JP2006242289A - Vibration-proofing bush - Google Patents

Vibration-proofing bush Download PDF

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JP2006242289A
JP2006242289A JP2005059288A JP2005059288A JP2006242289A JP 2006242289 A JP2006242289 A JP 2006242289A JP 2005059288 A JP2005059288 A JP 2005059288A JP 2005059288 A JP2005059288 A JP 2005059288A JP 2006242289 A JP2006242289 A JP 2006242289A
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elastic body
rubber elastic
fitting
vibration
peripheral surface
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JP4395760B2 (en
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Yorikazu Nakamura
順和 中村
Hiroaki Nagai
廣明 永井
Michiharu Hikosaka
道治 彦坂
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Sumitomo Riko Co Ltd
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Sumitomo Riko Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration-proofing bush capable of responding to a request for a large twisting angle by allowing a spring constant in the twisting direction to be set further low while increasing a spring constant in a direction perpendicular to an axis, in relation to a press-in type vibration-proofing bush; to provide its manufacturing method. <P>SOLUTION: This vibration-proofing bush comprises: an outer tube fitting 1; a rubber elastic body 2 nearly cylindrically formed by being vulcanized and stuck to the inside surface of the outer tube fitting 1 and having projection parts 21, 21 at both axial ends of its inside surface; and an inner tube fitting 3 having, on its circumferential surface, recessed grooves 31, 31 engaging with the projection parts 21, 21 of the rubber elastic body 2 and pressed in the inner peripheral side of the rubber elastic body 2. A sliding treatment is applied to at least either of contact surfaces of the rubber elastic body 2 and the inner tube fitting 3. By reducing the diameter of the outer tube fitting 1 throughout the whole axial part from the peripheral side of the outer tube fitting 1 after pressing the inner tube fitting 3 in the inner peripheral side of the rubber elastic body 2, radial pre-compression is applied to the rubber elastic body 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えば車両のサスペンションの連結部等において好適に採用される防振ブッシュに関する。   The present invention relates to an anti-vibration bush that is suitably employed, for example, in a connection part of a vehicle suspension.

従来より、例えば車両のサスペンションにおいては、車体へ伝達される振動を抑制するために、ロッドやアーム等の連結部に防振ブッシュが採用されており、このような防振ブッシュとして、例えば特許文献１〜４に開示されているような圧入タイプのものが知られている。これらの防振ブッシュは、内筒金具と、内筒金具の外周側に同軸状に配置される外筒金具と、内筒金具と外筒金具の間に介在して両金具を一体的に連結する筒状のゴム弾性体とから構成され、内筒金具及び外筒金具の少なくとも一方をゴム弾性体に対して圧入することにより組付けられている。なお、これらの防振ブッシュでは、外筒金具とゴム弾性体を非接着にした場合、軸方向に大きな力が作用すると抜けてしまう恐れがあることから、外筒金具の圧入後、その両端に縮径部や曲げ部を形成して抜けを防止するようにしている。   Conventionally, in a vehicle suspension, for example, in order to suppress vibration transmitted to the vehicle body, a vibration isolating bush has been employed in a connecting portion such as a rod or an arm. A press-fitting type as disclosed in 1-4 is known. These anti-vibration bushes are integrally connected to the inner cylinder fitting, the outer cylinder fitting coaxially disposed on the outer peripheral side of the inner cylinder fitting, and the inner cylinder fitting and the outer cylinder fitting interposed therebetween. And is assembled by press-fitting at least one of the inner cylinder fitting and the outer cylinder fitting into the rubber elastic body. In these anti-vibration bushes, if the outer cylinder fitting and the rubber elastic body are not bonded, there is a risk that they will come off when a large force is applied in the axial direction. A diameter-reduced portion or a bent portion is formed so as to prevent the omission.

また、例えば特許文献５に開示されているように、ブッシュ軸心回りのねじり方向やブッシュ軸心に対して傾斜したこじり方向の力を吸収する球面摺動機構を内蔵した球面摺動型のブッシュ組立体が知られている。この防振ブッシュは、軸方向中間部の外周面に球状凸面を有する内筒金具と、内筒金具の球状凸面に摺接される球状凹面を有する摺動部材と、内筒金具の外側に距離を隔てて同心的に配置される押えスリーブやレース金具、弾性部材、外筒金具等により構成されている。   Further, as disclosed in, for example, Patent Document 5, a spherical sliding bush having a built-in spherical sliding mechanism that absorbs a force in a twisting direction around the bush axis and a twisting direction inclined with respect to the bush axis. Assemblies are known. The vibration isolating bush includes an inner cylindrical fitting having a spherical convex surface on the outer peripheral surface of the axially intermediate portion, a sliding member having a spherical concave surface slidably in contact with the spherical convex surface of the inner cylindrical fitting, and a distance to the outside of the inner cylindrical fitting. And a presser sleeve, a lace fitting, an elastic member, an outer cylinder fitting, and the like that are arranged concentrically with each other.

ところで、サスペンションに採用される防振ブッシュは、一般に、車両の良好な操縦安定性を確保するために、ブッシュ軸直角方向のばね定数を高くするとともに、良好な乗り心地を得るために、ねじり方向のばね定数を低くすることが重要な要件として要求される。そのため、圧入タイプの防振ブッシュの場合には、内筒金具と外筒金具の間に介在するゴム弾性体が、圧入により予圧縮された状態にされていることにより、ブッシュ軸方向のばね定数が高くなるようにされ、また、ゴム弾性体が内筒金具や外筒金具と非接着にされていることにより、ねじり方向のばね定数が低くなるようにされている。よって、大きなねじり角が必要となる場合に、圧入タイプや球面摺動タイプの防振ブッシュが好適に採用される。   By the way, the anti-vibration bush used for the suspension generally has a high spring constant in the direction perpendicular to the bush axis in order to ensure good steering stability of the vehicle, and in the twist direction in order to obtain a good riding comfort. It is required as an important requirement to lower the spring constant. Therefore, in the case of a press-fit type anti-vibration bush, the rubber elastic body interposed between the inner cylinder fitting and the outer cylinder fitting is in a pre-compressed state by press fitting, so that the spring constant in the bush axis direction Further, since the rubber elastic body is not bonded to the inner cylinder fitting or the outer cylinder fitting, the spring constant in the torsion direction is lowered. Therefore, when a large torsion angle is required, a press-fit type or a spherical sliding type vibration-proof bushing is preferably employed.

