JP2017116024A - Rolling bearing - Google Patents

Rolling bearing Download PDF

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JP2017116024A
JP2017116024A JP2015253710A JP2015253710A JP2017116024A JP 2017116024 A JP2017116024 A JP 2017116024A JP 2015253710 A JP2015253710 A JP 2015253710A JP 2015253710 A JP2015253710 A JP 2015253710A JP 2017116024 A JP2017116024 A JP 2017116024A
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outer ring
cage
inner ring
opposed
axial direction
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JP6759584B2 (en
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谷口 陽三
Yozo Taniguchi
陽三 谷口
岩田 孝
Takashi Iwata
孝 岩田
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JTEKT Corp
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Abstract

PROBLEM TO BE SOLVED: To easily assemble a cage in a rolling bearing in which a part of the cage is opposed to an outer ring at an interval.SOLUTION: A rolling bearing 10 includes an inner ring 11 having an inner ring raceway surface 51 at an outer peripheral side, an outer ring 12 having an outer ring raceway surface 52 and a shoulder portion 55 at an inner peripheral side, a plurality of balls 13 disposed therebetween, and an annular cage 21. The cage 21 has an annular portion 21 at an axial one side, and a plurality of pillar portions 22 extended from the annular portion 21 to the axial other side, and pockets 20 for accommodating the balls 13, are respectively configured between a pair of pillar portions 22, 22 adjacent to each other in the circumferential direction. A radial outer face 40 of the cage 14 has an opposite face 24 opposed to the shoulder portion 55 at an interval, and a retraction face 41 positioned at a radial inner side with respect to the opposite face 24, and preventing interference with a boundary portion 57 between the shoulder portion 55 and the outer ring raceway surface 52, when the pillar portions 22 are elastically deformed to the radial outer side.SELECTED DRAWING: Figure 1

Description

本発明は、転がり軸受に関する。   The present invention relates to a rolling bearing.

各種産業機器には多くの転がり軸受が用いられている。転がり軸受は、内輪、外輪、これら内輪と外輪との間に介在している複数の転動体、及び、これら転動体を保持する保持器を備えている。このような転がり軸受の中でも特に、転動体が玉である玉軸受は回転抵抗が小さい。   Many rolling bearings are used in various industrial equipment. The rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements interposed between the inner ring and the outer ring, and a cage that holds the rolling elements. Among such rolling bearings, in particular, a ball bearing whose rolling elements are balls has a low rotational resistance.

回転抵抗には、軸受内部に存在する潤滑油を保持器が撹拌することで生じる成分(撹拌抵抗)が含まれる。このような撹拌抵抗を低減するためには、軸受外部の潤滑油が軸受内部に浸入し難くするのが好ましく、そのために、内輪及び外輪と保持器との隙間を小さくした玉軸受が提案されている(特許文献1参照)。この玉軸受では、保持器が、軸方向一方側の環状部と、この環状部から軸方向他方側に延びて設けられている複数の柱部とを有する冠型のものであり、環状部の外周面と外輪の肩部との隙間を小さくし、更に、環状部の内周面と内輪の肩部との隙間を小さくしている。   The rotation resistance includes a component (stirring resistance) generated when the cage stirs the lubricating oil present inside the bearing. In order to reduce such agitation resistance, it is preferable that the lubricating oil outside the bearing does not easily enter the inside of the bearing. For this reason, a ball bearing having a small gap between the inner ring and the outer ring and the cage has been proposed. (See Patent Document 1). In this ball bearing, the cage is of a crown type having an annular portion on one axial side and a plurality of column portions provided extending from the annular portion to the other axial side. The clearance between the outer peripheral surface and the shoulder of the outer ring is reduced, and further, the clearance between the inner peripheral surface of the annular portion and the shoulder of the inner ring is reduced.

なお、冠型の保持器は、玉を収容するポケットを周方向に複数有しており、内輪と外輪との間に介在している複数の玉に対して保持器を組み付けるために、ポケットの軸方向他方側は開口している。また、この開口の幅は玉の直径よりも狭くなっており、玉がポケットに一旦収容された状態になると、保持器が玉軸受から脱落するのを防ぐことができる。   In addition, the crown-shaped cage has a plurality of pockets for accommodating balls in the circumferential direction, and in order to assemble the cage to a plurality of balls interposed between the inner ring and the outer ring, The other side in the axial direction is open. Further, the width of the opening is narrower than the diameter of the ball, and the cage can be prevented from falling off the ball bearing once the ball is once accommodated in the pocket.

特開2009−281585号公報JP 2009-281585 A

前記のように、内輪及び外輪と保持器の環状部との隙間を小さくすることで、潤滑油が軸受内部に浸入し難くなり、潤滑油の撹拌抵抗を低減することが可能となる。しかし、このように構成した保持器の場合、内輪と外輪との間に介在している複数の玉に対して組み付ける作業が難しくなる。   As described above, by reducing the gaps between the inner and outer rings and the annular portion of the cage, it becomes difficult for the lubricating oil to enter the inside of the bearing, and the stirring resistance of the lubricating oil can be reduced. However, in the case of the cage configured as described above, it is difficult to assemble the plurality of balls interposed between the inner ring and the outer ring.

すなわち、保持器を組み付ける作業は、次のようにして行われる。先ず、内輪と外輪との間に複数の玉を介在させた状態とする。次に、複数の玉に対して保持器を軸方向から接近させ、更に保持器を軸方向に押して、保持器の各ポケットに玉を一つずつ収容した状態とする。玉をポケットに収容させる際、前記のとおり、ポケットにおける開口の幅は玉の直径よりも狭くなっているため、保持器の柱部は玉に押されて径方向外側に弾性変形する。柱部が径方向外側に弾性変形すると、この柱部の一部が外輪に干渉することがあり、保持器の組み付けが困難となる。なお、玉をポケットに収容させる際、柱部が玉に押されて径方向内側に弾性変形する場合、この柱部の一部は内輪に干渉し、やはり保持器の組み付けが困難となる。   That is, the work of assembling the cage is performed as follows. First, a plurality of balls are interposed between the inner ring and the outer ring. Next, the cage is made to approach the plurality of balls from the axial direction, and the cage is further pushed in the axial direction to place one ball in each pocket of the cage. When the ball is accommodated in the pocket, as described above, since the width of the opening in the pocket is narrower than the diameter of the ball, the pillar portion of the cage is pushed by the ball and elastically deformed radially outward. When the column part is elastically deformed radially outward, a part of the column part may interfere with the outer ring, and it becomes difficult to assemble the cage. When the ball is accommodated in the pocket, if the column portion is pushed by the ball and elastically deforms radially inward, a part of the column portion interferes with the inner ring, and it is difficult to assemble the cage.

そこで、保持器の一部が外輪(内輪)と隙間を有して対向する転がり軸受において、保持器の組み付けが容易となる転がり軸受を提供することを目的とする。   Accordingly, an object of the present invention is to provide a rolling bearing in which a cage is easily assembled in a rolling bearing in which a part of the cage is opposed to the outer ring (inner ring) with a gap.

