JP5234197B2 - Plain bearing - Google Patents

Plain bearing Download PDF

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JP5234197B2
JP5234197B2 JP2012023522A JP2012023522A JP5234197B2 JP 5234197 B2 JP5234197 B2 JP 5234197B2 JP 2012023522 A JP2012023522 A JP 2012023522A JP 2012023522 A JP2012023522 A JP 2012023522A JP 5234197 B2 JP5234197 B2 JP 5234197B2
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annular
outer peripheral
plate portion
diameter
case
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JP2012097904A (en
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和幸 宮田
亮平 金子
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Oiles Corp
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Oiles Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein

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  • Vehicle Body Suspensions (AREA)
  • Sliding-Contact Bearings (AREA)
  • Sealing Of Bearings (AREA)

Description

本発明は、滑り軸受、特に四輪自動車におけるストラット型サスペンション（マクファーソン式）のスラスト滑り軸受として組み込まれて好適な滑り軸受に関する。   The present invention relates to a sliding bearing, and more particularly to a sliding bearing suitable for being incorporated as a thrust sliding bearing of a strut type suspension (McPherson type) in a four-wheeled vehicle.

例えば特許文献１においては、合成樹脂製の下ケースと、この下ケースに重ねられた合成樹脂製の上ケースと、上及び下ケース間に配された合成樹脂製のスラスト滑り軸受片と、上及び下ケース間において外周側に配された弾性シール手段とを具備しており、弾性シール手段は、下ケースの外周側に取り付けられた円筒状本体部と、この円筒状本体部の一端側から折り返されて徐々に拡径して円筒状本体部の他端側に向かって伸び、円筒状本体部と同軸であって円筒状本体部の外側に配されて、上ケースの外筒部の内周面に弾性的に当接している環状の弾性リップ部と、下ケースの下面外周側に形成された環状の段部凹所に配されており、円筒状本体部の他端から一体的に伸びていると共に内周端に環状リップを有した鍔部とを備えている滑り軸受が提案されている。   For example, in Patent Document 1, a synthetic resin lower case, a synthetic resin upper case stacked on the lower case, a synthetic resin thrust sliding bearing piece disposed between the upper and lower cases, And an elastic sealing means disposed on the outer peripheral side between the lower case, and the elastic sealing means includes a cylindrical main body attached to the outer peripheral side of the lower case, and one end side of the cylindrical main body. Folded and gradually expanded in diameter and extended toward the other end of the cylindrical main body, and coaxial with the cylindrical main body and arranged on the outer side of the cylindrical main body. An annular elastic lip portion elastically contacting the peripheral surface and an annular stepped recess formed on the outer peripheral surface of the lower surface of the lower case are integrated from the other end of the cylindrical main body portion. A slide having an extension and a collar with an annular lip at the inner peripheral end Bearing has been proposed.

特開平８−３２６７５８号公報JP-A-8-326758

ところで、斯かる滑り軸受では、例えば、下ケースの下面に当接する相手部材が板金加工されてなるばね座からなる場合には、板金加工されてなるばね座の製作精度が低い傾向にあるために、下ケースとばね座との間に不要な隙間が生じて塵埃、雨水、泥水等が侵入する虞があり、ひいては、弾性シール手段と下ケースとの間を介してスラスト滑り軸受片が配される下ケースと上ケースとの間の環状空間に塵埃、雨水、泥水等が侵入する虞がある。   By the way, in such a sliding bearing, for example, when the mating member that contacts the lower surface of the lower case is made of a spring seat processed by sheet metal, the manufacturing accuracy of the spring seat processed by sheet metal tends to be low. In addition, an unnecessary gap may be formed between the lower case and the spring seat, and dust, rainwater, muddy water, etc. may enter, and as a result, a thrust slide bearing piece is disposed between the elastic seal means and the lower case. There is a risk that dust, rainwater, muddy water, etc. may enter the annular space between the lower case and the upper case.

本発明は、前記諸点に鑑みてなされたものであり、その目的とするところは、下ケースに当接する相手部材の製作精度が低い場合においても、下ケースと相手部材との間への塵埃、雨水、泥水等の侵入、ひいては、下ケースと上ケースとの間への塵埃、雨水、泥水等の侵入をより高いシール性をもって防止することができる滑り軸受を提供することにある。   The present invention has been made in view of the above points, and the object of the present invention is to provide dust between the lower case and the mating member, even when the manufacturing accuracy of the mating member contacting the lower case is low, An object of the present invention is to provide a slide bearing capable of preventing intrusion of rainwater, muddy water, and the like, and consequently intrusion of dust, rainwater, muddy water, etc. between the lower case and the upper case with higher sealing performance.

本発明の滑り軸受は、環状下面を有した上ケースと、この上ケースに当該上ケースの軸心の回りで回転自在となるように重ね合わされると共に上ケースの環状下面に対面した環状上面を有した下ケースと、環状下面及び環状上面間の環状空間に配された環状のスラスト滑り軸受片と、環状空間の外周側に配されたシール手段とを具備しており、シール手段は、環状空間の外周側を密閉するように上ケースと下ケースとの間に配されている外周シール部と、この外周シール部の下面に形成されていると共に下ケースの下面に当接する相手部材に向かって突出した環状の弾性突起部とを具備している。   The sliding bearing of the present invention has an upper case having an annular lower surface, and an annular upper surface which is superimposed on the upper case so as to be rotatable around the axis of the upper case and faces the annular lower surface of the upper case. A lower case, an annular thrust slide bearing piece arranged in an annular space between the annular lower surface and the annular upper surface, and a sealing means arranged on the outer peripheral side of the annular space. An outer peripheral seal portion disposed between the upper case and the lower case so as to seal the outer peripheral side of the space, and a mating member formed on the lower surface of the outer peripheral seal portion and in contact with the lower surface of the lower case. And an annular elastic projecting portion protruding.

本発明の滑り軸受によれば、特に、シール手段が、外周シール部の下面に形成されていると共に下ケースの下面に当接する相手部材に向かって突出した環状の弾性突起部を具備しているために、下ケースに当接する相手部材の製作精度が低い場合においても、当該弾性突起部を相手部材に弾性的に当接させることで、下ケースと相手部材との間に不要な隙間、特に下ケースと上ケースとの間に通じる隙間を生じさせずに当該下ケースと相手部材との間への塵埃、雨水、泥水等の侵入、ひいては、下ケースと上ケースとの間への塵埃、雨水、泥水等の侵入をより高いシール性をもって防止することができる。   According to the slide bearing of the present invention, in particular, the sealing means includes an annular elastic protrusion that is formed on the lower surface of the outer peripheral seal portion and protrudes toward the mating member that contacts the lower surface of the lower case. Therefore, even when the manufacturing accuracy of the mating member that contacts the lower case is low, an unnecessary gap between the lower case and the mating member, in particular, by making the elastic protrusion elastically contact the mating member, Intrusion of dust, rainwater, muddy water, etc. between the lower case and the mating member without creating a gap between the lower case and the upper case, as a result, dust between the lower case and the upper case, Intrusion of rainwater, muddy water, etc. can be prevented with higher sealing performance.

