JP2008157436A - Dynamic damper and propeller shaft - Google Patents

Dynamic damper and propeller shaft Download PDF

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JP2008157436A
JP2008157436A JP2006350459A JP2006350459A JP2008157436A JP 2008157436 A JP2008157436 A JP 2008157436A JP 2006350459 A JP2006350459 A JP 2006350459A JP 2006350459 A JP2006350459 A JP 2006350459A JP 2008157436 A JP2008157436 A JP 2008157436A
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dynamic damper
weight
elastic cantilever
rubber
elastic
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Kenichi Mori
健一 森
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Showa Corp
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Showa Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To simplify a structure, improve durability and facilitate tuning of resonance frequency in a dynamic damper supporting a weight on an attachment part to a hollow shaft via an elastic body. <P>SOLUTION: The dynamic damper 10 includes the attachment part 20, an elastic cantilever 30 supporting the attachment part 20 on a center axis, and the weight 40 provided on a tip of the elastic cantilever 30. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明はダイナミックダンパ及びプロペラシャフトに関する。   The present invention relates to a dynamic damper and a propeller shaft.

自動車の動力伝達部材、例えばプロペラシャフトの振動を低減し、車体振動や騒音を低減するダイナミックダンパとして、特許文献１に記載の如く、アウタカラーの内部に配置されるウエイトと、アウタカラーとウエイトの間の環状空間内に配置されるゴム弾性体とを有してなるものがある。   As described in Patent Document 1, as a dynamic damper that reduces vibration of a power transmission member of an automobile, for example, a propeller shaft, and reduces vehicle body vibration and noise, a weight disposed inside the outer collar, Some have a rubber elastic body disposed in the annular space between them.

特許文献１に記載のダイナミックダンパでは、ゴム弾性体が環状空間の周方向複数位置に設けられるゴム足部と、相隣るゴム足部の間に設けられる空洞部とを有するものとしている。
実公平7-29324 In the dynamic damper described in Patent Document 1, the rubber elastic body has rubber feet provided at a plurality of positions in the circumferential direction of the annular space and hollow portions provided between adjacent rubber feet.
Reality 7-29324

特許文献１に記載のダイナミックダンパは、アウタカラーに対してウエイトを支持するゴム弾性体が複数のゴム足部と空洞部を有するものであり、構造が複雑である。また、ゴム弾性体の周方向に複数の空洞部を有し、相隣るゴム足部をそれらの空洞部が分断し、各ゴム足部の幅寸法を小とするから、ゴム足部のゴム切れを生じ易く、耐久性が悪い。   The dynamic damper described in Patent Document 1 has a complicated structure because a rubber elastic body that supports a weight with respect to an outer collar has a plurality of rubber feet and a cavity. In addition, since the rubber elastic body has a plurality of hollow portions in the circumferential direction, the adjacent rubber foot portions are divided by the hollow portions, and the width dimension of each rubber foot portion is reduced. It is easy to cut and has poor durability.

また、特許文献１に記載のダイナミックダンパは、ウエイトの質量やゴム弾性体のバネ定数等の調整により、共振周波数をチューニングするものとしている。ここで、ゴム弾性体のバネ定数の調整は、ゴム足部と空洞部の個数、形状等の設定替えにより行なうものであり、複雑である。   Further, the dynamic damper described in Patent Document 1 tunes the resonance frequency by adjusting the weight mass, the spring constant of the rubber elastic body, and the like. Here, the adjustment of the spring constant of the rubber elastic body is complicated by changing the settings of the number and shape of the rubber feet and the cavity.

本発明の課題は、中空シャフトに対する取付部に弾性体を介してウエイトを支持してなるダイナミックダンパにおいて、構造を簡素にするとともに、耐久性を向上し、共振周波数のチューニングを容易にすることにある。   An object of the present invention is to simplify a structure, improve durability and facilitate tuning of a resonance frequency in a dynamic damper in which a weight is supported via an elastic body at a mounting portion with respect to a hollow shaft. is there.