ところが、圧入タイプの防振ブッシュにおいて、大きなねじり角の要求に対応する場合には、ゴム弾性体にねじり角に見合った予圧縮が必要となる。しかし、ゴム弾性体の予圧縮を大きくすると、その分、圧入時に大きな押圧力が必要になることから、圧入作業が困難になったり、ゴム弾性体に破損が発生したりするなど製造上の問題が生じるため、予圧縮を大きくするにも限界がある。一方、球面摺動型のブッシュ組立体の場合には、多数の部品が組み合わされているため、構造が複雑になり、コスト上昇を免れない。また、わずかながらガタが発生し易いことから、それが初期の操縦安定性に悪影響を及ぼすこととなる。
特開平９−１９９７５号公報 特開平８−２３３００８号公報 特開平８−２７０６９８号公報 特許第３０５１００４号公報 実公平５−２９５６１号公報 However, in the case of a press-fitting type vibration-proof bushing, in order to meet the demand for a large torsion angle, the rubber elastic body needs to be pre-compressed according to the torsion angle. However, if the pre-compression of the rubber elastic body is increased, a large pressing force is required at the time of press-fitting, so that the press-fitting work becomes difficult and the rubber elastic body is damaged. Therefore, there is a limit to increasing the precompression. On the other hand, in the case of a spherical sliding bush assembly, since a large number of parts are combined, the structure becomes complicated and an increase in cost is inevitable. In addition, since a slight backlash is likely to occur, this adversely affects the initial steering stability.
Japanese Patent Laid-Open No. 9-19975 JP-A-8-233008 JP-A-8-270698 Japanese Patent No. 3051004 Japanese Utility Model Publication No. 5-29561

本発明は上記実状に鑑みてなされたものであり、圧入タイプの防振ブッシュにおいて、軸直角方向のばね定数を高くしつつ、ねじり方向のばね定数をより低く設定し得るようにして、大きなねじり角の要求に対応可能な防振ブッシュ及びその製造方法を提供することを解決すべき課題とするものである。   The present invention has been made in view of the above circumstances, and in a press-fitting type vibration-proof bushing, the spring constant in the direction perpendicular to the axis can be increased while the spring constant in the torsion direction can be set lower, so that It is a problem to be solved to provide a vibration-proof bushing capable of meeting corner requirements and a method for manufacturing the same.

上記課題を解決する本発明に係る防振ブッシュは、外筒金具と、該外筒金具の内周面に加硫接着されて筒状に形成され自己の内周面の少なくとも１箇所に凹部又は凸部を有するゴム弾性体と、該ゴム弾性体の凹部又は凸部と係合する凸部又は凹部を外周面に有し前記ゴム弾性体の内周側に圧入された内筒金具と、からなり、前記ゴム弾性体と前記内筒金具の接触面の少なくとも一方の面に摺動処理が施されているとともに、前記ゴム弾性体は、内周側に前記内筒金具が圧入された後、前記外筒金具の外周側から軸方向の全体にわたって前記外筒金具の縮径加工が施されることにより径方向に予圧縮されていることを特徴としている。   An anti-vibration bush according to the present invention that solves the above-described problems is an outer cylinder fitting and a vulcanization-bonded inner circumferential surface of the outer cylinder fitting that is formed into a cylindrical shape and has a recess or a recess in at least one place on its inner circumferential surface. A rubber elastic body having a convex portion, and an inner cylinder fitting that has a convex portion or a concave portion that engages with the concave portion or the convex portion of the rubber elastic body on the outer peripheral surface and is press-fitted to the inner peripheral side of the rubber elastic body. And at least one of the contact surfaces of the rubber elastic body and the inner cylinder fitting has been subjected to a sliding treatment, and the rubber elastic body is, after the inner cylinder fitting has been press-fitted to the inner peripheral side, The outer cylinder fitting is pre-compressed in the radial direction by reducing the diameter of the outer cylinder fitting from the outer peripheral side to the entire axial direction.

本発明の防振ブッシュでは、ブッシュ軸心回りのねじり方向に大きな力が作用すると、ゴム弾性体と内筒金具の接触面の少なくとも一方の面に摺動処理が施されていることにより、ゴム弾性体と内筒金具の間に滑りが発生する。そのため、ねじり方向のばね定数を大幅に低く設定することができ、大きなねじり角に対しても限界無く対応可能となる。また、ゴム弾性体には、内筒金具の圧入と外筒金具の縮径とによって、常時、充分な予圧縮が付与されていることから、軸直角方向のばね定数を高く設定することができるとともに、ゴム弾性体と内筒金具との間に、前記した球面摺動型の防振ブッシュのようにガタが発生することもない。また、ゴム弾性体と内筒金具は、ゴム弾性体の内周面と内筒金具の外周面にそれぞれ設けられた凹部又は凸部により係合されているため、軸方向の相対移動が規制されることによって内筒金具の抜けが防止される。   In the anti-vibration bush of the present invention, when a large force acts in the torsional direction around the bush axis, the rubber elastic body and the inner cylindrical fitting are subjected to a sliding process on at least one of the contact surfaces. Slip occurs between the elastic body and the inner cylinder fitting. Therefore, the spring constant in the torsion direction can be set to be significantly low, and a large torsion angle can be handled without limit. Further, since the rubber elastic body is always sufficiently precompressed by the press-fitting of the inner cylinder fitting and the reduced diameter of the outer cylinder fitting, the spring constant in the direction perpendicular to the axis can be set high. At the same time, no play is generated between the rubber elastic body and the inner cylindrical metal fitting, unlike the above-described spherical sliding vibration-proof bushing. Further, since the rubber elastic body and the inner cylindrical metal fitting are engaged by the concave or convex portions respectively provided on the inner peripheral surface of the rubber elastic body and the outer peripheral surface of the inner cylindrical metal fitting, the relative movement in the axial direction is restricted. This prevents the inner cylinder fitting from coming off.

本発明において、ゴム弾性体と内筒金具の接触面の少なくとも一方の面に施される摺動処理としては、例えば、二硫化モリブデン等の摺動剤を接触面に焼き付けることによって行うことができる。また、ゴム弾性体の接触面に施す摺動処理として、例えば、天然ゴムに潤滑剤が練り込まれた自己潤滑ゴム材料でゴム弾性体を形成するようにしてもよい。自己潤滑ゴム材料で形成されたゴム弾性体は、潤滑剤が接触面にブルームすることによって、接触面の摩擦係数を小さくすることができる。   In the present invention, the sliding treatment applied to at least one of the contact surfaces of the rubber elastic body and the inner cylindrical metal fitting can be performed, for example, by baking a sliding agent such as molybdenum disulfide on the contact surface. . Further, as the sliding treatment applied to the contact surface of the rubber elastic body, for example, the rubber elastic body may be formed of a self-lubricating rubber material in which a lubricant is kneaded into natural rubber. The rubber elastic body formed of a self-lubricating rubber material can reduce the friction coefficient of the contact surface by blooming the lubricant on the contact surface.