本発明の滑り軸受の好ましい例では、上ケースは、環状下面を有した上側環状板部と、この上側環状板部の外周面側の下面に一体的に形成された上側外筒部とを具備しており、下ケースは、環状上面を有した下側環状板部を具備しており、この下側環状板部は、大径環状板部と、大径環状板部の下面に一体的に形成された小径環状板部とを具備しており、大径環状板部の下面及び小径環状板部の外周面は、互いに協働して下ケースの外周面側の下面に環状段部を形成しており、外周シール部は、下側環状板部に嵌着若しくは固着されている断面Ｌ字状であって環状の芯金と、芯金に当該芯金を覆うように固着されている環状の弾性シール部材とを具備しており、弾性シール部材は、芯金を覆うように当該芯金に固着された環状本体と、この環状本体の外周側に配されて当該環状本体の上端に一体的に形成されていると共に環状空間の外周側を密閉するように上側外筒部の内周面に滑接する可撓性を有した外側薄肉環状突縁部と、環状本体の内周側に配されて当該環状本体の下端に一体的に形成されていると共に環状空間の外周側を密閉するように環状段部に滑接する可撓性を有した内側薄肉環状突縁部とを具備している。このような好ましい例によれば、弾性突起部により下ケースとこの下ケースの下面に当接する相手部材との間への塵埃、雨水、泥水等の侵入を防止することができ、しかも、内側薄肉環状突縁部により下ケースと上ケースとの間への塵埃、雨水、泥水等の侵入を防止することができ、而して、より高いシール性をもって塵埃、雨水、泥水等の侵入を防止することができる。   In a preferred example of the slide bearing according to the present invention, the upper case includes an upper annular plate portion having an annular lower surface, and an upper outer cylinder portion integrally formed on the lower surface on the outer peripheral surface side of the upper annular plate portion. The lower case includes a lower annular plate portion having an annular upper surface, and the lower annular plate portion is integrally formed with the large-diameter annular plate portion and the lower surface of the large-diameter annular plate portion. The lower surface of the large-diameter annular plate portion and the outer peripheral surface of the small-diameter annular plate portion cooperate with each other to form an annular step portion on the lower surface on the outer peripheral surface side of the lower case. The outer peripheral seal portion has an L-shaped cross-section that is fitted or fixed to the lower annular plate portion, and an annular core metal that is fixed to the core metal so as to cover the core metal The elastic seal member includes an annular main body fixed to the core metal so as to cover the core metal, and the ring. A flexible outer surface arranged on the outer peripheral side of the main body and integrally formed at the upper end of the annular main body and slidingly contacting the inner peripheral surface of the upper outer cylinder portion so as to seal the outer peripheral side of the annular space A thin annular projecting edge portion and a flexibility which is arranged on the inner peripheral side of the annular main body and is formed integrally with the lower end of the annular main body and slides on the annular stepped portion so as to seal the outer peripheral side of the annular space. And an inner thin-walled annular projecting edge portion. According to such a preferable example, it is possible to prevent the entry of dust, rainwater, muddy water, etc. between the lower case and the mating member in contact with the lower surface of the lower case by the elastic protrusion, and the inner thin wall The annular protrusion can prevent the intrusion of dust, rainwater, muddy water, etc. between the lower case and the upper case, thus preventing the entry of dust, rainwater, muddy water, etc. with higher sealing performance. be able to.

本発明の滑り軸受の好ましい例では、外側薄肉環状突縁部は、上側外筒部に近接するに連れて次第に上側環状板部から離反するように傾斜しており、外側薄肉環状突縁部の最大径は、上側外筒部の内周面の径よりも大きいか又は当該径と同径である。このような好ましい例によれば、外側薄肉環状突縁部が上側外筒部から離反する虞をなくすことができて、高いシール性を発揮し得る。   In a preferred example of the slide bearing of the present invention, the outer thin annular projecting edge portion is inclined so as to gradually move away from the upper annular plate portion as it approaches the upper outer cylindrical portion. The maximum diameter is larger than or equal to the diameter of the inner peripheral surface of the upper outer cylinder portion. According to such a preferable example, there is no possibility that the outer thin annular projecting edge portion is separated from the upper outer cylinder portion, and high sealing performance can be exhibited.

本発明の滑り軸受の好ましい例では、内側薄肉環状突縁部は、小径環状板部の外周面に近接するに連れて次第に上側環状板部から離反するように傾斜しており、内側薄肉環状突縁部の最小径は、小径環状板部の外周面の径よりも小さいか又は当該径と同径である。このような好ましい例によれば、内側薄肉環状突縁部によっても高いシール性を発揮し得る。   In a preferred example of the sliding bearing of the present invention, the inner thin annular projecting edge portion is inclined so as to gradually move away from the upper annular plate portion as it approaches the outer peripheral surface of the small diameter annular plate portion. The minimum diameter of the edge portion is smaller than or equal to the diameter of the outer peripheral surface of the small-diameter annular plate portion. According to such a preferable example, high sealing performance can be exhibited also by the inner thin annular projecting edge.

本発明の滑り軸受の好ましい例では、弾性突起部は、外周シール部の下面に一体的に形成された小径の環状突起部と、外周シール部の下面に一体的に形成されていると共に小径の環状突起部よりも外側に配された大径の環状突起部とを具備している。このような好ましい例によれば、小径の環状突起部及び大径の環状突起部の夫々がばね座に当接する小径環状板部よりも外周側に配されるので、ばね座と下側環状板部との間であって特に小径の環状突起部及び大径の環状突起部よりも下側環状板部の内周側に塵埃、雨水、泥水等が侵入すること、ひいては塵埃、雨水、泥水等が環状段部、大径環状板部及び外周シール部間を介して環状空間に侵入することをも防止している。また、このような好ましい例によれば、小径の環状突起部及び大径の環状突起部によりばね座と下ケースとの相対的な滑りを抑えて、上ケースとスラスト滑り軸受片間及び／又は下ケースとスラスト滑り軸受片間の良好な滑りを長期にわたって維持できる。   In a preferred example of the sliding bearing of the present invention, the elastic protrusion is formed of a small-diameter annular protrusion integrally formed on the lower surface of the outer peripheral seal portion, and is formed integrally on the lower surface of the outer peripheral seal portion and has a small diameter. A large-diameter annular projection disposed outside the annular projection. According to such a preferable example, since each of the small-diameter annular projection and the large-diameter annular projection is arranged on the outer peripheral side with respect to the small-diameter annular plate abutting against the spring seat, the spring seat and the lower annular plate are arranged. Dust, rainwater, muddy water, etc. intrude into the inner peripheral side of the lower annular plate part, especially between the small-diameter annular projection part and the large-diameter annular projection part. Is also prevented from entering the annular space through the space between the annular stepped portion, the large-diameter annular plate portion and the outer peripheral seal portion. Further, according to such a preferred example, the relative slip between the spring seat and the lower case is suppressed by the small-diameter annular projection and the large-diameter annular projection, and / or between the upper case and the thrust slide bearing piece and / or Good sliding between the lower case and the thrust sliding bearing piece can be maintained for a long time.

本発明の滑り軸受の好ましい例では、外周シール部及び弾性突起部は、架橋ゴム又は熱可塑性エラストマーからなる。   In a preferred example of the slide bearing of the present invention, the outer peripheral seal portion and the elastic projection portion are made of a crosslinked rubber or a thermoplastic elastomer.

本発明の滑り軸受の好ましい例では、上ケース及び下ケースのうちの少なくともいずれか一方は合成樹脂製であり、上ケース及び下ケースのうちの少なくともいずれか一方を形成する合成樹脂は、ポリアセタール樹脂、ポリアミド樹脂、ポリエステル樹脂、ポリオレフィン樹脂、ポリカーボネート樹脂及びフッ素樹脂のうちの少なくとも一つを含む。   In a preferred example of the slide bearing of the present invention, at least one of the upper case and the lower case is made of a synthetic resin, and the synthetic resin forming at least one of the upper case and the lower case is a polyacetal resin. And at least one of polyamide resin, polyester resin, polyolefin resin, polycarbonate resin and fluororesin.

本発明の滑り軸受の好ましい例では、スラスト滑り軸受片は合成樹脂製であり、スラスト滑り軸受片を形成する合成樹脂は、ポリアセタール樹脂、ポリアミド樹脂、ポリエステル樹脂、ポリオレフィン樹脂、ポリカーボネート樹脂及びフッ素樹脂のうちの少なくとも一つを含む。   In a preferred example of the sliding bearing of the present invention, the thrust sliding bearing piece is made of a synthetic resin, and the synthetic resin forming the thrust sliding bearing piece is a polyacetal resin, a polyamide resin, a polyester resin, a polyolefin resin, a polycarbonate resin, or a fluororesin. Including at least one of them.

