JP3565230B2 - damper - Google Patents

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JP3565230B2
JP3565230B2 JP09012395A JP9012395A JP3565230B2 JP 3565230 B2 JP3565230 B2 JP 3565230B2 JP 09012395 A JP09012395 A JP 09012395A JP 9012395 A JP9012395 A JP 9012395A JP 3565230 B2 JP3565230 B2 JP 3565230B2
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Japan
Prior art keywords
sleeve
damper
sensor
hub
peripheral side
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JPH08261287A (en
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俊彦 伊藤
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Nok Corp
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Nok Corp
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【0001】
【産業上の利用分野】
本発明は、自動車エンジンのクランクシャフト等、各種の回転駆動系に生起される振動を吸収抑制するダンパに関する。
【0002】
【従来の技術】
従来からトーショナルダンパの一種として、回転速度検出用センサに対する被検出機能を備えたものが開発されているが(例えば、実開平5−92554号公報参照)、このダンパには、以下の問題がある。
【0003】
▲1▼ 図5および図6に示すように、従来のダンパにおいては、回転速度検出用センサ(図示せず)に対するセンサ被検出部21が径方向外方へ向けて突出した突起状のものとして設けられており、この突起状のセンサ被検出部21が板金製のスリーブ22の軸方向一端部に一体成形した外方屈曲部23の外周縁に一体成形されている。センサ被検出部21の径方向位置は、磁気近接形である回転速度検出用センサの径方向位置に合わせて定められ、よって段取りとしては、先ず、センサの径方向位置に合わせて外方屈曲部23の外径寸法が定められ、この外方屈曲部23の外周縁にセンサ被検出部21が設けられる。したがってセンサの径方向位置が変更されると、これに合わせて外方屈曲部23の外径寸法を変更しなければならず、外方屈曲部23の外径寸法を変えずにセンサ被検出部21の径方向位置だけを変えるといった便利なことができない。
【0004】
▲2▼ 上記したように、突起状のセンサ被検出部21が板金製のスリーブ22の軸方向一端部に一体成形した外方屈曲部23の外周縁に一体成形されているために、スリーブ22が大径化し、場合によっては、外方屈曲部23の外径寸法が質量体24の外径寸法を上回ることがある。したがってスリーブ22、延てはダンパ全体が大型化してしまう問題がある。またこのようにスリーブ22に外方屈曲部23を設けてこの外方屈曲部23にセンサ被検出部21を設ける場合には、作動時に弾性体25の弾性範囲内でハブ26およびスリーブ22に対して回転方向に相対運動する質量体24の作動を阻害することがないように、質量体24と外方屈曲部23とを互いに非接触としなければならず、このため質量体24と外方屈曲部23との間に軸方向の間隙xを設定しなければならない。したがってこれによりダンパの軸方向長さが長いものとなって、これによってもダンパ全体が大型化する問題がある。
【0005】
【発明が解決しようとする課題】
本発明は以上の点に鑑み、センサ被検出部の設置位置についての自由度が従来より広く、またダンパ全体が大型化することがないダンパを提供することを目的とする。
【0006】
【課題を解決するための手段】
上記目的を達成するため、本発明の請求項1によるダンパは、ハブの円筒部の外周側に板金製のスリーブを嵌着するとともに前記スリーブの外周側に弾性体を介して質量体を接続し、前記スリーブにセンサ被検出部を設けたダンパにおいて、前記スリーブの軸方向一端部に径方向内方へ屈曲された内方屈曲部が一体成形され、前記内方屈曲部に前記センサ被検出部が設けられ、前記センサ被検出部は、ダンパの中心軸線に対して交叉する板面の一部をプレスによって軸方向一方に突出させたものであり、かつ前記ハブの円筒部の内周側であって前記ハブの円筒部の軸方向先端よりも軸方向他方に後退した位置に配置されていることにした。
