JP2020118190A - Rolling bearing device - Google Patents

Abstract

To manufacture a retainer which makes problems, such as adhesion, less likely to occur even if an inner ring and an outer ring make slide contact.SOLUTION: A rolling bearing device includes: a first bearing ring 4; a second bearing ring 5; multiple rolling elements 6; and a retainer 9 which retains the rolling elements 6. The retainer 9 has a first annular body 51 disposed at one axial side of the rolling elements 6 and multiple pillars 53 extending to the other axial side. In at least one of an outer periphery and an inner periphery of the first annular body 51, a first slide member 54 (55) is welded intermittently in a circumferential direction. On at least the other axial direction side of the first slide member 54 (55), a first bead 70 (72) is formed. The first bead 70 (72) is formed closer to the one axial direction side than a side surface 63 at the other axial direction side of the first annular body 51.SELECTED DRAWING: Figure 2

Description

The present invention relates to a large rolling bearing device.

In a large machine such as a tunnel excavator, a rotating shaft is supported by a large rolling bearing device. For example, in the tunnel excavator of Patent Document 1, as shown in FIG. 8, a cutter head 81 for excavating the ground is supported by a rolling bearing device 80.

The rolling bearing device 80 includes a pair of outer rings 82a and 82b and an inner ring 83. The cutter head 81 is integrally fixed to the inner ring 83 in a direction orthogonal to the central axis m of the rolling bearing device 80.
A plurality of cylindrical rollers 84 are incorporated between the outer ring 82a and the inner ring 83, and the outer ring 82a supports the axial load acting during tunnel excavation via the cylindrical rollers 84. Further, a cylindrical roller 85 is incorporated between the inner ring 83 and the outer ring 82a in the radial direction, and the cutter head 81 fixed to the inner ring 83 rotates coaxially with the outer ring 82a. Further, a cylindrical roller 86 is incorporated between the outer ring 82b and the inner ring 83, and the inner ring 83 is held at a predetermined axial position.

Japanese Unexamined Patent Publication No. 02-304216

The plurality of cylindrical rollers 85 that support the radial load are held by a retainer 87 at predetermined intervals in the circumferential direction. The retainer 87 is a so-called machined retainer, and includes a pair of annular bodies 88, 88 arranged on both axial sides of the cylindrical roller 85, and a plurality of columns 89 connecting these in the axial direction. The cylindrical rollers 85 are incorporated one by one between the columns 89, 89 that are adjacent to each other in the circumferential direction.
When the rolling bearing device 80 rotates, the cage 87 rotates around the central axis m together with the cylindrical roller 85. At this time, since the pair of annular bodies 88, 88 make sliding contact with the outer ring 82 and the inner ring 83, normally, when the cage 87 is made of a copper alloy such as brass, problems such as adhesion on the sliding surface occur. It prevents it from happening.

However, the copper alloy is more expensive than a material such as iron, and in particular, in a large-sized rolling bearing device, since the diameter thereof reaches several meters, the retainer 87 becomes large, and the manufacturing cost of the rolling bearing device 80 increases. There is the problem of becoming expensive.
Therefore, an object of the present invention is to reduce the manufacturing cost of a rolling bearing device by inexpensively manufacturing a cage that is unlikely to cause problems such as adhesion even if it makes sliding contact with the inner ring or the outer ring.

The present invention relates to a first bearing ring having an inner raceway surface on the outer circumference, a second bearing ring arranged on the outer side in the radial direction of the first raceway and having an outer raceway surface on the inner circumference, and the inner raceway surface. A rolling bearing device comprising: a plurality of rolling elements rollably provided between the outer raceway surface and an outer raceway surface; and a retainer that holds the rolling elements, wherein the retainer is the first or the first A first annular body disposed on one side in the axial direction of the rolling element along the rolling element with the direction of the central axis of the two races as the axial direction, and on the other side in the axial direction of the first annular body. From the side surface, having a plurality of columns extending in the other axial direction through between the rolling elements adjacent to each other in the circumferential direction, on at least one of the outer circumference and the inner circumference of the first annular body, The first sliding member is welded and joined intermittently in the circumferential direction, and the first annular body and the first sliding member are joined to at least the other axial direction side of the first sliding member. A first bead is formed, and the first bead is formed on one axial direction side from a side surface on the other axial direction side of the first annular body.

According to the present invention, it is possible to provide a cage that can be manufactured at low cost and that is unlikely to cause problems such as adhesion even when it makes sliding contact with an inner ring or an outer ring. As a result, it is possible to reduce the manufacturing cost while ensuring the durability performance of the rolling bearing device, particularly the large-sized rolling bearing device.

1 is an axial sectional view of a rolling bearing device for a tunnel excavator according to a first embodiment of the present invention. It is a principal part enlarged view near the bearing part of the radial row|line|column in FIG. FIG. 4 is a perspective view of a cage incorporated in the radial row of the first embodiment. FIG. 4A is an axial partial cross-sectional view including the first annular body at the position Z in FIG. 3. FIG. 4B is a partial axial sectional view of the same position before cutting. 5A is an axial partial cross-sectional view including the second annular body at the position Z in FIG. FIG. 5B is a partial axial sectional view of the same position before cutting. FIG. 6 is a plan view seen from the outside in the radial direction around the central axis n of the cage when viewed in the direction of arrow P in FIGS. 4A and 5A. FIG. 7 is a plan view of the cage according to the second embodiment as viewed from the outside in the radial direction similarly to FIG. 6. It is an axial sectional view of a conventional rolling bearing device for a tunnel excavator.

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an axial cross-sectional view of a tunnel excavator equipped with a rolling bearing device 1 according to an embodiment of the present invention (hereinafter, referred to as “first embodiment”).
The tunnel excavator is a mechanical device for excavating the ground to construct a hole having a circular cross section, and a cutter head 2 having a blade for excavating the ground is supported by a rolling bearing device 1. In the following description, the direction of the central axis m of the rolling bearing device 1 is referred to as the axial direction, the direction orthogonal to the central axis m is referred to as the radial direction, and the direction around the central axis m is referred to as the circumferential direction. Further, in the axial direction, the left side of the figure is referred to as "one axial direction" and the right side is referred to as "the other axial direction".

The rolling bearing device 1 includes an inner ring 4 (first bearing ring), an outer ring 5 (second bearing ring), a first cylindrical roller 6 as a rolling element, a second cylindrical roller 7, a third cylindrical roller 8, each cylindrical roller 6 The first retainer 9 (corresponding to the “retainer” in the claims), the second retainer 10, the third retainer 11, and the first seal 13 and the second seal 14 respectively holding I have it. The inner ring 4 is assembled such that the first inner ring 4a and the second inner ring 4b, which are separated from each other, have their central axes aligned with each other and are in contact with each other in the axial direction. The outer ring 5 is assembled such that the first outer ring 5a and the second outer ring 5b, which are separated from each other, have their central axes aligned with each other and are in contact with each other in the axial direction and the radial direction.

The first inner ring 4 a is a steel annular body and is arranged on one axial side of the inner ring 4. The first inner ring 4a is manufactured using JIS G4053-2016 chrome molybdenum steel (steel material selected from SCM430, SCM432, SCM435, SCM440, SCM445, etc.) which is an alloy steel material for machine structure. The first inner ring 4a includes an inner raceway surface 15 that supports a radial load, a first axial raceway surface 16 that supports an axial load, a first radial extension surface 25, and a first axial extension surface 26, It has a second axially extending surface 27, a first side surface 28, a second side surface 30, and a first inner peripheral surface 29.

The inner raceway surface 15 is provided on the other side in the axial direction of the first inner ring 4a and is a cylindrical outer peripheral surface centered on the central axis m. The first radial extension surface 25 is a flat surface that extends radially outward from one axial end of the inner raceway surface 15 and is formed in a direction orthogonal to the central axis m. The first axially extending surface 26 extends from the outer periphery of the first radially extending surface 25 to one side in the axial direction, and is a cylindrical outer peripheral surface centered on the central axis m. The first axial raceway surface 16 extends outward in the radial direction from one axial end of the first axially extending surface 26, and is a plane formed in a direction orthogonal to the central axis m. The second axially extending surface 27 extends from the outer circumference of the first axial raceway surface 16 to one side in the axial direction, and is a cylindrical outer circumferential surface centered on the central axis m.
Thus, in the first inner race 4a, the first axial raceway surface 16 is provided at a position radially outward of the inner raceway surface 15 and displaced to one side in the axial direction.

