JP2011231831A - Cage for radial needle bearing, and radial needle bearing - Google Patents

Cage for radial needle bearing, and radial needle bearing Download PDF

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Publication number
JP2011231831A
JP2011231831A JP2010101572A JP2010101572A JP2011231831A JP 2011231831 A JP2011231831 A JP 2011231831A JP 2010101572 A JP2010101572 A JP 2010101572A JP 2010101572 A JP2010101572 A JP 2010101572A JP 2011231831 A JP2011231831 A JP 2011231831A
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Prior art keywords
needle bearing
radial needle
cage
rim
radial
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JP2010101572A
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Japanese (ja)
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Hideo Nishizawa
英雄 西澤
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NSK Ltd
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NSK Ltd
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Priority to JP2010101572A priority Critical patent/JP2011231831A/en
Publication of JP2011231831A publication Critical patent/JP2011231831A/en
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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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • F16C33/546—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part with a M- or W-shaped cross section
    • 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
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F16C19/463—Needle bearings with one row or needles consisting of needle rollers held in a cage, i.e. subunit without race rings

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

Abstract

PROBLEM TO BE SOLVED: To provide a cage for a radial needle bearing improved in durability, and to provide the radial needle bearing with the cage.SOLUTION: This cage for the radial needle bearing includes a pair of rims arranged at both ends in the axial direction, and a plurality of columns intermittently arranged in the circumferential direction while the columns are bridged over between both rims, and is characterized in that a portion surrounded by the columns adjacent in the circumferential direction and both rims is made to serve as a pocket, the pocket rollingly holds needles, the thickness of the rim is made to be thinner than that of the column, and at least one portion of the rim is bent toward edge directions of the needles. Furthermore, the radial needle bearing includes the cage for the radial needle bearing, and a plurality of the needles which are rollingly held in the pocket.

Description

本発明は、ラジアルニードル軸受用保持器及びラジアルニードル軸受に関する。   The present invention relates to a radial needle bearing retainer and a radial needle bearing.

従来から自動車用変速機や各種機械装置の回転支持部のうち、大きなラジアル荷重が加わる部分にラジアルニードル軸受が組み込まれている。この自動車用変速機は、燃費向上やハイブリッド車に対応するため、高回転が求められている。このため、自動車用変速機を構成する遊星歯車機構に用いられるラジアルニードル軸受には高回転化の要求がある。   Conventionally, a radial needle bearing is incorporated in a portion to which a large radial load is applied in a rotation support portion of a transmission for an automobile or various mechanical devices. This automobile transmission is required to have a high rotation speed in order to improve fuel efficiency and cope with a hybrid vehicle. For this reason, the radial needle bearing used for the planetary gear mechanism that constitutes the automobile transmission has a demand for high rotation.

ここで、遊星歯車機構において、遊星ギヤは自転しながら太陽ギヤの周囲を公転しているが、このとき遊星ギヤを支持するラジアルニードル軸受も自転すると共に、太陽ギヤの周囲を公転するので、特に公転による遠心力がラジアルニードル軸受に付与されることとなる。そのため保持器に発生する応力が大きく、耐久性と強度が求められる。   Here, in the planetary gear mechanism, the planetary gear revolves around the sun gear while rotating, but at this time, the radial needle bearing supporting the planetary gear also rotates and revolves around the sun gear. Centrifugal force due to revolution is applied to the radial needle bearing. Therefore, the stress generated in the cage is large, and durability and strength are required.

この部分の改善の先行技術としては、例えば特許文献１がある。これは、ラジアルニードル軸受用保持器の側面を形成するリム部と、前記保持器のニードルを収容するポケットを形成する柱部と、の接続部分の内面側の曲率を大きくして、保持器の耐久性と強度を向上させている。   As a prior art for improving this part, there is, for example, Patent Document 1. This is because the curvature on the inner surface side of the connecting portion between the rim portion forming the side surface of the radial needle bearing retainer and the column portion forming the pocket for accommodating the needle of the retainer is increased. Durability and strength are improved.

