JP2008232328A - Pulley unit - Google Patents

Pulley unit Download PDF

Info

Publication number
JP2008232328A
JP2008232328A JP2007074275A JP2007074275A JP2008232328A JP 2008232328 A JP2008232328 A JP 2008232328A JP 2007074275 A JP2007074275 A JP 2007074275A JP 2007074275 A JP2007074275 A JP 2007074275A JP 2008232328 A JP2008232328 A JP 2008232328A
Authority
JP
Japan
Prior art keywords
shaft body
coil spring
torsion coil
pulley
shaft
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.)
Granted
Application number
JP2007074275A
Other languages
Japanese (ja)
Other versions
JP4816529B2 (en
Inventor
Hajime Watanabe
肇 渡邉
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.)
JTEKT Corp
Original Assignee
JTEKT Corp
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 JTEKT Corp filed Critical JTEKT Corp
Priority to JP2007074275A priority Critical patent/JP4816529B2/en
Publication of JP2008232328A publication Critical patent/JP2008232328A/en
Application granted granted Critical
Publication of JP4816529B2 publication Critical patent/JP4816529B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/20—Freewheels or freewheel clutches with expandable or contractable clamping ring or band
    • F16D41/206—Freewheels or freewheel clutches with expandable or contractable clamping ring or band having axially adjacent coils, e.g. helical wrap-springs
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
    • F16D3/12—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted for accumulation of energy to absorb shocks or vibration

Landscapes

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulley unit, in which a shaft body part can receive an end surface of a torsion coil spring with simple structure, and which is very effective for cost reduction. <P>SOLUTION: The torsion coil spring 80 which can absorb rotational fluctuation and transmit torque is interposed between the shaft body 10 and a pulley side outer ring body 20 concentrically arranged to an outer circumference of the shaft body 10. The shaft body 10 is made from metallic material, and a bottomed-cylindrical cylinder shaft part 15 is formed to the outer circumference of one end of the shaft body 10 so as to define an annular recess part 16 between the circumferential surface of the shaft body 10 and the cylinder shaft part 15. A sprag 60 is assembled to the annular recess part 16, and the sprag 60 has an inner circumferential engagement surface 62 and an outer circumferential engagement surface 61 bit into and engaged between the outer circumferential surface of the shaft body 10 and an inner circumferential surface of the cylinder shaft part 15. The end surface 84 of the torsion coil spring 80 is abutted to and received by the sprag 60. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、軸体と、この軸体の外周に同心状に配設されるプーリ側外輪体との間に回転変動を吸収してトルク伝達可能な捩りコイルバネが介在されたプーリユニットに関する。   The present invention relates to a pulley unit in which a torsion coil spring capable of absorbing torque fluctuation and transmitting torque is interposed between a shaft body and a pulley-side outer ring body arranged concentrically on the outer periphery of the shaft body.

