JP6127470B2 - Roller bearing cage - Google Patents

Roller bearing cage Download PDF

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JP6127470B2
JP6127470B2 JP2012257561A JP2012257561A JP6127470B2 JP 6127470 B2 JP6127470 B2 JP 6127470B2 JP 2012257561 A JP2012257561 A JP 2012257561A JP 2012257561 A JP2012257561 A JP 2012257561A JP 6127470 B2 JP6127470 B2 JP 6127470B2
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annular portion
bearing
chamfer
roller bearing
cage
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JP2014105737A (en
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匠 竹内
匠 竹内
大紀 前島
大紀 前島
武始 前島
武始 前島
日比　勉
勉 日比
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • F16C19/364—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Description

本発明は、ころ軸受用の保持器の改良に関し、特に軸受の組立工程において保持器を安定して搬送する技術に関するものである。   The present invention relates to an improvement of a cage for a roller bearing, and more particularly to a technique for stably conveying the cage in a bearing assembly process.

従来より、車両のディファレンシャルギヤのピニオン軸をはじめとする各種の駆動装置には、その回転機構を回転自在に支持する軸受が適用されており、当該軸受には、内外輪間に組み込まれた複数の転動体を転動自在に保持する複数のポケットを有する保持器が設けられている。かかる軸受としては、比較的小さな荷重を支持する際に適用する玉軸受と、比較的大きな荷重を支持する際に適用するころ軸受とがあるが、近年における高荷重下での高速回転に対応するために、円すいころ軸受が適用される場合が多くなっている。   Conventionally, various drive devices including a pinion shaft of a differential gear of a vehicle have been applied with a bearing that rotatably supports the rotation mechanism. The bearing includes a plurality of built-in bearings between inner and outer rings. A cage having a plurality of pockets for freely rolling the rolling element is provided. As such a bearing, there are a ball bearing that is applied when supporting a relatively small load and a roller bearing that is applied when supporting a relatively large load, which corresponds to high-speed rotation under a high load in recent years. For this reason, tapered roller bearings are often used.

円すいころ軸受には、例えば特許文献１に示すような保持器が転動体（円すいころ）と共に組み込まれている。かかる構成の一例として図４（ａ）には、複数の円すいころ３の回転軸Ｚが軸受の回転中心軸（軌道輪１，２の回転中心を通る中心軸（不図示））上の一点に集束するように設計された円すいころ軸受が示されている。この円すいころ軸受には、相対回転可能に対向配置された軌道輪である内輪１及び外輪２と、内外輪１，２の対向面にそれぞれ周方向に連続して形成された内輪軌道面１ｓ及び外輪軌道面２ｓの間に沿って転動自在に組み込まれた複数の円すいころ３と、これら円すいころ３を１つずつ転動自在に保持しながら、内外輪１，２間に沿って公転する樹脂製の保持器４とが設けられている。   In the tapered roller bearing, for example, a cage as shown in Patent Document 1 is incorporated together with a rolling element (tapered roller). As an example of such a configuration, in FIG. 4A, the rotation axis Z of the plurality of tapered rollers 3 is set at one point on the rotation center axis of the bearing (center axis (not shown) passing through the rotation center of the bearing rings 1 and 2). A tapered roller bearing designed to converge is shown. The tapered roller bearing includes an inner ring 1 and an outer ring 2 that are opposed to each other so as to be relatively rotatable, an inner ring raceway surface 1 s formed continuously in a circumferential direction on opposing surfaces of the inner and outer rings 1 and 2, and A plurality of tapered rollers 3 incorporated so as to be able to roll along the outer ring raceway surface 2s, and revolving along the inner and outer rings 1, 2 while holding the tapered rollers 3 one by one so as to roll freely. A resin cage 4 is provided.

