JP6184690B2 - Anti-vibration bush - Google Patents

Anti-vibration bush Download PDF

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JP6184690B2
JP6184690B2 JP2012282890A JP2012282890A JP6184690B2 JP 6184690 B2 JP6184690 B2 JP 6184690B2 JP 2012282890 A JP2012282890 A JP 2012282890A JP 2012282890 A JP2012282890 A JP 2012282890A JP 6184690 B2 JP6184690 B2 JP 6184690B2
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wall
inner cylinder
outer cylinder
cylinder
circumferential direction
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JP2014126125A (en
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知行 方村
知行 方村
普 前川
普 前川
利幸 北野
利幸 北野
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Description

本発明は、主として自動車のエンジンマウントやサスペンションブッシュなどとして使
用される防振ブッシュに関するものである。 The present invention relates to an anti-vibration bush used mainly as an engine mount or a suspension bush of an automobile.

従来、図６（ａ）（ｂ）に示すように、防振ブッシュ１００は、内筒１０１と、これを軸平行に取り囲む外筒１０２と、内筒１０１と外筒１０２との間に設けられたゴム状弾性体１０３を備え、ゴム状弾性体１０３が、内筒１０１の外周面と外筒１０２の内周面とを連結するように両者に加硫接着されたものが知られている。   Conventionally, as shown in FIGS. 6 (a) and 6 (b), the anti-vibration bush 100 is provided between the inner cylinder 101, the outer cylinder 102 surrounding the axis 101 in parallel, and the inner cylinder 101 and the outer cylinder 102. A rubber-like elastic body 103 is provided, and the rubber-like elastic body 103 is vulcanized and bonded to both the outer peripheral surface of the inner cylinder 101 and the inner peripheral surface of the outer cylinder 102.

この種の防振ブッシュ１００では、内筒１０１を挟んだ両側に軸方向Ｏに貫通する一対の空洞部１０４と、内筒１０１及び外筒１０２を連結する連結部１０５とをゴム状弾性体１０３に設けることで、各方向に入力される荷重の大きさや周波数等に応じて、ばね定数等を調節することがある（例えば、下記特許文献１参照）。   In this type of anti-vibration bush 100, a rubber-like elastic body 103 includes a pair of cavities 104 penetrating in the axial direction O on both sides of the inner cylinder 101 and a connecting portion 105 connecting the inner cylinder 101 and the outer cylinder 102. The spring constant or the like may be adjusted according to the magnitude or frequency of the load input in each direction (see, for example, Patent Document 1 below).

特開２０００−３４６１３４号公報JP 2000-346134 A

上記のような防振ブッシュ１００では、図６（ａ）に示すように、ゴム状弾性部１０３に設けられる空洞部１０４ａを周方向Ｃに沿って長く設けることで、空洞部１０４ａを潰す方向Ｙ１のバネ定数が低下してしまい、所望のバネ特性が得られないおそれがある。   In the anti-vibration bush 100 as described above, as shown in FIG. 6 (a), the hollow portion 104a provided in the rubber-like elastic portion 103 is provided long along the circumferential direction C, whereby the direction Y1 of crushing the hollow portion 104a. There is a possibility that desired spring characteristics may not be obtained.

一方、図６（ｂ）に示すように、空洞部１０４ａを周方向に短く設定することで、空洞部１０４ａを潰す方向Ｙ１のバネ定数を大きく設定することができるが、空洞部１０４ａの周方向Ｃに沿った長さが短くなるため、空洞部１０４ａを拡げる方向Ｙ２に荷重が入力されると、連結部１０５における外筒１０２との付け根部１０５ａに歪みが集中しやすく耐久性が低下する問題がある。   On the other hand, as shown in FIG. 6 (b), by setting the cavity 104a to be short in the circumferential direction, the spring constant in the direction Y1 for crushing the cavity 104a can be set large, but the circumferential direction of the cavity 104a Since the length along C decreases, when a load is input in the direction Y2 in which the hollow portion 104a is expanded, distortion tends to concentrate on the base portion 105a of the connecting portion 105 with the outer cylinder 102, resulting in a decrease in durability. There is.

