JPH11287310A - Friction damper - Google Patents
Friction damperInfo
- Publication number
- JPH11287310A JPH11287310A JP9130898A JP9130898A JPH11287310A JP H11287310 A JPH11287310 A JP H11287310A JP 9130898 A JP9130898 A JP 9130898A JP 9130898 A JP9130898 A JP 9130898A JP H11287310 A JPH11287310 A JP H11287310A
- Authority
- JP
- Japan
- Prior art keywords
- friction damper
- elastic body
- contact
- peripheral surface
- free end
- 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.)
- Pending
Links
Landscapes
- Gears, Cams (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、フリクションダン
パに関する。このフリクションダンパは、例えば自動車
の変速機などでの振動抑制に用いられる。[0001] The present invention relates to a friction damper. The friction damper is used, for example, for suppressing vibration in a transmission of an automobile.
【０００２】[0002]
【従来の技術】例えば自動車の変速機には、エンジンの
クランク軸に常時連動して回転する歯車と、この歯車を
回転自在に支持する歯車軸とがあり、例えば２５０〜７
５０ｒｐｍなどの低速回転域において、いわゆるラトル
音と呼ばれる歯車の噛合打音が発生する。このラトル音
の発生を抑えるために、フリクションダンパが用いられ
る。2. Description of the Related Art For example, a transmission of an automobile includes a gear that rotates constantly in association with a crankshaft of an engine and a gear shaft that rotatably supports the gear.
In a low-speed rotation range such as 50 rpm, a so-called rattling sound of gear meshing and striking occurs. A friction damper is used to suppress the generation of the rattle sound.
【０００３】図６は、フリクションダンパの正面図であ
る。図中、３０はフリクションダンパの全体を示してい
る。このフリクションダンパ３０は、円筒形の環状芯金
３１と、環状芯金３１の外周に片持ち状態に被着される
ゴムなどの弾性体３２とで構成されている。弾性体３２
の内周の円周数カ所には、半円形の切欠き３３が設けら
れている。この切欠き３３は、フリクションダンパ３０
の軸方向両側の潤滑油流通を許容するために設けられて
いる。また、弾性体３２の内周面は、付け根側（環状芯
金３１側）から自由端側へ向けて縮径する円錐形状に形
成されており、径方向途中領域が付け根側へ向けて凹ま
されている。FIG. 6 is a front view of a friction damper. In the figure, reference numeral 30 denotes the entire friction damper. The friction damper 30 includes a cylindrical annular core 31 and an elastic body 32 such as rubber, which is attached to the outer periphery of the annular core 31 in a cantilever manner. Elastic body 32
A semicircular notch 33 is provided at several places on the inner circumference of. The notch 33 is provided in the friction damper 30.
Are provided to allow the lubricating oil to flow on both sides in the axial direction. The inner peripheral surface of the elastic body 32 is formed in a conical shape whose diameter decreases from the base side (the annular core 31 side) to the free end side, and a radially intermediate region is recessed toward the base side. ing.
【０００４】このフリクションダンパ３０は、例えば環
状芯金３１が歯車などの外側環体３５の内周面に外嵌固
定されて、弾性体３２が歯車軸などの内側環体３６の外
周面に対し径方向より撓んだ状態で接触させられ、この
弾性体３２により内側環体３６に対して適度の回転抵抗
を与えることで、内側環体３６のがたを無くすようにし
ている。In this friction damper 30, for example, an annular core metal 31 is externally fitted and fixed to an inner peripheral surface of an outer annular body 35 such as a gear, and an elastic body 32 is fixed to an outer peripheral surface of an inner annular body 36 such as a gear shaft. The inner ring 36 is contacted in a state where it is bent from the radial direction, and the elastic body 32 gives an appropriate rotational resistance to the inner ring 36, thereby eliminating the play of the inner ring 36.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上記フリク
ションダンパ３０は、その弾性体３２が内側環体３６の
外周面に対して撓んだ状態で接触させられており、弾性
体３２の自由端側が内側環体３６に対して密着してい
る。The friction damper 30 is in contact with the elastic body 32 in a state where the elastic body 32 is bent with respect to the outer peripheral surface of the inner ring body 36, and the free end side of the elastic body 32 is It is in close contact with the inner ring 36.