また本発明の請求項2によるダンパは、ハブの円筒部の外周側に板金製のスリーブを嵌着するとともに前記スリーブの外周側に弾性体を介して質量体を接続し、前記スリーブにセンサ被検出部を設けたダンパにおいて、前記スリーブの軸方向一端部に径方向内方へ屈曲された内方屈曲部が一体成形され、前記内方屈曲部に前記センサ被検出部(5)が設けられ、前記センサ被検出部は、ダンパの中心軸線に対して交叉する板面を被覆したゴム状弾性材製の被覆体に窓部を設けて前記板面の一部を表面露出させたものであり、かつ前記ハブの円筒部の内周側であって前記ハブの円筒部の軸方向先端よりも軸方向他方に後退した位置に配置されていることにした。
【0007】
また本発明の請求項3によるダンパにおいては、請求項2のダンパにおいて、被覆体が、スリーブに加硫接着したゴム状弾性材製の弾性体と一体成形されていることにした。
【0008】
【作用】
上記構成を備えた本発明の請求項1によるダンパにおいては、センサ被検出部が中心軸線に対して交叉する板面の一部をプレスによって軸方向一方に突出させたものであるために、板面の何処にセンサ被検出部を設けるかが任意とされる。
また上記構成を備えた本発明の請求項2によるダンパにおいては、センサ被検出部が中心軸線に対して交叉する板面を被覆したゴム状弾性材製の被覆体に窓部を設けて板面の一部を表面露出させたものであるために、請求項1によるダンパと同様に、板面の何処にセンサ被検出部を設けるかが任意とされる。
【0009】
またこれに加えて、上記構成を備えた本発明の請求項3によるダンパにおいては、被覆体がスリーブに加硫接着したゴム状弾性材製の弾性体と一体成形されているために、弾性材の加硫成形が一度で済ませられる。
またこれに加えて、スリーブがハブの円筒部の外周側に嵌着され、スリーブの軸方向一端部に径方向内方へ屈曲された内方屈曲部が一体成形され、内方屈曲部にセンサ被検出部が設けられていると、スリーブが大径化することがない。またハブと内方屈曲部とが相対運動するものでないために、両者の間に軸方向の間隙を設定する必要がない。
【0010】
【実施例】
つぎに本発明の実施例を図面にしたがって説明する。
【0011】
第一実施例・・・
図1および図2に示すように、ハブ1の円筒部(リム部とも称する)1aの外周側にスリーブ2が嵌着され、このスリーブ2の外周側に弾性体3を介して質量体(振動リングとも称する)4が接続され、スリーブ2の軸方向一端部に径方向内方へ屈曲された内方屈曲部2bが一体成形され、この内方屈曲部2bが、スリーブ本体2aの軸方向一端部に一体成形された第一径方向部2cと、第一径方向部2cの内周縁に一体成形された円筒状部2dと、円筒状部2dの軸方向他端部に一体成形された第二径方向部2eとを備えており、環状を呈する第二径方向部2eが一部、プレスによって軸方向一方(図1において右方向)に突出せしめられて、凸部状のセンサ被検出部5が所要数、等配に設けられている。
【0012】
ハブ1および質量体4はそれぞれ鋳鉄等の所定の金属によって環状に成形されている。スリーブ2は磁性体である板金によって環状に成形され、上記したスリーブ本体2aにおいてハブ1の円筒部1aの外周側に嵌着されている。弾性体3は所定のゴム状弾性材によって環状に成形され、成形と同時にスリーブ本体2aの外周面および質量体4の内周面に対してそれぞれ加硫接着されている。スリーブ2の第二径方向部2eはダンパの中心軸線0に対して直交しているが、中心軸線0に対して交叉していれば、必ずしも直角でなくても良い。
【0013】
上記構成を備えたダンパに対しては、センサ被検出部5の図上右側に回転速度検出用センサ(図示せず)が配置され、このセンサからセンサ被検出部5までの距離がセンサから第二径方向部2eまでの距離より短いために、ダンパの回転中にセンサ被検出部5がセンサに正対したことをその都度、センサが磁気的に検出することが可能である。そしてこのダンパは、以下の作用効果を奏する。
【0014】
▲1▼ 第二径方向部2eの内径寸法を変えなくても、この第二径方向部2eの任意の径方向位置にセンサ被検出部5を設けることができる。したがってセンサ被検出部5の設置位置についての自由度を従来より拡大することができる。
▲2▼ スリーブ2の軸方向一端部に径方向内方へ屈曲された内方屈曲部2bが一体成形され、この内方屈曲部2bにセンサ被検出部5が設けられているために、スリーブ2が大径化されることがない。したがってダンパ全体が大型化するのを防止することができる。またハブ1とスリーブ2とが相対運動するものでないために、ハブ1の円筒部1aの軸方向一端面(図上右端面)とスリーブ2の第一径方向部2cとの間に軸方向の間隙を設定する必要がなく、図示したように両者を接触状態で配置することができる。したがってダンパの軸方向長さが長くなることがないために、この点からもタンパが大型化するのを防止することができる。
▲3▼ スリーブ2が板金を三度に亙って直角に屈曲したものであるために、強度が高い。
▲4▼ センサ被検出部5がハブ1の円筒部1aの内周側に、ハブ1によって囲まれるように配置されているために、このセンサ被検出部5に塵埃または泥等のダストが付着しにくい。
