JP2012202460A - Vibration control device - Google Patents

Vibration control device Download PDF

Info

Publication number
JP2012202460A
JP2012202460A JP2011066468A JP2011066468A JP2012202460A JP 2012202460 A JP2012202460 A JP 2012202460A JP 2011066468 A JP2011066468 A JP 2011066468A JP 2011066468 A JP2011066468 A JP 2011066468A JP 2012202460 A JP2012202460 A JP 2012202460A
Authority
JP
Japan
Prior art keywords
cylindrical portion
diameter
small
vibration
cylinder member
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.)
Granted
Application number
JP2011066468A
Other languages
Japanese (ja)
Other versions
JP5913821B2 (en
Inventor
Yoshiyuki Saihara
義之 才原
Yoshitaka Ishimoto
善隆 石本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Priority to JP2011066468A priority Critical patent/JP5913821B2/en
Publication of JP2012202460A publication Critical patent/JP2012202460A/en
Application granted granted Critical
Publication of JP5913821B2 publication Critical patent/JP5913821B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Springs (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device capable of restraining a bonding interface from being broken in an axial end part of an outer cylindrical member, while enhancing durability of a vibration control base body, by executing diameter contracting-directional drawing to the outer cylindrical member.SOLUTION: The outer cylindrical member 20 includes a small-diametric cylindrical part 21, and a large-diametric cylindrical part 22 formed into a large diameter larger than that of the small-diametric cylindrical part 21, and the drawing is executed only in the large-diametric cylindrical part 22.

Description

本発明は、防振装置に関し、特に、外筒部材に縮径方向への絞り加工を施して、防振基体の耐久性の向上を図りつつ、外筒部材の軸方向端部における接着界面の破壊を抑制することができる防振装置に関するものである。   The present invention relates to a vibration isolator, and in particular, the outer cylinder member is subjected to a drawing process in a reduced diameter direction to improve the durability of the vibration isolator base, and the adhesive interface at the axial end of the outer cylinder member is improved. The present invention relates to a vibration isolator capable of suppressing destruction.

筒状の内筒部材と、その内筒部材を同軸状に取り囲む筒状の外筒部材と、それら内筒部材および外筒部材を連結すると共にゴム状弾性体から構成される防振基体とを備えた防振装置が、例えば、自動車のサスペンション装置に用いられる。   A cylindrical inner cylinder member, a cylindrical outer cylinder member that surrounds the inner cylinder member coaxially, and an anti-vibration base that connects the inner cylinder member and the outer cylinder member and is formed of a rubber-like elastic body. The provided vibration isolator is used, for example, in an automobile suspension device.

このように、内筒部材と外筒部材との間を防振基体により連結する防振装置では、防振基体の加硫成形後の収縮を取り除く、さらには、予備圧縮を付与して、耐久性を向上させるために、絞り金型を用いて外筒部材に縮径方向への絞り加工を施すことが行われる(特許文献1)。   In this way, in the vibration isolator that connects the inner cylinder member and the outer cylinder member with the vibration isolator base, the shrinkage after the vulcanization molding of the vibration isolator base is removed, and further, the pre-compression is applied to provide durability. In order to improve the property, the outer cylinder member is drawn in the diameter reducing direction using a drawing die (Patent Document 1).

特開2008−232195号公報(図12、段落[0020]など)JP 2008-232195A (FIG. 12, paragraph [0020], etc.)

しかしながら、上述した従来の防振装置では、耐久性の向上を十分に図るために、外筒部材に大きな絞り率の絞り加工を施すと、外筒部材の軸方向端部のひずみが大きくなり、その外筒部材の軸方向端部において接着界面が破壊されるという問題点があった。軸方向端部の接着界面が破壊されると、外筒部材に発生した錆が接着界面へ進行して、接着剥離を招く。   However, in the above-described conventional vibration isolator, in order to sufficiently improve the durability, if the outer cylinder member is subjected to a drawing process with a large drawing ratio, the distortion of the axial end of the outer cylinder member increases, There was a problem that the adhesion interface was destroyed at the axial end of the outer cylinder member. When the adhesive interface at the end in the axial direction is destroyed, rust generated in the outer cylinder member proceeds to the adhesive interface, causing adhesion peeling.

本発明は上述した問題点を解決するためになされたものであり、外筒部材に縮径方向への絞り加工を施して、防振基体の耐久性の向上を図りつつ、外筒部材の軸方向端部における接着界面の破壊を抑制することができる防振装置を提供することを目的としている。   The present invention has been made to solve the above-described problems. The shaft of the outer cylinder member is formed while the outer cylinder member is subjected to a drawing process in the diameter reducing direction to improve the durability of the vibration-proof base. It aims at providing the vibration isolator which can suppress the destruction of the adhesion interface in a direction edge part.

課題を解決するための手段および発明の効果Means for Solving the Problems and Effects of the Invention

請求項1記載の防振装置によれば、外筒部材は、軸方向両端に位置する筒状の小径筒部と、その小径筒部の間に位置し小径筒部よりも大径に形成される筒状の大径筒部と、それら大径筒部および小径筒部を連結し大径筒部から小径筒部へ向けて漸次縮径する傾斜筒部とを備え、防振基体は、少なくとも前記防振基体の大径筒部、傾斜筒部および小径筒部の内周面に加硫接着されて、内筒部材と外筒部材とを連結し、絞り金型を用いた絞り加工が外筒部材の傾斜筒部および小径筒部を除き大径筒部のみに施されているので、防振基体の耐久性の向上を図りつつ、外筒部材の軸方向端部における接着界面の破壊を抑制することができるという効果がある。   According to the vibration isolator of the first aspect, the outer cylinder member is formed between the cylindrical small-diameter cylindrical portion located at both ends in the axial direction and the larger diameter than the small-diameter cylindrical portion located between the small-diameter cylindrical portions. A cylindrical large-diameter cylindrical portion, and an inclined cylindrical portion that connects the large-diameter cylindrical portion and the small-diameter cylindrical portion and gradually reduces the diameter from the large-diameter cylindrical portion to the small-diameter cylindrical portion, Vulcanized and bonded to the inner peripheral surfaces of the large-diameter cylindrical portion, the inclined cylindrical portion, and the small-diameter cylindrical portion of the anti-vibration base to connect the inner cylindrical member and the outer cylindrical member. Since it is applied only to the large-diameter cylindrical portion except for the inclined cylindrical portion and the small-diameter cylindrical portion of the cylindrical member, the adhesive interface at the axial end of the outer cylindrical member is destroyed while improving the durability of the vibration isolating base. There is an effect that it can be suppressed.

即ち、外筒部材の大径筒部に比較的大きな絞り率の絞り加工が施されることで、外筒部材の大径筒部の内周面に加硫接着されている防振基体部分の加硫成形後の収縮を取り除いてその耐久性の向上を図りつつ、外筒部材の小径筒部のひずみは低減して、その小径筒部の内周面に加硫接着されている防振基体部分の接着界面の破壊を抑制することができるという効果がある。   That is, by drawing a relatively large drawing ratio on the large-diameter cylindrical portion of the outer cylinder member, the vibration-isolating base portion bonded to the inner peripheral surface of the large-diameter cylindrical portion of the outer cylindrical member is obtained. The anti-vibration base is vulcanized and bonded to the inner peripheral surface of the small-diameter cylindrical portion while reducing the distortion of the small-diameter cylindrical portion of the outer cylindrical member while eliminating the shrinkage after vulcanization molding and improving its durability. There is an effect that it is possible to suppress the destruction of the adhesive interface of the part.

一方で、大径筒部に比較的大きな絞り率の絞り加工が施されると、その大径筒部の塑性変形が傾斜筒部によって緩衝されつつ、外筒部材の小径筒部にも伝達され、小径筒部も比較的小さな絞り率で縮径される。これにより、外筒部材の小径筒部の内周面に加硫接着されている防振基体部分の加硫成形後の収縮を緩和して、その耐久性の向上も図ることができるという効果がある。   On the other hand, when a drawing process with a relatively large drawing ratio is applied to the large-diameter cylindrical part, the plastic deformation of the large-diameter cylindrical part is transmitted to the small-diameter cylindrical part of the outer cylindrical member while being buffered by the inclined cylindrical part. The small-diameter cylindrical portion is also reduced in diameter with a relatively small aperture ratio. As a result, the effect of reducing the shrinkage after vulcanization molding of the anti-vibration base portion vulcanized and bonded to the inner peripheral surface of the small-diameter cylindrical portion of the outer cylindrical member and improving its durability can be achieved. is there.

請求項2記載の防振装置によれば、請求項1記載の防振装置の奏する効果に加え、防振基体は、外筒部材の小径筒部の内周面に加硫接着された防振基体部分に連なり少なくとも小径筒部の軸方向端面に加硫接着される膜部を備えるので、内筒部材が外筒部材に対して軸方向へ相対的に大変位した場合でも、膜部の端部に引張力が作用することを抑制することができ、その結果、膜部の端部と小径筒部との間の接着剥離を抑制して、耐久性の向上を図ることができるという効果がある。   According to the vibration isolator according to claim 2, in addition to the effect of the vibration isolator according to claim 1, the vibration isolating base is vulcanized and bonded to the inner peripheral surface of the small diameter cylindrical portion of the outer cylinder member. Since the membrane portion is connected to the base portion and is vulcanized and bonded to at least the axial end surface of the small-diameter cylindrical portion, the end of the membrane portion can be obtained even when the inner cylindrical member is largely displaced in the axial direction relative to the outer cylindrical member. It is possible to suppress the tensile force from acting on the part, and as a result, it is possible to suppress the adhesion peeling between the end of the film part and the small-diameter cylindrical part, and to improve the durability. is there.

また、防振基体に連なる膜部が小径筒部の軸方向端部まで延設されることで、その分、接着面積を拡大することができる。よって、仮に膜部の端部から接着剥離が発生した場合でも、接着面積が拡大されている分、接着剥離が防振基体まで到達することを抑制して、耐久性の向上を図ることができるという効果がある。   Further, since the film portion connected to the vibration isolating base is extended to the axial end portion of the small-diameter cylindrical portion, the bonding area can be increased accordingly. Therefore, even if the adhesion peeling occurs from the end of the film part, the adhesion area can be increased and the durability can be improved by preventing the adhesion peeling from reaching the vibration-proof substrate. There is an effect.

請求項3記載の防振装置によれば、請求項2記載の防振装置の奏する効果に加え、防振基体の膜部は、外筒部材の小径筒部の内周面に加硫接着された防振基体部分に連なりつつ小径筒部の軸方向端面および小径筒部の外周面に加硫接着されるので、耐久性のより一層の向上を図ることができるという効果がある。   According to the vibration isolator described in claim 3, in addition to the effect produced by the vibration isolator described in claim 2, the film portion of the vibration isolator base is vulcanized and bonded to the inner peripheral surface of the small diameter cylindrical portion of the outer cylindrical member. Further, since it is vulcanized and bonded to the axial end surface of the small-diameter cylindrical portion and the outer peripheral surface of the small-diameter cylindrical portion while continuing to the anti-vibration base portion, there is an effect that the durability can be further improved.

