end surface on one side in the axial direction that can contact a surface on the other side in the axial direction of the second ring-shaped body, and is in a non-connected state with the second ring-shaped body as good. According to this configuration, the plural columns include the first column and the second column, and include the third column, which further reduces the use of the shaft member to connect the holder body and the second ring-shaped body. Number of manufacturing and assembly work.

In addition, it is preferable that the concave portion is located on one side in the circumferential direction of the protrusion, and includes an interval in which the claw can be axially inserted. According to this configuration, when the holder body and the second ring-shaped body are combined, the second post of the holder body is inserted from the axial direction with respect to the above-mentioned interval provided in the concave portion of the second ring-shaped body, and then the second When the ring-shaped body rotates toward one side of the surrounding body relative to the holder body, a configuration is obtained in which the claw can be engaged with the protrusion. In addition, in a state where the claw and the protrusion are engaged, it is sufficient to connect the holder body and the second ring-shaped body with the shaft member penetrating the first column, so that the holder body and the second ring-shaped body cannot rotate in the circumferential direction. Therefore, the engagement between the claw and the protrusion cannot be released. Therefore, according to the above configuration, it is easy to assemble the retainer by the engagement of the claw and the protrusion, and when the assembly is completed, as long as the retainer body and the second ring-shaped member are coupled by the engagement mechanism of the claw and the protrusion, Can improve the rigidity of retention.

In addition, the concave portion is open toward the radially outer side or the inner side, and the other side toward the axial direction, and the protrusion has: a first surface toward one side in the axial direction; a second surface toward the radial direction; and another toward the axial direction The third surface on one side, the claw has a fourth surface opposed to the first surface, and a fifth surface opposed to the second surface, the axial end surface of the second column is The third face is opposed, and it is preferable that the claws protrude from the end face. According to this configuration, the surfaces with the claws are opposed to the surfaces with the protrusions, and the engagement between the protrusions and the claws makes the holder body and the second ring-shaped body inseparable in the axial direction.

According to another aspect of the present invention, a rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements provided between the inner ring and the outer ring, and a ring-shaped cage that holds the plurality of rolling elements, and the cage includes The above-mentioned constitutions. According to this rolling bearing, in the manufacturing and assembly of the cage, the number of man-hours for the hole processing for connecting the cage body to the second ring body by the shaft member or the coupling operation by the shaft member can be reduced, and the number of man-hours can be reduced. [Effect of invention]

According to the aspect of the present invention, in manufacturing and assembling of the retainer, the number of man-hours for connecting the holder body with the second ring body by the shaft member or the connecting operation by the shaft member can be reduced, and the number of man-hours can be reduced . As a result, it contributes to the cost reduction of the cage (the cost reduction of the rolling bearing).

Figure 1 is a cross-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 retainer 14 that holds the plurality of rolling elements. The rolling element of this embodiment is a cylindrical roller 13 and the rolling bearing 10 is a cylindrical roller bearing.

The inner ring 11 of the present embodiment includes a cylindrical inner ring body 15 and an annular flange ring 16 in a state where the flange ring 16 is arranged on one side in the axial direction of the inner ring body 15, and these components are combined Circle 11. On the outer peripheral side of the inner ring body 15, an inner ring track surface 17 is formed in rolling contact with the cylindrical roller 13, and on the other axial side of the inner ring body 15, an inner flange portion 18 protruding radially outward is provided. The outer ring 12 of this embodiment has a cylindrical shape, and an outer ring track surface 19 in which the cylindrical rollers 13 are in rolling contact is formed on the inner peripheral side. On one side and the other side of the outer ring 12 in the axial direction, outer flange portions 19a and 19b protruding radially inward are provided. In this embodiment, two rows of cylindrical rollers 13 are arranged side by side in the axial direction. The two rows of cylindrical rollers 13 are held by a holder 14. The inner ring 11, the outer ring 12, and the cylindrical roller 13 are made of, for example, bearing steel. The rolling bearing 10 shown in FIG. 1 is used as a bearing for the thrust of a pressure roller of a rolling mill.