本発明は上記問題を考慮してなされたものであり、バネ定数の低下を抑えつつ耐久性を向上させることができる防振ブッシュを提供することを目的とする。   The present invention has been made in consideration of the above problems, and an object thereof is to provide a vibration-proof bushing that can improve durability while suppressing a decrease in spring constant.

本発明に係る防振ブッシュは、内筒と、前記内筒を軸平行に取り囲む外筒と、前記内筒と前記外筒との間に設けられたゴム状弾性体とを備える防振ブッシュにおいて、前記ゴム状弾性体は、前記内筒を挟んだ両側に軸方向に貫通する一対の空洞部と、一対の前記空洞部に周方向に挟まれ前記内筒と前記外筒とを連結する一対の連結部と、前記空洞部における前記内筒側の内壁から突出して荷重が入力されていない状態で前記外筒側の内壁に当接する突起部と、前記外筒側の内壁から前記内筒側の内壁へ向けて突出し前記突起部と周方向に係止する係止部とを備え、前記突起部は、前記空洞部の周方向両端部にそれぞれ設けられ、前記係止部は、前記突起部によって周方向に挟まれた領域であって、前記空洞部の周方向両端部に設けられ、前記突起部は、荷重が入力されていない状態で前記空洞部の周方向内側において前記係止部に係止することを特徴とする。
An anti-vibration bush according to the present invention is an anti-vibration bush including an inner cylinder, an outer cylinder that surrounds the inner cylinder in an axially parallel manner, and a rubber-like elastic body provided between the inner cylinder and the outer cylinder. The rubber-like elastic body includes a pair of cavities penetrating in the axial direction on both sides of the inner cylinder, and a pair of circumferentially sandwiched between the pair of cavities to connect the inner cylinder and the outer cylinder. A projecting portion that protrudes from the inner wall on the inner cylinder side in the hollow portion and is in contact with the inner wall on the outer cylinder side when no load is input, and from the inner wall on the outer cylinder side to the inner cylinder side Projecting toward the inner wall of the cavity, and locking portions that engage with the protrusions in the circumferential direction. The protrusions are provided at both ends in the circumferential direction of the cavity, and the locking portions are the protrusions. by a region between the circumferential direction, provided on the circumferential ends of said cavity, said Electromotive unit is characterized in that locking with the locking portion in a state in which a load is not input in the circumferential direction inside the cavity.

本発明の防振ブッシュであると、バネ定数の低下を抑えつつ耐久性を向上させることができる。   With the anti-vibration bush of the present invention, durability can be improved while suppressing a decrease in the spring constant.

本発明の１実施形態に係る防振ブッシュの平面図である。It is a top view of a vibration proof bush concerning one embodiment of the present invention. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 本発明の１実施形態に係る防振ブッシュの絞り加工前の平面図である。It is a top view before the drawing process of the vibration proof bush which concerns on one Embodiment of this invention. 本発明の変更例１に係る防振ブッシュの平面図である。It is a top view of the anti-vibration bush which concerns on the modification 1 of this invention. 本発明の変更例２に係る防振ブッシュの平面図である。It is a top view of the vibration proof bush which concerns on the modification 2 of this invention. （ａ）（ｂ）は従来例に係る防振ブッシュの平面図である。(A) (b) is a top view of the anti-vibration bush which concerns on a prior art example. 本発明の１実施形態に係る防振ブッシュと従来例に係る防振ブッシュの特性を示すグラフであって、（ａ）が荷重−変位（撓み）特性、（ｂ）が歪み−変位（撓み）特性を示す。It is a graph which shows the characteristic of the anti-vibration bush which concerns on 1 embodiment of this invention, and the anti-vibration bush which concerns on a prior art example, Comprising: (a) is a load-displacement (deflection) characteristic, (b) is distortion-displacement (deflection). Show properties.