かかる構成において、内輪１の内輪軌道面１ｓに沿って環状の鍔部が突出されており、図面には、内輪１の軌道面１ｓの小径側（図の左側）に環状の小径鍔部１０を．大径側（図の右側）に環状の大径鍔部１１を、それぞれ突出させた構成が例示されている。これにより、複数の円すいころ３が内外輪１，２の各軌道面１ｓ，２ｓ間を転動する際、円すいころ３は、各鍔部１０，１１の案内面（軸受内部側の面）によって保持されながら各軌道面１ｓ，２ｓ間に沿って案内される。このとき、各円すいころ３は、保持器４に形成された複数のポケット８に１つずつ保持されて回転軸Ｚを中心に回転（自転）する。   In such a configuration, an annular flange portion protrudes along the inner ring raceway surface 1s of the inner ring 1, and in the drawing, an annular small diameter flange portion 10 is provided on the small diameter side (left side in the drawing) of the raceway surface 1s of the inner ring 1. . The structure which protruded the cyclic | annular large diameter collar part 11 to the large diameter side (right side of a figure), respectively is illustrated. Thus, when the plurality of tapered rollers 3 roll between the raceway surfaces 1 s and 2 s of the inner and outer rings 1 and 2, the tapered rollers 3 are moved by the guide surfaces (surfaces on the bearing inner side) of the flange portions 10 and 11. It is guided along each track surface 1s, 2s while being held. At this time, each tapered roller 3 is held one by one in a plurality of pockets 8 formed in the cage 4 and rotates (rotates) around the rotation axis Z.

また、内外輪１，２の各軌道面１ｓ，２ｓは、各円すいころ３の回転軸Ｚの集束方向（図の左側）に沿って傾斜しており、これに対応して、内輪軌道面１ｓの両側に突出した各鍔部１０，１１は、その外周面の径寸法が相互に異なる。即ち、大径鍔部１１は、比較的大径となり、小径鍔部１０は、大径鍔部１１よりも比較的小径となっている。   Further, the raceway surfaces 1s and 2s of the inner and outer rings 1 and 2 are inclined along the converging direction (left side in the figure) of the rotation axis Z of each tapered roller 3, and correspondingly, the inner ring raceway surface 1s. The flange portions 10 and 11 projecting on both sides of the outer peripheral surface have different diameters on the outer peripheral surface. That is, the large-diameter collar 11 has a relatively large diameter, and the small-diameter collar 10 has a relatively smaller diameter than the large-diameter collar 11.

また、保持器４は、図４（ｂ）に示すように、内外輪１，２間に沿って周方向に連続し且つ互いに同心に所定の間隔を空けて対向配置された小径側円環部５及び大径側円環部６と、これら円環部５，６の間に亘って延出し且つ各円環部５，６に沿って周方向に所定間隔で配列された複数の柱部７とを備えている。さらに、小径側円環部５と大径側円環部６と隣接する柱部７とによって区画された部分に、前記ポケット８が構成されており、このポケット８により、円すいころ３を１つずつ転動自在に保持している。各円環部５，６は、各軌道面１ｓ，２ｓの傾斜方向に沿って互いに径が異なっており、大径側円環部６は、小径側円環部５よりも比較的大径であり、これにより、保持器４は、その全体が円錐台形状を成している。   Further, as shown in FIG. 4B, the retainer 4 is a small-diameter-side annular portion that is continuously disposed in the circumferential direction between the inner and outer rings 1 and 2 and concentrically opposed to each other at a predetermined interval. 5 and the large-diameter-side annular portion 6 and a plurality of column portions 7 extending between the annular portions 5 and 6 and arranged along the annular portions 5 and 6 at a predetermined interval in the circumferential direction. And. Further, the pocket 8 is formed in a portion defined by the small diameter side annular portion 5, the large diameter side annular portion 6 and the adjacent column portion 7, and one tapered roller 3 is formed by the pocket 8. Each roll is held freely. The annular portions 5 and 6 have different diameters along the inclination direction of the raceway surfaces 1 s and 2 s, and the large-diameter side annular portion 6 has a relatively larger diameter than the small-diameter side annular portion 5. Thus, the cage 4 as a whole has a truncated cone shape.

