JP2013104450A - Resin pulley - Google Patents

Resin pulley Download PDF

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JP2013104450A
JP2013104450A JP2011246781A JP2011246781A JP2013104450A JP 2013104450 A JP2013104450 A JP 2013104450A JP 2011246781 A JP2011246781 A JP 2011246781A JP 2011246781 A JP2011246781 A JP 2011246781A JP 2013104450 A JP2013104450 A JP 2013104450A
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extension line
pulley
resin pulley
belt
resin
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JP5952547B2 (en
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Naonobu Hiromachi
尚信 廣町
Masahito Ogiwara
雅人 荻原
Ryohei Adachi
良平 安達
Hisayoshi Ono
尚由 小野
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Yamada Manufacturing Co Ltd
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Yamada Seisakusho KK
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Abstract

PROBLEM TO BE SOLVED: To provide a resin pulley, which is lightweight, has a small boss part, and has a secured strength.SOLUTION: The resin pulley is comprised of: a metallic bushing A formed with, along the circumferential direction, a protrusion part 2 which is protruded in a diametrical direction on an outer circumferential side surface of an annular part 1 and from an axial middle portion; and a resin pulley body B having a pulley boss part 3 having an inner circumferential side on which the protrusion part 2 is inserted, a bowl-shaped part 4 in a conical shape formed with the pulley boss part 3 as the diametrical center, and an outer tube part 5 formed with a belt running part 51 formed on the outer circumference of the bowl-shaped part 4. It is configured such that at least a part of the protrusion part 2 is positioned in an area between an extension line La of an inner side surface 41 of the bowl-shaped part 4 and an extension line Lb of the outer side surface 42, and the extension line Lb of the outer side surface 42 and the protruded part 2 do not intersect.

Description

本発明は、軽量でボス部を小形とし且つ強度が確保された樹脂プーリに関する。   The present invention relates to a resin pulley that is lightweight, has a small boss portion, and has a sufficient strength.

車両用のプーリの中には、強度を維持しつつ軽量化を実現するために、内周部分にブッシュを配置し、外周部分に樹脂を配置した樹脂製の樹脂プーリが存在する。この種のものが特許文献１に開示されている。以下に、特許文献１について概略する。なお、以下の説明において、部材に付された符号は、特許文献１に記載されたものをそのまま使用する。   Among pulleys for vehicles, in order to achieve weight reduction while maintaining strength, there is a resin-made resin pulley in which a bush is disposed on an inner peripheral portion and a resin is disposed on an outer peripheral portion. This type is disclosed in Patent Document 1. The outline of Patent Document 1 will be described below. In addition, in the following description, the code | symbol attached | subjected to the member uses what was described in patent document 1 as it is.

樹脂プーリ本体ｂの外筒８の軸方向中心Ｃ０は、ベルトが掛かるベルト幅中央（ベルトセンター）となる位置である。外向き環状部４の軸方向中心Ｃ１は、樹脂プーリ本体ｂの外筒８の軸方向中心Ｃ０とは軸方向にオフセットＯＳだけずれて配置されている。   The axial center C0 of the outer cylinder 8 of the resin pulley body b is a position that is the belt width center (belt center) where the belt is applied. The axial center C1 of the outward annular portion 4 is disposed so as to be offset from the axial center C0 of the outer cylinder 8 of the resin pulley body b by an offset OS in the axial direction.

このような状態でベルト荷重が掛かると樹脂プーリ本体ｂは、ずれて移動する側（左側）に倒れようとする力が掛かる。また、上記とは別に、外筒８の軸方向中心Ｃ０と外向き環状部４の軸方向中心Ｃ１とはオフセットＯＳだけずれて配置されているため、外筒８と外向き環状部４との間の内向き環状部１０は、本願において従来技術を示す図５で見ると左上から右下に橋渡しされるように配置されている。   When a belt load is applied in such a state, the resin pulley main body b is subjected to a force that tends to fall on the side (left side) that moves in a shifted manner. In addition to the above, the axial center C0 of the outer cylinder 8 and the axial center C1 of the outward annular portion 4 are arranged so as to be shifted by the offset OS, so that the outer cylinder 8 and the outward annular portion 4 The inward annular portion 10 is arranged so as to be bridged from the upper left to the lower right when viewed in FIG.