本発明の転がり軸受は、外周側に内輪軌道面を有している内輪と、内周側に外輪軌道面及び当該外輪軌道面の軸方向一方側に設けられている肩部を有している外輪と、前記内輪と前記外輪との間に設けられている複数の玉と、軸方向一方側の環状部及び当該環状部から軸方向他方側に延びて設けられている複数の柱部を有し周方向で隣り合う前記柱部の間が前記玉を収容するポケットとなる環状の保持器と、を備え、前記保持器の径方向外側面は、前記肩部と隙間を有して対向する対向面と、当該対向面よりも径方向内側に位置し前記柱部が径方向外側に弾性変形した際に前記肩部及び前記外輪軌道面の間の境界部との干渉を防ぐための退避面と、を有している。
この転がり軸受によれば、保持器(前記対向面)が外輪の肩部と隙間を有して対向する構成であり、この保持器を、複数の玉が設けられている内輪と外輪との間に組み付ける際、保持器の柱部が径方向外側に弾性変形するが、前記退避面によって保持器が外輪の前記境界部と干渉するのを防ぐことで、保持器の組み付けが容易となる。
The rolling bearing of the present invention has an inner ring having an inner ring raceway surface on the outer peripheral side, and an outer ring raceway surface on the inner peripheral side and a shoulder provided on one axial side of the outer ring raceway surface. An outer ring, a plurality of balls provided between the inner ring and the outer ring, an annular portion on one axial side, and a plurality of column portions provided to extend from the annular portion to the other axial side. And an annular cage that serves as a pocket for accommodating the ball between the column portions adjacent in the circumferential direction, and the radially outer surface of the cage is opposed to the shoulder portion with a gap. A retraction surface for preventing interference between the facing surface and a boundary portion between the shoulder portion and the outer ring raceway surface when the column portion is elastically deformed radially outward from the facing surface. And have.
According to this rolling bearing, the cage (the facing surface) is configured to face the shoulder portion of the outer ring with a gap, and the cage is disposed between the inner ring and the outer ring provided with a plurality of balls. When assembling the retainer, the pillar portion of the retainer is elastically deformed radially outward. However, the retainer can be easily assembled by preventing the retainer from interfering with the boundary portion of the outer ring.

また、前記保持器は、前記ポケットの軸方向他方側に、当該ポケットよりも狭い間隔で周方向に対向している一対の対向部を有しており、前記柱部は、前記対向部を当該柱部の一部として有していると共に、当該対向部の周方向の変形を阻害する中実部を軸方向他方側に有しているのが好ましい。
この場合、柱部の軸方向他方側は対向部及び中実部を含む中実構造を有する構成となり、保持器(柱部)の軸方向他方側は周方向に変形し難くなる。このため、一旦ポケットに玉が収容されると、玉とポケットとが外れ難くなる。そして、前記のような保持器の構成によれば、保持器(柱部)の軸方向他方側は周方向に変形し難いことから、転がり軸受の組み立てにおいて、玉をポケットに収容させる際、柱部は玉に押されて径方向外側に弾性変形しやすくなる。しかし、前記転がり軸受によれば、柱部が弾性変形しても、前記退避面により保持器が外輪と干渉するのを防ぐことができる。
以上より、保持器の組み付けは容易であると共に、一旦、保持器が組み付けられると、外れにくくなる構成が得られる。
In addition, the cage has a pair of opposed portions facing each other in the circumferential direction at a narrower interval than the pocket on the other side in the axial direction of the pocket, and the column portion includes the opposed portion. While having as a part of pillar part, it is preferable to have the solid part which inhibits the deformation | transformation of the circumferential direction of the said opposing part on the other side of an axial direction.
In this case, the other side in the axial direction of the column part has a solid structure including the opposing part and the solid part, and the other side in the axial direction of the cage (column part) is hardly deformed in the circumferential direction. For this reason, once a ball is received in the pocket, the ball and the pocket are difficult to come off. According to the structure of the cage as described above, the other side in the axial direction of the cage (column part) is not easily deformed in the circumferential direction. Therefore, when assembling the rolling bearing, the ball is accommodated in the pocket. The part is pushed by the ball and is easily elastically deformed radially outward. However, according to the rolling bearing, even if the column portion is elastically deformed, it is possible to prevent the cage from interfering with the outer ring by the retracting surface.
From the above, it is easy to assemble the cage, and once the cage is assembled, a configuration that is difficult to come off can be obtained.

また、前記外輪は、前記外輪軌道面の軸方向他方側に設けられている第二の肩部を更に有し、前記保持器は、前記退避面よりも径方向内側に位置し前記柱部が径方向外側に弾性変形した際に前記第二の肩部及び前記外輪軌道面の間の第二の境界部との干渉を防ぐための第二の退避面を更に有しているのが好ましい。
この場合、保持器の組み付けの際、第二の肩部側においても保持器が外輪に干渉するのを防ぐことができる。
The outer ring further includes a second shoulder provided on the other axial side of the outer ring raceway surface, and the retainer is located radially inward of the retracting surface, and the column portion is It is preferable to further have a second retraction surface for preventing interference with the second boundary portion between the second shoulder portion and the outer ring raceway surface when elastically deforming radially outward.
In this case, when the cage is assembled, it is possible to prevent the cage from interfering with the outer ring also on the second shoulder side.

また、前記環状部の軸方向一方側の側面は、前記外輪側に向かうにしたがって更に軸方向一方側へ向かう傾斜面を有しているのが好ましい。
この場合、軸受が回転することで潤滑油が遠心力によって内輪側から外輪側へ流れるが、この際、その潤滑油は前記傾斜面に沿って流れ、軸受内部に潤滑油が浸入するのを抑制する作用を高めることができる。これにより、軸受内部における潤滑油の撹拌抵抗を低減し、軸受の回転性能を高めることが可能となる。そして、保持器の組み付けの際、環状部の軸方向一方側の側面を押すが、この際、傾斜面を押すと柱部が弾性変形を伴いながら傾いて径方向外側に向きやすい。これにより、保持器の径方向外側面が外輪に干渉しやすくなるが、前記退避面によりその干渉を防ぐことができる。
Moreover, it is preferable that the side surface of the annular part on one side in the axial direction has an inclined surface further toward the one side in the axial direction toward the outer ring side.
In this case, when the bearing rotates, the lubricating oil flows from the inner ring side to the outer ring side due to the centrifugal force. At this time, the lubricating oil flows along the inclined surface and prevents the lubricating oil from entering the bearing. It is possible to enhance the action to do. Thereby, the stirring resistance of the lubricating oil inside the bearing can be reduced, and the rotational performance of the bearing can be improved. When the cage is assembled, the side surface on one side in the axial direction of the annular portion is pushed. At this time, when the inclined surface is pushed, the column portion is inclined while being elastically deformed and tends to be directed radially outward. Thereby, although the radial direction outer side surface of a retainer becomes easy to interfere with an outer ring | wheel, the interference can be prevented by the said evacuation surface.