この種のプーリユニットにおいては、主としてエンジンの補機類（オルタネータ、エアコンディショナ用コンプレッサ、ウオーターポンプ、冷却ファン等）に用いられる。
従来、例えば、エンジンの補機類の一つであるオルタネータに採用されるプーリユニットは、エンジンのクランクシャフトのトルクが伝達される伝動ベルトが掛け渡されるプーリと、補機類としてのオルタネータのロータ（ロータ軸）に一体回転可能に連結される軸体とを備える。
また、この種のプーリユニットにおいて、図４と図５に示すように、プーリ１２０と軸体１１０との間に、プーリ１２０から軸体１１０へトルクを伝達させたり遮断させる一方向クラッチとしてのバネクラッチ１５１と、回転変動を吸収する捩りコイルバネ１８０とが介在された構造のものが知られている（特許文献１参照）。
すなわち、図４と図５に示すプーリユニットにおいては、摩擦力によってトルク伝達する摩擦層を外周面に有するバネクラッチ１５１がプーリ１２０の内周面に沿って配置され、このバネクラッチ１５１の一方の端末部１５４が、軸体１１０の外周面とプーリ１２０の内周面との間に回転可能に配置された環状の連結体１４０の外周面に連結され、他方の端末部１５５が自由端をなっている。
また、捩りコイルバネ１８０は、その両端末巻回部１８１、１８３の各端面１８２、１８４のうち、一方の端面１８２が環状の連結体１４０に形成された螺旋状座面１４３の端部の係合面（図示しない）に当接し、他方の端面１８４が軸体１１０の螺旋状座面１１７の端部の係合面１１８に当接して受け止められた状態で、プーリ１２０と軸体１１０とをトルク伝達可能に接続している。
また、軸体１１０は、金属材によって形成され、その一端部外周には、軸体１１０の外周面との間に環状凹部１１６を隔てて有底筒状の筒軸部１１５が形成される。そして、図５に示すように、筒軸部１１５の底面には、螺旋状座面１１７が形成され、その螺旋状座面１１７の上傾端に、筒軸部１１５の底面から直角に立ち上がる係合面１１８が形成されている。
特表２００１−５２３３２５号公報 This type of pulley unit is mainly used for engine accessories (alternator, compressor for air conditioner, water pump, cooling fan, etc.).
2. Description of the Related Art Conventionally, for example, a pulley unit employed in an alternator, which is one of engine accessories, includes a pulley around which a transmission belt to which the torque of an engine crankshaft is transmitted and a rotor of an alternator as an accessory. A shaft body coupled to the (rotor shaft) so as to be integrally rotatable.
Further, in this type of pulley unit, as shown in FIGS. 4 and 5, a spring as a one-way clutch that transmits or blocks torque from the pulley 120 to the shaft body 110 between the pulley 120 and the shaft body 110. A structure having a clutch 151 and a torsion coil spring 180 that absorbs rotational fluctuation is known (see Patent Document 1).
That is, in the pulley unit shown in FIGS. 4 and 5, a spring clutch 151 having a friction layer for transmitting torque by friction force on the outer peripheral surface is disposed along the inner peripheral surface of the pulley 120. The terminal portion 154 is connected to the outer peripheral surface of an annular connecting body 140 that is rotatably disposed between the outer peripheral surface of the shaft body 110 and the inner peripheral surface of the pulley 120, and the other terminal portion 155 has a free end. ing.
The torsion coil spring 180 is engaged with the end of the spiral seating surface 143 in which one end surface 182 of the end surfaces 182 and 184 of the both end winding portions 181 and 183 is formed in the annular coupling body 140. Torque the pulley 120 and the shaft body 110 with the other end surface 184 in contact with and received by the engagement surface 118 at the end of the spiral seating surface 117 of the shaft body 110. It is connected so that it can be transmitted.
The shaft body 110 is formed of a metal material, and a cylindrical shaft portion 115 having a bottomed cylindrical shape is formed on the outer periphery of one end portion of the shaft body 110 with an annular recess 116 between the shaft body 110 and the outer peripheral surface of the shaft body 110. Then, as shown in FIG. 5, a spiral seat surface 117 is formed on the bottom surface of the cylindrical shaft portion 115, and the spiral seat surface 117 rises at a right angle from the bottom surface of the cylindrical shaft portion 115. A mating surface 118 is formed.
JP-T-2001-523325

ところで、図４と図５に示す従来のプーリユニットにおいては、金属製の軸体１１０の一端部外周の大径部（筒軸部１１５）に対し、環状凹部１１６、螺旋状座面１１７及び係合面１１８を、切削加工（例えば、エンドミルを用いたフライス加工）によって形成しなければならなず、その加工に多くの手間や時間が必要となり、コスト高となっていた。   By the way, in the conventional pulley unit shown in FIG. 4 and FIG. The mating surface 118 has to be formed by cutting (for example, milling using an end mill), which requires a lot of labor and time, and the cost is high.

この発明の目的は、前記問題点に鑑み、捩りコイルバネの端面を簡単な構造によって軸体側で受け止めることができ、コスト低減に効果が大きいプーリユニットを提供することである。   In view of the above problems, an object of the present invention is to provide a pulley unit capable of receiving the end face of a torsion coil spring on the shaft body side with a simple structure and having a great effect on cost reduction.

前記目的を達成するために、この発明の請求項１に係るプーリユニットは、軸体と、この軸体の外周に同心状に配設されるプーリ側外輪体との間に回転変動を吸収してトルク伝達可能な捩りコイルバネが介在されたプーリユニットであって、
前記軸体は、金属材によって形成され、その一端部外周には前記軸体の外周面との間に環状凹部を隔てる有底筒状の筒軸部が形成され、
前記環状凹部には、前記軸体の外周面と前記筒軸部の内周面との間に噛み込んで係合する内周係合面と外周係合面とをそれぞれ有するスプラグが組み込まれ、
前記捩りコイルバネの端面が前記スプラグに当接して受け止められることを特徴とする。 In order to achieve the above object, a pulley unit according to claim 1 of the present invention absorbs rotational fluctuations between a shaft body and a pulley-side outer ring body disposed concentrically on the outer periphery of the shaft body. A pulley unit intervening a torsion coil spring capable of transmitting torque,
The shaft body is formed of a metal material, and a cylindrical shaft portion having a bottomed cylindrical shape that forms an annular recess between the outer peripheral surface of the shaft body is formed on an outer periphery of the one end portion,
In the annular recess, a sprag having an inner peripheral engagement surface and an outer peripheral engagement surface respectively engaged and engaged between the outer peripheral surface of the shaft body and the inner peripheral surface of the cylindrical shaft portion is incorporated.
An end face of the torsion coil spring contacts and is received by the sprag.