即ち、防振基体の膜部は、小径筒部の内周面に加硫接着された防振基体部分から、小径筒部の軸方向端面を越え、小径筒部の外周面まで延設されるので、内筒部材が外筒部材に対して軸方向へ相対的に大変位した場合でも、膜部の端部に引張力が作用することをより確実に抑制することができる。その結果、膜部の端部と小径筒部との間の接着剥離を抑制して、耐久性の向上を図ることができるという効果がある。   That is, the film portion of the vibration-isolating base extends from the vibration-proof base portion vulcanized and bonded to the inner peripheral surface of the small-diameter cylindrical portion over the axial end surface of the small-diameter cylindrical portion to the outer peripheral surface of the small-diameter cylindrical portion. Therefore, even when the inner cylinder member is relatively displaced in the axial direction relative to the outer cylinder member, it is possible to more reliably suppress the tensile force from acting on the end of the film part. As a result, there is an effect that it is possible to suppress the adhesion peeling between the end portion of the film portion and the small diameter cylindrical portion and to improve the durability.

また、防振基体に連なる膜部が小径筒部の軸方向端部を越えて外周面まで延設されることで、その分、接着面積をより拡大することができる。よって、仮に膜部の端部から接着剥離が発生した場合でも、接着面積が拡大されている分、接着剥離が防振基体まで到達することを抑制して、耐久性の向上を図ることができるという効果がある。   In addition, since the film portion connected to the vibration isolating base extends beyond the end portion in the axial direction of the small-diameter cylindrical portion to the outer peripheral surface, the bonding area can be further increased accordingly. Therefore, even if the adhesion peeling occurs from the end of the film part, the adhesion area can be increased and the durability can be improved by preventing the adhesion peeling from reaching the vibration-proof substrate. There is an effect.

請求項4記載の防振装置によれば、請求項3記載の防振装置の奏する効果に加え、外筒部材の傾斜筒部は、切削加工が施されることで軸方向に直交し軸方向視円環状に形成される平坦面部を備えるので、防振基体を加硫金型により加硫成形する際には、傾斜筒部の平坦面部を加硫金型に当接させるシール面として利用して、加硫成形時のシール性の向上を図ることができるという効果がある。これにより、膜部を外筒部材の外周面側まで延設させた場合でも、外筒部材の大径筒部の外周面へのゴム載り(ゴムバリの付着)を抑制できるので、外筒部材を相手部材へ圧入する際の圧入荷重の増加あるいは圧入後の抜け荷重の減少を抑制できるという効果がある。   According to the vibration isolator of the fourth aspect, in addition to the effect produced by the vibration isolator of the third aspect, the inclined cylindrical portion of the outer cylinder member is orthogonal to the axial direction by being subjected to the cutting process, and the axial direction. Since it has a flat surface portion formed in an annular shape, when the vibration-proof base is vulcanized by a vulcanization mold, it is used as a seal surface that abuts the flat surface portion of the inclined cylinder portion on the vulcanization mold. Thus, there is an effect that the sealing property at the time of vulcanization molding can be improved. Thereby, even when the film part is extended to the outer peripheral surface side of the outer cylinder member, it is possible to suppress the rubber from being put on the outer peripheral surface of the large diameter cylindrical part of the outer cylinder member (attachment of rubber burr). There is an effect that it is possible to suppress an increase in press-fitting load when press-fitting into the mating member or a decrease in a drop load after press-fitting.

本発明の第1実施の形態における防振装置の車両への装着状態を示す断面図である。It is sectional drawing which shows the mounting state to the vehicle of the vibration isolator in 1st Embodiment of this invention. (a)は、防振装置の上面図であり、(b)は、図2(a)のIIb−IIb線における防振装置の断面図である。(A) is a top view of a vibration isolator, (b) is sectional drawing of the vibration isolator in the IIb-IIb line | wire of Fig.2 (a). 内筒部材および外筒部材が設置されて型締めされた加硫金型の断面図である。It is sectional drawing of the vulcanization metal mold | die in which the inner cylinder member and the outer cylinder member were installed and clamped. 絞り金型および第1成形体の断面図である。It is sectional drawing of a drawing die and a 1st molded object. (a)は、第2実施の形態における防振装置の上面図であり、(b)は、図5(a)のVb−Vb線における防振装置の断面図である。(A) is a top view of the vibration isolator in 2nd Embodiment, (b) is sectional drawing of the vibration isolator in the Vb-Vb line | wire of Fig.5 (a). 図5(b)の一部を部分的に拡大した防振装置の部分拡大断面図である。It is the elements on larger scale of the vibration isolator which expanded a part of Drawing 5 (b) partially. (a)は、切削加工が施される前の状態における外筒部材の断面図であり、(b)は、切削加工が施された後の状態における外筒部材の断面図である。(A) is sectional drawing of the outer cylinder member in the state before a cutting process is performed, (b) is sectional drawing of the outer cylinder member in the state after a cutting process is performed. 内筒部材および外筒部材が設置されて型締めされた加硫金型の断面図である。It is sectional drawing of the vulcanization metal mold | die in which the inner cylinder member and the outer cylinder member were installed and clamped. 図8の一部を部分的に拡大した加硫金型の部分拡大断面図である。FIG. 9 is a partially enlarged cross-sectional view of a vulcanization mold in which a part of FIG. 8 is partially enlarged. (a)から(c)は、第3実施の形態から第5実施の形態における防振装置の部分拡大断面図である。(A)-(c) is the elements on larger scale of the vibration isolator in 3rd Embodiment to 5th Embodiment.

以下、本発明の好ましい実施例について、添付図面を参照して説明する。図1は、本発明の第1実施の形態における防振装置1の車両への装着状態を示す断面図である。   Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a state in which the vibration isolator 1 according to the first embodiment of the present invention is mounted on a vehicle.

図1に示すように、防振装置1は、自動車のサスペンション機構(懸架機構、図示せず)に装着されるブッシュであり、筒状に形成される内筒部材10と、その内筒部材10の外周側を取り囲む筒状に形成される外筒部材20と、それら内筒部材10及び外筒部材20を連結する防振基体30とを備え、本実施の形態では、サスペンションアームSAと車体側の一対の取付板MPとの間に介在する。   As shown in FIG. 1, the vibration isolator 1 is a bush attached to a suspension mechanism (suspension mechanism, not shown) of an automobile, and includes an inner cylinder member 10 formed in a cylindrical shape, and the inner cylinder member 10. And an anti-vibration base 30 that connects the inner cylinder member 10 and the outer cylinder member 20. In this embodiment, the suspension arm SA and the vehicle body side are provided. Between the pair of mounting plates MP.

即ち、防振装置1は、サスペンションアームSAの圧入部に外筒部材20を軸方向に圧入固定すると共に、一方の取付板MP(図1右側)の挿通孔から内筒部材10の内部にボルトBを挿通し、他方の取付板MP(図1左側)の挿通孔から突出されたボルトBのおねじ部にナットNを螺合させて締め付け、一対の取付板MP間に軸方向(図1左右方向)両側から挟持された状態で内筒部材10を締結固定することで、サスペンション機構に装着される。   That is, the vibration isolator 1 presses and fixes the outer cylinder member 20 in the press-fitting portion of the suspension arm SA in the axial direction, and bolts are inserted into the inner cylinder member 10 from the insertion hole of one mounting plate MP (right side in FIG. 1). B is inserted, and a nut N is screwed into a male screw portion of the bolt B protruding from the insertion hole of the other mounting plate MP (left side in FIG. 1) and tightened, and axially (see FIG. 1) between the pair of mounting plates MP. (Right and left direction) The inner cylinder member 10 is fastened and fixed while being clamped from both sides, so that it is mounted on the suspension mechanism.

次いで、図2を参照して、防振装置1の詳細構成について説明する。図2(a)は、防振装置1の上面図であり、図2(b)は、図2(a)のIIb−IIb線における防振装置1の断面図である。なお、図2では、外筒部材20の大径筒部22に絞り加工が施された後の状態(即ち、完成状態における防振装置1)が図示される。   Next, the detailed configuration of the vibration isolator 1 will be described with reference to FIG. 2A is a top view of the vibration isolator 1, and FIG. 2B is a cross-sectional view of the vibration isolator 1 taken along the line IIb-IIb in FIG. 2A. 2 shows a state after the drawing process is performed on the large-diameter cylindrical portion 22 of the outer cylindrical member 20 (that is, the vibration isolator 1 in the completed state).

図2に示すように、防振装置1は、鉄鋼材料から軸Oを有する筒状に形成される内筒部材10と、鉄鋼材料から軸Oを有する筒状に形成され内筒部材10と同軸状に配置される外筒部材20と、それら内筒部材10の外周面および外筒部材20の内周面の間を連結すると共にゴム状弾性体から形成される防振基体30とを備える。なお、内筒部材10の軸方向端面には、セレーション状の突起が突設される。   As shown in FIG. 2, the vibration isolator 1 includes an inner cylinder member 10 formed in a cylindrical shape having an axis O from a steel material, and a cylindrical shape formed from a steel material having an axis O and coaxial with the inner cylinder member 10. And an anti-vibration base 30 formed of a rubber-like elastic body and connected between the outer peripheral surface of the inner cylindrical member 10 and the inner peripheral surface of the outer cylindrical member 20. A serrated protrusion is provided on the axial end surface of the inner cylinder member 10.

なお、内筒部材10と外筒部材20とが同軸状に配置されるとは、少なくとも両部材10,20の軸が平行となる状態であれば足り、両部材10,20の軸が一致していることを要求する趣旨ではない。請求項に記載した同軸状についても同様の趣旨である。   It should be noted that the inner cylinder member 10 and the outer cylinder member 20 are disposed coaxially as long as at least the axes of both the members 10 and 20 are parallel to each other, and the axes of both the members 10 and 20 coincide. It does not mean that it is required. The same is true for the coaxial shape described in the claims.

外筒部材20は、軸方向両端にそれぞれ位置する筒状の小径筒部21と、それら小径筒部21の間に位置し小径筒部よりも大径に形成される筒状の大径筒部22と、それら大径筒部22及び小径筒部21の間をそれぞれ連結し大径筒部22から小径筒部21へ向けて漸次縮径される円錐筒状の傾斜筒部23とを備え、これら各筒部21〜23が同軸に配置される。   The outer cylinder member 20 includes a cylindrical small-diameter cylindrical part 21 positioned at both ends in the axial direction, and a cylindrical large-diameter cylindrical part positioned between the small-diameter cylindrical parts 21 and having a larger diameter than the small-diameter cylindrical part. 22 and a conical tube-shaped inclined tube portion 23 that is connected between the large-diameter tube portion 22 and the small-diameter tube portion 21 and is gradually reduced in diameter from the large-diameter tube portion 22 toward the small-diameter tube portion 21, These cylinder parts 21-23 are arrange | positioned coaxially.

なお、傾斜筒部23は、小径筒部21との連結部分および大径筒部22との接続部分のそれぞれが断面円弧状に湾曲して滑らかに連結される。本実施の形態では、小径筒部21の外周面の外径寸法は、大径筒部22の内周面の内径寸法よりも大きくされる。これは、大径筒部22に絞り加工を施す前後において同様である。   In addition, the inclined cylinder part 23 is smoothly connected with each of a connecting part with the small diameter cylinder part 21 and a connecting part with the large diameter cylinder part 22 being curved in an arcuate cross section. In the present embodiment, the outer diameter of the outer peripheral surface of the small diameter cylindrical portion 21 is made larger than the inner diameter of the inner peripheral surface of the large diameter cylindrical portion 22. This is the same before and after the large diameter cylindrical portion 22 is drawn.

