JP2006046588A - Stopper member for vibration-proofing bush - Google Patents

Stopper member for vibration-proofing bush Download PDF

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JP2006046588A
JP2006046588A JP2004231093A JP2004231093A JP2006046588A JP 2006046588 A JP2006046588 A JP 2006046588A JP 2004231093 A JP2004231093 A JP 2004231093A JP 2004231093 A JP2004231093 A JP 2004231093A JP 2006046588 A JP2006046588 A JP 2006046588A
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stopper member
vibration
contact surface
mounting bracket
bush
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Japanese (ja)
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Yorikazu Nakamura
順和 中村
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Sumitomo Riko Co Ltd
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Sumitomo Riko Co Ltd
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Priority to JP2004231093A priority Critical patent/JP2006046588A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/41—Elastic mounts, e.g. bushings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/44—Centering or positioning means
    • B60G2204/4402—Spacers or shims

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stopper member for a vibration-proofing bush capable of inhibiting the generation of noise by stick slip on a contact face with a mounting bracket or the like. <P>SOLUTION: This stopper member 27 of the bush 10 is inserted and fitted to an axial right end part side of an inner cylinder fitting 12 and held between the mounting bracket 35 fixed to an axial end part and an end part of an outer cylinder fitting 14 in a compressed state. The contact face with the mounting bracket, of the stopper member 27 is provided with circular arc-shaped linear projections 31 concentrically mounted on several parts in the radial direction and on several parts in the circumferential direction, and groove parts 32 are formed on several parts separated from each other in the circumferential direction in a state of being extended from a center hole in the radial direction to an outer peripheral edge. The embossing work is performed on the contact face 29 provided with the linear projections 31 and the groove parts 32, to form a fine irregular state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、車両のサスペンションにおけるアーム部材等に装着される防振ブッシュの軸方向端部側に取り付けられる防振ブッシュ用ストッパ部材に関する。   The present invention relates to an anti-vibration bushing stopper member attached to an axial end portion of an anti-vibration bush attached to an arm member or the like in a vehicle suspension.

従来、この種の防振ブッシュとしては、例えば特許文献１に示すように、車両側ブラケットに取り付けられる軸部材と、軸部材の周囲に配置された外筒部材との間に筒状のゴム弾性体が介在し、軸部材の軸方向の端部にゴム弾性体製のストッパリングが嵌合されており、ストッパリングが外筒部材端部と車両側ブラケットとの間に圧縮状態で挟まれたものが知られている。この防振ブッシュは、車両側ブラケットにより車体側に固定され、外筒部材に連結筒が圧入固定されたアーム部材によってサスペンション側に固定される。この防振ブッシュには、車両の走行中に、軸方向，軸直角方向，軸回りの回転方向から外力（振動入力）が加わって変位する。そのため、ストッパリングが外力を受けて動くことにより、圧接している車両側ブラケットとの間で急激な摩擦が起こり、その結果、ステックスリツプによる異音が発生し易いという問題があった。   Conventionally, as this type of anti-vibration bushing, for example, as shown in Patent Document 1, a cylindrical rubber elasticity is provided between a shaft member attached to a vehicle side bracket and an outer cylinder member disposed around the shaft member. A rubber elastic stopper ring is fitted to the axial end of the shaft member, and the stopper ring is sandwiched between the outer cylinder member end and the vehicle side bracket in a compressed state. Things are known. This anti-vibration bush is fixed to the vehicle body side by a vehicle side bracket, and is fixed to the suspension side by an arm member in which a connecting cylinder is press-fitted and fixed to the outer cylinder member. The anti-vibration bush is displaced by an external force (vibration input) from the axial direction, the direction perpendicular to the axis, and the rotational direction around the axis while the vehicle is running. Therefore, when the stopper ring receives an external force and moves, abrupt friction occurs with the vehicle-side bracket that is in pressure contact. As a result, there is a problem that abnormal noise due to a stick slip is likely to occur.

これに対して、特許文献１では、ストッパリングをゴム単体で構成すると共にその原料ゴムに滑剤が配合されて表面潤滑部材とするか、あるいはストッパリングの表面に摩擦係数の低い材料からなるコーティング層を形成して表面潤滑部材とし、ストッパリングと車両側ブラケット間の摩擦抵抗を低減することによって、スティクスリップによる異音の発生を抑えようとしている。しかし、ストッパリングが外筒部材端部と車両側ブラケットとの間に圧縮状態で挟まれてブラケットと広い面積で接触するようになっており、両者間の接触抵抗が大きくなっている。そのため、単に上記材料的な対策によりストッパリングと車両側ブラケット間を滑りやすくするのみでは十分に異音の発生を抑える効果が得られなかった。
特開平１１−５１０９９号公報 On the other hand, in Patent Document 1, the stopper ring is formed of a single rubber and a lubricant is blended with the raw rubber to form a surface lubrication member, or a coating layer made of a material having a low friction coefficient on the surface of the stopper ring. The surface lubrication member is formed to reduce the frictional resistance between the stopper ring and the vehicle side bracket, thereby suppressing the generation of abnormal noise due to the stick lip. However, the stopper ring is sandwiched between the end of the outer cylinder member and the vehicle side bracket in a compressed state so as to come into contact with the bracket over a wide area, and the contact resistance between the two is increased. For this reason, simply making the stopper ring and the vehicle side bracket easy to slide by the above-mentioned material countermeasures does not sufficiently suppress the generation of abnormal noise.
JP-A-11-51099

本発明は、上記した問題を解決しようとするもので、取付ブラケット等との接触面でのスティクスリップによる異音の発生を抑えることができる防振ブッシュ用ストッパ部材を提供することを目的とする。   The present invention is intended to solve the above-described problem, and an object of the present invention is to provide a vibration-proof bushing stopper member that can suppress the occurrence of abnormal noise due to sticky slips on the contact surface with a mounting bracket or the like. .

