TWI726224B - Rolling bearings and retainers - Google Patents

Abstract

The retainer of the present invention includes a retainer body having a first ring-shaped body and a plurality of posts; a second ring-shaped body; and a shaft member for connecting the retainer body and the second ring-shaped body. The plural columns include a first column with a through hole formed to penetrate the shaft member, and a second column with a claw on one end in the axial direction. The second annular body has a recess for accommodating the claw at the part connected with the second column, and a protrusion for engaging with the claw is provided in a part of the recess.

Description

Rolling bearings and retainers

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

Rolling bearings are widely used in various fields to support shafts. Generally, they have: inner ring, outer ring, plural rolling elements arranged between the inner ring and outer ring, and ring-shaped cages that hold the rolling elements. .

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

In the holder main body 96, among all the posts 97 and the first ring-shaped body 98, the part 98a connecting the post 97 is formed with a long first hole 93 in the axial direction through which the shaft 91b of the rivet 91 is inserted. In addition, the second annular body 95 has second holes 92 penetrating axially at the same axial pitch as the columns 97 are 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 main body 96 and the second annular body 95 are integrated. [Prior Technical Document] [Patent Document]

[Patent Document 1] JP 2001-323934 A

[The problem to be solved by the invention]

The diameter of the shaft portion 91b of the rivet 91 is, for example, about 2 mm. The diameter of the first hole 93 formed in the retainer 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 91b. . In order to form the first hole 93 in the retainer body 96, it is necessary to insert a tool axially through the column 97 and the first annular body 98. However, the first hole 93 formed is an axially long hole with a small diameter. Difficulty in processing, there will be occasions where the tool is thin and broken. In addition, it is necessary to perform hole processing as described above for all the posts 97, and there is a problem that the manufacture of the retainer 99 is difficult. Furthermore, even if the above-mentioned hole processing is completed, it is necessary to use a hammer or the like to perform riveting operations on the rivets 91 of the same number as the column 97 one by one, and there is a problem that assembly takes man-hours.

The retainer 99 (depending on the model) includes, for example, about 12 to 20 posts 97. The larger the number of posts 97, the more labor required for manufacturing (hole processing) and assembly operations. For this reason, the aspect of the present invention is to provide a retainer that reduces the number of man-hours for processing and connecting the hole for connecting the retainer main body and the second annular body, and can reduce the number of manufacturing and assembling processes, and is provided with this retainer The purpose of the cage is the rolling bearing. [Means used to solve the problem]

In a similar aspect of the present invention, a retainer body is provided with a first annular body and a plurality of columns extending from the first annular body toward one side in the axial direction; and a second annular body is provided on the plurality of columns. One side in the axial direction; and a shaft member, which has a smaller number of posts than the above-mentioned posts, for axially penetrating the holder main body and the second ring-shaped body and connecting them, and is located between the first ring-shaped body and the second ring-shaped body The space between the pillars adjacent to each other in the peripheral direction forms a pocket for holding the rolling element. The plurality of pillars includes a first pillar with a through hole formed to penetrate the shaft member, and a second pillar on the shaft The end on one side has a claw, and the second ring-shaped body has a recess for accommodating the claw at a portion connected to the second column, and a protrusion that engages with the claw is provided in the recess.

According to this 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 which is connected to the second ring-shaped body by the engagement of the claws and the protrusions . That is, because the holder main body and the second annular body are connected, there is no need to insert the shaft member for all the columns. As long as the first column of a part of the plurality of columns is inserted through the shaft member, the other It is sufficient for the second column to engage the claw and the protrusion. Therefore, there is no need to form a through hole for inserting the shaft member in all the columns and the respective parts of the first ring body and the second ring body corresponding to all the columns. Therefore, the number of man-hours for the hole processing for connecting the holder main body and the second annular body by the shaft member or the connection work by the shaft member can be reduced, and the number of manufacturing and assembling steps of the holder can be reduced. In addition, as an example of the above-mentioned "connection operation by means of a shaft member", for example, when the shaft member is a rivet, the rivet operation is performed.

In addition, the plurality of columns further includes a third column whose end surface on one side in the axial direction can contact the surface on the other side in the axial direction of the second annular body and is in a non-connected state with the second annular body. good. According to this structure, in addition to the first column and the second column, and the third column in the plural columns, the use of shaft members to connect the holder main body and the second annular body is further reduced, and the holder’s capacity can be further reduced. Number of manufacturing and assembly work.