このような円すいころ軸受を組み立てる場合には、多数の保持器４が積層されて蓄えられているストッカー装置から保持器４を１つずつ取り出した後、保持器４の各ポケット８に円すいころ３を挿入する組立装置まで、保持器４を搬送する搬送工程がある。保持器４は、例えば図４（ｃ）に示すように、小径側円環部５を下側（搬送面２１側）に向けた状態で、ストッカー装置（不図示）から組立装置（不図示）に向かって（図の右方向）、搬送面２１上を２本の保持アーム２０に両側を支えられながら移動する。この時、ストッカー装置と組立装置の各搬送面に垂直方向の段差２２が存在すると、段差２２に衝突した保持器４が転倒する可能性ある。保持器４が転倒して保持アーム２０から脱落した場合（図４（ｃ）の右側の状態）には、組立作業が困難となるばかりではなく、保持器４が損傷する虞もある。   When assembling such a tapered roller bearing, after the cages 4 are taken out one by one from the stocker device in which a number of cages 4 are stacked and stored, the tapered rollers 3 are placed in the pockets 8 of the cage 4. There is a transporting process for transporting the cage 4 to the assembling apparatus for inserting the holder. For example, as shown in FIG. 4C, the retainer 4 is assembled from a stocker device (not shown) to an assembly device (not shown) with the small-diameter side annular portion 5 facing downward (on the conveyance surface 21 side). Moving toward the right (right direction in the figure), the two holding arms 20 are supported on both sides of the conveying surface 21 while moving on both sides. At this time, if there is a vertical step 22 on each conveying surface of the stocker device and the assembling device, the cage 4 colliding with the step 22 may fall over. When the cage 4 falls and falls off the holding arm 20 (the state on the right side of FIG. 4C), not only the assembly work becomes difficult, but the cage 4 may be damaged.

特開２００７−３２１９１１号公報JP 2007-321911 A

本発明は、このような問題を解決するためになされており、その目的は、安定して搬送することが可能なころ軸受用保持器を提供することにある。   The present invention has been made to solve such problems, and an object thereof is to provide a roller bearing retainer that can be stably conveyed.

上記課題を解決するために、本発明は、軸受内部において複数のころを転動自在に保持しながら、これら複数のころと共に軸受内部に沿って公転する樹脂製のころ軸受用保持器であって、
軸受内部に沿って周方向に連続した少なくとも１つの円環部と、この円環部から軸受内部に沿って軸方向に延出し、当該円環部に沿って周方向に所定間隔で配列された複数の柱部と、前記円環部と前記柱部とによって区画され、前記ころを１つずつ転動自在に保持する複数のポケットと、を有している。
特に、本発明のころ軸受用保持器は、前記円環部の外径面と端面との間に全周に亙って面取りを設け、前記ポケットにころを保持した状態における外接円直径が３０〜１００（ｍｍ）であり、前記面取りの軸方向幅寸法が１（ｍｍ）以上であり、前記面取りと前記円環部の端面から径方向外方に延びる直線との成す角度が３０度以上４５度以下である。 In order to solve the above problems, the present invention is a resin roller bearing retainer that revolves along the inside of the bearing together with the plurality of rollers while holding the plurality of rollers in a freely rolling manner. ,
At least one annular portion that is continuous in the circumferential direction along the bearing interior, and extends axially from the annular portion along the bearing interior, and is arranged at predetermined intervals in the circumferential direction along the annular portion. A plurality of pillars, and a plurality of pockets that are partitioned by the annular part and the pillars and hold the rollers in a rollable manner one by one.
In particular, the roller bearing cage of the present invention has a circumscribed circle diameter of 30 when a chamfer is provided over the entire circumference between the outer diameter surface and the end surface of the annular portion, and the roller is held in the pocket. -100 (mm), the chamfer has an axial width dimension of 1 (mm) or more, and an angle formed between the chamfer and a straight line extending radially outward from the end surface of the annular portion is not less than 30 degrees 45 Less than or equal to degrees .

本発明によれば、安定して搬送することが可能なころ軸受用保持器を実現することができる。   According to the present invention, it is possible to realize a roller bearing retainer that can be stably conveyed.

