JP2004316882A - Isolation damper pulley - Google Patents

Isolation damper pulley Download PDF

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Publication number
JP2004316882A
JP2004316882A JP2003146996A JP2003146996A JP2004316882A JP 2004316882 A JP2004316882 A JP 2004316882A JP 2003146996 A JP2003146996 A JP 2003146996A JP 2003146996 A JP2003146996 A JP 2003146996A JP 2004316882 A JP2004316882 A JP 2004316882A
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JP
Japan
Prior art keywords
pulley
isolation
cover
elastic body
damper
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
JP2003146996A
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Japanese (ja)
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JP4314561B2 (en
Inventor
Yoshikazu Kakinuma
良和 柿沼
Shuichi Takatori
修一 鷹取
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.)
Fukoku Co Ltd
Fukoku KK
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Fukoku Co Ltd
Fukoku KK
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Priority to JP2003146996A priority Critical patent/JP4314561B2/en
Publication of JP2004316882A publication Critical patent/JP2004316882A/en
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Publication of JP4314561B2 publication Critical patent/JP4314561B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an isolation damper pulley for preventing intrusion of dust or the like from an arcuate oblong hole 25 formed in a cover part 22B of a pulley portion 22 to the inside of the pulley portion 22. <P>SOLUTION: The isolation damper pulley comprises a torsional damper portion and the isolation pulley portion. The arcuate oblong hole 25 into which a stopper member is inserted is provided in the side end face of the isolation pulley portion. A cover 60 is provided for covering the oblong hole 25. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、自動車などの内燃機関のクランク軸に装着され、このクランク軸に発生する振動を低減するとともに、補機を駆動するプーリはクランク軸の回転変動を伝達せず、スムーズな回転を伝達することができる機能を有するアイソレーション・ダンパプーリに関するものである。
【0002】
【従来の技術】
図3は従来のアイソレーション・ダンパプーリの一部断面図、図4は同アイソレーション・ダンパプーリの側面図である。
図3および図4に示すように、アイソレーション・ダンパプーリは、クランク軸の振動を吸収する捩りダンパ部10と、補機駆動用のプーリを有するアイソレーションプーリ部20とを備えている。
捩りダンパ部10は、センターハブ11、慣性マス12および弾性体13から構成されている。
【0003】
センターハブ11は、内燃機関のクランク軸(不図示)に装着されるボス部(不図示)と、このボス部から放射方向に延出する連結部11Aと、この連結部11Aの周縁部に設けられた円筒状のハブ部11Bとから構成されており、ハブ部11Bの先端部には、慣性マス12の端面よりも軸方向に突出し、後述する円弧状の長孔に挿入されるストッパ14が形成されている。
慣性マス12は、小径部12Aおよび大径部12Bを有する円筒状をなし、この慣性マス12とセンターハブ11のハブ部11Bとの間には、加硫ゴムから構成され、クランク軸の振動を吸収する環状の弾性体13が装着されている。
【0004】
一方、アイソレーションプーリ部20は、支持部材21、プーリ部22および弾性体23から構成されている。
支持部材21は、フランジ21Aを有するリング状をなし、内燃機関のクランク軸と同軸的に配設される。
プーリ部22は、円筒部22Aと蓋部22Bを有する円筒状をなし、円筒面22Aには、補機駆動用のベルト(不図示)が掛け回されるプーリ溝24が形成されており、また、蓋部22Bには、ストッパ14が挿入される円弧状の長孔25が2箇所形成されており、プーリ部22の蓋部22Bと支持部材21のフランジ21Aとの間には、加硫ゴムから構成され、支持部材21とプーリ部22との間で捩り変形を受けることによってクランク軸のトルク変動を吸収する環状の弾性体23が装着されている。
【0005】
図3において、符号30は取付け用ストッパであり、この取付け用ストッパ30は、フランジ30Aを有する円筒状をなし、センターハブ11および支持部材21と溶接されて一体化されている。
また、符号40はジャーナルベアリングであり、このジャーナルベアリング40は、慣性マス12の小径部12Aの外周面とプーリ部22の円筒部22Aの内周面との間に装着されており、また、符号50はスラストベアリングであり、このスラストベアリング50は、プーリ部22の蓋部22Bの表面と取付け用ストッパ30のフランジ30Aの裏面との間に装着されている(例えば、特許文献1参照。)。
【0006】
【特許文献1】
登録実用新案第2605662号公報(第2頁、第3頁、第1図、第2図)
【0007】
【発明が解決しようとする課題】
しかしながら、上述した従来のアイソレーション・ダンパプーリにあっては、プーリ溝に掛け回されたベルトで駆動される補機に不具合が生じ、過大なトルクがベルトを介してプーリ部に加わっても、長孔の端部がストッパに当接してプーリ部を捩りダンパ部と同期回転させるため、アイソレーションプーリ部の弾性体の破損を防止することができるが、円弧状の長孔からプーリ部の内部にダスト等が進入し易く、このため、ジャーナルベアリングの耐久性を低下させるといった問題点があった。
本発明は、上記問題点を解決するために成されたものであり、プーリ部の蓋部に形成した円弧状の長孔からプーリ部の内部にダスト等の進入することのないアイソレーション・ダンパプーリを提供することを目的とする。
【0008】
【課題を解決するための手段】
上記目的を達成するため、請求項1の発明は、捩りダンパ部とアイソレーションプーリ部とを備えたアイソレーション・ダンパプーリであって、前記捩りダンパ部は、内燃機関のクランク軸に装着される第1の支持体と、この第1の支持体の外方に同軸的に配設された慣性マスと、前記第1の支持体と前記慣性マスとの間に配設された第1の弾性体とを備え、前記アイソレーションプーリ部は、前記内燃機関のクランク軸に同軸的に配設される第2の支持体と、この第2の支持体の外方に同軸的に配設され、外周部にプーリ溝を有するプーリ部と、前記第2の支持体と前記プーリ部との間に配設された第2の弾性体とを備え、前記捩りダンパ部の側端面に軸方向に突出するストッパ部材を設け、前記アイソレーションプーリ部の側端面に前記ストッパ部材が挿入される円弧状の長孔を設けるとともに、この長孔を覆うカバーを設けたことを特徴する。
【0009】
また、請求項2の発明は、請求項1の発明において、前記カバーと前記第2の弾性体を同時に加硫形成したことを特徴とする。
さらに、請求項3の発明は、請求項1または2の発明において、前記カバーの一部と前記第2の弾性体の一部は、前記長孔を介して一体化されていることを特徴とする。
【0010】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
図1は本発明の一実施の形態に係るアイソレーション・ダンパプーリの一部断面図、図2は同アイソレーション・ダンパプーリの側面図である。尚、図1および図2において、図3および図4と同一の構成には同一の符号を付してその説明を省略する。
図1および図2に示すように、本実施の形態に係るアイソレーション・ダンパプーリにあっては、プーリ部22の蓋部22Bには、2箇所の円弧状の長孔25、25を蓋部22Bの表面側から覆う環状のカバー60が設けられており、このカバー60は、環状の弾性体23と同一組成の加硫ゴムから構成され、カバー60の一部は、長孔25、25を介して弾性体23の一部と一体化されている。
また、カバー60の裏面とプーリ部22の蓋部22Bの表面とは略面一となっており、また、ストッパ14の先端部は、長孔25内に没しているため、カバー60がストッパ14と機械的に干渉することはない。
尚、図1において、符号60Aはカバー60の一部と弾性体23の一部が一体化された連続部を示す。また、図2において、ハッチングした部位がカバー60を示している。
【0011】
また、カバー60は、弾性体23と同時に加硫形成され、蓋部22Bの表面に加硫接着されており、弾性体23もその一端がプーリ部22の蓋部22Bの裏面に加硫接着され、他端も支持部材21のフランジ21Aの表面に加硫接着されている。
【0012】
本実施の形態に係るアイソレーション・ダンパプーリによれば、2箇所の円弧状の長孔25、25を蓋部22Bの表面側から覆う環状のカバー60を設けたため、長孔25、25からプーリ部22内へのダストなどの進入を防止することができ、これにより、ジャーナルベアリング40の耐久性の低下を招くことはない。
【0013】
また、カバー60は、アイソレーションプーリ部20の弾性体23と同時に加硫形成によって設けられるため、製造コストの上昇を可及的に抑えることができる。
さらに、アイソレーションプーリ部20の回転や振動よって、カバー60に遠心力や振動が作用するが、カバー60は、蓋部22Bの表面に加硫接着されるだけでなく、その一部が長孔25、25を介して弾性体23の一部と一体化されているため、カバー60の剥がれを防止することができる。
【0014】
尚、本実施の形態では、カバー60として環状のカバーを例示したが、カバーは必ずしも環状である必要はなく、長孔25、25の形状に合わせて円弧状としてもよい。また、カバー60は、必ずしも弾性体23と同時に加硫形成する必要もなく、また、カバー60の一部を長孔25、25を介して弾性体23の一部と一体化しなくてもよい。
【0015】
【発明の効果】
以上説明したように、請求項1の発明によれば、アイソレーションプーリ部の側端面に形成した円弧状の長孔を覆うカバーを設けたため、この長孔からプーリ部の内部にダスト等の進入を防止することができ、ジャーナルベアリングの耐久性の低下を招くことはない。
請求項2の発明によれば、長孔を覆うカバーと第2の弾性体を同時に加硫形成するため、上記の効果に加えて、製造コストの上昇を可及的に抑えることができる。
請求項3の発明によれば、長孔を覆うカバーの一部と第2の弾性体の一部が長孔を介して一体化されているため、前記カバーの剥がれを防止することもできる。
【図面の簡単な説明】
【図1】本発明の一実施の形態に係るアイソレーション・ダンパプーリの一部断面図である。
【図2】図1に示すアイソレーション・ダンパプーリの側面図である。
【図3】従来のアイソレーション・ダンパプーリの一部断面図である。
【図4】図3に示すアイソレーション・ダンパプーリの側面図である。
【符号の説明】
10 … 捩りダンパ部
11 … センターハブ(第1の支持体)
12 … 慣性マス
13 … 弾性体(第1の弾性体)
14 … ストッパ
20 … アイソレーションプーリ部
21 … 支持部材(第2の支持体)
22 … プーリ部
23 … 弾性体(第2の弾性体)
24 … プーリ溝
25 … 長孔
60 … カバー
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is mounted on a crankshaft of an internal combustion engine such as an automobile, reduces vibration generated in the crankshaft, and transmits a smooth rotation without transmitting rotation fluctuation of the crankshaft by a pulley for driving an auxiliary machine. The present invention relates to an isolation damper pulley having a function capable of performing the following operations.
[0002]
[Prior art]
FIG. 3 is a partial sectional view of a conventional isolation damper pulley, and FIG. 4 is a side view of the same isolation damper pulley.
As shown in FIGS. 3 and 4, the isolation damper pulley includes a torsional damper unit 10 for absorbing vibration of a crankshaft and an isolation pulley unit 20 having a pulley for driving auxiliary equipment.
The torsional damper unit 10 includes a center hub 11, an inertial mass 12, and an elastic body 13.
[0003]
The center hub 11 is provided on a boss (not shown) mounted on a crankshaft (not shown) of the internal combustion engine, a connecting portion 11A extending radially from the boss, and a peripheral portion of the connecting portion 11A. A stopper 14 that projects axially beyond the end face of the inertial mass 12 and that is inserted into an arc-shaped elongated hole described later is provided at the tip of the hub 11B. Is formed.
The inertial mass 12 has a cylindrical shape having a small-diameter portion 12A and a large-diameter portion 12B, and is formed of vulcanized rubber between the inertial mass 12 and the hub portion 11B of the center hub 11 to reduce vibration of the crankshaft. An annular elastic body 13 to be absorbed is mounted.
[0004]
On the other hand, the isolation pulley section 20 includes a support member 21, a pulley section 22, and an elastic body 23.
The support member 21 has a ring shape having a flange 21A, and is arranged coaxially with the crankshaft of the internal combustion engine.
The pulley portion 22 has a cylindrical shape having a cylindrical portion 22A and a lid portion 22B, and a pulley groove 24 around which an accessory driving belt (not shown) is looped is formed on the cylindrical surface 22A. The lid 22B is formed with two arc-shaped long holes 25 into which the stopper 14 is inserted. Between the lid 22B of the pulley 22 and the flange 21A of the support member 21, vulcanized rubber is provided. And an annular elastic body 23 that receives a torsional deformation between the support member 21 and the pulley portion 22 to absorb a torque fluctuation of the crankshaft is mounted.
[0005]
In FIG. 3, reference numeral 30 denotes a mounting stopper. The mounting stopper 30 has a cylindrical shape having a flange 30A, and is integrated with the center hub 11 and the support member 21 by welding.
Reference numeral 40 denotes a journal bearing. The journal bearing 40 is mounted between the outer peripheral surface of the small diameter portion 12A of the inertial mass 12 and the inner peripheral surface of the cylindrical portion 22A of the pulley portion 22. Reference numeral 50 denotes a thrust bearing. The thrust bearing 50 is mounted between the surface of the lid 22B of the pulley 22 and the back of the flange 30A of the mounting stopper 30 (for example, see Patent Document 1).
[0006]
[Patent Document 1]
Registered Utility Model No. 2605662 (Page 2, Page 3, FIG. 1, FIG. 2)
[0007]
[Problems to be solved by the invention]
However, in the conventional isolation / damper pulley described above, a malfunction occurs in an auxiliary device driven by the belt wound around the pulley groove, and even if an excessive torque is applied to the pulley portion via the belt, the length of the auxiliary damper pulley becomes long. Since the end of the hole contacts the stopper and rotates the pulley synchronously with the torsion damper, damage to the elastic body of the isolation pulley can be prevented. There is a problem that dust and the like easily enter, and therefore, the durability of the journal bearing is reduced.
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an isolation damper pulley in which dust or the like does not enter the inside of the pulley portion from an arc-shaped long hole formed in a lid portion of the pulley portion. The purpose is to provide.
[0008]
[Means for Solving the Problems]
To achieve the above object, an invention according to claim 1 is an isolation damper pulley including a torsional damper portion and an isolation pulley portion, wherein the torsional damper portion is mounted on a crankshaft of an internal combustion engine. 1 support, an inertial mass coaxially disposed outside the first support, and a first elastic body disposed between the first support and the inertial mass. Wherein the isolation pulley portion is provided coaxially with the crankshaft of the internal combustion engine, and coaxially disposed outside the second support. A pulley portion having a pulley groove in the portion, and a second elastic body disposed between the second support and the pulley portion, and protruding in an axial direction from a side end surface of the torsion damper portion. A stopper member is provided, and the stopper member is provided on a side end surface of the isolation pulley portion. Provided with an arc-shaped elongated hole stopper member is inserted, it is characterized in that a cover covering the long hole.
[0009]
A second aspect of the present invention is characterized in that, in the first aspect of the invention, the cover and the second elastic body are simultaneously formed by vulcanization.
Furthermore, the invention of claim 3 is the invention of claim 1 or 2, wherein a part of the cover and a part of the second elastic body are integrated through the elongated hole. I do.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partial cross-sectional view of an isolation damper pulley according to an embodiment of the present invention, and FIG. 2 is a side view of the isolation damper pulley. In FIGS. 1 and 2, the same components as those in FIGS. 3 and 4 are denoted by the same reference numerals, and description thereof will be omitted.
As shown in FIGS. 1 and 2, in the isolation / damper pulley according to the present embodiment, two arc-shaped long holes 25, 25 are formed in the lid 22 </ b> B of the pulley 22. An annular cover 60 is provided to cover from the front side of the elastic member 23. The cover 60 is made of vulcanized rubber having the same composition as the annular elastic body 23. A part of the cover 60 is provided through the long holes 25, 25. And is integrated with a part of the elastic body 23.
Further, the back surface of the cover 60 and the surface of the lid portion 22B of the pulley portion 22 are substantially flush with each other, and the tip of the stopper 14 is submerged in the elongated hole 25. 14 does not interfere mechanically.
In FIG. 1, reference numeral 60A denotes a continuous portion in which a part of the cover 60 and a part of the elastic body 23 are integrated. In FIG. 2, a hatched portion indicates the cover 60.
[0011]
The cover 60 is vulcanized and formed at the same time as the elastic body 23, and is vulcanized and bonded to the surface of the lid 22B. One end of the elastic body 23 is also vulcanized and bonded to the back surface of the lid 22B of the pulley 22. The other end is also vulcanized and bonded to the surface of the flange 21A of the support member 21.
[0012]
According to the isolation damper pulley according to the present embodiment, since the annular cover 60 that covers the two arc-shaped long holes 25, 25 from the front side of the lid 22 </ b> B is provided, the pulley portion is provided from the long holes 25, 25. It is possible to prevent dust or the like from entering the inside of the journal 22, so that the durability of the journal bearing 40 is not reduced.
[0013]
Further, since the cover 60 is provided by vulcanization at the same time as the elastic body 23 of the isolation pulley section 20, an increase in manufacturing cost can be suppressed as much as possible.
Further, centrifugal force and vibration act on the cover 60 due to rotation and vibration of the isolation pulley 20, but the cover 60 is not only vulcanized and adhered to the surface of the lid 22B, but also has a partly elongated hole. Since the cover 60 is integrated with a part of the elastic body 23 via the holes 25, the peeling of the cover 60 can be prevented.
[0014]
In the present embodiment, an annular cover is exemplified as the cover 60. However, the cover does not necessarily have to be annular, and may have an arc shape in accordance with the shape of the long holes 25. Further, the cover 60 does not necessarily need to be formed by vulcanization at the same time as the elastic body 23, and a part of the cover 60 does not have to be integrated with a part of the elastic body 23 through the long holes 25, 25.
[0015]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the cover for covering the arc-shaped long hole formed on the side end surface of the isolation pulley portion is provided, dust or the like enters the inside of the pulley portion from this long hole. Can be prevented, and the durability of the journal bearing is not reduced.
According to the second aspect of the present invention, since the cover for covering the elongated hole and the second elastic body are simultaneously vulcanized, the increase in manufacturing cost can be suppressed as much as possible in addition to the above-mentioned effects.
According to the third aspect of the present invention, since a part of the cover covering the long hole and a part of the second elastic body are integrated via the long hole, peeling of the cover can be prevented.
[Brief description of the drawings]
FIG. 1 is a partial sectional view of an isolation damper pulley according to an embodiment of the present invention.
FIG. 2 is a side view of the isolation damper pulley shown in FIG.
FIG. 3 is a partial sectional view of a conventional isolation damper pulley.
FIG. 4 is a side view of the isolation damper pulley shown in FIG.
[Explanation of symbols]
10 torsion damper 11 center hub (first support)
12 ... inertia mass 13 ... elastic body (first elastic body)
14 Stopper 20 Isolation pulley 21 Support member (second support)
22 ... pulley part 23 ... elastic body (second elastic body)
24 ... pulley groove 25 ... long hole 60 ... cover

Claims (3)

捩りダンパ部とアイソレーションプーリ部とを備えたアイソレーション・ダンパプーリであって、
前記捩りダンパ部は、内燃機関のクランク軸に装着される第1の支持体と、この第1の支持体の外方に同軸的に配設された慣性マスと、前記第1の支持体と前記慣性マスとの間に配設された第1の弾性体とを備え、
前記アイソレーションプーリ部は、前記内燃機関のクランク軸に同軸的に配設される第2の支持体と、この第2の支持体の外方に同軸的に配設され、外周部にプーリ溝を有するプーリ部と、前記第2の支持体と前記プーリ部との間に配設された第2の弾性体とを備え、
前記捩りダンパ部の側端面に軸方向に突出するストッパ部材を設け、前記アイソレーションプーリ部の側端面に前記ストッパ部材が挿入される円弧状の長孔を設けるとともに、この長孔を覆うカバーを設けたことを特徴するアイソレーション・ダンパプーリ。
An isolation damper pulley having a torsional damper portion and an isolation pulley portion,
The torsional damper section includes a first support mounted on a crankshaft of an internal combustion engine, an inertial mass disposed coaxially outside the first support, and the first support. A first elastic body disposed between the inertial mass and
The isolation pulley portion is provided coaxially with a crankshaft of the internal combustion engine, and coaxially disposed outside the second support member. And a second elastic body disposed between the second support and the pulley,
A stopper member protruding in the axial direction is provided on a side end surface of the torsion damper portion, and an arc-shaped long hole into which the stopper member is inserted is provided on a side end surface of the isolation pulley portion, and a cover that covers the long hole is provided. An isolation damper pulley characterized by being provided.
前記カバーと前記第2の弾性体は、同時に加硫形成したことを特徴とする請求項1記載のアイソレーション・ダンパプーリ。2. The isolation damper pulley according to claim 1, wherein the cover and the second elastic body are simultaneously vulcanized. 前記カバーの一部と前記第2の弾性体の一部は、前記長孔を介して一体化されていることを特徴とする請求項1または2に記載のアイソレーション・ダンパプーリ。The isolation damper pulley according to claim 1, wherein a part of the cover and a part of the second elastic body are integrated via the elongated hole.
JP2003146996A 2003-04-17 2003-04-17 Isolation damper pulley Expired - Lifetime JP4314561B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007100852A (en) * 2005-10-05 2007-04-19 Nok Corp Torque fluctuation absorption damper
JP2008144827A (en) * 2006-12-08 2008-06-26 Fukoku Co Ltd Pulley with damper
US7850557B2 (en) 2005-05-20 2010-12-14 Jtekt Corporation Torque fluctuation damper pulley
KR20190106287A (en) * 2018-03-08 2019-09-18 현대자동차주식회사 Damper pulley for crankshaft
US11796046B2 (en) 2021-01-08 2023-10-24 American Axle & Manufacturing, Inc. Isolated drive assembly with an isolator assembly and a torque limiter for limiting the transmission of torque through an elastomeric element of the isolator assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7850557B2 (en) 2005-05-20 2010-12-14 Jtekt Corporation Torque fluctuation damper pulley
JP2007100852A (en) * 2005-10-05 2007-04-19 Nok Corp Torque fluctuation absorption damper
JP2008144827A (en) * 2006-12-08 2008-06-26 Fukoku Co Ltd Pulley with damper
KR20190106287A (en) * 2018-03-08 2019-09-18 현대자동차주식회사 Damper pulley for crankshaft
KR102441083B1 (en) * 2018-03-08 2022-09-06 현대자동차주식회사 Damper pulley for crankshaft
US11796046B2 (en) 2021-01-08 2023-10-24 American Axle & Manufacturing, Inc. Isolated drive assembly with an isolator assembly and a torque limiter for limiting the transmission of torque through an elastomeric element of the isolator assembly

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