請求項１の発明は、取付部と、取付部の中心軸上に支持した弾性片持梁と、弾性片持梁の先端に設けたウエイトとを有してなるダイナミックダンパである。   The invention of claim 1 is a dynamic damper comprising an attachment portion, an elastic cantilever beam supported on the central axis of the attachment portion, and a weight provided at the tip of the elastic cantilever beam.

請求項２の発明は、請求項１の発明において更に、前記取付部と弾性片持梁をゴム弾性体により一体形成したものである。   According to a second aspect of the invention, in the first aspect of the invention, the attachment portion and the elastic cantilever are integrally formed of a rubber elastic body.

請求項３の発明は、請求項１の発明において更に、前記取付部を金属環にて形成し、金属環の中心軸上の中空部に弾性片持梁の基端を嵌合して固定したようにしたものである。   According to a third aspect of the invention, in the first aspect of the invention, the attachment portion is formed of a metal ring, and the base end of the elastic cantilever is fitted and fixed to the hollow portion on the central axis of the metal ring. It is what I did.

請求項４の発明は、請求項３の発明において更に、前記金属環の外周にゴム被覆材が被着されてなるようにしたものである。   According to a fourth aspect of the present invention, in the third aspect of the present invention, a rubber coating material is further adhered to the outer periphery of the metal ring.

請求項５の発明は、請求項１〜４のいずれかの発明において更に、前記ウエイトの外周にゴム被覆材が被着されてなるようにしたものである。   According to a fifth aspect of the present invention, in the first aspect of the present invention, the rubber coating material is further adhered to the outer periphery of the weight.

請求項６の発明は、請求項１〜５のいずれかに記載のダイナミックダンパを中空シャフト内に圧入して固定配置したプロペラシャフトである。   The invention of claim 6 is a propeller shaft in which the dynamic damper according to any one of claims 1 to 5 is press-fitted into a hollow shaft and fixedly arranged.

（請求項１）
(a)ダイナミックダンパは、中空シャフトに対する取付部の中心軸上に支持した弾性片持梁の先端にウエイトを設けたものであり、構造を簡素にできる。また、弾性片持梁は単一丸棒状にする等、単純断面かつ大断面化でき、耐久性を向上できる。 (Claim 1)
(a) The dynamic damper is provided with a weight at the tip of the elastic cantilever supported on the central axis of the mounting portion with respect to the hollow shaft, and the structure can be simplified. Further, the elastic cantilever can have a simple cross section and a large cross section, such as a single round bar, and durability can be improved.

(b)ダイナミックダンパは、取付部の中心軸上に支持した弾性片持梁の先端にウエイトを設けたから、弾性片持梁のバネ定数（弾性片持梁の長さ、断面サイズ）等により、共振周波数を容易に調整できる。また、弾性片持梁の先端にウエイトを設けたことにより、ウエイトの質量が比較的小さくても、ウエイトの質量や弾性片持梁のバネ定数等の調整により、ダイナミックダンパの共振周波数を低い周波数域にまで容易にチューニングできる。   (b) Since the dynamic damper is provided with a weight at the tip of the elastic cantilever supported on the central axis of the mounting portion, depending on the spring constant of the elastic cantilever (length of elastic cantilever, cross-sectional size), etc. The resonance frequency can be easily adjusted. In addition, by providing a weight at the tip of the elastic cantilever, even if the mass of the weight is relatively small, the resonance frequency of the dynamic damper can be reduced by adjusting the weight mass and the spring constant of the elastic cantilever. It can be easily tuned to the range.

（請求項２）
(c)ダイナミックダンパは、取付部と弾性片持梁をゴム弾性体により一体形成したから、構造を一層簡素にできる。 (Claim 2)
(c) The structure of the dynamic damper can be further simplified because the mounting portion and the elastic cantilever are integrally formed of a rubber elastic body.

