JP2614639B2 - Resin cage for thrust ball bearing - Google Patents

Resin cage for thrust ball bearing

Info

Publication number
JP2614639B2
JP2614639B2 JP63112793A JP11279388A JP2614639B2 JP 2614639 B2 JP2614639 B2 JP 2614639B2 JP 63112793 A JP63112793 A JP 63112793A JP 11279388 A JP11279388 A JP 11279388A JP 2614639 B2 JP2614639 B2 JP 2614639B2
Authority
JP
Japan
Prior art keywords
pocket
axial direction
cage
center
ball bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP63112793A
Other languages
Japanese (ja)
Other versions
JPH01283433A (en
Inventor
弘 上野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koyo Seiko Co Ltd
Original Assignee
Koyo Seiko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koyo Seiko Co Ltd filed Critical Koyo Seiko Co Ltd
Priority to JP63112793A priority Critical patent/JP2614639B2/en
Publication of JPH01283433A publication Critical patent/JPH01283433A/en
Application granted granted Critical
Publication of JP2614639B2 publication Critical patent/JP2614639B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • F16C33/3887—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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
    • 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
    • F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3843—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/3856—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages

Landscapes

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

Description

【発明の詳細な説明】 ＜産業上の利用分野＞ この発明はスラスト玉軸受用樹脂製保持器に関する。Description: TECHNICAL FIELD The present invention relates to a resin cage for a thrust ball bearing.

＜従来の技術＞ ラジアル玉軸受においては、保持器は保持する玉を半
径方向一方向に抱くようにすれば、環状に配列された玉
によって保持器と玉とは径方向に分離可能に停止される
が、スラスト玉軸受においては、保持する玉を軸方向両
側から抱くようにしないと、保持器と玉とは分離してし
まう。そのため、従来は、プレスやもみ抜きによりポケ
ットの軸方向一側に径方向に突起を有する保持器を作
り、そのポケットに玉を収納した後、軸方向他側をかし
め、それにより玉を軸方向両側から抱くようにしてい
た。<Prior Art> In a radial ball bearing, if the retainer is held in one direction in the radial direction, the retainer and the ball are stopped so as to be radially separable by the annularly arranged balls. However, in the thrust ball bearing, unless the held ball is held from both sides in the axial direction, the cage and the ball are separated. For this reason, conventionally, a retainer having a radial projection on one side in the axial direction of the pocket is formed by pressing or milling, and the ball is stored in the pocket, and then the other side in the axial direction is swaged. I was holding it from both sides.

＜発明が解決しようとする課題＞ しかしながら、上記従来のスラスト玉軸受用保持器
は、かしめ工程を必要とし、その結果として、組立工数
が大きくなるという問題がある。また、保持器を樹脂製
にすると、安価、軽量にでき、かつ自己潤滑性をもたす
ことも可能であり、さらに、樹脂は変形能が大きいた
め、かしめ等によらなくとも、ボールをポケットに挿入
して、係止できる等種々の点ですぐれているのである
が、スラスト軸受用保持器では、上述のように、ポケッ
トに軸方向両側に突起を設ける必要があるため、保持器
を射出成形しても型抜きが行えず、射出成形ができない
という問題がある。<Problems to be Solved by the Invention> However, the above-described conventional retainer for a thrust ball bearing requires a caulking step, and as a result, there is a problem that the number of assembly steps is increased. In addition, if the cage is made of resin, it can be made inexpensive, lightweight, and have self-lubricating properties. Further, since resin has a large deformability, the ball can be pocketed without being caulked. Although it is excellent in various points such as being able to be inserted and locked in the thrust bearing, in the thrust bearing retainer, as described above, it is necessary to provide projections on both sides in the axial direction in the pocket, so that the cage is ejected. There is a problem that the mold cannot be removed even when molded, and injection molding cannot be performed.

そこで、この発明の目的は、射出成形することができ
ると共に、安定して玉を軸方向両側から抱いて保持でき
るスラスト玉軸受用樹脂製保持器を提供することにあ
る。Therefore, an object of the present invention is to provide a resin cage for a thrust ball bearing that can be injection-molded and can stably hold a ball from both sides in the axial direction.

