JP2006017179A - Synthetic resin snap cage and deep groove ball bearing - Google Patents

Synthetic resin snap cage and deep groove ball bearing Download PDF

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JP2006017179A
JP2006017179A JP2004193907A JP2004193907A JP2006017179A JP 2006017179 A JP2006017179 A JP 2006017179A JP 2004193907 A JP2004193907 A JP 2004193907A JP 2004193907 A JP2004193907 A JP 2004193907A JP 2006017179 A JP2006017179 A JP 2006017179A
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crown
shaped cage
ball bearing
deep groove
synthetic resin
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Japanese (ja)
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Yozo Taniguchi
陽三 谷口
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • F16C33/418—Details of individual pockets, e.g. shape or ball 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
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
    • F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
    • F16C33/416—Massive 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
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a snap cage which does not easily come off from a deep groove ball bearing during rotation. <P>SOLUTION: This snap cage 4 is made of synthetic resin and is provided with a dividing part 7 projecting in one side of axial direction at several portions of circumference of an annular base body 5 and with a pocket 6 for storing a ball between the dividing part. A radially inward bulge part 11 to enlarge dimension for holding the ball 3 is provided on an inner diameter side of the dividing part 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、合成樹脂製の冠形保持器およびそれを用いた深溝玉軸受に関する。   The present invention relates to a synthetic resin crown-shaped cage and a deep groove ball bearing using the same.

従来の深溝玉軸受は、外輪と内輪との対向間に多数の玉を介装し、これら多数の玉を保持器で円周方向略等間隔に保持させた構成である。この保持器として、例えば合成樹脂製の冠形保持器を用いることがある。内輪はその外周面の軸方向中間に軌道溝を設け、この軌道溝の軸方向両肩部を平坦面にしている。   A conventional deep groove ball bearing has a configuration in which a large number of balls are interposed between an outer ring and an inner ring facing each other, and the large number of balls are held at substantially equal intervals in the circumferential direction by a cage. For example, a synthetic resin crown-shaped cage may be used as this cage. The inner ring is provided with a raceway groove in the middle of the outer circumferential surface in the axial direction, and both shoulders in the axial direction of the raceway groove are flat.

合成樹脂製の冠形保持器は、環状母体の円周複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、当該冠形保持器を深溝玉軸受の玉から外れにくくするために、各仕切り部の軸方向一方側に突出する先端側を玉の軸方向に沿う外周面の広域に回り込ませるようにしている。冠形保持器の環状母体から各仕切り部に至るまで径方向の肉厚を略均一にしており、この径方向肉厚も軽量化のために可及的に薄くしている。   A synthetic resin crown-shaped cage is provided with partition portions protruding in one axial direction at a plurality of locations around the circumference of the annular mother body, and a substantially C-shaped pocket for accommodating balls as viewed from the radial direction between the partition portions. It is the structure which has (for example, refer patent document 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 prevent the crown-shaped cage from being easily detached from the ball of the deep groove ball bearing, the front end side projecting to one side in the axial direction of each partition portion is usually formed on the outer circumferential surface along the axial direction of the ball. I try to wrap around a wide area. The thickness in the radial direction from the annular base of the crown-shaped cage to each partition is made substantially uniform, and this radial thickness is also made as thin as possible for weight reduction.

上記従来の冠形保持器は、例えば深溝玉軸受に使用している状態で、高速回転時に、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、深溝玉軸受から外れやすい。
特開平１１−１９３８２１号 The conventional crown-shaped cage is, for example, used in a deep groove ball bearing, so that each partition portion is easily elastically deformed radially outward in a high-speed rotation, so that it is easily detached from the deep groove ball bearing.
Japanese Patent Laid-Open No. 11-193821

本発明は、合成樹脂製の冠形保持器を、例えば深溝玉軸受に使用する場合に、回転中に当該深溝玉軸受から外れにくくすることを解決すべき課題としている。   This invention makes it the problem which should be solved to make it difficult to remove | deviate from the said deep groove ball bearing during rotation, when using the crown type cage made from a synthetic resin, for example for a deep groove ball bearing.

