JP2000161472A - Resin pulley - Google Patents

Resin pulley

Info

Publication number
JP2000161472A
JP2000161472A JP10340216A JP34021698A JP2000161472A JP 2000161472 A JP2000161472 A JP 2000161472A JP 10340216 A JP10340216 A JP 10340216A JP 34021698 A JP34021698 A JP 34021698A JP 2000161472 A JP2000161472 A JP 2000161472A
Authority
JP
Japan
Prior art keywords
outer peripheral
peripheral surface
boss
web
resin
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
JP10340216A
Other languages
Japanese (ja)
Inventor
Shinichi Tawara
伸一 田原
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.)
Resonac Corp
Original Assignee
Shin Kobe Electric Machinery 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 Shin Kobe Electric Machinery Co Ltd filed Critical Shin Kobe Electric Machinery Co Ltd
Priority to JP10340216A priority Critical patent/JP2000161472A/en
Publication of JP2000161472A publication Critical patent/JP2000161472A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To improve cylindrical degree of a resin pulley in which a boss is dislocated from an axial center of an outer peripheral surface to one side by reducing non-circle degree and inclination degree. SOLUTION: A web 3 connecting a boss 1 to an outer peripheral surface 2 for laying a belt is so formed of a bent or curved surface that the boss 1 is formed on a position dislocated from an axial center position of the outer peripheral surface 2 to one side. The boss 1 is stood from the periphery of the web 3 so as to form dish- or bowl-like shape. Namely, the web 3 is integrated with an inner side surface of the axial center portion of the outer peripheral surface 2, while the peripheral portion of the web 3 is tapered in an axial direction of the outer peripheral surface 2. The outer peripheral surface 2 and the web 3 compose a circular groove 6 on an outer side of the dish- or bowl-like form at its integrated portion therebetween. Ribs 7 are formed so as to block the circular groove 6 with specified intervals in its all circumference.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、動力伝達に用いる
樹脂製プーリに関する。殊に、射出成形により製造され
た樹脂製プーリに関する。
The present invention relates to a resin pulley used for power transmission. In particular, it relates to a resin pulley manufactured by injection molding.

【0002】[0002]

【従来の技術】図4は、一般的な樹脂製プーリ(歯付プ
ーリ)を示したものである。(a)は正面断面図、(b)
は左側面図、(c)は右側面図である。回転軸への取付
け箇所を備えたボス1と、ベルトを掛ける外周面2(歯
付ベルトと噛み合う歯を設けてある)と、外周面2の内
側でボス1と外周面2の間をつなぐウェブ3で構成され
ている。この樹脂製プーリは、金型内でボスに対応する
箇所から樹脂を射出して成形される。通常、回転軸への
取付け箇所はボス1と一体になった金属製ブッシュ4で
あり、金属製ブッシュ4は成形時にインサート物として
金型内に配置する。また、外周面2には、ベルト脱落防
止のために、軸方向の一方の端に鍔5を設けるのが一般
的である。
2. Description of the Related Art FIG. 4 shows a general resin pulley (toothed pulley). (A) is a front sectional view, (b)
Is a left side view, and (c) is a right side view. A boss 1 provided with a portion to be attached to a rotating shaft, an outer peripheral surface 2 on which a belt is hung (provided with teeth that mesh with the toothed belt), and a web connecting the boss 1 and the outer peripheral surface 2 inside the outer peripheral surface 2 3. The resin pulley is formed by injecting resin from a portion corresponding to a boss in a mold. Normally, the portion to be attached to the rotating shaft is a metal bush 4 integrated with the boss 1, and the metal bush 4 is arranged in a mold as an insert during molding. Generally, a flange 5 is provided on the outer peripheral surface 2 at one end in the axial direction to prevent the belt from falling off.