＜課題を解決するための手段＞ 上記目的を達成するため、この発明のスラスト玉軸受
用樹脂製保持器は、環状に配列された複数のポケットを
有するスラスト玉軸受用樹脂製保持器において、 軸方向に垂直で軸方向厚さの中心を通る中心平面に玉
の中心が位置するように、上記中心平面に関して軸方向
の一側の上記ポケットの一部に径方向の突起を設ける一
方、上記中心平面に関して軸方向の他側の上記ポケット
の一部に径方向の突起を設け、上記軸方向の一側の突起
の位置と軸方向の他側の突起の位置とが軸方向に重なら
ないように、上記両位置の位相を異ならせ、上記両突起
の内面が上記ポケットの中心を中心とする球面により形
成され、さらに、上記球面の半径は上記ポケットの円筒
面の半径に等しくなっていることを特徴としている。<Means for Solving the Problems> In order to achieve the above object, a resin cage for a thrust ball bearing according to the present invention is a resin cage for a thrust ball bearing having a plurality of annularly arranged pockets. A radial projection is provided on a part of the pocket on one side in the axial direction with respect to the center plane so that the center of the ball is positioned on a center plane perpendicular to the direction and passing through the center of the axial thickness. A radial projection is provided on a part of the pocket on the other side in the axial direction with respect to the plane so that the position of the projection on the one side in the axial direction and the position of the projection on the other side in the axial direction do not overlap in the axial direction. The phases of the two positions are made different, and the inner surfaces of the two projections are formed by a spherical surface centered on the center of the pocket, and the radius of the spherical surface is equal to the radius of the cylindrical surface of the pocket. Features

＜作用＞ ポケットに収納された玉は、ポケットの軸方向の一側
の一部に設けられた径方向の突起と上記ポケットの軸方
向の他側に設けた径方向の突起により軸方向両側から抱
かれる形となり、転動自在に周方向と軸方向の所定の位
置に保持される。一方、保持器は、その両側の突起によ
り、ポケットに収納している玉に、軸方向両側から係止
する。したがって、このスラスト玉軸受のどちらを上側
にしても、保持器はボールに係止されて、浮いた状態に
なる。上記保持器は射出成形により形成される。そのと
き、上記保持器は、ポケットの軸方向の一側の一部に設
けられた径方向の突起と軸方向の他側の一部に設けられ
た径方向と突起とが、その位置が重ならないようにその
位相が異なっているため、上記突起を形成する射出成形
金型の中子が、互いに軸方向の逆方向に抜ける。したが
って、このように両側に突起があっても、この保持器は
成型することができる。<Effect> The ball stored in the pocket is formed on both sides in the axial direction by a radial projection provided on a part of one side of the pocket in the axial direction and a radial projection provided on the other side of the pocket in the axial direction. It is embraced and held at predetermined positions in the circumferential and axial directions so that it can roll freely. On the other hand, the retainer is locked to the ball stored in the pocket from both axial sides by the projections on both sides thereof. Therefore, whichever of the thrust ball bearings is on the upper side, the retainer is locked by the ball and floats. The retainer is formed by injection molding. At this time, in the retainer, the radial projection provided on a part of one side in the axial direction of the pocket and the radial direction provided on a part of the other side in the axial direction and the projection are heavy. Since the phases are different so that they do not occur, the cores of the injection molding dies forming the projections come off in opposite axial directions. Therefore, even if there are protrusions on both sides, the retainer can be molded.

また、上記中心平面上に玉の中心が位置するように、
上記中心平面の両側に位相が異なる突起が形成されてい
るから、射出成型で容易に形成できると同時に玉の回転
運動の安定性を維持できる。Also, so that the center of the ball is located on the center plane,
Since the projections having different phases are formed on both sides of the center plane, the projections can be easily formed by injection molding, and the stability of the rotational movement of the ball can be maintained.

また、上記両突起の内面が上記ポケットの中心を中心
とする球面により形成され、さらに、上記球面の半径は
上記ポケットの円筒面の半径に等しくなっているから、
ポケットの円筒面と突起内面がなめらかに連続し、回転
性能が向上する。Further, the inner surfaces of the two projections are formed by a spherical surface centered on the center of the pocket, and the radius of the spherical surface is equal to the radius of the cylindrical surface of the pocket.
The cylindrical surface of the pocket and the inner surface of the projection are smoothly continuous, and the rotation performance is improved.

＜実施例＞ 以下、この発明を図示の実施例により詳細に説明す
る。<Example> Hereinafter, the present invention will be described in detail with reference to an illustrated example.

