JP4424092B2 - Synthetic resin crown cage - Google Patents

Synthetic resin crown cage Download PDF

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JP4424092B2
JP4424092B2 JP2004189453A JP2004189453A JP4424092B2 JP 4424092 B2 JP4424092 B2 JP 4424092B2 JP 2004189453 A JP2004189453 A JP 2004189453A JP 2004189453 A JP2004189453 A JP 2004189453A JP 4424092 B2 JP4424092 B2 JP 4424092B2
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partition
crown
ball
pocket
shaped cage
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JP2006009988A (en
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陽三 谷口
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JTEKT Corp
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JTEKT Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/38Ball cages
    • F16C33/41Ball cages comb-shaped
    • F16C33/412Massive or moulded comb cages, e.g. snap ball cages
    • F16C33/414Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
    • F16C33/416Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb cages
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/38Ball cages
    • F16C33/41Ball cages comb-shaped
    • F16C33/418Details of individual pockets, e.g. shape or ball retaining means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40Linear dimensions, e.g. length, radius, thickness, gap
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00Application independent of particular apparatuses
    • F16C2300/20Application independent of particular apparatuses related to type of movement
    • F16C2300/22High-speed rotation

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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、玉軸受に用いられる合成樹脂製の冠形保持器に関する。   The present invention relates to a synthetic resin crown-shaped cage used for ball bearings.

従来の玉軸受に用いる合成樹脂製の冠形保持器は、環状母体の円周数箇所に軸方向一方に突出する仕切り部を設けかつ各仕切り部の間に径方向から見て略C字形の玉収容用のポケットを有する構成である(例えば特許文献1参照。)。ポケットは、径方向ならびに軸方向一方へ向けて開放されている。仕切り部の内側面、つまりポケットを構成する内壁面は、球面形状になっている。この冠形保持器では、通常、玉軸受の玉から外れにくくするために、各仕切り部の先端側を玉に回り込ませるようにしている。   Synthetic resin crown-shaped cages used for conventional ball bearings are provided with partition portions protruding in one axial direction at circumferential positions of the annular base body, and are substantially C-shaped when viewed from the radial direction between the partition portions. It is the structure which has a pocket for ball accommodation (for example, refer to patent documents 1). The pocket is opened toward one of the radial direction and the axial direction. The inner surface of the partition part, that is, the inner wall surface constituting the pocket has a spherical shape. In this crown-shaped cage, in order to make it difficult to come off from the ball of the ball bearing, the tip side of each partition portion is usually wrapped around the ball.

上記従来の冠形保持器は、例えば玉軸受に使用している状態で、高速回転に伴い回転遠心力が増大すると、各仕切り部が径方向斜め外向きに弾性変形しやすくなるため、各仕切り部の内径側角部が玉の自転速度の速い部分に干渉して、早期に摩耗しやすくなる。
実開平5−34317号
In the state where the conventional crown-shaped cage is used for, for example, a ball bearing, when the rotational centrifugal force increases with high-speed rotation, each partition portion is easily elastically deformed radially outward. The inner diameter side corner of the part interferes with the fast rotating part of the ball and is likely to wear out early.
Japanese Utility Model Publication No. 5-34317

本発明は、合成樹脂製の冠形保持器において、玉軸受に使用している状況で、高速回転時に玉軸受から外れにくくした構成を継承しながら、耐摩耗性の向上を図ることを解決すべき課題としている。   The present invention solves the problem of improving wear resistance in a crown-shaped cage made of a synthetic resin while inheriting a configuration in which it is difficult to come off from a ball bearing during high-speed rotation in a situation where it is used for a ball bearing. It should be a challenge.

