JP2004232839A - Resin pulley with bearing - Google Patents

Resin pulley with bearing Download PDF

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Publication number
JP2004232839A
JP2004232839A JP2003025467A JP2003025467A JP2004232839A JP 2004232839 A JP2004232839 A JP 2004232839A JP 2003025467 A JP2003025467 A JP 2003025467A JP 2003025467 A JP2003025467 A JP 2003025467A JP 2004232839 A JP2004232839 A JP 2004232839A
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Japan
Prior art keywords
resin
bearing
pulley
outer race
rolling element
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Granted
Application number
JP2003025467A
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Japanese (ja)
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JP4129630B2 (en
Inventor
Kunihiro Yamaguchi
晋弘 山口
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/588—Races of sheet metal
    • 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
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/63—Gears with belts and pulleys

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin pulley with bearing that excels in the radiation effect and can reduce a production cost as well. <P>SOLUTION: A circular arc sectioned groove 1a for the raceway for a roller is formed on an inner circumference face on an outer race 1 made of a sheet metal and a circular arc sectioned groove 2a for the raceway for the roller is formed on an inner race 2 of a sheet metal corresponding to the groove 1a for the raceway for the roller of the outer race 1 and a plurality of rolling movers 3 arranged among both grooves for the raceways for the roller are arranged and a resin pulley part 4 is formed unitedly to the above outer race circumference. Also, the flange part 1c, 1d bending on an outside diameter is formed at the edge section of the above outer race so as to cover a part of the side face of the resin pulley part 4 and a sealing member 9 with the core metal is arranged among both end parts of the above inner/outer races. <P>COPYRIGHT: (C)2004,JPO&NCIPI