【0003】樹脂製プーリの仕様を検討する際、外周面
2の剛性と円筒度を確保することを考慮すると、図4に
示すように、ボス1とウェブ3とはほぼ同じ平面上に位
置し、かつ、ウェブ3は外周面2の軸方向中央部に一体
化されるように設計するのが理想的である。ここで、円
筒度とは二つの要素からなり、外周面2を形成している
円筒が外周面の軸方向全体にわたって真円から外れてい
ないかどうかということ(非円度)と、外周面2が回転
軸に対して平行にならず倒れていないかどうかというこ
と(倒れ度)である。
[0003] When considering the specifications of the resin pulley, in consideration of securing the rigidity and cylindricity of the outer peripheral surface 2, the boss 1 and the web 3 are located on substantially the same plane as shown in FIG. 4. Ideally, the web 3 is designed to be integrated with the axially central portion of the outer peripheral surface 2. Here, the cylindricity is composed of two elements. Whether the cylinder forming the outer peripheral surface 2 does not deviate from a perfect circle over the entire axial direction of the outer peripheral surface (non-circularity), Is not parallel to the rotation axis and does not fall (the degree of falling).

【0004】ところで、プーリ取付け周りの構造物の配
置等、レイアウト上の事情から、ボスが外周面軸方向中
央部から一方の側へ片寄った位置に配置されることがあ
る。図5は、このような樹脂製プーリ(歯付プーリ)を
示している。ボス1が、ベルトを掛ける外周面2の軸方
向中央部から一方の側へ片寄った位置に配置されるよう
に、ボス1と外周面2の間をつなぐウェブ3を屈曲した
面ないしは曲面で構成し、ボス1が底部でウェブ3の周
囲が立ち上がった皿形ないしは椀形の形状にしている。
すなわち、ウェブ3は外周面2の軸方向中央部内側面と
一体になっており、ウェブ3の周辺部分が外周面2の軸
方向に対して傾斜している。また、前記皿形ないしは椀
形の外側において外周面2とウェブ3とが、両者の一体
化部分に円還状の溝6を構成している。溝6は、この部
分の肉厚を薄くして、成形時の樹脂の収縮を抑制するた
めのものである。外周面2の一方の端に設けられた鍔5
は、ボス1から遠い方の端に位置している。
[0004] By the way, the boss may be arranged at a position deviated from the center in the axial direction of the outer peripheral surface to one side due to the layout situation such as the arrangement of the structure around the pulley mounting. FIG. 5 shows such a resin pulley (toothed pulley). The web 3 connecting the boss 1 and the outer peripheral surface 2 is formed by a curved surface or a curved surface so that the boss 1 is disposed at a position deviated to one side from the axial center of the outer peripheral surface 2 on which the belt is hung. The boss 1 has a dish-shaped or bowl-shaped shape in which the periphery of the web 3 rises at the bottom.
That is, the web 3 is integrated with the inner surface of the central portion of the outer peripheral surface 2 in the axial direction, and the peripheral portion of the web 3 is inclined with respect to the axial direction of the outer peripheral surface 2. The outer peripheral surface 2 and the web 3 on the outside of the dish shape or the bowl shape constitute a circular groove 6 at an integrated portion of the two. The groove 6 is for reducing the thickness of this portion to suppress shrinkage of the resin during molding. A collar 5 provided at one end of the outer peripheral surface 2
Is located at the far end from the boss 1.

【0005】[0005]