本発明において、ゴム弾性体の内周側に内筒金具が圧入される際のゴム弾性体の圧入率は、５〜１５％とされているのが好ましい。ここでの圧入率とは、圧入後における圧入前からのゴム弾性体の厚みの縮小率のことをいい、〔（圧入前のゴム弾性体の厚み寸法）−（圧入後のゴム弾性体の厚み寸法）〕／（圧入前のゴム弾性体の厚み寸法）×１００から得られる値である。また、外筒金具の縮径加工後におけるゴム弾性体の予圧縮率は、２０〜２５％とされているのが好ましい。ここで予圧縮率とは、外筒金具の縮径加工後における圧入前からのゴム弾性体の厚みの縮小率のことをいい、〔（圧入前のゴム弾性体の厚み寸法）−（縮径加工後のゴム弾性体の厚み寸法）〕／（圧入前のゴム弾性体の厚み寸法）×１００から得られる値である。   In the present invention, it is preferable that the press-fit rate of the rubber elastic body when the inner cylinder fitting is press-fitted into the inner peripheral side of the rubber elastic body is 5 to 15%. The press-fit rate here refers to the reduction rate of the thickness of the rubber elastic body after press-fit after press-fit, [(thickness dimension of the rubber elastic body before press-fit) − (thickness of the rubber elastic body after press-fit) Dimension)] / (thickness dimension of rubber elastic body before press fit) × 100. Moreover, it is preferable that the precompression rate of the rubber elastic body after the diameter reduction processing of the outer cylinder fitting is 20 to 25%. Here, the pre-compression rate means a reduction rate of the thickness of the rubber elastic body from before the press-fitting after the diameter reduction processing of the outer cylinder fitting, [(thickness dimension of the rubber elastic body before the press-fitting) − (reduction diameter) Thickness dimension of rubber elastic body after processing)] / (thickness dimension of rubber elastic body before press fitting) × 100.

本発明において、ゴム弾性体の内周面と内筒金具の外周面とに設けられる凹部又は凸部は、内筒金具の外周面の軸方向両端部に凹部を設け、ゴム弾性体の内周面の軸方向両端部に凸部を設けるようにするのが好ましい。このようにすれば、軸方向両端部で、ゴム弾性体と内筒金具との凹凸係合状態が得られることから、抜けを効果的に防止することができる。また、外筒金具の少なくとも一端部に、端縁に近づくにつれて小径となるテーパ部を設けるようにするのが好ましい。このようにすれば、テーパ部によってゴム弾性体の端部が径方向内方に押さえ込まれるため、内筒金具の抜けをより確実に防止することができる。さらに、外筒金具の一端に、外筒金具の一端側外方に配置されるブラケットと対向するように設けられたストッパ部を有するようにすれば、外筒金具と内筒金具の軸方向の相対変位が規制されることにより、内筒金具の抜けをより確実に防止することができる。   In the present invention, the concave portion or the convex portion provided on the inner peripheral surface of the rubber elastic body and the outer peripheral surface of the inner cylindrical metal fitting are provided with concave portions at both axial ends of the outer peripheral surface of the inner cylindrical metal fitting, It is preferable to provide convex portions at both ends in the axial direction of the surface. In this way, since the concavo-convex engagement state between the rubber elastic body and the inner cylindrical metal fitting is obtained at both axial end portions, it is possible to effectively prevent disconnection. Moreover, it is preferable to provide the taper part which becomes a small diameter as it approaches an edge at least at one end part of an outer cylinder metal fitting. In this way, since the end of the rubber elastic body is pressed inward in the radial direction by the tapered portion, it is possible to more reliably prevent the inner cylinder fitting from coming off. Furthermore, if it has a stopper part provided at one end of the outer cylinder fitting so as to face a bracket disposed on the outer side of one end of the outer cylinder fitting, the axial direction of the outer cylinder fitting and the inner cylinder fitting can be reduced. By restricting the relative displacement, it is possible to more reliably prevent the inner cylinder fitting from coming off.

上記課題を解決する本発明に係る防振ブッシュの製造方法は、外筒金具の内周面に対して、自己の内周面の少なくとも１箇所に凹部又は凸部を有する筒状のゴム弾性体の外周面を加硫接着させて形成するゴム弾性体形成工程と、前記ゴム弾性体の凹部又は凸部と係合する凸部又は凹部を外周面に有する内筒金具の外周面及び前記ゴム弾性体の内周面の少なくとも一方の面に摺動処理を施す摺動処理工程と、前記ゴム弾性体の内周側に前記内筒金具を圧入して組み付ける組付け工程と、組付け工程後の前記外筒金具に対して外周側から縮径加工を施して前記ゴム弾性体に径方向の予圧縮を付与する予圧縮付与工程と、を備えていることを特徴としている。   The manufacturing method of the vibration-proof bushing according to the present invention that solves the above-described problem is a cylindrical rubber elastic body having a concave portion or a convex portion in at least one place on its inner peripheral surface with respect to the inner peripheral surface of the outer cylindrical fitting. Rubber elastic body forming step of forming the outer peripheral surface of the rubber elastic body by vulcanization and bonding, the outer peripheral surface of the inner tube fitting having the convex portion or the concave portion engaged with the concave portion or the convex portion of the rubber elastic body on the outer peripheral surface, and the rubber elasticity A sliding treatment step for subjecting at least one surface of the inner peripheral surface of the body to a sliding treatment, an assembling step for press-fitting and assembling the inner cylinder fitting on the inner circumferential side of the rubber elastic body, and an after-assembling step And a pre-compression applying step of applying a radial pre-compression to the rubber elastic body by performing a diameter reducing process on the outer cylinder fitting from an outer peripheral side.

本発明において、摺動処理工程は、例えば、二硫化モリブデン等の摺動剤をゴム弾性体の内周面に塗布したり、内筒金具の外周面に焼き付けることによって行われる。また、例えば、天然ゴムに潤滑剤が練り込まれた自己潤滑ゴム材料でゴム弾性体を形成することによって、ゴム弾性体の内周面に摺動処理を施すことも可能である。自己潤滑ゴム材料でゴム弾性体を形成することによって、ゴム弾性体の内周面にのみ摺動処理を施す場合には、摺動処理工程はゴム弾性体形成工程に含まれることとなる。   In the present invention, the sliding treatment step is performed, for example, by applying a sliding agent such as molybdenum disulfide on the inner peripheral surface of the rubber elastic body or baking it on the outer peripheral surface of the inner cylindrical metal fitting. Further, for example, by forming a rubber elastic body with a self-lubricating rubber material in which a lubricant is kneaded with natural rubber, it is possible to subject the inner peripheral surface of the rubber elastic body to a sliding treatment. When the rubber elastic body is formed of the self-lubricating rubber material and the sliding treatment is performed only on the inner peripheral surface of the rubber elastic body, the sliding treatment step is included in the rubber elastic body forming step.

本発明において、組付け工程におけるゴム弾性体の圧入率は、５〜１５％とされているのが好ましい。また、予圧縮付与工程終了後における前記ゴム弾性体の予圧縮率は、２０〜２５％とされているのが好ましい。ここでのゴム弾性体の圧入率及び予圧縮率は、上記と同じである。また、本発明においては、組付け工程終了後に、外筒金具の少なくとも一端部に、端縁に近づくにつれて小径となるテーパ部を形成するテーパ部形成工程を行うことが好ましい。このテーパ部形成工程を行うことにより、ゴム弾性体の端部が径方向内方に押さえ込まれるため、内筒金具の抜けをより確実に防止することができる。なお、このテーパ部形成工程は、予圧縮付与工程の前後に、或いは予圧縮付与工程と同時に行うことができる。   In this invention, it is preferable that the press-fit rate of the rubber elastic body in an assembly | attachment process shall be 5-15%. Moreover, it is preferable that the pre-compression rate of the rubber elastic body after the pre-compression applying step is 20 to 25%. The press-fit rate and pre-compression rate of the rubber elastic body here are the same as described above. Moreover, in this invention, it is preferable to perform the taper part formation process which forms the taper part which becomes a small diameter as it approaches an end edge in the at least one end part of an outer cylinder metal fitting after completion | finish of an assembly | attachment process. By performing the taper portion forming step, the end portion of the rubber elastic body is pressed inward in the radial direction, so that the inner cylindrical fitting can be more reliably prevented from coming off. In addition, this taper part formation process can be performed before or after a precompression provision process, or simultaneously with a precompression provision process.