本発明の実施の形態の第１例に係るころ軸受用保持器の全体の構成例を示す斜視図（ａ）、面取りの部分拡大図（ｂ）。The perspective view (a) which shows the example of a whole structure of the roller bearing retainer which concerns on the 1st example of embodiment of this invention, The partial enlarged view (b) of a chamfer. 本発明の実施の形態の第２例に係る面取りの部分拡大図。The chamfering partial enlarged view which concerns on the 2nd example of embodiment of this invention. 面取り形状と進入角との関係を示すグラフ（ａ）、進入角の説明図（ｂ）。The graph (a) which shows the relationship between a chamfering shape and an approach angle, explanatory drawing (b) of an approach angle. 円すいころ軸受の構造を示す断面図（ａ）、保持器の斜視図（ｂ）、搬送工程の説明図（ｃ）。Sectional drawing (a) which shows the structure of a tapered roller bearing, the perspective view (b) of a holder | retainer, explanatory drawing (c) of a conveyance process.

［実施の形態の第１例］
図１は、本発明の実施の形態の第１例を示している。本例を含め、本発明のころ軸受用保持器４ａの特徴は、小径側円環部５ａに面取り９を設け、さらにその面取り形状を規制した点にある。この特徴部分以外の構造は、図４（ａ）,（ｂ）に示した構造を含め、従来から知られているころ軸受及びころ軸受用保持器の構造とほぼ同様であるから、従来と同様に構成する部分に関しては、説明を省略又は簡略にし、以下、本例の特徴部分を中心に説明する。 [First example of embodiment]
FIG. 1 shows a first example of an embodiment of the present invention. A feature of the roller bearing retainer 4a of the present invention, including this example, is that a chamfer 9 is provided on the small-diameter-side annular portion 5a and the chamfered shape is regulated. Since the structure other than this characteristic part is almost the same as the structure of the conventionally known roller bearing and roller bearing cage, including the structure shown in FIGS. The description of the parts constituting the above will be omitted or simplified, and the characteristic parts of this example will be mainly described below.

本例のころ軸受用保持器は、前述した従来構造と同様に、内輪１の外周面に形成された内輪軌道面１ｓと外輪２の内周面に形成された外輪軌道面２ｓとの間に組み込まれた複数の円すいころ３を、１つずつ転動自在に保持しながら、内外輪１，２間に沿って公転する。尚、本例に於いては転動体として円すいころ３を示したが、例えば円筒ころ、針状ころ、球面ころなどを適用することができる。   The roller bearing retainer of this example is provided between the inner ring raceway surface 1 s formed on the outer peripheral surface of the inner ring 1 and the outer ring raceway surface 2 s formed on the inner peripheral surface of the outer ring 2, as in the conventional structure described above. The plurality of tapered rollers 3 incorporated are revolved along the inner and outer rings 1 and 2 while being held one by one so as to be freely rotatable. In this example, the tapered roller 3 is shown as the rolling element, but, for example, a cylindrical roller, a needle roller, a spherical roller, or the like can be applied.

図１（ａ）には、本実施の形態に係るころ軸受用保持器の全体構成が例示されており、当該ころ軸受用の保持器４ａは、軸受内部に沿って周方向に連続した小径側円環部５ａ及び大径側円環部６と、各円環部５ａ，６から軸受内部に沿って延出し、各円環部５ａ，６に沿って周方向に所定間隔で配列された複数の柱部７と、各円環部５ａ、６と隣接する柱部７とによって区画され、円すいころ３（不図示）を１つずつ転動自在に保持する複数のポケット８とを備えている。同図においては、互いに径の異なる２つの円環部（小径側円環部５ａ、大径側円環部６）が互いに同心に所定の間隔を空けて対向配置され、複数の柱部７は、これら一対の円環部５ａ，６の間に亘って延出し、その両端部を各円環部５ａ，６に接合されている。   FIG. 1A illustrates the overall configuration of a roller bearing retainer according to the present embodiment. The roller bearing retainer 4a has a small-diameter side continuous in the circumferential direction along the bearing interior. A plurality of annular portions 5a and a large-diameter-side annular portion 6, and a plurality of annular portions 5a, 6 extending along the inside of the bearing and arranged along the annular portions 5a, 6 at a predetermined interval in the circumferential direction. And a plurality of pockets 8 each of which is divided by each of the annular portions 5a, 6 and the adjacent column portion 7 and holds the tapered rollers 3 (not shown) in a rollable manner one by one. . In the figure, two annular parts having different diameters (small-diameter side annular part 5a, large-diameter side annular part 6) are concentrically opposed to each other at a predetermined interval, and a plurality of column parts 7 are , Extending between the pair of annular portions 5a, 6 and both ends thereof are joined to the annular portions 5a, 6 respectively.