（請求項３）
(d)ダイナミックダンパは、取付部を金属環にて形成し、金属環の中心軸上の中空部に弾性片持梁の基端を嵌合して固定したから、構造を一層簡素にできる。 (Claim 3)
(d) Since the dynamic damper has a mounting portion formed of a metal ring and the base end of the elastic cantilever is fitted and fixed to the hollow portion on the central axis of the metal ring, the structure can be further simplified.

（請求項４）
(e)ダイナミックダンパは、金属環の外周に被着したゴム被覆材の弾性変形により、中空シャフトへの圧入容易性を確保できる。 (Claim 4)
(e) The dynamic damper can secure the ease of press-fitting into the hollow shaft by the elastic deformation of the rubber covering material attached to the outer periphery of the metal ring.

（請求項５）
(f)ダイナミックダンパは、ウエイトの外周にゴム被覆材を被着したことにより、過大な振動入力により、ウエイトが中空シャフトの内面に当接するに至ったとしても、衝撃や打音の発生を軽減ないしは防止できる。 (Claim 5)
(f) The dynamic damper reduces the occurrence of impact and sound even if the weight comes in contact with the inner surface of the hollow shaft due to excessive vibration input due to the rubber coating applied to the outer periphery of the weight. Or prevent it.

（請求項６）
(g)プロペラシャフトにおいて、上述(a)〜(f)を実現できる。 (Claim 6)
(g) In the propeller shaft, the above (a) to (f) can be realized.

図１は実施例１のプロペラシャフトを示す断面図、図２はダイナミックダンパを示す断面図、図３はダイナミックダンパの断面を示し、（Ａ）は図２のＡ−Ａ線に沿う断面図、（Ｂ）は図２のＢ−Ｂ線に沿う断面図、（Ｃ）は図２のＣ−Ｃ線に沿う断面図、図４は実施例２のプロペラシャフトを示す断面図、図５はダイナミックダンパを示す断面図、図６はダイナミックダンパの断面を示し、（Ａ）は図５のＡ−Ａ線に沿う断面図、（Ｂ）は図５のＢ−Ｂ線に沿う断面図、（Ｃ）は図５のＣ−Ｃ線に沿う断面図である。   1 is a cross-sectional view showing a propeller shaft of Example 1, FIG. 2 is a cross-sectional view showing a dynamic damper, FIG. 3 is a cross-sectional view of the dynamic damper, and (A) is a cross-sectional view taken along line AA in FIG. (B) is a cross-sectional view taken along line BB in FIG. 2, (C) is a cross-sectional view taken along line CC in FIG. 2, FIG. 4 is a cross-sectional view showing the propeller shaft of Example 2, and FIG. 6 is a sectional view of the dynamic damper, FIG. 6A is a sectional view taken along the line AA in FIG. 5, FIG. 6B is a sectional view taken along the line BB in FIG. ) Is a cross-sectional view taken along the line CC of FIG.

（実施例１）（図１〜図３）
図１のダイナミックダンパ１０は、自動車用プロペラシャフト１の円筒状中空シャフト２内の軸方向所定位置に圧入して嵌挿され、固定配置されたものである。 Example 1 (FIGS. 1 to 3)
The dynamic damper 10 shown in FIG. 1 is press-fitted into a predetermined position in the axial direction of the cylindrical hollow shaft 2 of the propeller shaft 1 for an automobile and is fixedly arranged.