【０００６】ところで、図７に示すように、内側環体３
６の外径寸法が２段でそれらの境界部分がテーパ面３７
になっている場合では、フリクションダンパ３０の弾性
体３２の自由端が前記テーパ面３７に乗り上げないよう
に配置する必要がある。なぜなら、弾性体３２のしめし
ろは、内側環体３６の外径寸法の大小に応じて変化する
ため、上述しているようにテーパ面３７に弾性体３２の
自由端が乗り上げた状態では、当然ながら、その部分の
弾性体３２の反発弾性力が強くなって内側環体３６に付
与する回転抵抗が設計どおりにならなくなる。By the way, as shown in FIG.
6 have two outer diameters and their boundary portions are tapered surfaces 37.
In this case, it is necessary to arrange the friction damper 30 so that the free end of the elastic body 32 does not ride on the tapered surface 37. This is because the interference of the elastic body 32 changes according to the size of the outer diameter of the inner ring body 36. Therefore, in a state where the free end of the elastic body 32 rides on the tapered surface 37 as described above, it is natural. However, the repulsive elastic force of the elastic body 32 at that portion becomes strong, and the rotational resistance applied to the inner ring body 36 does not become as designed.
【０００７】このような場合、その弾性体３２の自由端
が前記テーパ面３７に乗り上げないような位置にフリク
ションダンパ３０をずらして組み込むことが望ましい
が、スペース的な問題により外側環体３５に対するフリ
クションダンパ３０の組み込み位置を軸方向にずらすこ
とができない場合だと、上述したように弾性体３２の自
由端がテーパ面３７に乗り上げた状態とならざるを得
ず、結果的に適正な回転抵抗を付与できなくなると言え
る。In such a case, it is desirable to displace the friction damper 30 at a position where the free end of the elastic body 32 does not ride on the tapered surface 37. If the installation position of the damper 30 cannot be shifted in the axial direction, the free end of the elastic body 32 must ride on the tapered surface 37 as described above, and as a result, appropriate rotation resistance is reduced. It can be said that it cannot be given.
【０００８】したがって、本発明は、フリクションダン
パにおいて、回転抵抗の付与対象の形状が特異な場合で
も、その組み込み形態を変えることなく、適正な回転抵
抗を付与できるようにすることを目的とする。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a friction damper capable of imparting an appropriate rotational resistance without changing the assembled form, even if the object to which the rotational resistance is applied is unique.
【０００９】[0009]
【課題を解決するための手段】本発明の請求項１のフリ
クションダンパは、径方向内外に配置される二つの環体
間に設けられるもので、一方環体に嵌合される環状芯金
と、この環状芯金に被着されかつ他方環体の周面に対し
径方向に撓んだ状態で接触させられる弾性体とを備え、
前記弾性体において前記他方環体と接触する領域が、円
錐形状に形成されていて、この弾性体の自由端側に、当
該弾性体と前記他方環体とが接触した状態において他方
環体の周面から浮き上がる面が設けられている。According to a first aspect of the present invention, there is provided a friction damper provided between two annular members disposed radially inward and outward. An elastic body that is attached to the annular core metal and is brought into contact with the peripheral surface of the other annular body in a radially bent state,
A region of the elastic body that comes into contact with the other ring is formed in a conical shape, and a free end side of the elastic body is provided around the periphery of the other ring in a state where the elastic body is in contact with the other ring. A surface that rises from the surface is provided.
【００１０】本発明の請求項２のフリクションダンパ
は、上記請求項１において、前記弾性体の自由端側に設
けられる面は、他方環体の軸線に沿う円筒面とされてい
る。According to a second aspect of the present invention, in the friction damper according to the first aspect, the surface provided on the free end side of the elastic body is a cylindrical surface along the axis of the other annular body.
【００１１】以上、本発明のフリクションダンパでは、
弾性体を他方環体に接触させた状態において、弾性体の
自由端側が他方環体の周面から浮き上がる形態になるか
ら、例えば他方環体の径寸法が２段でそれらの境界部分
がテーパ面になっている場合において、フリクションダ
ンパを、その弾性体の自由端が前記テーパ面に対して軸
方向で重なる位置に組み込み配置したときでも、弾性体
の自由端が浮き上がることでテーパ面に対して非接触と
なり、フリクションダンパによる回転抵抗が設計どおり
になる。As described above, in the friction damper of the present invention,
In a state where the elastic body is in contact with the other ring, the free end side of the elastic body rises from the peripheral surface of the other ring, so that, for example, the diameter of the other ring is two steps, and the boundary between them is tapered. In the case of, even when the friction damper is installed and disposed at a position where the free end of the elastic body overlaps the tapered surface in the axial direction, the free end of the elastic body floats to the tapered surface. It becomes non-contact, and the rotational resistance by the friction damper becomes as designed.
