JP2007057045A - Synthetic resin cage for tapered roller bearing - Google Patents

Synthetic resin cage for tapered roller bearing Download PDF

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Publication number
JP2007057045A
JP2007057045A JP2005244860A JP2005244860A JP2007057045A JP 2007057045 A JP2007057045 A JP 2007057045A JP 2005244860 A JP2005244860 A JP 2005244860A JP 2005244860 A JP2005244860 A JP 2005244860A JP 2007057045 A JP2007057045 A JP 2007057045A
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Prior art keywords
side annular
diameter
synthetic resin
annular portion
tapered roller
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JP2005244860A
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Japanese (ja)
Inventor
Takanori Yamada
孝則 山田
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NSK Ltd
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NSK Ltd
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Priority to JP2005244860A priority Critical patent/JP2007057045A/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
    • 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
    • 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
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4623—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/4635—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages
    • 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
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • 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
    • F16C33/56—Selection of substances
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
    • F16C2208/04—Glass fibres
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned

Abstract

<P>PROBLEM TO BE SOLVED: To keep satisfactory incorporating performance even when the blending amount of glass fiber is 20 wt.% or more. <P>SOLUTION: This cage 1 is composed of: a small diameter-side annular portion 2; a large diameter-side annular portion 3; pole portions 4 connecting both annular portions 2, 3; and a pocket portion 5 of tapered rollers formed by an inner face of the small diameter-side annular portion 2, an inner face of the large diameter-side annular portion 3 and inner faces of two pole portions 4, 4. An approximately circular arc-shaped recessed portion 10 is formed between the pole portions 4, 4 on an outer diameter face of the small diameter-side annular portion 2. The approximately circular arc-shaped recessed portion 10 is formed by a R-shaped cutout formed on the outer diameter face of the small diameter-side annular portion 2 expanded by elastic deformation in the circumferential direction in being incorporated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、比較的高い保持器の強度と寸法安定性を必要とする円錐ころ軸受用合成樹脂製保持器に関する。   The present invention relates to a synthetic resin cage for tapered roller bearings that requires relatively high cage strength and dimensional stability.

従来、円錐ころ軸受用合成樹脂製保持器としては、特許文献１には、円錐ころ軸受用合成樹脂製保持器におけるガラス繊維の配合量に対する内輪の組込み成功率が示されている。   Conventionally, as a synthetic resin cage for a tapered roller bearing, Patent Document 1 discloses a success rate of incorporating an inner ring with respect to a blending amount of glass fibers in a synthetic resin cage for a tapered roller bearing.

その構成は、図３に示すような保持器の形態であり、そのガラス繊維の配合量が２０ｗｔ％までは、良好な組込み性を示す。   The structure is in the form of a cage as shown in FIG. 3, and good incorporation is exhibited up to 20 wt% of the glass fiber.

図３は、従来例に係る円錐ころ軸受用合成樹脂製保持器の斜視図である。   FIG. 3 is a perspective view of a synthetic resin cage for tapered roller bearings according to a conventional example.

保持器１は、合成樹脂により成形してあり、小径側円環部２と、大径側円環部３と、これら両円環部２，３を連結する柱部４と、小径側円環部２の内面、大径側円環部３の内面、及び２つの柱部４，４の内面により形成した円錐ころのポケット部５と、から構成してある。   The cage 1 is formed of a synthetic resin, and includes a small-diameter-side annular portion 2, a large-diameter-side annular portion 3, a column portion 4 that connects both the annular portions 2 and 3, and a small-diameter-side annular ring. The inner surface of the portion 2, the inner surface of the large-diameter side annular portion 3, and the pocket portion 5 of the tapered roller formed by the inner surfaces of the two pillar portions 4, 4.

