JP2012180871A - Strut mount - Google Patents

Strut mount Download PDF

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JP2012180871A
JP2012180871A JP2011043052A JP2011043052A JP2012180871A JP 2012180871 A JP2012180871 A JP 2012180871A JP 2011043052 A JP2011043052 A JP 2011043052A JP 2011043052 A JP2011043052 A JP 2011043052A JP 2012180871 A JP2012180871 A JP 2012180871A
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wall portion
vibration
base
cylindrical wall
case member
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JP5629227B2 (en
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Takemune Hashimoto
岳宗 橋本
Takeshi Ueda
健 上田
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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  • Springs (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a strut mount capable of preventing a damping base from coming off from a case member, and preventing idle rotation of an inner member in the case member during fastening of a piston rod.SOLUTION: A damping base 20 is fitted into a cylindrical wall 31 of a case member 30, and a protrusion 23 of the damping base 20 is engaged with a through-hole 35 of the cylindrical wall 31. Accordingly, the damping base 20 is prevented from coming off from the cylindrical wall 31 of the case member 30 during conveyance until a strut mount single body is assembled to a vehicle body. When the piston rod is fastened and fixed to an inner member 10, the idle rotation of the damping base 20 in the cylindrical wall 31 of the case member 30 is prevented by the engagement of the through-hole 35 of the cylindrical wall 31 with the protrusion 23 of the damping base 20. As a result, the workability of the fastening work is improved.

Description

本発明は、ストラットマウントに関し、特に、防振基体がケース部材から脱落することを防止すると共に、ピストンロッドの締結固定時に内側部材がケース部材内で空転することを防止できるストラットマウントに関するものである。   The present invention relates to a strut mount, and more particularly to a strut mount capable of preventing a vibration isolation base from falling off a case member and preventing an inner member from idling in the case member when a piston rod is fastened and fixed. .

自動車の懸架装置では、車体とショックアブソーバのピストンロッドとの間にストラットマウントを介設することで、車輪側から車体側への振動の伝達を抑制している。このストラットマウントは、例えば、特許文献1に開示されるように、ショックアブソーバ5のピストンロッド4の上端部が締結固定されるインナーリング2(内側部材)と、そのインナーリング2を囲むアウターリング6との間を、弾性体8(防振基体)により連結し、車両ボディ3(車体)に取り付けられるフランジ部材19(ケース部材)の円筒形状の部分Aにアウターリング6を圧入して構成される。   In a suspension system for an automobile, transmission of vibration from the wheel side to the vehicle body side is suppressed by interposing a strut mount between the vehicle body and the piston rod of the shock absorber. For example, as disclosed in Patent Document 1, the strut mount includes an inner ring 2 (inner member) to which an upper end portion of a piston rod 4 of a shock absorber 5 is fastened and fixed, and an outer ring 6 surrounding the inner ring 2. The outer ring 6 is press-fitted into a cylindrical portion A of a flange member 19 (case member) attached to the vehicle body 3 (vehicle body). .

なお、このように、インナーリング2とアウターリング6との間を弾性体8で連結する構成では、弾性体8の加硫成形後、アウターリング6に絞り加工を施して縮径させることが行われる。これにより、弾性体8の熱収縮により発生する内部応力を低減して、耐久性の向上を図ることができる。   In this way, in the configuration in which the inner ring 2 and the outer ring 6 are connected by the elastic body 8, after the vulcanization molding of the elastic body 8, the outer ring 6 is drawn to reduce the diameter. Is called. Thereby, the internal stress which generate | occur | produces by the thermal contraction of the elastic body 8 can be reduced, and durability can be improved.

特開2001−82530号公報(図1、段落0014,0018など)JP 2001-82530 A (FIG. 1, paragraphs 0014, 0018, etc.)

ここで、上述した従来のストラットマウントのように、インナーリング2(内側部材)とアウターリング6との間を弾性体8で連結すると共に、アウターリング6をフランジ部材19(ケース部材)に圧入する構成では、アウターリング6の絞り加工が必要となるだけでなく、その絞り加工後の寸法検査も必須となるため、その分、工数が嵩み、製品コストが増加する。   Here, like the conventional strut mount described above, the inner ring 2 (inner member) and the outer ring 6 are connected by the elastic body 8 and the outer ring 6 is press-fitted into the flange member 19 (case member). In the configuration, not only the drawing of the outer ring 6 is required, but also the dimensional inspection after the drawing is indispensable, which increases the man-hours and the product cost.

そのため、アウターリング6を使用せずにストラットマウントを構成できることが望ましいが、単にアウターリング6を省略するだけでは、次の問題点がある。即ち、上述した従来のストラットマウントのように、フランジ部材19(ケース部材)の一側が開放されており、その一側を、車両ボディ3(車体)側の部材により閉封する構造の場合には、ストラットマウントを車体へ組み付けるまでの搬送工程などにおいて、弾性体8がフランジ部材19内から脱落しないようにする必要がある。   For this reason, it is desirable that the strut mount can be configured without using the outer ring 6, but simply omitting the outer ring 6 has the following problems. That is, in the case of a structure in which one side of the flange member 19 (case member) is opened and the one side is sealed by a member on the vehicle body 3 (vehicle body) side as in the conventional strut mount described above. It is necessary to prevent the elastic body 8 from falling out of the flange member 19 in a transport process until the strut mount is assembled to the vehicle body.

しかしながら、この場合、弾性体8をフランジ部材19へ圧入したとしても、弾性体8の弾性力のみでは十分な圧入強度を確保できないため、その脱落を確実に防止することが困難であるという問題点がある。また、同様に、十分な圧入強度が確保できないことから、ピストンロッド4の上端部をインナーリング2(内側部材)に締結固定する際には、その締結トルクにより、インナーリング2が弾性体8と共にフランジ部材19内で空転してしまい、締結作業が阻害されるという問題点があった。   However, in this case, even if the elastic body 8 is press-fitted into the flange member 19, a sufficient press-fitting strength cannot be ensured only by the elastic force of the elastic body 8, so that it is difficult to reliably prevent the drop-out. There is. Similarly, since sufficient press-fit strength cannot be secured, when the upper end portion of the piston rod 4 is fastened and fixed to the inner ring 2 (inner member), the inner ring 2 and the elastic body 8 are caused by the fastening torque. There was a problem that the flange member 19 was idled and the fastening operation was hindered.

本発明は、上述した事情に鑑みてなされたものであり、防振基体がケース部材から脱落することを防止すると共に、ピストンロッドの締結固定時に内側部材がケース部材内で空転することを防止できるストラットマウントを提供することを目的としている。   The present invention has been made in view of the above-described circumstances, and can prevent the vibration-proof base from falling off the case member and prevent the inner member from idling in the case member when the piston rod is fastened and fixed. It aims to provide a strut mount.

課題を解決するための手段および発明の効果Means for Solving the Problems and Effects of the Invention

請求項1記載のストラットマウントによれば、防振基体には、内周側に内側部材が加硫接着されると共に、突部が周方向に分散配置されつつ外周面から軸直角方向外方へ突出され、ケース部材の筒壁部には、その筒壁部を貫通形成して形成され複数の貫通孔が、防振基体の各突部に対応する位置にそれぞれ配置されるので、ケース部材の筒壁部へ防振基体を内嵌させることで、防振基体の突部を筒壁部の貫通孔に係合させることができる。   According to the strut mount of the first aspect, the inner member is vulcanized and bonded to the inner peripheral side of the vibration isolating base, and the protrusions are dispersedly arranged in the circumferential direction and outward from the outer peripheral surface in the direction perpendicular to the axis. Since the plurality of through holes are formed in the cylindrical wall portion of the case member so as to penetrate the cylindrical wall portion and are arranged at positions corresponding to the respective protruding portions of the vibration isolating base, By fitting the vibration isolating base into the cylindrical wall part, the protrusion of the vibration isolating base can be engaged with the through hole of the cylindrical wall part.

これにより、ケース部材の筒壁部に内嵌された防振基体が軸方向一側(締結壁部側の開口側)へ変位することを、防振基体の突部と筒壁部の貫通孔との係合により規制することができる。その結果、防振基体がケース部材(筒壁部)から脱落することを防止することができるという効果がある。同様に、ケース部材の筒壁部に内嵌された防振基体が周方向へ変位(回転)することを、防振基体の突部と筒壁部の貫通孔との係合により規制することができる。その結果、ピストンロッドを内側部材に締結固定する際に、内側部材がケース部材(筒壁部)内で空転することを防止できるという効果がある。よって、締結作業の作業性の向上を図ることができる。   Accordingly, the vibration isolating base fitted in the cylindrical wall portion of the case member is displaced to one side in the axial direction (opening side on the fastening wall side), so that the protrusion of the vibration isolating base and the through hole in the cylindrical wall portion It can regulate by engagement. As a result, there is an effect that the vibration-proof base can be prevented from falling off from the case member (cylinder wall portion). Similarly, the displacement (rotation) of the vibration isolating base fitted in the cylindrical wall portion of the case member in the circumferential direction is restricted by the engagement between the protrusion of the vibration isolating base and the through hole in the cylindrical wall portion. Can do. As a result, when the piston rod is fastened and fixed to the inner member, the inner member can be prevented from idling in the case member (cylinder wall portion). Therefore, the workability of the fastening work can be improved.

このように、請求項1では、従来品において必要とされたアウターリング(以下「外筒金具」と称す)を省略できる。よって、請求項1によれば、外筒金具に絞り加工を施す必要がなく、その結果、絞り加工後の寸法検査も不要となるので、その分、製造工数を低減して、製品コストの削減を図ることができるという効果がある。また、外筒金具を省略できることで、部品点数の削減に伴う部品コストの低減だけでなく、製品の軽量化も図ることができるという効果がある。   Thus, according to the first aspect, the outer ring (hereinafter referred to as “outer cylinder fitting”) required in the conventional product can be omitted. Therefore, according to the first aspect, it is not necessary to perform drawing processing on the outer tube metal fitting, and as a result, dimensional inspection after drawing processing is not required, and accordingly, the number of manufacturing steps can be reduced and the product cost can be reduced. There is an effect that can be achieved. Further, since the outer cylindrical fitting can be omitted, there is an effect that not only the cost of the parts accompanying the reduction of the number of parts but also the weight of the product can be reduced.

また、このように、外筒金具を省略できれば、ケース部材の筒壁部内における限られたスペースにおいて、内側部材および防振基体のためのスペースを確保することができる。よって、内側部材および防振基体の形状の自由度が大きくなるので、設計性を高めて、静的および動的な特性や耐久性の向上を図ることができるという効果がある。   In addition, if the outer cylinder fitting can be omitted in this way, a space for the inner member and the vibration isolation base can be secured in a limited space in the cylinder wall portion of the case member. Therefore, since the degree of freedom of the shape of the inner member and the vibration-proof base is increased, there is an effect that it is possible to improve design and improve static and dynamic characteristics and durability.

また、請求項1によれば、筒壁部に貫通孔が貫通形成されるので、その分、ケース部材の軽量化を図ることができるという効果がある。更に、例えば、平板状の素材を所定の外形形状に打ち抜いて、その打ち抜いた素材にプレス加工を施してケース部材を形成する場合には、平板状の素材を打ち抜く工程において、貫通孔も同時に打ち抜いて形成することができる。即ち、貫通孔を形成するための別工程を設ける必要がなく、外形を形成する工程と兼用することができるので、ケース部材の製造コストの低減を図ることができるという効果がある。   According to the first aspect, since the through hole is formed through the cylindrical wall portion, there is an effect that the weight of the case member can be reduced. Furthermore, for example, when a flat material is punched into a predetermined outer shape and the case material is formed by pressing the punched material, a through hole is also punched at the same time in the process of punching the flat material. Can be formed. That is, it is not necessary to provide a separate process for forming the through-hole, and the process can be combined with the process of forming the outer shape, so that the manufacturing cost of the case member can be reduced.

請求項2記載のストラットマウントによれば、請求項1記載のストラットマウントの奏する効果に加え、防振基体の突部は、ケース部材の下側壁部に当接される下面側から車体側の部材に当接される上面側へ向かうに従って防振基体の軸直角方向外方への突出量が増加する形状に形成されるので、防振基体を筒壁部へ挿入して内嵌させる際には、防振基体の突部を変形させやすくして、挿入作業性の向上を図ることができると共に、防振基体が筒壁部に内嵌された後は、防振基体の突部を返しとして機能させやすくして、防振基体が筒壁部から抜け出ることを確実に防止できるという効果がある。   According to the strut mount of the second aspect, in addition to the effect achieved by the strut mount according to the first aspect, the protrusion of the vibration isolating base is a member on the vehicle body side from the lower surface side in contact with the lower wall portion of the case member. Since the amount of protrusion of the anti-vibration base outward in the direction perpendicular to the axis increases toward the upper surface side in contact with the base, when inserting the anti-vibration base into the cylindrical wall portion and fitting it inside The protrusion of the anti-vibration base can be easily deformed to improve the insertion workability. After the anti-vibration base is fitted into the cylindrical wall, the protrusion of the anti-vibration base is turned back. It is easy to make it function, and there is an effect that it is possible to reliably prevent the vibration-proof base from coming out of the cylindrical wall portion.

請求項3記載のストラットマウントによれば、請求項1記載のストラットマウントの奏する効果に加え、防振基体の突部は、防振基体の外周面から突出されると共に筒壁部の貫通孔の開口面積よりも小さな断面積の軸部と、その軸部の突出方向先端から張り出すと共に筒壁部の貫通孔の開口面積よりも大きな断面積の張出部とを備えるので、防振基体の突部が筒壁部の貫通孔に挿通された後は、張出部が貫通孔の周縁に係止されることで、防振基体の突部が筒壁部の貫通孔から抜け出ることを防止できる。その結果、防振基体が筒壁部から脱落することを確実に防止できるという効果がある。   According to the strut mount of the third aspect, in addition to the effect produced by the strut mount of the first aspect, the protrusion of the vibration isolating base protrudes from the outer peripheral surface of the vibration isolating base and the through hole of the cylindrical wall portion. Since the shaft portion having a cross-sectional area smaller than the opening area, and the protruding portion having a cross-sectional area larger than the opening area of the through hole of the cylindrical wall portion and projecting from the projecting direction tip of the shaft portion are provided. After the protrusion is inserted into the through hole in the cylinder wall, the overhanging part is locked to the periphery of the through hole to prevent the protrusion of the vibration isolating base from coming out of the through hole in the cylinder wall. it can. As a result, there is an effect that the vibration-proof base can be surely prevented from falling off from the cylindrical wall portion.

また、このように、張出部の断面積が貫通孔の開口面積よりも大きくされることで、貫通孔の隙間(軸部の外周面と貫通孔の内周面との間)を張出部により塞ぐことができるので、外部から筒壁部の内部へ異物が侵入することを防止できるという効果がある。   In addition, as described above, the cross-sectional area of the overhanging portion is made larger than the opening area of the through hole, so that the gap of the through hole (between the outer peripheral surface of the shaft portion and the inner peripheral surface of the through hole) is overhanged. Since it can block | close with a part, there exists an effect that it can prevent that a foreign material penetrate | invades into the inside of a cylinder wall part from the exterior.

請求項4記載のストラットマウントによれば、請求項3記載のストラットマウントの奏する効果に加え、防振基体の突部は、ケース部材の下側壁部に当接される防振基体の下面側へ向けて軸部が下降傾斜して突出されるので、軸部の突出方向先端に張出部が張り出している構成であっても、防振基体を筒壁部へ挿入して内嵌させる際に、防振基体の突部(張出部)を筒壁部の貫通孔内へ案内しやすくすることができると共に、その貫通孔内に案内された突部(張出部)を防振基体の筒壁部への挿入動作に伴って筒壁部の外周面側へ突き抜けやすくすることができるという効果がある。   According to the strut mount of the fourth aspect, in addition to the effect achieved by the strut mount of the third aspect, the protrusion of the vibration isolating base is directed to the lower surface side of the vibration isolating base that is in contact with the lower wall portion of the case member. Since the shaft part protrudes downward and tilts toward the end, even when the overhanging part protrudes from the tip of the shaft part in the protruding direction, the anti-vibration base is inserted into the cylindrical wall part and fitted inside. In addition, it is possible to easily guide the protrusion (overhanging portion) of the vibration isolating base into the through hole of the cylindrical wall portion, and the protrusion (overhanging portion) guided in the through hole can be There is an effect that it can be easily penetrated to the outer peripheral surface side of the cylindrical wall part with the insertion operation to the cylindrical wall part.

本発明の第1実施の形態におけるストラットマウントの断面図である。It is sectional drawing of the strut mount in 1st Embodiment of this invention. (a)は、防振基体の上面図であり、(b)は、図2(a)のIIb−IIb線における防振基体の断面図である。(A) is a top view of a vibration-proof substrate, and (b) is a cross-sectional view of the vibration-proof substrate taken along line IIb-IIb in FIG. 2 (a). (a)は、図2(b)の矢印IIIa方向視における防振基体の側面図であり、(b)は、防振基体の部分拡大断面図である。(A) is a side view of the vibration isolating base as viewed in the direction of arrow IIIa in FIG. 2 (b), and (b) is a partially enlarged sectional view of the vibration isolating base. (a)は、ケース部材の上面図であり、(b)は、図4(a)のIVb−IVb線におけるケース部材の断面図である。(A) is a top view of a case member, (b) is sectional drawing of the case member in the IVb-IVb line | wire of Fig.4 (a). 図4(b)の矢印V方向視におけるケース部材の側面図である。It is a side view of a case member in the arrow V direction view of Drawing 4 (b). (a)は、ストラットマウントの分解断面図であり、(b)は、ストラットマウントの組立断面図である。(A) is an exploded sectional view of a strut mount, (b) is an assembly sectional view of a strut mount. (a)は、第2実施の形態における防振基体の上面図であり、(b)は、図7(a)のVIIb−VIIb線における防振基体の断面図である。(A) is a top view of the vibration proof base in 2nd Embodiment, (b) is sectional drawing of the vibration proof base in the VIIb-VIIb line | wire of Fig.7 (a). (a)は、第2実施の形態におけるストラットマウントの分解断面図であり、(b)は、ストラットマウントの組立断面図である。(A) is an exploded sectional view of the strut mount in the second embodiment, and (b) is an assembled sectional view of the strut mount.

以下、本発明の好ましい実施例について、添付図面を参照して説明する。まず、図1を参照してストラットマウント1の全体構成について説明する。図1は、本発明の第1実施の形態におけるストラットマウント1の断面図であって、車体への装着状態を示す図である。なお、図1では、ピストンロッドR及びナットNの断面視が省略されると共に、ケース部材30と車体パネルBPとを締結固定するボルトの図示が省略される。   Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, the overall configuration of the strut mount 1 will be described with reference to FIG. FIG. 1 is a cross-sectional view of the strut mount 1 according to the first embodiment of the present invention, and shows a state where the strut mount 1 is mounted on a vehicle body. In FIG. 1, the piston rod R and the nut N are not shown in cross-section, and the bolts that fasten and fix the case member 30 and the vehicle body panel BP are omitted.

図1に示すように、ストラットマウント1は、ショックアブソーバのピストンロッドRの先端を車体側に支持する防振装置であり、ピストンロッドRの先端が締結固定される内側部材10と、その内側部材10が内周側に加硫接着される防振基体20と、その防振基体20が内嵌されると共に車体パネルBPに締結固定されるケース部材30とを主に備えて構成される。   As shown in FIG. 1, a strut mount 1 is a vibration isolator that supports the tip of a piston rod R of a shock absorber on the vehicle body side, an inner member 10 to which the tip of the piston rod R is fastened and fixed, and its inner member. 10 mainly includes a vibration isolating base body 20 vulcanized and bonded to the inner peripheral side, and a case member 30 in which the vibration isolating base body 20 is fitted and fixed to the vehicle body panel BP.

内側部材10は、鉄鋼材料やアルミニウム合金などから上面視円形の円盤状に形成され、その中心部には、ショックアブソーバのピストンロッドRの先端を挿通させるための挿通孔10aが穿設される。この挿通孔10aにピストンロッドRの先端が挿通され、ナットNが締結されることで、内側部材10にショックアブソーバが取り付けられる。   The inner member 10 is formed from a steel material, an aluminum alloy, or the like into a circular disk shape when viewed from above, and an insertion hole 10a for inserting the tip of the piston rod R of the shock absorber is formed at the center thereof. The tip of the piston rod R is inserted into the insertion hole 10 a and the nut N is fastened, whereby the shock absorber is attached to the inner member 10.

防振基体20は、ゴム状弾性体から円環状(ドーナツ状)に形成され、その内周側には、内側部材10が外縁部を埋め込んだ状態で加硫接着される。なお、防振基体20の外周面には、複数の突部23が突設され、ケース部材30の筒壁部31に貫通形成された貫通孔35にそれぞれ係合可能とされる。   The anti-vibration base body 20 is formed from a rubber-like elastic body in an annular shape (donut shape), and the inner member 10 is vulcanized and bonded to the inner peripheral side with the outer edge portion embedded. A plurality of protrusions 23 project from the outer peripheral surface of the vibration isolating base 20 and can be respectively engaged with through holes 35 formed through the cylindrical wall 31 of the case member 30.

ケース部材30は、鉄鋼材料からプレス加工により容器状に形成され、防振基体20を収容するための収容部となる筒壁部31及び下側壁部32と、車体パネルBPへの取り付け部となる締結壁部33とを備える。筒壁部31には、その筒壁部31の内側と外側とを連通させる複数の貫通孔35が板厚方向に貫通形成され、防振基体20の突部23がそれぞれ係合可能とされる。   The case member 30 is formed into a container shape from a steel material by press working, and serves as an attachment portion to the cylinder wall portion 31 and the lower wall portion 32 that serve as accommodation portions for accommodating the vibration isolating base 20 and the vehicle body panel BP. Fastening wall 33 is provided. A plurality of through holes 35 that allow the inside and the outside of the cylinder wall portion 31 to communicate with each other are formed in the tube wall portion 31 in the plate thickness direction so that the protrusions 23 of the vibration isolation base 20 can be engaged with each other. .

また、締結壁部33には、内周面にめねじが螺刻された被締結穴33aが形成される。なお、締結壁部33の一部には、下面側(図1下側)へ向けて膨出する部分が形成されており、この膨出部分に被締結穴33aが形成される。これにより、被締結穴33aの締結可能長さが確保される。   The fastening wall portion 33 is formed with a fastening hole 33a in which a female screw is threaded on the inner peripheral surface. In addition, a part that bulges toward the lower surface side (lower side in FIG. 1) is formed in a part of the fastening wall portion 33, and a fastening hole 33a is formed in the bulged part. Thereby, the fastening possible length of the to-be-fastened hole 33a is ensured.

被締結穴33aには、車体パネルBPの挿通孔hに挿通されたボルトが締結される。これにより、締結壁部33が車体パネルBPに接合固定され、ケース部材30が車体に取り付けられる。なお、ケース部材30が車体パネルBPに取り付けられると、それらケース部材30と車体パネルBPとの間で防振基体20が軸方向(図1上下方向)に挟圧(圧縮)される。   A bolt inserted into the insertion hole h of the vehicle body panel BP is fastened to the tightened hole 33a. Thereby, the fastening wall part 33 is joined and fixed to the vehicle body panel BP, and the case member 30 is attached to the vehicle body. When the case member 30 is attached to the vehicle body panel BP, the anti-vibration base body 20 is sandwiched (compressed) in the axial direction (vertical direction in FIG. 1) between the case member 30 and the vehicle body panel BP.

車体パネルBPには、ショックアブソーバのピストンロッドRの先端に対応する位置に、開口部mが開口形成されており、この開口部によって、ナットNをピストンロッドRの先端に締結するための作業空間が確保される。   An opening m is formed in the vehicle body panel BP at a position corresponding to the tip of the piston rod R of the shock absorber, and a work space for fastening the nut N to the tip of the piston rod R through the opening. Is secured.

次いで、図2及び図3を参照して、防振基体20の詳細構成について説明する。図2(a)は、防振基体20の上面図であり、図2(b)は、図2(a)のIIb−IIb線における防振基体20の断面図である。また、図3(a)は、図2(b)の矢印IIIa方向視における防振基体20の側面図であり、図3(b)は、防振基体20の部分拡大断面図である。なお、図3(b)は、図2(b)の一部(突部23近傍)を部分的に拡大した断面図に対応する。   Next, with reference to FIGS. 2 and 3, the detailed configuration of the vibration isolation base 20 will be described. FIG. 2A is a top view of the vibration isolation base 20, and FIG. 2B is a cross-sectional view of the vibration isolation base 20 taken along the line IIb-IIb in FIG. 2A. 3A is a side view of the vibration isolating base 20 as viewed in the direction of arrow IIIa in FIG. 2B, and FIG. 3B is a partial enlarged cross-sectional view of the vibration isolating base 20. As shown in FIG. FIG. 3B corresponds to a cross-sectional view in which a part of FIG. 2B (near the protrusion 23) is partially enlarged.

図2及び図3に示すように、防振基体20は、ピストンロッドRが挿通可能な円環状に形成され、その軸方向(図2(b)上下方向)略中央となる位置に内側部材10が加硫接着される。なお、内側部材10と防振基体20は同心に配置される。防振基体20の上面および下面(図2(b)上側面および下側面)は、軸に対して垂直な平面として形成されると共に、これら各面には、複数(本実施の形態では片面6個)の窪み部21,22がそれぞれ凹設される。各窪み部21,22は、同形状であり、周方向等間隔に配設される。   As shown in FIGS. 2 and 3, the anti-vibration base body 20 is formed in an annular shape through which the piston rod R can be inserted, and the inner member 10 is located at a substantially central position in the axial direction (vertical direction in FIG. 2 (b)). Is vulcanized and bonded. The inner member 10 and the vibration isolation base 20 are disposed concentrically. The upper and lower surfaces (upper side surface and lower side surface of FIG. 2B) of the vibration isolating base 20 are formed as planes perpendicular to the axis, and a plurality of (one side 6 in this embodiment) is provided on each of these surfaces. Cavities 21 and 22 are respectively recessed. Each hollow part 21 and 22 is the same shape, and is arrange | positioned at the circumferential direction equal intervals.

防振基体20の外周面(図3(a)紙面手前側面)には、複数(本実施の形態では3個)の突部23が周方向等間隔となる位置であって同じ高さ位置(図3(a)上下方向位置)にそれぞれ突設される。突部23は、防振基体20をケース部材30の筒壁部31に内嵌させた際に、貫通孔35に挿入されて係合する部位であり(図6参照)、正面視略矩形状(図3(a)参照)に形成されると共に、防振基体20の軸を含む断面視において略三角形状(図3(b)参照)に形成される。   A plurality (three in the present embodiment) of the protrusions 23 are provided at equal intervals in the circumferential direction on the outer peripheral surface (the front side surface of FIG. It protrudes in FIG. 3 (a) up-down direction position), respectively. The protrusion 23 is a part that is inserted into and engaged with the through hole 35 when the vibration isolating base 20 is fitted into the cylindrical wall part 31 of the case member 30 (see FIG. 6), and has a substantially rectangular shape in front view. (See FIG. 3A) and formed in a substantially triangular shape (see FIG. 3B) in a cross-sectional view including the axis of the vibration isolating base 20.

即ち、突部23は、防振基体20の外周面から平行(防振基体20の軸に垂直)に延設される上面23aと、その上面23aの延設方向先端から下降傾斜しつつ延設され防振基体20の外周面に接続される傾斜面23bと、それら上面23a及び傾斜面23bを接続する一対の側面23cとから楔状の突出部位として形成される。なお、一対の側面23cの対向間隔(図3(a)左右方向寸法)は、ケース部材30の筒壁部31に形成される貫通孔35の幅(図5左右方向寸法)よりも小さくされている。   That is, the protrusion 23 extends from the outer peripheral surface of the vibration isolating base 20 in parallel (perpendicular to the axis of the vibration isolating base 20) and is inclined downward from the front end of the upper surface 23a in the extending direction. Then, it is formed as a wedge-shaped projecting portion from an inclined surface 23b connected to the outer peripheral surface of the vibration isolating base 20, and a pair of side surfaces 23c connecting the upper surface 23a and the inclined surface 23b. In addition, the opposing space | interval (FIG. 3 (a) left-right direction dimension) of a pair of side surface 23c is made smaller than the width | variety (FIG. 5 left-right direction dimension) of the through-hole 35 formed in the cylindrical wall part 31 of the case member 30. Yes.

上面23aは、内側部材10の下面(図2(b)下側面)よりも防振基体20の軸方向下方(図2(b)下側)に位置すると共に、防振基体20をケース部材30の筒壁部31に内嵌させた状態(図6(b)の状態)では、貫通孔35の上側(図6(b)上側)の内周面が密着する位置に形成される(図6(b)参照)。   The upper surface 23a is positioned below the anti-vibration base 20 in the axial direction (lower side of FIG. 2 (b)) with respect to the lower surface of the inner member 10 (lower side in FIG. 2 (b)). In the state of being fitted into the cylindrical wall portion 31 (the state of FIG. 6B), the inner peripheral surface on the upper side (upper side of FIG. 6B) of the through-hole 35 is formed in a close contact position (FIG. 6). (See (b)).

これにより、防振基体20をケース部材30の筒壁部31に内嵌させる際には、上面23aが内側部材10よりも下方に位置することで、防振基体20の変形性を確保して(即ち、内側部材10により防振基体20の突部23近傍の変形が阻害されることを抑制して)、貫通孔35内へ突部23を挿入させやすくしつつ、内嵌させた後は、貫通孔35の上側の内周面に上面23aを密着させることで、防振基体20がケース部材30の筒壁部31から脱落することをより確実に抑制できる。   Thus, when the vibration isolating base 20 is fitted into the cylindrical wall portion 31 of the case member 30, the upper surface 23a is positioned below the inner member 10, thereby ensuring the deformability of the vibration isolating base 20. After suppressing the deformation of the vicinity of the protrusion 23 of the vibration isolating base body 20 by the inner member 10, after making the protrusion 23 easily inserted into the through hole 35, The upper surface 23 a is brought into close contact with the inner peripheral surface on the upper side of the through hole 35, so that the vibration isolation base 20 can be more reliably suppressed from falling off the cylindrical wall portion 31 of the case member 30.

径斜面23bは、防振基体20の軸に対する傾斜角が、後述する領域Sc側(図3(b)下側)ではその領域Scと略同一の傾斜角に形成されつつ、上面23a側では領域Scにおける傾斜角よりも緩やかな(小さな)傾斜角に形成されている。これによっても、貫通孔35内へ突部23を挿入させやすくしつつ、防振基体20をケース部材30の筒壁部31内に内嵌させた後は、貫通孔35の上側の内周面に密着した上面23aを突部23全体で支持することができ、その結果、防振基体20がケース部材30の筒壁部31から脱落することをより確実に抑制できる。   The radial inclined surface 23b is formed so that the inclination angle with respect to the axis of the vibration isolating base 20 is substantially the same as the region Sc on the region Sc side (lower side in FIG. 3B), which will be described later, while the region on the upper surface 23a side. It is formed at a gentler (smaller) inclination angle than the inclination angle in Sc. Even after this, the inner peripheral surface on the upper side of the through-hole 35 is obtained after the anti-vibration base 20 is fitted into the cylindrical wall portion 31 of the case member 30 while facilitating the insertion of the protrusion 23 into the through-hole 35. The upper surface 23 a that is in close contact with the projection can be supported by the entire projection 23, and as a result, the vibration-proof base 20 can be more reliably suppressed from falling off the cylindrical wall portion 31 of the case member 30.

防振基体20の外周面は、突部23を含む領域Saが防振基体20の軸と平行に形成される一方、その領域Saよりも防振基体20の上面側および下面側における領域Sb,Scが軸に対して縮径方向へ傾斜して形成される。この場合、突部23は、領域Saの下端において領域Scに接して形成される。   On the outer peripheral surface of the vibration isolating base 20, a region Sa including the protrusions 23 is formed in parallel with the axis of the vibration isolating base 20, while the regions Sb on the upper surface side and the lower surface side of the vibration isolating substrate 20 with respect to the region Sa. Sc is formed so as to be inclined in the direction of diameter reduction with respect to the axis. In this case, the protrusion 23 is formed in contact with the region Sc at the lower end of the region Sa.

なお、防振基体20は、領域Saにおける外径が、ケース部材30の筒壁部31における内径と略同一の寸法に設定される。また、ケース部材30の筒壁部31へ内嵌される前の状態における防振基体20の高さ寸法(図3(a)上下方向寸法)は、車体パネルBPにケース部材30の締結壁部33を締結固定した状態におけるケース部材30の下側壁部32の上面と車体パネルBPの下面との間の対向面間隔(図1上下方向寸法)よりも大きな寸法に設定される。よって、ストラットマウント1の車体への装着状態では、防振基体20は、車体パネルBPとケース部材30の下側壁部32との間で軸方向に挟圧(圧縮)されると共に、ケース部材30の筒壁部31によって縮径方向へ挟圧(圧縮)される(図1参照)。   The anti-vibration base body 20 is set such that the outer diameter in the region Sa is substantially the same as the inner diameter of the cylindrical wall portion 31 of the case member 30. Further, the height dimension (the vertical dimension in FIG. 3 (a)) of the vibration isolator base 20 in the state before being fitted into the cylindrical wall part 31 of the case member 30 is the fastening wall part of the case member 30 on the vehicle body panel BP. The dimension is set to be larger than the facing surface distance (the vertical dimension in FIG. 1) between the upper surface of the lower side wall portion 32 of the case member 30 and the lower surface of the vehicle body panel BP in a state in which 33 is fastened and fixed. Therefore, when the strut mount 1 is mounted on the vehicle body, the vibration isolation base 20 is pressed (compressed) in the axial direction between the vehicle body panel BP and the lower side wall portion 32 of the case member 30, and the case member 30. Is pressed (compressed) in the direction of diameter reduction by the cylindrical wall portion 31 (see FIG. 1).

次いで、図4及び図5を参照して、ケース部材30について説明する。図4(a)は、ケース部材30の上面図であり、図4(b)は、図4(a)のIVb−IVb線におけるケース部材30の断面図である。また、図5は、図4(b)の矢印V方向視におけるケース部材30の側面図である。   Next, the case member 30 will be described with reference to FIGS. 4 and 5. 4A is a top view of the case member 30, and FIG. 4B is a cross-sectional view of the case member 30 taken along the line IVb-IVb in FIG. 4A. FIG. 5 is a side view of the case member 30 as viewed in the direction of arrow V in FIG.

図4及び図5に示すように、ケース部材30は、防振基体20が内嵌(図6参照)される筒状の筒壁部31と、その筒壁部31の軸方向(図4(b)上下方向)下端から軸直角方向内方へ向けて延設される下側壁部32と、その下側壁部32と筒壁部31を挟んで反対側となる筒壁部31の軸方向上端から軸直角方向外方へ向けて延設され車体パネルBPに締結固定される締結壁部33とを備え、全体として深皿容器状に形成される。   As shown in FIGS. 4 and 5, the case member 30 includes a cylindrical cylindrical wall portion 31 in which the vibration isolation base 20 is fitted (see FIG. 6), and an axial direction of the cylindrical wall portion 31 (FIG. b) Vertical direction) Lower side wall 32 extending from the lower end inward in the direction perpendicular to the axis, and the upper end in the axial direction of the cylindrical wall 31 on the opposite side across the lower side wall 32 and the cylindrical wall 31 And a fastening wall portion 33 that extends outward in a direction perpendicular to the axis and is fastened and fixed to the vehicle body panel BP, and is formed in a deep dish container shape as a whole.

筒壁部31には、複数(本実施の形態では3個)の貫通孔35が周方向等間隔となる位置であって同じ高さ位置にそれぞれ貫通形成される。貫通孔35は、筒壁部31に防振基体20を内嵌させた際に、防振基体20の突部23を受け入れるための部位であり(図6参照)、正面視横長の略矩形状(図5参照)に形成される。なお、貫通孔35の矩形形状は、長辺が締結壁部33と平行に配置されると共に、短辺が筒壁部31の軸と平行に配置される。   A plurality (three in the present embodiment) of through holes 35 are formed in the cylindrical wall portion 31 so as to penetrate at the same height position at equal circumferential intervals. The through-hole 35 is a part for receiving the protrusion 23 of the vibration isolating base 20 when the vibration isolating base 20 is fitted into the cylindrical wall part 31 (see FIG. 6), and is a substantially rectangular shape that is horizontally long when viewed from the front. (See FIG. 5). In addition, the rectangular shape of the through hole 35 is arranged such that the long side is parallel to the fastening wall portion 33 and the short side is parallel to the axis of the cylindrical wall portion 31.

ここで、貫通孔35の上側(図5上側)の内周面と下側壁部32との間の軸方向(図5上下方向)における間隔は、防振基体20の突部23における上面23aと防振基体20の下面との間の軸方向(図3(b)上下方向)における間隔(図2及び図3参照)よりも小さくされる。   Here, the interval in the axial direction (vertical direction in FIG. 5) between the inner peripheral surface on the upper side (upper side in FIG. 5) of the through hole 35 and the lower side wall portion 32 is the same as the upper surface 23 a of the protrusion 23 of the vibration isolation base 20. It is made smaller than the interval (see FIGS. 2 and 3) in the axial direction (up and down direction in FIG. 3 (b)) with the lower surface of the vibration isolation base 20.

よって、上述したように、防振基体20をケース部材30の筒壁部31に内嵌させた状態(図6(b)の状態)では、防振基体20における突部23の上面23aよりも下方の部分を、貫通孔35の上側の内周面と下側壁部32の上面との間で軸方向に挟圧(圧縮)させ、貫通孔35の上側の内周面に突部23の上面23aを密着させることができる。その結果、防振基体20の突部23との係合を確実として、防振基体20が筒壁部31から脱落することをより確実に防止できる。   Therefore, as described above, in the state where the vibration isolating base 20 is fitted in the cylindrical wall portion 31 of the case member 30 (the state shown in FIG. 6B), the vibration isolating base 20 is more than the upper surface 23a of the protrusion 23. The lower portion is clamped (compressed) in the axial direction between the upper inner peripheral surface of the through hole 35 and the upper surface of the lower side wall portion 32, and the upper surface of the projection 23 is placed on the inner peripheral surface of the upper portion of the through hole 35. 23a can be adhered. As a result, the anti-vibration base 20 can be reliably engaged with the protrusion 23 and the anti-vibration base 20 can be more reliably prevented from falling off the cylindrical wall portion 31.

下面壁部32の中心部には、正面視円形の挿通孔32aが筒壁部31と同心に穿設され、ショックアブソーバのピストンロッドRが挿通可能とされる。なお、挿通孔32aの内径は、防振基体20(及び内側部材10)の外径よりも小さくされる。また、下面壁部32の上面は、筒壁部31の軸と略直交する平面として形成され、防振基体20の下面を支持する。   An insertion hole 32a having a circular shape when viewed from the front is formed concentrically with the cylindrical wall portion 31 at the center of the lower wall portion 32, so that the piston rod R of the shock absorber can be inserted. The inner diameter of the insertion hole 32a is made smaller than the outer diameter of the vibration isolation base 20 (and the inner member 10). Further, the upper surface of the lower wall portion 32 is formed as a plane substantially orthogonal to the axis of the cylindrical wall portion 31 and supports the lower surface of the vibration isolating base 20.

締結壁部33は、上面視略三角形状に形成され、その三角形の重心が筒壁部31の軸に一致する位置に配設されると共に、筒壁部31の外周面から径方向外方へ向けて離間するに従って下降傾斜する傘状に形成される。また、締結壁部33は、その三角形の各頂部に対応する位置に、被締結穴33aがそれぞれ形成される。即ち、被締結穴33aは、筒壁部31の軸を中心として周方向120度間隔で配置される。   The fastening wall portion 33 is formed in a substantially triangular shape when viewed from above, and is disposed at a position where the center of gravity of the triangle coincides with the axis of the cylindrical wall portion 31 and radially outward from the outer peripheral surface of the cylindrical wall portion 31. It forms in the shape of an umbrella which inclines and descends as it moves away. Further, the fastening wall 33 is formed with a fastening hole 33a at a position corresponding to each apex of the triangle. That is, the fastening holes 33a are arranged at intervals of 120 degrees in the circumferential direction with the axis of the cylindrical wall portion 31 as the center.

このように、ケース部材30には、筒壁部31に貫通孔35が貫通形成されるので、ケース部材30を軽量化して、その分、ストラットマウント1全体としての軽量化を図ることができる。また、ケース部材30は、平板状の素材を所定の外形形状に打ち抜いて、その打ち抜いた素材にプレス加工を施すことで形成されるところ、平板状の素材を打ち抜く工程において、貫通孔35も同時に打ち抜いて形成することができる。即ち、貫通孔35を形成するための別工程を設ける必要がなく、外形を形成する工程と兼用することができるので、ケース部材30の製造コストの低減を図ることができる。   Thus, since the through-hole 35 is formed through the cylindrical wall portion 31 in the case member 30, the case member 30 can be reduced in weight, and the weight of the strut mount 1 as a whole can be reduced accordingly. The case member 30 is formed by punching a flat material into a predetermined outer shape and pressing the punched material. In the step of punching the flat material, the through-hole 35 is simultaneously formed. It can be formed by punching. That is, it is not necessary to provide a separate process for forming the through hole 35, and the process can be combined with the process of forming the outer shape, so that the manufacturing cost of the case member 30 can be reduced.

ここで、筒壁部31に形成される貫通孔35は、筒壁部31の軸を中心として周方向120度間隔で配置されると共に、被締結穴33aに対して、周方向に60度だけ位相をずらした位置に配置される。そのため、上述のようにケース部材30をプレス加工により形成する場合に、貫通孔35の歩留まりや寸法精度を高めることができる。   Here, the through-holes 35 formed in the cylindrical wall part 31 are arranged at intervals of 120 degrees in the circumferential direction around the axis of the cylindrical wall part 31 and are only 60 degrees in the circumferential direction with respect to the fastening holes 33a. It is arranged at a position shifted in phase. Therefore, when the case member 30 is formed by pressing as described above, the yield and dimensional accuracy of the through holes 35 can be increased.

また、本実施の形態では、車体パネルBPの形状に合わせて締結壁部33を傘状(下降傾斜した形状)に形成する必要があり、更に、被締結穴33aの締結長さを確保するために締結壁部33の下面側に膨出部分を形成する必要がある。そのため、ケース部材30の筒壁部31に防振基体20を内嵌させた後、突部23が貫通孔35に適正に係合されているかを作業者の目視やカメラを用いた画像処理により確認する際に、その確認が締結壁部33の膨出部分に阻害される。これに対し、本実施の形態では、上述のように位相をずらすことで、締結壁部33の膨出部分に阻害されずに、突部23及び貫通孔35の係合状態の確認を行うことができる。   Further, in the present embodiment, it is necessary to form the fastening wall portion 33 in an umbrella shape (a shape inclined downward) in accordance with the shape of the vehicle body panel BP, and to secure the fastening length of the fastened hole 33a. It is necessary to form a bulging portion on the lower surface side of the fastening wall portion 33. Therefore, after fitting the vibration-proof base 20 into the cylindrical wall portion 31 of the case member 30, whether the protrusion 23 is properly engaged with the through hole 35 is determined by visual observation of the operator or image processing using a camera. When confirming, the confirmation is obstructed by the bulging portion of the fastening wall portion 33. On the other hand, in the present embodiment, the engagement state of the protrusion 23 and the through hole 35 is confirmed without being disturbed by the bulging portion of the fastening wall portion 33 by shifting the phase as described above. Can do.

次いで、図6を参照して、ストラットマウント1の組立方法および車体への装着方法を説明する。図6(a)は、ストラットマウント1の分解断面図であり、図6(b)は、ストラットマウント1の組立断面図である。   Next, with reference to FIG. 6, a method for assembling the strut mount 1 and a method for mounting it on the vehicle body will be described. 6A is an exploded sectional view of the strut mount 1, and FIG. 6B is an assembled sectional view of the strut mount 1. FIG.

図6(a)に示すように、ストラットマウント1の組み立てに際しては、まず、ケース部材30に対する防振基体20の位相(即ち、筒壁部31の貫通孔35の周方向位置と防振基体20の突部23の周方向位置と)を一致させ、防振基体20をケース部材30の締結壁部33側の開口から軸方向(図6(a)上下方向)に沿って奥側(下面壁部32側)へ挿入することで、図6(b)に示すように、防振基体20をケース部材30の筒壁部31に内嵌させる。これにより、防振基体20の突部23が筒壁部31の貫通孔35に係合され、ストラットマウント1の組み立てが完了する。   As shown in FIG. 6A, when the strut mount 1 is assembled, first, the phase of the vibration isolating base 20 with respect to the case member 30 (that is, the circumferential position of the through hole 35 of the cylindrical wall portion 31 and the vibration isolating base 20 And the anti-vibration base 20 from the opening on the fastening wall 33 side of the case member 30 along the axial direction (vertical direction in FIG. 6A) (the lower wall). By inserting it into the portion 32 side, the vibration-proof base 20 is fitted into the cylindrical wall portion 31 of the case member 30 as shown in FIG. Thereby, the protrusion 23 of the vibration isolating base 20 is engaged with the through hole 35 of the cylindrical wall portion 31, and the assembly of the strut mount 1 is completed.

図6(b)に示すように、ストラットマウント1を組み立てた後は、かかるストラットマウント1を、組立工程から車体への装着工程(例えば、ストラットマウント1を製造する部品メーカから車両を製造する車両メーカ)へ搬送する。   As shown in FIG. 6B, after the strut mount 1 is assembled, the strut mount 1 is assembled from the assembly process to the vehicle body (for example, a vehicle that manufactures a vehicle from a component manufacturer that manufactures the strut mount 1). To the manufacturer.

この搬送においては、上述したように、防振基体20の突部23が筒壁部31の貫通孔35に係合されているので、かかる係合により、防振基体20が筒壁部31から軸方向一側(締結壁部33側の開口側)へ変位することを規制することができる。その結果、ストラットマウント1の搬送中に防振基体20がケース部材30の筒壁部31から脱落することを防止できる。   In this conveyance, as described above, since the protrusion 23 of the vibration isolating base 20 is engaged with the through hole 35 of the cylindrical wall part 31, the vibration isolating base 20 is separated from the cylindrical wall part 31 by this engagement. Displacement to one side in the axial direction (opening side on the fastening wall portion 33 side) can be restricted. As a result, it is possible to prevent the vibration-proof base 20 from dropping from the cylindrical wall portion 31 of the case member 30 during the transport of the strut mount 1.

また、突部23は防振基体20と一体にゴム状弾性体により形成されるので、防振基体20を筒壁部31へ挿入して内嵌させる際には、ゴム状弾性体からなる突部23の変形性を利用して、その挿入作業性の向上を図ることができると共に、防振基体20が筒壁部31に内嵌された後は、突部23及びその近傍を変形(圧縮)させると共にその弾性回復力を利用することで、突部23の上面23aを貫通孔35の内周面に密着させ、防振基体20が筒壁部31から脱落することを確実に防止できる。   In addition, since the protrusion 23 is formed of a rubber-like elastic body integrally with the vibration-proof base 20, when the vibration-proof base 20 is inserted into the cylindrical wall portion 31 and fitted therein, the protrusion made of the rubber-like elastic body is used. The deformability of the portion 23 can be used to improve the insertion workability, and after the vibration-proof base 20 is fitted into the cylindrical wall portion 31, the protrusion 23 and its vicinity are deformed (compressed). ) And utilizing the elastic recovery force, the upper surface 23a of the protrusion 23 is brought into close contact with the inner peripheral surface of the through hole 35, and the vibration-proof base 20 can be reliably prevented from falling off the cylindrical wall portion 31.

装着工程では、まず、ケース部材30の締結壁部33を車体パネルBPに接合し、車体パネルBPの挿通孔hから挿通したボルトを締結壁部33の被締結穴33aに締結固定する。次いで、下側壁部32の挿通孔32aを介してショックアブソーバのピストンロッドRの先端を内側部材10の挿通孔10aに相通し、ナットNにて締結固定する。これにより、ストラットマウント1の車体への装着が完了する(図1参照)。   In the mounting step, first, the fastening wall portion 33 of the case member 30 is joined to the vehicle body panel BP, and the bolt inserted through the insertion hole h of the vehicle body panel BP is fastened and fixed to the fastening hole 33a of the fastening wall portion 33. Next, the tip of the piston rod R of the shock absorber is passed through the insertion hole 10 a of the inner member 10 through the insertion hole 32 a of the lower wall portion 32, and is fastened and fixed by the nut N. This completes the mounting of the strut mount 1 to the vehicle body (see FIG. 1).

この場合、防振基体20の突部23と筒壁部31の貫通孔35との係合により、ケース部材30の筒壁部31に内嵌された防振基体20が周方向へ変位(回転)することを規制することができる。よって、ピストンロッドRを内側部材10に締結固定する際に、内側部材10がケース部材30の筒壁部31内で空転することを防止できる。その結果、ナットNを締結する際の作業性の向上を図ることができる。   In this case, due to the engagement between the protrusion 23 of the vibration isolating base 20 and the through hole 35 of the cylindrical wall 31, the vibration isolating base 20 fitted in the cylindrical wall 31 of the case member 30 is displaced (rotated) in the circumferential direction. ) Can be regulated. Therefore, when the piston rod R is fastened and fixed to the inner member 10, the inner member 10 can be prevented from idling in the cylindrical wall portion 31 of the case member 30. As a result, workability at the time of fastening the nut N can be improved.

以上、説明したように、ストラットマウント1は、従来品において必要とされたアウターリング(外筒金具)を省略することができる(図1参照)。よって、その外筒金具に絞り加工を施す必要がなく、その結果、絞り加工後の寸法検査も不要となるので、その分、製造工数を低減して、製品コストの削減を図ることができる。また、外筒金具を省略できることで、部品点数の削減に伴う部品コストの低減だけでなく、製品の軽量化も図ることができる。   As described above, the strut mount 1 can omit the outer ring (outer cylinder fitting) required in the conventional product (see FIG. 1). Therefore, it is not necessary to perform drawing processing on the outer cylinder fitting, and as a result, dimensional inspection after drawing processing becomes unnecessary, and accordingly, the number of manufacturing steps can be reduced and the product cost can be reduced. In addition, since the outer cylindrical metal fitting can be omitted, not only the cost of parts accompanying the reduction in the number of parts but also the weight of the product can be reduced.

また、このように、外筒金具を省略できれば、ケース部材30の筒壁部31内における限られたスペースにおいて、内側部材10及び防振基体20のためのスペースを確保することができる。よって、内側部材10及び防振基体20の形状の自由度が大きくなるので、その分、これらの設計性を高めて、静的および動的な特性や耐久性の向上を図ることができる。   In addition, if the outer cylinder fitting can be omitted in this way, a space for the inner member 10 and the vibration isolation base 20 can be secured in a limited space in the cylinder wall portion 31 of the case member 30. Therefore, since the degree of freedom of the shape of the inner member 10 and the vibration isolating base 20 is increased, the designability thereof can be improved correspondingly, and the static and dynamic characteristics and durability can be improved.

次いで、図7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、突出方向先端側ほど断面積が小さくなる形状に突部23を形成する場合を例に説明したが、第2実施の形態における突部223は、張出部223bを備え、突出方向先端側の断面積が大きくされる。なお、上述した第1実施の形態と同一の部分には同一の符号を付して、その説明は省略する。   Next, a second embodiment will be described with reference to FIG. In the first embodiment, the case has been described in which the protrusion 23 is formed in a shape having a smaller cross-sectional area toward the front end side in the protrusion direction. However, the protrusion 223 in the second embodiment includes an overhang portion 223b. The cross-sectional area at the front end side in the protruding direction is increased. In addition, the same code | symbol is attached | subjected to the part same as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

図7(a)は、第2実施の形態における防振基体220の上面図であり、図7(b)は、図7(a)のVIIb−VIIb線における防振基体220の断面図である。   FIG. 7A is a top view of the vibration isolation base 220 in the second embodiment, and FIG. 7B is a cross-sectional view of the vibration isolation base 220 taken along the line VIIb-VIIb in FIG. 7A. .

図7に示すように、第2実施の形態における防振基体220は、第1実施の形態における防振基体20に対し、突部223の形状が異なる点を除き、他の構成は同一である。即ち、突部223は、防振基体20の外周面(領域Sa)から防振基体20の下面側(領域Sc側)に下降傾斜しつつ径方向外方へ向けて突出される軸部223aと、その軸部223aの突出先端に位置し軸部223aの外周面から外方へ向けてフランジ状に張り出す張出部223bとを備える。   As shown in FIG. 7, the vibration isolating base 220 in the second embodiment is the same as the anti-vibration base 20 in the first embodiment except that the shape of the protrusions 223 is different. . That is, the protrusion 223 is a shaft portion 223a that protrudes radially outward while tilting downward from the outer peripheral surface (region Sa) of the anti-vibration base 20 to the lower surface side (region Sc side) of the anti-vibration base 20. And an overhanging portion 223b which is located at the projecting tip of the shaft portion 223a and projects outward from the outer peripheral surface of the shaft portion 223a in a flange shape.

軸部223aは、断面円形の棒状体として形成され、その外径は、後述するケース部材230の筒壁部231における貫通孔235の内径よりも小さくされる。また、図7(b)に示す縦断面(防振基体20の軸を含む断面)において、突部223は、軸部223aの軸(突出方向)の延長上に、内側部材10が位置するように形成される。   The shaft portion 223a is formed as a rod-shaped body having a circular cross section, and has an outer diameter smaller than an inner diameter of a through hole 235 in a cylindrical wall portion 231 of the case member 230 described later. Further, in the vertical cross section (cross section including the shaft of the vibration isolation base 20) shown in FIG. 7B, the protrusion 223 is positioned so that the inner member 10 is positioned on the extension of the shaft (projection direction) of the shaft 223a. Formed.

張出部223bは、軸部223aと同心に形成されると共に、軸部223aから離間するに従って外径が漸次小さくなる断面台形のフランジ状体に形成される。張出部223bの外径は、軸部223a側で最大の外径となり、貫通孔235の内径よりも大きくされる一方、軸部223aから最も離間した突出方向先端側で最小の外径となり、貫通孔235の内径よりも小さくされる。なお、本実施の形態では、張出部223bの突出方向先端側における最小の外径が、軸部223aの外径よりも小さくされる。   The overhang portion 223b is formed concentrically with the shaft portion 223a, and is formed into a trapezoidal flange-like body with an outer diameter that gradually decreases as the distance from the shaft portion 223a increases. The outer diameter of the overhang portion 223b is the largest outer diameter on the shaft portion 223a side and is larger than the inner diameter of the through hole 235, while the outer diameter is the smallest on the distal end side in the protruding direction farthest from the shaft portion 223a, The inner diameter of the through hole 235 is made smaller. In the present embodiment, the minimum outer diameter of the protruding portion 223b on the front end side in the protruding direction is made smaller than the outer diameter of the shaft portion 223a.

なお、突部223の外周面から張出部223bまでの長さ(即ち、軸部223aの軸方向(突出方向)に沿う長さ)は、その最大長さ(図7(b)に示す縦断面における軸部223aの上側における長さ)が筒壁部231の板厚よりも大きく、かつ、その最小長さ(図7(b)に示す縦断面における軸部223aの下側における長さ)が筒壁部231の板厚よりも小さいことが好ましい。突部223の貫通孔235への挿入性を確保しつつ、張出部223bにより貫通孔235内へ異物が侵入することを防止するためである。   Note that the length from the outer peripheral surface of the protrusion 223 to the overhang 223b (that is, the length along the axial direction (protruding direction) of the shaft 223a) is the maximum length (the longitudinal section shown in FIG. 7B). The length of the surface on the upper side of the shaft portion 223a) is larger than the plate thickness of the cylindrical wall portion 231, and the minimum length thereof (the length on the lower side of the shaft portion 223a in the longitudinal section shown in FIG. 7B). Is preferably smaller than the plate thickness of the cylindrical wall portion 231. This is to prevent foreign matters from entering the through-hole 235 by the overhanging portion 223b while ensuring the insertion property of the protrusion 223 into the through-hole 235.

次いで、図8を参照して、ストラットマウント201の組立方法および車体への装着方法を説明する。図8(a)は、第2実施の形態におけるストラットマウント201の分解断面図であり、図8(b)は、ストラットマウント201の組立断面図である。   Next, an assembly method of the strut mount 201 and a mounting method to the vehicle body will be described with reference to FIG. FIG. 8A is an exploded cross-sectional view of the strut mount 201 according to the second embodiment, and FIG. 8B is an assembled cross-sectional view of the strut mount 201.

ストラットマウント201の組み立ては、第1実施の形態の場合と同様に、ケース部材230に対する防振基体220の位相(即ち、筒壁部231の貫通孔235の周方向位置と防振基体220の突部223の周方向位置と)を一致させ、防振基体220をケース部材230の締結壁部33側の開口から軸方向(図8(a)上下方向)に沿って奥側(下面壁部32側)へ挿入することで、図8(b)に示すように、防振基体220をケース部材230の筒壁部231に内嵌させる。これにより、防振基体220の突部223が筒壁部231の貫通孔235に係合される。   As in the case of the first embodiment, the strut mount 201 is assembled in the phase of the vibration isolation base 220 with respect to the case member 230 (that is, the circumferential position of the through hole 235 of the cylindrical wall portion 231 and the protrusion of the vibration isolation base 220). And the anti-vibration base 220 from the opening on the fastening wall portion 33 side of the case member 230 along the axial direction (the vertical direction in FIG. 8A) (the lower surface wall portion 32). By inserting the anti-vibration base 220 into the cylindrical wall portion 231 of the case member 230 as shown in FIG. As a result, the protrusion 223 of the vibration isolation base 220 is engaged with the through hole 235 of the cylindrical wall portion 231.

なお、ケース部材230は、その筒壁部231における貫通孔235が、正面視円形の貫通孔として形成される点を除き(即ち、貫通孔235の正面視形状を除き)、他の構成は第1実施の形態におけるケース部材30と同一であるので、その説明は省略する。   The case member 230 has the other configuration except that the through hole 235 in the cylindrical wall portion 231 is formed as a circular through hole in front view (that is, excluding the shape of the through hole 235 in front view). Since it is the same as the case member 30 in 1 embodiment, the description is abbreviate | omitted.

このように、第2実施の形態におけるストラットマウント201においても、突部223と貫通孔235との係合により、第1実施の形態の場合と同様に、その搬送中に防振基体220がケース部材230の筒壁部231から脱落することを防止できると共に、ナットNを締結する際の作業性の向上を図ることができる。   As described above, also in the strut mount 201 in the second embodiment, the vibration-proof base 220 is placed in the case during the conveyance by the engagement between the protrusion 223 and the through hole 235 in the same manner as in the first embodiment. It is possible to prevent the member 230 from falling off the cylindrical wall portion 231 and to improve workability when the nut N is fastened.

この場合、防振基体220の突部223は、筒壁部231の貫通孔235の内径(開口面積)よりも小さな外径(断面積)の軸部223aと、その軸部223aの先端に位置し筒壁部231の貫通孔235の内径よりも大きな外径の張出部223bとを備えるので、かかる突部223が貫通孔235に挿通されると、張出部223bを、筒壁部231の外周面における貫通孔235の周縁に係止させることができる。これにより、突部223が筒壁部231の貫通孔235から抜け出ることを防止して、防振基体220が筒壁部231から脱落することをより確実に防止できる。   In this case, the protrusion 223 of the vibration isolation base 220 is positioned at the shaft portion 223a having an outer diameter (cross-sectional area) smaller than the inner diameter (opening area) of the through hole 235 of the cylindrical wall portion 231 and the tip of the shaft portion 223a. Since the projecting portion 223 is inserted into the through hole 235, the projecting portion 223b is inserted into the cylindrical wall portion 231 because the projecting portion 223 is inserted into the through hole 235. It can be made to latch on the periphery of the through-hole 235 in the outer peripheral surface. Thereby, it can prevent that the protrusion 223 slips out from the through-hole 235 of the cylinder wall part 231, and can prevent more reliably that the vibration proof base 220 falls off from the cylinder wall part 231.

また、このように、張出部223bの外径(断面積)が貫通孔235の内径(開口面積)よりも大きくされることで、貫通孔235の隙間(軸部223aの外周面と貫通孔235の内周面との間)を張出部223bにより塞ぐことができるので、外部から筒壁部231の内部へ異物が侵入することを防止できる。   Further, as described above, the outer diameter (cross-sectional area) of the overhang portion 223b is made larger than the inner diameter (opening area) of the through hole 235, so that the gap between the through hole 235 (the outer peripheral surface of the shaft portion 223a and the through hole). 235 (between the inner peripheral surface of 235) can be closed by the overhanging portion 223b, and foreign matter can be prevented from entering the inside of the cylindrical wall portion 231 from the outside.

更に、防振基体220は、突部223が下降傾斜した状態で形成されるので、軸部223aの突出方向先端に張出部223bが張り出している構成であっても、防振基体220を筒壁部231へ挿入して内嵌させる際には、防振基体220の突部223(特に、張出部223b)を貫通孔235内へ案内しやすくすることができると共に、その貫通孔235内に案内された突部223(張出部233b)を防振基体220の筒壁部231への挿入動作に伴って筒壁部231の外周面側へ突き抜けやすくすることができる。   Further, since the vibration isolating base 220 is formed with the protruding portion 223 inclined downward, the anti-vibration base 220 is formed in a cylindrical shape even when the protruding portion 223b protrudes from the tip of the shaft portion 223a in the protruding direction. When inserted into the wall portion 231 and internally fitted, the projection 223 (particularly, the overhang portion 223b) of the vibration isolation base 220 can be easily guided into the through hole 235, and the inside of the through hole 235 The protruding portion 223 (the overhang portion 233b) guided by the above can be easily penetrated to the outer peripheral surface side of the cylindrical wall portion 231 in accordance with the insertion operation of the vibration isolation base 220 into the cylindrical wall portion 231.

特に、本実施の形態では、張出部223bの突出方向先端側における最小の外径が、貫通孔235の内径よりも小さくされるので、かかる張出部223bを貫通孔235内へ確実に案内させることができる。更に、突部223は、軸部223aの軸(突出方向)の延長上に、内側部材10が位置するように形成されるので、かかる内側部材10の剛性を利用して、突部223(張出部223b)を筒壁部231の外周面側へ確実に抜け出させることができる。   In particular, in the present embodiment, the minimum outer diameter of the protruding portion 223b on the front end side in the protruding direction is made smaller than the inner diameter of the through hole 235, so that the protruding portion 223b is reliably guided into the through hole 235. Can be made. Further, the protrusion 223 is formed so that the inner member 10 is positioned on the extension of the shaft (projection direction) of the shaft portion 223a. Therefore, by utilizing the rigidity of the inner member 10, the protrusion 223 (stretching) is formed. The protruding portion 223b) can be reliably pulled out to the outer peripheral surface side of the cylindrical wall portion 231.

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。   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. It can be easily guessed.

上記各実施の形態で挙げた数値は一例であり、他の数値を採用することは当然可能である。例えば、上記第1実施の形態では、突部23及び貫通孔35をそれぞれ周方向3ヶ所に配設する場合を説明したが、かかる配設個数は一例であり、2ヶ所以下であっても良く、或いは、4ヶ所以上であっても良い。なお、第2実施の形態においても同様である。   The numerical values given in the above embodiments are merely examples, and other numerical values can naturally be adopted. For example, in the first embodiment, the case where the protrusions 23 and the through holes 35 are arranged at three locations in the circumferential direction has been described. However, the number of arrangement is only an example, and the number may be two or less. Alternatively, there may be four or more locations. The same applies to the second embodiment.

上記第2実施の形態では、突部223を下降傾斜させる場合を説明したが、必ずしもこれに限られるものではなく、水平(防振基体220の軸に平行)に形成することは当然可能である。   In the second embodiment, the case where the protrusion 223 is inclined downward has been described. However, the present invention is not necessarily limited to this, and it is naturally possible to form the protrusion 223 horizontally (parallel to the axis of the vibration isolation base 220). .

1,201 ストラットマウント
10 内側部材
20,220 防振基体
23,223 突部
223a 軸部
223b 張出部
30,230 ケース部材
31,231 筒壁部
32 下側壁部
33 締結壁部
35,235 貫通孔
BP 車体パネル(車体の一部、車体側の部材)
R ピストンロッド
1,201 Strut mount 10 Inner member 20,220 Anti-vibration base 23,223 Protruding portion 223a Shaft portion 223b Overhang portion 30,230 Case member 31,231 Cylindrical wall portion 32 Lower side wall portion 33 Fastening wall portion 35,235 Through hole BP body panel (part of the body, body side member)
R piston rod

Claims (4)

ショックアブソーバーのピストンロッドの上端部が締結固定される内側部材と、前記内側部材の外周を取り囲み車体側に取り付けられるケース部材と、前記内側部材とケース部材との間に介在すると共にゴム状弾性体から構成される防振基体と、を備えるストラットマウントにおいて、
前記防振基体は、周方向に分散配置されつつ外周面から前記防振基体の軸直角方向外方へ突出される複数の突部を備えると共に前記内側部材が内周側に加硫接着される円環形状に形成され、
前記ケース部材は、前記防振基体が内嵌される筒状の筒壁部と、前記筒壁部の軸方向一端から軸直角方向外方へ向けて延設され前記車体側に締結固定される締結壁部と、前記筒壁部の軸方向他端から軸直角方向内方へ向けて延設され前記締結壁部が前記車体側に締結固定された場合に前記車体側の部材との間で前記防振基体を前記筒壁部の軸方向に挟圧する下側壁部と、を備え、
前記ケース部材の筒壁部は、前記防振基体の突部に対応する位置に貫通形成された複数の貫通孔を備え、
前記防振基体が前記ケース部材の筒壁部に内嵌されると、前記防振基体の突部が前記筒壁部の貫通孔に係合されることを特徴とするストラットマウント。
An inner member to which the upper end portion of the piston rod of the shock absorber is fastened and fixed; a case member that surrounds the outer periphery of the inner member and attached to the vehicle body; and a rubber-like elastic body that is interposed between the inner member and the case member In a strut mount comprising:
The anti-vibration base includes a plurality of protrusions that are distributed in the circumferential direction and protrude outward from the outer peripheral surface in a direction perpendicular to the axis of the anti-vibration base, and the inner member is vulcanized and bonded to the inner peripheral side. Formed in an annular shape,
The case member has a cylindrical cylindrical wall portion in which the vibration-proof base is fitted, and extends from one axial end of the cylindrical wall portion outward in a direction perpendicular to the axial direction, and is fastened and fixed to the vehicle body side. Between the fastening wall portion and the member on the vehicle body side when the fastening wall portion is fastened and fixed to the vehicle body side extending from the other axial end of the cylindrical wall portion in the direction perpendicular to the axis. A lower side wall portion that clamps the vibration-proof base in the axial direction of the cylindrical wall portion,
The cylindrical wall portion of the case member includes a plurality of through holes formed so as to penetrate at positions corresponding to the protrusions of the vibration-proof base.
The strut mount according to claim 1, wherein when the vibration isolating base is fitted into a cylindrical wall portion of the case member, a protrusion of the vibration isolating base is engaged with a through hole of the cylindrical wall portion.
前記防振基体の突部は、前記ケース部材の下側壁部に当接される前記防振基体の下面側から前記車体側の部材に当接される前記防振基体の上面側へ向かうに従って前記防振基体の軸直角方向外方への突出量が増加する形状に形成されることを特徴とする請求項1記載のストラットマウント。   The projecting portion of the vibration isolating base moves from the lower surface side of the vibration isolating base that is in contact with the lower side wall portion of the case member toward the upper surface side of the vibration isolating base that is in contact with the member on the vehicle body side. 2. The strut mount according to claim 1, wherein the anti-vibration base is formed in a shape in which an amount of protrusion outward in a direction perpendicular to the axis increases. 前記防振基体の突部は、前記防振基体の外周面から突出されると共に前記筒壁部の貫通孔の開口面積よりも小さな断面積の軸部と、前記軸部の突出方向先端から張り出すと共に前記筒壁部の貫通孔の開口面積よりも大きな断面積の張出部とを備えることを特徴とする請求項1記載のストラットマウント。   The projecting portion of the vibration isolating base protrudes from the outer peripheral surface of the vibration isolating base and has a shaft portion having a cross-sectional area smaller than the opening area of the through-hole of the cylindrical wall portion, and extends from the front end of the shaft portion in the projecting direction. The strut mount according to claim 1, further comprising an overhang portion having a cross-sectional area larger than an opening area of the through hole of the cylindrical wall portion. 前記防振基体の突部は、前記ケース部材の下側壁部に当接される前記防振基体の下面側へ向けて前記軸部が下降傾斜して突出されることを特徴とする請求項3記載のストラットマウント。   4. The projecting portion of the vibration-proof base projects from the shaft portion downwardly inclined toward the lower surface side of the vibration-proof base abutted against the lower wall portion of the case member. The described strut mount.
JP2011043052A 2011-02-28 2011-02-28 Strut mount Active JP5629227B2 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57179551U (en) * 1981-05-11 1982-11-13
JPH0669472U (en) * 1993-03-11 1994-09-30 豊生ブレーキ工業株式会社 Cylindrical mount
JP2005201451A (en) * 2004-01-15 2005-07-28 Dr Ing H C F Porsche Ag Bearing for damping member of vehicle
JP2008241004A (en) * 2007-03-29 2008-10-09 Tokai Rubber Ind Ltd Vibration control device and its mounting structure
JP2010014133A (en) * 2008-06-30 2010-01-21 Tokai Rubber Ind Ltd Upper support

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57179551U (en) * 1981-05-11 1982-11-13
JPH0669472U (en) * 1993-03-11 1994-09-30 豊生ブレーキ工業株式会社 Cylindrical mount
JP2005201451A (en) * 2004-01-15 2005-07-28 Dr Ing H C F Porsche Ag Bearing for damping member of vehicle
JP2008241004A (en) * 2007-03-29 2008-10-09 Tokai Rubber Ind Ltd Vibration control device and its mounting structure
JP2010014133A (en) * 2008-06-30 2010-01-21 Tokai Rubber Ind Ltd Upper support

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