本発明の滑り軸受の好ましい例では、環状空間の内周側に配されたシール手段を更に具備している。   In a preferred example of the slide bearing of the present invention, a seal means arranged on the inner peripheral side of the annular space is further provided.

本発明によれば、下ケースに当接する相手部材の製作精度が低い場合においても、下ケースと相手部材との間への塵埃、雨水、泥水等の侵入、ひいては、下ケースと上ケースとの間への塵埃、雨水、泥水等の侵入をより高いシール性をもって防止することができる滑り軸受を提供し得る。   According to the present invention, even when the manufacturing accuracy of the mating member that comes into contact with the lower case is low, the entry of dust, rainwater, muddy water, etc., between the lower case and the mating member, and consequently the lower case and the upper case. It is possible to provide a plain bearing that can prevent intrusion of dust, rainwater, muddy water, and the like between them with higher sealing performance.

図１は、本発明の実施の形態の例の断面説明図である。FIG. 1 is an explanatory cross-sectional view of an example of an embodiment of the present invention. 図２は、図１に示す例の一部拡大断面説明図である。FIG. 2 is a partially enlarged cross-sectional explanatory view of the example shown in FIG. 図３は、図１に示す例の一部拡大断面説明図である。FIG. 3 is a partially enlarged cross-sectional explanatory view of the example shown in FIG. 図４は、図１に示す例の下面側の一部拡大説明図である。4 is a partially enlarged explanatory view of the lower surface side of the example shown in FIG. 図５は、図１に示す例の使用に関する一部拡大断面説明図である。FIG. 5 is a partially enlarged cross-sectional explanatory diagram regarding the use of the example shown in FIG. 図６は、本発明の実施の形態の他の例の一部拡大断面説明図である。FIG. 6 is a partially enlarged cross-sectional explanatory view of another example of the embodiment of the present invention. 図７は、本発明の実施の形態の他の例の一部拡大断面説明図である。FIG. 7 is a partially enlarged cross-sectional explanatory view of another example of the embodiment of the present invention.

次に、本発明の実施の形態の例を、図に示す例に基づいて更に詳細に説明する。尚、本発明はこれら例に何等限定されないのである。   Next, an example of an embodiment of the present invention will be described in more detail based on an example shown in the figure. The present invention is not limited to these examples.

図１から図５において、本例の滑り軸受１は、環状下面２を有した上ケース３と、上ケース３に当該上ケース３の軸心Ｏの回りで回転自在となるように重ね合わせると共に上ケース３の環状下面２に対面した環状上面４を有した下ケース５と、環状下面２及び環状上面４間の環状空間６に配された環状のスラスト滑り軸受片７と、環状空間６の外周側に配されたシール手段８と、環状空間６の内周側に配されたシール手段９とを具備している。   1 to 5, the sliding bearing 1 of the present example is overlaid with an upper case 3 having an annular lower surface 2 and the upper case 3 so as to be rotatable around the axis O of the upper case 3. A lower case 5 having an annular upper surface 4 facing the annular lower surface 2 of the upper case 3, an annular thrust slide bearing piece 7 disposed in the annular space 6 between the annular lower surface 2 and the annular upper surface 4, Sealing means 8 disposed on the outer peripheral side and sealing means 9 disposed on the inner peripheral side of the annular space 6 are provided.

上ケース３は、前記環状下面２を有した円環状の上側環状板部１１と、上側環状板部１１の外周面１２側の下面１３（環状下面２を含む）に一体的に形成された円筒状の大径の上側外筒部１４と、上側外筒部１４の下面１６側の内周面１５の部位に一体的に形成された円環状の環状膨大部１８と、上側環状板部１１の内周面１９側の下面１３に一体的に形成された円筒状の小径の上側内筒部２１とを具備している。   The upper case 3 is a cylinder formed integrally with an annular upper annular plate portion 11 having the annular lower surface 2 and a lower surface 13 (including the annular lower surface 2) on the outer peripheral surface 12 side of the upper annular plate portion 11. A large-diameter upper outer cylindrical portion 14, an annular annular enormous portion 18 integrally formed on a portion of the inner peripheral surface 15 on the lower surface 16 side of the upper outer cylindrical portion 14, and the upper annular plate portion 11. A cylindrical small-diameter upper inner cylinder portion 21 formed integrally with the lower surface 13 on the inner peripheral surface 19 side is provided.

環状下面２は、スラスト滑り軸受片７の環状の上面２６にＲ方向に関して滑動自在に接している。   The annular lower surface 2 is in slidable contact with the annular upper surface 26 of the thrust slide bearing piece 7 in the R direction.

上側外筒部１４の内周面１５は、上側環状板部１１から離反するに従って拡径する部位を有しており、本例では、上側環状板部１１から環状膨大部１８までの内周面１５の部位１７が当該上側環状板部１１から環状膨大部１８に向かって漸次拡径している。   The inner peripheral surface 15 of the upper outer cylinder portion 14 has a portion that increases in diameter as it separates from the upper annular plate portion 11. In this example, the inner peripheral surface from the upper annular plate portion 11 to the annular enormous portion 18. Fifteen portions 17 gradually increase in diameter from the upper annular plate portion 11 toward the annular enormous portion 18.

環状膨大部１８は、径方向において上ケース３の外側から内側に向かって膨出して形成されており、このように形成されているために上側環状板部１１から下方に向かって漸次縮径した部位を有している。   The annular enormous portion 18 is formed to bulge from the outer side of the upper case 3 toward the inner side in the radial direction, and is gradually reduced in diameter downward from the upper annular plate portion 11 because of being formed in this way. Has a site.

上側内筒部２１は、下ケース５の下側筒部３４に挿入されており、上側内筒部２１によって画されている中央孔９１には、ピストンロッド等からなる軸体が挿通されるようになっている。   The upper inner cylinder portion 21 is inserted into the lower cylinder portion 34 of the lower case 5, and a shaft body made of a piston rod or the like is inserted into the central hole 91 defined by the upper inner cylinder portion 21. It has become.

下ケース５は、環状上面４を有した円環状の下側環状板部３１と、下側環状板部３１の内周面３２側の下面３３に一体的に形成された円筒状の下側筒部３４とを具備している。   The lower case 5 is a cylindrical lower tube formed integrally with an annular lower annular plate portion 31 having an annular upper surface 4 and a lower surface 33 on the inner peripheral surface 32 side of the lower annular plate portion 31. Part 34.

下側環状板部３１は、大径環状板部３６と、大径環状板部３６の下面３３ａに一体的に形成された小径環状板部３７とを具備している。   The lower annular plate portion 31 includes a large-diameter annular plate portion 36 and a small-diameter annular plate portion 37 that is integrally formed on the lower surface 33 a of the large-diameter annular plate portion 36.

大径環状板部３６の上面４１には、環状上面４としての底面を有した円環状の環状窪み部４２が形成されている。環状窪み部４２には、スラスト滑り軸受片７が配されるようになっている。環状上面４は、スラスト滑り軸受片７の環状の下面２７にＲ方向に関して滑動自在に接している。   On the upper surface 41 of the large-diameter annular plate portion 36, an annular annular recess 42 having a bottom surface as the annular upper surface 4 is formed. A thrust slide bearing piece 7 is arranged in the annular recess 42. The annular upper surface 4 is in slidable contact with the annular lower surface 27 of the thrust sliding bearing piece 7 in the R direction.

小径環状板部３７の外周面４３ｂ及び大径環状板部３６の下面３３ａは、互いに協働して下ケース５の外周面４３側の下面３３に外周シール部６１の下部が配される環状段部４４を形成している。   The outer peripheral surface 43b of the small-diameter annular plate portion 37 and the lower surface 33a of the large-diameter annular plate portion 36 cooperate with each other so that the lower portion of the outer peripheral seal portion 61 is disposed on the lower surface 33 on the outer peripheral surface 43 side of the lower case 5. A portion 44 is formed.