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回転中発生する熱のこもりを防止し、軸受寿命の延長を図ることの出来る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、通常軸受の外輪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軸受付き軸受付樹脂製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付き樹脂製プーリは、内燃機関周囲に配置され、回転中の熱の発生により潤滑剤の劣化や消耗により寿命低下が問題となっている。
【０００３】
従来から軸受付き樹脂製プーリの上記問題を解決するため種々の提案がなされている。例えば、図３に示すように、内転動体案内部材１２とこれを組み込んだ樹脂成形品の内樹脂製ケース１３とで構成される内輪１４と、外転動体案内部材１５とこれを組み込んだ樹脂成形品の外樹脂製ケース１６とで構成される外輪１７と、前記内転動体案内部材１２と外転動体案内部材１５との間に複数の球状転動体１８が配設されたもので、前記内転動体案内部材１２と外転動体案内部材１５とは、中空円筒体の長手方向で、且つ、その中央部に転動溝（１２ａ，１５ａ）を有すると共に、中空円筒体の一方端で、その端部を曲折して成る鍔１２ｂ、１５ｂに樹脂ケース１３、１６に組み込まれる際の樹脂の滑り止めを有する形態が一体にプレス成形された樹脂製プーリ付き軸受が提案されている（特許文献１参照）。
或いは、樹脂製のプーリ本体２０のボス部２１の内周面に放熱用金属板３０の円筒部３１を露出させ、その円筒部３１の一端に内フランジ部３１ａを形成して、円筒部３１および内フランジ部３１ａにおいて転がり軸受１０の外輪２５の外周面２５ａおよび端面２２ｂの双方に密着させた状態で、放熱金属板３０のフランジ部３２の少なくとも一部をプーリ本体２０のウエブ部２３において外部に露出させることで、放熱金属板３０を外輪２５に対して大きな面積のもとに接触させて転がり軸受１内の熱を効率よく放熱し、プーリ本体２０のボス部２１とリム部２２はウエブ部２３に不連続部分を設けることなくその全面で繋がった構造とすることで、射出成形時にウェルドが発生する可能性を低減する構成の樹脂製プーリが提案されている（特許文献２参照）。
【０００４】
【特許文献１】
特開２００２−３９１９３
【特許文献２】
特開２００１−３５５７１１
【０００５】
【発明が解決しようとする課題】
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、熱によるグリースの劣化或いは洩れにより寿命が低下するという問題がある。また、加工部分が多く、軸受製作に要する製造コストが高い、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、放熱効果に優れ、製造コストも低減できる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、内周面に断面円弧状の転動体軌道用溝を形成した板金製外輪と、該外輪の転動体軌道用溝に対応する断面円弧状の転動体軌道用溝を外周面に形成した内輪と、これら両軌道用溝間に配設される複数の転動体と、前記外輪外周に一体形成される樹脂プーリ部とを備え、前記外輪端部に樹脂プーリ側面部の一部を覆うように外径側に曲折されるフランジ部を形成し、前記内・外輪の両端部間に芯金付き密封部材を配置したことを特徴としている。
【０００９】
【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。この軸受付樹脂製プーリは、外輪１と、内輪２と転動体（玉）３と、前記外輪外周側に樹脂をモールド成形により一体に形成された樹脂プーリ部４と、で構成されている。尚、前記転動体３は、周方向一定間隔に保持器（図示省略）により保持されている。また、前記樹脂プーリ部４外周には、ベルト（図示省略）を係止させるためのＶ溝４ａ，４ａ，・・が形成され、外輪１が該樹脂プーリ部４と一体に回転するようにしてある。
【００１０】
前記外輪１は、板金によりプレス成形して製作される。即ち、該外輪１は、プレス成形により、内周面に断面円弧状の転動体軌道用溝１ａが形成されると共に、該外輪端部には、樹脂プーリ部４の側面部の一部を覆うように外径側に曲折されフランジ部１ｃ，１ｄが形成される。このように、前記樹脂プーリ部４では、外輪１の端部にフランジ部１ｃ，１ｄがその端面をむき出した状態で形成され、樹脂プーリ部４を一体にモールドされている。該外輪１と樹脂プーリ部４をこのように構成することにより回転中に発生する熱の放熱効果が良くなる。
【００１１】
次に、内輪２は、前記外輪１と同様に、板金製をプレス整形することによって製作され、外周には前記外輪の転動体軌道用溝１ａに対応する断面円弧状の転動体軌道用溝２ａが形成されている。そして一方の端部には、径内側方向にフランジ部２ｂが形成されている。該内輪２の内部には、フランジ部２ｂに当接するよう軸５が嵌め入れてあり外側から座金６をおいてボルト７でこれら内輪２と軸５とを固定する。
【００１２】
上記するように、前記外輪１及び内輪２は、板金をプレス成形したものであり、外輪１の内周面の転動体軌道用溝１ａおよび内輪２の外周面の転動体軌道用溝２ａは、転動体３が配置されるため真円度を確保しなければならない。従って、いずれも軸受として組み立てる前に研磨加工ある対は超仕上げ加工する。
【００１３】
前記外輪１と内輪２との間の環状空間８には、転動体３を間において芯金付き密封部材９，９が配置してある。この芯金付き密封部材９は、図２に示すように、芯金９ａと、該芯金９ａに焼付けたゴムシール部９ｂと、より構成され、芯金９ａは内輪２の外周面２ｃに圧入され、ゴムシール部９ｂは、外輪１の内周面１ｅに接触させるか、或いはラビリンス構造となるようにする。
【００１４】
上記するように、この発明の軸受付き樹脂製プーリは、上記構成とすることにより、比較的加工工数が少なく且つ放熱効果に優れた軸受付き樹脂製プーリとすることができる。また、外輪および内輪には密封部材の芯金用の溝加工等必要でなく、安価に製作することが可能となる。
【００１５】
【発明の効果】
以上、詳述したように、この発明の軸受付き樹脂製プーリによれば、回転中に発生する熱のこもりを防止し、また、グリースの劣化を防ぎ寿命の低下を防止する樹脂製プーリを提供することができる。更に、プレス加工することにより加工工数を低減し製造コストの低減を図ることができる。
【図面の簡単な説明】
【図１】この発明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】この発明の軸受付樹脂製プーリの外輪と内輪との間の環状空間に配置される密封部材の配置状態を示す図である。
【図３】従来の軸受付樹脂製プーリの軸方向の一部断面図である。
【図４】従来の軸受付樹脂製プーリの軸方向の一部断面図である。
【符号の説明】
１ 外輪（板金製）
１ａ 転動体用軌道用の断面円弧状の溝
１ｃ フランジ部
１ｄ フランジ部
２ 内輪（板金製）
２ａ 転動体用軌道用の断面円弧状の溝
２ｂ フランジ部
３ 転動体（玉）
４ 樹脂プーリ部
５ 軸
９ 密封部材[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin-made pulley with a bearing, which is integrally formed with a synthetic resin pulley on the outer periphery of an outer ring of a bearing, prevents heat buildup generated during rotation, and extends the life of the bearing.
[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, especially for the idler pulley, a radial ball bearing rotating the outer ring is used. Usually, a resin-integrated resin-bearing resin bearing is formed by injection-molding a synthetic resin on the outer peripheral surface of the outer ring of the bearing by insert molding. Manufactured and used as pulleys. The resin-made pulley with a bearing in which the synthetic resin is integrally molded on the outer periphery of the outer ring as described above is disposed around the internal combustion engine, and the generation of heat during rotation causes deterioration and wear of the lubricant, which causes a problem of shortening the service life.
[0003]
Conventionally, various proposals have been made to solve the above-mentioned problem of the resin-made pulley with a bearing. For example, as shown in FIG. 3, an inner race 14 composed of an inner rolling member guide member 12 and an inner resin case 13 of a resin molded product incorporating the inner rolling member guide member, an outer rolling member guide member 15, and a resin incorporating the same. A plurality of spherical rolling elements 18 are disposed between an outer race 17 constituted by an outer resin case 16 of a molded product and the inner rolling element guide member 12 and the outer rolling element guide member 15. The inner rolling element guide member 12 and the outer rolling element guide member 15 have rolling grooves (12a, 15a) in the longitudinal direction of the hollow cylindrical body and at the center thereof, and at one end of the hollow cylindrical body, A bearing with a resin pulley has been proposed in which a form in which the flanges 12b and 15b formed by bending the ends thereof have a resin non-slip when incorporated into the resin cases 13 and 16 is integrally press-molded (Patent Document 1). 1).
Alternatively, the cylindrical portion 31 of the heat-dissipating metal plate 30 is exposed on the inner peripheral surface of the boss portion 21 of the resin-made pulley body 20, and an inner flange portion 31 a is formed at one end of the cylindrical portion 31. At least a part of the flange portion 32 of the heat dissipating metal plate 30 is externally attached to the web portion 23 of the pulley main body 20 in a state where the inner flange portion 31 a is in close contact with both the outer peripheral surface 25 a and the end surface 22 b of the outer ring 25 of the rolling bearing 10. By exposing, the heat dissipating metal plate 30 is brought into contact with the outer ring 25 under a large area to efficiently dissipate the heat inside the rolling bearing 1, and the boss portion 21 and the rim portion 22 of the pulley body 20 A resin pulley has been proposed that has a structure in which the entire surface of the pulley 23 is connected without providing a discontinuous portion, thereby reducing the possibility of occurrence of weld during injection molding. See Patent Document 2).
[0004]
[Patent Document 1]
JP-A-2002-39193
[Patent Document 2]
JP-A-2001-355711
[0005]
[Problems to be solved by the invention]
As described above, the synthetic resin pulley integrally formed with the bearing outer ring has a problem that the life of the pulley is deteriorated due to deterioration or leakage of the grease due to heat. In addition, there is also a problem that there are many processed parts and the manufacturing cost required for manufacturing the bearing is high.
[0006]
The present invention has been made in order to address the above-described problem, and has as its object to provide a resin-made pulley with a bearing that has an excellent heat radiation effect and can be manufactured at a reduced cost.
[0007]
[Means for Solving the Problems]
[0008]
That is, in order to solve the above-mentioned problems, the present invention provides a sheet metal outer ring having a rolling element raceway groove having an arc-shaped cross section on an inner peripheral surface, and a rolling element of the outer ring. A rolling element having an arc-shaped cross section corresponding to the raceway groove is formed on the outer peripheral surface of the inner race, a plurality of rolling elements disposed between the raceway grooves, and a resin integrally formed on the outer race outer periphery. A pulley portion, a flange portion bent to the outer diameter side to cover a part of the resin pulley side surface portion at the outer ring end portion, and a sealing member with a cored bar between both end portions of the inner and outer rings. It is characterized by being arranged.
[0009]
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 of the present invention, and is a partial sectional view in the axial direction. This resin-made pulley with a bearing is composed of an outer ring 1, an inner ring 2, a rolling element (ball) 3, and a resin pulley portion 4 in which resin is integrally formed on the outer peripheral side of the outer ring by molding. The rolling elements 3 are held at regular intervals in the circumferential direction by a holder (not shown). V-grooves 4a, 4a,... For locking a belt (not shown) are formed on the outer periphery of the resin pulley portion 4 so that the outer ring 1 rotates integrally with the resin pulley portion 4. is there.
[0010]
The outer race 1 is manufactured by press-molding a sheet metal. That is, the outer race 1 is formed with a rolling element raceway groove 1a having an arc-shaped cross section on the inner peripheral surface by press forming, and a part of the side surface of the resin pulley portion 4 is covered at the outer race end. Is bent to the outer diameter side to form the flange portions 1c and 1d. As described above, in the resin pulley portion 4, the flange portions 1c and 1d are formed at the ends of the outer race 1 with their end surfaces exposed, and the resin pulley portion 4 is integrally molded. By configuring the outer race 1 and the resin pulley portion 4 in this manner, the heat radiation effect of heat generated during rotation is improved.
[0011]
Next, similarly to the outer ring 1, the inner race 2 is manufactured by press-forming a sheet metal, and the outer periphery has a rolling element raceway groove 2a having an arc-shaped cross section corresponding to the rolling element raceway groove 1a of the outer race. Is formed. A flange 2b is formed at one end in a radially inner direction. A shaft 5 is fitted inside the inner ring 2 so as to abut against the flange portion 2b, and a washer 6 is fixed from outside to fix the inner ring 2 and the shaft 5 with bolts 7.
[0012]
As described above, the outer race 1 and the inner race 2 are formed by pressing a sheet metal, and the rolling element raceway groove 1a on the inner peripheral surface of the outer race 1 and the rolling element raceway groove 2a on the outer peripheral surface of the inner race 2 are formed as follows. Since the rolling elements 3 are arranged, roundness must be ensured. Therefore, a pair with a polishing process is super-finished before being assembled as a bearing.
[0013]
In the annular space 8 between the outer ring 1 and the inner ring 2, sealing members 9 with a metal core are arranged with the rolling element 3 therebetween. As shown in FIG. 2, the cored sealing member 9 is composed of a cored bar 9a and a rubber seal portion 9b baked on the cored bar 9a. The cored bar 9a is pressed into the outer peripheral surface 2c of the inner race 2. The rubber seal portion 9b is brought into contact with the inner peripheral surface 1e of the outer race 1 or has a labyrinth structure.
[0014]
As described above, the resin-made pulley with a bearing of the present invention can be a resin-made pulley with a bearing having a relatively small number of processing steps and an excellent heat radiation effect by adopting the above configuration. Further, the outer ring and the inner ring do not require a groove or the like for the core of the sealing member, and can be manufactured at low cost.
[0015]
【The invention's effect】
As described above in detail, according to the resin-made pulley with a bearing of the present invention, a resin-made pulley that prevents heat buildup generated during rotation, prevents deterioration of grease, and prevents a reduction in life is provided. can do. Further, by performing the press working, the number of processing steps can be reduced and the manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 shows a resin-made pulley with a bearing of the present invention and is a partial cross-sectional view in the axial direction.
FIG. 2 is a view showing an arrangement state of a sealing member arranged in an annular space between an outer ring and an inner ring of the resin-made pulley with bearing of the present invention.
FIG. 3 is a partial sectional view in the axial direction of a conventional resin-made pulley with a bearing.
FIG. 4 is a partial sectional view in the axial direction of a conventional resin-made pulley with a bearing.
[Explanation of symbols]
1 outer ring (made of sheet metal)
1a A groove having a circular cross section for a raceway for rolling elements 1c Flange 1d Flange 2 Inner ring (made of sheet metal)
2a groove with a circular cross section for the raceway for rolling element 2b flange 3 rolling element (ball)
4 Resin pulley 5 Shaft 9 Sealing member