FIG. 2 is a diagram of a state in which the ring-shaped retainer 14 is unfolded in a plan view when viewed from the outside in the radial direction. As shown in FIGS. 1 and 2, the holder 14 has a two-division structure. That is, the retainer 14 includes a retainer body 20 having a first annular body (first annular portion) 21 and a plurality of columns (pillars) extending from the first annular body 21 toward one side in the axial direction (Part) 22, the second annular body 30 is provided on one side in the axial direction of the plural columns 22. The first ring-shaped body 21 has a circular ring shape, and from this axial side of the first ring-shaped body 21, a column 22 is linearly extended toward one side of the axial direction. The second annular body 30 is an annular member. The cage body 20 and the second ring-shaped body 30 of the present embodiment are made of copper alloy (brass), but they may be other metal materials. The holder body 20 and the second ring-shaped body 30 are composed of other members, although it will be described later by the rivet 23 (see FIG. 2) and the engagement of the claw 31 and the protrusion 34 to be integrated.

In FIG. 2, the retainer 14 includes the rivet 23 as a shaft member for axially connecting the retainer body 20 and the second ring-shaped body 30. The rivet 23 has a linear shaft portion 24 and a head portion 25 provided on the axial side of the shaft portion 24 with an enlarged diameter. The shaft portion 24 is inserted through the through-hole 28 provided in the second annular body 30 and the through-hole 27 provided in the holder body 20, and the other end in the axial direction is riveted (elastically deformed) to form an enlarged diameter The caulking portion 26 of the buckle prevents the holder body 20 and the second ring-shaped body 30 from being separated. In addition, although not shown, an elongated bolt may be used as another shaft member instead of the rivet 23, and the bolt may be inserted through the through holes 27, 28. The nut on the other side screwed to the bolt serves as a configuration for connecting the holder body 20 and the second ring-shaped body 30.

The first through hole 27 of the holder body 20 penetrates the first annular body 21 and the post 22 in the axial direction. This will be described later, but in this embodiment, the first through holes 27 are provided at the same number of three places as the rivets 23 (see FIG. 3). The second through hole 28 penetrates the second annular body 30 in the axial direction. In the second ring-shaped body 30, the second through holes 28 are the same as the first through holes 27 and provided in the same position in the same direction as the first through holes 27. These through holes 27 and 28 are slightly larger in diameter than the diameter of the shaft portion 24 of the rivet 23. The column 22 through which the shaft portion 24 of the rivet 23 passes is referred to as a first column 22a. As shown in FIG. 2, the holder 14 has a second post 22 b and a third post 22 c in addition to the first post 22 a. The configuration of the second pillar 22b and the third pillar 22c will be described later.

FIG. 3 is a view of the holder body 20 viewed from one side in the axial direction. The holder body 20 of the present embodiment has fifteen posts 22, and the first post 22a in which the through hole 27 is formed is three. The first pillars 22a are arranged uniformly along the peripheral direction (120 degrees apart in this embodiment). In addition, six of the 15 columns 22 are the second columns 22b, and the other six columns are the third columns 22c. A second column 22b and a third column 22c are provided between a first column 22a and other first columns 22a. In this embodiment, two second columns 22b and two third columns 22c are provided between one first column 22a and the other first columns 22a. In addition, the number of the columns 22 differs according to the model (size) of the rolling bearing 10, and the respective numbers of the first columns 22a, the second columns 22b, and the third columns 22c and the arrangement in the peripheral direction may also be as shown in FIG. Beyond the indicated form. However, the first pillar 22a and the second pillar 22b can be dispersed in the surrounding direction (equally arranged), as shown in FIG. 3, or a plurality of (two) second pillars 22b can be used as a group. The groups are scattered in the surrounding direction (it can also be arranged equally).