実開平５−２２９２３号公報Japanese Utility Model Publication No. 5-22923

特許文献１において、ベルト荷重は、本願の従来技術を示す図５に示すように、傾斜方向に作用する。このベルト荷重のかかる方向を矢印で示すと、環状段差部４ｂは前記矢印（本願の従来技術を示す図５に記載された仮想の矢印）より下側（内周）に存在するもので、力の作用する範囲から外れている。したがって、ベルト荷重による力を環状段差部４ｂは、直接受け止めることは出来ない。   In Patent Document 1, the belt load acts in the tilt direction as shown in FIG. 5 showing the prior art of the present application. When the direction in which this belt load is applied is indicated by an arrow, the annular step portion 4b is present on the lower side (inner circumference) than the arrow (the imaginary arrow shown in FIG. 5 showing the prior art of the present application). It is out of the range where Therefore, the annular step 4b cannot directly receive the force due to the belt load.

つまり、環状段差部４ｂは、補強の機能が十分に果たされていない。その結果として特許文献１のプーリの強度は低いものであるという課題があった。また、ベルト荷重による力は外向き環状部４の中でも環状段差部４ｂ以外の部分で主に受け止められる。   That is, the annular step portion 4b does not sufficiently perform the reinforcing function. As a result, there has been a problem that the strength of the pulley of Patent Document 1 is low. Further, the force due to the belt load is mainly received in the outward annular portion 4 other than the annular step portion 4b.

よって、樹脂プーリ本体ｂの強度を保つため、厚肉嵌合部分６ｂを厚肉として補強するため、樹脂プーリ本体ｂは厚くなり、且つ重量が増してしまうという課題があった。本発明の目的（解決しようとする技術的課題）は、強度を向上させると共に、ボス部箇所を小型化することで重量の小さい樹脂プーリを提供することにある。   Therefore, in order to maintain the strength of the resin pulley main body b and reinforce the thick fitting portion 6b as a thick wall, there is a problem that the resin pulley main body b becomes thick and increases in weight. An object (technical problem to be solved) of the present invention is to provide a resin pulley having a small weight by improving strength and reducing the size of a boss portion.

そこで、発明者は上記課題を解決すべく鋭意，研究を重ねた結果、請求項１の発明を、環状部の外周側面で且つ軸方向中間箇所から直径方向に突出すると共に周方向に沿って突出部が形成された金属製のブッシュと、前記突出部が内周側にインサートされるプーリボス部と該プーリボス部を直径中心として形成される円錐形状の椀状部と該椀状部の外周に形成されたベルト掛部が形成された外筒部を有する樹脂プーリ本体とからなり、前記椀状部の内側面の延長線と、外側面の延長線との間の領域に、前記突出部の少なくとも一部が位置し、且つ前記外側面の延長線と、前記突出部とは交わらない構成としてなる樹脂プーリとしたことにより、上記課題を解決した。   Accordingly, as a result of intensive researches to solve the above problems, the inventor protrudes the invention of claim 1 in the diameter direction from the outer peripheral side surface of the annular portion and in the axial direction and along the circumferential direction. A metal bush having a portion formed thereon, a pulley boss portion into which the protruding portion is inserted on the inner peripheral side, a conical hook-shaped portion formed around the pulley boss portion as a diameter center, and an outer periphery of the hook-shaped portion A resin pulley main body having an outer tube portion formed with a belt hanging portion, and at least a portion of the projecting portion in a region between an extension line of the inner side surface of the hook-like portion and an extension line of the outer side surface. The above-mentioned problem has been solved by providing a resin pulley in which a part is located and the extension line of the outer surface and the protruding portion do not intersect.

請求項２の発明を、請求項１において、前記内側面の延長線と、前記外側面の延長線との間の領域に前記外筒部のベルト掛部の中心が位置する構成としてなる樹脂プーリとしたことにより、上記課題を解決した。請求項３の発明を、請求項１又は２において、前記内側面の延長線と、前記外側面の延長線との間の領域にゲート入口部が位置する構成としてなる樹脂プーリとしたことにより、上記課題を解決した。   According to a second aspect of the present invention, there is provided the resin pulley according to the first aspect, wherein the center of the belt hanging portion of the outer cylinder portion is located in a region between the extension line of the inner side surface and the extension line of the outer side surface. As a result, the above problems were solved. The invention of claim 3 is the resin pulley according to claim 1 or 2, wherein the gate inlet is located in a region between the extension line of the inner side surface and the extension line of the outer side surface. Solved the above problem.

請求項１の発明では、椀状部の内側面の延長線と、外側面の延長線との間の領域に、突出部の少なくとも一部が位置する構成としたことにより、少なくとも突出部の最外端が内側面の延長線に交わることになる。そのために、椀状部に沿って伝達されたベルト荷重を、強度が高い金属製のブッシュの突出部で受け止めることが出来る。これによって樹脂プーリの強度を向上させることができる。   According to the first aspect of the present invention, at least a part of the protrusion is located in a region between the extension line of the inner surface of the bowl-shaped part and the extension line of the outer surface. The outer end will meet the extension of the inner surface. Therefore, the belt load transmitted along the flange portion can be received by the protruding portion of the metal bush having high strength. Thereby, the strength of the resin pulley can be improved.