また、本発明の転がり軸受は、外周側に内輪軌道面及び当該内輪軌道面の軸方向一方側に設けられている肩部を有している内輪と、内周側に外輪軌道面を有している外輪と、前記内輪と前記外輪との間に設けられている複数の玉と、軸方向一方側の環状部及び当該環状部から軸方向他方側に延びて設けられている複数の柱部を有し周方向で隣り合う前記柱部の間が前記玉を収容するポケットとなる環状の保持器と、を備え、前記保持器の径方向内側面は、前記肩部と隙間を有して対向する対向面と、当該対向面よりも径方向外側に位置し前記柱部が径方向内側に弾性変形した際に前記肩部及び前記内輪軌道面の間の境界部との干渉を防ぐための退避面と、を有している。
この転がり軸受によれば、保持器(前記対向面)が内輪の肩部と隙間を有して対向する構成であり、この保持器を、複数の玉が設けられている内輪と外輪との間に組み付ける際、保持器の柱部が径方向内側に弾性変形するが、前記退避面によって保持器が内輪の前記境界部と干渉するのを防ぐことで、保持器の組み付けが容易となる。
The rolling bearing of the present invention has an inner ring raceway surface on the outer peripheral side and an inner ring having a shoulder provided on one axial side of the inner ring raceway surface, and an outer ring raceway surface on the inner peripheral side. An outer ring, a plurality of balls provided between the inner ring and the outer ring, an annular part on one side in the axial direction, and a plurality of column parts provided to extend from the annular part to the other side in the axial direction And an annular cage that serves as a pocket for accommodating the balls between the column portions adjacent to each other in the circumferential direction, and the radially inner side surface of the cage has a gap with the shoulder portion. To prevent interference between the opposing surface and the boundary between the shoulder and the inner raceway surface when the column portion elastically deforms radially inward from the opposing surface. And a retracting surface.
According to this rolling bearing, the cage (the facing surface) is configured to face the shoulder of the inner ring with a gap, and the cage is disposed between the inner ring and the outer ring provided with a plurality of balls. When assembling the cage, the pillar portion of the cage is elastically deformed radially inward, but the cage can be easily assembled by preventing the cage from interfering with the boundary portion of the inner ring.

本発明によれば、複数の玉が設けられている内輪と外輪との間に、保持器を組み付ける際、保持器の柱部が径方向に弾性変形するが、保持器が有する退避面によって外輪(内輪)と干渉するのを防ぐことができ、保持器の組み付けが容易となる。   According to the present invention, when the retainer is assembled between the inner ring and the outer ring provided with a plurality of balls, the pillar portion of the retainer is elastically deformed in the radial direction. Interference with the (inner ring) can be prevented, and the cage can be easily assembled.

本発明の転がり軸受の実施の一形態を示す断面図である。It is sectional drawing which shows one Embodiment of the rolling bearing of this invention. 保持器を示す説明図であり、保持器を半分に切断した状態を示している。It is explanatory drawing which shows a holder | retainer, and has shown the state cut | disconnected in half. 保持器のポケット及びその周囲を示す説明図である。It is explanatory drawing which shows the pocket of a holder | retainer, and its periphery. ポケット及びその周囲を径方向外側から見た図である。It is the figure which looked at the pocket and its circumference from the diameter direction outside. 他の形態の転がり軸受を示す断面図である。It is sectional drawing which shows the rolling bearing of another form.

以下、本発明の実施の形態を図面に基づいて説明する。
図1は、本発明の転がり軸受の実施の一形態を示す断面図である。この転がり軸受10は、内輪11と、外輪12と、これら内輪11と外輪12との間に設けられている複数の玉(転動体)13と、これら玉13を周方向に間隔をあけて保持する環状の保持器14とを備えている。内輪11、外輪12及び玉13は、軸受鋼や炭素鋼からなる。本実施形態の保持器14は樹脂製からなり、金型を用いた射出成形により製造できる。保持器14を樹脂製とすることで、後に説明する退避面41,42等を含む段付き形状を形成するのが容易である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an embodiment of a rolling bearing according to the present invention. The rolling bearing 10 holds an inner ring 11, an outer ring 12, a plurality of balls (rolling elements) 13 provided between the inner ring 11 and the outer ring 12, and these balls 13 at intervals in the circumferential direction. And an annular retainer 14. The inner ring 11, the outer ring 12 and the ball 13 are made of bearing steel or carbon steel. The cage 14 of this embodiment is made of resin and can be manufactured by injection molding using a mold. By making the cage 14 made of resin, it is easy to form a stepped shape including retraction surfaces 41, 42 and the like described later.

図1に示す転がり軸受10は深溝玉軸受である。内輪11は円筒状の部材であり、その外周側に、玉13が転動する凹溝状の内輪軌道面51が設けられている。更に、内輪11には、内輪軌道面51の軸方向一方側に第一の肩部53が設けられており、また、内輪軌道面51の軸方向他方側に第二の肩部54が設けられている。本実施形態では、両肩部53,54の外径は同じである。   The rolling bearing 10 shown in FIG. 1 is a deep groove ball bearing. The inner ring 11 is a cylindrical member, and a concave groove-shaped inner ring raceway surface 51 on which the balls 13 roll is provided on the outer peripheral side thereof. Further, the inner ring 11 is provided with a first shoulder 53 on one side in the axial direction of the inner ring raceway surface 51, and a second shoulder 54 is provided on the other side in the axial direction of the inner ring raceway surface 51. ing. In the present embodiment, the outer diameters of the shoulder portions 53 and 54 are the same.

外輪12は円筒状の部材であり、その内周側に、玉13が転動する凹溝状の外輪軌道面52が設けられている。更に、外輪12には、外輪軌道面52の軸方向一方側に第一の肩部55が設けられており、また、外輪軌道面52の軸方向他方側に第二の肩部56が設けられている。本実施形態では、両肩部55,56の内径は同じである。   The outer ring 12 is a cylindrical member, and a concave groove-shaped outer ring raceway surface 52 on which the balls 13 roll is provided on the inner peripheral side thereof. Further, the outer ring 12 is provided with a first shoulder 55 on one axial side of the outer ring raceway surface 52 and a second shoulder 56 on the other axial side of the outer ring raceway surface 52. ing. In the present embodiment, the inner diameters of the shoulder portions 55 and 56 are the same.

複数の玉13は、内輪11と外輪12との間に形成されている環状空間15に設けられており、転がり軸受10が回転すると(本実施形態では内輪11が回転すると)、これら玉13は保持器14によって保持された状態で内輪軌道面51と外輪軌道面52とを転動する。   The plurality of balls 13 are provided in an annular space 15 formed between the inner ring 11 and the outer ring 12, and when the rolling bearing 10 rotates (in this embodiment, the inner ring 11 rotates), these balls 13 are The inner ring raceway surface 51 and the outer ring raceway surface 52 roll while being held by the cage 14.

図2は、保持器14を示す説明図であり、保持器14を半分に切断した状態を示している。図3は、保持器14のポケット20及びその周囲を示す説明図である。図4は、ポケット20及びその周囲を径方向外側から見た図である。保持器14は、複数の玉13を周方向に沿って所定間隔(等間隔)をあけて保持することができ、このために、保持器14には玉13を保持するポケット20が周方向に沿って複数形成されている。本実施形態の保持器14は、いわゆる冠型保持器であり、玉13の軸方向一方側(図1及び図2では右側)に設けられている環状部21と、この環状部21から軸方向他方側(図1及び図2では左側)に延びて設けられている複数の柱部22とを有している。環状部21の軸方向他方側であって周方向で隣り合う一対の柱部22,22の間の空間が、玉13を収容するポケット20となる。   FIG. 2 is an explanatory view showing the cage 14 and shows a state in which the cage 14 is cut in half. FIG. 3 is an explanatory view showing the pocket 20 of the retainer 14 and its surroundings. FIG. 4 is a view of the pocket 20 and its periphery as viewed from the outside in the radial direction. The cage 14 can hold a plurality of balls 13 at predetermined intervals (equal intervals) in the circumferential direction. For this purpose, the cage 14 has pockets 20 for holding the balls 13 in the circumferential direction. A plurality are formed along. The retainer 14 of the present embodiment is a so-called crown-shaped retainer, and an annular portion 21 provided on one side of the ball 13 in the axial direction (right side in FIGS. 1 and 2), and an axial direction from the annular portion 21. And a plurality of column portions 22 provided to extend to the other side (left side in FIGS. 1 and 2). A space between a pair of column portions 22, 22 adjacent to each other in the circumferential direction on the other side in the axial direction of the annular portion 21 becomes a pocket 20 for accommodating the ball 13.