As shown in FIG. 2 and FIG. 3, the second post 22b has a claw 31 at the end on one side in the axial direction. FIG. 4 is a perspective view showing a part of the second column 22b and the second ring-shaped body 30. FIG. In a portion 32 of the second ring-shaped body 30 connected to the second post 22b, a recess 33 for accommodating the claw 31 is formed, and a protrusion 34 that engages with the claw 31 is provided in a part of the recess 33. The recess 33 (and the protrusion 34) is the same number as the second post 22b and is provided at the same position as the second post 22b in the peripheral direction. The claw 31 of the second post 22b of the holder body 20 is engaged with the protrusion 34 formed in the recess 33 of the second ring-shaped body 30, thereby connecting the holder body 20 and the second ring-shaped body 30 at the shaft Can not be separated.

As shown in FIG. 4, in the second ring-shaped body 30, the concave portion 33 is opened at least toward the radially outer side and the other side in the axial direction, and in this embodiment, it is further opened toward the one side in the axial direction. In other words, the recess 33 allows the second ring-shaped body 30 to pass through axially while remaining on its inner peripheral side. A protrusion 34 is provided in a portion of the recess 33 in the circumferential direction. Furthermore, in the present embodiment, the recess 33 is provided with a space (space portion) 35 penetrating axially on one side in the peripheral direction, and a protrusion 34 serving as an axial partition wall is provided on the other side in the peripheral direction.

FIGS. 5 (A) and 5 (B) are cross-sectional views of a part of the retainer 14 (the second post 22b and its surroundings) viewed in the surrounding direction, and FIG. 5 (A) is a diagram showing the claw 31 and The state before the protrusion 34 is engaged (non-engaged state), and FIG. 5 (B) shows the state after the claw 31 is engaged with the protrusion 34. The protrusion 34 has a rectangular parallelepiped or cubic shape, and has a first surface 36 facing one side in the axial direction; a second surface 37 facing outward in the radial direction; and a third surface 38 facing the other side in the axial direction. On the other hand, the claw 31 has an axial protrusion 42 protruding from the axial end face 41 of the second post 22b toward the radial one side, and a front portion of the axial protrusion 42 from the axial side The radial protrusion 43 protruding toward the radially inner side. With this, in a state where the claw 31 is engaged with the protrusion 34 (see FIG. 5 (B)), the claw 31 becomes a fifth surface 39 opposite to the first surface 36 and a fifth surface opposite the second surface 37 40 composition. In addition, the end surface 41 on the one side in the axial direction of the second pillar 22 b is opposed to the third surface 38. The fourth surface 39 is the surface on the other side in the axial direction of the radial protrusion 43, and the fifth surface 40 is the surface on the radially inner side of the axial protrusion 42.

As shown in FIG. 5 (B), in a state where the claw 31 is engaged with the protrusion 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 second The end surface 41 on one side in the axial direction of the column 22b is in surface contact with the third surface 38. A protrusion 34 is interposed between the fourth surface 39 and the end surface 41 of the second post 22b, so that the second post 22b and the second ring-shaped body 30 are axially inseparably connected, so that the fifth surface 40 and the second surface 37 With the contact, the radial positioning of the column 22b and the second annular body 30 is performed.

As shown in FIGS. 2 and 3, the third column 22c is not provided with the claw 31 of the second column 22b on the axial side, and if the first column 22a is not formed with the through hole 27 for the rivet 22, The end surface 44 on the one axial side of the three-column 22c forms a smooth surface along a plane that runs straight toward the central axis C1 (see FIG. 3) of the ring-shaped holder 14. In addition, among the side surfaces on the other side in the axial direction of the second ring-shaped body 30, the surface 45 (refer to FIG. 2) opposed to the above-mentioned end surface 44 of the third column 22c is also formed to go straight along the central axis C1 Smooth surface of the plane. In a state where the holder body 20 and the second ring-shaped body 30 are engaged with the protrusion 34 by the rivet 23 and the claw 31, the end surface 44 on the one side in the axial direction of the third column 22c and the second ring-shaped body The above-mentioned surface 45 on the other side in the axial direction of 30 is in a contact state, and the third post 22c and the second ring-shaped body 30 are not connected. The third column 22c is formed in a single cantilever shape extending from the first annular body 21 toward one side in the axial direction. In addition, the third column 22c and the first ring-shaped body 21 have high rigidity. For example, even if the cylindrical roller 13 contacts the third column 22c, it can still resist the resistance generated by the contact.

