JP2017223306A - Thrust roller bearing and thrust roller bearing holder - Google Patents

Thrust roller bearing and thrust roller bearing holder Download PDF

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JP2017223306A
JP2017223306A JP2016119850A JP2016119850A JP2017223306A JP 2017223306 A JP2017223306 A JP 2017223306A JP 2016119850 A JP2016119850 A JP 2016119850A JP 2016119850 A JP2016119850 A JP 2016119850A JP 2017223306 A JP2017223306 A JP 2017223306A
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cage
holding
roller bearing
annular portion
rollers
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JP6790481B2 (en
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中島　義仁
Yoshihito Nakajima
義仁 中島
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JTEKT Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a thrust roller bearing capable of suppressing the generation of cracks or minute cracks on a holder, and a thrust bearing holder.SOLUTION: A holder 3 includes an outside holder 4 which has a first outside annular portion 42 formed on the outside of a first holder hole 44 holding a roller 2 and having a cylindrical outer cylinder portion 42b, a first inside annular portion 41 formed in the inside of the first holding hole 44 and having a cylindrical inner cylinder portion 41b, and a plurality of first column portions 43 coupling the first outside annular portion 42 and the first inside annular portion 41; and an inside holder 5 which has a second outside annular portion 52 formed on the outside of a second holding hole 54 holding a roller 2, a second inside annular portion 51 formed in the inside of the second holding hole 54, and a plurality of second column portions 53 coupling the second outside annular portion 52 and the second inside annular portion 51. The second inside annular portion 51 is elastically engaged with an inner cylinder portion 41b, and the second outside annular portion 52 is elastically engaged with the outer cylinder portion 42b.SELECTED DRAWING: Figure 2

Description

本発明は、スラストころ軸受、及びスラストころ軸受用保持器に関する。   The present invention relates to a thrust roller bearing and a retainer for a thrust roller bearing.

従来、対向配置された２つのレースの間に複数のころを転動可能に介在させたスラストころ軸受が知られている。スラストころ軸受は、例えば、車両のトランスミッションにおいて非回転部材と回転部材との間に介挿され、回転軸方向のスラスト力を受けながら回転部材の回転を円滑にするために用いられている。   Conventionally, there is known a thrust roller bearing in which a plurality of rollers are interposed between two opposed races so as to allow rolling. The thrust roller bearing is inserted, for example, between a non-rotating member and a rotating member in a vehicle transmission, and is used to smoothly rotate the rotating member while receiving a thrust force in the direction of the rotating shaft.

スラストころ軸受では、複数のころは、２つのレースの間に配置された保持器に転動可能に保持されている。スラストころ軸受に用いられる保持器として、２枚の板材を組み合わせたもの（以下、二枚保持器という）が知られている（例えば特許文献１参照）。   In the thrust roller bearing, the plurality of rollers are held in a rollable manner in a cage disposed between two races. As a cage used for a thrust roller bearing, a combination of two plate materials (hereinafter referred to as a two-sheet cage) is known (for example, see Patent Document 1).

二枚保持器は、一方の板材である外側保持器と、他方の板材である内側保持器とを組み合わせて構成されている。外側保持器と内側保持器とは、外側保持器内に内側保持器を収容した状態で、外側保持器の外周に加締め加工を施すことで、一体化されている。   The two-piece cage is configured by combining an outer cage, which is one plate material, and an inner cage, which is the other plate material. The outer cage and the inner cage are integrated by caulking the outer circumference of the outer cage while the inner cage is housed in the outer cage.

外側保持器と内側保持器には、複数のころを保持する複数の保持穴がそれぞれ形成されている。保持穴の幅はころの直径よりも小さく形成されており、ころを保持穴の周縁の外側保持器又は内側保持器に係止させることで、ころの保持器からの脱落が抑制されている。   A plurality of holding holes for holding a plurality of rollers are formed in the outer holder and the inner holder, respectively. The width of the holding hole is formed to be smaller than the diameter of the roller, and the roller is prevented from dropping from the cage by engaging the roller with the outer cage or the inner cage at the periphery of the holding hole.

保持穴の幅はころの直径よりも小さいため、保持器を組み立てる際には、内側保持器の保持穴にころを配置した状態で、内側保持器を外側保持器内に収容し、外側保持器と内側保持器とを加締めにより一体化する必要がある。   Since the width of the retaining hole is smaller than the diameter of the roller, when assembling the retainer, the inner retainer is accommodated in the outer retainer with the roller disposed in the retaining hole of the inner retainer, and the outer retainer And the inner cage need to be integrated by caulking.

特開２００８−０７５７５２号公報JP 2008-075752 A

ところで、保持器ところとは、異なる材料からなり、異なる熱処理、異なる仕上げ加工が施される。したがって、保持器ところとを一体化した状態で熱処理を行うことはできない。   By the way, the cage is made of a different material and is subjected to different heat treatments and different finishing processes. Therefore, heat treatment cannot be performed in a state where the cage is integrated.

そのため、従来のスラストころ軸受では、予め熱処理や表面加工等を施した外側保持器と内側保持器とを加締める必要がある。熱処理後の外側保持器及び内側保持器は、表面硬度が高くなるため、加締めの際に材料強度を上回る引張り応力が発生すると、加締め部分に割れや微小クラックが生じてしまう。   Therefore, in the conventional thrust roller bearing, it is necessary to caulk the outer cage and the inner cage that have been previously subjected to heat treatment, surface processing, and the like. Since the outer cage and the inner cage after heat treatment have high surface hardness, if a tensile stress exceeding the material strength is generated during caulking, cracking or microcracking occurs in the caulking portion.

そこで、本発明は、保持器に割れや微小クラックが発生してしまうことを抑制可能なスラストころ軸受、及びスラストころ軸受用保持器を提供することを目的とする。   Then, an object of this invention is to provide the thrust roller bearing which can suppress that a crack and a microcrack generate | occur | produce in a cage, and the cage for thrust roller bearings.

本発明は、上記目的を達成するため、複数のころと、前記複数のころを転動可能に保持する環状の保持器と、を備え、前記保持器は、前記複数のころを保持する複数の第１保持穴の外側に形成された第１外側円環部と、前記第１保持穴の内側に形成された第１内側円環部と、前記第１外側円環部と前記第１内側円環部とを径方向に連結し、前記保持器の軸方向における一方向への前記ころの移動を規制する複数の第１柱部と、を有する第１保持器と、前記複数のころを保持する複数の第２保持穴の外側に形成された第２外側円環部と、前記第２保持穴の内側に形成された第２内側円環部と、前記第２外側円環部と前記第２内側円環部とを径方向に連結し、前記保持器の軸方向における他方向への前記ころの移動を規制する複数の第２柱部と、を有する第２保持器と、を有し、前記第１内側円環部は、円筒状の内筒部を有し、前記第１外側円環部は、前記内筒部と同軸の円筒状の外筒部を有し、前記第２保持器は、その軸方向における一端部が前記内筒部と前記外筒部との間に挿入されており、前記第２内側円環部が前記内筒部に弾性係合されており、前記第２外側円環部が前記外筒部に弾性係合されている、スラストころ軸受を提供する。   In order to achieve the above object, the present invention includes a plurality of rollers and an annular cage that holds the plurality of rollers in a rollable manner, and the cage holds a plurality of rollers that hold the plurality of rollers. A first outer ring portion formed outside the first holding hole; a first inner ring portion formed inside the first holding hole; the first outer ring portion; and the first inner circle. A first retainer having a plurality of first pillar portions that connect the ring portion in a radial direction and restrict movement of the rollers in one direction in the axial direction of the retainer, and retain the plurality of rollers A second outer ring portion formed outside the plurality of second holding holes, a second inner ring portion formed inside the second holding hole, the second outer ring portion, and the second A plurality of second pillar portions that connect the two inner ring portions in the radial direction and restrict movement of the rollers in other directions in the axial direction of the cage; A first retainer having a cylindrical inner tube portion, and the first outer ring portion having a cylindrical outer axis coaxial with the inner tube portion. One end of the second cage in the axial direction is inserted between the inner cylinder part and the outer cylinder part, and the second inner annular part is the inner cylinder part. A thrust roller bearing is provided in which the second outer ring portion is elastically engaged with the outer cylinder portion.

また、本発明は、上記目的を達成するため、複数のころを転動可能に保持する環状のスラストころ軸受用保持器であって 前記複数のころを保持する複数の第１保持穴の外側に形成された第１外側円環部と、前記第１保持穴の内側に形成された第１内側円環部と、前記第１外側円環部と前記第１内側円環部とを径方向に連結し、前記保持器の軸方向における一方向への前記ころの移動を規制する複数の第１柱部と、を有する第１保持器と、前記複数のころを保持する複数の第２保持穴の外側に形成された第２外側円環部と、前記第２保持穴の内側に形成された第２内側円環部と、前記第２外側円環部と前記第２内側円環部とを径方向に連結し、前記保持器の軸方向における他方向への前記ころの移動を規制する複数の第２柱部と、を有する第２保持器と、を有し、前記第１内側円環部は、円筒状の内筒部を有し、前記第１外側円環部は、前記内筒部と同軸の円筒状の外筒部を有し、前記第２保持器は、その軸方向における一端部が前記内筒部と前記外筒部との間に挿入されており、前記第２内側円環部が前記内筒部に弾性係合されており、前記第２外側円環部が前記外筒部に弾性係合されている、スラストころ軸受用保持器を提供する。   In order to achieve the above object, the present invention is an annular thrust roller bearing retainer that holds a plurality of rollers in a rollable manner, outside the plurality of first holding holes that hold the plurality of rollers. The formed first outer ring part, the first inner ring part formed inside the first holding hole, the first outer ring part and the first inner ring part in the radial direction A plurality of first holders that are coupled to each other and restrict the movement of the rollers in one direction in the axial direction of the cage, and a plurality of second holding holes that hold the plurality of rollers. A second outer ring part formed outside the second holding ring, a second inner ring part formed inside the second holding hole, the second outer ring part and the second inner ring part. A plurality of second pillars connected in the radial direction and restricting movement of the roller in the other direction in the axial direction of the cage. A cage, wherein the first inner ring part has a cylindrical inner cylinder part, and the first outer ring part has a cylindrical outer cylinder part coaxial with the inner cylinder part. The second cage has one end in the axial direction inserted between the inner cylinder and the outer cylinder, and the second inner ring is elastically engaged with the inner cylinder. A thrust roller bearing retainer is provided, wherein the second outer ring portion is elastically engaged with the outer cylinder portion.

本発明によれば、保持器に割れや微小クラックが発生してしまうことを抑制可能なスラストころ軸受、及びスラストころ軸受用保持器を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the thrust roller bearing which can suppress that a crack and a microcrack generate | occur | produce in a cage | basket, and the cage for thrust roller bearings can be provided.

本実施の形態に係るスラストころ軸受を示す斜視図である。It is a perspective view which shows the thrust roller bearing which concerns on this Embodiment. 図１のスラストころ軸受の破断面図である。FIG. 2 is a broken sectional view of the thrust roller bearing of FIG. 1. 図１のスラストころ軸受の周方向に垂直な断面を示す断面図である。It is sectional drawing which shows a cross section perpendicular | vertical to the circumferential direction of the thrust roller bearing of FIG. 内側保持器の斜視図である。It is a perspective view of an inner side holder. （ａ），（ｂ）は、保持器の組立手順を説明する説明図である。(A), (b) is explanatory drawing explaining the assembly procedure of a holder | retainer.