防振基体30は、軸O周りに全周にわたって、内筒部材10の外周面と外筒部材20の内周面とに加硫接着される。なお、防振基体30は、外筒部材20の小径筒部21、大径筒部22及び傾斜筒部23のそれぞれの内周面に加硫接着される。また、防振基体30と内筒部材10との加硫接着領域は、外筒部材20を内筒部材10の外周面に軸直角方向に投影して形成される領域よりも大きくされる。   The anti-vibration base 30 is vulcanized and bonded to the outer peripheral surface of the inner cylinder member 10 and the inner peripheral surface of the outer cylinder member 20 over the entire circumference around the axis O. The vibration isolating base 30 is vulcanized and bonded to the inner peripheral surfaces of the small diameter cylindrical portion 21, the large diameter cylindrical portion 22 and the inclined cylindrical portion 23 of the outer cylindrical member 20. Further, the vulcanization adhesion region between the vibration isolating base 30 and the inner cylinder member 10 is made larger than the region formed by projecting the outer cylinder member 20 onto the outer peripheral surface of the inner cylinder member 10 in the direction perpendicular to the axis.

防振基体30の軸方向端面(図2(b)上側および下側の面)には、断面円弧状の凹部として形成されると共に軸O周りに全周にわたって連続するすぐり部31が凹設される。すぐり部31は、本実施の形態では、外筒部材20の大径筒部22と傾斜筒部23との連結部分に略一致する位置まで凹設される。これにより、外筒部材20の大径筒部22の内周面と内筒部材10の外周面との間が全て防振基体30により連結される。   On the axial end surfaces (upper and lower surfaces in FIG. 2B) of the vibration isolating base 30, a straight portion 31 that is formed as a concave portion having an arcuate cross section and continues around the axis O is provided. The In the present embodiment, the straight portion 31 is recessed to a position that substantially matches the connecting portion between the large-diameter cylindrical portion 22 and the inclined cylindrical portion 23 of the outer cylindrical member 20. Thereby, the inner peripheral surface of the large-diameter cylindrical portion 22 of the outer cylindrical member 20 and the outer peripheral surface of the inner cylindrical member 10 are all connected by the vibration isolation base 30.

また、防振基体30のすぐり部31は、内筒部材10側の側面が傾斜して形成され、これにより、防振基体30のすぐり部31よりも内筒部材10側の部分が、内筒部材10の軸方向端面へ向けて厚み寸法(図2(b)左右方向寸法)が漸次小さくなる断面三角形状に形成される。   Further, the straight portion 31 of the vibration isolating base 30 is formed so that the side surface on the inner cylinder member 10 side is inclined, so that the portion closer to the inner cylindrical member 10 than the straight portion 31 of the vibration isolating base 30 is the inner cylinder. The thickness dimension (dimension in the left-right direction in FIG. 2 (b)) gradually decreases toward the end face in the axial direction of the member 10.

一方、防振基体30のすぐり部31は、外筒部材20側の側面が軸Oに沿って平行に形成され、これにより、防振基体30のすぐり部31よりも外筒部材20側の部分(特に、外筒部材20の小径筒部21の内周面に加硫接着される部分)が、軸方向に沿って一定の厚み寸法(図2(b)左右方向寸法)を有する膜状に形成される。   On the other hand, the straight portion 31 of the vibration isolation base 30 has a side surface on the outer cylinder member 20 side formed in parallel along the axis O, whereby the portion of the vibration isolation base 30 closer to the outer cylinder member 20 than the straight portion 31 of the vibration isolation base 30 is formed. (Particularly, the portion vulcanized and bonded to the inner peripheral surface of the small-diameter cylindrical portion 21 of the outer cylindrical member 20) is formed into a film shape having a certain thickness dimension (dimension in the left-right direction in FIG. 2B) along the axial direction. It is formed.

次いで、図3及び図4を参照して、防振装置1の製造方法について説明する。防振装置1の製造は、まず、加硫工程を行い、第1成形体FBを成形し、次いで、絞り工程へ移行し、第1成形体FBの外筒部材20に絞り加工を施すことで、行われる。   Next, a method for manufacturing the vibration isolator 1 will be described with reference to FIGS. 3 and 4. The vibration isolator 1 is manufactured by first performing a vulcanization process, forming the first molded body FB, and then proceeding to a drawing process, and drawing the outer cylinder member 20 of the first molded body FB. Done.

まず、図3を参照して、加硫工程について説明する。図3は、内筒部材10及び外筒部材20が設置されて型締めされた加硫金型50の断面図であり、キャビティ内にゴム状弾性体が注入される前の状態が図示される。   First, the vulcanization process will be described with reference to FIG. FIG. 3 is a cross-sectional view of the vulcanization mold 50 in which the inner cylinder member 10 and the outer cylinder member 20 are installed and clamped, and illustrates a state before the rubber-like elastic body is injected into the cavity. .

なお、図3では、加硫金型50に形成される注入孔の図示が省略される。また、図3に示す内筒部材10及び外筒部材20の断面は、図2(b)に示す断面に対応する。但し、図3に示す外筒部材20は絞り加工が施される前の状態が図示される。   In FIG. 3, the illustration of the injection holes formed in the vulcanization mold 50 is omitted. Moreover, the cross section of the inner cylinder member 10 and the outer cylinder member 20 shown in FIG. 3 respond | corresponds to the cross section shown in FIG.2 (b). However, the outer cylinder member 20 shown in FIG. 3 is in a state before drawing.

図3に示すように、加硫金型50は、第1成形体FBを加硫成形するための金型であり、上下(図3上下方向であって内筒部材10及び外筒部材20の軸方向)に型締めされる上型51及び下型52を備え、加硫工程において、型締めにより形成されたキャビティ内に注入孔(図示せず)から注入されて充填されたゴム状弾性体を加硫することで、第1成形体FB(図4参照)を成形する。   As shown in FIG. 3, the vulcanization mold 50 is a mold for vulcanizing the first molded body FB, and is vertically (in the vertical direction of FIG. 3, the inner cylinder member 10 and the outer cylinder member 20. A rubber-like elastic body provided with an upper mold 51 and a lower mold 52 clamped in the axial direction) and filled by injection from an injection hole (not shown) into a cavity formed by mold clamping in the vulcanization process The first molded body FB (see FIG. 4) is molded by vulcanizing.

上型51は、第1成形体FBの軸方向一側(図3下側)の外形を形成するための部位であり、内筒部材10の内周に挿入される上型ピン51aと、その上型ピン51aの周囲に正面視円環状の溝として凹設され内筒部材10の軸方向端部(図3上側)が内嵌される上側内周溝51bと、その上型内周溝51bと同軸で大径の正面視円環状の溝として凹設され外筒部材20の小径筒部21の軸方向端部(図3上側)が内嵌される上型外周溝51cとを備える。   The upper die 51 is a part for forming the outer shape of the first molded body FB on one side in the axial direction (the lower side in FIG. 3), and an upper die pin 51a inserted into the inner periphery of the inner cylinder member 10, and its An upper inner circumferential groove 51b that is recessed as an annular groove when viewed from the front around the upper mold pin 51a and into which an axial end (upper side in FIG. 3) of the inner cylinder member 10 is fitted, and its upper inner circumferential groove 51b And an upper mold outer peripheral groove 51c that is recessed as a large-diameter front-view annular groove that is coaxial with the inner end of the outer cylinder member 20 and in which the axial end (upper side in FIG. 3) of the small-diameter cylinder portion 21 is fitted.

なお、下型52は、下型ピン52aと、下型内周溝52bと、下型外周溝52cとを備える。これら下型ピン52a、下型内周溝52b及び下型外周溝52cは、上型ピン51a、上側内周溝51b及び上型外周溝51cと同一の構成であるので、その説明を省略する。   The lower mold 52 includes a lower mold pin 52a, a lower mold inner circumferential groove 52b, and a lower mold outer circumferential groove 52c. Since the lower mold pin 52a, the lower mold inner circumferential groove 52b, and the lower mold outer circumferential groove 52c have the same configuration as the upper mold pin 51a, the upper inner circumferential groove 51b, and the upper mold outer circumferential groove 51c, description thereof is omitted.

加硫金型50が型締めされた状態では、内筒部材10の軸方向端部(図3上側および下側)における外周面が上型内周溝51b及び下型内周溝52bによりシールされると共に、外筒部材20の小径筒部21における軸方向端面(図3上側面および下側面)及び内周面が上型外周溝51c及び下型外周溝52cによりシールされる。その結果、密閉された空間であるキャビティが内筒部材10と外筒部材20との間に形成される。   In a state where the vulcanizing mold 50 is clamped, the outer peripheral surface at the axial end (the upper side and the lower side in FIG. 3) of the inner cylinder member 10 is sealed by the upper mold inner circumferential groove 51b and the lower mold inner circumferential groove 52b. In addition, the axial end surfaces (upper side surface and lower side surface in FIG. 3) and the inner peripheral surface of the small-diameter cylindrical portion 21 of the outer cylindrical member 20 are sealed by the upper mold outer peripheral groove 51c and the lower mold outer peripheral groove 52c. As a result, a cavity which is a sealed space is formed between the inner cylinder member 10 and the outer cylinder member 20.

即ち、加硫工程では、まず、加硫金型50の下型52に内筒部材10及び外筒部材20(絞り加工が施される前のもの)を設置し、次いで、上型51を下降移動させて、型締めする。これにより、図3に示すように、防振基体30(図2参照)を加硫成形するための空間であるキャビティが形成されるので、図示しない注入孔からキャビティ内にゴム状弾性体を注入して充填する。そして、加硫金型50を加圧・加熱した状態で所定時間保持することで、ゴム状弾性体が加硫され、第1成形体FB(防振基体30)が成形される。   That is, in the vulcanization process, first, the inner cylinder member 10 and the outer cylinder member 20 (before drawing) are installed in the lower mold 52 of the vulcanization mold 50, and then the upper mold 51 is lowered. Move and clamp. As a result, as shown in FIG. 3, a cavity, which is a space for vulcanization molding of the vibration isolating substrate 30 (see FIG. 2), is formed, and a rubber-like elastic body is injected into the cavity from an injection hole (not shown). Then fill. Then, the rubber-like elastic body is vulcanized by holding the vulcanization mold 50 in a pressurized and heated state for a predetermined time, and the first molded body FB (vibration-proof base 30) is molded.

第1成形体FBを成形した後は、第1成形体FBに対し、絞り金型SMを用いた絞り加工を施し、外筒部材20の大径筒部22を縮径させる絞り工程を行う。ここで、図4を参照して、絞り工程について説明する。   After forming the first molded body FB, the first molded body FB is subjected to a drawing process using the drawing die SM to reduce the diameter of the large-diameter cylindrical portion 22 of the outer cylinder member 20. Here, the drawing process will be described with reference to FIG.

図4は、絞り金型SM及び第1成形体FBの断面図である。なお、図4では、第1成形体FBの軸方向長さの中央位置において絞り金型SMを断面視している。但し、第1成形体FBについては断面視せずに図示する。   FIG. 4 is a cross-sectional view of the drawing die SM and the first molded body FB. In FIG. 4, the drawing die SM is viewed in cross section at the center position of the axial length of the first molded body FB. However, the first molded body FB is shown without a cross-sectional view.

図4に示すように、絞り工程は、加硫工程により成形された第1成形体FBにおける外筒部材20の大径筒部22に縮径方向への絞り加工を施す工程であり、中央部から放射状に分割された複数(本実施の形態では周方向等間隔に配置される12個)の分割片Mdvを持つ絞り金型SMを用いて行われる。   As shown in FIG. 4, the drawing step is a step of drawing the large-diameter cylindrical portion 22 of the outer cylindrical member 20 in the first molded body FB formed by the vulcanization step in the reduced diameter direction. Is performed using a drawing die SM having a plurality of divided pieces Mdv (12 pieces arranged at equal intervals in the circumferential direction) that are radially divided from each other.

