JP4066267B2 - Rubber bush - Google Patents

Rubber bush Download PDF

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JP4066267B2
JP4066267B2 JP2005028278A JP2005028278A JP4066267B2 JP 4066267 B2 JP4066267 B2 JP 4066267B2 JP 2005028278 A JP2005028278 A JP 2005028278A JP 2005028278 A JP2005028278 A JP 2005028278A JP 4066267 B2 JP4066267 B2 JP 4066267B2
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inner cylinder
cylinder
rubber
diameter
elastic body
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明彦 加藤
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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、例えば自動車のフロント側のロアリンクに設置されるゴムブッシュに関するものである。   The present invention relates to a rubber bush installed on, for example, a lower link on the front side of an automobile.

一般に、この種のゴムブッシュは、自動車ボディ側のブラケットに連結される内筒と、その周囲に配置されたロアリンク側の外筒と、内筒と外筒との間に介在するゴム状弾性体とを備えている。このゴムブッシュには、通常、耐久性を向上させるため、外筒を縮径する方向に絞り加工を施し、内外筒間に介在されるゴム状弾性体に予備圧縮が与えられている。さらに、特許文献1は、外筒101の絞り加工の代わりに、あるいはこれと併用して、内筒102を拡径することでゴム状弾性体103に予備圧縮を与えるようにしたゴムブッシュを開示している。   In general, this type of rubber bush is composed of an inner cylinder connected to a bracket on the automobile body side, an outer cylinder on the lower link side disposed around the inner cylinder, and a rubber-like elasticity interposed between the inner cylinder and the outer cylinder. With body. In order to improve durability, the rubber bush is usually subjected to drawing processing in the direction of reducing the diameter of the outer cylinder, and pre-compression is applied to the rubber-like elastic body interposed between the inner and outer cylinders. Further, Patent Document 1 discloses a rubber bushing that preliminarily compresses the rubber-like elastic body 103 by expanding the diameter of the inner cylinder 102 in place of or in combination with the drawing of the outer cylinder 101. is doing.

図6に特許文献1のゴムブッシュの断面図を示す。このゴムブッシュは、拡径しやすい薄肉の内筒102を拡径した後、薄肉の内筒102を補強する意味で、薄肉の内筒102に、これとは別に厚肉の内筒104を内嵌している。
特開平11-201218号公報(段落番号OO04,OO05、図8)
FIG. 6 shows a cross-sectional view of the rubber bush of Patent Document 1. This rubber bushing is intended to reinforce the thin inner cylinder 102 after expanding the thin inner cylinder 102 that is easy to expand. It is fitted.
Japanese Patent Laid-Open No. 11-201218 (paragraph numbers OO04, OO05, FIG. 8)

ところが、特許文献1のゴムブッシュは、その薄肉の内筒に厚肉の内筒を圧入する際に、薄肉の内筒を受け、かつ、厚肉の内筒を薄肉の内筒に対して中心軸方向に位置決めするための設備を必要とする。   However, the rubber bush of Patent Document 1 receives the thin inner cylinder when the thick inner cylinder is press-fitted into the thin inner cylinder, and the thick inner cylinder is centered with respect to the thin inner cylinder. Equipment for positioning in the axial direction is required.

本発明は、薄肉の内筒に厚肉の内筒を容易に圧入することができる構造のゴムブッシュを提供することを目的とする。   An object of the present invention is to provide a rubber bush having a structure in which a thick inner cylinder can be easily press-fitted into a thin inner cylinder.

上記課題を解決するために本発明が提供するゴムブッシュは、
内筒と、該内筒の周囲に配置された外筒と、前記内筒と前記外筒との間に介在されたゴム状弾性体とを備えたゴムブッシュであって、
前記内筒は、前記ゴム状弾性体を予備圧縮するために拡径される第1内筒に、該第1内筒よりも厚肉の第2内筒を内嵌圧入してなり、第2内筒は、その中心軸方向に二分割されて第1内筒の両端側から内嵌圧入され、二分割された第2内筒のそれぞれの外周面に、第1内筒の端面に当接して第2内筒を中心軸方向に位置決めする位置決め部が設けられ、
前記位置決め部は、第2内筒の中心軸に直交する方向に突出するフランジとされ、
前記内筒と前記外筒との間に中間筒が介在され、前記ゴム状弾性体は、内筒と中間筒との間、および外筒と中間筒との間のそれぞれに介在され、
前記中心軸方向で前記第1内筒は前記中間筒よりも短くされ、
前記フランジは前記第1内筒の外径よりも外径が大きく、かつ、前記中間筒よりも外径が小さくされて、前記第2内筒の中心軸に直交する方向で前記中間筒の内側に位置しているものである。
In order to solve the above problems, the rubber bush provided by the present invention is:
A rubber bush comprising an inner cylinder, an outer cylinder disposed around the inner cylinder, and a rubber-like elastic body interposed between the inner cylinder and the outer cylinder,
The inner cylinder is formed by press-fitting a second inner cylinder thicker than the first inner cylinder into a first inner cylinder whose diameter is expanded to pre-compress the rubber-like elastic body. The inner cylinder is divided into two in the direction of the central axis and is press-fitted from both ends of the first inner cylinder. The inner cylinder is in contact with the end surface of the first inner cylinder on each outer peripheral surface of the divided second inner cylinder. A positioning portion for positioning the second inner cylinder in the direction of the central axis is provided,
The positioning portion is a flange protruding in a direction perpendicular to the central axis of the second inner cylinder,
An intermediate cylinder is interposed between the inner cylinder and the outer cylinder, and the rubber-like elastic body is interposed between the inner cylinder and the intermediate cylinder, and between the outer cylinder and the intermediate cylinder,
The first inner cylinder is shorter than the intermediate cylinder in the central axis direction;
The flange has an outer diameter larger than the outer diameter of the first inner cylinder, and has an outer diameter smaller than that of the intermediate cylinder, and the inner side of the intermediate cylinder in a direction perpendicular to the central axis of the second inner cylinder Is located .

この構成によれ、第1内筒の両端に、二分割された第2内筒のそれぞれの内端を挿入し、この第2内筒の外端面同士を中心軸方向に挟圧することにより、第1内筒に第2内筒を内嵌圧入することができる。これにより、第2内筒を圧入する設備には、第2内筒の内嵌圧入に際して第1内筒を受ける受け部が不要になる。また、第2内筒自体に位置決め部を設けるので、圧入設備に第2内筒の位置決め用の部材が不要になり、圧入設備を簡単にすることができる。
According to this configuration, by inserting the inner ends of the second inner cylinder divided into two into both ends of the first inner cylinder, and pressing the outer end surfaces of the second inner cylinder in the direction of the central axis, The second inner cylinder can be press-fitted into the first inner cylinder. Accordingly, the equipment for press-fitting the second inner cylinder does not need a receiving portion for receiving the first inner cylinder when the second inner cylinder is press-fitted. In addition, since the positioning portion is provided in the second inner cylinder itself, a member for positioning the second inner cylinder is not required in the press-in equipment, and the press-in equipment can be simplified.

二分割された第2内筒のそれぞれの内端面から位置決め部までの長さは、その合計が第1内筒の長さに等しくなるように設定する。そうすれば、第1内筒に内嵌圧入した状態で、第1内筒の全長に渡って第2内筒を内嵌することになり、薄肉の第1内筒の全体を厚肉の第2内筒で補強することができる。また、第2内筒の内端面同士が当接するので、ボルト締結などによって内筒に作用する軸力を厚肉の第2内筒に受け持たせることができる。   The length from the inner end surface of each of the two divided inner cylinders to the positioning portion is set so that the total is equal to the length of the first inner cylinder. Then, the second inner cylinder is fitted over the entire length of the first inner cylinder in a state where the inner fitting is press-fitted into the first inner cylinder, and the entire thin first inner cylinder is Can be reinforced with 2 inner cylinders. Further, since the inner end surfaces of the second inner cylinder come into contact with each other, the axial force acting on the inner cylinder by bolt fastening or the like can be received by the thick second inner cylinder.

さらに、二分割された第2内筒のそれぞれの内端面から位置決め部までの長さは、両者共に第1内筒の長さの1/2に設定する。これにより、二分割された第2内筒を同じものとすることができ、部品の共通化を図ることができる。   Furthermore, the length from each inner end surface of the second inner cylinder divided into two to the positioning portion is set to 1/2 of the length of the first inner cylinder. Thereby, the 2nd inner cylinder divided into two can be made the same, and common use of parts can be aimed at.

なお、二分割された第2内筒は、その内端面から位置決め部までの長さを互いに異なる長さに設定してもよく、その長さの合計を第1内筒の長さよりも短く設定して、第2内筒の内端面同士の間に隙間ができるようにしてもよい。   Note that the length of the second inner cylinder divided into two may be set to different lengths from the inner end surface to the positioning portion, and the total length is set shorter than the length of the first inner cylinder. Then, a gap may be formed between the inner end surfaces of the second inner cylinder.

位置決め部は、第2内筒の外端側が第1内筒よりも大径になるように形成した段差であってもよいが、第2内筒の中心軸に直交する方向に突出するフランジとすれ、第2内筒の外端側の肉厚を薄くしてゴムブッシュの軽量化を図ることができる。 The positioning portion may be a step formed so that the outer end side of the second inner cylinder is larger in diameter than the first inner cylinder, and a flange projecting in a direction perpendicular to the central axis of the second inner cylinder If so , the thickness of the outer end side of the second inner cylinder can be reduced to reduce the weight of the rubber bush.

第2内筒の外端面が第1内筒の内径よりも大径であるものに本発明を採用すれば、本発明の好適な態様を提供することができる。つまり、第2内筒を分割していない場合には、その外端面が第1内筒の内径よりも大径であるものを第1内筒に内嵌圧入することができず、内嵌圧入後に第2内筒の外端面を拡径する必要がある。これに対して、第2内筒を二分割にすることにより、その外端面が第1内筒の内径よりも大径である第2内筒を第1内筒に圧入することができる。   If the present invention is adopted in the case where the outer end surface of the second inner cylinder is larger in diameter than the inner diameter of the first inner cylinder, a preferred aspect of the present invention can be provided. In other words, when the second inner cylinder is not divided, it is impossible to press fit the inner end of the first inner cylinder whose inner end is larger than the inner diameter of the first inner cylinder. It is necessary to enlarge the outer end surface of the second inner cylinder later. On the other hand, by dividing the second inner cylinder into two parts, the second inner cylinder whose outer end surface is larger in diameter than the inner diameter of the first inner cylinder can be press-fitted into the first inner cylinder.

内筒と外筒との間に中間筒が介在し、内筒と中間筒との間、および外筒と中間筒との間のそれぞれにゴム状弾性体が介在する構成のゴムブッシュは、内筒の周囲のゴム状弾性体に予備圧縮を与えるのに内筒を拡径するのがよく、本発明の好適な態様を提供することができる。また、ゴム状弾性体に液体を封入する液封部を形成した構成のゴムブッシュに本発明を採用することもできる。   A rubber bush having a structure in which an intermediate cylinder is interposed between the inner cylinder and the outer cylinder, and a rubber-like elastic body is interposed between the inner cylinder and the intermediate cylinder and between the outer cylinder and the intermediate cylinder, In order to preliminarily compress the rubber-like elastic body around the cylinder, it is preferable to expand the diameter of the inner cylinder, and a preferred embodiment of the present invention can be provided. Further, the present invention can be applied to a rubber bush having a configuration in which a liquid seal portion for sealing a liquid is formed in a rubber-like elastic body.

また、本発明は、内筒と、この内筒の周囲に配置された外筒と、内筒と外筒との間に介在されたゴム状弾性体とを備えたゴムブッシュを製造するゴムブッシュの製造方法を提供する。   The present invention also relates to a rubber bush for manufacturing a rubber bush including an inner cylinder, an outer cylinder disposed around the inner cylinder, and a rubber-like elastic body interposed between the inner cylinder and the outer cylinder. A manufacturing method is provided.

具体的には、まず、第1内筒とその周囲に配置した外筒との間にゴム状弾性体を介在させる。次いで、拡径ピンを挿通して第1内筒を拡径することによりゴム状弾性体を予備圧縮する。その後、第1内筒よりも厚肉で中心軸方向に二分割された第2内筒の内端を第1内筒の両端に挿入する。二分割された第2内筒のそれぞれの外周面に形成した位置決め部が第1内筒の端面に当接するまで、第2内筒をその外端面同士を挟圧するようにして第1内筒に内嵌圧入する。この第2内筒の内嵌圧入により、第1内筒をさらに拡径しつつ、第1内筒に第2内筒を固定してなる内筒を構成する。   Specifically, first, a rubber-like elastic body is interposed between the first inner cylinder and the outer cylinder arranged around the first inner cylinder. Next, the rubber-like elastic body is pre-compressed by inserting the diameter-expanding pin and expanding the diameter of the first inner cylinder. Thereafter, the inner ends of the second inner cylinder that is thicker than the first inner cylinder and divided into two in the central axis direction are inserted into both ends of the first inner cylinder. Until the positioning portion formed on each outer peripheral surface of the second inner cylinder divided into two comes into contact with the end face of the first inner cylinder, the second inner cylinder is clamped between the outer end faces of the first inner cylinder. Press fit inside. By the internal fitting press-fitting of the second inner cylinder, an inner cylinder is formed by fixing the second inner cylinder to the first inner cylinder while further expanding the diameter of the first inner cylinder.

ゴム状弾性体に液体を封入する液封部を形成する場合には、第1内筒とその周囲に配置した外筒との間にゴム状弾性体を介在させる手順として、第1内筒の周囲にゴム状弾性体を加硫成形して液封部を形成し、その周囲に外筒を配置して液中で縮径する。これにより、第1内筒およびゴム状弾性体を備えたゴム成形品に外筒を固定すると共に、液封部に液を封入する。   In the case of forming a liquid seal portion that encloses a liquid in the rubber-like elastic body, as a procedure for interposing the rubber-like elastic body between the first inner cylinder and the outer cylinder arranged around the first inner cylinder, A rubber-like elastic body is vulcanized and molded to form a liquid seal, and an outer cylinder is placed around the rubber seal to reduce the diameter in the liquid. As a result, the outer cylinder is fixed to the rubber molded product including the first inner cylinder and the rubber-like elastic body, and the liquid is sealed in the liquid sealing portion.

以上のとおり、本尭明によると、ゴムブツシュの内筒として、薄肉の第1内筒の両端側に二分割された厚肉の第2内筒を内嵌圧入した構造を採用し、その第2内筒自体に位置決め部を設けている。   As described above, according to the present invention, as the inner tube of the rubber bush, a structure in which a thick second inner tube divided into two on both end sides of the thin first inner tube is press-fitted is adopted. A positioning portion is provided in the inner cylinder itself.

この構造を採用することにより、第2内筒を中心軸方向に挟圧するだけで、第1内筒に対して中心軸方向の所定の位置まで容易に内嵌圧入することができる。これにより、その圧入設備における第1内筒の受け部、および第2内筒を第1内筒に対して中心軸方向に位置決めするための部位を不要にして、圧入設備を簡単にすることができる。   By adopting this structure, it is possible to easily press fit the first inner cylinder to a predetermined position in the central axis direction by simply pinching the second inner cylinder in the central axis direction. As a result, the receiving portion of the first inner cylinder in the press-fitting equipment and the part for positioning the second inner cylinder in the central axis direction with respect to the first inner cylinder are not required, and the press-fitting equipment can be simplified. it can.

以下、本発明を実施するための最良の形態について、図面を用いて説明する。図1は本発明に係るゴムブッシュを示す図であり、(a)は正面図、(b)は側面図である。図2は図1が示すゴムブッシュの断面図であり、(a)はA-A断面図、(b)はB-B断面図、(c)はC-C断面図である。   The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a rubber bush according to the present invention, where (a) is a front view and (b) is a side view. 2 is a cross-sectional view of the rubber bush shown in FIG. 1, in which (a) is a cross-sectional view along AA, (b) is a cross-sectional view along BB, and (c) is a cross-sectional view along CC.

このゴムブッシュは、例えばその中心軸を上下方向に向けて自動車のフロント側のロアリンクに設置される液封入式のゴムブツシュであり、内筒1と、内筒1の周囲に配置された外筒2と、内筒1と外筒2との間に配置された第1中間筒3と、さらに第1中間筒3と外筒2との間に配置された第2中間筒4と、内筒1と第1中間筒3との間に介在された第1ゴム状弾性体5と、第1中間筒3と外筒2との間に介在された第2ゴム状弾性体6と、液体を封入する液封部7と、第1中間筒3と外筒2との相対的な大変位を規制するストッパ金具8とを備えている。   This rubber bush is a liquid-filled rubber bush installed on a lower link on the front side of an automobile, for example, with its central axis facing up and down, and includes an inner cylinder 1 and an outer cylinder arranged around the inner cylinder 1 2, a first intermediate cylinder 3 disposed between the inner cylinder 1 and the outer cylinder 2, a second intermediate cylinder 4 disposed between the first intermediate cylinder 3 and the outer cylinder 2, and an inner cylinder 1 and a first rubber-like elastic body 5 interposed between the first intermediate cylinder 3, a second rubber-like elastic body 6 interposed between the first intermediate cylinder 3 and the outer cylinder 2, and a liquid A liquid sealing part 7 to be sealed and a stopper fitting 8 for restricting a relative large displacement between the first intermediate cylinder 3 and the outer cylinder 2 are provided.

内筒1は、第1ゴム状弾性体5を予備圧縮するための拡径が容易なように薄肉に設定された第1内筒9に、第1内筒9よりも厚肉の第2内筒10を内嵌圧入した構成とされ、薄肉の第1内筒9を厚肉の第2内筒10が補強するようになっている。   The inner cylinder 1 has a second inner wall thicker than the first inner cylinder 9 in a first inner cylinder 9 that is set to be thin so that the diameter for pre-compressing the first rubber-like elastic body 5 is easy. The tube 10 is configured to be press-fitted and the thin first inner tube 9 is reinforced by the thick second inner tube 10.

第1内筒9は、例えば冷間継ぎ目無し構造用鋼管(STKM11A-SC)により円筒状に形成される。   The first inner cylinder 9 is formed in a cylindrical shape by, for example, a cold seamless structural steel pipe (STKM11A-SC).

第2内筒10は、その中心軸方向に二分割されて、二分割された第2内筒10a,10bが第1内筒9の両端側から内嵌圧入されている。第2内筒10の外端面は、第1内筒9の内径よりも大径に設定され、内筒1の締結面積を大きく設定している。   The second inner cylinder 10 is divided into two in the central axis direction, and the two divided second inner cylinders 10a and 10b are press-fitted from both ends of the first inner cylinder 9. The outer end surface of the second inner cylinder 10 is set to have a larger diameter than the inner diameter of the first inner cylinder 9, and the fastening area of the inner cylinder 1 is set larger.

第2内筒10a,10bは、鋳造品又は鍛造品とされ、その外周面に第2内筒10a,10bの中心軸に直交する方向に突出するフランジ11が設けられている。フランジ11は、第1中間筒3の内周面に当接して内筒1と第1中間筒3との相対的な大変位を規制するストッパとしての機能と、第1内筒9の端面に当接して第2内筒10a,10bを中心軸方向に位置決めする位置決め部としての機能とを備えている。   The second inner cylinders 10a and 10b are cast or forged products, and a flange 11 is provided on the outer peripheral surface thereof so as to protrude in a direction perpendicular to the central axis of the second inner cylinders 10a and 10b. The flange 11 is in contact with the inner peripheral surface of the first intermediate cylinder 3 and functions as a stopper for restricting the relative large displacement between the inner cylinder 1 and the first intermediate cylinder 3, and on the end surface of the first inner cylinder 9. It has a function as a positioning part that contacts and positions the second inner cylinders 10a and 10b in the central axis direction.

第2内筒1Oa,10bのフランジ11から内端面12までの長さは、第1内筒9の長さの1/2の長さに設定されている。これにより、第2内筒10a,10bのフランジ11からフランジ11までの長さが第1内筒9の長さに等しくなり、第1内筒9の全体を補強する。また、第2内筒10a,10bの内端面12同士が当接することにより、内筒1に作用する軸力を厚肉の第2内筒10が受け持つようになっている。   The lengths from the flange 11 to the inner end face 12 of the second inner cylinders 1Oa, 10b are set to 1/2 the length of the first inner cylinder 9. Thereby, the length from the flange 11 to the flange 11 of the second inner cylinders 10a, 10b becomes equal to the length of the first inner cylinder 9, and the entire first inner cylinder 9 is reinforced. Further, when the inner end surfaces 12 of the second inner cylinders 10a and 10b are in contact with each other, the thick second inner cylinder 10 takes charge of the axial force acting on the inner cylinder 1.

外筒2は、円筒状に形成されたもので、その材質、径、厚みなどは適宜選択できるが、外筒2に絞り加工を施しやすい材質、例えば圧延鋼材(SPH,SPC)が使用可能である。また、外筒2の厚みも絞り加工を施しやすい厚みに設定するのがよい。この外筒2の径は使用箇所、第1、第2ゴム状弾性体5,6の減衰性能などにより適宜選択でき、筒状のものならば、本実施形態のような円筒状に限らず、角筒や楕円筒などであってもよい。   The outer cylinder 2 is formed in a cylindrical shape, and its material, diameter, thickness, etc. can be selected as appropriate, but materials that can be easily drawn to the outer cylinder 2, such as rolled steel (SPH, SPC) can be used. is there. The thickness of the outer cylinder 2 is also preferably set to a thickness that facilitates drawing. The diameter of the outer cylinder 2 can be appropriately selected depending on the use location, the damping performance of the first and second rubber-like elastic bodies 5, 6 and the like, as long as it is cylindrical, not limited to the cylindrical shape as in the present embodiment, A square tube or an elliptical tube may be used.

第1中問筒3は、円筒状に形成されたもので、こじり入力のほとんどを減衰する第1ゴム状弾性体5と、軸直角方向の入力を減衰する液封部7を有する第2ゴム状弾性体6とを仕切り、第1、第2ゴム状弾性体5,6の耐久性を向上させている。   The first intermediate cylinder 3 is formed in a cylindrical shape, and a second rubber having a first rubber-like elastic body 5 that attenuates most of the twisting input and a liquid sealing portion 7 that attenuates the input in the direction perpendicular to the axis. Thus, the durability of the first and second rubber-like elastic bodies 5 and 6 is improved.

第2中間筒4は、その中心軸方向における両端部が中央部よりも大径に形成され、その両端部を半径方向の内向きに締め付けるように外筒2が固定される。第2中間筒4の中心軸方向における中央部には、その左右部分に開口13が形成され、この開口13を通じて、第2中間筒4の内外の第2ゴム状弾性体6a,6bが連続している。   The second intermediate cylinder 4 has both end portions in the central axis direction larger in diameter than the center portion, and the outer cylinder 2 is fixed so that both end portions are tightened inward in the radial direction. An opening 13 is formed in the left and right portions of the central portion of the second intermediate cylinder 4 in the central axis direction, and the second rubber-like elastic bodies 6a and 6b inside and outside the second intermediate cylinder 4 are continuous through the opening 13. ing.

第1、第2ゴム状弾性体5,6は、要求される使用目的及び特性等により、天然ゴム、合成ゴム、あるいはこれらの混合した材料から適宜選択されるもので、第1内筒9、第1中間筒3および第2中間筒4に加硫接着されている。   The first and second rubber-like elastic bodies 5, 6 are appropriately selected from natural rubber, synthetic rubber, or a mixed material thereof according to the required purpose of use and characteristics, etc., and the first inner cylinder 9, The first intermediate cylinder 3 and the second intermediate cylinder 4 are vulcanized and bonded.

第2ゴム状弾性体6には、エチレングリコール液などの液を封入して、その液の流動により振動を減衰する液封部7が形成されている。液封部7は、二つの液室7a,7bと、液室7a,7bを連通するオリフィス14と、バルブ15によって開閉される予備通路16とからなる。   The second rubber-like elastic body 6 is formed with a liquid sealing portion 7 that encloses a liquid such as an ethylene glycol liquid and attenuates vibrations by the flow of the liquid. The liquid sealing portion 7 includes two liquid chambers 7a and 7b, an orifice 14 that communicates with the liquid chambers 7a and 7b, and a preliminary passage 16 that is opened and closed by a valve 15.

液室7a,7bは、第2中間筒4の開口13に対応する部位の外周面を凹設したものであり、開口13を貫通する深さに形成される。この液室7a,7bは、開口13と開口13との間において、第2中間筒4の外周面側に位置する第2ゴム状弾性体6bによって互いに仕切られている。   The liquid chambers 7a and 7b are formed by recessing the outer peripheral surface of the portion corresponding to the opening 13 of the second intermediate cylinder 4, and are formed to a depth penetrating the opening 13. The liquid chambers 7a and 7b are separated from each other by the second rubber-like elastic body 6b located on the outer peripheral surface side of the second intermediate cylinder 4 between the opening 13 and the opening 13.

液室7a,7bには、中心軸方向の中央部において、外筒2の内周面側から半径方向の内向きにストッパ金具8が突出している。ストッパ金具8は、第1中間筒3と外筒2とが相対的に大変位したときに、第1中間筒3の外周面を覆う第2ゴム状弾性体6からなる液室7a,7bの壁面に当接して、その変位を規制するストッパ部8aと、液室7a,7bを仕切る第2ゴム状弾性体6bに埋設される棒状部8bとからなり、全体として、二つ割りの略リング状を構成する。   In the liquid chambers 7a and 7b, a stopper fitting 8 projects inward in the radial direction from the inner peripheral surface side of the outer cylinder 2 at the central portion in the central axis direction. When the first intermediate cylinder 3 and the outer cylinder 2 are relatively displaced, the stopper metal fitting 8 is provided for the liquid chambers 7a and 7b made of the second rubber-like elastic body 6 that covers the outer peripheral surface of the first intermediate cylinder 3. It consists of a stopper part 8a that abuts against the wall surface and restricts its displacement, and a rod-like part 8b embedded in the second rubber-like elastic body 6b that partitions the liquid chambers 7a and 7b. Constitute.

オリフィス14は、ストッパ金具8に形成され、そのストッパ部8aに形成された出入口を介して液室7a,7bを連通する。   The orifice 14 is formed in the stopper fitting 8, and communicates with the liquid chambers 7a and 7b through an inlet / outlet formed in the stopper portion 8a.

予備通路16は、液室7a,7bを仕切る第2ゴム状弾性体6bに形成された通路であり、通常は、バルブ15によって閉じられている。液室7a,7bのうちの一方における液圧が高まって、その液圧によりバルブ15が開いたときに液室7a,7bを連通することにより、液圧が過大になることを防止して、第2ゴム状弾性体6の耐久性を高めるようになっている。   The preliminary passage 16 is a passage formed in the second rubber-like elastic body 6b that partitions the liquid chambers 7a and 7b, and is normally closed by a valve 15. When the fluid pressure in one of the fluid chambers 7a and 7b increases and the valve 15 is opened by the fluid pressure, the fluid chambers 7a and 7b communicate with each other to prevent the fluid pressure from becoming excessive, The durability of the second rubber-like elastic body 6 is enhanced.

次に、本発明のゴムブッシュを製造するゴムブッシュの製造方法を説明する。   Next, the manufacturing method of the rubber bush which manufactures the rubber bush of this invention is demonstrated.

まず、第1内筒9、第1中間筒3および第2中間筒4に化成処理や接着剤塗布などの金属処理を施し、第1内筒9の周囲に第1中間筒3を配置して、その周囲に第2中間筒4を配置する。   First, the first inner cylinder 9, the first intermediate cylinder 3 and the second intermediate cylinder 4 are subjected to metal treatment such as chemical conversion treatment or adhesive application, and the first intermediate cylinder 3 is disposed around the first inner cylinder 9. The second intermediate cylinder 4 is disposed around the periphery.

次いで、第1内筒9と第1中間筒3との間に第1ゴム状弾性体5を、第1中間筒3と第2中間筒との間に第2ゴム状弾性体6aを、第2中間筒の外周側に第2ゴム状弾性体6bを加硫成形する。これにより、第1内筒9、第1中間筒3、第2中間筒4および第1、第2ゴム状弾性体5,6からなるゴム成形品が構成される。   Next, the first rubber-like elastic body 5 is provided between the first inner cylinder 9 and the first intermediate cylinder 3, the second rubber-like elastic body 6a is provided between the first intermediate cylinder 3 and the second intermediate cylinder, The second rubber-like elastic body 6b is vulcanized on the outer peripheral side of the two intermediate cylinders. Thus, a rubber molded product including the first inner cylinder 9, the first intermediate cylinder 3, the second intermediate cylinder 4, and the first and second rubber-like elastic bodies 5 and 6 is formed.

ゴム成形品の第2中間筒4の両端部に絞り加工を施して縮径しつつ、その両端縁の径が小さくなるように中心軸方向に対して傾斜させる。ゴム成形品の中心軸方向における中央部に、二つ割りのストッパ金具8を装着して、ゴム成形品の周囲を取り巻く略リング状のストッパ金具8を構成する。   The both ends of the second intermediate cylinder 4 of the rubber molded product are drawn to reduce the diameter, and are inclined with respect to the central axis direction so that the diameters of both end edges are reduced. A substantially ring-shaped stopper fitting 8 surrounding the periphery of the rubber molded product is configured by mounting a split metal fitting 8 at the center in the central axis direction of the rubber molded product.

ストッパ金具8を装着したゴム成形品を液中で治具にセットして、これに外筒2を被せ、外筒2に絞り加工を施して縮径する。これにより、外筒2で第2中間筒4の両端部およびストッパ金具8を締め付けて、ゴム成形品に外筒2を固定すると共に、液封部7に液を封入する。その後、外筒2の両端縁にカーリング加工を施して半径方向の内向きにカールさせる。   A rubber molded product equipped with the stopper fitting 8 is set in a jig in a liquid, covered with the outer cylinder 2, and the outer cylinder 2 is drawn to reduce its diameter. As a result, both ends of the second intermediate cylinder 4 and the stopper fitting 8 are fastened by the outer cylinder 2 to fix the outer cylinder 2 to the rubber molded product, and the liquid is sealed in the liquid sealing part 7. Thereafter, the both ends of the outer cylinder 2 are curled to curl inward in the radial direction.

図3に示すように、拡径治具17を用いて、第1内筒9を拡径して第1ゴム状弾性体5を予備圧縮した後、圧入治具18を用いて、第1内筒9の両端側から第2内筒10a,10bを内嵌圧入し、防錆液を塗布してゴムブッシュの製造が完了する。   As shown in FIG. 3, the first inner cylinder 9 is expanded using the diameter expansion jig 17, and the first rubber-like elastic body 5 is pre-compressed. The second inner cylinders 10a and 10b are press-fitted from both ends of the cylinder 9, and the rust preventive liquid is applied to complete the production of the rubber bush.

ここで、拡径用治具17の構成、および拡径用治具17を用いて第1内筒9を拡径する手順について説明する。図4は拡径用治具の側面図である。   Here, the configuration of the diameter expansion jig 17 and the procedure for expanding the diameter of the first inner cylinder 9 using the diameter expansion jig 17 will be described. FIG. 4 is a side view of the diameter expansion jig.

この拡径用治具17は、第2内筒10a,10bを圧入する前のゴムブッシュを載置する載置台19と、第1内筒9に挿通して拡径する拡径ピン20とからなる。   The diameter expansion jig 17 includes a mounting table 19 on which a rubber bush before the second inner cylinders 10a and 10b are press-fitted, and a diameter expansion pin 20 that is inserted into the first inner cylinder 9 to expand the diameter. Become.

載置台19の上面には、第1内筒9の一端を受ける受け部21が突設されている。受け部21は、拡径ピン20を貫通させる貫通孔22を有する断面円形の突起とされ、第1中間筒3に内嵌されてゴムブッシュを位置決めすると共に、その上面で第1内筒9の一端を受けるようになっている。受け部21の高さは、第1中間筒3の端面から第1内筒9の端面までの距離とほぼ等しくされる。   A receiving portion 21 that receives one end of the first inner cylinder 9 protrudes from the upper surface of the mounting table 19. The receiving portion 21 is a protrusion having a circular cross section having a through hole 22 that penetrates the enlarged pin 20, and is fitted in the first intermediate cylinder 3 to position the rubber bush, and on the upper surface of the first inner cylinder 9 Receive one end. The height of the receiving portion 21 is substantially equal to the distance from the end surface of the first intermediate cylinder 3 to the end surface of the first inner cylinder 9.

拡径ピン20を構成する部位は、先端側から順に、挿入部23、第1拡径部24、中央部25、第2拡径部26および基端部27とされる。挿入部23は拡径前の第1内筒9よりも小径とされ、第1拡径部24は拡径前の第1内筒9よりも大径とされる。中央部25は第1拡径部24よりも小径とされ、第2拡径部26は第1拡径部24よりも大径とされる。基端部27は第2拡径部26よりも小径とされる。第1拡径部24は、挿入部23および中央部25とテーパで連続し、第2拡径部26は、中央部25および基端部27とテーパで連続する。   The parts constituting the enlarged pin 20 are an insertion part 23, a first enlarged part 24, a central part 25, a second enlarged part 26, and a proximal end part 27 in order from the distal end side. The insertion portion 23 has a smaller diameter than the first inner cylinder 9 before diameter expansion, and the first diameter-expanded portion 24 has a larger diameter than the first inner cylinder 9 before diameter expansion. The central portion 25 has a smaller diameter than the first expanded portion 24, and the second expanded portion 26 has a larger diameter than the first expanded portion 24. The proximal end portion 27 has a smaller diameter than the second enlarged diameter portion 26. The first enlarged diameter portion 24 is continuous with the insertion portion 23 and the central portion 25 with a taper, and the second enlarged diameter portion 26 is continuous with the central portion 25 and the base end portion 27 with a taper.

載置台19にゴムブッシュを載置して、載置台19の受け部21にセットした第1内筒9に、拡径ピン20の挿入部23を挿入して押し込んでいくことにより、まず、第1拡径部24が第1内筒9を拡径する。次いで、第1拡径部24よりも小径の中央部25が通る際に、第1内筒9と拡径ピン20との接触面積が小さくなり、拡径ピン20の押し込みに要する力も小さくなる。第2拡径部26で第1内筒9をさらに拡径した後、基端部27が通るときには、第1内筒9と拡径ピン20との間に隙間ができ、拡径ピン20を容易に抜き出すことができる。   First, by placing a rubber bush on the mounting table 19 and inserting and inserting the insertion portion 23 of the diameter expansion pin 20 into the first inner cylinder 9 set on the receiving portion 21 of the mounting table 19, 1 The diameter-expanded portion 24 expands the diameter of the first inner cylinder 9. Next, when the central portion 25 having a smaller diameter than the first enlarged diameter portion 24 passes, the contact area between the first inner cylinder 9 and the enlarged diameter pin 20 is reduced, and the force required to push the enlarged diameter pin 20 is also reduced. After further expanding the diameter of the first inner cylinder 9 with the second expanded diameter portion 26, when the base end portion 27 passes, a gap is formed between the first inner cylinder 9 and the expanded diameter pin 20, and the expanded diameter pin 20 is Can be easily extracted.

次に、圧入治具18の構成、および圧入治具18を用いて第1内筒9の両端側から第2内筒10a,10bを内嵌圧入する手順について説明する。図5は圧入治具の側面図である。   Next, the configuration of the press-fitting jig 18 and the procedure for press-fitting the second inner cylinders 10a and 10b from both ends of the first inner cylinder 9 using the press-fitting jig 18 will be described. FIG. 5 is a side view of the press-fitting jig.

圧入治具18は、載置台28と、載置台28の上面に立設されて第2内筒10a、第1内筒9および第2内筒10bをその中心軸方向にスライド白在に案内するガイド29と、上側の第2内筒10aを下向きに押圧するための押し筒30とからなる。   The press-fitting jig 18 is erected on the mounting table 28 and the upper surface of the mounting table 28, and guides the second inner cylinder 10a, the first inner cylinder 9 and the second inner cylinder 10b to the slide white in the direction of the central axis. The guide 29 and a push cylinder 30 for pressing the upper second inner cylinder 10a downward.

ガイド29は、その外径が第2内筒10a,10bの内径よりもわずかに小さい円柱状とされる。このガイド29に、第2内筒10bをその内端面12を上向きにして装着し、その上10にゴムブッシュの第1内筒9を装着し、その上に第2内筒10aをその内端面12を下向きにして装着する。これにより、載置台28に、第2内筒10a、第1内筒9および第2内筒10bが、上からこの順番で載置される。   The guide 29 has a cylindrical shape whose outer diameter is slightly smaller than the inner diameter of the second inner cylinders 10a and 10b. The second inner cylinder 10b is mounted on the guide 29 with its inner end face 12 facing upward, the first inner cylinder 9 of the rubber bush is mounted on the upper 10, and the second inner cylinder 10a is mounted on the inner end face thereof. Wear with 12 facing down. As a result, the second inner cylinder 10a, the first inner cylinder 9, and the second inner cylinder 10b are placed on the mounting table 28 in this order from the top.

第1内筒9の両端の内周面側および第2内筒10a,10bの内端の外周面側には面取りが形成され、第1内筒9および第2内筒10a,10bをガイド29に装着した状態で、第1内筒9の両端に、第2内筒10a,10bの内端がわずかに挿入される。   Chamfering is formed on the inner peripheral surface side of both ends of the first inner cylinder 9 and on the outer peripheral surface side of the inner ends of the second inner cylinders 10a, 10b, and guides the first inner cylinder 9 and the second inner cylinders 10a, 10b to the guide 29. The inner ends of the second inner cylinders 10a and 10b are slightly inserted into both ends of the first inner cylinder 9 in a state of being attached to the inner cylinder 9.

押し筒30は、その外径が第2内筒10aの外端面よりも大径で、その内径が第2内筒10a,10bとほぼ同じ大きさの筒体とされる。この押し筒30は、第2内筒10aに積み重ねるようにガイド29に装着して、ガイド29に沿って第2内筒10aの外端面を押圧するものである。   The push cylinder 30 is a cylinder whose outer diameter is larger than the outer end surface of the second inner cylinder 10a and whose inner diameter is substantially the same as that of the second inner cylinders 10a and 10b. The push cylinder 30 is attached to the guide 29 so as to be stacked on the second inner cylinder 10a, and presses the outer end surface of the second inner cylinder 10a along the guide 29.

押し筒30で第2内筒10aの外端面を押圧して、載置台28と押し筒30とで第2内筒10
a、10bを挟圧することにより、第1内筒9を中心軸方向に保持することなく、その両側から第2内筒10a,10bが同時に圧入される。なお、予め、拡径治具17によって、第1内筒9にある程度の拡径を施しておくので、第2内筒10a,10bを圧入する際に、第1内筒9が潰れずにすむ。
By pressing the outer end surface of the second inner cylinder 10a with the push cylinder 30, the second inner cylinder 10 is placed between the mounting table 28 and the push cylinder 30.
By sandwiching a and 10b, the second inner cylinders 10a and 10b are simultaneously press-fitted from both sides without holding the first inner cylinder 9 in the central axis direction. Since the first inner cylinder 9 is expanded to some extent by the diameter expansion jig 17 in advance, the first inner cylinder 9 can be prevented from being crushed when the second inner cylinders 10a and 10b are press-fitted. .

第2内筒10a,10bのフランジ11が第1内筒9の端面に当接することにより、圧入治具18に位置決め部を設けることなく、第1内筒9に対して、第2内筒10a,10bが中心軸方向に位置決めされる。   The flanges 11 of the second inner cylinders 10a and 10b abut against the end surface of the first inner cylinder 9, so that the second inner cylinder 10a is not provided with a positioning portion in the press-fitting jig 18 with respect to the first inner cylinder 9. , 10b are positioned in the central axis direction.

第1内筒9に第2内筒10a,10bを圧入することにより、拡径治具17で拡径した第1内筒9がさらに拡径される。これにより、第1ゴム状弾性体5がさらに予備圧縮され、かつ、第1内筒9に第2内筒10a,10bが固定されて、第1内筒9と第2内筒10a,10bとからなる内筒1が構成される。   By press-fitting the second inner cylinders 10a and 10b into the first inner cylinder 9, the diameter of the first inner cylinder 9 expanded by the diameter expansion jig 17 is further expanded. Thereby, the first rubber-like elastic body 5 is further pre-compressed, and the second inner cylinders 10a and 10b are fixed to the first inner cylinder 9, and the first inner cylinder 9 and the second inner cylinders 10a and 10b are An inner cylinder 1 composed of

[産業上の利用可能性]
本発明のゴムブッシュは、自動車の懸架装置やエンジンの支持部などに装備する防振装置として使用することができる。特に、液封入式のゴムブッシュとすることにより、例えば、自動車のフロント側のロアリンクにおけるリア側に設置して、フロントタイヤのアンバランスによりハンドルに伝わる振動を吸収するために使用することができる。
[Industrial applicability]
The rubber bush of the present invention can be used as an anti-vibration device equipped in a suspension device of an automobile, a support portion of an engine or the like. In particular, by using a liquid-filled rubber bush, for example, it can be installed on the rear side of the lower link on the front side of an automobile and used to absorb vibration transmitted to the steering wheel due to unbalance of the front tire. .

本発明に係るゴムブッシュを示す図The figure which shows the rubber bush which concerns on this invention 図1が示すゴムブッシュの断面図Cross section of rubber bush shown in Fig. 1 第1内筒の拡径方法および第2内筒の圧入方法を示す図Diagram showing the diameter expansion method of the first inner cylinder and the press-fitting method of the second inner cylinder 拡径治具の側面図Side view of diameter expansion jig 圧入治具の側面図Side view of press-fitting jig 従来のゴムブッシュの断面図Cross section of conventional rubber bush

符号の説明Explanation of symbols

1 内筒
2 外筒
3 第1中間筒
4 第2中間筒
5 第1ゴム状弾性体
6,6a,6b
第2ゴム状弾性体
7 液封部
7a,7b
液室
8 ストッパ金具
8a ストッパ部
8b 棒状部
9 第1内筒
10,10a,10b
第2内筒
11 フランジ
12 内端面
13 開口
14 オリフィス
15 バルブ
16 予備通路
17 拡径治具
18 圧入治具
19 載置台
20 拡径ピン
21 受け部
22 貫通孔
23 挿入部
24 第1拡径部
25 中央部
26 第2拡径部
27 基端部
28 載置台
29 ガイド
30 押し筒
1 Inner cylinder
2 outer cylinder
3 First intermediate tube
4 Second intermediate tube
5 1st rubber-like elastic body
6,6a, 6b
2nd rubber-like elastic body
7 Liquid seal
7a, 7b
Liquid chamber 8 Stopper bracket
8a Stopper part
8b Rod
9 1st inner cylinder
10,10a, 10b
2nd inner cylinder
11 Flange
12 Inner end face
13 opening
14 Orifice
15 Valve
16 Preliminary passage
17 Diameter expansion jig
18 Press-fitting jig
19 Mounting table
20 Expanding pin
21 Receiver
22 Through hole
23 Insertion section
24 1st enlarged diameter part
25 Center
26 2nd enlarged diameter part
27 Base end
28 mounting table
29 Guide
30 Push cylinder

Claims (5)

内筒と、該内筒の周囲に配置された外筒と、前記内筒と前記外筒との間に介在されたゴム状弾性体とを備えたゴムブッシュであって、
前記内筒は、前記ゴム状弾性体を予備圧縮するために拡径される第1内筒に、該第1内筒よりも厚肉の第2内筒を内嵌圧入してなり、第2内筒は、その中心軸方向に二分割されて第1内筒の両端側から内嵌圧入され、二分割された第2内筒のそれぞれの外周面に、第1内筒の端面に当接して第2内筒を中心軸方向に位置決めする位置決め部が設けられ、
前記位置決め部は、第2内筒の中心軸に直交する方向に突出するフランジとされ、
前記内筒と前記外筒との間に中間筒が介在され、前記ゴム状弾性体は、内筒と中間筒との間、および外筒と中間筒との間のそれぞれに介在され、
前記中心軸方向で前記第1内筒は前記中間筒よりも短くされ、
前記フランジは前記第1内筒の外径よりも外径が大きく、かつ、前記中間筒よりも外径が小さくされて、前記第2内筒の中心軸に直交する方向で前記中間筒の内側に位置しているゴムブッシュ。
A rubber bush comprising an inner cylinder, an outer cylinder disposed around the inner cylinder, and a rubber-like elastic body interposed between the inner cylinder and the outer cylinder,
The inner cylinder is formed by press-fitting a second inner cylinder thicker than the first inner cylinder into a first inner cylinder whose diameter is expanded to pre-compress the rubber-like elastic body. The inner cylinder is divided into two in the direction of the central axis and is press-fitted from both ends of the first inner cylinder. The inner cylinder is in contact with the end surface of the first inner cylinder on each outer peripheral surface of the divided second inner cylinder. A positioning portion for positioning the second inner cylinder in the direction of the central axis is provided,
The positioning portion is a flange protruding in a direction perpendicular to the central axis of the second inner cylinder,
An intermediate cylinder is interposed between the inner cylinder and the outer cylinder, and the rubber-like elastic body is interposed between the inner cylinder and the intermediate cylinder, and between the outer cylinder and the intermediate cylinder,
The first inner cylinder is shorter than the intermediate cylinder in the central axis direction;
The flange has an outer diameter larger than the outer diameter of the first inner cylinder, and has an outer diameter smaller than that of the intermediate cylinder, and the inner side of the intermediate cylinder in a direction perpendicular to the central axis of the second inner cylinder The rubber bush that is located in .
二分割された第2内筒のそれぞれの内端面から前記位置決め部までの長さの合計が第1内筒の長さに等しく設定されたことを特徴とする請求項1に記載のゴムブッシュ。   2. The rubber bush according to claim 1, wherein a total length from each inner end surface of the second inner cylinder divided into two to the positioning portion is set equal to a length of the first inner cylinder. 二分割された第2内筒のそれぞれの内端面から前記位置決め部までの長さが第1内筒の長さの1/2に設定されたことを特徴とする請求項2に記載のゴムブッシュ。   3. The rubber bush according to claim 2, wherein a length from each inner end surface of the second inner cylinder divided into two to the positioning portion is set to 1/2 of a length of the first inner cylinder. . 第2内筒は、その外端面を第1内筒の内径よりも大径に設定されたことを特徴とする請求項1に記載のゴムブッシュ。   2. The rubber bush according to claim 1, wherein an outer end surface of the second inner cylinder is set to be larger than an inner diameter of the first inner cylinder. 前記ゴム状弾性体に液体を封入する液封部が形成されたことを特徴とする請求項1に記載のゴムブッシュ。
2. The rubber bush according to claim 1, wherein a liquid sealing portion for sealing a liquid is formed in the rubber-like elastic body.
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US9829385B2 (en) 2004-07-05 2017-11-28 Heraeus Electro-Nite International N.V. Container for molten metal, use of the container and method for determining an interface

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JP2008057731A (en) * 2006-09-01 2008-03-13 Honda Motor Co Ltd Bush structure and its manufacturing method
JP5687102B2 (en) * 2011-03-18 2015-03-18 東洋ゴム工業株式会社 Vibration isolator
DE102019006047A1 (en) * 2019-08-27 2021-03-04 Sumitomo Riko Company Limited Hydraulic bearing and method of making a hydraulic bearing

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9829385B2 (en) 2004-07-05 2017-11-28 Heraeus Electro-Nite International N.V. Container for molten metal, use of the container and method for determining an interface

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