前記構成によると、軸体の外周面と筒軸部の内周面との間の所望とする位置に、スプラグの内周係合面と外周係合面とを係合させて噛み込ませることで、スプラグを容易に固定することができる。そして、捩りコイルバネの端面をスプラグに当接させることによって、捩りコイルバネの端面を良好に受け止めてトルク伝達することができる。
このようにして、軸体の外周面と筒軸部の内周面との間の所望とする位置にスプラグを噛み込ませる簡単な構造によって捩りコイルバネの端面を軸体側で受け止めることができ、コスト低減に効果が大きい。 According to the above configuration, the inner peripheral engagement surface and the outer peripheral engagement surface of the sprag are engaged with each other at a desired position between the outer peripheral surface of the shaft body and the inner peripheral surface of the cylindrical shaft portion. Thus, the sprag can be easily fixed. Then, by bringing the end surface of the torsion coil spring into contact with the sprag, the end surface of the torsion coil spring can be received well and torque can be transmitted.
In this way, the end surface of the torsion coil spring can be received on the shaft body side by a simple structure in which the sprag is inserted into a desired position between the outer peripheral surface of the shaft body and the inner peripheral surface of the cylindrical shaft portion, and the cost is reduced. Great effect for reduction.

この発明の請求項２に係るプーリユニットは、請求項１に記載のプーリユニットであって、
環状凹部の底面には、捩りコイルバネの端末巻回部を支承する螺旋状座面を有するバネ座部材が移動可能に設置されていることを特徴とする。
前記構成によると、環状凹部の底面に移動可能に設置されたバネ座部材の螺旋状座面によって捩りコイルバネの端末巻回部を安定よく支承することができる。
特に、捩りコイルバネの弾性変形（弾性的な拡径及び縮径）時において、その捩りコイルバネの端末巻回部の弾性変形に追従してバネ座部材が移動することで、捩りコイルバネの端末巻回部の弾性変形を阻害することを軽減することができる。この結果、捩りコイルバネは円滑に弾性変形するため、回動変動の吸収性の向上を図ることができる。 A pulley unit according to claim 2 of the present invention is the pulley unit according to claim 1,
A spring seat member having a spiral seat surface for supporting the terminal winding portion of the torsion coil spring is movably installed on the bottom surface of the annular recess.
According to the said structure, the terminal winding part of a torsion coil spring can be stably supported by the helical seat surface of the spring seat member installed so that the movement to the bottom face of the annular recessed part was possible.
In particular, when the torsion coil spring is elastically deformed (elastically expanding and contracting), the spring seat member moves following the elastic deformation of the end winding portion of the torsion coil spring, so that the end winding of the torsion coil spring is performed. Inhibiting the elastic deformation of the portion can be reduced. As a result, the torsion coil spring is smoothly elastically deformed, so that it is possible to improve the absorbability of rotational fluctuation.

次に、この発明を実施するための最良の形態を実施例にしたがって説明する。   Next, the best mode for carrying out the present invention will be described with reference to examples.

（実施例１）
この発明の実施例１を図１〜図３にしたがって説明する。
図１はこの発明の実施例１に係るプーリユニットを示す側断面図である。図２は図１のＩＩ−ＩＩ線に基づく横断面図である。図３は捩りコイルバネ、軸体、スプラグ及びバネ座部材の関係を分離して示す斜視図である。 Example 1
A first embodiment of the present invention will be described with reference to FIGS.
1 is a side sectional view showing a pulley unit according to Embodiment 1 of the present invention. 2 is a cross-sectional view based on the line II-II in FIG. FIG. 3 is a perspective view showing the relationship among the torsion coil spring, shaft, sprag, and spring seat member separately.

図１に示すように、この実施例１に係るプーリユニットは、車載用エンジンの補機類の一つであるオルタネータに使用される場合を例示するものであり、軸体１０、プーリ２０、連結体４０、捩りコイルバネ８０、転がり軸受３０及びすべり軸受３５を備える。   As illustrated in FIG. 1, the pulley unit according to the first embodiment exemplifies a case where the pulley unit is used in an alternator that is one of auxiliary components of an in-vehicle engine. A body 40, a torsion coil spring 80, a rolling bearing 30 and a sliding bearing 35 are provided.