本実施形態において、軸方向とは、転がり軸受10の中心線C0(図1参照)に平行な方向である。この中心線を軸受中心線C0という。内輪11、外輪12及び保持器14の中心線は、軸受中心線C0と一致する。また、転がり軸受10の径方向を軸受径方向という。図1及び図3において、二点鎖線で示す仮想線C1は、軸受中心線C0に直交しており、この仮想線C1に沿う方向が軸受径方向となる。   In the present embodiment, the axial direction is a direction parallel to the center line C0 (see FIG. 1) of the rolling bearing 10. This center line is referred to as a bearing center line C0. The center lines of the inner ring 11, the outer ring 12 and the retainer 14 coincide with the bearing center line C0. The radial direction of the rolling bearing 10 is referred to as the bearing radial direction. 1 and 3, a virtual line C1 indicated by a two-dot chain line is orthogonal to the bearing center line C0, and a direction along the virtual line C1 is a bearing radial direction.

図2〜図4に示すように、保持器14のポケット20は、仮想の円筒面に沿った形状であるポケット面25を有している。この円筒面は、前記軸受径方向の仮想線C1を中心線とする面である。つまり、ポケット面25を構成している前記円筒面の中心線は仮想線C1と一致している。   As shown in FIGS. 2 to 4, the pocket 20 of the cage 14 has a pocket surface 25 having a shape along a virtual cylindrical surface. This cylindrical surface is a surface having a virtual line C1 in the bearing radial direction as a center line. That is, the center line of the cylindrical surface constituting the pocket surface 25 coincides with the virtual line C1.

図4に示すように、前記円筒面の直径Dは、玉13の直径dよりも僅かに大きい。このため、ポケット面25と玉13との間には隙間が形成され、この隙間により、玉13に対して保持器14は僅かに変位することができる。そして、玉13は球体であることから、円筒面に沿った形状であるポケット面25に点接触することができる。   As shown in FIG. 4, the diameter D of the cylindrical surface is slightly larger than the diameter d of the ball 13. For this reason, a gap is formed between the pocket surface 25 and the ball 13, and the cage 14 can be slightly displaced with respect to the ball 13 by this gap. And since the ball | bowl 13 is a spherical body, it can make point contact to the pocket surface 25 which is a shape along a cylindrical surface.

図3に示すように、環状部21の外周面は、外輪12の肩部55の内周面19と微小隙間を有して対向しており、保持器14が径方向に変位することで、この環状部21の外周面は肩部55の内周面19に接触可能となる。つまり、環状部21の前記外周面は、肩部55の内周面19と隙間を有しており、この内周面19と接触可能な対向面24となる。以上より、本実施形態の保持器14は、外輪12によって径方向の位置決めがされる外輪案内のものである。   As shown in FIG. 3, the outer peripheral surface of the annular portion 21 is opposed to the inner peripheral surface 19 of the shoulder portion 55 of the outer ring 12 with a minute gap, and the cage 14 is displaced in the radial direction, The outer peripheral surface of the annular portion 21 can come into contact with the inner peripheral surface 19 of the shoulder portion 55. That is, the outer peripheral surface of the annular portion 21 has a gap with the inner peripheral surface 19 of the shoulder portion 55, and becomes an opposing surface 24 that can come into contact with the inner peripheral surface 19. As described above, the cage 14 of the present embodiment is an outer ring guide that is positioned in the radial direction by the outer ring 12.

図1及び図3に示すように、環状部21の軸方向一方側の側面は、軸受中心線C0に直交する円環状の面62と、傾斜面61とを有している。傾斜面61は、外輪12側に向かうにしたがって軸方向一方側へ向かう面(テーパ状の面)である。後にも説明するが、転がり軸受10の組み立てにおいて、玉13に対して保持器14を組み付ける際、円環状の面62は、治具等によって押される面となる。また、傾斜面61についても、押される面となる場合がある。   As shown in FIGS. 1 and 3, the side surface on the one axial side of the annular portion 21 has an annular surface 62 orthogonal to the bearing center line C0 and an inclined surface 61. The inclined surface 61 is a surface (tapered surface) that extends toward one side in the axial direction as it goes toward the outer ring 12 side. As will be described later, in assembling the rolling bearing 10, when the cage 14 is assembled to the ball 13, the annular surface 62 becomes a surface pressed by a jig or the like. In addition, the inclined surface 61 may be a pressed surface.

図4において、保持器14は、ポケット20の軸方向他方側に、一対の対向部31,32を有している。一対の対向部31,32は、前記円筒面に沿った形状であるポケット面25の直径Dよりも小さい間隔Wをあけて周方向に対向している。周方向一方側の対向部31は、周方向他方側に臨むストレート面33を有しており、また、周方向他方側の対向部32は、周方向一方側に臨むストレート面34を有している。一方側のストレート面33と他方側のストレート面34とは平行であり、両者は間隔Wをあけて対向している。周方向で隣り合う柱部22,22の先部側(軸方向他方側)において、周方向の間隔はストレート面33,34の間で最も小さく(狭く)なっている。このように、ポケット20は軸方向他方側において開口しており、このポケット20における開口の幅(W)は玉13の直径dよりも狭くなっている。以上より、本実施形態の保持器14では、一対の対向部31,32それぞれは、互いに平行となるストレート面33,34を有している構成となる。   In FIG. 4, the retainer 14 has a pair of opposed portions 31 and 32 on the other axial side of the pocket 20. The pair of facing portions 31 and 32 are opposed to each other in the circumferential direction with an interval W smaller than the diameter D of the pocket surface 25 having a shape along the cylindrical surface. The facing portion 31 on one side in the circumferential direction has a straight surface 33 facing the other side in the circumferential direction, and the facing portion 32 on the other side in the circumferential direction has a straight surface 34 facing the one side in the circumferential direction. Yes. The straight surface 33 on one side and the straight surface 34 on the other side are parallel to each other and are opposed to each other with a gap W therebetween. On the front side (the other side in the axial direction) of the column portions 22 and 22 adjacent in the circumferential direction, the circumferential interval is the smallest (narrow) between the straight surfaces 33 and 34. Thus, the pocket 20 is open on the other side in the axial direction, and the width (W) of the opening in the pocket 20 is narrower than the diameter d of the ball 13. As mentioned above, in the holder | retainer 14 of this embodiment, a pair of opposing parts 31 and 32 become the structure which has the straight surfaces 33 and 34 which are mutually parallel.

ここで、転がり軸受10(図1参照)において保持器14を組み付ける作業について説明する。その作業は次のようにして行われる。先ず、内輪11と外輪12との間に複数の玉13を介在させた状態とする。次に、複数の玉13に対して保持器14を軸方向一方側から接近させ、保持器14の環状部21を軸方向一方側から他方側に向かって押し、保持器14の各ポケット20に玉13を一つずつ収容した状態とする。   Here, an operation of assembling the cage 14 in the rolling bearing 10 (see FIG. 1) will be described. The work is performed as follows. First, a plurality of balls 13 are interposed between the inner ring 11 and the outer ring 12. Next, the cage 14 is made to approach the plurality of balls 13 from one side in the axial direction, the annular portion 21 of the cage 14 is pushed from one side in the axial direction toward the other side, and each pocket 20 of the cage 14 is placed. The balls 13 are accommodated one by one.