【００１２】[0012]
【発明の実施の形態】本発明の詳細を図１ないし図５に
示す実施例に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described with reference to the embodiments shown in FIGS.
【００１３】図１ないし図３は本発明の一実施形態にか
かり、図１は、フリクションダンパの縦断側面図、図２
は、フリクションダンパの正面図、図３は、フリクショ
ンダンパの使用状態を示す縦断側面図である。FIGS. 1 to 3 relate to an embodiment of the present invention. FIG. 1 is a longitudinal sectional side view of a friction damper, and FIG.
Is a front view of the friction damper, and FIG. 3 is a vertical sectional side view showing a use state of the friction damper.
【００１４】図中、１はフリクションダンパの全体を示
している。このフリクションダンパ１は、環状芯金２
と、環状芯金２に被着されるフッ素系ゴムなどの弾性体
３とで構成されている。In FIG. 1, reference numeral 1 denotes an entire friction damper. This friction damper 1 has an annular core 2
And an elastic body 3 such as a fluorine-based rubber adhered to the annular cored bar 2.
【００１５】環状芯金２は、円筒部４と、円筒部４の一
方軸端から径方向内向きに延びる環状板部５とからな
る。The annular core 2 includes a cylindrical portion 4 and an annular plate portion 5 extending radially inward from one axial end of the cylindrical portion 4.
【００１６】弾性体３は、環状芯金２の円筒部４の内周
面から環状板部５の一側面にまたがって被着されてお
り、弾性体３の内周の円周数カ所には、軸方向での潤滑
油の流通を許容するための半円形の切欠き６が設けられ
ている。この弾性体３の内周面は、付け根側（環状芯金
２側）から自由端側へ向けて縮径する円錐形状に形成さ
れており、この円錐形状の内周面の自由端側に円筒面７
が形成されている。さらに、弾性体３の径方向途中領域
は、環状板部５側へ向けて凹まされていて、それにより
弾性体３の内周の自由端側に輪状に突出するリップ８が
形成されるようになっている。このリップ８の先端の断
面は、半円形にと丸くなっている。The elastic body 3 is attached from the inner peripheral surface of the cylindrical portion 4 of the annular cored bar 2 to one side surface of the annular plate portion 5. A semicircular notch 6 is provided for allowing the lubricating oil to flow in the axial direction. The inner peripheral surface of the elastic body 3 is formed in a conical shape whose diameter decreases from the base side (the annular core 2 side) to the free end side, and a cylindrical shape is formed on the free end side of the conical inner peripheral surface. Face 7
Are formed. Further, a radially intermediate region of the elastic body 3 is recessed toward the annular plate portion 5 so that a lip 8 protruding in a ring shape is formed on the free end side of the inner periphery of the elastic body 3. Has become. The tip of the lip 8 has a semi-circular cross section.
【００１７】このフリクションダンパ１は、その環状芯
金２が外側環体１０に圧入嵌合され、弾性体３の内周面
の円錐形状部分が内側環体１１の外周面に対し撓んだ状
態で接触させられる。この弾性体３の撓みに伴う反発弾
性力でもって内側環体１１に回転抵抗が付与される。The friction damper 1 is in a state in which the annular core 2 is press-fitted into the outer ring 10, and the conical portion of the inner peripheral surface of the elastic body 3 is bent with respect to the outer peripheral surface of the inner annular body 11. Contact. Rotational resistance is applied to the inner ring body 11 by the repulsive elastic force accompanying the bending of the elastic body 3.