図１に示すように、軸体１０は、オルタネータのロータのロータ軸（図示しない）の先端部軸回りに沿って筒軸状に形成されている。そして、軸体１０の内孔の両端部のうち、一方の端部内周面には、ロータ軸の先端側に形成された雄ねじ部に締め付けられる雌ねじ１２が形成され、他方の端部内周面には、締付工具が嵌合可能な締付部１３が形成されている。
また、軸体１０は、金属材によって形成され、その他方の端部の外周面には、軸体１０の外周面との間に環状凹部１６を隔てる有底筒状の筒軸部１５が形成されている（図３参照）。 As shown in FIG. 1, the shaft body 10 is formed in a cylindrical shaft shape around the tip portion axis of the rotor shaft (not shown) of the rotor of the alternator. Of the both ends of the inner hole of the shaft body 10, a female screw 12 that is fastened to a male screw portion formed on the tip end side of the rotor shaft is formed on one end inner circumferential surface, and the other end inner circumferential surface is formed. Is formed with a fastening portion 13 into which a fastening tool can be fitted.
Further, the shaft body 10 is formed of a metal material, and a bottomed cylindrical tube shaft portion 15 is formed on the outer peripheral surface of the other end portion to separate the annular recess 16 from the outer peripheral surface of the shaft body 10. (See FIG. 3).

図１に示すように、プーリ２０は、軸体１０の外周に同心に配置され、その内孔の両端部のうち、一方の端部内周面が転がり軸受３０によって軸体１０の外周に回転可能に支持され、他方の端部内周面がすべり軸受３５によって、軸体１０の筒軸部１５外周に回転可能に支持される。なお、転がり軸受３０として深溝玉軸受が用いられ、その外輪３１がプーリ２０の一方の端部内周面に圧入固定されている。また、内輪３２は軸体１０の外周面に圧入されかつ軸体１０の端部がカシメられてカシメ部９０が形成されることによって軸体１０の外周面に固定されている。そして、外輪３１と内輪３２の両軌道面の間に複数個の玉３３が保持器によって保持された状態で転動可能に配設されている。
また、プーリ２０の外周面には伝動ベルト８が掛け渡される断面波形状のベルト溝２１が形成されている。なお、伝動ベルト８は、エンジンのクランクシャフトのプーリに掛け渡され、クランクシャフトのトルクをプーリ２０に伝達するようになっている。 As shown in FIG. 1, the pulley 20 is disposed concentrically on the outer periphery of the shaft body 10, and one end inner peripheral surface of the inner holes of the pulley 20 can be rotated around the shaft body 10 by the rolling bearing 30. The inner peripheral surface of the other end portion is rotatably supported on the outer periphery of the cylindrical shaft portion 15 of the shaft body 10 by the slide bearing 35. A deep groove ball bearing is used as the rolling bearing 30, and the outer ring 31 is press-fitted and fixed to the inner peripheral surface of one end of the pulley 20. Further, the inner ring 32 is fixed to the outer peripheral surface of the shaft body 10 by being press-fitted into the outer peripheral surface of the shaft body 10 and the end portion of the shaft body 10 being caulked to form a caulking portion 90. A plurality of balls 33 are arranged between the raceways of the outer ring 31 and the inner ring 32 so as to be able to roll while being held by a cage.
In addition, a belt groove 21 having a corrugated cross section is formed on the outer peripheral surface of the pulley 20 so as to span the transmission belt 8. The transmission belt 8 is wound around a pulley of the crankshaft of the engine and transmits the torque of the crankshaft to the pulley 20.

図１に示すように、軸体１０の外周面とプーリ２０の内周面との間の環状空間には、プーリ側外輪体としての環状の連結体４０が配設されている。この連結体４０の一端側はプーリ２０の内周面に連結固定され、他端側内周面には、捩りコイルバネ８０に対応する凹部４２が形成されている。そして、凹部４２の底面には、係合面（図示しない）を一端に有する螺旋状座面４３が形成されている。
なお、環状の連結体４０は、剛性を有する硬質の合成樹脂材による射出成形によって一体に形成されると同時に、結合部４１、凹部４２及び係合面（図示しない）を一端に有する螺旋状座面４３とが形成される。 As shown in FIG. 1, an annular coupling body 40 as a pulley-side outer ring body is disposed in an annular space between the outer peripheral surface of the shaft body 10 and the inner peripheral surface of the pulley 20. One end side of the connecting body 40 is connected and fixed to the inner peripheral surface of the pulley 20, and a concave portion 42 corresponding to the torsion coil spring 80 is formed on the inner peripheral surface of the other end side. A spiral seat surface 43 having an engagement surface (not shown) at one end is formed on the bottom surface of the recess 42.
The annular coupling body 40 is integrally formed by injection molding using a rigid synthetic resin material having rigidity, and at the same time, a spiral seat having a coupling portion 41, a concave portion 42, and an engagement surface (not shown) at one end. A surface 43 is formed.