以下、本発明の１実施形態について、図面を参照して説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

本実施形態の防振ブッシュ１０は、例えば、自動車のエンジンをその後部側にて支承するエンジンマウントとして用いられるものである。   The anti-vibration bush 10 of this embodiment is used, for example, as an engine mount that supports an automobile engine on its rear side.

この防振ブッシュ１０は、図１及び図２に示すように、内筒１２と、その周りを軸平行に取り囲む外筒１４と、内筒１２と外筒１４との間に設けられたゴム状弾性体１６とを備え、内筒１２を例えばエンジン側に、外筒１４を不図示のブラケットを介して車体などの支持側に、それぞれ固定して、内筒１２の軸芯Ｏが水平になるように車両に搭載される、横置きブッシュタイプの防振装置である。   As shown in FIGS. 1 and 2, the vibration isolating bush 10 includes an inner cylinder 12, an outer cylinder 14 that surrounds the periphery thereof in an axially parallel manner, and a rubber-like shape provided between the inner cylinder 12 and the outer cylinder 14. The inner cylinder 12 is fixed to, for example, the engine side, and the outer cylinder 14 is fixed to the support side of the vehicle body or the like via a bracket (not shown) so that the axis O of the inner cylinder 12 becomes horizontal. As described above, this is a horizontal bush type vibration isolator mounted on a vehicle.

内筒１２及び外筒１４は、いずれも円筒状の金属製部材であり、図２に示すように、外筒１４が内筒１２よりも薄肉に設けられ、軸方向Ｘにおける寸法が短く設定されている。   The inner cylinder 12 and the outer cylinder 14 are both cylindrical metal members. As shown in FIG. 2, the outer cylinder 14 is provided thinner than the inner cylinder 12, and the dimension in the axial direction X is set shorter. ing.

ゴム状弾性体１６は、内筒１２と外筒１４に加硫接着して設けられており、図２に示すように、内筒１２を頂部とする略逆Ｖ字状に形成されている。   The rubber-like elastic body 16 is provided by being vulcanized and bonded to the inner cylinder 12 and the outer cylinder 14, and is formed in a substantially inverted V shape with the inner cylinder 12 at the top, as shown in FIG.

このゴム状弾性部１６は、軸方向Ｘに垂直な第１軸直方向Ｙに内筒１２を挟んで対向する位置に、軸方向Ｘに貫通する一対の空洞部２０が設けられており、これにより、内筒１２と外筒１４との間に一対の連結部２２が区画形成されている。   The rubber-like elastic portion 16 is provided with a pair of hollow portions 20 penetrating in the axial direction X at positions facing the inner cylinder 12 in the first axial direction Y perpendicular to the axial direction X. Thus, a pair of connecting portions 22 is defined between the inner cylinder 12 and the outer cylinder 14.

一対の連結部２２は、一対の空洞部２０で周方向Ｃに挟まれた位置において、内筒１２の外周面と外筒１４の内周面とを第１軸直方向Ｙに垂直な第２軸直方向Ｚに連結することで、空洞部２０が設けられた第１軸直方向Ｙに比べて第２軸直方向Ｚのバネ定数を高く設定する。   The pair of connecting portions 22 are second perpendicular to the first axial direction Y between the outer peripheral surface of the inner cylinder 12 and the inner peripheral surface of the outer cylinder 14 at a position sandwiched in the circumferential direction C by the pair of cavities 20. By connecting in the axial direction Z, the spring constant in the second axial direction Z is set higher than in the first axial direction Y in which the cavity 20 is provided.

一対の空洞部２０のうちの一方の空洞部２０ａは、図１に示すような軸方向視において、周方向Ｃに沿って延び、内筒１２の第２軸直方向Ｚの外方まで延設されている。この空洞部２０ａを区画する内壁２１には、突起部２６と係止部２８とが形成されている。   One cavity 20a of the pair of cavities 20 extends along the circumferential direction C and extends outward in the second axial direction Z of the inner cylinder 12 as viewed in the axial direction as shown in FIG. Has been. On the inner wall 21 that divides the hollow portion 20a, a protruding portion 26 and a locking portion 28 are formed.