In addition, it is preferable that the said recessed part is the side of one side of the peripheral direction of the said protrusion, and it is good to include the space|interval which can insert the said claw axially. According to this configuration, when combining the holder main body and the second annular body, the second post of the holder main body is inserted from the axial direction with respect to the above-mentioned interval of the concave portion provided in the second annular body, and then the second When the ring-shaped body rotates to one side of the surrounding with respect to the holder main body, a structure capable of engaging the claws with the protrusions is obtained. In addition, in the state where the claw and the protrusion are engaged, it is only necessary to connect the holder main body and the second annular body by the shaft member penetrating the first column, so that the holder main body and the second annular body cannot rotate in the peripheral direction. The engagement between the claw and the protrusion cannot be released. Therefore, according to the above configuration, it is easy to assemble the holder by the engagement of the claws and the protrusions, and when the assembly is completed, the holder body and the second ring-shaped member only need to be coupled by the engagement mechanism of the claws and the protrusions. The rigidity of retention can be improved.

In addition, the recessed portion is opened toward the outside or inside in the radial direction 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 in the radial direction; and another side facing in the axial direction. The third surface on one side, the claw, has a fourth surface opposite to the first surface, and a fifth surface opposite to the second surface. The end surface on one side in the axial direction of the second column is connected to the The third surface is opposite, and it is preferable that the claws protrude from the end surface. According to this configuration, each surface having the claws is opposed to each surface having the protrusions, and the engagement between the protrusions and the claws makes the holder main body and the second annular 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 holding the plurality of rolling elements, the cage including The above-mentioned components.　　 According to this rolling bearing, in the manufacturing and assembling of the cage, the number of man-hours for the hole machining for connecting the cage main body and the second annular body by the shaft member or the connection operation by the shaft member can be reduced, thereby reducing the number of work. [Effects of the invention]

According to the aspect of the present invention, in the manufacturing and assembly of the cage, the number of man-hours for the hole processing for connecting the holder main body and the second annular body by the shaft member or the connection operation by the shaft member can be reduced, and the number of labors 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 the 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 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 this embodiment has a cylindrical inner ring main body 15 and an annular flange ring 16. The flange ring 16 is arranged on one side of the inner ring main body 15 in the axial direction, and these structures are combined. Circle 11. An inner ring raceway surface 17 with which cylindrical rollers 13 roll in contact is formed on the outer peripheral side of the inner ring main body 15, and an inner flange portion 18 protruding radially outward is provided on the other axial side of the inner ring main body 15. The outer ring 12 of this embodiment has a cylindrical shape, and an outer ring raceway surface 19 with which the cylindrical roller 13 is in rolling contact is formed on the inner peripheral side. On one side and the other side in the axial direction of the outer ring 12, outer flange portions 19a, 19b protruding inward in the radial direction 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 retainer 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 the pressure roll of a rolling mill.

Fig. 2 is a view of a state where the ring-shaped retainer 14 is unfolded in a plane, and is a view when viewed from the outside in the radial direction. As shown in Fig. 1 and Fig. 2, the retainer 14 has a two-part structure. That is, the retainer 14 includes a retainer main body 20 having a first ring-shaped body (first ring-shaped portion) 21 and a plurality of columns (pillars) extending from the first ring-shaped body 21 toward one side in the axial direction. Section) 22, the second annular body 30, is provided on one side in the axial direction of the plurality of columns 22. The first annular body 21 has an annular shape, and a column 22 is linearly extended from one side in the axial direction of the first annular body 21 to one side in the axial direction. The second annular body 30 is an annular member. Although the holder main body 20 and the second annular body 30 of this embodiment are made of copper alloy (brass), they may be made of other metal materials. The holder main body 20 and the second annular body 30 are composed of other members, although it will be described later that they are integrally connected by rivets 23 (see FIG. 2) and the engagement of the claws 31 and the protrusions 34.

In FIG. 2, the retainer 14 includes the rivet 23 described above as a shaft member for axially penetrating and connecting the retainer main body 20 and the second annular body 30. The rivet 23 has a linear shaft portion 24 and a head portion 25 with an enlarged diameter provided on one side of the shaft portion 24 in the axial direction. The shaft portion 24 is inserted into the through hole 28 provided in the second annular body 30 and the through hole 27 provided in the retainer body 20, and the end on the other side in the axial direction is riveted (elastically deformed) to form an enlarged diameter The riveted part 26 of the squeezing part 26, thereby, the holder main body 20 and the second annular body 30 cannot be separated. Also, although not shown, a slender bolt can be used as another shaft member instead of the rivet 23, and the bolt can be inserted through the through holes 27 and 28. The nut screwed on the other side of the bolt serves as a structure that connects the holder main body 20 and the second annular body 30.

