JP5714363B2 - Anti-vibration connecting rod - Google Patents

Description

本発明は、例えば自動車のエンジンを車体に対して防振しながら連結するトルクロッド等として用いることのできる防振連結ロッドに関するものである。   The present invention relates to an anti-vibration connecting rod that can be used as, for example, a torque rod for connecting an automobile engine to a vehicle body while preventing vibration.

自動車の車体と振動発生源であるエンジンとの間には、エンジンのロール方向の動きや振動を抑制するためにトルクロッドと称される防振連結ロッドが設けられている。   An anti-vibration connecting rod called a torque rod is provided between an automobile body and an engine which is a vibration generation source in order to suppress movement and vibration in the roll direction of the engine.

かかる防振連結ロッドとして、例えば、長手方向の一端部に設けられた第１筒部と、長手方向の他端部に設けられた第２筒部と、第１筒部と第２筒部とを連結するロッド本体と、第１内筒と第１ゴム状弾性部とを備えて第１筒部内に設けられた第１防振ブッシュと、第２内筒と第２ゴム状弾性部とを備えて第２筒部内に設けられた第２防振ブッシュとを備えたものが知られている（下記特許文献１参照）。   As such an anti-vibration connecting rod, for example, a first cylinder part provided at one end part in the longitudinal direction, a second cylinder part provided at the other end part in the longitudinal direction, a first cylinder part and a second cylinder part, A rod body that connects the first body, a first inner cylinder and a first rubber-like elastic part, and a first vibration isolating bush provided in the first cylinder part; a second inner cylinder and a second rubber-like elastic part; The thing provided with the 2nd anti-vibration bush provided in the 2nd cylinder part is known (refer the following patent document 1).

上記の防振連結ロッドでは、バネ特性の調整等を目的として、第１筒部と第１防振ブッシュとの間あるいは第２筒部と第２防振ブッシュとの間の少なくとも一方に隙間を設ける場合がある。このような隙間を設けた防振連結ロッドの場合、第１筒部あるいは第２筒部の軸方向を水平方向に配置した状態で第１内筒及び第２内筒を取付部材としてエンジンや車体に取り付けると、上記の隙間に水が溜まりやすく、ロッド本体に錆が生じる等といった防振連結ロッドの劣化が起こりやすいという問題がある。   In the vibration-isolating connecting rod described above, a gap is provided between at least one of the first tube portion and the first vibration-isolating bush or between the second tube portion and the second anti-vibration bush for the purpose of adjusting spring characteristics and the like. May be provided. In the case of the anti-vibration connecting rod provided with such a gap, an engine or a vehicle body with the first inner cylinder and the second inner cylinder as mounting members in a state where the axial direction of the first cylinder part or the second cylinder part is arranged horizontally. When attached to, there is a problem that water tends to accumulate in the gap and the vibration-proof connecting rod is likely to deteriorate, such as rusting in the rod body.

特開２００７−１９２２４０号公報JP 2007-192240 A

本発明は上記問題を考慮してなされたものであり、第１筒部あるいは第２筒部の軸方向を水平方向に配置して取り付ける場合であっても、第１筒部と第１防振ブッシュとの間や第２筒部と第２防振ブッシュとの間に水が溜まりにくく、防振連結ロッドの劣化を抑えることができる防振連結ロッド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 even when the axial direction of the first cylinder part or the second cylinder part is arranged in the horizontal direction and attached, the first cylinder part and the first vibration isolation are provided. It is an object of the present invention to provide an anti-vibration connecting rod that is unlikely to collect water between the bushing or between the second tube portion and the second anti-vibration bush and that can suppress deterioration of the anti-vibration connecting rod.