［実施の形態］
本発明の実施の形態について、図１乃至図５を参照して説明する。なお、以下に説明する実施の形態は、本発明を実施する上での好適な具体例として示すものであり、技術的に好ましい種々の技術的事項を具体的に例示している部分もあるが、本発明の技術的範囲は、この具体的態様に限定されるものではない。 [Embodiment]
An embodiment of the present invention will be described with reference to FIGS. In addition, although embodiment described below is shown as a suitable specific example in implementing this invention, although there are some parts which have illustrated various technical matters that are technically preferable. The technical scope of the present invention is not limited to this specific embodiment.

（スラストころ軸受１の全体構成）
図１は本実施の形態に係るスラストころ軸受１を示す斜視図であり、図２はその破断面図、図３は周方向に垂直な断面を示す断面図である。 (Overall configuration of thrust roller bearing 1)
FIG. 1 is a perspective view showing a thrust roller bearing 1 according to the present embodiment, FIG. 2 is a broken sectional view thereof, and FIG. 3 is a sectional view showing a section perpendicular to the circumferential direction.

図１〜３に示すように、スラストころ軸受１は、複数の円柱状のころ２と、複数のころ２を転動可能に保持する環状の保持器（スラストころ軸受用保持器）３と、を備えている。また、図示していないが、スラストころ軸受１は、保持器３を挟み込むように対向して配置され、複数のころ２が転動する軌道面を有する２つのレースを有している。   As shown in FIGS. 1 to 3, the thrust roller bearing 1 includes a plurality of cylindrical rollers 2, an annular cage (thrust roller bearing cage) 3 that holds the plurality of rollers 2 in a rollable manner, It has. Although not shown, the thrust roller bearing 1 has two races that are arranged to face each other so as to sandwich the cage 3 and have raceways on which a plurality of rollers 2 roll.

スラストころ軸受１は、例えば車両のトランスミッションに用いられ、軸状の回転部材と、トランスミッションハウジング等の非回転部材との間に介挿され、保持器３に保持された複数のころ２の転動により、軸方向のスラスト力を受けながら回転部材の回転を円滑にするものである。   The thrust roller bearing 1 is used, for example, in a transmission of a vehicle, and is inserted between a shaft-like rotating member and a non-rotating member such as a transmission housing, and a plurality of rollers 2 held by a cage 3 are rolled. Thus, the rotation of the rotating member is made smooth while receiving the axial thrust force.

（保持器３の説明）
保持器３は、外側保持器４と内側保持器５とを組み合わせてなる。なお、外側保持器４は、本発明の第１保持器の一態様であり、内側保持器５は、本発明の第２保持器の一態様である。 (Description of cage 3)
The cage 3 is formed by combining an outer cage 4 and an inner cage 5. The outer cage 4 is an embodiment of the first cage of the present invention, and the inner cage 5 is an embodiment of the second cage of the present invention.

外側保持器４は、複数のころ２を保持する複数の第１保持穴４４の外側に形成された第１外側円環部４２と、第１保持穴４４の内側に形成された第１内側円環部４１と、第１外側円環部４２と第１内側円環部４１とを径方向に連結し、保持器３の軸方向における一方向（図３における上方向）へのころ２の移動を規制する複数の第１柱部４３と、を一体に有している。   The outer cage 4 includes a first outer ring portion 42 formed outside the plurality of first holding holes 44 that hold the plurality of rollers 2, and a first inner circle formed inside the first holding hole 44. The ring portion 41, the first outer ring portion 42, and the first inner ring portion 41 are connected in the radial direction, and the roller 2 moves in one direction in the axial direction of the cage 3 (upward in FIG. 3). And a plurality of first pillar portions 43 that regulate the above.

第１内側円環部４１と第１外側円環部４２とは同心状に形成されて対をなし、第１柱部４３と共に第１保持穴４４を形成する。第１保持穴４４は、外側保持器４の径方向に沿って長辺が延び、外側保持器４を厚さ方向（軸方向）に貫通する長方形状の貫通孔である。外側保持器４には、放射状に配置された複数のころ２を転動可能に保持するように、複数のころ２と同数（本実施の形態では３０個）の複数の第１保持穴４４が放射状に形成されている。第１保持穴４４の短辺方向の幅は、ころ２の直径よりも小さい。   The first inner annular portion 41 and the first outer annular portion 42 are formed concentrically to form a pair, and together with the first pillar portion 43, the first holding hole 44 is formed. The first holding hole 44 is a rectangular through hole having a long side extending along the radial direction of the outer cage 4 and penetrating the outer cage 4 in the thickness direction (axial direction). The outer holder 4 has a plurality of first holding holes 44 of the same number (30 in this embodiment) as the plurality of rollers 2 so as to hold the plurality of radially arranged rollers 2 in a rollable manner. It is formed radially. The width of the first holding hole 44 in the short side direction is smaller than the diameter of the roller 2.

本実施の形態では、第１内側円環部４１は、軸方向に垂直な板状かつ環状の垂直部４１ａと、垂直部４１ａの内周側の端部から軸方向に延出された短円筒状の内筒部４１ｂと、を一体に有する。垂直部４１ａと内筒部４１ｂとの接続部分は丸みを帯びた形状に形成されている。   In the present embodiment, the first inner annular portion 41 includes a plate-like and annular vertical portion 41a that is perpendicular to the axial direction, and a short cylinder that extends in the axial direction from the inner peripheral end of the vertical portion 41a. And a cylindrical inner cylinder portion 41b. A connecting portion between the vertical portion 41a and the inner cylinder portion 41b is formed in a rounded shape.