本発明の合成樹脂製の冠形保持器は、環状母体の円周数箇所に軸方向一方に突出する仕切り部を設けかつ各仕切り部の間に径方向から見てC字形の玉収容用のポケットを有し、回転に伴い前記仕切り部の先端側が拡径して前記仕切り部が径方向斜め外向きに弾性変形するもので、前記各ポケットを構成する内壁面の径方向に沿う形状を球面とし、かつ、前記内壁面の内径側角部に、玉の自転速度の最も速い部分との干渉を避ける凹部を設け、前記凹部は、前記内壁面の内径側角部において各ポケットの中心から軸方向両方に設けられ、前記ポケットの中心から軸方向一方である前記仕切り部の先端側に形成される前記凹部の軸方向長さが、前記ポケットの中心から軸方向他方である前記仕切り部の付け根側に形成される前記凹部の軸方向長さよりも長く形成されるとともに、前記凹部よりも前記軸方向一方側にある内径側角部が前記玉の自転速度の前記最も速い部分より遅い部分と当接するように形成されたことを特徴としている。 The crown-shaped cage made of the synthetic resin of the present invention is provided with a partition portion protruding in one axial direction at a circumferential portion of the annular base body, and for accommodating a C-shaped ball as viewed from the radial direction between the partition portions. It has a pocket, the tip end side of the partition part expands with rotation, and the partition part elastically deforms radially outward in the radial direction, and the shape along the radial direction of the inner wall surface constituting each pocket is a spherical surface. In addition, a recess that avoids interference with a portion having the fastest rotation speed of the ball is provided at the inner diameter side corner of the inner wall surface, and the recess is pivoted from the center of each pocket at the inner diameter side corner of the inner wall surface. The axial length of the concave portion provided on both ends in the axial direction from the center of the pocket and formed on the distal end side of the partition portion is axially the other side in the axial direction from the center of the pocket. Axial length of the recess formed on the side The inner diameter side corner on one side in the axial direction with respect to the recess is formed so as to be in contact with a portion slower than the fastest portion of the ball rotation speed. .

本発明によると、玉軸受に使用している状態において、回転遠心力の増大に伴い各仕切り部が径方向斜め外向きに弾性変形した場合に、ポケットを構成する内壁面(仕切り部の内側面)の内径側角部が玉に当接する領域が減る。そのため、摩擦抵抗を軽減できて、摩耗する部分も減らすことができる。特に、凹部を設けている領域が玉の自転速度の速い部分に該当し、この玉の自転速度の速い部分に前記内壁面の内径側角部が当接せずに済むから、摩耗を抑制するうえで有利となる。このように冠形保持器のポケットを構成する内壁面と玉とを干渉させにくくしているものの、ポケットを径方向から見て略C字形としていて前記内壁面の先端側の内径側角部が玉に回り込んだ状態で当接するので、冠形保持器が玉軸受から外れることを抑制または防止できる。しかも、この玉に当接する部分つまり前記内壁面の先端側の内径側角部は、玉の自転速度の遅い領域が当接しているので、この当接部分の摩耗は抑制される。   According to the present invention, when each partition portion is elastically deformed obliquely outward in the radial direction as the rotational centrifugal force increases in the state of being used for the ball bearing, the inner wall surface (the inner surface of the partition portion) ), The area where the inner diameter side corners abut the balls is reduced. Therefore, the frictional resistance can be reduced, and the worn part can also be reduced. In particular, the region where the recess is provided corresponds to a portion where the rotational speed of the ball is fast, and the inner diameter side corner portion of the inner wall surface does not need to come into contact with the fast rotational portion of the ball, thereby suppressing wear. This is advantageous. In this way, although the inner wall surface constituting the pocket of the crown-shaped cage and the ball are less likely to interfere with each other, the pocket is substantially C-shaped when viewed from the radial direction, and the inner diameter side corner on the tip side of the inner wall surface is Since it abuts in a state of being wrapped around the ball, it is possible to suppress or prevent the crown-shaped cage from being detached from the ball bearing. In addition, since the region where the ball rotates slowly is in contact with the portion that contacts the ball, that is, the inner diameter side corner on the tip side of the inner wall surface, wear of the contact portion is suppressed.

好ましくは、前記凹部は、前記仕切り部の内径面における円周方向全長にわたって溝状に設けられたものとすることができる。 Preferably, the concave portion may be provided in a groove shape over the entire length in the circumferential direction on the inner diameter surface of the partition portion.

本発明の合成樹脂製の冠形保持器によると、玉軸受に使用する状況での回転遠心力によって玉軸受から外れにくくしたうえで耐摩耗性の向上を図ることができる。   According to the crown-shaped cage made of the synthetic resin of the present invention, it is possible to improve wear resistance while making it difficult to disengage from the ball bearing by the rotational centrifugal force in the situation where it is used for the ball bearing.