【0015】
第二実施例・・・
図3および図4に示すように、ハブ1の円筒部(リム部とも称する)1aの外周側にスリーブ2が嵌着され、このスリーブ2の外周側に弾性体3を介して質量体(振動リングとも称する)4が接続され、スリーブ2の軸方向一端部に径方向内方へ屈曲された内方屈曲部2bが一体成形され、この内方屈曲部2bが、スリーブ本体2aの軸方向一端部に一体成形された第一径方向部2cと、第一径方向部2cの内周縁に一体成形された円筒状部2dと、円筒状部2dの軸方向他端部に一体成形された第二径方向部2eとを備えている。またこの内方屈曲部2bの一面に全面に亙ってゴム状弾性材製の被覆体6が被着され、第二径方向部2eにおいて、この被覆体6に窓部6aが設けられて第二径方向部2eの一部が表面露出せしめられ、金属露出状態のセンサ被検出部5が所要数、等配に設けられている。被覆体6は弾性体3と一体成形されている。
【0016】
ハブ1および質量体4はそれぞれ鋳鉄等の所定の金属によって環状に成形されている。スリーブ2は磁性体である板金によって環状に成形され、上記したスリーブ本体2aにおいてハブ1の円筒部1aの外周側に嵌着されている。弾性体3は所定のゴム状弾性材によって環状に成形され、成形と同時にスリーブ本体2aの外周面および質量体4の内周面に対してそれぞれ加硫接着されている。被覆体6は弾性体3と同種のゴム状弾性材によって環状に成形され、成形と同時に内方屈曲部2bの一面に対して加硫接着されている。スリーブ2の第二径方向部2eはダンパの中心軸線0に対して直交しているが、中心軸線0に対して交叉していれば、必ずしも直角でなくても良い。
【0017】
上記構成を備えたダンパに対しては、センサ被検出部5の図上右側に回転速度検出用センサ(図示せず)が配置され、このセンサと第二径方向部2eとの間にゴム状弾性材製の被覆体6が介在するかしないか(窓部6aにおいては介在しない)によって感度が異なるために、ダンパの回転中にセンサ被検出部5がセンサに正対したことをその都度、センサが磁気的に検出することが可能である。そしてこのダンパは、以下の作用効果を奏する。
【0018】
▲1▼ 第二径方向部2eの内径寸法を変えなくても、この第二径方向部2eの任意の径方向位置にセンサ被検出部5を設けることができる。したがってセンサ被検出部5の設置位置についての自由度を従来より拡大することができる。
▲2▼ スリーブ2の軸方向一端部に径方向内方へ屈曲された内方屈曲部2bが一体成形され、この内方屈曲部2bにセンサ被検出部5が設けられているために、スリーブ2が大径化されることがない。したがってダンパ全体が大型化するのを防止することができる。またハブ1とスリーブ2とが相対運動するものでないために、ハブ1の円筒部1aの軸方向一端面(図上右端面)とスリーブ2の第一径方向部2cとの間に軸方向の間隙を設定する必要がなく、両者を接触状態で配置することができる。したがってダンパの軸方向長さが長くなることがないために、この点からもタンパが大型化するのを防止することができる。
【0019】
▲3▼ スリーブ2が板金を三度に亙って直角に屈曲したものであるために、強度が高い。
▲4▼ センサ被検出部5がハブ1の円筒部1aの内周側に、ハブ1によって囲まれるように配置されているために、このセンサ被検出部5に塵埃または泥等のダストが付着しにくい。
▲5▼ 被覆体6が弾性体3と一体成形されているために、弾性材の加硫成形を一度で済ませられる。またこの加硫成形に際して窓部6aとなるところをマスキングすれば、加硫成形の終了と同時にセンサ被検出部5の形成を終えることができる。したがってこれらの点から成形が容易である。
▲6▼ 内方屈曲部2bの略全面がゴム状弾性材製の被覆体6で覆われているために、防音効果を期待することができる。
【0020】
【発明の効果】
本発明は、以下の効果を奏する。
【0021】
すなわち、先ず、上記構成を備えた本発明の請求項1によるダンパにおいては、センサ被検出部が中心軸線に対して交叉する板面の一部をプレスによって軸方向一方に突出させたものであるために、板面の内径寸法を変えなくても、この板面の任意の径方向位置にセンサ被検出部を設けることができる。したがってセンサ被検出部の設置位置についての自由度を従来より拡大することができる。
また上記構成を備えた本発明の請求項2によるダンパにおいては、センサ被検出部が中心軸線に対して交叉する板面を被覆したゴム状弾性材製の被覆体に窓部を設けて板面の一部を表面露出させたものであるために、板面の内径寸法を変えなくても、この板面の任意の径方向位置にセンサ被検出部を設けることができる。したがってセンサ被検出部の設置位置についての自由度を従来より拡大することができる。また板面にゴム状弾性材製の被覆体を被覆すれば、防音効果を期待することができる。
【0022】