The first side surface 28 is a side surface on the one axial side of the first inner ring 4a. The first side surface 28 extends inward in the radial direction from the one axial end of the second axially extending surface 27 and is a plane orthogonal to the central axis m. The second side surface 30 is a side surface on the other axial side of the first inner ring 4a. The second side surface 30 is a plane that extends radially inward from the other axial end of the inner raceway surface 15 and is orthogonal to the central axis m. The first side surface 28 and the second side surface 30 are parallel to each other. The second side surface 30 is a surface that comes into contact with a second inner ring 4b, which will be described later, and the plurality of first screw holes 21 extend in the axial direction at different positions in the circumferential direction.
Further, the first inner peripheral surface 29 of the first inner ring 4a is a cylindrical inner peripheral surface coaxial with the central axis m. The first inner peripheral surface 29 is provided on the other axial side of the first side surface 28 and on the one axial side of the second side surface 30.

The second inner ring 4b is a steel annular body and is arranged on the other axial side of the inner ring 4. The second inner ring 4b is manufactured using JIS G4053-2016 chrome-molybdenum steel (steel material selected from SCM430, SCM432, SCM435, SCM440, SCM445, etc.) which is an alloy steel material for machine structure. The second inner ring 4b includes a fourth axial raceway surface 17 that supports an axial load, a third axially extending surface 31, a third side surface 32, a fourth axially extending surface 35, and a fourth side surface 34. , The second inner peripheral surface 33.

The fourth axial raceway surface 17 is a flat surface formed on one axial side of the second inner ring 4b in a direction orthogonal to the central axis m.
The third axially extending surface 31 extends from the inner circumference of the fourth axial raceway surface 17 to one side in the axial direction, and is a cylindrical outer circumferential surface centered on the central axis m. The diameter of the third axially extending surface 31 is substantially the same as the diameter of the first axially extending surface 26. The third side surface 32 is a side surface on the one axial side of the second inner ring 4b. The third side surface 32 is a plane that extends radially inward from one axial end of the third axially extending surface 31 and that is orthogonal to the central axis m. The third side surface 32 contacts the second side surface 30.

The fourth axially extending surface 35 extends from the outer circumference of the fourth axial raceway surface 17 to the other side in the axial direction, and is a cylindrical outer circumferential surface centered on the central axis m. The fourth side surface 34 is a side surface on the other axial side of the second inner ring 4b. The fourth side surface 34 extends inward in the radial direction from the other axial end of the fourth axially extending surface 35, and is a plane orthogonal to the central axis m. The third side surface 32 and the fourth side surface 34 are parallel to each other.
The second inner peripheral surface 33 of the second inner ring 4b is a cylindrical inner peripheral surface coaxial with the central axis m. The second inner peripheral surface 33 is provided on the other axial side of the third side surface 32 and on the one axial side of the fourth side surface 34. The diameter of the first inner peripheral surface 29 of the first inner ring 4a and the diameter of the second inner peripheral surface 33 of the second inner ring 4b are substantially the same.

A plurality of first through holes 22 that axially penetrate the third side surface 32 and the fourth side surface 34 are formed in the second inner ring 4b. The first through hole 22 is provided so as to communicate with the plurality of first screw holes 21 when the center lines of the first inner ring 4a and the second inner ring 4b are aligned.

The first outer ring 5a is a steel annular body. In the first embodiment, the first outer ring 5a uses chrome molybdenum steel (steel material selected from SCM430, SCM432, SCM435, SCM440, SCM445, etc.) which is JIS G4053-2016 alloy steel steel for machine structure. The first outer ring 5a has a substantially rectangular cross section in the axial direction. The first outer ring 5a includes an outer raceway surface 18, a second axial raceway surface 19, a third axial raceway surface 20, a second radial extension surface 37, and a fifth axial extension surface 36. ing.

The outer raceway surface 18 is provided on the inner circumference of the first outer ring 5a. The outer raceway surface 18 is a cylindrical inner peripheral surface centered on the central axis m. The second axial raceway surface 19 is provided on one side of the outer raceway surface 18 in the axial direction and on the radially outer side of the outer raceway surface 18. The second axial raceway surface 19 is a plane that is orthogonal to the central axis m and is a surface on one side in the axial direction. The second axial raceway surface 19 extends radially outward from one axial end of the outer raceway surface 18. The third axial raceway surface 20 is provided on the other axial side of the outer raceway surface 18 and radially outward of the outer raceway surface 18. The third axial raceway surface 20 is a plane that is orthogonal to the central axis m and is the surface on the other side in the axial direction. The third axial raceway surface 20 extends radially outward from the other axial end of the outer raceway surface 18.

The second radially extending surface 37 is provided on the radially outer side of the second axial raceway surface 19. The second radially extending surface 37 is a surface on one side in the axial direction that is orthogonal to the central axis m, and is a single plane that is continuous with the second axial raceway surface 19. The plurality of second screw holes 23 extend from the second radial extension surface 37 to the other side in the axial direction at different positions in the circumferential direction. The fifth axial extending surface 36 is provided on the other axial side of the second radial extending surface 37 and on the one axial side of the third axial raceway surface 20. The fifth axially extending surface 36 is a cylindrical outer peripheral surface centered on the central axis m.

The second outer ring 5b is a steel annular body. In the first embodiment, the second outer ring 5b uses chrome molybdenum steel (steel material selected from SCM430, SCM432, SCM435, SCM440, SCM445, etc.) which is JIS G4053-2016 alloy steel steel for machine structure. The second outer ring 5b includes a sixth axially extending surface 38, a third radial extending surface 39, a seventh axially extending surface 40, a sixth side surface 41, a seventh side surface 44, and a first side surface. The outer peripheral surface 42 and the teeth 43 are provided. The second outer ring 5b is a gear having teeth 43.

The sixth axially extending surface 38 is provided on the other axial side of the second outer ring 5b and on the radially inner side. The sixth axially extending surface 38 is a cylindrical inner peripheral surface centered on the central axis m. The third radially extending surface 39 is provided on one axial side of the sixth axially extending surface 38. The third radially extending surface 39 is a plane that is a surface on the other side in the axial direction that is orthogonal to the central axis m. The third radially extending surface 39 extends radially inward from the one axial end of the sixth axially extending surface 38. The seventh axially extending surface 40 is provided on one axial side of the third radially extending surface 39. The seventh axially extending surface 40 is a cylindrical inner peripheral surface centered on the central axis m. The seventh axially extending surface 40 extends from the inner circumference of the third radial extending surface 39 to the one axial side. The sixth side surface 41 is provided on one axial side of the seventh axially extending surface 40. The sixth side surface 41 is a plane which is a surface on one side in the axial direction, which is orthogonal to the central axis m. The sixth side surface 41 extends outward in the radial direction from the one axial end of the seventh axially extending surface 40.

The seventh side surface 44 is provided on the other axial side of the sixth axially extending surface 38. The seventh side surface 44 is a plane that is a surface on the other side in the axial direction that is orthogonal to the central axis m. The seventh side surface 44 extends outward in the radial direction from the end on the other side in the axial direction of the sixth axially extending surface 38.

The first outer peripheral surface 42 is provided on the other axial side of the sixth side surface 41. The first outer peripheral surface 42 is a cylindrical outer peripheral surface centered on the central axis m. The first outer peripheral surface 42 extends from the outer periphery of the sixth side surface 41 to the other side in the axial direction.
The teeth 43 are provided on the other axial side of the first outer peripheral surface 42 and on the one axial side of the seventh side surface 44. The tooth 43 has a tip circle centered on the central axis m on the radially outer side and a root circle centered on the center axis m on the radially inner side.
The second outer ring 5b is provided with a plurality of second through holes 24 that penetrate the sixth side surface 41 and the third radially extending surface 39 in the axial direction. The second through hole 24 is provided so as to communicate with the plurality of second screw holes 23 when the center lines of the first outer ring 5a and the second outer ring 5b are aligned.

As shown in FIG. 1, the rolling bearing device 1 has a form in which a first outer ring 5a is sandwiched and a first inner ring 4a and a second inner ring 4b are joined with their respective central axes aligned. The first inner race 4a and the second inner race 4b are combined so that the first axial raceway surface 16 and the fourth axial raceway surface 17 face each other in the axial direction. The first inner ring 4a and the second inner ring 4b are coupled by abutting the second side surface 30 and the third side surface 32 in the axial direction. The first inner ring 4a and the second inner ring 4b are connected to each other by a bolt (not shown) screwed into the first screw hole 21 through the first through hole 22 so as not to be relatively displaced.

Further, the rolling bearing device 1 has a form in which the first outer ring 5a and the second outer ring 5b are joined with their central axes aligned. In the first outer ring 5a and the second outer ring 5b, the second radial extension surface 37 and the third radial extension surface 39 are brought into axial contact with each other, and the fifth axial extension surface 36 and the sixth axial surface. The direction extending surface 38 and the direction extending surface 38 are brought into contact with each other in the radial direction to be coupled. The first outer ring 5a and the second outer ring 5b are coupled to each other by a bolt (not shown) screwed into the second screw hole 23 through the second through hole 24 so as not to be relatively displaced.