本発明の防振ブッシュによれば、ゴム弾性体と内筒金具の接触面の少なくとも一方の面に摺動処理が施されているとともに、ゴム弾性体は、内周側に前記内筒金具が圧入された後、前記外筒金具の外周側から軸方向の全体にわたって前記外筒金具の縮径加工が施されることにより径方向に予圧縮されているため、軸直角方向のばね定数を高くしつつ、ねじり方向のばね定数をより低く設定し得るようにして、大きなねじり角の要求に対応することができる。また、ゴム弾性体と内筒金具は、それらの接触面に設けられた凹凸部により係合されていることにより、内筒金具の抜けを防止することができる。   According to the vibration-proof bushing of the present invention, at least one of the contact surfaces of the rubber elastic body and the inner cylinder fitting is subjected to a sliding treatment, and the rubber elastic body has the inner cylinder fitting on the inner peripheral side. After being press-fitted, since the outer cylinder fitting is subjected to diameter reduction processing from the outer peripheral side of the outer cylinder fitting to the whole in the axial direction, the spring constant in the direction perpendicular to the axis is increased. However, the spring constant in the torsion direction can be set to be lower, so that the demand for a large torsion angle can be met. Further, the rubber elastic body and the inner cylinder fitting are engaged by the concavo-convex portions provided on the contact surfaces thereof, so that the inner cylinder fitting can be prevented from coming off.

また、本発明の防振ブッシュの製造方法によれば、上記のような、ゴム弾性体形成工程と、摺動処理工程と、組付け工程と、予圧縮付与工程とを順次行うようにしているため、軸直角方向のばね定数を高くしつつ、ねじり方向のばね定数をより低く設定し得るようにして大きなねじり角の要求に対応することができ、且つ内筒金具の抜けを防止することができる防振ブッシュを簡易に得ることができる。   Moreover, according to the manufacturing method of the vibration-proof bushing of the present invention, the rubber elastic body forming step, the sliding treatment step, the assembling step, and the precompression applying step are sequentially performed. Therefore, the spring constant in the direction perpendicular to the axis can be increased while the spring constant in the torsional direction can be set lower so that the demand for a large torsion angle can be met, and the inner cylindrical fitting can be prevented from coming off. An anti-vibration bush can be easily obtained.

以下、本発明の実施形態を図面に基づいて説明する。
図１は本実施形態に係る防振ブッシュの軸方向に沿う断面図であり、図２はそ防振ブッシュに係るゴム弾性体と外筒金具が一体化された状態の軸方向に沿う断面図であり、図３はその防振ブッシュに係る内筒金具の軸方向に沿う断面図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view taken along the axial direction of the vibration isolating bushing according to the present embodiment, and FIG. 2 is a cross-sectional view taken along the axial direction in a state where the rubber elastic body and the outer tube fitting are integrated. FIG. 3 is a cross-sectional view along the axial direction of the inner cylinder fitting relating to the vibration-proof bushing.

本実施形態の防振ブッシュは、図１に示すように、外筒金具１と、外筒金具１の内周面に加硫接着されて略円筒状に形成され、自己の内周面の軸方向両端部に突条部２１、２１を有するゴム弾性体２と、ゴム弾性体２の突条部２１、２１と係合する凹溝３１、３１を外周面に有しゴム弾性体２の内周側に圧入された内筒金具３と、から構成され、ゴム弾性体２と内筒金具３がねじり方向に摺動可能にされているとともに、ゴム弾性体２に径方向の予圧縮が付与されている。   As shown in FIG. 1, the vibration-proof bushing of the present embodiment is formed in a substantially cylindrical shape by being vulcanized and bonded to the outer cylinder fitting 1 and the inner circumference surface of the outer cylinder fitting 1. The rubber elastic body 2 having the ridges 21 and 21 at both ends in the direction, and the concave grooves 31 and 31 engaging with the ridges 21 and 21 of the rubber elastic body 2 are provided on the outer peripheral surface. The inner cylindrical metal fitting 3 is press-fitted to the peripheral side, and the rubber elastic body 2 and the inner cylindrical metal fitting 3 are slidable in the torsional direction, and radial pre-compression is imparted to the rubber elastic body 2. Has been.

外筒金具１は、鉄系金属により径が略一定の円筒状に形成されており、その一端には、略直角に屈曲されて径方向外方へ延出する円環フランジ状に形成されたストッパ部１１を有する。また、外筒金具１の他端部には、端縁に近づくにつれて小径となるテーパ部１２が設けられている。なお、図１に示された外筒金具１は、製造初期のものとして示された図２の外筒金具１に対して、テーパ部１２が形成されているとともに、縮径加工が施されている。   The outer cylinder fitting 1 is formed in a cylindrical shape having a substantially constant diameter with an iron-based metal, and is formed at one end thereof in an annular flange shape that is bent at a substantially right angle and extends outward in the radial direction. A stopper 11 is provided. Moreover, the other end part of the outer cylinder metal fitting 1 is provided with the taper part 12 which becomes a small diameter as it approaches an end edge. The outer cylinder fitting 1 shown in FIG. 1 is formed with a tapered portion 12 and a diameter reducing process with respect to the outer cylinder fitting 1 shown in FIG. Yes.

ゴム弾性体２は、このゴム弾性体２を形成する加硫成形型内に外筒金具１をインサートして加硫成形を行うことにより、図２に示すように、外筒金具１と一体化されて略円筒状に形成されており、その外周面が外筒金具１の内周面に加硫接着されている。このゴム弾性体２は、天然ゴムに潤滑剤が練り込まれた自己潤滑ゴム材料で形成されている。このゴム弾性体２の内周面の軸方向両端部には、内筒金具３の外周面に設けられる凹溝 と係合するように、径方向内方に突出する突条部２１、２１が所定の幅で周方向に一周するように形成されている。   The rubber elastic body 2 is integrated with the outer cylinder fitting 1 as shown in FIG. 2 by inserting the outer cylinder fitting 1 into the vulcanization mold forming the rubber elastic body 2 and performing vulcanization molding. The outer peripheral surface is vulcanized and bonded to the inner peripheral surface of the outer tube fitting 1. This rubber elastic body 2 is formed of a self-lubricating rubber material in which a lubricant is kneaded into natural rubber. At both ends in the axial direction of the inner peripheral surface of the rubber elastic body 2, protrusions 21, 21 projecting inward in the radial direction so as to engage with concave grooves provided on the outer peripheral surface of the inner cylindrical metal fitting 3. It is formed so as to make one round in the circumferential direction with a predetermined width.

また、ゴム弾性体２の内周面の軸方向中央部には、ゴム弾性体２に付与される予圧縮を軸方向において平均化するために、径方向内方に突出する中央突条部２２が周方向に一周するように形成されている。そして、ゴム弾性体２の一端側には、外筒金具１のストッパ部１１の外側面に延出して加硫接着されたゴム緩衝部２３が所定の肉厚を有するように設けられている。このゴム弾性体２は、その内周側に内筒金具１が圧入された後、外筒金具１に縮径加工が施されることにより、径方向において２０〜２５％の範囲で予圧縮されている。   Further, a central ridge 22 projecting radially inward is provided at the axially central portion of the inner peripheral surface of the rubber elastic body 2 in order to average the precompression applied to the rubber elastic body 2 in the axial direction. Is formed so as to make one round in the circumferential direction. On one end side of the rubber elastic body 2, a rubber buffer portion 23 that extends to the outer surface of the stopper portion 11 of the outer tube fitting 1 and is vulcanized and bonded is provided so as to have a predetermined thickness. The rubber elastic body 2 is pre-compressed in a range of 20 to 25% in the radial direction by reducing the diameter of the outer cylinder fitting 1 after the inner cylinder fitting 1 is press-fitted to the inner peripheral side thereof. ing.

内筒金具３は、図１及び図３に示すように、鉄系金属により厚肉円筒状に形成されている。この内筒金具３の外周面の軸方向両端部には、ゴム弾性体２の内周面に設けられた突条部２１、２１と係合するように、径方向内方に凹んだ凹溝３１、３１が所定幅で周方向に一周するように形成されている。この内筒金具３の外周面には、摺動剤としての二硫化モリブデンを外周面全域にわたって焼き付けることにより摺動処理が施されている。この内筒金具３は、ゴム弾性体２の内周側に、ゴム弾性体２の圧入率が５〜１５％となる範囲で圧入されることにより組付けられている。これにより、内筒金具３とゴム弾性体２は、ねじり方向において摺動可能とされ、ねじり方向のばね定数が充分に低くなるように設定されている。   As shown in FIGS. 1 and 3, the inner cylinder fitting 3 is formed in a thick cylindrical shape from an iron-based metal. Grooves recessed inward in the radial direction so as to engage with protrusions 21, 21 provided on the inner peripheral surface of the rubber elastic body 2 at both axial ends of the outer peripheral surface of the inner cylindrical metal fitting 3 31 and 31 are formed with a predetermined width so as to make a round in the circumferential direction. A sliding treatment is performed on the outer peripheral surface of the inner cylindrical metal fitting 3 by baking molybdenum disulfide as a sliding agent over the entire outer peripheral surface. The inner cylinder fitting 3 is assembled by being press-fitted into the inner peripheral side of the rubber elastic body 2 in a range where the press-fit rate of the rubber elastic body 2 is 5 to 15%. Thereby, the inner cylinder fitting 3 and the rubber elastic body 2 are set to be slidable in the torsion direction, and the spring constant in the torsion direction is set to be sufficiently low.

本実施形態の防振ブッシュは、ゴム弾性体形成工程と、摺動処理工程と、組付け工程と、予圧縮付与工程と、テーパ部形成工程と、を順次行うことにより製造されている。先ず、ゴム弾性体形成工程では、一端に円環フランジ状のストッパ部１１を有する外筒金具１を準備し、ゴム弾性体２を形成する加硫成形型内にその外筒金具１をインサートし、自己潤滑ゴム材料を用いて加硫成形を行う。これにより、図２に示すように、外筒金具１の内周面に対して、自己の外周面が加硫接着されて一体化されたゴム弾性体２を形成する。このとき、ゴム弾性体２の内周面の軸方向両端部には突条部２１、２１が形成され、その内周面の軸方向中央部には中央突条部２２が形成され、その一端側にはゴム緩衝部２３が形成される。   The anti-vibration bush according to the present embodiment is manufactured by sequentially performing a rubber elastic body forming step, a sliding treatment step, an assembly step, a precompression applying step, and a tapered portion forming step. First, in the rubber elastic body forming step, an outer cylinder fitting 1 having an annular flange-shaped stopper 11 at one end is prepared, and the outer cylinder fitting 1 is inserted into a vulcanization mold for forming the rubber elastic body 2. Then, vulcanization molding is performed using a self-lubricating rubber material. As a result, as shown in FIG. 2, the rubber elastic body 2 is formed by vulcanizing and bonding the outer peripheral surface thereof to the inner peripheral surface of the outer tube fitting 1. At this time, ridges 21 and 21 are formed at both axial ends of the inner peripheral surface of the rubber elastic body 2, and a central ridge 22 is formed at the axial central portion of the inner peripheral surface. A rubber buffer portion 23 is formed on the side.

次の摺動処理工程では、外周面の軸方向両端部に凹溝３１、３１を有する所定形状に形成された内筒金具１を準備し、その内筒金具１の外周面全域にわたって、摺動剤としての二硫化モリブデンを焼き付けにより固着させて摺動処理を行う。その後、図４（ａ）に示すように、摺動処理が施された内筒金具３を、外筒金具１と一体化されたゴム弾性体２の内周側に圧入して組付けることにより組付け工程を行い、図４（ｂ）に示すように組付けられた状態の防振ブッシュを得る。このとき、ゴム弾性体２の圧入率が５〜１５％の範囲に低くされており、また、内筒金具３の外周面に摺動処理が施され、且つゴム弾性体２が自己潤滑ゴム材料で形成されていることから、圧入作業は容易に行うことができる。   In the next sliding treatment step, the inner cylindrical metal fitting 1 formed in a predetermined shape having the concave grooves 31 and 31 at both axial ends of the outer peripheral surface is prepared, and sliding is performed over the entire outer peripheral surface of the inner cylindrical metal fitting 1. A sliding treatment is performed by fixing molybdenum disulfide as an agent by baking. Thereafter, as shown in FIG. 4A, the inner cylinder fitting 3 subjected to the sliding treatment is press-fitted and assembled to the inner peripheral side of the rubber elastic body 2 integrated with the outer cylinder fitting 1. An assembling process is performed to obtain an anti-vibration bush in an assembled state as shown in FIG. At this time, the press-fit rate of the rubber elastic body 2 is lowered to a range of 5 to 15%, the outer peripheral surface of the inner cylindrical metal fitting 3 is subjected to a sliding treatment, and the rubber elastic body 2 is a self-lubricating rubber material. Therefore, the press-fitting work can be easily performed.

次の予圧縮付与工程では、八方絞り等の絞り装置を用いて、図４（ｃ）に示すように、組付け工程後の外筒金具１に対して外周側から縮径加工を施し、ゴム弾性体２に径方向の予圧縮を付与する。このとき、ゴム弾性体２には、予圧縮率が２０〜２５％となる範囲で予圧縮が付与されるようにする。そして、次のテーパ部形成工程では、かしめ装置等を用いて、外筒金具１のストッパ部１１と反対側の端部に、端縁に近づくにつれて小径となるテーパ部１２を形成する。その後、必要に応じて整形処理や仕上げ処理等を行い、図１に示すような防振ブッシュが完成する。   In the next pre-compression applying step, as shown in FIG. 4 (c), the outer cylinder fitting 1 after the assembly step is subjected to diameter reduction processing from the outer peripheral side using a drawing device such as an eight-way drawing, and rubber A radial pre-compression is applied to the elastic body 2. At this time, pre-compression is applied to the rubber elastic body 2 in a range where the pre-compression ratio is 20 to 25%. Then, in the next taper portion forming step, a taper portion 12 having a smaller diameter as the end edge is approached is formed at the end portion of the outer tube fitting 1 opposite to the stopper portion 11 using a caulking device or the like. Thereafter, shaping processing, finishing processing, and the like are performed as necessary to complete the vibration isolating bush as shown in FIG.

以上のように構成された本実施形態の防振ブッシュは、例えば図５に示すように、車両のサスペンションにおいて、ロッドやアーム等の連結部に取付けられて使用される。この場合、防振ブッシュの外筒金具１が、アーム部材５０の一端に設けられた円筒状の装着孔５１に圧入装着されている。そして、内筒金具３は、車体側に固設されたコ字形状のブラケット６０の相対向する壁部６１、６２の間に配置されて、両壁部６１、６１の挿通孔（図示せず）及び内筒金具３の内孔に挿通された取付ボルト６３及びナット６４で緊締されることによって、内筒金具３の軸方向両端が壁部６１、６２に挟持される状態に取付けられている。これにより、外筒金具１の一端に設けられたストッパ部１１が、ゴム緩衝部２３を間に介して、一方の壁部６１と所定距離を隔てて対向する状態となり、ストッパ部１１及びゴム緩衝部２３とこれらに対向する一方の壁部６１とによって、外筒金具１と内筒金具３との軸方向の過大な相対変位を規制するストッパ機構が構成されている。   The anti-vibration bushing of the present embodiment configured as described above is used by being attached to a connecting portion such as a rod or an arm in a vehicle suspension, for example, as shown in FIG. In this case, the outer cylinder fitting 1 of the vibration isolating bush is press-fitted and installed in a cylindrical mounting hole 51 provided at one end of the arm member 50. And the inner cylinder metal fitting 3 is arrange | positioned between the opposing wall parts 61 and 62 of the U-shaped bracket 60 fixedly provided by the vehicle body side, The insertion hole (not shown) of both wall parts 61 and 61 is carried out. ) And the bolts 63 and nuts 64 inserted into the inner holes of the inner cylindrical metal fitting 3, so that both ends in the axial direction of the inner cylindrical metal fitting 3 are attached to the wall portions 61 and 62. . As a result, the stopper portion 11 provided at one end of the outer cylindrical metal fitting 1 is in a state of facing the one wall portion 61 with a predetermined distance through the rubber buffer portion 23 therebetween, and the stopper portion 11 and the rubber buffer portion. A stopper mechanism that restricts excessive relative displacement in the axial direction between the outer cylinder fitting 1 and the inner cylinder fitting 3 is configured by the portion 23 and the one wall portion 61 opposed to them.

この状態に取付けられた防振ブッシュに対して、ブッシュ軸心回りのねじり方向に大きな力が作用すると、ゴム弾性体２と接触する内筒金具３の外周面に摺動処理が施され、且つゴム弾性体２が自己潤滑ゴム材料で形成されていることから、ゴム弾性体２と内筒金具３の間に滑りが発生する。そのため、ねじり方向のばね定数を大幅に低く設定することができ、大きなねじり角に対しても限界無く対応可能となる。また、ゴム弾性体２には、内筒金具３の圧入と外筒金具１の縮径とによって、常時、充分な予圧縮が付与されていることから、軸直角方向のばね定数を高く設定することができるとともに、ゴム弾性体２と内筒金具３との間にガタが発生することもない。   When a large force acts on the vibration isolating bush attached in this state in the torsional direction around the bush axis, a sliding process is performed on the outer peripheral surface of the inner cylindrical metal fitting 3 in contact with the rubber elastic body 2, and Since the rubber elastic body 2 is formed of a self-lubricating rubber material, a slip occurs between the rubber elastic body 2 and the inner tube fitting 3. Therefore, the spring constant in the torsion direction can be set to be significantly low, and a large torsion angle can be handled without limit. In addition, since the rubber elastic body 2 is always sufficiently pre-compressed by the press-fitting of the inner cylindrical fitting 3 and the reduced diameter of the outer cylindrical fitting 1, the spring constant in the direction perpendicular to the axis is set high. In addition, backlash does not occur between the rubber elastic body 2 and the inner cylinder fitting 3.

そして、ゴム弾性体２と内筒金具３は、ゴム弾性体２の内周面に設けられて突条部２１、２１と内筒金具３の外周面に設けられた凹溝３１、３１により係合されているため、軸方向の相対移動が規制されることによって内筒金具３の抜けが防止される。また、外筒金具１の他端部に設けられたテーパ部１２により、ゴム弾性体２の端部が内筒金具３の凹溝３１に押さえ込まれた状態になっていることによっても、内筒金具３の抜けが防止される。さらには、外筒金具１のストッパ部１１及びゴム緩衝部２３とブラケット６０の壁部６１とによって構成されるストッパ機構により、外筒金具１と内筒金具３との軸方向の過大な相対変位が規制されることから、内筒金具３の抜けが防止される。   The rubber elastic body 2 and the inner cylindrical metal fitting 3 are engaged by the protrusions 21, 21 provided on the inner peripheral surface of the rubber elastic body 2 and the concave grooves 31, 31 provided on the outer peripheral surface of the inner cylindrical metal fitting 3. Accordingly, the inner cylinder fitting 3 is prevented from coming off by restricting the relative movement in the axial direction. Further, the inner cylinder is also formed by the end of the rubber elastic body 2 being pressed into the groove 31 of the inner cylinder fitting 3 by the tapered portion 12 provided at the other end of the outer cylinder fitting 1. Removal of the metal fitting 3 is prevented. Furthermore, an excessive relative displacement in the axial direction between the outer cylinder fitting 1 and the inner cylinder fitting 3 is achieved by a stopper mechanism constituted by the stopper portion 11 and the rubber cushioning portion 23 of the outer cylinder fitting 1 and the wall portion 61 of the bracket 60. Is restricted, so that the inner cylinder fitting 3 is prevented from coming off.