上記目的を達成するために、本発明の構成上の特徴は、内筒金具と、内筒金具を囲んで径方向外方に配置される外筒金具と、内筒金具と外筒金具間を連結するゴム弾性体本体とを備えてなる防振ブッシュの内筒金具の軸方向端部側に、その中心孔にて挿嵌されるゴム弾性体製で環状のストッパ部材であって、軸方向端部に固定される板状の取付ブラケットと外筒金具端部との間に圧縮状態で挟まれる防振ブッシュ用ストッパ部材において、取付ブラケットに当接する当接面の周方向に離間した複数箇所にて中心孔と外周縁間に延設されて当接面から凹んだ溝部と、周方向に隣り合った溝部間にて当接面から突出した複数の円弧形の線状突起とを設けたことにある。   In order to achieve the above object, the structural features of the present invention include an inner cylinder fitting, an outer cylinder fitting that is disposed radially outwardly surrounding the inner cylinder fitting, and an interval between the inner cylinder fitting and the outer cylinder fitting. An annular stopper member made of a rubber elastic body, which is inserted into the axial end portion of the inner cylindrical fitting of the vibration isolating bushing having a rubber elastic body main body to be connected, in the axial direction. In the vibration-proof bushing stopper member that is sandwiched in a compressed state between the plate-shaped mounting bracket fixed to the end and the end of the outer tube fitting, multiple locations spaced in the circumferential direction of the contact surface that contacts the mounting bracket Provided with a groove extending between the central hole and the outer peripheral edge and recessed from the contact surface, and a plurality of arc-shaped linear protrusions protruding from the contact surface between adjacent groove portions in the circumferential direction. That is.

上記のように構成した発明においては、取付ブラケットと当接するストッパ部材の当接面の周方向の複数箇所にて中心孔と外周縁間に延びて当接面から凹んだ溝部を設けたことにより、当接面側が複数の領域に分けられるため、当接面側のバネ定数が柔かくされ、外部からの振動入力によるストッパ部材と取付ブラケット間の相互の変位に対して、ゴム弾性体表面側が変形して追従し易くなる。さらに、ストッパ部材の当接面に、隣り合った各溝部間にて当接面から突出した円弧形の線状突起を設けたことにより、当接面と板状の取付ブラケットとの接触面積が少なくされ、振動入力に対する接触抵抗が小さくされる。すなわち、これら当接面に設けた線状突起と溝部の作用により、外部からの振動入力に対して当接面が変形して追従し易くなると共に振動入力に対して取付ブラケットとの接触抵抗が小さくされる。そのため、外部からの通常の振動入力に対しては、ストッパ部材と取付ブラケット間で滑りが生じ難くなる。さらに、外部からの大きな振動入力に対しては、上記線状突起と溝部の作用を合わせた相乗作用により、ストッパ部材の当接面と取付ブラケット間においてスティクスリップのような急激な滑りが緩和されてスムーズな滑りとなる。その結果、本発明においては、外部からの振動入力に対して、スティックスリップによる異音の発生が有効に抑えられる。   In the invention configured as described above, by providing a groove portion that extends between the central hole and the outer peripheral edge and is recessed from the contact surface at a plurality of locations in the circumferential direction of the contact surface of the stopper member that contacts the mounting bracket. Since the contact surface side is divided into a plurality of areas, the spring constant on the contact surface side is softened, and the rubber elastic body surface side is deformed against mutual displacement between the stopper member and the mounting bracket due to external vibration input It becomes easy to follow. Furthermore, the contact area between the contact surface and the plate-shaped mounting bracket is provided on the contact surface of the stopper member by providing an arc-shaped linear protrusion protruding from the contact surface between adjacent grooves. And contact resistance against vibration input is reduced. That is, due to the action of the linear protrusions and the grooves provided on these contact surfaces, the contact surfaces are easily deformed and follow the vibration input from the outside, and the contact resistance with the mounting bracket against the vibration input is increased. It is made smaller. Therefore, it is difficult for slippage to occur between the stopper member and the mounting bracket with respect to normal vibration input from the outside. Furthermore, for a large external vibration input, a sudden slip such as a stick lip is mitigated between the contact surface of the stopper member and the mounting bracket by a synergistic action that combines the action of the linear protrusion and the groove. And smooth sliding. As a result, in the present invention, the generation of abnormal noise due to stick-slip can be effectively suppressed against external vibration input.

また、上記ストッパ部材の線状突起が、さらに径方向の複数箇所に互いに離間して配設されてもよい。これにより、当接面全面において板状の取付ブラケットとの接触面積が少なくされるため、接触抵抗がさらに小さくなり、そのため上記スティックスリップによる異音の発生を抑制する効果がさらに高められる。   Further, the linear protrusions of the stopper member may be further spaced apart from each other at a plurality of radial positions. As a result, the contact area with the plate-like mounting bracket is reduced over the entire abutting surface, so that the contact resistance is further reduced, and therefore the effect of suppressing the generation of abnormal noise due to the stick slip is further enhanced.

また、上記ストッパ部材は、低摩擦係数の自己潤滑ゴム材料により形成されてもよい。これにより、当接面と取付ブラケットとの摩擦抵抗が小さくされ、両者間の接触抵抗が小さくされるため、上記スティックスリップによる異音の発生を抑制する効果がさらに高められる。   The stopper member may be formed of a self-lubricating rubber material having a low friction coefficient. As a result, the frictional resistance between the contact surface and the mounting bracket is reduced, and the contact resistance between the two is reduced, so that the effect of suppressing the generation of abnormal noise due to the stick slip is further enhanced.

また、上記ストッパ部材の当接面に、微小な凹凸形状であるしぼ加工が施されてもよい。これにより、当接面と取付ブラケットとの接触面積が少なくされるため、両者間の接触抵抗が小さくなり、そのため異音抑制の効果がさらに高められる。   In addition, the contact surface of the stopper member may be subjected to a graining process having a minute uneven shape. As a result, the contact area between the contact surface and the mounting bracket is reduced, so that the contact resistance between the two is reduced, and the effect of suppressing abnormal noise is further enhanced.