また、前記保持器４ａは、合成樹脂を射出成形する事により、一体に造られている。射出成形用の合成樹脂の種類は特に問わず、例えばポリアミド６６（ＰＡ６６）、ポリアミド４６（ＰＡ４６）、ポリフェニレンサルファイド（ＰＰＳ）等、合成樹脂製保持器の射出成形用として従来から一般的に使用されていた、各種合成樹脂を使用できる。何れの合成樹脂にしても、単独で、或は炭素繊維、ガラス繊維等の強化用繊維或は強化用のセラミックウィスカ等と混合したものを使用できる。   The cage 4a is integrally formed by injection molding a synthetic resin. There are no particular restrictions on the type of synthetic resin used for injection molding. For example, polyamide 66 (PA66), polyamide 46 (PA46), polyphenylene sulfide (PPS), etc., which have been generally used for injection molding of synthetic resin cages. Various synthetic resins that have been used can be used. Any synthetic resin can be used alone or mixed with a reinforcing fiber such as carbon fiber or glass fiber or a ceramic whisker for reinforcement.

特に本例の場合、小径側円環部５ａの外径面と端面との間に、全周に亙って面取り９を設けている。この面取り９は、軸方向において小径円環部５ａの端面側（図１の下側）に向かうに従い小径となる部分円錐面形状であり、軸方向の幅寸法Ａを１（ｍｍ）以上とすると共に、面取り９と小径円環部５ａの端面から径方向外方に延びる直線とが成す面取り角度αを３０度以上に規制している。   Particularly in the case of this example, a chamfer 9 is provided over the entire circumference between the outer diameter surface and the end surface of the small-diameter side annular portion 5a. The chamfer 9 has a partial conical surface shape that becomes smaller in diameter in the axial direction toward the end surface side (lower side in FIG. 1) of the small-diameter annular portion 5a, and has an axial width dimension A of 1 (mm) or more. At the same time, the chamfer angle α formed by the chamfer 9 and a straight line extending radially outward from the end surface of the small-diameter annular portion 5a is restricted to 30 degrees or more.

このように、本例のころ軸受用の保持器４ａの場合、小径側円環部５ａの外径面と端面との間に面取りを設けているので、保持器４ａを安定して搬送することができる。
即ち、保持器４ａの小径側円環部５ａの端面を、搬送面２１上を滑らせて当該保持器４ａを搬送する場合（図４（ｃ）参照）、搬送面２１に段差２２（異物の付着等も含む）が存在したとしても、面取り９により段差部分を円滑に通過することができる。従って、保持器４ａが搬送中に段差２２に躓いて転倒することを防止したことで、安定して保持器４ａを搬送でき、組立ラインが停止する事がなくなり、生産性が向上する。また、面取り９は、保持器４ａを射出成形により製造する際に同時に形成することができるので、コストアップすることなく、且つ高精度に形成することができる。
さらに、面取り９は小径側円環部５ａの端面側に設けられているので、柱部７との接合部である小径円環部５ａの軸受内部側の強度は保たれており、保持器４ａの強度を低下させることはない。 Thus, in the case of the roller bearing retainer 4a of this example, since the chamfer is provided between the outer diameter surface and the end surface of the small diameter side annular portion 5a, the retainer 4a can be stably conveyed. Can do.
That is, when the retainer 4a is transported by sliding the end surface of the small-diameter-side annular portion 5a of the retainer 4a on the transport surface 21 (see FIG. 4C), the step 22 (foreign matter) Even if there is adhesion etc.), the chamfer 9 can smoothly pass the stepped portion. Therefore, since the cage 4a is prevented from falling over the step 22 during conveyance, the cage 4a can be stably conveyed, the assembly line is not stopped, and productivity is improved. Further, since the chamfer 9 can be formed at the same time when the cage 4a is manufactured by injection molding, it can be formed with high accuracy without increasing the cost.
Further, since the chamfer 9 is provided on the end face side of the small diameter side annular portion 5a, the strength of the inside of the bearing of the small diameter circular portion 5a, which is a joint portion with the column portion 7, is maintained, and the cage 4a. It does not reduce the strength.