また、第１外側円環部４２は、軸方向に垂直な板状かつ環状の垂直部４２ａと、垂直部４２ａの外周側の端部から軸方向に延出された短円筒状の外筒部４２ｂと、を一体に有する。垂直部４２ａと外筒部４２ｂとの接続部分は丸みを帯びた形状に形成されている。   The first outer annular portion 42 includes a plate-like and annular vertical portion 42a perpendicular to the axial direction, and a short cylindrical outer cylinder portion extending in the axial direction from the outer peripheral end of the vertical portion 42a. 42b. A connecting portion between the vertical portion 42a and the outer cylinder portion 42b is formed in a rounded shape.

第１内側円環部４１と第１外側円環部４２の垂直部４１ａ，４２ａは、軸方向における同じ位置に同軸状に配置されている。また、内筒部４１ｂと外筒部４２ｂは、垂直部４１ａ，４２ａから軸方向の同じ方向に延出され、垂直部４１ａ，４２ａからの延出長が等しく形成されており、同軸状に配置されている。第１柱部４３は、軸方向に対して垂直に形成されており、第１内側円環部４１と第１外側円環部４２の垂直部４１ａ，４２ａ同士を連結している。   The vertical portions 41a and 42a of the first inner annular portion 41 and the first outer annular portion 42 are coaxially arranged at the same position in the axial direction. Moreover, the inner cylinder part 41b and the outer cylinder part 42b are extended from the vertical parts 41a and 42a in the same direction of an axial direction, the extension length from the vertical parts 41a and 42a is formed equally, and it arranges coaxially. Has been. The first column portion 43 is formed perpendicular to the axial direction, and connects the vertical portions 41 a and 42 a of the first inner annular portion 41 and the first outer annular portion 42.

図４は、内側保持器５の破断面図である。図１〜４に示すように、内側保持器５は、複数のころ２を保持する複数の第２保持穴５４の外側に形成された第２外側円環部５２と、第２保持穴５４の内側に形成された第２内側円環部５１と、第１外側円環部５２と第１内側円環部５１とを径方向に連結し、保持器３の軸方向における他方向（図３における下方向）へのころ２の移動を規制する複数の第２柱部５３と、を一体に有している。   FIG. 4 is a broken sectional view of the inner cage 5. As shown in FIGS. 1 to 4, the inner cage 5 includes a second outer annular portion 52 formed outside the plurality of second holding holes 54 that hold the plurality of rollers 2, and the second holding holes 54. The second inner annular part 51 formed on the inner side, the first outer annular part 52 and the first inner annular part 51 are connected in the radial direction, and the other direction in the axial direction of the cage 3 (in FIG. 3) And a plurality of second pillar portions 53 for restricting the movement of the roller 2 in the downward direction.

第２内側円環部５１と第２外側円環部５２とは同心状に形成されて対をなし、第２柱部５３と共に第２保持穴５４を形成する。第２保持穴５４は、内側保持器５の径方向に沿って長辺が延び、内側保持器５を厚さ方向（軸方向）に貫通する長方形状の貫通孔である。内側保持器５には、放射状に配置された複数のころ２を転動可能に保持するように、複数のころ２と同数（本実施の形態では３０個）の複数の第２保持穴５４が放射状に形成されている。第２保持穴５４の短辺方向の幅は、ころ２の直径よりも小さい。   The second inner annular portion 51 and the second outer annular portion 52 are formed concentrically to form a pair, and together with the second pillar portion 53, form a second holding hole 54. The second holding hole 54 is a rectangular through hole having a long side extending along the radial direction of the inner cage 5 and penetrating the inner cage 5 in the thickness direction (axial direction). The inner holder 5 has a plurality of second holding holes 54 as many as the plurality of rollers 2 (30 in this embodiment) so as to hold the plurality of radially arranged rollers 2 in a rollable manner. It is formed radially. The width of the second holding hole 54 in the short side direction is smaller than the diameter of the roller 2.

本実施の形態では、第２柱部５３は、第２内側円環部５１と第２外側円環部５２の軸方向の端部同士を連結するように設けられている。   In the present embodiment, the second pillar portion 53 is provided so as to connect the end portions in the axial direction of the second inner annular portion 51 and the second outer annular portion 52.

内側保持器５の軸方向における一端部は、内筒部４１ｂと外筒部４２ｂとの間に挿入されており、外側保持器４内に収容されている。内側保持器５は、第２内側円環部５１と第２外側円環部５２の先端部（第２柱部５３を設けた側と反対側の端部）から、外側保持器４内に挿入され収容される。   One end portion of the inner cage 5 in the axial direction is inserted between the inner cylinder portion 41 b and the outer cylinder portion 42 b and is accommodated in the outer cage 4. The inner cage 5 is inserted into the outer cage 4 from the tip ends (the end opposite to the side where the second column portion 53 is provided) of the second inner ring portion 51 and the second outer ring portion 52. Is housed.

（外側保持器４と内側保持器５との係合）
本実施の形態に係るスラストころ軸受１では、第２内側円環部５１が内筒部４１ｂに弾性係合されており、かつ、第２外側円環部５２が外筒部４２ｂに弾性係合されており、これらの弾性係合により、外側保持器４と内側保持器５とが固定されている。 (Engagement between the outer cage 4 and the inner cage 5)
In the thrust roller bearing 1 according to the present embodiment, the second inner annular portion 51 is elastically engaged with the inner cylindrical portion 41b, and the second outer annular portion 52 is elastically engaged with the outer cylindrical portion 42b. The outer cage 4 and the inner cage 5 are fixed by these elastic engagements.