下側筒部３４の内周面５１は、上側内筒部２１の外周面２５にＲ方向に関して滑動自在に接している。このように下側筒部３４の内周面５１と上側内筒部２１の外周面２５とが滑接している部位は、ラジアル軸受部５０として形成されている。   The inner peripheral surface 51 of the lower cylindrical portion 34 is in contact with the outer peripheral surface 25 of the upper inner cylindrical portion 21 so as to be slidable in the R direction. In this way, a portion where the inner peripheral surface 51 of the lower cylindrical portion 34 and the outer peripheral surface 25 of the upper inner cylindrical portion 21 are in sliding contact is formed as a radial bearing portion 50.

尚、下側環状板部３１の下面３３及び下側筒部３４の外周面５２には、図５に示すように、板金加工されてなる相手部材、例えばストラット型サスペンションアセンブリにおけるコイルばねの上部のばね座５３が当接するようになっている。   Incidentally, on the lower surface 33 of the lower annular plate portion 31 and the outer peripheral surface 52 of the lower cylindrical portion 34, as shown in FIG. 5, a mating member processed by sheet metal, for example, an upper portion of a coil spring in a strut type suspension assembly is provided. The spring seat 53 comes into contact.

スラスト滑り軸受片７には、例えば図２に示すように、シリコーン系グリース等のグリースが配されるグリース溜め溝６０が形成されていてもよい。スラスト滑り軸受片７はその環状の上面２６で環状下面２に滑接すると共にその環状の下面２７で環状上面４に滑接するようになっている。また、スラスト滑り軸受片７は、例えば図７に示すように、環状の上面２６に一体的に形成されていると共に環状下面２に滑接する二つ以上の円環状突出部２８と、環状の下面２７に一体的に形成されていると共に環状上面４に滑接する二つ以上の円環状突出部３８とを具備していてもよい。スラスト滑り軸受片７と上ケース３及び／又は下ケース５との間には、例えば図７に示すように、スラスト滑り軸受片７と上ケース３及び／又は下ケース５とのうちの少なくともいずれか一方に滑動自在に接する環状のシート５９が介在されていてもよい。斯かるシート５９は、例えば０．０５ｍｍから１．０ｍｍの厚みを有しており、ポリアミド樹脂、ポリエステル樹脂、ポリオレフィン樹脂、ポリカーボネート樹脂及びフッ素樹脂のうちの少なくとも一つを含む合成樹脂からなっている。シート５９と円環状突出部２８及び／又は円環状突出部３８とによって閉塞される閉塞凹所６３には、グリースが充填されていてもよい。   For example, as shown in FIG. 2, the thrust slide bearing piece 7 may be formed with a grease reservoir groove 60 in which grease such as silicone grease is disposed. The thrust slide bearing piece 7 is in sliding contact with the annular lower surface 2 at the annular upper surface 26 and is in sliding contact with the annular upper surface 4 at the annular lower surface 27. Further, as shown in FIG. 7, for example, the thrust sliding bearing piece 7 is formed integrally with an annular upper surface 26 and has two or more annular protrusions 28 that are in sliding contact with the annular lower surface 2, and an annular lower surface. 27 and two or more annular protrusions 38 that are formed integrally with the annular upper surface 4 and that are in sliding contact with the annular upper surface 4. Between the thrust slide bearing piece 7 and the upper case 3 and / or the lower case 5, for example, as shown in FIG. 7, at least one of the thrust slide bearing piece 7 and the upper case 3 and / or the lower case 5. An annular sheet 59 that is slidably in contact with either of them may be interposed. The sheet 59 has a thickness of, for example, 0.05 mm to 1.0 mm, and is made of a synthetic resin including at least one of a polyamide resin, a polyester resin, a polyolefin resin, a polycarbonate resin, and a fluororesin. . The closing recess 63 closed by the sheet 59 and the annular protrusion 28 and / or the annular protrusion 38 may be filled with grease.

上ケース３、下ケース５及びスラスト滑り軸受片７は合成樹脂製であることが好ましく、スラスト滑り軸受片７を構成する合成樹脂は、特に自己潤滑性を有することが好ましく、上ケース３及び下ケース５を構成する合成樹脂は、耐摩耗性、耐衝撃性、耐クリープ性、剛性等の機械的特性に優れていることが好ましい。具体的には、スラスト滑り軸受片７を構成する合成樹脂としては、ポリアセタール樹脂、ポリアミド樹脂、ポリブチレンテレフタレート樹脂等のポリエステル樹脂、ポリエチレン樹脂、ポリプロピレン樹脂等のポリオレフィン樹脂、ポリカーボネート樹脂及びフッ素樹脂のうちの少なくとも一つを含む。上ケース３及び下ケース５を構成する合成樹脂としては、スラスト滑り軸受片７を構成する合成樹脂と同様の合成樹脂が使用され得るが、特にスラスト滑り軸受片７を構成する合成樹脂と摩擦特性の良好な組合わせであって、比較的剛性の高い合成樹脂であることが望ましい。その望ましい組合わせについて例示すると、スラスト滑り軸受片７と上ケース３及び下ケース５とに対して、ポリアセタール樹脂とポリアミド樹脂との組合わせ、ポリエチレン樹脂とポリアセタール樹脂との組合わせ、ポリブチレンテレフタレート樹脂とポリアセタール樹脂との組合わせ及びポリアセタール樹脂とポリアセタール樹脂との組合わせがあり、より好ましくは、ポリエチレン樹脂とポリアセタール樹脂との組合わせである。   The upper case 3, the lower case 5 and the thrust slide bearing piece 7 are preferably made of synthetic resin, and the synthetic resin constituting the thrust slide bearing piece 7 preferably has a self-lubricating property. The synthetic resin constituting the case 5 is preferably excellent in mechanical properties such as wear resistance, impact resistance, creep resistance, and rigidity. Specifically, the synthetic resin constituting the thrust slide bearing piece 7 includes polyacetal resin, polyamide resin, polyester resin such as polybutylene terephthalate resin, polyolefin resin such as polyethylene resin and polypropylene resin, polycarbonate resin and fluorine resin. Including at least one of As the synthetic resin constituting the upper case 3 and the lower case 5, the same synthetic resin as the synthetic resin constituting the thrust sliding bearing piece 7 can be used, and in particular, the synthetic resin constituting the thrust sliding bearing piece 7 and the friction characteristics. It is desirable that the synthetic resin be a combination with a relatively high rigidity. As an example of the desirable combination, for the thrust slide bearing piece 7 and the upper case 3 and the lower case 5, a combination of polyacetal resin and polyamide resin, a combination of polyethylene resin and polyacetal resin, polybutylene terephthalate resin And a combination of a polyacetal resin and a combination of a polyacetal resin and a polyacetal resin, more preferably a combination of a polyethylene resin and a polyacetal resin.

シール手段８は、環状空間６の外周側を密閉するように上ケース３と下ケース５との間に配されている外周シール部６１と、下ケース５の下面３３に当接するばね座５３に向かって下方に突出した環状の弾性突起部６２とを具備している。   The sealing means 8 includes an outer peripheral seal portion 61 disposed between the upper case 3 and the lower case 5 so as to seal the outer peripheral side of the annular space 6, and a spring seat 53 that contacts the lower surface 33 of the lower case 5. And an annular elastic protrusion 62 protruding downward.

外周シール部６１は、下側環状板部３１に嵌着若しくは固着されている断面Ｌ字状であって環状の芯金７１と、芯金７１に当該芯金７１を覆うように固着されている環状の弾性シール部材７５とを具備している。   The outer peripheral seal portion 61 has an L-shaped cross-section that is fitted or fixed to the lower annular plate portion 31 and is fixed to the core metal 71 and the core metal 71 so as to cover the core metal 71. And an annular elastic seal member 75.