【００１８】そして、本発明のフリクションダンパ１の
ように、弾性体３の円錐形状の内周面の自由端側に円筒
面７を形成していれば、弾性体３を撓ませて内側環体１
１の外周面に接触させた状態のとき、図３に示すよう
に、円筒面７が内側環体１１の外周面に対して斜めにな
って浮き上がることになる。このため、例えば内側環体
１１の外径が図３に示すように２段でそれらの境界部分
がテーパ面１２になっている場合でも、フリクションダ
ンパ１の弾性体３の自由端が浮き上がることでテーパ面
１２に対して非接触となり、フリクションダンパ１によ
る回転抵抗が設計どおりになる。このため、フリクショ
ンダンパ１の軸方向での組み込み位置を変更して、弾性
体３の自由端を前記テーパ面１２に重ならないようにす
る必要がない。したがって、フリクションダンパ１の組
み込み位置を変更するだけのスペースがない場合に、有
効となる。If the cylindrical surface 7 is formed on the free end side of the conical inner peripheral surface of the elastic body 3 as in the friction damper 1 of the present invention, the elastic body 3 is bent to form the inner ring body. 1
When the outer peripheral surface of the inner ring 11 is in contact with the outer peripheral surface of the inner ring 11, the cylindrical surface 7 floats up as shown in FIG. 3. Therefore, for example, even when the outer diameter of the inner ring body 11 is two steps as shown in FIG. 3 and the boundary portion thereof is a tapered surface 12, the free end of the elastic body 3 of the friction damper 1 rises. The contact with the tapered surface 12 is eliminated, and the rotational resistance by the friction damper 1 becomes as designed. For this reason, it is not necessary to change the installation position of the friction damper 1 in the axial direction so that the free end of the elastic body 3 does not overlap the tapered surface 12. Therefore, this is effective when there is no space for changing the mounting position of the friction damper 1.
【００１９】ところで、上記フリクションダンパ１の場
合、例えば弾性体３の軸方向の厚みを大小変化させるこ
とにより、内側環体１１に対して付与する回転抵抗を調
節することができる。In the case of the friction damper 1, for example, the rotational resistance applied to the inner ring body 11 can be adjusted by changing the thickness of the elastic body 3 in the axial direction.
【００２０】なお、本発明は上記実施形態のみに限定さ
れるものではなく、種々な応用や変形が考えられる。It should be noted that the present invention is not limited to only the above embodiment, and various applications and modifications are conceivable.
【００２１】（１） 例えば、図４に示すように、径方
向寸法の小さいフリクションダンパ１であっても、弾性
体３の円錐形状の内周面に円筒面７を設けることができ
る。この場合、図５に示すように、内側環体１１の外周
面に弾性体３を撓んだ状態で接触させたときに、円筒面
７が斜めに浮き上がることになり、上記実施形態と同様
の作用、効果が得られる。(1) For example, as shown in FIG. 4, even with the friction damper 1 having a small radial dimension, the cylindrical surface 7 can be provided on the conical inner peripheral surface of the elastic body 3. In this case, as shown in FIG. 5, when the elastic body 3 is brought into contact with the outer peripheral surface of the inner ring body 11 in a bent state, the cylindrical surface 7 rises obliquely, which is the same as in the above embodiment. Functions and effects can be obtained.
【００２２】（２） 上記実施形態でのフリクションダ
ンパ１は、その弾性体３を内側環体１１に対して接触さ
せる形態としているが、弾性体３を外側環体１０に対し
て接触させる形態としたものも本発明に含まれる。この
場合、例えば図１や図４に示すフリクションダンパ１を
径方向内外を逆転させた形状とすればよい。また、環状
芯金２の形状や弾性体３の形状についても特に限定され
るものではない。(2) The friction damper 1 in the above embodiment has a configuration in which the elastic body 3 is brought into contact with the inner ring 11, and a form in which the elastic body 3 is brought into contact with the outer ring 10. What is done is also included in the present invention. In this case, for example, the friction damper 1 shown in FIGS. 1 and 4 may have a shape in which the inside and outside in the radial direction are reversed. Further, the shape of the annular core 2 and the shape of the elastic body 3 are not particularly limited.
【００２３】[0023]
【発明の効果】請求項１，２の発明では、例えば回転抵
抗付与対象の径寸法が２段でその境界部分がテーパ面に
なっているような特異な形状であって、このテーパ面に
弾性体の自由端側が軸方向で重なる位置に組み込まれた
ときでも、前記テーパ面に対して弾性体の自由端側を非
接触にできるから、回転抵抗を設計どおりに付与するこ
とができる。これにより、フリクションダンパの軸方向
での組み込み位置を変更して、弾性体の自由端を前記テ
ーパ面に重ならないようにする必要がないし、また、ス
ペース的な問題よりフリクションダンパの組み込み位置
を変更することができない場合に、有効となる。According to the first and second aspects of the present invention, for example, the rotational resistance imparting object has a unique shape in which the diameter dimension is two steps and the boundary portion is a tapered surface. Even when the free end side of the body is installed at a position where the free end side overlaps in the axial direction, the free end side of the elastic body can be kept out of contact with the tapered surface, so that rotational resistance can be provided as designed. This eliminates the need to change the mounting position of the friction damper in the axial direction so that the free end of the elastic body does not overlap the tapered surface, and also changes the mounting position of the friction damper due to space issues. It is effective when it cannot be done.