The first through hole 27 of the holder main body 20 penetrates the first annular body 21 and the column 22 in the axial direction. It will be described later, but in this embodiment, the first through holes 27 are provided in 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 annular body 30, the second through holes 28 are the same number as the first through holes 27 and are provided at the same position in the same 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 column 22 through which the shaft portion 24 of the rivet 23 penetrates is referred to as a first column 22a. As shown in FIG. 2, the holder 14 has a second column 22b and a third column 22c in addition to the first column 22a. The configuration of the second column 22b and the third column 22c will be described later.

Fig. 3 is a view of the holder main body 20 viewed from one side in the axial direction. The holder main body 20 of this embodiment has 15 pillars 22, among them, the first pillar 22a in which the through-hole 27 is formed is three pillars. The first pillars 22a are evenly arranged along the peripheral direction (in this embodiment, they are separated by 120 degrees). In addition, six of the 15 pillars 22 are the second pillars 22b, and the other six pillars are the third pillars 22c. A second column 22b and a third column 22c are provided between one first column 22a and the 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 columns 22 differs according to the model (size) of the rolling bearing 10. In addition, the respective numbers of the first column 22a, the second column 22b, and the third column 22c and the arrangement in the peripheral direction may be as shown in Fig. 3 Other than the displayed form. However, the first pillars 22a and the second pillars 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 grouped together. The groups are dispersed in the surrounding direction (it can also be arranged equally).

As shown in FIGS. 2 and 3, the second column 22b has a claw 31 at an 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 body 30. As shown in FIG. In the portion 32 of the second ring body 30 that is connected to the second column 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 pillar 22b and is provided at the same position in the peripheral direction as the second pillar 22b. The claw 31 of the second post 22b of the holder main body 20 is engaged with the protrusion 34 formed in the recess 33 of the second annular body 30, thereby connecting the holder main body 20 and the second annular body 30. To form cannot be separated.

As shown in Fig. 4, in the second annular body 30, the recess 33 is opened toward at least the radially outer side and the other axial side, and the present embodiment is further opened toward one axial side. That is, the recess 33 allows the second annular body 30 to pass through in the axial direction while leaving the inner and peripheral sides thereof. A protrusion 34 is provided in a part of the circumferential direction of the recess 33. In addition, in the present embodiment, the recess 33 is provided with a space (space portion) 35 axially penetrating one side in the peripheral direction, and a protrusion 34 serving as a partition wall in the axial direction is provided on the other side in the peripheral direction.

Fig. 5(A) and Fig. 5(B) are cross-sectional views of a part of the holder 14 (the second column 22b and its surroundings) viewed along the peripheral direction, and Fig. 5(A) shows the claw 31 and The state before the protrusion 34 is engaged (non-engagement state), and FIG. 5(B) shows the state after the claw 31 and the protrusion 34 are engaged. The “protrusion 34” has a rectangular parallelepiped or cubic shape, and has a first surface 36 on one side in the axial direction; a second surface 37 on the outside in the radial direction; and a third surface 38 on the other side in the axial direction. On the other hand, the claw 31 has an axial protrusion 42 protruding to one side in the radial direction from the end surface 41 on one axial side of the second column 22b, and a front portion on one axial side from the axial protrusion 42 The radial protrusion 43 protrudes toward the radially inward side. Thereby, in the state where the claw 31 is engaged with the protrusion 34 (refer to FIG. 5(B)), the claw 31 has a fourth surface 39 opposed to the first surface 36 and a fifth surface opposed to the second surface 37 The composition of 40. In addition, the end surface 41 on one axial side of the second column 22b faces the third surface 38. The fourth surface 39 is a surface on the other axial side of the radial protrusion 43, and the fifth surface 40 is a surface on the radial inner side of the axial protrusion 42.

As shown in Fig. 5(B), in the state where the claw 31 is engaged with the protrusion 34, the first surface 36 and the fourth surface 39 are in surface contact, the second surface 37 and the fifth surface 40 are in surface contact, and the second surface The end surface 41 on one axial side of the column 22b and the third surface 38 are in surface contact. A protrusion 34 is interposed between the fourth surface 39 and the end surface 41 of the second column 22b, so that the second column 22b and the second annular body 30 are axially inseparably connected, so that the fifth surface 40 and the second surface 37 The contact, thereby positioning the column 22b and the second annular body 30 in the radial direction with respect to each other.