特開平１１−１０１２４２号公報JP-A-11-101242

しかしながら、特許文献１に記載のラジアルニードル軸受の様に、接続部分の内面側の曲率を大きくすることのみでは、耐久性と強度を向上する点に関して、改善の余地がある。   However, like the radial needle bearing described in Patent Document 1, there is room for improvement in terms of improving durability and strength only by increasing the curvature on the inner surface side of the connecting portion.

本発明は、前述した課題に鑑みてなされたものであり、その目的は、耐久性を向上したラジアルニードル軸受用保持器及びラジアルニードル軸受を提供することにある。   The present invention has been made in view of the above-described problems, and an object thereof is to provide a radial needle bearing retainer and a radial needle bearing with improved durability.

前記課題を解決するため、本発明は次のような構成からなる。すなわち、本発明に係るラジアルニードル軸受用保持器は、軸方向両端部に設けられた１対のリム部と、これら両リム部同士の間に掛け渡された状態で周方向に間欠的に設けられた複数の柱部と、を備え、周方向で隣り合う前記柱部と前記両リム部とにより四辺を囲まれる部分をポケットとし、前記ポケットはニードルを転動自在に保持し、前記リム部の厚みは前記柱部よりも薄くし、前記リム部の少なくとも１箇所を前記ニードルの端面方向に曲げたことを特徴とする。また、ラジアルニードル軸受は、少なくとも、前記ラジアルニードル軸受用保持器と、前記ポケットに転動自在に保持する複数のニードルを備えることを特徴とする。   In order to solve the above problems, the present invention has the following configuration. That is, the radial needle bearing retainer according to the present invention is intermittently provided in the circumferential direction in a state of being spanned between a pair of rim portions provided at both ends in the axial direction. A plurality of pillar portions, and a portion surrounded by four sides by the pillar portions adjacent to each other in the circumferential direction and the rim portions as pockets, the pockets holding the needles in a freely rolling manner, and the rim portions Is made thinner than the column portion, and at least one portion of the rim portion is bent toward the end face of the needle. In addition, the radial needle bearing includes at least the radial needle bearing retainer and a plurality of needles that are rotatably held in the pocket.

本発明によれば、前記リム部や前記折り曲げ部が弾性変形にて振動や衝撃を吸収し易くしたので、ラジアルニードル軸受用保持器及びラジアルニードル軸受の耐久性を向上することが出来る。   According to the present invention, since the rim portion and the bent portion easily absorb vibration and impact by elastic deformation, the durability of the radial needle bearing retainer and the radial needle bearing can be improved.

本発明に係るラジアルニードル軸受用保持器の第１実施形態の斜視図The perspective view of 1st Embodiment of the radial needle bearing retainer which concerns on this invention. 本発明に係るラジアルニードル軸受用保持器の第１実施形態の断面図Sectional drawing of 1st Embodiment of the radial needle bearing retainer which concerns on this invention 本発明に係るラジアルニードル軸受用保持器の第２実施形態の断面図Sectional drawing of 2nd Embodiment of the radial needle bearing retainer which concerns on this invention 遊星歯車機構の図Illustration of planetary gear mechanism

