JP2004162830A - Pulley made of resin with bearing - Google Patents

Pulley made of resin with bearing Download PDF

Info

Publication number
JP2004162830A
JP2004162830A JP2002330259A JP2002330259A JP2004162830A JP 2004162830 A JP2004162830 A JP 2004162830A JP 2002330259 A JP2002330259 A JP 2002330259A JP 2002330259 A JP2002330259 A JP 2002330259A JP 2004162830 A JP2004162830 A JP 2004162830A
Authority
JP
Japan
Prior art keywords
bearing
outer ring
resin
pulley
peripheral surface
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.)
Pending
Application number
JP2002330259A
Other languages
Japanese (ja)
Inventor
Shinji Fujita
伸二 藤田
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 JP2002330259A priority Critical patent/JP2004162830A/en
Publication of JP2004162830A publication Critical patent/JP2004162830A/en
Pending legal-status Critical Current

Links

Images

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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
    • 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
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
    • 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
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/30—Material joints
    • 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
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/63—Gears with belts and pulleys

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulley made of a resin with a bearing which accurately makes reference surface and hardly produces any slippage (creep) without increasing processing man-hour. <P>SOLUTION: In the pulley made of the resin with the bearing which is adapted to integrally mould the pulley made of the resin 2 on outer periphery of an outer ring 3 of the bearing, outer peripheral surface of the outer ring 3 of the bearing is formed of grinding surface and turning surface of non-grinding surface. In this case, the outer peripheral surface 3a of the outer ring 3 of the bearing is formed of a convex larger diameter and formed of other smaller diameter (3b, 3c), and forms one as the grinding surface and other as non-grinding surface. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、軸受の外輪外周に合成樹脂製プーリを一体成形し且つクリープを防止することの出来る構成とした軸受付樹脂製プーリに関する。
【０００２】
【従来の技術】
内燃機関等では、冷却用ポンプや発電用ジェネレータ等の補機を駆動する場合、該内燃機関から動力を取り出し、ベルト駆動によってこれらの補機を回転駆動する。このようなベルト駆動において、特にアイドラプーリは、外輪回転のラジアル玉軸受が使用されるが、通常軸受の外周面に合成樹脂をインサート成形により射出成形した樹脂一体型のプーリとして製作し、使用される。このように外輪の外周に合成樹脂を一体成形した軸受一体型の樹脂プーリは、ベルトテンションにより外輪に対して円周方向に滑り動くことで、プーリ内周面と外輪外周面との間にいわゆる「クリープ」が生じ易い、という問題がある。特に、比較的高温環境で使用される場合、熱膨張率の相違からクリープの問題が生じやすい。
【０００３】
従来から軸受外輪と樹脂製プーリとの間のクリープ防止策として種々の提案がなされている。例えば、軸受の外周に合成樹脂製プーリを形成してなる樹脂製プーリ付き軸受において、軸受の外輪の外周面が未研磨とされて、粗い旋削面のままにしたもの（例えば、特許文献１参照）。或いは、軸受外輪の周囲に樹脂層を周着形成してなる樹脂製プーリにおいて、前記外輪の側面に、前記樹脂層の樹脂の一部が埋設するようなすべり防止手段を施したことを特徴とする軸受付の樹脂製プーリ（例えば、特許文献２参照）がある。
【０００４】
【特許文献１】
実開平６−３５７２５号
【特許文献２】
実開昭６４−４８４６９号
【０００５】
上記するように、軸受外輪と一体成形される合成樹脂製プーリは、外輪外周面と樹脂製プーリの内周面にすべり抵抗が大きくなるような工夫や、相対的な滑りが生じないような工夫がなされる。しかし従来のクリープ防止策では接触面積が十分でなかったり、クリープ防止のための加工工数が増大するためコストアップとなる、という問題が依然として存在する。また、特許文献１のような場合、研磨面が存在しないので精度の良い基準面が出しにくいという問題もあった。
【０００６】
この発明は、上記する課題に対処するためになされたものであり、加工工数も増大せず、基準面を正確に出し、すべり（クリープ）も生じにくい軸受付樹脂製プーリを提供することを目的としている。
【０００７】
【課題を解決するための手段】
【０００８】
即ち、この発明は、上記する課題を解決するために、請求項１に記載の発明は、軸受外輪の外周に樹脂製プーリを一体成形してなる軸受付樹脂製プーリにおいて、前記軸受外輪の外周面を、研磨面と未研磨の旋削面とを形成したことを特徴とするものである。
【０００９】
また、請求項２に記載の発明は、前記軸受外輪の外周面には、凸状の大径部とそれ以外の小径部とを形成し、一方を研磨面とし、他方を未研磨面としたことを特徴とするものである。
【００１０】
また、請求項３に記載の発明は、前記軸受外輪の外周面は凹状の溝を形成し、外周面または溝の底のいずれか一方を研磨面とし、他方を未研磨としたことを特徴とするものである。
【００１１】
【発明の実施の形態】
以下、この発明の具体的な実施の形態について図面を参照して説明する。
図１は、この発明の第１の実施の形態の軸受付樹脂製プーリを示すものであって、軸方向の一部断面図である。軸受１は、外輪３と内輪４と転動体（玉）５より構成され、外輪内周端部にはシール板６，６が嵌め込まれている。該外輪２の外周側にはインサート成形により合成樹脂製プーリ２（以下、樹脂プーリ２とする）が一体に形成されている。この場合、樹脂プーリ２は、前記外輪３の両側面の一部にかかる（覆う）ように一体に形成される。
【００１２】
図２に示すように、軸受１の外輪３の外周面は、中央部を凸状として径を少し大きくした大径部３ａと、該大径部３ａの両側の径を少し小さくした小径部３ｂ，３ｃとで構成される。通常、バランスをとるため、小径部３ｂ，３ｃの径は同一とするが、バランスを考慮する必要がなければ同一とする必要はない。そして、樹脂プーリ２をインサート成形する場合、その前に前記大径部３ａを研磨加工し、前記小径部３ｂ，３ｃは、旋盤等で旋削加工した状態のままの少し粗い面の状態とする。尚、この場合、小径部３ｂ，３ｃから大径部３ａにかけて若干の傾斜面（或いは側面）３ｄ，３ｅは未研磨の状態とする。また、未研磨の旋削加工面は、通常周方向の旋削目（周溝が軸方向に対して直角方向に平行して設けられる）であるが、これを軸方向になるように加工を施せばクリープに対してより大きな抵抗となるので更に効果的である。
【００１３】
上記するように、この軸受付樹脂製プーリは、外周面の大径部３ａを研磨した面とし、両側の小径部３ｂ，３ｃ及び小径部３ｂ，３ｃから大径部３ａにかけての傾斜面３ｄ，３ｅ（或いは側面）を旋削面とした外輪３をプーリ金型にセットして射出成形して製作される。このように外輪３の外周面の大径部３ａのみを研磨面とし、他を旋削面とすると、これら小径部３ｂ，３ｃおよび傾斜面（或いは側面）３ｄ，３ｅと、これらと接する樹脂プーリ２の内周面２ｂ，２ｃ，２ｄ，２ｅとは、粗い面の状態で結合しているため、樹脂プーリ２にベルトテンションによって該外輪に対し円周方向に力がかかっても滑りに対する抵抗力が大きくなり、プーリ内周面と外輪外周面との相対的な滑りが生じにくくなる。また、外輪３の軌道底に相当する部分に大径部３ａを設けているので、小径部３ｂ，３ｃとは相対的に肉厚となり、樹脂プーリ２の射出成形の際、射出圧によって従来肉薄となっていた軌道底相当部が変形するのを効果的に防止することが出来、軸受機能の低下を防ぐことができる。尚、外輪３の外周面の一部を研磨するのは、軌道面の形成（加工、研磨）の際の基準面としての役割を果たすためであり、必須の加工である。
【００１４】
次に、図３は、この発明の第２の実施の形態を示すものであって、軸受付樹脂製プーリの軸方向の一部断面図である。この実施の形態においても、軸受１の外輪３の外周面は、中央部を凸状として径を少し大きくした大径部３ａと、該大径部３ａの両側の径を少し小さくした小径部３ｂ，３ｃとで構成される。そして、樹脂プーリ２をインサート成形する場合、その前に前記小径部３ｂ，３ｃを研磨加工し（３ｂまたは３ｃの一方のみ研磨加工してもよい）、前記大径部３ａおよび小径部３ｂ，３ｃから大径部３ａにかけての傾斜面（或いは側面）３ｄ，３ｅは、旋盤等で旋削加工した状態のままの少し粗い面の状態（未研磨）の状態とする。
【００１５】
上記構成とした外輪３を、プーリ金型にセットして射出成形して製作する。このように外輪３の外周面の小径部３ｂ，３ｃ（または、いずれか一方）を研磨面とし、他を旋削面とすると、大径部３ａおよび傾斜面（或いは側面）３ｄ，３ｅと、これらと接する樹脂プーリ２の内周面２ａ，２ｄ，２ｅとは、粗い面の状態で結合しているため、樹脂プーリ２にベルトテンションによって該外輪に対し円周方向に力がかかっても滑りに対する抵抗力が大きくなり、プーリ内周面と外輪外周面との相対的な滑りが生じにくくなる。尚、第１の実施の形態及び第２の実施の形態においては、傾斜面（或いは側面）３ｄ，３ｅを研磨面としても良い。
【００１６】
次に、図４は、この発明の第３の実施の形態を示すものであって、軸受付樹脂製プーリの軸方向の一部断面図である。この実施の形態においては、軸受１の外輪３は、外周面の中央部に径を小さくした凹部、即ち溝３ｆを形成し、この溝３ｆの両側面３ｂ，３ｃの径をこの溝３ｆより大きく形成してある。そして、前記溝３ｆの表面と該溝３ｆから径の大きな面３ｂ，３ｃにかけての傾斜面（或いは側面）３ｇ，３ｈを旋削面とし、径の大きな面３ｂ，３ｃを研磨面とする。
【００１７】
上記構成とした外輪３を、プーリ金型にセットして射出成形して樹脂プーリ２を製作すると、外輪３の溝３ｆおよび傾斜面（或いは側面）３ｇ，３ｈと、これらと接する樹脂部プーリ２の内周面２ａ，２ｇ，２ｈとは、粗い面の状態で結合しているため、樹脂プーリ２にベルトテンションによって該外輪に対し円周方向に力がかかっても滑りに対する抵抗力が大きくなり、プーリ内周面と外輪外周面との相対的な滑りが生じにくくなる。
【００１８】
或いは外輪３の溝３ｆを研磨面とし、他の外周面３ｂ，３ｃ及び傾斜面（或いは側面）３ｇ，３ｈを旋削面として射出成形しても良い。この場合は、外周面３ｂ，３ｃ及び傾斜面（或いは側面）３ｇ，３ｈと、樹脂プーリ２の内周面２ｂ，２ｃ，２ｇ，２ｈとの接触面の滑りに対する抵抗力が大きくなり、プーリ内周面と外輪外周面との相対的な滑りが生じにくくなる。
【００１９】
上記第３の実施の形態においては、外輪３の外周面中央部に溝３ｆを形成する結果、外輪軌道面３ｉと溝３ｆの底面との距離が短くなり、軸受寿命上好ましくない。従って、このような外輪３に溝３ｆを設ける場合は、外輪３の肉厚が大きなものを使用する場合が良い。尚、外輪３の外周面に研磨面と旋削面を設ける場合、傾斜面（或いは側面）３ｇ，３ｈは、研磨面としても良いし旋削面としても良い。
【００２０】
【発明の効果】
以上詳述したように、この発明の軸受付樹脂製プーリによれば、外輪と樹脂プーリとの境界面との円周方向の結合力を強化してクリープを防止することができる。更に、この発明では製作コストの増大を招くことなくクリープ強度を大きくすることが可能となる。
【図面の簡単な説明】
【図１】この発明の第１の実施の形態の軸受付樹脂製プーリを示すものであって、軸方向の一部断面図である。
【図２】この発明の第１の実施の形態の軸受付樹脂製プーリを構成する外輪の一部断面図である。
【図３】この発明の第２の実施の形態の軸受付樹脂製プーリを示すものであって、軸方向の一部断面図である。
【図４】この発明の第３の実施の形態を示すものであって、軸受付樹脂製プーリの軸方向の一部断面図である。
【図５】この発明の第３の実施の形態の軸受付樹脂製プーリを構成する外輪の一部断面図である。
【符号の説明】
１ 軸受
２ 樹脂プーリ
２ａ 樹脂プーリ内周面
２ｂ，２ｃ 樹脂プーリ内周面
２ｄ，２ｅ 樹脂プーリ内周面
３ 外輪
３ａ 外輪大径部
３ｂ，３ｃ 外輪小径部
３ｄ，３ｅ 外輪傾斜面
３ｆ 外輪の凹溝
３ｇ，３ｈ 外輪の傾斜面
３ｉ 外輪軌道面[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic pulley with a bearing, which is formed integrally with a synthetic resin pulley on the outer periphery of an outer ring of a bearing and can prevent creep.
[0002]
[Prior art]
In an internal combustion engine or the like, when driving accessories such as a cooling pump and a generator for power generation, power is taken out from the internal combustion engine and these accessories are driven to rotate by belt driving. In such a belt drive, in particular, an idler pulley uses an outer ring-rotating radial ball bearing, but is usually manufactured and used as a resin-integrated pulley obtained by injection-molding a synthetic resin on the outer peripheral surface of the bearing by insert molding. You. In this way, the resin pulley of the bearing integrated type, in which the synthetic resin is integrally molded on the outer periphery of the outer ring, slides in the circumferential direction with respect to the outer ring due to belt tension, so that a so-called resin pulley is formed between the inner peripheral surface of the pulley and the outer peripheral surface of the outer ring. There is a problem that "creep" is likely to occur. In particular, when used in a relatively high temperature environment, the problem of creep tends to occur due to the difference in the coefficient of thermal expansion.
[0003]
Conventionally, various proposals have been made as measures for preventing creep between a bearing outer ring and a resin pulley. For example, in a bearing with a resin pulley formed by forming a synthetic resin pulley on the outer periphery of the bearing, the outer peripheral surface of the outer ring of the bearing is not polished and is left with a rough turning surface (for example, see Patent Document 1). ). Alternatively, in a resin pulley in which a resin layer is formed around a bearing outer ring, slip prevention means is provided on a side surface of the outer ring so that a part of the resin of the resin layer is embedded. There is a resin-made pulley with a bearing (for example, see Patent Document 2).
[0004]
[Patent Document 1]
JP-A-6-35725 [Patent Document 2]
No. 64-48469 [0005]
As described above, the synthetic resin pulley integrally formed with the bearing outer ring is designed so that the slip resistance is increased between the outer peripheral surface of the outer ring and the inner peripheral surface of the resin pulley, and that the relative slip is not generated. Is made. However, there still remains a problem that the conventional creep prevention measures do not provide a sufficient contact area or increase the number of processing steps for creep prevention, resulting in an increase in cost. Further, in the case of Patent Document 1, there is also a problem that it is difficult to obtain a highly accurate reference surface because there is no polished surface.
[0006]
The present invention has been made in order to address the above-described problems, and has as its object to provide a resin-made pulley with a bearing that does not increase the number of processing steps, accurately projects a reference surface, and is less likely to cause slippage (creep). And
[0007]
[Means for Solving the Problems]
[0008]
That is, in order to solve the above-mentioned problem, the present invention provides a resin-made pulley with a resin pulley integrally formed on the outer periphery of a bearing outer ring. The surface is characterized in that a polished surface and an unpolished turning surface are formed.
[0009]
The invention according to claim 2 is that, on the outer peripheral surface of the bearing outer ring, a convex large-diameter portion and other small-diameter portions are formed, one of which is a polished surface, and the other is an unpolished surface. It is characterized by the following.
[0010]
The invention according to claim 3 is characterized in that the outer peripheral surface of the bearing outer ring has a concave groove, one of the outer peripheral surface and the bottom of the groove is a polished surface, and the other is unpolished. Is what you do.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a resin-made pulley with a bearing according to a first embodiment of the present invention, and is a partial cross-sectional view in the axial direction. The bearing 1 includes an outer ring 3, an inner ring 4, and a rolling element (ball) 5, and seal plates 6, 6 are fitted into inner peripheral ends of the outer ring. A pulley 2 made of synthetic resin (hereinafter, referred to as a resin pulley 2) is integrally formed on the outer peripheral side of the outer ring 2 by insert molding. In this case, the resin pulley 2 is integrally formed so as to cover (cover) a part of both side surfaces of the outer ring 3.
[0012]
As shown in FIG. 2, the outer peripheral surface of the outer ring 3 of the bearing 1 has a large-diameter portion 3a in which the central portion is convex and the diameter is slightly increased, and a small-diameter portion 3b in which the diameter on both sides of the large-diameter portion 3a is slightly reduced. , 3c. Normally, the diameters of the small-diameter portions 3b and 3c are the same in order to achieve balance, but need not be the same unless it is necessary to consider the balance. When the resin pulley 2 is subjected to insert molding, the large-diameter portion 3a is polished before the insert-molding, and the small-diameter portions 3b and 3c are turned into a slightly roughened state in a state of being turned by a lathe or the like. In this case, some inclined surfaces (or side surfaces) 3d and 3e from the small diameter portions 3b and 3c to the large diameter portion 3a are not polished. The unpolished turning surface is usually a turning in the circumferential direction (the circumferential groove is provided in parallel to the direction perpendicular to the axial direction), but if it is processed so as to be in the axial direction. It is more effective because it provides greater resistance to creep.
[0013]
As described above, in the resin-made pulley with a bearing, the large-diameter portion 3a on the outer peripheral surface is a polished surface, and the small-diameter portions 3b and 3c on both sides and the inclined surface 3d from the small-diameter portions 3b and 3c to the large-diameter portion 3a are formed. The outer ring 3 having a turning surface 3e (or a side surface) is set in a pulley die and injection molded. If only the large-diameter portion 3a on the outer peripheral surface of the outer ring 3 is a polished surface and the other is a turning surface, the small-diameter portions 3b and 3c and the inclined surfaces (or side surfaces) 3d and 3e, and the resin pulley 2 in contact therewith. The inner peripheral surfaces 2b, 2c, 2d, and 2e are joined in a rough surface state, so that even if a force is applied to the outer ring by the belt tension on the resin pulley 2 in the circumferential direction, the resistance to slippage is reduced. As a result, relative slip between the inner peripheral surface of the pulley and the outer peripheral surface of the outer ring is less likely to occur. Further, since the large diameter portion 3a is provided at a portion corresponding to the raceway bottom of the outer ring 3, the thickness is relatively large with respect to the small diameter portions 3b and 3c. Can effectively be prevented from being deformed, and the deterioration of the bearing function can be prevented. The polishing of a part of the outer peripheral surface of the outer race 3 is a necessary process because it serves as a reference surface when forming (working and polishing) the raceway surface.
[0014]
Next, FIG. 3 shows a second embodiment of the present invention, and is a partial cross-sectional view in the axial direction of a resin-made pulley with a bearing. Also in this embodiment, the outer peripheral surface of the outer ring 3 of the bearing 1 has a large-diameter portion 3a in which the central portion is convex and the diameter is slightly increased, and a small-diameter portion 3b in which the diameter on both sides of the large-diameter portion 3a is slightly reduced. , 3c. When the resin pulley 2 is subjected to insert molding, the small diameter portions 3b and 3c are polished (or only one of the small diameter portions 3b and 3c may be polished) before the insert molding, and the large diameter portion 3a and the small diameter portions 3b and 3c are polished. The inclined surfaces (or side surfaces) 3d, 3e from the to the large diameter portion 3a are in a state of a slightly rough surface (unpolished) as it is after being turned by a lathe or the like.
[0015]
The outer ring 3 having the above configuration is set in a pulley die and injection-molded. As described above, when the small diameter portions 3b and 3c (or one of them) on the outer peripheral surface of the outer ring 3 are polished surfaces and the other is a turning surface, the large diameter portion 3a and the inclined surfaces (or side surfaces) 3d and 3e The inner peripheral surfaces 2a, 2d, and 2e of the resin pulley 2 that are in contact with the outer ring are bonded to each other in a rough surface state. The resistance is increased, and relative slip between the inner peripheral surface of the pulley and the outer peripheral surface of the outer ring is less likely to occur. In the first and second embodiments, the inclined surfaces (or side surfaces) 3d and 3e may be polished surfaces.
[0016]
Next, FIG. 4 shows a third embodiment of the present invention, and is a partial sectional view in the axial direction of a resin-made pulley with a bearing. In this embodiment, the outer ring 3 of the bearing 1 is formed with a concave portion having a reduced diameter, that is, a groove 3f at the center of the outer peripheral surface, and the diameter of both side surfaces 3b and 3c of the groove 3f is larger than that of the groove 3f. It is formed. The inclined surfaces (or side surfaces) 3g and 3h extending from the surface of the groove 3f and the grooves 3f to the large-diameter surfaces 3b and 3c are turned surfaces, and the large-diameter surfaces 3b and 3c are polished surfaces.
[0017]
When the outer ring 3 having the above configuration is set in a pulley mold and injection molded to produce a resin pulley 2, the groove 3 f and the inclined surfaces (or side surfaces) 3 g and 3 h of the outer ring 3 and the resin pulley 2 in contact therewith are formed. The inner peripheral surfaces 2a, 2g, and 2h are joined in a rough surface state, so that even if a force is applied to the outer ring by the belt tension on the resin pulley 2 in the circumferential direction, the resistance to slip increases. In addition, relative slip between the inner peripheral surface of the pulley and the outer peripheral surface of the outer ring hardly occurs.
[0018]
Alternatively, injection molding may be performed with the groove 3f of the outer ring 3 as a polished surface and the other outer peripheral surfaces 3b and 3c and the inclined surfaces (or side surfaces) 3g and 3h as turning surfaces. In this case, the resistance to the sliding of the contact surfaces between the outer peripheral surfaces 3b, 3c and the inclined surfaces (or side surfaces) 3g, 3h and the inner peripheral surfaces 2b, 2c, 2g, 2h of the resin pulley 2 becomes large, and the inside of the pulley becomes large. Relative sliding between the peripheral surface and the outer peripheral surface of the outer ring is less likely to occur.
[0019]
In the third embodiment, as a result of forming the groove 3f at the center of the outer peripheral surface of the outer ring 3, the distance between the outer ring raceway surface 3i and the bottom surface of the groove 3f is shortened, which is not preferable in terms of bearing life. Therefore, when the outer ring 3 is provided with the groove 3f, the outer ring 3 having a large thickness is preferably used. When a polished surface and a turned surface are provided on the outer peripheral surface of the outer ring 3, the inclined surfaces (or side surfaces) 3g and 3h may be polished surfaces or turned surfaces.
[0020]
【The invention's effect】
As described in detail above, according to the resin-made pulley with a bearing of the present invention, the creep can be prevented by strengthening the circumferential coupling force between the outer ring and the boundary surface between the resin pulley. Further, according to the present invention, it is possible to increase the creep strength without increasing the manufacturing cost.
[Brief description of the drawings]
FIG. 1 is a partial sectional view in the axial direction, showing a resin-made pulley with a bearing according to a first embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of an outer ring constituting the resin-made pulley with a bearing according to the first embodiment of the present invention.
FIG. 3 is a partial sectional view in the axial direction of a resin-made pulley with a bearing according to a second embodiment of the present invention.
FIG. 4 shows a third embodiment of the present invention, and is a partial cross-sectional view in the axial direction of a resin-made pulley with a bearing.
FIG. 5 is a partial sectional view of an outer ring constituting a resin-made pulley with a bearing according to a third embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bearing 2 Resin pulley 2a Resin pulley inner peripheral surface 2b, 2c Resin pulley inner peripheral surface 2d, 2e Resin pulley inner peripheral surface 3 Outer ring 3a Outer ring large diameter portion 3b, 3c Outer ring small diameter portion 3d, 3e Outer ring inclined surface 3f Concave of outer ring Grooves 3g, 3h Inclined surface of outer ring 3i Outer ring raceway surface

Claims (3)

軸受外輪の外周に樹脂製プーリを一体成形してなる軸受付樹脂製プーリにおいて、
前記軸受外輪の外周面を、研磨面と未研磨の旋削面とで形成したことを特徴とする軸受付樹脂製プーリ。In a resin pulley with a bearing formed by integrally molding a resin pulley on the outer periphery of the bearing outer ring,
A resin-made pulley with a bearing, wherein an outer peripheral surface of the bearing outer ring is formed of a polished surface and an unpolished turning surface. 前記軸受外輪の外周面には、凸状の大径部とそれ以外の小径部とを形成し、一方を研磨面とし、他方を未研磨面としたことを特徴とする請求項１に記載の軸受付樹脂製プーリ。The convex outer large-diameter portion and the other small-diameter portion are formed on the outer peripheral surface of the bearing outer ring, one of which is a polished surface and the other is an unpolished surface. Resin pulley with bearing. 前記軸受外輪の外周面は凹状の溝を形成し、外周面または溝の底のいずれか一方を研磨面とし、他方を未研磨としたことを特徴とする請求項１に記載の軸受付樹脂製プーリ。The resin-made bearing bearing according to claim 1, wherein a concave groove is formed on an outer peripheral surface of the bearing outer ring, one of the outer peripheral surface and the bottom of the groove is a polished surface, and the other is unpolished. Pulley.
JP2002330259A 2002-11-14 2002-11-14 Pulley made of resin with bearing Pending JP2004162830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002330259A JP2004162830A (en) 2002-11-14 2002-11-14 Pulley made of resin with bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002330259A JP2004162830A (en) 2002-11-14 2002-11-14 Pulley made of resin with bearing

Publications (1)

Publication Number Publication Date
JP2004162830A true JP2004162830A (en) 2004-06-10

Family

ID=32807999

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002330259A Pending JP2004162830A (en) 2002-11-14 2002-11-14 Pulley made of resin with bearing

Country Status (1)

Country Link
JP (1) JP2004162830A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008074743A1 (en) * 2006-12-16 2008-06-26 Schaeffler Kg Roller for a traction mechanism drive
WO2009017057A1 (en) * 2007-07-30 2009-02-05 Ntn Corporation Bearing with resin pulley
JP2009068640A (en) * 2007-09-14 2009-04-02 Ntn Corp Bearing with resin pulley
JP2010084817A (en) * 2008-09-30 2010-04-15 Ntn Corp Bearing with resin pulley and method of manufacturing the same
JP2020125850A (en) * 2015-11-16 2020-08-20 株式会社ジェイテクト Deep groove ball bearing and formation method of creep suppression annular groove

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008074743A1 (en) * 2006-12-16 2008-06-26 Schaeffler Kg Roller for a traction mechanism drive
DE102006059562A1 (en) * 2006-12-16 2008-06-26 Schaeffler Kg Roller for a traction drive
WO2009017057A1 (en) * 2007-07-30 2009-02-05 Ntn Corporation Bearing with resin pulley
JP2009068640A (en) * 2007-09-14 2009-04-02 Ntn Corp Bearing with resin pulley
JP2010084817A (en) * 2008-09-30 2010-04-15 Ntn Corp Bearing with resin pulley and method of manufacturing the same
JP2020125850A (en) * 2015-11-16 2020-08-20 株式会社ジェイテクト Deep groove ball bearing and formation method of creep suppression annular groove

Similar Documents

Publication Publication Date Title
CN107642594B (en) Double body formed pulley with reduced radial bearing deformation characteristics
US20080011266A1 (en) Device For Transmitting A Torque And Method For Producing A Device For Transmitting A Torque
JP2003207032A (en) Rotor
JP5117977B2 (en) Bearing with resin pulley and manufacturing method thereof
JP2008249131A (en) Resin-wound component
JP2004028275A (en) Bearing integrated type resin pulley
US20010045784A1 (en) Rotary electric machine
JP2004162830A (en) Pulley made of resin with bearing
JP2006329368A (en) Bearing for resin pulley
JP4298713B2 (en) Spherical plain bearing
JPH09151954A (en) Constant velocity universal joint
JP2001355711A (en) Resin pulley
CN112105843A (en) Pulley decoupler with injection molded belt track, plain bearing and axial friction ring and method of making same
JP2004270774A (en) Pulley with bearing
JP4129630B2 (en) Resin pulley with bearing
JP2003065424A (en) Method for manufacturing bearing with resin-made pulley and outer ring of bearing
JPS6140983Y2 (en)
JP2004162858A (en) Bearing with resin pulley
JP2005325924A (en) Sealing device
JP2002221271A (en) Bearing with resinous pulley
JP2009108959A (en) Bearing with plastic pulley
JP4165157B2 (en) Rolling bearing and manufacturing method of rolling bearing
JP2004232470A (en) Water pump and its manufacturing method
JP2011137517A (en) Resin pulley
JP2009138766A (en) Bearing with plastic pulley

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050708

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080430

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080430

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080630

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20081001