JP3498465B2 - Flywheel device for internal combustion engine - Google Patents
Flywheel device for internal combustion engineInfo
- Publication number
- JP3498465B2 JP3498465B2 JP00736696A JP736696A JP3498465B2 JP 3498465 B2 JP3498465 B2 JP 3498465B2 JP 00736696 A JP00736696 A JP 00736696A JP 736696 A JP736696 A JP 736696A JP 3498465 B2 JP3498465 B2 JP 3498465B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- mass
- recess
- mounting flange
- flywheel device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、内燃機関の振動低
減を図るフライホイール装置に関し、特に、部品点数を
削減しつつフライホイール装置の疲労強度を向上する技
術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flywheel device for reducing vibration of an internal combustion engine, and more particularly to a technique for improving the fatigue strength of the flywheel device while reducing the number of parts.
【０００２】[0002]
【従来の技術】従来の内燃機関のフライホイール装置と
しては、例えば、図６に示すようなものがある（日産新
型車解説書 １９９２、マーチ Ｂ−１４頁参照）。こ
のフライホイール装置は、曲げ振動低減構造のもので、
マス部１と、取付フランジ部２と、マス部１と取付フラ
ンジ部２相互の曲げ変位を許容するための弾性変形可能
なプレート部３とからなり、前記マス部１は、ボルト４
によってプレート部３に締結され、前記取付フランジ部
２はプレート部３を介してボルト５によってクランクシ
ャフト６端面に締結される。2. Description of the Related Art As a conventional flywheel device for an internal combustion engine, there is, for example, one shown in FIG. 6 (see Nissan New Model Car Manual 1992, March B-14). This flywheel device has a bending vibration reduction structure,
It comprises a mass part 1, a mounting flange part 2, and an elastically deformable plate part 3 for allowing bending displacement between the mass part 1 and the mounting flange part 2, and the mass part 1 comprises a bolt 4
The mounting flange 2 is fastened to the end surface of the crankshaft 6 by the bolt 5 via the plate 3.
【０００３】当該フライホイール装置にあっては、マス
部１とクランクシャフト６は、プレート部３により相互
に曲げ変位を許容されるため、マス部１の切離し効果に
より、内燃機関使用回転域におけるクランクシャフト振
動を低減する効果がある。しかし、このような従来の内
燃機関のフライホイール装置にあっては、マス部１と、
取付フランジ部２と、プレート部３とが別体であり、部
品点数の多い構造となっていたため、組立工数が増加
し、コスト的に不利であるという問題があるため、マス
部１と取付フランジ部２とプレート部３とを一体構造と
するフライホイール装置が考えられた（特願平６−２１
７４６８号参照）。In the flywheel device, since the mass portion 1 and the crankshaft 6 are allowed to be bent and displaced by the plate portion 3, mutual separation of the mass portion 1 results in the crank in the internal combustion engine operating range. It has the effect of reducing shaft vibration. However, in such a conventional flywheel device for an internal combustion engine, the mass portion 1,
Since the mounting flange portion 2 and the plate portion 3 are separate bodies and have a structure with a large number of parts, there is a problem that the number of assembling steps is increased and the cost is disadvantageous. A flywheel device in which the portion 2 and the plate portion 3 are integrated has been considered (Japanese Patent Application No. 6-21).
7468).
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、マス部
１と取付フランジ部２を単純にプレート部３で接続する
従来の構造では、プレート部３の半径方向の寸法を大き
く取ることが困難であるため、プレート部３の曲げ変位
を許容すべく剛性を低くしようとすると、この部分の強
度が低下しすぎてしまうという問題があり、必要とする
プレート部３の剛性を得ることが困難であった。However, in the conventional structure in which the mass portion 1 and the mounting flange portion 2 are simply connected by the plate portion 3, it is difficult to increase the radial dimension of the plate portion 3. However, if the rigidity is reduced to allow the bending displacement of the plate portion 3, there is a problem that the strength of this portion is excessively reduced, and it is difficult to obtain the required rigidity of the plate portion 3.
【０００５】そのため、図７に示すように、マス部１と
プレート部３とからなる回転中心方向のみに開口したキ
ャビティ（くぼみ）７を有し、プレート部３が半径方向
に大きな寸法を持ったプレートとなることで低剛性かつ
高強度となるように、中子を用いた鋳造によって一体成
型されたフライホイール装置が案出された（特願平７−
１３３８９７号参照）。Therefore, as shown in FIG. 7, there is a cavity (recess) 7 formed only by the mass portion 1 and the plate portion 3 in the direction of the center of rotation, and the plate portion 3 has a large dimension in the radial direction. A flywheel device integrally devised by casting using a core was devised so that it becomes a plate with low rigidity and high strength (Japanese Patent Application No. 7-
No. 133897).