尚、前記ポケット８に円すいころ３を保持し、内輪１と一体に組立てられた状態における外接円直径Ｄ（図４（ａ）参照）は、３０〜１００（ｍｍ）とすることが好ましい。このように、比較的直径が小さい円すいころ軸受の保持器は、径寸法に対して軸方向幅寸法が大きい為に、搬送面の段差に衝突した際に転倒し易い。従って、本発明の構成を適用することで、安定して保持器を搬送することができる。
また、前記面取り９の形状は、面取り角度αが４５度であるＣ面取りとすることもできる。 In addition, it is preferable that the circumscribed circle diameter D (see FIG. 4A) in the state where the tapered roller 3 is held in the pocket 8 and is assembled integrally with the inner ring 1 is 30 to 100 (mm). As described above, the cage of the tapered roller bearing having a relatively small diameter has a large axial width dimension with respect to the radial dimension, and thus easily falls when colliding with a step on the conveying surface. Therefore, the cage can be stably conveyed by applying the configuration of the present invention.
Further, the shape of the chamfer 9 may be a C chamfer having a chamfer angle α of 45 degrees.

［実施の形態の第２例］
図２は、本発明の実施の形態の第２例を示している。本例の場合、面取り９ａを曲面で形成したＲ面取りとしている。その他の構成及び作用効果は、前述した実施の形態の第１例と同様である。 [Second Example of Embodiment]
FIG. 2 shows a second example of the embodiment of the present invention. In the case of this example, the chamfer 9a is an R chamfer formed by a curved surface. Other configurations and operational effects are the same as those of the first example of the embodiment described above.

ここで、上述したような本発明の各実施例において、ころ軸受用保持器に設けた面取りの効果について、段差高さと進入角との関係により説明する。
図３（ｂ）は、搬送面２１の段差２２に、保持器４ａの面取り９ａが衝突した際の状態を示しており、所定の段差高さにおいて、段差２２の角部は、面取り９と接触した部分における接線の傾きである進入角により、面取り９ａと衝突する。この進入角が小さいほど段差の影響を受けずに円滑に保持器を搬送することができる。 Here, in each embodiment of the present invention as described above, the effect of chamfering provided on the roller bearing cage will be described based on the relationship between the step height and the approach angle.
FIG. 3B shows a state when the chamfer 9a of the retainer 4a collides with the step 22 of the transport surface 21, and the corner of the step 22 contacts the chamfer 9 at a predetermined step height. The chamfer 9a collides with the approach angle which is the inclination of the tangent line in the part. The smaller the approach angle, the more smoothly the cage can be conveyed without being affected by the step.

図３（ａ）は、各面取り形状において、段差高さと進入角との関係を示したグラフである。面取りの幅寸法Ａ（図１（ｂ）参照）を１（ｍｍ）とした保持器の場合には、段差高さが１（ｍｍ）未満であれば常に進入角３０度となり安定して搬送可能であるが、段差高さが１（ｍｍ）を超えると保持器が段差に衝突してしまう。一方、面取りの形状をＲ面取りとした場合には、段差高さにより進入角は変化し、段差高さが１（ｍｍ）を越えても直ちに保持器が段差と衝突することはない。グラフより、Ｒ１．８の場合には段差高さが０．２５（ｍｍ）以下、Ｒ１．５の場合には段差高さが０．２（ｍｍ）以下であれば、進入角は３０度以下となり、安定して保持器が段差を乗り越えることができる。以上のように、保持器を搬送する搬送面の状態（段差の高さ）に応じて、最適な面取り形状を選択することで、保持器が搬送中に段差に躓いて転倒することを防止して、安定して搬送することができる   FIG. 3A is a graph showing the relationship between the step height and the approach angle in each chamfered shape. In the case of a cage with a chamfer width A (see FIG. 1B) of 1 (mm), if the step height is less than 1 (mm), the entrance angle is always 30 degrees and can be conveyed stably. However, if the height of the step exceeds 1 (mm), the cage collides with the step. On the other hand, when the chamfered shape is an R chamfer, the approach angle changes depending on the step height, and the cage does not immediately collide with the step even if the step height exceeds 1 (mm). From the graph, in the case of R1.8, the step height is 0.25 (mm) or less, and in the case of R1.5, the step angle is 30 degrees or less if the step height is 0.2 (mm) or less. Thus, the cage can stably climb over the step. As described above, by selecting the optimal chamfering shape according to the state of the transfer surface (level of the step) for transferring the cage, it is possible to prevent the cage from falling over the step during transfer. Can be transported stably.