芯金７１は、大径環状板部３６の外周面４３ａに装着される鉛直方向に伸びた長尺部７６と、環状段部４４に配されて下ケース５の外周面４３側の下面３３に装着される水平方向に伸びた短尺部７７とを具備している。芯金７１の外周面７２、外周面７２の上縁に連接する上縁面７３及び外周面７２の下縁に連接する下縁面７４は、弾性シール部材７５に覆われている。芯金７１は、下側環状板部３１に嵌着若しくは固着されている。   The metal core 71 is disposed on the outer circumferential surface 43a of the large-diameter annular plate portion 36 and extends in the vertical direction on the vertically extending portion 76, and on the lower surface 33 of the lower case 5 on the outer circumferential surface 43 side. And a short portion 77 extending in the horizontal direction to be mounted. The outer peripheral surface 72 of the metal core 71, the upper edge surface 73 connected to the upper edge of the outer peripheral surface 72, and the lower edge surface 74 connected to the lower edge of the outer peripheral surface 72 are covered with an elastic seal member 75. The cored bar 71 is fitted or fixed to the lower annular plate part 31.

弾性シール部材７５は、芯金７１を覆うように当該芯金７１に固着された環状本体８６と、環状本体８６の外周側に配されて当該環状本体８６の上端、本例では後述の部位５６に一体的に形成されていると共に環状空間６の外周側を密閉するように上側外筒部１４の内周面１５に滑接する可撓性を有した外側薄肉環状突縁部８７と、環状本体８６の内周側に配されて当該環状本体８６の下端、本例では後述の部位５７に一体的に形成されていると共に環状空間６の外周側を密閉するように下側環状板部３１の環状段部４４に滑接する可撓性を有した内側薄肉環状突縁部８８とを具備している。弾性シール部材７５は、ニトリルゴム、クロロプレンゴム、フッ素ゴム、ウレタンゴム、シリコーンゴム等の架橋ゴム、エステル系エラストマー、オレフィン系エラストマー、ウレタン系エラストマー、シリコーン系エラストマー等の熱可塑性エラストマーから選択された材料からなる。   The elastic seal member 75 is arranged on the outer peripheral side of the annular main body 86 so as to cover the core 71, and the upper end of the annular main body 86, in this example, a portion 56 described later. An outer thin annular projecting edge 87 having flexibility and slidingly contacting the inner peripheral surface 15 of the upper outer cylindrical portion 14 so as to seal the outer peripheral side of the annular space 6, and an annular main body The lower annular plate portion 31 is disposed on the inner peripheral side of the annular body 86 so as to be integrally formed with the lower end of the annular main body 86, which will be described later in a portion 57 in this example, and to seal the outer peripheral side of the annular space 6. And an inner thin annular projecting edge portion 88 having flexibility and slidingly contacting the annular step portion 44. The elastic seal member 75 is a material selected from a crosslinked elastomer such as nitrile rubber, chloroprene rubber, fluorine rubber, urethane rubber, and silicone rubber, and a thermoplastic elastomer such as ester elastomer, olefin elastomer, urethane elastomer, and silicone elastomer. Consists of.

環状本体８６は、芯金７１の外周面７２、上縁面７３及び下縁面７４を覆っている。芯金７１の外周面７２を覆っている環状本体８６の部位５５は環状であって断面略Ｌ字状であり、芯金７１の上縁面７３を覆っている環状本体８６の部位５６及び芯金７１の下縁面７４を覆っている環状本体８６の部位５７の夫々は環状である。環状本体８６の部位５５の下面５８は、本例では下面３３と面一である。   The annular body 86 covers the outer peripheral surface 72, the upper edge surface 73, and the lower edge surface 74 of the cored bar 71. A portion 55 of the annular main body 86 covering the outer peripheral surface 72 of the core metal 71 is annular and has a substantially L-shaped cross section, and a portion 56 of the annular main body 86 covering the upper edge surface 73 of the core metal 71 and the core. Each of the portions 57 of the annular body 86 covering the lower edge surface 74 of the gold 71 is annular. The lower surface 58 of the portion 55 of the annular main body 86 is flush with the lower surface 33 in this example.

外側薄肉環状突縁部８７は、上側外筒部１４に近接するに連れて次第に上側環状板部１１から離反するように傾斜している。このように傾斜している外側薄肉環状突縁部８７の最大径は、上側外筒部１４の内周面１５の径、本例では内周面１５の最大径よりも大きいか又は当該径と同径である。外側環状突縁部８７は、径方向において環状本体８６と上ケース３との間に介在される。外側薄肉環状突縁部８７は、下ケース５が上ケース３の上側外筒部１４内に押し込まれて当該上側外筒部１４内に配されると、内周面１５に滑接しながら撓められて、例えば図２に示すように専ら外側薄肉環状突縁部８７の上面８１において内周面１５に滑接することになる。斯かる外側薄肉環状突縁部８７によれば、前記内周面１５に滑接していることから、塵埃、雨水、泥水等の侵入を高いシール性をもって防止している。   The outer thin annular projecting edge portion 87 is inclined so as to gradually move away from the upper annular plate portion 11 as it approaches the upper outer cylinder portion 14. The maximum diameter of the outer thin annular projecting edge portion 87 that is inclined in this way is larger than the diameter of the inner peripheral surface 15 of the upper outer cylindrical portion 14, in this example, or the diameter of the inner peripheral surface 15. Same diameter. The outer annular protrusion 87 is interposed between the annular main body 86 and the upper case 3 in the radial direction. When the lower case 5 is pushed into the upper outer cylinder portion 14 of the upper case 3 and is disposed in the upper outer cylinder portion 14, the outer thin annular protrusion 87 is bent while sliding on the inner peripheral surface 15. Thus, for example, as shown in FIG. 2, the upper surface 81 of the outer thin annular projecting edge 87 exclusively contacts the inner peripheral surface 15. According to the outer thin annular projecting edge portion 87, since it is in sliding contact with the inner peripheral surface 15, entry of dust, rainwater, muddy water, and the like is prevented with high sealing performance.

内側薄肉環状突縁部８８は、小径環状板部３７の外周面４３ｂに近接するに連れて次第に上側環状板部１１から離反するように傾斜している。このように傾斜している内側薄肉環状突縁部８８の最小径は、外周面４３ｂの径よりも小さいか又は当該径と同径である。内側薄肉突縁部８８は、径方向において小径環状板部３７と環状本体８６との間に介在される。内側環状突縁部８８は、芯金７１が下側環状板部３１に嵌着若しくは固着される際に環状段部４４内に押し込まれて当該環状段部４４に配されると、外周面４３ｂに滑接しながら撓められて、例えば図２に示すように専ら内側薄肉環状突縁部８８の上面８２において滑接することになる。   The inner thin annular projecting edge 88 is inclined so as to gradually move away from the upper annular plate portion 11 as it approaches the outer peripheral surface 43 b of the small diameter annular plate portion 37. The minimum diameter of the inner thin annular protrusion 88 that is inclined in this way is smaller than or equal to the diameter of the outer peripheral surface 43b. The inner thin-walled protruding edge portion 88 is interposed between the small-diameter annular plate portion 37 and the annular main body 86 in the radial direction. The inner annular protrusion 88 is inserted into the annular step 44 when the core 71 is fitted or fixed to the lower annular plate 31 and is disposed on the annular step 44. For example, as shown in FIG. 2, it is slidably brought into contact with the upper surface 82 of the inner thin annular projecting edge 88.

弾性突起部６２は、環状本体８６の部位５５の下面５８に一体的に形成された小径の環状突起部９５と、環状本体８６の下面５８に一体的に形成されていると共に環状突起部９５よりも外側に配された大径の環状突起部９６とを具備している。環状突起部９５及び９６の夫々の突出端は、下側環状板部３１の下面３３よりも下方に位置している。弾性突起部６２は、弾性シール部材７５と同材料からなる。   The elastic protrusion 62 is formed integrally with the small-diameter annular protrusion 95 formed on the lower surface 58 of the portion 55 of the annular body 86, and is formed integrally with the lower surface 58 of the annular body 86, and from the annular protrusion 95. And a large-diameter annular protrusion 96 disposed on the outside. The protruding ends of the annular protrusions 95 and 96 are located below the lower surface 33 of the lower annular plate portion 31. The elastic protrusion 62 is made of the same material as the elastic seal member 75.