図１〜図３に示すように、捩りコイルバネ８０は、平板のバネ線材が螺旋状に巻回されて形成されている。そして、捩りコイルバネ８０は、軸体１０の外周面に沿って配設され、その両端末巻回部８１、８３のうち、一方の端末巻回部８１が連結体４０の凹部４２の螺旋状座面４３に支承されると共に、一方の端末巻回部８１の端面８２が螺旋状座面４３端部の係合面（図示しない）に当接して係合している。   As shown in FIGS. 1 to 3, the torsion coil spring 80 is formed by spirally winding a flat spring wire. The torsion coil spring 80 is disposed along the outer peripheral surface of the shaft body 10, and one of the terminal winding portions 81, 83 is the spiral seat of the concave portion 42 of the coupling body 40. While being supported by the surface 43, the end surface 82 of one terminal winding portion 81 is in contact with and engaged with an engagement surface (not shown) at the end of the spiral seat surface 43.

前記した金属製の軸体１０において、有底状の筒軸部１５の環状凹部１６内には、スプラグ６０と、バネ座部材７０とが配設されている。
スプラグ６０は、瓢箪形状に形成され、その外周係合面６１が筒軸部１５の内周面に接し、内周係合面６２が軸体１０の外周面に接した状態で、スプラグ６０が筒軸部１５の内周面と軸体１０の外周面との間に噛み込んで係合することで、環状凹部１６内の所望とする位置に固定されて組み付けられる。そして、図２に示すように、捩りコイルバネ８０の他方の端末巻回部８３の端面８４がスプラグ６０の内径側突部６３に当接して受け止められる。
また、図３に示すように、バネ座部材７０は、螺旋形状に形成され形成され、その一側には捩りコイルバネ８０の他方の端末巻回部８３を支承する螺旋状座面７１が形成され、反対面は平坦面に形成されて環状凹部１６の底面１６ａに移動可能に設置されている。
また、バネ座部材７０は、成形性や製造コスト等を考慮すると、合成樹脂材の射出成形によって形成することが望ましい。 In the metal shaft 10 described above, a sprag 60 and a spring seat member 70 are disposed in the annular recess 16 of the bottomed cylindrical shaft portion 15.
The sprag 60 is formed in a bowl shape, and the sprag 60 is in a state where the outer peripheral engagement surface 61 is in contact with the inner peripheral surface of the cylindrical shaft portion 15 and the inner peripheral engagement surface 62 is in contact with the outer peripheral surface of the shaft body 10. By engaging and engaging between the inner peripheral surface of the cylindrical shaft portion 15 and the outer peripheral surface of the shaft body 10, the cylindrical shaft portion 15 is fixed and assembled at a desired position in the annular recess 16. As shown in FIG. 2, the end face 84 of the other terminal winding portion 83 of the torsion coil spring 80 is in contact with and received by the inner diameter side protrusion 63 of the sprag 60.
As shown in FIG. 3, the spring seat member 70 is formed and formed in a spiral shape, and a spiral seat surface 71 that supports the other end winding portion 83 of the torsion coil spring 80 is formed on one side thereof. The opposite surface is formed as a flat surface and is movably installed on the bottom surface 16 a of the annular recess 16.
The spring seat member 70 is preferably formed by injection molding of a synthetic resin material in consideration of moldability, manufacturing cost, and the like.

この実施例１に係るプーリユニットは上述したように構成される。
したがって、プーリ２０側からのトルクがクラッチバネ５１を経て連結体４０に伝達されると、その連結体４０のトルクが捩りコイルバネ８０によって軸体１０に伝達される。そして、トルク伝達時の回動変動が捩りコイルバネ８０の弾性変形（弾性的な拡径及び縮径）によって吸収されるため、ベルトの滑り、バタツキ、異音等の発生が抑制される。 The pulley unit according to the first embodiment is configured as described above.
Therefore, when torque from the pulley 20 side is transmitted to the coupling body 40 via the clutch spring 51, the torque of the coupling body 40 is transmitted to the shaft body 10 by the torsion coil spring 80. Further, since the rotational fluctuation at the time of torque transmission is absorbed by the elastic deformation (elastic diameter expansion and contraction) of the torsion coil spring 80, the occurrence of belt slip, fluttering, abnormal noise and the like is suppressed.

