JP4165157B2

JP4165157B2 - Rolling bearing and manufacturing method of rolling bearing

Info

Publication number: JP4165157B2
Application number: JP2002257734A
Authority: JP
Inventors: 博文百々路
Original assignee: JTEKT Corp
Current assignee: JTEKT Corp
Priority date: 2002-09-03
Filing date: 2002-09-03
Publication date: 2008-10-15
Anticipated expiration: 2022-09-03
Also published as: JP2004092856A

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば、自動車用トランスミッションにおけるギヤ支持などに用いられる転がり軸受に関する。
【０００２】
【従来の技術】
従来、自動車用トランスミッションには、ギヤ支持用の転がり軸受が設けられている。自動車用トランスミッションでは、ギヤどうしの噛合い振動が転がり軸受を介してハウジング（ケース）に伝達されて共振が発生するのを防止するために、転がり軸受の外輪部材の外周一部に形成した溝に、樹脂が射出成形される場合がある。
【０００３】
上記のように、転がり軸受の外輪部材の外周一部に形成した溝に樹脂を射出成形する場合では、ハウジングあるいは外輪部材のわずかな変形で外輪部材とハウジングとが強く接触してしまい、この場合は振動が伝達し共振が発生してしまう。
【０００４】
このため、外輪部材の外周面全域に所定の厚みを有する樹脂材を施し、転がり軸受をハウジングに挿入して、転がり軸受とハウジングとを非接触に保持する技術がある（例えば、特許文献１参照）。
【０００５】
【特許文献１】
特開平８−９３７５９号（第３頁，第１図）
【０００６】
【発明が解決しようとする課題】
しかし樹脂材は低剛性であるため、外輪部材の外周面全域に厚く樹脂材を施して転がり軸受とハウジングとを非接触に保持すると、軸受システムとしての剛性が不足してしまう。また、逆に外輪部材の外周面全域に薄く樹脂材を施した状態で転がり軸受をハウジングに挿入すると、その挿入の際に、樹脂材が外輪部材から剥離してしまうことが考えられ、この場合も、軸受機能が低下する。
【０００７】
【課題を解決するための手段】
本発明の請求項１に係る転がり軸受は、内輪部材に対して、転動体を介して同心に配置される外輪部材が設けられ、前記外輪部材の外周面に径方向に対向する円筒部と、前記円筒部の一方側端部から径方向内方に折曲されて前記外輪部材の一方の側面に軸方向に対向する環状部と、を有する金属製の円筒体を備え、前記円筒体は、前記円筒部に円筒部の射出成形用ゲートを有するとともに前記環状部に環状部の射出成形用ゲートを有し、前記円筒部の射出成形用ゲートおよび前記環状部の射出成形用ゲートから、前記円筒部と前記外輪部材の前記外周面および前記環状部と前記側面との間の隙間に樹脂が射出されて薄膜状に形成されている。
また、請求項１に記載の転がり軸受を、ハウジングの装着凹部に装着した装置において、前記円筒体の表面硬さは、前記ハウジングの硬さと同じまたはそれ以上の値に設定している。
【０００８】
本発明の請求項３に係る転がりの製造方法は、内輪部材に対して、転動体を介して同心に配置される外輪部材における外周面および一方の側面を被覆するよう、前記外輪部材の外周面に径方向に対向する円筒部と、前記円筒部の一方側端部から径方向内方に折曲されて前記外輪部材の一方の側面に軸方向に対向する環状部と、前記円筒部に設けられた円筒部の射出成形用ゲートと、前記環状部に設けられた環状部の射出成形用ゲートと、を有する金属製の円筒体を配置し、前記円筒部の射出成形用ゲートおよび前記環状部の射出成形用ゲートから、前記円筒部と前記外輪部材の前記外周面および前記環状部と前記側面との間の隙間に樹脂を射出して薄膜状に形成する。
【０００９】
上記のように、外輪部材を被覆する円筒体の内周面と外輪部材の外周面との間の隙間に樹脂が射出されて膜状に形成されている構成の転がり軸受によれば、転がり軸受を、例えばハウジングの装着用凹部に装着して、例えばギヤを支持する軸体を内輪部材に挿通させて使用した場合、膜状の樹脂によって軸体の振動が吸収されて、振動がハウジングに伝わるのが防止され、従って、共振が抑制される。
【００１０】
一方で、樹脂は部材どうしを隔絶するだけの最小限の厚みを有する膜状であるので、転がり軸受として必要な剛性も確保される。
【００１１】
【発明の実施の形態】
以下、本発明の実施形態を、自動車用トランスミッションにおけるギヤ支持用の転がり軸受を例に、図面に基づいて説明する。図１は転がり軸受の使用状態を示す断面図、図２は製造工程を示す全体断面図、図３は分解断面図である。
【００１２】