以下、本発明に係るラジアルニードル軸受用保持器２とラジアルニードル軸受１の各実施形態について図面を参照して説明する。
＜第１実施形態＞
本実施形態のラジアルニードル軸受１は、例えば、自動車の自動変速装置を構成する遊星歯車機構に組み込まれて油潤滑で使用される。図４は、遊星歯車機構の分解斜視図である。遊星歯車機構４は、図４に示すように、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に噛合する例えば３つの遊星ギヤ（ピニオンギヤ）４ｃと、支持軸としての例えば３つのピニオンシャフト４ｅにより遊星ギヤ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ア４ｄとを有する。以下に詳述するラジアルニードル軸受は、ピニオンシャフト４ｅと遊星ギヤ４ｃとの間に配置される。 Hereinafter, each embodiment of the radial needle bearing retainer 2 and the radial needle bearing 1 according to the present invention will be described with reference to the drawings.
<First Embodiment>
The radial needle bearing 1 of the present embodiment is incorporated in a planetary gear mechanism that constitutes an automatic transmission device of an automobile, for example, and used for oil lubrication. FIG. 4 is an exploded perspective view of the planetary gear mechanism. As shown in FIG. 4, the planetary gear mechanism 4 includes a ring gear 4a having internal teeth, a sun gear 4b having external teeth, and, for example, three planetary gears (pinion gears) 4c that mesh with the ring gear 4a and the sun gear 4b. The planetary gear 4c is rotatably supported by, for example, three pinion shafts 4e serving as support shafts, and the carrier 4d is also rotatable. The radial needle bearing described in detail below is disposed between the pinion shaft 4e and the planetary gear 4c.

図２に示すように、ラジアルニードル軸受１は、周方向に所定の間隔で配置された複数のニードル３を転動自在に保持する保持器２と、を備えて構成されるケージアンドローラである。保持器２は、いわゆるＭ型保持器であって、軸方向に互いに間隔をあけて配置した、それぞれが円環状（円筒状又は円輪状）である１対のリム部２３と、複数本の柱部２１とを備える。これら各柱部２１は、円周方向に亙って間欠的に配置され、それぞれの両端部を上記両リム部２３の互いに対向する内側面の外径端部に連結させている。又、上記各柱部２１は、例えば、軸方向中間部が径方向内方に向け台形状に折れ曲がった形状を有する。そして、円周方向に隣り合うこれら各柱部２１の円周方向両側縁と上記両リム部２３の互いに対向する内側面とにより四辺を囲まれる空間部分を、それぞれ各ニードル３を転動自在に保持するためのポケット２２としている。   As shown in FIG. 2, the radial needle bearing 1 is a cage and roller that includes a cage 2 that holds a plurality of needles 3 that are arranged at predetermined intervals in the circumferential direction so as to be able to roll. . The retainer 2 is a so-called M-shaped retainer, and is arranged at intervals in the axial direction, each having a pair of rim portions 23 each having an annular shape (cylindrical or annular shape), and a plurality of columns. Part 21. Each of these column portions 21 is intermittently disposed in the circumferential direction, and both end portions thereof are connected to the outer diameter end portions of the inner side surfaces of the two rim portions 23 facing each other. Moreover, each said pillar part 21 has the shape where the axial direction intermediate part bent in the trapezoid shape toward radial inner direction, for example. Then, each needle 3 can be freely rolled in a space portion surrounded by four sides by the circumferential side edges of each of the column portions 21 adjacent in the circumferential direction and the inner side surfaces of the rim portions 23 facing each other. It is a pocket 22 for holding.

そして、ラジアルニードル軸受１は、上記ピニオンシャフト４ｅのピニオンシャフト外周面を内輪軌道とし、上記遊星ギヤ４ｃの遊星ギヤ内周面（ピニオンギヤ内周面）を外輪軌道として、上記各ニードル３の転動面を、これら内輪軌道及び外輪軌道に転がり接触させている。   Then, the radial needle bearing 1 uses the pinion shaft outer peripheral surface of the pinion shaft 4e as an inner ring raceway and the planetary gear inner peripheral surface (pinion gear inner peripheral surface) of the planetary gear 4c as an outer ring raceway. The surface is in rolling contact with the inner ring raceway and the outer ring raceway.