As shown in Figures 2 and 3, the third column 22c is on one side in the axial direction, and the claw 31 of the second column 22b is not provided. Also, if the first column 22a is not formed with the through hole 27 for the rivet 22, the first column 22a is not formed with the through hole 27 for the rivet 22. The end surface 44 on one side in the axial direction of the three pillars 22c forms a smooth surface along a plane that runs straight toward the central axis C1 (see FIG. 3) of the ring-shaped retainer 14. In addition, among the side surfaces on the other side in the axial direction of the second annular body 30, a surface 45 (refer to FIG. 2) facing the end surface 44 of the third column 22c is also formed along a straight line toward the center axis C1. The smooth surface of the plane. In a state where the retainer body 20 and the second annular body 30 are engaged and connected by the rivets 23 and the claws 31 and the protrusions 34, the end face 44 on one axial side of the third column 22c and the second annular body The surface 45 on the other side in the axial direction of 30 is in a contact state, and the third column 22c and the second annular 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 annular body 21 have high rigidity. For example, even if the cylindrical roller 13 is in contact with the third column 22c, they can still resist the resistance generated by the contact.

The retainer body 20 and the second ring body 30 are connected by the engagement of the rivet 23 and the claw 31 with the protrusion 34, so that the first ring body 21 and the second ring body 30 are adjacent to each other in the peripheral direction The space 29 between the columns 22 and 22 becomes a pocket for the cylindrical roller 13 (see Figure 1) that holds the rolling element.

As explained above, in the retainer 14, the number (full number) of the rivets 23 for connecting the retainer main body 20 and the second annular body 30 is less than the number (full number) of the posts 22. In this embodiment, the number of rivets 23 is less than the number of the posts 22. There are 15 rivets and 23 are 3 rivets. In addition, the 15 columns 22 include a first column 22a having a first through hole 27 through which the shaft 24 of the rivet 23 is inserted, and a second column 22a having a claw 31 at one end in the axial direction.柱22b. In addition, in this embodiment, in the total of 15 columns 22, although the end surface 44 on one axial side can contact the surface 45 on the other axial side of the second annular body 30, it includes The body 30 is the third column 22c in a non-connected state.

As described above, the 15 posts 22 provided in the retainer 14 include: the first post 22a connected to the second ring body 30 by the rivet 23, and the second ring by the engagement of the claw 31 and the protrusion 34 The second column 22b connected to the shaped body 30. That is, because the holder main body 20 and the second annular body 30 are connected, there is no need to insert the rivet 23 through all the 15 posts 22, and only the first post 22a of a part of the 15 posts 22 is needed. The rivet 23 is inserted in the middle, and the claw 31 and the protrusion 34 are engaged with the other second post 22b.

Therefore, in all the 15 posts 22 and the respective parts of the first ring body 21 and the second ring body 30 corresponding to all the posts 22, there is no through hole 27, 28 through which the rivet 23 is inserted. If necessary, as long as the three first pillars 22a and the first annular body 21 and the second annular body 30 are located only in the axially adjacent parts of the three first pillars 22a, a through hole is formed 27, 28 are fine. In addition, the rivets 23 are used in only three places corresponding to the three first posts 22a. As a result, the number of man-hours for hole processing or riveting for connecting the holder main body 20 and the second annular body 30 with the rivet 23 can be reduced, and the number of steps for manufacturing and assembling 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 this 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 in a non-connected state with the second ring body 30. As mentioned above, among the 15 columns 22, in addition to the first column 22a and the second column 22b, and the third column 22c, the rivet 23 is used to reduce the connection between the holder body 20 and the second ring body 30 . That is, among the 15 posts 22, a part (6 posts) is the second post 22b connected to the second ring body 30 by the claws 31 and the protrusions 34, and the rest (9 posts) are better used In the case of the first post 22a of the rivet 23, as in this embodiment, the third post 22c is further included (three), so that the number of the first post 22a using the rivet 23 can be reduced. Thereby, the number of manufacturing and assembling steps of the holder 14 can be further reduced.

Here, the assembly of the cage 14 and the cylindrical roller 13 will be described.　　 First, in the cage main body 20, the cylindrical roller 13 is arranged between the columns 22 and 22 adjacent in the peripheral direction. In this embodiment, as shown in Fig. 3, the side surface 47 facing the circumference of each column 22 has an arc surface shape with a radius slightly larger than that of the cylindrical roller 13, and the cylindrical roller 13 is arranged between the columns 22 and 22. It is in a state where it cannot fall off in the radial direction.

As described above, in the state where the cage main body 20 and the cylindrical roller 13 are combined, the second annular body 30 is positioned on one side of the cage main body 20 in the axial direction. At this time, as shown in FIG. 6, the claw 31 of the second column 22 b is inserted into the recess 33 of the second annular body 30 and is provided at the aforementioned space 35 adjacent to one side in the peripheral direction of the protrusion 34. 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 annular body 30 is relatively rotated toward one side in the peripheral direction (in the direction of arrow R in FIG. 6) with respect to the holder body 20 (second column portion 22b), the claw 31 can be engaged with the protrusion 34 Together.

In this state (refer to Figure 2), the first through hole 27 formed on the side of the holder body 20 and the second through hole 28 formed on the side of the second annular body 30 are in the same phase (the same position in the peripheral direction) , The rivet 23 is inserted through the through holes 27 and 28, and the end of the rivet 23 is riveted, so that the rivet 23 will not fall off. Thereby, the holder main body 20 and the second annular body 30 cannot rotate relative to each other, so that the engagement between the claw 31 and the protrusion 34 becomes an unreleasable state. As described above, in the present embodiment, in the recess 33, a space 35 into which the claw 31 can be inserted axially is provided on the side of one side in the peripheral direction of the protrusion 34, thereby making it easy to use the engagement of the claw 31 and the protrusion 34 to hold 14 is assembled, and when the assembly is completed, the holder main body 20 and the second ring body 30 are combined by the engagement mechanism of the claw 31 and the protrusion 34 to increase the rigidity of the holder 14.

In the above-mentioned embodiment (see FIG. 4), the recess 33 formed in the second annular body 30 is opened radially outward, but it may be opened radially inward. At this time, Fig. 2 is a view when the retainer 14 is viewed from the inside in the radial direction. In this case, the same function as the above-mentioned embodiment may also be provided.

FIG. 7 is a diagram showing a modification of the claw 31 of the second column 22b and the protrusion 34 of the concave portion 33 of the second ring body 30, and a part of the retainer 14 is viewed from the outside in the radial direction. In the form shown in FIG. 7, a protrusion 34 is also provided in a part of the peripheral direction of the recess 33. In addition, in the recess 33, a space 35 penetrating the axial direction is provided on one side in the peripheral direction, and a protrusion 34 serving as a barrier wall in the axial direction is provided on the other side in the peripheral direction. The protrusion 34 has a rectangular parallelepiped or cubic shape, and has a first surface 36 on one side in the axial direction; a second surface 37 on one side in the peripheral direction; and a third surface 38 on the other side in the axial direction. On the other hand, the claw 31 has an axial protrusion 42 protruding further toward one axial side from the end surface 41 on one axial side of the second column 22b, and a front from the axial one side of the axial protrusion 42 A peripheral direction projecting portion 46 that projects toward the other side in the peripheral direction. Thereby, the claw 31 has a fourth surface 39 opposed to the first surface 36 and a fifth surface 40 opposed to the second surface 37. In addition, the end surface 41 on one axial side of the second column 22b faces the third surface 38.

In the state where the claw 31 is engaged with the protrusion 34, the first surface 36 and the fourth surface 39 are in surface contact, the second surface 37 and the fifth surface 40 are in surface contact, and the end surface on one side in the axial direction of the second column 22 41 and the third surface 38 are in surface contact. A protrusion 34 is interposed between the fourth surface 39 and the end surface 41 of the second column 22b, so that the second column 22b and the second annular body 30 are inseparably connected in the axial direction. In addition, in the recess 33, a space 35 into which the claw 31 can be inserted in the axial direction is provided beside the protrusion 34 on one side in the circumferential direction, so it is similar to that shown in Figs. 5(A), 5(B) and 6 In the case of the same form, the assembly becomes easy, and when the holder main body 20 and the second ring body 30 are connected by the rivet 23, the engagement of the claw 31 and the protrusion 34 is made into a non-releasable state.