また、特許文献２の開示では、合成樹脂製保持器は、ポリアミド６、ポリアミド６６、ポリアミド４６、ポリフェニレンサルファイド、ポリエーテル・エーテルケトン等の熱可塑性合成樹脂を母材とし、強度向上及び寸法安定化の為に、ガラス繊維を１０〜４０重量％程度添加したものを、射出成形により一体成形して成る。但し、用途により、合成樹脂製保持器に更なる強度向上と耐摩耗性を要求する場合には、カーボン繊維を１５〜３０％添加しても良い。
特開２００１−３１７５５４号公報（図１３、図１４） 特開２００５−６１４８３号公報（段落番号［００１８］の記載） In addition, in the disclosure of Patent Document 2, the synthetic resin cage is made of a thermoplastic synthetic resin such as polyamide 6, polyamide 66, polyamide 46, polyphenylene sulfide, polyether ether ketone, etc. as a base material to improve strength and to stabilize dimensions. For this purpose, a glass fiber added with about 10 to 40% by weight is integrally formed by injection molding. However, depending on the application, when a further strength improvement and wear resistance are required for the synthetic resin cage, 15 to 30% of carbon fiber may be added.
JP 2001-317554 A (FIGS. 13 and 14) JP-A-2005-61483 (Description of paragraph number [0018])

しかしながら、強度向上及び寸法安定化の為に、ガラス繊維配合量を２０ｗｔ％以上とした場合には、その組込み性が低下し、最悪の場合には、保持器の破損を引き起こすといった問題がある。   However, when the glass fiber content is 20 wt% or more for strength improvement and dimensional stabilization, there is a problem that the assembling property is lowered, and in the worst case, the cage is broken.

本発明は、上述したような事情に鑑みてなされたものであって、そのガラス繊維配合量が２０ｗｔ％以上であっても、良好な組込み性を維持することができる、円錐ころ軸受用合成樹脂製保持器を提供することを目的とする。   The present invention has been made in view of the circumstances as described above, and can maintain good assemblability even when the glass fiber content is 20 wt% or more. Synthetic resin for tapered roller bearings An object is to provide a cage made of metal.

上記の目的を達成するため、本発明に係る円錐ころ軸受用合成樹脂製保持器は、合成樹脂により成形してあり、小径側円環部と、大径側円環部と、これら両円環部を連結する柱部と、小径側円環部の内面、大径側円環部の内面、及び２つの柱部の内面により形成した円錐ころのポケット部と、からなる円錐ころ軸受用合成樹脂製保持器に於いて、
前記小径側円環部の外径面に、略円弧状凹部が形成してあることを特徴とする。 In order to achieve the above object, a synthetic resin cage for tapered roller bearings according to the present invention is formed of a synthetic resin, and includes a small-diameter side annular portion, a large-diameter side annular portion, and both of these annular rings. Synthetic resin for a tapered roller bearing comprising: a column portion connecting the portions; an inner surface of the small-diameter side annular portion; an inner surface of the large-diameter-side annular portion; and a pocket portion of the tapered roller formed by the inner surfaces of the two column portions. In the cage made of
A substantially arc-shaped concave portion is formed on the outer diameter surface of the small-diameter side annular portion.

本発明によれば、そのガラス繊維配合量が２０ｗｔ％以上であっても、良好な組込み性を維持することができる。   According to the present invention, good incorporation can be maintained even when the glass fiber content is 20 wt% or more.

以下、本発明の実施の形態に係る円錐ころ軸受用合成樹脂製保持器を図面を参照しつつ説明する。   Hereinafter, a synthetic resin cage for tapered roller bearings according to an embodiment of the present invention will be described with reference to the drawings.

図１は、本発明の実施の形態に係る円錐ころ軸受用合成樹脂製保持器の斜視図である。   FIG. 1 is a perspective view of a synthetic resin cage for tapered roller bearings according to an embodiment of the present invention.