ダイナミックダンパ１０は、図２、図３に示す如く、取付部２０と、取付部２０の中心軸上に支持した弾性片持梁３０と、弾性片持梁３０の先端に設けたウエイト４０とを有して構成される。ダイナミックダンパ１０は、中空シャフト２の内面に固定配置した取付部２０に対し弾性片持梁３０を介してウエイト４０を片持支持する状態で、プロペラシャフト１の振動周波数に応じて、弾性片持梁３０のバネ定数やウエイト４０の質量をチューニングすることにより、プロペラシャフト１の共振作用に起因する振動を吸収、低減し、車体振動や騒音を低減する。   2 and 3, the dynamic damper 10 includes an attachment portion 20, an elastic cantilever 30 supported on the central axis of the attachment portion 20, and a weight 40 provided at the tip of the elastic cantilever 30. It is configured. The dynamic damper 10 is an elastic cantilever according to the vibration frequency of the propeller shaft 1 in a state where the weight 40 is cantilevered via the elastic cantilever 30 with respect to the mounting portion 20 fixedly disposed on the inner surface of the hollow shaft 2. By tuning the spring constant of the beam 30 and the mass of the weight 40, vibration caused by the resonance action of the propeller shaft 1 is absorbed and reduced, and vehicle body vibration and noise are reduced.

取付部２０は短円柱状のゴム弾性体からなり、中空シャフト２に圧入されて中空シャフト２の内面に固定配置される。   The attachment portion 20 is made of a short cylindrical rubber elastic body, and is press-fitted into the hollow shaft 2 and fixedly disposed on the inner surface of the hollow shaft 2.

弾性片持梁３０は取付部２０と一体成形されたゴム弾性体からなり、取付部２０より小径の棒状をなす。弾性片持梁３０の基端は取付部２０に一体結合し、取付部２０から中心軸上を外方に突出する弾性片持梁３０の先端にウエイト４０を保持する。   The elastic cantilever 30 is made of a rubber elastic body formed integrally with the mounting portion 20 and has a rod shape smaller in diameter than the mounting portion 20. The base end of the elastic cantilever 30 is integrally coupled to the attachment portion 20, and the weight 40 is held at the distal end of the elastic cantilever 30 protruding outward from the attachment portion 20 on the central axis.

ウエイト４０は円柱等の短柱状をなし、棒鋼等の金属棒からなる。ウエイト４０は、取付部２０及び弾性片持梁３０と同軸配置される。ウエイト４０は弾性片持梁３０より大径とされる。ウエイト４０の外周及び端面の全外面にはゴム被覆材５０が被着され、ゴム被覆材５０は取付部２０及び弾性片持梁３０と一体成形される。   The weight 40 has a short column shape such as a cylinder and is made of a metal bar such as a steel bar. The weight 40 is arranged coaxially with the mounting portion 20 and the elastic cantilever 30. The weight 40 has a larger diameter than the elastic cantilever 30. A rubber coating material 50 is attached to the outer periphery and the entire outer surface of the weight 40, and the rubber coating material 50 is integrally formed with the mounting portion 20 and the elastic cantilever 30.

ダイナミックダンパ１０は、複数の金型により形成されるキャビティ内にウエイト４０を位置決めして配置し、このキャビティにゴムを充填し、取付部２０、弾性片持梁３０及びゴム被覆材５０をウエイト４０に一体成形することにて加硫形成して製造される。   The dynamic damper 10 positions and arranges a weight 40 in a cavity formed by a plurality of molds, fills the cavity with rubber, and attaches the mounting portion 20, the elastic cantilever 30, and the rubber coating material 50 to the weight 40. It is manufactured by vulcanization forming by integrally molding the resin.

本実施例によれば以下の作用効果を奏する。
(a)ダイナミックダンパ１０は、中空シャフト２に対する取付部２０の中心軸上に支持した弾性片持梁３０の先端にウエイト４０を設けたものであり、構造を簡素にできる。また、弾性片持梁３０は単一丸棒状にする等、単純断面かつ大断面化でき、耐久性を向上できる。 According to the present embodiment, the following operational effects can be obtained.
(a) The dynamic damper 10 is provided with a weight 40 at the tip of the elastic cantilever 30 supported on the central axis of the mounting portion 20 with respect to the hollow shaft 2, and the structure can be simplified. Further, the elastic cantilever 30 can have a simple cross section and a large cross section, such as a single round bar, and the durability can be improved.

