JP2008095770A - Resin retainer - Google Patents

Resin retainer Download PDF

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JP2008095770A
JP2008095770A JP2006276594A JP2006276594A JP2008095770A JP 2008095770 A JP2008095770 A JP 2008095770A JP 2006276594 A JP2006276594 A JP 2006276594A JP 2006276594 A JP2006276594 A JP 2006276594A JP 2008095770 A JP2008095770 A JP 2008095770A
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pocket
gates
resin
portions
cage
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Japanese (ja)
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Susumu Tanaka
進 田中
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NSK Ltd
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NSK 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
    • F16C33/412—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
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/04—Shaping by casting by injection-moulding
    • 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
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin retainer, capable of improving strength and molding accuracy even in a retainer having an odd total number of pocket parts and a large diameter. <P>SOLUTION: The total number of pocket parts 11 is set to be odd so that the number of pocket parts 11 disposed each between gates 14 is most equal. A hot water basin 16 is located in either one of column parts 15 formed at both ends of the pocket part 11 located at the circumferential center between the gates 14 where the number of the pocket parts 11 is odd. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、転動体を転動可能に保持するポケット部が周方向に複数箇所配置された樹脂製保持器に関し、特に、玉軸受等に組み込まれる樹脂製の冠型保持器に関する。   TECHNICAL FIELD The present invention relates to a resin cage in which a plurality of pocket portions that hold a rolling element so as to be able to roll are arranged in the circumferential direction, and more particularly to a resin crown cage that is incorporated in a ball bearing or the like.

一般に、自動車のトランスミッションなどのように油潤滑下で用いられる深溝玉軸受は、内輪、外輪及び転動体である玉の材料には、軸受鋼であればＳＵＪ２が、肌焼鋼であればＳＣＲ４２０やＳＣＭ４２０相当の鋼材等が使用され、玉を転動自在に保持する保持器には、ＳＰＣＣからなる鉄製の波形プレス保持器や、樹脂製の冠型保持器等が使用されるが、近年、環境問題の高まりから、自動車のトランスミッションを構成する軸受部品においても、極めて高速化のニーズが高まっていることから、トランスミッション用の玉軸受には、軽量、且つ自己潤滑性に優れる樹脂製保持器が使用されるケースが増えている。   In general, deep groove ball bearings used under oil lubrication, such as automobile transmissions, are made of SUJ2 for bearing steel and SCR420 for case-hardened steel. A steel corrugated press retainer made of SPCC, a resin crown retainer, or the like is used as a retainer that uses a steel material equivalent to SCM420 and holds the balls in a freely rolling manner. Due to the growing problem, there is a growing need for higher speeds in bearing parts that make up automobile transmissions. Lightweight and self-lubricating resin cages are used for ball bearings for transmissions. Increasing number of cases.

樹脂製保持器は、通常、射出成形により製造される。例えば、図３に示すように、成形体である保持器に対応して形成された環状のキャビティ１内にゲート２から合成樹脂材料を注入する。ゲート２からキャビティ１内に注入された樹脂材料は、キャビティ１内を左右に分かれて流動すると共に、ゲート２からキャビティ１の周方向に１８０°離間したウェルド位置Ｗで合流して、相互に接合される。   The resin cage is usually manufactured by injection molding. For example, as shown in FIG. 3, a synthetic resin material is injected from a gate 2 into an annular cavity 1 formed corresponding to a cage that is a molded body. The resin material injected from the gate 2 into the cavity 1 flows separately in the cavity 1 to the left and right, and joins at a weld position W that is 180 degrees apart from the gate 2 in the circumferential direction of the cavity 1 to join each other. Is done.

ところで、ゲート２からウェルド位置Ｗまでの距離が比較的長いと、その流動過程で溶融樹脂が冷却されて温度が低下することになる。温度が低下した樹脂材料同士がウェルド位置Ｗで合流して接合されると、ウェルド位置Ｗでの強度が他の部分より弱くなる。   By the way, if the distance from the gate 2 to the weld position W is relatively long, the molten resin is cooled in the flow process, and the temperature is lowered. When the resin materials whose temperature has decreased are joined and joined at the weld position W, the strength at the weld position W becomes weaker than other portions.