本発明に係る防振連結ロッドは、長手方向の一端部に設けられた第１筒部と、長手方向の他端部に設けられた第２筒部と、前記第１筒部と前記第２筒部とを連結するロッド本体と、第１内筒と前記第１内筒の外周部を覆う第１ゴム状弾性部とを備えて前記第１筒部内に設けられた第１防振ブッシュと、第２内筒と第２ゴム状弾性部とを備えて前記第２筒部内に設けられた第２防振ブッシュとを備え、前記ロッド本体が、第１金属板と、前記第１金属板に重ね合わせられた第２金属板とをかしめ固定してなる防振連結ロッドにおいて、前記第１ゴム状弾性部は、前記第１内筒の外周面から径方向外方に突出する凸部を備え、前記ロッド本体は、前記第１筒部の内周面が径方向外方に陥没し前記凸部が嵌り込む収容部と、前記第１金属板と前記第２金属板との間に前記収容部と連通し前記ロッド本体の周縁に開口する連通路とを備え、前記連通路は、前記第１金属板と前記第２金属板とが間隔をあけて対向することで形成されていることを特徴とする。 The vibration-isolating connecting rod according to the present invention includes a first tube portion provided at one end portion in the longitudinal direction, a second tube portion provided at the other end portion in the longitudinal direction, the first tube portion, and the second tube portion. A first vibration isolating bush provided in the first cylindrical portion, the rod main body connecting the cylindrical portion; a first inner cylinder; and a first rubber-like elastic portion covering an outer peripheral portion of the first inner cylinder. A second vibration isolating bush provided in the second cylinder portion with a second inner cylinder and a second rubber-like elastic portion, wherein the rod body includes a first metal plate and the first metal plate. In the anti-vibration connecting rod formed by caulking and fixing the second metal plate superimposed on the first metal-like elastic portion, the first rubber-like elastic portion has a convex portion protruding radially outward from the outer peripheral surface of the first inner cylinder. The rod body includes an accommodating portion in which an inner peripheral surface of the first cylindrical portion is depressed radially outwardly and the convex portion is fitted, the first metal plate, and the first And a communicating passage which opens into the periphery of the rod body communicating with the receiving portion between the metal plate, wherein the communication passage includes a first metal plate and the second metal plate is opposed with a gap It characterized that you have been formed by.

本発明に係る防振連結ロッドでは、ロッド本体が、第１筒部の内周面に径方向外方へ陥没し凸部が嵌り込む収容部と、第１金属板と第２金属板との間に収容部と連通しロッド本体の周縁に開口する連通路とを備えるため、第１筒部の軸方向を水平方向に配置しても収容部に浸入した水が連通路よりロッド本体の外部へ排出され、防振連結ロッドの劣化を抑えることができる。   In the anti-vibration connecting rod according to the present invention, the rod main body includes an accommodating portion into which the convex portion is fitted into the inner peripheral surface of the first cylindrical portion, and the first metal plate and the second metal plate. Since the communicating portion is provided between and the communicating passage that opens to the periphery of the rod body, water that has entered the housing portion from the communicating passage to the outside of the rod body even if the axial direction of the first tube portion is arranged in the horizontal direction. And the deterioration of the vibration proof connecting rod can be suppressed.

また、上記の防振連結ロッドにおいて、ロッド本体は、周縁部を除く位置に第１金属板と第２金属板とが間隔をあけて対向する空隙部を備えてもよく、このような場合において、連通路は、空隙部に比べて第１金属板と第２金属板との間隔が大きく設けられてもよい。これにより、ロッド本体を構成する第１金属板と第２金属板とが擦れ合いにくくなり、異音の発生を抑えることができる。   Further, in the above-described vibration-isolating connecting rod, the rod body may include a gap portion where the first metal plate and the second metal plate are opposed to each other at a position excluding the peripheral portion. The communication path may be provided with a larger distance between the first metal plate and the second metal plate than the gap portion. Thereby, the 1st metal plate and 2nd metal plate which comprise a rod main part become difficult to rub against each other, and generation | occurrence | production of abnormal noise can be suppressed.

本発明では、第１筒部あるいは第２筒部の軸方向を水平方向に配置して取り付けられる場合であっても、第１筒部と第１防振ブッシュとの間や第２筒部と第２防振ブッシュとの間に水が溜まりにくく、ロッド本体に錆が生じる等の防振連結ロッドの劣化を抑えることができる。   In the present invention, even if the axial direction of the first tube portion or the second tube portion is disposed in the horizontal direction, the space between the first tube portion and the first vibration isolating bush or the second tube portion It is difficult for water to collect between the second anti-vibration bush and deterioration of the anti-vibration connecting rod such as rusting on the rod body can be suppressed.