本実施の形態では、外側保持器４は、内筒部４１ｂの内側保持器５挿入側の端部を外周側に湾曲させた内側突出部４１ｃと、外筒部４２ｂの内側保持器５挿入側の端部を内周側に湾曲させた外側突出部４２ｃと、を有している。   In the present embodiment, the outer cage 4 includes an inner projecting portion 41c in which an end portion of the inner cylinder portion 41b on the inner cage 5 insertion side is curved toward the outer peripheral side, and an inner cage 5 insertion side of the outer cylinder portion 42b. And an outer projecting portion 42c that is curved to the inner peripheral side.

また、内側保持器５は、第２内側円環部５１の内周面に周方向に沿って形成され内側突出部４１ｃが係合される内側係合溝５１ａと、第２外側円環部５２の外周面に周方向に沿って形成され外側突出部４２ｃが係合される外側係合溝５２ａと、を有している。   The inner cage 5 includes an inner engagement groove 51a formed along the circumferential direction on the inner peripheral surface of the second inner annular portion 51 and engaged with the inner protrusion 41c, and a second outer annular portion 52. And an outer engaging groove 52a that is formed along the circumferential direction and engages with the outer protrusion 42c.

外側保持器４と内側保持器５とは、内側突出部４１ｃを内側係合溝５１ａに係合させ、かつ、外側突出部４２ｃを外側係合溝５２ａに係合させた状態で、互いに固定されている。内側係合溝５１ａよりも先端側（第２柱部５３と反対側）の第２内側円環部５１、および、外側係合溝５２ａよりも先端側の第２外側円環部５２は、突出部４１ｃ，４２ｃに係止され外側保持器４と内側保持器５の分離を抑制する役割を果たす。   The outer cage 4 and the inner cage 5 are fixed to each other in a state where the inner protrusion 41c is engaged with the inner engagement groove 51a and the outer protrusion 42c is engaged with the outer engagement groove 52a. ing. The second inner annular portion 51 on the distal end side (opposite to the second column portion 53) from the inner engagement groove 51a and the second outer annular portion 52 on the distal end side from the outer engagement groove 52a protrude. It is locked to the parts 41c and 42c and plays a role of suppressing separation of the outer cage 4 and the inner cage 5.

また、本実施の形態では、第２内側円環部５１または第２外側円環部５２の少なくとも一方が、ころ２側に突出する分離抑制用突起５５を有している。本実施の形態では、第２内側円環部５１と第２外側円環部５２の両方に分離抑制用突起５５を形成しているが、いずれか一方を省略してもよい。   Further, in the present embodiment, at least one of the second inner annular portion 51 or the second outer annular portion 52 has the separation suppressing protrusion 55 protruding toward the roller 2 side. In the present embodiment, the separation suppressing protrusions 55 are formed on both the second inner annular portion 51 and the second outer annular portion 52, but either one may be omitted.

分離抑制用突起５５は、ころ２に干渉することで、第２内側円環部５１または第２外側円環部５２のころ２側への動きを規制し、突出部４１ｃ，４２ｃと係合溝５１ａ，５２ａとの係合が解除されてしまうことを抑制するものである。分離抑制用突起５５を有することにより、ころ６は、転動体としての役割と、突出部４１ｃ，４２ｃと係合溝５１ａ，５２ａとの係合が解除されることを抑制し、外側保持器４と内側保持器５とを一体に維持する役割とを兼ねることになる。   The separation suppression protrusion 55 interferes with the roller 2 to restrict the movement of the second inner ring portion 51 or the second outer ring portion 52 toward the roller 2, and the protrusions 41 c and 42 c and the engagement groove This prevents the engagement with 51a and 52a from being released. By having the separation suppressing protrusion 55, the roller 6 suppresses the role as a rolling element and the release of the engagement between the protruding portions 41c and 42c and the engaging grooves 51a and 52a. And the inner cage 5 are maintained together.

分離抑制用突起５５ところ２との間の隙間は、第２内側円環部５１や第２外側円環部５２が弾性変形しても係合が解除されないように、適宜設定するとよい。より具体的には、内筒部４１ｂと外筒部４２ｂ間で分離抑制用突起５５ところ２との間（第２内側円環部５１及び第２外側円環部５２ところ２との間）に形成される隙間の幅は、第２内側円環部５１の内側突出部４１ｃとのかかり代、及び、第２外周円環部５２の外側突出部４２ｃとのかかり代の合計値よりも小さくするとよい。   The gap between the separation suppressing protrusion 55 and 2 may be set as appropriate so that the engagement is not released even if the second inner annular portion 51 or the second outer annular portion 52 is elastically deformed. More specifically, between the inner cylindrical portion 41b and the outer cylindrical portion 42b, between the separation suppressing projections 55 and 2 (between the second inner annular portion 51 and the second outer annular portion 52 and 2). The width of the gap to be formed is smaller than the total value of the allowance with the inner protrusion 41c of the second inner ring portion 51 and the allowance with the outer protrusion 42c of the second outer ring portion 52. Good.

（外側保持器４と内側保持器５の材質）
本実施の形態では、外側保持器４が金属からなり、内側保持器５が樹脂からなる。 (Material of outer cage 4 and inner cage 5)
In the present embodiment, the outer cage 4 is made of metal, and the inner cage 5 is made of resin.