(b)ダイナミックダンパ１０は、取付部２０の中心軸上に支持した弾性片持梁３０の先端にウエイト４０を設けたから、弾性片持梁３０のバネ定数（弾性片持梁３０の長さ、断面サイズ）等により、共振周波数を容易に調整できる。また、弾性片持梁３０の先端にウエイト４０を設けたことにより、ウエイト４０の質量が比較的小さくても、ウエイト４０の質量や弾性片持梁３０のバネ定数等の調整により、ダイナミックダンパ１０の共振周波数を低い周波数域にまで容易にチューニングできる。   (b) Since the dynamic damper 10 is provided with the weight 40 at the tip of the elastic cantilever 30 supported on the central axis of the mounting portion 20, the spring constant of the elastic cantilever 30 (the length of the elastic cantilever 30, The resonance frequency can be easily adjusted by the cross-sectional size. Further, since the weight 40 is provided at the tip of the elastic cantilever 30, the dynamic damper 10 can be adjusted by adjusting the weight 40, the spring constant of the elastic cantilever 30, etc. even if the weight 40 is relatively small. Can be easily tuned to a low frequency range.

(c)ダイナミックダンパ１０は、取付部２０と弾性片持梁３０をゴム弾性体により一体形成したから、構造を一層簡素にできる。   (c) Since the dynamic damper 10 has the mounting portion 20 and the elastic cantilever 30 integrally formed of a rubber elastic body, the structure can be further simplified.

(d)ダイナミックダンパ１０は、ウエイト４０の外周にゴム被覆材５０を被着したことにより、過大な振動入力により、ウエイト４０が中空シャフト２の内面に当接するに至ったとしても、衝撃や打音の発生を軽減ないしは防止できる。   (d) Since the dynamic damper 10 has the rubber coating 50 attached to the outer periphery of the weight 40, even if the weight 40 comes into contact with the inner surface of the hollow shaft 2 due to excessive vibration input, Sound generation can be reduced or prevented.

(e)プロペラシャフト１において、上述(a)〜(d)を実現できる。   (e) In the propeller shaft 1, the above-mentioned (a) to (d) can be realized.

（実施例２）（図４〜図６）
図４は、プロペラシャフト１の中空シャフト２内にダイナミックダンパ１１０を固定配置したものである。ダイナミックダンパ１１０は、図５、図６に示す如く、取付部１２０と、取付部１２０の中心軸上に支持した弾性片持梁１３０と、弾性片持梁１３０の先端に設けたウエイト１４０とを有して構成される。ダイナミックダンパ１１０は、中空シャフト２の内面に固定配置した取付部１２０に対し弾性片持梁１３０を介してウエイト１４０を片持支持する状態で、プロペラシャフト１の振動周波数に応じて、弾性片持梁１３０のバネ定数やウエイト１４０の質量をチューニングすることにより、プロペラシャフト１の共振作用に起因する振動を吸収、低減し、車体振動や騒音を低減する。 Example 2 (FIGS. 4 to 6)
FIG. 4 shows a configuration in which a dynamic damper 110 is fixedly arranged in the hollow shaft 2 of the propeller shaft 1. As shown in FIGS. 5 and 6, the dynamic damper 110 includes an attachment portion 120, an elastic cantilever 130 supported on the central axis of the attachment portion 120, and a weight 140 provided at the tip of the elastic cantilever 130. It is configured. The dynamic damper 110 is an elastic cantilever according to the vibration frequency of the propeller shaft 1 in a state where the weight 140 is cantilevered via the elastic cantilever 130 with respect to the mounting portion 120 fixedly disposed on the inner surface of the hollow shaft 2. By tuning the spring constant of the beam 130 and the mass of the weight 140, vibration caused by the resonance action of the propeller shaft 1 is absorbed and reduced, and vehicle body vibration and noise are reduced.