絞り金型SMは、下型および上型の間に複数の分割片Mdvが移動可能に装着され、下型および上型がプレス装置の圧力により上下方向に駆動されると、その駆動力を利用して、各分割片Mdvが径方向内方(第1成形体FB側)へ向けて変位されるように構成される。   The drawing die SM has a plurality of divided pieces Mdv movably mounted between the lower die and the upper die, and uses the driving force when the lower die and the upper die are driven in the vertical direction by the pressure of the press device. And each division | segmentation piece Mdv is comprised so that it may be displaced toward radial inside (1st molded object FB side).

分割片Mdvは、外筒部材20の大径筒部22の外周面に当接する内周面を備えると共に、その分割片Mdvの内周面は、図4に示す軸方向視において、外筒部材20の大径筒部22の外周面に対応する円弧状に湾曲して形成される。   The divided piece Mdv includes an inner peripheral surface that comes into contact with the outer peripheral surface of the large-diameter cylindrical portion 22 of the outer cylindrical member 20, and the inner peripheral surface of the divided piece Mdv is an outer cylindrical member in the axial direction shown in FIG. It is formed to be curved in an arc shape corresponding to the outer peripheral surface of the 20 large-diameter cylindrical portions 22.

なお、各分割片Mdvの内周面は、円筒の内周面形状に形成され、それぞれ同軸となる位置に配置される。即ち、各分割片Mdvの内周面を連ねると円筒の内周面形状が形成されると共に、その内周面形状の内径寸法は、軸方向(図4紙面垂直方向)に沿って一定とされる。また、各分割片Mdvの内周面の軸方向長さは、外筒部材20の大径筒部22の軸方向長さよりも大きくされる。   In addition, the inner peripheral surface of each division | segmentation piece Mdv is formed in the cylindrical inner peripheral surface shape, and is each arrange | positioned in the position which becomes coaxial. That is, when the inner peripheral surface of each divided piece Mdv is connected, a cylindrical inner peripheral surface shape is formed, and the inner diameter of the inner peripheral surface shape is constant along the axial direction (perpendicular to the paper surface of FIG. 4). The Further, the axial length of the inner peripheral surface of each divided piece Mdv is made larger than the axial length of the large-diameter cylindrical portion 22 of the outer cylindrical member 20.

このように構成された絞り金型SMが駆動され、各分割片Mdvが径方向内方へ向けて変位されると、各分割片Mdvの内周面が外筒部材20の大径筒部22の外周面のみに当接されると共に、各分割片Mdvの内周面により外筒部材20の大径筒部22の外周面のみが径方向内方へ向けて押圧される。即ち、各分割片Mdvの内周面は、外筒部材20の小径筒部21及び傾斜筒部23の外周面には当接されない。   When the diaphragm mold SM configured as described above is driven and each divided piece Mdv is displaced radially inward, the inner peripheral surface of each divided piece Mdv is the large diameter cylindrical portion 22 of the outer cylindrical member 20. Only the outer peripheral surface of the large-diameter cylindrical portion 22 of the outer cylindrical member 20 is pressed radially inward by the inner peripheral surface of each divided piece Mdv. That is, the inner peripheral surface of each divided piece Mdv is not in contact with the outer peripheral surfaces of the small-diameter cylindrical portion 21 and the inclined cylindrical portion 23 of the outer cylindrical member 20.

絞り行程では、絞り金型SMの中央部(各分割片Mdvの内周面に取り囲まれた空間内)へ第1成形体FBを設置し、型締めした後、プレス装置により上下方向に押圧して、各分割片Mdvを径方向内方へ向けて移動させる。これにより、外筒部材20の大径筒部22の外周面が各分割片Mdvの内周面により径方向内方へ押圧され、かかる径方向内方への押圧により、大径筒部22全体が径方向へ均等に縮径される。その結果、防振装置1(図2参照)の製造が完了する。   In the drawing process, the first molded body FB is placed in the central portion of the drawing die SM (in the space surrounded by the inner peripheral surface of each divided piece Mdv), clamped, and then pressed up and down by a pressing device. Then, each divided piece Mdv is moved inward in the radial direction. Thereby, the outer peripheral surface of the large-diameter cylindrical portion 22 of the outer cylindrical member 20 is pressed radially inward by the inner peripheral surface of each divided piece Mdv, and the large-diameter cylindrical portion 22 as a whole is pressed by the radially inward pressing. Are uniformly reduced in the radial direction. As a result, the manufacture of the vibration isolator 1 (see FIG. 2) is completed.

なお、外筒部材20の大径筒部22には、比較的大きな絞り率(本実施の形態では略6%)が付与される。絞り率は、大径筒部22の内周面における内径寸法を基準とし、「絞り率=(絞り加工前の内径寸法−絞り加工後の内径寸法)×100/(絞り加工前の内径寸法)」により算出される。   Note that a relatively large aperture ratio (approximately 6% in the present embodiment) is applied to the large-diameter cylindrical portion 22 of the outer cylindrical member 20. The drawing ratio is based on the inner diameter of the inner peripheral surface of the large-diameter cylindrical portion 22, and “drawing ratio = (inner diameter before drawing−inner diameter after drawing) × 100 / (inner diameter before drawing)”. ] Is calculated.

このように、第1成形体FBには、絞り金型SMを用いた絞り加工が、外筒部材20の大径筒部22のみに施される(即ち、外筒部材20の傾斜筒部23及び小径筒部21は絞り金型SMの各分割片Mdvによって径方向内方へ向けて押圧されない)ので、防振基体30の耐久性の向上を図りつつ、外筒部材20の軸方向端部(小径筒部21)における接着界面の破壊を抑制することができる。   As described above, the first molded body FB is subjected to drawing processing using the drawing die SM only on the large-diameter cylindrical portion 22 of the outer cylindrical member 20 (that is, the inclined cylindrical portion 23 of the outer cylindrical member 20). And the small-diameter cylindrical portion 21 is not pressed radially inward by the divided pieces Mdv of the aperture die SM), so that the end portion of the outer cylindrical member 20 in the axial direction is improved while improving the durability of the vibration-isolating base 30 Breakage of the adhesion interface in the (small diameter cylinder portion 21) can be suppressed.

即ち、外筒部材20の大径筒部22に比較的大きな絞り率の絞り加工が施されることで、外筒部材20の大径筒部22の内周面に加硫接着されている防振基体部分(大径部材22と内筒部材10との対向間に位置する防振基体30の円環状の部分、図2参照)の加硫成形後の収縮を取り除くと共に予備圧縮を付与して、その耐久性の向上を図りつつ、外筒部材20の小径筒部21のひずみは低減して、その小径筒部21の内周面に加硫接着されている防振基体部分(小径筒部21の内周側に加硫接着され軸方向に沿って一定の厚みを有する膜状に形成される防振基体30の部分、図2参照)の接着界面の破壊を抑制することができる。   That is, the large-diameter cylindrical portion 22 of the outer cylinder member 20 is subjected to a drawing process with a relatively large squeezing ratio, so that the inner peripheral surface of the large-diameter cylindrical portion 22 of the outer cylindrical member 20 is vulcanized and bonded. The shrinkage after the vulcanization molding of the vibration base portion (the annular portion of the vibration isolation base 30 located between the large-diameter member 22 and the inner cylinder member 10, see FIG. 2) is removed and pre-compression is applied. While improving the durability, the distortion of the small-diameter cylindrical portion 21 of the outer cylindrical member 20 is reduced, and the vibration-proof base portion (small-diameter cylindrical portion) bonded to the inner peripheral surface of the small-diameter cylindrical portion 21 by vulcanization. It is possible to suppress the breakage of the adhesion interface of the anti-vibration base 30 that is vulcanized and bonded to the inner peripheral side of the film 21 and formed in a film shape having a certain thickness along the axial direction (see FIG. 2).

一方で、大径筒部22に比較的大きな絞り率(本実施の形態では略6%)の絞り加工が施されると、その大径筒部22の塑性変形が、傾斜筒部23によって緩衝されつつ、小径筒部21にも伝達され、小径筒部21も比較的小さな絞り率で縮径される。これにより、外筒部材20の小径筒部21の内周面に加硫接着されている防振基体部分(上述した一定の厚みを有する膜状に形成される部分)の加硫成形後の収縮を緩和して、その耐久性の向上も図ることができる。   On the other hand, when the large diameter cylindrical portion 22 is subjected to a drawing process having a relatively large drawing ratio (approximately 6% in the present embodiment), the plastic deformation of the large diameter cylindrical portion 22 is buffered by the inclined cylindrical portion 23. While being transmitted to the small diameter cylindrical portion 21, the small diameter cylindrical portion 21 is also reduced in diameter with a relatively small aperture ratio. Thereby, the shrinkage | contraction after vulcanization molding of the anti-vibration base | substrate part (part formed in the film form which has the fixed thickness mentioned above) vulcanized-bonded to the internal peripheral surface of the small diameter cylinder part 21 of the outer cylinder member 20 Can be relaxed and the durability can be improved.

ここで、外筒部材20の大径筒部22に付与する絞り率は、2%以上かつ10%以下とすることが好ましい。10%以上の絞り率を付与した場合には、大径筒部22における化成皮膜が破壊される一方、2%以下の絞り率の付与では、防振基体30の加硫成形後の収縮を十分に取り除くことできないからである。   Here, the drawing ratio applied to the large-diameter cylindrical portion 22 of the outer cylindrical member 20 is preferably 2% or more and 10% or less. When a drawing ratio of 10% or more is applied, the chemical conversion film in the large-diameter cylindrical portion 22 is destroyed, whereas when a drawing ratio of 2% or less is applied, the vibration-proof substrate 30 is sufficiently contracted after vulcanization molding. It is because it cannot be removed.

なお、絞り率の下限は、3%としても良く、より好ましくは、4%としても良い。一方、絞り率の上限は、9%としても良く、より好ましくは、8%としても良い。収縮を取り除く効果と化成皮膜の破壊を防止する効果とをより確実に両立することができるからである。   Note that the lower limit of the aperture ratio may be 3%, and more preferably 4%. On the other hand, the upper limit of the aperture ratio may be 9%, and more preferably 8%. This is because the effect of removing shrinkage and the effect of preventing destruction of the chemical conversion film can be more reliably achieved.

次いで、図5及び図6を参照して、第2実施の形態における防振装置201について説明する。第1実施の形態では、外筒部材20の小径筒部21における内周面側のみに防振基体30が加硫接着される場合を説明したが、第2実施の形態では、外筒部材220の小径筒部221における軸方向端面および外周面まで防振基体230の一部(膜部232)が連なる。なお、第1実施の形態と同一の部分については同一の符号を付して、その説明を省略する。   Next, with reference to FIG. 5 and FIG. 6, the vibration isolator 201 in the second embodiment will be described. In the first embodiment, the case where the vibration-proof base 30 is vulcanized and bonded only to the inner peripheral surface side of the small-diameter cylinder portion 21 of the outer cylinder member 20 has been described. However, in the second embodiment, the outer cylinder member 220 is used. Part of the vibration isolation base 230 (film portion 232) continues to the axial end surface and the outer peripheral surface of the small-diameter cylindrical portion 221. In addition, the same code | symbol is attached | subjected about the part same as 1st Embodiment, and the description is abbreviate | omitted.

図5(a)は、第2実施の形態における防振装置201の上面図であり、図5(b)は、図5(a)のVb−Vb線における防振装置201の断面図である。また、図6は、図5(b)の一部を部分的に拡大した防振装置201の部分拡大断面図である。なお、図5及び図6では、外筒部材220の大径筒部22に絞り加工が施された後の状態(即ち、完成状態における防振装置1)が図示される。   FIG. 5A is a top view of the vibration isolator 201 in the second embodiment, and FIG. 5B is a cross-sectional view of the vibration isolator 201 taken along the line Vb-Vb in FIG. . FIG. 6 is a partially enlarged cross-sectional view of the vibration isolator 201 in which a part of FIG. 5B is partially enlarged. 5 and 6 show a state after the large diameter cylindrical portion 22 of the outer cylindrical member 220 has been subjected to drawing processing (that is, the vibration isolator 1 in the completed state).