本発明によれば、取付ブラケットと当接するストッパ部材の当接面の周方向の複数箇所にて中心孔と外周縁間に延びると共に当接面から凹んだ溝部を設けたことにより、当接面側のバネ定数が柔かくされ、外部からの振動入力に対して、ゴム弾性体表面側が変形して追従し易くなり、さらに当接面の隣り合った各溝部間にて当接面から突出した複数の円弧形の線状突起を設けたことにより、当接面と取付ブラケットとの接触面積が少なくされ、振動入力に対する両者間の接触抵抗が小さくされる。その結果、本発明においては、これら線状突起と溝部の作用を合わせた相乗作用により、振動入力によるストッパ部材と取付ブラケット間の相互の変位に対して、両者間においてはスティクスリップのような急激な滑りが緩和されてスムーズな滑りとなり、そのためスティックスリップによる異音の発生が抑えられ、車両の乗り心地が高められる。さらに、線状突起を径方向の複数箇所に配設したり、ストッパ部材を低摩擦係数の自己潤滑ゴム材料により形成したり、当接面に微小な凹凸形状であるしぼ加工を施したりすることにより、異音抑制効果がさらに高められる。   According to the present invention, the contact surface is provided by providing grooves extending between the center hole and the outer peripheral edge and recessed from the contact surface at a plurality of locations in the circumferential direction of the contact surface of the stopper member that contacts the mounting bracket. The spring constant on the side is soft, the rubber elastic body surface side is easily deformed to follow external vibration input, and a plurality of protrusions projecting from the contact surface between adjacent groove portions of the contact surface By providing the arc-shaped linear protrusion, the contact area between the contact surface and the mounting bracket is reduced, and the contact resistance between the two with respect to the vibration input is reduced. As a result, in the present invention, due to the synergistic action of the combined action of the linear protrusions and the groove portions, the mutual displacement between the stopper member and the mounting bracket due to vibration input is abruptly similar to a stick lip between the two. The smooth slip is alleviated and the generation of noise due to stick slip is suppressed, and the ride comfort of the vehicle is enhanced. Furthermore, linear protrusions are arranged at multiple locations in the radial direction, the stopper member is formed of a self-lubricating rubber material with a low coefficient of friction, or the contact surface is subjected to a concavo-convex shape with minute irregularities. Thereby, the noise suppression effect is further enhanced.

以下、本発明の一実施例を図面を用いて説明する。図１は、実施例である車両のサスペンションの中間ビームから延びた左右のアーム部材と車体側への取付ブラケット間に組み付けられる防振ブッシュであるストッパ部材を装着したトーコレクトブッシュ１０（以下、ブッシュと記す）の組付け状態の要部を平面断面図により示したものである。図２から図４は、ブッシュ本体１１を平面断面図及び左右側面により示し、図５はストッパ部材２７を右側面図、断面図及び左側面図により示した。図６は、ブッシュの車両への組み付け状態を平面図により示したものである。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a to-collect bush 10 (hereinafter referred to as a bush) equipped with a stopper member which is an anti-vibration bush assembled between left and right arm members extending from an intermediate beam of a vehicle suspension according to an embodiment and a mounting bracket on a vehicle body side. The main part in the assembled state is indicated by a plan sectional view. 2 to 4 show the bush body 11 in a plan sectional view and left and right side views, and FIG. 5 shows the stopper member 27 in a right side view, a sectional view, and a left side view. FIG. 6 is a plan view showing an assembled state of the bush to the vehicle.

ブッシュ１０は、ストレートな円筒形で厚肉の内筒金具１２と、内筒金具１２を囲んで径方向外方に配置された外筒金具１４と、内外筒金具１２，１４間を連結するゴム弾性体本体２１とを備えたブッシュ本体１１と、内筒金具１２の軸方向右端部側に挿嵌されて軸方向端部に固定された車体側部材６に取り付けられる板状の取付ブラケット３５と外筒金具１４端部間に圧縮状態で挟まれたゴム弾性体製の円環状板であるストッパ部材２７とを備えている。なお、以下の説明において、ブッシュ１０の各部の前後，左右及び上下関係については車両への装着状態での位置関係となっており、図１に示す上下、左右及び紙面の前後に対応している。   The bush 10 is a straight cylindrical and thick inner cylinder fitting 12, an outer cylinder fitting 14 that is disposed radially outwardly surrounding the inner cylinder fitting 12, and a rubber that connects the inner and outer cylinder fittings 12 and 14. A bushing body 11 having an elastic body 21, a plate-like mounting bracket 35 that is fitted to the vehicle body side member 6 that is inserted into and fixed to the axial end of the inner cylinder 12 And a stopper member 27, which is an annular plate made of a rubber elastic body, sandwiched in a compressed state between the end portions of the outer cylinder fitting 14. In the following description, the front / rear, left / right, and top / bottom relations of the respective parts of the bush 10 are positional relations when mounted on the vehicle, and correspond to the top / bottom, left / right, and front / back of the paper surface shown in FIG. .

