JP2008025799A

JP2008025799A - Dynamic damper and hollow propeller shaft with it

Info

Publication number: JP2008025799A
Application number: JP2006202112A
Authority: JP
Inventors: Masafumi Furuya; 雅史古屋
Original assignee: Synztec Co Ltd
Current assignee: Synztec Co Ltd
Priority date: 2006-07-25
Filing date: 2006-07-25
Publication date: 2008-02-07

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dynamic damper having high spring characteristics perpendicular to the axis regardless of the diameter size of a hollow propeller shaft, providing resonance characteristics from a low-frequency region to a high-frequency region, reducing costs by reducing metal portions, and by non-adhesive bonding and easily fitted, and a hollow propeller shaft with the damper. <P>SOLUTION: The dynamic damper and the hollow propeller shaft with it comprises an easily fitted member fixed inside a hollow shaft which is situated in both sides of damper mass which is freely fitted and an integrally connected member which connects the damper mass and easily fitted member and the integrally connected member connects elastically the damper mass in the easily fitted member and in the same axis and at the same time, the integrally connected member comprises a slope way portion slanted on the same axis and connecting portions fastening each other. By this way, roles of the easily fitted member and the integrally connected member are divided and can be non-bonding and, when the mass and rigidity of the integrally connecting member are adjusted, high shaft perpendicular spring characteristics are maintained and resonance characteristics can be obtained by wide range of frequency and products easily made at economical cost are obtained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、自動車走行時の静粛性向上を図るための、ダイナミックダンパー及びそれを装着した中空プロペラシャフトに関するものであって、より詳しくは、中空シャフト内に遊嵌するダンパーマスと、このダンパーマス両側に位置して中空シャフト内に圧縮により固定する装着部材と、ダンパーマスと両側の装着部材とを連結する一体的連結部材とからなることで、低コスト且つ自動車走行特性により適切に対応できるようにしたダイナミックダンパー及びそれを装着した中空プロペラシャフトに関する。 The present invention relates to a dynamic damper and a hollow propeller shaft equipped with the dynamic damper for improving the quietness of a vehicle when traveling, and more specifically, a damper mass loosely fitted in the hollow shaft, and the damper mass Since it is composed of a mounting member that is positioned on both sides and is fixed to the hollow shaft by compression, and an integral connecting member that connects the damper mass and the mounting members on both sides, it can be appropriately handled at low cost and in accordance with vehicle running characteristics. The present invention relates to a dynamic damper and a hollow propeller shaft on which the dynamic damper is mounted.

ダイナミックダンパーは、自動車の駆動力伝達に供する中空プロペラシャフト内に装着して、車体の振動を防止し自動車走行時の静粛性の向上を図り、加えて、中空プロペラシャフト自身の振動による金属疲労に随伴する強度低下を防止し、その耐久性を高めるためのものである。この中空プロペラシャフト用のダイナミックダンパーは、通常、図１７に示すように、外周面にラバー５３を貼り付けたアウターパイプ５０と、このアウターパイプ５０の軸芯に配置したダンパーマス５１と、このダンパーマス５１とアウターパイプ５０との間に介在して両者を弾性的に連結するマウントラバー５２と、を少なくとも有している。このダイナミックダンパーは、中空プロペラシャフト６０に内設し、中空プロペラシャフト６０の回転時に発生する振動を吸収し防振することで、中空プロペラシャフト６０の振動を解消しようとするものである。 The dynamic damper is installed in the hollow propeller shaft that is used to transmit the driving force of the car, preventing vibration of the car body and improving the quietness when driving the car, and in addition to metal fatigue caused by vibration of the hollow propeller shaft itself. This is for preventing the accompanying strength reduction and enhancing its durability. As shown in FIG. 17, the dynamic damper for the hollow propeller shaft is generally composed of an outer pipe 50 having a rubber 53 attached to the outer peripheral surface, a damper mass 51 disposed on the axial center of the outer pipe 50, and the damper. It has at least a mount rubber 52 that is interposed between the mass 51 and the outer pipe 50 and elastically connects the two. This dynamic damper is installed in the hollow propeller shaft 60 and absorbs vibration generated when the hollow propeller shaft 60 rotates to prevent vibration, thereby eliminating vibration of the hollow propeller shaft 60.

上記のダイナミックダンパーは、通常、金型を加熱して所定の温度にし、予めダンパーマス５１やアウターパイプ５０を表面処理、化成処理し、さらに接着剤を塗布した後、金型に挿入しゴム素材を射出して加硫成形することにより、得られる。したがって、このダイナミックダンパーは、ダンパーマス５１及びアウターパイプ５０が、ラバー５３及びマウントラバー５２と一体化するメリットがあるものの、これを作製するのに長い時間がかかり、生産性が低く、コスト高となりやすい。このような状況に対処するものとして、以下のような技術が知られている。
特開２００４−１０８４２６号公報特開２００４−１５６６７４号公報特開２００２−２３５８０２号公報特開２００２−２３５８０３号公報特開２００５−４８９３６号公報 The above-described dynamic damper is usually a rubber material that is heated to a predetermined temperature by heating the mold, preliminarily surface treatment and chemical conversion treatment of the damper mass 51 and outer pipe 50, and further applying an adhesive, and then inserting into the mold. Can be obtained by injecting and vulcanization molding. Therefore, although this dynamic damper has the merit that the damper mass 51 and the outer pipe 50 are integrated with the rubber 53 and the mount rubber 52, it takes a long time to produce this, and the productivity is low and the cost is high. Cheap. The following techniques are known to deal with such a situation.
JP 2004-108426 A JP 2004-156675 A JP 2002-235802 A JP 2002-235803 A JP 2005-48936 A

特許文献１のダイナミックダンパーは、図１８に示すように、シャフト６１の外周に設けるもので、ダンパーマス５１ａと、このダンパーマス５１ａ及びシャフト６１間に圧入する両側のマウントラバー５２ａとからなるものである。 As shown in FIG. 18, the dynamic damper disclosed in Patent Document 1 is provided on the outer periphery of the shaft 61, and includes a damper mass 51 a and mount rubbers 52 a on both sides press-fitted between the damper mass 51 a and the shaft 61. is there.

特許文献２のダイナミックダンパーは、図１９に示すように、外周面に径方向に設けた２本の環状溝６２を有するダンパーマス５１ｂと、２本の環状溝６２に圧入し固定保持されるリング状のマウントラバー５２ｂとからなり、中空プロペラシャフト６０に内設するものである。 As shown in FIG. 19, the dynamic damper disclosed in Patent Document 2 includes a damper mass 51b having two annular grooves 62 provided in the radial direction on the outer peripheral surface, and a ring that is press-fitted into the two annular grooves 62 and fixedly held. And is mounted in the hollow propeller shaft 60.

特許文献３のダイナミックダンパーは、図２０に示すように、取付パイプ５４と、この取付パイプ５４の軸心部に配置されたダンパーマス５１ｃと、これら取付パイプ５４とダンパーマス５１ｃとの間に配置されて弾性的に連結するマウントラバー５２ｃとからなり
、マウントラバー５２ｃの外側にアウターパイプ５０ｃを配置し、このアウターパイプ５０ｃを絞り加工した後、取付パイプ５４の中にダンパーマス５１ｃを圧入してなるものである。 As shown in FIG. 20, the dynamic damper disclosed in Patent Document 3 is provided with a mounting pipe 54, a damper mass 51 c disposed at the axial center of the mounting pipe 54, and between the mounting pipe 54 and the damper mass 51 c. The outer pipe 50c is disposed outside the mount rubber 52c, and after drawing the outer pipe 50c, the damper mass 51c is press-fitted into the mounting pipe 54. It will be.

特許文献４のダイナミックダンパーは、図２１に示すように、取付パイプ５４と、この取付パイプ５４の軸心部に配置されたダンパーマス５１ｃと、これら取付パイプ５４とダンパーマス５１ｃとの間に配置されて弾性的に連結するマウントラバー５２ｃとからなり
、取付パイプ５４を樹脂製とすると共に、マウントラバー５２ｃの内側に配置された樹脂製のインナーパイプ５５と、マウントラバー５２ｃの外側に配置された樹脂製のアウターパイプ５６とを具備し、インナーパイプ５５の中にダンパーマス５１ｃを圧入してなるものである。 As shown in FIG. 21, the dynamic damper disclosed in Patent Document 4 is provided with an attachment pipe 54, a damper mass 51c arranged at the axial center of the attachment pipe 54, and between the attachment pipe 54 and the damper mass 51c. The mounting pipe 52 is made of resin, and the mounting pipe 54 is made of resin. The resin inner pipe 55 is arranged inside the mount rubber 52c, and is arranged outside the mount rubber 52c. A resin outer pipe 56 is provided, and a damper mass 51 c is press-fitted into the inner pipe 55.