図5及び図6に示すように、防振装置201は、第1実施の形態の場合と同様に、鉄鋼材料から軸Oを有する筒状に形成される外筒部材220が、内筒部材10と同軸状に配置され、それら内筒部材10及び外筒部材220の間が、ゴム状弾性体から形成される防振基体230により連結される。   As shown in FIGS. 5 and 6, as in the case of the first embodiment, the vibration isolating device 201 includes an outer cylinder member 220 formed in a cylindrical shape having a shaft O from a steel material. The inner cylinder member 10 and the outer cylinder member 220 are connected by a vibration-isolating base 230 formed of a rubber-like elastic body.

外筒部材220は、第1実施の形態の場合と同様に、小径筒部221、大径筒部22及び傾斜筒部223を備える。なお、第2実施の形態における外筒部材220は、第1実施の形態における外筒部材20に切削加工を施して一部を切除することで形成される。ここで、図7を参照して、外筒部材220に施される切削加工について説明する。   The outer cylinder member 220 includes a small-diameter cylinder part 221, a large-diameter cylinder part 22, and an inclined cylinder part 223, as in the case of the first embodiment. The outer cylinder member 220 in the second embodiment is formed by cutting the outer cylinder member 20 in the first embodiment and cutting a part thereof. Here, with reference to FIG. 7, the cutting process performed to the outer cylinder member 220 is demonstrated.

図7(a)は、切削加工が施される前の状態における外筒部材220の断面図であり、図7(b)は、切削加工が施された後の状態における外筒部材220の断面図である。なお、図7(a)には切削加工により切除される領域が、図7(b)には切削加工が施される前の状態における外筒部材220の外形形状が、それぞれ2点差鎖線を用いて図示される。   FIG. 7A is a cross-sectional view of the outer cylinder member 220 in a state before being subjected to cutting, and FIG. 7B is a cross-section of the outer cylinder member 220 in a state after being subjected to cutting. FIG. In FIG. 7A, a region cut out by cutting is used, and in FIG. 7B, the outer shape of the outer cylindrical member 220 in a state before being cut is used by a two-dot chain line. Is illustrated.

図7(a)に示すように、外筒部材220は、小径筒部221、大径筒部22及び傾斜筒部223を備える。なお、切削加工が施される前の状態においては、これら各筒部221,22,223は、第1実施の形態における外筒部材20の各筒部21〜23とそれぞれ同一の形状であるので、その説明を省略する。   As shown in FIG. 7A, the outer cylinder member 220 includes a small diameter cylinder part 221, a large diameter cylinder part 22, and an inclined cylinder part 223. In addition, in the state before cutting is performed, each of these cylindrical portions 221, 22 and 223 has the same shape as each of the cylindrical portions 21 to 23 of the outer cylindrical member 20 in the first embodiment. The description is omitted.

外筒部材220には、加硫工程を行う前に、小径筒部221及び傾斜筒部223の外周面側(図7(a)に2点鎖線で示す領域)を軸O(図5参照)周りに全周にわたって切除する切削加工が施される。なお、この切削加工は、外筒部材220の軸方向両端の同一の領域にそれぞれ施される。   Before the vulcanization process is performed on the outer cylinder member 220, the outer peripheral surface side of the small-diameter cylinder part 221 and the inclined cylinder part 223 (the region indicated by the two-dot chain line in FIG. 7A) is the axis O (see FIG. 5). Cutting is performed around the entire circumference. This cutting process is performed on the same region on both ends of the outer cylinder member 220 in the axial direction.

図7(b)に示すように、外筒部材220には、切削加工が施されることで、外周切除面221aと平坦切除面223aとが全周にわたって連続して形成される。外周切除面221aは、小径筒部221の外周側および傾斜筒部223の一部の外周側に位置し、軸O(図5参照)に平行な円筒面として形成される。平坦切除面223aは、外周切除面221aに連なると共に軸Oに垂直な平坦面として形成される。よって、平坦切除面223aは、軸方向視円環形状に形成される。   As shown in FIG. 7B, the outer cylinder member 220 is cut to form an outer peripheral cut surface 221a and a flat cut surface 223a continuously over the entire circumference. The outer peripheral cut surface 221a is located on the outer peripheral side of the small diameter cylindrical portion 221 and a part of the outer peripheral side of the inclined cylindrical portion 223, and is formed as a cylindrical surface parallel to the axis O (see FIG. 5). The flat cut surface 223a is formed as a flat surface continuous with the outer peripheral cut surface 221a and perpendicular to the axis O. Therefore, the flat cut surface 223a is formed in an annular shape when viewed in the axial direction.

図5及び図6に戻って説明する。第2実施の形態における防振基体230は、膜部232を備える点を除き、他の構成は、第1実施の形態における防振基体30と同一であるので、その説明を省略する。   Returning to FIG. 5 and FIG. The anti-vibration base 230 in the second embodiment is the same as the anti-vibration base 30 in the first embodiment except that the film portion 232 is provided, and thus the description thereof is omitted.

膜部232は、ゴム状弾性体から防振基体230の一部として構成される。即ち、膜部232は、外筒部材220の小径筒部221の内周面に加硫接着されている防振基体部分(小径筒部221の内周側に加硫接着され軸方向に沿って一定の厚みを有する膜状に形成される防振基体230の部分)に一端側が連なると共に、その一端側から延設された途中部分が外筒部材220の小径筒部221における軸方向端面で折り返した後に小径筒部221の外周側を通過し、他端側が平坦切除面223aに連結される。   The film part 232 is configured as a part of the vibration isolation base 230 from a rubber-like elastic body. That is, the film part 232 is vulcanized and bonded to the inner peripheral side of the small-diameter cylindrical part 221 by being vulcanized and bonded to the inner peripheral surface of the small-diameter cylindrical part 221 of the outer cylindrical member 220 along the axial direction. One end of the anti-vibration base 230 formed in a film having a certain thickness is connected to one end side, and a midway portion extending from the one end side is folded back at the axial end surface of the small-diameter cylindrical portion 221 of the outer cylindrical member 220. After passing through the outer peripheral side of the small diameter cylindrical portion 221, the other end side is connected to the flat cut surface 223a.

なお、膜部232は、小径筒部221における内周面および軸方向端面と外周切除面221aと平坦切除面232aとにそれぞれ加硫接着される。また、膜部232の厚み寸法は延設方向に沿って一定の厚み寸法とされ、小径筒部221の内周面に加硫接着されている防振基体部分の厚み寸法(図6左右寸法)と同一とされる。   The film portion 232 is vulcanized and bonded to the inner peripheral surface and the axial end surface, the outer peripheral cut surface 221a, and the flat cut surface 232a of the small diameter cylindrical portion 221. Further, the thickness dimension of the film portion 232 is a constant thickness dimension along the extending direction, and the thickness dimension of the vibration-proof base portion vulcanized and bonded to the inner peripheral surface of the small-diameter cylindrical portion 221 (the left-right dimension in FIG. 6). Is the same.

次いで、図8及び図9を参照して、第2実施の形態における防振装置201の製造方法について説明する。防振装置201の製造は、第1実施の形態の場合と同様に、加硫工程により第1成形体FBを成形した後、絞り工程により第1成形体FBの外筒部材20に絞り加工を施すことで行われる。絞り工程については、第1実施の形態と同様であるので、その説明を省略する。   Next, with reference to FIGS. 8 and 9, a method for manufacturing the vibration isolator 201 in the second embodiment will be described. As in the case of the first embodiment, the vibration isolator 201 is manufactured by forming the first molded body FB by the vulcanization process and then drawing the outer cylinder member 20 of the first molded body FB by the drawing process. It is done by applying. Since the drawing process is the same as that of the first embodiment, the description thereof is omitted.

図8は、内筒部材10及び外筒部材220が設置されて型締めされた加硫金型250の断面図である。また、図9は、図8の一部を部分的に拡大した加硫金型250の部分拡大断面図である。   FIG. 8 is a cross-sectional view of the vulcanization mold 250 in which the inner cylinder member 10 and the outer cylinder member 220 are installed and clamped. FIG. 9 is a partially enlarged cross-sectional view of a vulcanization mold 250 in which a part of FIG. 8 is partially enlarged.

なお、図8及び図9では、キャビティ内にゴム状弾性体が注入される前の状態が図示されると共に、加硫金型250に形成される注入孔の図示が省略される。また、図8及び図9に示す内筒部材10及び外筒部材220の断面は、図5(b)に示す断面に対応する。但し、図8及び図9に示す外筒部材220は絞り加工が施される前の状態(即ち、図7(b)の状態)が図示される。   8 and 9, the state before the rubber-like elastic body is injected into the cavity is shown, and the injection hole formed in the vulcanizing mold 250 is not shown. Moreover, the cross section of the inner cylinder member 10 and the outer cylinder member 220 shown in FIG.8 and FIG.9 respond | corresponds to the cross section shown in FIG.5 (b). However, the outer cylinder member 220 shown in FIGS. 8 and 9 shows a state before the drawing process (that is, the state shown in FIG. 7B).

図8及び図9に示すように、第2実施の形態における加硫金型250は、上下に型締めされる上型251及び下型252を備える。上型251は、上型ピン51aと、上側内周溝51bと、その上型内周溝51bと同軸で大径の正面視円環状の溝として凹設され外筒部材220の小径筒部221の軸方向端部が配置される上型外周溝251cと、その上型外周溝251cの外周側に連なる正面視円環状の平坦面として形成され外筒部材220の平坦切除面232aに当接される上型段部251dとを備える。   As shown in FIGS. 8 and 9, the vulcanization mold 250 in the second embodiment includes an upper mold 251 and a lower mold 252 that are clamped up and down. The upper die 251 is recessed as a large-diameter front-view annular groove that is coaxial with the upper die inner circumferential groove 51b and the upper inner circumferential groove 51b, and has a small diameter cylindrical portion 221 of the outer cylindrical member 220. The upper die outer circumferential groove 251c in which the axial end portion of the upper die outer circumferential groove 251c is disposed, and a flat cut surface 232a of the outer cylinder member 220 which is formed as an annular flat surface continuous with the outer circumferential side of the upper die outer circumferential groove 251c. And an upper mold step 251d.

なお、下型252は、下型ピン52aと、下型内周溝52bと、下型外周溝252cと、下型段部252dとを備える。下型外周溝252c及び下型段部251dは、上型外周溝251c及び上型段部251dと同一の構成であり、また、各ピン51a,52a及び各内周溝51b,52bは、第1実施の形態の場合と同一の構成であるので、これらの説明を省略する。   The lower mold 252 includes a lower mold pin 52a, a lower mold inner circumferential groove 52b, a lower mold outer circumferential groove 252c, and a lower mold step 252d. The lower die outer groove 252c and the lower die step 251d have the same configuration as the upper die outer groove 251c and the upper die step 251d, and the pins 51a, 52a and the inner grooves 51b, 52b Since it is the same structure as the case of embodiment, these description is abbreviate | omitted.