また、捩りコイルバネ８０の他方の端末巻回部８３の端面８４を軸体１０側で受け止めるために、軸体１０の外周面と筒軸部１５の内周面との間にスプラグ６０を噛み込ませて組み付けることによって容易に対処することができる。
また、軸体１０の外周面と筒軸部１５の内周面との間の所望とする位置に、スプラグ６０の外周係合面６１と内周係合面６２とを係合させて噛み込ませることで、スプラグ６０を容易に固定して組み付けることができる。そして、スプラグ６０によって捩りコイルバネ８０の他方の端末巻回部８３の端面８４を良好に受け止めてトルク伝達することができる。
このようにして、軸体１０の外周面と筒軸部１５の内周面との間にスプラグ６０を噛み込ませて組み付ける簡単な構造によって、捩りコイルバネ８０の他方の端末巻回部８３の端面８４を軸体１０側のスプラグ６０によって受け止めることができるため、エンドミルを用いたフライス加工によって、螺旋状座面と係合面とを切削加工する従来と比べ、コスト低減に効果が大きい。 Further, in order to receive the end surface 84 of the other terminal winding portion 83 of the torsion coil spring 80 on the shaft body 10 side, the sprag 60 is inserted between the outer peripheral surface of the shaft body 10 and the inner peripheral surface of the cylindrical shaft portion 15. It can be easily dealt with by assembling.
Further, the outer peripheral engagement surface 61 and the inner peripheral engagement surface 62 of the sprag 60 are engaged with each other at a desired position between the outer peripheral surface of the shaft body 10 and the inner peripheral surface of the cylindrical shaft portion 15. Accordingly, the sprag 60 can be easily fixed and assembled. Then, the sprag 60 can satisfactorily receive the end face 84 of the other end winding portion 83 of the torsion coil spring 80 and transmit the torque.
In this way, the end surface of the other end winding portion 83 of the torsion coil spring 80 is obtained by a simple structure in which the sprag 60 is fitted between the outer peripheral surface of the shaft body 10 and the inner peripheral surface of the cylindrical shaft portion 15. 84 can be received by the sprags 60 on the shaft body 10 side, so that the effect of cost reduction is great compared to the conventional method in which the spiral seating surface and the engagement surface are cut by milling using an end mill.

また、この実施例１において、軸体１０の筒軸部１５に形成された環状凹部１６の底面にバネ座部材７０が移動可能に設置され、このバネ座部材７０の螺旋状座面７１によって捩りコイルバネ８０の他方の端末巻回部８３を安定よく支承することができる。
特に、捩りコイルバネ８０の弾性変形（弾性的な拡径及び縮径）時において、その捩りコイルバネ８０の他方の端末巻回部８３の弾性変形に追従してバネ座部材７０が僅かではあるが移動する。これによって、捩りコイルバネ８０の他方の端末巻回部８３の弾性変形を阻害することを軽減することができる。この結果、捩りコイルバネ８０は円滑に弾性変形するため、回動変動の吸収性の向上を図ることができる。 In the first embodiment, the spring seat member 70 is movably installed on the bottom surface of the annular recess 16 formed in the cylindrical shaft portion 15 of the shaft body 10, and is twisted by the spiral seat surface 71 of the spring seat member 70. The other terminal winding part 83 of the coil spring 80 can be supported stably.
In particular, when the torsion coil spring 80 is elastically deformed (elastically expanded and contracted), the spring seat member 70 moves slightly following the elastic deformation of the other end winding portion 83 of the torsion coil spring 80. To do. Accordingly, it is possible to reduce the hindrance to the elastic deformation of the other terminal winding portion 83 of the torsion coil spring 80. As a result, the torsion coil spring 80 is elastically deformed smoothly, so that it is possible to improve the absorbability of rotational fluctuation.