The outer raceway surface 18 faces the inner raceway surface 15 in the radial direction. A plurality of first cylindrical rollers 6 are incorporated between the outer raceway surface 18 and the inner raceway surface 15. Each first cylindrical roller 6 is incorporated with the central axis of the first cylindrical roller 6 oriented in the axial direction, and is rollable in the circumferential direction. Further, as will be described in detail later, each first cylindrical roller 6 is held by the first cage 9 at predetermined intervals in the circumferential direction. In the following description, the bearing portion including the outer raceway surface 18, the inner raceway surface 15 and the plurality of first cylindrical rollers 6 is referred to as a radial row.

The second axial raceway surface 19 axially faces the first axial raceway surface 16. A plurality of second cylindrical rollers 7 are rotatably incorporated between the first axial raceway surface 16 and the second axial raceway surface 19 with the central axis of the second cylindrical roller 7 oriented in the radial direction. Each second cylindrical roller 7 is held by the second cage 10 at predetermined intervals in the circumferential direction. The second cage 10 is formed by arranging a plurality of arc-shaped second cage segments (not shown) in the circumferential direction around the central axis of the second cage 10. In the following description, the bearing portion composed of the first axial raceway surface 16, the second axial raceway surface 19, and the plurality of second cylindrical rollers 7 is referred to as a first thrust train.

The second cage 10 is radially retained by the first axially extending surface 26 of the first inner ring 4a and the seventh axially extending surface 40 of the second outer ring 5b. When the central axis of the second cage 10 and the central axis m of the rolling bearing device 1 are aligned with each other, the second cage 10 has the first axial raceway surface 16, the second axial raceway surface 19, and the first axial direction extending direction. It opposes each of the existing surface 26 and the seventh axially extending surface 40 with a gap. The second cage 10 is arranged so as to be able to contact the first axial raceway surface 16, the second axial raceway surface 19, the first axially extending surface 26, and the seventh axially extending surface 40.
The second cylindrical roller 7 uses JIS G4805-2008 high carbon chrome bearing steel material (steel material selected from SUJ2, SUJ3, SUJ5). The second cage segment constituting the second cage 10 is JIS H3250-2015 copper and aluminum bronze (C6161, C6181, C6241) of copper alloy rod, high strength brass (C6782, C6783), JIS H5121-2016 copper. A copper alloy selected from high-strength brass (CAC301C, CAC302C, CAC303C, CAC304C) of the alloy continuous casting is used.

The third axial raceway surface 20 is formed on the opposite side of the first outer ring 5a in the axial direction from the second radial extension surface 37, facing the other side in the axial direction orthogonal to the central axis m. 4b is axially opposed to the fourth axial raceway surface 17 which is also formed on one side in the axial direction, which is also orthogonal to the central axis m. Between the third axial raceway surface 20 and the fourth axial raceway surface 17, two rows of a plurality of third cylindrical rollers 8 are arranged with the central axes of the two rows of a plurality of third cylindrical rollers 8 being directed in the radial direction. It is incorporated so that it can roll freely. The two third rows of the third cylindrical rollers 8 are held by the third cage 11 at predetermined intervals in the circumferential direction. The third cage 11 is formed by arranging a plurality of arc-shaped third cage segments (not shown) in the circumferential direction around the central axis of the third cage 11. In the following description, the bearing portion including the third axial raceway surface 20, the fourth axial raceway surface 17, and the plurality of third cylindrical rollers 8 is referred to as a second thrust row.

The third cylindrical rollers 8 are incorporated in two rows in the circumferential direction, and the third cylindrical rollers 8 in each row are arranged such that the central axis is one row along the radial direction. The two third cylindrical rollers 8 arranged in a row along the radial direction are held in one pocket 58 of the third cage 11. The third cage 11 is radially held by the third axially extending surface 31 of the second inner ring 4b and the sixth axially extending surface 38 of the second outer ring 5b. When the central axis of the third cage 11 and the central axis m of the rolling bearing device 1 are aligned with each other, the third cage 11 includes the third axial raceway surface 20, the fourth axial raceway surface 17, and a third axial extension. The facing surface 31 and the sixth axially extending surface 38 are opposed to each other with a gap. The third cage 11 is arranged so as to be able to contact the third axial raceway surface 20, the fourth axial raceway surface 17, the third axially extending surface 31, and the sixth axially extending surface 38.
The third cylindrical roller 8 uses JIS G4805-2008 high carbon chrome bearing steel steel material (steel material selected from SUJ2, SUJ3, SUJ5). The third cage segment constituting the third cage 11 is JIS H3250-2015 copper and aluminum bronze of a copper alloy rod (C6161, C6191, C6241), high strength brass (C6782, C6783), JIS H5121-2016. A copper alloy selected from high-strength brass (CAC301C, CAC302C, CAC303C, CAC304C) of a copper alloy continuous casting is used.

Thus, in the rolling bearing device 1 of the first embodiment, the outer ring 5 is radially supported by the radial row bearing portion with respect to the inner ring 4, and can rotate about the central axis of the inner ring 4.
The cutter head 2 is driven by the power transmitted from the power source through a gear (not shown) that rotates and has teeth that are combined with the teeth 43 on the outer periphery of the second outer ring 5b (gear). A hole such as a tunnel can be constructed in the ground by moving the cutter head 2 along with the rolling bearing device 1 to one side in the axial direction while rotating. When excavating the ground, a large axial load acts in the axial direction. This load is supported by the bearing portion of the second thrust train. At this time, the weight of the outer ring 5 and the cutter head 2 mainly acts as a radial load on the bearing portion of the radial row.

The first thrust row supports the outer ring 5 on one side in the axial direction, and prevents the outer ring 5 from being displaced to one side in the axial direction. The load acting on the first thrust train is smaller than the load acting on the second thrust train.

Further, the first seal 13 seals the clearance between the second outer ring 5b and the first inner ring 4a on the one axial side. The first seal 13 is fixed to an annular groove that is formed on the seventh axially extending surface 40 of the second outer ring 5b about the central axis m and that is recessed radially outward. The first seal 13 slidably contacts the first side surface 28 of the first inner ring 4a.
The second seal 14 seals the clearance between the second outer ring 5b and the second inner ring 4b on the other side in the axial direction. The second seal 14 is fixed to an annular groove that is formed in the fourth axially extending surface 35 of the second inner ring 4b about the central axis m and that is recessed radially inward. The second seal 14 slidably contacts the seventh side surface 44 of the second outer ring 5b.
This prevents water, dust, and the like during ground excavation from entering the space surrounded by the inner ring 4, the outer ring 5, the first seal 13, and the second seal 14 of the rolling bearing device 1.

The bearing portion of the radial row will be described in more detail. FIG. 2 is an enlarged view of a main part of the bearing unit of the radial row in FIG. In the radial row, the first cylindrical roller 6 and the first cage 9 are arranged between the inner ring 4 and the outer ring 5. The first cylindrical roller 6 and the first cage 9 are arranged with a slight axial gap between the first radially extending surface 25 and the third side surface 32. The first cage 9 can be rotated in the circumferential direction by being guided by the first radially extending surface 25 and the third side surface 32.
The first cylindrical roller 6 is a steel roller. In the first embodiment, the first cylindrical roller 6 uses JIS G4805-2008 high carbon chrome bearing steel steel material (steel material selected from SUJ2, SUJ3, SUJ5).

FIG. 3 is a perspective view of the first cage 9 incorporated in the radial row and shows a part of the shape in the circumferential direction. The first cage 9 is annular as a whole with the central axis n of the first cage 9 as a center, and a plurality of the first cage segments 9s in FIG. Is configured. The first cage 9 is incorporated so that the central axis n is coaxial with the central axis m of the rolling bearing device 1. In the following description, unless otherwise specified, with respect to the first retainer 9, and the first annular body 51 and the second annular body 52 forming the first retainer 9, the first retainer segment 9s is in the circumferential direction. The first annular retainer 9 and the first annular body 51 and the second annular body 52, which are annularly arranged side by side, respectively.

The first cage segment 9s includes an arc-shaped first annular body 51, an arc-shaped second annular body 52, a plurality of columns 53, a plurality of outer diameter side first sliding members 54, and an outer diameter side second slide. The member 56, the inner diameter side first sliding member 55, and the inner diameter side second sliding member 57 are provided.

The first annular body 51, the second annular body 52, and the column 53 are all made of steel. In 1st Embodiment, the 1st annular body 51, the 2nd annular body 52, and the pillar 53 are JIS G3101-2015 rolling steel materials for general structures (SS330, SS400, SS490, SS540), JIS G4051-2016 carbon for machine structure. Steel Steel materials (S10C, S12C, S15C, S17C, S20C, S22C, S25C, S28C, S30C, S33C, S35C, S38C, S40C, S43C, S45C, S48C, S50C, S53C, S55C, S58C, S60C, S65C, S70C, S75C, S70C, S75C, S70C, S70C , S09CP, S15CK, S20CK), JIS G3106-2015, and steel materials selected from rolled steel materials for welding structures (SM400A, SM400B, SM400C, SM490A, SM490B, SM490C, SM490YA, SM490YB, SM520B, SM520C, SM570).