図２（ａ）は、本発明の実施の形態に係る円錐ころ軸受用合成樹脂製保持器の部分的斜視図であり、（ｂ）は、従来例に係る円錐ころ軸受用合成樹脂製保持器の部分的斜視図である。   FIG. 2A is a partial perspective view of a synthetic resin cage for a tapered roller bearing according to an embodiment of the present invention, and FIG. 2B is a synthetic resin cage for a tapered roller bearing according to a conventional example. FIG.

保持器１は、合成樹脂により成形してあり、そのガラス繊維配合量が少なくとも２０ｗｔ％以上である。   The cage 1 is formed of a synthetic resin, and the glass fiber content is at least 20 wt%.

保持器１は、小径側円環部２と、大径側円環部３と、これら両円環部２，３を連結する柱部４と、小径側円環部２の内面、大径側円環部３の内面、及び２つの柱部４，４の内面により形成した円錐ころのポケット部５と、から構成してある。   The cage 1 includes a small-diameter-side annular portion 2, a large-diameter-side annular portion 3, a column portion 4 that connects both the annular portions 2 and 3, the inner surface of the small-diameter-side annular portion 2, and the large-diameter side. It comprises a pocket portion 5 of a tapered roller formed by the inner surface of the annular portion 3 and the inner surfaces of the two column portions 4 and 4.

さて、本実施の形態では、小径側円環部２の外径面であって、柱部４，４の間にあたる箇所に、略円弧状凹部１０が形成してある。   Now, in the present embodiment, a substantially arc-shaped recess 10 is formed at a location corresponding to the outer diameter surface of the small-diameter side annular portion 2 and between the column portions 4 and 4.

この略円弧状凹部１０は、組込みの際に円周方向に弾性変形によって広げられる小径側円環部２の外径面に施したＲ形状の抜きである。   The substantially arc-shaped concave portion 10 is an R-shaped punch provided on the outer diameter surface of the small-diameter side annular portion 2 that is widened by elastic deformation in the circumferential direction when assembled.

このような略円弧状凹部１０（Ｒ形状の抜き）を設けることによって、小径側円環部２と柱部４を連結する小径側隅Ｒ部（図２の符号Ａ）に発生する応力集中を低減することができ、したがって、そのガラス繊維配合量が２０ｗｔ％以上であっても、良好な組込み性を維持することができる。   By providing such a substantially arc-shaped concave portion 10 (R-shaped punch), stress concentration generated in the small-diameter side corner R portion (reference A in FIG. 2) that connects the small-diameter side annular portion 2 and the column portion 4 is reduced. Therefore, even if the glass fiber content is 20 wt% or more, good assemblability can be maintained.

すなわち、本実施の形態では、小径側円環部２の剛性を下げて、その弾性変形を容易にしている。   In other words, in the present embodiment, the rigidity of the small-diameter side annular portion 2 is lowered to facilitate its elastic deformation.

以上から、全体の剛性バランスが良くなり、組込み時の変形によって発生する応力集中を低減できる効果を有する。   From the above, the overall rigidity balance is improved, and there is an effect of reducing stress concentration caused by deformation at the time of assembly.

また、応力集中の低減は、使用中の振動による保持器１の破損防止に対しても効果的である。   Further, the reduction of stress concentration is effective for preventing breakage of the cage 1 due to vibration during use.

さらに、小径側円環部２の外径面に略円弧状凹部１０（Ｒ形状の抜き）が形成してある場合、表１のＦＥＭ解析結果に示すように、発生応力を比較すると、柱部４の同じ位置に、同じ荷重を負荷させた場合、発生応力は、小さくなる傾向にあり、このことは、組込み性の向上に効果がある。   Further, when a substantially arc-shaped recess 10 (R-shaped punch) is formed on the outer diameter surface of the small-diameter side annular portion 2, as shown in the FEM analysis result of Table 1, when the generated stress is compared, the column portion When the same load is applied to the same position of 4, the generated stress tends to be small, which is effective for improving the assemblability.