【発明が解決しようとする課題】図5に示したような樹
脂製プーリ、すなわち、主要部が、回転軸への取付け箇
所を備えたボスと、ベルトを掛ける外周面と、ボスが外
周面軸方向中央部から一方の側へ片寄って位置するよう
にボスと外周面の間をつなぐウェブとで構成され、金型
内でボスに対応する箇所から樹脂を射出して成形された
樹脂製プーリは、外周面の円筒度が良くない。円筒度を
評価する非円度と倒れ度の2要素のうち、特に倒れ度が
大きい。外周面が、ボスが片寄っている側に倒れ込む、
すなわち、ボスが片寄っている側の外周面の断面径がボ
スから遠い側の外周面の断面径より小さくなるのであ
る。本発明が解決しようとする課題は、ボスが外周面軸
方向中央部から一方の側へ片寄って配置された上記のよ
うな樹脂製プーリにおいて、非円度と倒れ度を小さくし
て円筒度を改善することである。
A pulley made of resin as shown in FIG. 5, that is, a boss having a main portion provided with a portion to be attached to a rotary shaft, an outer peripheral surface on which a belt is hung, and a boss having an outer peripheral shaft The resin pulley formed by injecting the resin from the portion corresponding to the boss in the mold and being formed by a web connecting the boss and the outer peripheral surface so as to be offset to one side from the center in the direction. The cylindricity of the outer peripheral surface is not good. Among the two factors of non-circularity and the degree of tilt for evaluating cylindricity, the degree of tilt is particularly large. The outer peripheral surface falls down to the side where the boss is biased,
That is, the cross-sectional diameter of the outer peripheral surface on the side where the boss is offset is smaller than the cross-sectional diameter of the outer peripheral surface on the side far from the boss. The problem to be solved by the present invention is to reduce the non-circularity and the degree of fall in the resin pulley as described above in which the boss is offset from the center part in the axial direction of the outer peripheral surface to one side, thereby reducing the cylindricity. It is to improve.

【0006】[0006]

【課題を解決するための手段】図5において説明した樹
脂製プーリの円筒度の低下を検討したところ、倒れ度
は、射出成形時に外周面にかかる圧力が関係しており、
ウェブが外周面軸方向に対して傾斜していることから、
外周面軸方向の一方に片寄っているボスから遠い側の外
周面により大きな圧力がかかり、これがボスから遠い側
の外周面を大径にする原因であることが判明した。ま
た、非円度は、金型キャビティに射出された樹脂の拡が
り方のばらつきと射出圧力が外周面に均一にかからない
ことが原因であると判明した。
When the reduction in cylindricity of the resin pulley described with reference to FIG. 5 was examined, the degree of fall was related to the pressure applied to the outer peripheral surface during injection molding.
Since the web is inclined with respect to the axial direction of the outer peripheral surface,
It has been found that a larger pressure is applied to the outer peripheral surface farther from the boss that is biased to one side in the axial direction of the outer peripheral surface, which is a cause of increasing the diameter of the outer peripheral surface farther from the boss. In addition, it has been found that the non-circularity is caused by a variation in the spread of the resin injected into the mold cavity and an injection pressure not uniformly applied to the outer peripheral surface.

【0007】このような観点から、本発明にかかる樹脂
製プーリは、図5において説明した円還状の溝6をその
全周にわたって所定間隔で埋めるリブを形成したことを
特徴とする。図1〜3には、円還状の溝6を埋めるリブ
7,7’を示した。前記リブの存在により、外周面軸方
向の一方に片寄っているボス側の外周面近傍の樹脂量が
増えることになり、外周面にかかる射出圧力が均一にな
って、倒れ度・非円度とも小さくなって円筒度が向上す
る。リブを形成すると、その部分の肉厚が厚くなって樹
脂の収縮による円筒度低下が懸念される。図3に示すよ
うに、リブ7を形成した位置に対応する反対側ウェブ傾
斜面の樹脂を除いて樹脂盗み部8を形成することによ
り、樹脂の収縮の影響が排除され、さらに円筒度が向上
する。
[0007] From such a viewpoint, the resin pulley according to the present invention is characterized in that ribs are formed at predetermined intervals over the entire circumference of the groove 6 described in FIG. FIGS. 1 to 3 show ribs 7 and 7 ′ for filling the groove 6 in a circular shape. Due to the presence of the ribs, the amount of resin near the outer peripheral surface on the boss side which is offset to one side in the axial direction of the outer peripheral surface increases, and the injection pressure applied to the outer peripheral surface becomes uniform, and both the degree of fall and the degree of non-circularity are increased. It becomes smaller and cylindricity improves. When the rib is formed, the thickness of the portion is increased, and there is a concern that the cylindricity may decrease due to shrinkage of the resin. As shown in FIG. 3, by forming the resin stealing portion 8 except for the resin on the opposite web inclined surface corresponding to the position where the rib 7 is formed, the influence of resin shrinkage is eliminated, and the cylindricity is further improved. I do.