そこで、キャビティ１の周方向に複数のゲート２を設け、ゲート２間の複数の領域のうち、一部の領域の周方向距離を他の領域の周方向距離より長く設定し、周方向距離が長い領域内における注入樹脂材料の合流箇所のみに１個の湯溜まりを設けた樹脂製保持器が提案されている（例えば、特許文献１参照）。   Therefore, a plurality of gates 2 are provided in the circumferential direction of the cavity 1, and among the plurality of regions between the gates 2, the circumferential distance of some regions is set longer than the circumferential distance of other regions, and the circumferential distance is There has been proposed a resin cage in which a single hot water pool is provided only at a joining point of the injected resin material in a long region (see, for example, Patent Document 1).

特許第３６６６５３６号公報Japanese Patent No. 3666536

しかしながら、上記した特許文献１においては、キャビティの周方向の距離が長い領域と短い領域とが配置されるため、各領域でのポケット部の数のばらつきが大きくなり、特に、ＰＣＤがφ１２０ｍｍ以上の大径の保持器の場合には、保持器の成形精度が低下し易く、高速回転時の保持器強度が十分に得られない可能性がある。   However, in the above-mentioned Patent Document 1, since the region having a long distance in the circumferential direction of the cavity and the short region are arranged, the variation in the number of pocket portions in each region becomes large. In particular, the PCD is φ120 mm or more. In the case of a large-diameter cage, the molding accuracy of the cage is likely to decrease, and there is a possibility that the cage strength during high-speed rotation cannot be obtained sufficiently.

また、ポケット部の数が奇数である保持器では、ウェルド位置Ｗが、断面積が最も小さいポケット部の底部に位置されることになるため、潤滑条件や回転条件が過酷な使用条件下（例えば、回転速度が許容回転数以上）においては、ウェルド位置Ｗで破損する可能性がある。   Further, in a cage having an odd number of pocket portions, the weld position W is positioned at the bottom of the pocket portion having the smallest cross-sectional area, so that the lubrication conditions and rotation conditions are severe (for example, When the rotational speed is equal to or higher than the allowable rotational speed), there is a possibility that the weld position W is damaged.

本発明は、このような不都合を解消するためになされたものであり、その目的は、ポケット部の総数が奇数、且つ大径の保持器であったとしても、保持器の強度及び成形精度を向上することができる樹脂製保持器を提供することにある。   The present invention has been made to eliminate such inconveniences, and the purpose of the present invention is to improve the strength and molding accuracy of the cage even when the total number of pocket portions is an odd-numbered and large-diameter cage. The object is to provide a resin cage that can be improved.

本発明の上記目的は、下記の構成により達成される。
（１） 転動体を転動可能に保持するポケット部が周方向に複数箇所配置され、複数のゲートと少なくとも１つの湯溜まりを備える金型により成形される樹脂製保持器であって、ポケット部の総数が奇数とされると共に、ゲート間ごとに配置されるポケット部の数が最も均等になる数とされ、湯溜まりは、ポケット部が奇数となるゲート間の周方向中央に位置するポケット部の両端部に形成される柱部のいずれか一方に位置づけられることを特徴とする樹脂製保持器。
（２） ポケット部が奇数となるゲート間のポケット部の数が、ポケット部が偶数となるゲート間のポケット部の数より少ないことを特徴とする（１）に記載の樹脂製保持器。
（３） ポケット部が奇数となるゲート間に形成されるウェルドが、ポケット部が奇数となるゲート間の周方向中央に位置するポケット部の底部と湯溜まりとの間に位置されると共に、ウェルドの断面積がポケット部の底部の断面積の２倍以上となる箇所に位置されることを特徴とする請求項（１）又は（２）に記載の樹脂製保持器。 The above object of the present invention can be achieved by the following constitution.
(1) A resin cage that is formed by a mold having a plurality of pocket portions arranged in the circumferential direction to hold a rolling element in a rollable manner and having a plurality of gates and at least one hot water pool. The number of pockets arranged between the gates is the most even number, and the sump is a pocket part located at the center in the circumferential direction between the gates where the pocket part is odd. A resin cage characterized in that it is positioned on either one of the pillar portions formed at both ends of the resin.
(2) The resin cage according to (1), wherein the number of pocket portions between the gates having an odd number of pocket portions is smaller than the number of pocket portions between the gates having an even number of pocket portions.
(3) The weld formed between the gates having the odd number of pocket portions is positioned between the bottom of the pocket portion located at the center in the circumferential direction between the gates having the odd number of pocket portions and the hot water pool. The resin-made cage according to claim 1 or 2, wherein the cross-sectional area of the resin is located at a location where the cross-sectional area of the bottom of the pocket portion is twice or more.