特許文献５のダイナミックダンパーは、図２２に示すように、筒状に形成されて外周面に径方向に凹溝５７を有するマウントラバー５２ｄと、この凹溝５７に非接着で装着されたリング状のダンパーマス５１ｄと、マウントラバー５２ｄの内孔７０に非接着で挿入配置された筒状部７１とこの筒状部７１の一端から径方向外方に向かってダンパーマス５１ｄの内周面より外側に延出するフランジ部７２とを有し、筒状部７１の内孔７１ａに挿入された取付ボルト７３を緊締することにより、振動体７４の取付面とフランジ部７２とでマウントラバー５２ｄを挟持する状態に取り付けられる取付部材７５と、から構成している。 As shown in FIG. 22, the dynamic damper of Patent Document 5 is formed in a cylindrical shape and has a mounting rubber 52 d having a groove 57 in the radial direction on the outer peripheral surface, and a ring shape attached to the groove 57 in a non-adhesive manner. Damper mass 51d, a cylindrical portion 71 that is inserted and disposed in the inner hole 70 of the mount rubber 52d, and an outer peripheral surface of the damper mass 51d from one end of the cylindrical portion 71 radially outward. The mounting rubber 52d is sandwiched between the mounting surface of the vibrating body 74 and the flange portion 72 by tightening the mounting bolt 73 inserted into the inner hole 71a of the cylindrical portion 71. And a mounting member 75 that is mounted in a state of being.

上述した特許文献１ないし５に記載の技術は、金具部分であるダンパーマスの表面処理、化成処理、接着剤の塗布処理などが必要なく、生産性を上げることが出来、ひいては低コストを実現できるという特徴を謳っている。 The techniques described in Patent Documents 1 to 5 described above do not require surface treatment, chemical conversion treatment, adhesive coating treatment, or the like of the damper mass that is a metal fitting portion, and can increase productivity and thus realize low cost. The feature is sung.

しかしながら、特許文献１に記載されたものは、マウントラバー５２ａにおけるシャフト６１に固定する部分と共振特性を出す部分とが一体であるため、その部分が圧縮成分となり、この圧縮成分が共振周波数特性を司ることになって共振周波数が高くなり、低周波域での共振特性を得ることが難しくなる。それゆえ、低周波域での共振特性を得るには、マウントラバー５２ａの剛性を下げる必要があるが、材料に限界があり、現状では実現が難しい。 However, what is described in Patent Document 1 is that the portion fixed to the shaft 61 of the mount rubber 52a and the portion that produces the resonance characteristics are integrated, so that the portion becomes a compression component, and this compression component exhibits the resonance frequency characteristic. As a result, the resonance frequency becomes high, and it becomes difficult to obtain resonance characteristics in a low frequency range. Therefore, in order to obtain the resonance characteristics in the low frequency range, it is necessary to lower the rigidity of the mount rubber 52a, but there is a limit to the material, which is difficult to realize at present.

また、特許文献２に記載されたものは、特許文献１と同様に生産性を上げることが出来、低コストを実現できるが、上記した特許文献１と同じ理由で低周波域での共振特性を得ることが出来ない。 Moreover, although what was described in patent document 2 can raise productivity similarly to patent document 1, and can implement | achieve low cost, it has the resonance characteristic in a low frequency region for the same reason as above-mentioned patent document 1. I can't get it.

また、特許文献３に記載されたものは、金具部分である取付パイプ５４、ダンパーマス５１ｃ、アウターパイプ５０ｃの表面処理、化成処理、接着剤の塗布処理などが必要ないが、その一方で圧入するための器具と圧入工程が必要となり、生産性を上げたことにならず、実際には低コストを実現することは困難である。 Moreover, although what was described in patent document 3 does not require the surface treatment of the attachment pipe 54 which is a metal fitting part, the damper mass 51c, and the outer pipe 50c, a chemical conversion treatment, the application | coating process of an adhesive agent, it press-fits on the other hand For this reason, a tool and a press-fitting process are required, and productivity is not increased, and it is actually difficult to realize low cost.

また、特許文献４に記載されたものは、特許文献３における取付パイプ５４、アウターパイプ５６を樹脂製としたに過ぎず、上記した特許文献３と同じ理由で生産性を上げたことにならず、この技術も、実質的には低コストを実現することは困難である。 Further, what is described in Patent Document 4 is merely that the mounting pipe 54 and the outer pipe 56 in Patent Document 3 are made of resin, and the productivity is not increased for the same reason as in Patent Document 3 described above. In this technique, it is difficult to realize a low cost substantially.

さらに、特許文献５に記載されたものは、ダンパーマス５１ｄが中空であるが、マウントラバー５２ｄ及び取付部材７５を圧入する工程があり、さらにマウントラバー５２ｄを固定する部分と共振特性を出す部分とが一体となり、その部分が圧縮成分となって、この圧縮成分が共振周波数特性を司ることになって共振周波数が高くなり、特許文献１と同様に低周波域での共振特性を得ることが難しくなることになる。 Further, the one described in Patent Document 5 has a damper mass 51d that is hollow, but has a step of press-fitting the mount rubber 52d and the mounting member 75, and a portion that fixes the mount rubber 52d and a portion that exhibits resonance characteristics. And the portion becomes a compression component, and this compression component governs the resonance frequency characteristic, so that the resonance frequency becomes high, and it is difficult to obtain the resonance characteristic in the low frequency region as in Patent Document 1. Will be.

以上述べた従来技術の技術的問題点を踏まえて、本発明者は、中空シャフトの径の大小にかかわらず、高い軸直角ばね特性を有しつつ、低周波域から高周波域での共振特性を得ることが可能となり、かつダンパーマス以外の金属部分を無くしたダイナミックダンパーを開発し、特願２００５−３７４８９３として特許出願を行なっている。
そして、上記出願後にさらに性能向上を目指して該技術を追試する過程で、ダンマスを中空にすることにより、両端を貫通する弾性体支持部が形成され、ストッパーとしてダンパーマス外周をゴム弾性体が覆うため、非接着でもダイナミックダンパーの機能を十分に果たすことができる点に着目し、本発明を完成するに至ったものである。 In light of the technical problems of the prior art described above, the present inventor has a resonance characteristic from a low frequency range to a high frequency range while having a high axis perpendicular spring characteristic regardless of the diameter of the hollow shaft. A dynamic damper has been developed that can be obtained and has no metal parts other than the damper mass, and a patent application has been filed as Japanese Patent Application No. 2005-374893.
Then, in the process of pursuing the technology with the aim of further improving the performance after the above application, the elastic body supporting portion penetrating both ends is formed by hollowing the damper mass, and the rubber elastic body covers the outer periphery of the damper mass as a stopper For this reason, the present invention has been completed by paying attention to the point that the function of the dynamic damper can be sufficiently achieved even without bonding.

本発明は、上記目的を達成するために提案されたものであって、下記の構成からなることを特徴とするものである。
すなわち、本発明によれば、中空シャフト内に遊嵌するダンパーマスと、該ダンパーマス両側に位置して前記中空シャフト内に圧縮により固定する装着部材と、前記ダンパーマスと両側の装着部材とを連結する一体的連結部材とからなり、前記一体的連結部材は、両側の装着部材に前記ダンパーマスを、弾性的に且つ互いに同一軸となるように連結すると共に、前記同一軸に対して傾斜した傾斜連結部と、両側の傾斜連結部を繋ぐ接続部とからなることを特徴とするダイナミックダンパーが提供される。 The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention, the damper mass loosely fitted in the hollow shaft, the mounting member positioned on both sides of the damper mass and fixed by compression in the hollow shaft, and the damper mass and the mounting members on both sides are provided. The integrated connecting members are connected to the mounting members on both sides so that the damper masses are elastically connected to each other on the same axis and inclined with respect to the same axis. A dynamic damper is provided that includes an inclined connecting portion and a connecting portion that connects the inclined connecting portions on both sides.

また、本発明によれば、前記一体的連結部材の接続部は、前記ダンパーマスにこれの軸方向に設けた孔を通した孔接続部であるダイナミックダンパーが提供される。 Further, according to the present invention, there is provided a dynamic damper, wherein the connecting portion of the integral connecting member is a hole connecting portion in which a hole provided in the axial direction of the damper mass is passed.

また、本発明によれば、前記一体的連結部材の接続部は、前記ダンパーマス外周面上にほぼ等間隔に渡した少なくとも５条以上の凸条接続部であるダイナミックダンパーが提供される。 Further, according to the present invention, there is provided a dynamic damper, wherein the connecting portion of the integral connecting member is at least five or more ridge connecting portions that are provided at substantially equal intervals on the outer periphery of the damper mass.