また上記構成を備えた本発明の請求項3によるダンパにおいては、これに加えて、被覆体が弾性体と一体成形されているために、弾性材の加硫成形を一度で済ませられる。またこの加硫成形に際して窓部となるところをマスキングすれば、加硫成形の終了と同時にセンサ被検出部の形成を終えることができる。したがってこれらの点から成形が容易である。
またこれに加えて、スリーブがハブの円筒部の外周側に嵌着され、スリーブの軸方向一端部に径方向内方へ屈曲された内方屈曲部が一体成形され、内方屈曲部にセンサ被検出部が設けられているために、スリーブが大径化することがない。またハブと内方屈曲部とが相対運動するものでないために、両者の間に軸方向の間隙を設定する必要がない。したがってダンパが大型化するのを防止することができる。
【図面の簡単な説明】
【図1】本発明の第一実施例に係るダンパの半裁断面図
【図2】図1におけるB方向矢視図
【図3】本発明の第二実施例に係るダンパの半裁断面図
【図4】図3におけるC方向矢視図
【図5】従来例に係るダンパの半裁断面図
【図6】図5におけるA方向矢視図
【符号の説明】
1 ハブ
1a 円筒部
2 スリーブ
2a スリーブ本体
2b 内方屈曲部
2c 第一径方向部
2d 円筒状部
2e 第二径方向部
3 弾性体
4 質量体
5 センサ被検出部
6 被覆体
6a 窓部
0 中心軸線
[0001]
[Industrial applications]
The present invention relates to a damper that absorbs and suppresses vibrations generated in various rotary drive systems such as a crankshaft of an automobile engine.
[0002]
[Prior art]
Conventionally, as a kind of torsion damper, a torsion damper having a function of detecting a rotational speed sensor has been developed (for example, see Japanese Utility Model Laid-Open No. 5-92554). However, this damper has the following problems. is there.
[0003]
{Circle around (1)} As shown in FIGS. 5 and 6, in the conventional damper, the sensor detection portion 21 for the rotation speed detection sensor (not shown) is formed as a protrusion projecting radially outward. The protruding sensor-detected portion 21 is formed integrally with the outer peripheral edge of an outer bent portion 23 formed integrally with one axial end portion of a sleeve 22 made of sheet metal. The radial position of the sensor detection portion 21 is determined in accordance with the radial position of the magnetic proximity sensor for detecting the rotational speed, and therefore, as a setup, first, the outer bent portion is adjusted in accordance with the radial position of the sensor. The outer diameter of the outer bent portion 23 is determined, and the sensor detected portion 21 is provided on the outer peripheral edge of the outer bent portion 23. Therefore, when the radial position of the sensor is changed, the outer diameter of the outer bent portion 23 must be changed in accordance with the change. It is not possible to do such a convenient operation as changing only the radial position of 21.