【０００６】ところが、このように構成されたフライホ
イール装置であっても、キャビティ７の内面の一部を構
成するプレート部３は、機械加工等により表面の鋳肌を
加工することが困難であるため、疲労強度の低い鋳肌の
まま使用されているのが現状である。そのため、マス部
１と取付フランジ部２とが振動により相対的に変位する
場合に、疲労強度の低いプレート部３のキャビティ構成
面（図のＡ部）に高い応力が発生する可能性が依然存在
していた。However, even with the flywheel device thus constructed, it is difficult to machine the surface of the plate portion 3 forming a part of the inner surface of the cavity 7 by machining or the like. Therefore, it is the current situation that it is used as it is with a low fatigue strength casting surface. Therefore, when the mass portion 1 and the mounting flange portion 2 are relatively displaced by vibration, there is still a possibility that high stress is generated on the cavity constituting surface (A portion in the figure) of the plate portion 3 having low fatigue strength. Was.
【０００７】そこで、本発明は以上のような従来の問題
点に鑑み、部品点数の削減を図りつつ、弾性変形可能な
プレート部のキャビティ構成面に発生する応力を低減
し、疲労強度が向上した内燃機関のフライホイール装置
を提供することを目的とする。In view of the conventional problems as described above, the present invention reduces the stress generated on the cavity forming surface of the elastically deformable plate portion while improving the fatigue strength while reducing the number of parts. An object is to provide a flywheel device for an internal combustion engine.
【０００８】[0008]
【課題を解決するための手段】このため、請求項１記載
の発明は、外周部に位置するマス部と、中央部に位置し
てクランクシャフトのフランジ部への取付部となる取付
フランジ部と、前記マス部と取付フランジ部とを連接す
ると共に、該マス部と取付フランジ部相互の曲げ変位を
許容するための弾性変形可能なプレート部と、を含んで
構成され、前記マス部を前記プレート部と背中合わせの
位置に対面に配設して、該マス部とプレート部の外周端
面部とを連接し、該プレート部の内周端面部と取付フラ
ンジ部の外周端面部とが連接するよう、該マス部と取付
フランジ部とプレート部とを一体成形し、該マス部とプ
レート部の間に回転中心方向にのみ開口するキャビティ
を形成すると共に、前記プレート部におけるマス部より
内周側に位置する前記キャビティ側表面に、回転中心軸
を中心とした環状をなす陥凹部を設けた。Therefore, according to the first aspect of the present invention, there is provided a mass portion located at an outer peripheral portion and a mounting flange portion located at a central portion and serving as a mounting portion to a flange portion of a crankshaft. And an elastically deformable plate portion for connecting the mass portion and the mounting flange portion together and allowing bending displacement between the mass portion and the mounting flange portion. Are arranged facing each other and the back portion, and the mass portion and the outer peripheral end surface portion of the plate portion are connected, so that the inner peripheral end surface portion of the plate portion and the outer peripheral end surface portion of the mounting flange portion are connected. The mass portion, the mounting flange portion, and the plate portion are integrally molded to form a cavity between the mass portion and the plate portion, the cavity opening only in the direction of the center of rotation, and the inner peripheral side of the mass portion of the plate portion is positioned. Do The serial cavity side surface, provided with a recess which forms a centering on the rotation center axis ring.