The first annular body 51 and the second annular body 52 each have a substantially rectangular axial cross section, and have substantially the same shape. They are arranged axially apart from each other such that their central axes coincide with the central axis n. The first annular body 51 and the second annular body 52 are connected to each other by a plurality of columns 53 extending in the axial direction. Each pillar 53 has a substantially rectangular cross section in a direction orthogonal to the central axis n. Further, the columns 53 are arranged at predetermined intervals in the circumferential direction.
In addition, at the connection portion between the first cage segment 9s and the first cage segment 9s that are adjacent to each other in the circumferential direction, the columns 53 at both circumferential end portions are combined to form one column.

Thus, the first cage segment 9s is surrounded by the first annular body 51 and the second annular body 52, and the two columns 53 that are adjacent to each other in the circumferential direction, and a space that penetrates in the radial direction (hereinafter, referred to as " Pockets 58") are formed side by side in the circumferential direction. A plurality of first cylindrical rollers 6 are incorporated in each pocket 58 one by one with the central axis thereof oriented in the axial direction. The axial dimension of the pocket 58 is slightly larger than the axial length of the first cylindrical roller 6. Further, when the first cage segment 9s is located at any position between the inner raceway surface 15 and the outer raceway surface 18, it does not simultaneously contact both of the two adjacent columns 53 of the first cylindrical roller 6. As a result, each first cylindrical roller 6 can rotate about its central axis within the pocket 58.

The outer diameter side first sliding member 54, the outer diameter side second sliding member 56, the inner diameter side first sliding member 55, and the inner diameter side second sliding member 57 are made of a copper alloy such as brass or aluminum bronze. is there. In the first embodiment, the outer diameter side first sliding member 54, the outer diameter side second sliding member 56, the inner diameter side first sliding member 55, and the inner diameter side second sliding member 57 are JIS H3250-2015. Select from aluminum bronze (C6161, C6181, C6241), high-strength brass (C6782, C6783), JIS H5121-22016 copper alloy continuous casting cast high-strength brass (CAC301C, CAC302C, CAC303C, CAC304C) of copper and copper alloy rods. The copper alloy is used.

The inner diameter side first sliding member 55 (first sliding member) is on the inner circumference of the first annular body 51, and the inner diameter side second sliding member 57 (second sliding member) is on the second annular body. The inner circumference of 52 is attached by welding at predetermined intervals in the circumferential direction. In the first embodiment, the inner diameter side first sliding member 55 and the inner diameter side second sliding member 57 are respectively arranged on the inner circumferences of the first and second annular bodies 51, 52 for each first cage segment 9s. It is installed at three locations (in the vicinity of both ends and in the center of the circumferential direction of each first cage segment 9s). The inner diameter side first sliding member 55 and the inner diameter side second sliding member 57 have substantially the same shape, and the surfaces contacting the first or second annular bodies 51, 52 are along the annular bodies 51, 52. It is curved and has an arcuate shape whose inner peripheral surface is a part of a cylindrical surface centered on the central axis n of the first cage 9.
The diameter of a virtual inner peripheral surface connecting the inner peripheral surfaces of the inner diameter-side first sliding members 55 attached to the inner peripheral surface of the first annular body 51, and the inner diameter-side first diameters of the virtual inner peripheral surfaces attached to the inner peripheral surface of the second annular body 52. The diameter of the virtual inner peripheral surface connecting the inner peripheral surfaces of the two sliding members 57 is slightly larger than the outer diameter of the inner raceway surface 15 of the inner ring 4.

The outer diameter side first sliding member 54 (first sliding member) is on the outer periphery of the first annular body 51, and the outer diameter side second sliding member 56 (second sliding member) is the second annular member. The body 52 is attached to the outer periphery of the body 52 by welding joining at predetermined intervals in the circumferential direction. In the first embodiment, the outer-diameter-side first sliding member 54 and the outer-diameter-side second sliding member 56 are located on the outer circumference of the first and second annular bodies 51 and 52 for each first cage segment 9s. It is installed at three locations (near each end and in the center of each first cage segment 9s in the circumferential direction). The outer diameter side first sliding member 54 and the outer diameter side second sliding member 56 have substantially the same shape, and the surfaces contacting the first or second annular bodies 51, 52 are the annular bodies 51, 52. Has an arcuate shape whose outer peripheral surface is a part of a cylindrical surface centered on the central axis n of the first cage 9.
The diameter of an imaginary outer peripheral surface connecting the outer peripheral surfaces of the outer diameter side first sliding members 54 attached to the outer periphery of the first annular body 51, and the outer diameter side second slides attached to the outer periphery of the second annular body 52. The diameter of the virtual outer peripheral surface connecting the outer peripheral surfaces of the moving member 56 is slightly smaller than the inner diameter of the outer raceway surface 18 of the outer ring 5.

In the first embodiment, the outer diameter side first sliding member 54, the outer diameter side second sliding member 56, the inner diameter side first sliding member 55, and the inner diameter side second sliding member 57 are arranged in the circumferential direction. As shown in FIG. 3, the length is such that it spans a few pockets 58. Thus, the outer diameter side first sliding member 54, the outer diameter side second sliding member 56, the inner diameter side first sliding member 55, and the inner diameter side second sliding member 57 are connected to the outer circumference of each annular body 51, 52 or Since they are intermittently arranged on the inner circumference, the outer diameter side first sliding member 54, the outer diameter side second sliding member 56, the inner diameter side first sliding member 55, and the inner diameter side second sliding member 57 are arranged. Is arranged on the entire circumference of the outer circumference or the inner circumference of each annular body 51, 52, or compared with the case where the entire first cage 9 is manufactured from a copper alloy, the copper alloy used for one first cage 9 is The amount can be reduced.
Thus, by reducing the amount of expensive copper alloy used, the manufacturing cost of the first cage 9 can be significantly reduced. The shapes of the outer diameter side first sliding member 54, the outer diameter side second sliding member 56, the inner diameter side first sliding member 55, and the inner diameter side second sliding member 57, and one first cage 9 are used. The number and the like incorporated in the above are examples, and the present invention is not limited to the form described here.

4 to 6, the outer diameter side first sliding member 54 and the inner diameter side first sliding member 55 are joined to the first annular body 51, and the outer diameter side second sliding member 56 and The joining state between the inner diameter side second sliding member 57 and the second annular body 52 will be described in detail. The joining state between each inner diameter side first sliding member 55 and the first annular body 51 and the joining state between each inner diameter side second sliding member 57 and the second annular body 52 are the same, and each outer diameter side first The joining state between the first sliding member 54 and the first annular body 51 is the same as the joining state between the outer diameter side second sliding members 56 and the second annular body 52.

4, the inner diameter side first sliding member 55 attached to the inner circumference of the first annular body 51 and the outer diameter side attached to the outer circumference of the first annular body 51 at the position indicated by Z in FIG. The first sliding member 54 will be described.
FIG. 4A is a partial axial sectional view of the first cage segment 9s at the position indicated by Z in FIG. FIG. 4B is a partial cross-sectional view in the same direction as FIG. 4A, after welding the inner diameter side first sliding member 55 and the first annular body 51 and at the outer diameter side. It shows a state after the first sliding member 54 and the first annular body 51 have been welded and joined, but before grinding (details will be described later).
FIG. 5A is an axial partial cross-sectional view of the first cage segment 9s at the position indicated by Z in FIG. 5B is a partial cross-sectional view in the same direction as FIG. 5A, after welding the inner diameter side second sliding member 57 (second sliding member) and the second annular body 52. A state after the welding of the outer diameter side second sliding member 56 (second sliding member) and the second annular body 52, and before grinding (details will be described later). Is shown.

Further, FIG. 6 is a plan view seen from the outside in the radial direction around the central axis n of the first cage 9 when viewed in the direction of arrow P in FIGS. 4A and 5A. Is. In FIG. 6, the outer diameter side first sliding member 54, the inner diameter side first sliding member 55, the first annular body 51, and the outer diameter side second sliding member 56 and the inner diameter side second sliding member 57. The shape of the bead after welding and joining the second annular body 52 and the second annular body 52 before grinding is shown by a broken line. 4, 5 and 6, the left side of the figure will be described as one axial direction and the right side of the figure will be described as the other axial direction in correspondence with FIG.

