JPH0366540B2 - - Google Patents
Info
- Publication number
- JPH0366540B2 JPH0366540B2 JP58059495A JP5949583A JPH0366540B2 JP H0366540 B2 JPH0366540 B2 JP H0366540B2 JP 58059495 A JP58059495 A JP 58059495A JP 5949583 A JP5949583 A JP 5949583A JP H0366540 B2 JPH0366540 B2 JP H0366540B2
- Authority
- JP
- Japan
- Prior art keywords
- belt
- pulley
- pitch
- ribbed belt
- concave
- 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.)
- Expired - Lifetime
Links
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
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/36—Pulleys
- F16H55/49—Features essential to V-belts pulleys
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pulleys (AREA)
Description
【発明の詳細な説明】
この発明は巻掛伝動装置のＶリブドベルト用プ
ーリに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pulley for a V-ribbed belt of a wrap-around transmission.
第１図は従来から使用されている巻掛伝動装置
の側面図である。この図において、１は駆動プー
リ、２は被駆動プーリ、３は両プーリ１，２間に
架設されたＶリブドベルト、４はベルト走行方向
である。 FIG. 1 is a side view of a conventionally used wrap-around transmission. In this figure, 1 is a driving pulley, 2 is a driven pulley, 3 is a V-ribbed belt installed between both pulleys 1 and 2, and 4 is the belt running direction.
第２図は第１図の−線拡大断面図である。
この図に示すように、Ｖリブドベルト３はその内
周部に、第１図のベルト走行方向４に平行な複数
の凸条５を有し、かつプーリ１の外周部には、上
記各凸条５と係合する複数の凹周溝６が形成され
ている。 FIG. 2 is an enlarged sectional view taken along the - line in FIG. 1.
As shown in this figure, the V-ribbed belt 3 has a plurality of protrusions 5 on its inner periphery, which are parallel to the belt running direction 4 in FIG. A plurality of concave circumferential grooves 6 that engage with the grooves 5 are formed.
このような巻掛伝動装置は、たとえば実開昭57
−100657号公報にも開示されるように公知であ
る。 Such a wrap-around transmission device was developed, for example, in the 1980s.
It is publicly known as disclosed in Japanese Patent No.-100657.
ところで、上記巻掛伝動装置においては、ベル
ト３の縦方向（走行方向）の伸び剛性は、動力の
伝達に際し、ベルト中央部で大きく、側端部で小
さくなる。このため、ベルト３は、緊張状態にお
いて、幅方向中央部の伸び量が小さく、側端部の
伸び量が大きくなり、この伸び変形に伴つて、ベ
ルト３の幅方向の収縮量は、中央部で小、側端部
で大となる。この結果、第３図に示すように、ベ
ルト３の中央部の面圧に比較して、側端部近傍の
面圧が減少し、ベルト中央部に荷重が集中する。
その結果、ベルト３とプーリ１間でスリツプが起
こり、動力伝達性能の低下やスリツプ騒音の発生
を招来する欠点があつた。 By the way, in the above-mentioned wrap-around transmission device, the elongation rigidity of the belt 3 in the longitudinal direction (travel direction) is large at the center portion of the belt and small at the side ends during power transmission. Therefore, when the belt 3 is under tension, the amount of elongation at the center in the width direction is small, and the amount of elongation at the side edges is large. It is small at the edge and large at the side edge. As a result, as shown in FIG. 3, the surface pressure near the side edges of the belt 3 decreases compared to the surface pressure at the center, and the load concentrates on the belt center.
As a result, slipping occurs between the belt 3 and the pulley 1, resulting in a reduction in power transmission performance and generation of slipping noise.
この発明は上記欠点を解消するためになされた
ものでＶリブドベルト用プーリの凹周溝のピツチ
を、Ｖリブドベルトの非緊張状態で上記凹周溝に
係合する上記ベルトの凸条のピツチよりも小さく
なるように設定すると共に、Ｖリブドベルトの外
周面を幅方向側端部から中央部に向けて徐々に径
寸法を小さくした横断面凹形状とすることによ
り、動力の伝達に際して、ベルトとプーリ間の面
圧をベルト幅方向において均等化し、ベルトとプ
ーリ間でのスリツプの発生を防止することを目的
としている。 This invention was made to solve the above-mentioned drawbacks, and the pitch of the concave circumferential grooves of the pulley for a V-ribbed belt is set to be higher than the pitch of the convex stripes of the belt that engages with the concave circumferential groove when the V-ribbed belt is in a non-tensioned state. By setting the outer circumferential surface of the V-ribbed belt to have a concave cross-sectional shape with the diameter gradually decreasing from the widthwise end toward the center, the distance between the belt and the pulley is reduced during power transmission. The purpose is to equalize the surface pressure in the belt width direction and prevent slips between the belt and the pulleys.