（１）本発明による合成樹脂製の冠形保持器は、環状母体の円周複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間に玉収容用のポケットを設けた合成樹脂製の冠形保持器であって、上記仕切り部の内径側に、上記玉の抱き代を大きくする径方向内向きの膨出部を設けたことを特徴とするものである。この膨出の形態には、仕切り部の内径側全体を径方向内向きに膨出する形態だけでなく、仕切り部の内径側をその円周方向両側それぞれの内側面近傍においてのみ径方向内向きに膨出する形態も含む。  (1) A synthetic resin crown-shaped cage according to the present invention is a synthetic resin in which a partition portion protruding in one axial direction is provided at a plurality of circumferential locations on an annular base body, and pockets for receiving balls are provided between the partition portions. A crown-shaped cage made of metal, characterized in that a radially inwardly bulging portion that increases the holding allowance of the ball is provided on the inner diameter side of the partition portion. In this form of bulging, not only the form in which the entire inner diameter side of the partition part bulges inward in the radial direction but also the inner diameter side of the partition part is directed inward in the radial direction only in the vicinity of the inner side surfaces of both sides in the circumferential direction. Also includes a form that bulges.

本発明の冠形保持器によると、合成樹脂製であるために、深溝玉軸受に使用している状態において、高速回転になって回転遠心力が増大するに従い、各仕切り部が径方向斜め外向きに弾性変形してきても、仕切り部の内側面を径方向内向きに膨出して玉の抱き代を大きくしてあるから、当該冠形保持器が回転中に深溝玉軸受から外れにくい。   According to the crown-shaped cage of the present invention, since it is made of a synthetic resin, each partition portion is obliquely outward in the radial direction as the rotational centrifugal force increases in a state where it is used for a deep groove ball bearing. Even if it is elastically deformed in the direction, the inner side surface of the partition portion bulges inward in the radial direction to increase the ball holding allowance, so that the crown-shaped cage is not easily detached from the deep groove ball bearing during rotation.

本発明の好ましい態様として、上記膨出部を上記仕切り部の内径側の全体に設けて当該仕切り部の径方向肉厚を上記環状母体の径方向肉厚よりも大きくすることができる。この態様の場合では、冠形保持器が合成樹脂製であっても、仕切り部の強度が、その膨出部によって大きく向上しているから、深溝玉軸受に使用している状態において、高速回転になって回転遠心力が増大しても、従来の冠形保持器のように環状母体の径方向厚みと仕切り部の径方向厚みとを同一にしている場合に比べて弾性変形しにくく、保持器強度が向上する。したがって、冠形保持器が回転中に深溝玉軸受から外れにくい構成に加えて、保持器強度が大きく向上して耐久性が高いものとなる。   As a preferred embodiment of the present invention, the bulging portion can be provided on the entire inner diameter side of the partition portion so that the radial thickness of the partition portion can be made larger than the radial thickness of the annular matrix. In the case of this aspect, even if the crown-shaped cage is made of a synthetic resin, the strength of the partition portion is greatly improved by the bulging portion. Even if the rotational centrifugal force increases, it is less likely to be elastically deformed and retained compared to the case where the radial thickness of the annular base and the radial thickness of the partition are the same as in the conventional crown-shaped cage. The vessel strength is improved. Therefore, in addition to the configuration in which the crown-shaped cage is not easily detached from the deep groove ball bearing during rotation, the cage strength is greatly improved and durability is increased.

（２）本発明による深溝玉軸受は、外輪と、内輪と、両輪間に介装した複数の玉と、上記玉を円周方向略等間隔に保持する冠形保持器とを備える深溝玉軸受であって、その冠形保持器として上記（１）の冠形保持器を用いるとともに、かつ、内輪の軌道溝の一方肩部に、当該軌道溝の開口側外径より小さくした小径案内面を設けたことを特徴とするものである。  (2) A deep groove ball bearing according to the present invention includes an outer ring, an inner ring, a plurality of balls interposed between the two rings, and a crown-shaped cage that holds the balls at substantially equal intervals in the circumferential direction. The crown-shaped cage of the above (1) is used as the crown-shaped cage, and a small-diameter guide surface that is smaller than the outer diameter of the track groove on the opening side is provided on one shoulder of the track groove of the inner ring. It is characterized by providing.