以上のように、本実施形態の防振ブッシュは、ゴム弾性体２と接触する内筒金具３の外周面に摺動処理が施され、且つゴム弾性体２が自己潤滑ゴム材料で形成されているとともに、ゴム弾性体２は、内周側に内筒金具３が圧入された後、外筒金具１の外周側から軸方向の全体にわたって外筒金具１の縮径加工が施されることにより径方向に予圧縮されているため、軸直角方向のばね定数を高くしつつ、ねじり方向のばね定数をより低く設定し得るようにして、大きなねじり角の要求に対応することができる。また、ゴム弾性体２と内筒金具３は、それらの接触面に設けられた突条部２１、２１及び凹溝３１、３１により係合されているため、内筒金具３の抜けを防止することができる。さらには、外筒金具１の他端部にテーパ部１２が設けられていることや、外筒金具１のストッパ部１１及びゴム緩衝部２３とブラケット６０の壁部６１とによって構成されるストッパ機構を有することによって、内筒金具３の抜けをより確実に防止することができる。   As described above, the anti-vibration bushing of the present embodiment is such that the outer peripheral surface of the inner cylindrical fitting 3 that contacts the rubber elastic body 2 is subjected to a sliding process, and the rubber elastic body 2 is formed of a self-lubricating rubber material. In addition, the rubber elastic body 2 is formed by reducing the diameter of the outer cylinder fitting 1 from the outer circumference side of the outer cylinder fitting 1 to the whole in the axial direction after the inner cylinder fitting 3 is press-fitted to the inner circumference side. Since it is pre-compressed in the radial direction, the spring constant in the direction perpendicular to the axis can be increased while the spring constant in the torsion direction can be set lower to meet the demand for a large torsion angle. Moreover, since the rubber elastic body 2 and the inner cylinder metal fitting 3 are engaged by the protrusions 21 and 21 and the concave grooves 31 and 31 provided on their contact surfaces, the inner cylinder metal fitting 3 is prevented from coming off. be able to. Furthermore, a tapered portion 12 is provided at the other end of the outer tube fitting 1, and a stopper mechanism constituted by the stopper portion 11 and the rubber cushioning portion 23 of the outer tube fitting 1 and the wall portion 61 of the bracket 60. Therefore, it is possible to more reliably prevent the inner cylinder fitting 3 from coming off.

また、本実施形態の防振ブッシュの製造方法によれば、ゴム弾性体形成工程と、摺動処理工程と、組付け工程と、予圧縮付与工程と、テーパ部形成工程と、を順次行うようにしているため、軸直角方向のばね定数を高くしつつ、ねじり方向のばね定数をより低く設定し得るようにして大きなねじり角の要求に対応することができ、且つ内筒金具の抜けをより確実に防止することができる防振ブッシュを簡易に得ることができる。   Moreover, according to the manufacturing method of the vibration-proof bushing of the present embodiment, the rubber elastic body forming step, the sliding treatment step, the assembling step, the precompression applying step, and the tapered portion forming step are sequentially performed. Therefore, the spring constant in the direction perpendicular to the axis can be increased while the spring constant in the torsion direction can be set lower, so that the demand for a large torsion angle can be met, and the inner cylindrical fitting can be more easily removed. An anti-vibration bush that can be reliably prevented can be easily obtained.

本発明の実施形態に係る防振ブッシュの軸方向に沿う断面図である。It is sectional drawing which follows the axial direction of the anti-vibration bush which concerns on embodiment of this invention. 本発明の実施形態に係るゴム弾性体と外筒金具が一体化された状態の軸方向に沿う断面図である。It is sectional drawing in alignment with the axial direction of the state in which the rubber elastic body and outer cylinder metal fitting which concern on embodiment of this invention were integrated. 本発明の実施形態に係る内筒金具の軸方向に沿う断面図である。It is sectional drawing which follows the axial direction of the inner cylinder metal fitting which concerns on embodiment of this invention. 本発明の実施形態における防振ブッシュの製造工程の説明図である。It is explanatory drawing of the manufacturing process of the anti-vibration bush in embodiment of this invention. 本発明の実施形態に係る防振ブッシュの取付状態を示す断面図である。It is sectional drawing which shows the attachment state of the vibration proof bush which concerns on embodiment of this invention.

符号の説明Explanation of symbols

１…外筒金具 １１…ストッパ部 １２…テーパ部 ２…ゴム弾性体
２１…突条部 ２２…中央突条部 ２３…ゴム緩衝部 ３…内筒金具
３１…凹溝 ５０…アーム部材 ５１…装着孔 ６０…ブラケット
６１、６２…壁部 ６３…取付ボルト ６４…ナット DESCRIPTION OF SYMBOLS 1 ... Outer cylinder metal fitting 11 ... Stopper part 12 ... Tapered part 2 ... Rubber elastic body 21 ... Projection part 22 ... Center projection part 23 ... Rubber buffer part 3 ... Inner cylinder metal fitting 31 ... Groove 50 ... Arm member 51 ... Installation Hole 60 ... Bracket 61, 62 ... Wall 63 ... Mounting bolt 64 ... Nut

Claims (12)