このようにポケット20に玉13を収容させる際、前記のとおり、ポケット20における開口の幅(W:図3参照)は玉13の直径dよりも狭くなっているため、保持器14の柱部22は玉13に押されて径方向外側に弾性変形する。   As described above, when the ball 13 is accommodated in the pocket 20 as described above, the width of the opening in the pocket 20 (W: see FIG. 3) is narrower than the diameter d of the ball 13. 22 is pushed by the ball 13 and elastically deforms radially outward.

図3により、保持器14の径方向外側面40の形状について更に説明する。この径方向外側面40は、前記対向面24を有している他に、第一退避面41を有している。本実施形態では、更に、軸方向他方側(柱部22の先部側)に第二退避面42を有しており、また、第一退避面41と第二退避面42とを繋いでいる中間面43を有している。   The shape of the radially outer side surface 40 of the cage 14 will be further described with reference to FIG. The radially outer surface 40 has a first retraction surface 41 in addition to the facing surface 24. In the present embodiment, the second retraction surface 42 is further provided on the other axial side (the front side of the column portion 22), and the first retraction surface 41 and the second retraction surface 42 are connected. An intermediate surface 43 is provided.

対向面24は、前記のとおり、環状部21の外周面であり、軸受中心線C0を中心とする円筒面からなる。
第一退避面41は、対向面24と連続する面であり、軸方向他方側に向かうにしたがって径方向内側に向かう傾斜面からなる。第一退避面41は、対向面24よりも径方向内側に位置している。第一退避面41は、肩部55の内周面19と外輪軌道面52との間の第一の境界部57と対向する位置に設けられている。第一退避面41は、柱部22が径方向外側に変形しても、第一の境界部57と対向して、この境界部57と非接触となる。
中間面43は、第一退避面41と連続する面であり、軸受中心線C0(図1参照)を中心とする円筒面に沿った面からなる。中間面43は、対向面24よりも径方向内側に位置している。中間面43は、外輪軌道面52と対向する位置に設けられている。
第二退避面42は、中間面43と連続する面であり、軸方向他方側に向かうにしたがって径方向内側に向かう傾斜面からなる。第二退避面42は、第一退避面41及び中間面43よりも径方向内側に位置している。第二退避面42は、柱部22が径方向外側に変形しても、肩部56の内周面18と外輪軌道面52との間の第二の境界部58と対向して、この境界部58と非接触となる位置に設けられている。
As described above, the facing surface 24 is the outer peripheral surface of the annular portion 21 and is formed of a cylindrical surface centered on the bearing center line C0.
The first evacuation surface 41 is a surface that is continuous with the facing surface 24 and includes an inclined surface that is directed radially inward toward the other side in the axial direction. The first retracting surface 41 is located on the radially inner side with respect to the facing surface 24. The first retraction surface 41 is provided at a position facing the first boundary portion 57 between the inner peripheral surface 19 of the shoulder portion 55 and the outer ring raceway surface 52. Even if the pillar portion 22 is deformed radially outward, the first retreat surface 41 faces the first boundary portion 57 and is not in contact with the boundary portion 57.
The intermediate surface 43 is a surface that is continuous with the first retracting surface 41 and is a surface along a cylindrical surface centered on the bearing center line C0 (see FIG. 1). The intermediate surface 43 is located on the radially inner side with respect to the facing surface 24. The intermediate surface 43 is provided at a position facing the outer ring raceway surface 52.
The second evacuation surface 42 is a surface that is continuous with the intermediate surface 43 and includes an inclined surface that is directed radially inward toward the other side in the axial direction. The second retracting surface 42 is located on the radially inner side than the first retracting surface 41 and the intermediate surface 43. Even if the column portion 22 is deformed radially outward, the second retraction surface 42 faces the second boundary portion 58 between the inner peripheral surface 18 of the shoulder portion 56 and the outer ring raceway surface 52, and this boundary It is provided at a position that is not in contact with the portion 58.

本実施形態では、第一退避面41、中間面43及び第二退避面42それぞれは、柱部22の径方向外側の面の一部からなる。以上のように、保持器14の径方向外側面40は、軸方向一方側から他方側に向かって、段階的に径方向寸法が小さくなる段付き形状を有している。   In the present embodiment, each of the first retracting surface 41, the intermediate surface 43, and the second retracting surface 42 is a part of the radially outer surface of the column portion 22. As described above, the radially outer surface 40 of the retainer 14 has a stepped shape in which the radial dimension gradually decreases from one axial side to the other side.

また、保持器14は、前記のとおり(図4参照)、ポケット20の軸方向他方側に、一対の対向部31,32を有しており、これら対向部31,32は、ポケット20よりも狭い間隔W(ポケット20の直径Dよりも小さい間隔W)で周方向に対向している。そして、図2に示すように、各柱部22は、二つの対向部31,32をこの柱部22の一部として有している。更に、各柱部22は、軸方向他方側に中実部37を有しており、中実部37は、この柱部22に含まれる二つの対向部31,32の周方向の変形(柱部22を周方向に圧縮する方向の変形)を阻害する機能を有している。中実部37は、一対の対向部31,32の間の部分であり、これら中実部37及び一対の対向部31,32は柱部22の一部として一体となって形成されている。   Further, as described above (see FIG. 4), the retainer 14 has a pair of facing portions 31 and 32 on the other side in the axial direction of the pocket 20, and these facing portions 31 and 32 are more than the pocket 20. Opposing in the circumferential direction with a narrow interval W (interval W smaller than the diameter D of the pocket 20). As shown in FIG. 2, each column portion 22 has two opposing portions 31 and 32 as a part of the column portion 22. Further, each column portion 22 has a solid portion 37 on the other side in the axial direction, and the solid portion 37 is deformed in the circumferential direction of the two opposing portions 31 and 32 included in the column portion 22 (columns). It has a function of hindering deformation in the direction in which the portion 22 is compressed in the circumferential direction. The solid portion 37 is a portion between the pair of facing portions 31 and 32, and the solid portion 37 and the pair of facing portions 31 and 32 are integrally formed as a part of the column portion 22.

この構成によれば、各柱部22の軸方向他方側は、対向部31,32及び中実部37を含む中実構造を有する構成となる。このため、保持器14(柱部22)の軸方向他方側は周方向に圧縮変形し難くなり、一旦ポケット20に玉13が収容されると、玉13とポケット20とが外れ難くなる。
また、前記のような保持器14の構成によれば、保持器14(柱部22)の軸方向他方側は周方向に圧縮変形し難いことから、転がり軸受10の組み立てにおいて、玉13をポケット20に収容させる際、柱部22は玉13に押されて径方向外側に弾性変形しやすくなる。
According to this configuration, the other axial side of each column portion 22 has a solid structure including the opposed portions 31 and 32 and the solid portion 37. For this reason, the other side in the axial direction of the cage 14 (column 22) is not easily compressed and deformed in the circumferential direction, and once the ball 13 is accommodated in the pocket 20, the ball 13 and the pocket 20 are difficult to come off.
Further, according to the structure of the cage 14 as described above, the other side in the axial direction of the cage 14 (column portion 22) is difficult to compress and deform in the circumferential direction. When accommodated in 20, the column portion 22 is pushed by the balls 13 and is easily elastically deformed radially outward.