環状突起部９５及び９６は、本例では夫々互いに等しい突出量を有しており、例えば、下面３３及び５８よりも下方に向かって０．１ｍｍ程度突出する。環状突起部９５及び９６の夫々は、本例では断面円弧状であるが、例えば断面三角状、断面四角状、断面台形状であってもよい。斯かる環状突起部９５及び９６の夫々は、下面５８に一体的に形成されていることからばね座５３に当接する小径環状板部３７よりも外周側に配されるので、ばね座５３と下側環状板部３１との間であって特に環状突起部９５及び９６よりも下側環状板部３１の内周側に塵埃、雨水、泥水等が侵入すること、ひいては塵埃、雨水、泥水等が環状段部４４、大径環状板部３６及び外周シール部６１間を介して環状空間６に侵入することをも防止している。また、斯かる環状突起部９５及び９６の夫々によれば、ばね座５３と下ケース５との相対的な滑りを抑えて、上ケース３とスラスト滑り軸受片７間及び／又は下ケース５とスラスト滑り軸受７間の良好な滑りを長期にわたって維持できる。本例の滑り軸受１は、小径環状板部３７の外周面４３ｂに滑接した可撓性を有した内側薄肉環状突縁部８８をも具備しており、上述のような塵埃、雨水、泥水等の侵入を更に高いシール性をもって防止するようになっている。尚、環状突起部９５は、環状突起部９６よりも下方に突出していてもよく、また、環状突起部９６は、環状突起部９５よりも下方に突出していてもよい。   In this example, the annular protrusions 95 and 96 have the same amount of protrusion, and for example, protrude about 0.1 mm downward from the lower surfaces 33 and 58. Each of the annular protrusions 95 and 96 has a circular arc shape in this example, but may have a triangular cross section, a square cross section, or a trapezoidal cross section. Since each of the annular protrusions 95 and 96 is formed integrally with the lower surface 58, it is disposed on the outer peripheral side with respect to the small-diameter annular plate portion 37 that contacts the spring seat 53. Dust, rainwater, muddy water, etc. intrude into the inner circumferential side of the annular plate portion 31 between the side annular plate portions 31 and especially lower than the annular projections 95 and 96. As a result, dust, rainwater, muddy water, etc. It also prevents entry into the annular space 6 through the space between the annular step 44, the large-diameter annular plate 36 and the outer peripheral seal 61. Further, according to each of the annular protrusions 95 and 96, relative slip between the spring seat 53 and the lower case 5 is suppressed, and between the upper case 3 and the thrust slide bearing piece 7 and / or the lower case 5 and Good sliding between the thrust sliding bearings 7 can be maintained over a long period of time. The slide bearing 1 of this example also includes a flexible inner thin annular projecting edge portion 88 that is in sliding contact with the outer peripheral surface 43b of the small-diameter annular plate portion 37, and the dust, rainwater, and muddy water as described above. And the like are prevented with higher sealing performance. The annular protrusion 95 may protrude downward from the annular protrusion 96, and the annular protrusion 96 may protrude downward from the annular protrusion 95.

尚、シール手段８は、上述の構成に加えて、例えば図６に示すように、下側環状板部３１に一体的に形成されていると共に上側環状板部１１に向かって凹状の環状凹部６５及び上側環状板部１１に一体的に形成されていると共に下側環状板部３１に向かって凸状の環状凸部６６を有しており、径方向に関して外周シール部６１とスラスト滑り軸受片７との間に配されたラビリンス構造６７を具備していてもよい。   In addition to the above-described configuration, the sealing means 8 is formed integrally with the lower annular plate portion 31 and recessed toward the upper annular plate portion 11 as shown in FIG. And an annular convex portion 66 that is formed integrally with the upper annular plate portion 11 and is convex toward the lower annular plate portion 31, and has an outer peripheral seal portion 61 and a thrust sliding bearing piece 7 in the radial direction. And a labyrinth structure 67 disposed between the two.

シール手段９は、例えば図３に示すように、下側筒部３４の下端に一体的に形成されている上方に向かって凹状の環状凹部９７と、環状凹部９７に画される空間に配されていると共に上側内筒部２１の下端に一体的に形成されている下方に向かって凸状の環状凸部９８とを具備している。シール手段９は、斯かる環状凹部９７と環状凸部９８とからなるラビリンス構造９９を有しており、当該ラビリンス構造９９によって上ケース３と下ケース５との間において環状空間６の内周側を密閉するようになっている。尚、シール手段９は、本例ではラビリンス構造９９を有してなるが、これに代えて、例えば上側内筒部２１の下端と下側筒部３４の下端との間に介在された弾性シール手段（図示せず）を有していてもよい。   For example, as shown in FIG. 3, the sealing means 9 is disposed in an annular concave portion 97 that is integrally formed at the lower end of the lower cylindrical portion 34 and a space defined by the annular concave portion 97. And an annular convex portion 98 that protrudes downward and is integrally formed at the lower end of the upper inner cylinder portion 21. The sealing means 9 has a labyrinth structure 99 composed of such an annular recess 97 and an annular protrusion 98, and the inner side of the annular space 6 between the upper case 3 and the lower case 5 by the labyrinth structure 99. Is designed to be sealed. The sealing means 9 has a labyrinth structure 99 in this example, but instead of this, for example, an elastic seal interposed between the lower end of the upper inner cylinder portion 21 and the lower end of the lower cylinder portion 34. Means (not shown) may be included.

以上の滑り軸受１は、例えば、ストラット型サスペンションアセンブリにおけるコイルばねの上部の板金加工されてなるばね座５３と、油圧ダンパのピストンロッドが固着される車体側の取付部材との間に装着されて用いられる。この場合、滑り軸受１の中央孔９１にピストンロッドの上部が上ケース３及び下ケース５に対して軸心Ｏの回りでＲ方向に回転自在になるようにして挿通される。滑り軸受１を介して装着されたストラット型サスペンションアセンブリでは、ステアリング操作に際してコイルばねを介するばね座５３の軸心Ｏの回りでの相対的なＲ方向の回転は、上ケース３に対する下ケース５の同方向の相対的な回転で行われる。尚、ストラット型サスペンションは車輌走行中に塵埃、雨水、泥水等に晒される車輌の部分に配されるために、ストラット型サスペンションに組み込まれる滑り軸受１の使用環境は極めて過酷なものとなることから、滑り軸受１のシール性の向上を図ることは重要である。   The slide bearing 1 described above is mounted between, for example, a spring seat 53 formed by sheet metal processing on an upper portion of a coil spring in a strut suspension assembly and a mounting member on a vehicle body side to which a piston rod of a hydraulic damper is fixed. Used. In this case, the upper part of the piston rod is inserted into the center hole 91 of the slide bearing 1 so as to be rotatable in the R direction around the axis O with respect to the upper case 3 and the lower case 5. In the strut type suspension assembly mounted via the slide bearing 1, the rotation in the R direction around the axis O of the spring seat 53 via the coil spring during the steering operation causes the lower case 5 to rotate relative to the upper case 3. This is done by relative rotation in the same direction. In addition, since the strut type suspension is disposed in a part of the vehicle that is exposed to dust, rainwater, muddy water, etc. while the vehicle is running, the usage environment of the slide bearing 1 incorporated in the strut type suspension becomes extremely severe. It is important to improve the sealing performance of the sliding bearing 1.