また、椀状部の内側面の延長線上と、外側面の延長線上との間の領域に突出部の少なくとも一部が位置することになり、つまり、突出部は外側面の延長線とは交わることなく突出しないので、突出部を小さいものとでき、金属製のブッシュの外径を小さくして軽量化を実現することができる。よって、樹脂プーリの強度を保ちながらも樹脂プーリの全重量を軽量のものに出来る。   Further, at least a part of the projecting portion is located in a region between the extension line of the inner surface of the bowl-shaped portion and the extension line of the outer surface, that is, the projection portion intersects with the extension line of the outer surface. Since the protrusion does not protrude without any problem, the protrusion can be made small, and the outer diameter of the metal bush can be reduced to achieve weight reduction. Therefore, the total weight of the resin pulley can be reduced while maintaining the strength of the resin pulley.

請求項２の発明では、外筒部のベルト掛部の軸方向中心位置は、前記内側面の延長線と前記外側面の延長線の範囲内に存在させたことにより、ベルト荷重の発生点であるベルト掛部の中心位置が内側面の延長線と、外側面の延長線との間の領域に配置されることになる。   In the invention of claim 2, the axial center position of the belt hanging portion of the outer cylinder portion is within the range of the extension line of the inner side surface and the extension line of the outer side surface. The center position of a certain belt hook portion is arranged in a region between the extension line of the inner side surface and the extension line of the outer side surface.

それゆえに、ベルト掛部の軸方向中心、椀状部及び突出部が略一直線に並び、ベルト荷重が椀状部に沿って、突出部に集中し易くなり、突出部はより一層確実にベルト荷重を受け止めることができ、突出部による補強機能が有効に働くものである。   Therefore, the center of the belt in the axial direction, the hook-shaped portion and the protruding portion are aligned substantially in a straight line, and the belt load tends to concentrate on the protruding portion along the hook-shaped portion, and the protruding portion is more reliably belt load. The reinforcement function by the protrusion works effectively.

請求項３の発明では、内側面の延長線と、外側面の延長線との間の領域に樹脂プーリ本体を成形するゲート入口部が位置するようにしたことで、椀状部における樹脂成形において、樹脂は層流に流れ、成形性を向上させることができる。   In the invention of claim 3, in the resin molding in the bowl-shaped portion, the gate inlet portion for molding the resin pulley main body is located in the region between the extension line of the inner side surface and the extension line of the outer side surface. The resin flows in a laminar flow, and the moldability can be improved.

（Ａ）は本発明の縦断側面図、（Ｂ）は（Ａ）の（ア）部拡大図である。(A) is a vertical side view of the present invention, and (B) is an enlarged view of part (A) of (A). （Ａ）は本発明において、ベルト荷重に対するブッシュの突出部の作用を示す要部拡大縦断側面である。(A) is the principal part expansion vertical side surface which shows the effect | action of the protrusion part of the bush with respect to a belt load in this invention. （Ａ），（Ｂ）はブッシュの突出部の一部である最外端が樹脂プーリ本体における内側面の延長線と、外側面の延長線との間に挟まれた領域に位置している構成の変形例を示した要部拡大縦断側面である。(A), (B) is located in the area | region where the outermost end which is a part of protrusion part of a bush is pinched | interposed between the extension line of the inner surface in the resin pulley main body, and the extension line of an outer surface It is the principal part expansion vertical side surface which showed the modification of the structure. （Ａ）はブッシュがインサートされた樹脂プーリ本体の一部切除した正面図、（Ｂ）は（Ａ）の（イ）部拡大図、（Ｃ）はブッシュの斜視図、（Ｄ）は（Ｃ）の（ウ）部拡大図である。(A) is a partially cut away front view of a resin pulley body into which a bush is inserted, (B) is an enlarged view of (A) of (A), (C) is a perspective view of the bush, (D) is (C) FIG. 従来技術を示す一部省略した要部縦断側面図である。It is a principal part vertical side view which abbreviate | omitted the part which shows a prior art.