【図１】本発明の一実施形態のフリクションダンパの縦
断側面図FIG. 1 is a longitudinal sectional side view of a friction damper according to an embodiment of the present invention.
【図２】同実施形態のフリクションダンパの正面図FIG. 2 is a front view of the friction damper of the embodiment.
【図３】同実施形態のフリクションダンパの使用状態を
示す縦断側面図FIG. 3 is a longitudinal sectional side view showing a use state of the friction damper of the embodiment.
【図４】本発明の他の実施形態のフリクションダンパの
縦断側面図FIG. 4 is a longitudinal sectional side view of a friction damper according to another embodiment of the present invention.
【図５】図４のフリクションダンパで、図３対応図5 is a view corresponding to FIG. 3 with the friction damper of FIG. 4;
【図６】従来例のフリクションダンパの縦断側面図FIG. 6 is a longitudinal sectional side view of a conventional friction damper.
【図７】従来例のフリクションダンパの使用状態を示す
縦断側面図FIG. 7 is a longitudinal sectional side view showing a usage state of a conventional friction damper.
１ フリクションダンパ ２ 環状芯金 ３ 弾性体 ６ 弾性体の切欠き ７ 弾性体の円筒面 １０ 外側環体 １１ 内側環体 １２ 内側環体のテーパ面 DESCRIPTION OF SYMBOLS 1 Friction damper 2 Ring core 3 Elastic body 6 Notch of elastic body 7 Cylindrical surface of elastic body 10 Outer ring body 11 Inner ring body 12 Tapered surface of inner ring body
Claims (2)
設けられるフリクションダンパであって、 一方環体に嵌合される環状芯金と、この環状芯金に被着
されかつ他方環体の周面に対し径方向に撓んだ状態で接
触させられる弾性体とを備え、 前記弾性体において前記他方環体と接触する領域が、円
錐形状に形成されていて、この弾性体の自由端側に、当
該弾性体と前記他方環体とが接触した状態において他方
環体の周面から浮き上がる面が設けられている、ことを
特徴とするフリクションダンパ。1. A friction damper provided between two annular members disposed radially inward and outward, comprising: an annular core fitted to one of the annular members; An elastic body which is brought into contact with the peripheral surface of the body in a state of being bent in a radial direction, wherein a region of the elastic body which comes into contact with the other annular body is formed in a conical shape, and the elastic body is free. A friction damper, wherein a surface that rises from a peripheral surface of the other ring is provided on an end side in a state where the elastic body and the other ring are in contact with each other.
おいて、前記弾性体の自由端側に設けられる面は、他方
環体の軸線に沿う円筒面とされている、ことを特徴とす
るフリクションダンパ。2. The friction damper according to claim 1, wherein a surface provided on a free end side of the elastic body is a cylindrical surface along an axis of the other annular body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9130898A JPH11287310A (en) | 1998-04-03 | 1998-04-03 | Friction damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9130898A JPH11287310A (en) | 1998-04-03 | 1998-04-03 | Friction damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11287310A true JPH11287310A (en) | 1999-10-19 |
Family
ID=14022850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9130898A Pending JPH11287310A (en) | 1998-04-03 | 1998-04-03 | Friction damper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11287310A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013217480A (en) * | 2012-04-12 | 2013-10-24 | Nok Corp | Friction damper |
| CN108458047A (en) * | 2017-02-21 | 2018-08-28 | 丰田自动车株式会社 | Frcition damper |
| CN111853074A (en) * | 2019-04-26 | 2020-10-30 | 丰田自动车株式会社 | Power transmission device |
-
1998
- 1998-04-03 JP JP9130898A patent/JPH11287310A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013217480A (en) * | 2012-04-12 | 2013-10-24 | Nok Corp | Friction damper |
| CN108458047A (en) * | 2017-02-21 | 2018-08-28 | 丰田自动车株式会社 | Frcition damper |
| CN108458047B (en) * | 2017-02-21 | 2020-05-19 | 丰田自动车株式会社 | Friction damper |
| US10788097B2 (en) | 2017-02-21 | 2020-09-29 | Toyota Jidosha Kabushiki Kaisha | Friction damper |
| CN111853074A (en) * | 2019-04-26 | 2020-10-30 | 丰田自动车株式会社 | Power transmission device |
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