[0004]
{Circle around (2)} As described above, since the projecting sensor-detected portion 21 is integrally formed on the outer peripheral edge of the outer bent portion 23 integrally formed on one axial end of the sleeve 22 made of sheet metal, In some cases, the outer diameter of the outer bent portion 23 may exceed the outer diameter of the mass body 24. Therefore, there is a problem that the size of the sleeve 22, and hence the entire damper, is increased. When the outer bent portion 23 is provided on the sleeve 22 and the sensor detection portion 21 is provided on the outer bent portion 23 in this manner, the hub 26 and the sleeve 22 are within the elastic range of the elastic body 25 during operation. In order not to hinder the operation of the mass body 24 that relatively moves in the rotation direction, the mass body 24 and the outward bent portion 23 must be in non-contact with each other. An axial gap x must be set with the part 23. Therefore, this increases the axial length of the damper, which also causes a problem that the entire damper becomes large.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a damper that has a greater degree of freedom regarding the installation position of a sensor detection unit than before and does not increase the size of the entire damper.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a damper according to claim 1 of the present invention has a structure in which a sheet metal sleeve is fitted to an outer peripheral side of a cylindrical portion of a hub and a mass body is connected to an outer peripheral side of the sleeve via an elastic body. In a damper provided with a sensor detected portion on the sleeve, an inner bent portion bent inward in the radial direction is integrally formed at one axial end of the sleeve, and the sensor detected portion is formed on the inner bent portion. Is provided, wherein the sensor-detected portion has a portion of a plate surface intersecting with the center axis of the damper protruded in one axial direction by a press , and the inner peripheral side of the cylindrical portion of the hub. The hub is disposed at a position retracted in the other axial direction from the axial end of the cylindrical portion of the hub .
In the damper according to a second aspect of the present invention, a sleeve made of sheet metal is fitted on the outer peripheral side of the cylindrical portion of the hub, and a mass body is connected to the outer peripheral side of the sleeve via an elastic body. In the damper provided with the detecting portion, an inner bent portion bent inward in the radial direction is integrally formed at one axial end of the sleeve, and the sensor detected portion (5) is provided at the inner bent portion. The sensor-detected portion is formed by providing a window portion in a covering body made of a rubber-like elastic material and covering a plate surface intersecting a center axis of a damper, and exposing a part of the plate surface . In addition, it is arranged on the inner peripheral side of the cylindrical portion of the hub and at a position retracted in the other axial direction from the axial end of the cylindrical portion of the hub .
[0007]
Further, in the damper according to claim 3 of the present invention, in the damper according to claim 2, the cover is integrally formed with an elastic body made of a rubber-like elastic material which is vulcanized and adhered to the sleeve.
[0008]
[Action]
In the damper according to the first aspect of the present invention having the above-described configuration, since the sensor-detected portion has a part of the plate surface intersecting with the center axis projected in one axial direction by a press, Where on the surface the sensor detected portion is provided is arbitrary.
Further, in the damper according to the second aspect of the present invention having the above structure, a window portion is provided on a covering member made of a rubber-like elastic material in which a sensor detected portion covers a plate surface intersecting with the center axis. Since a part of the plate is exposed on the surface, as in the case of the damper according to the first aspect, it is arbitrarily determined where the sensor detection unit is provided on the plate surface.
[0009]
In addition to the above, in the damper according to the third aspect of the present invention having the above-described configuration, since the cover is integrally formed with the elastic body made of rubber-like elastic material which is vulcanized and adhered to the sleeve, Vulcanization molding is completed only once.
In addition to this, a sleeve is fitted on the outer peripheral side of the cylindrical portion of the hub, and an inner bent portion bent inward in the radial direction is integrally formed at one axial end of the sleeve, and a sensor is formed on the inner bent portion. When the detected portion is provided , the sleeve does not increase in diameter. Further, since the hub and the inwardly bent portion do not move relative to each other, there is no need to set an axial gap between the hub and the inwardly bent portion.
[0010]
【Example】
Next, embodiments of the present invention will be described with reference to the drawings.
[0011]
First embodiment ...
As shown in FIGS. 1 and 2, a sleeve 2 is fitted on an outer peripheral side of a cylindrical portion (also referred to as a rim portion) 1 a of a hub 1, and a mass body (vibration) is provided on an outer peripheral side of the sleeve 2 via an elastic body 3. 4) is connected, and an inner bent portion 2b bent inward in the radial direction is integrally formed at one axial end portion of the sleeve 2; A first radial portion 2c integrally formed with the portion, a cylindrical portion 2d integrally formed on the inner peripheral edge of the first radial portion 2c, and a second portion formed integrally with the other axial end of the cylindrical portion 2d. A part of the second radial portion 2e having an annular shape is protruded in one axial direction (rightward in FIG. 1) by a press to form a convex sensor-detected portion. 5 are provided in a required number, equally distributed.