また、本発明によれば、隣接する前記凸条接続部同士が円周方向に帯状に形成された橋絡部によって連接されてなる上記ダイナミックダンパーが提供される。 In addition, according to the present invention, there is provided the dynamic damper in which the adjacent protrusion connecting portions adjacent to each other are connected by a bridging portion formed in a belt shape in the circumferential direction.

また、本発明によれば、前記一体的連結部材の接続部は、前記孔接続部及び前記凸条接続部により構成したダイナミックダンパーが提供される。 Moreover, according to this invention, the dynamic damper comprised as the connection part of the said integral connection member by the said hole connection part and the said protruding item | line connection part is provided.

また、本発明によれば、前記一体的連結部材の傾斜連結部における前記同一軸に対する傾斜は、４５±２０度の範囲であるダイナミックダンパーが提供される。 In addition, according to the present invention, there is provided a dynamic damper having an inclination with respect to the same axis in the inclined connecting portion of the integral connecting member in a range of 45 ± 20 degrees.

また、本発明によれば、前記装着部材の一方の輪径が他方の装着部材の輪径よりも小径にされてなるダイナミックダンパーが提供される。 In addition, according to the present invention, there is provided a dynamic damper in which one wheel diameter of the mounting member is made smaller than a wheel diameter of the other mounting member.

また、本発明によれば、前記装着部材の中空シャフトとの接触面に、円周上等間隔に軸方向に延びている切り欠きが３箇所以上形成されてなるダイナミックダンパーが提供される。 In addition, according to the present invention, there is provided a dynamic damper in which three or more notches extending in the axial direction at equal intervals on the circumference are formed on the contact surface of the mounting member with the hollow shaft.

また、本発明によれば、上記したダイナミックダンパーにおける両側の前記装着部材の内側端部間に位置する前記中空シャフトに、凹凸部を設けて、該凹凸部を前記中空シャフトに前記ダイナミックダンパーを挿入する際の位置決めとしたことを特徴とする中空プロペラシャフトが提供される。 Further, according to the present invention, the hollow shaft located between the inner ends of the mounting members on both sides of the dynamic damper described above is provided with an uneven portion, and the uneven portion is inserted into the hollow shaft. A hollow propeller shaft is provided which is characterized in that the positioning is performed.

また、本発明によれば、上記したダイナミックダンパーにおける両側の前記装着部材の外側端部間に位置する前記中空シャフトに、前記装着部材の外側端部間距離Ｌより短い圧縮凹凸部を設けて、前記中空シャフトに前記ダイナミックダンパーを挿入した際、前記圧縮凹凸部により同一軸に対して傾斜してなる前記一体的連結部材を圧縮するようにしたことを特徴とする中空プロペラシャフトが提供される。 According to the present invention, the hollow shaft located between the outer ends of the mounting members on both sides of the dynamic damper described above is provided with a compression uneven portion shorter than the distance L between the outer ends of the mounting members, When the dynamic damper is inserted into the hollow shaft, there is provided a hollow propeller shaft that compresses the integral connecting member that is inclined with respect to the same axis by the compression uneven portion.

本発明のダイナミックダンパーは、中空シャフト内に遊嵌するダンパーマスが傾斜してなる一体的連結部材の傾斜連結部にて両側の装着部材に連結しているため、傾斜連結部はせん断成分と圧縮成分とが支配的となり、この傾斜連結部の質量及び剛性を調整すれば、高い軸直角ばね特性を保持しながら低周波から高周波の広い範囲での共振特性を出すことができる。一方、この一体的連結部材に関わりなく中空シャフト内に装着部材にて圧縮固定することができる。したがって、中空プロペラシャフトにおける中空シャフトの径の大小にかかわらず、構造的に一体的連結部材や装着部材に傷が付かず耐久性を保持でき、高い軸直角ばね特性を有しつつ、低周波域から高周波域での共振特性を得ることが可能となり、その上、ダンパーマス以外の金属部分を無くし、且つ両側の傾斜連結部同士を接続部により繋ぐことで非接着となり、生産性を上げてコストを下げ得、中空シャフトへの装着も容易となる効果がある。 Since the dynamic damper of the present invention is connected to the mounting members on both sides by the inclined connecting portion of the integral connecting member in which the damper mass loosely fitted in the hollow shaft is inclined, the inclined connecting portion is compressed with the shear component. By adjusting the mass and rigidity of the inclined connecting portion, the resonance characteristics in a wide range from a low frequency to a high frequency can be obtained while maintaining a high axis perpendicular spring characteristic. On the other hand, regardless of the integral connecting member, it can be compressed and fixed in the hollow shaft by the mounting member. Therefore, regardless of the diameter of the hollow shaft of the hollow propeller shaft, the structurally integrated connecting member and mounting member are not damaged and can maintain durability, and have a high axial right-angle spring characteristic and a low frequency range. In addition, it is possible to obtain resonance characteristics in the high frequency range, and in addition, the metal parts other than the damper mass are eliminated, and the inclined connecting parts on both sides are connected to each other by the connecting parts, so that the productivity is increased and the cost is increased. And can be easily mounted on the hollow shaft.

また、一体的連結部材は、これのダンパーマスの孔を通した孔接続部により、両側の傾斜連結部同士を繋ぐことで、ダンパーマスと一体的連結部材とが非接着となり、上記した効果がより一層確実となる。 In addition, the integral connecting member connects the inclined connecting portions on both sides by the hole connecting portion through the hole of the damper mass so that the damper mass and the integral connecting member are not bonded, and the above-described effects are obtained. It will be even more certain.

また、一体的連結部材は、これのダンパーマス外周面上に渡した凸条接続部により、両側の傾斜連結部同士を繋ぐことで、ダンパーマスと一体的連結部材とが非接着となり、上記した効果がより一層確実となる。その上、中空シャフトが常用回転域を越えて振幅が異常に大となると、凸条接続部がストッパーとして機能し、中空シャフトの内壁に当たり一体的連結部材がそれ以上変形しない。したがって、エンジンの常用回転域での軸直角方向の防振機能を果たしつつ、常用回転域を大きく越え、加速度が大幅に増加しても同じく防振機能を果たし、且つ変形を抑制するから、充分な耐久性を有する。 Moreover, an integral connection member becomes non-adhesion between a damper mass and an integral connection member by connecting the inclined connection parts of both sides by the protruding item | line connection part passed on this damper mass outer peripheral surface, and was mentioned above. The effect is even more certain. In addition, when the amplitude of the hollow shaft exceeds the normal rotation range and the amplitude becomes abnormally large, the convex connecting portion functions as a stopper, and the integral connecting member does not deform further by hitting the inner wall of the hollow shaft. Therefore, while maintaining the anti-vibration function in the direction perpendicular to the axis in the normal rotation range of the engine, the normal rotation range is greatly exceeded, and even if the acceleration is greatly increased, the anti-vibration function is also performed and deformation is suppressed. Has excellent durability.

また、一体的連結部材は、上記した孔接続部及び凸条接続部により、両側の傾斜連結部同士を繋ぐことで、ダンパーマスと一体的連結部材とが非接着となり、上記した効果がより一層確実となる。その上、上記した凸条接続部によるストッパー機能もある。 Further, the integral connecting member connects the inclined connecting portions on both sides by the hole connecting portion and the convex connecting portion described above, so that the damper mass and the integral connecting member are not bonded, and the above-described effects are further enhanced. It will be certain. In addition, there is also a stopper function by the above-mentioned protruding line connecting portion.

また、一体的連結部材の傾斜連結部は、せん断成分と圧縮成分とがより確実に支配的となって、上記した効果がより一層確実となる。 Further, in the inclined connecting portion of the integral connecting member, the shear component and the compression component are more surely dominant, and the above-described effect is further ensured.

また、装着部材の一方の輪径を他方の輪径よりも小径とするか、装着部材の中空シャフトの内周との接触面に、円周上等間隔に軸方向に延びている切り欠きを３箇所以上形成することにより、中空シャフトへの装着部材の装着がよりスムーズに行うことができる。 Further, a notch extending in the axial direction at equal intervals on the circumference is formed on the contact surface of the mounting member with the inner diameter of the hollow shaft of the mounting member so that one of the mounting members has a smaller diameter than the other. By forming three or more locations, the mounting member can be mounted on the hollow shaft more smoothly.

また、中空プロペラシャフトにおける中空シャフトにダイナミックダンパーを挿入する際、その挿入位置を凹凸部により決めることにより、上記効果に加えて、中空シャフトにダイナミックダンパーを装着する操作が極めて容易となる。 Further, when the dynamic damper is inserted into the hollow shaft of the hollow propeller shaft, the insertion position is determined by the concavo-convex portion, so that in addition to the above effects, the operation of mounting the dynamic damper on the hollow shaft becomes extremely easy.