【0008】[0008]

【発明実施の形態】本発明の実施の形態を従来例と共に
説明する。これらは、タイミングベルトを使用した自動
車エンジンの吸排気バルブ駆動用の樹脂製歯付きプーリ
であり、ボスに相当する位置からガラス繊維入りフェノ
ール樹脂を射出して成形される。成形材料は、前記の材
料に限らず、射出成形可能な樹脂材料であればすべてに
適用可能である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described together with a conventional example. These are resin-made toothed pulleys for driving intake and exhaust valves of an automobile engine using a timing belt, and are formed by injecting a phenol resin containing glass fiber from a position corresponding to a boss. The molding material is not limited to the above-mentioned materials, but can be applied to any resin material that can be injection-molded.

【0009】従来例1 外径132mm、厚み(外周面の軸方向長さ)31mmであ
り、外周面にタイミングベルトと噛み合う44個の歯を
形成した歯付きプーリである。既に図5において説明し
たように、ボス1が外周面2の軸方向中央部から一方の
側へ片寄って配置される。ボス1と外周面2の間をつな
ぐウェブ3を屈曲した面で構成し、ボス1を底部となし
ウェブ3の周囲が立ち上がった皿形の形状とする。ウェ
ブ3は外周面2の軸方向中央部内側面と一体になってお
り、ウェブ3の周辺部分が外周面2の軸方向に対して傾
斜している。前記皿形の外側において、外周面2とウェ
ブ3とが、両者の一体化部分に円還状の溝6を構成して
いる。鍔5は、外周面2の一方の端(ボス1から遠い方
の端)に設けられている。ボス1には外径45mm、厚み
5mmの金属製のブッシュ4がインサート成形されてお
り、ブッシュ4の周囲は樹脂で包みこまれている。成形
金型には、ボス1に相当する箇所にゲートを配置してあ
り、ここから金型キャビティ内に樹脂を射出する。射出
された樹脂はボス1からウェブ3に相当する金型キャビ
ティ内を通り、外周面2に相当する金型キャビティに充
填される。充填後、ゲート部の樹脂が硬化するまで射出
圧力をかけ続け、硬化した後に圧力を解除する。そし
て、プーリ全体が十分硬化したら金型を開き、取り出し
て常温程度まで自然冷却した後、ゲート部の除去加工等
を行なう。
Conventional Example 1 A toothed pulley having an outer diameter of 132 mm and a thickness (axial length of the outer peripheral surface) of 31 mm, and having 44 teeth formed on the outer peripheral surface to mesh with the timing belt. As already described with reference to FIG. 5, the boss 1 is arranged to be offset from the axial center of the outer peripheral surface 2 to one side. The web 3 connecting between the boss 1 and the outer peripheral surface 2 is formed of a bent surface, and the boss 1 is formed in a dish-like shape in which the bottom is formed and the periphery of the web 3 stands up. The web 3 is integrated with the inner surface of the central portion of the outer peripheral surface 2 in the axial direction, and the peripheral portion of the web 3 is inclined with respect to the axial direction of the outer peripheral surface 2. On the outer side of the dish shape, the outer peripheral surface 2 and the web 3 form a circular groove 6 at an integrated portion of the both. The flange 5 is provided at one end of the outer peripheral surface 2 (the end farther from the boss 1). A metal bush 4 having an outer diameter of 45 mm and a thickness of 5 mm is insert-molded on the boss 1, and the periphery of the bush 4 is wrapped with resin. A gate is disposed in the molding die at a position corresponding to the boss 1, and the resin is injected into the die cavity from here. The injected resin passes through the mold cavity corresponding to the web 3 from the boss 1 and fills the mold cavity corresponding to the outer peripheral surface 2. After the filling, the injection pressure is continuously applied until the resin in the gate portion is cured, and the pressure is released after the resin is cured. Then, when the entire pulley is sufficiently hardened, the mold is opened, taken out and naturally cooled to about room temperature, and then the gate portion is removed.