本発明の深溝玉軸受によると、上記外れにくい冠形保持器を用いるから、この冠形保持器が玉の挙動を阻害しにくくなる。これにより、玉の転がり動作が安定し、軸受性能が向上することに加えて、内輪の軌道溝の一方肩部側から冠形保持器を組み込むときの作業が簡単に行えるようになる等、組み込み性が向上した玉軸受の構造を提供できる。   According to the deep groove ball bearing of the present invention, since the crown-shaped cage that does not easily come off is used, the crown-shaped cage does not easily disturb the behavior of the ball. As a result, the ball rolling operation is stabilized and the bearing performance is improved. In addition, the work when installing the crown-shaped cage from the one shoulder side of the inner ring raceway groove can be performed easily. A ball bearing structure with improved performance can be provided.

本発明によると、合成樹脂製の冠形保持器が回転中に深溝玉軸受から外れにくくできる。   According to the present invention, the crown-shaped cage made of a synthetic resin can be hardly detached from the deep groove ball bearing during rotation.

以下、本発明の最良の実施形態を、添付した図面に基づいて説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying 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、両輪１，２の対向間に介装した多数の玉３と、これら多数の玉３を円周方向略等間隔に保持する冠形保持器４とを備えた構成である。   The deep groove ball bearing includes an outer ring 1, an inner ring 2, a large number of balls 3 interposed between the opposed rings 1 and 2, and a crown-shaped cage 4 that holds the large number of balls 3 at substantially equal intervals in the circumferential direction. It is the structure provided with.

外輪１と、内輪２と、玉３は、いずれも、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、樹脂、好ましくは、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。   The outer ring 1, the inner ring 2 and the ball 3 are all formed of a metal such as bearing steel or carburized steel. The crown-shaped cage 4 is a resin, preferably, for example, polyethylene, polyamide, polyacetal, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyphenylene sulfide, polyethersulfone, polyetherimide, polyamideimide, polyetheretherketone, thermoplastic It is formed of a synthetic resin such as polyimide, thermosetting 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の冠形保持器をその一部を展開して径方向から見た状態で示す図、図３は、図１の冠形保持器をその断面で示す図、図４は、図２の（４）−（４）線に沿う断面を矢視方向から見た状態で示す図である。   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 showing the crown-shaped cage of FIG. FIG. 4 is a view showing the crown-shaped cage of FIG. 1 in its cross section, and FIG. 4 is a view showing a cross section taken along line (4)-(4) of FIG.

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の円周ほぼ等配の複数箇所に、玉３を嵌入保持するポケット６を備えている。このポケット６は、径方向ならびに軸方向一方へ向けて開放している。   The crown-shaped cage 4 is manufactured by molding a synthetic resin, and includes pockets 6 in which the balls 3 are fitted and held at a plurality of locations on the annular base 5 that are substantially equally spaced around the circumference. The pocket 6 is open toward one of the radial direction and the axial direction.