以下、本発明の実施形態について図面に基づいて説明する。本発明は、図１に示すように、金属製のブッシュＡと、樹脂プーリ本体Ｂとから構成され、ブッシュＡが前記樹脂プーリ本体Ｂにインサートされつつモールド成形されて、プーリが形成されるものである。ブッシュＡは、環（リング）形状の環状部１と、環状部１の外周側面に形成される突出部２から構成される。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the present invention comprises a metal bush A and a resin pulley body B, and the bush A is molded while being inserted into the resin pulley body B to form a pulley. It is. The bush A includes an annular portion 1 having a ring shape and a protruding portion 2 formed on the outer peripheral side surface of the annular portion 1.

本発明では、ブッシュＡ及び樹脂プーリ本体Ｂにおいて共通する軸方向が設定され、共に直径方向に対して直交する方向を軸方向とし、本発明に係る部材について軸方向は共通する。図１（Ａ）には、軸方向を示す軸方向線Ｌが示されている。   In the present invention, a common axial direction is set in the bush A and the resin pulley main body B, and the direction perpendicular to the diametrical direction is the axial direction, and the axial direction is common to the members according to the present invention. FIG. 1A shows an axial line L indicating the axial direction.

環状部１は、内周側に軸孔１１が貫通孔として形成され，プーリを駆動するシャフト７が挿通される〔図１（Ａ）参照〕。また、シャフト７の長手方向は、前記軸方向と一致する。該シャフト７は、圧入、リング止め、接着等の方法により固着される。前記ブッシュＡの環状部１の外周側には、周方向に沿って突出部２が形成されている。また、突出部２は、環状部１の軸方向において、中間（略中間も含む）箇所に形成される〔図４（Ｂ）乃至（Ｄ）参照〕。   In the annular portion 1, a shaft hole 11 is formed as a through hole on the inner peripheral side, and a shaft 7 for driving a pulley is inserted [see FIG. 1 (A)]. The longitudinal direction of the shaft 7 coincides with the axial direction. The shaft 7 is fixed by a method such as press-fitting, ring fastening, or adhesion. On the outer peripheral side of the annular portion 1 of the bush A, a protruding portion 2 is formed along the circumferential direction. Moreover, the protrusion part 2 is formed in the intermediate | middle (including substantially intermediate | middle) location in the axial direction of the annular part 1 [refer FIG. 4 (B) thru | or (D)].

突出部２は、略ギア（歯車）形状をなしており、複数の歯形２１，２１、…から構成され、前記環状部１の外周側面に等間隔に形成されたものである〔図４（Ｃ），（Ｄ）参照〕。歯形の形状としてはセレーション歯等である。突出部２の軸方向寸法（厚さ寸法）は、環状部１の軸方向寸法（厚さ寸法）よりも薄く形成されている。   The protrusion 2 has a substantially gear shape (gear), is constituted by a plurality of tooth shapes 21, 21,... And is formed on the outer peripheral side surface of the annular portion 1 at equal intervals [FIG. ), See (D)]. The shape of the tooth profile is a serrated tooth or the like. The axial dimension (thickness dimension) of the protruding part 2 is formed thinner than the axial dimension (thickness dimension) of the annular part 1.

したがって、突出部２の軸方向両側には環状部１の外周側面の突出する部位が存在し、この外周部位を周側面１２，１２と称する。該周側面１２は、環状部１の外周側面であり、軸方向に平行な面である〔図４（Ｃ），（Ｄ）参照〕。ブッシュＡは、たとえば、金属粉を焼き固めた焼結体にて形成されている。したがって、切削加工では無く金型によって形成することができる。また、ブッシュＡは金属粉を焼き固めた焼結体には限定されるものではなく、通常の金属製であればよい。   Accordingly, there are protruding portions on the outer peripheral side surface of the annular portion 1 on both axial sides of the protruding portion 2, and these outer peripheral portions are referred to as peripheral side surfaces 12 and 12. The peripheral side surface 12 is an outer peripheral side surface of the annular portion 1 and is a surface parallel to the axial direction (see FIGS. 4C and 4D). The bush A is formed of, for example, a sintered body obtained by baking and solidifying metal powder. Therefore, it can be formed not by cutting but by a mold. The bush A is not limited to a sintered body obtained by baking and solidifying metal powder, and may be made of a normal metal.

また、前記ブッシュＡの環状部１の外周側と、突出部２との間には円周状膨出部１３が形成されることもある。該円周状膨出部１３は、突出部２と軸方向寸法が同一であり、円周状膨出部１３の軸方向両側に前記両周側面１２，１２が位置することになる。   Further, a circumferential bulging portion 13 may be formed between the outer peripheral side of the annular portion 1 of the bush A and the protruding portion 2. The circumferential bulging portion 13 has the same axial dimension as the protruding portion 2, and the circumferential side surfaces 12, 12 are located on both sides in the axial direction of the circumferential bulging portion 13.