As shown in FIG. 6, recesses 60 are intermittently formed on the side surface 59 on one axial side of the first annular body 51 in the circumferential direction centered on the central axis n of the first retainer 9. The recess 60 is defined by a bottom surface 60b and inclined surfaces 60a and 60c on both sides in the circumferential direction. The bottom surface 60b is present at a position displaced by t1 from the side surface 59 to the other side in the axial direction (the side closer to the pocket 58 in the axial direction). On the side surface 61 on the other axial side of the second annular body 52, recesses 62 are formed intermittently in the circumferential direction around the central axis n of the first retainer 9. The recess 62 is defined by a bottom surface 62b and inclined surfaces 62a, 62c on both sides in the circumferential direction. The bottom surface 62b is located at a position displaced from the side surface 61 by one side in the axial direction (the side closer to the pocket 58 in the axial direction) by t2. The sizes t1 and t2 are almost equal to each other.

Please refer to FIG. 4 and FIG. When manufacturing the first cage segment 9s, the outer diameter side first sliding member 54 is welded and fixed to the first annular body 51, and the outer diameter side second sliding member 56 is welded to the second annular body 52. Then, the inner diameter side first sliding member 55 is welded and fixed to the first annular body 51, and the inner diameter side second sliding member 57 is welded and fixed to the second annular body 52. These are in no particular order.

In FIG. 4B, the first annular body 51 and the outer diameter side first sliding member 54 are welded and the first annular body 51 and the inner diameter side first sliding member 55 are welded and the outer diameter is The state where the side first beads 69, the outer diameter side second beads 70, the inner diameter side first beads 71, and the inner diameter side second beads 72 are formed is shown.
In FIG. 5B, the second annular body 52 and the outer diameter side second sliding member 56 are welded to each other, and the second annular body 52 and the inner diameter side second sliding member 57 are welded to each other to have the outer diameter. The state where the third side bead 73, the outer diameter side fourth bead 74, the inner diameter side third bead 75, and the inner diameter side fourth bead 76 are formed is shown.

As shown in FIG. 4B, the side surface 65 on one axial side of the outer diameter side first sliding member 54 and the bottom surface 60b on one axial side of the first annular body 51 are flush with each other. The outer diameter side first sliding member 54 is placed on the outer periphery of the first annular body 51. The axial thickness t54 of the outer diameter side first sliding member 54 is smaller than the axial thickness t51 of the first annular body 51. Therefore, the side surface 54b on the other side in the axial direction of the outer diameter side first sliding member 54 is displaced to the one side in the axial direction from the side surface 63 on the other side in the axial direction of the first annular body 51. On the other side in the axial direction of the outer diameter side first sliding member 54, a part of the outer peripheral surface 51b of the first annular body 51 is exposed in the radial direction.
A groove with an inclination angle of about 45° is provided on the inner circumference of the outer diameter side first sliding member 54 and the outer circumference of the first annular body 51, respectively. In this state, the abutting portions of the first annular body 51 and the outer diameter side first sliding member 54 on both sides in the axial direction of the outer diameter side first sliding member 54 are arranged in the circumferential direction of the first annular body 51. Welded along. Arc welding is preferably used as the welding method. Thus, the outer diameter side first bead 69 and the outer diameter side second bead that join the first annular body 51 and the outer diameter side first sliding member 54 to both sides in the axial direction of the outer diameter side first sliding member 54. 70 is formed.

As shown in FIG. 5B, the side surface 67 on the other axial side of the outer diameter side second sliding member 56 and the bottom surface 62b on the other axial side of the second annular body 52 are flush with each other. The outer diameter side second sliding member 56 is placed on the outer periphery of the second annular body 52. The axial thickness t56 of the outer diameter side second sliding member 56 is smaller than the axial thickness t52 of the second annular body 52. Therefore, the side surface 56b of the outer diameter side second sliding member 56 on the one axial direction side is displaced from the side surface 64 of the second annular body 52 on the one axial side direction to the other axial side direction, On the one side in the axial direction of the outer diameter side second sliding member 56, a part of the outer peripheral surface 52b of the second annular body 52 is exposed in the radial direction.
A groove with an inclination angle of approximately 45° is provided on each of the inner circumference of the outer diameter side second sliding member 56 and the outer circumference of the second annular body 52. In this state, the contact portions of the second annular body 52 and the outer diameter side second sliding member 56 are arranged in the circumferential direction of the second annular body 52 on both sides of the outer diameter side second sliding member 56 in the axial direction. Welded along. Arc welding is preferably used as the welding method. Thus, the outer diameter side third bead 73 and the outer diameter side fourth bead that join the second annular body 52 and the outer diameter side second sliding member 56 to both sides of the outer diameter side second sliding member 56 in the axial direction. 74 is formed.

As shown in FIG. 4B, the side surface 66 of the inner diameter side first sliding member 55 on the one axial side and the bottom surface 60b of the first annular body 51 on the one axial side are flush with each other. The inner diameter side first sliding member 55 is placed on the inner circumference of the first annular body 51. The axial thickness t55 of the inner diameter side first sliding member 55 is smaller than the axial thickness t51 of the first annular body 51. Therefore, the side surface 55b on the other side in the axial direction of the inner diameter side first sliding member 55 is displaced to the one side in the axial direction from the side surface 63 on the other side in the axial direction of the first annular body 51. On the other side in the axial direction of the side first sliding member 55, a part of the inner peripheral surface 51a of the first annular body 51 is exposed in the radial direction.
A groove with an inclination angle of approximately 45° is provided on the outer circumference of the inner diameter side first sliding member 55 and the inner circumference of the first annular body 51, respectively. In this state, the contact portions of the first annular body 51 and the inner diameter side first sliding member 55 on both sides in the axial direction of the inner diameter side first sliding member 55 are arranged along the circumferential direction of the first annular body 51. Welded and joined. Arc welding is preferably used as the welding method. Thus, the inner diameter side first bead 71 and the inner diameter side second bead 72 that join the first annular body 51 and the inner diameter side first sliding member 55 are formed on both sides of the inner diameter side first sliding member 55 in the axial direction. It

As shown in FIG. 5B, the side surface 68 on the other axial side of the inner diameter side second sliding member 57 and the bottom surface 62b on the other axial side of the second annular body 52 are flush with each other. The inner diameter side second sliding member 57 is placed on the inner circumference of the second annular body 52. The axial thickness t57 of the inner diameter side second sliding member 57 is smaller than the axial thickness t52 of the second annular body 52. Therefore, the side surface 57b of the inner diameter side second sliding member 57 on the one axial direction side is displaced from the side surface 57b on the one axial direction side of the second annular body 52 on the other axial side side, and the inner diameter side On the one side in the axial direction of the second side sliding member 57, a part of the inner peripheral surface 52a of the second annular body 52 is exposed in the radial direction.
A groove with an inclination angle of approximately 45° is provided on the outer circumference of the inner diameter side second sliding member 57 and the inner circumference of the second annular body 52, respectively. In this state, the contact portions of the second annular body 52 and the inner diameter side second sliding member 57 on both sides in the axial direction of the inner diameter side second sliding member 57 are arranged along the circumferential direction of the second annular body 52. Welded and joined. Arc welding is preferably used as the welding method. Thus, the inner diameter side third bead 75 and the inner diameter side fourth bead 76 for joining the second annular body 52 and the inner diameter side second sliding member 57 are formed on both sides of the inner diameter side second sliding member 57 in the axial direction. It

As shown in FIG. 4B, the outer diameter side first bead 69 on the one side in the axial direction of the outer diameter side first sliding member 54 extends from the bottom surface 60 b of the first annular body 51 toward the one side in the axial direction. It is formed in a state of being raised beyond the side surface 59.
The outer diameter side second bead 70 (first bead) on the other side in the axial direction of the outer diameter side first sliding member 54 is located in the other side in the axial direction from the side surface 54b of the outer diameter side first sliding member 54. It is formed in a state of being raised toward the side. In the first embodiment, the axial dimension δ54 (δ54=t51-t54) of the outer peripheral surface 51b of the first annular body 51 that is exposed in the radial direction on the other axial side of the outer diameter side first sliding member 54 is , Is set to be larger than the rising amount of the second bead 70 on the outer diameter side in the axial direction. Therefore, even after the welding is completed, a part of the outer peripheral surface 51b of the first annular body 51 is radially exposed on the other side in the axial direction from the outer diameter side second bead 70, and the outer diameter side second bead 70 is exposed. The bead 70 is formed on the one side in the axial direction with respect to the side surface 63. Therefore, the outer diameter side second bead 70 does not project to the side surface 63 (which is the inner surface of the pocket 58).