外筒金具と、該外筒金具の内周面に加硫接着されて筒状に形成され自己の内周面の少なくとも１箇所に凹部又は凸部を有するゴム弾性体と、該ゴム弾性体の凹部又は凸部と係合する凸部又は凹部を外周面に有し前記ゴム弾性体の内周側に圧入された内筒金具と、からなり、
前記ゴム弾性体と前記内筒金具の接触面の少なくとも一方の面に摺動処理が施されているとともに、前記ゴム弾性体は、内周側に前記内筒金具が圧入された後、前記外筒金具の外周側から軸方向の全体にわたって前記外筒金具の縮径加工が施されることにより径方向に予圧縮されていることを特徴とする防振ブッシュ。 An outer cylinder fitting, a rubber elastic body that is vulcanized and bonded to the inner circumferential surface of the outer cylinder fitting and is formed into a cylindrical shape, and has a concave portion or a convex portion in at least one place on its own inner circumferential surface; An inner cylinder fitting that has a convex portion or a concave portion that engages with the concave portion or the convex portion on the outer peripheral surface and is press-fitted to the inner peripheral side of the rubber elastic body,
A sliding process is applied to at least one of the contact surfaces of the rubber elastic body and the inner cylinder fitting, and the rubber elastic body is inserted into the outer circumference after the inner cylinder fitting is press-fitted on the inner peripheral side. An anti-vibration bush characterized by being pre-compressed in the radial direction by reducing the diameter of the outer cylindrical fitting from the outer peripheral side of the cylindrical fitting to the entire axial direction. 前記内筒金具は、外周面の軸方向両端部に設けられた凹部を有し、前記ゴム弾性体の内周面には前記内筒金具の前記凹部と係合する凸部が設けられている請求項１に記載の防振ブッシュ。   The inner cylinder fitting has recesses provided at both axial ends of the outer peripheral surface, and the inner peripheral surface of the rubber elastic body is provided with a projection that engages with the recess of the inner cylinder fitting. The anti-vibration bush according to claim 1. 前記摺動処理は、前記内筒金具の外周面及び前記ゴム弾性体の内周面の少なくとも一方の面に摺動剤を固着させることにより施されている請求項１又は２に記載の防振ブッシュ。   The vibration isolation according to claim 1 or 2, wherein the sliding treatment is performed by fixing a sliding agent on at least one of an outer peripheral surface of the inner cylindrical metal fitting and an inner peripheral surface of the rubber elastic body. bush. 前記ゴム弾性体は、自己潤滑ゴム材料で形成されている請求項１又は２に記載の防振ブッシュ。   The anti-vibration bush according to claim 1 or 2, wherein the rubber elastic body is formed of a self-lubricating rubber material. 前記ゴム弾性体の内周側に前記内筒金具が圧入される際の前記ゴム弾性体の圧入率は、５〜１５％とされている請求項１〜４に記載の防振ブッシュ。   The anti-vibration bush according to any one of claims 1 to 4, wherein a press-fit rate of the rubber elastic body when the inner cylinder fitting is press-fitted into an inner peripheral side of the rubber elastic body is 5 to 15%. 前記外筒金具の縮径加工後における前記ゴム弾性体の予圧縮率は、２０〜２５％とされている請求項１〜５に記載の防振ブッシュ。   The anti-vibration bushing according to claim 1, wherein a pre-compression rate of the rubber elastic body after the diameter reduction processing of the outer cylinder fitting is 20 to 25%. 前記外筒金具は、少なくとも一端部に端縁に近づくにつれて小径となるテーパ部を有する請求項１〜６に記載の防振ブッシュ。   The anti-vibration bush according to any one of claims 1 to 6, wherein the outer cylinder fitting has a tapered portion having a diameter that decreases toward an end edge at least at one end portion. 前記外筒金具は、他端から径方向外方に延出して前記外筒金具の他端側外方に配置されるブラケットと対向するように設けられたストッパ部を有する請求項１〜７に記載の防振ブッシュ。   The said outer cylinder metal fitting has a stopper part provided so that it might extend in the radial direction outward from the other end, and might be opposed to the bracket arrange | positioned on the other end side outer side of the said outer cylinder metal fitting. Anti-vibration bush described. 外筒金具の内周面に対して、自己の内周面の少なくとも１箇所に凹部又は凸部を有する筒状のゴム弾性体の外周面を加硫接着させて形成するゴム弾性体形成工程と、
前記ゴム弾性体の凹部又は凸部と係合する凸部又は凹部を外周面に有する内筒金具の外周面及び前記ゴム弾性体の内周面の少なくとも一方の面に摺動処理を施す摺動処理工程と、
前記ゴム弾性体の内周側に前記内筒金具を圧入して組付ける組付け工程と、
組付け工程後の前記外筒金具に対して外周側から縮径加工を施して前記ゴム弾性体に径方向の予圧縮を付与する予圧縮付与工程と、
を備えていることを特徴とする防振ブッシュの製造方法。 A rubber elastic body forming step of forming an outer peripheral surface of a cylindrical rubber elastic body having a concave portion or a convex portion in at least one place on the inner peripheral surface of the outer cylindrical metal member by vulcanization bonding; ,
Sliding that applies a sliding process to at least one of the outer peripheral surface of the inner cylindrical metal fitting having the convex or concave portion engaged with the concave or convex portion of the rubber elastic body on the outer peripheral surface and the inner peripheral surface of the rubber elastic body Processing steps;
An assembling step for press-fitting and assembling the inner cylinder fitting to the inner peripheral side of the rubber elastic body;
A pre-compression applying step of applying a radial pre-compression to the rubber elastic body by reducing the diameter of the outer tube fitting after the assembly step from the outer peripheral side;
A method for manufacturing an anti-vibration bush, comprising: 前記組付け工程における前記ゴム弾性体の圧入率は、５〜１５％とされている請求項９に記載の防振ブッシュの製造方法。   The method for manufacturing a vibration-proof bushing according to claim 9, wherein a press-fit rate of the rubber elastic body in the assembling step is 5 to 15%. 前記予圧縮付与工程終了後における前記ゴム弾性体の予圧縮率は、２０〜２５％とされている請求項９又は１０に記載の防振ブッシュの製造方法。   The method for manufacturing a vibration-isolating bush according to claim 9 or 10, wherein a pre-compression rate of the rubber elastic body after completion of the pre-compression applying step is 20 to 25%. 前記組付け工程終了後において、前記外筒金具の少なくとも一端部に、端縁に近づくにつれて小径となるテーパ部を形成するテーパ部形成工程を有する請求項９〜１１に記載の防振ブッシュの製造方法。   The vibration-proof bushing according to any one of claims 9 to 11, further comprising a taper portion forming step of forming a taper portion having a smaller diameter as approaching an end edge at least one end portion of the outer cylinder fitting after the assembly step. Method.
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009008118A (en) * 2007-06-26 2009-01-15 Kurashiki Kako Co Ltd Rubber bushing
JP2010084807A (en) * 2008-09-30 2010-04-15 Tokai Rubber Ind Ltd Cylindrical vibration control assembly
JP2011007257A (en) * 2009-06-25 2011-01-13 Toyo Tire & Rubber Co Ltd Vibration absorbing bush
JP2013223387A (en) * 2012-04-19 2013-10-28 Auto Network Gijutsu Kenkyusho:Kk Electric connection box
CN105121894A (en) * 2013-06-27 2015-12-02 住友理工株式会社 Vibration-proof bush and method for manufacturing vibration-proof bush
WO2019180896A1 (en) * 2018-03-22 2019-09-26 住友理工株式会社 Tubular motor mount for electric vehicle, and method of manufacturing same
KR102033154B1 (en) * 2018-04-30 2019-11-29 평화산업주식회사 Suspension bush structure of electric vehicle
CN112776581A (en) * 2021-03-03 2021-05-11 四川建安工业有限责任公司 New energy automobile sub vehicle frame suspension bush assembly structure
US11383591B2 (en) 2019-06-10 2022-07-12 Hyundai Motor Company Roll mount device for vehicle

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009008118A (en) * 2007-06-26 2009-01-15 Kurashiki Kako Co Ltd Rubber bushing
JP2010084807A (en) * 2008-09-30 2010-04-15 Tokai Rubber Ind Ltd Cylindrical vibration control assembly
JP2011007257A (en) * 2009-06-25 2011-01-13 Toyo Tire & Rubber Co Ltd Vibration absorbing bush
JP2013223387A (en) * 2012-04-19 2013-10-28 Auto Network Gijutsu Kenkyusho:Kk Electric connection box
CN105121894A (en) * 2013-06-27 2015-12-02 住友理工株式会社 Vibration-proof bush and method for manufacturing vibration-proof bush
WO2019180896A1 (en) * 2018-03-22 2019-09-26 住友理工株式会社 Tubular motor mount for electric vehicle, and method of manufacturing same
JPWO2019180896A1 (en) * 2018-03-22 2021-02-04 住友理工株式会社 Cylindrical motor mounts for electric vehicles and their manufacturing methods
JP7079784B2 (en) 2018-03-22 2022-06-02 住友理工株式会社 Cylindrical motor mount for electric vehicles
KR102033154B1 (en) * 2018-04-30 2019-11-29 평화산업주식회사 Suspension bush structure of electric vehicle
US11383591B2 (en) 2019-06-10 2022-07-12 Hyundai Motor Company Roll mount device for vehicle
CN112776581A (en) * 2021-03-03 2021-05-11 四川建安工业有限责任公司 New energy automobile sub vehicle frame suspension bush assembly structure

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