図１および図２に示すように、本発明の実施形態に係る転がり軸受１は、トランスミッションのハウジング（ケース）２に形成された装着凹部３に軸方向から挿通して装着されるものである。この装着凹部３は、円筒面状の内周壁４と、この内周壁４の一側端部から径方向内方に向かう環状の側壁５とを有する。
【００１３】
この転がり軸受１は、互いに同心に配置されて軸心回りに相対回転可能な外輪部材６および内輪部材７と、外輪部材６および内輪部材７の間に転動自在に配置される転動体としての複数個の玉８とを備える単列深溝の総玉軸受である。
【００１４】
また、この転がり軸受１は、外輪部材６の外周面および一方の側面全域に亙って射出成形された樹脂製（例えば「６，６−ナイロン」が用いられる）の共振防止部材９と、共振防止部材９を外嵌被覆するとともに、前記装着凹部３に内嵌されるプレス鋼板製（例えば、ＳＰＣＣ，ＳＰＢ等が用いられる）で、円筒状に形成された円筒体（以下、被覆部材という）１０とを備える。
【００１５】
図３に示すように、被覆部材１０は、外輪部材６の外周面に径方向で対向する円筒部１１と、この円筒部１１の一方側端部から径方向内方に折曲されて、外輪部材６の一方の側面に軸方向で対向する環状部１２とから断面略Ｌ字形に形成されている。円筒部１１と環状部１２の連続部、すなわち被覆部材１０の角部１０ａは、断面円弧状に形成されている。
【００１６】
被覆部材１０、すなわち鋼板はＪＩＳ規格に規定されているものが用いられる。この種の鋼板は、0.1，0.2，0.3，〜，0.9，1.0，1.2，1.4，1.6，1.8，2.0(mm)のように、1.0mmを基準にそれ以下の厚みは0.1mmごと、それ以上の厚みは0.2mmごとに規定されているものである。
【００１７】
そして、この実施形態の場合、0.5mm〜2.0mmの厚み範囲の鋼板が用いられる。また、この鋼板は浸炭焼入れ等により表面硬化され、４５０ＨＶ〜５５０ＨＶの範囲の表面硬さを有する。
【００１８】
そしてこの実施形態では、被覆部材１０の円筒部１１には、軸方向に並設して複数個の射出成形用ゲート（以下、単に「ゲート」と呼ぶ）１３が形成され、これらゲート１３は、円筒部１１における円周方向等配位置に複数箇所に形成されている。さらに、被覆部材１０の環状部１２にもゲート１４が形成され、このゲート１４は、環状部１２における円周方向等配位置に形成されている。
【００１９】
この被覆部材１０の表面硬さは、例えばＨ_RＣ５８〜６５程度に設定される。この硬さは、ハウジング２の硬さと同等かそれ以上の値である。
【００２０】
前記共振防止部材９は、ゲート１３，１４から樹脂を射出成形することによって外輪部材６の外周面に一体成形されるラジアル側共振防止部９ａと、外輪部材６の一方の側面に一体成形されるアキシャル側共振防止部９ｂとを有する。
【００２１】
共振防止部材９の厚みは、樹脂の成形性および転がり軸受１全体の剛性を考慮して決定される値である。換言すれば、共振防止部材９の厚みは、外輪部材６の外周面と装着凹部３の内周壁４、あるいは外輪部材６の側面と装着凹部３の側壁５とを実質的に隔絶し得る厚みとなる。
【００２２】
但し、本発明の実施形態の場合、共振防止部材９の外周に被覆部材１０が配置され、この被覆部材１０が装着凹部３の内周壁４、あるいは装着凹部３の側壁５に当接するものであるので、共振防止部材９の厚みは、外輪部材９と被覆部材１０とを隔絶し得るに充分な厚みとなる。具体的には、共振防止部材９の厚みは０．５mm以下とすることが望ましい。
【００２３】
上記構成において、まず、内輪部材７と玉８と外輪部材６とを互いに組付け、外輪部材６を、被覆部材１０で被覆する。このとき被覆部材１０の円筒部１０が外輪部材６の外周面に径方向で対向するよう、また被覆部材１０の環状部１２が外輪部材６の一方側の側面に軸方向で対向するよう被覆部材１０を配置する。
【００２４】
次に、所定の金型２０をこれに形成したゲート２１，２２が被覆部材１０のゲート１３，１４に、それぞれ対向して一致するよう被覆部材１０に設置し、各ゲート１３，１４から樹脂を外輪部材６と被覆部材１０の間の微小隙間に均厚な膜状になるよう射出して共振防止部材９とする。これにより、外輪部材６に、共振防止部材９および被覆部材１０が一体となった転がり軸受１が製造される。
【００２５】
このようにして製造された転がり軸受１を、ハウジング２の装着凹部３に対して、被覆部材１０の環状部１２が側壁５に当接するよう、かつ被覆部材１０の円筒部１０が内周壁４に圧入されるよう、軸方向から挿通して装着する。
【００２６】
この際、被覆部材１０の角部１０ａは円弧状に形成されているため、被覆部材１０の角部１０ａがガイド機能を果たして、転がり軸受１をハウジング２の装着凹部３に対して円滑に装着するすることができる。
【００２７】
そして、転がり軸受１をハウジング２の装着凹部３に装着する際、装着凹部３の内周壁４と樹脂製の共振防止部材９との間には、プレス鋼板製の被覆部材１０が存在するので、共振防止部材９が膜状であっても外輪部材６の表面から剥離してしまうのを防止することができる。
【００２８】
そして、この被覆部材１０の表面硬さをハウジング２の硬さと同等かそれ以上の値に設定していることによれば、転がり軸受１をハウジング２の装着凹部３に対して装着する際に、被覆部材１０の損傷を防止することができる。