上型外周溝251cは、防振基体230の膜部232(図5及び図6参照)の外形を形成するための部位であり、その上型外周溝251cの内壁は、小径筒部221の内周面および軸方向端面と外周切除面221aとから所定の間隔だけ離間した位置に配設される。上型段部251dは、軸方向(型締め方向、図8及び図9上下方向)に垂直な平坦面として形成される。   The upper die outer circumferential groove 251c is a portion for forming the outer shape of the film portion 232 (see FIGS. 5 and 6) of the vibration isolation base 230, and the inner wall of the upper die outer circumferential groove 251c is the inner diameter of the small diameter cylindrical portion 221. It is arranged at a position spaced apart from the peripheral surface and the axial end surface and the peripheral cut surface 221a by a predetermined distance. The upper mold step 251d is formed as a flat surface perpendicular to the axial direction (the mold clamping direction, the vertical direction in FIGS. 8 and 9).

加硫金型250が型締めされた状態では、内筒部材10の軸方向端部(図8上側および下側)における外周面が上型内周溝51b及び下型内周溝52bによりシールされると共に、外筒部材220の平坦切除面232aが上型段部251d及び下型段部252dによりシールされる。その結果、密閉された空間であるキャビティが内筒部材10と外筒部材20との間および外筒部材20の軸方向端部に形成される。   In a state where the vulcanization mold 250 is clamped, the outer peripheral surface at the axial end (the upper side and the lower side in FIG. 8) of the inner cylinder member 10 is sealed by the upper mold inner circumferential groove 51b and the lower mold inner circumferential groove 52b. At the same time, the flat cut surface 232a of the outer cylinder member 220 is sealed by the upper mold step 251d and the lower mold step 252d. As a result, a cavity, which is a sealed space, is formed between the inner cylinder member 10 and the outer cylinder member 20 and at the axial end of the outer cylinder member 20.

即ち、加硫工程では、まず、加硫金型250の下型252に内筒部材10及び外筒部材220(絞り加工が施される前のもの)を設置し、次いで、上型251を下降移動させて、型締めする。これにより、図8及び図9に示すように、防振基体230(図5参照)を加硫成形するための空間であるキャビティが形成されるので、第1実施の形態の場合と同様に、第1成形体FB(防振基体)を加硫成形する。   That is, in the vulcanization process, first, the inner cylinder member 10 and the outer cylinder member 220 (before drawing) are installed in the lower mold 252 of the vulcanization mold 250, and then the upper mold 251 is lowered. Move and clamp. As a result, as shown in FIG. 8 and FIG. 9, a cavity, which is a space for vulcanization molding of the vibration isolation base 230 (see FIG. 5), is formed. As in the case of the first embodiment, The first molded body FB (antivibration base) is vulcanized.

ここで、第2実施の形態では、外筒部材220の傾斜筒部223に平坦切除面223aを設け、防振基体230を加硫金型251により加硫成形する際には、平坦切除面223aを各段部251c,252cに当接させるシール面として利用するので、加硫成形時のシール性の向上を図ることができる。   Here, in the second embodiment, the flat cut surface 223a is provided on the inclined cylindrical portion 223 of the outer cylinder member 220, and when the anti-vibration base 230 is vulcanized by the vulcanization mold 251, the flat cut surface 223a. Is used as a sealing surface to be brought into contact with the respective step portions 251c and 252c, so that the sealing performance at the time of vulcanization molding can be improved.

これにより、膜部232を外筒部材220の外周面側(即ち、外周切除面221a側)まで延設させた場合でも、各段部251c,252cによる平坦切除面223aのシールにより、外筒部材220の大径筒部22の外周面へのゴム載り(ゴムバリの付着)を抑制できるので、外筒部材22をサスペンションアームSA(図1参照)へ圧入する際の圧入荷重の増加および圧入後の抜け荷重の減少を抑制することができる。   Thus, even when the film portion 232 is extended to the outer peripheral surface side (that is, the outer peripheral cut surface 221a side) of the outer cylindrical member 220, the outer cylindrical member is sealed by the flat cut surface 223a by the step portions 251c and 252c. Since it is possible to suppress the rubber from being put on the outer peripheral surface of the large-diameter cylindrical portion 22 (adhesion of rubber burrs), an increase in the press-fit load when the outer tubular member 22 is press-fitted into the suspension arm SA (see FIG. 1) and It is possible to suppress a decrease in the unloading load.

加硫工程において第1成形体FBを成形した後は、その第1成形体FBに対し、絞り金型SMを用いた絞り加工を施し、外筒部材220の大径筒部22を縮径させることで、防振装置201(図5参照)の製造が完了する。   After the first molded body FB is molded in the vulcanization process, the first molded body FB is subjected to a drawing process using the drawing die SM to reduce the diameter of the large-diameter cylindrical portion 22 of the outer cylindrical member 220. This completes the manufacture of the vibration isolator 201 (see FIG. 5).

以上のように、第2実施の形態では、防振基体230が膜部232を備え、その膜部232は、小径筒部221の内周面に加硫接着された防振基体部分から、小径筒部221の軸方向端面を越え、小径筒部221の外周面(即ち、外周切除面221a)まで延設されるので、内筒部材10(図5参照)が外筒部材220に対して軸方向へ相対的に大変位した場合でも、膜部232の端部に引張力が作用し難くすることができる。その結果、膜部232の端部と小径筒部221との間の接着剥離を抑制して、耐久性の向上を図ることができる。   As described above, in the second embodiment, the vibration isolation base 230 includes the film portion 232, and the film portion 232 has a small diameter from the vibration isolation base portion vulcanized and bonded to the inner peripheral surface of the small diameter cylindrical portion 221. Since it extends beyond the end surface in the axial direction of the cylindrical portion 221 and extends to the outer peripheral surface of the small-diameter cylindrical portion 221 (that is, the outer peripheral cut surface 221a), the inner cylindrical member 10 (see FIG. 5) is pivoted with respect to the outer cylindrical member 220. Even when the displacement is relatively large in the direction, it is possible to make it difficult for the tensile force to act on the end of the film portion 232. As a result, it is possible to suppress the adhesion peeling between the end portion of the film portion 232 and the small diameter cylindrical portion 221 and improve the durability.

また、防振基体230に連なる膜部232が小径筒部221の軸方向端面を越えて外周面(外周切除面221a)まで延設されることで、その分、接着面積を拡大することができる。よって、仮に膜部232の端部(平坦切除面223a側の端部)から接着剥離が発生した場合でも、接着面積が拡大されている分、接着剥離が防振基体230まで到達することを抑制して、耐久性の向上を図ることができる。   Further, the film portion 232 connected to the vibration isolation base 230 extends beyond the end surface in the axial direction of the small-diameter cylindrical portion 221 to the outer peripheral surface (outer peripheral cut surface 221a), so that the bonding area can be increased accordingly. . Therefore, even if adhesive peeling occurs from the end of the film part 232 (the end on the flat cut surface 223a side), the adhesive peeling is prevented from reaching the anti-vibration substrate 230 because the adhesive area is enlarged. Thus, durability can be improved.

更に、本実施の形態では、膜部232が、小径筒部221の軸方向端面を越えて外周面(外周切除面221a)まで延設される構成において、その膜部232の端部が平坦切除面223aに加硫接着される。即ち、膜部232は、小径筒部221の内周面および軸方向端面と外周切除面221aとにそれぞれ加硫接着されるだけでなく、端部が平坦切除面223aにも加硫接着される。よって、その分、接着面積をさらに拡大させることができるので、接着剥離が防振基体230まで到達することの抑制効果を高め、耐久性の一層の向上を図ることができる。   Furthermore, in the present embodiment, in the configuration in which the film part 232 extends beyond the end surface in the axial direction of the small diameter cylindrical part 221 to the outer peripheral surface (outer peripheral cut surface 221a), the end of the film part 232 is flat cut. Vulcanized and bonded to the surface 223a. That is, the film portion 232 is not only vulcanized and bonded to the inner peripheral surface and the axial end surface of the small diameter cylindrical portion 221 and the outer peripheral cut surface 221a, but also the end portion is also vulcanized and bonded to the flat cut surface 223a. . Therefore, since the adhesion area can be further increased by that amount, the effect of suppressing the adhesion peeling from reaching the vibration proof substrate 230 can be enhanced, and the durability can be further improved.

次いで、図10を参照して、第3実施の形態から第5実施の形態における防振装置301〜501について説明する。第1実施の形態では、外筒部材20の小径筒部21における内周面側のみに防振基体30が加硫接着される場合を説明したが、第3実施の形態から第5実施の形態では、防振基体330〜530の一部(膜部332〜532)が外筒部材20の小径筒部21における軸方向端面まで少なくとも延設される。なお、第1実施の形態と同一の部分については同一の符号を付して、その説明を省略する。   Next, with reference to FIG. 10, vibration isolators 301 to 501 in the third to fifth embodiments will be described. In the first embodiment, the case where the vibration-proof base 30 is vulcanized and bonded only to the inner peripheral surface side of the small-diameter cylinder portion 21 of the outer cylinder member 20 has been described. However, the third to fifth embodiments are described. Then, a part (film portions 332 to 532) of the vibration isolation bases 330 to 530 extends at least to the axial end surface of the small diameter cylindrical portion 21 of the outer cylindrical member 20. In addition, the same code | symbol is attached | subjected about the part same as 1st Embodiment, and the description is abbreviate | omitted.

なお、第3実施の形態から第5実施の形態における防振装置301〜501は、膜部332〜532を備える点を除き、その他の構成は、第1実施の形態における防振装置1と同一であるので、その説明を省略する。   In addition, the vibration isolator 301-501 in 3rd Embodiment to 5th Embodiment is the same as the vibration isolator 1 in 1st Embodiment except the point provided with the film parts 332-532. Therefore, the description thereof is omitted.

図10(a)から図10(c)は、第3実施の形態から第5実施の形態における防振装置301〜501の部分拡大断面図であり、それぞれ図2(b)に対応する。膜部332〜532は、ゴム状弾性体から防振基体330〜530の一部として構成される。   FIG. 10A to FIG. 10C are partially enlarged cross-sectional views of the vibration isolation devices 301 to 501 in the third to fifth embodiments, and correspond to FIG. 2B, respectively. The film parts 332 to 532 are configured as a part of the vibration isolation bases 330 to 530 from a rubber-like elastic body.

図10(a)に示すように、第3実施の形態における膜部332は、外筒部材20の小径筒部21の内周面に加硫接着されている防振基体部分(小径筒部21の内周側に加硫接着され軸方向に沿って一定の厚みを有する膜状に形成される防振基体330の部分)に一端側が連なると共に、その一端側から小径筒部21の軸方向端面まで延設される。なお、膜部332は、小径筒部21の内周面および軸方向端面に加硫接着される。   As shown in FIG. 10A, the film portion 332 in the third embodiment is a vibration-isolating base portion (small-diameter cylindrical portion 21) that is vulcanized and bonded to the inner peripheral surface of the small-diameter cylindrical portion 21 of the outer cylindrical member 20. One end side is connected to the vibration isolating base 330 that is vulcanized and bonded to the inner peripheral side of the film and formed in a film shape having a constant thickness along the axial direction, and the axial end surface of the small-diameter cylindrical portion 21 from the one end side. It is extended to. The film portion 332 is vulcanized and bonded to the inner peripheral surface and the axial end surface of the small diameter cylindrical portion 21.

図10(b)に示すように、第4実施の形態における膜部432は、第3実施の形態における膜部332に対し、その延設長さが、小径筒部21における軸方向端面と外周面との稜線部分まで延長され、小径筒部21の軸方向端面の全域を覆う。なお、膜部432は、小径筒部21の内周面および軸方向端面に加硫接着される。   As shown in FIG. 10 (b), the film portion 432 in the fourth embodiment has an extension length that is longer than the film portion 332 in the third embodiment, in the axial end surface and the outer periphery of the small-diameter cylindrical portion 21. It extends to the ridge line portion with the surface, and covers the entire area of the end surface in the axial direction of the small diameter cylindrical portion 21. The film portion 432 is vulcanized and bonded to the inner peripheral surface and the axial end surface of the small diameter cylindrical portion 21.