本実施の形態では、外側保持器４は、鋼板をプレス等によって打ち抜き及び屈曲して形成されている。外側保持器４は保持器３の外表面の大部分を占めるため、外側保持器４を金属製とすることにより、保持器３の機械的強度を維持し、耐久性を向上できる。また、外側保持器４を樹脂製とした場合と比較して、外側保持器４が変形しにくくなるので、係止爪６による係止が解除されにくくなり、外側保持器４と内側保持器５との分離を抑制できる。   In the present embodiment, the outer cage 4 is formed by punching and bending a steel plate with a press or the like. Since the outer cage 4 occupies most of the outer surface of the cage 3, the mechanical strength of the cage 3 can be maintained and the durability can be improved by making the outer cage 4 made of metal. In addition, since the outer cage 4 is less likely to be deformed compared to the case where the outer cage 4 is made of resin, the latching by the latching claws 6 is not easily released, and the outer cage 4 and the inner cage 5 are not released. Can be prevented from separating.

また、本実施の形態では、内側保持器５は、射出成形により形成されている。係合溝５１ａ，５２ａはアンダーカットとなるが、射出成形の際には無理抜きにより対応することができる。内側保持器５に用いる樹脂としては、例えば、６６ナイロン、４６ナイロン、ＰＥＥＫ（ポリエーテルエーテルケトン）、ＰＰＳ（ポリフェニレンサルファイド）等が挙げられる。また、ころ２の転動による内側保持器５の摩耗を抑制するために、内側保持器５はガラス繊維（ガラスフィラー）を含むことが望ましい。   Moreover, in this Embodiment, the inner side holder | retainer 5 is formed by injection molding. The engaging grooves 51a and 52a are undercut, but can be handled by forcibly removing them during injection molding. Examples of the resin used for the inner cage 5 include 66 nylon, 46 nylon, PEEK (polyether ether ketone), PPS (polyphenylene sulfide), and the like. Moreover, in order to suppress wear of the inner cage 5 due to rolling of the rollers 2, it is desirable that the inner cage 5 contains glass fibers (glass filler).

内側保持器５を樹脂製とすることで、係合溝５１ａ，５２ａを有する複雑な形状に成型しやすくなる。また、樹脂は金属と比較して変形し易いため、外側保持器４と内側保持器５とを一体化した後に、第２保持穴５４を介してころ２を嵌め込むことが可能になる。その結果、スラストころ軸受け１の組立性を向上できると共に、ころ２により係止爪６の係止の解除を抑制させることも可能になる。   By making the inner cage 5 made of resin, it becomes easy to mold into a complicated shape having the engagement grooves 51a and 52a. Further, since the resin is easily deformed as compared with the metal, the roller 2 can be fitted through the second holding hole 54 after the outer cage 4 and the inner cage 5 are integrated. As a result, the assemblability of the thrust roller bearing 1 can be improved, and the release of the locking claw 6 by the roller 2 can be suppressed.

（保持器３の組立手順）
まず、鋼板を打ち抜き屈曲する等して外側保持器４を形成すると共に、射出成形等により内側保持器５を形成する。外側保持器４の内側突出部４１ｃ及び外側突出部４２ｃは、例えば、プレス加工時に内筒部４１ｂ及び外筒部４２ｂの端部を湾曲させることで形成される。また、外側保持器４を形成する際には、内側突出部４１ｃ及び外側突出部４２ｃを形成した後に、後熱処理や表面加工を行う。内側突出部４１ｃ及び外側突出部４２ｃの形成後に熱処理を行うことで、内側突出部４１ｃ及び外側突出部４２ｃの形成時に割れや微小クラックが発生してしまうことを抑制できる。 (Assembly procedure of cage 3)
First, the outer cage 4 is formed by punching and bending a steel plate and the inner cage 5 is formed by injection molding or the like. The inner protrusion 41c and the outer protrusion 42c of the outer cage 4 are formed by, for example, bending the ends of the inner cylinder part 41b and the outer cylinder part 42b during press working. Further, when the outer cage 4 is formed, after the inner protrusion 41c and the outer protrusion 42c are formed, post heat treatment and surface processing are performed. By performing heat treatment after the formation of the inner protrusion 41c and the outer protrusion 42c, it is possible to suppress the occurrence of cracks and microcracks during the formation of the inner protrusion 41c and the outer protrusion 42c.

その後、外側保持器４内に内側保持器５を挿入して、外側保持器４と内側保持器５とを一体化させる。このとき、図５（ａ）に示すように、第２内側円環部５１の先端部が外周側に、第２外周円環部５２の先端部が内周側に入り込むように内側保持器５が弾性変形し、第２内側円環部５１及び第２外周円環部５２の先端部が外側保持器４内へと挿入される。さらに内側保持器５の挿入を進めると、内側突出部４１ｃを内側係合溝５１ａに係合されると共に、外側突出部４２ｃが外側係合溝５２ａに係合され、外側保持器４と内側保持器５とが一体化される。   Thereafter, the inner cage 5 is inserted into the outer cage 4 so that the outer cage 4 and the inner cage 5 are integrated. At this time, as shown in FIG. 5 (a), the inner cage 5 so that the tip of the second inner ring part 51 enters the outer peripheral side and the tip of the second outer ring part 52 enters the inner peripheral side. Are elastically deformed, and the distal end portions of the second inner ring portion 51 and the second outer ring portion 52 are inserted into the outer cage 4. When the inner cage 5 is further inserted, the inner protrusion 41c is engaged with the inner engagement groove 51a, and the outer protrusion 42c is engaged with the outer engagement groove 52a. The vessel 5 is integrated.