本例の滑り軸受１によれば、環状下面２を有した上ケース３と、上ケース３に当該上ケース３の軸心Ｏの回りでＲ方向に回転自在となるように重ね合わされると共に上ケース３の環状下面２に対面した環状上面４を有した下ケース５と、環状下面２及び環状上面４間の環状空間６に配された環状のスラスト滑り軸受片７と、環状空間６の外周側に配されたシール手段８とを具備しており、シール手段８は、環状空間６の外周側を密閉するように上ケース３と下ケース５との間に配されている外周シール部６１と、外周シール部６１の下面５８に形成されていると共に下ケース５の下面３３に当接する相手部材としての板金加工されてなるばね座５３に向かって突出した環状の弾性突起部６２とを具備しているために、下ケース５に当接するばね座５３の製作精度が低い場合においても、当該弾性突起部６２をばね座５３に弾性的に当接させることで、下ケース５とばね座５３との間に不要な隙間、特に下ケース５と上ケース３との間に通じる隙間を生じさせずに当該下ケース５とばね座５３との間への塵埃、雨水、泥水等の侵入、ひいては、下ケース５と上ケース３との間への塵埃、雨水、泥水等の侵入をより高いシール性をもって防止することができる。   According to the slide bearing 1 of the present example, the upper case 3 having the annular lower surface 2 is overlaid on the upper case 3 so as to be rotatable around the axis O of the upper case 3 in the R direction. A lower case 5 having an annular upper surface 4 facing the annular lower surface 2 of the case 3, an annular thrust slide bearing piece 7 disposed in an annular space 6 between the annular lower surface 2 and the annular upper surface 4, and an outer periphery of the annular space 6 Sealing means 8 arranged on the side, and the sealing means 8 is an outer peripheral seal portion 61 arranged between the upper case 3 and the lower case 5 so as to seal the outer peripheral side of the annular space 6. And an annular elastic protrusion 62 that is formed on the lower surface 58 of the outer peripheral seal portion 61 and protrudes toward the spring seat 53 formed as a mating member that contacts the lower surface 33 of the lower case 5. If it comes into contact with the lower case 5 Even when the manufacturing accuracy of the seat 53 is low, an unnecessary gap between the lower case 5 and the spring seat 53, particularly the lower case 5, can be obtained by elastically contacting the elastic protrusion 62 with the spring seat 53. Intrusion of dust, rainwater, muddy water, etc. between the lower case 5 and the spring seat 53 without causing a gap to be communicated with the upper case 3, and consequently between the lower case 5 and the upper case 3. Intrusion of dust, rainwater, muddy water and the like can be prevented with higher sealing performance.

滑り軸受１によれば、上ケース３は、環状下面２を有した上側環状板部１１と、上側環状板部１１の外周面１２側の下面１３に一体的に形成された上側外筒部１４とを具備しており、下ケース５は、環状上面４を有した下側環状板部３１を具備しており、下側環状板部３１は、大径環状板部３６と、大径環状板部３６の下面３３ａに一体的に形成された小径環状板部３７とを具備しており、大径環状板部３６の下面３３ａ及び小径環状板部３７の外周面４３ｂは、互いに協働して下ケース５の外周面４３側の下面３３に環状段部４４を形成しており、外周シール部６１は、下側環状板部３１に嵌着若しくは固着されている断面Ｌ字状であって環状の芯金７１と、芯金７１に当該芯金７１を覆うように固着されている環状の弾性シール部材７５とを具備しており、弾性シール部材７５は、芯金７１を覆うように当該芯金７１に固着された環状本体８６と、環状本体８６の外周側に配されて当該環状本体８６の上端に一体的に形成されていると共に環状空間６の外周側を密閉するように上側外筒部１４の内周面１５に滑接する可撓性を有した外側薄肉環状突縁部８７と、環状本体８６の内周側に配されて当該環状本体８６の下端に一体的に形成されていると共に環状空間６の外周側を密閉するように環状段部４４に滑接する可撓性を有した内側薄肉環状突縁部８８とを具備しているために、弾性突起部６２により下ケース５とこの下ケース５の下面３３に当接するばね座５３との間への塵埃、雨水、泥水等の侵入を防止することができ、しかも、内側薄肉環状突縁部８８により下ケース５と上ケース３との間への塵埃、雨水、泥水等の侵入を防止することができ、而して、より高いシール性をもって塵埃、雨水、泥水等の侵入を防止することができる。   According to the sliding bearing 1, the upper case 3 includes an upper annular plate portion 11 having an annular lower surface 2 and an upper outer cylinder portion 14 formed integrally with a lower surface 13 on the outer peripheral surface 12 side of the upper annular plate portion 11. The lower case 5 includes a lower annular plate portion 31 having an annular upper surface 4, and the lower annular plate portion 31 includes a large-diameter annular plate portion 36 and a large-diameter annular plate. A small-diameter annular plate portion 37 formed integrally with the lower surface 33a of the portion 36, and the lower surface 33a of the large-diameter annular plate portion 36 and the outer peripheral surface 43b of the small-diameter annular plate portion 37 cooperate with each other. An annular step 44 is formed on the lower surface 33 on the outer peripheral surface 43 side of the lower case 5, and the outer peripheral seal portion 61 has an L-shaped cross section that is fitted or fixed to the lower annular plate portion 31. Core metal 71 and an annular elastic seal member 75 fixed to the core metal 71 so as to cover the core metal 71. The elastic seal member 75 includes an annular body 86 fixed to the core metal 71 so as to cover the core metal 71, and an elastic seal member 75 that is disposed on the outer peripheral side of the annular body 86 and integrated with the upper end of the annular body 86. An outer thin annular protrusion 87 having flexibility and slidingly contacting the inner peripheral surface 15 of the upper outer cylindrical portion 14 so as to seal the outer peripheral side of the annular space 6, and an annular main body 86. An inner thin annular protrusion that is arranged on the inner peripheral side and is integrally formed at the lower end of the annular main body 86 and has a flexibility to slide in contact with the annular step portion 44 so as to seal the outer peripheral side of the annular space 6. Since the edge portion 88 is provided, the elastic protrusion 62 prevents entry of dust, rainwater, muddy water, and the like between the lower case 5 and the spring seat 53 in contact with the lower surface 33 of the lower case 5. Moreover, the lower case can be formed by the inner thin annular protrusion 88. And dust into between the upper case 3, it is possible to prevent rain water, the invasion of muddy water or the like, and Thus, dust, rain water, the entry of muddy water or the like can be prevented with higher sealability.

滑り軸受１によれば、外側薄肉環状突縁部８７は、上側外筒部１４に近接するに連れて次第に上側環状板部１１から離反するように傾斜しており、外側薄肉環状突縁部８７の最大径は、上側外筒部１４の内周面１５の径よりも大きいか又は当該径と同径であるために、外側薄肉環状突縁部８７が上側外筒部１４から離反する虞をなくすことができて、高いシール性を発揮し得る。   According to the slide bearing 1, the outer thin annular projecting edge portion 87 is inclined so as to gradually move away from the upper annular plate portion 11 as it approaches the upper outer cylinder portion 14. Is larger than the diameter of the inner peripheral surface 15 of the upper outer cylinder part 14 or the same diameter as the diameter, the outer thin annular protrusion 87 may be separated from the upper outer cylinder part 14. It can be eliminated and high sealing performance can be exhibited.

滑り軸受１によれば、内側薄肉環状突縁部８８は、小径環状板部３７の外周面４３ｂに近接するに連れて次第に上側環状板部１１から離反するように傾斜しており、内側環状突縁部８８の最小径は、小径環状板部３７の外周面４３ｂの径よりも小さいか又は当該径と同径であるために、内側環状突縁部８８によっても高いシール性を発揮し得る。   According to the slide bearing 1, the inner thin annular projecting edge 88 is inclined so as to gradually move away from the upper annular plate portion 11 as it approaches the outer peripheral surface 43 b of the small-diameter annular plate portion 37. Since the minimum diameter of the edge portion 88 is smaller than or equal to the diameter of the outer peripheral surface 43b of the small-diameter annular plate portion 37, the inner annular protruding edge portion 88 can also exhibit high sealing performance.