[0012]
The hub 1 and the mass body 4 are each formed in a ring shape from a predetermined metal such as cast iron. The sleeve 2 is formed in an annular shape from a sheet metal, which is a magnetic material, and is fitted to the outer peripheral side of the cylindrical portion 1a of the hub 1 in the sleeve main body 2a. The elastic body 3 is formed into an annular shape by a predetermined rubber-like elastic material, and is simultaneously vulcanized and bonded to the outer peripheral surface of the sleeve body 2a and the inner peripheral surface of the mass body 4 at the same time as the molding. Although the second radial portion 2e of the sleeve 2 is orthogonal to the center axis 0 of the damper, the second radial portion 2e is not necessarily perpendicular to the center axis 0 as long as it intersects with the center axis 0.
[0013]
For the damper having the above configuration, a rotation speed detection sensor (not shown) is disposed on the right side of the sensor detected portion 5 in the drawing, and the distance from this sensor to the sensor detected portion 5 is the distance from the sensor to the sensor. Since the distance is shorter than the distance to the two radial portions 2e, it is possible for the sensor to magnetically detect each time the sensor detected portion 5 faces the sensor during rotation of the damper. The damper has the following operation and effects.
[0014]
(1) The sensor detection portion 5 can be provided at an arbitrary radial position of the second radial portion 2e without changing the inner diameter of the second radial portion 2e. Therefore, the degree of freedom regarding the installation position of the sensor detection unit 5 can be increased as compared with the related art.
{Circle around (2)} An inner bent portion 2b bent inward in the radial direction is integrally formed at one axial end of the sleeve 2, and the sensor detected portion 5 is provided in the inner bent portion 2b. 2 is not enlarged. Therefore, it is possible to prevent the entire damper from increasing in size. Further, since the hub 1 and the sleeve 2 do not move relative to each other, the axial direction between the one end surface (right end surface in the figure) of the cylindrical portion 1a of the hub 1 and the first radial portion 2c of the sleeve 2 There is no need to set a gap, and both can be arranged in contact as shown. Therefore, since the axial length of the damper does not increase, the tamper can be prevented from increasing in size in this respect as well.
{Circle around (3)} The strength is high because the sleeve 2 is formed by bending the sheet metal three times at a right angle.
{Circle over (4)} Since the sensor detection portion 5 is arranged on the inner peripheral side of the cylindrical portion 1a of the hub 1 so as to be surrounded by the hub 1, dust such as dust or mud adheres to the sensor detection portion 5. Hard to do.
[0015]
Second embodiment ...
As shown in FIGS. 3 and 4, a sleeve 2 is fitted on an outer peripheral side of a cylindrical portion (also referred to as a rim portion) 1 a of the hub 1, and a mass body (vibration) is attached to the outer peripheral side of the sleeve 2 via an elastic body 3. 4) is connected, and an inner bent portion 2b bent inward in the radial direction is integrally formed at one axial end portion of the sleeve 2; A first radial portion 2c integrally formed with the portion, a cylindrical portion 2d integrally formed on the inner peripheral edge of the first radial portion 2c, and a second portion formed integrally with the other axial end of the cylindrical portion 2d. And two radial portions 2e. A coating 6 made of a rubber-like elastic material is applied to one surface of the inwardly bent portion 2b over the entire surface, and a window 6a is provided in the coating 6 in the second radial portion 2e. A part of the two radial portions 2e is exposed on the surface, and a required number of sensor-detected portions 5 in a metal-exposed state are provided in an evenly distributed manner. The cover 6 is formed integrally with the elastic body 3.
[0016]
The hub 1 and the mass body 4 are each formed in a ring shape from a predetermined metal such as cast iron. The sleeve 2 is formed in an annular shape from a sheet metal, which is a magnetic material, and is fitted to the outer peripheral side of the cylindrical portion 1a of the hub 1 in the sleeve main body 2a. The elastic body 3 is formed into an annular shape by a predetermined rubber-like elastic material, and is simultaneously vulcanized and bonded to the outer peripheral surface of the sleeve body 2a and the inner peripheral surface of the mass body 4 at the same time as the molding. The cover 6 is formed in a ring shape from a rubber-like elastic material of the same kind as the elastic body 3, and is simultaneously vulcanized and bonded to one surface of the inwardly bent portion 2b. Although the second radial portion 2e of the sleeve 2 is orthogonal to the center axis 0 of the damper, the second radial portion 2e is not necessarily perpendicular to the center axis 0 as long as it intersects with the center axis 0.
[0017]
With respect to the damper having the above configuration, a rotation speed detection sensor (not shown) is disposed on the right side of the sensor detected portion 5 in the drawing, and a rubber-like sensor is provided between the sensor and the second radial portion 2e. Since the sensitivity differs depending on whether or not the covering 6 made of an elastic material is interposed (not interposed in the window 6a), each time the sensor-detected portion 5 faces the sensor during rotation of the damper, The sensor can detect magnetically. The damper has the following operation and effects.