以下、この発明の実施例を図面にもとづいて説
明する。 Embodiments of the present invention will be described below based on the drawings.
第４図はこの発明の一実施例を示す。この図で
は、Ｖリブドベルト１０はプーリ１１に対して非
緊張状態にある。上記ベルト１０はその内周部
に、ベルト走行方向（第４図中、紙面表裏方向）
に複数のほぼ同一高さの凸条１２を有し、かつプ
ーリ１１の外周部には、ベルト１０の各凸条１２
が係合する複数の凹周溝１３が形成されている。 FIG. 4 shows an embodiment of the invention. In this figure, the V-ribbed belt 10 is in a non-tensioned state with respect to the pulley 11. The belt 10 has an inner periphery in the belt running direction (in FIG. 4, the front and back directions of the paper).
has a plurality of protrusions 12 of approximately the same height, and each protrusion 12 of the belt 10 is provided on the outer periphery of the pulley 11.
A plurality of concave circumferential grooves 13 are formed to engage with each other.
上記ベルト１０の内周部は平面状に形成されて
いるが、プーリ１１の外周部は各凹周溝１３，１
３間の凸条１４の頂部が曲線１５に沿うように、
凹状に形成されている。その結果、第４図で示す
ベルト１０の非緊張状態では、このベルト１０
は、その両側端部でプーリ１１の両側端部１６，
１６に係合支持され、ベルト１０の内周部とプー
リ１１の外周部との間の隙間１７はプーリ軸方向
の中央部で大きく、両側端部で小さく保持されて
いる。また、プーリ１１の凹周溝１３は、その中
心線１８が上記曲線１５を円弧とする円の中心を
指向して収束する状態に形成されている。 The inner peripheral part of the belt 10 is formed into a flat shape, but the outer peripheral part of the pulley 11 is formed in each concave peripheral groove 13, 1.
so that the top of the protruding line 14 between 3 lines along the curve 15,
It is formed in a concave shape. As a result, in the untensioned state of the belt 10 shown in FIG.
are the opposite ends 16 of the pulley 11 at both ends thereof,
The gap 17 between the inner circumference of the belt 10 and the outer circumference of the pulley 11 is large at the center in the axial direction of the pulley and small at both ends. Further, the concave circumferential groove 13 of the pulley 11 is formed so that its center line 18 points toward the center of a circle having the curve 15 as an arc and converges.
第５図に示すように、プーリ１１の凹周溝１３
のピツチｌ（l1，l2）は、ベルト１０の非緊張状態
で、ベルト１０の凸条１２のピツチＬよりも小さ
くなるように設定されている。また、側端側の凹
周溝１３のピツチl2は内側の凹周溝１３のピツチ
l1よりも小さく設定されている。なお、上記凸条
１２のピツチＬは一定である。 As shown in FIG. 5, the concave circumferential groove 13 of the pulley 11
The pitch l (l 1 , l 2 ) is set to be smaller than the pitch L of the ridges 12 of the belt 10 when the belt 10 is in a non-tensioned state. Also, the pitch l 2 of the concave circumferential groove 13 on the side end side is the same as the pitch l 2 of the concave circumferential groove 13 on the inner side.
l is set smaller than 1 . Note that the pitch L of the protrusions 12 is constant.
第４図の状態において、ベルト１０が張力が加
わると、このベルト１０は曲線１５にそつて第６
図のように弓状に変形する。この点について詳し
く説明すると、ベルト１０に張力が加わつたとき
に、ベルト１０の内部に発生する力は、ベルト１
０の側端部では幅方向中央部に向けて指向するこ
とになる。また、上述したように、ベルト１０に
張力が加わつたときにはベルト１０の側端部が中
央部よりも伸び変形量が大きいため、ベルト１０
は弓状に変形する。これにより、ベルト１０の各
凸条１２がプーリ１１の所定の凹周溝１３に完全
に密着係合し、ベルト１０の緊張状態が形成され
る。 When tension is applied to the belt 10 in the state shown in FIG.
It deforms into an arched shape as shown in the figure. To explain this point in detail, when tension is applied to the belt 10, the force generated inside the belt 10 is
The side end portion of 0 is oriented toward the center in the width direction. Furthermore, as described above, when tension is applied to the belt 10, the side edges of the belt 10 stretch and deform more than the center, so the belt 10
is deformed into a bow shape. As a result, each of the protrusions 12 of the belt 10 is completely tightly engaged with a predetermined groove 13 of the pulley 11, and the belt 10 is placed in a tensioned state.