図10(c)に示すように、第5実施の形態における膜部532は、第4実施の形態における膜部432に対し、小径筒部21における軸方向端面と外周面との稜線部分で折り返し、小径筒部21の外周側を通過し、他端側が傾斜筒部23の外周面に連結される位置まで延設される。なお、膜部532は、小径筒部21の内周面、軸方向端面及び外周面と傾斜筒部23の外周面とに加硫接着される。   As shown in FIG. 10C, the film portion 532 in the fifth embodiment is folded back at the ridge line portion between the axial end surface and the outer peripheral surface of the small diameter cylindrical portion 21 with respect to the film portion 432 in the fourth embodiment. The other end side is extended to a position where it passes through the outer peripheral side of the small diameter cylindrical portion 21 and the other end side is connected to the outer peripheral surface of the inclined cylindrical portion 23. The film portion 532 is vulcanized and bonded to the inner peripheral surface, the axial end surface and the outer peripheral surface of the small diameter cylindrical portion 21 and the outer peripheral surface of the inclined cylindrical portion 23.

ここで、膜部332〜532の厚み寸法は延設方向に沿って一定の厚み寸法とされ、小径筒部21の内周面に加硫接着されている防振基体部分の厚み寸法(図10(a)上下寸法)とそれぞれ同一とされる。   Here, the thickness dimension of the film parts 332 to 532 is a constant thickness dimension along the extending direction, and the thickness dimension of the anti-vibration base part that is vulcanized and bonded to the inner peripheral surface of the small-diameter cylindrical part 21 (FIG. 10). (A) Vertical dimension) is the same.

これら第3実施の形態から第5実施の形態における防振装置301〜501を加硫成形する場合、第3実施の形態における防振装置301では外筒部材20の小径筒部21の軸方向端面(又は、小径筒部21の軸方向端面および外周面)を、第4実施の形態における防振装置401では、外筒部材20の小径筒部21の外周面(又は、小径筒部21の外周面および大径筒部22の外周面)を、第5実施の形態における防振装置501では、外筒部材20の傾斜筒部23の外周面(又は、傾斜筒部23の外周面および大径筒部22の外周面)を、それぞれ加硫金型の内壁面でシールする。   When these vibration isolators 301 to 501 in the third to fifth embodiments are vulcanized, in the vibration isolator 301 in the third embodiment, the axial end face of the small-diameter cylindrical portion 21 of the outer cylinder member 20. In the vibration isolator 401 according to the fourth embodiment, the outer peripheral surface of the small-diameter cylindrical portion 21 of the outer cylindrical member 20 (or the outer periphery of the small-diameter cylindrical portion 21) is used. In the vibration isolator 501 in the fifth embodiment, the outer peripheral surface of the inclined cylindrical portion 23 of the outer cylindrical member 20 (or the outer peripheral surface and the large diameter of the inclined cylindrical portion 23) is used. The outer peripheral surface of the cylindrical portion 22 is sealed with the inner wall surface of the vulcanization mold.

このように、第3実施の形態から第5実施の形態における防振措置301〜501では、外筒部材20の小径筒部21の内周面に加硫接着された防振基体部分に連なり少なくとも小径筒部21の軸方向端面まで延設される膜部332〜532を設けたので、内筒部材10(図2参照)が外筒部材20に対して軸方向(図10左右方向)へ相対的に大変位した場合でも、膜部332〜532の端部(防振基体部分に連なる部分と反対側の端部)に引張力が作用することを抑制することができる。その結果、膜部332〜532の端部と小径筒部21又は傾斜筒部23との間の接着剥離を抑制して、耐久性の向上を図ることができる。   As described above, in the vibration proof measures 301 to 501 in the third to fifth embodiments, at least the vibration proof base portion vulcanized and bonded to the inner peripheral surface of the small diameter cylindrical portion 21 of the outer cylinder member 20 is connected. Since the film portions 332 to 532 extending to the axial end face of the small diameter cylindrical portion 21 are provided, the inner cylindrical member 10 (see FIG. 2) is relative to the outer cylindrical member 20 in the axial direction (left and right direction in FIG. 10). Even when the displacement is greatly large, it is possible to prevent the tensile force from acting on the end portions of the film portions 332 to 532 (the end portion on the opposite side to the portion connected to the vibration isolation base portion). As a result, it is possible to suppress the adhesion peeling between the end portions of the film portions 332 to 532 and the small-diameter cylindrical portion 21 or the inclined cylindrical portion 23 and improve durability.

また、このように、防振基体部分に連なる膜部332〜532が少なくとも小径筒部21の軸方向端部まで延設されることで、その分、接着面積を拡大することができる。よって、仮に膜部332〜532の端部(防振基体部分に連なる部分と反対側の端部)から接着剥離が発生した場合でも、接着面積が拡大されている分、接着剥離が防振基体部分まで到達することを抑制して、耐久性の向上を図ることができる。   In addition, as described above, the film portions 332 to 532 connected to the vibration-isolating base portion are extended to at least the axial end portion of the small-diameter cylindrical portion 21, so that the bonding area can be increased accordingly. Therefore, even if the adhesion peeling occurs from the end of the film parts 332 to 532 (the end opposite to the part connected to the vibration isolating base part), the adhesion peeling is caused by the increase in the adhesion area. Durability can be improved by suppressing reaching the portion.

以上、実施の形態に基づき本発明を説明したが、本発明は上記実施の形態に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲内で種々の改良変形が可能であることは容易に推察できるものである。   The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.

上記各実施の形態で説明した数値は一例であり、他の数値を採用することは当然可能である。   The numerical values described in the above embodiments are merely examples, and other numerical values can naturally be adopted.

上記各実施の形態では、外筒部材20,220の形状として、小径筒部21,221の外周面の外径寸法が大径筒部22の内周面の内径寸法よりも大きくされる場合を説明したが、必ずしもこれに限られるものではない。即ち、外筒部材20,220は、絞り金型SMによる絞り加工(図4参照)及び切削加工(図7(a)参照)が施される前において、小径筒部21,221の外周面の外径寸法が大径筒部22の内周面の内径寸法よりも小さくされていても良い。   In each of the above embodiments, as the shape of the outer cylinder member 20, 220, the outer diameter dimension of the outer peripheral surface of the small diameter cylindrical part 21, 221 is made larger than the inner diameter dimension of the inner peripheral surface of the large diameter cylindrical part 22. Although described, it is not necessarily limited to this. That is, the outer cylindrical members 20 and 220 are formed on the outer peripheral surface of the small diameter cylindrical portions 21 and 221 before being subjected to drawing processing (see FIG. 4) and cutting processing (see FIG. 7A) by the drawing die SM. The outer diameter may be smaller than the inner diameter of the inner peripheral surface of the large-diameter cylindrical portion 22.

上記各実施の形態では説明を省略したが、外筒部材20,220の製造方法には種々の製造方法が適用できる。この製造方法としては、例えば、軸Oに沿って同径のストレートパイプの軸方向両端に絞り加工を施して径方向内方へ縮径させ、その縮径させた部分を小径筒部21,221とすることで、外筒部材20,220を製造する方法や、軸Oに沿って同径のストレートパイプの軸方向中央部を液圧などにより径方向外方へ拡径させ、その拡径させた部分を大径筒部22とすることで、外筒部材20,220を製造する方法などが例示される。   Although description is omitted in each of the above embodiments, various manufacturing methods can be applied to the manufacturing method of the outer cylindrical members 20 and 220. As this manufacturing method, for example, drawing is performed on both axial ends of a straight pipe having the same diameter along the axis O to reduce the diameter inward in the radial direction, and the reduced diameter portions are reduced diameter cylindrical portions 21, 221. As a result, the method of manufacturing the outer cylindrical members 20 and 220, or the axial central portion of the straight pipe having the same diameter along the axis O is expanded radially outward by hydraulic pressure or the like, and the diameter is increased. The method of manufacturing the outer cylinder members 20 and 220 is exemplified by using the large-diameter cylindrical portion 22 as the part.

上記各実施の形態では、すぐり部31が外筒部材20,220の大径筒部22と傾斜筒部23,223との連結部分に略一致する位置まで凹設される場合を説明したが、必ずしもこれに限られるものではなく、すぐり部31が、大径筒部22と傾斜筒部23,223との連結部分を越えて凹設されていても良く、或いは、大径筒部22と傾斜筒部23,223との連結部分まで達していなくても良い。   In each of the above embodiments, the case has been described in which the straight portion 31 is recessed to a position substantially matching the connecting portion between the large-diameter cylindrical portion 22 and the inclined cylindrical portions 23 and 223 of the outer cylindrical members 20 and 220. However, the present invention is not necessarily limited thereto, and the straight portion 31 may be recessed beyond the connecting portion between the large-diameter cylindrical portion 22 and the inclined cylindrical portions 23 and 223, or the large-diameter cylindrical portion 22 and the inclined portion may be inclined. It does not need to reach the connection part with the cylinder parts 23 and 223.

上記各実施の形態では、すぐり部31が全周にわたって凹設される場合を説明したが、必ずしもこれに限られるものではなく、周方向の一部のみに凹設されていても良く、その場合には、軸方向に貫通して形成されていても良い。或いは、すぐり部31の凹設を省略して構成しても良い。いずれの場合であっても、上記各実施の形態で説明した効果を奏することができる。   In each of the above embodiments, the case where the straight portion 31 is recessed over the entire circumference has been described. However, the present invention is not necessarily limited thereto, and may be recessed only in a part of the circumferential direction. Alternatively, it may be formed penetrating in the axial direction. Or you may comprise by omitting the recessed part of the straight part 31. FIG. In either case, the effects described in the above embodiments can be achieved.

上記第2実施の形態では、膜部232の他端側(図6下側)を平坦切除面223aに加硫接着する場合を説明したが、必ずしもこれに限られるものではなく、膜部232の他端側を平坦切除面223aに加硫接着せずに構成することは当然可能である。この場合には、平坦切除面223aへの接着剤の塗布を省略できるので、平坦切除面223aに当接してシールする各段部251d,252dへの接着剤の付着を抑制して、メンテナンス性の向上を図ることができる。   In the second embodiment, the case where the other end side (the lower side in FIG. 6) of the film part 232 is vulcanized and bonded to the flat cut surface 223 a has been described. Of course, it is possible to construct the other end without vulcanizing and bonding to the flat cut surface 223a. In this case, since the application of the adhesive to the flat cut surface 223a can be omitted, the adhesion of the adhesive to the respective step portions 251d and 252d to be in contact with and sealed against the flat cut surface 223a is suppressed, and maintenance performance is improved. Improvements can be made.

上記第2実施の形態では、外周切除面221aが傾斜筒部223だけでなく小径筒部221にも形成される(即ち、小径筒部221の外周面にも切削加工が施される)場合を説明したが、必ずしもこれに限られるものではなく、外周切除面221aが傾斜筒部223のみに形成される(即ち、小径筒部221の外周面には切削加工が施されず、傾斜筒部223のみに切削加工が施される)構成であっても良い。第2実施の形態における構成では、平坦切除面223aの面積を十分に確保して、加硫成形時のシール性の向上を図ることができ、本変形例の場合には、外筒部材220の切削加工による切除量を最小限として、外筒部材220の強度を確保できる。   In the second embodiment, a case where the outer peripheral cut surface 221a is formed not only on the inclined cylindrical portion 223 but also on the small diameter cylindrical portion 221 (that is, the outer peripheral surface of the small diameter cylindrical portion 221 is also cut). Although described above, the present invention is not necessarily limited to this, and the outer peripheral cut surface 221a is formed only in the inclined cylindrical portion 223 (that is, the outer peripheral surface of the small diameter cylindrical portion 221 is not subjected to cutting, and the inclined cylindrical portion 223 is formed. (Only the cutting process is performed). In the configuration according to the second embodiment, it is possible to secure a sufficient area of the flat cut surface 223a and improve the sealing performance at the time of vulcanization molding. The strength of the outer cylinder member 220 can be ensured by minimizing the amount of cutting by cutting.

