JP2006125457A - Cage for needle bearing and its manufacturing method - Google Patents

Cage for needle bearing and its manufacturing method Download PDF

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JP2006125457A
JP2006125457A JP2004312105A JP2004312105A JP2006125457A JP 2006125457 A JP2006125457 A JP 2006125457A JP 2004312105 A JP2004312105 A JP 2004312105A JP 2004312105 A JP2004312105 A JP 2004312105A JP 2006125457 A JP2006125457 A JP 2006125457A
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cage
needle bearing
manufacturing
column
roller
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Takao Okuma
孝雄 大熊
Satoshi Kadokawa
聡 角川
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NSK Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a cage for a needle bearing with an extruded portion less liable to break while securing a sufficient amount of extrusion, and to provide its manufacturing method. <P>SOLUTION: In the cage 12 for the needle bearing 10, the side face (the peripheral side face) of a guide portion 12d is pressed at both sides and pushed up outward in the radial direction. Thus, the extruded portion 12f gains a thickness and an extrusion amount. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えば自動変速機用遊星歯車機構等に用いられると好適なニードル軸受用の保持器及びその製造方法に関する。   The present invention relates to a needle bearing retainer suitable for use in, for example, a planetary gear mechanism for an automatic transmission, and a method for manufacturing the same.

車両等に搭載されている自動変速機において、一般的には遊星歯車機構が用いられている。ここで、ラジアルニードル軸受は、細径のころを用いていることから、内輪外径と外輪内径との差が小さいスペースにも収めることができるので、遊星歯車機構の遊星歯車を回転自在に支持するために用いると、それを搭載した自動変速機のコンパクト化に寄与するので好ましいといえる（特許文献１参照）。
特開２００２−３４９６４７号公報 特開２００２−１０６５７５号公報 In an automatic transmission mounted on a vehicle or the like, a planetary gear mechanism is generally used. Here, since the radial needle bearing uses small-diameter rollers, it can fit in a space where the difference between the inner ring outer diameter and the outer ring inner diameter is small, so that the planetary gear of the planetary gear mechanism can be rotatably supported. Therefore, it can be said that it is preferable because it contributes to downsizing of an automatic transmission equipped with the automatic transmission (see Patent Document 1).
JP 2002-349647 A JP 2002-106575 A

ところで、特許文献２に示すタイプのラジアルニードル軸受は、単体でのころバレを防止するために、保持器の柱部を半径方向に押し込むことで、塑性変形により周方向に張り出させた張り出し部を設けている。しかるに、例えば外径が小さく、ころ径が大きなニードル軸受の場合には、押し込み量を大きくしなければ、十分な張り出し量を確保できず、それにより張り出し部先端と、ころとのスキマが小さくなり、ラジアルニードル軸受の動作時に、ころが張り出し部に衝突することで、その破損を招く恐れがある。一方、十分な張り出し量を確保しようとすると、張り出し部が薄くなって強度が低下し、ラジアルニードル軸受の動作時に、同様にころが張り出し部に衝突することで、その破損を招く恐れがある。   By the way, the radial needle bearing of the type shown in Patent Document 2 is an overhanging portion that is protruded in the circumferential direction by plastic deformation by pushing the pillar portion of the cage in the radial direction in order to prevent single roller rolling. Is provided. However, for example, in the case of a needle bearing with a small outer diameter and a large roller diameter, a sufficient amount of overhang cannot be secured unless the push-in amount is increased, thereby reducing the clearance between the tip of the overhang portion and the roller. During the operation of the radial needle bearing, the roller may collide with the overhanging portion, which may cause damage. On the other hand, if it is attempted to secure a sufficient amount of overhang, the overhanging portion becomes thin and the strength is lowered, and when the radial needle bearing is operated, the rollers may collide with the overhanging portion in the same manner, which may cause damage.

本発明は、上述したような問題点に鑑みてなされたものであり、十分な張り出し量を確保しながらも張り出し部の破損を抑制できるニードル軸受用の保持器及びその製造方法を提供することを目的とする。   The present invention has been made in view of the problems as described above, and provides a cage for a needle bearing and a method for manufacturing the same that can suppress damage to the overhang portion while securing a sufficient overhang amount. Objective.

第１の本発明のニードル軸受用の保持器は、一対の環状部と、前記環状部を連結する複数の柱部とからなり、ころを保持するニードル軸受用の保持器において、
前記保持器の柱部に凹部を形成することによって、ころバレ防止用の張り出し部を創成し、前記保持器の外径から前記凹部までの最大距離をΔとし、前記ニードル軸受のＰＣＤをＤとし、ころ径をｄとしたときに、以下の式のいずれかが成立することを特徴とする。
０．００５＜Δ／Ｄ＜０．０４４ （１）
０．０２５＜Δ／ｄ＜０．２ （２） The cage for a needle bearing according to the first aspect of the present invention comprises a pair of annular portions and a plurality of column portions connecting the annular portions, and the cage for a needle bearing that holds rollers,
By forming a concave portion in the retainer column portion, an overhang portion for preventing roller run-off is created, the maximum distance from the outer diameter of the retainer to the concave portion is Δ, and the PCD of the needle bearing is D. When the roller diameter is d, one of the following formulas is established.
0.005 <Δ / D <0.044 (1)
0.025 <Δ / d <0.2 (2)

第２の本発明のニードル軸受用の保持器の製造方法は、一対の環状部と、前記環状部を連結する複数の柱部とからなり、ころを保持するニードル軸受用の保持器の製造方法において、
板材を打ち抜くことによって前記柱部を形成するピアス工程と、
形成された柱部を、隣接する柱部側から第１の方向に押圧すると共に、前記第１の方向に対して交差する第２の方向に押圧することによって張り出し部を形成する張り出し部形成工程と、を有することを特徴とする The method for manufacturing a cage for a needle bearing according to the second aspect of the present invention comprises a pair of annular portions and a plurality of column portions connecting the annular portions, and a method for manufacturing a cage for a needle bearing that holds rollers. In
A piercing step of forming the pillar portion by punching a plate material;
A projecting part forming step of forming the projecting part by pressing the formed pillar part in the first direction from the adjacent pillar part side and in the second direction intersecting the first direction. And characterized by having

第１の本発明のニードル軸受用の保持器によれば、一対の環状部と、前記環状部を連結する複数の柱部とからなり、ころを保持するニードル軸受用の保持器において、前記保持器の柱部に凹部を形成することによって、ころバレ防止用の張り出し部を創成し、前記保持器の外径から前記凹部までの最大距離をΔとし、前記ニードル軸受のＰＣＤをＤとし、ころ径をｄとしたときに、以下の式のいずれかが成立するので、前記張り出し部の肉厚を十分に確保でき、ラジアルニードル軸受の動作時に、ころが張り出し部に衝突したときにも、その破損を効果的に抑制できる。
０．００５＜Δ／Ｄ＜０．０４４ （１）
０．０２５＜Δ／ｄ＜０．２ （２） According to the retainer for a needle bearing of the first aspect of the present invention, the retainer for a needle bearing, which includes a pair of annular portions and a plurality of column portions that connect the annular portions, retains the rollers. By forming a recess in the column of the container, an overhang for preventing roller run-off is created, the maximum distance from the outer diameter of the cage to the recess is Δ, the PCD of the needle bearing is D, When the diameter is d, either of the following formulas is satisfied, so that the wall thickness of the overhanging portion can be sufficiently secured, and even when the roller collides with the overhanging portion during the operation of the radial needle bearing, Damage can be effectively suppressed.
0.005 <Δ / D <0.044 (1)
0.025 <Δ / d <0.2 (2)

前記張り出し部は、前記保持器の外径より内方に位置すると好ましい。   The overhanging portion is preferably located inward from the outer diameter of the cage.

第２の本発明のニードル軸受用の保持器の製造方法によれば、一対の環状部と、前記環状部を連結する複数の柱部とからなり、ころを保持するニードル軸受用の保持器の製造方法において、板材を打ち抜くことによって前記柱部を形成するピアス工程と、形成された柱部を、隣接する柱部側から第１の方向に押圧すると共に、前記第１の方向に対して交差する第２の方向に押圧することによって張り出し部を形成する張り出し部形成工程と、を有するので、前記柱部の周方向の幅を絞ることによって前記張り出し部の肉厚を十分に確保でき、ラジアルニードル軸受の動作時に、ころが張り出し部に衝突したときにも、その破損を効果的に抑制できる。   According to the method for manufacturing a cage for a needle bearing according to the second aspect of the present invention, a needle bearing cage for holding a roller comprising a pair of annular portions and a plurality of column portions connecting the annular portions. In the manufacturing method, the piercing step of forming the column portion by punching a plate material, and pressing the formed column portion in the first direction from the adjacent column portion side, and intersecting the first direction A projecting portion forming step of forming the projecting portion by pressing in the second direction, so that the thickness of the projecting portion can be sufficiently secured by narrowing the width in the circumferential direction of the column portion, and the radial Even when the roller collides with the protruding portion during the operation of the needle bearing, the breakage can be effectively suppressed.

前記張り出し部形成工程において、前記柱部の幅より狭い幅の第１の型に向かって、第２の型を用いて前記柱部を押し込むと好ましい。   In the overhang portion forming step, it is preferable that the column portion is pushed in using a second die toward a first die having a width narrower than the width of the column portion.

以下、本発明の実施の形態を図面を参照して以下に詳細に説明する。図１は、本実施の形態にかかるニードル軸受を含む車両の自動変速機１の断面図である。図１において、エンジンのクランクシャフト２から出力されるトルクは、トルクコンバータ３を介して伝達され、更に複数列組み合わせれた遊星歯車機構４，５，６等を介して複数段に減速され、その後デファレンシャルギヤ７及びドライブシャフト８を介して、不図示の車輪に出力されるようになっている。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of an automatic transmission 1 for a vehicle including a needle bearing according to the present embodiment. In FIG. 1, torque output from the crankshaft 2 of the engine is transmitted through a torque converter 3 and further decelerated to a plurality of stages through a plurality of planetary gear mechanisms 4, 5, 6, etc. The power is output to a wheel (not shown) via the differential gear 7 and the drive shaft 8.

図２は、遊星歯車機構４（５，６も原則的に同じ）の分解図である。図２において、遊星歯車機構４は、内歯を有するリングギヤ４ａと、外歯を有する太陽ギヤ４ｂと、リングギヤ４ａ及び太陽ギヤ４ｂに噛合する３つの遊星歯車４ｃと、３つのピニオンシャフト４ｅにより遊星歯車４ｃを回転自在に支持すると共に、自らも回転可能なキャリヤ４ｄとを有する。   FIG. 2 is an exploded view of the planetary gear mechanism 4 (5 and 6 are basically the same). In FIG. 2, the planetary gear mechanism 4 includes a ring gear 4a having internal teeth, a sun gear 4b having external teeth, three planetary gears 4c meshing with the ring gear 4a and the sun gear 4b, and three pinion shafts 4e. The gear 4c is rotatably supported, and has a carrier 4d that can also rotate.

遊星歯車機構４の作動原理を図３に示す。まず、１速の場合、図３（ａ）に示すように、太陽歯車４ｂをドライブ側とし、遊星歯車４ｃ（キャリヤ）をドリブン側とし、リングギヤ４ａを固定することで、大きな減速比が得られる。次に、２速の場合、図３（ｂ）に示すように、太陽歯車４ｂを固定し、遊星歯車４ｃ（キャリヤ）をドリブン側とし、リングギヤ４ａをドライブ側とすることで、中程度の減速比が得られる。更に、３速の場合、図３（ｃ）に示すように、太陽歯車４ｂを固定し、遊星歯車４ｃ（キャリヤ）をドライブ側とし、リングギヤ４ａをドリブン側とすることで、小さな減速比が得られる。尚、後退の場合、図３（ｄ）に示すように、太陽歯車４ｂをドリブン側とし、遊星歯車４ｃ（キャリヤ）を固定し、リングギヤ４ａをドライブ側とすることで、入力に対して出力を逆転させることができる。なお、以上は遊星歯車機構４の動作の一例を示すものであり、必ずしもかかる動作に限られることはない。   The operating principle of the planetary gear mechanism 4 is shown in FIG. First, in the case of the first speed, as shown in FIG. 3A, a large reduction ratio can be obtained by setting the sun gear 4b to the drive side, the planetary gear 4c (carrier) to the driven side, and fixing the ring gear 4a. . Next, in the case of the second speed, as shown in FIG. 3 (b), the sun gear 4b is fixed, the planetary gear 4c (carrier) is set to the driven side, and the ring gear 4a is set to the drive side. A ratio is obtained. Further, in the case of the third speed, as shown in FIG. 3 (c), the sun gear 4b is fixed, the planetary gear 4c (carrier) is set to the drive side, and the ring gear 4a is set to the driven side, thereby obtaining a small reduction ratio. It is done. In the case of reverse, as shown in FIG. 3 (d), the sun gear 4b is driven, the planetary gear 4c (carrier) is fixed, and the ring gear 4a is driven, so that output is output with respect to the input. Can be reversed. In addition, the above shows an example of the operation of the planetary gear mechanism 4, and the operation is not necessarily limited to this operation.

図４は、本実施の形態のニードル軸受を遊星歯車機構に組み込んだ状態で示す図である。図４に示すように、ニードル軸受１０は、ピニオンシャフト（内輪）４ｅと遊星歯車（外輪）４ｃとの間に配置され、遊星歯車４ｃを回転自在に支持している。ニードル軸受１０は、複数のころ１１と、それらを保持する保持器１２とからなっている。ピニオンシャフト４ｅ内には、図４で右方から軸線に沿って延在し、一般的には中央で外周面もしくは内周面に抜ける油路４ｆが形成されている。保持器１２は外輪案内で用いられる。   FIG. 4 is a view showing the needle bearing of the present embodiment incorporated in a planetary gear mechanism. As shown in FIG. 4, the needle bearing 10 is disposed between a pinion shaft (inner ring) 4e and a planetary gear (outer ring) 4c, and rotatably supports the planetary gear 4c. The needle bearing 10 includes a plurality of rollers 11 and a cage 12 that holds them. In the pinion shaft 4e, there is formed an oil passage 4f extending along the axis from the right side in FIG. 4 and generally passing through the outer peripheral surface or the inner peripheral surface at the center. The cage 12 is used for outer ring guidance.

図５は、本実施の形態にかかるニードル軸受１０の斜視図である。図に示すように、保持器１２は、一対の環状部１２ａを複数の柱部１２ｂで連結した構成を有している。隣接する柱部１２ｂの間が、ころ１１を保持するポケットとなる。各柱部１２ｂは、軸線方向中央において縮径した（即ち保持器１２の軸線に近接した）中央部１２ｃを有しており、中央部１２ｃの軸線方向両側から環状部１２ａにかけて拡径している部位を、案内部１２ｅとしている。このような形状を有する保持器１２をＭ型保持器と呼ぶ。   FIG. 5 is a perspective view of the needle bearing 10 according to the present embodiment. As shown in the figure, the cage 12 has a configuration in which a pair of annular portions 12a are connected by a plurality of column portions 12b. A space for holding the rollers 11 is formed between the adjacent column portions 12b. Each column part 12b has a central part 12c that is reduced in diameter in the center in the axial direction (that is, close to the axial line of the cage 12), and the diameter is increased from both sides in the axial direction of the central part 12c to the annular part 12a. The part is a guide part 12e. The cage 12 having such a shape is called an M-type cage.

図６は、ニードル軸受１０の保持器１２の案内部１２ｅ周辺を拡大して示す図である。案内部１２ｅの一部には、半径方向にくぼんだ凹部１２ｄが形成され、かかる凹部１２ｄから周方向両側に延在するようにして張り出し部１２ｆが形成されている。   FIG. 6 is an enlarged view showing the periphery of the guide portion 12 e of the cage 12 of the needle bearing 10. A recessed portion 12d that is recessed in the radial direction is formed in a part of the guide portion 12e, and an overhang portion 12f is formed so as to extend from the recessed portion 12d to both sides in the circumferential direction.

図７は、本実施の形態にかかるニードル軸受１０を、保持器１２の凹部１２ｄの中央（例えば図６のVIII-VIII面）で軸線直交方向に切断して示す図であり、図８は、比較例にかかるニードル軸受１０’を、保持器１２’の凹部１２ｄ’の中央で軸線直交方向に切断して示す図である。尚、図７，８において、一点鎖線で示すころ１１は中立状態にあり、実線で示すころ１１は案内部１２ｅ、１２ｅ’に当接した状態にある。   FIG. 7 is a diagram showing the needle bearing 10 according to the present embodiment cut in the direction perpendicular to the axis at the center of the recess 12d of the cage 12 (for example, the VIII-VIII plane in FIG. 6). It is a figure which shows the needle bearing 10 'concerning a comparative example cut | disconnected in the direction orthogonal to an axis in the center of recessed part 12d' of holder | retainer 12 '. 7 and 8, the roller 11 indicated by the alternate long and short dash line is in a neutral state, and the roller 11 indicated by a solid line is in contact with the guide portions 12e and 12e '.

図７，８を比較すると明らかであるが、本実施の形態においてころ１１が案内部１２ｅに接触した場合におけるころ１１と張り出し部１２ｆの先端とのスキマａは、比較例においてころ１１が案内部１２ｅ’に接触した場合におけるころ１１と張り出し部１２ｆ’の先端とのスキマａ’に対し、ａ＞ａ’の関係になっているので、ころ１１と張り出し部１２ｆとが衝突しにくくなり、ラジアルニードル軸受の動作時において、張り出し部の破損を効果的に抑制できる。   7 and 8, it is clear that the clearance a between the roller 11 and the tip of the overhanging portion 12f when the roller 11 contacts the guide portion 12e in the present embodiment is that the roller 11 is the guide portion in the comparative example. With respect to the clearance a ′ between the roller 11 and the tip of the overhanging portion 12f ′ when in contact with 12e ′, the relationship a> a ′ is established, so that the roller 11 and the overhanging portion 12f are less likely to collide with each other. During the operation of the needle bearing, it is possible to effectively prevent the overhanging portion from being damaged.

このような特徴は、保持器１２の外径から凹部１２ｄまでの最大距離をΔとし、ニードル軸受１０のＰＣＤをＤとし、ころ１１の径をｄとしたときに、以下の式のいずれかを成立させることで得られる。
０．００５＜Δ／Ｄ＜０．０４４ （１）
０．０２５＜Δ／ｄ＜０．２ （２） Such a feature is that when the maximum distance from the outer diameter of the cage 12 to the recess 12d is Δ, the PCD of the needle bearing 10 is D, and the diameter of the roller 11 is d, It is obtained by establishing.
0.005 <Δ / D <0.044 (1)
0.025 <Δ / d <0.2 (2)

即ち、本実施の形態の保持器１２の場合、比較例の保持器１２’と比較すると、保持器１２の外径から凹部１２ｄまでの最大距離Δが小さくなっている。そのため、ころ１１と張り出し部１２ｆの先端とのスキマａを大きくすることができ、結果としてころ１１と張り出し部１２ｆとが衝突しにくくなるという効果がある。   That is, in the case of the cage 12 of the present embodiment, the maximum distance Δ from the outer diameter of the cage 12 to the recess 12d is smaller than that of the cage 12 'of the comparative example. Therefore, the clearance a between the roller 11 and the tip of the overhang portion 12f can be increased, and as a result, the roller 11 and the overhang portion 12f are less likely to collide.

しかるに、単に最大距離Δを小さくするのみでは、張り出し部１２ｆの張り出し量を稼げず、ころバレを防止できないか、或いは張り出し部１２ｆの肉厚を稼げず、その強度低下を招くという問題がある。そこで、本実施の形態では、案内部１２ｄの側面（周方向側面）を両側から絞り、半径方向外方に押し上げることで、張り出し部１２ｆの肉厚及び張り出し量を稼ぐようにしている。即ち、本実施の形態の案内部１２ｅの周方向幅Ｗは、比較例の案内部１２ｅ’の周方向幅Ｗ’より小さく（Ｗ＜Ｗ’）なっている。このような保持器は、以下の製造方法によって得られる。   However, simply reducing the maximum distance Δ cannot increase the amount of protrusion of the overhanging portion 12f and cannot prevent roller ballet, or cannot increase the thickness of the overhanging portion 12f, resulting in a decrease in strength. Therefore, in the present embodiment, the thickness and the amount of overhang of the overhanging portion 12f are earned by narrowing the side surface (circumferential side surface) of the guide portion 12d from both sides and pushing it up radially outward. That is, the circumferential width W of the guide portion 12e of the present embodiment is smaller than the circumferential width W 'of the guide portion 12e' of the comparative example (W <W '). Such a cage is obtained by the following manufacturing method.

図９は、保持器１２の製造工程を示すフローチャートである。図９において、ステップＳ１０１で、保持器の素材となる板材を所定の形状に打ち抜くピアス加工（工程）により、柱部１２ｂを形成した後、ステップＳ１０２で、張り出し部１２ｆの形成を行う（かかる張り出し部形成工程の詳細は後述する）。更に、ステップＳ１０３で、柱部１２ｂの中央を半径方向内方に曲げて、中央部１２ｃを形成する。その後、ステップＳ１０４で、板材を切断し、ステップＳ１０５で丸めて溶接した後、ステップＳ１０６で、バリ取りなど仕上げ加工を行って、保持器１２が完成する。   FIG. 9 is a flowchart showing a manufacturing process of the cage 12. In FIG. 9, in step S101, a pillar 12b is formed by piercing (step) in which a plate material used as a cage material is punched into a predetermined shape, and in step S102, an overhang 12f is formed (such overhang). Details of the part forming step will be described later). Further, in step S103, the center of the column part 12b is bent inward in the radial direction to form the center part 12c. Thereafter, in step S104, the plate material is cut, rounded and welded in step S105, and then finished in a step S106 such as deburring to complete the cage 12.

図１０は、本実施の形態にかかる保持器の製造工程の途中の状態（ステップＳ１０１，Ｓ１０２）を示す図であり、図１１は、比較例にかかる保持器の製造工程の同様に途中の状態を示す図である。図１０に示す右側の柱部１２ｂは、ピアス加工後の状態であり、その断面形状は図１１のＡＡで示され、図１０に示す左側の柱部１２ｂは、張り出し部形成後の状態であり、その断面形状は図１１のＢＢで示される。一方、図１１に示す右側の柱部１２ｂ’は、ピアス加工後の状態であり、その断面形状は図１３のＡＡ’で示され、図１１に示す左側の柱部１２ｂ’は、スカーフ形成後の状態であり、その断面形状は図１３のＢＢ’で示される。図１２，１３において、ハッチングで示す領域が、塑性変形により移動した部分となる。   FIG. 10 is a diagram illustrating a state in the middle of the manufacturing process of the cage according to the present embodiment (steps S101 and S102), and FIG. 11 is a state in the middle of the manufacturing process of the cage according to the comparative example. FIG. The right column 12b shown in FIG. 10 is in a state after piercing, and its cross-sectional shape is indicated by AA in FIG. 11, and the left column 12b shown in FIG. 10 is in a state after forming an overhanging portion. The sectional shape is indicated by BB in FIG. On the other hand, the right column portion 12b ′ shown in FIG. 11 is in a state after piercing, and its cross-sectional shape is indicated by AA ′ in FIG. 13, and the left column portion 12b ′ shown in FIG. The cross-sectional shape is indicated by BB ′ in FIG. In FIGS. 12 and 13, the hatched area is a portion moved by plastic deformation.

比較例の場合、図１３に示すように、上方（半径方向外方）からの押し込みのみで、張り出し部１２ｆ’の張り出し量を確保しなければならず、押し込み量Δが比較的大きくなる。これに対し、本実施の形態によれば、図１２に示すように、上方（半径方向外方）からの押し込みに加えて、案内部１２ｄの側面（周方向側面）を両側から絞り、半径方向外方に押し上げることで、押し込み量Δを小さく抑えながらも、張り出し部１２ｆの肉厚及び張り出し量を稼げるようにしている。   In the case of the comparative example, as shown in FIG. 13, the amount of protrusion of the overhanging portion 12 f ′ must be ensured only by pressing from above (radially outward), and the amount of pushing Δ becomes relatively large. On the other hand, according to the present embodiment, as shown in FIG. 12, in addition to pushing from above (radially outward), the side surface (circumferential side surface) of the guide portion 12d is squeezed from both sides to radially By pushing up outwardly, the thickness and the amount of overhang of the overhanging portion 12f can be increased while the amount of pushing Δ is kept small.

図１４は、本実施の形態にかかる保持器の張り出し部形成工程に用いる製造装置の断面図であり、図１５は、比較例にかかる保持器の張り出し部形成工程に用いる製造装置の断面図である。図１４において、製造装置は、第１の型であるバーニッシュパンチＢＰと、それと相対的に可動な第２の型であるスカーフパンチＳＰとを有している。   FIG. 14 is a cross-sectional view of the manufacturing apparatus used in the overhang portion forming process of the cage according to the present embodiment, and FIG. 15 is a cross-sectional view of the manufacturing apparatus used in the overhang portion forming process of the cage according to the comparative example. is there. In FIG. 14, the manufacturing apparatus includes a burnish punch BP that is a first mold and a scarf punch SP that is a second mold that is movable relative to the burnish punch BP.

バーニッシュパンチＢＰは、図で下方に向かうにつれて狭幅となるパンチ孔ＢＰａを有しており、スカーフパンチＳＰは、パンチ孔ＢＰａに対向する凸部ＳＰａを有している。ここで、パンチ孔ＢＰａの最小幅Ｗ１は、図１２に示す案内部１２ｅの幅Ｗ１に一致する。   The burnish punch BP has a punch hole BPa that becomes narrower as it goes downward in the figure, and the scarf punch SP has a convex portion SPa that faces the punch hole BPa. Here, the minimum width W1 of the punch hole BPa coincides with the width W1 of the guide portion 12e shown in FIG.

バーニッシュパンチＢＰと、スカーフパンチＳＰとの間に、保持器の素材Ｍを介在させ、両者を相対的に接近させると、図１４に示すように、パンチ孔ＢＰａによって案内部１２ｅの両側面が絞られ（すなわち、第１の方向へ押され）、当初の幅Ｗ２がＷ１に狭まり、それによって素材Ｍは上方へと押し出されるように塑性変形する。一方、スカーフパンチＳＰの凸部ＳＰａの（第２の方向への）押し込みで、凹部２ｄが形成されることとなるが、素材Ｍは側面からも押されているので、逃げ場を失った素材Ｍは、張り出し方向に大きく塑性変形することとなり、従って凸部ＳＰａの押し込み量Δは小さくても、張り出し部１２ｆの肉厚及び張り出し量を大きく確保できる。   When the material M of the cage is interposed between the burnish punch BP and the scarf punch SP and the two are brought relatively close to each other, as shown in FIG. It is squeezed (that is, pushed in the first direction), and the initial width W2 is narrowed to W1, whereby the material M is plastically deformed so as to be pushed upward. On the other hand, when the convex part SPa of the scarf punch SP is pushed (in the second direction), the concave part 2d is formed. However, since the material M is also pushed from the side, the material M that has lost its escape. Is greatly plastically deformed in the overhanging direction, and therefore, even if the pushing amount Δ of the convex portion SPa is small, it is possible to secure a large thickness and overhanging amount of the overhanging portion 12f.

また、案内部１２ｅの側面が絞られた結果、平面度が向上するので、ニードル軸受１０の動作時に、ころ１１が当接しても摩耗を抑制できる効果がある。尚、図１４に示すように、凸部ＳＰａの断面は、その下面において両側に向かうにつれ上昇するが直線的でない形状を有しており、張り出し部１２ｆの上面をそれに倣う形状とすることで、保持器１２の外径から半径方向外方へとはみ出ない張り出し部１２ｆを形成しやすいという利点がある。   Moreover, since the flatness is improved as a result of the side surface of the guide portion 12e being narrowed, there is an effect that wear can be suppressed even when the roller 11 comes into contact with the needle bearing 10 during operation. As shown in FIG. 14, the cross section of the convex portion SPa has a shape that rises toward both sides on its lower surface but is not linear, and the upper surface of the overhanging portion 12f has a shape that follows it. There is an advantage that it is easy to form an overhanging portion 12f that does not protrude radially outward from the outer diameter of the cage 12.

図１５より明らかであるが、比較例の場合には、バーニッシュパンチＢＰ’のパンチ孔ＰＢａ’に絞られないので保持器の素材Ｍの幅は狭くならず、張り出し部１２ｆの肉厚及び張り出し量を確保するためには、スカーフパンチＳＰ’の凸部ＳＰａ’の押し込み量Δを大きくせざるを得ず、その結果張り出し部１２ｆ’ところ１１とのスキマが小さくなる恐れがある（図８参照）。   As is clear from FIG. 15, in the case of the comparative example, the width of the material M of the cage is not narrowed because the punch hole PBa ′ of the burnish punch BP ′ is not narrowed, and the wall thickness and the overhang of the overhang portion 12f are not reduced. In order to secure the amount, the pressing amount Δ of the convex portion SPa ′ of the scarf punch SP ′ has to be increased, and as a result, the gap between the protruding portion 12f ′ and the area 11 may be reduced (see FIG. 8). ).

以上、本発明を実施の形態を参照して説明してきたが、本発明は上記実施の形態に限定されることなく、その発明の範囲内で変更・改良が可能であることはもちろんである。例えば、ニードル軸受は、自動車用の変速機に限らず、カークーラコンプレッサなど、各種の機械に適用できる。   The present invention has been described above with reference to the embodiments. However, the present invention is not limited to the above-described embodiments, and can of course be changed or improved within the scope of the invention. For example, the needle bearing can be applied not only to a transmission for an automobile but also to various machines such as a car cooler compressor.

本実施の形態にかかる針状ころ軸受を含む車両の自動変速機の断面図である。It is sectional drawing of the automatic transmission of the vehicle containing the needle roller bearing concerning this Embodiment. 遊星歯車機構４の分解図である。4 is an exploded view of the planetary gear mechanism 4. FIG. 遊星歯車機構の作動原理を示す図である。It is a figure which shows the operating principle of a planetary gear mechanism. 本実施の形態の針状ころ軸受を遊星歯車機構に組み込んだ状態で示す図である。It is a figure shown in the state where the needle roller bearing of this embodiment was built in the planetary gear mechanism. 本実施の形態にかかるニードル軸受１０の斜視図である。1 is a perspective view of a needle bearing 10 according to the present embodiment. ニードル軸受１０の保持器１２の案内部１２ｅ周辺を拡大して示す図である。It is a figure which expands and shows the guide part 12e periphery of the holder | retainer 12 of the needle bearing 10. FIG. 本実施の形態にかかるニードル軸受１０を、保持器１２の凹部１２ｄの中央で軸線直交方向に切断して示す図である。It is a figure which cuts and shows the needle bearing 10 concerning this Embodiment in the direction orthogonal to an axis in the center of the recessed part 12d of the holder | retainer 12. FIG. 比較例にかかるニードル軸受１０’を、保持器１２’の凹部１２ｄ’の中央で軸線直交方向に切断して示す図である。It is a figure which shows the needle bearing 10 'concerning a comparative example cut | disconnected in the direction orthogonal to an axis in the center of the recessed part 12d' of a holder | retainer 12 '. 保持器１２の製造工程を示すフローチャートである。3 is a flowchart showing a manufacturing process of the cage 12. 本実施の形態にかかる保持器の製造工程の途中の状態を示す図である。It is a figure which shows the state in the middle of the manufacturing process of the holder | retainer concerning this Embodiment. 比較例にかかる保持器の製造工程の同様に途中の状態を示す図である。It is a figure which shows the state in the middle of the manufacturing process of the holder | retainer concerning a comparative example similarly. 本実施の形態にかかる保持器の製造工程の途中の状態を示す図である。It is a figure which shows the state in the middle of the manufacturing process of the holder | retainer concerning this Embodiment. 比較例にかかる保持器の製造工程の同様に途中の状態を示す図である。It is a figure which shows the state in the middle of the manufacturing process of the holder | retainer concerning a comparative example similarly. 本実施の形態にかかる保持器の張り出し部形成工程に用いる製造装置の断面図である。It is sectional drawing of the manufacturing apparatus used for the overhang | projection part formation process of the holder | retainer concerning this Embodiment. 比較例にかかる保持器の張り出し部形成工程に用いる製造装置の断面図である。It is sectional drawing of the manufacturing apparatus used for the overhang | projection part formation process of the holder | retainer concerning a comparative example.