図1及び図3に示すように、外輪案内の保持器14の場合、柱部22が径方向外側に弾性変形すると、保持器14の一部が外輪12と干渉しやすい。そこで、本実施形態の転がり軸受10では、このような干渉を防ぐための構成として、保持器14の径方向外側面40は、前記第一退避面41を備えている。   As shown in FIGS. 1 and 3, in the case of the outer ring guide retainer 14, when the column portion 22 is elastically deformed radially outward, a part of the retainer 14 easily interferes with the outer ring 12. Therefore, in the rolling bearing 10 of the present embodiment, the radially outer surface 40 of the cage 14 includes the first retraction surface 41 as a configuration for preventing such interference.

すなわち、保持器14の径方向外側面40は、肩部55の内周面19と隙間を有して対向する対向面24を有している他に、この対向面24よりも径方向内側に位置している第一退避面41を有している。第一退避面41は、対向面24よりも径方向内側に位置する面となっているため、保持器14の径方向外側面40の一部と、前記第一の境界部57との間隔を、肩部55の内周面19と対向面24との間隔よりも、大きくすることができる。このため、転がり軸受10の組み立てにおいて、柱部22が径方向外側に弾性変形した際に、保持器14が前記第一の境界部57に干渉するのを防ぐことができる。   That is, the radially outer surface 40 of the retainer 14 has a facing surface 24 that faces the inner peripheral surface 19 of the shoulder portion 55 with a gap, and is further radially inward than the facing surface 24. The first retracting surface 41 is located. Since the first retracting surface 41 is a surface located radially inward of the opposing surface 24, a gap between a part of the radially outer surface 40 of the cage 14 and the first boundary portion 57 is set. The distance between the inner peripheral surface 19 of the shoulder portion 55 and the opposing surface 24 can be made larger. For this reason, in the assembly of the rolling bearing 10, it is possible to prevent the cage 14 from interfering with the first boundary portion 57 when the column portion 22 is elastically deformed radially outward.

これにより、保持器14を、複数の玉13が設けられている内輪11と外輪12との間に組み付ける際、柱部22が径方向外側に弾性変形するが、第一退避面41によって保持器14が外輪12の前記境界部57と干渉するのを防ぐことで、保持器14の組み付けが容易となる。   As a result, when the retainer 14 is assembled between the inner ring 11 and the outer ring 12 provided with the plurality of balls 13, the column portion 22 is elastically deformed radially outward. By preventing 14 from interfering with the boundary portion 57 of the outer ring 12, the retainer 14 can be easily assembled.

また、本実施形態では、図4に示すように、対向する一対の対向部31,32は、ストレート面33,34の軸方向他方側において、更に、軸方向他方側に向かうにしたがって相互の間隔が広くなる傾斜面35,36を有している。保持器14を玉13に組み付ける際、この傾斜面35,36により保持器14がガイドされ、保持器14(ポケット20)を玉13に組み込みやすくしている。   In the present embodiment, as shown in FIG. 4, the pair of facing portions 31 and 32 facing each other are spaced apart from each other on the other axial side of the straight surfaces 33 and 34 toward the other axial side. Has inclined surfaces 35 and 36 which become wider. When the cage 14 is assembled to the ball 13, the cage 14 is guided by the inclined surfaces 35 and 36, so that the cage 14 (pocket 20) can be easily incorporated into the ball 13.

図1及び図3に示すように、保持器14の柱部22の軸方向他方側の先端は、前記第二の境界部58よりも、更に軸方向他方側に位置している。そして、保持器14は、第一退避面41及び中間面43よりも径方向内側に位置している第二退避面42を更に有している。この第二退避面42によれば、転がり軸受10の組み立てにおいて、柱部22が径方向外側に弾性変形した際に、保持器14が軸方向他方側の先部において第二の境界部58と干渉するのを防ぐことができる。このように、保持器14の組み付けの際、第二の肩部56側においても保持器14が外輪12に干渉するのを防ぐことで、保持器14の組み付けが容易となる。   As shown in FIGS. 1 and 3, the tip on the other axial side of the pillar portion 22 of the retainer 14 is located further on the other axial side than the second boundary portion 58. The retainer 14 further includes a second retracting surface 42 that is located radially inward of the first retracting surface 41 and the intermediate surface 43. According to the second retraction surface 42, when the column portion 22 is elastically deformed radially outward in the assembly of the rolling bearing 10, the cage 14 is connected to the second boundary portion 58 at the tip portion on the other side in the axial direction. Interference can be prevented. Thus, when the retainer 14 is assembled, the retainer 14 can be easily assembled by preventing the retainer 14 from interfering with the outer ring 12 also on the second shoulder portion 56 side.

また、前記のとおり、柱部22それぞれは、各柱部22が有している対向部31,32の周方向の変形(柱部22を周方向に圧縮する方向の変形)を阻害する中実部37を軸方向他方側に有しており、一旦、保持器14が転がり軸受10に組み付けられると、玉13とポケット20とが外れ難くなる。
以上より、前記第一退避面41(及び前記第二退避面42)によって保持器14の組み付けは容易であると共に、一旦、保持器14が組み付けられると、外れにくくなる構成が得られる。
Moreover, as above-mentioned, each pillar part 22 is the solid which inhibits the deformation | transformation of the circumferential direction (deformation of the direction which compresses the pillar part 22 to the circumferential direction) of the opposing parts 31 and 32 which each pillar part 22 has. The part 37 is provided on the other side in the axial direction, and once the retainer 14 is assembled to the rolling bearing 10, the balls 13 and the pockets 20 are difficult to come off.
As described above, it is easy to assemble the cage 14 by the first evacuation surface 41 (and the second evacuation surface 42), and once the cage 14 is assembled, a configuration that is difficult to come off is obtained.

本実施形態では(図3参照)、保持器14の環状部21と外輪12の肩部55との隙間を小さくしていることで、軸方向一方側から軸受内部に潤滑油が浸入するのを抑制している。更に、環状部21の軸方向一方側において、傾斜面61は、外輪12側に向かうにしたがって軸方向一方側へ向かう面となっている。このため、転がり軸受10(内輪11)が回転することで潤滑油が遠心力によって内輪11側から外輪12側へ流れるが、この際、その潤滑油は傾斜面61に沿って流れ、環状部21と肩部55との隙間から軸方向一方側に遠のく速度成分を有することができ、軸受内部に潤滑油が浸入するのを抑制する作用を高めることができる。これにより、軸受内部における潤滑油の撹拌抵抗を低減し、転がり軸受10の回転性能を高めることが可能となる。   In the present embodiment (see FIG. 3), the clearance between the annular portion 21 of the retainer 14 and the shoulder portion 55 of the outer ring 12 is reduced so that the lubricating oil enters the bearing from one side in the axial direction. Suppressed. Further, on one side in the axial direction of the annular portion 21, the inclined surface 61 is a surface toward the one side in the axial direction as it goes toward the outer ring 12 side. For this reason, as the rolling bearing 10 (inner ring 11) rotates, the lubricating oil flows from the inner ring 11 side to the outer ring 12 side by centrifugal force. At this time, the lubricating oil flows along the inclined surface 61, and the annular portion 21 It is possible to have a speed component far from the gap between the shoulder portion 55 and the shoulder portion 55 on one side in the axial direction, and to enhance the effect of suppressing the intrusion of the lubricating oil into the bearing. Thereby, the stirring resistance of the lubricating oil inside the bearing can be reduced, and the rotational performance of the rolling bearing 10 can be improved.