より詳細には、内筒１２側の内壁２１ａ及び外筒１４側の内壁２１ｂの一方の内壁（この実施形態では、内筒１２側の内壁２１ａ）から他方の内壁（外筒１４側の内壁２１ｂ）へ向けて突出する突起部２６が設けられている。この突起部２６は、空洞部２０ａの周方向Ｃの両端部に設けられ、内筒１２より第２軸直方向Ｚの外方に配置されており、連結部２２における外筒１４との付け根部２２ａから突出し、突起部２６の先端部が外筒１４側の内壁２１ｂに当接している。   More specifically, the inner wall 21a on the inner cylinder 12 side and the inner wall 21b on the outer cylinder 14 side from one inner wall (in this embodiment, the inner wall 21a on the inner cylinder 12 side) to the other inner wall (the inner wall 21b on the outer cylinder 14 side). ) Projecting toward the). The protrusions 26 are provided at both ends in the circumferential direction C of the hollow portion 20a, and are disposed outward in the second axial direction Z from the inner tube 12, and are connected to the outer tube 14 at the connecting portion 22. It protrudes from 22a, and the front-end | tip part of the protrusion part 26 is contact | abutting to the inner wall 21b by the side of the outer cylinder 14. FIG.

係止部２８は、突起部２６が設けられた内壁２１ａに対向する外筒１４側の内壁２１ｂから内筒１２側の内壁２１ａに向けて突出形成されており、突起部２６の先端部が空洞部２０の周方向内側において係止部２８に当接している。これにより、突起部２６と係止部２８とが周方向Ｃに係止している。   The locking portion 28 is formed so as to protrude from the inner wall 21b on the outer tube 14 side facing the inner wall 21a provided with the protruding portion 26 toward the inner wall 21a on the inner tube 12 side, and the tip of the protruding portion 26 is hollow. It is in contact with the locking portion 28 on the inner side in the circumferential direction of the portion 20. As a result, the protrusion 26 and the locking portion 28 are locked in the circumferential direction C.

また、空洞部２０ａの外筒１４側の内壁２１ｂには、内筒１２側の内壁２１ａに向けて突出するストッパ部２４が形成されている。   In addition, a stopper portion 24 that protrudes toward the inner wall 21a on the inner cylinder 12 side is formed on the inner wall 21b on the outer cylinder 14 side of the hollow portion 20a.

上記のような防振ブッシュ１０は、内筒１２の外周面と外筒１４の内周面とがゴム状弾性体１６の加硫成形により一体に加硫接着された後、不図示のダイスを用いて外筒１４が縮径方向に絞り加工され得られる。   The anti-vibration bush 10 as described above is formed by attaching a die (not shown) after the outer peripheral surface of the inner cylinder 12 and the inner peripheral surface of the outer cylinder 14 are integrally vulcanized and bonded by vulcanization molding of the rubber-like elastic body 16. By using this, the outer cylinder 14 can be drawn in the reduced diameter direction.

より具体的には、図３に示すように、内筒１２と外筒１４とをゴム状弾性部１６で加硫接着した絞り加工前の防振ブッシュ１０’では、空洞部２０と連結部２２とストッパ部２４と突起部２６と係止部２８とを備えたゴム状弾性部１６が、内筒１２と外筒１４との間に加硫成形されている。絞り加工前のゴム状弾性部１６に設けられた突起部２６の先端部は、対向する外筒１４側の内壁２１ｂから離間しており、内壁２１ｂに設けられた係止部２８に当接していない。   More specifically, as shown in FIG. 3, in the anti-vibration bushing 10 ′ before drawing, in which the inner cylinder 12 and the outer cylinder 14 are vulcanized and bonded by the rubber-like elastic portion 16, the cavity portion 20 and the connecting portion 22 are provided. A rubber-like elastic portion 16 having a stopper portion 24, a protrusion portion 26, and a locking portion 28 is vulcanized between the inner cylinder 12 and the outer cylinder 14. The tip of the protrusion 26 provided on the rubber-like elastic part 16 before drawing is separated from the inner wall 21b on the side of the opposed outer cylinder 14, and is in contact with a locking part 28 provided on the inner wall 21b. Absent.