また、中空プロペラシャフトにおける中空シャフトにダイナミックダンパーを挿入した際、圧縮凹凸部により装着部材及び一体的連結部材のうち特に一体的連結部材の傾斜連結部を圧縮することになる。したがって、上記効果に加えて、この圧縮によりダイナミックダンパーの耐久性を向上させることができる。 In addition, when the dynamic damper is inserted into the hollow shaft of the hollow propeller shaft, the inclined connecting portion of the mounting member and the integrated connecting member is compressed by the compression uneven portion, particularly the integrated connecting member. Therefore, in addition to the above effects, the durability of the dynamic damper can be improved by this compression.

以下に、図面を参照して本発明を実施するための最良の形態を説明する。 The best mode for carrying out the present invention will be described below with reference to the drawings.

＜実施例１＞
図１は本発明のダイナミックダンパーを示す断面図、図２は本発明のダイナミックダンパーを中空プロペラシャフト内に装着する操作状態を示す断面図、図３は本発明のダイナミックダンパーを中空プロペラシャフト内に装着した状態を示す断面図である。
これらの図面において、本発明のダイナミックダンパー１は、中空プロペラシャフトにおける中空シャフト２内に遊嵌するダンパーマス３と、このダンパーマス３両側に位置して中空シャフト２内に圧縮により固定する装着部材４、５と、ダンパーマス３と両側の装着部材４、５とを連結する一体的連結部材７とからなり、この一体的連結部材７は、両側の装着部材４、５にダンパーマス３を、弾性的に且つ互いに同一軸６になるように連結すると共に、同一軸６に対して傾斜した傾斜連結部７ａ、７ｂと、両側の傾斜連結部７ａ、７ｂを繋ぐ接続部７ｃとからなるものであり、一体に成形されている。 <Example 1>
FIG. 1 is a cross-sectional view showing a dynamic damper of the present invention, FIG. 2 is a cross-sectional view showing an operation state of mounting the dynamic damper of the present invention in a hollow propeller shaft, and FIG. 3 is a cross-sectional view of the dynamic damper of the present invention in the hollow propeller shaft. It is sectional drawing which shows the mounted state.
In these drawings, a dynamic damper 1 of the present invention includes a damper mass 3 that is loosely fitted in a hollow shaft 2 of a hollow propeller shaft, and a mounting member that is positioned on both sides of the damper mass 3 and is fixed to the hollow shaft 2 by compression. 4, 5, and an integral coupling member 7 that couples the damper mass 3 and the mounting members 4, 5 on both sides. The integral coupling member 7 attaches the damper mass 3 to the mounting members 4, 5 on both sides, It is elastically connected to each other so as to be on the same axis 6, and is composed of inclined connecting portions 7a, 7b inclined with respect to the same axis 6, and connecting portions 7c connecting the inclined connecting portions 7a, 7b on both sides. Yes, it is molded integrally.

ダンパーマス３は、ある程度の重量が必要となるので、経済性から鋳鉄や鋼鉄が多く用いられる。装着部材４、５及び一体的連結部材７は、いずれも弾性体であるＳＢＲ（スチレン−ブタジエン共重合系合成ゴム）や天然ゴム、あるいはそれらの混合物が用いられる
。しかし、これら装着部材４、５及び一体的連結部材７は、従来技術のマウントラバー５２とは異なり、装着部材４、５はラバー５３を貼り付けたアウターパイプ５０に相当し、一体的連結部材７はマウントラバー５２に相当する、と言うことができる Since the damper mass 3 requires a certain amount of weight, cast iron and steel are often used for economy. The mounting members 4 and 5 and the integral connecting member 7 are made of SBR (styrene-butadiene copolymer synthetic rubber) which is an elastic body, natural rubber, or a mixture thereof. However, the mounting members 4 and 5 and the integral connecting member 7 are different from the mounting rubber 52 of the prior art, and the mounting members 4 and 5 correspond to the outer pipe 50 to which the rubber 53 is attached. Can be said to correspond to the mount rubber 52

この実施例では、ダンパーマス３は、これの軸方向に孔８を設けて円環盤状であり、この孔８には、後述のとおり、一体的連結部材７の接続部７ｃとして孔接続部１２が通り、装着部材４側の傾斜連結部７ａと、装着部材５側の傾斜連結部７ｂとを繋ぎ一体としている。なお、ダンパーマス３の形状は、これに限定されるものではなく、後述するように、種々変わることができる。 In this embodiment, the damper mass 3 has a circular disk shape with a hole 8 provided in the axial direction thereof, and the hole 8 has a hole connecting portion as a connecting portion 7c of the integral connecting member 7 as described later. 12, the inclined connecting portion 7a on the mounting member 4 side and the inclined connecting portion 7b on the mounting member 5 side are connected and integrated. The shape of the damper mass 3 is not limited to this, and can be variously changed as will be described later.

装着部材４、５は、円盤１０に孔１１を開けた円環盤状を成し、ダイナミックダンパー１を中空シャフト２内に装着保持する役目を担っている。すなわち、装着部材４、５の円盤１０の外径は中空シャフト２の内径よりもやや大きく形成され、中空シャフト２内に装着部材４、５を圧入することで、強固に圧縮固定するから、この装着に関して一体的連結部材７にほとんど影響を及ぼすことがない。また、装着部材４、５の円盤１０の周縁部をカットすることにより、中空シャフト２内にダイナミックダンパー１を圧入し易くしている。 The mounting members 4 and 5 have a circular disk shape in which a hole 11 is formed in the disk 10 and play a role of mounting and holding the dynamic damper 1 in the hollow shaft 2. That is, the outer diameter of the disk 10 of the mounting members 4 and 5 is formed to be slightly larger than the inner diameter of the hollow shaft 2, and the mounting members 4 and 5 are press-fitted into the hollow shaft 2 to be firmly compressed and fixed. There is almost no influence on the integral connecting member 7 in terms of mounting. Further, the dynamic damper 1 is easily press-fitted into the hollow shaft 2 by cutting the peripheral portion of the disk 10 of the mounting members 4 and 5.

一体的連結部材７は、前記ダンパーマス３と装着部材４、５とを連結するものであり、
装着部材４側の傾斜連結部７ａと装着部材５側の傾斜連結部７ｂとを、前記接続部７ｃにより繋ぎ一体としている。すなわち、この実施例の接続部７ｃは、ダンパーマス３の孔８を通る孔接続部１２であり、これによって、傾斜連結部７ａと７ｂとを繋ぎ一体としている。さらに、この実施例では、一体的連結部材７と装着部材４、５とが一体に形成されている。すなわち、装着部材４、５の円盤１０の片側面とダンパーマス３の両側平面とは、傾斜した連続壁面形状、換言すれば傾斜連結部７ａ、７ｂにて連結されている。 The integral connecting member 7 connects the damper mass 3 and the mounting members 4, 5;
The inclined connecting portion 7a on the mounting member 4 side and the inclined connecting portion 7b on the mounting member 5 side are connected and integrated by the connecting portion 7c. That is, the connecting portion 7c of this embodiment is a hole connecting portion 12 that passes through the hole 8 of the damper mass 3, thereby connecting the inclined connecting portions 7a and 7b together. Further, in this embodiment, the integral connecting member 7 and the mounting members 4 and 5 are integrally formed. That is, one side surface of the disk 10 of the mounting members 4 and 5 and the both side planes of the damper mass 3 are connected by an inclined continuous wall shape, in other words, the inclined connection portions 7a and 7b.

したがって、一体的連結部材７における傾斜連結部７ａ、７ｂは、せん断成分と圧縮成分とが支配的となり、傾斜連結部７ａ、７ｂの長さ、角度及び剛性を調整すれば、高い軸直角ばね特性を保持しながら、低周波から高周波の広い範囲での共振特性を出すことが可能となる。上述したように、装着部材４、５は、装着に関して一体的連結部材７の傾斜連結部７ａ、７ｂにほとんど影響を及ぼさないから、これら傾斜連結部７ａ、７ｂの上記特性も装着部材４、５により影響されずに得ることができる。
また、一体的連結部材７の傾斜連結部７ａ、７ｂが傾斜した連続壁面形状、換言すれば傘形状であるため、中空シャフト２内に装着する際に円盤状の装着部材４、５の倒れ防止に対しても寄与している。 Therefore, the inclined connecting portions 7a and 7b in the integral connecting member 7 have a dominant shear component and compressive component, and if the length, angle and rigidity of the inclined connecting portions 7a and 7b are adjusted, high axial right-angle spring characteristics are obtained. It is possible to obtain resonance characteristics in a wide range from low frequency to high frequency. As described above, since the mounting members 4 and 5 have little influence on the inclined connecting portions 7a and 7b of the integral connecting member 7 with respect to the mounting, the above characteristics of the inclined connecting portions 7a and 7b are also the same. It can be obtained without being affected by.
Further, since the inclined connecting portions 7a and 7b of the integral connecting member 7 are in the shape of a continuous wall, in other words, an umbrella shape, the disc-shaped mounting members 4 and 5 are prevented from falling when mounted in the hollow shaft 2. Has also contributed.

また、一体的連結部材７の傾斜連結部７ａ、７ｂの同一軸６に対する傾斜角度αは、４５±２０度の範囲である。この傾斜角度αの範囲内にある傾斜連結部７ａ、７ｂは、せん断成分と圧縮成分とが確実に支配的となり、高い軸直角ばね特性を保持しながら、低周波から高周波の広い範囲での共振特性を確実に出すことが出来る。一方、この傾斜角度αが２５度より小さくなると、せん断成分と曲げ成分とが主流となり、高い軸直角ばね特性を保持できず、低周波寄りの共振特性しか得ることができないようになる。逆に、この傾斜角度αが６５度より大きくなると、圧縮成分が主流となり、高い軸直角ばね特性を得られるが、高周波寄りの共振特性しか得ることができないようになる。以上の理由から同一軸６に対する傾斜角度αを４５±２０度に規定したが、より好ましい傾斜角度αは、４５±１０度の範囲である。 Further, the inclination angle α of the inclined connecting portions 7a and 7b of the integral connecting member 7 with respect to the same axis 6 is in the range of 45 ± 20 degrees. In the inclined connecting portions 7a and 7b within the range of the inclination angle α, the shear component and the compression component are surely dominant, and the resonance in a wide range from a low frequency to a high frequency is maintained while maintaining a high axis perpendicular spring characteristic. The characteristics can be reliably obtained. On the other hand, when the inclination angle α is smaller than 25 degrees, the shear component and the bending component become mainstream, and high axial right-angle spring characteristics cannot be maintained, and only low-frequency resonance characteristics can be obtained. On the other hand, when the inclination angle α is larger than 65 degrees, the compression component becomes mainstream, and high axial right-angle spring characteristics can be obtained, but only high-frequency resonance characteristics can be obtained. For the above reasons, the inclination angle α with respect to the same axis 6 is defined as 45 ± 20 degrees, but the more preferable inclination angle α is in the range of 45 ± 10 degrees.

上記構成のダイナミックダンパー１は、ダンパーマス３、装着部材４、５、一体的連結部材７の傾斜連結部７ａ、７ｂが同一軸６上となるように一体に作られる。なお、装着部材４、５、一体的連結部材７を同一のゴム素材とすれば、金型を使い射出成形などにより非接着で一気に製作が可能となり、接着に伴って金属部分であるダンパーマス３の表面処理、化成処理、接着剤塗布が必要なくなる。この製作されたダイナミックダンパー１は、図２、３に示すように、中空シャフト２内に圧入され使用されるが、この際もダイナミックダンパー１の同一軸６と中空シャフト２の軸１３とを一致させることが重要である。 The dynamic damper 1 having the above-described configuration is integrally formed so that the damper mass 3, the mounting members 4 and 5, and the inclined connection portions 7 a and 7 b of the integrated connection member 7 are on the same shaft 6. If the mounting members 4 and 5 and the integral connecting member 7 are made of the same rubber material, it is possible to manufacture at once by non-adhesion by injection molding or the like using a mold, and the damper mass 3 which is a metal part along with adhesion. No surface treatment, chemical conversion treatment, or adhesive application is required. The manufactured dynamic damper 1 is used by being press-fitted into the hollow shaft 2 as shown in FIGS. 2 and 3. In this case as well, the same shaft 6 of the dynamic damper 1 and the shaft 13 of the hollow shaft 2 coincide with each other. It is important to let

そして、このような構成のダイナミックダンパー１であっても、図４に示すように、有効な吸振効果を期待できる周波数域を得ることができ、一体的連結部材７の傾斜連結部７ａ、７ｂの長さ、角度及び剛性を調整すれば、高い軸直角ばね特性を保持しながら、この周波数域を横軸方向に左右移動が可能となり、低周波から高周波の広い範囲での共振特性を出すことが出来る。 And even if it is the dynamic damper 1 of such a structure, as shown in FIG. 4, the frequency range which can anticipate an effective vibration-absorbing effect can be obtained, and the inclination connection parts 7a and 7b of the integral connection member 7 can be obtained. By adjusting the length, angle, and rigidity, it is possible to move the frequency range from side to side in the horizontal axis direction while maintaining high right-angle spring characteristics, and to produce resonance characteristics in a wide range from low to high frequencies. I can do it.

次に、上記構成になるダイナミックダンパー１の作用について説明する。
まず、中空プロペラシャフトの中空シャフト２の径や回転数に適合するダイナミックダンパー１を選択し、中空シャフト２内にダイナミックダンパー１を圧入により装着する。この際、装着状態でダイナミックダンパー１の同一軸６と中空シャフト２の軸１３とを一致させるようにする。ダイナミックダンパー１は、一体的連結部材７の傾斜連結部７ａ、７ｂに関わりなく中空ラシャフト２内に装着部材４、５が圧縮して固定するから、傾斜連結部７ａ、７ｂはせん断成分と圧縮成分とが支配的となる。その結果、高い軸直角ばね特性を保持しながら、低周波から高周波の広い範囲での共振特性を出すことが出来て、設計の自由度が著しく高まる。しかも、中空プロペラシャフトの径が小さくなっても、構造的に一体的連結部材７や装着部材４、５に傷が付かないから、耐久性を保持でき、さらにダンパーマス３以外の金属部分を無くすことが出来、加えて接着も必要ないから低コストが可能となる。 Next, the operation of the dynamic damper 1 configured as described above will be described.
First, a dynamic damper 1 that matches the diameter and rotation speed of the hollow shaft 2 of the hollow propeller shaft is selected, and the dynamic damper 1 is fitted into the hollow shaft 2 by press fitting. At this time, the same shaft 6 of the dynamic damper 1 and the shaft 13 of the hollow shaft 2 are made to coincide with each other in the mounted state. In the dynamic damper 1, the mounting members 4 and 5 are compressed and fixed in the hollow rubber shaft 2 regardless of the inclined connecting portions 7a and 7b of the integral connecting member 7, so that the inclined connecting portions 7a and 7b have a shear component and a compressive component. And become dominant. As a result, it is possible to obtain resonance characteristics in a wide range from low frequencies to high frequencies while maintaining high axis right-angle spring characteristics, and the degree of freedom in design is significantly increased. Moreover, even if the diameter of the hollow propeller shaft is reduced, the structurally integrated connecting member 7 and mounting members 4 and 5 are not damaged, so that durability can be maintained and metal parts other than the damper mass 3 are eliminated. In addition, since no bonding is required, the cost can be reduced.

次に、上記構成になるダイナミックダンパー１が中空プロペラシャフトの軸とわずかなズレが生じていると、中空プロペラシャフトの回転に伴い、遠心力が働く。中空プロペラシャフトが回転して、それが常用回転域内、例えば５０００ｒｐｍであれば、一体的連結部材７の傾斜連結部７ａ、７ｂの歪みが少なく、ダンパーマス３上に、後述のように、等間隔に設置した複数条の凸条接続部１４がストッパーの役割を果たし、凸条接続部１４が中空シャフト２の内壁に当たることがなく、中空プロペラシャフトの静粛性を保持する。一方、中空プロペラシャフトの回転が常用回転域を越えて、例えば、７０００ｒｐｍになると、傾斜連結部７ａ、７ｂの歪みが大きくなり、凸条接続部１４が中空シャフト２の内壁に当たり、傾斜連結部７ａ、７ｂの歪みがそれ以上進まず、耐久性を確保すると共に、中空プロペラシャフトの静粛性も保持する。 Next, when the dynamic damper 1 configured as described above has a slight deviation from the axis of the hollow propeller shaft, centrifugal force is applied as the hollow propeller shaft rotates. If the hollow propeller shaft rotates and is within the normal rotation range, for example, 5000 rpm, the inclined connecting portions 7a and 7b of the integral connecting member 7 are less distorted and are equally spaced on the damper mass 3 as will be described later. The plurality of ridge connecting portions 14 installed on the wing serve as a stopper, so that the ridge connecting portions 14 do not hit the inner wall of the hollow shaft 2 and the quietness of the hollow propeller shaft is maintained. On the other hand, when the rotation of the hollow propeller shaft exceeds the normal rotation range, for example, 7000 rpm, the distortion of the inclined connecting portions 7a and 7b increases, and the ridge connecting portion 14 hits the inner wall of the hollow shaft 2, and the inclined connecting portion 7a. The distortion of 7b does not progress any more, ensuring durability and maintaining the quietness of the hollow propeller shaft.

図５は中空プロペラシャフトにおける中空シャフト２の形状を示すものであり、その形状は、中空シャフト２に上記したダイナミックダンパー１を装着した際、両側の装着部材４、５の内側端部間に位置することになる中空シャフト２に、予め凹凸部１５を設けておき、この凹凸部１５を中空シャフト２にダイナミックダンパー１を圧入する際の位置決めとするものである。これにより、中空シャフト２にダイナミックダンパー１を圧入する際、その圧入位置を凹凸部１５により決めることができて、装着操作が極めて容易となる。 FIG. 5 shows the shape of the hollow shaft 2 in the hollow propeller shaft, and the shape is located between the inner ends of the mounting members 4 and 5 on both sides when the dynamic damper 1 is mounted on the hollow shaft 2. The concave / convex portion 15 is provided in advance in the hollow shaft 2 to be used, and the concave / convex portion 15 is positioned when the dynamic damper 1 is press-fitted into the hollow shaft 2. As a result, when the dynamic damper 1 is press-fitted into the hollow shaft 2, the press-fitting position can be determined by the concavo-convex portion 15, and the mounting operation becomes extremely easy.

図６は中空シャフト２の他の形状を示すものであり、この形状は、中空シャフト２に上記したダイナミックダンパー１を装着した際、両側の装着部材４、５の外側端部間に位置することになる中空シャフト２に、装着部材４、５の外側端部間距離Ｌより短い圧縮凹凸部１６を予め設けておき、この中空シャフト２にダイナミックダンパー１を圧入した際、この圧縮凹凸部１６によりダイナミックダンパー１を圧縮するものである。これにより、装着部材４、５及び一体的連結部材７のうち特に傾斜連結部７ａ、７ｂを圧縮することになって、ダイナミックダンパー１の耐久性を向上させることができる。 FIG. 6 shows another shape of the hollow shaft 2, and this shape is located between the outer ends of the mounting members 4 and 5 on both sides when the dynamic damper 1 is mounted on the hollow shaft 2. When the compression uneven portion 16 shorter than the distance L between the outer end portions of the mounting members 4, 5 is provided in advance in the hollow shaft 2, and the dynamic damper 1 is press-fitted into the hollow shaft 2, the compression uneven portion 16 The dynamic damper 1 is compressed. Thereby, especially the inclination connection part 7a, 7b is compressed among the mounting members 4 and 5 and the integral connection member 7, and durability of the dynamic damper 1 can be improved.

＜実施例２＞
図７ないし９は本発明の他のダイナミックダンパー１ａを示し、このダイナミックダンパー１ａと図１ないし図４に示すダイナミックダンパー１との相違点は、ダンパーマス３ａに孔８がなく、したがって孔接続部１２もなく、その代わり、接続部７ｃとして、ダンパーマス３ａ外周面上にほぼ等間隔に渡した少なくとも５条以上の凸条接続部１４を有して、一体的連結部材７Ａを構成し、この凸条接続部１４により、両側の傾斜連結部７ａ、７ｂ同士を繋ぐ点にある。したがって、この凸条接続部１４により、両側の傾斜連結部７ａ、７ｂ同士を繋ぐことで、両側の装着部材４、５同士を連結するため、ダンパーマス３ａと一体的連結部材７Ａとを非接着とすることが出来る。
その上、中空シャフト２が常用回転域を越えて振幅が異常に大となると、両側の傾斜連結部７ａ、７ｂが歪み、凸条接続部１４が中空シャフト２の内壁に当たり、ストッパーとして機能して一体的連結部材７Ａの両側の傾斜連結部７ａ、７ｂがそれ以上変形しない。したがって、エンジンの常用回転域での軸直角方向の防振機能を果たしつつ、常用回転域を大きく越え、加速度が大幅に増加しても同じく防振機能を果たし、且つ変形を抑制するから、充分な耐久性を有する。その他の構成、作用は図１ないし図４に示すダイナミックダンパー１と同様なので、図面に符号を付してその説明を省略する。 <Example 2>
FIGS. 7 to 9 show another dynamic damper 1a of the present invention. The difference between the dynamic damper 1a and the dynamic damper 1 shown in FIGS. 1 to 4 is that the damper mass 3a does not have the hole 8, and therefore the hole connecting portion. 12 instead, the connecting portion 7c has at least five or more ridged connecting portions 14 provided on the outer peripheral surface of the damper mass 3a at almost equal intervals to form an integral connecting member 7A. It is in the point which connects the inclination connection parts 7a and 7b of both sides with the protruding item | line connection part 14. FIG. Therefore, by connecting the inclined connecting portions 7a and 7b on both sides by the convex connecting portion 14 to connect the mounting members 4 and 5 on both sides, the damper mass 3a and the integral connecting member 7A are not bonded. It can be.
In addition, when the hollow shaft 2 exceeds the normal rotation range and the amplitude becomes abnormally large, the inclined connecting portions 7a and 7b on both sides are distorted, and the ridge connecting portion 14 hits the inner wall of the hollow shaft 2 and functions as a stopper. The inclined connecting portions 7a and 7b on both sides of the integral connecting member 7A are not further deformed. Therefore, while maintaining the anti-vibration function in the direction perpendicular to the axis in the normal rotation range of the engine, the normal rotation range is greatly exceeded, and even if the acceleration is greatly increased, the anti-vibration function is also performed and deformation is suppressed. Has excellent durability. Since other configurations and operations are the same as those of the dynamic damper 1 shown in FIGS. 1 to 4, the reference numerals are assigned to the drawings and the description thereof is omitted.

＜実施例３＞
図１０ないし１２は、図７に示した実施例２の形態において、隣接する前記凸条接続部１４同士が円周方向に帯状に形成された橋絡部１７によって連接されてなるダイナミックダンパー１ｂの構成を示している。
橋絡部１７は凸条接続部１４同士を連接することによって凸条接続部の形状を安定化させ、本発明のダイナミックダンパー１ｂの機能を一層有効に発揮させるために有効であり、凸条接続部１４と同じ材質で形成されていることが、一体的に連接される上で好ましい。橋絡部１７の形状は特に限定されるものではないが、上記目的を一層有効にするためには、凸条接続部１４の軸方向の中央部を中心とする帯状に形成されていることが好ましいく、その高さは凸条接続部１４の高さとほぼ同じ程度であることが好ましい。
その他の構成、作用は図１ないし図４に示すダイナミックダンパー１並びに図７ないし９に示すダイナミックダンパー１ａと同様なので、図面に符号を付してその説明を省略する。 <Example 3>
FIGS. 10 to 12 show the dynamic damper 1b in the form of the embodiment 2 shown in FIG. 7 in which the adjacent ridge connecting portions 14 are connected by a bridging portion 17 formed in a belt shape in the circumferential direction. The configuration is shown.
The bridging portion 17 is effective for stabilizing the shape of the ridge connection portion by connecting the ridge connection portions 14 to each other, and more effectively exerting the function of the dynamic damper 1b of the present invention. It is preferable to be formed of the same material as the portion 14 in order to be integrally connected. The shape of the bridging portion 17 is not particularly limited, but in order to make the above-described purpose more effective, the bridging portion 17 may be formed in a belt shape centering on the central portion in the axial direction of the ridge connecting portion 14. Preferably, the height is preferably approximately the same as the height of the ridge connecting portion 14.
Other configurations and operations are the same as those of the dynamic damper 1 shown in FIGS. 1 to 4 and the dynamic damper 1a shown in FIGS.

＜実施例４＞
図１３は本発明の他のダイナミックダンパー１ｃを示し、このダイナミックダンパー１ｃと図１ないし図４に示すダイナミックダンパー１との相違点は、ダンパーマス３に孔８があり、したがって孔接続部１２もあり、その上、ダンパーマス３外周面上にほぼ等間隔に渡した少なくとも５条の凸条接続部１４も具備して接続部７ｃをなし、一体的連結部材７Ｂを構成して、これらの孔接続部１２及び凸条接続部１４により、両側の傾斜連結部７ａ、７ｂ同士を繋ぐ点にある。この一体的連結部材７Ｂの孔接続部１２及び凸条接続部１４により、両側の傾斜連結部７ａ、７ｂ同士を繋ぎ、両側の装着部材４、５同士を連結するから、ダンパーマス３ａと一体的連結部材７Ｂとが非接着となり、さらに凸条接続部１４があるから上記のようにストッパーとして機能する。すなわち、この実施例３は実施例１及び２を組み合わせたものとなる。その他の構成、作用は図１ないし図４に示すダイナミックダンパー１並びに図７ないし９に示すダイナミックダンパー１ａと同様なので、図面に符号を付してその説明を省略する。 <Example 4>
FIG. 13 shows another dynamic damper 1c of the present invention. The difference between the dynamic damper 1c and the dynamic damper 1 shown in FIGS. 1 to 4 is that the damper mass 3 has holes 8, and therefore the hole connecting portion 12 is also provided. In addition, at least five ridge connecting portions 14 are provided on the outer peripheral surface of the damper mass 3 at almost equal intervals to form a connecting portion 7c, thereby forming an integral connecting member 7B. It exists in the point which connects inclined connection part 7a, 7b of both sides by the connection part 12 and the protruding item | line connection part 14. FIG. The inclined connecting portions 7a and 7b on both sides are connected by the hole connecting portion 12 and the convex connecting portion 14 of the integral connecting member 7B, and the mounting members 4 and 5 on both sides are connected to each other. The connecting member 7B becomes non-adhered and further has the ridge connecting portion 14 so that it functions as a stopper as described above. That is, Example 3 is a combination of Examples 1 and 2. Other configurations and operations are the same as those of the dynamic damper 1 shown in FIGS. 1 to 4 and the dynamic damper 1a shown in FIGS.

＜実施例５＞
図１４は本発明の他のダイナミックダンパー１ｄを示し、このダイナミックダンパー１ｄと図１ないし図４に示すダイナミックダンパー１との相違点は、装着部材４（５）の一方の輪径ａが他方の装着部材５（４）の輪径ｂよりも小径にされていることにある。このように一方の装着部材の輪径が他方の装着部材の輪径よりも小径にされていることにより、小径にされている方の装着部材側から中空シャフト２に装着すれば、中空シャフト２内に装着が容易になり作業性が向上する。なお、小径にされている装着部材５（４）の輪径ａは、中空シャフト２の内径よりも若干大きければ良く、装着部材４（５）の輪径ｂはそれよりも大径にされていても、ゴムの弾性あるいは装着部材の外周面に塗布する油の作用で、ダイナミックダンパー１ｄは中空シャフト２内に圧縮状態で装着される。 <Example 5>
FIG. 14 shows another dynamic damper 1d of the present invention. The difference between the dynamic damper 1d and the dynamic damper 1 shown in FIGS. 1 to 4 is that one of the ring diameters a of the mounting member 4 (5) is the other. The diameter is smaller than the ring diameter b of the mounting member 5 (4). As described above, if the diameter of one of the mounting members is smaller than the diameter of the other mounting member, the hollow shaft 2 can be mounted on the hollow shaft 2 from the side of the smaller mounting member. It is easy to install inside and workability is improved. The ring diameter a of the mounting member 5 (4) having a small diameter may be slightly larger than the inner diameter of the hollow shaft 2, and the ring diameter b of the mounting member 4 (5) is made larger than that. However, the dynamic damper 1d is mounted in the hollow shaft 2 in a compressed state by the elasticity of rubber or the action of oil applied to the outer peripheral surface of the mounting member.

＜実施例６＞
図１５は本発明の他のダイナミックダンパー１ｅを示し、このダイナミックダンパー１ｅと図１ないし図４に示すダイナミックダンパー１との相違点は、装着部材４，５の中空シャフト２との接触面に円周上等間隔に軸方向に延びている切り欠き９が３箇所以上形成されてなることにある。このダイナミックダンパー１ｅの切り欠き９も、中空シャフト２への装着性の向上に寄与するものであり、切り欠き９があることにより、装着時にダイナミックダンパー１ｅの装着部材４、５の外周と中空シャフト２の内周との接触面積が減少し、装着時の作業性を高めることができる。また、切り欠き９があることによって、成形工程において残存した圧入油や、塗装前の洗浄液が、この切り欠き９を介して流下するため、従来わざわざ行なっていた不要な残存液の除去作業が不要になり、且つ、材料費のコストダウンにも寄与する。 <Example 6>
FIG. 15 shows another dynamic damper 1e of the present invention. The difference between the dynamic damper 1e and the dynamic damper 1 shown in FIGS. 1 to 4 is that the contact surfaces of the mounting members 4 and 5 with the hollow shaft 2 are circular. There are three or more cutouts 9 extending in the axial direction at equal intervals on the circumference. The notch 9 of the dynamic damper 1e also contributes to the improvement of the mounting property to the hollow shaft 2, and the presence of the notch 9 allows the outer periphery of the mounting members 4 and 5 of the dynamic damper 1e and the hollow shaft to be mounted. The contact area with the inner periphery of 2 can be reduced, and workability during mounting can be improved. In addition, the presence of the notch 9 allows the press-fit oil remaining in the molding process and the cleaning liquid before painting to flow down through the notch 9, eliminating the need to remove unnecessary residual liquid that has been conventionally performed. And contributes to a reduction in material costs.

切り欠き９の形成は、接触面に円周上等間隔に軸方向に延びていることが重要なのであって、その数はダイナミックダンパー１の大きさ、切り欠き９の幅や深さによっても異なるが、通常、円周上に等間隔に３箇所以上形成されていることが好ましい。ただし、例えば、切り欠き９が２０箇所以上のように多過ぎれば、装着部材４、５との圧縮力が弱まるので、装着部材４、５との圧縮力が弱まらない範囲、具体的には３箇所以上２０箇所以内の範囲内で好適な数を適宜採択すれば良い。 In forming the notches 9, it is important that the contact surfaces extend in the axial direction at equal intervals on the circumference, and the number thereof also varies depending on the size of the dynamic damper 1 and the width and depth of the notches 9. However, it is usually preferable that three or more locations are formed at equal intervals on the circumference. However, for example, if there are too many notches 9 such as 20 or more, the compressive force with the mounting members 4 and 5 is weakened. A suitable number may be appropriately selected within a range of 3 to 20 locations.

図１６に、非接着状態で構成される本発明のダイナミックダンパーの周波数特性と静ばね特性と、接着状態で構成されるダイナミックダンパーの周波数特性と静ばね特性を対比したグラフを示した。この図１６からも分かるように、本発明のダイナミックダンパーは、特定の構成にすることにより、接着状態で構成されるダイナミックダンパーとほぼ同程度の周波数特性と静ばね特性を示していることが理解される。 FIG. 16 shows a graph comparing the frequency characteristics and static spring characteristics of the dynamic damper of the present invention configured in an unbonded state with the frequency characteristics and static spring characteristics of the dynamic damper configured in an bonded state. As can be seen from FIG. 16, it is understood that the dynamic damper of the present invention exhibits frequency characteristics and static spring characteristics that are substantially the same as those of the dynamic damper configured in the bonded state by adopting a specific configuration. Is done.

以上、本発明の実施例１ないし６を説明したが、具体的な構成はこれに限定されず、本発明の要旨を逸脱しない範囲での変更は適宜可能であることは理解されるべきである。 As mentioned above, although Embodiment 1 thru | or 6 of this invention was demonstrated, it should be understood that a concrete structure is not limited to this and the change in the range which does not deviate from the summary of this invention is possible suitably. .

本発明のダイナミックダンパーは、非接着にして作製容易でありながら、中空プロペラシャフトの径の大小にかかわらず、高い軸直角ばね特性を有しつつ、低周波域から高周波域での共振特性を得たいような場合に利用可能性が高く、特に中空プロペラシャフトの径が小さく高速回転であるある場合に、利用可能性が極めて高くなる。 The dynamic damper of the present invention can be easily manufactured without bonding, and has a high axial right angle spring characteristic regardless of the diameter of the hollow propeller shaft, and obtains a resonance characteristic from a low frequency range to a high frequency range. Therefore, the applicability is very high, particularly when the hollow propeller shaft has a small diameter and is rotated at a high speed.

本発明の実施例１のダイナミックダンパーを示す断面図である。It is sectional drawing which shows the dynamic damper of Example 1 of this invention. 実施例１のダイナミックダンパーを中空プロペラシャフト内に装着する操作状態を示す断面図である。It is sectional drawing which shows the operation state which mounts the dynamic damper of Example 1 in a hollow propeller shaft. 実施例１のダイナミックダンパーを中空プロペラシャフト内に装着した状態を示す断面図である。It is sectional drawing which shows the state which mounted | wore the hollow propeller shaft with the dynamic damper of Example 1. FIG. 実施例１のダイナミックダンパーの周波数と共振倍率との特性図である。It is a characteristic view of the frequency and resonance magnification of the dynamic damper of Example 1. 実施例１のダイナミックダンパーを特殊形状の中空プロペラシャフトに装着した状態の断面図である。It is sectional drawing of the state which mounted | wore the hollow propeller shaft of the special shape with the dynamic damper of Example 1. FIG. 実施例１のダイナミックダンパーを特殊形状の中空プロペラシャフトに装着した状態の断面図である。It is sectional drawing of the state which mounted | wore the hollow propeller shaft of the special shape with the dynamic damper of Example 1. FIG. 本発明の実施例２のダイナミックダンパーを示す斜視図である。It is a perspective view which shows the dynamic damper of Example 2 of this invention. 実施例２のダイナミックダンパーを示す正面図である。FIG. 6 is a front view showing a dynamic damper of Example 2. 図８のＸ−Ｘ線に沿う断面図である。It is sectional drawing which follows the XX line of FIG. 本発明の実施例３のダイナミックダンパーを示す斜視図である。It is a perspective view which shows the dynamic damper of Example 3 of this invention. 実施例３のダイナミックダンパーを示す正面図である。FIG. 6 is a front view showing a dynamic damper of Example 3. 図１１のＹ−Ｙ線に沿う断面図である。It is sectional drawing which follows the YY line of FIG. 本発明の実施例４のダイナミックダンパーを示す断面図である。It is sectional drawing which shows the dynamic damper of Example 4 of this invention. 本発明の実施例５のダイナミックダンパーを示す断面図である。It is sectional drawing which shows the dynamic damper of Example 5 of this invention. 本発明の実施例６のダイナミックダンパーを示す断面図である。It is sectional drawing which shows the dynamic damper of Example 6 of this invention. 接着と非接着の場合の特性を対比して示すグラフである。It is a graph which compares and shows the characteristic in the case of adhesion | attachment and non-adhesion. 従来例のダイナミックダンパーの例を示す断面図である。It is sectional drawing which shows the example of the dynamic damper of a prior art example. 従来例のダイナミックダンパーの例を示す断面図である。It is sectional drawing which shows the example of the dynamic damper of a prior art example. 従来例のダイナミックダンパーの例を示す断面図である。It is sectional drawing which shows the example of the dynamic damper of a prior art example. 従来例のダイナミックダンパーの例を示す断面図である。It is sectional drawing which shows the example of the dynamic damper of a prior art example. 従来例のダイナミックダンパーの例を示す断面図である。It is sectional drawing which shows the example of the dynamic damper of a prior art example. 従来例のダイナミックダンパーの例を示す断面図である。It is sectional drawing which shows the example of the dynamic damper of a prior art example.

符号の説明Explanation of symbols

１，１ａ，１ｂ，１ｃ，１ｄ：ダイナミックダンパー
２：中空シャフト
３：，３ａ，３ｂ，５１，５１ａ，５１ｂ，５１ｃ，５１ｄ：ダンパーマス
４，５：装着部材
６：同一軸
７：７Ａ，７Ｂ：一体的連結部材
７ａ，７ｂ：傾斜連結部
７ｃ：接続部
８，１１：孔
９：切り欠き
１０：円盤
１２：孔接続部
１３：軸
１４：凸条接続部
１５：凹凸部
１６：圧縮凹凸部
１７：橋絡部
５０，５０ｃ，５６：アウターパイプ
５２，５２ａ，５２ｂ，５２ｃ，５２ｄ，：マウントラバー
５３，５３ａ：ラバー
５４：取付パイプ
５５：インナーパイプ
５７：凹溝
６０：中空プロペラシャフト
６１：シャフト
６２：環状溝
７０，７１ａ：内孔
７１：筒状部
７２：フランジ部
７３：取付ボルト
７４：振動体
７５：取付部材
α：一体的連結部材と軸との傾斜角度 1, 1a, 1b, 1c, 1d: Dynamic damper 2: Hollow shaft 3 :, 3a, 3b, 51, 51a, 51b, 51c, 51d: Damper mass 4, 5: Mounting member 6: Same shaft 7: 7A, 7B : Integrated connecting member 7a, 7b: Inclined connecting portion 7c: Connection portion 8, 11: Hole 9: Notch 10: Disc 12: Hole connecting portion 13: Shaft 14: Convex connecting portion 15: Concavity and convexity 16: Compression unevenness Part 17: Bridge part 50, 50c, 56: Outer pipe 52, 52a, 52b, 52c, 52d: Mount rubber 53, 53a: Rubber 54: Mounting pipe 55: Inner pipe 57: Concave groove 60: Hollow propeller shaft 61 : Shaft 62: annular groove 70, 71a: inner hole 71: cylindrical portion 72: flange portion 73: mounting bolt 74: vibrating body 75: mounting member α: integral connecting member Angle of inclination with the shaft

Claims

中空シャフト内に遊嵌するダンパーマスと、該ダンパーマス両側に位置して前記中空シャフト内に圧縮により固定する装着部材と、前記ダンパーマスと両側の装着部材とを連結する一体的連結部材とからなり、前記一体的連結部材は、両側の装着部材に前記ダンパーマスを、弾性的に且つ互いに同一軸となるように連結すると共に、前記同一軸に対して傾斜した傾斜連結部と、両側の傾斜連結部を繋ぐ接続部とからなることを特徴とするダイナミックダンパー。 A damper mass loosely fitted in the hollow shaft, a mounting member positioned on both sides of the damper mass and fixed by compression in the hollow shaft, and an integral connecting member for connecting the damper mass and the mounting members on both sides The integral connecting member connects the damper masses to the mounting members on both sides elastically and so as to have the same axis as each other, and an inclined connecting part inclined with respect to the same axis, and inclined on both sides A dynamic damper characterized by comprising a connecting portion connecting the connecting portions.

前記一体的連結部材の接続部は、前記ダンパーマスにこれの軸方向に設けた孔を通した孔接続部である請求項１記載のダイナミックダンパー。 The dynamic damper according to claim 1, wherein the connecting portion of the integral connecting member is a hole connecting portion in which a hole provided in the axial direction of the damper mass is passed.

前記一体的連結部材の接続部は、前記ダンパーマス外周面上にほぼ等間隔に渡した少なくとも５条以上の凸条接続部である請求項１記載のダイナミックダンパー。 2. The dynamic damper according to claim 1, wherein the connecting portion of the integral connecting member is at least five or more ridge connecting portions that are substantially equidistantly spaced on the outer peripheral surface of the damper mass.

隣接する前記凸条接続部同士が円周方向に帯状に形成された橋絡部によって連接されてなる請求項３記載のダイナミックダンパー。 The dynamic damper according to claim 3, wherein the adjacent protruding line connecting portions are connected by a bridging portion formed in a belt shape in the circumferential direction.

前記一体的連結部材の接続部は、前記孔接続部及び前記凸条接続部により構成した請求項１記載のダイナミックダンパー。 The dynamic damper according to claim 1, wherein the connecting portion of the integral connecting member is constituted by the hole connecting portion and the convex connecting portion.

前記一体的連結部材の傾斜連結部における前記同一軸に対する傾斜は、４５±２０度の範囲である請求項１ないし５のいずれか１項記載のダイナミックダンパー。 The dynamic damper according to any one of claims 1 to 5, wherein the inclination of the integral connecting member with respect to the same axis in the inclined connecting portion is in a range of 45 ± 20 degrees.

前記装着部材の一方の輪径が他方の装着部材の輪径よりも小径にされてなる請求項１ないし６のいずれか１項記載のダイナミックダンパー。 The dynamic damper according to any one of claims 1 to 6, wherein a diameter of one of the mounting members is smaller than a diameter of the other mounting member.

前記装着部材の中空シャフトとの接触面に、円周上等間隔に軸方向に延びている切り欠きが３箇所以上形成されてなる請求項１ないし７のいずれか１項記載のダイナミックダンパー。 The dynamic damper according to any one of claims 1 to 7, wherein three or more cutouts extending in the axial direction at equal circumferential intervals are formed on a contact surface of the mounting member with the hollow shaft.

請求項１ないし８のいずれか１項に記載のダイナミックダンパーにおける両側の前記装着部材の内側端部間に位置する前記中空シャフトに、凹凸部を設けて、該凹凸部を前記中空シャフトに前記ダイナミックダンパーを挿入する際の位置決めとしたことを特徴とする中空プロペラシャフト。 An uneven part is provided in the hollow shaft located between the inner ends of the mounting members on both sides of the dynamic damper according to any one of claims 1 to 8, and the uneven part is provided on the hollow shaft. A hollow propeller shaft characterized by positioning when a damper is inserted.

請求項１ないし８のいずれか１項に記載のダイナミックダンパーにおける両側の前記装着部材の外側端部間に位置する前記中空シャフトに、前記装着部材の外側端部間距離Ｌより短い圧縮凹凸部を設けて、前記中空シャフトに前記ダイナミックダンパーを挿入した際、前記圧縮凹凸部により同一軸に対して傾斜してなる前記一体的連結部材を圧縮するようにしたことを特徴とする中空プロペラシャフト。
A compression uneven portion shorter than a distance L between outer end portions of the mounting member is formed on the hollow shaft positioned between outer end portions of the mounting member on both sides of the dynamic damper according to any one of claims 1 to 8. The hollow propeller shaft is provided so that when the dynamic damper is inserted into the hollow shaft, the integral connecting member inclined with respect to the same axis is compressed by the compression uneven portion.