[0018]
(1) The sensor detection portion 5 can be provided at an arbitrary radial position of the second radial portion 2e without changing the inner diameter of the second radial portion 2e. Therefore, the degree of freedom regarding the installation position of the sensor detection unit 5 can be increased as compared with the related art.
{Circle around (2)} An inner bent portion 2b bent inward in the radial direction is integrally formed at one axial end of the sleeve 2, and the sensor detected portion 5 is provided in the inner bent portion 2b. 2 is not enlarged. Therefore, it is possible to prevent the entire damper from increasing in size. Further, since the hub 1 and the sleeve 2 do not move relative to each other, the axial direction between the one end surface (right end surface in the figure) of the cylindrical portion 1a of the hub 1 and the first radial portion 2c of the sleeve 2 There is no need to set a gap, and both can be arranged in contact. Therefore, since the axial length of the damper does not increase, the tamper can be prevented from increasing in size in this respect as well.
[0019]
{Circle around (3)} The strength is high because the sleeve 2 is formed by bending the sheet metal three times at a right angle.
{Circle over (4)} Since the sensor detection portion 5 is arranged on the inner peripheral side of the cylindrical portion 1a of the hub 1 so as to be surrounded by the hub 1, dust such as dust or mud adheres to the sensor detection portion 5. Hard to do.
{Circle around (5)} Since the cover 6 is integrally formed with the elastic body 3, vulcanization molding of the elastic material can be performed only once. Also, by masking the portion to be the window 6a during the vulcanization molding, the formation of the sensor detection portion 5 can be completed simultaneously with the end of the vulcanization molding. Therefore, molding is easy from these points.
{Circle around (6)} Since almost the entire surface of the inwardly bent portion 2b is covered with the covering 6 made of a rubber-like elastic material, a soundproofing effect can be expected.
[0020]
【The invention's effect】
The present invention has the following effects.
[0021]
That is, first, in the damper according to the first aspect of the present invention having the above-described configuration, a part of the plate surface where the sensor detection portion intersects the central axis is projected in the axial direction by pressing. For this reason, the sensor detection portion can be provided at any radial position on the plate surface without changing the inner diameter of the plate surface. Therefore, the degree of freedom regarding the installation position of the sensor detection unit can be increased as compared with the related art.
Further, in the damper according to the second aspect of the present invention having the above structure, a window portion is provided on a covering member made of a rubber-like elastic material in which a sensor detected portion covers a plate surface intersecting with the center axis. Since the surface is partially exposed, the sensor detection portion can be provided at any radial position on the plate surface without changing the inner diameter of the plate surface. Therefore, the degree of freedom regarding the installation position of the sensor detection unit can be increased as compared with the related art. If the plate surface is covered with a covering made of a rubber-like elastic material, a soundproofing effect can be expected.
[0022]
In addition, in the damper according to the third aspect of the present invention having the above-described structure, since the covering is integrally formed with the elastic body, vulcanization molding of the elastic material can be completed at one time. In addition, by masking the window portion during vulcanization molding, the formation of the sensor detection portion can be completed simultaneously with the end of the vulcanization molding. Therefore, molding is easy from these points.
In addition to this, a sleeve is fitted on the outer peripheral side of the cylindrical portion of the hub, and an inner bent portion bent inward in the radial direction is integrally formed at one axial end of the sleeve, and a sensor is formed on the inner bent portion. Since the detected portion is provided, the diameter of the sleeve does not increase. Further, since the hub and the inwardly bent portion do not move relative to each other, there is no need to set an axial gap between the hub and the inwardly bent portion. Therefore, it is possible to prevent the damper from increasing in size.
[Brief description of the drawings]
FIG. 1 is a half sectional view of a damper according to a first embodiment of the present invention. FIG. 2 is a view in the direction of arrow B in FIG. 1. FIG. 3 is a half sectional view of a damper according to a second embodiment of the present invention. 4 is a view in the direction of the arrow C in FIG. 3 [FIG. 5] A half cut sectional view of a damper according to a conventional example [FIG.