本発明のころ軸受用保持器は、車両のディファレンシャルギヤのピニオン軸をはじめとする各種の駆動装置の回転機構を回転自在に支持するころ軸受に適用することができる。   The roller bearing retainer of the present invention can be applied to a roller bearing that rotatably supports various rotation mechanisms of various drive devices including a pinion shaft of a differential gear of a vehicle.

１ 内輪
１ｓ 内輪軌道面
２ 外輪
２ｓ 外輪軌道面
３ 円すいころ
４，４ａ，４ｂ 保持器
５，５ａ，５ｂ 小径側円環部
６ 大径側円環部
７ 柱部
８ ポケット
９，９ａ 面取り
１０ 小径鍔部
１１ 大径鍔部
２０ 保持アーム
２１ 搬送面
２２ 段差
Ｚ 円すいころの回転軸 DESCRIPTION OF SYMBOLS 1 Inner ring 1s Inner ring raceway surface 2 Outer ring 2s Outer ring raceway surface 3 Tapered roller 4, 4a, 4b Cage 5, 5a, 5b Small diameter side ring part 6 Large diameter side ring part 7 Pillar part 8 Pocket 9, 9a Chamfer 10 Small diameter鍔 part 11 Large diameter heel part 20 Holding arm 21 Conveying surface 22 Step difference Z Rotating shaft of tapered roller

Claims (1)

軸受内部において複数のころを転動自在に保持しながら、これら複数のころと共に軸受内部に沿って公転する樹脂製のころ軸受用保持器であって、
軸受内部に沿って周方向に連続した少なくとも１つの円環部と、この円環部から軸受内部に沿って軸方向に延出し、当該円環部に沿って周方向に所定間隔で配列された複数の柱部と、前記円環部と前記柱部とによって区画され、前記ころを１つずつ転動自在に保持する複数のポケットと、を有し、
前記円環部の外径面と端面との間に全周に亙って面取りを設け、
前記ポケットにころを保持した状態における外接円直径が３０〜１００（ｍｍ）であり、
前記面取りの軸方向幅寸法が１（ｍｍ）以上であり、
前記面取りと前記円環部の端面から径方向外方に延びる直線との成す角度が３０度以上４５度以下であることを特徴とするころ軸受用保持器。 A roller bearing cage made of resin that revolves along the inside of the bearing together with the plurality of rollers while holding the plurality of rollers movably inside the bearing,
At least one annular portion that is continuous in the circumferential direction along the bearing interior, and extends axially from the annular portion along the bearing interior, and is arranged at predetermined intervals in the circumferential direction along the annular portion. A plurality of pillars, and a plurality of pockets that are partitioned by the annular part and the pillars and hold the rollers in a rollable manner one by one,
Chamfering is provided over the entire circumference between the outer diameter surface and the end surface of the annular portion ,
The circumscribed circle diameter in a state where the roller is held in the pocket is 30 to 100 (mm),
The axial width dimension of the chamfer is 1 (mm) or more,
The roller bearing retainer, wherein an angle formed between the chamfer and a straight line extending radially outward from an end surface of the annular portion is 30 degrees or more and 45 degrees or less .
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JP2000213545A (en) * 1999-01-25 2000-08-02 Nsk Ltd Retainer for roller bearing
JP3814825B2 (en) * 2001-07-31 2006-08-30 日本精工株式会社 Bearing device
JP2011163387A (en) * 2010-02-05 2011-08-25 Jtekt Corp Tapered roller bearing

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