Figure 2007057045
なお、表１は、小径側円環部２と柱部４とを連結する小径側隅Ｒ部（図２の符号Ａ）に発生する応力を比較したものであり、参考のため、大径側隅Ｒ部の応力も示す。
Figure 2007057045
 Table 1 compares the stresses generated in the small-diameter-side corner R portion (reference A in FIG. 2) connecting the small-diameter-side annular portion 2 and the column portion 4, and the large-diameter side is for reference. The stress at the corner R is also shown.

また、表１では、一定荷重を柱部４に作用させた場合の応力比で、従来例形状の小径側を１とした。   Further, in Table 1, the stress ratio when a constant load is applied to the column part 4 is set to 1 on the small diameter side of the conventional shape.

なお、本発明は、上述した実施の形態に限定されず、種々変形可能である。   In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible.

本発明の実施の形態に係る円錐ころ軸受用合成樹脂製保持器の斜視図である。It is a perspective view of the synthetic resin cage for tapered roller bearings concerning an embodiment of the invention. （ａ）は、本発明の実施の形態に係る円錐ころ軸受用合成樹脂製保持器の部分的斜視図であり、（ｂ）は、従来例に係る円錐ころ軸受用合成樹脂製保持器の部分的斜視図である。(A) is a partial perspective view of a synthetic resin cage for tapered roller bearings according to an embodiment of the present invention, and (b) is a portion of a synthetic resin cage for tapered roller bearings according to a conventional example. FIG. 従来例に係る円錐ころ軸受用合成樹脂製保持器の斜視図である。It is a perspective view of the synthetic resin cage for tapered roller bearings concerning a conventional example.

符号の説明Explanation of symbols

１ 保持器
２ 小径側円環部
３ 大径側円環部
４ 柱部
５ ポケット部
１０ 略円弧状凹部 DESCRIPTION OF SYMBOLS 1 Cage 2 Small diameter side ring part 3 Large diameter side ring part 4 Pillar part 5 Pocket part 10 Substantially arc-shaped recessed part

Claims (1)

合成樹脂により成形してあり、小径側円環部と、大径側円環部と、これら両円環部を連結する柱部と、小径側円環部の内面、大径側円環部の内面、及び２つの柱部の内面により形成した円錐ころのポケット部と、からなる円錐ころ軸受用合成樹脂製保持器に於いて、
前記小径側円環部の外径面に、略円弧状凹部が形成してあることを特徴とする円錐ころ軸受用合成樹脂製保持器。 Molded with synthetic resin, small-diameter side annular part, large-diameter-side annular part, column part connecting these two annular parts, inner surface of small-diameter-side annular part, large-diameter-side annular part In a synthetic resin cage for a tapered roller bearing, comprising a pocket portion of a tapered roller formed by an inner surface and inner surfaces of two pillar portions,
A synthetic resin cage for a tapered roller bearing, wherein a substantially arc-shaped recess is formed on an outer diameter surface of the small-diameter side annular portion.
JP2005244860A 2005-08-25 2005-08-25 Synthetic resin cage for tapered roller bearing Withdrawn JP2007057045A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101292857B1 (en) * 2008-07-08 2013-08-07 닛본 세이고 가부시끼가이샤 Resin retainer for tapered roller bearing, and tapered roller bearing
EP2963307A1 (en) * 2014-07-02 2016-01-06 NTN-SNR Roulements Cage for retaining rolling bodies in a roller bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101292857B1 (en) * 2008-07-08 2013-08-07 닛본 세이고 가부시끼가이샤 Resin retainer for tapered roller bearing, and tapered roller bearing
US9039288B2 (en) 2008-07-08 2015-05-26 Nsk Ltd. Tapered roller bearing resin cage and tapered roller bearing
EP2963307A1 (en) * 2014-07-02 2016-01-06 NTN-SNR Roulements Cage for retaining rolling bodies in a roller bearing
FR3023334A1 (en) * 2014-07-02 2016-01-08 Ntn Snr Roulements CAGE FOR RETENTION OF ROLLING BODIES IN A BEARING BEARING

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