The inner diameter side first bead 71 on one side in the axial direction of the inner diameter side first sliding member 55 is formed in a state of rising from the bottom surface 60b of the first annular body 51 toward the one side in the axial direction over the side surface 59. ..
Further, the inner diameter side second bead 72 (first bead) of the inner diameter side first sliding member 55 on the other side in the axial direction is directed from the side surface 55b of the inner diameter side first sliding member 55 to the other side in the axial direction. It is formed in a raised state. In the first embodiment, the axial dimension δ55 (δ55=t51-t55) of the inner peripheral surface 51a of the first annular body 51 exposed in the radial direction on the axial other direction side of the inner diameter side first sliding member 55 is , Is set larger than the amount of protrusion of the second bead 72 on the inner diameter side in the axial direction. Therefore, even after the welding is completed, a part of the inner peripheral surface 51a of the first annular body 51 is exposed in the radial direction on the axial other direction side from the inner diameter side second bead 72, and the inner diameter side second bead 72 is exposed. 72 is formed on the one side in the axial direction with respect to the side surface 63. Therefore, the inner diameter side second bead 72 does not project to the side surface 63 (which is the inner surface of the pocket 58).

As shown in FIG. 5B, the outer diameter side third bead 73 on the other side in the axial direction of the outer diameter side second sliding member 56 extends from the bottom surface 62b of the second annular body 52 toward the other side in the axial direction. It is formed in a state of being raised beyond the side surface 61.
Further, the outer diameter side fourth bead 74 (second bead) on the one side in the axial direction of the outer diameter side second sliding member 56 is unidirectional in the axial direction from the side surface 56b of the outer diameter side second sliding member 56. It is formed in a state of being raised toward the side.
In the first embodiment, the axial dimension δ56 (δ56=t52-t56) of the outer peripheral surface 52b of the second annular body 52 that is exposed in the radial direction on the one axial side of the outer diameter side second sliding member 56 is , Is set to be larger than the amount of protrusion of the outer diameter side fourth bead 74 in the axial direction. Therefore, even after the welding is completed, a part of the outer peripheral surface 52b of the second annular body 52 is exposed in the radial direction on the axial other direction side from the outer diameter side fourth bead 74, and the outer diameter side fourth bead 74 is exposed. The bead 74 is formed on the other side in the axial direction from the side surface 64. For this reason, the outer diameter side fourth bead 74 does not project to the side surface 64 (which is the inner surface of the pocket 58).

The inner diameter side third bead 75 on the other side in the axial direction of the inner diameter side second sliding member 57 is formed in a state of bulging beyond the side surface 61 from the bottom surface 62b of the second annular body 52 toward the other side in the axial direction. ..
Further, the inner diameter side fourth bead 76 (second bead) on the one side in the axial direction of the inner diameter side second sliding member 57 faces the one side in the axial direction from the side surface 57b of the inner diameter side second sliding member 57. It is formed in a raised state. In the first embodiment, the axial dimension δ57 (δ57=t52-t57) of the inner peripheral surface 52a of the second annular body 52, which is exposed in the radial direction on one axial side of the inner diameter side second sliding member 57, is determined. Is set to be larger than the rising amount of the fourth bead 76 on the inner diameter side in the axial direction. Therefore, even after the welding is completed, a part of the inner peripheral surface 52a of the second annular body 52 is exposed in the radial direction on the axial one direction side of the inner diameter side fourth bead 76, and the inner diameter side fourth bead 76 is exposed. 76 is formed on the side of the side surface 64 in the other axial direction. Therefore, the inner diameter side fourth bead 76 does not project to the side surface 64 (which is the inner surface of the pocket 58).

After that, as shown in FIG. 4A, the outer diameter side is formed so as to be flush with the bottom surface 60b of the first annular body 51 and the side surface 65 of the outer diameter side first sliding member 54 on one axial side. The raised portion of the first bead 69 (a portion of the first bead 69 on the outer diameter side that is raised to the one side in the axial direction from the side surface 65 and the bottom surface 60b) is removed by grinding. Further, the raised portion of the inner diameter side first bead 71 (the inner diameter side first bead 71) is flush with the bottom surface 60b of the first annular body 51 and the side surface 66 on one axial side of the inner diameter side first sliding member 55. A part of 71 that is raised to the one side in the axial direction from the side surface 66 and the bottom surface 60b) is removed by grinding. FIG. 4A shows a state after the outer-diameter-side first bead 69 and the inner-diameter-side first bead 71 are ground so as to be flush with the bottom surface 60b.

Further, as shown in FIG. 5A, the outer diameter side first surface 62b and the outer diameter side second sliding member 56 are arranged so that they are flush with the side surface 67 on the other side in the axial direction of the outer diameter side second sliding member 56. The raised portions on the outer diameter side of the 3 beads 73 (the portions of the outer diameter side third beads 73 raised to the other side in the axial direction from the side surface 67 and the bottom surface 62b) are removed by grinding. In addition, the raised portions (inner diameter) of the inner diameter side third bead 75 other than the inner diameter side such that the bottom surface 62b of the second annular body 52 and the side surface 68 of the inner diameter side second sliding member 57 on the other side in the axial direction are flush with each other. Of the side third beads 75, the side surface 68 and the portion that bulges from the bottom surface 62b to the other side in the axial direction) is removed by grinding. FIG. 5A shows a state after the third bead 73 on the outer diameter side and the third bead 75 on the inner diameter side are ground so as to be flush with the bottom face 62b.

As shown in FIG. 6, the circumferential width W1 of the bottom surface 60b of the recess 60 is the same as or slightly wider than the range L1 in which the outer diameter side first bead 69 and the inner diameter side first bead 71 are formed. .. The raised portion of the outer diameter side first bead 69 and the inner diameter side first bead 71 is removed by grinding. Therefore, the outer diameter side first bead 69 and the inner diameter side first bead 71 are recessed on the other side in the axial direction (the side closer to the pocket 58 in the axial direction) than the side surface 59 of the first annular body 51.
The circumferential width W2 of the bottom surface 62b of the recess 62 is the same as or slightly wider than the range L2 in which the outer diameter side third bead 73 and the inner diameter side third bead 75 are formed. The raised portions of the outer diameter side third bead 73 and the inner diameter side third bead 75 are removed by grinding. Therefore, the outer diameter side third bead 73 and the inner diameter side third bead 75 are recessed to one side in the axial direction (the side closer to the first cylindrical roller 6 in the axial direction) than the side surface 61 of the second annular body 52. There is.

The depth t1 from the side surface 59 of the recess 60 is larger than 0 and smaller than the penetration depth D1 (see FIG. 4B) between the outer diameter side first bead 69 and the inner diameter side first bead 71. I wish I had it. More preferably, the depth t1 is the penetration depth in order to reliably join the outer diameter side first sliding member 54 and the first annular body 51 and the inner diameter side first sliding member 55 and the first annular body 51. It is preferable to set it to one half or less of D1.
The depth t2 from the side surface 61 of the recess 62 is larger than 0 and smaller than the penetration depth D2 (see FIG. 5B) between the outer diameter side third bead 73 and the inner diameter side third bead 75. I wish I had it. More preferably, the depth t2 is the penetration depth in order to reliably join the outer diameter side second sliding member 56 and the second annular body 52 and the inner diameter side second sliding member 57 and the second annular body 52. It is preferable to set it to half or less of D2.

The outer diameter side first bead 69 and the inner diameter side first bead 71 are formed at positions that are recessed toward the other side in the axial direction from the side surface 59 on the one side in the axial direction of the first annular body 51. At the same time, since the outer diameter side first bead 69 remains, the outer diameter side first sliding member 54 and the first annular body 51 can be reliably joined. Further, since the inner diameter side first bead 71 remains, the inner diameter side first sliding member 55 and the first annular body 51 can be reliably joined.
In addition, the outer diameter side third bead 73 and the inner diameter side third bead 75 are formed at a position recessed in one axial direction side from the side surface 61 on the other axial side of the second annular body 52. At the same time, since the outer diameter side third bead 73 remains, the outer diameter side second sliding member 56 and the second annular body 52 can be reliably joined. Moreover, since the inner diameter side third bead 75 remains, the inner diameter side second sliding member 57 and the second annular body 52 can be reliably joined.

Thus, as shown in FIG. 2, in the radial row bearing portion, the plurality of first cylindrical rollers 6 are incorporated between the inner raceway surface 15 of the first inner ring 4a and the outer raceway surface 18 of the first outer ring 5a. The first retainer 9 is rotatably retained at substantially equal intervals in the circumferential direction. In the first cage 9, the first annular body 51 is arranged on one axial side of the first cylindrical roller 6 along the first cylindrical roller 6 coaxially with the central axis m, and the second annular body 52 is It is arranged coaxially with the central axis m along the first cylindrical roller 6 on the other axial side of the first cylindrical roller 6. The column 53 extends in the axial direction from the side surface 63 on the other axial side of the first annular body 51, passing between the first cylindrical rollers 6 adjacent to each other in the circumferential direction, and the second annular ring. It is connected to the side surface 64 on one axial side of the body 52.