Claims (1)

内周面に断面円弧状の転動体軌道用溝を形成した板金製外輪と、該外輪の転動体軌道用溝に対応する断面円弧状の転動体軌道用溝を外周面に形成した内輪と、これら両軌道用溝間に配設される複数の転動体と、前記外輪外周に一体形成される樹脂プーリ部とを備え、前記外輪端部に樹脂プーリ側面部の一部を覆うように外径側に曲折されるフランジ部を形成し、前記内・外輪の両端部間に芯金付き密封部材を配置したことを特徴とする軸受付樹脂製プーリAn outer ring made of sheet metal formed with a rolling element raceway groove having an arc-shaped cross section on the inner peripheral surface, and an inner ring formed with a rolling element raceway groove having an arc-shaped cross section corresponding to the rolling element raceway groove of the outer ring, A plurality of rolling elements disposed between the two raceway grooves; and a resin pulley portion integrally formed on the outer periphery of the outer race, and an outer diameter of the outer race end portion covering an end of the side surface of the resin pulley. A resin-made pulley with a bearing, wherein a flange portion bent to the side is formed, and a sealing member with a metal core is disposed between both end portions of the inner and outer rings.
JP2003025467A 2003-02-03 2003-02-03 Resin pulley with bearing Expired - Fee Related JP4129630B2 (en)