第１図は、この発明のスラスト玉軸受用樹脂製保持器
（以下、保持器と言う。）を用いたスラスト玉軸受の縦
半断面図であり、１は内輪、２は外輪である。上記内輪
１および外輪２は夫々互いに対向する軌道面1a,2aを有
している。この軌道面1a,2aの間には複数の玉３を収納
しており、保持器４によりこの玉３を周方向一定間隔に
保持している。この保持器４は、可撓性を有し、かつ自
己潤滑性を有するフッ素樹脂でできており、第２図に示
すように、断面矩形の環状で、軸方向に所定の厚みを有
しており、第３図に示すように、径方向の幅の中心を通
るピッチ円Ｐ上に、周方向等間隔に所定の数のポケット
5,5,…を有している。そして、第２図に示すように、軸
方向の厚みの中心を通り軸に垂直な平面Ａ上に、上記玉
３の中心がくるようになっている。FIG. 1 is a longitudinal half sectional view of a thrust ball bearing using a resin cage for a thrust ball bearing (hereinafter, referred to as a cage) of the present invention, wherein 1 is an inner ring, and 2 is an outer ring. The inner ring 1 and the outer ring 2 have track surfaces 1a and 2a facing each other. A plurality of balls 3 are accommodated between the raceway surfaces 1a and 2a, and the balls 3 are held by the retainer 4 at regular intervals in the circumferential direction. The retainer 4 is made of a flexible and self-lubricating fluororesin, and as shown in FIG. 2, has an annular shape with a rectangular cross section and a predetermined thickness in the axial direction. As shown in FIG. 3, a predetermined number of pockets are arranged at equal intervals in the circumferential direction on a pitch circle P passing through the center of the radial width.
5,5, ... Then, as shown in FIG. 2, the center of the ball 3 is located on a plane A passing through the center of the thickness in the axial direction and perpendicular to the axis.

上記ポケットは、その内面を、第２図に示すように、
軸方向の円筒面６により形成しており、上記ピッチ円Ｐ
を含む仮想浮上の円筒面Ｂの径方向外側の上記平面Ａを
境界面とする軸方向一側７に第2,3図に示すように円弧
状の突起7aを設けている。また、上記円筒面Ｂの径方向
内側の軸方向の他側８に同じく円弧状の突起8aを設けて
いる。上記一側の突起7aと上記他側の突起8aは、上記円
筒面Ｂを境界として互いの位置が重ならないように、そ
の位相を異ならせている。上記突起7a,8aは、夫々、そ
の内面がポケットの中心を中心とする球面7b,8bにより
形成されており、その半径は、上記ポケット５の円筒面
６の半径に等しい。これにより、上記ポケット５の円筒
面６と上記一側７および他側８の突起7a,8aの内面の球
面7b,8bは、なめらかに連続している。上記突起7a,8aに
より、ポケット５に収納された玉３は、軸方両側を係止
される。The pocket has an inner surface as shown in FIG.
The pitch circle P is formed by the cylindrical surface 6 in the axial direction.
As shown in FIGS. 2 and 3, an arc-shaped projection 7a is provided on one side 7 in the axial direction having the above-described plane A as a boundary surface on the radially outer side of the imaginary floating cylindrical surface B. Also, on the other side 8 in the axial direction on the radially inner side of the cylindrical surface B, an arc-shaped projection 8a is provided. The phases of the one-side protrusion 7a and the other-side protrusion 8a are different from each other with the cylindrical surface B as a boundary so that their positions do not overlap. The protrusions 7a and 8a have their inner surfaces formed by spherical surfaces 7b and 8b centered on the center of the pocket, respectively, and have a radius equal to the radius of the cylindrical surface 6 of the pocket 5. Thus, the cylindrical surface 6 of the pocket 5 and the spherical surfaces 7b, 8b of the inner surfaces of the protrusions 7a, 8a on the one side 7 and the other side 8 are smoothly continuous. The balls 3 stored in the pocket 5 are locked on both axial sides by the projections 7a and 8a.