When the outer ring 5 rotates, the first cylindrical roller 6 rolls on the inner raceway surface 15 and the outer raceway surface 18, and revolves around the central axis m. At the same time, the pillar 53 of the first cage 9 is biased by the first cylindrical roller 6, and the first cage 9 rotates around the central axis m together with the first cylindrical roller 6. The outer circumference of the outer diameter side first sliding member 54 and the outer circumference of the outer diameter side second sliding member 56 are incorporated so that they can contact the outer raceway surface 18 of the outer ring 5 with a slight clearance. Further, the inner circumference of the inner diameter side first sliding member 55 and the inner circumference of the inner diameter side second sliding member 57 are incorporated so as to be able to contact the inner raceway surface 15 of the inner ring 4 with a slight clearance. Therefore, depending on the state, the first cage 9 is guided by the outer ring 5 or the inner ring 4 and rotates about the central axis m.

At this time, the outer circumference of the outer diameter side first sliding member 54 and the outer circumference of the outer diameter side second sliding member 56 are the outer raceway surface 18 of the outer ring 5 and the inner circumference and inner diameter of the inner diameter side first sliding member 55. The inner periphery of the second side sliding member 57 makes sliding contact with the inner raceway surface 15 of the inner ring 4. In general, when dissimilar metals make sliding contact with each other, defects such as adhesion are less likely to occur on the sliding surfaces thereof as compared with the case where metals of the same type make sliding contact. In the rolling bearing device 1 of the first embodiment, the outer diameter side first sliding member 54, the outer diameter side second sliding member 56, the inner diameter side first sliding member 55, and the inner diameter side second sliding member 57 are Since the outer ring 5 and the inner ring 4 are made of copper alloy and made of steel, when the first cage 9 rotates, the outer circumference of the outer diameter side first sliding member 54 and the outer diameter side second sliding member 56 are The outer circumference is in sliding contact with the outer raceway surface 18 of the outer ring 5, and the inner circumference of the inner diameter side first sliding member 55 and the inner circumference of the inner diameter side second sliding member 57 are in sliding contact with the inner raceway surface 15 of the inner ring 4. Thus, it is possible to prevent problems such as adhesion due to these contacts.

Further, the first cage 9 is guided by the first radially extending surface 25 and the third side surface 32 and rotates in the circumferential direction. The first annular body 51 axially faces the first radially extending surface 25, and the second annular body 52 axially faces the third side surface 32. When the first cage 9 rotates in the circumferential direction, the side surface 59 (see FIG. 4) on the most axial side of the first annular body 51 and the first radially extending surface 25 make sliding contact with each other, and the second annular body The side surface 61 (see FIG. 5) on the othermost side in the axial direction of the body 52 is in sliding contact with the third side surface 32.

The outer diameter side first sliding member 54 and the first annular body 51, and the inner diameter side first sliding member 55 and the first annular body 51 of the first cage 9 of the first embodiment are welded and joined, respectively. The position is on the bottom surface 60b of the recess 60 that is recessed from the side surface 59 of the first annular body 51 to the other side in the axial direction. Further, the positions where the outer diameter side second sliding member 56 and the second annular body 52 of the first cage 9 and the inner diameter side second sliding member 57 and the second annular body 52 are welded and joined, respectively, It is located on the bottom surface 62b of the concave portion 62 that is recessed toward the one side in the axial direction from the side surface 61 of the second annular body 52.
Since the outer diameter side first bead 69 and the inner diameter side first bead 71 of the first annular body 51 are ground so as to be flush with the bottom surface 60b, the outer diameter side first bead 69 and the first radial direction extension. The surface 25 and the inner diameter side first bead 71 and the first radially extending surface 25 do not come into contact with each other. Further, since the outer diameter side third bead 73 and the inner diameter side third bead 75 of the second annular body 52 are ground to be the same plane as the bottom surface 62b, the outer diameter side third bead 73 and the third side surface 32 are formed. , And the inner diameter side third bead 75 and the third side surface 32 do not contact.

Therefore, each outer diameter side first bead 69 and each inner diameter side first bead 71 in the first annular body 51 do not come into contact with the first radial extension surface 25, and each outer side in the second annular body 52. Since the diameter-side third beads 73 and the inner-diameter-side third beads 75 do not contact the third side surface 32, when the first retainer 9 rotates, each outer-diameter-side first bead in the first annular body 51. 69, each inner diameter side first bead 71, each outer diameter side third bead 73 and each inner diameter side third bead 75 on the second annular body 52 can be reliably prevented from being worn or dropped.
Further, since each recess 60 in the first annular body 51 and each recess 62 in the second annular body 52 retain a lubricant such as grease, the first cage 9 and the first radially extending surface 25, The lubrication state with the third side surface 32 can be improved.

As shown in FIG. 4, on the other side in the axial direction of the outer diameter side first sliding member 54, the outer diameter side second bead 70 for joining the first annular body 51 and the outer diameter side first sliding member 54 to each other is provided. It is formed away from the side surface 63 on the other axial side of the first annular body 51 in the one axial direction side, and does not project inside the pocket 58. Therefore, the outer diameter side second bead 70 does not come into contact with the cylindrical roller 21. Thereby, when the first cage 9 rotates, it is possible to reliably prevent the defect that the outer diameter side second bead 70 is worn or comes off.
Further, on the other side in the axial direction of the inner diameter side first sliding member 55, the inner diameter side second bead 72 that joins the first annular body 51 and the inner diameter side first sliding member 55 has the axis of the first annular body 51. It is formed away from the side surface 63 on the other side in the axial direction in one axial direction, and does not project inside the pocket 58. Therefore, the inner diameter side second bead 72 does not come into contact with the cylindrical roller 21. Accordingly, when the first retainer 9 rotates, it is possible to reliably prevent the defect that the inner diameter side second bead 72 is worn or comes off.

As shown in FIG. 5, the outer diameter side fourth bead 74 that joins the second annular body 52 and the outer diameter side second sliding member 56 on the one side in the axial direction has the axial direction one side of the second annular body 52. It is formed away from the side surface 64 on the direction side to the other side in the axial direction. Therefore, the outer diameter side fourth bead 74 does not project to the inside of the pocket 58. Therefore, the outer diameter side fourth bead 74 does not come into contact with the cylindrical roller 21. Thereby, when the first cage 9 rotates, it is possible to surely prevent the defect that the outer diameter side fourth bead 74 is worn or comes off.
In addition, the inner diameter side fourth bead 76 that joins the second annular body 52 and the inner diameter side second sliding member 57 on the other side in the axial direction is provided with a shaft 64 from the side surface 64 on the one axial direction side of the second annular body 52. It is formed apart from the other direction. Therefore, the inner diameter side fourth bead 76 does not protrude to the inside of the pocket 58. Therefore, the inner diameter side fourth bead 76 does not come into contact with the cylindrical roller 21. Accordingly, when the first retainer 9 rotates, it is possible to reliably prevent the inward-side fourth bead 76 from being worn or falling off.

Further, the first cage 9 according to the first embodiment includes the outer diameter side first sliding member 54 made of a copper alloy, the inner diameter side first sliding member 55 made of a copper alloy, and the outer diameter side second sliding member made of a copper alloy. The sliding member 56 and the copper alloy inner diameter side second sliding member 57 are intermittently attached to the outer circumference and the inner circumference of the steel first annular body 51 and the second annular body 52. Therefore, most of the structure of the first cage 9 can be manufactured from a relatively inexpensive steel material, and the amount of expensive copper alloy used can be reduced. Therefore, the first cage 9 can be manufactured at low cost. be able to. Thus, the manufacturing cost of the rolling bearing device 1 can be reduced.
Further, when the first cage 9 rotates, the outer raceway surface 18 of the steel outer ring 5 and the outer diameter side first sliding member 54 made of a copper alloy or the outer diameter side second sliding member 56 made of a copper alloy. Or, since the inner raceway surface 15 of the steel inner ring 4 and the inner diameter side first sliding member 55 made of the copper alloy or the inner diameter side second sliding member 57 made of the copper alloy make a sliding contact, Problems such as adhesion are unlikely to occur on the slip surface.

FIG. 7 is a view of a retainer 109 of another embodiment (second embodiment) as viewed from the outside in the radial direction around the central axis n of the retainer 109 similar to that of FIG. In the second embodiment, the recess 160 is formed on one axial side of the first annular body 151. The recess 160 is defined by a bottom surface 160b and inclined surfaces 160a and 160c on both sides in the circumferential direction. The outer diameter side first sliding member 154 and the inner diameter side first sliding member 155 are defined by a side surface 165 on one axial side of the outer diameter side first sliding member 154 and an axial direction of the inner diameter side first sliding member 155. The outer diameter side first sliding member 154 is on the outer circumference of the first annular body 151, and the inner diameter side first sliding member 155 is the first annular shape with the one side surface 166 being flush with the bottom surface 160b of the recess 160. It is welded to the inner circumference of the body 151.
At this time, the recess 160 is formed such that the axial depth t3 is deeper than the rising height h1 of the outer diameter side first bead 169 and the inner diameter side first bead 171 (t3>h1). The first bead 169 and the inner diameter side first bead 171 are formed so as to be recessed toward the other side in the axial direction from the side surface 159 that is on the most axial side in the first annular body 151.
An outer diameter side second bead 170 and an inner diameter side second bead 172 are formed on the other side in the axial direction of the outer diameter side first sliding member 154 and the inner diameter side first sliding member 155. The outer-diameter-side second bead 170 and the inner-diameter-side second bead 172 are formed apart from the side surface 163 of the first annular body 151 on the other axial side in the one axial direction, and do not project inside the pocket 158. ..