取付部１２０は、金属環１２１にて形成される。金属環１２１は、ばね鋼板等の金属板を曲げ加工もしくは絞り加工した成形体であり、内筒部１２１Ａと、内筒部１２１Ａと同軸をなす外筒部１２１Ｂと、内筒部１２１Ａと外筒部１２１Ｂの一端間に連続するつなぎ板部１２１Ｃとを備え、内筒部１２１Ａと外筒部１２１Ｂの間に外部開放の環状空洞部１２１Ｄを形成し、内筒部１２１Ａの内側に中空部１２１Ｅを形成する。取付部１２０は、金属環１２１の中心軸上の中空部１２１Ｅに弾性片持梁１３０の基端を圧入嵌合して固定する。   The attachment portion 120 is formed by a metal ring 121. The metal ring 121 is a molded body obtained by bending or drawing a metal plate such as a spring steel plate, and includes an inner cylinder part 121A, an outer cylinder part 121B coaxial with the inner cylinder part 121A, an inner cylinder part 121A, and an outer cylinder. A connecting plate part 121C continuous between one end of the part 121B, an externally open annular cavity 121D is formed between the inner cylinder part 121A and the outer cylinder part 121B, and a hollow part 121E is formed inside the inner cylinder part 121A Form. The mounting portion 120 is fixed by press-fitting and fixing the proximal end of the elastic cantilever 130 to the hollow portion 121E on the central axis of the metal ring 121.

取付部１２０は、金属環１２１の外筒部１２１Ｂの外周にゴム被覆材１２２が被着される。取付部１２０は、金属環１２１のゴム被覆材１２２を中空シャフト２に圧入されて中空シャフト２の内面に固定配置される。   The attachment portion 120 has a rubber covering material 122 attached to the outer periphery of the outer cylinder portion 121 </ b> B of the metal ring 121. The mounting portion 120 is fixedly disposed on the inner surface of the hollow shaft 2 by press-fitting the rubber covering material 122 of the metal ring 121 into the hollow shaft 2.

弾性片持梁１３０は短円柱状のゴム弾性体からなる。弾性片持梁１３０の基端が取付部１２０の中空部１２１Ｅに圧入されて固定配置される。取付部１２０の中空部１２１Ｅから中心軸上を外方に突出する弾性片持梁１３０の先端にウエイト１４０を保持する。   The elastic cantilever 130 is made of a short cylindrical rubber elastic body. The base end of the elastic cantilever 130 is press-fitted into the hollow portion 121E of the mounting portion 120 and fixedly arranged. The weight 140 is held at the tip of the elastic cantilever 130 protruding outward from the hollow portion 121E of the mounting portion 120 on the central axis.

ウエイト１４０は円柱等の短柱状をなし、棒鋼等の金属棒からなる。ウエイト１４０は、取付部１２０及び弾性片持梁１３０と同軸配置される。ウエイト１４０は弾性片持梁１３０より大径とされる。ウエイト１４０の外周及び端面の全外面にはゴム被覆材１５０が被着され、ゴム被覆材１５０は取付部１２０及び弾性片持梁１３０と一体成形される。   The weight 140 has a short column shape such as a cylinder and is made of a metal bar such as a steel bar. The weight 140 is disposed coaxially with the mounting portion 120 and the elastic cantilever 130. The weight 140 has a larger diameter than the elastic cantilever 130. A rubber coating 150 is attached to the outer periphery and all outer surfaces of the weight 140, and the rubber coating 150 is integrally formed with the mounting portion 120 and the elastic cantilever 130.

ダイナミックダンパ１１０は、複数の金型により形成されるキャビティ内にウエイト１４０を配置し、このキャビティにゴムを充填し、取付部１２０、弾性片持梁１３０及びゴム被覆材１５０をウエイト１４０に一体成形することにて加硫形成して製造される。   In the dynamic damper 110, a weight 140 is disposed in a cavity formed by a plurality of molds, the cavity is filled with rubber, and the mounting portion 120, the elastic cantilever 130, and the rubber covering material 150 are integrally formed in the weight 140. Thus, it is manufactured by vulcanization formation.