In a state where the holder body 20 and the second ring-shaped body 30 are connected by the engagement of the rivet 23 and the claw 31 and the protrusion 34, the first ring-shaped body 21 and the second ring-shaped body 30 are adjacent to each other in the circumferential direction The space 29 between the columns 22 and 22 becomes a pocket holding the cylindrical roller 13 (see FIG. 1) of the rolling element.

As described above, in the retainer 14, the number (total number) of rivets 23 for connecting the retainer body 20 and the second ring-shaped body 30 is smaller than the number (total number) of the pillars 22. There are 15 rivets and 23 for three. In addition, the 15 columns 22 include a first column 22a in which a first through hole 27 through which the shaft portion 24 of the rivet 23 is inserted is formed, and a second column having a claw 31 at one end in the axial direction柱 22b. In addition, in the present embodiment, in the total number of 15 columns 22, although the end surface 44 on one side in the axial direction can contact the surface 45 on the other side in the axial direction of the second annular body 30, it includes The body 30 is the third post 22c in the unconnected state.

As described above, the 15 posts 22 included in the retainer 14 include: the first post 22a connected to the second ring-shaped body 30 by the rivet 23, and the second ring by engaging the claw 31 with the protrusion 34 The second post 22b connected by the shape 30. That is, since the holder body 20 and the second ring-shaped body 30 are connected, there is no need to insert the rivet 23 through all the 15 posts 22, only the first post 22a which is a part of the 15 posts 22 The rivet 23 is inserted through it, and the claw 31 and the protrusion 34 may be engaged with the other second post 22b.

Therefore, in each of the 15 columns 22 and the first ring body 21 and the second ring body 30 respectively corresponding to these columns 22, no through holes 27, 28 through which the rivets 23 are inserted are formed. Necessary, as long as the three first posts 22a and the first ring-shaped body 21 and the second ring-shaped body 30, only the axially adjacent portions of the three first posts 22a are formed with through holes 27, 28 is enough. In addition, the use of the rivet 23 corresponds to only three places of the three first posts 22a. Accordingly, the number of man-hours for the hole processing or riveting operation for connecting the holder body 20 and the second ring body 30 with the rivet 23 is reduced, and the number of manufacturing and assembly operations of the holder 14 can be reduced. As a result, it contributes to the cost reduction of the cage 14 and further to the cost reduction of the rolling bearing 10 provided with the cage 14.

In particular, in this embodiment (see FIGS. 2 and 3), in the third column 22c, the end surface 44 on one side in the axial direction can be in contact with the surface 45 on the other side in the axial direction of the second annular body 30. However, it is not connected to the second ring-shaped body 30. As described above, among the 15 columns 22, in addition to the first column 22a and the second column 22b, and including the third column 22c, the rivet 23 is used to reduce the joint between the holder body 20 and the second ring-shaped body 30 . That is to say, among the 15 pillars 22, a part (6 pillars) is the second pillar 22b connected to the second ring-shaped body 30 by the claws 31 and the protrusions 34, and the rest (9 pillars) are more used. In the case of the first post 22a of the rivet 23, as in this embodiment, the (three) third posts 22c are further included, and the number of first posts 22a using the rivet 23 can be reduced. As a result, the number of manufacturing and assembly operations of the retainer 14 can be further reduced.

Here, the assembly of the cage 14 and the cylindrical roller 13 will be described. First, in the cage body 20, the cylindrical roller 13 is arranged between the columns 22 and 22 adjacent in the circumferential direction. In this embodiment, as shown in FIG. 3, the side surface 47 in the circumferential direction of each column 22 has a circular arc shape slightly larger than the radius of the cylindrical roller 13, and the cylindrical roller 13 provided between the columns 22 and 22 It is in a state where it cannot be detached in the radial direction.