その後、図５（ｂ）に示すように、樹脂からなる内側保持器５の第２保持穴５４から保持器３内にころ２を押し込む。このとき、第２保持穴５４の周縁の第２柱部５３が弾性変形し、ころ２が保持器３内へと押し込まれる。すべての保持穴４４，５４にころ２を押し込むと、図１の状態となり、保持器３の組立が完了する。   Thereafter, as shown in FIG. 5B, the roller 2 is pushed into the cage 3 from the second holding hole 54 of the inner cage 5 made of resin. At this time, the second column part 53 at the periphery of the second holding hole 54 is elastically deformed, and the roller 2 is pushed into the cage 3. When the rollers 2 are pushed into all the holding holes 44 and 54, the state shown in FIG. 1 is obtained, and the assembly of the cage 3 is completed.

（実施の形態の作用及び効果）
以上説明したように、本実施の形態に係るスラストころ軸受１では、第２内側円環部５１が内筒部４１ｂに弾性係合されており、第２外側円環部５２が外筒部４２ｂに弾性係合されている。 (Operation and effect of the embodiment)
As described above, in the thrust roller bearing 1 according to the present embodiment, the second inner ring portion 51 is elastically engaged with the inner cylinder portion 41b, and the second outer ring portion 52 is the outer cylinder portion 42b. Is elastically engaged.

これにより、加締め加工を行うことなく外側保持器４と内側保持器５と一体化させることが可能となるため、加締めによる保持器３の割れや微小クラックの発生を抑制することが可能になる。   Thereby, since it becomes possible to integrate with the outer side holder | retainer 4 and the inner side holder | retainer 5 without performing a caulking process, it becomes possible to suppress generation | occurrence | production of the crack of the holder | retainer 3 by a caulking, and a micro crack. Become.

また、本実施の形態では、外側保持器４が金属からなり、内側保持器５が樹脂からなるため、外側保持器４を変形しにくくして外側保持器４と内側保持器５との分離を抑制でき、かつ、外側保持器４と内側保持器５とを一体化した後にころ２を取り付け可能として、スラストころ軸受け１の組立性を向上できる。   In the present embodiment, since the outer cage 4 is made of metal and the inner cage 5 is made of resin, it is difficult to deform the outer cage 4 and the outer cage 4 and the inner cage 5 are separated. The roller 2 can be attached after the outer cage 4 and the inner cage 5 are integrated, and the assemblability of the thrust roller bearing 1 can be improved.

第２外側円環部５２または第２内側円環部５１の少なくとも一方が、ころ２側に突出する分離抑制用突起５５を有しているため、分離抑制用突起５５ところ２との干渉により係止爪６の係止が解除されてしまうことを抑制可能となり、外側保持器４と内側保持器５とがより分離しにくくなる。   Since at least one of the second outer ring portion 52 or the second inner ring portion 51 has the separation suppression protrusion 55 protruding toward the roller 2 side, the separation suppression protrusion 55 is engaged by interference with the second portion. It is possible to suppress the locking of the pawl 6 from being released, and the outer cage 4 and the inner cage 5 are more difficult to separate.

１…スラストころ軸受、２…ころ、３…保持器（スラストころ軸受用保持器）、４…外側保持器（第１保持器）、４１…第１内側円環部、４１ａ…垂直部、４１ｂ…内筒部、４１ｃ…内側突出部、４２…第１外側円環部、４２ａ…垂直部、４２ｂ…外筒部、４２ｃ…外側突出部、４３…第１柱部、４４…第１保持穴、５…内側保持器（第２保持器）、５１…第２内側円環部、５１ａ…内側係合溝、５２…第２外側円環部、５２ａ…外側係合溝、５３…第２柱部、５４…第２保持穴、５５…分離抑制用突起、６…係止爪、６１…内周側係止爪、６１ａ…軸部、６１ｂ…爪部、６２…外周側係止爪、６２ａ…軸部、６２ｂ…爪部 DESCRIPTION OF SYMBOLS 1 ... Thrust roller bearing, 2 ... Roller, 3 ... Cage (Thrust roller bearing cage), 4 ... Outer cage (1st cage), 41 ... 1st inner ring part, 41a ... Vertical part, 41b ... Inner cylinder part, 41c ... Inner protrusion part, 42 ... First outer ring part, 42a ... Vertical part, 42b ... Outer cylinder part, 42c ... Outer protrusion part, 43 ... First pillar part, 44 ... First holding hole 5 ... Inner cage (second cage), 51 ... Second inner ring portion, 51a ... Inner engagement groove, 52 ... Second outer ring portion, 52a ... Outer engagement groove, 53 ... Second pillar 54, second holding hole, 55, separation suppressing projection, 6 ... locking claw, 61 ... inner peripheral side locking claw, 61a ... shaft portion, 61b ... claw portion, 62 ... outer peripheral side locking claw, 62a ... Shaft part, 62b ... Claw part

Claims (5)