そして、内筒１２及び外筒１４にゴム状弾性体１６が加硫接着された防振ブッシュ１０’の外筒１４に対して絞り加工が施されて縮径されることによりゴム状弾性体１６が予圧縮され、内筒１２側の内壁２１ａから突出する突起部２６の先端部が、外筒１４側の内壁２１ｂに当接するとともに、外筒１４側の内壁２１ｂに設けられた係止部２８と周方向Ｃに係止する。   The rubber-like elastic body 16 is reduced by reducing the diameter of the outer cylinder 14 of the vibration-isolating bushing 10 ′ in which the rubber-like elastic body 16 is vulcanized and bonded to the inner cylinder 12 and the outer cylinder 14. Is pre-compressed and the tip of the protruding portion 26 protruding from the inner wall 21a on the inner cylinder 12 side abuts on the inner wall 21b on the outer cylinder 14 side, and the locking portion 28 provided on the inner wall 21b on the outer cylinder 14 side. And in the circumferential direction C.

以上のような構成の防振ブッシュ１０では、ゴム状弾性部１６に設けた空洞部２０ａを周方向Ｃに沿って長く設けられている。そのため、防振ブッシュ１０に対して空洞部２０ａを拡げる方向Ｙ２に荷重が入力されても、図６（ｂ）に示す従来例２に係る防振ブッシュ１００に比べ、図７（ａ）に示すように、連結部２２における外筒１４との付け根部２２ａに歪みが集中しにくくなり、防振ブッシュ１０の耐久性を向上させることができる。   In the anti-vibration bush 10 having the above-described configuration, the hollow portion 20a provided in the rubber-like elastic portion 16 is provided long along the circumferential direction C. Therefore, even if a load is input in the direction Y2 in which the hollow portion 20a is expanded with respect to the vibration isolating bush 10, the vibration isolating bush 100 shown in FIG. As described above, the strain is less likely to concentrate on the root portion 22a of the connecting portion 22 with the outer cylinder 14, and the durability of the vibration isolating bush 10 can be improved.

また、本実施形態の防振ブッシュ１０では、空洞部２０ａの内壁２１から突出する突起部２６が対向する内壁２１に当接しているため、防振ブッシュ１０に対して空洞部２０ａを潰す方向Ｙ１に荷重が入力されても、突起部２６で荷重を受けることができ、当該方向Ｙ１のバネ定数の低下を抑えることができる。   Further, in the vibration isolating bush 10 of the present embodiment, the protruding portion 26 protruding from the inner wall 21 of the cavity portion 20a is in contact with the opposing inner wall 21, so the direction Y1 of crushing the cavity portion 20a with respect to the vibration isolating bush 10 Even if a load is input to the projection, the projection 26 can receive the load, and a decrease in the spring constant in the direction Y1 can be suppressed.

また、本実施形態の防振ブッシュ１０では、空洞部２０ａの内壁２１から突出する突起部２６が対向する内壁２１に当接しているため、防振ブッシュ１０に対して空洞部２０ａを潰す方向Ｙ１に荷重が入力されても突起部２６で荷重を受けることができる。そのため、図６（ａ）に示す従来例１に係る防振ブッシュ１００に比べ、図７（ｂ）に示すように、防振ブッシュ１０に対して空洞部２０ａを潰す方向Ｙ１のバネ定数の低下を抑えることができる。   Further, in the vibration isolating bush 10 of the present embodiment, the protruding portion 26 protruding from the inner wall 21 of the cavity portion 20a is in contact with the opposing inner wall 21, so the direction Y1 of crushing the cavity portion 20a with respect to the vibration isolating bush 10 Even if a load is input to the projection 26, the projection 26 can receive the load. Therefore, compared to the vibration isolating bush 100 according to the conventional example 1 shown in FIG. 6A, as shown in FIG. 7B, the spring constant in the direction Y1 in which the cavity 20a is crushed with respect to the vibration isolating bush 10 is reduced. Can be suppressed.

しかも、突起部２６に対向する外筒１４側の内壁２１ｂには、突起部２６と周方向Ｃに係止する係止部２８が設けられているため、防振ブッシュ１０に対して空洞部２０ａを潰す方向Ｙ１に荷重が入力された際に突起部２６の先端部が、空洞部２０ａの外筒１４側の内壁２１ｂに沿って周方向Ｃへ滑りにくくなり、突起部２６で荷重を確実に受けることができるとともに、突起部２６と内壁２１ｂとの擦れ合いによる異音の発生を抑えることができる。   In addition, since the inner wall 21b on the outer cylinder 14 side facing the protruding portion 26 is provided with a locking portion 28 that locks in the circumferential direction C with the protruding portion 26, the cavity portion 20a with respect to the vibration isolating bush 10 is provided. When a load is input in the direction Y1 for crushing, the tip of the protrusion 26 is less likely to slip in the circumferential direction C along the inner wall 21b on the outer cylinder 14 side of the cavity 20a, and the protrusion 26 ensures the load. While being able to receive, generation | occurrence | production of the noise by the friction of the projection part 26 and the inner wall 21b can be suppressed.

また、本実施形態では、突起部２６が、周方向Ｃの両端部に設けられ、空洞部２０ａを拡げる方向Ｙ２に荷重が入力された際に歪みが集中しやすい連結部２２の付け根部２２ａから突出しているため、連結部２２に集中する歪みを効果的に緩和することができ、防振ブッシュ１０の耐久性を向上させることができる。   Further, in the present embodiment, the protrusions 26 are provided at both ends in the circumferential direction C, and from the base portion 22a of the connecting portion 22 where distortion tends to concentrate when a load is input in the direction Y2 in which the cavity 20a is expanded. Since it protrudes, the distortion which concentrates on the connection part 22 can be relieve | moderated effectively, and durability of the anti-vibration bush 10 can be improved.

なお、上記した本実施形態では、一対の空洞部２０のうち一方の空洞部２０ａの内筒１２側の内壁２１ａに突起部２６を設け、外筒１４側の内壁２１ｂに係止部２８を設ける場合について説明したが、本発明はこれに限定されず、例えば、図４のように、空洞部２０ａの外筒１４側の内壁２１ｂから突起部２６を突出させ内筒１２側の内壁２１ａに当接させたり、あるいは、図５のように一対の空洞部２０の両方に突起部２６を設けてもよい。その他、一々列挙しないが、本発明の趣旨を逸脱しない限り、種々の変更が可能である。   In the above-described embodiment, the protruding portion 26 is provided on the inner wall 21a on the inner cylinder 12 side of one of the hollow portions 20a, and the locking portion 28 is provided on the inner wall 21b on the outer cylinder 14 side. Although the present invention has been described, the present invention is not limited to this. For example, as shown in FIG. 4, the protruding portion 26 protrudes from the inner wall 21b on the outer cylinder 14 side of the cavity portion 20a and contacts the inner wall 21a on the inner cylinder 12 side. Alternatively, the protrusions 26 may be provided on both of the pair of cavities 20 as shown in FIG. Although not enumerated one by one, various modifications can be made without departing from the spirit of the present invention.

１０…防振ブッシュ
１２…内筒
１４…外筒
１６…ゴム状弾性体
２０…空洞部
２２…連結部
２２ａ…付け根
２４…ストッパ部
２６…突起部
２８…係止部 DESCRIPTION OF SYMBOLS 10 ... Anti-vibration bush 12 ... Inner cylinder 14 ... Outer cylinder 16 ... Rubber-like elastic body 20 ... Hollow part 22 ... Connection part 22a ... Base 24 ... Stopper part 26 ... Projection part 28 ... Locking part

Claims (2)

内筒と、前記内筒を軸平行に取り囲む外筒と、前記内筒と前記外筒との間に設けられたゴム状弾性体とを備える防振ブッシュにおいて、
前記ゴム状弾性体は、前記内筒を挟んだ両側に軸方向に貫通する一対の空洞部と、一対の前記空洞部に周方向に挟まれ前記内筒と前記外筒とを連結する一対の連結部と、前記空洞部における前記内筒側の内壁から突出して荷重が入力されていない状態で前記外筒側の内壁に当接する突起部と、前記外筒側の内壁から前記内筒側の内壁へ向けて突出し前記突起部と周方向に係止する係止部とを備え、
前記突起部は、前記空洞部の周方向両端部にそれぞれ設けられ、
前記係止部は、前記突起部によって周方向に挟まれた領域であって、前記空洞部の周方向両端部に設けられ、
前記突起部は、荷重が入力されていない状態で前記空洞部の周方向内側において前記係止部に係止することを特徴とする防振ブッシュ。 In an anti-vibration bush comprising an inner cylinder, an outer cylinder that surrounds the inner cylinder in an axially parallel manner, and a rubber-like elastic body provided between the inner cylinder and the outer cylinder,
The rubber-like elastic body includes a pair of cavities penetrating in the axial direction on both sides of the inner cylinder, and a pair of cavities sandwiched between the pair of cavities in the circumferential direction to connect the inner cylinder and the outer cylinder. A connecting portion; a protrusion projecting from the inner wall on the inner cylinder side in the cavity portion; and a contact portion contacting the inner wall on the outer cylinder side in a state where no load is input; and an inner wall side on the inner cylinder side from the inner wall on the outer cylinder side A protrusion that projects toward the inner wall and includes a locking portion that locks in the circumferential direction with the protruding portion;
The protrusions are provided at both ends in the circumferential direction of the cavity,
The locking portion is a region sandwiched between the protrusions in the circumferential direction, and is provided at both circumferential ends of the cavity portion ,
The anti-vibration bushing, wherein the protruding portion is locked to the locking portion on the inner side in the circumferential direction of the hollow portion in a state where no load is input . 一対の前記空洞部が第１軸直方向に前記内筒を挟んで設けられ、
前記突起部が前記内筒より前記第１軸直方向及び前記内筒の軸方向に垂直な第２軸直方向の外方に位置することを特徴とする請求項１に記載の防振ブッシュ。 A pair of the hollow portions are provided across the inner cylinder in a direction perpendicular to the first axis,
2. The anti-vibration bushing according to claim 1, wherein the protruding portion is located outward from the inner cylinder in the first axial direction and the second axial direction perpendicular to the axial direction of the inner cylinder.
JP2012282890A 2012-12-26 2012-12-26 Anti-vibration bush Expired - Fee Related JP6184690B2 (en)

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JPS592608U (en) * 1982-06-29 1984-01-09 日産自動車株式会社 Button for transverse link
JPH0128355Y2 (en) * 1985-02-28 1989-08-29
JPS6387338U (en) * 1986-11-27 1988-06-07
JPH0725476Y2 (en) * 1989-07-06 1995-06-07 東洋ゴム工業株式会社 Anti-vibration body for suspension members
JPH07293619A (en) * 1994-04-26 1995-11-07 Kurashiki Kako Co Ltd Bush-type engine mount
JP2008094255A (en) * 2006-10-12 2008-04-24 Toyota Motor Corp Suspension bush
JP2009108906A (en) * 2007-10-29 2009-05-21 Kurashiki Kako Co Ltd Vibration damper

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