符号の説明Explanation of symbols

１ 自動変速機
４〜６ 遊星歯車機構
１０ 針状ころ軸受
１１ ころ
１２ 保持器
DESCRIPTION OF SYMBOLS 1 Automatic transmission 4-6 Planetary gear mechanism 10 Needle roller bearing 11 Roller 12 Cage

Claims (4)

一対の環状部と、前記環状部を連結する複数の柱部とからなり、ころを保持するニードル軸受用の保持器において、
前記保持器の柱部に凹部を形成することによって、ころバレ防止用の張り出し部を創成し、前記保持器の外径から前記凹部までの最大距離をΔとし、前記ニードル軸受のＰＣＤをＤとし、ころ径をｄとしたときに、以下の式のいずれかが成立することを特徴とするニードル軸受用の保持器。
０．００５＜Δ／Ｄ＜０．０４４ （１）
０．０２５＜Δ／ｄ＜０．２ （２） In a cage for a needle bearing that includes a pair of annular portions and a plurality of column portions that connect the annular portions, and holds the rollers,
By forming a concave portion in the retainer column portion, an overhang portion for preventing roller run-off is created, the maximum distance from the outer diameter of the retainer to the concave portion is Δ, and the PCD of the needle bearing is D. One of the following formulas is established when the roller diameter is d. A needle bearing retainer.
0.005 <Δ / D <0.044 (1)
0.025 <Δ / d <0.2 (2) 前記張り出し部は、前記保持器の外径より内方に位置することを特徴とする請求項１に記載のニードル軸受用の保持器。   2. The cage for a needle bearing according to claim 1, wherein the projecting portion is positioned inward from an outer diameter of the cage. 一対の環状部と、前記環状部を連結する複数の柱部とからなり、ころを保持するニードル軸受用の保持器の製造方法において、
板材を打ち抜くことによって前記柱部を形成するピアス工程と、
形成された柱部を、隣接する柱部側から第１の方向に押圧すると共に、前記第１の方向に対して交差する第２の方向に押圧することによって張り出し部を形成する張り出し部形成工程と、を有することを特徴とするニードル軸受用の保持器の製造方法。 In a method for manufacturing a cage for a needle bearing that includes a pair of annular portions and a plurality of column portions that connect the annular portions, and holds rollers,
A piercing step of forming the pillar portion by punching a plate material;
A projecting part forming step of forming the projecting part by pressing the formed pillar part in the first direction from the adjacent pillar part side and in the second direction intersecting the first direction. And a method for manufacturing a cage for a needle bearing. 前記張り出し部形成工程において、前記柱部の幅より狭い幅の第１の型に向かって、第２の型を用いて前記柱部を押し込むことを特徴とする請求項３に記載のニードル軸受用の保持器の製造方法。

4. The needle bearing according to claim 3, wherein, in the projecting portion forming step, the column portion is pushed in using a second die toward a first die having a width narrower than a width of the column portion. Method of manufacturing the cage.

JP2004312105A 2004-10-27 2004-10-27 Cage for needle bearing and its manufacturing method Pending JP2006125457A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012184852A (en) * 2005-12-14 2012-09-27 Nsk Ltd Pulley device with built-in one-way clutch
JP2012233507A (en) * 2011-04-28 2012-11-29 Toyota Boshoku Corp Rolling bearing, processing method of rolling bearing and processing device
EP2808569A1 (en) 2013-05-31 2014-12-03 NTN-SNR Roulements Making of protuberances for retaining rolling bodies of a rolling bearing cage
DE102014212270A1 (en) * 2014-06-26 2016-01-14 Schaeffler Technologies AG & Co. KG Cage for a rolling bearing, roller bearing and planetary gear bearing
DE102014214332A1 (en) * 2014-07-23 2016-01-28 Schaeffler Technologies AG & Co. KG Cage for a rolling bearing, roller bearing and planetary gear bearing

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012184852A (en) * 2005-12-14 2012-09-27 Nsk Ltd Pulley device with built-in one-way clutch
JP2012233507A (en) * 2011-04-28 2012-11-29 Toyota Boshoku Corp Rolling bearing, processing method of rolling bearing and processing device
US9587679B2 (en) 2011-04-28 2017-03-07 Toyota Boshoku Kabushiki Kaisha Method and apparatus for manufacturing rolling-element bearing
EP2808569A1 (en) 2013-05-31 2014-12-03 NTN-SNR Roulements Making of protuberances for retaining rolling bodies of a rolling bearing cage
DE102014212270A1 (en) * 2014-06-26 2016-01-14 Schaeffler Technologies AG & Co. KG Cage for a rolling bearing, roller bearing and planetary gear bearing
DE102014214332A1 (en) * 2014-07-23 2016-01-28 Schaeffler Technologies AG & Co. KG Cage for a rolling bearing, roller bearing and planetary gear bearing

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