転がり軸受10の組み立てのために、保持器14のポケット20に玉13を収容させる際、環状部21が治具等によって軸方向他方側に向かって押される。特に、環状部21が有する軸方向一方側の円環状の面62が押される面となるが、傾斜面61も押される場合がある。傾斜面61が軸方向他方側に向けて押されると、柱部22は弾性変形を伴いながら傾いて径方向外側に向きやすい。これにより、保持器14の径方向外側面40が外輪12に干渉しやすくなるが、前記実施形態によれば、第一退避面41(及び第二退避面42)によりその干渉を防ぐことができる。   When the ball 13 is received in the pocket 20 of the cage 14 for assembling the rolling bearing 10, the annular portion 21 is pushed toward the other side in the axial direction by a jig or the like. In particular, the annular surface 62 on one side in the axial direction of the annular portion 21 is a surface to be pressed, but the inclined surface 61 may also be pressed. When the inclined surface 61 is pushed toward the other side in the axial direction, the column portion 22 is inclined while being elastically deformed and tends to be directed radially outward. Thereby, although the radial direction outer side surface 40 of the holder | retainer 14 becomes easy to interfere with the outer ring | wheel 12, according to the said embodiment, the interference can be prevented with the 1st evacuation surface 41 (and 2nd evacuation surface 42). .

前記実施形態では、保持器14の径方向外側面40が、第一退避面41の他に、第二退避面42も有している場合について説明したが、例えば、保持器14の柱部22の軸方向他方側の先端が、前記第二の境界部58よりも軸方向一方側に位置している場合、その保持器14は、軸方向他方側において外輪12と干渉するおそれがない。この場合、第二退避面42を省略することができる。   In the above-described embodiment, the case where the radially outer side surface 40 of the cage 14 has the second withdrawal surface 42 in addition to the first withdrawal surface 41 has been described. When the tip on the other side in the axial direction is positioned on the one side in the axial direction with respect to the second boundary portion 58, the cage 14 does not possibly interfere with the outer ring 12 on the other side in the axial direction. In this case, the second retracting surface 42 can be omitted.

図5は、他の形態の転がり軸受を示す断面図である。前記実施形態(図1)では、保持器14を、内輪11及び外輪12の間に介在している複数の玉13に組み付ける際、保持器14の柱部22は径方向外側に弾性変形する場合を説明している。これに対して、図5に示す転がり軸受10は、柱部22が径方向内側に弾性変形する場合の軸受である。
図5に示す転がり軸受10と、図1に示す転がり軸受10とでは、内輪11、外輪12、及び玉13の構成は同じであり、保持器84の構成が異なる。
FIG. 5 is a cross-sectional view showing another form of rolling bearing. In the embodiment (FIG. 1), when the retainer 14 is assembled to the plurality of balls 13 interposed between the inner ring 11 and the outer ring 12, the column portion 22 of the retainer 14 is elastically deformed radially outward. Is explained. On the other hand, the rolling bearing 10 shown in FIG. 5 is a bearing when the column portion 22 is elastically deformed radially inward.
In the rolling bearing 10 shown in FIG. 5 and the rolling bearing 10 shown in FIG. 1, the configurations of the inner ring 11, the outer ring 12, and the balls 13 are the same, and the configuration of the cage 84 is different.

図5に示す形態では、保持器84は、環状の部材であり、軸方向一方側の環状部71と、この環状部71から軸方向他方側に延びて設けられている複数の柱部72とを有している。周方向で隣り合う柱部72,72の間が玉13を収容するポケット70となる。保持器84の径方向内側面79は、内輪11の肩部53の外周面60と隙間を有して対向している対向面80と、この対向面80よりも径方向外側に位置している(第一の)退避面81とを有している。この退避面81は、保持器84の組み付けのために柱部72が径方向内側に弾性変形した際、肩部53の外周面60及び内輪軌道面51の間の境界部59との干渉を防ぐ。   In the form shown in FIG. 5, the cage 84 is an annular member, and includes an annular portion 71 on one axial side, and a plurality of column portions 72 provided extending from the annular portion 71 to the other axial side. have. A pocket 70 for accommodating the balls 13 is formed between the column portions 72 and 72 adjacent in the circumferential direction. The radially inner side surface 79 of the cage 84 is located on the radially outer side of the opposed surface 80 facing the outer peripheral surface 60 of the shoulder 53 of the inner ring 11 with a gap. (First) retraction surface 81. The retracting surface 81 prevents interference with the boundary portion 59 between the outer peripheral surface 60 of the shoulder portion 53 and the inner ring raceway surface 51 when the column portion 72 is elastically deformed radially inward for the assembly of the cage 84. .

図5に示す形態においても、保持器84は、軸方向他方側に、第二の退避面82を有している。また、図5に示す保持器84は、図1に示す保持器14の外周側と内周側とを反対にした形状であり、図1に示す保持器14が有している構成を、図5に示す保持器84に(反対にして)適用することができる。   Also in the form shown in FIG. 5, the retainer 84 has a second retracting surface 82 on the other axial side. Further, the retainer 84 shown in FIG. 5 has a shape in which the outer peripheral side and the inner peripheral side of the retainer 14 shown in FIG. 1 are reversed, and the configuration of the retainer 14 shown in FIG. It can be applied to the cage 84 shown in FIG.

図5に示す転がり軸受10によれば、保持器84(対向面80)が内輪11の肩部53と隙間を有して対向する構成であり、この保持器84を、複数の玉13が設けられている内輪11と外輪12との間に組み付ける際、保持器84の柱部72が径方向内側に弾性変形するが、退避面81によって保持器84が内輪11の前記境界部59と干渉するのを防ぐことで、保持器の組み付けが容易となる。   According to the rolling bearing 10 shown in FIG. 5, the cage 84 (opposing surface 80) is configured to face the shoulder 53 of the inner ring 11 with a gap, and the cage 84 is provided with a plurality of balls 13. When assembled between the inner ring 11 and the outer ring 12, the column portion 72 of the retainer 84 is elastically deformed radially inward, but the retainer 84 interferes with the boundary portion 59 of the inner ring 11 by the retraction surface 81. By preventing this, the cage can be easily assembled.

以上のとおり開示した実施形態はすべての点で例示であって制限的なものではない。つまり、本発明の転がり軸受は、図示する形態に限らず本発明の範囲内において他の形態のものであってもよい。   The embodiments disclosed above are illustrative in all respects and not restrictive. That is, the rolling bearing of the present invention is not limited to the illustrated form, but may be of another form within the scope of the present invention.