【０００９】請求項２記載の発明は、前記プレート部と
取付フランジ部との連接部において、該連接部の板厚が
滑らかに変化するように形成し、かつ、前記プレート部
から取付フランジ部に向かって前記連接部の板厚が変化
し始める箇所を含むように、前記陥凹部を形成した。こ
こで、板厚が滑らかに変化するように形成するとは、例
えば、プレート部と取付フランジ部との連接部を所定の
曲率半径を有する曲面、或いは、プレート部及び取付フ
ランジ部に対し緩やかな傾斜を有する平面で形成したも
のをいう。According to a second aspect of the present invention, the connecting portion between the plate portion and the mounting flange portion is formed so that the plate thickness of the connecting portion changes smoothly, and the plate portion is attached to the mounting flange portion. The recessed portion is formed so as to include a portion toward which the plate thickness of the connecting portion starts to change. Here, forming the plate thickness so as to change smoothly means, for example, a connecting portion between the plate portion and the mounting flange portion being a curved surface having a predetermined radius of curvature, or a gentle inclination with respect to the plate portion and the mounting flange portion. Formed by a plane having
【００１０】請求項３記載の発明は、前記陥凹部の深さ
に関し、半径方向の内周部における深さが、半径方向の
外周部における深さ以上になるように該陥凹部を形成し
た。請求項４記載の発明は、前記陥凹部を曲面によって
構成したものにおいて、該陥凹部の断面の凹部曲率半径
に関し、半径方向の内周部における曲率半径が、半径方
向の外周部における曲率半径以下になるように該陥凹部
を形成した。According to a third aspect of the present invention, with respect to the depth of the recess, the recess is formed so that the depth at the inner peripheral portion in the radial direction is equal to or greater than the depth at the outer peripheral portion in the radial direction. According to a fourth aspect of the present invention, in the concave portion formed by a curved surface, the radius of curvature at the inner peripheral portion in the radial direction is less than or equal to the radius of curvature at the outer peripheral portion in the radial direction with respect to the concave portion curvature radius of the cross section of the concave portion. The recess was formed so that
【００１１】 請求項５記載の発明は、外周部に位置す
るマスと弾性変形可能なプレートとを背中合わせに配設
しつつその外周端面部同士を連接して、前記マスとプレ
ートとの間に回転中心方向にのみ開口するキャビティを
形成すると共に、前記キャビティ側のプレート表面に、
該プレート表面の応力集中を低減する手段を施した。According to a fifth aspect of the invention, the mass located on the outer peripheral portion and the elastically deformable plate are arranged back to back.
While connecting the outer peripheral end faces to each other,
A cavity that opens only in the direction of the center of rotation between the
While forming, on the plate surface of the cavity side,
Measures were taken to reduce the stress concentration on the plate surface.
【００１２】[0012]
【発明の効果】以上説明したように、請求項１記載の発
明によれば、キャビティを設けたことにより、プレート
部は半径方向に大きな寸法を持ったプレートとなるた
め、低剛性かつ高強度となり、マス部と取付フランジ部
の曲げ変位を許容するようになる。そのため、フライホ
イール装置に加わるクランク系の曲げ振動は、前記マス
部をプレート部で支持したことによるマス部の切離し効
果によって低減される。そして、マス部と取付フランジ
部とが相対的に変位する結果、プレート部は変形して撓
み応力が発生する。この応力は、プレート部表面に形成
された陥凹部の表面付近に集中するので、疲労強度の低
い鋳肌のまま使用されるプレート部のキャビティ形成面
での発生応力が低減し、フライホイール装置の耐久性が
向上する。As described above, according to the invention described in claim 1, since the plate portion has a large dimension in the radial direction by providing the cavity, it has low rigidity and high strength. , Allows bending displacement of the mass part and the mounting flange part. Therefore, the bending vibration of the crank system applied to the flywheel device is reduced by the effect of separating the mass portion by supporting the mass portion by the plate portion. As a result of the relative displacement between the mass portion and the mounting flange portion, the plate portion is deformed and bending stress is generated. This stress is concentrated near the surface of the recess formed in the surface of the plate portion, so that the stress generated on the cavity forming surface of the plate portion used as a casting surface with low fatigue strength is reduced, The durability is improved.
【００１３】請求項２記載の発明によれば、陥凹部にフ
ライホイール装置に加わるクランク系の曲げ振動による
応力が効率良く集中するので、疲労強度の低い鋳肌のま
ま使用されるプレート部のキャビティ構成面での発生応
力が低減し、フライホイール装置の耐久性がより向上す
る。請求項３及び４に記載の発明によれば、陥凹部の表
面及び近傍で発生する応力のうち、内周部に対する外周
部、即ち、プレート部の鋳肌表面での応力集中度合を低
減することができ、フライホイール装置の耐久性がより
向上する。According to the second aspect of the present invention, the stress due to the bending vibration of the crank system applied to the flywheel device is efficiently concentrated in the recessed portion, so that the cavity of the plate portion which is used as a cast surface with low fatigue strength is used. The stress generated in the structure is reduced, and the durability of the flywheel device is further improved. According to the invention described in claims 3 and 4, among stresses generated on the surface of the recess and in the vicinity thereof, it is possible to reduce the degree of stress concentration on the outer peripheral portion with respect to the inner peripheral portion, that is, on the casting surface of the plate portion. And the durability of the flywheel device is further improved.