As described above, in the state where the cage body 20 and the cylindrical roller 13 are combined, the second ring-shaped body 30 is positioned on one side in the axial direction of the cage body 20. At this time, as shown in FIG. 6, the claw 31 of the second post 22 b is inserted into the recess 33 of the second ring-shaped body 30 and provided in the aforementioned space 35 adjacent to one side of the protrusion 34 in the circumferential direction. FIG. 6 is a view of a part of the retainer 14 viewed from one side in the axial direction. In addition, when the second ring-shaped body 30 is rotated relatively to one side in the peripheral direction (arrow R direction in FIG. 6) relative to the holder body 20 (second column portion 22 b), the claw 31 can be engaged with the protrusion 34 Together.

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 ring body 30 side are in the same phase (the same position in the circumferential direction) The rivet 23 is inserted through the through holes 27 and 28, and the end of the rivet 23 is riveted to prevent the rivet 23 from falling off. As a result, the holder body 20 and the second ring-shaped body 30 cannot rotate relative to each other, so that the engagement between the claw 31 and the protrusion 34 cannot be released. As described above, in the present embodiment, the recess 33 is provided with a space 35 in which the claw 31 can be inserted axially on one side of the protrusion 34 in the circumferential direction, whereby the retainer can be easily engaged by the engagement of the claw 31 with the protrusion 34 14 is assembled, and when the assembly is completed, the retainer body 20 and the second ring-shaped body 30 are combined by the engagement mechanism of the claw 31 and the protrusion 34 to increase the rigidity of the retainer 14.

In the above embodiment (see FIG. 4), although the concave portion 33 formed in the second annular body 30 is opened radially outward, it may be opened radially inward. At this time, FIG. 2 is a diagram when the holder 14 is viewed from the radially inner side, and in this case, it may have the same function as the above-described embodiment.

FIG. 7 is a diagram showing a modification of the claw 31 of the second post 22b and the protrusion 34 of the recess 33 of the second ring-shaped body 30, and a view of a part of the retainer 14 viewed from the outside in the radial direction. In the form shown in FIG. 7, a protrusion 34 is also provided in a part in the peripheral direction of the recess 33. In addition, in the recessed portion 33, a gap 35 penetrating the axial direction is provided on one side in the circumferential direction, and a projection 34 serving as an axial screen wall is provided on the other side in the circumferential direction. The protrusion 34 has a rectangular parallelepiped shape or a cubic shape, and has a first surface 36 facing one side in the axial direction; a second surface 37 facing one side in the circumferential direction; and a third surface 38 facing the other side in the axial direction. On the other hand, the claw 31 has an axial protrusion 42 protruding further toward the axial side from the axial end face 41 of the second post 22b, and a front side of the axial protrusion 42 from the axial side The peripheral protrusion 46 that protrudes toward the other side in the peripheral direction. As a result, the claw 31 has a fourth surface 39 facing the first surface 36 and a fifth surface 40 facing the second surface 37. In addition, the end surface 41 on the one side in the axial direction of the second pillar 22 b is opposed to the third surface 38.

In a state where the claw 31 is engaged with the protrusion 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 of the second column 22 on one side in the axial direction 41 comes into surface contact with the third surface 38. A protrusion 34 is interposed between the fourth surface 39 and the end surface 41 of the second post 22b, so that the second post 22b and the second annular body 30 are connected in an axially inseparable manner. In addition, in the concave portion 33, a gap 35 into which the claw 31 can be inserted axially is provided on one side in the circumferential direction of the protrusion 34, and therefore, as shown in FIGS. 5 (A), 5 (B), and 6 In the case of the same configuration, assembly is easy, and when the holder body 20 and the second ring-shaped body 30 are connected by the rivet 23, the engagement of the claw 31 and the protrusion 34 is prevented from being released.

Although the embodiment disclosed above is exemplified in all points, it is not limited thereto. That is, the cage and the rolling bearing of the present invention are not limited to those shown in the drawings, and may be other forms within the scope of the present invention. For example, the claw 31 and the protrusion 34 may be other than the illustrated form (the protrusion 34 is a rectangular parallelepiped or a cube). The retainer 14 of the above embodiment has been described in addition to the first post 22a and the second post 22b and has the third post 22c, but the third post 22c may not be provided. That is, a part of the plural columns 22 may be the first column 22a, and the other may be the second column 22b. In the form shown in FIG. 1, although the cylindrical rollers 13 of the rolling elements are arranged in two rows in the axial direction, they may be in one row. In addition, the inner ring 11 and the outer ring 12 may have other forms. The retainer 14 may retain a tapered roller, a needle roller, or the like in addition to the cylindrical roller 13, and may also be a retainer for self-aligning roller bearings. Furthermore, the rolling bearing provided with the cage of the present invention may be other than the bearing for the thrust of the pressure roller of the rolling mill.