外筒金具１４は、薄肉の円筒形の金具であり、円筒部分の軸方向左端に径方向外方に延出した環状の外フランジ部１５を一体で設けている。外筒金具１４は、薄肉の金属パイプの左端側に絞り加工を施すことにより外フランジ部１５が一体で形成される。外フランジ部１５は、図４に示すように、前後方向に長く上下方向（図示左右方向）に短い略長方形状で前側で両角部が斜めに切り欠かれた傾斜部１５ａになっており、後側で両角部が略傾斜状に切り欠かれた凹み部１５ｂになっている。また、前後方向で外筒金具１４外周縁から延びた部分が略長方形で軸方向左端側にわずかに凹んだ凹み部１５ｃになっている。外筒金具１４は、軸方向長さが内筒金具１２の軸方向長さより短く、内筒金具１２の軸方向右端側寄り位置に配置されている。そのため、外フランジ部１５と内筒金具１２の左端との軸方向間が所定の大きな左スペースになっており、外筒金具１４の軸方向右端と内筒金具１２右端との軸方向間が左スペースより小さい右スペースになっている。   The outer cylinder fitting 14 is a thin cylindrical fitting, and is integrally provided with an annular outer flange portion 15 extending radially outward at the left end in the axial direction of the cylindrical portion. The outer cylinder 14 is integrally formed with an outer flange portion 15 by drawing the left end of a thin metal pipe. As shown in FIG. 4, the outer flange portion 15 is a substantially rectangular shape that is long in the front-rear direction and short in the up-down direction (the left-right direction in the figure), and has an inclined portion 15a with both corners cut obliquely on the front side. On the side, both corners are dents 15b cut out in a substantially inclined shape. Further, a portion extending from the outer peripheral edge of the outer cylindrical metal member 14 in the front-rear direction is a substantially rectangular shape, and is a recessed portion 15c that is slightly recessed toward the left end in the axial direction. The outer cylinder fitting 14 has an axial length shorter than the axial length of the inner cylinder fitting 12 and is disposed at a position closer to the right end side in the axial direction of the inner cylinder fitting 12. Therefore, a predetermined large left space is formed between the axial direction between the outer flange portion 15 and the left end of the inner cylinder fitting 12, and a gap between the axial direction between the axial right end of the outer cylinder fitting 14 and the right end of the inner cylinder fitting 12 is left. The right space is smaller than the space.

ゴム弾性体本体２１は、内筒金具１２と外筒金具１４との間に加硫成形により形成されて、内外筒金具１２，１４間を弾性的に連結している。また、外筒金具１４のフランジ部１５の軸方向左側の上記左スペースには、内筒金具１２外周面と外フランジ部１５左側面に接着されて内筒金具１２の軸方向略左端に至る環状のストッパゴム部２２が、ゴム弾性体本体２１から延長して一体で形成されている。ストッパゴム部２２は、図２に示すように、軸方向に肉厚の厚肉部２２ａと、厚肉部２２ａと軸方向に空間部２２ｂを隔てて左端に配置されると共に前後先端で厚肉部２２ａと連結された薄肉部２２ｃとにより構成されている。厚肉部２２ａの軸方向中間位置には、外フランジ部１５と略同一形状の円環板である補強板１７が同軸状に埋設されており、ゴムストッパ部２２の硬さが高められている。また、ストッパゴム部２２の外形は、図３に示すように、中心を挟んで前側が外フランジ部１５と略同一形状であると共に中心近傍で左右幅が傾斜状に狭められており、中心を挟んだ後側が外フランジ部１５よりわずかに幅の狭い略長方形状にされている。   The rubber elastic body 21 is formed by vulcanization molding between the inner cylinder fitting 12 and the outer cylinder fitting 14 and elastically connects the inner and outer cylinder fittings 12, 14. Further, in the left space on the left side in the axial direction of the flange portion 15 of the outer cylinder fitting 14, an annular shape which is bonded to the outer peripheral surface of the inner cylinder fitting 12 and the left side surface of the outer flange portion 15 and reaches the substantially left end in the axial direction of the inner cylinder fitting 12. The stopper rubber portion 22 is integrally formed extending from the rubber elastic body 21. As shown in FIG. 2, the stopper rubber portion 22 is disposed on the left end with a thick portion 22a in the axial direction and a space portion 22b in the axial direction with the thick portion 22a and is thick at the front and rear ends. It is comprised by the thin part 22c connected with the part 22a. A reinforcing plate 17, which is an annular plate having substantially the same shape as the outer flange portion 15, is embedded coaxially at an axially intermediate position of the thick portion 22 a, and the hardness of the rubber stopper portion 22 is increased. . Further, as shown in FIG. 3, the outer shape of the stopper rubber portion 22 is substantially the same shape as the outer flange portion 15 with the center interposed therebetween, and the lateral width is narrowed in the vicinity of the center in an inclined manner. The rear side is a substantially rectangular shape that is slightly narrower than the outer flange portion 15.

ゴム弾性体本体２１及びストッパゴム部２２には、図４に示すように、ゴム弾性体本体２１の右端側において、前後及び上下位置から軸方向に沿ってストッパゴム部２２の厚肉部２２ａ左端近傍まで延びた空間部であるそれぞれ軸心を挟んだ各一対の前後すぐり部２４と上下すぐり部２５が設けられている。各一対の前後すぐり部２４と上下すぐり部２５は、それぞれ軸心を挟んで対称形状になっている。前後すぐり部２４は径方向外周縁から内周縁に延びた略Ｕ字状になっており、ゴム弾性体本体２１の前後方向のバネ定数が小さくなるようにされている。また、上下すぐり部２５は前後方向に長い長円形になっており、ゴム弾性体本体２１の上下方向のバネ定数が小さくなるようにされている。   As shown in FIG. 4, the rubber elastic body 21 and the stopper rubber portion 22 include a left end of the thick portion 22 a of the stopper rubber portion 22 along the axial direction from the front and rear and vertical positions on the right end side of the rubber elastic body 21. A pair of front and rear straight portions 24 and a vertical straight portion 25 sandwiching the respective axial centers, which are space portions extending to the vicinity, are provided. Each of the pair of front and rear curb portions 24 and the upper and lower curb portions 25 has a symmetrical shape with respect to the axis. The front / rear curling portion 24 has a substantially U shape extending from the outer peripheral edge in the radial direction to the inner peripheral edge, and the spring constant in the front / rear direction of the rubber elastic body 21 is reduced. Further, the vertical picking portion 25 is an oval long in the front-rear direction, and the spring constant in the vertical direction of the rubber elastic body 21 is reduced.