本発明の樹脂製保持器によれば、ポケット部の総数が奇数とされると共に、ゲート間ごとに配置されるポケット部の数が最も均等になる数とされ、湯溜まりは、ポケット部が奇数となるゲート間の周方向中央に位置するポケット部の両端部に形成される柱部のいずれか一方に位置づけられるため、ポケット部の総数が奇数、且つ大径の保持器であったとしても、保持器の強度及び成形精度を向上することができる。   According to the resin cage of the present invention, the total number of pocket portions is an odd number, and the number of pocket portions arranged between the gates is the most even number. Because it is positioned in either one of the pillar portions formed at both ends of the pocket portion located in the circumferential center between the gates, even if the total number of pocket portions is an odd-numbered and large-diameter cage, The strength and molding accuracy of the cage can be improved.

以下、本発明に係る樹脂製保持器の一実施形態について、図面を参照して詳細に説明する。
図１は本発明に係る樹脂製保持器の一実施形態を説明するための斜視図、図２はポケット部の数が奇数となるゲート間の周方向中央に位置するポケット部を説明するための拡大斜視図である。 Hereinafter, an embodiment of a resin cage according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view for explaining an embodiment of a resin cage according to the present invention, and FIG. 2 is for explaining a pocket portion located at the center in the circumferential direction between gates where the number of pocket portions is an odd number. It is an expansion perspective view.

本実施形態の樹脂製保持器１０は、図１に示すように、転動体である複数の玉（図示せず）を周方向に略等間隔で転動可能に保持するポケット部１１を有しており、このポケット部１１の内周面の周方向両端部には軸方向に突出する一対の爪部１２が形成される。また、一対の爪部１２の各先端間には開口部１３が形成されており、この開口部１３から玉を一対の爪部１２を押し広げつつポケット部１１に押し込むことにより、玉がポケット部１１内に微小な隙間を介して転動可能に保持される。   As shown in FIG. 1, the resin cage 10 of the present embodiment has a pocket portion 11 that holds a plurality of balls (not shown) that are rolling elements so as to roll in a circumferential direction at substantially equal intervals. A pair of claw portions 12 projecting in the axial direction are formed at both ends in the circumferential direction of the inner peripheral surface of the pocket portion 11. Further, an opening 13 is formed between the tips of the pair of claws 12, and the ball is pushed into the pocket portion 11 while expanding the pair of claws 12 from the opening 13. 11 is held so as to be able to roll through a minute gap.

また、樹脂製保持器１０は、複数のゲート１４（図１では５箇所）と１つの湯溜まり１６を備える金型により射出成形されるもので、その樹脂材料としては、炭素繊維又はガラス繊維を２０〜４０重量％含有した４６ナイロン、ＰＰＳ、及びＰＥＥＫ等が好ましい。また、具体的には、ＰＣＤがφ１２０ｍｍ以上φ２００ｍｍ以下に形成される。   The resin cage 10 is injection-molded by a mold having a plurality of gates 14 (five places in FIG. 1) and one hot water pool 16, and the resin material is carbon fiber or glass fiber. 46 nylon, PPS, PEEK and the like containing 20 to 40% by weight are preferable. Specifically, the PCD is formed to have a diameter of 120 mm or more and 200 mm or less.

そして、本実施形態では、樹脂製保持器１０は、ポケット部１１の総数が奇数とされている。また、５箇所のゲート１４により領域Ａ，Ｂ，Ｃ，Ｄ，Ｅに区分けされており、この領域Ａ〜Ｅごとに配置されるポケット部１１の数は、最も均等になる数（ばらつきが最小となる数）に設定される。また、領域Ｅのポケット部１１の数は、各領域Ａ〜Ｄのポケット部１１の数より少なくなるように設定される。さらに、各領域Ａ〜Ｅの周方向の長さは、６０ｍｍ以上１２０ｍｍ以下に設定される。   In the present embodiment, the resin cage 10 has an odd number of pocket portions 11. Further, the areas A, B, C, D, and E are divided by five gates 14, and the number of pocket portions 11 arranged for each of the areas A to E is the most even number (the variation is the smallest). Number). Further, the number of pocket portions 11 in the region E is set to be smaller than the number of pocket portions 11 in each region A to D. Furthermore, the length in the circumferential direction of each region A to E is set to 60 mm or more and 120 mm or less.

具体的には、ゲート１４の数が５箇所、ポケット部１１の総数が４５個の場合、領域Ａ，Ｂ，Ｃ，Ｄのポケット部１１の数は偶数で、領域Ａ，Ｂ，Ｃのポケット部１１の数はそれぞれ「１０個」、領域Ｄのポケット部１１の数は「８個」に設定される。残りの領域Ｅのポケット部１１の数は奇数で、且つ領域Ａ，Ｂ，Ｃ，Ｄのポケット部１１の数より少ない「７個」に設定される。   Specifically, when the number of the gates 14 is five and the total number of the pocket portions 11 is 45, the number of the pocket portions 11 in the regions A, B, C, and D is an even number, and the pockets in the regions A, B, and C are included. The number of portions 11 is set to “10”, and the number of pocket portions 11 in the region D is set to “8”. The number of pocket portions 11 in the remaining region E is set to an odd number and “7” which is smaller than the number of pocket portions 11 in the regions A, B, C, and D.

また、樹脂製保持器１０のポケット部１１の両端部には、柱部１５がそれぞれ形成されており、領域Ｅの周方向中央に位置するポケット部１１の柱部１５のいずれか一方に湯溜まり１６が位置づけられている。これにより、領域Ｅに形成されるウェルド１７は、図２に示すように、領域Ｅの周方向中央に位置するポケット部１１の底部と湯溜まり１６との間に位置されると共に、ウェルド１７の径方向の断面積がポケット部１１の底部の径方向の断面積の２倍以上となる箇所に位置される。   Further, column portions 15 are formed at both end portions of the pocket portion 11 of the resin cage 10, respectively, and a hot water pool is accumulated in one of the column portions 15 of the pocket portion 11 located at the circumferential center of the region E. 16 is positioned. Thereby, as shown in FIG. 2, the weld 17 formed in the region E is positioned between the bottom of the pocket portion 11 located at the center in the circumferential direction of the region E and the hot water pool 16, and the weld 17 It is located at a location where the radial cross-sectional area is twice or more the radial cross-sectional area of the bottom of the pocket portion 11.

以上説明したように、本実施形態の樹脂製保持器１０によれば、ポケット部１１の総数が奇数とされると共に、ゲート１４間ごとの領域Ａ〜Ｅに配置されるポケット部１１の数が最も均等になる数とされ、湯溜まり１６が、ポケット部１１が奇数となるゲート１４間の領域Ｅの周方向中央に位置するポケット部１１の両端部に形成される柱部１５のいずれか一方に位置づけられるため、ポケット部１１の総数が奇数、且つ大径の保持器であったとしても、保持器１０の領域Ｅに形成されるウェルド１７がポケット部１１の底部から周方向に外れた位置に形成されるので、保持器１０の剛性を向上することができ、保持器１０の強度を向上することができる。また、ゲート１４間ごとの領域Ａ〜Ｅのバランスを略均等にすることができるので、保持器１０の成形精度を向上することができる。   As described above, according to the resin cage 10 of the present embodiment, the total number of pocket portions 11 is an odd number, and the number of pocket portions 11 arranged in the regions A to E between the gates 14 is the same. One of the column portions 15 formed at both ends of the pocket portion 11 positioned at the center in the circumferential direction of the region E between the gates 14 where the number of the pockets 11 is an odd number. Therefore, even if the total number of pocket portions 11 is an odd-numbered and large-diameter retainer, the weld 17 formed in the region E of the retainer 10 is displaced from the bottom portion of the pocket portion 11 in the circumferential direction. Therefore, the rigidity of the cage 10 can be improved, and the strength of the cage 10 can be improved. Moreover, since the balance of the areas A to E between the gates 14 can be made substantially uniform, the molding accuracy of the cage 10 can be improved.

また、本実施形態の樹脂製保持器１０によれば、保持器１０の領域Ｅに形成されるウェルド１７が、領域Ｅの周方向中央に位置するポケット部１１の底部と湯溜まり１６との間に位置されると共に、ウェルド１７の断面積がポケット部１１の底部の断面積の２倍以上となる箇所に位置されるため、保持器１０の剛性をさらに向上することができ、保持器１０の強度をさらに向上することができる。   Further, according to the resin cage 10 of the present embodiment, the weld 17 formed in the region E of the cage 10 is between the bottom of the pocket portion 11 located in the circumferential center of the region E and the hot water pool 16. And the weld 17 is located at a location where the cross-sectional area of the weld 17 is twice or more the cross-sectional area of the bottom of the pocket portion 11, the rigidity of the cage 10 can be further improved. The strength can be further improved.

また、本実施形態の樹脂製保持器１０によれば、樹脂製保持器１０の各領域Ａ〜Ｅの周方向の長さを６０ｍｍ以上１２０ｍｍ以下に設定するため、射出成形時のショートによる不具合を回避することができる。   In addition, according to the resin cage 10 of the present embodiment, the circumferential length of each region A to E of the resin cage 10 is set to 60 mm or more and 120 mm or less, so there is a problem due to a short at the time of injection molding. It can be avoided.

なお、本発明は、前述した一実施形態に限定されるものではなく、適宜、変形、改良等が可能である。
例えば、上記実施形態では、ゲートの数を５箇所、ポケット部の総数を４５個とした樹脂製保持器を例示したが、ゲートの数及びポケット部の数は限定されず、例えば、ゲートの数を３箇所、ポケット部の総数を１７個とした樹脂製保持器であってもよい。この場合、２箇所のゲート間の領域のポケット部の数はそれぞれ偶数の「６個」に設定され、残りのゲート間の領域のポケット部の数は奇数、且つ偶数領域のポケット部の数より少ない「５個」に設定される。
また、上記実施形態では、ポケット部の数が奇数となるゲート間の領域Ｅの周方向中央に位置するポケット部の柱部のいずれか一方に湯溜まりを設ける場合を例示したが、これに限定されず、ポケット部の数が偶数となるゲート間の領域Ａ，Ｂ，Ｃ，Ｄについても、樹脂のショート防止対策のために、周方向中央の柱部に湯溜まりを設けるようにしてもよい。
さらに、上記実施形態では、ポケット部の数が奇数となるゲート間の領域を１箇所のみ設けた場合を例示したが、これに限定されず、ポケット部の数が奇数となるゲート間の領域を３箇所或いはそれ以上の奇数箇所設けるようにしてもよい。 The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like can be made as appropriate.
For example, in the above embodiment, the resin cage having five gates and 45 pockets in total is illustrated, but the number of gates and the number of pockets is not limited. For example, the number of gates May be a resin cage in which the total number of the pocket portions is 17 pieces. In this case, the number of pocket portions in the region between the two gates is set to an even number “6”, and the number of pocket portions in the region between the remaining gates is odd and the number of pocket portions in the even region is A small number of “5” is set.
In the above embodiment, the case where the hot water pool is provided in one of the column portions of the pocket portion located in the center in the circumferential direction of the region E between the gates where the number of the pocket portions is an odd number is illustrated. In addition, in the regions A, B, C, and D between the gates where the number of pocket portions is an even number, a sump may be provided in the central column portion in the circumferential direction in order to prevent a resin short circuit. .
Furthermore, in the above embodiment, the case where only one region between the gates where the number of pocket portions is odd is provided, but the present invention is not limited to this, and the region between the gates where the number of pocket portions is odd is defined. Three or more odd places may be provided.