【0010】実施例1 従来例1で説明した構成を基本とし、図1に示すよう
に、円還状の溝6をその全周にわたり所定間隔で埋めて
リブ7,7’を形成する。リブ7は長さ30mmであり、
3個を等角度で配置してある。リブ7’は長さ10mmで
あり、リブ7同士の間にそれぞれ3個ずつ配置してあ
る。隣合うリブ7同士ならびに隣合うリブ7,7’は全
て等角度となるよう、リブ7,7’を配置してある。
Embodiment 1 Based on the structure described in the conventional example 1, as shown in FIG. 1, ribs 7 and 7 'are formed by filling a circular groove 6 at a predetermined interval over its entire circumference. The rib 7 is 30 mm long,
Three are arranged at equal angles. The ribs 7 ′ are 10 mm in length, and three ribs 7 ′ are arranged between the ribs 7. The ribs 7, 7 'are arranged so that the adjacent ribs 7 and the adjacent ribs 7, 7' are all at the same angle.

【0011】実施例2 従来例1で説明した構成を基本とし、図2に示すよう
に、円還状の溝6をその全周にわたり所定間隔で埋めて
リブ7を形成する。リブ7は長さ10mmであり、24個
を等角度で配置してある。
Embodiment 2 On the basis of the structure described in the conventional example 1, as shown in FIG. 2, a rib 7 is formed by filling a circular groove 6 at a predetermined interval over its entire circumference. The ribs 7 are 10 mm in length, and 24 ribs are arranged at an equal angle.

【0012】実施例3 従来例1で説明した構成を基本とし、図3に示すよう
に、円還状の溝6を全周そのにわたり所定間隔で埋めて
リブ7を形成する。リブ7は長さ10mmであり、24個
を等角度で配置してある。また、各リブ7と対応する反
対側のウェブ傾斜面の樹脂を除いて樹脂盗み部8を形成
する。樹脂盗み部8は長さ10mmである。
Third Embodiment On the basis of the structure described in the first conventional example, as shown in FIG. 3, a rib 7 is formed by filling a circular groove 6 around the entire circumference at a predetermined interval. The ribs 7 are 10 mm in length, and 24 ribs are arranged at an equal angle. In addition, the resin stealing portion 8 is formed by removing the resin on the opposite web inclined surface corresponding to each rib 7. The resin stealing portion 8 is 10 mm long.