Although the embodiment disclosed above is exemplified in all points, it is not limited to this. That is, the cage and rolling bearing of the present invention are not limited to the form shown in the drawings, and other forms may be adopted 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 holder 14 of the aforementioned embodiment has been described for the case where it has the third post 22c in addition to the first post 22a and the second post 22b, but it does not have to have the third post 22c. That is, a part of the plurality of pillars 22 may be the first pillar 22a, and the others may be the second pillar 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 arranged in one row. In addition, the inner ring 11 and the outer ring 12 may have other forms. The cage 14 may hold a tapered roller, a needle roller, etc., in addition to the cylindrical roller 13, and may be a cage for a self-aligning roller bearing. "Furthermore, the rolling bearing provided with the retainer of the present invention may be used in addition to the bearing for the thrust of the pressure roll of the rolling mill.

This application is based on the description of the Japanese patent application (Japanese Patent Application 2017-150922) filed on August 3, 2017, and the content is incorporated hereafter.

10‧‧‧Rolling bearing (rolling element) 11‧‧‧Inner ring 12‧‧‧Outer ring 13‧‧‧Cylinder roller (rolling element)14‧‧‧Cage 20‧‧‧Cage body 21‧‧‧ First ring body 22‧‧‧Column 22a‧‧‧First column 22b‧‧‧Second column 22c‧‧‧Third column 23‧‧‧Rivet (shaft member) 27‧‧‧First through hole 28‧ ‧‧Second through hole 29‧‧‧Space 30‧‧‧Second ring body 31‧‧‧Claw 32‧‧‧Part 33‧‧‧Connecting with the second column 33‧‧‧Concave 34‧‧‧Protrusion 35‧‧ ‧Interval 36‧‧‧First surface 37‧‧‧Second surface 38‧‧‧Third surface 39‧‧‧Fourth surface 40‧‧‧Fifth surface 41‧‧‧End surface 45‧‧‧ Surface

Figure 1 is a cross-sectional view of the rolling bearing.　　 The second figure is a diagram of the state in which the ring-shaped retainer is expanded in a plane, when viewed from the outside in the radial direction.　　 Figure 3 is a view of the retainer body viewed from one side in the axial direction.　　 Figure 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 from the surrounding direction, and Figure 5(A) shows the state before the claw and the protrusion are engaged (non-engaged state) ), Figure 5(B) shows the state after the claws are engaged with the protrusions.　　 Figure 6 is a view of a part of the retainer viewed from one side in the axial direction.　　 Figure 7 is a diagram showing a modification example of the claws of the second column and the protrusions of the concave portion of the second annular body.　　 Figure 8 is a perspective view showing a part of a conventional retention example.

14‧‧‧Retainer

20‧‧‧Main body of retainer

21‧‧‧The first ring

22‧‧‧Column

22a‧‧‧First Pillar

22b‧‧‧Second Column

22c‧‧‧third pillar

23‧‧‧Rivets

24‧‧‧Shaft

25‧‧‧Head

26‧‧‧Riveting part

27‧‧‧First through hole

28‧‧‧Second through hole

29‧‧‧Space

30‧‧‧Second Ring

31‧‧‧Claw

32‧‧‧The part connected to the second column

33‧‧‧Concave

34‧‧‧Protrusion

35‧‧‧Interval

44‧‧‧end face

45‧‧‧Noodles

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; and a second annular body provided on one side of the axial direction of the plurality of columns Side; and shaft members, the number of which is less than the number of the above-mentioned posts, for axially penetrating the holder main body and the second ring-shaped body and connecting, located between the first ring-shaped body and the second ring-shaped body in the surrounding The spaces between the columns adjacent to each other in directions form pockets for holding the rolling elements. The plurality of columns includes a first column with a through hole through which the shaft member is inserted, and a second column on one side in the axial direction. The end of the second ring has a claw, and the second ring-shaped body has a recess for accommodating the claw at the portion connected to the second post, and a part of the recess is provided with a protrusion that engages with the claw; the second post and The second annular body is engaged with the protrusion with the claw, and the first post and the second annular body are connected by caulking the end of the shaft member. The retainer described in claim 1, wherein the plurality of posts further include an end surface on one side in the axial direction that can contact the surface on the other side in the axial direction of the second ring body and interact with the second ring The shape body becomes the third column in a non-connected state. The retainer described in claim 1 or 2, wherein the recess includes a space on one side in the peripheral direction of the protrusion that allows the claw to be inserted in the axial direction. The retainer described in item 1 or item 2 of the scope of patent application, wherein the recessed portion is opened toward the outside or inside in the radial direction, 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 in 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 on one side in the axial direction of the second column is opposed to the third surface, and the claws protrude from the end surface. A rolling bearing comprising: 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 holding the plurality of rolling elements, the cage being the first item in the scope of patent application ~ Any of the holders described in item 4.

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