This application is based on the records of the Japanese Patent Application (Japanese Patent Application 2017-150922) filed on August 3, 2017, and its content is hereby incorporated by reference.

10‧‧‧ Rolling bearing (rolling element)

11‧‧‧Inner circle

12‧‧‧Outer ring

13‧‧‧Cylinder roller (rolling element)

14‧‧‧ retainer

20‧‧‧ retainer body

21‧‧‧The first ring

22‧‧‧pillar

22a‧‧‧The first column

22b‧‧‧Second Pillar

22c‧‧‧third column

23‧‧‧ Rivet (shaft member)

27‧‧‧First through hole

28‧‧‧Second through hole

29‧‧‧Space

30‧‧‧The second ring

31‧‧‧Claw

32‧‧‧Part connected to the second column

33‧‧‧recess

34‧‧‧protrusion

35‧‧‧Interval

36‧‧‧The first side

37‧‧‧Second side

38‧‧‧The third side

39‧‧‧Fourth

40‧‧‧ fifth

41‧‧‧End

45‧‧‧ noodles

Figure 1 is a cross-sectional view of a rolling bearing. Figure 2 is a plan view of the state where the ring-shaped retainer is unfolded from the outside in the radial direction. FIG. 3 is a view of the cage body viewed from one side in the axial direction. FIG. 4 is a perspective view showing a part of the second column and the second ring body. Figures 5 (A) and 5 (B) are cross-sectional views of a part of the retainer viewed along the surrounding direction, and Figure 5 (A) is a view showing the state before the claw and the protrusion are engaged (non-engaged state) ), Figure 5 (B) shows the state after the claw and the protrusion are engaged. FIG. 6 is a view of a part of the retainer viewed from one side in the axial direction. FIG. 7 is a diagram showing a modification of the claw of the second post and the protrusion of the concave portion of the second ring-shaped body. FIG. 8 is a perspective view showing a part of a conventional holding example.

Claims (5)

A retainer comprising: a retainer body having a first annular body and a plurality of columns extending from the first annular body toward one side in the axial direction; a second annular body provided on the axial side of the plurality of columns Side; and shaft members, less than the number of the column, for axially penetrating the retainer body and the second ring body and connected, located between the first ring body and the second ring body around The space between the columns adjacent to each other in the direction forms a pocket for holding the rolling element, the plural columns include: a first column, a through-hole through which the shaft member is inserted, and a second column on one side in the axial direction The end has a claw, and the second ring-shaped body has a recess for accommodating the claw at a portion connected to the second post, and a protrusion that engages with the claw is provided in a part of the recess. The retainer described in item 1 of the patent application range, wherein the plurality of columns further includes an end surface on one side in the axial direction that can contact a surface on the other side in the axial direction of the second annular body and is in contact with the second ring The shape becomes the third column in the unconnected state. A retainer as described in item 1 or 2 of the patent application range, wherein the concave portion includes a space in which the claw can be inserted axially beside one side of the protrusion in the circumferential direction. The retainer as described in the first or second patent application, wherein the concave portion is opened radially outward or inward, and the other side in the axial direction, and the protrusion has a first surface facing one side in the axial direction ; A second surface facing the radial direction; and a third surface facing the other side in the axial direction, the claw has a fourth surface opposite to the first surface, and a fifth surface opposite to the second surface, An end surface of one side of the second column in the axial direction is opposed to the third surface, and the claw protrudes from the end surface. A rolling bearing comprising: an inner ring, an outer ring, a plurality of rolling elements disposed between the inner ring and the outer ring, and a ring-shaped cage that holds the plurality of rolling elements, and the cage is the first item in the patent application ~ The retainer described in any one of items 4.