ストッパ部材２７は、図５−１〜３に示すように、円形の厚板であり、ゴムに不飽和脂肪酸アミドを含有した摩擦係数の低いゴム材料であるいわゆる自己潤滑ゴムで形成されている。ストッパ部材２７は、中心に内筒金具１２の外径と略同一の内径の中心孔２７ａを設けており、中心孔２７ａには周方向の等間隔な複数箇所にて軸心に向けてわずかに突出した突起部２７ｂを設けており、さらに一方の表面２８（図示左表面）側の中心孔２７ａ周囲には、軸方向にわずかに凹んだ凹部２８ａを設けている。突起部２７ｂは、ストッパ部材２７を内筒金具１２に挿嵌したときに内筒金具１２から抜け難くするためであり、凹部２８ａはストッパ部材２７を内筒金具１２に挿嵌した際にゴム弾性体本体２１端部との当接を避けるために設けられている。   As shown in FIGS. 5-1 to 3, the stopper member 27 is a circular thick plate, and is formed of a so-called self-lubricating rubber, which is a rubber material containing an unsaturated fatty acid amide in rubber and having a low friction coefficient. The stopper member 27 is provided with a central hole 27a having an inner diameter substantially the same as the outer diameter of the inner cylindrical metal member 12 at the center, and the central hole 27a is slightly directed toward the shaft center at a plurality of circumferentially spaced intervals. A protruding protrusion 27b is provided, and a recess 28a slightly recessed in the axial direction is provided around the center hole 27a on the one surface 28 (left surface in the drawing) side. The protrusion 27b is used to make it difficult for the stopper member 27 to be removed from the inner cylinder fitting 12 when the stopper member 27 is inserted into the inner cylinder fitting 12, and the recess 28a is rubber elastic when the stopper member 27 is inserted into the inner cylinder fitting 12. It is provided to avoid contact with the end of the body body 21.

ストッパ部材２７の他方の表面（図示右表面）である取付ブラケット３５との当接面２９には、円弧状の線状突起３１が、同心円状に径方向に略等間隔な３箇所においてかつ周方向の８箇所に設けられている。また、当接面２９には、周方向に４５°離れた８箇所において線状の溝部３２が径方向に中心孔２７ａから外周縁まで延びて設けられている。各線状突起３１は、溝部３２によって分離された形になっており、その中心角が略４５°になっている。本実施例においては、線状突起３１は、その高さ及び幅がそれぞれ１ｍｍになっている。また、溝部３２の深さは、ストッパ部材２７の厚さの１１％程度になっているが、１０〜１５％の範囲であることが望ましい。１０％より小さくなると、ストッパ部材２７に加えられた外力に対してゴム材料の変形が妨げられるおそれがあり、また１５％より大きいと、ストッパ部材２７の軸方向のバネ定数が低くなりすぎるおそれがある。さらに、線状突起３１と溝部３２が形成された上記当接面２９には、しぼ加工といわれる表面処理により微小な凹凸３３が形成されている。なお、線状突起３１と溝部３２の当接面２９への配置については、実施例に限らず任意に配置することが可能である。   On the contact surface 29 with the mounting bracket 35, which is the other surface (the right surface in the figure) of the stopper member 27, arc-shaped linear protrusions 31 are concentrically arranged at three locations at substantially equal intervals in the radial direction. It is provided at eight locations in the direction. The contact surface 29 is provided with linear groove portions 32 extending in the radial direction from the center hole 27a to the outer peripheral edge at eight locations separated by 45 ° in the circumferential direction. Each linear protrusion 31 has a shape separated by the groove 32, and its central angle is approximately 45 °. In this embodiment, the linear protrusion 31 has a height and a width of 1 mm. Moreover, although the depth of the groove part 32 is about 11% of the thickness of the stopper member 27, it is desirable to be in the range of 10 to 15%. If it is less than 10%, the deformation of the rubber material may be hindered by an external force applied to the stopper member 27. If it is more than 15%, the spring constant in the axial direction of the stopper member 27 may be too low. is there. Furthermore, minute irregularities 33 are formed on the contact surface 29 on which the linear protrusions 31 and the groove portions 32 are formed by a surface treatment called squeezing. In addition, about the arrangement | positioning to the contact surface 29 of the linear protrusion 31 and the groove part 32, it is possible to arrange | position arbitrarily not only in an Example.

上記のように形成されたブッシュ１０の車両への組付けについて、図１，図６により説明する。一対のブッシュ本体１１が、車両の両輪１を支持するサスペンション機構の左右にてその左端（ストッパゴム部側の端）を内側にしてそれぞれ配置され、ブッシュ本体１１の外筒金具１４に、サスペンション機構の中間ビーム２の両端から突出したアーム部材３先端の環状のアームアイ４を圧入することによって、中間ビーム２側に固定される。外筒金具１４とアームアイ４の外端部は面一になるように揃えられている。その後、ブッシュ本体１１の右端側の上記右スペースに、ストッパ部材２７が当接面２９を外側にして内筒金具１２に挿嵌される。これにより、ストッパ部材２７の一方の表面２８がアームアイ４及び外筒金具１４の外端面に当接するようになる。なお、本実施例では、外筒金具１４とアーム部材４が重ね合わされて両者一体となって外筒金具として機能しているが、外筒金具１４とアーム部材４の両者を一体で成形し、ゴム弾性体本体２１に圧入する単一の外筒金具とすることも可能である。   The assembly of the bush 10 formed as described above to the vehicle will be described with reference to FIGS. A pair of bush bodies 11 are respectively arranged on the left and right sides of the suspension mechanism that supports both wheels 1 of the vehicle with the left ends (ends on the stopper rubber part side) inside, and the suspension mechanism is attached to the outer cylinder fitting 14 of the bush body 11. By fixing the annular arm eye 4 at the tip of the arm member 3 projecting from both ends of the intermediate beam 2, the intermediate beam 2 is fixed to the intermediate beam 2 side. The outer end fitting 14 and the outer end of the arm eye 4 are aligned to be flush with each other. Thereafter, the stopper member 27 is inserted into the inner cylinder fitting 12 in the right space on the right end side of the bush main body 11 with the contact surface 29 facing outside. As a result, the one surface 28 of the stopper member 27 comes into contact with the arm eye 4 and the outer end surface of the outer cylinder fitting 14. In this embodiment, the outer cylinder fitting 14 and the arm member 4 are overlapped and integrated to function as the outer cylinder fitting, but both the outer cylinder fitting 14 and the arm member 4 are integrally formed, It is also possible to use a single outer cylinder fitting that is press-fitted into the rubber elastic body 21.