１ 滑り軸受
２ 環状下面
３ 上ケース
４ 環状上面
５ 下ケース
６ 環状空間
７ スラスト滑り軸受片
８、９ シール手段 DESCRIPTION OF SYMBOLS 1 Sliding bearing 2 Annular lower surface 3 Upper case 4 Annular upper surface 5 Lower case 6 Annular space 7 Thrust sliding bearing piece 8, 9 Sealing means

Claims (5)

ストラット型サスペンションアセンブリにおけるコイルばねの上部の板金加工されてなるばね座と、当該ストラット型サスペンションアセンブリにおける油圧ダンパのピストンロッドが固着される車体側の取付部材との間に装着される滑り軸受であって、環状下面を有した上ケースと、この上ケースに当該上ケースの軸心の回りで回転自在となるように重ね合わされると共に上ケースの環状下面に対面した環状上面を有した下ケースと、環状下面及び環状上面間の環状空間に配された環状のスラスト滑り軸受片と、環状空間の外周側に配されたシール手段とを具備しており、シール手段は、環状空間の外周側を密閉するように上ケースと下ケースとの間に配されている外周シール部と、この外周シール部の下面に形成されていると共にばね座に向かって突出した環状の弾性突起部とを具備しており、上ケースは、環状下面を有した上側環状板部と、この上側環状板部の外周面側の下面に一体的に形成された上側外筒部とを具備しており、下ケースは、環状上面を有した下側環状板部を具備しており、この下側環状板部は、大径環状板部と、大径環状板部の下面に一体的に形成された小径環状板部とを具備しており、大径環状板部の下面及び小径環状板部の外周面は、互いに協働して下ケースの外周面側の下面に環状段部を形成しており、外周シール部は、下側環状板部に嵌着若しくは固着されている断面Ｌ字状であって環状の芯金と、芯金に当該芯金を覆うように固着されている環状の弾性シール部材とを具備しており、弾性シール部材は、芯金を覆うように当該芯金に固着された環状本体と、この環状本体の外周側に配されて当該環状本体の上端に一体的に形成されていると共に環状空間の外周側を密閉するように上側外筒部の内周面に滑接する可撓性を有した外側薄肉環状突縁部と、環状本体の内周側に配されて当該環状本体の下端に一体的に形成されていると共に環状空間の外周側を密閉するように環状段部に滑接する可撓性を有した内側薄肉環状突縁部とを具備しており、外側薄肉環状突縁部は、上側外筒部に近接するに連れて次第に上側環状板部から離反するように傾斜しており、外側薄肉環状突縁部の最大径は、上側外筒部の内周面の径よりも大きく、内側薄肉環状突縁部は、小径環状板部の外周面に近接するに連れて次第に上側環状板部から離反するように傾斜しており、内側薄肉環状突縁部の最小径は、小径環状板部の外周面の径よりも小さく、弾性突起部は、外周シール部の下面に一体的に形成された断面半円形の第一の環状突起部と、外周シール部の下面に一体的に形成されていると共に第一の環状突起部よりも外側に配された断面半円形の第二の環状突起部とを具備しており、第一の環状突起部及び第二の環状突起部は、ばね座に当接するようになっている滑り軸受。 A sliding bearing mounted between a spring seat formed by sheet metal processing on an upper part of a coil spring in a strut type suspension assembly and a mounting member on a vehicle body side to which a piston rod of a hydraulic damper in the strut type suspension assembly is fixed. Te, the upper case having an annular lower surface, and a lower case having an annular upper surface which faces the annular lower surface of the upper case together are superimposed so as to be rotatable in the axial around the upper case to the upper case And an annular thrust sliding bearing piece disposed in the annular space between the annular lower surface and the annular upper surface, and sealing means disposed on the outer circumferential side of the annular space, the sealing means is disposed on the outer circumferential side of the annular space. a seal portion which is arranged between the upper case and the lower case so as to seal, spring seat with which is formed on the lower surface of the seal portion Towards which comprises a resilient protrusion annular protruding, upper case, and the upper annular plate portion having the annular lower surface, the upper integrally formed on the lower surface of the outer peripheral surface of the upper annular plate portion And the lower case includes a lower annular plate portion having an annular upper surface. The lower annular plate portion includes a large-diameter annular plate portion and a large-diameter annular plate portion. A small-diameter annular plate portion integrally formed on the lower surface of the lower case, and the lower surface of the large-diameter annular plate portion and the outer peripheral surface of the small-diameter annular plate portion cooperate with each other to provide a lower surface on the outer peripheral surface side of the lower case An annular step portion is formed, and the outer peripheral seal portion has an L-shaped cross-section that is fitted or fixed to the lower annular plate portion, so that the annular core bar and the core metal cover the core metal. The elastic seal member is fixed to the core metal so as to cover the core metal. The main body and the annular main body are arranged on the outer peripheral side of the annular main body so as to be formed integrally with the upper end of the annular main body and can be in sliding contact with the inner peripheral surface of the upper outer cylinder portion so as to seal the outer peripheral side of the annular space. An outer thin annular projecting edge portion having flexibility and an annular step portion disposed on the inner peripheral side of the annular main body and integrally formed at the lower end of the annular main body and sealing the outer peripheral side of the annular space And an inner thin annular projecting edge portion having flexibility, so that the outer thin annular projecting edge portion gradually separates from the upper annular plate portion as it approaches the upper outer cylinder portion. The maximum diameter of the outer thin annular protruding edge is larger than the diameter of the inner peripheral surface of the upper outer cylinder portion, and the inner thin annular protruding edge portion approaches the outer peripheral surface of the small-diameter annular plate portion. The inner thin annular rim is small in diameter so that it is inclined away from the upper annular plate. The elastic projection portion is smaller than the diameter of the outer peripheral surface of the annular plate portion, and the elastic projection portion is integrally formed with the first annular projection portion having a semicircular cross section formed integrally with the lower surface of the outer peripheral seal portion and the lower surface of the outer peripheral seal portion. And a second annular projection having a semicircular cross section disposed outside the first annular projection, and the first annular projection and the second annular projection are A sliding bearing that comes into contact with the spring seat . 外周シール部及び弾性突起部は、架橋ゴム又は熱可塑性エラストマーからなる請求項１に記載の滑り軸受。The sliding bearing according to claim 1, wherein the outer peripheral seal portion and the elastic projection portion are made of a crosslinked rubber or a thermoplastic elastomer. 上ケース及び下ケースのうちの少なくともいずれか一方は合成樹脂製であり、上ケース及び下ケースのうちの少なくともいずれか一方を形成する合成樹脂は、ポリアセタール樹脂、ポリアミド樹脂、ポリエステル樹脂、ポリオレフィン樹脂、ポリカーボネート樹脂及びフッ素樹脂のうちの少なくとも一つを含む請求項１又は２に記載の滑り軸受。At least one of the upper case and the lower case is made of a synthetic resin, and the synthetic resin forming at least one of the upper case and the lower case is a polyacetal resin, a polyamide resin, a polyester resin, a polyolefin resin, The plain bearing according to claim 1 or 2, comprising at least one of a polycarbonate resin and a fluororesin. スラスト滑り軸受片は合成樹脂製であり、スラスト滑り軸受片を形成する合成樹脂は、ポリアセタール樹脂、ポリアミド樹脂、ポリエステル樹脂、ポリオレフィン樹脂、ポリカーボネート樹脂及びフッ素樹脂のうちの少なくとも一つを含む請求項１から３のいずれか一項に記載の滑り軸受。The thrust sliding bearing piece is made of synthetic resin, and the synthetic resin forming the thrust sliding bearing piece includes at least one of polyacetal resin, polyamide resin, polyester resin, polyolefin resin, polycarbonate resin, and fluororesin. 4. A plain bearing according to any one of items 1 to 3. 環状空間の内周側に配されたシール手段を更に具備している請求項１から４のいずれか一項に記載の滑り軸受。The slide bearing according to any one of claims 1 to 4, further comprising sealing means disposed on an inner peripheral side of the annular space.
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JP6260784B2 (en) * 2014-06-30 2018-01-17 オイレス工業株式会社 Thrust sliding bearing and spring pad integrated elastic seal member used therefor
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