Priority Applications (1)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006059562A1 (en) * 2006-12-16 2008-06-26 Schaeffler Kg Roller for a traction drive
JP2009506267A (en) * 2005-08-23 2009-02-12 カイペル ゲーエムベーハー アンド カンパニー カーゲー Vehicle gear stage unit
WO2009093539A1 (en) * 2008-01-22 2009-07-30 Ntn Corporation Bearing with resin pulley
KR100963913B1 (en) * 2008-08-05 2010-06-17 학교법인 두원학원 A clutchless pully assembly for compressor
JP2021134811A (en) * 2020-02-25 2021-09-13 株式会社不二越 Electromagnetic noise countermeasure bearing with seal
US20220290721A1 (en) * 2021-03-12 2022-09-15 Aktiebolaget Skf Pulley assembly

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009506267A (en) * 2005-08-23 2009-02-12 カイペル ゲーエムベーハー アンド カンパニー カーゲー Vehicle gear stage unit
KR101312616B1 (en) 2005-08-23 2013-09-30 카이퍼 게엠베하 운트 코. 카게 Eccentricity gear step
DE102006059562A1 (en) * 2006-12-16 2008-06-26 Schaeffler Kg Roller for a traction drive
WO2009093539A1 (en) * 2008-01-22 2009-07-30 Ntn Corporation Bearing with resin pulley
KR100963913B1 (en) * 2008-08-05 2010-06-17 학교법인 두원학원 A clutchless pully assembly for compressor
JP2021134811A (en) * 2020-02-25 2021-09-13 株式会社不二越 Electromagnetic noise countermeasure bearing with seal
US20220290721A1 (en) * 2021-03-12 2022-09-15 Aktiebolaget Skf Pulley assembly
US11732755B2 (en) * 2021-03-12 2023-08-22 Aktiebolaget Skf Pulley assembly

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