つぎに、Ｕ字状の取付ブラケット３５が、内筒金具１２の軸方向両端面に固定される。取付ブラケット３５は、内筒金具１２の軸方向長さと同一間隔で対向した長方形の一対の対向板３６と、その一側縁間を連結する連結板３７とにより一体で構成されており、両対向板３６の中心位置には内筒金具１２の軸孔１２ａと同一内径の取付孔３６ａが設けられている。取付ブラケット３５は、一対の対向板３６で内筒金具１２の両端面を挟み、対向板３６に設けた取付孔３６ａを内筒金具１２の軸孔１２ａに合わせて配置され、ボルト３８を取付孔３６ａび軸孔１２ａに挿通させて先端ネジ部にナット３９を螺着して締め付けることにより、内筒金具１２に固定される。このとき、ストッパ部材２７は、取付ブラケット３５からの押圧力を受けてアームアイ４及び外筒金具１４の端面との間に挟まれて圧縮状態にされる。この状態で、取付ブラケット３５が車体側部材６に溶接によって固定されることにより、図６に示すように、左右一対のストッパ部材２７を含むブッシュ１０がサスペンション側と車体側間に組付けられる。   Next, the U-shaped mounting bracket 35 is fixed to both end surfaces in the axial direction of the inner cylinder fitting 12. The mounting bracket 35 is integrally formed by a pair of rectangular opposing plates 36 that face each other at the same interval as the axial length of the inner cylindrical metal member 12 and a connecting plate 37 that connects the side edges thereof. A mounting hole 36 a having the same inner diameter as the shaft hole 12 a of the inner cylinder 12 is provided at the center position of the plate 36. The mounting bracket 35 sandwiches both end surfaces of the inner cylinder fitting 12 with a pair of opposing plates 36, is arranged with the mounting holes 36a provided in the opposing plate 36 aligned with the shaft holes 12a of the inner cylinder fitting 12, and the bolts 38 are attached to the attachment holes. The nut 39 is inserted into the shaft hole 12a and tightened by screwing the nut 39 to the tip screw portion, thereby being fixed to the inner cylinder fitting 12. At this time, the stopper member 27 receives a pressing force from the mounting bracket 35 and is sandwiched between the arm eye 4 and the end surface of the outer cylinder fitting 14 to be in a compressed state. In this state, the mounting bracket 35 is fixed to the vehicle body side member 6 by welding, whereby the bush 10 including the pair of left and right stopper members 27 is assembled between the suspension side and the vehicle body side as shown in FIG.

上記のように構成した実施例においては、取付ブラケット３５と当接するストッパ部材２７の当接面２９に、その周方向の複数箇所にて径方向に中心孔２７ａと外周縁を結んで延びると共に当接面２９から凹んだ溝部３２を設けたことにより、当接面２９側が複数の領域に分けられる。そのため、当接面２９側のバネ定数が柔かくされ、車輪１側からの振動入力によるストッパ部材２７と取付ブラケット３５間の相互の変位に対して、ゴム弾性体表面側が変形して追従し易くなる。さらに、ストッパ部材２７の当接面２９に、隣り合った各溝部３２間にて当接面２９から突出した円弧形の線状突起３１を設けたことにより、当接面２９と取付ブラケット３５との接触面積が少なくされ振動入力に対する両者間の接触抵抗が小さくされる。   In the embodiment configured as described above, the contact hole 29 of the stopper member 27 that is in contact with the mounting bracket 35 is extended at a plurality of locations in the circumferential direction by connecting the center hole 27a and the outer peripheral edge in the radial direction. By providing the groove 32 that is recessed from the contact surface 29, the contact surface 29 side is divided into a plurality of regions. Therefore, the spring constant on the contact surface 29 side is softened, and the surface of the rubber elastic body is easily deformed to follow the mutual displacement between the stopper member 27 and the mounting bracket 35 due to vibration input from the wheel 1 side. . Further, by providing the contact surface 29 of the stopper member 27 with arcuate linear protrusions 31 protruding from the contact surface 29 between the adjacent grooves 32, the contact surface 29 and the mounting bracket 35 are provided. And the contact resistance between the two with respect to vibration input is reduced.

このように、当接面２９に設けた線状突起３１と溝部３２の作用を合わせた相乗作用により、車輪１側からの振動入力に対して当接面２９が変形し易くなると共に、振動入力に対して取付ブラケット３５との接触抵抗が小さくされる。そのため、車輪１側からの通常の振動入力に対しては、ストッパ部材２７と取付ブラケット３５間で滑りが生じ難くなる。さらに、障害物への衝突等による車輪１側からの大きな振動入力に対しては、上記線状突起３１と溝部３２の作用を合わせた相乗作用により、ストッパ部材２７と取付ブラケット３５間の相互の変位に対して、両者間においてはスティクスリップのような急激な滑りが緩和されてスムーズな滑りとなる。その結果、本実施例においては、大きな振動入力に対して、スティックスリップによる異音の発生が有効に抑えられる。 As described above, the combined action of the linear protrusion 31 and the groove 32 provided on the contact surface 29 makes it easier for the contact surface 29 to be deformed with respect to vibration input from the wheel 1 side. In contrast, the contact resistance with the mounting bracket 35 is reduced. Therefore, it is difficult for slippage to occur between the stopper member 27 and the mounting bracket 35 with respect to normal vibration input from the wheel 1 side. Further, for a large vibration input from the wheel 1 side due to a collision with an obstacle or the like, mutual action between the stopper member 27 and the mounting bracket 35 is caused by a synergistic action combining the actions of the linear protrusion 31 and the groove 32. With respect to the displacement, a sudden slip such as a stick slip is eased between the two, resulting in a smooth slip. As a result, in this embodiment, the generation of abnormal noise due to stick-slip can be effectively suppressed with respect to a large vibration input.