本発明に係る樹脂製保持器の一実施形態を説明するための斜視図である。It is a perspective view for demonstrating one Embodiment of the resin-made cages concerning this invention. ポケット部の数が奇数となるゲート間の周方向中央に位置するポケット部を説明するための拡大斜視図である。It is an expansion perspective view for demonstrating the pocket part located in the circumferential direction center between the gates in which the number of pocket parts becomes an odd number. 従来の樹脂製保持器の射出成形方法の一例を説明するための説明図である。It is explanatory drawing for demonstrating an example of the injection molding method of the conventional resin cage.

符号の説明Explanation of symbols

１０ 樹脂製保持器
１１ ポケット部
１２ 爪部
１３ 開口部
１４ ゲート
１５ 柱部
１６ 湯溜まり
１７ ウェルド DESCRIPTION OF SYMBOLS 10 Resin cage 11 Pocket part 12 Claw part 13 Opening part 14 Gate 15 Column part 16 Hot water pool 17 Weld

Claims (3)

転動体を転動可能に保持するポケット部が周方向に複数箇所配置され、複数のゲートと少なくとも１つの湯溜まりを備える金型により成形される樹脂製保持器であって、
前記ポケット部の総数が奇数とされると共に、前記ゲート間ごとに配置される前記ポケット部の数が最も均等になる数とされ、
前記湯溜まりは、前記ポケット部が奇数となるゲート間の周方向中央に位置する前記ポケット部の両端部に形成される柱部のいずれか一方に位置づけられることを特徴とする樹脂製保持器。 A plurality of pocket parts that hold the rolling elements in a rollable manner are arranged in the circumferential direction, and a resin cage molded by a mold having a plurality of gates and at least one hot water pool,
The total number of the pocket portions is an odd number, and the number of the pocket portions arranged between the gates is the most even number,
The resin reservoir is characterized in that the hot water pool is positioned at any one of column portions formed at both ends of the pocket portion located at the center in the circumferential direction between the gates where the pocket portion is an odd number. 前記ポケット部が奇数となるゲート間の前記ポケット部の数が、前記ポケット部が偶数となるゲート間の前記ポケット部の数より少ないことを特徴とする請求項１に記載の樹脂製保持器。   The number of the said pocket parts between the gates in which the said pocket part becomes odd number is smaller than the number of the said pocket parts between the gates in which the said pocket part becomes even number, The resin cage of Claim 1 characterized by the above-mentioned. 前記ポケット部が奇数となるゲート間に形成されるウェルドが、前記周方向中央に位置する前記ポケット部の底部と前記湯溜まりとの間に位置されると共に、前記ウェルドの断面積が前記ポケット部の底部の断面積の２倍以上となる箇所に位置されることを特徴とする請求項１又は２に記載の樹脂製保持器。   A weld formed between the gates having the odd number of pocket portions is positioned between the bottom of the pocket portion located in the center in the circumferential direction and the hot water pool, and a cross-sectional area of the weld is the pocket portion. The resin cage according to claim 1 or 2, wherein the resin cage is located at a location that is twice or more the cross-sectional area of the bottom of the resin.
JP2006276594A 2006-10-10 2006-10-10 Resin retainer Pending JP2008095770A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015075201A (en) * 2013-10-10 2015-04-20 日本精工株式会社 Resin-made cage for bearing and manufacturing method thereof
US10377070B2 (en) 2016-02-26 2019-08-13 Nsk Ltd. Method for manufacturing bearing cage
WO2023095639A1 (en) * 2021-11-29 2023-06-01 Ntn株式会社 Rolling bearing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015075201A (en) * 2013-10-10 2015-04-20 日本精工株式会社 Resin-made cage for bearing and manufacturing method thereof
US10377070B2 (en) 2016-02-26 2019-08-13 Nsk Ltd. Method for manufacturing bearing cage
WO2023095639A1 (en) * 2021-11-29 2023-06-01 Ntn株式会社 Rolling bearing

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