なお、この発明は前記実施例１に限定するものではない。
例えば、前記実施例１においては、軸体１０の外周面とプーリ２０の内周面との間にプーリ側外輪体としての連結体４０が配置され、捩りコイルバネ８０が連結体４０を介してプーリ２０に連結される場合を例示したが、連結体４０がないプーリユニットの場合においてもこの発明を実施することができる。但し、この場合には、プーリ２０がプーリ側外輪体を構成する。また、一方向クラッチ機構が組み付けられるプーリユニットの場合においてもこの発明を実施することができる。
また、前記実施例１においては、エンジンの補機類の一つであるオルタネータに対応するプーリユニットである場合を例示したが、エアコンディショナ用コンプレッサ、ウオーターポンプ、冷却ファン等のエンジンの補機類に対応するプーリユニットとして使用可能である。 The present invention is not limited to the first embodiment.
For example, in the first embodiment, the connecting body 40 as the pulley-side outer ring body is disposed between the outer peripheral surface of the shaft body 10 and the inner peripheral surface of the pulley 20, and the torsion coil spring 80 is connected to the pulley via the connecting body 40. Although the case where it connects with 20 was illustrated, this invention can be implemented also in the case of the pulley unit which does not have the connection body 40. FIG. However, in this case, the pulley 20 forms a pulley-side outer ring body. The present invention can also be implemented in the case of a pulley unit to which a one-way clutch mechanism is assembled.
In the first embodiment, the pulley unit corresponding to the alternator, which is one of the engine auxiliary machines, is exemplified. However, the engine auxiliary machines such as the compressor for the air conditioner, the water pump, and the cooling fan are used. It can be used as a pulley unit corresponding to the same type.

この発明の実施例１に係るプーリユニットを示す側断面図である。It is a sectional side view which shows the pulley unit which concerns on Example 1 of this invention. 同じく図１のＩＩ−ＩＩ線に基づく横断面図である。It is a transverse cross section similarly based on the II-II line of FIG. 同じく捩りコイルバネ、軸体、スプラグ及びバネ座部材の関係を分離して示す斜視図である。It is a perspective view which isolate | separates and similarly shows the relationship between a torsion coil spring, a shaft, a sprag, and a spring seat member. 従来のプーリユニットを示す側断面図である。It is side sectional drawing which shows the conventional pulley unit. 同じく捩りコイルバネと軸体の関係を分離して示す斜視図である。It is a perspective view which isolate | separates and similarly shows the relationship between a torsion coil spring and a shaft.

符号の説明Explanation of symbols

１０ 軸体
１５ 筒軸部
１６ 環状凹部
２０ プーリ（プーリ側外輪体）
４０ 環状の連結体（プーリ側外輪体）
６０ スプラグ
６１ 外周係合面
６２ 内周係合面
７０ バネ座部材
７１ 螺旋状座面
８０ 捩りコイルバネ
８３ 他方の端末巻回部
８４ 端面 DESCRIPTION OF SYMBOLS 10 Shaft body 15 Cylinder shaft part 16 Annular recessed part 20 Pulley (pulley side outer ring body)
40 Annular coupling body (pulley side outer ring body)
60 sprag 61 outer peripheral engagement surface 62 inner peripheral engagement surface 70 spring seat member 71 spiral seat surface 80 torsion coil spring 83 other terminal winding portion 84 end surface

Claims (2)

軸体と、この軸体の外周に同心状に配設されるプーリ側外輪体との間に回転変動を吸収してトルク伝達可能な捩りコイルバネが介在されたプーリユニットであって、
前記軸体は、金属材によって形成され、その一端部外周には前記軸体の外周面との間に環状凹部を隔てる有底筒状の筒軸部が形成され、
前記環状凹部には、前記軸体の外周面と前記筒軸部の内周面との間に噛み込んで係合する内周係合面と外周係合面とをそれぞれ有するスプラグが組み込まれ、
前記捩りコイルバネの端面が前記スプラグに当接して受け止められることを特徴とするプーリユニット。 A pulley unit in which a torsion coil spring capable of absorbing rotational fluctuation and transmitting torque is interposed between a shaft body and a pulley-side outer ring body disposed concentrically on the outer periphery of the shaft body,
The shaft body is formed of a metal material, and a cylindrical shaft portion having a bottomed cylindrical shape that forms an annular recess between the outer peripheral surface of the shaft body is formed on an outer periphery of the one end portion,
In the annular recess, a sprag having an inner peripheral engagement surface and an outer peripheral engagement surface respectively engaged and engaged between the outer peripheral surface of the shaft body and the inner peripheral surface of the cylindrical shaft portion is incorporated.
A pulley unit characterized in that an end face of the torsion coil spring is received by being brought into contact with the sprag. 請求項１に記載のプーリユニットであって、
環状凹部の底面には、捩りコイルバネの端末巻回部を支承する螺旋状座面を有するバネ座部材が移動可能に設置されていることを特徴とするプーリユニット。 The pulley unit according to claim 1,
A pulley unit characterized in that a spring seat member having a spiral seat surface for supporting a terminal winding portion of a torsion coil spring is movably installed on the bottom surface of the annular recess.
JP2007074275A 2007-03-22 2007-03-22 Pulley unit Expired - Fee Related JP4816529B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007074275A JP4816529B2 (en) 2007-03-22 2007-03-22 Pulley unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007074275A JP4816529B2 (en) 2007-03-22 2007-03-22 Pulley unit