1,201,301,401,501 防振装置
10 内筒部材
20,220 外筒部材
21,221 小径筒部
22 大径筒部
23,223 傾斜筒部
223a 平坦切除面(平坦面部)
30,230,330,430,530 防振基体
232,332,432,532 膜部
SM 絞り金型
Mdv 分割片(絞り金型の一部)
1, 201, 301, 401, 501 Vibration isolator 10 Inner cylinder member 20, 220 Outer cylinder member 21, 221 Small diameter cylinder part 22 Large diameter cylinder part 23, 223 Inclined cylinder part 223a Flat cut surface (flat surface part)
30, 230, 330, 430, 530 Anti-vibration base 232, 332, 432, 532 Film part SM Drawing die Mdv Dividing piece (part of drawing die)

Claims (4)

筒状の内筒部材と、前記内筒部材を同軸状に取り囲む筒状の外筒部材と、前記内筒部材および外筒部材を連結すると共にゴム状弾性体から構成される防振基体と、を備え、前記防振基体の成形後に前記外筒部材に絞り金型を用いた縮径方向への絞り加工が施された防振装置において、
前記外筒部材は、軸方向両端に位置する筒状の小径筒部と、前記小径筒部の間に位置し前記小径筒部よりも大径に形成される筒状の大径筒部と、前記大径筒部および小径筒部を連結し前記大径筒部から小径筒部へ向けて漸次縮径する傾斜筒部と、を備え、
前記防振基体は、少なくとも前記防振基体の大径筒部、傾斜筒部および小径筒部の内周面に加硫接着されて、前記内筒部材と外筒部材とを連結し、
前記絞り金型を用いた絞り加工が前記外筒部材の傾斜筒部および小径筒部を除き大径筒部のみに施されていることを特徴とする防振装置。
A cylindrical inner cylinder member, a cylindrical outer cylinder member that coaxially surrounds the inner cylinder member, a vibration isolating base that connects the inner cylinder member and the outer cylinder member and is formed of a rubber-like elastic body; A vibration isolator in which the outer cylinder member is subjected to a drawing process in the diameter reducing direction using a drawing die after the vibration isolating base is formed,
The outer cylinder member includes a cylindrical small-diameter cylindrical portion positioned at both ends in the axial direction, a cylindrical large-diameter cylindrical portion that is positioned between the small-diameter cylindrical portions and has a larger diameter than the small-diameter cylindrical portion, An inclined cylinder part that connects the large diameter cylinder part and the small diameter cylinder part and gradually reduces the diameter from the large diameter cylinder part toward the small diameter cylinder part,
The vibration-proof base is vulcanized and bonded to the inner peripheral surfaces of at least the large-diameter cylindrical portion, the inclined cylindrical portion, and the small-diameter cylindrical portion of the vibration-proof base, and connects the inner cylindrical member and the outer cylindrical member;
An anti-vibration device according to claim 1, wherein the drawing using the drawing mold is performed only on the large-diameter cylindrical portion except for the inclined cylindrical portion and the small-diameter cylindrical portion of the outer cylindrical member.
前記防振基体は、前記外筒部材の小径筒部の内周面に加硫接着された防振基体部分に連なり少なくとも前記小径筒部の軸方向端面に加硫接着される膜部を備えることを特徴とする請求項1記載の防振装置。   The anti-vibration base includes a film portion that is connected to the anti-vibration base portion vulcanized and bonded to the inner peripheral surface of the small-diameter cylindrical portion of the outer cylinder member and is vulcanized and bonded to at least the axial end surface of the small-diameter cylindrical portion. The vibration isolator according to claim 1. 前記防振基体の膜部は、前記外筒部材の小径筒部の内周面に加硫接着された防振基体部分に連なりつつ前記小径筒部の軸方向端面および小径筒部の外周面に加硫接着されることを特徴とする請求項2記載の防振装置。   The film portion of the vibration isolation base is connected to the vibration isolation base portion that is vulcanized and bonded to the inner peripheral surface of the small diameter cylindrical portion of the outer cylinder member, and the axial end surface of the small diameter cylindrical portion and the outer peripheral surface of the small diameter cylindrical portion. The vibration isolator according to claim 2, which is vulcanized and bonded. 前記外筒部材の傾斜筒部は、切削加工が施されることで軸方向に直交し軸方向視円環状に形成される平坦面部を備えることを特徴とする請求項3記載の防振装置。   The anti-vibration device according to claim 3, wherein the inclined cylindrical portion of the outer cylindrical member includes a flat surface portion that is orthogonal to the axial direction and formed in an annular shape when viewed in the axial direction by being cut.
JP2011066468A 2011-03-24 2011-03-24 Anti-vibration device manufacturing method Active JP5913821B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011066468A JP5913821B2 (en) 2011-03-24 2011-03-24 Anti-vibration device manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011066468A JP5913821B2 (en) 2011-03-24 2011-03-24 Anti-vibration device manufacturing method

Publications (2)

Publication Number Publication Date
JP2012202460A true JP2012202460A (en) 2012-10-22
JP5913821B2 JP5913821B2 (en) 2016-04-27

Family

ID=47183681

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011066468A Active JP5913821B2 (en) 2011-03-24 2011-03-24 Anti-vibration device manufacturing method

Country Status (1)

Country Link
JP (1) JP5913821B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014208285A1 (en) * 2013-06-27 2014-12-31 住友理工株式会社 Vibration-proof bush and method for manufacturing vibration-proof bush
EP3364065A1 (en) * 2017-02-16 2018-08-22 Toyo Tire&Rubber Co., Ltd. Torque rod, and method for manufacturing torque rod
KR20190021565A (en) * 2017-08-23 2019-03-06 현대모비스 주식회사 Bush device for vehicle

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62228725A (en) * 1985-12-26 1987-10-07 Bridgestone Corp Vibration damper rubber
JPH0238543U (en) * 1988-09-06 1990-03-14
JPH0292706A (en) * 1988-09-28 1990-04-03 Kinugawa Rubber Ind Co Ltd Vibration isolating bush
JPH04327033A (en) * 1991-04-24 1992-11-16 Toyo Tire & Rubber Co Ltd Cylindrical vibration isolation mount
JPH0575537U (en) * 1992-03-16 1993-10-15 東海ゴム工業株式会社 Anti-vibration device
JPH09203428A (en) * 1996-01-25 1997-08-05 Toyoda Gosei Co Ltd Manufacture of suspension bushing
US5887859A (en) * 1995-10-05 1999-03-30 Toyoda Gosei Co., Ltd. Suspension bushing
JPH11101304A (en) * 1997-09-26 1999-04-13 Nok Megurasutikku Kk Manufacture of bush
JP2008232195A (en) * 2007-03-16 2008-10-02 Toyo Tire & Rubber Co Ltd Manufacturing method of vibration absorbing bush and vibration absorbing bush
JP2010159860A (en) * 2009-01-09 2010-07-22 Toyo Tire & Rubber Co Ltd Vibration absorbing bush

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62228725A (en) * 1985-12-26 1987-10-07 Bridgestone Corp Vibration damper rubber
JPH0238543U (en) * 1988-09-06 1990-03-14
JPH0292706A (en) * 1988-09-28 1990-04-03 Kinugawa Rubber Ind Co Ltd Vibration isolating bush
JPH04327033A (en) * 1991-04-24 1992-11-16 Toyo Tire & Rubber Co Ltd Cylindrical vibration isolation mount
JPH0575537U (en) * 1992-03-16 1993-10-15 東海ゴム工業株式会社 Anti-vibration device
US5887859A (en) * 1995-10-05 1999-03-30 Toyoda Gosei Co., Ltd. Suspension bushing
JPH09203428A (en) * 1996-01-25 1997-08-05 Toyoda Gosei Co Ltd Manufacture of suspension bushing
JPH11101304A (en) * 1997-09-26 1999-04-13 Nok Megurasutikku Kk Manufacture of bush
JP2008232195A (en) * 2007-03-16 2008-10-02 Toyo Tire & Rubber Co Ltd Manufacturing method of vibration absorbing bush and vibration absorbing bush
JP2010159860A (en) * 2009-01-09 2010-07-22 Toyo Tire & Rubber Co Ltd Vibration absorbing bush

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014208285A1 (en) * 2013-06-27 2014-12-31 住友理工株式会社 Vibration-proof bush and method for manufacturing vibration-proof bush
JP2015010627A (en) * 2013-06-27 2015-01-19 住友理工株式会社 Vibration damping bushing and manufacturing method of vibration damping bushing
US9752637B2 (en) 2013-06-27 2017-09-05 Sumitomo Riko Company Limited Vibration damping bushing and manufacturing method of vibration damping bushing
EP3364065A1 (en) * 2017-02-16 2018-08-22 Toyo Tire&Rubber Co., Ltd. Torque rod, and method for manufacturing torque rod
KR20190021565A (en) * 2017-08-23 2019-03-06 현대모비스 주식회사 Bush device for vehicle
KR102372395B1 (en) 2017-08-23 2022-03-08 현대모비스 주식회사 Bush device for vehicle

Also Published As

Publication number Publication date
JP5913821B2 (en) 2016-04-27

Similar Documents

Publication Publication Date Title
JP5400929B2 (en) Vibration isolator
US9010716B2 (en) Vibration-damping device
WO2016047395A1 (en) Tubular antivibration device
JP2012211604A (en) Vibration-isolating device
JP5913821B2 (en) Anti-vibration device manufacturing method
JP2007218412A (en) Method for manufacturing vibration-proof bush
JP4832344B2 (en) Anti-vibration bush manufacturing method and anti-vibration bush
CN108506397B (en) Vibration-proof device
JP2006046555A (en) Liquid-filled vibration-proofing device
JP5503390B2 (en) Anti-vibration device manufacturing method
US10760642B2 (en) Liquid-filled vibration isolator
JP2007263148A (en) Member mount and its manufacturing method
JP7178914B2 (en) Anti-vibration bushing and method for manufacturing anti-vibration bushing
JP5687102B2 (en) Vibration isolator
JP2017166661A (en) Dynamic damper for propeller shaft
JP2012196705A (en) Method of manufacturing rubber vibration isolator of cylindrical shape with flange head
JP5290933B2 (en) Anti-vibration bush manufacturing method and intermediate cylinder drawing apparatus
JP2012042041A (en) Method for manufacturing antivibration rubber
JP3937352B2 (en) Vibration isolator
JP2014122661A (en) Vibration control bush
JP2019001427A (en) Vibration isolator
JP4282712B2 (en) Anti-vibration bush manufacturing method and anti-vibration bush
JP2008221897A (en) Upper support for vehicle suspension, and its manufacturing method
JP4315972B2 (en) Anti-vibration bush manufacturing method and anti-vibration bush
JP2007333077A (en) Vibration isolator

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20140130

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20141107

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20141118

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20150116

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20150203

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160122

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20160404

R150 Certificate of patent or registration of utility model

Ref document number: 5913821

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250