そして、円周状膨出部１３の外周面にギア形状とした突出の歯が歯形２１，２１，…が周方向に沿って複数形成される。円周状膨出部１３は、環状部１において周方向に沿って形成された円筒状の部位であり、樹脂プーリ本体Ｂへのインサートモールド成形では、突出部２と共に、樹脂プーリ本体Ｂの内部に食い込み、軸方向における強度を向上させることができる。   .. Are formed on the outer peripheral surface of the circumferential bulging portion 13 along the circumferential direction. The circumferential bulging portion 13 is a cylindrical portion formed along the circumferential direction in the annular portion 1, and in the insert molding to the resin pulley main body B, the inside of the resin pulley main body B together with the protruding portion 2. The strength in the axial direction can be improved.

次に、樹脂プーリ本体Ｂは、プーリボス部３と、椀状部４と、ベルト掛用の外筒部５とから構成されている（図１参照）。樹脂プーリ本体Ｂは、グラスファイバー等の繊維が含有されたフェノール樹脂等の樹脂製であり、前記ブッシュＡの外周面部分を包み込むように形成されている。   Next, the resin pulley main body B is composed of a pulley boss portion 3, a hook-like portion 4, and an outer cylinder portion 5 for hanging the belt (see FIG. 1). The resin pulley main body B is made of a resin such as a phenol resin containing fibers such as glass fibers, and is formed so as to wrap around the outer peripheral surface portion of the bush A.

具体的には、プーリボス部３にブッシュＡがインサートモールド成形にて装着される。プーリボス部３は、椀状部４の直径中心位置において軸方向及び直径方向に厚肉の膨出部位として形成され、略円筒形状であり、ブッシュＡの突出部２及び円周状膨出部１３が食い込めるように構成されている。ブッシュＡが樹脂プーリ本体Ｂへインサートされた状態は、ブッシュＡの軸方向両端側面がプーリボス部３の軸方向端面に対して同一面（略同一面も含む）としている。   Specifically, the bush A is attached to the pulley boss portion 3 by insert molding. The pulley boss portion 3 is formed as a thick bulging portion in the axial direction and the diametrical direction at the diameter center position of the flange-shaped portion 4 and has a substantially cylindrical shape, and the protruding portion 2 of the bush A and the circumferential bulging portion 13. Is configured to bite in. In the state where the bush A is inserted into the resin pulley body B, both axial side surfaces of the bush A are the same surface (including substantially the same surface) with respect to the axial end surface of the pulley boss portion 3.

椀状部４は、前記プーリボス部３の外周から直径方向に拡がるようにして略扁平円錐形の椀形状に形成された部位である。椀状部４は、プーリボス部３と外筒部５と連続する付根箇所を除いて、その肉厚は、均一であり、いずれの位置でも略同一厚さを有している。椀状部４は、扁平円錐形状としたものであり、内側面４１と外側面４２を有している（図１参照）。   The hook-shaped portion 4 is a portion formed in a substantially flat conical hook shape so as to expand in the diameter direction from the outer periphery of the pulley boss portion 3. The flange portion 4 is uniform in thickness except for a root portion continuous with the pulley boss portion 3 and the outer cylinder portion 5, and has substantially the same thickness at any position. The bowl-shaped part 4 is a flat conical shape, and has an inner side surface 41 and an outer side surface 42 (see FIG. 1).

前記内側面４１は、椀状部４における扁平円錐形状の凹状側の側壁面であり、また、外側面４２は凸状側の側壁面である。内側面４１と外側面４２は、軸方向断面で見ると直線状に形成されている。また、内側面４１と外側面４２との間隔は、椀状部４の肉厚となる。また、扁平円錐形状の椀状部４の直径方向における面の傾斜角度は、全周面で一定に形成され、具体的には約３０度程度である。つまり、椀状部４の内側面４１及び外側面４２の軸方向に直交する垂直面に対して約３０度程度傾いている。   The inner side surface 41 is a flat conical concave side wall surface of the bowl-shaped portion 4, and the outer side surface 42 is a convex side wall surface. The inner surface 41 and the outer surface 42 are formed in a straight line when viewed in the axial section. Further, the distance between the inner surface 41 and the outer surface 42 is the thickness of the bowl-shaped portion 4. Moreover, the inclination angle of the surface in the diameter direction of the flat cone-shaped bowl-shaped portion 4 is formed to be constant on the entire circumferential surface, specifically about 30 degrees. That is, it is inclined about 30 degrees with respect to a vertical plane perpendicular to the axial direction of the inner side surface 41 and the outer side surface 42 of the bowl-shaped portion 4.

椀状部４の直径方向外端にはベルト掛用の外筒部５が形成されている。該外筒部５には、ベルト掛部５１が形成され、該ベルト掛部５１は、複数のベルト溝５１ａ，５１ａ，…が形成されている〔図１（Ｂ）参照〕。外筒部５は、椀状部４の内側面４１側に偏って形成されている。   An outer cylinder portion 5 for hanging a belt is formed at the outer end in the diameter direction of the flange portion 4. A belt hook portion 51 is formed in the outer cylinder portion 5, and the belt hook portion 51 is formed with a plurality of belt grooves 51a, 51a,... [See FIG. The outer cylinder portion 5 is formed so as to be biased toward the inner surface 41 side of the bowl-shaped portion 4.

つまり、外筒部５は、椀状部４の外周端部から内側面４１側にずれる（オフセットされる）位置関係を有するものである（図１参照）。さらに、具体的には、ベルト掛部５１の軸方向中心Ｐは内側面４１の延長線Ｌａよりも外側になるように、且つ外側面４２の延長線Ｌｂよりも内側になるように形成されている。   That is, the outer cylinder part 5 has a positional relationship that is shifted (offset) from the outer peripheral end of the bowl-shaped part 4 toward the inner side surface 41 (see FIG. 1). More specifically, the axial center P of the belt hanging portion 51 is formed so as to be outside the extension line La of the inner side surface 41 and inside the extension line Lb of the outer side surface 42. Yes.

ベルト６は、無端のＶベルトであり、帯状部６１の内周側に前記ベルト掛部５１のベルト溝５１ａ，５１ａ，…と同等形状且つ同等数のＶ形凸条６２，６２，…が形成されている。ベルト６の軸方向中心位置は、外筒部５のベルト掛部５１の軸方向中心Ｐに一致するようになっている。   The belt 6 is an endless V-belt, and V-shaped ridges 62, 62,... Having the same shape and the same number as the belt grooves 51a, 51a,. Has been. The axial center position of the belt 6 coincides with the axial center P of the belt hook portion 51 of the outer cylinder portion 5.

外筒部５には、ベルト６が巻き掛けられて、ベルト掛部５１の軸方向中心Ｐに直径方向に張力がかかると、実際には、椀状部４に、その直径方向外周側から中心側に沿ってベルト荷重Ｗが伝達されてゆく〔図１（Ｂ）、図２参照〕。そして内側面４１の延長線Ｌａ上と、外側面４２の延長線Ｌｂ上とに挟まれ、且つベルト荷重Ｗを伝達する領域にブッシュＡの突出部２の一部である最外端が位置して、交わっている〔図１（Ｂ）、図２参照〕。   When the belt 6 is wound around the outer cylindrical portion 5 and a tension is applied to the axial center P of the belt hanging portion 51 in the diametrical direction, the flange portion 4 is actually centered from the outer peripheral side in the diametrical direction. The belt load W is transmitted along the side (see FIG. 1B and FIG. 2). And the outermost end which is a part of the protrusion part 2 of the bush A is located in the area | region which is pinched on the extension line La of the inner surface 41, and the extension line Lb of the outer side surface 42, and transmits the belt load W. [See FIG. 1B and FIG. 2].

このような構成としたことによって、ベルト荷重Ｗがベルト掛部５１の軸方向中心Ｐから椀状部４の延長方向に沿って伝達されたときに、金属製であるブッシュＡの突出部２の最外端がベルト荷重Ｗを受け止める（図２参照）。これによって、ベルト荷重Ｗによる樹脂プーリ本体Ｂの強度が向上し、優れた耐久性を有することができる。つまり、ブッシュＡの突出部２の一部である最外端の部分がベルト荷重Ｗが伝わる内側面４１の延長線Ｌａ上に位置し、そのベルト荷重Ｗを遮断して押し返すように作用するものである。   With such a configuration, when the belt load W is transmitted from the axial center P of the belt hanging portion 51 along the extending direction of the hook-shaped portion 4, the protruding portion 2 of the bush A made of metal is used. The outermost end receives the belt load W (see FIG. 2). Thereby, the strength of the resin pulley main body B due to the belt load W is improved, and excellent durability can be obtained. That is, the outermost end portion, which is a part of the protruding portion 2 of the bush A, is located on the extension line La of the inner side surface 41 through which the belt load W is transmitted, and acts to interrupt and push back the belt load W. It is.