Publications (2)

Publication Number Publication Date
JP2008232328A true JP2008232328A (en) 2008-10-02
JP4816529B2 JP4816529B2 (en) 2011-11-16

Family

ID=39905371

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007074275A Expired - Fee Related JP4816529B2 (en) 2007-03-22 2007-03-22 Pulley unit

Country Status (1)

Country Link
JP (1) JP4816529B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012215254A (en) * 2011-04-01 2012-11-08 Jtekt Corp Pulley unit
JP2015521723A (en) * 2012-06-20 2015-07-30 デイコ アイピー ホールディングス, エルエルシーDayco Ip Holdings, Llc Attached device drive cutting device
JP2017523364A (en) * 2014-08-08 2017-08-17 ゲイツ コーポレイション Isolating pulley
JP2018200102A (en) * 2017-05-26 2018-12-20 三ツ星ベルト株式会社 Pulley structure
EP3805612A4 (en) * 2018-05-24 2022-03-30 Mitsuboshi Belting Ltd. Pulley structure
US11428305B2 (en) 2018-05-24 2022-08-30 Mitsuboshi Belting Ltd. Pulley structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02145343U (en) * 1989-05-12 1990-12-10
JP2005533980A (en) * 2002-07-26 2005-11-10 リテンス オートモーティヴ Decoupler pulley for overrun alternator with bare wire spring and grease lubrication
JP2006022884A (en) * 2004-07-07 2006-01-26 Mitsuboshi Belting Ltd Pulley with damper
JP2006070931A (en) * 2004-08-31 2006-03-16 Jtekt Corp Power transmission device
JP2006336735A (en) * 2005-06-01 2006-12-14 Oki Electric Ind Co Ltd Spring assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02145343U (en) * 1989-05-12 1990-12-10
JP2005533980A (en) * 2002-07-26 2005-11-10 リテンス オートモーティヴ Decoupler pulley for overrun alternator with bare wire spring and grease lubrication
JP2006022884A (en) * 2004-07-07 2006-01-26 Mitsuboshi Belting Ltd Pulley with damper
JP2006070931A (en) * 2004-08-31 2006-03-16 Jtekt Corp Power transmission device
JP2006336735A (en) * 2005-06-01 2006-12-14 Oki Electric Ind Co Ltd Spring assembly

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012215254A (en) * 2011-04-01 2012-11-08 Jtekt Corp Pulley unit
JP2015521723A (en) * 2012-06-20 2015-07-30 デイコ アイピー ホールディングス, エルエルシーDayco Ip Holdings, Llc Attached device drive cutting device
JP2017523364A (en) * 2014-08-08 2017-08-17 ゲイツ コーポレイション Isolating pulley
JP2018200102A (en) * 2017-05-26 2018-12-20 三ツ星ベルト株式会社 Pulley structure
JP6993930B2 (en) 2017-05-26 2022-01-14 三ツ星ベルト株式会社 Pulley structure
EP3805612A4 (en) * 2018-05-24 2022-03-30 Mitsuboshi Belting Ltd. Pulley structure
US11428305B2 (en) 2018-05-24 2022-08-30 Mitsuboshi Belting Ltd. Pulley structure

Also Published As

Publication number Publication date
JP4816529B2 (en) 2011-11-16

Similar Documents

Publication Publication Date Title
JP4816529B2 (en) Pulley unit
US20070240964A1 (en) Spring Clutch
JP2007113634A (en) Pulley structure
KR20170116038A (en) Pulley decoupler
JP4219374B2 (en) mechanical seal
JP2008232329A (en) Pulley unit
JP2006234008A (en) Pulley device with built-in one-way clutch
US20090071788A1 (en) One-way clutch
JP4853105B2 (en) One-way clutch built-in pulley device
JP2005163932A (en) Pulley unit
JP2007333166A (en) Torque fluctuation absorbing damper
JP2006009899A (en) Power transmission
JP2018179293A (en) Pulley structure
JP6316080B2 (en) Starter
JP2009097712A (en) Pulley unit
JP4940995B2 (en) One-way clutch
JP2006077939A (en) Power transmission device
JP5045644B2 (en) One-way clutch and one-way clutch built-in pulley device
JP5353869B2 (en) Pulley device with built-in one-way clutch for automotive auxiliary equipment
JP4320997B2 (en) One-way clutch
JP5871122B2 (en) Pulley unit
JP2006017133A (en) Bearing device
JP2010025013A (en) Camshaft device
JP2009079672A (en) Pulley unit
JP2007040421A (en) Cage for rolling bearing

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20100222

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110726

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110802

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110815

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140909

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees