JP2019027450A - Liquid sealed vibration control device - Google Patents

Liquid sealed vibration control device Download PDF

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JP2019027450A
JP2019027450A JP2017143833A JP2017143833A JP2019027450A JP 2019027450 A JP2019027450 A JP 2019027450A JP 2017143833 A JP2017143833 A JP 2017143833A JP 2017143833 A JP2017143833 A JP 2017143833A JP 2019027450 A JP2019027450 A JP 2019027450A
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pair
stopper member
cylinder
orifice
elastic
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達哉 大庭
Tatsuya Oba
達哉 大庭
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Abstract

To provide a liquid sealed vibration control device which enables improvement of flexibility of a shape of an orifice, a passage cross section, and so on.SOLUTION: An intermediate cylinder includes: a pair of cylindrical fitting peripheral walls which fit in an inner peripheral surface of an external cylinder; and a pair of connection walls which respectively connect the pair of fitting peripheral walls at the radial inner side of the fitting peripheral walls and with which axial partition walls are respectively connected. Each stopper member includes: a pair of contact parts which respectively contact with inner surfaces of the pair of connection walls; and restriction parts which restrict movement of the stopper member to the inner cylinder side. Each orifice includes: a first orifice formed between the connection wall and the external cylinder; and second orifices, each of which is formed between the stopper member and the external cylinder and communicates with the first orifice.SELECTED DRAWING: Figure 4

Description

本発明は、液封入式防振装置に関し、特にオリフィスの形状や流路断面積などの自由度を向上できる液封入式防振装置に関するものである。   The present invention relates to a liquid-filled vibration isolator, and more particularly to a liquid-filled vibration isolator that can improve the degree of freedom such as the shape of an orifice and the cross-sectional area of a flow path.

従来より、振動減衰や緩衝等を目的として、車輪やエンジン等の振動源と車体との連結部位に液封入式防振装置が配置される。液封入式防振装置としては、例えば、内筒と、外筒に固定される中間筒とをゴム状弾性体から構成される防振基体で連結し、防振基体の軸方向隔壁により内筒を挟んで相対する位置に区画されて一対の液室が形成され、その一対の液室をオリフィスで連通するものが知られている(特許文献1)。   Conventionally, a liquid-filled vibration isolator is disposed at a connection portion between a vibration source such as a wheel or an engine and a vehicle body for the purpose of vibration damping, buffering, or the like. As the liquid-filled vibration isolator, for example, an inner cylinder and an intermediate cylinder fixed to the outer cylinder are connected by a vibration isolating base composed of a rubber-like elastic body, and the inner cylinder is formed by an axial partition of the vibration isolating base. It is known that a pair of liquid chambers are formed at positions opposed to each other with a pair of liquid chambers, and the pair of liquid chambers communicate with each other through an orifice (Patent Document 1).

特許文献1に開示される技術では、外筒に対する内筒の相対移動を規制する一対の半円筒状のストッパ部材の周方向端部が、外筒と中間筒の連結壁との間にそれぞれ挿入されることで、軸方向隔壁に平行な方向にストッパ部材が位置決めされる。そして、一対の半円筒状のストッパ部材の周方向端部同士を、外筒と連結壁との間で接触させることで、軸方向隔壁に垂直な方向にストッパ部材が位置決めされる。   In the technique disclosed in Patent Document 1, the circumferential ends of a pair of semi-cylindrical stopper members that restrict relative movement of the inner cylinder with respect to the outer cylinder are inserted between the outer cylinder and the connecting wall of the intermediate cylinder, respectively. By doing so, the stopper member is positioned in a direction parallel to the axial partition. And the stopper member is positioned in the direction perpendicular | vertical to an axial partition by making the circumferential direction edge parts of a pair of semi-cylindrical stopper members contact between an outer cylinder and a connection wall.

特開2007−147056号公報JP 2007-147056 A

しかしながら、上記従来の技術では、外筒と連結壁との間という限られた空間内に挿入されたストッパ部材の外周面に形成される溝と、外筒の内周面と、の間にオリフィスが形成されるため、オリフィスの形状や流路断面積などに制約が生じる。上記従来の技術に対して、オリフィスの形状や流路断面積などの自由度を向上させたいという要求がある。   However, in the above conventional technique, an orifice is formed between the groove formed on the outer peripheral surface of the stopper member inserted in the limited space between the outer cylinder and the connecting wall and the inner peripheral surface of the outer cylinder. Therefore, there are restrictions on the shape of the orifice, the cross-sectional area of the flow path, and the like. There is a demand for improving the degree of freedom of the orifice shape and the cross-sectional area of the flow channel with respect to the conventional technology.

本発明は上述した要求に応えるためになされたものであり、オリフィスの形状や流路断面積などの自由度を向上できる液封入式防振装置を提供することを目的とする。   The present invention has been made to meet the above-described demand, and an object thereof is to provide a liquid-filled vibration isolator capable of improving the degree of freedom such as the shape of the orifice and the cross-sectional area of the flow path.

この目的を達成するために本発明の液封入式防振装置は、内筒と、前記内筒の外周側を取り囲む外筒と、前記外筒の内周面に嵌合する中間筒と、前記中間筒と前記内筒とを連結するゴム状弾性体から構成される防振基体と、前記防振基体の軸方向隔壁により前記内筒を挟んで相対する位置に区画される一対の液室と、一対の前記液室を連通するオリフィスと、一対の前記液室にそれぞれ配置されて前記内筒を挟んで互いに対向すると共に、前記外筒に対する前記内筒の相対移動を規制する一対のストッパ部材とを備え、前記中間筒は、前記外筒の内周面に嵌合する筒状の一対の嵌合周壁と、前記嵌合周壁よりも径方向内側で一対の前記嵌合周壁をそれぞれ連結すると共に、前記軸方向隔壁がそれぞれ連結される一対の連結壁とを備え、前記ストッパ部材は、一対の連結壁の内面にそれぞれ接触する一対の接触部と、前記内筒側への前記ストッパ部材の移動を規制する規制部とを備え、前記オリフィスは、前記連結壁と前記外筒との間に形成される第1オリフィスと、前記ストッパ部材と前記外筒との間に形成されて前記第1オリフィスに連通する第2オリフィスとを備える。   In order to achieve this object, a liquid-filled vibration isolator of the present invention includes an inner cylinder, an outer cylinder that surrounds the outer peripheral side of the inner cylinder, an intermediate cylinder that fits on the inner peripheral surface of the outer cylinder, A vibration-isolating base composed of a rubber-like elastic body that connects the intermediate cylinder and the inner cylinder, and a pair of liquid chambers that are partitioned by the axial partition of the vibration-isolating base to face each other across the inner cylinder An orifice communicating with the pair of liquid chambers, and a pair of stopper members disposed in the pair of liquid chambers, facing each other with the inner cylinder interposed therebetween, and restricting relative movement of the inner cylinder with respect to the outer cylinder And the intermediate cylinder connects the pair of cylindrical fitting peripheral walls fitted to the inner peripheral surface of the outer cylinder and the pair of fitting peripheral walls radially inward of the fitting peripheral wall. And a pair of connecting walls to which the axial partition walls are respectively connected, The upper member includes a pair of contact portions that respectively contact inner surfaces of the pair of connecting walls, and a restricting portion that restricts the movement of the stopper member toward the inner cylinder, and the orifice includes the connecting wall and the A first orifice formed between the outer cylinder and a second orifice formed between the stopper member and the outer cylinder and communicating with the first orifice.

請求項1記載の液封入式防振装置によれば、一対の連結壁の間にストッパ部材の一対の接触部を接触させることで、軸方向隔壁に平行な方向にストッパ部材を位置決めできる。内筒側へのストッパ部材の移動を規制する規制部により、軸方向隔壁に垂直な方向にストッパ部材を位置決めできる。このように、ストッパ部材の位置決めのために、連結壁と外筒との間にストッパ部材の一部を設けないようにできるので、連結壁と外筒との間に形成される第1オリフィスの形状や流路断面積などの自由度を向上できる。   According to the liquid-filled vibration isolator of claim 1, the stopper member can be positioned in a direction parallel to the axial partition by bringing the pair of contact portions of the stopper member into contact between the pair of connecting walls. The stopper member can be positioned in a direction perpendicular to the axial partition by the restricting portion that restricts the movement of the stopper member toward the inner cylinder. As described above, since the stopper member can be positioned so that a part of the stopper member is not provided between the connecting wall and the outer cylinder, the first orifice formed between the connecting wall and the outer cylinder is not provided. The degree of freedom such as the shape and cross-sectional area of the channel can be improved.

請求項2記載の液封入式防振装置によれば、無荷重状態においてストッパ部材と軸方向隔壁とが互いに離れるので、軸方向隔壁の変形がストッパ部材により妨げられることを抑制できる。さらに、規制部が連結壁の周方向端部に接触する部位なので、ストッパ部材が軸方向隔壁に接触せずとも、軸方向隔壁に垂直な方向にストッパ部材を位置決めできる。よって、請求項1の効果に加え、ストッパ部材を位置決めしつつ、軸方向隔壁の変形の自由度を確保できる。   According to the liquid-filled vibration isolator according to the second aspect, since the stopper member and the axial partition are separated from each other in a no-load state, the deformation of the axial partition can be prevented from being hindered by the stopper member. Furthermore, since the restricting portion is in contact with the circumferential end of the connecting wall, the stopper member can be positioned in a direction perpendicular to the axial partition even if the stopper member does not contact the axial partition. Therefore, in addition to the effect of the first aspect, the degree of freedom of deformation of the axial partition can be secured while positioning the stopper member.

請求項3記載の液封入式防振装置によれば、ストッパ部材の対向方向において、軸方向隔壁の寸法は、連結壁の寸法の1/2以下である。これにより、軸方向隔壁の両側における連結壁の寸法を確保できるので、連結壁と接触部との接触面積を確保できる。その結果、請求項1又は2の効果に加え、連結壁に対してストッパ部材を動き難くできる。   According to the liquid-filled type vibration isolator according to claim 3, the dimension of the axial partition wall is ½ or less of the dimension of the connecting wall in the opposing direction of the stopper member. Thereby, since the dimension of the connection wall in the both sides of an axial partition is securable, the contact area of a connection wall and a contact part is securable. As a result, in addition to the effect of the first or second aspect, the stopper member can be made difficult to move with respect to the connecting wall.

請求項4記載の液封入式防振装置によれば、連結壁の外周面に設けられるゴム状弾性体から構成される弾性壁部により第1オリフィスの壁面の一部が形成される。連結壁の形状や寸法などを変更することなく、弾性壁部の形状や寸法などを変更することで、第1オリフィスの形状や流路断面積を変更できる。その結果、請求項1から3のいずれかの効果に加え、連結壁を流用しつつ第1オリフィスの形状や流路断面積などの自由度を向上できる。   According to the liquid-filled type vibration damping device of the fourth aspect, a part of the wall surface of the first orifice is formed by the elastic wall portion formed of the rubber-like elastic body provided on the outer peripheral surface of the connecting wall. The shape of the first orifice and the cross-sectional area of the flow path can be changed by changing the shape and size of the elastic wall portion without changing the shape and size of the connecting wall. As a result, in addition to the effect of any one of claims 1 to 3, the degree of freedom such as the shape of the first orifice and the cross-sectional area of the flow path can be improved while diverting the connection wall.

本発明の第1実施の形態における液封入式防振装置の平面図である。It is a top view of the liquid filling type vibration isolator in 1st Embodiment of this invention. 液封入式防振装置の正面図である。It is a front view of a liquid enclosure type vibration isolator. 図1のIII−III線における液封入式防振装置の断面図である。FIG. 3 is a cross-sectional view of the liquid filled type vibration isolator taken along line III-III in FIG. 1. 図2のV−V線における液封入式防振装置の断面図である。FIG. 5 is a cross-sectional view of the liquid filled type vibration isolator taken along line VV in FIG. 2. ストッパ部材の斜視図である。It is a perspective view of a stopper member. ストッパ部材および加硫金型の断面図である。It is sectional drawing of a stopper member and a vulcanization mold. 第2実施の形態における液封入式防振装置の径方向断面図である。It is radial direction sectional drawing of the liquid filled type vibration isolator in 2nd Embodiment. 図7のVIII−VIII線における液封入式防振装置の断面図である。It is sectional drawing of the liquid filled type vibration isolator in the VIII-VIII line of FIG. ストッパ部材の斜視図である。It is a perspective view of a stopper member.

以下、本発明の好ましい実施の形態について、添付図面を参照して説明する。図1は液封入式防振装置1の平面図である。図2は液封入式防振装置1の正面図である。図1及び図2に示すように液封入式防振装置1は、円筒状に形成された内筒10と、内筒10の外周側を同心状に取り囲む円筒状の外筒20と、外筒20と内筒10との間に介設される防振基体40とを主に備えている。以下、本実施の形態では、内筒10の軸心O方向を軸方向と称し、内筒10の軸心Oに垂直な方向を径方向(軸直角方向)と称して、内筒10の周方向を単に周方向と称して説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of a liquid-filled vibration isolator 1. FIG. 2 is a front view of the liquid-filled vibration isolator 1. As shown in FIGS. 1 and 2, the liquid-filled vibration isolator 1 includes a cylindrical inner cylinder 10, a cylindrical outer cylinder 20 that concentrically surrounds the outer periphery of the inner cylinder 10, and an outer cylinder. 20 and a vibration-proof base 40 interposed between the inner cylinder 10 and the inner cylinder 10 are mainly provided. Hereinafter, in the present embodiment, the direction of the axis O of the inner cylinder 10 is referred to as the axial direction, and the direction perpendicular to the axis O of the inner cylinder 10 is referred to as the radial direction (perpendicular direction). The direction will be described simply as the circumferential direction.

図3は図1のIII−III線における液封入式防振装置1の断面図である。図4は図2のIV−IV線における液封入式防振装置1の断面図である。図3に示すように、内筒10は、金属や合成樹脂等の剛性材料から構成される部材である。内筒10は、円筒状に形成された筒部11と、筒部11の軸方向中央から径方向外側に向かって略球状に膨出する第1膨出部12と、筒部11の軸方向両端側の外周面から径方向外側に向かって膨出する第2膨出部13とを備える。   3 is a cross-sectional view of the liquid-filled vibration isolator 1 along the line III-III in FIG. 4 is a cross-sectional view of the liquid-filled vibration isolator 1 taken along the line IV-IV in FIG. As shown in FIG. 3, the inner cylinder 10 is a member made of a rigid material such as metal or synthetic resin. The inner cylinder 10 includes a cylindrical portion 11 formed in a cylindrical shape, a first bulging portion 12 that bulges in a substantially spherical shape from the axial center of the cylindrical portion 11 toward the radially outer side, and the axial direction of the cylindrical portion 11. And a second bulging portion 13 that bulges radially outward from the outer peripheral surfaces on both ends.

外筒20は、円筒状に形成された金属材料から構成される筒部21と、筒部21の内周面に加硫接着されると共にゴム状弾性体から構成されるゴム膜22とを備える。外筒20の内周面には、円筒状の中間筒30が嵌合する。外筒20の軸方向端部を縮径させることで、外筒20の内周面に嵌合した中間筒30の軸方向の移動が規制され、中間筒30が外筒20に固定される。   The outer cylinder 20 includes a cylindrical portion 21 made of a metal material formed in a cylindrical shape, and a rubber film 22 that is vulcanized and bonded to the inner peripheral surface of the cylindrical portion 21 and is made of a rubber-like elastic body. . A cylindrical intermediate cylinder 30 is fitted to the inner peripheral surface of the outer cylinder 20. By reducing the diameter of the axial end of the outer cylinder 20, the axial movement of the intermediate cylinder 30 fitted to the inner peripheral surface of the outer cylinder 20 is restricted, and the intermediate cylinder 30 is fixed to the outer cylinder 20.

中間筒30は、外筒20の内周面に嵌合する一対の円環状の嵌合周壁31と、一対の嵌合周壁31同士を連結する連結壁32とを備える。嵌合周壁31は、金属や合成樹脂等の剛性材料から構成される。一対の嵌合周壁31は、外筒20の内周面の軸方向両端側にそれぞれ外周面が嵌合される。連結壁32は、嵌合周壁31よりも径方向内側に位置する。なお、中間筒30は外筒20に固定される部材なので、中間筒30を外筒20の一部としても良い。   The intermediate cylinder 30 includes a pair of annular fitting peripheral walls 31 that are fitted to the inner peripheral surface of the outer cylinder 20 and a connecting wall 32 that connects the pair of fitting peripheral walls 31 to each other. The fitting peripheral wall 31 is made of a rigid material such as metal or synthetic resin. The pair of fitting peripheral walls 31 are fitted with outer peripheral surfaces at both axial ends of the inner peripheral surface of the outer cylinder 20. The connecting wall 32 is located on the radially inner side of the fitting peripheral wall 31. Since the intermediate cylinder 30 is a member fixed to the outer cylinder 20, the intermediate cylinder 30 may be a part of the outer cylinder 20.

防振基体40は、内筒10と中間筒30とを連結すると共にゴム状弾性体から構成される部材である。防振基体40は、内筒10及び中間筒30の軸方向両側に円環状に形成される一対の径方向隔壁41と、一対の径方向隔壁41間に形成されて第1膨出部12を覆うゴム膜部42と、径方向隔壁41間であって内筒10と中間筒30との間に形成される軸方向隔壁43とを備える。   The anti-vibration base 40 is a member that connects the inner cylinder 10 and the intermediate cylinder 30 and is formed of a rubber-like elastic body. The anti-vibration base body 40 is formed between a pair of radial partition walls 41 formed in an annular shape on both axial sides of the inner cylinder 10 and the intermediate cylinder 30, and between the pair of radial partition walls 41, and the first bulging portion 12 is formed. The rubber film part 42 to cover and the axial partition wall 43 formed between the inner cylinder 10 and the intermediate cylinder 30 between the radial partition walls 41 are provided.

径方向隔壁41、ゴム膜部42及び軸方向隔壁43は一体に加硫成形される。径方向隔壁41、ゴム膜部42及び軸方向隔壁43の内周は内筒10(筒部11及び第1膨出部12)の外周面に加硫接着される。   The radial partition 41, the rubber film portion 42, and the axial partition 43 are integrally vulcanized. The inner peripheries of the radial partition 41, the rubber film portion 42, and the axial partition 43 are vulcanized and bonded to the outer peripheral surface of the inner cylinder 10 (the cylinder 11 and the first bulging portion 12).

一対の径方向隔壁41の外周は、一対の嵌合周壁31の内周にそれぞれ加硫接着される。一対の径方向隔壁41によって内筒10と外筒20との間の軸方向両端が閉鎖されることにより、液室71,72(図4参照)が形成される。液室71,72にはエチレングリコール等の不凍液(液体)が封入される。   The outer periphery of the pair of radial partition walls 41 is vulcanized and bonded to the inner periphery of the pair of fitting peripheral walls 31. Liquid chambers 71 and 72 (see FIG. 4) are formed by closing both ends in the axial direction between the inner cylinder 10 and the outer cylinder 20 by the pair of radial partition walls 41. The liquid chambers 71 and 72 are filled with an antifreeze liquid (liquid) such as ethylene glycol.

軸方向隔壁43の外周面は、連結壁32の内周面に加硫接着される。また、連結壁32の外周面の軸方向両側には、径方向隔壁41や軸方向隔壁43と一体に加硫成形される一対の弾性壁部45が加硫接着される。弾性壁部45の径方向外側の外面は、外筒20のゴム膜22の内周面に接触する。   The outer peripheral surface of the axial partition wall 43 is vulcanized and bonded to the inner peripheral surface of the connecting wall 32. A pair of elastic wall portions 45 vulcanized and formed integrally with the radial partition wall 41 and the axial partition wall 43 are vulcanized and bonded to both axial sides of the outer peripheral surface of the connecting wall 32. The outer surface on the radially outer side of the elastic wall portion 45 is in contact with the inner peripheral surface of the rubber film 22 of the outer cylinder 20.

図3及び図4に示すように、内筒10を挟んで相対する位置に一対の連結壁32及び一対の軸方向隔壁43が対称に設けられる。これにより、液室71,72は、軸方向隔壁43により周方向に区画される。そして、内筒10を挟んで相対する略対称な2つの液室71,72が形成される。なお、軸心Oと直交すると共に軸方向隔壁43が延設される方向(図4上下方向)をX方向とし、軸心O及びX方向と直交する方向(図4左右方向)をY方向とする。   As shown in FIGS. 3 and 4, a pair of connecting walls 32 and a pair of axial partition walls 43 are provided symmetrically at positions facing each other across the inner cylinder 10. Thereby, the liquid chambers 71 and 72 are partitioned in the circumferential direction by the axial partition wall 43. Then, two substantially symmetrical liquid chambers 71 and 72 facing each other with the inner cylinder 10 interposed therebetween are formed. The direction perpendicular to the axis O and the axial partition wall 43 is extended (the vertical direction in FIG. 4) is the X direction, and the direction orthogonal to the axial center O and the X direction (the left-right direction in FIG. 4) is the Y direction. To do.

液封入式防振装置1には、外筒20に対する内筒10の相対移動を規制する2つのストッパ部材50が液室71,72内にそれぞれ配置され、液室71,72を連通するオリフィス73が設けられる。一対のストッパ部材50は、内筒10を挟んで互いに対向する。   In the liquid-filled vibration isolator 1, two stopper members 50 that restrict the relative movement of the inner cylinder 10 with respect to the outer cylinder 20 are disposed in the liquid chambers 71 and 72, respectively, and an orifice 73 that communicates with the liquid chambers 71 and 72. Is provided. The pair of stopper members 50 oppose each other across the inner cylinder 10.

図5及び図6を参照してストッパ部材50について説明する。図5は、ストッパ部材50の斜視図である。図6は、ストッパ部材50及び加硫金型80の断面図である。なお、図6にはストッパ部材50の径方向断面が図示される。図5に示すように、ストッパ部材50は、略半円筒状の部材であり、自身の周方向中央および軸方向中央に関して対称に形成されている。   The stopper member 50 is demonstrated with reference to FIG.5 and FIG.6. FIG. 5 is a perspective view of the stopper member 50. FIG. 6 is a cross-sectional view of the stopper member 50 and the vulcanization mold 80. FIG. 6 shows a radial cross section of the stopper member 50. As shown in FIG. 5, the stopper member 50 is a substantially semi-cylindrical member, and is formed symmetrically with respect to the center in the circumferential direction and the center in the axial direction.

ストッパ部材50の外周面は、周方向中央に設けられる円弧形状の円弧面部50aと、円弧面部50aの周方向両側にそれぞれ連なる凹面部50bと、凹面部50bの周方向先端側に形成される溝部50cとを備える。円弧面部50aは、外筒20の内周面に面接触する部位である(図4参照)。凹面部50bは、円弧面部50aに対して径方向内側に凹んだ部位である。溝部50cは、凹面部50bの一部の軸方向中央を径方向に凹ませた部位であり、ストッパ部材50の外周面の周方向先端まで設けられる。   The outer peripheral surface of the stopper member 50 includes an arc-shaped arc surface portion 50a provided at the center in the circumferential direction, a concave surface portion 50b continuous to both sides in the circumferential direction of the arc surface portion 50a, and a groove portion formed on the distal end side in the circumferential direction of the concave surface portion 50b. 50c. The circular arc surface portion 50a is a portion that is in surface contact with the inner peripheral surface of the outer cylinder 20 (see FIG. 4). The concave surface portion 50b is a portion that is recessed radially inward with respect to the circular arc surface portion 50a. The groove part 50c is a part where the axial center of a part of the concave part 50b is recessed in the radial direction, and is provided to the distal end in the circumferential direction of the outer peripheral surface of the stopper member 50.

ストッパ部材50は、ストッパ部材50の周方向端部にそれぞれ設けられてY方向に突出する一対の接触部51と、ストッパ部材50の周方向端部にそれぞれ設けられてX方向に突出する一対の規制部52とを備える。接触部51と規制部52とは、互いに隣り合う面が直角に形成される。   The stopper member 50 is provided at a circumferential end of the stopper member 50 and protrudes in the Y direction, and a pair of contact portions 51 is provided at the circumferential end of the stopper member 50 and protrudes in the X direction. And a restriction unit 52. As for the contact part 51 and the control part 52, the mutually adjacent surfaces are formed at right angles.

ストッパ部材50は、金属や合成樹脂等から構成されて所定の剛性を有する剛体部53に、ゴム状弾性体から構成される弾性部60を加硫接着して形成される。剛体部53の略全面が弾性部60で覆われ、接触部51及び規制部52の一部で剛体部53が外部に露出している。この露出した部分が、弾性部60の加硫成形時に加硫金型80(図6参照)に固定される。   The stopper member 50 is formed by vulcanizing and bonding an elastic portion 60 made of a rubber-like elastic body to a rigid portion 53 made of metal, synthetic resin or the like and having a predetermined rigidity. The substantially entire surface of the rigid body portion 53 is covered with the elastic portion 60, and the rigid body portion 53 is exposed to the outside at a part of the contact portion 51 and the regulating portion 52. This exposed portion is fixed to the vulcanization mold 80 (see FIG. 6) when the elastic portion 60 is vulcanized.

図6に示すように、剛体部53は、ストッパ部材50の外形を主に規定する略半円筒状の部材である。剛体部53は、剛体部53の内周面である内面54と、内面54に連なる外面55と、内面54及び外面55に開口する貫通孔56とを備える。   As shown in FIG. 6, the rigid portion 53 is a substantially semi-cylindrical member that mainly defines the outer shape of the stopper member 50. The rigid body portion 53 includes an inner surface 54 that is an inner peripheral surface of the rigid body portion 53, an outer surface 55 that continues to the inner surface 54, and a through hole 56 that opens to the inner surface 54 and the outer surface 55.

内面54は、内面54の軸方向中央および周方向中央(貫通孔56)に向かって凹む凹部54aを備える。凹部54aは、周方向の両側に対して中央をY方向に凹ませた部位である。凹部54aは、内面54の軸方向の略全体に亘って設けられる。   The inner surface 54 includes a recess 54 a that is recessed toward the axial center and the circumferential center (through hole 56) of the inner surface 54. The recessed part 54a is a part where the center is recessed in the Y direction with respect to both sides in the circumferential direction. The concave portion 54 a is provided over substantially the entire axial direction of the inner surface 54.

外面55は、内面54以外の剛体部53の外形を規定する面である。即ち、外面55は、剛体部53の外周面と、剛体部53の軸方向端面とから構成される。貫通孔56は、剛体部53の周方向中央および軸方向中央を貫通する部分である。即ち、貫通孔56は、剛体部53をY方向に貫通して形成される。   The outer surface 55 is a surface that defines the outer shape of the rigid portion 53 other than the inner surface 54. That is, the outer surface 55 is composed of the outer peripheral surface of the rigid body portion 53 and the axial end surface of the rigid body portion 53. The through hole 56 is a portion that penetrates the circumferential center and the axial center of the rigid body portion 53. That is, the through hole 56 is formed so as to penetrate the rigid body portion 53 in the Y direction.

弾性部60は、剛体部53の表面(内面54及び外面55)を覆うゴム状弾性体である。弾性部60は、凹部54aに加硫接着される弾性ストッパ部61と、貫通孔56の内部に充填される充填部62と、弾性ストッパ部61及び充填部62に連なる薄い膜状のゴム膜部63とを備える。弾性ストッパ部61、充填部62及びゴム膜部63は、一体に加硫成形されて互いに連なる。   The elastic portion 60 is a rubber-like elastic body that covers the surface (the inner surface 54 and the outer surface 55) of the rigid portion 53. The elastic portion 60 includes an elastic stopper portion 61 that is vulcanized and bonded to the concave portion 54 a, a filling portion 62 that is filled in the through hole 56, and a thin film-like rubber film portion that is continuous with the elastic stopper portion 61 and the filling portion 62. 63. The elastic stopper portion 61, the filling portion 62, and the rubber film portion 63 are integrally vulcanized and connected to each other.

弾性ストッパ部61は、ストッパ部材50の内周面のうちで径方向内側へ最も張り出す部分である。そのため、外筒20(図3,4参照)に対して内筒10(図3,4参照)がY方向に相対移動するとき、ストッパ部材50のうち弾性ストッパ部61が内筒10と先に接触する。   The elastic stopper portion 61 is a portion of the inner peripheral surface of the stopper member 50 that protrudes most radially inward. Therefore, when the inner cylinder 10 (refer to FIGS. 3 and 4) moves relative to the outer cylinder 20 (refer to FIGS. 3 and 4) in the Y direction, the elastic stopper portion 61 of the stopper member 50 is moved forward from the inner cylinder 10. Contact.

また、凹部54aに弾性ストッパ部61が設けられるので、弾性ストッパ部61の厚さ(Y方向寸法)を確保できる。この弾性ストッパ部61の厚さによって、内筒10に押されたときの弾性ストッパ部61の弾性力が異なり、ストッパ部材50の荷重−たわみ特性が変わる。   Moreover, since the elastic stopper part 61 is provided in the recessed part 54a, the thickness (Y direction dimension) of the elastic stopper part 61 is securable. Depending on the thickness of the elastic stopper portion 61, the elastic force of the elastic stopper portion 61 when pressed by the inner cylinder 10 is different, and the load-deflection characteristic of the stopper member 50 is changed.

ストッパ部材50は、加硫金型80に剛体部53をセットした状態で弾性部60を加硫成形することで製造される。加硫金型80は、上型81と、上型81が重ねられる下型82とを備える。上型81と下型82との間には、ストッパ部材50の外形形状と同一の空間であるキャビティ83が設けられる。上型81の中央には、キャビティ83に連通する注入孔84が設けられる。注入孔84は、その先端(キャビティ83との境界部分)に通路断面積が狭いゲート85を備える。   The stopper member 50 is manufactured by vulcanizing and molding the elastic portion 60 in a state where the rigid body portion 53 is set in the vulcanization mold 80. The vulcanization mold 80 includes an upper mold 81 and a lower mold 82 on which the upper mold 81 is stacked. A cavity 83 that is the same space as the outer shape of the stopper member 50 is provided between the upper mold 81 and the lower mold 82. An injection hole 84 that communicates with the cavity 83 is provided in the center of the upper mold 81. The injection hole 84 includes a gate 85 having a narrow passage cross-sectional area at the tip (a boundary portion with the cavity 83).

ストッパ部材50を製造するには、まず、キャビティ83内に剛体部53を配置し固定する。次いで、注入孔84からキャビティ83内にゴム状弾性体の成形材料を注入する。剛体部53が配置されたキャビティ83内に成形材料を充填した後、成形材料を加硫成形することで、弾性部60が加硫成形されつつ、剛体部53に弾性部60が加硫接着される。最後に、上型81と下型82とを開き、通路断面積が狭いゲート85の位置でゴム状弾性体を切り離すことで、ストッパ部材50が得られる。   In order to manufacture the stopper member 50, first, the rigid body portion 53 is disposed and fixed in the cavity 83. Next, a rubber-like elastic molding material is injected into the cavity 83 from the injection hole 84. After the molding material is filled in the cavity 83 in which the rigid body portion 53 is disposed, the elastic material 60 is vulcanized and molded, and the elastic portion 60 is vulcanized and bonded to the rigid body portion 53 while the elastic material 60 is vulcanized. The Finally, the upper die 81 and the lower die 82 are opened, and the rubber-like elastic body is cut off at the position of the gate 85 where the passage cross-sectional area is narrow, whereby the stopper member 50 is obtained.

この切り離した部分が、加硫成形時に注入孔84が接続されていたゴム状弾性体の注入跡部64である。注入孔84が剛体部53の外面55側に位置するので、弾性部60には剛体部53の外面55側に注入跡部64が設けられる。貫通孔56の軸心上に注入孔84が位置する(充填部62の外筒20側の端面に注入跡部64が位置する)ので、成形材料の充填量が多くなる弾性ストッパ部61及び充填部62部分のキャビティ83に成形材料を充填し易くできる。その結果、弾性部60の形成を容易にできる。   This separated portion is a rubber-like elastic injection trace portion 64 to which the injection hole 84 was connected during vulcanization molding. Since the injection hole 84 is located on the outer surface 55 side of the rigid portion 53, the elastic portion 60 is provided with an injection trace portion 64 on the outer surface 55 side of the rigid portion 53. Since the injection hole 84 is located on the axial center of the through hole 56 (the injection trace part 64 is located on the end surface of the filling part 62 on the outer cylinder 20 side), the elastic stopper part 61 and the filling part that increase the filling amount of the molding material The 62-part cavity 83 can be easily filled with the molding material. As a result, the elastic part 60 can be easily formed.

図3及び図4に戻って、液封入式防振装置1の組立方法について説明する。まず金型(図示せず)に内筒10と中間筒30とをセットし、防振基体40を加硫成形すると共に、内筒10及び中間筒30に防振基体40を加硫接着する。次いで、その加硫成形品の一対の連結壁32の間に一対のストッパ部材50をそれぞれ嵌める。ストッパ部材50を嵌めた加硫成形品および外筒20を液体に沈め、中間筒30を外筒20の内周面に嵌める。最後に、外筒20を絞り加工し、外筒20の軸方向端部をかしめて外筒20に中間筒30を固定することで、液封入式防振装置1が得られる。なお、液室71,72に液体を充填する方法は、ストッパ部材50を嵌めた加硫成形品および外筒20を液体に沈めて組み立てる場合に限らない。例えば、外筒20に穴をあけ、その穴から液体を注入した後に、穴をブラインドリベット等で塞ぐことで、液室71,72に液体を充填しても良い。   Returning to FIG. 3 and FIG. 4, the assembly method of the liquid-filled vibration isolator 1 will be described. First, the inner cylinder 10 and the intermediate cylinder 30 are set in a mold (not shown), the vibration-proof base 40 is vulcanized, and the vibration-proof base 40 is vulcanized and bonded to the inner cylinder 10 and the intermediate cylinder 30. Next, a pair of stopper members 50 are fitted between the pair of connecting walls 32 of the vulcanized product. The vulcanized product and the outer cylinder 20 fitted with the stopper member 50 are submerged in the liquid, and the intermediate cylinder 30 is fitted to the inner peripheral surface of the outer cylinder 20. Finally, the outer cylinder 20 is drawn, and the axial end of the outer cylinder 20 is crimped to fix the intermediate cylinder 30 to the outer cylinder 20, whereby the liquid-filled vibration isolator 1 is obtained. In addition, the method of filling the liquid chambers 71 and 72 with the liquid is not limited to the case where the vulcanized molded product fitted with the stopper member 50 and the outer cylinder 20 are submerged and assembled. For example, the liquid chambers 71 and 72 may be filled with a liquid by making a hole in the outer cylinder 20 and injecting the liquid from the hole and then closing the hole with a blind rivet or the like.

液室71,72内に配置されたストッパ部材50について説明する。一対のストッパ部材50は、内筒10と間隔をあけて液室71,72内にそれぞれ配置される。ストッパ部材50の一対の接触部51を一対の連結壁32の内面にそれぞれ接触させ、一対の規制部52を一対の連結壁32の周方向端部に接触させ、円弧面部50aを外筒20の内周面に接触させることで、ストッパ部材50が中間筒30及び外筒20に固定される。   The stopper member 50 disposed in the liquid chambers 71 and 72 will be described. The pair of stopper members 50 are respectively disposed in the liquid chambers 71 and 72 with a space from the inner cylinder 10. The pair of contact portions 51 of the stopper member 50 are brought into contact with the inner surfaces of the pair of connecting walls 32, the pair of restricting portions 52 are brought into contact with the circumferential ends of the pair of connecting walls 32, and the arcuate surface portion 50 a is connected to the outer cylinder 20. The stopper member 50 is fixed to the intermediate cylinder 30 and the outer cylinder 20 by being brought into contact with the inner peripheral surface.

詳しくは、一対の接触部51が一対の連結壁32にそれぞれ接触することで、連結壁32に対してX方向にストッパ部材50が位置決めされる。そして、連結壁32の周方向端部に規制部52が接触しつつ、円弧面部50aが外筒20の外周面に接触することで、連結壁32に対してY方向にストッパ部材50が位置決めされる。このように、ストッパ部材50が中間筒30の一対の連結壁32の間に嵌められて、ストッパ部材50が中間筒30及び外筒20に固定される。   Specifically, the stopper member 50 is positioned in the X direction with respect to the connecting wall 32 by the pair of contact portions 51 coming into contact with the pair of connecting walls 32. The stopper member 50 is positioned in the Y direction with respect to the connecting wall 32 by the arcuate surface portion 50 a contacting the outer peripheral surface of the outer cylinder 20 while the restricting portion 52 is in contact with the circumferential end of the connecting wall 32. The Thus, the stopper member 50 is fitted between the pair of connecting walls 32 of the intermediate cylinder 30, and the stopper member 50 is fixed to the intermediate cylinder 30 and the outer cylinder 20.

なお、規制部52は、内筒10側へのストッパ部材50の移動を規制する部位であれば、連結壁32の周方向端部に接触する部位でなくても良い。例えば、規制部52を省略する代わりに、接触部51の先端を軸方向隔壁43に接触するように形成し、その接触部51の先端を規制部としても良い。この場合、軸方向隔壁43の変形を規制部(接触部51の先端)により規制できるので、外筒20に対する内筒10の相対移動を規制部により調整できる。   The restricting portion 52 may not be a portion that contacts the circumferential end portion of the connecting wall 32 as long as it is a portion that restricts the movement of the stopper member 50 toward the inner cylinder 10. For example, instead of omitting the restricting portion 52, the tip of the contact portion 51 may be formed so as to contact the axial partition wall 43, and the tip of the contact portion 51 may be used as the restricting portion. In this case, since the deformation of the axial partition wall 43 can be regulated by the regulating part (the tip of the contact part 51), the relative movement of the inner cylinder 10 with respect to the outer cylinder 20 can be adjusted by the regulating part.

これに対して本実施の形態では、規制部52が連結壁32の周方向端部に接触する部位なので、ストッパ部材50を軸方向隔壁43に接触させずとも、ストッパ部材50の内筒10側への移動を規制部52及び連結壁32により規制できる。そのため、ストッパ部材50(接触部51)を軸方向隔壁43と非接触にできる。よって、ストッパ部材50を位置決めしつつ、ストッパ部材50と軸方向隔壁43との非接触により軸方向隔壁43の変形の自由度を確保できる。   On the other hand, in the present embodiment, since the restricting portion 52 is in contact with the circumferential end of the connecting wall 32, the stopper member 50 is not brought into contact with the axial partition wall 43, and the stopper member 50 is on the inner cylinder 10 side. Can be restricted by the restricting portion 52 and the connecting wall 32. Therefore, the stopper member 50 (contact portion 51) can be brought out of contact with the axial partition wall 43. Therefore, it is possible to secure the degree of freedom of deformation of the axial partition wall 43 by positioning the stopper member 50 without contact between the stopper member 50 and the axial partition wall 43.

ストッパ部材50の凹面部50bにより、外筒20とストッパ部材50との間の空間を大きくできるので、液室71,72を大きくできる。ゴム膜部63の膜厚は、連結壁32の本体部32aよりも薄く形成される。ストッパ部材50の接触部51及び規制部52にゴム膜部63が設けられているので、接触部51及び規制部52における剛体部53と連結壁32との間で圧縮される弾性部60を薄くできる。これにより、連結壁32に対してストッパ部材50を動き難くできる。   Since the space between the outer cylinder 20 and the stopper member 50 can be increased by the concave surface portion 50b of the stopper member 50, the liquid chambers 71 and 72 can be increased. The film thickness of the rubber film part 63 is formed thinner than the main body part 32 a of the connecting wall 32. Since the rubber film portion 63 is provided on the contact portion 51 and the restriction portion 52 of the stopper member 50, the elastic portion 60 compressed between the rigid body portion 53 and the connecting wall 32 in the contact portion 51 and the restriction portion 52 is thinned. it can. Thereby, it is possible to make the stopper member 50 difficult to move with respect to the connecting wall 32.

一対の接触部51を一対の連結壁32の間にY方向に挿入して、ストッパ部材50を連結壁32の間に嵌めるので、挿入作業性を確保するため、一対の接触部51の連結壁32に接触する面がY方向に平坦に形成されることが好ましい。また、接触部51と連結壁32との接触面積を確保して、連結壁32に対してストッパ部材50を動き難くするため、接触部51が接触する連結壁32の内面もY方向に平坦に形成されることが好ましい。   Since the pair of contact portions 51 are inserted in the Y direction between the pair of connecting walls 32 and the stopper member 50 is fitted between the connecting walls 32, the connecting walls of the pair of contact portions 51 are secured in order to ensure insertion workability. The surface in contact with 32 is preferably formed flat in the Y direction. Moreover, in order to secure the contact area of the contact part 51 and the connection wall 32, and to make it difficult to move the stopper member 50 with respect to the connection wall 32, the inner surface of the connection wall 32 which the contact part 51 contacts is also flat in the Y direction. Preferably it is formed.

但し、連結壁32は、円環状の嵌合周壁31を連結するものなので、連結壁32を形成し易くするため、円弧状に形成されることが好ましい。そこで、本実施の形態における連結壁32は、剛性材料から構成される嵌合周壁31と一体成形される本体部32aと、本体部32aの内周面に加硫接着されるゴム状弾性体から構成されるゴム部32bとを備える。   However, since the connecting wall 32 connects the annular fitting peripheral wall 31, it is preferable that the connecting wall 32 is formed in an arc shape so that the connecting wall 32 can be easily formed. Therefore, the connecting wall 32 in the present embodiment is composed of a main body 32a integrally formed with the fitting peripheral wall 31 made of a rigid material, and a rubber-like elastic body vulcanized and bonded to the inner peripheral surface of the main body 32a. The rubber part 32b comprised is provided.

本体部32aの径方向断面は、嵌合周壁31の軸心(内筒10の軸心O)を中心とした円弧状に形成される。ゴム部32bは、軸方向隔壁43と一体成形され、接触部51側の面がY方向に平坦に形成される。よって、円環状の嵌合周壁31を連結する連結壁32を本体部32aにより形成し易くしつつ、ゴム部32bによる連結壁32と接触部51との接触面積の確保によって連結壁32に対してストッパ部材50を動き難くできる。   A cross section in the radial direction of the main body 32 a is formed in an arc shape centered on the axis of the fitting peripheral wall 31 (the axis O of the inner cylinder 10). The rubber part 32b is integrally formed with the axial partition wall 43, and the surface on the contact part 51 side is formed flat in the Y direction. Therefore, the connecting wall 32 that connects the annular fitting peripheral wall 31 is easily formed by the main body portion 32a, and the contact area between the connecting wall 32 and the contact portion 51 by the rubber portion 32b is secured to the connecting wall 32. The stopper member 50 can be made difficult to move.

一対のストッパ部材50の対向方向(X方向)において、軸方向隔壁43の寸法L1が連結壁32の寸法L2の1/2以下に設定される。これにより、軸方向隔壁43の両側における連結壁32(ゴム部32b)のX方向の寸法を確保できる。さらに、接触部51と軸方向隔壁43とを接触させずに、接触部51のX方向の寸法を確保できる。その結果、連結壁32と接触部51との接触面積を確保できるので、連結壁32に対してストッパ部材50をより動き難くできる。   In the facing direction (X direction) of the pair of stopper members 50, the dimension L 1 of the axial partition wall 43 is set to ½ or less of the dimension L 2 of the connecting wall 32. Thereby, the dimension of the X direction of the connection wall 32 (rubber part 32b) in the both sides of the axial direction partition 43 is securable. Furthermore, the dimension of the X direction of the contact part 51 is securable without making the contact part 51 and the axial direction partition 43 contact. As a result, the contact area between the connecting wall 32 and the contact portion 51 can be secured, and the stopper member 50 can be made more difficult to move with respect to the connecting wall 32.

液封入式防振装置1は、Y方向の荷重(以下「主入力荷重」と称す)が入力されると、軸方向隔壁43が弾性変形して内筒10と外筒20とが相対変位する。ストッパ部材50の内面54と内筒10との間に弾性ストッパ部61が位置し、無荷重状態における内筒10と弾性ストッパ部61との距離がストッパ部材50のうちで最短となる。そのため、外筒20に対して内筒10がY方向に相対移動するとき、ストッパ部材50のうち弾性ストッパ部61が内筒10と先に接触する。弾性ストッパ部61が所定量圧縮された後に、内面54に加硫接着されたゴム膜部63が内筒10に接触し、ゴム膜部63が僅かに圧縮されて、内筒10が外筒20に最も近づく。このように、外筒20に対する内筒10の相対変位がストッパ部材50によって規制される。   In the liquid-filled vibration isolator 1, when a load in the Y direction (hereinafter referred to as “main input load”) is input, the axial partition wall 43 is elastically deformed and the inner cylinder 10 and the outer cylinder 20 are relatively displaced. . The elastic stopper 61 is located between the inner surface 54 of the stopper member 50 and the inner cylinder 10, and the distance between the inner cylinder 10 and the elastic stopper 61 in the no-load state is the shortest among the stopper members 50. Therefore, when the inner cylinder 10 moves relative to the outer cylinder 20 in the Y direction, the elastic stopper portion 61 of the stopper member 50 comes into contact with the inner cylinder 10 first. After the elastic stopper portion 61 is compressed by a predetermined amount, the rubber film portion 63 vulcanized and bonded to the inner surface 54 comes into contact with the inner cylinder 10, the rubber film portion 63 is slightly compressed, and the inner cylinder 10 becomes the outer cylinder 20. Closest to. Thus, the relative displacement of the inner cylinder 10 with respect to the outer cylinder 20 is restricted by the stopper member 50.

軸心Oとの直交位置に貫通孔56及び充填部62が配置されつつ、貫通孔56及び充填部62が軸方向隔壁43と垂直に配置される。これにより、外筒20に対する内筒10の軸直角方向(径方向)への相対移動時に、内筒10の移動を規制した弾性ストッパ部61が内筒10から受ける軸直角方向の荷重を充填部62により吸収できる。その結果、貫通孔56(充填部62)の大きさに応じてストッパ部材50の荷重−たわみ特性を変更できる。   The through hole 56 and the filling portion 62 are arranged perpendicular to the axial partition wall 43 while the through hole 56 and the filling portion 62 are arranged at a position orthogonal to the axis O. As a result, when the inner cylinder 10 is moved relative to the outer cylinder 20 in the direction perpendicular to the axis (radial direction), the filling portion receives the load in the axis perpendicular direction that the elastic stopper 61 that restricts the movement of the inner cylinder 10 receives from the inner cylinder 10. 62 can be absorbed. As a result, the load-deflection characteristic of the stopper member 50 can be changed according to the size of the through hole 56 (filling portion 62).

貫通孔56へ向かって凹む凹部54aに弾性ストッパ部61が加硫接着されるので、内筒10からの荷重による弾性ストッパ部61の変形を、凹部54aに沿って貫通孔56内の充填部62に伝え易くできる。その結果、弾性ストッパ部61の変形を凹部54aに沿って充填部62で吸収し易くできるので、貫通孔56(充填部62)の大きさに応じたストッパ部材50の荷重−たわみ特性の変化を顕著にできる。   Since the elastic stopper portion 61 is vulcanized and bonded to the concave portion 54a that is recessed toward the through hole 56, the deformation of the elastic stopper portion 61 due to the load from the inner cylinder 10 is caused by the filling portion 62 in the through hole 56 along the concave portion 54a. Can be easily communicated to. As a result, the deformation of the elastic stopper portion 61 can be easily absorbed by the filling portion 62 along the concave portion 54a, so that the change in the load-deflection characteristic of the stopper member 50 according to the size of the through hole 56 (filling portion 62) can be reduced. Can be noticeable.

ここで、外筒20に対する内筒10の径方向への相対移動時に内筒10からの荷重を受ける弾性ストッパ部61(剛体部53の内面54側の弾性部60)に注入跡部64が設けられる場合について説明する。注入跡部64を内面54側に設けるには、加硫成形時にゴム状弾性体の成形材料を加硫金型80内に充填し易くするため、薄いゴム膜部63でなく弾性ストッパ部61に注入孔84を連結する(注入跡部64を設ける)ことが好ましい。しかし、弾性ストッパ部61(内面54側の弾性部60)に注入跡部64があると、内筒10と弾性ストッパ部61との接触の繰り返しによって、注入跡部64を起点に弾性部60に亀裂や破断が生じるおそれがある。   Here, the injection trace portion 64 is provided in the elastic stopper portion 61 (the elastic portion 60 on the inner surface 54 side of the rigid body portion 53) that receives a load from the inner tube 10 when the inner tube 10 is moved relative to the outer tube 20 in the radial direction. The case will be described. In order to provide the injection trace portion 64 on the inner surface 54 side, it is injected into the elastic stopper portion 61 instead of the thin rubber film portion 63 so that the rubber-like elastic molding material can be easily filled in the vulcanization mold 80 during vulcanization molding. It is preferable to connect the hole 84 (provide the injection trace part 64). However, if there is the injection trace portion 64 in the elastic stopper portion 61 (the elastic portion 60 on the inner surface 54 side), the repeated contact between the inner cylinder 10 and the elastic stopper portion 61 causes cracks in the elastic portion 60 starting from the injection trace portion 64. Breakage may occur.

これに対して本実施の形態では、注入跡部64が剛体部53の外面55側に位置するので、注入跡部64やその付近が内筒10との接触を繰り返すことがない。そのため、弾性部60の耐久性を確保できる。さらに、弾性部60の加硫成形時には、注入跡部64の位置から加硫金型内に注入されたゴム状弾性体の成形材料を、剛体部53の外面55側から貫通孔56を通って内面54側に充填し易くできる。よって、弾性部60の耐久性を確保しつつ、弾性部60の形成を容易にできる。   On the other hand, in the present embodiment, since the injection trace portion 64 is located on the outer surface 55 side of the rigid portion 53, the injection trace portion 64 and its vicinity do not repeat contact with the inner cylinder 10. Therefore, the durability of the elastic part 60 can be ensured. Further, at the time of vulcanization molding of the elastic portion 60, the rubber-like elastic molding material injected into the vulcanization mold from the position of the injection trace portion 64 is passed through the through hole 56 from the outer surface 55 side of the rigid portion 53 to the inner surface. It can be easily filled on the 54 side. Therefore, the elastic part 60 can be easily formed while ensuring the durability of the elastic part 60.

また、外面55側の薄いゴム膜部63に注入跡部64を形成しても良い。この場合には、注入孔84の先端と剛体部53との間を所定距離あけて成形材料の充填をし易くすることが好ましい。そうすると、ゴム膜部63から注入跡部64が外筒20側に突出することがある。これにより、外筒20と剛体部53との間で注入跡部64が圧縮され、注入跡部64に負荷が集中して、注入跡部64を起点に弾性部60に亀裂が生じたり、ストッパ部材50の荷重−たわみ特性にばらつきが生じたりする。   Alternatively, the injection trace portion 64 may be formed in the thin rubber film portion 63 on the outer surface 55 side. In this case, it is preferable to easily fill the molding material with a predetermined distance between the tip of the injection hole 84 and the rigid portion 53. If it does so, the injection | pouring trace part 64 may protrude from the rubber film part 63 to the outer cylinder 20 side. Thereby, the injection trace part 64 is compressed between the outer cylinder 20 and the rigid body part 53, the load concentrates on the injection trace part 64, and the elastic part 60 is cracked from the injection trace part 64, or the stopper member 50 Variations in load-deflection characteristics may occur.

本実施の形態では、充填部62の外筒20側の端面に注入跡部64が位置するので、ゴム膜部63よりも外筒20側に注入跡部64が突出しないようにできる。たとえゴム膜部63よりも外筒20側に注入跡部64が突出したとしても、剛体部53と外筒20との間で注入跡部64が圧縮されることを防止できる。これにより、注入跡部64への負荷集中によって、注入跡部64を起点に弾性部60に亀裂が生じたり、ストッパ部材50の荷重−たわみ特性にばらつきが生じたりすることを抑制できる。その結果、弾性部60の耐久性を向上できると共に、ストッパ部材50の荷重−たわみ特性を安定化できる。   In the present embodiment, since the injection trace portion 64 is located on the end surface of the filling portion 62 on the outer cylinder 20 side, the injection trace portion 64 can be prevented from protruding toward the outer cylinder 20 side than the rubber film portion 63. Even if the injection trace portion 64 protrudes further toward the outer cylinder 20 than the rubber film portion 63, the injection trace portion 64 can be prevented from being compressed between the rigid body portion 53 and the outer cylinder 20. Thereby, it is possible to suppress the occurrence of cracks in the elastic portion 60 starting from the injection trace portion 64 and variations in the load-deflection characteristics of the stopper member 50 due to the load concentration on the injection trace portion 64. As a result, the durability of the elastic portion 60 can be improved, and the load-deflection characteristics of the stopper member 50 can be stabilized.

外筒20に対する相対移動時には、液室71,72を区画する軸方向隔壁43が変形するので、液室71,72に液圧変動が生じ、液室71,72内の液体がオリフィス73を通って流れる。オリフィス73によって液共振が生じ、振動が減衰される。オリフィス73による減衰特性は、オリフィス73の形状や流路断面積、長さ等で変化する。   At the time of relative movement with respect to the outer cylinder 20, the axial partition wall 43 that divides the liquid chambers 71 and 72 is deformed, so that the liquid pressure varies in the liquid chambers 71 and 72, and the liquid in the liquid chambers 71 and 72 passes through the orifice 73. Flowing. Liquid resonance is generated by the orifice 73, and the vibration is attenuated. The attenuation characteristic by the orifice 73 varies depending on the shape of the orifice 73, the flow path cross-sectional area, the length, and the like.

オリフィス73は、外筒20の内周面と連結壁32の外周面との間に形成される第1オリフィス74と、外筒20の内周面と一対のストッパ部材50の周方向端部との間にそれぞれ形成される一対の第2オリフィス75とを備える。第1オリフィス74と第2オリフィス75とは互いに連通する。なお、第1オリフィス74の軸方向両側の壁面は、一対の弾性壁部45により形成される。第2オリフィス75の軸方向両側の壁面は、径方向隔壁41や軸方向隔壁43の一部により形成される。   The orifice 73 includes a first orifice 74 formed between the inner peripheral surface of the outer cylinder 20 and the outer peripheral surface of the connecting wall 32, the inner peripheral surface of the outer cylinder 20, and circumferential end portions of the pair of stopper members 50. And a pair of second orifices 75 formed respectively. The first orifice 74 and the second orifice 75 communicate with each other. The wall surfaces on both axial sides of the first orifice 74 are formed by a pair of elastic wall portions 45. Wall surfaces on both axial sides of the second orifice 75 are formed by a part of the radial partition wall 41 and the axial partition wall 43.

ここで、連結壁32と外筒20との間であって一対の弾性壁部45の間にストッパ部材の周方向端部を嵌めることで、中間筒30にストッパ部材を固定する場合について説明する。この場合には、連結壁32と外筒20との間の限られた空間内にストッパ部材の一部が存在するため、連結壁32と外筒20との間の第1オリフィス74の形状や流路断面積に制約が生じる。また、連結壁32と外筒20との間のストッパ部材に第1オリフィス74を形成する溝などを設ける必要があり、ストッパ部材の形状が複雑になる。   Here, the case where the stopper member is fixed to the intermediate cylinder 30 by fitting the circumferential end of the stopper member between the connecting wall 32 and the outer cylinder 20 between the pair of elastic wall portions 45 will be described. . In this case, since a part of the stopper member exists in the limited space between the connecting wall 32 and the outer cylinder 20, the shape of the first orifice 74 between the connecting wall 32 and the outer cylinder 20 There is a restriction on the cross-sectional area of the flow path. Further, it is necessary to provide a groove or the like for forming the first orifice 74 in the stopper member between the connecting wall 32 and the outer cylinder 20, and the shape of the stopper member becomes complicated.

これに対して本実施の形態では、ストッパ部材50の一対の接触部51を一対の連結壁32に接触させつつ、規制部52を連結壁32の周方向端部に接触させることで、中間筒30にストッパ部材50を固定できる。このようにストッパ部材50の位置決めのために、連結壁32と外筒20との間にストッパ部材50の一部を設けないようにできる。その結果、連結壁32と外筒20との間の第1オリフィス74の形状や流路断面積などの自由度を向上できる。さらに、ストッパ部材50に第1オリフィス74を形成する溝を設ける必要がないので、ストッパ部材50の形状をシンプルにできる。   On the other hand, in the present embodiment, the intermediate cylinder is obtained by bringing the regulating portion 52 into contact with the circumferential end of the coupling wall 32 while bringing the pair of contact portions 51 of the stopper member 50 into contact with the pair of coupling walls 32. The stopper member 50 can be fixed to 30. Thus, in order to position the stopper member 50, a part of the stopper member 50 can be prevented from being provided between the connecting wall 32 and the outer cylinder 20. As a result, the degree of freedom such as the shape of the first orifice 74 between the connecting wall 32 and the outer cylinder 20 and the cross-sectional area of the flow path can be improved. Further, since it is not necessary to provide a groove for forming the first orifice 74 in the stopper member 50, the shape of the stopper member 50 can be simplified.

また、連結壁32と外筒20との間にストッパ部材50がないので、連結壁32の外周面に設けられる弾性壁部45でオリフィス73の壁面の一部を形成できる。これにより、連結壁32の形状や寸法などを変更することなく、弾性壁部45の形状や寸法などを変更することで、オリフィス73の形状や流路断面積を変更できる。よって、連結壁32を流用しつつオリフィス73の形状や流路断面積などの自由度を向上できる。   In addition, since there is no stopper member 50 between the connection wall 32 and the outer cylinder 20, a part of the wall surface of the orifice 73 can be formed by the elastic wall portion 45 provided on the outer peripheral surface of the connection wall 32. Thereby, the shape and the cross-sectional area of the orifice 73 can be changed by changing the shape and size of the elastic wall portion 45 without changing the shape and size of the connecting wall 32. Therefore, the degree of freedom such as the shape of the orifice 73 and the cross-sectional area of the flow path can be improved while diverting the connection wall 32.

ストッパ部材50の外周面の周方向先端まで溝部50c(図5参照)が設けられているので、ストッパ部材50の周方向端部と外筒20の内周面との間に形成される第2オリフィス75に溝部50cが連なる。これにより、液室71,72内を流れる液体が溝部50cを通って第2オリフィス75へ流れるので、液室71,72から第2オリフィス75への液体の流れをスムーズにできる。   Since the groove part 50c (refer FIG. 5) is provided to the circumferential direction front-end | tip of the outer peripheral surface of the stopper member 50, the 2nd formed between the circumferential direction edge part of the stopper member 50 and the internal peripheral surface of the outer cylinder 20 is provided. The groove portion 50 c is continuous with the orifice 75. As a result, the liquid flowing in the liquid chambers 71 and 72 flows to the second orifice 75 through the groove 50c, so that the liquid flow from the liquid chambers 71 and 72 to the second orifice 75 can be made smooth.

次に図7、図8および図9を参照して、第2実施の形態について説明する。第1実施の形態では、ストッパ部材50の外周面にオリフィス73形成用の溝を設けない場合について説明した。これに対し第2実施の形態では、ストッパ部材110の外周面にオリフィス104形成用の溝であるオリフィス溝111を設ける場合について説明する。なお、第1実施の形態と同一の部分については、同一の符号を付して以下の説明を省略する。図7は第2実施の形態における液封入式防振装置100の径方向断面図である。図8は図7のVIII−VIII線における液封入式防振装置100の断面図である。図9はストッパ部材110の斜視図である。   Next, a second embodiment will be described with reference to FIG. 7, FIG. 8, and FIG. In the first embodiment, the case where the groove for forming the orifice 73 is not provided on the outer peripheral surface of the stopper member 50 has been described. In contrast, in the second embodiment, a case where an orifice groove 111 that is a groove for forming the orifice 104 is provided on the outer peripheral surface of the stopper member 110 will be described. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. FIG. 7 is a radial cross-sectional view of the liquid-filled vibration isolator 100 according to the second embodiment. 8 is a cross-sectional view of the liquid-filled vibration isolator 100 taken along the line VIII-VIII in FIG. FIG. 9 is a perspective view of the stopper member 110.

図7及び図8に示すように液封入式防振装置100は、円筒状に形成された内筒10と、内筒10の外周側を同心状に取り囲む円筒状の外筒20と、外筒20の内周面に嵌合する中間筒30と、中間筒30と内筒10とを連結する防振基体40と、外筒20に対する内筒10の相対移動を規制するストッパ部材110とを備える。ストッパ部材110は、液室71,72内にそれぞれ配置される一対の部材である。   As shown in FIGS. 7 and 8, the liquid-filled vibration isolator 100 includes a cylindrical inner cylinder 10, a cylindrical outer cylinder 20 that concentrically surrounds the outer peripheral side of the inner cylinder 10, and an outer cylinder. 20 is provided with an intermediate cylinder 30 fitted to the inner peripheral surface of 20, a vibration isolation base 40 that connects the intermediate cylinder 30 and the inner cylinder 10, and a stopper member 110 that restricts relative movement of the inner cylinder 10 with respect to the outer cylinder 20. . The stopper member 110 is a pair of members disposed in the liquid chambers 71 and 72, respectively.

ストッパ部材110は、ストッパ部材110の周方向端部にそれぞれ設けられてY方向に突出する一対の接触部51と、ストッパ部材110の周方向端部にそれぞれ設けられてX方向に突出する一対の規制部52とを備える。一対の接触部51を一対の連結壁32の内面にそれぞれ接触させ、一対の規制部52を一対の連結壁32の周方向端部にそれぞれ接触させ、外周面の一部(円弧面部50a)を外筒20に接触させることで、ストッパ部材110が外筒20及び中間筒30に固定される。   The stopper member 110 is provided at each circumferential end of the stopper member 110 and protrudes in the Y direction. The stopper member 110 is provided at each circumferential end of the stopper member 110 and protrudes in the X direction. And a restriction unit 52. The pair of contact portions 51 are brought into contact with the inner surfaces of the pair of connecting walls 32, the pair of restricting portions 52 are brought into contact with the circumferential end portions of the pair of connecting walls 32, respectively, and a part of the outer peripheral surface (arc surface portion 50a) is made. By contacting the outer cylinder 20, the stopper member 110 is fixed to the outer cylinder 20 and the intermediate cylinder 30.

図9に示すように、ストッパ部材110は、略半円筒状の部材である。ストッパ部材110の外周面は、周方向中央に設けられる円弧形状の円弧面部50aと、円弧面部50aの周方向両側にそれぞれ連なる凹面部50bと、円弧面部50aの一部を径方向に凹ませて形成されるオリフィス溝111とを備える。オリフィス溝111は、ストッパ部材110の周方向端部に開口する第1開口112と、ストッパ部材110の軸方向端部に開口する第2開口113とを備える。   As shown in FIG. 9, the stopper member 110 is a substantially semi-cylindrical member. The outer circumferential surface of the stopper member 110 has a circular arc surface portion 50a provided at the center in the circumferential direction, a concave surface portion 50b continuous on both sides in the circumferential direction of the circular arc surface portion 50a, and a portion of the circular arc surface portion 50a being recessed in the radial direction. And an orifice groove 111 to be formed. The orifice groove 111 includes a first opening 112 that opens at the circumferential end of the stopper member 110 and a second opening 113 that opens at the axial end of the stopper member 110.

図7及び図9に示すように、ストッパ部材110の円弧面部50aを外筒20の内周面に面接触させた状態で、オリフィス溝111と外筒20の内周面とにより第2オリフィス105が形成される。第1開口112は、連結壁32と外筒20との間の第1オリフィス74に接続する部位である。第2開口113は、第2オリフィス105を液室71,72にそれぞれ連通させる部位である。なお、一対の連結壁32の一方(図7上側)と外筒20との間には第1オリフィス74が形成されるが、一対の連結壁32の他方(図7下側)と外筒20との間は弾性壁部102が充填されて塞がれる。   As shown in FIGS. 7 and 9, the second orifice 105 is formed by the orifice groove 111 and the inner peripheral surface of the outer cylinder 20 in a state where the arc surface portion 50 a of the stopper member 110 is in surface contact with the inner peripheral surface of the outer cylinder 20. Is formed. The first opening 112 is a part connected to the first orifice 74 between the connecting wall 32 and the outer cylinder 20. The second opening 113 is a part that allows the second orifice 105 to communicate with the liquid chambers 71 and 72, respectively. A first orifice 74 is formed between one of the pair of connection walls 32 (upper side in FIG. 7) and the outer cylinder 20, but the other of the pair of connection walls 32 (lower side in FIG. 7) and the outer cylinder 20. The elastic wall portion 102 is filled and closed.

このように、一対のストッパ部材110のオリフィス溝111による第2オリフィス105と第1オリフィス74とが連通して、オリフィス104が形成される。オリフィス104は、内筒10の周りに半周以上形成され、液室71と液室72とを連通する。   In this way, the second orifice 105 and the first orifice 74 formed by the orifice groove 111 of the pair of stopper members 110 communicate with each other to form the orifice 104. The orifice 104 is formed more than half a circumference around the inner cylinder 10 and communicates the liquid chamber 71 and the liquid chamber 72.

図8に示すように、第1オリフィス74の流路断面積と、第2オリフィス105の流路断面積とは同一に設定される。詳しくは、第1オリフィス74の深さ(径方向寸法)及び幅(軸方向寸法)と、第2オリフィス105の深さ及び幅とが同一に設定される。これは、連結壁32の外周面の軸方向両側に一対の弾性壁部45を設け、一対の弾性壁部45間の距離とオリフィス溝111の幅とを同一にしたためである。さらに、一対の弾性壁部45間を軸方向に連結する弾性壁部101を連結壁32の外周面に加硫接着することで、弾性壁部101と外筒20との距離をオリフィス溝111の深さと同一にしたためである。   As shown in FIG. 8, the flow path cross-sectional area of the first orifice 74 and the flow path cross-sectional area of the second orifice 105 are set to be the same. Specifically, the depth (diameter dimension) and width (axial dimension) of the first orifice 74 and the depth and width of the second orifice 105 are set to be the same. This is because a pair of elastic wall portions 45 are provided on both axial sides of the outer peripheral surface of the connecting wall 32 so that the distance between the pair of elastic wall portions 45 and the width of the orifice groove 111 are the same. Further, the elastic wall portion 101 that connects the pair of elastic wall portions 45 in the axial direction is vulcanized and bonded to the outer peripheral surface of the connecting wall 32, so that the distance between the elastic wall portion 101 and the outer cylinder 20 is reduced in the orifice groove 111. This is because the depth is the same.

このように、弾性壁部45,101の形状や寸法などを変えることで、第1オリフィス74の流路断面積や形状を容易に変更できる。即ち、連結壁32(本体部32a)の形状や寸法などを変更することなく、弾性壁部45,101の形状や寸法などを変更することで、第1オリフィス74の形状や流路断面積を変更できる。その結果、連結壁32を流用しつつ、第1オリフィスの形状や流路断面積などの自由度を向上できる。   Thus, by changing the shape and dimensions of the elastic wall portions 45 and 101, the flow path cross-sectional area and shape of the first orifice 74 can be easily changed. That is, by changing the shape and size of the elastic wall portions 45 and 101 without changing the shape and size of the connecting wall 32 (main body portion 32a), the shape and flow path cross-sectional area of the first orifice 74 can be changed. Can be changed. As a result, the degree of freedom such as the shape of the first orifice and the cross-sectional area of the flow path can be improved while diverting the connection wall 32.

図7及び図8に示すように、ストッパ部材110は、金属や合成樹脂等から構成されて所定の剛性を有する剛体部115に、ゴム状弾性体から構成される弾性部120を加硫接着して形成される。剛体部115は、ストッパ部材110の外形を主に規定する部材であり、軸心Oを中心に湾曲した略半円筒状に形成される。剛体部115は、内筒10側に面する内面54と、内面54に連なる外面55と、内面54及び外面55に開口する貫通孔116とを備える。   As shown in FIGS. 7 and 8, the stopper member 110 is formed by vulcanizing and bonding an elastic portion 120 made of a rubber-like elastic body to a rigid body portion 115 made of metal, synthetic resin or the like and having a predetermined rigidity. Formed. The rigid body 115 is a member that mainly defines the outer shape of the stopper member 110, and is formed in a substantially semi-cylindrical shape that is curved around the axis O. The rigid body 115 includes an inner surface 54 facing the inner cylinder 10, an outer surface 55 connected to the inner surface 54, and a through hole 116 that opens to the inner surface 54 and the outer surface 55.

貫通孔116は、内面54の凹部54aの周方向中央および軸方向中央に開口すると共に、外面55のうち軸方向端面に開口する。貫通孔116は、内面54に開口する直交部117を備える。直交部117は、軸心Oとの直交位置に配置されつつ、軸方向隔壁43と垂直に配置される。   The through hole 116 opens at the center in the circumferential direction and the center in the axial direction of the recess 54 a of the inner surface 54, and opens at the axial end surface of the outer surface 55. The through hole 116 includes an orthogonal part 117 that opens to the inner surface 54. The orthogonal portion 117 is disposed perpendicular to the axial partition wall 43 while being disposed at a position orthogonal to the axis O.

弾性部120は、剛体部115の表面(内面54及び外面55)を覆うゴム状弾性体である。弾性部120は、凹部54aに加硫接着される弾性ストッパ部61と、貫通孔116の内部に充填される充填部121と、弾性ストッパ部61及び充填部121に連なる薄い膜状のゴム膜部63と、加硫成形時に形成されたゴム状弾性体の注入跡部123とを備える。弾性ストッパ部61、充填部121、ゴム膜部63及び注入跡部123は、一体に加硫成形されて互いに連なる。   The elastic portion 120 is a rubber-like elastic body that covers the surface (the inner surface 54 and the outer surface 55) of the rigid portion 115. The elastic portion 120 includes an elastic stopper portion 61 vulcanized and bonded to the concave portion 54a, a filling portion 121 filled in the through hole 116, and a thin film-like rubber film portion connected to the elastic stopper portion 61 and the filling portion 121. 63 and a rubber-like elastic injection trace 123 formed during vulcanization molding. The elastic stopper portion 61, the filling portion 121, the rubber film portion 63, and the injection trace portion 123 are integrally vulcanized and connected to each other.

充填部121は、弾性ストッパ部61に連なって貫通孔116内に充填される部位である。充填部121は、貫通孔116の直交部117に充填される直交充填部122を備える。直交充填部122が軸心Oとの直交位置に配置されるので、外筒20に対する内筒10の径方向への相対移動時に、内筒10の移動を規制した弾性ストッパ部61が内筒10から受ける軸直角方向の荷重を直交部117内の直交充填部122により吸収できる。その結果、直交部117(直交充填部122)の大きさに応じてストッパ部材110の荷重−たわみ特性を変更できる。   The filling portion 121 is a portion that is continuous with the elastic stopper portion 61 and is filled into the through hole 116. The filling part 121 includes an orthogonal filling part 122 that fills the orthogonal part 117 of the through hole 116. Since the orthogonal filling portion 122 is disposed at a position orthogonal to the axis O, the elastic stopper portion 61 that restricts the movement of the inner cylinder 10 when the inner cylinder 10 moves relative to the outer cylinder 20 in the radial direction. Can be absorbed by the orthogonal filling portion 122 in the orthogonal portion 117. As a result, the load-deflection characteristic of the stopper member 110 can be changed according to the size of the orthogonal part 117 (orthogonal filling part 122).

ストッパ部材110の外周面には、オリフィス溝111が形成されるため、剛体部115の外面55のうち外周面に注入跡部123を位置させることは困難である。しかし、本実施の形態では、外面55のうち軸方向端面にゴム状弾性体の注入跡部123が形成されるので、外面55に注入跡部123を設け易くできる。外面55に注入跡部123を設けることで、第1実施の形態と同様に、外筒20と内筒10との相対移動時に、注入跡部123やその付近を内筒10と接触しないようにできる。その結果、弾性部120の耐久性を確保できる。   Since the orifice groove 111 is formed on the outer peripheral surface of the stopper member 110, it is difficult to position the injection trace portion 123 on the outer peripheral surface of the outer surface 55 of the rigid body portion 115. However, in the present embodiment, since the injection trace portion 123 of the rubber-like elastic body is formed on the end surface in the axial direction of the outer surface 55, the injection trace portion 123 can be easily provided on the outer surface 55. By providing the injection trace portion 123 on the outer surface 55, the injection trace portion 123 and its vicinity can be prevented from coming into contact with the inner cylinder 10 during relative movement between the outer cylinder 20 and the inner cylinder 10 as in the first embodiment. As a result, the durability of the elastic part 120 can be ensured.

さらに、貫通孔116に充填された充填部121の外面55側の端面に注入跡部123が位置する。これにより、弾性部120の加硫成形時には、注入跡部123の位置から加硫金型80(図6参照)内に注入されたゴム状弾性体の成形材料を、剛体部115の外面55側から貫通孔116を通って内面54側に充填し易くできる。よって、弾性部120の耐久性を確保しつつ、弾性部120の形成を容易にできる。   Further, the injection trace portion 123 is located on the end surface on the outer surface 55 side of the filling portion 121 filled in the through hole 116. Thereby, at the time of vulcanization molding of the elastic portion 120, the molding material of the rubber-like elastic body injected into the vulcanization mold 80 (see FIG. 6) from the position of the injection trace portion 123 is transferred from the outer surface 55 side of the rigid body portion 115. It is possible to easily fill the inner surface 54 side through the through hole 116. Therefore, the elastic part 120 can be easily formed while ensuring the durability of the elastic part 120.

以上、実施の形態に基づき本発明を説明したが、本発明は上記各実施の形態に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲内で種々の改良変形が可能であることは容易に推察できるものである。例えば、上記各実施の形態で挙げた形状や素材は一例であり、他の形状や素材を採用することは当然可能である。   The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. Can be easily guessed. For example, the shapes and materials mentioned in the above embodiments are examples, and other shapes and materials can naturally be adopted.

上記各実施の形態では、連結壁32の外周面に弾性壁部45,102を加硫接着し、その弾性壁部45,102を第1オリフィス74の壁面の一部とする場合について説明したが、必ずしもこれに限られるものではない。弾性壁部45,102を省略して、連結壁32により第1オリフィス74の壁面の一部を構成しても良い。   In each of the above-described embodiments, the elastic wall portions 45 and 102 are vulcanized and bonded to the outer peripheral surface of the connecting wall 32, and the elastic wall portions 45 and 102 are part of the wall surface of the first orifice 74. However, it is not necessarily limited to this. The elastic wall portions 45 and 102 may be omitted, and the connecting wall 32 may constitute a part of the wall surface of the first orifice 74.

上記各実施の形態では、金属や合成樹脂等の剛性材料製の剛体部53,115に弾性部60,120を加硫接着してストッパ部材50,110を形成する場合について説明したが、必ずしもこれに限られるものではない。ストッパ部材50,110全体を金属や合成樹脂等の剛性材料で形成することは当然可能である。   In each of the above embodiments, the case where the stopper members 50 and 110 are formed by vulcanizing and bonding the elastic portions 60 and 120 to the rigid body portions 53 and 115 made of a rigid material such as metal or synthetic resin has been described. It is not limited to. It is naturally possible to form the stopper members 50 and 110 entirely from a rigid material such as metal or synthetic resin.

上記各実施の形態では、連結壁32と外筒20との間にストッパ部材50,110の一部を設けない場合について説明したが、必ずしもこれに限られるものではない。連結壁32と外筒20との間にストッパ部材の一部を設け、その部分に第1オリフィス74形成用の溝を設けても良い。接触部51及び規制部52によりストッパ部材が外筒20及び中間筒30に固定されるので、連結壁32と外筒20との間に設けたストッパ部材の一部に連結壁32等から応力をかかり難くできる。そのため、連結壁32と外筒20との間に設けたストッパ部材の一部の形状や寸法は、強度による制約を受け難くできる。その結果、連結壁32と外筒20との間のストッパ部材50,110に設ける第1オリフィス74形成用の溝の形状や寸法などの自由度を向上できるので、第1オリフィス74の形状や流路断面積などの自由度を向上できる。   In each of the above embodiments, the case where a part of the stopper members 50 and 110 is not provided between the connecting wall 32 and the outer cylinder 20 has been described, but the present invention is not necessarily limited thereto. A part of the stopper member may be provided between the connecting wall 32 and the outer cylinder 20, and a groove for forming the first orifice 74 may be provided in that part. Since the stopper member is fixed to the outer cylinder 20 and the intermediate cylinder 30 by the contact part 51 and the restriction part 52, stress is applied to a part of the stopper member provided between the connection wall 32 and the outer cylinder 20 from the connection wall 32 or the like. It can be difficult to take. Therefore, the shape and size of a part of the stopper member provided between the connecting wall 32 and the outer cylinder 20 can be hardly subject to restrictions due to strength. As a result, the degree of freedom such as the shape and size of the groove for forming the first orifice 74 provided in the stopper members 50 and 110 between the connecting wall 32 and the outer cylinder 20 can be improved. The degree of freedom such as the road cross-sectional area can be improved.

上記各実施の形態では、接触部51の連結壁32に接触する面がY方向に平坦に形成される場合について説明したが、必ずしもこれに限られるものではない。一対の接触部51の先端側から互いに離れる方向に突起を突出させても良い。その突起を連結壁32のゴム部32bに食い込ませることができる。これにより、ストッパ部材50,110を一対の連結壁32の間に嵌め難くはなるが、ストッパ部材50,110を連結壁32に対してより強固に固定できる。またこの場合、ストッパ部材50,110の外周面を外筒20に接触させなくても、ストッパ部材50,110を外筒側へ移動しないようにできる。   In each of the above embodiments, the case where the surface of the contact portion 51 that contacts the connecting wall 32 is formed flat in the Y direction has been described. However, the present invention is not necessarily limited thereto. The protrusions may be protruded in directions away from the distal ends of the pair of contact portions 51. The protrusion can be bitten into the rubber portion 32 b of the connecting wall 32. Thereby, although it becomes difficult to fit the stopper members 50 and 110 between the pair of connecting walls 32, the stopper members 50 and 110 can be more firmly fixed to the connecting wall 32. In this case, the stopper members 50 and 110 can be prevented from moving to the outer cylinder side even if the outer peripheral surfaces of the stopper members 50 and 110 are not brought into contact with the outer cylinder 20.

上記各実施の形態では、貫通孔56,116がストッパ部材50,110(剛体部53,115)の周方向中央に設けられる場合について説明したが、必ずしもこれに限られるものではない。ストッパ部材50,110の周方向中央から周方向端部側へずれた位置に貫通孔56,116を設けても良い。なお、内筒10に対して液封入式防振装置1,100の主入力荷重の方向に貫通孔56,116を設けることで、弾性ストッパ部61が内筒10から受ける軸直角方向の荷重を、貫通孔56,116内の充填部62,121により吸収できる。   In each of the above embodiments, the case where the through holes 56 and 116 are provided at the center in the circumferential direction of the stopper members 50 and 110 (the rigid body portions 53 and 115) has been described, but the present invention is not necessarily limited thereto. The through holes 56 and 116 may be provided at positions shifted from the circumferential center of the stopper members 50 and 110 toward the circumferential end. In addition, by providing the through holes 56 and 116 in the direction of the main input load of the liquid-filled vibration isolator 1 and 100 with respect to the inner cylinder 10, the load in the direction perpendicular to the axis that the elastic stopper 61 receives from the inner cylinder 10 is applied. It can be absorbed by the filling parts 62 and 121 in the through holes 56 and 116.

上記第1実施の形態では、貫通孔56が軸心Oとの直交位置に配置される場合について説明した。上記第2実施の形態では、貫通孔116の直交部117が軸心Oとの直交位置に配置される場合について説明した。しかし、必ずしもこれに限られるものではない。軸心Oとの直交位置からずれた箇所に貫通孔56や直交部117を設けることは当然可能である。この場合にも弾性部60,120の加硫成形時に、ゴム状弾性体の成形材料を、剛体部53,115の外面55側から貫通孔56,116を通して内面54側に充填し易くできる。   In the first embodiment, the case where the through hole 56 is disposed at a position orthogonal to the axis O has been described. In the second embodiment, the case where the orthogonal portion 117 of the through hole 116 is disposed at a position orthogonal to the axis O has been described. However, it is not necessarily limited to this. Naturally, it is possible to provide the through hole 56 and the orthogonal portion 117 at a position shifted from the position orthogonal to the axis O. Also in this case, at the time of vulcanization molding of the elastic portions 60, 120, the rubber-like elastic molding material can be easily filled from the outer surface 55 side of the rigid body portions 53, 115 to the inner surface 54 side through the through holes 56, 116.

上記第2実施の形態では、一対のストッパ部材110と外筒20との間の2本の第2オリフィス105が、連結壁32と外筒20との間の1本の第1オリフィス74に連なり、オリフィス104が内筒10の周方向に半周以上形成される場合について説明したが、必ずしもこれに限られるものではない。例えば、下記のようにオリフィスを1周以上設けることは当然可能である。一対の連結壁32の一方と外筒20との間に第1オリフィスを2本並列して設け、一対の連結壁32の他方と外筒20との間に第1オリフィスを1本設け、一対のストッパ部材110と外筒20との間にも2本の第2オリフィスを設ける。第2オリフィスのうち1本目は、ストッパ部材110の周方向両端に開口して周方向両側の第1オリフィスに連通する。第2オリフィスのうち2本目は、ストッパ部材110の周方向端部に開口した部位が2本並列した第1オリフィスの一方に連通し、ストッパ部材110の軸方向端部に開口した部位が液室71,72に連通する。これにより、複数の第1オリフィス及び第2オリフィスによって1周以上のオリフィスが形成される。   In the second embodiment, two second orifices 105 between the pair of stopper members 110 and the outer cylinder 20 are connected to one first orifice 74 between the connection wall 32 and the outer cylinder 20. Although the case where the orifice 104 is formed more than half a circumference in the circumferential direction of the inner cylinder 10 has been described, it is not necessarily limited thereto. For example, it is naturally possible to provide one or more orifices as described below. Two first orifices are provided in parallel between one of the pair of connection walls 32 and the outer cylinder 20, and one first orifice is provided between the other of the pair of connection walls 32 and the outer cylinder 20. Two second orifices are also provided between the stopper member 110 and the outer cylinder 20. The first of the second orifices opens at both circumferential ends of the stopper member 110 and communicates with the first orifices on both circumferential sides. The second of the second orifices has a portion opened at the circumferential end of the stopper member 110 communicating with one of the first orifices arranged in parallel, and a portion opened at the axial end of the stopper member 110 is a liquid chamber. 71 and 72 are communicated. Thereby, one or more orifices are formed by the plurality of first and second orifices.

1,100 液封入式防振装置
10 内筒
20 外筒
30 中間筒
31 嵌合周壁
32 連結壁
40 防振基体
43 軸方向隔壁
45,101,102 弾性壁部
50,110 ストッパ部材
51 接触部
52 規制部
71,72 液室
73,104 オリフィス
74 第1オリフィス
75,105 第2オリフィス
DESCRIPTION OF SYMBOLS 1,100 Liquid enclosure type vibration isolator 10 Inner cylinder 20 Outer cylinder 30 Intermediate cylinder 31 Fitting peripheral wall 32 Connection wall 40 Anti-vibration base 43 Axial partition 45,101,102 Elastic wall part 50,110 Stopper member 51 Contact part 52 Regulating section 71, 72 Liquid chamber 73, 104 Orifice 74 First orifice 75, 105 Second orifice

Claims (4)

内筒と、
前記内筒の外周側を取り囲む外筒と、
前記外筒の内周面に嵌合する中間筒と、
前記中間筒と前記内筒とを連結するゴム状弾性体から構成される防振基体と、
前記防振基体の軸方向隔壁により前記内筒を挟んで相対する位置に区画される一対の液室と、
一対の前記液室を連通するオリフィスと、
一対の前記液室にそれぞれ配置されて前記内筒を挟んで互いに対向すると共に、前記外筒に対する前記内筒の相対移動を規制する一対のストッパ部材とを備え、
前記中間筒は、前記外筒の内周面に嵌合する筒状の一対の嵌合周壁と、
前記嵌合周壁よりも径方向内側で一対の前記嵌合周壁をそれぞれ連結すると共に、前記軸方向隔壁がそれぞれ連結される一対の連結壁とを備え、
前記ストッパ部材は、一対の連結壁の内面にそれぞれ接触する一対の接触部と、
前記内筒側への前記ストッパ部材の移動を規制する規制部とを備え、
前記オリフィスは、前記連結壁と前記外筒との間に形成される第1オリフィスと、
前記ストッパ部材と前記外筒との間に形成されて前記第1オリフィスに連通する第2オリフィスとを備えることを特徴とする液封入式防振装置。
An inner cylinder,
An outer cylinder surrounding the outer peripheral side of the inner cylinder;
An intermediate cylinder fitted to the inner peripheral surface of the outer cylinder;
A vibration isolating base composed of a rubber-like elastic body connecting the intermediate cylinder and the inner cylinder;
A pair of liquid chambers that are partitioned at positions facing each other with the inner cylinder sandwiched by the axial partition of the vibration-proof base;
An orifice communicating the pair of liquid chambers;
A pair of stopper members disposed in the pair of liquid chambers and opposed to each other across the inner cylinder, and restricting relative movement of the inner cylinder with respect to the outer cylinder;
The intermediate cylinder includes a pair of cylindrical fitting peripheral walls that are fitted to the inner peripheral surface of the outer cylinder;
A pair of connecting peripheral walls connected to each other radially inward of the engaging peripheral walls, and a pair of connecting walls to which the axial partition walls are respectively connected;
The stopper member includes a pair of contact portions that respectively contact inner surfaces of the pair of connecting walls;
A restriction portion for restricting movement of the stopper member toward the inner cylinder side,
The orifice is a first orifice formed between the connecting wall and the outer cylinder;
A liquid-filled type vibration isolator comprising a second orifice formed between the stopper member and the outer cylinder and communicating with the first orifice.
前記規制部は、前記連結壁の周方向端部に接触する部位であり、
前記ストッパ部材は、無荷重状態において前記軸方向隔壁と離れて配置されることを特徴とする請求項1記載の液封入式防振装置。
The restricting portion is a portion that contacts a circumferential end of the connecting wall,
The liquid-filled vibration isolator according to claim 1, wherein the stopper member is disposed apart from the axial partition in a no-load state.
前記ストッパ部材の対向方向において、前記軸方向隔壁の寸法は、前記連結壁の寸法の1/2以下であることを特徴とする請求項1又は2に記載の液封入式防振装置。   3. The liquid-filled vibration isolator according to claim 1, wherein a dimension of the axial partition in a direction opposite to the stopper member is ½ or less of a dimension of the connecting wall. 前記連結壁の外周面に設けられるゴム状弾性体から構成される弾性壁部を備え、
前記弾性壁部により前記第1オリフィスの壁面の一部が形成されることを特徴とする請求項1から3のいずれかに記載の液封入式防振装置。
Comprising an elastic wall portion composed of a rubber-like elastic body provided on the outer peripheral surface of the connecting wall;
4. The liquid-filled type vibration damping device according to claim 1, wherein a part of the wall surface of the first orifice is formed by the elastic wall portion. 5.
JP2017143833A 2017-07-25 2017-07-25 Liquid sealed vibration control device Pending JP2019027450A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014156867A1 (en) * 2013-03-29 2014-10-02 山下ゴム株式会社 Liquid-sealed vibration prevention device
JP2015224651A (en) * 2014-05-26 2015-12-14 東洋ゴム工業株式会社 Liquid sealed type vibration-proof device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014156867A1 (en) * 2013-03-29 2014-10-02 山下ゴム株式会社 Liquid-sealed vibration prevention device
JP2015224651A (en) * 2014-05-26 2015-12-14 東洋ゴム工業株式会社 Liquid sealed type vibration-proof device

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