また、内側面４１の延長線Ｌａと、外側面４２の延長線Ｌｂとの間に挟まれた領域にブッシュＡの突出部２の一部である最外端が位置していることから、ブッシュＡの突出部２は、外側面４２の延長線Ｌｂを越えて突出形成されるものではない。これによりブッシュＡの突出部２を小形にでき、コンパクトで、重量を軽減することができる。   Further, since the outermost end which is a part of the protruding portion 2 of the bush A is located in a region sandwiched between the extension line La of the inner surface 41 and the extension line Lb of the outer surface 42, the bush The protruding portion 2 of A is not formed so as to protrude beyond the extension line Lb of the outer surface 42. Thereby, the protrusion part 2 of the bush A can be made small, and it is compact and can reduce a weight.

さらに、前記内側面４１の延長線Ｌａと、前記外側面４２の延長線Ｌｂとの間の領域に突出部２の一部である最外端と、ベルト掛部５１の軸方向中心Ｐと、プーリボス部３の樹脂成形のゲート入口部３１が位置する構成とすることもある。該ゲート入口部３１は、プーリボス部３とブッシュＡとの境界となる円周の適宜の位置に存在する。   Furthermore, the outermost end which is a part of the protruding portion 2 in the region between the extension line La of the inner side surface 41 and the extension line Lb of the outer side surface 42, the axial center P of the belt hooking portion 51, In some cases, the resin inlet gate entrance 31 of the pulley boss 3 is located. The gate inlet portion 31 is present at an appropriate position on the circumference serving as a boundary between the pulley boss portion 3 and the bush A.

そして、ゲート入口部３１が前記内側面４１の延長線Ｌａと、前記外側面４２の延長線Ｌｂとの間の領域に存在することで、プーリボス部３のゲート入口部３１が位置する、金型にて本発明における樹脂プーリを成形するときに、溶融した樹脂が最も層流的に流れ、品質が良好なプーリボス部３，椀状部４及び外筒部５が形成できる。   A mold in which the gate inlet portion 31 of the pulley boss portion 3 is located because the gate inlet portion 31 exists in a region between the extension line La of the inner side surface 41 and the extension line Lb of the outer side surface 42. When the resin pulley according to the present invention is molded, the molten resin flows most laminarly, and the pulley boss part 3, the bowl-shaped part 4 and the outer cylinder part 5 with good quality can be formed.

また、図３は、ブッシュＡの突出部２の一部である最外端が、樹脂プーリ本体Ｂにおける内側面４１の延長線Ｌａと、外側面４２の延長線Ｌｂとの間に挟まれた領域に位置している構成の変形例を示したものである。そして、図３（Ａ）は、ブッシュＡの突出部２の軸方向における厚さ寸法を比較的大きく設定したものであり、図３（Ｂ）は突出部２の直径方向における高さ寸法を比較的大きく設定したものである。   3 shows that the outermost end, which is a part of the protruding portion 2 of the bush A, is sandwiched between the extension line La of the inner side surface 41 and the extension line Lb of the outer side surface 42 in the resin pulley main body B. The modification of the structure located in the area | region is shown. FIG. 3A shows a comparatively large thickness dimension in the axial direction of the protrusion 2 of the bush A, and FIG. 3B compares the height dimension in the diameter direction of the protrusion 2. This is a large setting.

１…環状部、２…突出部、Ａ…ブッシュ、３…プーリボス部、４…椀状部、
５…外筒部、Ｂ…樹脂プーリ本体、４１…内側面、４２…外側面、
Ｌａ…内側面の延長線、Ｌｂ…外側面の延長線。 DESCRIPTION OF SYMBOLS 1 ... Annular part, 2 ... Projection part, A ... Bush, 3 ... Pulley boss | hub part, 4 ... Gutter-shaped part,
5 ... outer cylinder part, B ... resin pulley main body, 41 ... inner side surface, 42 ... outer side surface,
La ... Extension line of inner side surface, Lb ... Extension line of outer side surface.

Claims (3)