また、当接面２９にしぼ加工が施されていることにより、取付ブラケット３５との接触面積が少なくされるため、両者間の接触抵抗が小さくされており、さらにストッパ部材２７が、摩擦抵抗の小さい自己潤滑ゴムで形成されていることにより、当接面２９と取付ブラケット３５との摩擦抵抗が小さくされ、両者間の接触抵抗がさらに小さくされる。そのため、上記異音抑制の効果がさらに高められる。その結果、本実施例においては、車室内への異音の伝播が抑えられて、車両の乗り心地が高められる。   Moreover, since the contact area with the mounting bracket 35 is reduced because the contact surface 29 has been subjected to the boring process, the contact resistance between the two is reduced, and the stopper member 27 has a frictional resistance. By being formed of a small self-lubricating rubber, the frictional resistance between the contact surface 29 and the mounting bracket 35 is reduced, and the contact resistance between them is further reduced. Therefore, the effect of suppressing the abnormal noise is further enhanced. As a result, in this embodiment, the propagation of abnormal noise into the passenger compartment is suppressed, and the riding comfort of the vehicle is enhanced.

なお、上記実施例では、ストッパ部材２７の取付ブラケットとの当接面２９のみに線状突起３１及び溝部３２を設けると共にしぼ加工が施されているが、これに加えて反対側の外筒金具１４及びアームアイ４と当接する一方の表面２８にもこれらを同様に設けることができる。これにより、ストッパ部材２７の一表面側２８での異音の発生も抑えることができる。ただし、しぼ加工については必要に応じて省くことも可能であり、また、ゴム材料についても、自己潤滑ゴムに代えて通常のゴム材料を用いることも可能である。また、上記実施例において、ストッパ部材２７の溝部３２の外端側のみを埋めて平坦にすることができる。これにより、溝部へのごみ等の進入を防止でき、ストッパ部材の長期にわたっての信頼性を確保できる。   In the above embodiment, the linear protrusion 31 and the groove 32 are provided only on the contact surface 29 of the stopper member 27 with the mounting bracket, and the crimping process is performed. 14 and one surface 28 that abuts the arm eye 4 can be provided in the same manner. Thereby, generation | occurrence | production of the noise in the one surface side 28 of the stopper member 27 can also be suppressed. However, the graining can be omitted as necessary, and the rubber material can also be a normal rubber material instead of the self-lubricating rubber. Moreover, in the said Example, only the outer end side of the groove part 32 of the stopper member 27 can be filled and made flat. Thereby, the entry of dust or the like into the groove can be prevented, and the reliability of the stopper member over a long period can be ensured.

なお、上記実施例において、ブッシュの軸方向一端にのみストッパ部材を設ける構造になっているが、ブッシュの両端にストッパ部材を設ける構造に対しても、本発明を同様に適用することができる。また、上記実施例では、ストッパ部材をトーコレクトブッシュに適用した例について説明しているが、これに限らず、同様の振動を受ける防振ブッシュに適用するストッパ部材に対しても本発明を同様に適用することができる。その他、上記実施例に示したブッシュ及びストッパ部材については一例であり、本発明の主旨を逸脱しない範囲で、種々変更して実施することが可能である。   In the above embodiment, the stopper member is provided only at one end in the axial direction of the bush. However, the present invention can be similarly applied to a structure in which the stopper member is provided at both ends of the bush. Moreover, although the said Example demonstrated the example which applied the stopper member to the toe collect bush, not only this but the present invention is similarly applied also to the stopper member applied to the vibration isolating bush which receives the same vibration. Can be applied to. In addition, the bush and the stopper member shown in the above embodiment are merely examples, and various modifications can be made without departing from the spirit of the present invention.

本発明においては、ストッパ部材の取付ブラケットとの当接面に、周方向の複数箇所にて中心孔と外周縁間に延設されると共に当接面から凹んだ溝部と、当接面から突出した円弧形の線状突起を設けたことにより、ストッパ部材と取付ブラケット間の滑りが生じ難くなり、かつ滑りが生じたときでも接触抵抗が小さくなっていることにより、振動入力に対してストッパ部材と取付ブラケット間でのスティクスリップによる異音の発生が抑えられるので、有用である。   In the present invention, on the contact surface of the stopper member with the mounting bracket, a groove extending between the center hole and the outer peripheral edge at a plurality of locations in the circumferential direction and recessed from the contact surface, and protruding from the contact surface By providing the arc-shaped linear protrusions, slipping between the stopper member and the mounting bracket is difficult to occur, and even when slipping occurs, the contact resistance is reduced, so that the stopper against vibration input This is useful because the generation of noise due to sticky slip between the member and the mounting bracket is suppressed.

本発明の実施例であるトーコレクトブッシュの車両への組付け状態の要部を示す平面断面図である。It is a plane sectional view showing the important section of the state where the toe collect bush which is an example of the present invention is attached to the vehicle. 同トーコレクトブッシュを示す図３のＩＩ−ＩＩ線方向の平面断面図である。It is a plane sectional view of the II-II line direction of Drawing 3 showing the toe collect bush. 同トーコレクトブッシュを示す左側面図である。It is a left view which shows the same to-collect bush. 同トーコレクトブッシュを示す右側面図である。It is a right view which shows the to-collect bush. ストッパ部材を示す右側面図である。It is a right view which shows a stopper member. ストッパ部材を示すＶ−Ｖ線方向の断面図である。It is sectional drawing of the VV line direction which shows a stopper member. ストッパ部材を示す左側面図である。It is a left view which shows a stopper member. トーコレクトブッシュを車両のサスペンションの両アーム部材と車体側への組付け状態を概略的に示す平面図である。It is a top view which shows roughly the assembly | attachment state to the both arm members of the suspension of a vehicle, and the vehicle body side of a to-collect bush.

符号の説明Explanation of symbols

１０…トーコレクトブッシュ、１１…ブッシュ本体、１２…内筒金具、１４…外筒金具、１５…外フランジ部、２１…ゴム弾性体本体、２２…ストッパゴム部、２７…ストッパ部材、２９…当接面、３１…線状突起、３２…溝部、３３…凹凸、３５…取付ブラケット。 DESCRIPTION OF SYMBOLS 10 ... To collect bush, 11 ... Bush main body, 12 ... Inner cylinder metal fitting, 14 ... Outer cylinder metal fitting, 15 ... Outer flange part, 21 ... Rubber elastic body, 22 ... Stopper rubber part, 27 ... Stopper member, 29 ... Contact surface, 31 ... linear protrusion, 32 ... groove part, 33 ... unevenness, 35 ... mounting bracket.

Claims (4)

内筒金具と、該内筒金具を囲んで径方向外方に配置される外筒金具と、該内筒金具と外筒金具間を連結するゴム弾性体本体とを備えてなる防振ブッシュの前記内筒金具の軸方向端部側に、その中心孔にて挿嵌されるゴム弾性体製で環状のストッパ部材であって、該軸方向端部に固定される板状の取付ブラケットと前記外筒金具端部との間に圧縮状態で挟まれる防振ブッシュ用ストッパ部材において、
前記取付ブラケットに当接する当接面の周方向に離間した複数箇所にて中心孔と外周縁間に延設されて該当接面から凹んだ溝部と、周方向に隣り合った該溝部間にて該当接面から突出した複数の円弧形の線状突起とを設けたことを特徴とする防振ブッシュ用ストッパ部材。 An anti-vibration bush comprising: an inner cylinder bracket; an outer cylinder bracket that is disposed radially outwardly surrounding the inner cylinder bracket; and a rubber elastic body body that connects the inner cylinder bracket and the outer cylinder bracket. An annular stopper member made of a rubber elastic body that is fitted into the axial end portion of the inner cylindrical metal fitting at its center hole, and a plate-shaped mounting bracket that is fixed to the axial end portion; In the stopper member for anti-vibration bushing that is sandwiched between the end of the outer tube bracket in a compressed state,
Between a groove portion extending between the center hole and the outer peripheral edge at a plurality of locations spaced in the circumferential direction of the contact surface contacting the mounting bracket and recessed from the corresponding contact surface, and the groove portion adjacent in the circumferential direction. A vibration-proof bushing stopper member comprising a plurality of arc-shaped linear protrusions protruding from the contact surface. 前記線状突起が、さらに径方向の複数箇所に互いに離間して配設されたことを特徴とする前記請求項１に記載の防振ブッシュ用ストッパ部材。 2. The vibration-proof bushing stopper member according to claim 1, wherein the linear protrusions are further spaced apart from each other at a plurality of radial positions. 低摩擦係数の自己潤滑ゴム材料により形成されたことを特徴とする前記請求項１又は２に記載の防振ブッシュ用ストッパ部材。 3. The vibration-proof bushing stopper member according to claim 1, wherein the stopper member is made of a self-lubricating rubber material having a low friction coefficient. 前記当接面には微小な凹凸形状であるしぼ加工が施されていることを特徴とする前記請求項１から３のいずれか１項に記載の防振ブッシュ用ストッパ部材。 The vibration-proof bushing stopper member according to any one of claims 1 to 3, wherein the contact surface is subjected to a graining process having a minute uneven shape.
JP2004231093A 2004-08-06 2004-08-06 Stopper member for vibration-proofing bush Pending JP2006046588A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009058056A (en) * 2007-08-31 2009-03-19 Kurashiki Kako Co Ltd Cylindrical member for vibration-proof device, and vibration-proof device
JP2010281410A (en) * 2009-06-05 2010-12-16 Bridgestone Corp Buffer elastic plate
US8517404B2 (en) 2010-09-29 2013-08-27 Tokai Rubber Industries, Ltd. Toe correct bush
KR20180065643A (en) * 2016-12-08 2018-06-18 현대자동차주식회사 Mounting assembly of coupled torsion beam axle
US11179990B2 (en) 2020-02-28 2021-11-23 Honda Motor Co., Ltd. Bushing collar assembly
CN115045911A (en) * 2022-06-17 2022-09-13 东风柳州汽车有限公司 Rubber bearing for automobile chassis

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009058056A (en) * 2007-08-31 2009-03-19 Kurashiki Kako Co Ltd Cylindrical member for vibration-proof device, and vibration-proof device
JP2010281410A (en) * 2009-06-05 2010-12-16 Bridgestone Corp Buffer elastic plate
US8517404B2 (en) 2010-09-29 2013-08-27 Tokai Rubber Industries, Ltd. Toe correct bush
KR20180065643A (en) * 2016-12-08 2018-06-18 현대자동차주식회사 Mounting assembly of coupled torsion beam axle
KR102417404B1 (en) 2016-12-08 2022-07-06 현대자동차주식회사 Mounting assembly of coupled torsion beam axle
US11179990B2 (en) 2020-02-28 2021-11-23 Honda Motor Co., Ltd. Bushing collar assembly
CN115045911A (en) * 2022-06-17 2022-09-13 东风柳州汽车有限公司 Rubber bearing for automobile chassis

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