以下、本発明の最良の実施形態を図面に基づいて説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the drawings.

まず、図5および図6を参照して、合成樹脂製の冠形保持器の使用対象となる深溝玉軸受を説明する。図5は、図1の冠形保持器を用いた深溝玉軸受を一部切欠いて示す斜視図、図6は、図5の深溝玉軸受の断面図である。   First, with reference to FIG. 5 and FIG. 6, the deep groove ball bearing used as the use object of the synthetic resin crown-shaped cage is demonstrated. 5 is a perspective view of the deep groove ball bearing using the crown-shaped cage of FIG. 1 with a part cut away, and FIG. 6 is a cross-sectional view of the deep groove ball bearing of FIG.

深溝玉軸受は、外輪1と内輪2との対向間に多数の玉3を介装し、この多数の玉3を冠形保持器4で円周方向略等間隔に保持させた構成である。冠形保持器4は玉3が転がることによって回転案内される玉案内形式とされている。   The deep groove ball bearing has a configuration in which a large number of balls 3 are interposed between the outer ring 1 and the inner ring 2 facing each other, and the large number of balls 3 are held at substantially equal intervals in the circumferential direction by a crown-shaped cage 4. The crown-shaped cage 4 is a ball guide type in which the ball 3 is rotated and guided by rolling.

なお、外輪1、内輪2、玉3は、例えば軸受鋼、浸炭鋼等の金属で形成される。冠形保持器4は、例えばポリエチレン、ポリアミド、ポリアセタール、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリカーボネート、ポリフェニレンサルファイド、ポリエーテルサルフォン、ポリエーテルイミド、ポリアミドイミド、ポリエーテルエーテルケトン、熱可塑性ポリイミド、熱硬化性ポリイミド、エポキシ樹脂、フェノール樹脂等の合成樹脂で形成される。   In addition, the outer ring | wheel 1, the inner ring | wheel 2, and the ball | bowl 3 are formed with metals, such as bearing steel and carburized steel, for example. The crown cage 4 is, for example, polyethylene, polyamide, polyacetal, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyphenylene sulfide, polyethersulfone, polyetherimide, polyamideimide, polyetheretherketone, thermoplastic polyimide, thermosetting. It is formed of a synthetic resin such as polyimide, epoxy resin, or phenol resin.

図1から図4を参照して、冠形保持器4を詳細に説明する。図1は、冠形保持器の最良の実施形態を示す斜視図、図2は、図1の冠形保持器の一部を展開して径方向から見た図、図3は、図1の冠形保持器の断面図、図4は、図2の(4)−(4)線断面の矢視図である。 The crown retainer 4 will be described in detail with reference to FIGS. FIG. 1 is a perspective view showing the best embodiment of the crown-shaped cage, FIG. 2 is a diagram of a part of the crown-shaped cage of FIG. 1 developed from the radial direction, and FIG. sectional view of the snap cage, Fig. 4, in FIG. 2 (4) - (4) line is an arrow cross-sectional view.

冠形保持器4は、合成樹脂を成形して製作されるものであり、環状母体5の円周ほぼ等配の数箇所に、玉3を嵌入保持するポケット6が設けられている。このポケット6は、径方向から見て略C字形状になっており、径方向ならびに軸方向一方へ向けて開放されている。   The crown-shaped cage 4 is manufactured by molding a synthetic resin, and pockets 6 for inserting and holding the balls 3 are provided at several locations on the annular base body 5 at almost equal intervals. The pocket 6 is substantially C-shaped when viewed from the radial direction, and is open toward one of the radial direction and the axial direction.