環状部の外周側面で且つ軸方向中間箇所から直径方向に突出すると共に周方向に沿って突出部が形成された金属製のブッシュと、前記突出部が内周側にインサートされるプーリボス部と該プーリボス部を直径中心として形成される円錐形状の椀状部と該椀状部の外周に形成されたベルト掛部が形成された外筒部を有する樹脂プーリ本体とからなり、前記椀状部の内側面の延長線と、外側面の延長線との間の領域に、前記突出部の少なくとも一部が位置し、且つ前記外側面の延長線と前記突出部とは交わらない構成としてなることを特徴とする樹脂プーリ。   A metal bush that protrudes in a diametrical direction from an axially outer peripheral side surface of the annular portion and has a protrusion formed along the circumferential direction; a pulley boss portion into which the protrusion is inserted on the inner peripheral side; and A conical hook-shaped part formed around the pulley boss part and a resin pulley main body having an outer cylinder part formed with a belt hook part formed on the outer periphery of the hook-shaped part. At least a part of the projecting portion is located in a region between an extension line of the inner surface and an extension line of the outer surface, and the extension line of the outer surface and the projecting portion do not intersect with each other. Characteristic resin pulley. 請求項１において、前記内側面の延長線と、前記外側面の延長線との間の領域に前記外筒部のベルト掛部の中心が位置する構成としてなることを特徴とする樹脂プーリ。   2. The resin pulley according to claim 1, wherein the center of the belt hook portion of the outer cylinder portion is located in a region between the extension line of the inner side surface and the extension line of the outer side surface. 請求項１又は２において、前記内側面の延長線と、前記外側面の延長線との間の領域にゲート入口部が位置する構成としてなることを特徴とする樹脂プーリ。
3. The resin pulley according to claim 1, wherein a gate inlet portion is located in a region between the extension line of the inner side surface and the extension line of the outer side surface.
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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1100747A (en) * 1954-05-18 1955-09-23 Renault Dynamo drive pulley
GB1501408A (en) * 1976-06-30 1978-02-15 Quinton Hazell Holdings Ltd Torque transmitting article
JPS63111367A (en) * 1986-10-27 1988-05-16 エス　ケイ　エフ　ノーバ　エービー Gearing and manufacture thereof
JPH0339651U (en) * 1989-08-29 1991-04-17
EP0573698A1 (en) * 1992-06-11 1993-12-15 Firma Carl Freudenberg Belt pulley
JPH07269680A (en) * 1994-03-30 1995-10-20 Sumitomo Bakelite Co Ltd Insert molding
DE19846339A1 (en) * 1998-10-08 2000-04-27 Freudenberg Carl Fa Pulley wheel for belt drive mechanism incorporates polymer flange bonded to hub, minimizing mechanical vibration and noise emissions
JP2003278888A (en) * 2002-03-25 2003-10-02 Toyoda Mach Works Ltd Pulley made of synthetic resin
JP2003322246A (en) * 2002-04-26 2003-11-14 Toyoda Mach Works Ltd Pulley
JP2004339352A (en) * 2003-05-15 2004-12-02 Nsk Ltd Phenolic resin molding compound and pulley
WO2007057234A1 (en) * 2005-01-14 2007-05-24 Grusan S.R.L. Manufacturing method for producing a pulley of plastic material and pulley produced with such method
US20080161141A1 (en) * 2006-12-27 2008-07-03 Jang-Hyuk Joo Water pump pulley for cooling system of vehicle
JP2010084817A (en) * 2008-09-30 2010-04-15 Ntn Corp Bearing with resin pulley and method of manufacturing the same

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1100747A (en) * 1954-05-18 1955-09-23 Renault Dynamo drive pulley
GB1501408A (en) * 1976-06-30 1978-02-15 Quinton Hazell Holdings Ltd Torque transmitting article
JPS63111367A (en) * 1986-10-27 1988-05-16 エス　ケイ　エフ　ノーバ　エービー Gearing and manufacture thereof
JPH0339651U (en) * 1989-08-29 1991-04-17
EP0573698A1 (en) * 1992-06-11 1993-12-15 Firma Carl Freudenberg Belt pulley
JPH07269680A (en) * 1994-03-30 1995-10-20 Sumitomo Bakelite Co Ltd Insert molding
DE19846339A1 (en) * 1998-10-08 2000-04-27 Freudenberg Carl Fa Pulley wheel for belt drive mechanism incorporates polymer flange bonded to hub, minimizing mechanical vibration and noise emissions
JP2003278888A (en) * 2002-03-25 2003-10-02 Toyoda Mach Works Ltd Pulley made of synthetic resin
JP2003322246A (en) * 2002-04-26 2003-11-14 Toyoda Mach Works Ltd Pulley
JP2004339352A (en) * 2003-05-15 2004-12-02 Nsk Ltd Phenolic resin molding compound and pulley
WO2007057234A1 (en) * 2005-01-14 2007-05-24 Grusan S.R.L. Manufacturing method for producing a pulley of plastic material and pulley produced with such method
US20080161141A1 (en) * 2006-12-27 2008-07-03 Jang-Hyuk Joo Water pump pulley for cooling system of vehicle
JP2010084817A (en) * 2008-09-30 2010-04-15 Ntn Corp Bearing with resin pulley and method of manufacturing the same

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