【0013】上記従来例と各実施例の樹脂製プーリにつ
いて、外周面の円筒度を評価した結果を表1に示す。円
筒度の測定はJISB0021「幾何交差の図示方法」
の円筒度定義に適合するよう実施した。測定には三次測
定機を使用し、プーリの中心から外周面の歯の先端まで
の距離を測定する。手順は次のとおりである。 (1)一つのプーリについて、プーリの中心から外周面
の歯の先端までの距離rを、44個の歯毎に測定する。
この距離rの測定は、鍔5側(距離r1)と鍔5を有し
ない側(距離r2)のそれぞれで行なうので、測定デー
タ数は88個である。同様の測定を50個のプーリにつ
いて実施する。 (2)各プーリ毎に、距離rの測定データ88個から最
大値と最小値を抽出し両者の差Δrを求める。表1に示
したΔr最大値は、測定に供したプーリ50個中のΔr
最大値である。また、Δr最小値は、測定に供したプー
リ50個中のΔr最小値である。Δr平均は、測定に供
したプーリ50個のΔr平均である。Δr標準偏差は、
測定に供したプーリ50個のΔr標準偏差である。 (3)各プーリ毎に、距離r1の測定データ44個から
最大値と最小値を抽出し両者の差Δr1を求める。ま
た、各プーリ毎に、距離r2の測定データ44個から最
大値と最小値を抽出し両者の差Δr2を求める。表1に
示した非円(鍔側)の値は、測定に供したプーリ50個の
Δr1の平均値である。表1に示した非円(非鍔側)の値
は、測定に供したプーリ50個のΔr2の平均値であ
る。 (4)同じ歯について測定した距離r1と距離r2の差Δ
12を求め、44個の歯についてのΔr12の中から最大
値を抽出する。表1に示した倒れは、測定に供したプー
リ50個の当該最大値の平均値である。
Table 1 shows the results of evaluating the cylindricity of the outer peripheral surface of the resin pulleys of the above-mentioned conventional example and each of the examples. Measurement of cylindricity is based on JISB0021 "How to show geometric intersections"
The cylindricity was defined as follows. A tertiary measuring machine is used for the measurement, and the distance from the center of the pulley to the tip of the tooth on the outer peripheral surface is measured. The procedure is as follows. (1) For one pulley, the distance r from the center of the pulley to the tip of the tooth on the outer peripheral surface is measured for every 44 teeth.
Since the measurement of the distance r is performed on each of the flange 5 side (distance r 1 ) and the side without the flange 5 (distance r 2 ), the number of measurement data is 88. Similar measurements are performed on 50 pulleys. (2) For each pulley, a maximum value and a minimum value are extracted from 88 pieces of measurement data of the distance r, and the difference Δr between them is obtained. The Δr maximum value shown in Table 1 is the Δr value among 50 pulleys used for the measurement.
This is the maximum value. The Δr minimum value is the Δr minimum value among 50 pulleys used for the measurement. The Δr average is the Δr average of the 50 pulleys used for the measurement. Δr standard deviation is
It is the Δr standard deviation of 50 pulleys used for the measurement. (3) for each pulley, to extract the maximum and minimum values from the measurement data 44 of the distance r 1 calculates a difference [Delta] r 1 therebetween. Also, for each pulley, to extract the maximum and minimum values from the measurement data 44 of the distance r 2 obtains a difference [Delta] r 2 therebetween. The value of the non-circle (flange side) shown in Table 1 is an average value of Δr 1 of 50 pulleys used for the measurement. The value of the non-circle (non-flange side) shown in Table 1 is an average value of Δr 2 of 50 pulleys used for the measurement. (4) Difference Δ between distance r 1 and distance r 2 measured for the same tooth
r 12 is obtained, and the maximum value is extracted from Δr 12 for 44 teeth. The tilt shown in Table 1 is an average value of the maximum values of the 50 pulleys used for the measurement.

【0014】[0014]

【表1】 [Table 1]

【0015】[0015]

【発明の効果】表1から明らかなように、本発明に係る
樹脂製プーリは円筒度が良好である。請求項に係る発明
(実施例3)よれば、円筒度はさらに改善される。
As is clear from Table 1, the resin pulley according to the present invention has good cylindricity. According to the claimed invention (Embodiment 3), the cylindricity is further improved.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係る実施の形態を示す樹脂製プーリの
正面断面図(a)と左側面図(b)及び右側面図(c)
である。
FIG. 1 is a front sectional view (a), a left side view (b), and a right side view (c) of a resin pulley showing an embodiment according to the present invention.
It is.

【図2】本発明に係る別の実施の形態を示す樹脂製プー
リの正面断面図(a)と左側面図(b)及び右側面図
(c)である。
FIG. 2 is a front sectional view (a), a left side view (b), and a right side view (c) of a resin pulley showing another embodiment according to the present invention.

【図3】本発明に係るさらに別の実施の形態を示す樹脂
製プーリの正面断面図(a)と左側面図(b)及び右側
面図(c)である。
FIG. 3 is a front sectional view (a), a left side view (b), and a right side view (c) of a resin pulley showing still another embodiment according to the present invention.

【図4】従来の一般的な樹脂製プーリの正面断面図
(a)と左側面図(b)及び右側面図(c)である。
FIG. 4 is a front sectional view (a), a left side view (b), and a right side view (c) of a conventional general resin pulley.

【図5】本発明が対象とする従来の樹脂製プーリの正面
断面図(a)と左側面図(b)及び右側面図(c)であ
る。
FIG. 5 is a front sectional view (a), a left side view (b), and a right side view (c) of a conventional resin pulley to which the present invention is applied.

【符号の説明】[Explanation of symbols]

1はボス 2は外周面 3はウェブ 4は金属製ブッシュ 5は鍔 6は溝 7,7’はリブ 8は樹脂盗み部 1 is a boss 2 is an outer peripheral surface 3 is a web 4 is a metal bush 5 is a flange 6 is a groove 7, 7 is a rib 8 is a resin steal portion

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】主要部が、回転軸への取付け箇所を備えた
ボスと、ベルトを掛ける外周面と、外周面の内側でボス
と外周面の間をつないだウェブとで構成されており、金
型内でボスに対応する箇所から樹脂を射出して成形され
たプーリであって、 ウェブの周辺部分を外周面軸方向に対して傾斜させボス
とウェブが皿形ないしは椀形の形状を形作ることによ
り、ボスが外周面軸方向中央部から一方の側へ片寄った
位置に配置され、 前記皿形ないしは椀形の外側において外周面とウェブと
が両者の一体化部分に円還状の溝を構成している樹脂製
プーリにおいて、 前記円環状の溝を全周にわたって所定間隔で埋めリブを
形成したことを特徴とする樹脂製プーリ。
The main part is composed of a boss provided with a place to be attached to a rotating shaft, an outer peripheral surface on which a belt is hung, and a web connecting the boss and the outer peripheral surface inside the outer peripheral surface, A pulley formed by injecting resin from the location corresponding to the boss in the mold. The peripheral portion of the web is inclined with respect to the axial direction of the outer peripheral surface, and the boss and the web form a dish or bowl shape. Thereby, the boss is disposed at a position offset from the axially central portion of the outer peripheral surface to one side, and the outer peripheral surface and the web form a circular groove in an integrated portion of the outer periphery of the dish-shaped or bowl-shaped portion. The resin pulley according to claim 1, wherein the annular groove is filled at predetermined intervals around the entire circumference to form ribs.
【請求項2】リブを形成した位置に対応する反対側ウェ
ブ傾斜面の樹脂を取り除いた樹脂盗み部を形成した請求
項1記載の樹脂製プーリ。
2. The resin pulley according to claim 1, wherein a resin stealing portion is formed by removing the resin on the opposite web inclined surface corresponding to the position where the rib is formed.
JP10340216A 1998-11-30 1998-11-30 Resin pulley Pending JP2000161472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10340216A JP2000161472A (en) 1998-11-30 1998-11-30 Resin pulley

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10340216A JP2000161472A (en) 1998-11-30 1998-11-30 Resin pulley

Publications (1)

Publication Number Publication Date
JP2000161472A true JP2000161472A (en) 2000-06-16

Family

ID=18334814

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10340216A Pending JP2000161472A (en) 1998-11-30 1998-11-30 Resin pulley

Country Status (1)

Country Link
JP (1) JP2000161472A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011114642A1 (en) * 2010-03-15 2011-09-22 マブチモーター株式会社 Worm wheel, reduction gear, and motor with reduction gear
EP2175169A3 (en) * 2008-10-07 2011-12-07 NTN Corporation Pulley and rolling bearing with resin pulley

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2175169A3 (en) * 2008-10-07 2011-12-07 NTN Corporation Pulley and rolling bearing with resin pulley
WO2011114642A1 (en) * 2010-03-15 2011-09-22 マブチモーター株式会社 Worm wheel, reduction gear, and motor with reduction gear
CN102803789A (en) * 2010-03-15 2012-11-28 马渊马达株式会社 Worm wheel, reduction gear, and motor with reduction gear
CN102803789B (en) * 2010-03-15 2015-11-25 马渊马达株式会社 The motor of turbine, speed reducer and band speed reducer
US9222547B2 (en) 2010-03-15 2015-12-29 Mabuchi Motor Co., Ltd. Worm wheel, reducer, and motor with the reducer

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