図２に示すように、ラジアルニードル軸受用保持器２の、前記リム部２３の厚みは前記柱部２１よりも薄くし、前記リム部２３の少なくとも１箇所を前記ニードルの端面３１の方向に曲げ、折り曲げ部２４を形成している。この様な構造にしているので、前記リム部２３や前記折り曲げ部２４が弾性変形にて振動や衝撃を吸収し易くし、保持器２の耐久性を向上することが出来る。図２に示すように、前記リム部２３において、前記柱部２１とは反対側の端部を前記ニードルの端面３１の方向に曲げることにより、前記折り曲げ部２４を形成している。また、前記折り曲げ部２４のニードル端面側２４ａか、ニードルの端面３１の、いずれか又は両方を曲面にすると、接触した場合でも点接触に近くなり、接触部をニードルの軸の中心に近くにできて、接触部同士の相対速度が小さくなるので、接触部の摩耗を抑制することが出来る。また、自転の抵抗となる摩擦力を低減し、軸受トルクの増大を防止できる。   As shown in FIG. 2, in the radial needle bearing retainer 2, the rim portion 23 is thinner than the column portion 21, and at least one portion of the rim portion 23 is bent toward the end surface 31 of the needle. The bent portion 24 is formed. With such a structure, the rim portion 23 and the bent portion 24 can easily absorb vibration and impact by elastic deformation, and the durability of the cage 2 can be improved. As shown in FIG. 2, the bent portion 24 is formed by bending the end portion of the rim portion 23 opposite to the column portion 21 in the direction of the end surface 31 of the needle. In addition, if either or both of the needle end surface 24a of the bent portion 24 and the needle end surface 31 are curved, the contact portion is close to point contact even when contacted, and the contact portion can be close to the center of the needle axis. In addition, since the relative speed between the contact portions is reduced, wear of the contact portions can be suppressed. Further, it is possible to reduce the frictional force that becomes the resistance to rotation and prevent the bearing torque from increasing.

また好ましくは、前記折り曲げ部２４と前記リム部の間の空間２５に、図示しないＣ型の止め輪を取り付けると、保持器２の半径方向の剛性や強度を向上させることが出来る。   Preferably, if a C-shaped retaining ring (not shown) is attached to the space 25 between the bent portion 24 and the rim portion, the rigidity and strength of the cage 2 in the radial direction can be improved.

＜第２実施形態＞
次に、図３を参照して第２の実施形態について説明する。なお、第１実施形態と同一又は同等部分には同一符号を付して説明を簡略化又は省略する。図３の保持器２´の折り曲げ部２６は、図２の折り曲げ部２４より先端部の長さを短くし、折り曲げる部分を小さくしている。また、前記折り曲げ部２６のニードル端面側２６ａも、第１実施形態のニードル端面側２４ａより長さが短くなっている。図３の保持器２´は、この様な形状により、折り曲げ部２６を、より形成し易くしている。その他の構成は、第１実施形態と同一であり、本実施形態においても、第１の実施形態と同様の効果を有する。 Second Embodiment
Next, a second embodiment will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent, and description is abbreviate | omitted or abbreviate | omitted. The bending portion 26 of the cage 2 'shown in FIG. 3 has a shorter tip than the bending portion 24 shown in FIG. Further, the needle end surface side 26a of the bent portion 26 is also shorter than the needle end surface side 24a of the first embodiment. The cage 2 ′ shown in FIG. 3 makes it easier to form the bent portion 26 by such a shape. Other configurations are the same as those of the first embodiment, and this embodiment has the same effects as those of the first embodiment.

以上の様に、本発明のラジアルニードル軸受用保持器及びラジアルニードル軸受は、耐久性を向上出来る。
なお、上述の実施形態は本発明の一例を示したものであって、本発明はこれらの実施形態に限定されるものではない。本発明の主旨を外れない限り、他の実施形態にも適用出来る。 As described above, the radial needle bearing retainer and the radial needle bearing of the present invention can improve durability.
The above-described embodiment shows an example of the present invention, and the present invention is not limited to these embodiments. As long as the gist of the present invention is not deviated, the present invention can be applied to other embodiments.