【００１４】 請求項５記載の発明によれば、キャビテ
ィを設けたことにより、プレートは半径方向に大きな寸
法を持ったプレートとなるため、低剛性かつ高強度とな
り、曲げ変位を許容するようになる。このため、フライ
ホイール装置に加わるクランク系の曲げ振動は、マスを
プレートで支持したことによるマスの切離し効果によっ
て低減される。しかも、キャビティ側のプレート表面に
は、プレートの変形によってプレート表面に発生する応
力を低減する手段が施されているので、疲労強度の低い
鋳肌のまま使用されるプレートのキャビティ構成面での
発生応力が低減し、フライホイール装置の耐久性が向上
する。以上の各請求項に記載の効果に加え、本発明に係
るフライホイール装置では、プレート部の鋳肌表面を加
工除去して形成するようにしたので、形状寸法の測定が
容易で管理しやすいため、内燃機関のフライホイール装
置の耐久性に対する安全率の確保が容易になる。即ち、
製品の均一化を図ることができる。According to the invention of claim 5, the cavitation
The plate has a large radial dimension.
Since the plate has a law, it has low rigidity and high strength.
Therefore, bending displacement is allowed. Therefore, the bending vibration of the crank system applied to the flywheel device is reduced by the effect of separating the mass by supporting the mass by the plate. Moreover, on the plate surface on the cavity side
Is the reaction generated on the plate surface due to the plate deformation.
Low fatigue strength due to measures to reduce force
In the cavity structure surface of the plate used as it is
The generated stress is reduced and the durability of the flywheel device is improved. In addition to the effects described in each of the above claims, in the flywheel device according to the present invention, since the casting surface of the plate portion is formed by processing and removal, it is easy to manage the shape and dimensions and manage it. , It becomes easy to secure the safety factor for the durability of the flywheel device of the internal combustion engine. That is,
Product uniformity can be achieved.
【００１５】[0015]
【発明の実施の形態】以下、添付された図面を参照して
本発明を詳述する。図１は、請求項１及び５に記載の内
燃機関のフライホイール装置の一実施例を示したもの
で、外周部に位置するマス部１と、中央部に位置してク
ランクシャフト６への取付部となる取付フランジ部２
と、前記マス部１と取付フランジ部２とを連接し、該取
付フランジ部２の連接部に曲げ変位を許容する弾性変形
可能なプレート部３と、を含んで構成される。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a flywheel device for an internal combustion engine according to claims 1 and 5, wherein a mass portion 1 located at an outer peripheral portion and an attachment to a crankshaft 6 located at a central portion are mounted. Mounting flange 2
And the elastically deformable plate portion 3 that connects the mass portion 1 and the mounting flange portion 2 to each other and allows the bending displacement at the connecting portion of the mounting flange portion 2.
【００１６】前記マス部１は、プレート部３と背中合わ
せの位置に対面に配設され、該マス部１とプレート部３
の外周端面部とを連接し、該プレート部３の内周端面部
に取付フランジ部２の外周端面部が連接するように、該
マス部１と取付フランジ部２とプレート部３とは一体的
に形成される。ここで、前記マス部１とプレート部３と
の間には、回転中心方向のみに開口し、かつ、全周一様
に形成されたキャビティ（くぼみ）７が設けられる。The mass portion 1 is disposed face-to-face with the plate portion 3 so as to face each other, and the mass portion 1 and the plate portion 3 are arranged.
The mass portion 1, the mounting flange portion 2, and the plate portion 3 are integrally formed so that the outer peripheral end surface portion of the plate portion 3 is connected to the outer peripheral end surface portion of the plate portion 3 and the outer peripheral end surface portion of the mounting flange portion 2 is connected to the inner peripheral end surface portion of the plate portion 3. Is formed. Here, between the mass portion 1 and the plate portion 3, there is provided a cavity (recess) 7 that is open only in the direction of the center of rotation and is formed uniformly over the entire circumference.
【００１７】また、プレート部３において、マス部１よ
り内周側に位置するキャビティ側表面Ｂには、プレート
部３の鋳肌表面を全周に渡り加工削除することで、回転
中心軸を中心とした環状をなす陥凹部８（請求項５にお
ける応力集中を低減する手段）が形成される。上記の如
く構成されたフライホイール装置は、前記取付フランジ
部２をボルト５によって内燃機関のクランクシャフト６
端面に締結される。On the cavity side surface B of the plate portion 3 located on the inner peripheral side of the mass portion 1, the casting surface of the plate portion 3 is machined and removed over the entire circumference so that the center axis of rotation is centered. The annular recess 8 (means for reducing stress concentration in claim 5) is formed. In the flywheel device configured as described above, the mounting flange portion 2 is attached to the crankshaft 6 of the internal combustion engine by the bolt 5.
It is fastened to the end face.
【００１８】次に、かかる構成のフライホイール装置の
作用について説明する。前記キャビティ７により、プレ
ート部３は半径方向に大きな寸法を持ったプレートとな
るため、低剛性かつ高強度となり、マス部１と取付フラ
ンジ部２の曲げ変位を許容するようになる。そのため、
フライホイール装置に加わるクランク系の曲げ振動は、
前記マス部１をプレート部３で支持したことによるマス
部１の切離し効果によって低減される。Next, the operation of the flywheel device having such a structure will be described. Since the plate portion 3 becomes a plate having a large radial dimension due to the cavity 7, the plate portion 3 has low rigidity and high strength, and bending displacement of the mass portion 1 and the mounting flange portion 2 is allowed. for that reason,
The bending vibration of the crank system applied to the flywheel device is
It is reduced by the effect of separating the mass portion 1 by supporting the mass portion 1 by the plate portion 3.
【００１９】また、マス部１の図示しない変速機側の端
面に設けられたクラッチ摺動面１ａにおいて、クラッチ
が摺動する際、有害となるゴミ等の異物に対して、キャ
ビティ７が異物溜め部となり得る。このようにマス部１
と取付フランジ部２とが相対的に変位する結果、プレー
ト部３は変形して撓み、応力が発生する。この応力は、
プレート部３表面に形成された陥凹部８の表面付近Ｃに
集中するので、疲労強度の低い鋳肌のまま使用されるプ
レート部３のキャビティ構成面での発生応力が低減し、
フライホイール装置の耐久性が向上する。In addition, in the clutch sliding surface 1a provided on the end face of the mass portion 1 on the transmission side (not shown), the cavity 7 holds the foreign matter such as dust that is harmful when the clutch slides. Can be a part. In this way, the mass section 1
As a result of relative displacement between the mounting flange portion 2 and the mounting flange portion 2, the plate portion 3 is deformed and bent, and stress is generated. This stress is
Since it concentrates on the vicinity C of the surface of the recess 8 formed on the surface of the plate portion 3, the stress generated on the cavity forming surface of the plate portion 3 which is used as it is with a low fatigue strength casting surface is reduced,
The durability of the flywheel device is improved.
【００２０】図２及び図３は、請求項２記載の内燃機関
のフライホイール装置の一実施例を示したもので、前記
マス部１の内径の大きさに関わらず、効率良くプレート
部３に形成された陥凹部８に応力を集中させるための、
陥凹部８の形成位置について言及したものである。図２
に示すフライホイール装置は、キャビティ７側における
取付フランジ部２とプレート部３との連接部を、略一定
の曲率半径Ｒ1 を有する曲面で構成したものである。こ
の場合には、プレート部３の板厚が徐々に増加し始める
Ｄ1 点を含むように、陥凹部８を形成する。2 and 3 show an embodiment of a flywheel device for an internal combustion engine according to a second aspect of the present invention, in which the plate portion 3 is efficiently provided regardless of the inner diameter of the mass portion 1. In order to concentrate stress on the formed recess 8,
It refers to the formation position of the recess 8. Figure 2
In the flywheel device shown in (1), the connecting portion of the mounting flange portion 2 and the plate portion 3 on the cavity 7 side is formed by a curved surface having a substantially constant radius of curvature R 1 . In this case, the recess 8 is formed so as to include the point D1 at which the plate thickness of the plate portion 3 starts to gradually increase.
【００２１】また、図３に示すフライホイール装置は、
キャビティ７側における取付フランジ部２とプレート部
３との連接部を、取付フランジ部２及びプレート部３に
対し緩やかな傾斜を有する平面で構成したものである。
この場合にも、図２に示すフライホイール装置と同様
に、プレート部３の板厚が徐々に増加し始めるＤ2 点を
含むように、陥凹部８を形成する。Further, the flywheel device shown in FIG.
The connecting portion between the mounting flange portion 2 and the plate portion 3 on the side of the cavity 7 is configured by a plane having a gentle inclination with respect to the mounting flange portion 2 and the plate portion 3.
Also in this case, similarly to the flywheel device shown in FIG. 2, the recess 8 is formed so as to include the point D2 at which the plate thickness of the plate portion 3 starts to gradually increase.
【００２２】このようにすれば、かかる陥凹部８にフラ
イホイール装置に加わるクランク系の曲げ振動による応
力が効率良く集中し、疲労強度の低い鋳肌のまま使用さ
れるプレート部３のキャビティ構成面での発生応力が低
減し、フライホイール装置の耐久性がより向上する。次
に、図４及び図５は、請求項３及び４記載の内燃機関の
フライホイール装置の一実施例を示したもので、陥凹部
８からプレート部３への移行部の応力集中を低減するた
めの、陥凹部８の深さ及び形状について言及したもので
ある。In this way, the stress due to the bending vibration of the crank system applied to the flywheel device is efficiently concentrated in the recessed portion 8, and the cavity forming surface of the plate portion 3 which is used as it is with a low fatigue strength casting surface. The stress generated in the flywheel is reduced, and the durability of the flywheel device is further improved. Next, FIGS. 4 and 5 show an embodiment of a flywheel device for an internal combustion engine according to claims 3 and 4, and reduce stress concentration at the transition portion from the recessed portion 8 to the plate portion 3. The depth and shape of the recessed portion 8 for the purpose are described.
【００２３】図４に示すフライホイール装置の陥凹部８
において、外周部の深さｈ1 が内周部の深さｈ2 以下に
なるように（ｈ1 ≦ｈ2 ）陥凹部８を形成する。或い
は、陥凹部８の断面を曲面によって構成した場合には、
外周部の曲率半径Ｒ1 が内周部の曲率半径Ｒ2 以上にな
るように（Ｒ1 ≧Ｒ2 ）陥凹部８を形成するようにして
もよい。即ち、陥凹部８の深さを、フライホイール装置
の外周に向かうに従って、浅くなるように形成する。The recess 8 of the flywheel device shown in FIG.
In, the recess 8 is formed such that the depth h1 of the outer peripheral portion is equal to or less than the depth h2 of the inner peripheral portion (h1≤h2). Alternatively, when the recess 8 has a curved cross section,
The recess 8 may be formed so that the radius of curvature R 1 of the outer peripheral portion is equal to or larger than the radius of curvature R 2 of the inner peripheral portion (R 1 ≧ R 2 ). That is, the recess 8 is formed so that the depth thereof becomes shallower toward the outer circumference of the flywheel device.
【００２４】このようにすれば、かかる陥凹部８の表面
及び近傍で発生する応力のうち、内周部に対する外周
部、即ち、プレート部３の鋳肌表面Ｅでの応力集中度合
を低減することができる。また、図５に示すフライホイ
ール装置の陥凹部８は、３つの陥凹部８ａ〜８ｃから構
成されている。この場合には、陥凹部８ａ〜８ｃの深さ
及び曲率半径を外周から内周に向かって、夫々、ｈ1 、
ｈ2 、ｈ3 及びＲ1 、Ｒ2 、Ｒ3 とすると、ｈ1 ≦ｈ2
≦ｈ3 、或いは、Ｒ1 ≧Ｒ2 ≧Ｒ3 となるように陥凹部
８ａ〜８ｃを形成する。即ち、陥凹部８ａ〜８ｃの深さ
を、フライホイール装置の外周に向かうに従って、浅く
なるように形成する。なお、陥凹部８の数は、本実施例
に示すように３つに限らず、任意の数としてもよい。By doing so, it is possible to reduce the degree of stress concentration on the outer peripheral portion with respect to the inner peripheral portion, that is, on the casting surface E of the plate portion 3 among the stresses generated on the surface of the concave portion 8 and in the vicinity thereof. You can Further, the recess 8 of the flywheel device shown in FIG. 5 is composed of three recesses 8a to 8c. In this case, the depths and radii of curvature of the recesses 8a to 8c are increased from the outer circumference to the inner circumference by h1, respectively.
h2, h3 and When R 1, R 2, R 3 , h1 ≦ h2
≦ h3, or to form a recess 8a~8c such that R 1 ≧ R 2 ≧ R 3 . That is, the recesses 8a to 8c are formed so that the depth thereof becomes shallower toward the outer circumference of the flywheel device. The number of recesses 8 is not limited to three as shown in this embodiment, but may be any number.
【００２５】このようにすれば、図４に示すフライホイ
ール装置と同様に、プレート部３の鋳肌表面Ｅでの応力
集中度合を低減することができる。以上説明したフライ
ホイール装置によれば、クランク系の曲げ振動によりマ
ス部と取付フランジ部とが相対的に変位する場合に、鋳
肌面であるプレート部のキャビティの構成面に発生する
応力が低減するという効果に併せて、以下に述べる効果
もある。By doing so, the degree of stress concentration on the casting surface E of the plate portion 3 can be reduced as in the flywheel device shown in FIG. According to the flywheel device described above, when the mass portion and the mounting flange portion are relatively displaced by bending vibration of the crank system, the stress generated on the component surface of the cavity of the plate portion, which is the casting surface, is reduced. In addition to the effect of doing so, there are also the effects described below.
【００２６】即ち、内燃機関のフライホイール装置の耐
久性に対する安全率を確保するためには、プレート部に
形成した陥凹部での応力集中を鑑み、生産時の陥凹部形
状を管理する必要がある。本発明に係るフライホイール
装置では、プレート部の鋳肌表面を加工除去して形成す
るため、形状寸法の測定が容易で管理しやすく、製品の
均一化が図れる。That is, in order to secure the safety factor for the durability of the flywheel device of the internal combustion engine, it is necessary to control the shape of the recess at the time of production in consideration of the stress concentration in the recess formed in the plate portion. . In the flywheel device according to the present invention, since the surface of the casting surface of the plate portion is processed and removed, the shape and dimension can be easily measured and managed, and the product can be made uniform.
【図１】 請求項１及び５に記載のフライホイール装置
の一実施例を示す断面図FIG. 1 is a cross-sectional view showing an embodiment of a flywheel device according to claims 1 and 5.
【図２】 請求項２記載のフライホイール装置の一実施
例を示す断面図FIG. 2 is a sectional view showing an embodiment of the flywheel device according to claim 2;
【図３】 同上の他の実施例を示す断面図FIG. 3 is a sectional view showing another embodiment of the above.
【図４】 請求項３及び４に記載のフライホイール装置
の一実施例を示す断面図FIG. 4 is a sectional view showing an embodiment of a flywheel device according to claims 3 and 4.
【図５】 同上の他の実施例を示す断面図FIG. 5 is a sectional view showing another embodiment of the above.
【図６】 従来のフライホイール装置の一例の断面図FIG. 6 is a sectional view of an example of a conventional flywheel device.
【図７】 同上のフライホイール装置を改良した一例の
断面図FIG. 7 is a sectional view of an example of an improved flywheel device of the same.
１ マス部 ２ 取付フランジ部 ３ プレート部 ７ キャビティ ８ 陥凹部 1 mass section 2 Mounting flange 3 Plate part 7 cavities 8 recess
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F16F 15/30 F16F 15/26 F16F 15/121 F02B 77/00 F03G 3/08 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) F16F 15/30 F16F 15/26 F16F 15/121 F02B 77/00 F03G 3/08
Claims (5)
してクランクシャフトのフランジ部への取付部となる取
付フランジ部と、前記マス部と取付フランジ部とを連接
すると共に、該マス部と取付フランジ部相互の曲げ変位
を許容するための弾性変形可能なプレート部と、を含ん
で構成され、前記マス部を前記プレート部と背中合わせ
の位置に対面に配設して、該マス部とプレート部の外周
端面部とを連接し、該プレート部の内周端面部と取付フ
ランジ部の外周端面部とが連接するよう、該マス部と取
付フランジ部とプレート部とを一体成形し、該マス部と
プレート部の間に回転中心方向にのみ開口するキャビテ
ィを形成すると共に、前記プレート部におけるマス部よ
り内周側に位置する前記キャビティ側表面に、回転中心
軸を中心とした環状をなす陥凹部を設けたことを特徴と
する内燃機関のフライホイール装置。1. A mass portion located on an outer peripheral portion, a mounting flange portion located at a central portion and serving as a mounting portion to a flange portion of a crankshaft, and connecting the mass portion and the mounting flange portion together. An elastically deformable plate portion for permitting bending displacement between the mass portion and the mounting flange portion, and the mass portion is disposed face-to-face with the plate portion so as to face the mass portion. Portion and the outer peripheral end surface portion of the plate portion are connected, and the mass portion, the mounting flange portion, and the plate portion are integrally molded so that the inner peripheral end surface portion of the plate portion and the outer peripheral end surface portion of the mounting flange portion are connected. A cavity formed only between the mass portion and the plate portion in the direction of the center of rotation is formed, and a ring centered on the rotation center axis is formed on the cavity side surface of the plate portion located on the inner peripheral side of the mass portion. Flywheel device for internal combustion engine, characterized in that a recess forming a.
部において、 該連接部の板厚が滑らかに変化するように形成し、か
つ、前記プレート部から取付フランジ部に向かって前記
連接部の板厚が変化し始める箇所を含むように、前記陥
凹部を形成したことを特徴とする請求項１記載の内燃機
関のフライホイール装置。2. The connecting portion between the plate portion and the mounting flange portion is formed so that the plate thickness of the connecting portion changes smoothly, and the connecting portion is formed from the plate portion toward the mounting flange portion. The flywheel device for an internal combustion engine according to claim 1, wherein the recess is formed so as to include a portion where the plate thickness starts to change.
おける深さ以上になるように該陥凹部が形成されたこと
を特徴とする請求項１又は２に記載の内燃機関のフライ
ホイール装置。3. With regard to the depth of the recess, the recess is formed so that the depth at the inner peripheral portion in the radial direction is equal to or greater than the depth at the outer peripheral portion in the radial direction. Item 3. A flywheel device for an internal combustion engine according to item 1 or 2.
おいて、 該陥凹部の断面の凹部曲率半径に関し、 半径方向の内周部における曲率半径が、半径方向の外周
部における曲率半径以下になるように該陥凹部が形成さ
れたことを特徴とする請求項１又は２に記載の内燃機関
のフライホイール装置。4. In the case where the recess is formed by a curved surface, with respect to the radius of curvature of the recess of the cross section of the recess, the radius of curvature at the inner peripheral portion in the radial direction is equal to or less than the radius of curvature at the outer peripheral portion in the radial direction. The flywheel device for an internal combustion engine according to claim 1 or 2, wherein the recess is formed in the recess.
レートとを背中合わせに配設しつつその外周端面部同士
を連接して、前記マスとプレートとの間に回転中心方向
にのみ開口するキャビティを形成すると共に、前記キャ
ビティ側のプレート表面に、該プレート表面の応力集中
を低減する手段を施したことを特徴とする内燃機関のフ
ライホイール装置。5. A mass located on the outer peripheral portion and a resiliently deformable plate.
While the rate and the back are arranged back to back
And connect it to the center of rotation between the mass and the plate.
A cavity that opens only in the
A flywheel device for an internal combustion engine , wherein means for reducing stress concentration on the plate surface on the vity side is provided.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00736696A JP3498465B2 (en) | 1996-01-19 | 1996-01-19 | Flywheel device for internal combustion engine |
| GB9610855A GB2301650B (en) | 1995-05-31 | 1996-05-23 | Integral cast flywheel and method of producing the same |
| US08/654,963 US5768949A (en) | 1995-05-31 | 1996-05-29 | Integral cast flywheel and method of producing the same |
| KR1019960018714A KR0169218B1 (en) | 1995-05-31 | 1996-05-30 | Integral cast flywheel and method of production thereof |
| DE19622043A DE19622043C2 (en) | 1995-05-31 | 1996-05-31 | Integral cast flywheel and method of manufacturing an integral flywheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00736696A JP3498465B2 (en) | 1996-01-19 | 1996-01-19 | Flywheel device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09196123A JPH09196123A (en) | 1997-07-29 |
| JP3498465B2 true JP3498465B2 (en) | 2004-02-16 |
Family
ID=11663981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00736696A Expired - Fee Related JP3498465B2 (en) | 1995-05-31 | 1996-01-19 | Flywheel device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3498465B2 (en) |
-
1996
- 1996-01-19 JP JP00736696A patent/JP3498465B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09196123A (en) | 1997-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3356877B2 (en) | Manufacturing method of split bearing | |
| EP1267080A1 (en) | Water pump | |
| JP4178592B2 (en) | Casting method of casting having insert member | |
| JP3498465B2 (en) | Flywheel device for internal combustion engine | |
| EP0894952B1 (en) | Air guide casing for air-cooled engines | |
| US5373391A (en) | Polygon mirror with embedded yoke | |
| JP3189684B2 (en) | Piston casting method | |
| EP3277983B1 (en) | Torsional vibration damper spoke design | |
| EP0061145A1 (en) | Pulley for cogged belt and method for producing same | |
| JP3016900B2 (en) | Manufacturing method of engine cylinder block | |
| US4482304A (en) | Compressor of a type incorporated in an exhaust gas turbocharger | |
| JP2003262254A (en) | Flexible fly wheel for clutch, in particular, clutch for automobile | |
| US5768949A (en) | Integral cast flywheel and method of producing the same | |
| JP3498425B2 (en) | Flywheel device for internal combustion engine and method of manufacturing the same | |
| JPH0343083B2 (en) | ||
| CN212272804U (en) | Assembled bent axle | |
| JPH0526244Y2 (en) | ||
| JP3126842B2 (en) | Magnet generator and method of manufacturing the same | |
| JPH0537062Y2 (en) | ||
| JP3927674B2 (en) | Manufacturing method of rubber damper | |
| JP3645016B2 (en) | Suspension bush | |
| JPS6311283Y2 (en) | ||
| JP2002293102A (en) | Aluminum wheel for automobile and manufacturing method thereof | |
| JPH06109097A (en) | Drive plate assembly body for automatic transmission | |
| JP3821182B2 (en) | Rubber damper device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081205 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091205 Year of fee payment: 6 |
|
| LAPS | Cancellation because of no payment of annual fees |