本実施例によれば以下の作用効果を奏する。
(a)ダイナミックダンパ１１０は、中空シャフト２に対する取付部１２０の中心軸上に支持した弾性片持梁１３０の先端にウエイト１４０を設けたものであり、構造を簡素にできる。また、弾性片持梁１３０は単一丸棒状にする等、単純断面かつ大断面化でき、耐久性を向上できる。 According to the present embodiment, the following operational effects can be obtained.
(a) The dynamic damper 110 is provided with the weight 140 at the tip of the elastic cantilever 130 supported on the central axis of the mounting portion 120 with respect to the hollow shaft 2, and the structure can be simplified. Further, the elastic cantilever 130 can have a simple cross section and a large cross section, such as a single round bar, and the durability can be improved.

(b)ダイナミックダンパ１１０は、取付部１２０の中心軸上に支持した弾性片持梁１３０の先端にウエイト１４０を設けたから、弾性片持梁１３０のバネ定数（弾性片持梁１３０の長さ、断面サイズ）等により、共振周波数を容易に調整できる。また、弾性片持梁１３０の先端にウエイト１４０を設けたことにより、ウエイト１４０の質量が比較的小さくても、ウエイト１４０の質量や弾性片持梁１３０のバネ定数等の調整により、ダイナミックダンパ１１０の共振周波数を低い周波数域にまで容易にチューニングできる。   (b) Since the dynamic damper 110 is provided with the weight 140 at the tip of the elastic cantilever 130 supported on the central axis of the mounting portion 120, the spring constant of the elastic cantilever 130 (the length of the elastic cantilever 130, The resonance frequency can be easily adjusted by the cross-sectional size. Further, by providing the weight 140 at the tip of the elastic cantilever 130, the dynamic damper 110 can be adjusted by adjusting the mass of the weight 140, the spring constant of the elastic cantilever 130, etc. even if the weight 140 is relatively small. Can be easily tuned to a low frequency range.

(c)ダイナミックダンパ１１０は、取付部１２０を金属環１２１にて形成し、金属環１２１の中心軸上の中空部１２１Ｅに弾性片持梁１３０の基端を嵌合して固定したから、構造を一層簡素にできる。   (c) The dynamic damper 110 has a structure in which the mounting portion 120 is formed by the metal ring 121 and the base end of the elastic cantilever 130 is fitted and fixed to the hollow portion 121E on the central axis of the metal ring 121. Can be further simplified.

(d)ダイナミックダンパ１１０は、金属環１２１の外周に被着したゴム被覆材１２２の弾性変形により、中空シャフト２への圧入容易性を確保できる。   (d) The dynamic damper 110 can ensure the ease of press-fitting into the hollow shaft 2 by the elastic deformation of the rubber covering material 122 attached to the outer periphery of the metal ring 121.

(e)ダイナミックダンパ１１０は、ウエイト１４０の外周にゴム被覆材１５０を被着したことにより、過大な振動入力により、ウエイト１４０が中空シャフト２の内面に当接するに至ったとしても、衝撃や打音の発生を軽減ないしは防止できる。   (e) Even if the weight 140 comes into contact with the inner surface of the hollow shaft 2 due to excessive vibration input due to the rubber coating material 150 being applied to the outer periphery of the weight 140, the dynamic damper 110 is not affected by impact or impact. Sound generation can be reduced or prevented.

(f)プロペラシャフト１において、上述(a)〜(e)を実現できる。   (f) In the propeller shaft 1, the above-described (a) to (e) can be realized.

