JP2001165281A - Synthetic resin pulley - Google Patents
Synthetic resin pulleyInfo
- Publication number
- JP2001165281A JP2001165281A JP37658799A JP37658799A JP2001165281A JP 2001165281 A JP2001165281 A JP 2001165281A JP 37658799 A JP37658799 A JP 37658799A JP 37658799 A JP37658799 A JP 37658799A JP 2001165281 A JP2001165281 A JP 2001165281A
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- bearing
- ribs
- resin pulley
- integral multiple
- 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
Links
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 28
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 28
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
- 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
- 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
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
- F16C19/527—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to vibration and noise
-
- 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
-
- 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
- F16C33/32—Balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pulleys (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば自動車エン
ジン補機用に使用される転がり軸受付合成樹脂製プーリ
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin pulley with a rolling bearing used, for example, for automobile engine accessories.
【０００２】[0002]
【従来の技術】近年、エンジン補機用のテンショナプー
リやアイドラプーリには、軽量化やベルトの摺動抵抗の
低減、さらにコストダウンを目的に、合成樹脂製プーリ
が使用されている。そして従来の合成樹脂製プーリとし
て、例えば特開平７−６３２４９号のものが知られてい
る。このものは、内側円筒部と、内側円筒部から径方向
に離間されかつ円板部で結合されたベルト案内用の外側
円筒部、および円板部の円周側面上で放射状に形成され
た複数のリブとを有する合成樹脂本体部が、転がり軸受
の外輪外周面に一体成形された構成である。ここで、上
記リブは、合成樹脂製プーリが金属製プーリに比較して
強度や剛性が低いため、これらの強度アップや剛性アッ
プを目的に円板部の円周側面に形成されている。2. Description of the Related Art In recent years, synthetic resin pulleys have been used as tensioner pulleys and idler pulleys for engine accessories for the purpose of weight reduction, reduction of belt sliding resistance, and cost reduction. As a conventional synthetic resin pulley, for example, Japanese Patent Application Laid-Open No. 7-63249 is known. This includes an inner cylindrical portion, an outer cylindrical portion for guiding the belt which is radially separated from the inner cylindrical portion and is connected by a disk portion, and a plurality of radially formed radial surfaces on the circumferential side surface of the disk portion. And a synthetic resin main body having ribs formed integrally with the outer peripheral surface of the outer ring of the rolling bearing. Here, since the synthetic resin pulley has lower strength and rigidity than the metal pulley, the rib is formed on the circumferential side surface of the disk portion for the purpose of increasing the strength and rigidity.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の合成樹脂製
プーリにおいては、射出成形にて製作する場合、強度ア
ップや剛性アップのために形成したリブ部での射出圧が
原因となって、リブの位置でリブと同数だけ軸受の外輪
内径に一定間隔の変形すなわちうねりの山が発生し、転
がり軸受回転中に振動や音が発生し、合成樹脂製プーリ
の精度低下につながる。この振動や音は、うねりの山数
すなわちリブ数が転動体数の整数倍、及び整数倍±１の
時に発生することが推定される。このことは以下の公知
の内容からも理解される。In the above-mentioned conventional synthetic resin pulley, when it is manufactured by injection molding, the injection pressure at the rib portion formed for increasing the strength and rigidity causes the rib. In this position, the same number of ribs as the number of ribs causes deformation of the outer ring inner diameter of the bearing at regular intervals, that is, undulation peaks, and vibrations and noises are generated during the rotation of the rolling bearing, leading to a decrease in accuracy of the synthetic resin pulley. It is presumed that this vibration or sound is generated when the number of undulations, that is, the number of ribs is an integral multiple of the number of rolling elements and an integral multiple of ± 1. This can be understood from the following known contents.
【０００４】すなわち、一般に軌道輪のうねりの山数と
転動体数との関係による軸受振動の発生は例えば「転が
り軸受工学」−転がり軸受工学編集委員会−（養賢堂、
昭和５０年７月１０日発行）にて次のように記載されて
いる。例えば図３（Ａ），（Ｂ），（Ｃ）（同文献記載
図）は、玉軸受の内輪１０にそれぞれうねりが、ｎｚ−
１山（図３（Ａ）），ｎｚ山（図３（Ｂ）），ｎｚ＋１
山（図３（Ｃ））のときの外輪１１の半径方向振動の発
生機構の説明図であり、記号１の玉１２が図３（Ａ），
（Ｂ），（Ｃ）ともうねりの山１３に接触している場合
を示す。ここでｚは玉数でｎは整数である。このとき、
ｎｚ山（図３（Ｂ））のうねりの場合、外輪１１の半径
方向の動きを生じないが、ｎｚ−１山（図３（Ａ））及
びｎｚ＋１山（図３（Ｃ））のうねりの場合、外輪１１
を矢印方向（半径方向）に最も移動させることが知られ
ている。従って、外輪１１の半径方向振動が生ずるの
は、内輪１０のうねりがｎｚ±１であることが知られて
いる。なお、記号１の玉１３がうねりの谷に接触する場
合も上記と同様である。That is, in general, the occurrence of bearing vibrations due to the relationship between the number of undulations of the bearing ring and the number of rolling elements is described in, for example, "Rolling Bearing Engineering" -Rolling Bearing Engineering Editing Committee- (Yokendo,
(Issued July 10, 1975), it is described as follows. For example, FIGS. 3A, 3B, and 3C (described in the same document) show that the undulations on the inner ring 10 of the ball bearing are nz-.
1 mountain (FIG. 3A), nz mountain (FIG. 3B), nz + 1
FIG. 3 is an explanatory view of a mechanism for generating a radial vibration of the outer ring 11 at the time of a mountain (FIG. 3 (C)).
(B), (C) and the case where it contacts the undulation mountain 13 is shown. Here, z is the number of balls and n is an integer. At this time,
In the case of the undulation of the nz peak (FIG. 3B), the outer ring 11 does not move in the radial direction, but the nz-1 peak (FIG. 3A) and the nz + 1 peak (FIG. 3C). In case, outer ring 11
Is most moved in the arrow direction (radial direction). Therefore, it is known that the radial vibration of the outer ring 11 occurs when the undulation of the inner ring 10 is nz ± 1. The same applies to the case where the ball 13 of symbol 1 contacts the undulation valley.
【０００５】さらに、同文献において、次のことも知ら
れている。すなわち、図４（Ａ）（同文献記載図）はす
べての玉１２が内輪１０のうねりの山１３に接触し、図
４（Ｂ）（同文献記載図）はすべての玉１２が内輪１０
のうねりの谷１４に接触している場合である。このｎｚ
山のうねりの山１３と谷１４が交互に玉１３と接触する
が、このとき、軸受のラジアルすきまが変化して軸受の
接触角αが変化し、外輪１１が矢印方向（軸方向）に振
動することが知られている。Further, the following is also known in the same document. That is, in FIG. 4A (described in the document), all the balls 12 contact the undulating ridges 13 of the inner ring 10, and in FIG.
In this case, the valley 14 is in contact with the undulation valley 14. This nz
The peaks 13 and the valleys 14 of the swell of the mountain alternately contact the ball 13. At this time, the radial clearance of the bearing changes, the contact angle α of the bearing changes, and the outer ring 11 vibrates in the direction of the arrow (axial direction). It is known to
【０００６】このことから、軌道輪のうねりの山の数
が、玉数ｚの整数倍ｎ、及び整数倍ｎ±１の時に、軸受
が回転中に軌道輪が振動し、音が発生することがわか
る。Therefore, when the number of undulation peaks of the bearing ring is an integer multiple n of the number of balls z and an integer multiple n ± 1, the bearing ring vibrates while the bearing is rotating, and noise is generated. I understand.
【０００７】本発明は、リブによる強度や剛性を維持し
ながら転がり軸受の振動や音の発生が防止され、精度の
よい合成樹脂製プーリを提供することを目的とする。An object of the present invention is to provide a highly accurate synthetic resin pulley in which vibration and noise of a rolling bearing are prevented while maintaining the strength and rigidity of a rib.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決する手段
として、内側円筒部と、内側円筒部から径方向に離隔さ
れかつ円板部で結合されたベルト案内用の外側円筒部、
および円板部の円周側面上で放射状に形成された複数の
リブとを有する合成樹脂本体部が、転がり軸受の外輪外
周面に一体成形された合成樹脂製プーリにおいて、上記
リブ数が、軸受の転動体数の整数倍、及び整数倍±１を
回避する数に設定されていることを特徴とする。As means for solving the above-mentioned problems, there are provided an inner cylindrical portion, an outer cylindrical portion for belt guide which is radially separated from the inner cylindrical portion and connected by a disk portion,
And a synthetic resin pulley in which a synthetic resin body having a plurality of ribs radially formed on a circumferential side surface of the disk portion is integrally formed on an outer peripheral surface of an outer ring of a rolling bearing. The number is set to a number that avoids the integral multiple of the number of rolling elements and the integral multiple ± 1.
【０００９】[0009]
【発明の実施の形態】図１はこの発明の一実施形態であ
る。内側円筒部２と、内側円筒部２から径方向に離間さ
れかつ円板部４で結合されたベルト案内用の外側円筒部
３、および円板部４の円周側面上で放射状に形成された
複数のリブ５とで合成樹脂本体部１が一体成形されてい
る。この合成樹脂としては、ガラス繊維等の強化繊維を
含有したナイロン６６やＰＰＳ等が使用される。また内
輪９と、外輪７と、内外輪９，７間に介装された転動体
である玉８とを有する転がり軸受６の外輪７外周面に、
射出成形にて上記合成樹脂本体部１が一体成形されてい
る。なお、上記合成樹脂本体部の外側円筒部３の外周面
は図示しないベルトを案内する。FIG. 1 shows an embodiment of the present invention. The inner cylindrical portion 2, the outer cylindrical portion 3 for guiding the belt, which is radially separated from the inner cylindrical portion 2 and joined by the disk portion 4, and are formed radially on the circumferential side surface of the disk portion 4. The synthetic resin main body 1 is integrally formed with the plurality of ribs 5. As the synthetic resin, nylon 66 or PPS containing reinforcing fibers such as glass fibers is used. In addition, on the outer peripheral surface of the outer ring 7 of the rolling bearing 6 having the inner ring 9, the outer ring 7, and the ball 8 which is a rolling element interposed between the inner and outer rings 9, 7,
The synthetic resin body 1 is integrally formed by injection molding. The outer peripheral surface of the outer cylindrical portion 3 of the synthetic resin body guides a belt (not shown).
【００１０】さらに、うねりの山数と一致する上記リブ
５の数（Ｒｎ）は、玉８の数（ｚ）の整数（ｎ）倍、及
び整数（ｎ）倍の±１を回避するように形成されてい
る。例えば、図２ではＲｎ＝ｎｚ＋２とされている。な
お、図示しないが、さらにＲｎ＝ｎｚ±２、Ｒｎ＝ｎｚ
±３等、Ｒｎ＝ｎｚ及びＲｎ＝ｎｚ±１を回避する範囲
で適宜設定される。Further, the number (Rn) of the ribs 5 corresponding to the number of undulations is set so as to avoid the integer (n) times the number (z) of the balls 8 and ± 1 of the integer (n) times. Is formed. For example, in FIG. 2, Rn = nz + 2. Although not shown, Rn = nz ± 2 and Rn = nz
± 3 or the like is appropriately set within a range that avoids Rn = nz and Rn = nz ± 1.
【００１１】上記実施形態では、うねりの山数と一致す
るリブ数を上記範囲に設定したため、転がり軸受の回転
中の振動や音が発生せず、合成樹脂製プーリとしての強
度や剛性を維持しながら、精度を向上させることができ
る。In the above embodiment, since the number of ribs corresponding to the number of undulations is set in the above range, no vibration or noise is generated during the rotation of the rolling bearing, and the strength and rigidity of the synthetic resin pulley are maintained. However, accuracy can be improved.
【００１２】[0012]
【発明の効果】この発明では、合成樹脂製プーリの合成
樹脂本体部に形成したリブ数が、軸受の転動体数の整数
倍、及び整数倍±１を回避する数に設定されているた
め、強度や剛性を維持しかつうねりの抑えにより振動や
音の発生が防止される。According to the present invention, the number of ribs formed on the synthetic resin body of the synthetic resin pulley is set to a number that avoids an integral multiple of the number of rolling elements of the bearing and an integral multiple ± 1. Vibration and noise are prevented by maintaining strength and rigidity and suppressing undulation.
【図１】本発明の一実施形態の合成樹脂製プーリの断面
図である。FIG. 1 is a sectional view of a synthetic resin pulley according to an embodiment of the present invention.
【図２】本発明の一実施形態の合成樹脂製プーリの側面
模式図である。FIG. 2 is a schematic side view of a synthetic resin pulley according to one embodiment of the present invention.
【図３】本発明の別の実施形態の合成樹脂製プーリの側
面模式図である。FIG. 3 is a schematic side view of a synthetic resin pulley according to another embodiment of the present invention.
【図４】玉軸受外輪の軸方向振動の発生機構の説明図で
ある。FIG. 4 is an explanatory diagram of a mechanism for generating axial vibration of a ball bearing outer ring.
１ 合成樹脂本体部 ２ 内側円筒部 ３ 外側円筒部 ４ 円板部 ５ リブ ６ 転がり軸受 ７ 外輪 ８ 玉 ９ 内輪 DESCRIPTION OF SYMBOLS 1 Synthetic resin main body part 2 Inner cylindrical part 3 Outer cylindrical part 4 Disk part 5 Rib 6 Rolling bearing 7 Outer ring 8 Ball 9 Inner ring
Claims (1)
離隔されかつ円板部で結合されたベルト案内用の外側円
筒部、および円板部の円周側面上で放射状に形成された
複数のリブとを有する合成樹脂本体部が、転がり軸受の
外輪外周面に一体成形された合成樹脂製プーリにおい
て、上記リブ数が、軸受の転動体数の整数倍、及び整数
倍±１を回避する数に設定されていることを特徴とする
合成樹脂製プーリ。1. An inner cylindrical portion, an outer cylindrical portion for guiding a belt radially separated from the inner cylindrical portion and joined by a disk portion, and formed radially on a circumferential side surface of the disk portion. In a synthetic resin pulley in which a synthetic resin main body having a plurality of ribs is integrally formed on the outer peripheral surface of the outer ring of a rolling bearing, the number of ribs is set to be an integral multiple of the number of rolling elements of the bearing and an integral multiple of ± 1. A pulley made of synthetic resin, characterized in that the number of pulleys is set to the number of pulleys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37658799A JP2001165281A (en) | 1999-12-13 | 1999-12-13 | Synthetic resin pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37658799A JP2001165281A (en) | 1999-12-13 | 1999-12-13 | Synthetic resin pulley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001165281A true JP2001165281A (en) | 2001-06-19 |
Family
ID=18507397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP37658799A Pending JP2001165281A (en) | 1999-12-13 | 1999-12-13 | Synthetic resin pulley |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001165281A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014040844A (en) * | 2012-08-21 | 2014-03-06 | Jtekt Corp | Rolling bearing |
-
1999
- 1999-12-13 JP JP37658799A patent/JP2001165281A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014040844A (en) * | 2012-08-21 | 2014-03-06 | Jtekt Corp | Rolling bearing |
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