JP2008151177A - Strut mount - Google Patents

Strut mount Download PDF

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Publication number
JP2008151177A
JP2008151177A JP2006337121A JP2006337121A JP2008151177A JP 2008151177 A JP2008151177 A JP 2008151177A JP 2006337121 A JP2006337121 A JP 2006337121A JP 2006337121 A JP2006337121 A JP 2006337121A JP 2008151177 A JP2008151177 A JP 2008151177A
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cylindrical portion
cylinder fitting
strut mount
fitting
tapered
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Japanese (ja)
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Akinari Kodama
陽成 児玉
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Priority to JP2006337121A priority Critical patent/JP2008151177A/en
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  • Fluid-Damping Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strut mount suitably securing strength by increasing rigidity of an outer cylinder fitting. <P>SOLUTION: The strut mount 10 is provided with an inner cylinder fitting 1 having a rod 5 of a shock absorber inserted therethrough in an up-and-down direction and connected thereon, the outer cylinder fitting 2 surrounding the inner cylinder fitting 1 in parallel in an axial direction, a rubber elastic body 3 connecting the inner cylinder fitting 1 and the outer cylinder fitting 2. The outer cylinder fitting 2 has a skirt shape expanding to a lower part U, and includes a tapered cylinder part 21 butting on a body panel 7 from the lower part, a large diameter cylinder part 22 provided at a part lower than the tapered cylinder part 21 with keeping an interval and formed in a larger diameter than the tapered cylinder part 21, and a constrictive hollow part 23 depressed in a radial direction inside of the large diameter cylinder part 22, existing between the tapered cylinder part 21 and the large diameter cylinder part 22 and connecting the same. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、緩衝器のロッドが上下方向に挿通されて連結される内筒金具と、その内筒金具を軸平行に取り囲む外筒金具と、両金具を連結するゴム状弾性体とを備えたストラットマウントに関する。   The present invention includes an inner cylinder fitting to which a rod of a shock absorber is inserted and connected in the vertical direction, an outer cylinder fitting that surrounds the inner cylinder fitting in an axis parallel, and a rubber-like elastic body that connects the two fittings. About strut mount.

かかるストラットマウントは、一般に、自動車等の懸架装置において緩衝器の車体への取付部に介装され、車輪側から車体側への振動の伝達を抑制するのに用いられる。ストラットマウントの構造としては種々のものが知られており、例えば下記特許文献1〜3に開示されたものが挙げられる。   Such a strut mount is generally interposed in a mounting portion of a shock absorber to a vehicle body in a suspension device such as an automobile, and is used to suppress transmission of vibration from the wheel side to the vehicle body side. Various structures of strut mounts are known, for example, those disclosed in Patent Documents 1 to 3 below.

図5は、従来のストラットマウントが備える外筒金具の一例を示す断面図である。この外筒金具4は、下方に広がるスカート状をなすテーパ筒部41と、テーパ筒部41よりも大径に形成された大径筒部42と、大径筒部42の下端から径方向外側に張り出したフランジ部43とを備えている。この外筒金具4を備えるストラットマウントは、図6に示すように、車体側部材としてのボディパネル7に下方から当接するように組み付けられ、テーパ筒部41とフランジ部43とがボディパネル7に押し当たって上方向への変位を規制する。   FIG. 5 is a cross-sectional view showing an example of an outer cylinder fitting provided in a conventional strut mount. The outer tubular metal fitting 4 includes a tapered tubular portion 41 having a skirt shape extending downward, a large diameter tubular portion 42 having a larger diameter than the tapered tubular portion 41, and a radially outer side from the lower end of the large diameter tubular portion 42. And a flange portion 43 that protrudes from the surface. As shown in FIG. 6, the strut mount provided with the outer cylindrical metal fitting 4 is assembled so as to come into contact with the body panel 7 as a vehicle body side member from below, and the tapered cylindrical portion 41 and the flange portion 43 are attached to the body panel 7. Press to regulate upward displacement.

しかしながら、ボディパネル7の寸法バラツキなどに起因して、ボディパネル7がフランジ部43に局部的に集中して当接する場合があるため、座屈などの不具合を防ぐべく外筒金具4の肉厚を大きくして強度を確保する必要があった。また、フランジ部43を無くして、ボディパネル7にテーパ筒部41だけを当接させることも考えられるが、この場合にも強度を確保するために肉厚の増加が必要となる。かかる肉厚の増加は、ストラットマウントの重量やコストの増加を招来するため好ましくなく、改善が望まれていた。
特開2001−116078号公報 特開2002−310209号公報 特開2005−161907号公報
However, since the body panel 7 may be locally concentrated on the flange portion 43 due to dimensional variation of the body panel 7 or the like, the wall thickness of the outer tube fitting 4 is prevented to prevent problems such as buckling. It was necessary to increase the strength to ensure the strength. In addition, it is conceivable that the flange portion 43 is eliminated and only the tapered tube portion 41 is brought into contact with the body panel 7, but in this case also, an increase in thickness is required to ensure strength. Such an increase in wall thickness is undesirable because it causes an increase in the weight and cost of the strut mount, and an improvement has been desired.
Japanese Patent Laid-Open No. 2001-116078 JP 2002-310209 A Japanese Patent Laid-Open No. 2005-161907

本発明は、上記実情に鑑みてなされたものであり、その目的は、外筒金具の剛性を高めて強度を好適に確保することができるストラットマウントを提供することにある。   This invention is made | formed in view of the said situation, The objective is to provide the strut mount which can ensure the intensity | strength suitably by improving the rigidity of an outer cylinder metal fitting.

上記目的は、下記の如き構成の本発明により達成することができる。即ち、本発明に係るストラットマウントは、緩衝器のロッドが上下方向に挿通されて連結される内筒金具と、前記内筒金具を軸平行に取り囲む外筒金具と、前記内筒金具と前記外筒金具とを連結するゴム状弾性体とを備えるストラットマウントにおいて、前記外筒金具が、下方に広がるスカート状をなし、車体側部材に下方から押し当たるテーパ筒部と、前記テーパ筒部よりも下方に間隔を設けて配され、前記テーパ筒部よりも大径に形成された大径筒部と、前記大径筒部よりも径方向内側に凹み、前記テーパ筒部と前記大径筒部との間に介在して両者を連ねる絞り凹部とを有するものである。   The above object can be achieved by the present invention having the following configuration. In other words, the strut mount according to the present invention includes an inner cylinder fitting to which a rod of a shock absorber is inserted and connected in the vertical direction, an outer cylinder fitting that surrounds the inner cylinder fitting in an axis parallel, the inner cylinder fitting and the outer cylinder fitting. In a strut mount comprising a rubber-like elastic body that connects a cylindrical metal fitting, the outer cylindrical metal fitting has a skirt shape that extends downward, and a tapered cylindrical portion that presses against a vehicle body side member from below, and more than the tapered cylindrical portion. A large-diameter cylindrical portion that is arranged at a lower interval and is formed to have a larger diameter than the tapered cylindrical portion, and is recessed radially inward from the large-diameter cylindrical portion, and the tapered cylindrical portion and the large-diameter cylindrical portion And a concavity for constricting both of them.

本発明に係るストラットマウントでは、外筒金具が下方に広がるスカート状をなすテーパ筒部を有しており、そのテーパ筒部が車体側部材に下方から押し当たることで上方向の変位が規制される。そして、そのテーパ筒部の下方に配された大径筒部が、その大径筒部よりも径方向内側に凹んだ絞り凹部を介して、テーパ筒部に連ねられていることにより、外筒金具の軸方向の剛性が高められ、特に肉厚を増加させることなく強度を好適に確保することができる。   In the strut mount according to the present invention, the outer cylindrical metal fitting has a tapered cylindrical portion that spreads downward, and the upward displacement is regulated by pressing the tapered cylindrical portion against the vehicle body side member from below. The Then, the large-diameter cylindrical portion disposed below the tapered cylindrical portion is connected to the tapered cylindrical portion via a constriction concave portion that is recessed inward in the radial direction from the large-diameter cylindrical portion. The rigidity in the axial direction of the metal fitting is enhanced, and the strength can be suitably ensured without particularly increasing the wall thickness.

上記において、前記絞り凹部が、全周にわたり軸方向に延在して前記テーパ筒部に連なる縦壁部分を有するものが好ましい。かかる構成によれば、軸方向に延在する縦壁部分がテーパ筒部の下方に全周にわたって連なるため、車体側部材に下方から押し当たるテーパ筒部の軸方向の剛性を効果的に高めることができる。   In the above, it is preferable that the throttle recess has a vertical wall portion extending in the axial direction over the entire circumference and continuing to the tapered tube portion. According to such a configuration, since the vertical wall portion extending in the axial direction is continuous over the entire circumference below the tapered cylindrical portion, the axial rigidity of the tapered cylindrical portion that presses against the vehicle body side member from below is effectively increased. Can do.

上記において、前記内筒金具が、軸方向に対する角度が45°となる軸傾斜方向に前記ゴム状弾性体を挟んで前記外筒金具と対向する円弧部を有し、無負荷状態にて、前記絞り凹部の変曲点が、前記円弧部の中心を通って前記軸傾斜方向に延びる仮想ラインから下方に位置するものが好ましい。   In the above, the inner cylinder fitting has an arc portion facing the outer cylinder fitting across the rubber-like elastic body in an axial inclination direction in which an angle with respect to the axial direction is 45 °, and in an unloaded state, It is preferable that the inflection point of the aperture recess is located below a virtual line extending in the axial inclination direction through the center of the arc portion.

上方向への振動入力時にゴム状弾性体が同方向に弾性変形した際、外筒金具には径方向外側に向かう分力が作用するが、上記構成によれば、絞り凹部の変曲点が上記仮想ラインから下方の位置にあることにより、径方向外側に向かう分力を変曲点から上方の部分、即ちテーパ筒部に作用させることができる。その結果、外筒金具の広がり変位を防止して、強度を良好に確保することができる。これに対して、絞り凹部の変曲点が上記仮想ラインよりも上方の位置にあると、径方向外側に向かう分力が変曲点から下方の部分、即ち大径筒部に作用する場合があるため、外筒金具が広がり変位を起こし易くなる。   When the rubber-like elastic body is elastically deformed in the same direction when an upward vibration is input, a component force acting radially outward acts on the outer tube fitting. By being in a position below the imaginary line, a component force directed outward in the radial direction can be applied to an upper portion from the inflection point, that is, a tapered tube portion. As a result, it is possible to prevent the outer cylindrical fitting from being spread and displaced, and to ensure good strength. On the other hand, if the inflection point of the aperture recess is at a position above the imaginary line, the component force directed radially outward may act on the portion below the inflection point, that is, the large-diameter cylindrical portion. For this reason, the outer cylinder fitting spreads and is likely to be displaced.

また、上記構成によれば、車両に組み付ける前の無負荷状態において、絞り凹部の変曲点を上記の如く配置していることから、車両に組み付けた状態では、絞り凹部の変曲点をより確実に上記仮想ラインから下方に位置させることができ、強度を好適に確保することができる。なお、「仮想ラインから下方」には、変曲点が仮想ライン上にある場合を含めるものとする。   Further, according to the above configuration, the inflection point of the throttle recess is arranged as described above in the no-load state before being assembled to the vehicle. It can be surely positioned below the virtual line, and the strength can be suitably secured. Note that “below the virtual line” includes a case where the inflection point is on the virtual line.

上記において、前記テーパ筒部の外表面を被覆する薄肉のゴム膜と、前記ゴム膜の表面に周方向に隔設された複数のゴム突起とを備えるものが好ましい。かかる構成によれば、テーパ筒部の外表面が薄肉のゴム膜によって被覆されていることにより、テーパ筒部を車体側部材にフィットさせ易くなり、外筒金具の強度を確保し易くなる。また、ゴム膜の表面に複数のゴム突起が周方向に隔設されていることにより、テーパ筒部が車体側部材に押し当たる際の異音の発生を低減することができる。   In the above, it is preferable to include a thin rubber film that covers the outer surface of the tapered cylindrical portion, and a plurality of rubber protrusions that are circumferentially spaced on the surface of the rubber film. According to such a configuration, since the outer surface of the tapered cylindrical portion is covered with the thin rubber film, the tapered cylindrical portion can be easily fitted to the vehicle body side member, and the strength of the outer cylindrical fitting can be easily secured. Further, since the plurality of rubber protrusions are circumferentially provided on the surface of the rubber film, it is possible to reduce the generation of abnormal noise when the tapered cylindrical portion is pressed against the vehicle body side member.

上記において、前記ゴム膜に、前記テーパ筒部の外表面を部分的に露出させる露出部が周方向に隔設されているものが好ましい。ゴム状弾性体を成形する際には内筒金具と外筒金具との相対位置関係が重要であるが、上記構成によれば、ゴム状弾性体を成形するための加硫型に外筒金具をセットする際に、露出部となるテーパ筒部の一部にて外筒金具を支持することができ、両金具の位置決めを適切に行うことができる。これに対して、図5に示した外筒金具のテーパ筒部の外表面全域をゴム膜で被覆する場合、外筒金具をフランジ部で支持しなければならず、強度確保の観点から好ましくない。   In the above, it is preferable that the rubber film has an exposed portion that partially exposes the outer surface of the tapered tube portion in the circumferential direction. When molding a rubber-like elastic body, the relative positional relationship between the inner cylinder metal fitting and the outer cylinder metal fitting is important. According to the above configuration, the outer cylinder metal fitting is added to the vulcanization mold for molding the rubber-like elastic body. When setting the outer metal fitting, the outer cylinder fitting can be supported by a part of the tapered cylindrical portion serving as the exposed portion, and the positioning of both fittings can be performed appropriately. On the other hand, when the entire outer surface of the tapered tube portion of the outer tube fitting shown in FIG. 5 is covered with a rubber film, the outer tube fitting must be supported by the flange portion, which is not preferable from the viewpoint of securing strength. .

以下、本発明の実施の形態について図面を参照しながら説明する。図1は、本発明に係るストラットマウントの一例を示す縦断面図である。図2は、ストラットマウントが備える外筒金具の縦断面図である。図3は、ストラットマウントの上面図であり、そのA−O−A矢視断面が図1となる。図4は、車両に組み付けたストラットマウントの縦断面図であり、フリー状態を左側に、2600Nの荷重を負荷した状態を右側に示している。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an example of a strut mount according to the present invention. FIG. 2 is a vertical cross-sectional view of the outer cylinder fitting provided in the strut mount. FIG. 3 is a top view of the strut mount, and FIG. 1 is a cross-sectional view taken along the line A-O-A. FIG. 4 is a longitudinal sectional view of the strut mount assembled to the vehicle, showing the free state on the left side and the state with a load of 2600 N applied on the right side.

ストラットマウント10は、緩衝器のロッド5が上下方向LDに挿通されて連結される内筒金具1と、内筒金具1を軸平行に取り囲む外筒金具2と、内筒金具1と外筒金具2とを連結するゴム状弾性体3とを備える。内筒金具1及び外筒金具2は、例えば鋼材により形成することができる。また、ゴム状弾性体3としては、自動車用防振ゴムの技術分野における公知のゴム材料を限定なく使用することができる。   The strut mount 10 includes an inner cylinder fitting 1 in which a shock absorber rod 5 is inserted and connected in the vertical direction LD, an outer cylinder fitting 2 that surrounds the inner cylinder fitting 1 in an axial parallel manner, an inner cylinder fitting 1 and an outer cylinder fitting. And a rubber-like elastic body 3 connecting the two. The inner cylinder fitting 1 and the outer cylinder fitting 2 can be formed of, for example, a steel material. Moreover, as the rubber-like elastic body 3, a known rubber material in the technical field of automobile vibration-proof rubber can be used without limitation.

内筒金具1は、周壁11が波状に延びた下方Uに広がるスカート状をなし、内表面12が薄肉のゴム膜32により被覆されている。内筒金具1は、その上端にロッド5を挿通させるための開口部13を有しているとともに、その内部にベアリング6を収容できるように構成されている。円弧部14は、内筒金具1の軸方向中央部にて周壁11の一部を構成している。   The inner cylinder 1 has a skirt shape in which the peripheral wall 11 extends in a downward U shape extending in a wave shape, and the inner surface 12 is covered with a thin rubber film 32. The inner cylinder 1 has an opening 13 for inserting the rod 5 at the upper end thereof, and is configured to accommodate the bearing 6 therein. The arc portion 14 constitutes a part of the peripheral wall 11 at the central portion in the axial direction of the inner cylindrical metal fitting 1.

ゴム状弾性体3は、後述する仮想ラインLを略中央として軸傾斜方向CDに沿って延びる本体部31を備える。本体部31は、内筒金具1の開口部13近傍から上広がりで延びる上面34と、内筒金具1の円弧部14の下部近傍から上広がりで延びる下面35とを有している。内筒金具1の円弧部14は、軸傾斜方向CDにゴム状弾性体3の本体部31を挟んで外筒金具2に対向している。なお、軸傾斜方向CDは、ストラットマウント10の軸方向ADに対する角度θが45°となる方向である。   The rubber-like elastic body 3 includes a main body 31 that extends along an axial inclination direction CD with a virtual line L, which will be described later, as a substantial center. The main body 31 has an upper surface 34 that extends upward from the vicinity of the opening 13 of the inner cylinder fitting 1 and a lower surface 35 that extends upward from the vicinity of the lower part of the arc portion 14 of the inner cylinder fitting 1. The circular arc portion 14 of the inner cylindrical metal fitting 1 is opposed to the outer cylindrical metal fitting 2 with the main body 31 of the rubber-like elastic body 3 sandwiched in the axial inclination direction CD. The axis tilt direction CD is a direction in which the angle θ with respect to the axial direction AD of the strut mount 10 is 45 °.

外筒金具2は、図1、2に示すように下方Uに広がるスカート状をなすテーパ筒部21と、テーパ筒部21よりも下方Uに間隔を設けて配され、テーパ筒部21よりも大径に形成された大径筒部22と、大径筒部22よりも径方向内側に凹み、テーパ筒部21と大径筒部22との間に介在して両者を連ねる絞り凹部23とを有し、ボディパネル7(車体側部材の一例)の凹所71に嵌入可能に構成されている。大径筒部22の下端は、径方向外側に僅かに湾曲してゴム状弾性体3に埋設されており、図5の外筒金具4のようなフランジ部43は形成されていない。   As shown in FIGS. 1 and 2, the outer cylinder fitting 2 is provided with a tapered cylindrical portion 21 having a skirt shape extending downward U, and a space below the tapered cylindrical portion 21 with a space U. A large-diameter cylindrical portion 22 formed to have a large diameter, and a constricted concave portion 23 that is recessed radially inward from the large-diameter cylindrical portion 22 and that is interposed between the tapered cylindrical portion 21 and the large-diameter cylindrical portion 22 to connect the two. It is comprised so that it can insert in the recess 71 of the body panel 7 (an example of a vehicle body side member). The lower end of the large-diameter cylindrical portion 22 is slightly curved radially outward and embedded in the rubber-like elastic body 3, and the flange portion 43 like the outer cylindrical metal fitting 4 of FIG. 5 is not formed.

絞り凹部23は、断面L字形をなしつつ、その屈曲する部分は円弧により形成されている。絞り凹部23は、全周にわたって軸方向ADに延在する縦壁部分23aを有し、その縦壁部分23aがテーパ筒部21の下端に連なっている。このようなテーパ筒部21、大径筒部22及び絞り凹部23を有する外筒金具2は、例えば鋼板にプレス成形を施すことにより容易且つ効率的に成形することができる。   The diaphragm recess 23 has an L-shaped cross section, and the bent portion is formed by an arc. The aperture recess 23 has a vertical wall portion 23 a extending in the axial direction AD over the entire circumference, and the vertical wall portion 23 a is continuous with the lower end of the tapered tube portion 21. The outer tube fitting 2 having such a tapered tube portion 21, the large-diameter tube portion 22, and the narrowed recess portion 23 can be easily and efficiently formed by, for example, pressing a steel plate.

テーパ筒部21は、その外表面を薄肉のゴム膜33により被覆されており、ゴム膜33の表面には、図3に示すように複数のゴム突起36が周方向に隔設されている。本実施形態では、周方向に略等間隔で16個のゴム突起36が隔設され、各々がテーパ筒部21の傾斜方向に沿って放射状に延び、その両端で高さを漸減させている。ゴム突起36は、振動入力時の異音防止効果を適切に発揮する観点から、少なくともテーパ筒部21の径方向外側に設けられていることが好ましい。   The outer surface of the tapered cylindrical portion 21 is covered with a thin rubber film 33, and a plurality of rubber protrusions 36 are circumferentially arranged on the surface of the rubber film 33 as shown in FIG. 3. In the present embodiment, sixteen rubber protrusions 36 are spaced apart at substantially equal intervals in the circumferential direction, each extending radially along the inclined direction of the tapered tube portion 21, and gradually decreasing in height at both ends thereof. The rubber protrusions 36 are preferably provided at least on the radially outer side of the tapered cylindrical portion 21 from the viewpoint of appropriately exhibiting the effect of preventing noise during vibration input.

更に、ゴム膜33には、テーパ筒部21の外表面を部分的に露出させる露出部37が周方向に隔設されている。本実施形態では、周方向に略等間隔で8個の露出部37が隔設され、各々がテーパ筒部21の傾斜方向に沿って放射状に延び、ゴム突起36の間に配されている。   Further, the rubber film 33 is provided with an exposed portion 37 that partially exposes the outer surface of the tapered cylindrical portion 21 in the circumferential direction. In the present embodiment, eight exposed portions 37 are provided at substantially equal intervals in the circumferential direction, each extending radially along the inclined direction of the tapered cylindrical portion 21, and disposed between the rubber protrusions 36.

ストラットマウント10は、内筒金具1及び外筒金具2を加硫型にセットし、その加硫型内のキャビティに未加硫のゴム組成物を供給し、熱や圧力を一定時間加えて加硫することにより成形できる。このとき、上述したゴム膜32、33やゴム突起36となる空所をキャビティに設けておくことで、それらを同時に成形することができる。加硫型内では、内筒金具1が上端の一部にて、外筒金具2が露出部37となるテーパ筒部21の一部にて、それぞれ位置決めされた状態で支持される。   The strut mount 10 sets the inner cylinder fitting 1 and the outer cylinder fitting 2 in a vulcanization mold, supplies an unvulcanized rubber composition to a cavity in the vulcanization mold, and applies heat and pressure for a certain period of time. It can be molded by vulcanization. At this time, by providing spaces in the cavity for the rubber films 32 and 33 and the rubber protrusions 36 described above, they can be molded simultaneously. In the vulcanization mold, the inner cylinder fitting 1 is supported in a positioned state at a part of the upper end, and the outer cylinder fitting 2 is supported by a part of the tapered cylinder portion 21 that becomes the exposed portion 37.

ストラットマウント10は、図4に示すように、その軸方向ADが上下になるように車両に組み付けられる。内筒金具1にはロッド5が挿通されるとともに、そのロッド5の上端部にナット51を螺合することでストッパープレート8が取り付けられる。ストッパープレート8の径方向外側端には、ボディパネル7の上壁部72に当接するゴム当接部81が設けられ、これにより下方向への過大な変位を規制することができる。ストラットマウント10の下方には、コイルスプリングのばね受けとしてのスプリングシート9が配され、そのスプリングシート9と内筒金具1との間にベアリング6が収容される。   As shown in FIG. 4, the strut mount 10 is assembled to the vehicle such that its axial direction AD is up and down. A rod 5 is inserted into the inner cylinder 1 and a stopper plate 8 is attached by screwing a nut 51 into the upper end of the rod 5. A rubber abutting portion 81 that abuts against the upper wall portion 72 of the body panel 7 is provided at the radially outer end of the stopper plate 8, thereby restricting excessive displacement in the downward direction. A spring seat 9 serving as a spring receiver for the coil spring is disposed below the strut mount 10, and the bearing 6 is accommodated between the spring seat 9 and the inner cylinder fitting 1.

ボディパネル7は、ロッド5に向かってフランジ状に延出する上壁部72と、下方Uに広がるスカート状をなす周壁部73とからなる凹所71を備える。この凹所71にストラットマウント10が嵌め込まれ、外筒金具2のテーパ筒部21が下方Uから押し当たる。凹所71の内部は、ゴム状弾性体3の本体部31によって大部分が占有され、これにより上方向への過大な変位を規制することができる。   The body panel 7 includes a recess 71 including an upper wall portion 72 extending in a flange shape toward the rod 5 and a peripheral wall portion 73 having a skirt shape extending downward U. The strut mount 10 is fitted into the recess 71, and the tapered tubular portion 21 of the outer tubular fitting 2 is pressed from below U. Most of the inside of the recess 71 is occupied by the main body portion 31 of the rubber-like elastic body 3, thereby restricting excessive displacement in the upward direction.

ストラットマウント10は、ボディパネル7に対して非締結状態で組み付けられる。外筒金具2は、車体の重みによって凹所71の内面に押し当てられるだけでなく、振動入力時には凹所71の内面に強く押圧されて上方向への変位を規制する。外筒金具2は、主としてテーパ筒部21にて凹所71の内面に押し当たるが、絞り凹部23を介して大径筒部22に連なることから軸方向ADの剛性が高く、強度を好適に確保することができる。また、本実施形態では、絞り凹部23が軸方向ADに延在する縦壁部分を23aを有するため、テーパ筒部21の軸方向ADの剛性が全周にわたり効果的に高められている。なお、大径筒部22の上部も凹所71の内面に当接しうるが、大径筒部22は軸方向ADに延在するために座屈等の問題は生じ難い。   The strut mount 10 is assembled to the body panel 7 in an unfastened state. The outer tube fitting 2 is not only pressed against the inner surface of the recess 71 due to the weight of the vehicle body, but is also strongly pressed against the inner surface of the recess 71 during vibration input to restrict upward displacement. The outer tube fitting 2 is pressed against the inner surface of the recess 71 mainly by the tapered tube portion 21, but is connected to the large diameter tube portion 22 through the throttle recess portion 23, so that the rigidity in the axial direction AD is high and the strength is suitably set. Can be secured. Moreover, in this embodiment, since the aperture | diaphragm | squeeze recessed part 23 has the vertical wall part 23a extended in the axial direction AD, the rigidity of the axial direction AD of the taper cylinder part 21 is effectively improved over the perimeter. Although the upper portion of the large-diameter cylindrical portion 22 can also contact the inner surface of the recess 71, the large-diameter cylindrical portion 22 extends in the axial direction AD, so that problems such as buckling hardly occur.

本実施形態では、図1に示すように、内筒金具1が、軸方向ADに対する角度θが45°となる軸傾斜方向CDにゴム状弾性体3を挟んで外筒金具2と対向する円弧部14を有し、無負荷状態にて、絞り凹部23の変曲点Pが、円弧部14の中心を通って軸傾斜方向CDに延びる仮想ラインLから下方Uに位置している。このように絞り凹部23の変曲点Pが仮想ラインLから下方Uの位置にあることによって、車両に組み付けられた状態では、図4に示すように変曲点Pの相対位置が更に下方に配される。   In the present embodiment, as shown in FIG. 1, the inner cylindrical metal fitting 1 has an arc facing the outer cylindrical metal fitting 2 with the rubber-like elastic body 3 sandwiched in the axial inclination direction CD where the angle θ with respect to the axial direction AD is 45 °. In an unloaded state, the inflection point P of the throttle recess 23 is located below the imaginary line L extending in the axial inclination direction CD through the center of the arc portion 14. Thus, when the inflection point P of the aperture recess 23 is located at a position U below the virtual line L, the relative position of the inflection point P is further lowered as shown in FIG. Arranged.

そして、上方向への振動入力時にゴム状弾性体3が同方向に弾性変形した際、内筒金具1の円弧部14が、軸方向ADに対する角度θが45°となる軸傾斜方向CDにゴム状弾性体3を挟んで外筒金具2と対向することから、外筒金具2には、上方に向かう分力と径方向外側に向かう分力とが作用するが、上述のように変曲点Pが仮想ラインLから下方Uの位置にあることにより、その径方向外側に向かう分力を、主として変曲点Pから上方の部分、即ちテーパ筒部21に作用させることができる。その結果、外筒金具2の広がり変位を防止して、強度を良好に確保することができる。   When the rubber-like elastic body 3 is elastically deformed in the same direction at the time of vibration input in the upward direction, the circular arc portion 14 of the inner cylindrical metal fitting 1 is rubber in the axial inclination direction CD where the angle θ with respect to the axial direction AD is 45 ° Since the outer cylindrical metal fitting 2 is opposed to the outer cylindrical metal fitting 2 with the elastic member 3 interposed therebetween, a component force directed upward and a component force directed outward in the radial direction act on the outer cylindrical metal fitting 2. Since P is located at a position U below the imaginary line L, a component force directed outward in the radial direction can be applied mainly to an upper portion from the inflection point P, that is, the tapered tube portion 21. As a result, it is possible to prevent the outer cylindrical fitting 2 from being spread and displaced, and to ensure good strength.

これに対して、絞り凹部23の変曲点Pが、円弧部14の中心を通って軸傾斜方向CDに延びる仮想ラインLよりも上方の位置にあると、径方向外側に向かう分力が変曲点Pから下方Uの部分、即ち大径筒部22に作用する場合があり、凹所71の内面に当接するテーパ筒部21又は大径筒部22の上部を支点として、外筒金具2が広がり変位を起こし易くなる。かかる外筒金具2の広がり変位は、強度確保の観点から回避することが好ましい。なお、絞り凹部23の変曲点Pは、無負荷状態にて仮想ラインL上にあってもよいが、上記効果をより確実に発現させる観点から、仮想ラインLよりも下方Uに位置することが好ましい。   On the other hand, when the inflection point P of the aperture recess 23 is above the virtual line L extending in the axial inclination direction CD through the center of the arc portion 14, the component force toward the radially outer side is changed. The outer cylindrical fitting 2 may act on the portion U below the bending point P, that is, on the large-diameter cylindrical portion 22, with the tapered cylindrical portion 21 contacting the inner surface of the recess 71 or the upper portion of the large-diameter cylindrical portion 22 as a fulcrum. Spreads and tends to cause displacement. It is preferable to avoid the spread displacement of the outer cylinder fitting 2 from the viewpoint of securing strength. Note that the inflection point P of the aperture recess 23 may be on the virtual line L in an unloaded state, but is located below the virtual line L from the viewpoint of more surely expressing the above effect. Is preferred.

本実施形態では、テーパ筒部21の外表面がゴム膜33によって被覆されていることから、テーパ筒部21を凹所71の内面にフィットさせ易く、外筒金具2の強度を確保できる。更に、ゴム膜33の表面に多数のゴム突起36が設けられていることから、ゴム膜33と凹所71の内面とが完全に面接触することを抑制し、スティックスリップ等による異音の発生を良好に低減することができる。   In the present embodiment, since the outer surface of the tapered cylindrical portion 21 is covered with the rubber film 33, the tapered cylindrical portion 21 can be easily fitted to the inner surface of the recess 71, and the strength of the outer cylindrical fitting 2 can be ensured. Furthermore, since a large number of rubber protrusions 36 are provided on the surface of the rubber film 33, it is possible to suppress the rubber film 33 and the inner surface of the recess 71 from coming into full surface contact and to generate abnormal noise due to stick-slip or the like. Can be reduced satisfactorily.

本発明は上述した実施形態に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更が可能である。ストラットマウントの形状や構造、ゴム状弾性体の特性、ゴム突起の形状や個数などは使用する用途に応じて適宜に変更することができる。   The present invention is not limited to the embodiments described above, and various improvements and modifications can be made without departing from the spirit of the present invention. The shape and structure of the strut mount, the characteristics of the rubber-like elastic body, the shape and number of the rubber protrusions, and the like can be changed as appropriate according to the intended use.

本発明に係るストラットマウントの一例を示す縦断面図1 is a longitudinal sectional view showing an example of a strut mount according to the present invention. ストラットマウントが備える外筒金具の縦断面図Longitudinal cross-sectional view of the outer tube fitting provided in the strut mount ストラットマウントの上面図Top view of strut mount 車両に組み付けたストラットマウントの縦断面図Vertical section of the strut mount assembled to the vehicle 従来のストラットマウントが備える外筒金具の一例を示す断面図Sectional drawing which shows an example of the outer cylinder metal fitting with which the conventional strut mount is equipped 図5の外筒金具を備えるストラットマウントを車両に組み付けたときの要部断面図Sectional drawing of the principal part when the strut mount provided with the outer cylinder fitting of FIG. 5 is assembled to the vehicle.

符号の説明Explanation of symbols

1 内筒金具
2 外筒金具
3 ゴム状弾性体
5 ロッド
6 ベアリング
7 ボディパネル(車体側部材)
10 ストラットマウント
14 円弧部
21 テーパ筒部
22 大径筒部
23 絞り凹部
23a 縦壁部分
33 ゴム膜
36 ゴム突起
37 露出部
AD 軸方向
CD 軸傾斜方向
L 仮想ライン
LD 上下方向
P 絞り凹部の変曲点
U 下方
DESCRIPTION OF SYMBOLS 1 Inner cylinder metal fitting 2 Outer cylinder metal fitting 3 Rubber-like elastic body 5 Rod 6 Bearing 7 Body panel (vehicle body side member)
DESCRIPTION OF SYMBOLS 10 Strut mount 14 Arc part 21 Tapered cylinder part 22 Large diameter cylinder part 23 Restriction recessed part 23a Vertical wall part 33 Rubber film 36 Rubber protrusion 37 Exposed part AD Axial direction CD Axis inclination direction L Virtual line LD Vertical direction P Point U down

Claims (5)

緩衝器のロッドが上下方向に挿通されて連結される内筒金具と、前記内筒金具を軸平行に取り囲む外筒金具と、前記内筒金具と前記外筒金具とを連結するゴム状弾性体とを備えるストラットマウントにおいて、
前記外筒金具が、
下方に広がるスカート状をなし、車体側部材に下方から押し当たるテーパ筒部と、
前記テーパ筒部よりも下方に間隔を設けて配され、前記テーパ筒部よりも大径に形成された大径筒部と、
前記大径筒部よりも径方向内側に凹み、前記テーパ筒部と前記大径筒部との間に介在して両者を連ねる絞り凹部とを有することを特徴とするストラットマウント。
An inner cylinder fitting in which the rod of the shock absorber is inserted and connected in the vertical direction, an outer cylinder fitting that surrounds the inner cylinder fitting in an axially parallel manner, and a rubber-like elastic body that connects the inner cylinder fitting and the outer cylinder fitting In a strut mount comprising:
The outer cylinder fitting is
A tapered skirt that forms a skirt that extends downward, and presses against the vehicle body side member from below,
A large-diameter cylindrical portion that is arranged with a gap below the tapered cylindrical portion and is formed with a larger diameter than the tapered cylindrical portion;
A strut mount comprising: a concavity that is recessed radially inward from the large-diameter cylindrical portion, and that is interposed between the tapered cylindrical portion and the large-diameter cylindrical portion to connect the two.
前記絞り凹部が、全周にわたり軸方向に延在して前記テーパ筒部に連なる縦壁部分を有する請求項1記載のストラットマウント。   The strut mount according to claim 1, wherein the throttle recess has a vertical wall portion extending in the axial direction over the entire circumference and continuing to the tapered cylindrical portion. 前記内筒金具が、軸方向に対する角度が45°となる軸傾斜方向に前記ゴム状弾性体を挟んで前記外筒金具と対向する円弧部を有し、
無負荷状態にて、前記絞り凹部の変曲点が、前記円弧部の中心を通って前記軸傾斜方向に延びる仮想ラインから下方に位置する請求項1又は2記載のストラットマウント。
The inner cylinder fitting has an arcuate portion facing the outer cylinder fitting across the rubber-like elastic body in an axial inclination direction in which an angle with respect to the axial direction is 45 °;
3. The strut mount according to claim 1, wherein an inflection point of the aperture recess is located below an imaginary line extending in the axial inclination direction through the center of the arc portion in an unloaded state.
前記テーパ筒部の外表面を被覆する薄肉のゴム膜と、前記ゴム膜の表面に周方向に隔設された複数のゴム突起とを備える請求項1〜3いずれか1項に記載のストラットマウント。   The strut mount of any one of Claims 1-3 provided with the thin rubber film which coat | covers the outer surface of the said taper cylinder part, and several rubber protrusion spaced apart by the circumferential direction on the surface of the said rubber film. . 前記ゴム膜に、前記テーパ筒部の外表面を部分的に露出させる露出部が周方向に隔設されている請求項4記載のストラットマウント。   The strut mount according to claim 4, wherein an exposed portion that partially exposes an outer surface of the tapered cylindrical portion is provided in the circumferential direction in the rubber film.
JP2006337121A 2006-12-14 2006-12-14 Strut mount Withdrawn JP2008151177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006337121A JP2008151177A (en) 2006-12-14 2006-12-14 Strut mount

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010276108A (en) * 2009-05-28 2010-12-09 Kurashiki Kako Co Ltd Strut mount
KR20200036602A (en) * 2018-09-28 2020-04-07 현대자동차주식회사 Insulator assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010276108A (en) * 2009-05-28 2010-12-09 Kurashiki Kako Co Ltd Strut mount
KR20200036602A (en) * 2018-09-28 2020-04-07 현대자동차주식회사 Insulator assembly
KR102529387B1 (en) 2018-09-28 2023-05-04 현대자동차 주식회사 Insulator assembly

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