環状母体5の円周数箇所に軸方向一方に突出する仕切り部7が設けられており、各仕切り部7の間にポケット6が存在している。この仕切り部7の先端側には、凹み8が設けられており、この凹み8によって各仕切り部7の先端側に二股の抜け止め部7aが存在している。ポケット6は、環状母体5側に設けられる略半円形の半円部9と、抜け止め部7a側に設けられる曲面部10,10とで囲まれて形成されている。凹み8には、グリース等の潤滑剤が貯溜される。   Partition portions 7 that protrude in one axial direction are provided at circumferential positions of the annular base body 5, and pockets 6 exist between the partition portions 7. A recess 8 is provided on the distal end side of the partition portion 7, and a bifurcated retaining portion 7 a exists on the distal end side of each partition portion 7 due to the recess 8. The pocket 6 is formed by being surrounded by a substantially semicircular semicircular portion 9 provided on the annular mother body 5 side and curved surface portions 10 and 10 provided on the retaining portion 7a side. A lubricant such as grease is stored in the recess 8.

ここで、各ポケット6を構成する内壁面(各仕切り部7の内側面)の径方向に沿う形状を球面とする。そして、前記内壁面(各仕切り部7の内側面)の内径側角部において玉3の自転速度の速い部分との干渉を避ける凹部11を設けている。具体的に、凹部11は、前記内壁面(各仕切り部7の内側面)の内径側角部において各ポケット6の中心Pから軸方向両方へ所定量w1,w2広げた範囲に該当する領域RBに設けられている。この実施形態では、凹部11を、各仕切り部7の内径面における円周方向全長にわたって溝状に設けている。   Here, let the shape along the radial direction of the inner wall surface (inner side surface of each partition part 7) which comprises each pocket 6 be a spherical surface. And the recessed part 11 which avoids interference with the part with the high rotational speed of the ball | bowl 3 in the internal diameter side corner | angular part of the said inner wall surface (inner side surface of each partition part 7) is provided. Specifically, the concave portion 11 is a region RB corresponding to a range in which a predetermined amount w1, w2 is expanded in the axial direction from the center P of each pocket 6 at the inner diameter side corner portion of the inner wall surface (inner side surface of each partition portion 7). Is provided. In this embodiment, the recessed part 11 is provided in groove shape over the circumferential direction full length in the internal diameter surface of each partition part 7. FIG.

なお、図5および図6に示す深溝玉軸受において、玉3が自転および公転するとき、図3に示すように、玉3の外表面において玉3の中心を通る放射方向線Lと交差する点X1,X2での自転速度が最も速くなり、玉3の外表面において玉3の中心を通る軸方向線Sと交差する点X3,X4での自転速度はゼロとなる。玉3の中心はポケット中心Pと一致させている。玉3において点X1,X2から点X3,X4に近づく位置ほど自転速度は遅い。玉3の自転速度が最も速い部分は冠形保持器4の各仕切り部7の内側面においてポケット6の中心Pあるいはその付近に対応する位置に当接する。但し、冠形保持器4の各仕切り部7の内側面と玉3の外表面との間には軸方向ならびに円周方向に所定のすきまを持たせている関係より、冠形保持器4が回転動作時に軸方向に前記すきま分だけずれることがあるので、玉3の自転速度が最も速い部分が各仕切り部7の内側面においてポケット6の中心Pに相当する位置から軸方向にずれることがある。   In the deep groove ball bearing shown in FIGS. 5 and 6, when the ball 3 rotates and revolves, as shown in FIG. 3, the point intersecting the radial line L passing through the center of the ball 3 on the outer surface of the ball 3. The rotation speed at X1 and X2 is the fastest, and the rotation speed at points X3 and X4 intersecting the axial line S passing through the center of the ball 3 on the outer surface of the ball 3 is zero. The center of the ball 3 is matched with the pocket center P. In the ball 3, the rotation speed is slower as the position approaches the points X3, X4 from the points X1, X2. The portion with the fastest rotation speed of the ball 3 abuts on the inner surface of each partition 7 of the crown-shaped cage 4 at a position corresponding to the center P of the pocket 6 or the vicinity thereof. However, the crown-shaped cage 4 has a predetermined clearance in the axial direction and the circumferential direction between the inner surface of each partition 7 of the crown-shaped cage 4 and the outer surface of the ball 3. Since there is a deviation in the axial direction in the axial direction during the rotation operation, the portion where the rotation speed of the ball 3 is the fastest may be shifted in the axial direction from the position corresponding to the center P of the pocket 6 on the inner surface of each partition portion 7. is there.