DESCRIPTION OF SYMBOLS 1 Hub 1a Cylindrical part 2 Sleeve 2a Sleeve main body 2b Inwardly bent part 2c First radial part 2d Cylindrical part 2e Second radial part 3 Elastic body 4 Mass body 5 Sensor detected part 6 Coating body 6a Window 0 Center Axis

Claims (3)

ハブ(1)の円筒部(1a)の外周側に板金製のスリーブ(2)を嵌着するとともに前記スリーブ(2)の外周側に弾性体(3)を介して質量体(4)を接続し、前記スリーブ(2)にセンサ被検出部(5)を設けたダンパにおいて、
前記スリーブ(2)の軸方向一端部に径方向内方へ屈曲された内方屈曲部(2b)が一体成形され、前記内方屈曲部(2b)に前記センサ被検出部(5)が設けられ、
前記センサ被検出部(5)は、ダンパの中心軸線(0)に対して交叉する板面の一部をプレスによって軸方向一方に突出させたものであり、かつ前記ハブ(1)の円筒部(1a)の内周側であって前記ハブ(1)の円筒部(1a)の軸方向先端よりも軸方向他方に後退した位置に配置されていることを特徴とするダンパ。
A sleeve (2) made of sheet metal is fitted on the outer peripheral side of the cylindrical portion (1a) of the hub (1), and a mass body (4) is connected to the outer peripheral side of the sleeve (2) via an elastic body (3). And, in the damper in which the sensor detected part (5) is provided on the sleeve (2),
An inner bent portion (2b) bent radially inward is integrally formed at one axial end of the sleeve (2), and the sensor detected portion (5) is provided at the inner bent portion (2b). And
The sensor-detected portion (5) is formed by pressing a part of a plate surface crossing a center axis (0 ) of the damper in one axial direction by pressing , and a cylindrical portion of the hub (1). A damper characterized by being disposed on the inner peripheral side of (1a) and retreated in the axial direction other than the axial end of the cylindrical portion (1a) of the hub (1) .
ハブ(1)の円筒部(1a)の外周側に板金製のスリーブ(2)を嵌着するとともに前記スリーブ(2)の外周側に弾性体(3)を介して質量体(4)を接続し、前記スリーブ(2)にセンサ被検出部(5)を設けたダンパにおいて、
前記スリーブ(2)の軸方向一端部に径方向内方へ屈曲された内方屈曲部(2b)が一体成形され、前記内方屈曲部(2b)に前記センサ被検出部(5)が設けられ、
前記センサ被検出部(5)は、ダンパの中心軸線(0)に対して交叉する板面を被覆したゴム状弾性材製の被覆体(6)に窓部(6a)を設けて前記板面の一部を表面露出させたものであり、かつ前記ハブ(1)の円筒部(1a)の内周側であって前記ハブ(1)の円筒部(1a)の軸方向先端よりも軸方向他方に後退した位置に配置されていることを特徴とするダンパ。
A sleeve (2) made of sheet metal is fitted on the outer peripheral side of the cylindrical portion (1a) of the hub (1), and a mass body (4) is connected to the outer peripheral side of the sleeve (2) via an elastic body (3). And, in the damper in which the sensor detected part (5) is provided on the sleeve (2),
An inner bent portion (2b) bent radially inward is integrally formed at one axial end of the sleeve (2), and the sensor detected portion (5) is provided at the inner bent portion (2b). And
The sensor-detected portion (5) is provided with a window (6a) on a cover (6) made of a rubber-like elastic material and covering a plate surface intersecting the center axis (0 ) of the damper. Is partially exposed on the surface and is located on the inner peripheral side of the cylindrical portion (1a) of the hub (1) and is more axially than the axial end of the cylindrical portion (1a) of the hub (1). A damper characterized by being disposed at a position retreated on the other side .
請求項2のダンパにおいて、被覆体(6)が、スリーブ(2)に加硫接着したゴム状弾性材製の弾性体(3)と一体成形されていることを特徴とするダンパ。3. The damper according to claim 2, wherein the covering (6) is integrally formed with an elastic body (3) made of a rubber-like elastic material which is vulcanized and bonded to the sleeve (2).
JP09012395A 1995-03-24 1995-03-24 damper Expired - Fee Related JP3565230B2 (en)

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JP3565230B2 true JP3565230B2 (en) 2004-09-15

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FR2853384B1 (en) * 2003-04-01 2006-06-30 Skf Ab PULLEY, DETECTION DEVICE COMPRISING SUCH PULLEY, AND INTERNAL COMBUSTION ENGINE EQUIPPED WITH SUCH A DEVICE

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