本発明の一実施形態に係る防振連結ロッドの平面図である。It is a top view of the vibration isolating connecting rod which concerns on one Embodiment of this invention. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 本発明の一実施形態に係る防振連結ロッドの側面図である。It is a side view of the vibration isolating connecting rod which concerns on one Embodiment of this invention. 図１のＡ−Ａ断面図であって第１防振ブッシュ及び第２防振ブッシュを取り除いた状態を示す図である。It is AA sectional drawing of FIG. 1, and is a figure which shows the state which removed the 1st anti-vibration bush and the 2nd anti-vibration bush. 図１のＢ−Ｂ断面図である。It is BB sectional drawing of FIG.

以下、本発明の一実施形態について、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.

本実施形態の防振連結ロッド１０は、自動車の車体と振動発生源であるエンジンとの間に組付けられて、エンジンのロール方向の動きや振動を抑制するトルクロッドである。   The anti-vibration connecting rod 10 of this embodiment is a torque rod that is assembled between a vehicle body of an automobile and an engine that is a vibration generation source, and suppresses movement and vibration in the roll direction of the engine.

この防振連結ロッド１０は、図１に示すように、第１筒部１２と第２筒部１４とを備えたロッド本体１６と、第１内部１２に設けられた第１防振ブッシュ１８と、第２筒部１４内に設けられた第２防振ブッシュ２０とからなる。   As shown in FIG. 1, the vibration-isolating connecting rod 10 includes a rod body 16 having a first cylinder portion 12 and a second cylinder portion 14, a first vibration-isolating bush 18 provided in the first interior 12, and And the second vibration isolating bush 20 provided in the second cylinder portion 14.

第１防振ブッシュ１８は、図２に示すように、第１筒部１２内に軸平行に配された第１内筒２２と、第１内筒２２の外周面を覆い第１内筒２２と第１筒部１２の間に介設された第１ゴム状弾性部２４とから構成される。   As shown in FIG. 2, the first anti-vibration bush 18 covers the first inner cylinder 22 disposed in parallel with the first cylinder portion 12 and the outer peripheral surface of the first inner cylinder 22, and the first inner cylinder 22. And a first rubber-like elastic portion 24 interposed between the first cylindrical portion 12 and the first cylindrical portion 12.

第１内筒２２は、鉄、鋼やアルミニウムなどの金属製の円筒状の部材であり、車体とエンジンのいずれか一方、例えば車体側に連結される。第１ゴム状弾性部２４は、第１内筒２２の外周面に一体に加硫接着されたもので、第１内筒２２の外周面における互いに対向する位置から径方向外方に突出する一対の凸部２６を備える。   The first inner cylinder 22 is a cylindrical member made of metal such as iron, steel, and aluminum, and is connected to either the vehicle body or the engine, for example, the vehicle body side. The first rubber-like elastic portion 24 is integrally vulcanized and bonded to the outer peripheral surface of the first inner cylinder 22, and is a pair that protrudes radially outward from positions facing each other on the outer peripheral surface of the first inner cylinder 22. The convex part 26 is provided.

第２防振ブッシュ２０は、円筒状に設けられた第２筒部１４内に軸平行かつ同軸状に配された第２内筒２８と、第２内筒２８の外周面を覆い第２内筒２８と第２筒部１４の間に介設された第２ゴム状弾性部３０とから構成される。   The second anti-vibration bush 20 covers the second inner cylinder 28 that is arranged in parallel and coaxially in the second cylindrical portion 14 provided in a cylindrical shape, and covers the outer peripheral surface of the second inner cylinder 28. It is comprised from the 2nd rubber-like elastic part 30 interposed between the pipe | tube 28 and the 2nd cylinder part 14. As shown in FIG.

第２内筒２８は、第１内筒２２と同様、鉄、鋼やアルミニウムなどの金属製の円筒状の部材であり、車体とエンジンのいずれか一方、例えばエンジン側に連結される。第２ゴム状弾性部３０は、第２内筒２８の外周面に一体に加硫接着されたもので、第２内筒２８の軸方向の中央部に径方向外方へ膨出する環状の膨出部３２を備える。   Similar to the first inner cylinder 22, the second inner cylinder 28 is a cylindrical member made of metal such as iron, steel, or aluminum, and is connected to either the vehicle body or the engine, for example, the engine side. The second rubber-like elastic portion 30 is integrally vulcanized and bonded to the outer peripheral surface of the second inner cylinder 28, and has an annular shape that bulges outward in the radial direction at the axial central portion of the second inner cylinder 28. A bulging portion 32 is provided.