Further, a recess 162 is formed on the other axial side of the second annular body 152. The recess 162 is defined by a bottom surface 162b and inclined surfaces 162a, 162c on both sides in the circumferential direction. The outer diameter side second sliding member 156 and the inner diameter side second sliding member 157 are defined by the side surface 167 on the other axial side of the outer diameter side second sliding member 156 and the axial direction of the inner diameter side second sliding member 157. With the side surface 168 on the other side being flush with the bottom surface 162b of the recess 162, the outer diameter side second sliding member 156 is on the outer circumference of the second annular body 152, and the inner diameter side second sliding member 157 is the second annular shape. It is welded to the inner circumference of the body 152.
At this time, the recess 162 is formed such that the axial depth t4 is deeper than the rising height h2 of the outer diameter side third bead 173 and the inner diameter side third bead 175 (t4>h2). The third bead 173 and the inner diameter side third bead 175 are formed in a state of being recessed in one axial direction side from the side surface 161 which is on the other most axial side of the second annular body 152.
An outer diameter side fourth bead 174 and an inner diameter side fourth bead 176 are formed on one axial side of the outer diameter side second sliding member 156 and the inner diameter side second sliding member 157. The outer diameter side fourth bead 174 and the inner diameter side fourth bead 176 are formed apart from the side surface 164 of the second annular body 152 on the other side in the axial direction toward the other side in the axial direction, and do not project inside the pocket 158. ..

Accordingly, as in the first embodiment, when the cage 109 rotates, the outer diameter side second bead 170, the inner diameter side second bead 172, the outer diameter side fourth bead 174, and the inner diameter side fourth bead 176 are formed. It is possible to reliably prevent problems such as wear and drop of the. At the same time, the cage 109 can be manufactured at low cost while preventing adhesion of the sliding surface with the outer ring 5 or the inner ring 4 and the like.

The embodiments of the present invention have been described above. However, the embodiments described above are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiments, and can be implemented by appropriately modifying the above-described embodiments without departing from the spirit of the invention.

For example, the first cage 9 illustrated above is formed in an annular shape by arranging the first cage segments 9s in the circumferential direction, but may be formed integrally. Further, the annular bodies 51 and 52 are respectively installed on both sides in the axial direction of the first cylindrical roller 6, but they are installed on only one of the annular bodies 51 (or 52) and the first cylindrical body. It may be constituted by a plurality of pillars 53 in which the rollers 6 are arranged at predetermined intervals in the circumferential direction.
Moreover, in the embodiment illustrated above, the outer diameter side first sliding member 54 is attached to the outer circumference of the first annular body 51, and the outer diameter side second sliding member 56 is attached to the outer circumference of the second annular body 52. Has been. The inner diameter side first sliding member 55 is attached to the inner circumference of the first annular body 51, and the inner diameter side second sliding member 57 is attached to the inner circumference of the second annular body 52. However, when the first cage 9 is a unitary ring and rotates about the central axis m, the outer diameter side first sliding member 54 and the outer diameter side second sliding member 56 are outside the outer ring 5, respectively. In the case of being guided either by sliding on the raceway surface 18 or by sliding the inner diameter side first sliding member 55 and the inner diameter side second sliding member 57 respectively on the inner raceway surface 15 of the inner ring 4. Therefore, the outer diameter side first sliding member 54 is attached to the outer circumference of the first annular body 51, and/or the outer diameter side second sliding member 56 is attached to the outer circumference of the second annular body 52. The sliding member may not be attached to the inner circumference of the first annular body 51, and the sliding member may not be attached to the inner circumference of the second annular body 52.
Alternatively, the inner diameter side first sliding member 55 is attached to the inner circumference of the first annular body 51 and/or the inner diameter side second sliding member 57 is attached to the inner circumference of the second annular body 52, while the first annular shape The sliding member may not be attached to the outer periphery of the body 51 and the sliding member may not be attached to the outer periphery of the second annular body 52.
Moreover, in the embodiment illustrated above, the outer diameter side first sliding member 54 is attached to the outer circumference of the first annular body 51, and the outer diameter side second sliding member 56 is attached to the outer circumference of the second annular body 52. Has been. The inner diameter side first sliding member 55 is attached to the inner circumference of the first annular body 51, and the inner diameter side second sliding member 57 is attached to the inner circumference of the second annular body 52. However, the outer diameter side first sliding member 54 is attached to the outer circumference of the first annular body 51, the inner diameter side first sliding member 55 is attached to the inner circumference of the first annular body 51, and the second annular body 52 is attached. The sliding member may not be attached. Alternatively, the outer diameter side second sliding member 56 is attached to the outer periphery of the second annular body 52, and the inner diameter side second sliding member 57 is attached to the inner periphery of the second annular body 52, so that the first annular body 51 is attached. The sliding member may not be attached.
Further, the outer diameter side first sliding member 54 is attached to the outer circumference of the first annular body 51, and the inner diameter side second sliding member 57 is attached to the inner circumference of the second annular body 52 to slide it to other positions. The moving member may not be attached. Alternatively, the outer diameter side second sliding member 56 is attached to the outer circumference of the second annular body 52, and the inner diameter side first sliding member 55 is attached to the inner circumference of the first annular body 51 to slide to other positions. The member does not have to be attached. These modified examples of the first embodiment can be similarly applied to the cage 109 of the second embodiment.

1: rolling bearing device, 2: cutter head, 4: inner ring, 4a: first inner ring, 4b: second inner ring, 5a: first outer ring, 5b: second outer ring, 6: first cylindrical roller, 7: second Cylindrical rollers, 8: Third cylindrical rollers, 9: First cage, 9s: First cage segment, 10: Second cage, 11: Third cage, 51: First annular body, 52: Second cage Annular body, 53: pillar, 54: outer diameter side first sliding member, 55: inner diameter side first sliding member, 56: outer diameter side second sliding member, 57: inner diameter side second sliding member, 58 : Pocket, 59: Side surface of the first annular body on one side in the axial direction, 60: Recess of the first annular body, 60b: Bottom surface of the recess of the first annular body, 61: Side surface of the second annular body on the other side in the axial direction. , 62: concave portion of second annular body, 62b: bottom surface of concave portion of second annular body, 63: side surface of first annular body on other side in axial direction, 64: side surface of second annular body on one side in axial direction, 69 : Outer diameter side first bead, 70: outer diameter side second bead, 71: inner diameter side first bead, 72: inner diameter side second bead, 73: outer diameter side third bead, 74: outer diameter side fourth bead , 75: inner diameter side third bead, 76: inner diameter side fourth bead

Claims (3)

A first bearing ring having an inner raceway surface on the outer periphery,
A second bearing ring which is arranged radially outside the first bearing ring and has an outer raceway surface on the inner circumference;
A plurality of rolling elements provided rotatably between the inner raceway surface and the outer raceway surface,
A rolling bearing device comprising a retainer for holding the rolling element,
The cage is
With the direction of the central axis of the first or second bearing ring as the axial direction,
A first annular body arranged along the rolling element on one axial side of the rolling element,
From a side surface of the first annular body on the other side in the axial direction, a plurality of columns extending to the other side in the axial direction passing between the rolling elements adjacent to each other in the circumferential direction,
At least one of the outer circumference and the inner circumference of the first annular body is welded to the first sliding member intermittently in the circumferential direction, and at least on the other side in the axial direction of the first sliding member, A first bead for joining the first annular body and the first sliding member is formed,
The rolling bearing device according to claim 1, wherein the first bead is formed on one side in the axial direction with respect to a side surface on the other side in the axial direction of the first annular body. The cage further has a second annular body arranged along the rolling element on the other side in the axial direction of the rolling element, and the plurality of columns include one axial side of the second annular body. The rolling bearing device according to claim 1, wherein the rolling bearing device is connected to a side surface of the rolling bearing. A second sliding member is intermittently welded and joined to at least one of the outer circumference and the inner circumference of the second annular body in the circumferential direction, and at least on the one axial side of the second annular body, A second bead is formed to join the two annular bodies and the second sliding member,
The rolling bearing device according to claim 2, wherein the second bead is formed on a side in one axial direction side of the second annular body on the other side in the axial direction.