この凹部11の形成位置および軸方向幅RBは、以下で説明する知見に基づいて決定した。   The formation position of the recess 11 and the axial width RB were determined based on the knowledge described below.

一般的に、冠形保持器4では、図8の(a),(b),(c)に示すように、回転速度が上昇するに従い、各仕切り部7の弾性変形量が大きくなるとともに、各仕切り部7の内径側角部と玉3との間の径方向でのすきまが詰まり、各仕切り部7と玉3との干渉領域が拡大する。図8には、凹部11を設けていない従来例の冠形保持器を用いた結果を示している。つまり、低速回転域では、図8(a)に示すように、各仕切り部7の中心Pより先端側が玉3に僅かに干渉する。中速回転域では、図8(b)に示すように、各仕切り部7の中心Pより先端側が玉3に所定の幅をもって干渉する。高速回転域では、図8(c)に示すように、各仕切り部7の中心Pを挟む先端側と付け根側とが所定の幅をもって干渉する。このように、低速回転時には各仕切り部7の中心Pよりも先端側で玉3に干渉しているが、高速回転になるに従い各仕切り部7の中心Pを挟む先端側と付け根側とに跨る広範囲の領域が干渉することになる。この高速回転時の干渉領域を考慮して、凹部11の形成位置および軸方向幅RBを特定している。   In general, as shown in FIGS. 8A, 8B, and 8C, in the crown-shaped cage 4, as the rotational speed increases, the amount of elastic deformation of each partition 7 increases. The gap in the radial direction between the inner diameter side corner of each partition 7 and the ball 3 is clogged, and the interference area between each partition 7 and the ball 3 is expanded. FIG. 8 shows a result of using a conventional crown-shaped cage in which the concave portion 11 is not provided. That is, in the low speed rotation region, as shown in FIG. 8A, the tip side slightly interferes with the ball 3 from the center P of each partition portion 7. In the medium speed rotation region, as shown in FIG. 8B, the tip side from the center P of each partition portion 7 interferes with the ball 3 with a predetermined width. In the high-speed rotation region, as shown in FIG. 8C, the tip side and the base side sandwiching the center P of each partition 7 interfere with each other with a predetermined width. As described above, at the time of low speed rotation, the ball 3 interferes with the ball 3 on the tip side from the center P of each partition portion 7, but straddles the tip side and the base side sandwiching the center P of each partition portion 7 as the rotation speed increases. A wide area will interfere. The formation position of the recess 11 and the axial width RB are specified in consideration of the interference area during high-speed rotation.

このような冠形保持器4では、深溝玉軸受に使用している状態において、回転遠心力の増大に伴い各仕切り部7が径方向斜め外向きに弾性変形するが、その場合に、各仕切り部7の内径側角部が玉3に当接する領域を減らすことができる。そのため、摩擦抵抗を軽減できて、摩耗する部分も減らすことができる。   In such a crown-shaped cage 4, in a state where it is used for a deep groove ball bearing, each partition portion 7 is elastically deformed radially outward in accordance with an increase in rotational centrifugal force. The area where the inner diameter side corner of the portion 7 contacts the ball 3 can be reduced. Therefore, the frictional resistance can be reduced, and the worn part can also be reduced.

図7を参照して、上記冠形保持器4を用いる場合の動作を説明する。   With reference to FIG. 7, the operation in the case of using the crown-shaped cage 4 will be described.

冠形保持器4を図5や図6に示すように深溝玉軸受に組み込んだ状態とする。この冠形保持器4は玉案内形式になっているため、基本的に回転動作中には冠形保持器4は外輪1や内輪2に対して当接しないようになっているが、玉3が転がることによって冠形保持器4のポケット6を構成する内壁面に必ず当接する。   The crown-shaped cage 4 is in a state of being incorporated in a deep groove ball bearing as shown in FIGS. Since the crown-shaped cage 4 is in the form of a ball guide, the crown-shaped cage 4 is basically not in contact with the outer ring 1 or the inner ring 2 during the rotation operation. Rolls in contact with the inner wall surface forming the pocket 6 of the crown-shaped cage 4.

ここで、高速回転になるに従い、図7に示すように、冠形保持器4の各仕切り部7が径方向斜め外向きに弾性変形すると、径方向斜め外向きに弾性変形した各仕切り部7の先端側の内径側角部が玉3に干渉する可能性があるものの、凹部11の存在によって玉3の自転速度の速い部分に当接せずに済む。このように、冠形保持器4のポケット6を構成する内壁面と玉3との干渉部分を減らしているものの、ポケット6を径方向から見て略C字形としていて各仕切り部7の先端側の内径側角部が玉3に回り込んだ状態で当接するようになっているので、冠形保持器4が深溝玉軸受から外れることを抑制または防止できるようになる。しかも、この各仕切り部7において玉3に当接する部分つまり各仕切り部7の先端側の内径側角部に対して玉3の自転速度の遅い領域が当接するので、この当接部分の摩耗は抑制される。   Here, as the rotation speed increases, as shown in FIG. 7, when each partition portion 7 of the crown-shaped cage 4 is elastically deformed radially diagonally outward, each partition portion 7 elastically deformed radially diagonally outward. Although there is a possibility that the inner diameter side corner on the tip side of the ball may interfere with the ball 3, the presence of the recess 11 prevents the ball 3 from coming into contact with the portion having a high rotation speed. Thus, although the interference part of the inner wall surface which comprises the pocket 6 of the crown shape holder | retainer 4 and the ball 3 is reduced, the pocket 6 is made into a substantially C shape seeing from radial direction, and the front end side of each partition part 7 Since the inner diameter-side corners of the ball are in contact with the balls 3, the crown-shaped cage 4 can be prevented or prevented from coming off from the deep groove ball bearing. In addition, since a region where the rotation speed of the ball 3 is slow contacts the portion of each partition portion 7 that contacts the ball 3, that is, the inner diameter side corner portion on the tip side of each partition portion 7, the wear of this contact portion is reduced. It is suppressed.

以上説明したように、本発明の冠形保持器4は、回転遠心力が増大する高速回転での使用においても早期の摩耗を抑制できるようになり、深溝玉軸受の転がり特性ならびに寿命の向上に貢献できる。   As described above, the crown-shaped cage 4 of the present invention can suppress early wear even when used at a high speed rotation in which the rotational centrifugal force increases, thereby improving the rolling characteristics and life of the deep groove ball bearing. Can contribute.

以下、本発明の他の実施形態を説明する。   Hereinafter, other embodiments of the present invention will be described.

上記実施形態では、冠形保持器4の各仕切り部7の内径側角部に設ける凹部11を各仕切り部7の内径面における円周方向全長に設けたが、例えば図9および図10に示すように、部分的に設けることができる。図9では、凹部11を各仕切り部7の円周方向両側の内径側角部のみを凹ませるようにして設けている。図10では、凹部11を部分的に凹ませて設けるのであるが、テーパ形状にしている。   In the above embodiment, the recess 11 provided in the inner diameter side corner of each partition 7 of the crown-shaped cage 4 is provided in the entire length in the circumferential direction on the inner diameter surface of each partition 7, but for example, as shown in FIGS. As such, it can be partially provided. In FIG. 9, the recesses 11 are provided so as to be recessed only at the inner diameter side corners on both sides in the circumferential direction of the partition portions 7. In FIG. 10, the recess 11 is provided by being partially recessed, but has a tapered shape.

本発明に係る冠形保持器の最良の実施形態を示す斜視図The perspective view which shows the best embodiment of the crown shaped holder | retainer based on this invention 図1の冠形保持器の一部を展開して径方向から見た図Fig. 1 shows a part of the crown-shaped cage in Fig. 1 as seen from the radial direction. 図1の冠形保持器の断面図Sectional view of the crown-shaped cage of FIG. 図2の(4)−(4)線断面の矢視図 FIG. 2 (4)-(4) sectional view taken along the line 図1の冠形保持器を用いた深溝玉軸受を一部切欠いて示す斜視図1 is a perspective view showing a deep groove ball bearing using the crown-shaped cage of FIG. 図4の深溝玉軸受の断面図Sectional view of the deep groove ball bearing of FIG. 図5の深溝玉軸受で不具合が生じないことを説明する図The figure explaining that a trouble does not arise in the deep groove ball bearing of FIG. 図5の深溝玉軸受で冠形保持器の弾性変形量や玉との干渉領域を説明する図FIG. 5 is a diagram for explaining the amount of elastic deformation of the crown-shaped cage and the interference area with the ball in the deep groove ball bearing of FIG. 本発明に係る冠形保持器の他の実施形態で、図4に対応する図FIG. 4 is a view corresponding to FIG. 4 in another embodiment of the crown-shaped cage according to the present invention. 本発明に係る冠形保持器のさらに他の実施形態で、図4に対応する図FIG. 4 is a view corresponding to FIG. 4 in still another embodiment of a crown-shaped cage according to the present invention.

符号の説明Explanation of symbols

3…玉
4…冠形保持器
5…環状母体
6…ポケット
7…仕切り部
11…凹部
3 ... ball 4 ... crown cage 5 ... annular base 6 ... pocket 7 ... partition 11 ... concave

Claims (2)

環状母体の円周数箇所に軸方向一方に突出する仕切り部を設けかつ各仕切り部の間に径方向から見てC字形の玉収容用のポケットを有し、回転に伴い前記仕切り部の先端側が拡径して前記仕切り部が径方向斜め外向きに弾性変形する合成樹脂製の冠形保持器であって、
前記各ポケットを構成する内壁面の径方向に沿う形状を球面とし、
かつ、前記内壁面の内径側角部に、玉の自転速度の最も速い部分との干渉を避ける凹部を設け、
前記凹部は、前記内壁面の内径側角部において各ポケットの中心から軸方向両方に設けられ、
前記ポケットの中心から軸方向一方である前記仕切り部の先端側に形成される前記凹部の軸方向長さが、前記ポケットの中心から軸方向他方である前記仕切り部の付け根側に形成される前記凹部の軸方向長さよりも長く形成されるとともに、前記凹部よりも前記軸方向一方側にある内径側角部が前記玉の自転速度の前記最も速い部分より遅い部分と当接するように形成されたことを特徴とする合成樹脂製の冠形保持器。
A partition portion protruding in one axial direction is provided at a number of circumferences of the annular base body, and a C-shaped ball receiving pocket is provided between the partition portions when viewed from the radial direction. A crown-shaped cage made of a synthetic resin whose side is expanded in diameter and elastically deformed radially outward in the partition part,
The shape along the radial direction of the inner wall surface constituting each pocket is a spherical surface,
And, in the inner diameter side corner of the inner wall surface, provided with a recess to avoid interference with the fastest part of the ball rotation speed,
The recess is provided both axially from the center of each pocket at the inner diameter side corner of the inner wall surface,
The axial length of the concave portion formed on the distal end side of the partition portion which is one axial direction from the center of the pocket is formed on the base side of the partition portion which is the other axial direction from the center of the pocket. It is formed longer than the axial length of the concave portion, and is formed so that the inner diameter side corner portion on the one axial side of the concave portion is in contact with a portion slower than the fastest portion of the ball rotation speed. This is a crown-shaped cage made of synthetic resin.
前記凹部は、前記仕切り部の内径面における円周方向全長にわたって溝状に設けられることを特徴とする請求項1に記載の合成樹脂製の冠形保持器。   The said recessed part is provided in groove shape over the circumferential direction full length in the internal diameter surface of the said partition part, The synthetic resin crown-shaped cage | capacitor of Claim 1 characterized by the above-mentioned.
JP2004189453A 2004-06-28 2004-06-28 Synthetic resin crown cage Expired - Fee Related JP4424092B2 (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
US10570961B2 (en) 2015-03-11 2020-02-25 Ntn Corporation Retainer for bearing and bearing

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* Cited by examiner, † Cited by third party
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US8104971B2 (en) * 2007-08-28 2012-01-31 Jtekt Corporation Resin cage for ball bearing
CN106104033B (en) * 2014-03-20 2019-01-11 Ntn株式会社 rolling bearing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10570961B2 (en) 2015-03-11 2020-02-25 Ntn Corporation Retainer for bearing and bearing

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