ロッド本体１６は、長手方向Ｌの一端部に第１防振ブッシュ１８を保持する第１筒部１２と、他端部に第２防振ブッシュ２０を保持する第２筒部１４と、第１筒部１２及び第２筒部１４を連結する連結部１５とを備え、互いに同一形状をなした第１金属板３４と第２金属板３６とを重ね合わせることで形成されている。   The rod body 16 includes a first cylinder portion 12 that holds the first vibration isolating bush 18 at one end in the longitudinal direction L, a second cylinder portion 14 that holds the second vibration isolating bush 20 at the other end, The cylindrical portion 12 and the second cylindrical portion 14 are connected to each other, and the first metal plate 34 and the second metal plate 36 having the same shape are overlapped with each other.

詳細には、第１筒部１２は、開口部が角を丸めた矩形状をなした筒形状に設けられており、その内周面に外方へ陥没する一対の第１ゴム収容部３８が設けられている。この一対の第１ゴム収容部３８は、第１防振ブッシュ１８の第１ゴム状弾性部２４に設けられた凸部２６が予圧縮された状態で嵌り込み第１防振ブッシュ１８を保持する凹形状をなしており、第１筒部１２に設けられた第１防振ブッシュ１８の第１内筒２２の軸心Ｏ１と、第２筒部１４に設けられた第２防振ブッシュ２０の第２内筒２８の軸心Ｏ２とを結ぶ直線（以下、中心線という）Ｃを対称軸とする線対称位置、言い換えれば、中心線Ｃ及び第１筒部１２の軸方向に対して垂直な方向（以下、防振連結ロッド１０の幅方向という）Ｗに対向配置されている。   Specifically, the first cylinder portion 12 is provided in a cylindrical shape having a rectangular shape with rounded corners, and a pair of first rubber accommodating portions 38 that are recessed outwardly on the inner peripheral surface thereof. Is provided. The pair of first rubber accommodating portions 38 is fitted and holds the first vibration isolating bush 18 in a state where the convex portion 26 provided on the first rubber elastic portion 24 of the first vibration isolating bush 18 is pre-compressed. It has a concave shape, and the axial center O1 of the first inner cylinder 22 of the first vibration isolation bush 18 provided in the first cylinder portion 12 and the second vibration isolation bush 20 provided in the second cylinder portion 14 A line symmetric position with a straight line C (hereinafter referred to as a center line) C connecting to the axis O2 of the second inner cylinder 28 as a symmetry axis, in other words, perpendicular to the center line C and the axial direction of the first cylinder portion 12. Oppositely arranged in a direction (hereinafter referred to as the width direction of the vibration-isolating connecting rod 10) W.

図３及び図４に示すように第１ゴム収容部３８の底部（防振連結ロッド１０の幅方向Ｗに対して垂直な平面部）３９には、ロッド本体１６の周縁に開口する連通路７０が設けられており第１ゴム収容部３８とロッド本体１６の外部とを連通している。連通路７０は、第１金属板３４と第２金属板３６とが所定の間隔（例えば、２〜４ｍｍ）をあけて対向することで形成されている。   As shown in FIGS. 3 and 4, a communication path 70 that opens to the periphery of the rod body 16 is formed in the bottom 39 (a plane portion perpendicular to the width direction W of the vibration-isolating connecting rod 10) 39 of the first rubber accommodating portion 38. The first rubber accommodating portion 38 and the outside of the rod main body 16 are communicated with each other. The communication path 70 is formed by the first metal plate 34 and the second metal plate 36 facing each other with a predetermined interval (for example, 2 to 4 mm).

このような第１筒部１２は、中心線Ｃの延びる方向において第１防振ブッシュ１８の第１ゴム状弾性部２４と第１筒部１２の内周面との間に間隙１３を設けつつ、一対の第１ゴム収容部３８で第１防振ブッシュ１８を保持する。   Such a first tube portion 12 is provided with a gap 13 between the first rubber-like elastic portion 24 of the first vibration isolating bush 18 and the inner peripheral surface of the first tube portion 12 in the direction in which the center line C extends. The first vibration isolating bush 18 is held by the pair of first rubber accommodating portions 38.

第２筒部１４は、円筒状に設けられており、その内周面に外方へ陥没する環状の第２ゴム収容部４０が設けられている。第２ゴム収容部４０は、第２防振ブッシュ２０の第２ゴム状弾性部３０に設けられた環状の膨出部３２が嵌り込み、第２防振ブッシュ２０を保持する。   The 2nd cylinder part 14 is provided in the cylindrical shape, and the cyclic | annular 2nd rubber accommodating part 40 which sinks outward is provided in the internal peripheral surface. In the second rubber accommodating portion 40, an annular bulging portion 32 provided in the second rubber-like elastic portion 30 of the second vibration isolating bush 20 is fitted, and the second vibration isolating bush 20 is held.

第１筒部１２と第２筒部１４とを連結する連結部１５には、第１金属板３４及び第２金属板３６を貫通する貫通孔６０が複数（本実施形態では２つ）設けられている（図１お、図５参照）。２つの貫通孔６０は、中心線Ｃを対称軸とする線対称位置に、つまり、２つの貫通孔６０を結ぶ直線が中心線Ｃに直交し、かつ、中心線Ｃまでの距離が等しい位置に設けられている。   A plurality of through holes 60 (two in this embodiment) penetrating the first metal plate 34 and the second metal plate 36 are provided in the connecting portion 15 that connects the first tube portion 12 and the second tube portion 14. (See FIGS. 1 and 5). The two through holes 60 are in a line-symmetric position with the center line C as the axis of symmetry, that is, in a position where the straight line connecting the two through holes 60 is orthogonal to the center line C and the distance to the center line C is equal. Is provided.

ロッド本体１６を構成する第１金属板３４は、図１、図４及び図５に示すように、金属板を所定形状にプレス成形したものであり、その長手方向Ｌの一端部に角を丸めた矩形状の第１矩形孔部４２が、他端部に円形状の第１円孔部４６がそれぞれ穿設されるとともに、第１矩形孔部４２と第１円孔部４６との間に２つの貫通孔６０ａが穿設されている。   As shown in FIGS. 1, 4 and 5, the first metal plate 34 constituting the rod body 16 is formed by press-molding a metal plate into a predetermined shape, and rounds corners at one end in the longitudinal direction L. The rectangular first rectangular hole portion 42 is formed with a circular first circular hole portion 46 at the other end, and the first rectangular hole portion 42 and the first circular hole portion 46 are provided between the first rectangular hole portion 46 and the first circular hole portion 46. Two through holes 60a are formed.

第１矩形孔部４２の周縁部にはロッド本体１６の外方（つまり、第１金属板３４に重ね合わせた第２金属板３６から離れる方向）へ立ち上がる第１筒部分１２ａが形成されている。第１筒部分１２ａには、第１筒部分１２ａの外方に陥没するとともに第２金属板３６との合わせ面へ開口する第１ゴム収容部分３８ａが設けられている。   A first cylindrical portion 12 a that rises outward from the rod body 16 (that is, in a direction away from the second metal plate 36 superimposed on the first metal plate 34) is formed at the peripheral portion of the first rectangular hole portion 42. . The first cylinder portion 12 a is provided with a first rubber accommodating portion 38 a that is recessed outward from the first cylinder portion 12 a and opens to a mating surface with the second metal plate 36.

第１円孔部４６の周縁部には、ロッド本体１６の外方へ立ち上がる第２筒部分１４ａが形成されている。第２筒部分１４ａには、第１円孔部４６の周縁部から先端側に行くほど径方向内方に傾斜するテーパ状の第２ゴム収容部分４０ａが設けられている。   A second cylinder portion 14 a that rises outward from the rod body 16 is formed at the peripheral edge of the first circular hole portion 46. The second cylindrical portion 14a is provided with a tapered second rubber accommodating portion 40a that inclines radially inward from the peripheral edge of the first circular hole portion 46 toward the distal end side.

また、第２金属板３６は、金属板を第１金属板３４と同一形状にプレス成形したものであり、具体的には、その長手方向Ｌの一端部に角を丸めた矩形状の第２矩形孔部４４が、他端部に円形状の第２円孔部４８がそれぞれ穿設されるとともに、第２矩形孔部４４と第２円孔部４８との間に２つの貫通孔６０ｂが穿設されている。   The second metal plate 36 is formed by press-molding a metal plate in the same shape as the first metal plate 34. Specifically, the second metal plate 36 has a rectangular second shape with rounded corners at one end in the longitudinal direction L thereof. The rectangular hole 44 is formed with a circular second circular hole 48 at the other end, and two through holes 60b are provided between the second rectangular hole 44 and the second circular hole 48. It has been drilled.

第２矩形孔部４４の周縁部にはロッド本体１６の外方（つまり、第２金属板３６に重ね合わせた第１金属板３４から離れる方向）へ立ち上がる第１筒部分１２ｂが形成されている。第１筒部分１２ｂには、第１筒部分１２ａの外方に陥没するとともに第１金属板３４との合わせ面へ開口する第１ゴム収容部分３８ｂが設けられている。   A first cylindrical portion 12b that rises outward from the rod body 16 (that is, in a direction away from the first metal plate 34 superimposed on the second metal plate 36) is formed at the peripheral edge of the second rectangular hole 44. . The first tube portion 12b is provided with a first rubber housing portion 38b that is recessed outward from the first tube portion 12a and opens to a mating surface with the first metal plate 34.

第２円孔部４８の周縁部には、ロッド本体１６の外方へ立ち上がる第２筒部分１４ｂが形成されている。第２筒部分１４ｂには、第２円孔部４８の周縁部から先端側に行くほど径方向内方に傾斜するテーパ状の第２ゴム収容部分４０ｂが設けられている。   A second cylinder portion 14 b that rises outward from the rod body 16 is formed at the peripheral edge of the second circular hole portion 48. The second cylindrical portion 14b is provided with a tapered second rubber accommodating portion 40b that is inclined radially inward from the peripheral edge of the second circular hole portion 48 toward the distal end side.

そして、第１金属板３４と、第１金属板３４に対して中心線Ｃを回転対称軸として表裏反転させて配置した第２金属板３６とを重ね合わせることで、第１ゴム収容部分３８ａと第１ゴム収容部分３８ｂを連結してなる第１ゴム収容部３８を備えた第１筒部１２が第１筒部分１２ａ及び第１筒部分１２ｂから形成されるとともに、第２ゴム収容部分４０ａと第２ゴム収容部分４０ｂを連結してなる第２ゴム収容部４０を備えた第２筒部１４が第２筒部分１４ａ及び第２筒部分１４ｂから形成される。このように重ね合わせた２枚の金属板３４，３６は、第１金属板３４に設けられた複数（本実施形態では４つ）の第１かしめ部５０と、第２金属板３６に設けられた複数（本実施形態では４つ）の第２かしめ部５２によってかしめ固定され、ロッド本体１６を形成する。   The first metal plate 34 and the second metal plate 36 arranged with the center line C being a rotationally symmetric axis with respect to the first metal plate 34 reversed so as to be reversed are arranged to overlap the first rubber containing portion 38a. A first cylindrical portion 12 having a first rubber accommodating portion 38 formed by connecting the first rubber accommodating portions 38b is formed of the first cylindrical portion 12a and the first cylindrical portion 12b, and the second rubber accommodating portion 40a. A second cylindrical portion 14 having a second rubber accommodating portion 40 formed by connecting the second rubber accommodating portions 40b is formed from the second cylindrical portion 14a and the second cylindrical portion 14b. The two metal plates 34 and 36 overlapped in this way are provided on the plurality of (four in this embodiment) first caulking portions 50 provided on the first metal plate 34 and the second metal plate 36. The rod main body 16 is formed by caulking and fixing by a plurality of (four in this embodiment) second caulking portions 52.

以上のように第１金属板３４と第２金属板３６とを重ね合わせて形成されたロッド本体１６には、図１、図３〜図５に示すように、少なくともロッド本体１６の周縁部を除く位置において、好ましくは、第１金属板３４及び第２金属板３６をかしめ固定する第１かしめ部５０及び第２かしめ部５２を除く位置において第１金属板３４と第２金属板３６とが所定の間隔（例えば２〜４ｍｍ）をあけて対向する空隙部７２が形成されている。   As described above, the rod body 16 formed by superposing the first metal plate 34 and the second metal plate 36 has at least a peripheral portion of the rod body 16 as shown in FIGS. 1 and 3 to 5. Preferably, the first metal plate 34 and the second metal plate 36 are located at positions other than the first caulking portion 50 and the second caulking portion 52 for caulking and fixing the first metal plate 34 and the second metal plate 36. The space | gap part 72 which opposes a predetermined space | interval (for example, 2-4 mm) is formed.

なお、本実施形態では、空隙部７２における第１金属板３４と第２金属板３６との間隔と、連通路７０における第１金属板３４と第２金属板３６との間隔とを等しい大きさに設けたが、空隙部７２に比べて連通路７０における第１金属板３４と第２金属板３６との間隔を大きく設けてもよく、一例を挙げると、空隙部７２における間隔が１〜２ｍｍに対して、連通路７０における間隔を３〜４ｍｍに設けてもよい。   In the present embodiment, the gap between the first metal plate 34 and the second metal plate 36 in the gap 72 and the gap between the first metal plate 34 and the second metal plate 36 in the communication path 70 are equal. However, the gap between the first metal plate 34 and the second metal plate 36 in the communication passage 70 may be larger than that of the gap portion 72. For example, the gap in the gap portion 72 is 1 to 2 mm. On the other hand, you may provide the space | interval in the communicating path 70 in 3-4 mm.

以上のように本実施形態の防振連結ロッド１０では、第１筒部１２の内周面から径方向外方へ陥没する第１ゴム収容部３８の底部３９にロッド本体１６の外部へ連通する連通路７０が設けられているため、軸心Ｏ１方向を水平方向に向けて第１内筒２２を車体あるいはエンジンに連結し第１筒部１２の軸心Ｏ１方向を水平方向に配置しても、第１防振ブッシュ１８の第１ゴム状弾性部２４と第１筒部１２の内周面との間に形成された間隙１３から第１筒部１２の内周面へ浸入した水が、第１筒部１２の内部で滞留することなく第１ゴム収容部３８の底部３９から連通路７０を通ってロッド本体１６の外部へ排出される。そのため、第１筒部１２を構成する２枚の金属板３４，３６や第１筒部１２に設けられた第１防振ブッシュ１８の第１ゴム状弾性部２４が長期間水に浸漬されることなく防振連結ロッド１０の劣化を抑えることができる。   As described above, in the vibration-isolating connecting rod 10 of the present embodiment, the bottom 39 of the first rubber housing portion 38 that is recessed radially outward from the inner peripheral surface of the first cylinder portion 12 communicates with the outside of the rod body 16. Since the communication path 70 is provided, the first inner cylinder 22 is connected to the vehicle body or the engine with the axis O1 direction in the horizontal direction and the axis O1 direction of the first cylinder portion 12 is arranged in the horizontal direction. The water that has entered the inner peripheral surface of the first cylindrical portion 12 from the gap 13 formed between the first rubber-like elastic portion 24 of the first vibration-isolating bush 18 and the inner peripheral surface of the first cylindrical portion 12, Without staying inside the first cylindrical portion 12, the first rubber accommodating portion 38 is discharged from the bottom 39 through the communication path 70 to the outside of the rod body 16. Therefore, the two metal plates 34 and 36 constituting the first cylindrical portion 12 and the first rubber-like elastic portion 24 of the first vibration isolating bush 18 provided in the first cylindrical portion 12 are immersed in water for a long period of time. Therefore, it is possible to suppress the deterioration of the vibration-proof connecting rod 10.

また、本実施形態の防振連結ロッド１０では、ロッド本体１６の周縁部を除く位置に第１金属板３４と第２金属板３６とが所定の間隔をあけて対向する空隙部７２が形成されているため、エンジンからの振動が入力されても第１金属板と第２金属板とが擦れ合いにくくなり、異音の発生を抑えることができる。   Further, in the vibration-isolating connecting rod 10 of the present embodiment, a gap portion 72 is formed in which the first metal plate 34 and the second metal plate 36 face each other at a predetermined interval at a position excluding the peripheral portion of the rod body 16. Therefore, even if vibration from the engine is input, the first metal plate and the second metal plate are less likely to rub against each other, and the generation of abnormal noise can be suppressed.

１０…防振連結ロッド
１２…第１筒部
１４…第２筒部
１５…連結部
１６…ロッド本体
１８…第１防振ブッシュ
２０…第２防振ブッシュ
２２…第１内筒
２４…第１ゴム状弾性部
２６…凸部
２８…第２内筒
３０…第２ゴム状弾性部
３２…膨出部
３４…第１金属板
３６…第２金属板
３８…第１ゴム収容部
４０…第２ゴム収容部
５０…第１かしめ部
５２…第２かしめ部
７０…連通路
７２…空隙部
Ｃ…中心線 DESCRIPTION OF SYMBOLS 10 ... Anti-vibration connection rod 12 ... 1st cylinder part 14 ... 2nd cylinder part 15 ... Connection part 16 ... Rod main body 18 ... 1st anti-vibration bush 20 ... 2nd anti-vibration bush 22 ... 1st inner cylinder 24 ... 1st Rubber-like elastic part 26 ... convex part 28 ... second inner cylinder 30 ... second rubber-like elastic part 32 ... bulging part 34 ... first metal plate 36 ... second metal plate 38 ... first rubber housing part 40 ... second Rubber accommodating part 50 ... first caulking part 52 ... second caulking part 70 ... communication path 72 ... gap part C ... center line

Claims (3)

長手方向の一端部に設けられた第１筒部と、長手方向の他端部に設けられた第２筒部と、前記第１筒部と前記第２筒部とを連結するロッド本体と、第１内筒と前記第１内筒の外周部を覆う第１ゴム状弾性部とを備えて前記第１筒部内に設けられた第１防振ブッシュと、第２内筒と第２ゴム状弾性部とを備えて前記第２筒部内に設けられた第２防振ブッシュとを備え、前記ロッド本体が、第１金属板と、前記第１金属板に重ね合わせられた第２金属板とをかしめ固定してなる防振連結ロッドにおいて、
前記第１ゴム状弾性部は、前記第１内筒の外周面から径方向外方に突出する凸部を備え、
前記ロッド本体は、前記第１筒部の内周面が径方向外方に陥没し前記凸部が嵌り込む収容部と、前記第１金属板と前記第２金属板との間に前記収容部と連通し前記ロッド本体の周縁に開口する連通路とを備え、
前記連通路は、前記第１金属板と前記第２金属板とが間隔をあけて対向することで形成されていることを特徴とする防振連結ロッド。 A first cylinder part provided at one end part in the longitudinal direction, a second cylinder part provided at the other end part in the longitudinal direction, a rod body connecting the first cylinder part and the second cylinder part, A first anti-vibration bushing provided in the first cylinder part with a first inner cylinder and a first rubber-like elastic part covering the outer periphery of the first inner cylinder; a second inner cylinder; and a second rubber-like part A second anti-vibration bush provided in the second cylindrical portion with an elastic portion, and the rod body includes a first metal plate and a second metal plate overlaid on the first metal plate; In the anti-vibration connecting rod,
The first rubber-like elastic portion includes a convex portion protruding radially outward from an outer peripheral surface of the first inner cylinder,
The rod main body includes a housing portion between the first metal plate and the second metal plate, and a housing portion in which an inner peripheral surface of the first cylindrical portion is depressed radially outward and the convex portion is fitted. And a communication path that opens to the periphery of the rod body ,
The communication passage, vibration damping connecting rod and the first metal plate and the second metal plate is characterized that you have been formed by opposing an interval. 前記ロッド本体は、周縁部を除く位置に前記第１金属板と前記第２金属板とが間隔をあけて対向する空隙部を備えたことを特徴とする請求項１に記載の防振連結ロッド。   2. The anti-vibration coupling rod according to claim 1, wherein the rod body includes a gap portion where the first metal plate and the second metal plate face each other at a position excluding a peripheral edge portion. . 前記連通路は、前記空隙部に比べて前記第１金属板と前記第２金属板との間隔が大きく設けられたことを特徴とする請求項２に記載の防振連結ロッド。   3. The anti-vibration connecting rod according to claim 2, wherein the communication path is provided with a larger interval between the first metal plate and the second metal plate than the gap portion.

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