環状母体５の円周複数箇所に軸方向一方に向けて突出する仕切り部７を設けており、各仕切り部７の円周方向で対向する内側面間にポケット６が存在している。この仕切り部７の軸方向一方に向けて突出する先端側に、軸方向他方に向けて凹んだ凹み８を設け、この凹み８によって各仕切り部７の先端側に円周方向に当該凹み８を間にした二股の抜け止め部７ａを構成している。ポケット６は、環状母体５側に形成した略半円弧形状の半円弧部９と、抜け止め部７ａ側に形成した部分円弧部１０，１０とで囲まれて径方向から見て略Ｃ字の円弧形状になっている。半円弧部９と部分円弧部１０，１０は、点Ｐを曲率中心とする円弧上に沿う形状をなしている。上記凹み８に、グリース等の潤滑剤を貯溜している。   The partition part 7 which protrudes toward one axial direction is provided in the circumferential multiple places of the cyclic | annular base | matrix 5, and the pocket 6 exists between the inner side surfaces which face the circumferential direction of each partition part 7. FIG. A recess 8 that is recessed toward the other side in the axial direction is provided on the distal end side that protrudes toward one side in the axial direction of the partition portion 7, and the recess 8 is provided in the circumferential direction on the distal end side of each partition portion 7 by the recess 8. A bifurcated retaining portion 7a in between is formed. The pocket 6 is surrounded by a substantially semicircular arc portion 9 formed on the annular base 5 side and partial arc portions 10 and 10 formed on the retaining portion 7a side, and is substantially C-shaped when viewed from the radial direction. It has an arc shape. The semicircular arc portion 9 and the partial arc portions 10 and 10 have a shape along an arc with the point P as the center of curvature. A lubricant such as grease is stored in the recess 8.

ここで、各仕切り部７の円周方向で対向する内側面は、各ポケット６を構成する内壁面を構成し、この内壁面の径方向に沿う形状は球面になっている。そして、各仕切り部７の内径側の全体にわたって径方向内向きに膨出する膨出部１１を設けることによって、各仕切り部７の径方向肉厚ｈ２を環状母体５の径方向肉厚ｈ１より厚くするとともに、各仕切り部７で玉３を囲む面積、換言すれば玉３の抱き代を可及的に大きくしている。この場合、膨出部１１の軸方向幅Ｗ２を、内輪２の軌道溝２ａの軸方向幅Ｗ１より小さくして、冠形保持器４が内輪２に干渉しにくくしている。   Here, the inner side surface which opposes in the circumferential direction of each partition part 7 comprises the inner wall surface which comprises each pocket 6, and the shape along the radial direction of this inner wall surface is a spherical surface. Then, by providing the bulging portion 11 that bulges inward in the radial direction over the entire inner diameter side of each partition portion 7, the radial thickness h <b> 2 of each partition portion 7 is greater than the radial thickness h <b> 1 of the annular base body 5. In addition to increasing the thickness, the area surrounding the ball 3 by each partition 7, in other words, the holding allowance of the ball 3 is made as large as possible. In this case, the axial width W <b> 2 of the bulging portion 11 is made smaller than the axial width W <b> 1 of the raceway groove 2 a of the inner ring 2, thereby making it difficult for the crown-shaped cage 4 to interfere with the inner ring 2.

各膨出部１１それぞれの内径側を円周方向に沿って結ぶ円の直径（内径）をＲ１とし、深溝玉軸受の内輪２の開口側の外径をＲ２としたとき、膨出部１１の内径Ｒ１は、Ｒ２＜Ｒ１≦Ｒ２＋１．０ｍｍの関係を満たすことが好ましい。   When the diameter (inner diameter) of a circle connecting the inner diameter side of each bulging portion 11 along the circumferential direction is R1, and the outer diameter on the opening side of the inner ring 2 of the deep groove ball bearing is R2, the bulging portion 11 The inner diameter R1 preferably satisfies the relationship R2 <R1 ≦ R2 + 1.0 mm.

但し、このような寸法形状の冠形保持器４の場合、当該冠形保持器４を深溝玉軸受の外輪１と内輪２との間に組み込みにくくなる。そこで、内輪２の軌道溝２ａの両肩部に、軌道溝２ａの開口側の外径Ｒ２より小さい外径Ｒ３を有する小径案内面２ｂ，２ｂを設け、さらに、膨出部１１における軸方向先端側角部１１ａおよび付け根側角部１１ｂをテーパ形状に面取りしている。これによって、冠形保持器４を内輪２の軌道溝２ａの一方肩部側から組み込むにあたって、冠形保持器４の初期はめ込み作業が簡単に行えるようになる等、冠形保持器４の組み込み性が向上する。この小径案内面２ｂ，２ｂは、内輪２の軌道溝２ａの一方の肩部のみに設けてもよい。   However, in the case of the crown-shaped cage 4 having such a dimension and shape, it becomes difficult to incorporate the crown-shaped cage 4 between the outer ring 1 and the inner ring 2 of the deep groove ball bearing. Therefore, small-diameter guide surfaces 2b and 2b having an outer diameter R3 smaller than the outer diameter R2 on the opening side of the raceway groove 2a are provided on both shoulders of the raceway groove 2a of the inner ring 2, and further, the tip of the bulge portion 11 in the axial direction is provided. The side corner portion 11a and the base side corner portion 11b are chamfered into a tapered shape. Thus, when the crown-shaped cage 4 is assembled from the one shoulder side of the raceway groove 2a of the inner ring 2, the initial fitting operation of the crown-shaped cage 4 can be easily performed. Will improve. The small diameter guide surfaces 2 b and 2 b may be provided only on one shoulder of the raceway groove 2 a of the inner ring 2.

また、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により、冠形保持器４が回転中に軸方向に上記すきま分だけずれることがあるので、膨出部１１が内輪２の軌道溝２ａ内から軸方向へはみ出すことがある。この場合でも、上述した冠形保持器４と内輪２との寸法関係により、膨出部１１が内輪２の軌道溝２ａの開口部分に干渉しにくくなっている。   In addition, 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. During the rotation, the swelled portion 11 may protrude in the axial direction from the inside of the raceway groove 2a of the inner ring 2 because it may be displaced in the axial direction by the clearance. Even in this case, the bulging portion 11 is less likely to interfere with the opening of the raceway groove 2a of the inner ring 2 due to the dimensional relationship between the crown-shaped cage 4 and the inner ring 2 described above.

このような冠形保持器４では、膨出部１１を設けることによって各仕切り部７の強度が向上しているから、図５や図６に示すように深溝玉軸受に使用している状態において、高速回転になって回転遠心力が増大するに従い、図７に示すように、各仕切り部７が径方向斜め外向きに弾性変形するものの、従来例の冠形保持器のように環状母体５の径方向厚みｈ１と仕切り部７の径方向厚みｈ２とを同一にしている場合に比べて弾性変形しにくくなる。しかも、膨出部１１を設けることによって各仕切り部７で玉３を囲む面積を大きくしているから、各仕切り部７の内径側角部が玉３の内輪２側まで大きく回りこんで玉３に対する各仕切り部７の引っ掛かり代が大きくなる。これらの相乗作用によって、冠形保持器４が回転中に深溝玉軸受から外れにくくなり、信頼性が向上する。   In such a crown-shaped cage 4, since the strength of each partition portion 7 is improved by providing the bulging portion 11, in a state where it is used for a deep groove ball bearing as shown in FIGS. 5 and 6. As the rotational centrifugal force increases as the rotational speed increases, each partition portion 7 elastically deforms diagonally outward in the radial direction as shown in FIG. 7, but the annular mother body 5 like the conventional crown-shaped cage. Compared with the case where the radial direction thickness h1 and the radial direction thickness h2 of the partition part 7 are made the same, it becomes difficult to elastically deform. Moreover, since the area surrounding the balls 3 by the respective partition portions 7 is increased by providing the bulging portions 11, the corners on the inner diameter side of the respective partition portions 7 greatly wrap around to the inner ring 2 side of the balls 3. The catching cost of each partitioning portion 7 with respect to is increased. These synergistic actions make it difficult for the crown-shaped cage 4 to come off from the deep groove ball bearing during rotation, thereby improving the reliability.

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深溝玉軸受から外れにくくなるので、玉３の転がり動作が向上する等、深溝玉軸受の性能向上に貢献できる。   As described above, the crown-shaped cage 4 of the present invention is not easily detached from the deep groove ball bearing even when used at a high speed rotation in which the rotational centrifugal force increases, so that the rolling operation of the ball 3 is improved. Contributes to improved bearing performance.

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、図８および図９に示すように、冠形保持器４の各仕切り部７の抜け止め部７ａの径方向途中に凹み１２を設けることによって、各抜け止め部７ａを径方向に二つに分離した構成とすることができる。この例でも各仕切り部の内径側に膨出部１１を設けている。但し、この膨出部を設けていない構成としてもよい。この場合、抜け止め部７ａそれぞれが弾性変形しやすくなるので、抜け止め部７ａの突出寸法を大きくすることができる。これにより、玉３に対する回り込み代つまり抱き代を大きくして外れにくくしたうえで、玉３の組み込み性も良好となる。   In the said embodiment, as shown in FIG.8 and FIG.9, by providing the dent 12 in the radial direction middle of the retaining part 7a of each partition part 7 of the crown-shaped cage 4, each retaining part 7a is radial direction. The structure can be divided into two. Also in this example, the bulging portion 11 is provided on the inner diameter side of each partition portion. However, it is good also as a structure which does not provide this bulging part. In this case, each of the retaining portions 7a is easily elastically deformed, so that the protruding dimension of the retaining portion 7a can be increased. As a result, the wrap-around allowance for the ball 3, that is, the holding allowance is increased to make it difficult to remove, and the assemblability of the ball 3 is also improved.

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. 本発明に係る冠形保持器の他の実施形態で、ポケット周辺の斜視図The perspective view of the pocket periphery in another embodiment of the crown-shaped cage according to the present invention. 図８の冠形保持器の正面図Front view of the crown-shaped cage of FIG.

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…膨出部 3 ... ball 4 ... crown cage 5 ... annular base 6 ... pocket 7 ... partition 11 ... bulge

Claims (3)

環状母体の円周複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間に玉収容用のポケットを設けた合成樹脂製の冠形保持器であって、
上記仕切り部の内径側に、上記玉の抱き代を大きくする径方向内向きの膨出部を設けた、ことを特徴とする合成樹脂製の冠形保持器。 A crown-shaped cage made of a synthetic resin provided with a partition part protruding in one axial direction at a plurality of locations around the circumference of the annular mother body and provided with a pocket for ball accommodation between each partition part,
A crown-shaped cage made of synthetic resin, characterized in that a radially inwardly bulging portion that increases a holding margin of the ball is provided on an inner diameter side of the partition portion. 上記膨出部を上記仕切り部の内径側の全体に設けて当該仕切り部の径方向肉厚を上記環状母体の径方向肉厚よりも大きくした、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。 2. The composition according to claim 1, wherein the bulging portion is provided on the entire inner diameter side of the partition portion so that the radial thickness of the partition portion is larger than the radial thickness of the annular base body. Resin crown type cage. 外輪と、内輪と、両輪間に介装した複数の玉と、上記玉を円周方向略等間隔に保持する冠形保持器とを備える深溝玉軸受であって、
上記冠形保持器として請求項１または２に記載の合成樹脂製の冠形保持器を備え、かつ、上記内輪の軌道溝の一方肩部に、当該軌道溝の開口側外径より小さくした小径案内面を設けたことを特徴とする深溝玉軸受。 A deep groove ball bearing comprising an outer ring, an inner ring, a plurality of balls interposed between both wheels, and a crown-shaped cage that holds the balls at substantially equal intervals in the circumferential direction,
The crown-shaped cage made of the synthetic resin according to claim 1 or 2 as the crown-shaped cage, and having a small diameter smaller than the outer diameter on the opening side of the raceway groove on one shoulder of the raceway groove of the inner ring A deep groove ball bearing characterized by providing a guide surface.
JP2004193907A 2004-06-30 2004-06-30 Synthetic resin snap cage and deep groove ball bearing Withdrawn JP2006017179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004193907A JP2006017179A (en) 2004-06-30 2004-06-30 Synthetic resin snap cage and deep groove ball bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004193907A JP2006017179A (en) 2004-06-30 2004-06-30 Synthetic resin snap cage and deep groove ball bearing

Publications (1)

Publication Number Publication Date
JP2006017179A true JP2006017179A (en) 2006-01-19

Family

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Family Applications (1)

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Country Link
JP (1) JP2006017179A (en)

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