10:転がり軸受 11:内輪 12:外輪
13:玉 14:保持器 20:ポケット
21:環状部 22:柱部 24:対向面
31:対向部 32:対向部 37:中実部
40:径方向外側面 41:第一退避面 42:第二退避面
51:内輪軌道面 52:外輪軌道面 53:第一の肩部
54:第二の肩部 55:第一の肩部 56:第二の肩部
57:第一の境界部 58:第二の境界部 59:第一の境界部
61:傾斜面 70:ポケット 71:環状部
72:柱部 79:径方向内側面 80:対向面
81:第一の退避面 82:第二の退避面 84:保持器
10: Rolling bearing 11: Inner ring 12: Outer ring 13: Ball 14: Cage 20: Pocket 21: Annular part 22: Column part 24: Opposing surface 31: Opposing part 32: Opposing part 37: Solid part 40: Outer in the radial direction Side surface 41: First retraction surface 42: Second retraction surface 51: Inner ring raceway surface 52: Outer ring raceway surface 53: First shoulder portion 54: Second shoulder portion 55: First shoulder portion 56: Second shoulder Portion 57: First boundary portion 58: Second boundary portion 59: First boundary portion 61: Inclined surface 70: Pocket 71: Annular portion 72: Column portion 79: Radial inner side surface 80: Opposing surface 81: First One retraction surface 82: Second retraction surface 84: Cage

Claims (5)

外周側に内輪軌道面を有している内輪と、
内周側に外輪軌道面及び当該外輪軌道面の軸方向一方側に設けられている肩部を有している外輪と、
前記内輪と前記外輪との間に設けられている複数の玉と、
軸方向一方側の環状部及び当該環状部から軸方向他方側に延びて設けられている複数の柱部を有し周方向で隣り合う前記柱部の間が前記玉を収容するポケットとなる環状の保持器と、備え、
前記保持器の径方向外側面は、前記肩部と隙間を有して対向する対向面と、当該対向面よりも径方向内側に位置し前記柱部が径方向外側に弾性変形した際に前記肩部及び前記外輪軌道面の間の境界部との干渉を防ぐための退避面と、を有している、転がり軸受。
An inner ring having an inner ring raceway surface on the outer peripheral side;
An outer ring having an outer ring raceway surface on the inner peripheral side and a shoulder portion provided on one axial side of the outer ring raceway surface;
A plurality of balls provided between the inner ring and the outer ring;
An annular portion having an annular portion on one side in the axial direction and a plurality of column portions provided extending from the annular portion to the other side in the axial direction and serving as a pocket for accommodating the balls between the adjacent column portions in the circumferential direction With a cage,
A radially outer surface of the retainer is opposed to the shoulder portion with a gap and is opposed to the opposite surface, and is located radially inward from the opposed surface and the column portion is elastically deformed radially outward. A rolling bearing having a retraction surface for preventing interference with a boundary portion between a shoulder portion and the outer ring raceway surface.
前記保持器は、前記ポケットの軸方向他方側に、当該ポケットよりも狭い間隔で周方向に対向している一対の対向部を有しており、
前記柱部は、前記対向部を当該柱部の一部として有していると共に、当該対向部の周方向の変形を阻害する中実部を軸方向他方側に有している、請求項1に記載の転がり軸受。
The retainer has a pair of opposed portions opposed to each other in the circumferential direction at an interval narrower than the pocket on the other axial side of the pocket.
The said pillar part has the solid part which inhibits the deformation | transformation of the circumferential direction of the said opposing part on the other side of an axial direction while having the said opposing part as a part of the said pillar part. Rolling bearings as described in
前記外輪は、前記外輪軌道面の軸方向他方側に設けられている第二の肩部を更に有し、
前記保持器は、前記退避面よりも径方向内側に位置し前記柱部が径方向外側に弾性変形した際に前記第二の肩部及び前記外輪軌道面の間の第二の境界部との干渉を防ぐための第二の退避面を更に有している、請求項1又は2に記載の転がり軸受。
The outer ring further includes a second shoulder provided on the other axial side of the outer ring raceway surface,
The retainer is located radially inward of the retraction surface, and the second boundary portion between the second shoulder portion and the outer ring raceway surface when the column portion is elastically deformed radially outward. The rolling bearing according to claim 1, further comprising a second withdrawal surface for preventing interference.
前記環状部の軸方向一方側の側面は、前記外輪側に向かうにしたがって更に軸方向一方側へ向かう傾斜面を有している、請求項1〜3のいずれか一項に記載の転がり軸受。   The rolling bearing according to any one of claims 1 to 3, wherein a side surface on one axial side of the annular portion has an inclined surface further toward the one axial side as it goes to the outer ring side. 外周側に内輪軌道面及び当該内輪軌道面の軸方向一方側に設けられている肩部を有している内輪と、
内周側に外輪軌道面を有している外輪と、
前記内輪と前記外輪との間に設けられている複数の玉と、
軸方向一方側の環状部及び当該環状部から軸方向他方側に延びて設けられている複数の柱部を有し周方向で隣り合う前記柱部の間が前記玉を収容するポケットとなる環状の保持器と、備え、
前記保持器の径方向内側面は、前記肩部と隙間を有して対向する対向面と、当該対向面よりも径方向外側に位置し前記柱部が径方向内側に弾性変形した際に前記肩部及び前記内輪軌道面の間の境界部との干渉を防ぐための退避面と、を有している、転がり軸受。
An inner ring having an inner ring raceway surface on the outer peripheral side and a shoulder provided on one side in the axial direction of the inner ring raceway surface;
An outer ring having an outer ring raceway surface on the inner peripheral side;
A plurality of balls provided between the inner ring and the outer ring;
An annular portion having an annular portion on one side in the axial direction and a plurality of column portions provided extending from the annular portion to the other side in the axial direction and serving as a pocket for accommodating the balls between the adjacent column portions in the circumferential direction With a cage,
A radially inner side surface of the retainer is opposed to the shoulder portion with a gap and is opposed to the opposite surface, and is positioned radially outward from the opposed surface and the column portion is elastically deformed radially inward. A rolling bearing having a retraction surface for preventing interference with a boundary portion between a shoulder portion and the inner ring raceway surface.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5520906A (en) * 1978-07-28 1980-02-14 Nippon Seiko Kk Ball bearing with retainer
JPS6389429U (en) * 1986-12-02 1988-06-10
JPH07208481A (en) * 1994-01-26 1995-08-11 Ntn Corp Ball bearing cage
JP2002147463A (en) * 2000-11-13 2002-05-22 Nsk Ltd Crown type cage
JP2010071363A (en) * 2008-09-17 2010-04-02 Jtekt Corp Rolling bearing
JP2011185439A (en) * 1997-07-01 2011-09-22 Jtekt Corp Synthetic resin retainer for bearing, method of manufacturing the same, and rolling bearing
US20150211577A1 (en) * 2012-08-22 2015-07-30 Aktiebolaget Skf Roller bearing cage, roller bearing, and electric steering for a motor vehicle
JP2015163814A (en) * 2014-01-31 2015-09-10 セイコーインスツル株式会社 Cage, rolling bearing, and dental handpiece

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5520906A (en) * 1978-07-28 1980-02-14 Nippon Seiko Kk Ball bearing with retainer
JPS6389429U (en) * 1986-12-02 1988-06-10
JPH07208481A (en) * 1994-01-26 1995-08-11 Ntn Corp Ball bearing cage
JP2011185439A (en) * 1997-07-01 2011-09-22 Jtekt Corp Synthetic resin retainer for bearing, method of manufacturing the same, and rolling bearing
JP2002147463A (en) * 2000-11-13 2002-05-22 Nsk Ltd Crown type cage
JP2010071363A (en) * 2008-09-17 2010-04-02 Jtekt Corp Rolling bearing
US20150211577A1 (en) * 2012-08-22 2015-07-30 Aktiebolaget Skf Roller bearing cage, roller bearing, and electric steering for a motor vehicle
JP2015163814A (en) * 2014-01-31 2015-09-10 セイコーインスツル株式会社 Cage, rolling bearing, and dental handpiece

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