以上、本発明の実施例を図面により詳述したが、本発明の具体的な構成はこの実施例に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。   Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to these embodiments, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

図１は実施例１のプロペラシャフトを示す断面図である。FIG. 1 is a cross-sectional view showing a propeller shaft according to a first embodiment. 図２はダイナミックダンパを示す断面図である。FIG. 2 is a sectional view showing the dynamic damper. 図３はダイナミックダンパの断面を示し、（Ａ）は図２のＡ−Ａ線に沿う断面図、（Ｂ）は図２のＢ−Ｂ線に沿う断面図、（Ｃ）は図２のＣ−Ｃ線に沿う断面図である。3 shows a cross-section of the dynamic damper, (A) is a cross-sectional view taken along line AA in FIG. 2, (B) is a cross-sectional view taken along line BB in FIG. 2, and (C) is C in FIG. It is sectional drawing which follows the -C line. 図４は実施例２のプロペラシャフトを示す断面図である。FIG. 4 is a cross-sectional view showing the propeller shaft of the second embodiment. 図５はダイナミックダンパを示す断面図である。FIG. 5 is a cross-sectional view showing the dynamic damper. 図６はダイナミックダンパの断面を示し、（Ａ）は図５のＡ−Ａ線に沿う断面図、（Ｂ）は図５のＢ−Ｂ線に沿う断面図、（Ｃ）は図５のＣ−Ｃ線に沿う断面図である。6 shows a cross section of the dynamic damper, (A) is a cross sectional view taken along line AA in FIG. 5, (B) is a cross sectional view taken along line BB in FIG. 5, and (C) is C in FIG. It is sectional drawing which follows the -C line.

符号の説明Explanation of symbols

１ プロペラシャフト
２ 中空シャフト
１０、１１０ ダイナミックダンパ
２０、１２０ 取付部
３０、１３０ 弾性片持梁
４０、１４０ ウエイト
５０、１５０ ゴム被覆材
１２１ 金属環
１２１Ｅ 中空部
１２２ ゴム被覆材 DESCRIPTION OF SYMBOLS 1 Propeller shaft 2 Hollow shaft 10, 110 Dynamic damper 20, 120 Mounting part 30, 130 Elastic cantilever 40, 140 Weight 50, 150 Rubber coating material 121 Metal ring 121E Hollow part 122 Rubber coating material

Claims (6)

取付部と、取付部の中心軸上に支持した弾性片持梁と、弾性片持梁の先端に設けたウエイトとを有してなるダイナミックダンパ。   A dynamic damper comprising: an attachment portion; an elastic cantilever supported on the central axis of the attachment portion; and a weight provided at a tip of the elastic cantilever. 前記取付部と弾性片持梁をゴム弾性体により一体形成した請求項１に記載のダイナミックダンパ。   The dynamic damper according to claim 1, wherein the attachment portion and the elastic cantilever are integrally formed of a rubber elastic body. 前記取付部を金属環にて形成し、金属環の中心軸上の中空部に弾性片持梁の基端を嵌合して固定した請求項１に記載のダイナミックダンパ。   The dynamic damper according to claim 1, wherein the attachment portion is formed of a metal ring, and a base end of an elastic cantilever is fitted and fixed to a hollow portion on a central axis of the metal ring. 前記金属環の外周にゴム被覆材が被着されてなる請求項３に記載のダイナミックダンパ。   The dynamic damper according to claim 3, wherein a rubber coating material is attached to an outer periphery of the metal ring. 前記ウエイトの外周にゴム被覆材が被着されてなる請求項１〜４のいずれかに記載のダイナミックダンパ。   The dynamic damper according to any one of claims 1 to 4, wherein a rubber coating material is attached to an outer periphery of the weight. 請求項１〜５のいずれかに記載のダイナミックダンパを中空シャフト内に圧入して固定配置したプロペラシャフト。   A propeller shaft in which the dynamic damper according to any one of claims 1 to 5 is press-fitted into a hollow shaft and fixedly arranged.
JP2006350459A 2006-12-26 2006-12-26 Dynamic damper and propeller shaft Withdrawn JP2008157436A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014009718A (en) * 2012-06-28 2014-01-20 Nok Corp Dynamic damper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014009718A (en) * 2012-06-28 2014-01-20 Nok Corp Dynamic damper

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