ところで、上記実施例の場合も、動力の伝達に
際し、ベルト１０の縦方向の伸び剛性はベルト中
央部で大きく側端部で小さいので、ベルト１０の
幅方向の収縮量は中央部よりも側端部で大とな
る。これに対し、第５図のように、プーリ１１の
凹周溝１３のピツチｌ（l1，l2）は、ベルト１０の
非緊張状態でベルト１０の凸条１２のピツチＬよ
りも小さくなるように設定されているため、ベル
ト１０が上記のように幅方向に収縮しても、プー
リ１１の各凸条１４の外面部１９には過大な面圧
は作用せず、従来、ベルト１０の上記幅方向の収
縮により該ベルト１０の側端部にかかつていた過
大な力がベルト１０の中央部近傍に分散され、ベ
ルト１０とプーリ１１間の面圧がベルト幅方向に
おいて均等化される。したがつて、動力の伝達に
際し、ベルト１０とプーリ１１間でスリツプを生
じることはない。 By the way, in the case of the above embodiment as well, when transmitting power, the longitudinal elongation rigidity of the belt 10 is large at the center of the belt and small at the side edges, so the amount of contraction in the width direction of the belt 10 is smaller at the side edges than at the center. It becomes big in the department. On the other hand, as shown in FIG. 5, the pitch l (l 1 , l 2 ) of the concave circumferential groove 13 of the pulley 11 is smaller than the pitch L of the convex strip 12 of the belt 10 when the belt 10 is in a non-tensioned state. Therefore, even if the belt 10 contracts in the width direction as described above, no excessive surface pressure is applied to the outer surface 19 of each protrusion 14 of the pulley 11. Due to the contraction in the width direction, the excessive force exerted on the side ends of the belt 10 is dispersed near the center of the belt 10, and the surface pressure between the belt 10 and the pulley 11 is equalized in the belt width direction. Therefore, no slip occurs between the belt 10 and the pulley 11 during power transmission.
なお、上述したベルト１０の幅方向の収縮量
は、中央部から側端部に向かつて次第に大きくな
るので、第５図のように、側端側の凹周溝１３の
ピツチl2を内側の凹周溝１３のピツチl1よりも小
さくすると、ベルト１０とプーリ１１間のベルト
幅方向の面圧をさらに均等化することができる。 Note that the amount of contraction in the width direction of the belt 10 described above gradually increases from the center to the side edges, so as shown in FIG. When the pitch of the concave circumferential groove 13 is smaller than l1 , the surface pressure between the belt 10 and the pulley 11 in the belt width direction can be further equalized.
また、一般に、平板状のベルト１０は張力を受
けると弓形に変形しようとするので、第４図のよ
うに、プーリ１１を曲線１５に沿う凹状、すなわ
ち弓形に形成しておけば、第６図の緊張状態にお
いて、ベルト１０の凸条１２の外面部２０をプー
リ１１の凹周溝１３に上記ベルト１０の幅方向に
おいて均等な力で圧接させることができる。しか
もプーリ１１の各凹周溝１３を、その中心線１８
が上記曲線１５を円弧とする円の中心を指向して
収束するように設定することにより、各凸条１２
をそれぞれの凹周溝１３に適正に密着させること
ができる。 Generally, the flat belt 10 tends to deform into a bow shape when subjected to tension, so if the pulley 11 is formed into a concave shape along the curve 15, that is, a bow shape, as shown in FIG. In the tensioned state, the outer surface portion 20 of the convex strip 12 of the belt 10 can be pressed against the concave circumferential groove 13 of the pulley 11 with uniform force in the width direction of the belt 10. Moreover, each concave circumferential groove 13 of the pulley 11 is
By setting the curve 15 to converge toward the center of a circle whose arc is the curve 15, each protrusion 12
can be properly brought into close contact with each concave circumferential groove 13.
したがつて、このような構成を採用することに
よつても、ベルト１０とプーリ１１間のベルト幅
方向の面圧をより一層均等化させることができ
る。 Therefore, even by employing such a configuration, the surface pressure in the belt width direction between the belt 10 and the pulley 11 can be made even more equal.
以上説明したように、この発明によれば、Ｖリ
ブドベルト用プーリの凹周溝のピツチを、Ｖリブ
ドベルトの非緊張状態で上記凹周溝に係合する上
記ベルトの凸条のピツチよりも小さくなるように
設定し、更にＶリブドベルトの外周面を幅方向側
端部から中央部に向けて徐々に径寸法をさくした
横断面凹形状としたので、動力の伝達に際して、
ベルトとプーリ間の面圧をベルト幅方向において
均等化し、ベルトとプーリ間でのスリツプの発生
を防止できる効果が得られる。そして、上記Ｖリ
ブドベルト用プーリの横断面形状は、緊張状態に
あるＶリブドベルトの形状変形に沿つたものであ
るため、Ｖリブドベルトに無理な力を及ぼすこと
がなく、従つて、Ｖリブドベルトに無理を強いる
ことなく上記スリツプ発生防止を図ることができ
る。 As explained above, according to the present invention, the pitch of the concave circumferential groove of the V-ribbed belt pulley is made smaller than the pitch of the convex stripes of the belt that engages with the concave circumferential groove when the V-ribbed belt is in a non-tensioned state. Furthermore, since the outer peripheral surface of the V-ribbed belt has a concave cross-sectional shape with a diameter gradually decreasing from the widthwise end to the center, when transmitting power,
The effect of equalizing the surface pressure between the belt and the pulley in the belt width direction and preventing the occurrence of slip between the belt and the pulley is achieved. The cross-sectional shape of the pulley for the V-ribbed belt is in line with the deformation of the V-ribbed belt in the tensioned state, so that it does not apply unreasonable force to the V-ribbed belt. The occurrence of slips can be prevented without forcing.