【００２９】
転がり軸受１の内輪部材７にギヤ支持用の軸体２５を挿通してこれを支持した場合、ギヤから軸体２５を介してラジアル方向へ伝わろうとする振動は、共振防止部材９におけるラジアル側共振防止部９ａの弾性によって吸収される。
【００３０】
また、ギヤから軸体２５を介してアキシャル方向へ伝わろうとする振動は、共振防止部材９におけるアキシャル側共振防止部９ｂの弾性によって吸収され、振動がハウジング２に伝わるのを確実に防止して、トランスミッションでの共振の発生を防止することができる。
【００３１】
そして、樹脂製の共振防止部材９は、外輪部材６とハウジング２との間に介在するのみでその機能を果たし得るので、上述のように、可及的に肉薄に形成すればよい。このため、転がり軸受１をハウジング２の装着凹部３に装着した場合に、振動がハウジング２に伝わるのを防止し得る一方で、転がり軸受１全体の剛性を必要以下に低下させてしまうこともない。
【００３２】
上記実施形態では、転がり軸受１の外輪部材６における外周面および一方の側面に、共振防止部材９におけるラジアル側共振防止部９ａおよびアキシャル側共振防止部９ｂを一体に形成した。そして、この共振防止部材９を被覆する断面Ｌ字形の被覆部材１０を設け、車両用のトランスミッションにおけるギヤ支持用の転がり軸受１として用いる目的で、転がり軸受１をハウジング２の装着凹部３に対して、被覆部材１０の環状部１２が側壁５に当接するよう、かつ被覆部材１０の円筒部１０が内周壁４に圧入されるよう、軸方向から挿通して装着する場合で説明した。
【００３３】
しかし本発明は、これに限定されるものではない。例えば、転がり軸受１を円筒面状の内周壁４のみを有するハウジング２に装着するような場合では、ギヤあるいはその他の回転部材からのラジアル方向へ伝わろうとする振動を考慮して、外輪部材６の外周面にラジアル側共振防止部９ａのみを形成するよう、被覆部材１０を、外輪部材６の外周面に径方向で対向する円筒部１１のみから形成する。
【００３４】
そしてラジアル側共振防止部９ａは、円筒部１１に形成したゲート１３から射出成形する。このように、共振防止部材９におけるアキシャル側共振防止部９ｂを設けるか否かは、転がり軸受１を装着するハウジング２の構成に対応させる。何れの場合も、トランスミッションあるいはその他の装置における共振を防止することができる。
【００３５】
【発明の効果】
以上の説明から明らかな通り、本発明の転がり軸受では、樹脂材が外輪部材から剥離してしまうのを防止して、軸受機能の低下を防止し得るとともに、必要な剛性を確保しつつ、軸体からの振動がハウジング等に伝わるのを防止し得、もって共振を防止し得る。
【図面の簡単な説明】
【図１】本発明の実施形態を示す転がり軸受の使用状態を示す断面図である。
【図２】同じく製造工程を示す断面図である。
【図３】同じく分解断面図である。
【符号の説明】
１転がり軸受
２ハウジング
３装着凹部
４内周壁
５側壁
６外輪部材
７内輪部材
８玉
９共振防止部材
１０円筒体
１１円筒部
１２環状部
１３，１４ゲート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rolling bearing used, for example, for supporting a gear in an automobile transmission.
[0002]
[Prior art]
Conventionally, a rolling bearing for supporting a gear is provided in an automobile transmission. In an automobile transmission, in order to prevent the meshing vibration between gears from being transmitted to the housing (case) via the rolling bearing and causing resonance, a groove formed in a part of the outer periphery of the outer ring member of the rolling bearing is provided. The resin may be injection molded.
[0003]
As described above, when the resin is injection-molded into the groove formed on the outer peripheral part of the outer ring member of the rolling bearing, the outer ring member and the housing come into strong contact with a slight deformation of the housing or the outer ring member. Vibrates and causes resonance.
[0004]
For this reason, there is a technique in which a resin material having a predetermined thickness is applied to the entire outer peripheral surface of the outer ring member, the rolling bearing is inserted into the housing, and the rolling bearing and the housing are held in a non-contact manner (see, for example, Patent Document 1). ).
[0005]
[Patent Document 1]
JP-A-8-93759 (page 3, FIG. 1)
[0006]
[Problems to be solved by the invention]
However, since the resin material has low rigidity, if the resin material is thickly applied to the entire outer peripheral surface of the outer ring member to hold the rolling bearing and the housing in a non-contact state, the rigidity of the bearing system is insufficient. Conversely, if the rolling bearing is inserted into the housing with a thin resin material applied to the entire outer peripheral surface of the outer ring member, the resin material may be peeled off from the outer ring member during the insertion. However, the bearing function is reduced.
[0007]
[Means for Solving the Problems]
Rolling bearing according to claim 1 of the present invention, for the inner ring member, and the rolling through the body is provided an outer ring member disposed concentrically, the cylindrical portion facing radially outer peripheral surface of the outer ring member, An annular portion that is bent radially inward from one end portion of the cylindrical portion and is axially opposed to one side surface of the outer ring member, and the cylindrical body includes: The cylindrical part has a cylindrical part injection molding gate and the annular part has an annular part injection molding gate, and the cylindrical part injection molding gate and the annular part injection molding gate from the cylindrical part parts and the resin between the gap between the outer peripheral surface and the annular portion of the outer ring member and the side surface is formed to be injection thin film.
In the apparatus in which the rolling bearing according to claim 1 is mounted in the mounting recess of the housing, the surface hardness of the cylindrical body is set to a value equal to or higher than the hardness of the housing.
[0008]
In the rolling manufacturing method according to claim 3 of the present invention, the outer ring surface of the outer ring member is covered with the outer ring surface and one side surface of the outer ring member arranged concentrically with the inner ring member via the rolling elements. Provided in the cylindrical portion, a cylindrical portion facing radially inwardly, an annular portion bent radially inward from one end of the cylindrical portion and axially opposed to one side surface of the outer ring member, and An injection molding gate for the cylindrical portion and an injection molding gate for the annular portion provided in the annular portion are disposed, and the injection molding gate for the cylindrical portion and the annular portion are disposed. From the injection molding gate, resin is injected into a gap between the cylindrical portion and the outer peripheral surface of the outer ring member and between the annular portion and the side surface to form a thin film.
[0009]
As described above, according to the rolling bearing having the configuration in which the resin is injected into the gap between the inner peripheral surface of the cylindrical body that covers the outer ring member and the outer peripheral surface of the outer ring member, the rolling bearing is configured. For example, when the shaft is mounted in the mounting recess of the housing and the shaft body supporting the gear is inserted through the inner ring member, the vibration of the shaft body is absorbed by the film-shaped resin, and the vibration is transmitted to the housing. And therefore resonance is suppressed.
[0010]
On the other hand, since the resin is in the form of a film having a minimum thickness enough to isolate the members from each other, the rigidity necessary for a rolling bearing is also ensured.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, taking a rolling bearing for supporting a gear in an automobile transmission as an example. FIG. 1 is a sectional view showing a usage state of a rolling bearing, FIG. 2 is an overall sectional view showing a manufacturing process, and FIG. 3 is an exploded sectional view.
[0012]
As shown in FIGS. 1 and 2, a rolling bearing 1 according to an embodiment of the present invention is mounted by being inserted from an axial direction into a mounting recess 3 formed in a housing (case) 2 of a transmission. The mounting recess 3 includes a cylindrical surface-shaped inner peripheral wall 4 and an annular side wall 5 that extends radially inward from one end of the inner peripheral wall 4.
[0013]
The rolling bearing 1 is arranged as a rolling element that is arranged concentrically with each other and is rotatable between an outer ring member 6 and an inner ring member 7 that can rotate relative to each other around an axis, and between the outer ring member 6 and the inner ring member 7. A single row deep groove total ball bearing including a plurality of balls 8.
[0014]
Further, the rolling bearing 1 includes a resonance preventing member 9 made of resin (for example, “6,6-nylon” is used) that is injection-molded over the outer peripheral surface of the outer ring member 6 and the entire area of one side surface, and a resonance. A cylindrical body (hereinafter referred to as a covering member) made of a pressed steel sheet (for example, SPCC, SPB or the like is used) that is fitted into the mounting recess 3 and that externally covers the prevention member 9. 10.
[0015]
As shown in FIG. 3, the covering member 10 includes a cylindrical portion 11 that is radially opposed to the outer peripheral surface of the outer ring member 6, and is bent radially inward from one end portion of the cylindrical portion 11. The member 6 is formed to have a substantially L-shaped cross section from the annular portion 12 facing the one side surface in the axial direction. A continuous portion of the cylindrical portion 11 and the annular portion 12, that is, a corner portion 10a of the covering member 10 is formed in an arc shape in cross section.
[0016]
As the covering member 10, that is, a steel plate, those specified in the JIS standard are used. This type of steel sheet is 0.1, 0.2, 0.3, ~, 0.9, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0 (mm). The thickness is defined for every 0.2 mm.
[0017]
In the case of this embodiment, a steel sheet having a thickness range of 0.5 mm to 2.0 mm is used. The steel sheet is surface hardened by carburizing and quenching and has a surface hardness in the range of 450 HV to 550 HV.
[0018]
In this embodiment, a plurality of injection molding gates (hereinafter simply referred to as “gates”) 13 are formed in the cylindrical portion 11 of the covering member 10 in parallel in the axial direction. The cylindrical portion 11 is formed at a plurality of positions at equidistant positions in the circumferential direction. Furthermore, a gate 14 is also formed in the annular portion 12 of the covering member 10, and the gate 14 is formed at a circumferentially equidistant position in the annular portion 12.
[0019]
The surface hardness of the covering member 10 is set to about H _R C58-65, for example. This hardness is equal to or higher than the hardness of the housing 2.
[0020]
The resonance preventing member 9 is integrally formed on one side surface of the outer ring member 6 and a radial side resonance preventing portion 9a integrally formed on the outer peripheral surface of the outer ring member 6 by injection molding resin from the gates 13 and 14. And an axial-side resonance prevention unit 9b.
[0021]
The thickness of the resonance preventing member 9 is a value determined in consideration of the moldability of the resin and the rigidity of the entire rolling bearing 1. In other words, the thickness of the resonance preventing member 9 is such that the outer circumferential surface of the outer ring member 6 and the inner circumferential wall 4 of the mounting recess 3 or the side surface of the outer ring member 6 and the side wall 5 of the mounting recess 3 can be substantially isolated. Become.
[0022]
However, in the case of the embodiment of the present invention, the covering member 10 is disposed on the outer periphery of the resonance preventing member 9, and the covering member 10 comes into contact with the inner peripheral wall 4 of the mounting recess 3 or the side wall 5 of the mounting recess 3. Therefore, the thickness of the resonance preventing member 9 is sufficient to isolate the outer ring member 9 and the covering member 10. Specifically, the thickness of the resonance preventing member 9 is desirably 0.5 mm or less.
[0023]
In the above configuration, first, the inner ring member 7, the ball 8 and the outer ring member 6 are assembled to each other, and the outer ring member 6 is covered with the covering member 10. At this time, the covering member 10 is configured such that the cylindrical portion 10 of the covering member 10 faces the outer peripheral surface of the outer ring member 6 in the radial direction, and the annular portion 12 of the covering member 10 faces the side surface on one side of the outer ring member 6 in the axial direction. 10 is arranged.
[0024]
Next, the gates 21 and 22 on which the predetermined mold 20 is formed are placed on the covering member 10 so as to face and coincide with the gates 13 and 14 of the covering member 10, respectively, A small gap between the outer ring member 6 and the covering member 10 is injected so as to form a uniform film, thereby forming a resonance preventing member 9. As a result, the rolling bearing 1 in which the resonance preventing member 9 and the covering member 10 are integrated with the outer ring member 6 is manufactured.
[0025]
In the rolling bearing 1 manufactured in this way, the annular portion 12 of the covering member 10 is in contact with the side wall 5 with respect to the mounting recess 3 of the housing 2, and the cylindrical portion 10 of the covering member 10 is on the inner peripheral wall 4. Insert it from the axial direction so that it is press-fitted.
[0026]
At this time, since the corner portion 10a of the covering member 10 is formed in an arc shape, the corner portion 10a of the covering member 10 performs a guide function and smoothly mounts the rolling bearing 1 on the mounting recess 3 of the housing 2. can do.
[0027]
And, when the rolling bearing 1 is mounted in the mounting recess 3 of the housing 2, there is a covering member 10 made of a pressed steel plate between the inner peripheral wall 4 of the mounting recess 3 and the resin anti-resonance member 9. Even if the resonance preventing member 9 is in the form of a film, it can be prevented from peeling off from the surface of the outer ring member 6.
[0028]
And according to setting the surface hardness of this covering member 10 to a value equal to or higher than the hardness of the housing 2, when mounting the rolling bearing 1 to the mounting recess 3 of the housing 2, Damage to the covering member 10 can be prevented.
[0029]
When a shaft body 25 for supporting a gear is inserted into and supported by the inner ring member 7 of the rolling bearing 1, vibrations that are transmitted from the gear through the shaft body 25 in the radial direction are resonated on the radial side in the resonance preventing member 9. It is absorbed by the elasticity of the prevention part 9a.
[0030]
In addition, vibration that is transmitted from the gear in the axial direction via the shaft body 25 is absorbed by the elasticity of the axial-side resonance preventing portion 9b in the resonance preventing member 9, and the vibration is reliably prevented from being transmitted to the housing 2. The occurrence of resonance in the transmission can be prevented.
[0031]
Since the resin-made resonance preventing member 9 can perform its function only by being interposed between the outer ring member 6 and the housing 2, it may be formed as thin as possible as described above. For this reason, when the rolling bearing 1 is mounted in the mounting recess 3 of the housing 2, vibrations can be prevented from being transmitted to the housing 2, while the rigidity of the entire rolling bearing 1 is not lowered below necessity. .
[0032]
In the above embodiment, the radial-side resonance preventing portion 9a and the axial-side resonance preventing portion 9b of the resonance preventing member 9 are integrally formed on the outer peripheral surface and one side surface of the outer ring member 6 of the rolling bearing 1. Then, a covering member 10 having an L-shaped cross section for covering the resonance preventing member 9 is provided, and the rolling bearing 1 is mounted on the mounting recess 3 of the housing 2 for the purpose of being used as a rolling bearing 1 for supporting a gear in a vehicle transmission. In the above description, the annular portion 12 of the covering member 10 is inserted through the axial direction so that the annular portion 12 contacts the side wall 5 and the cylindrical portion 10 of the covering member 10 is press-fitted into the inner peripheral wall 4.
[0033]
However, the present invention is not limited to this. For example, in the case where the rolling bearing 1 is mounted on the housing 2 having only the cylindrical inner peripheral wall 4, the outer ring member 6 of the outer ring member 6 is taken into account in consideration of vibrations transmitted from the gear or other rotating members in the radial direction. The covering member 10 is formed only from the cylindrical portion 11 that faces the outer peripheral surface of the outer ring member 6 in the radial direction so that only the radial side resonance preventing portion 9a is formed on the outer peripheral surface.
[0034]
And the radial side resonance prevention part 9a is injection-molded from the gate 13 formed in the cylindrical part 11. FIG. Thus, whether or not the axial side resonance preventing portion 9b is provided in the resonance preventing member 9 corresponds to the configuration of the housing 2 to which the rolling bearing 1 is mounted. In either case, resonance in the transmission or other device can be prevented.
[0035]
【The invention's effect】
As is clear from the above description, in the rolling bearing of the present invention, it is possible to prevent the resin material from peeling from the outer ring member, to prevent the bearing function from being lowered, and to secure the necessary rigidity while securing the shaft. It is possible to prevent vibrations from the body from being transmitted to the housing and the like, thereby preventing resonance.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a usage state of a rolling bearing according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the same manufacturing process.
FIG. 3 is an exploded sectional view of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rolling bearing 2 Housing 3 Mounting recessed part 4 Inner peripheral wall 5 Side wall 6 Outer ring member 7 Inner ring member 8 Ball 9 Resonance prevention member 10 Cylindrical body 11 Cylindrical part 12 Annular parts 13, 14 Gate

Claims

For the inner ring member, the outer ring member disposed concentrically provided through the rolling elements,
A cylindrical portion that radially opposes the outer peripheral surface of the outer ring member; and an annular portion that is bent radially inward from one end of the cylindrical portion and axially faces one side surface of the outer ring member; A metal cylinder having
The cylindrical body has a cylindrical part injection molding gate in the cylindrical part and an annular part injection molding gate in the annular part,
From the injection molding gate of the injection molding gate and the annular portion of the cylindrical portion, the resin is injected thin film between gap between the outer peripheral surface and the annular portion and the side surface of the outer ring member and the cylindrical portion A rolling bearing characterized by being formed into a shape.

In an apparatus in which the rolling bearing according to claim 1 is mounted in a mounting recess of a housing,
The surface hardness of the cylindrical body is set to a value equal to or higher than the hardness of the housing.

A cylindrical portion radially opposed to the outer peripheral surface of the outer ring member so as to cover the outer peripheral surface and one side surface of the outer ring member disposed concentrically with respect to the inner ring member via the rolling elements; and An annular portion that is bent radially inward from one side end portion and axially opposed to one side surface of the outer ring member; a cylindrical injection molding gate provided in the cylindrical portion; and the annular portion An injection molding gate of an annular portion provided in the metal cylinder body having,
From the injection molding gate of the cylindrical part and the injection molding gate of the annular part, a resin is injected into the gap between the cylindrical part and the outer peripheral surface of the outer ring member and the annular part and the side surface to form a thin film A method for manufacturing a rolling bearing, characterized by comprising: