JPH04113048A - Cylindrical antirattle rubber - Google Patents

Abstract

PURPOSE:To reduce number of parts, so as to facilitate assembly, and to restrain impact noise so as to improve durability by forming a side stopper portion, opposing to a bracket, on both sides of an outside circumference groove of a rubber where the bracket fits in. CONSTITUTION:An inner cylinder 1 provided with a rubber 2 on the outside circumference is formed in a manner that, for example, a bracket 10 on a body of an automobile can be fitted on its both ends. This fitting manner forms an outside circumference groove 3, where a bracket 20 of an engine fits in, on the outside circumference of the rubber 2 formed on the outside circumference of the inner cylinder 1 through which a bolt 11 is inserted and one end thereof is secured with a nut. A flange shaped side stopper portion 4 is formed on both sides in the axis direction of the outside circumference groove 3 opposing to the bracket 10 fitted on both ends of the inner cylinder 1. When vibration is generated with this cylindrical antirattle rubber fitted, impact noise is restrained and mutual collision among the brackets 10, 20 is avoided thus preventing possibility of damage thereof, because the bracket 20 on the engine side fits into the outside circumference groove 3 and both sides are enveloped in the side stopper portion 4.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 コノ発明は、車両のエンジンとボディとの間に設けられ
るエンジンマウントと呼ばれるような筒形防振ゴムに関
する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cylindrical anti-vibration rubber such as an engine mount provided between a vehicle engine and a body.

〔従来の技術〕[Conventional technology]

従来のこの種の筒形防振ゴムとしては、第８図に示すよ
うに、内筒１００の外周にゴム１０１を有し、内筒１０
０の両端はボルト１０２とナツト１０３を介してボディ
側のブラケット１０に取付き、ゴム１０１の外周に設け
た外筒１０４にはエンジン側のブラケット２０が取付い
ている。また、振動に伴って外筒１０４とブラケット２
０がブラケット１０に衝突し、衝突音が発生しかつ破損
するおそれもあるため、内筒１００の両端にサイドスト
ッパ１０５を設けていた。As shown in FIG. 8, this type of conventional cylindrical anti-vibration rubber has a rubber 101 on the outer periphery of an inner cylinder 100.
Both ends of 0 are attached to a bracket 10 on the body side via bolts 102 and nuts 103, and a bracket 20 on the engine side is attached to an outer cylinder 104 provided on the outer periphery of the rubber 101. In addition, due to the vibration, the outer cylinder 104 and the bracket 2
0 collides with the bracket 10, producing a collision sound and possibly causing damage, so side stoppers 105 were provided at both ends of the inner cylinder 100.

〔解決しようとする課題〕[Problem to be solved]

従来の筒形防振ゴムは、外筒１０４があるために、エン
ジンの重量がブラケット２０を介してゴム１０１にかか
ると、外筒１０４とゴム１０１とが接着しであると両者
の剥離が生じたり、ゴム１０１が破損したりすることが
あった。第９図は、従来の筒形防振ゴムにエンジン重量
の荷重がかかったときの撓み量を示し、一定の荷重がか
かったときに符号Ｘで示す個所、すなわち変局点が生ず
る。そのために耐久性の面でも問題があった。さらに、
サイドストッパ１０５が必要であるため、部品点数の増
加、組立ての面倒さも生じていた。Since the conventional cylindrical anti-vibration rubber has an outer cylinder 104, when the weight of the engine is applied to the rubber 101 through the bracket 20, if the outer cylinder 104 and the rubber 101 are bonded together, they will separate. In some cases, the rubber 101 may be damaged. FIG. 9 shows the amount of deflection when a conventional cylindrical anti-vibration rubber is loaded with the weight of an engine. When a constant load is applied, a point indicated by the symbol X, that is, an inflection point occurs. Therefore, there was also a problem in terms of durability. moreover,
Since the side stopper 105 is required, the number of parts increases and assembly becomes troublesome.

さらには、サイドストッパ１０５へ外筒１０４とブラケ
ット２０とが衝突するために衝突音は依然として発生し
、耐久性の面でも問題があった。Furthermore, since the outer cylinder 104 and the bracket 20 collide with the side stopper 105, collision noise still occurs, and there is also a problem in terms of durability.

そこで、この発明は、外筒やサイドストッパを廃止して
部品点数の減少及び組立ての容易化を図り、衝突音の抑
止並びに耐久性の向上を図った筒形防振ゴムを提供する
ことを目的とする。Therefore, an object of this invention is to provide a cylindrical anti-vibration rubber that eliminates the outer cylinder and side stopper, reduces the number of parts, facilitates assembly, suppresses collision noise, and improves durability. shall be.

〔課題を解決するための手段〕[Means to solve the problem]

上述の目的を達成するため、この発明は、内筒の外周に
ゴムを有し、内筒両端とゴムの外周とに夫々ブラケット
が取付く筒形防振ゴムにおいて、ゴムの外周にブラケッ
トが嵌まり込む外周溝を形成するとともにこの外周溝の
軸線方向両側に内筒両端に取付くブラケットに対向する
鍔状のサイドストッパ部を形成したものである。To achieve the above object, the present invention provides a cylindrical anti-vibration rubber having rubber on the outer periphery of the inner cylinder and brackets attached to both ends of the inner cylinder and the outer periphery of the rubber, in which the brackets are fitted to the outer periphery of the rubber. An outer circumferential groove into which the inner tube fits is formed, and side stopper portions in the form of flanges are formed on both sides of the outer circumferential groove in the axial direction to face brackets attached to both ends of the inner cylinder.

〔作用〕[Effect]

この発明の筒形防振ゴムを夫々のブラケットに取付けた
状態において、振動が生じたとき、例えばエンジン側の
ブラケットは外周溝に嵌まり込み両端がサイドストッパ
部で包み込まれるので、このブラケットが他のブラケッ
トに直接ぶつかることがなくなり、ゴムから成るサイド
ストッパ部が他のブラケットに衝突するため衝突音が抑
止され、ブラケットどうしによる衝突を回避できること
により破損のおそれも防止できる。また、この筒形防振
ゴムでは、従来の外筒やサイドストッパが不要となるた
め、部品点数が少なくなり、各ブラケットへの組付けも
簡単になる。筒形防振ゴムそのものも軽量化も図れる。When vibration occurs when the cylindrical anti-vibration rubber of this invention is attached to each bracket, for example, the bracket on the engine side will fit into the outer circumferential groove and both ends will be wrapped by the side stopper parts, so that this bracket Since the side stopper portion made of rubber collides with other brackets, collision noise is suppressed, and collisions between brackets can be avoided, thereby preventing damage. In addition, this cylindrical vibration-proof rubber eliminates the need for the conventional outer cylinder and side stopper, so the number of parts is reduced and assembly to each bracket is simplified. The cylindrical anti-vibration rubber itself can also be made lighter.

また、外筒がないために従来の如き変局点が生ぜず、耐
久性も向上する。Furthermore, since there is no outer cylinder, there is no inflection point as in the conventional case, and durability is improved.

〔実施例〕〔Example〕

以下に、この発明の好適な実施例を図面を参照にして説
明する。Preferred embodiments of the present invention will be described below with reference to the drawings.

第１図に示す第１実施例では、内筒１の外周にゴム２を
有し、内筒１の両端に例えば車両のボディ側のブラケッ
）１０が取付くようになっている。In the first embodiment shown in FIG. 1, an inner cylinder 1 has rubber 2 on its outer periphery, and brackets 10 (for example, on the body side of a vehicle) are attached to both ends of the inner cylinder 1.

このような取付けは、内筒１にボルト１１を挿通し、ボ
ルト１１の一端側をナツト１２で締着しである。この内
筒１の外周に形成されたゴム２の外周には例えばエンジ
ン側のブラケット２０が嵌まり込む外周溝３を形成しで
ある。この外周溝３の軸線方向両側には内筒１の両端に
取付くブラケット１０に対向する鍔状のサイドストッパ
部４を形成しである。Such attachment is accomplished by inserting a bolt 11 into the inner cylinder 1 and tightening one end of the bolt 11 with a nut 12. On the outer periphery of the rubber 2 formed on the outer periphery of the inner cylinder 1, an outer periphery groove 3 into which, for example, an engine side bracket 20 is fitted is formed. Flange-shaped side stopper portions 4 are formed on both sides of the outer circumferential groove 3 in the axial direction to face brackets 10 attached to both ends of the inner cylinder 1.

第２図ないし第４図は第２実施例を示し、ゴム２に円弧
状の溝部５を片面に２個所ずつ合計４個所形成したもの
を示す。第４図はブラケット２０を外周溝３に嵌め込ん
だ状態を示す。この第２実施例では上方からの荷重を想
定してゴム２の中心よりも内筒１の中心を下方にずらし
である。2 to 4 show a second embodiment, in which arcuate grooves 5 are formed in the rubber 2 at two locations on each side, for a total of four locations. FIG. 4 shows a state in which the bracket 20 is fitted into the outer circumferential groove 3. In this second embodiment, the center of the inner cylinder 1 is shifted downward from the center of the rubber 2 assuming a load from above.

第５図は第３実施例を示し、外周溝３の周面にリング状
の溝６を形成したものを示す。このような溝６の形成に
よりブラケット２０の嵌め込みが容易となる。FIG. 5 shows a third embodiment, in which a ring-shaped groove 6 is formed on the circumferential surface of the outer circumferential groove 3. By forming the groove 6 in this manner, the bracket 20 can be easily fitted.

第６図に示す第４実施例では、ゴム１に形成される溝部
５の形状を変えたものを示す。In the fourth embodiment shown in FIG. 6, the shape of the groove 5 formed in the rubber 1 is changed.

いずれの実施例においても、内筒１のみがゴム２と接着
され、ブラケット２０とゴム１とは非接着とする。In both embodiments, only the inner tube 1 is bonded to the rubber 2, and the bracket 20 and the rubber 1 are not bonded to each other.

第７図に示すグラフは、第１実施例の筒形防振ゴムにお
ける荷重と撓み量との関係を示すものであり、第９図に
示すような変局点Ｘが存在しないので、耐久性も向上す
る。第１図に示す実施例ではゴム１に溝部５を形成して
おらず、その結果ゴム２のボリュームが増加し、ボリュ
ーム増加による耐久性の向上も可能となる。The graph shown in FIG. 7 shows the relationship between the load and the amount of deflection in the cylindrical anti-vibration rubber of the first example, and since there is no inflection point X as shown in FIG. It also improves. In the embodiment shown in FIG. 1, the groove portion 5 is not formed in the rubber 1, and as a result, the volume of the rubber 2 increases, and durability can also be improved by increasing the volume.

〔効果〕〔effect〕

以上説明したように、この発明によれば、ゴムの外周に
ブラケットが嵌まり込む外周溝を形成するとともにこの
外周溝の軸線方向両側に内筒両端に取付くブラケットに
対向する鍔状のサイドストッパ部を形成したので、従来
のような外筒やサイド、ストッパが不要となり、部品点
数が減少し、ブラケットへの組付けも容易となる。また
、外筒が不要となるため、絞り加工も不要となる。防振
ゴムそのものも従来に比較して軽量化が図れる。さらに
、外周溝に嵌め込まれたブラケットは鍔状のサイドスト
ッパ部で覆われるため他のブラケットに直接ぶつからず
、ゴムから成るサイドストッパ部が他のブラケットにぶ
つかり、緩衝作用が生じ、衝突音を抑止できるとともに
、金具どうしによるぶつかり合いがなくなるために破損
も生じない。As explained above, according to the present invention, an outer circumferential groove into which the bracket fits is formed on the outer circumference of the rubber, and flanged side stoppers facing the brackets attached to both ends of the inner cylinder are provided on both sides of the outer circumferential groove in the axial direction. Since a part is formed, an outer cylinder, sides, and stopper as in the conventional case are not required, the number of parts is reduced, and assembly to the bracket is facilitated. Furthermore, since an outer cylinder is not required, drawing processing is also not necessary. The anti-vibration rubber itself can also be made lighter than conventional rubber. Furthermore, since the bracket fitted into the outer groove is covered with a brim-shaped side stopper, it does not directly collide with other brackets, and the side stopper made of rubber collides with other brackets, creating a buffering effect and suppressing collision noise. At the same time, since there is no collision between metal fittings, no damage occurs.

さらに、ゴムのボリュームをアップさせることができ、
外筒がないために荷重を受けたときにゴムの破損も生ぜ
ず、耐久性も向上する。Furthermore, the volume of the rubber can be increased,
Since there is no outer cylinder, the rubber does not break when subjected to load, improving durability.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの発明の第１実施例を示す断面図、第２図は
第２実施例を示す断面図、第３図は第２図の側面図、第
４図は外周溝にストッパを嵌め込んだ状態の断面図、第
５図は第３実施例を示す断面図、第６図は第４実施例を
示す断面図、第７図はこの発明の筒形防振ゴムの荷重と
撓み量との関係を示すグラフ、第８図は従来例を示す断
面図、第９図は従来例における荷重と撓み量の関係を示
すグラフである。 １・・・内筒、　　　　　２・・・ゴム、３・・・外周
溝、　　　　４・・・サイドストッパ部、１０．２０・
・・ブラケット。Fig. 1 is a sectional view showing a first embodiment of the invention, Fig. 2 is a sectional view showing a second embodiment, Fig. 3 is a side view of Fig. 2, and Fig. 4 shows a stopper fitted in the outer circumferential groove. 5 is a sectional view showing the third embodiment, FIG. 6 is a sectional view showing the fourth embodiment, and FIG. 7 is a load and deflection amount of the cylindrical vibration isolating rubber of the present invention. FIG. 8 is a sectional view showing the conventional example, and FIG. 9 is a graph showing the relationship between the load and the amount of deflection in the conventional example. DESCRIPTION OF SYMBOLS 1...Inner cylinder, 2...Rubber, 3...Outer circumferential groove, 4...Side stopper part, 10.20.
··bracket.

Claims (1)

【特許請求の範囲】 １、内筒の外周にゴムを有し、内筒両端とゴムの外周と
に夫々ブラケットが取付く筒形防振ゴムにおいて、 ゴムの外周にブラケットが嵌まり込む外周溝を形成する
とともにこの外周溝の軸線方向両側に内筒両端に取付く
ブラケットに対向する鍔状のサイドストッパ部を形成し
たことを特徴とする筒形防振ゴム。[Scope of Claims] 1. In a cylindrical anti-vibration rubber that has rubber on the outer periphery of the inner cylinder and brackets are attached to both ends of the inner cylinder and the outer periphery of the rubber, an outer periphery groove into which the brackets fit into the outer periphery of the rubber. A cylindrical anti-vibration rubber characterized in that a cylindrical anti-vibration rubber is formed with a side stopper portion formed on both sides of the outer circumferential groove in the axial direction to face a bracket attached to both ends of the inner cylinder.