第１図は従来の巻掛伝動装置の側面図、第２図
は第１図の−線拡大断面図、第３図は従来の
プーリとベルト間の面圧特性図、第４図はこの発
明の一実施例にかかるプーリとベルトとの半係合
状態を示す一部切欠正面図、第５図はプーリの凹
周溝とベルトの凸条間のピツチ説明図、第６図は
第４図のプーリとベルトとの完全係合状態を示す
一部切欠正面図である。
１０…Ｖリブドベルト、１１…プーリ、１２…
凸条、１３…凹周溝、ｌ，Ｌ…ピツチ。
Fig. 1 is a side view of a conventional wrap-around transmission, Fig. 2 is an enlarged sectional view taken along the - line in Fig. 1, Fig. 3 is a conventional surface pressure characteristic diagram between the pulley and belt, and Fig. 4 is the invention. A partially cutaway front view showing a semi-engaged state between a pulley and a belt according to an embodiment, FIG. 5 is an explanatory diagram of the pitch between the concave circumferential groove of the pulley and the convex strip of the belt, and FIG. 6 is a diagram of FIG. FIG. 3 is a partially cutaway front view showing a complete engagement state between the pulley and the belt. 10...V-ribbed belt, 11...pulley, 12...
Convex strip, 13...concave circumferential groove, l, L...pitch.
Claims (1)
るＶリブドベルトの上記凸条と係合する複数の凹
周溝を外周面に形成したＶリブドベルト用プーリ
において、 上記凹周溝のピツチを、上記Ｖリブドベルトの
非緊張状態で上記凸条のピツチよりも小さくなる
ように設定し、 前記Ｖリブドベルト用プーリの前記外周面を、
幅方向側端部から中央部に向けて徐々に径寸法を
小さくした横断面凹形状とした、 ことを特徴とするＶリブドベルト用プーリ。 ２ 幅方向側端部側の凹周溝のピツチを中央部側
の凹周溝のピツチよりも小さく設定した特許請求
の範囲第１項記載のＶリブドベルト用プーリ。[Scope of Claims] 1. A pulley for a V-ribbed belt in which a plurality of concave circumferential grooves are formed on the outer circumferential surface to engage with the convex lines of a V-ribbed belt having a plurality of convex lines parallel to the running direction on the inner circumference, the above-mentioned The pitch of the concave circumferential groove is set to be smaller than the pitch of the convex groove when the V-ribbed belt is in an untensioned state, and the outer circumferential surface of the V-ribbed belt pulley is
A pulley for a V-ribbed belt, characterized in that the cross section has a concave shape with a diameter gradually decreasing from the side ends in the width direction toward the center. 2. A pulley for a V-ribbed belt as set forth in claim 1, wherein the pitch of the concave circumferential grooves on the widthwise end side is set smaller than the pitch of the concave circumferential groove on the center side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5949583A JPS59187169A (en) | 1983-04-04 | 1983-04-04 | Pulley for v-ribbed belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5949583A JPS59187169A (en) | 1983-04-04 | 1983-04-04 | Pulley for v-ribbed belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59187169A JPS59187169A (en) | 1984-10-24 |
| JPH0366540B2 true JPH0366540B2 (en) | 1991-10-17 |
Family
ID=13114918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5949583A Granted JPS59187169A (en) | 1983-04-04 | 1983-04-04 | Pulley for v-ribbed belt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59187169A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017107342A1 (en) * | 2017-04-05 | 2018-10-11 | Nemos Gmbh | Arrangement of a belt with belt tracking profile on a deflection roller with roller tracking profile and pulley and belt, in particular for such an arrangement |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5319655U (en) * | 1976-07-29 | 1978-02-20 | ||
| JPS5844562U (en) * | 1981-09-11 | 1983-03-25 | トヨタ自動車株式会社 | Power transmission pulley |
-
1983
- 1983-04-04 JP JP5949583A patent/JPS59187169A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59187169A (en) | 1984-10-24 |
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