上記保持器４は、射出成形により作られる。この保持
器の射出成形に用いる金型は、第４図に示すように、分
割面Ｃにより上下に分割される上型10と下型11とからな
っており、下型11には、断面矩形の環状の凹部12を設け
ている。そして、上記凹部12の底面12aの周方向所定の
位置に、先端側に、上記一側７の突起7aの内面の球面7b
を形成する球面13aを有する半円筒形状の下型中子13
を、上記分割面Ｃに垂直、かつ、所定のストローク範囲
で可動に設けている。上記下型中子13の上面13bは射出
成形時、上型10の分割面Ｃに密着している。一方、上型
10には、先端に上記他側８の突起8aの内面の球面8bを形
成する球面14aを有する半円筒形状の上型中子14を、上
記分割面Ｃに垂直、かつ、所定のストローク範囲で可動
に設けている。重ね合わされた上記上型中子14と下型中
子13とで、ポケット５の内面が形成される。この上型中
子14の下面14bは、射出成形時、下型の凹部12の底面12a
に密着している。上記金型により射出成形された保持器
４は、上型10を下型11から分離した後、上記上型中子14
および下型中子を夫々上型10の分離面Ｃおよび下型11の
底面12aまで図示の両矢印方向につまり逆方向に後退さ
せることにより、容易に金型から取り出される。The retainer 4 is made by injection molding. As shown in FIG. 4, the mold used for the injection molding of the retainer includes an upper mold 10 and a lower mold 11 which are vertically divided by a dividing surface C. The lower mold 11 has a rectangular cross section. Annular concave portion 12 is provided. Then, at a predetermined position in the circumferential direction of the bottom surface 12a of the concave portion 12, the spherical surface 7b of the inner surface of the protrusion 7a
Semi-cylindrical lower core 13 having a spherical surface 13a forming
Are movably provided in a predetermined stroke range perpendicular to the dividing surface C. The upper surface 13b of the lower mold core 13 is in close contact with the division surface C of the upper mold 10 during injection molding. Meanwhile, upper mold
10, a semi-cylindrical upper mold core 14 having a spherical surface 14a that forms a spherical surface 8b of the inner surface of the projection 8a on the other side 8 at the tip is perpendicular to the division surface C and within a predetermined stroke range. It is provided to be movable. The inner surface of the pocket 5 is formed by the superimposed upper core 14 and lower core 13. During injection molding, the lower surface 14b of the upper mold core 14
Closely adhered to. After the upper mold 10 is separated from the lower mold 11, the cage 4 injection-molded by the above-mentioned mold is used for the upper mold core 14.
The lower mold core is easily retracted from the mold by retreating in the direction of the double-headed arrow in the drawing, that is, in the opposite direction, to the separation surface C of the upper mold 10 and the bottom surface 12a of the lower mold 11, respectively.

上記構成において、玉3,3…は、保持器４がフッ素樹
脂製で可撓性を有しているため、突起7a,8aがあって
も、容易にそのポケット5,5,…内に収納される。ポケッ
トに収納された状態の玉３は、保持器４のポケット５の
一側７に設けられ、その内面が球面7bにより形成される
径方向の突起7aと保持器４のポケット５の他側８に設け
られ、その内面が球面8bにより形成される径方向の突起
8aとにより軸方向両側から抱かれる形となり、なめらか
に回転し、かつ、周方向所定の位置に保持される。一
方、保持器４は上記両側の突起7a,8aのいずれか一方と
玉３との係合により、軸方向所定の位置に支持されて内
輪１および外輪２の軸方向所定の間隙を保って支持さ
れ、内輪１および外輪２と保持器が干渉するのを防がれ
る。上記保持器４は、上記一側７および他側８に夫々に
設けられた径方向の突起7a,8aが、ポケット５の中心を
通る軸方向の円筒面Ｂを境界として、その位相が異なっ
ているため、前述のように、下型中子13および上型中子
14を有する金型を用いて射出成形することができる。そ
のため、従来組立時において必要としたかしめ工程を無
くすことができ、材料が安価であることと相俟って、保
持器４を従来に比べてはるかに安価に量産することがで
きる。また、保持器４を軽量化することができると共
に、フッ素樹脂が自己潤滑性を有しているため、玉3,3,
…を滑らかに回転させることができる。In the above configuration, the balls 3, 3,... Are easily stored in the pockets 5, 5,. Is done. The ball 3 housed in the pocket is provided on one side 7 of the pocket 5 of the cage 4, the inner surface of which is formed by a radial projection 7 a formed by a spherical surface 7 b and the other side 8 of the pocket 5 of the cage 4. And a radial projection whose inner surface is formed by a spherical surface 8b.
8a, it is held by both sides in the axial direction, smoothly rotates, and is held at a predetermined position in the circumferential direction. On the other hand, the retainer 4 is supported at a predetermined position in the axial direction by engagement of one of the protrusions 7a, 8a on the both sides with the ball 3, and supported while maintaining a predetermined axial gap between the inner ring 1 and the outer ring 2. Thus, interference between the inner ring 1 and the outer ring 2 and the cage is prevented. In the cage 4, the radial projections 7a and 8a provided on the one side 7 and the other side 8, respectively, have different phases with respect to an axial cylindrical surface B passing through the center of the pocket 5 as a boundary. Therefore, as described above, the lower core 13 and the upper core
It can be injection molded using a mold having 14. For this reason, the caulking step required in the conventional assembling can be eliminated, and the material can be inexpensively combined with mass production of the cage 4 at a much lower cost than in the past. In addition, since the cage 4 can be reduced in weight and the fluororesin has a self-lubricating property, the balls 3, 3, and
... can be smoothly rotated.

上記実施例では、一側７に設けた径方向の突起7aと他
側８に設けた径方向の突起8aを、ポケット５の中心を通
る軸方向の円筒面Ｂを境界面として、位相を異ならせる
ようにしたが、上記境界面を、保持器の半径方向の平面
にしてもよい。また、上記境界面を、保持器の半径方向
と所定の角度をなすように設けてもよい。In the above embodiment, the radial projections 7a provided on one side 7 and the radial projections 8a provided on the other side 8 are different in phase, with the axial cylindrical surface B passing through the center of the pocket 5 as the boundary surface. However, the boundary surface may be a flat surface in the radial direction of the cage. Further, the boundary surface may be provided so as to form a predetermined angle with the radial direction of the cage.

また上記実施例では、一側７および他側８の夫々の突
起7a,8aの位相を、１つの面Ｂを境界面として異ならせ
たが、上記境界面を１つに限らず、必要に応じてその数
を多くしてもよいのはいうまでもない。Further, in the above embodiment, the phases of the projections 7a and 8a on the one side 7 and the other side 8 are made different with one surface B as a boundary surface. Needless to say, the number may be increased.

＜発明の効果＞ 以上より明らかなように、この発明のスラスト玉軸受
用樹脂製保持器は、ポケットの軸方向の一側の一部に径
方向の突起を設けると共に、それと軸方向に重ならない
ように位相を異ならせて、他側の一部に径方向の突起を
設けたので、従来のようにかしめたりすること無く、ポ
ケットに玉を軸方向両側から抱くように玉を保持するこ
とができると共に、玉により軸方向所定の位置に支持さ
れる。<Effects of the Invention> As is apparent from the above description, the resin cage for a thrust ball bearing of the present invention has a radial projection on a part of one side of the pocket in the axial direction and does not overlap with the radial projection. Because the phase is made different and a radial projection is provided on part of the other side, it is possible to hold the ball in the pocket so as to hold the ball from both sides in the axial direction without caulking as in the past. As well as being supported by the ball at a predetermined position in the axial direction.

また、この発明のスラスト玉軸受用樹脂製保持器は樹
脂製であるので、保持器を軽量化することができると共
に、軸受に自己潤滑性をもたせることも可能であり、か
つ、安価に作ることができる。In addition, since the resin cage for a thrust ball bearing of the present invention is made of resin, the cage can be reduced in weight, and the bearing can be provided with self-lubricating properties. Can be.

さらに、この発明のスラスト玉軸受用樹脂製保持器
は、樹脂で作られると共に、軸方向の一側の一部に設け
た径方向の突起と軸方向他側の一部に設けた径方向の突
起とが軸方向に重ならないように位相が異なっているの
で、射出成形することができる。そのため、従来必要と
したかしめ工程を無くすことができることと相俟って、
量産性を高めることができ、保持器を従来に比べてはる
かに安価に作ることができる。Furthermore, the resin cage for a thrust ball bearing of the present invention is made of resin, and has a radial projection provided on a part of one side in the axial direction and a radial projection provided on a part of the other side in the axial direction. Since the phases are different so that the projections do not overlap in the axial direction, injection molding can be performed. Therefore, coupled with being able to eliminate the caulking process that was conventionally required,
The mass productivity can be improved, and the cage can be made much cheaper than before.

また、上記中心平面上に玉の中心が位置するように、
上記中心平面の両側に位相が異なる突起が形成されてい
るから、射出成形で容易に形成できると同時に玉の回転
運動の安定性を維持できる。Also, so that the center of the ball is located on the center plane,
Since the projections having different phases are formed on both sides of the center plane, the projections can be easily formed by injection molding, and the stability of the rotational movement of the ball can be maintained.

また、上記両突起の内面が上記ポケットの中心を中心
とする球面により形成され、さらに、上記球面の半径は
上記ポケットの円筒面の半径に等しくなっているから、
ポケットの円筒面と突起内面がなめらかに連続し、回転
性能が向上する。Further, the inner surfaces of the two projections are formed by a spherical surface centered on the center of the pocket, and the radius of the spherical surface is equal to the radius of the cylindrical surface of the pocket.
The cylindrical surface of the pocket and the inner surface of the projection are smoothly continuous, and the rotation performance is improved.

【図面の簡単な説明】[Brief description of the drawings]

第１図はこの発明のスラスト玉軸受用樹脂製保持器の一
実施例を用いたスラスト玉軸受の縦半断面図、第２図は
第１図の保持器の縦断面図、第３図は第２図の部分平面
図、第４図は第２図の保持器を射出成形する説明図であ
る。 ４……保持器、５……ポケット、７……一側、８……他
側、 7a,8a……突起、7b,8b……球面。FIG. 1 is a longitudinal half sectional view of a thrust ball bearing using one embodiment of a resin cage for a thrust ball bearing of the present invention, FIG. 2 is a longitudinal sectional view of the retainer of FIG. 1, and FIG. FIG. 4 is a partial plan view of FIG. 2, and FIG. 4 is an explanatory view of injection-molding the retainer of FIG. 4 ... retainer, 5 ... pocket, 7 ... one side, 8 ... other side, 7a, 8a ... projection, 7b, 8b ... spherical surface.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】環状に配列された複数のポケットを有する
スラスト玉軸受用樹脂製保持器において、 軸方向に垂直で軸方向厚さの中心を通る中心平面に玉の
中心が位置するように、上記中心平面に関して軸方向の
一側の上記ポケットの一部に径方向の突起を設ける一
方、上記中心平面に関して軸方向の他側の上記ポケット
の一部に径方向の突起を設け、上記軸方向の一側の突起
の位置と軸方向の他側の突起の位置とが軸方向に重なら
ないように、上記両位置の位相を異ならせ、上記両突起
の内面が上記ポケットの中心を中心とする球面により形
成され、さらに、上記球面の半径は上記ポケットの円筒
面の半径に等しくなっていることを特徴とするスラスト
玉軸受用樹脂製保持器。1. A resin cage for a thrust ball bearing having a plurality of annularly arranged pockets, wherein the center of the ball is located on a central plane perpendicular to the axial direction and passing through the center of the axial thickness. A radial projection is provided on a part of the pocket on one side in the axial direction with respect to the center plane, while a radial projection is provided on a part of the pocket on the other side in the axial direction with respect to the center plane. The positions of the protrusions on one side and the positions of the protrusions on the other side in the axial direction do not overlap in the axial direction, so that the phases of the two positions are different, and the inner surfaces of the two protrusions are centered on the center of the pocket. A resin cage for a thrust ball bearing, wherein the cage is formed by a spherical surface, and a radius of the spherical surface is equal to a radius of a cylindrical surface of the pocket.
JP63112793A 1988-05-10 1988-05-10 Resin cage for thrust ball bearing Expired - Fee Related JP2614639B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63112793A JP2614639B2 (en) 1988-05-10 1988-05-10 Resin cage for thrust ball bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63112793A JP2614639B2 (en) 1988-05-10 1988-05-10 Resin cage for thrust ball bearing

Publications (2)

Publication Number Publication Date
JPH01283433A JPH01283433A (en) 1989-11-15
JP2614639B2 true JP2614639B2 (en) 1997-05-28

Family

ID=14595656

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63112793A Expired - Fee Related JP2614639B2 (en) 1988-05-10 1988-05-10 Resin cage for thrust ball bearing

Country Status (1)

Country Link
JP (1) JP2614639B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2523874Y2 (en) * 1990-11-21 1997-01-29 エヌティエヌ株式会社 Angular contact ball bearings
DE102015209270A1 (en) * 2015-05-21 2016-07-07 Schaeffler Technologies AG & Co. KG Massive roller bearing cage for an axial rolling bearing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH064096Y2 (en) * 1987-01-29 1994-02-02 第一精工株式会社 Cage for rolling elements

Also Published As

Publication number Publication date
JPH01283433A (en) 1989-11-15

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