１ ニードル軸受
２ 第１実施形態のニードル軸受用保持器
２´ 第２実施形態のニードル軸受用保持器
３ ニードル
４ 遊星歯車機構
４ａ リングギヤ
４ｂ 外歯を有する太陽ギヤ
４ｃ ピニオンギヤ
４ｄ キャリア
４ｅ ピニオンシャフト
２１ 柱部
２２ ポケット
２３ リム部
２４ 第１実施形態の折り曲げ部
２４ａ 第１実施形態の折り曲げ部のニードル端面側
２５ 折り曲げ部とリム部の間の空間
２６ 第２実施形態の折り曲げ部
２６ａ 第２実施形態の折り曲げ部のニードル端面側
３１ ニードルの端面 DESCRIPTION OF SYMBOLS 1 Needle bearing 2 Needle bearing cage 2 'of 1st Embodiment Needle bearing cage 3' of 2nd Embodiment Needle 4 Planetary gear mechanism 4a Ring gear 4b Sun gear 4c with external teeth 4c Pinion gear 4d Carrier 4e Pinion shaft 21 Column Portion 22 pocket 23 rim portion 24 bent portion 24a of the first embodiment needle end surface side 25 of the bent portion of the first embodiment space 26 between the bent portion and the rim portion bent portion 26a of the second embodiment of the second embodiment Needle end face side of the bent part 31 Needle end face

Claims (2)

ラジアルニードル軸受用保持器において、軸方向両端部に設けられた１対のリム部と、これら両リム部同士の間に掛け渡された状態で周方向に間欠的に設けられた複数の柱部とを備え、周方向で隣り合う前記柱部と前記両リム部とにより四辺を囲まれる部分をポケットとし、前記ポケットはニードルを転動自在に保持し、前記リム部の厚みは前記柱部よりも薄くし、前記リム部を前記ニードルの端面方向に曲げたことを特徴とするラジアルニードル軸受用保持器。 In a radial needle bearing retainer, a pair of rim portions provided at both end portions in the axial direction and a plurality of column portions provided intermittently in the circumferential direction in a state of being spanned between the two rim portions. A portion surrounded by four sides by the column portion adjacent in the circumferential direction and the both rim portions as a pocket, the pocket holds the needle so that it can roll, and the thickness of the rim portion is larger than that of the column portion. A radial needle bearing retainer, wherein the rim portion is bent in the direction of the end face of the needle. ラジアルニードル軸受において、少なくとも、請求項１のラジアルニードル軸受用保持器と、前記ポケットに転動自在に保持する複数のニードルを備えることを特徴とするラジアルニードル軸受。 A radial needle bearing, comprising: a radial needle bearing retainer according to claim 1; and a plurality of needles that are rotatably held in the pocket.
JP2010101572A 2010-04-27 2010-04-27 Cage for radial needle bearing, and radial needle bearing Pending JP2011231831A (en)

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Application Number Priority Date Filing Date Title
JP2010101572A JP2011231831A (en) 2010-04-27 2010-04-27 Cage for radial needle bearing, and radial needle bearing

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JP2010101572A JP2011231831A (en) 2010-04-27 2010-04-27 Cage for radial needle bearing, and radial needle bearing

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106246728A (en) * 2015-06-09 2016-12-21 斯凯孚公司 Radial direction retainer for high rotating speed bearing
US9593714B1 (en) * 2015-10-15 2017-03-14 Schaeffler Technologies AG & Co. KG Axial bearing cage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106246728A (en) * 2015-06-09 2016-12-21 斯凯孚公司 Radial direction retainer for high rotating speed bearing
CN106246728B (en) * 2015-06-09 2021-05-18 斯凯孚公司 Radial cage for high speed bearings
US9593714B1 (en) * 2015-10-15 2017-03-14 Schaeffler Technologies AG & Co. KG Axial bearing cage

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