複数のころと、前記複数のころを転動可能に保持する環状の保持器と、を備え、
前記保持器は、
前記複数のころを保持する複数の第１保持穴の外側に形成された第１外側円環部と、前記第１保持穴の内側に形成された第１内側円環部と、前記第１外側円環部と前記第１内側円環部とを径方向に連結し、前記保持器の軸方向における一方向への前記ころの移動を規制する複数の第１柱部と、を有する第１保持器と、
前記複数のころを保持する複数の第２保持穴の外側に形成された第２外側円環部と、前記第２保持穴の内側に形成された第２内側円環部と、前記第２外側円環部と前記第２内側円環部とを径方向に連結し、前記保持器の軸方向における他方向への前記ころの移動を規制する複数の第２柱部と、を有する第２保持器と、を有し、
前記第１内側円環部は、円筒状の内筒部を有し、
前記第１外側円環部は、前記内筒部と同軸の円筒状の外筒部を有し、
前記第２保持器は、その軸方向における一端部が前記内筒部と前記外筒部との間に挿入されており、
前記第２内側円環部が前記内筒部に弾性係合されており、前記第２外側円環部が前記外筒部に弾性係合されている、
スラストころ軸受。 A plurality of rollers, and an annular cage that holds the plurality of rollers in a rollable manner,
The cage is
A first outer ring portion formed outside a plurality of first holding holes for holding the plurality of rollers; a first inner ring portion formed inside the first holding hole; and the first outer portion. A first holding having a plurality of first pillar portions that connect the annular portion and the first inner annular portion in a radial direction and restrict movement of the roller in one direction in the axial direction of the cage. And
A second outer ring portion formed outside the plurality of second holding holes holding the plurality of rollers, a second inner ring portion formed inside the second holding hole, and the second outer portion. A second holding portion having a plurality of second pillar portions that connect the annular portion and the second inner annular portion in a radial direction and restrict movement of the roller in the other direction in the axial direction of the cage; And having
The first inner ring portion has a cylindrical inner tube portion,
The first outer ring portion has a cylindrical outer tube portion coaxial with the inner tube portion,
One end of the second cage in the axial direction is inserted between the inner cylinder part and the outer cylinder part,
The second inner ring part is elastically engaged with the inner cylinder part, and the second outer ring part is elastically engaged with the outer cylinder part,
Thrust roller bearing. 前記第１保持器が金属からなり、
前記第２保持器が樹脂からなる、
請求項１に記載のスラストころ軸受。 The first cage is made of metal;
The second cage is made of resin;
The thrust roller bearing according to claim 1. 前記第２外側円環部または第２内側円環部の少なくとも一方が、前記ころ側に突出する分離抑制用突起を有する、
請求項１または２に記載のスラストころ軸受。 At least one of the second outer ring portion or the second inner ring portion has a separation suppressing protrusion protruding toward the roller side,
The thrust roller bearing according to claim 1 or 2. 前記第１保持器は、前記内筒部の前記第２保持器挿入側の端部を外周側に湾曲させた内側突出部と、前記外筒部の前記第２保持器挿入側の端部を内周側に湾曲させた外側突出部と、を有しており、
前記第２保持器は、前記第２内側円環部の内周面に周方向に沿って形成され前記内側突出部が係合される内側係合溝と、前記第２外側円環部の外周面に周方向に沿って形成され前記外側突出部が係合される外側係合溝と、を有している、
請求項１乃至３の何れか１項に記載のスラストころ軸受。 The first cage includes an inner projecting portion in which an end portion of the inner cylinder portion on the second cage insertion side is curved toward an outer peripheral side, and an end portion of the outer cylinder portion on the second cage insertion side. An outer protrusion that is curved toward the inner periphery,
The second retainer is formed along an inner circumferential surface of the second inner annular portion along the circumferential direction and engages with the inner protrusion, and an outer periphery of the second outer annular portion. An outer engagement groove formed on the surface along the circumferential direction and engaged with the outer protrusion.
The thrust roller bearing according to any one of claims 1 to 3. 複数のころを転動可能に保持する環状のスラストころ軸受用保持器であって、
前記複数のころを保持する複数の第１保持穴の外側に形成された第１外側円環部と、前記第１保持穴の内側に形成された第１内側円環部と、前記第１外側円環部と前記第１内側円環部とを径方向に連結し、前記保持器の軸方向における一方向への前記ころの移動を規制する複数の第１柱部と、を有する第１保持器と、
前記複数のころを保持する複数の第２保持穴の外側に形成された第２外側円環部と、前記第２保持穴の内側に形成された第２内側円環部と、前記第２外側円環部と前記第２内側円環部とを径方向に連結し、前記保持器の軸方向における他方向への前記ころの移動を規制する複数の第２柱部と、を有する第２保持器と、を有し、
前記第１内側円環部は、円筒状の内筒部を有し、
前記第１外側円環部は、前記内筒部と同軸の円筒状の外筒部を有し、
前記第２保持器は、その軸方向における一端部が前記内筒部と前記外筒部との間に挿入されており、
前記第２内側円環部が前記内筒部に弾性係合されており、前記第２外側円環部が前記外筒部に弾性係合されている、
スラストころ軸受用保持器。 An annular thrust roller bearing retainer that holds a plurality of rollers in a rollable manner,
A first outer ring portion formed outside a plurality of first holding holes for holding the plurality of rollers; a first inner ring portion formed inside the first holding hole; and the first outer portion. A first holding having a plurality of first pillar portions that connect the annular portion and the first inner annular portion in a radial direction and restrict movement of the roller in one direction in the axial direction of the cage. And
A second outer ring portion formed outside the plurality of second holding holes holding the plurality of rollers, a second inner ring portion formed inside the second holding hole, and the second outer portion. A second holding portion having a plurality of second pillar portions that connect the annular portion and the second inner annular portion in a radial direction and restrict movement of the roller in the other direction in the axial direction of the cage; And having
The first inner ring portion has a cylindrical inner tube portion,
The first outer ring portion has a cylindrical outer tube portion coaxial with the inner tube portion,
One end of the second cage in the axial direction is inserted between the inner cylinder part and the outer cylinder part,
The second inner ring part is elastically engaged with the inner cylinder part, and the second outer ring part is elastically engaged with the outer cylinder part,
Thrust roller bearing cage.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022110311A1 (en) 2022-04-28 2023-11-02 Schaeffler Technologies AG & Co. KG Axial bearing arrangement with bearing rollers surrounded by a multi-part bearing cage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022110311A1 (en) 2022-04-28 2023-11-02 Schaeffler Technologies AG & Co. KG Axial bearing arrangement with bearing rollers surrounded by a multi-part bearing cage

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