JP4273699B2 - Synthetic plastic thrust plain bearing - Google Patents

Synthetic plastic thrust plain bearing Download PDF

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Publication number
JP4273699B2
JP4273699B2 JP2002070778A JP2002070778A JP4273699B2 JP 4273699 B2 JP4273699 B2 JP 4273699B2 JP 2002070778 A JP2002070778 A JP 2002070778A JP 2002070778 A JP2002070778 A JP 2002070778A JP 4273699 B2 JP4273699 B2 JP 4273699B2
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JP2003269458A (en
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忠 渡井
和幸 宮田
亮平 金子
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Oiles Corp
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Oiles Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30—Spring/Damper and/or actuator Units
    • B60G2202/31—Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
    • B60G2202/312—The spring being a wound spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/128—Damper mount on vehicle body or chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/418—Bearings, e.g. ball or roller bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/45—Stops limiting travel
    • B60G2204/4502—Stops limiting travel using resilient buffer

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  • Sliding-Contact Bearings (AREA)
  • Fluid-Damping Devices (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Sealing Of Bearings (AREA)
  • Vehicle Body Suspensions (AREA)

Description

【０００１】
【発明が属する技術分野】
本発明は、合成樹脂製スラスト滑り軸受、とく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）に組込まれて好適な合成樹脂製スラスト滑り軸受に関する。
【０００２】
【従来の技術】
一般にストラット型サスペンションは主として四輪自動車の前輪に用いられ、主軸と一体となった外筒の中に油圧式ショックアブソーバを内蔵したストラットアッセンブリにコイルバネを組合わせたものである。上記サスペンションには、ストラットの軸線に対してコイルバネの軸線を積極的にオフセットさせ、該ストラットに内蔵されたショックアブソーバのピストンロッドの摺動を円滑に行わせる構造と、ストラットの軸線に対してコイルバネの軸線を一致させて配置させる構造のもの、とがある。いずれの構造においても、ステアリング操作によりストラットアッセンブリがコイルバネとともに回転するさい、当該回転を円滑に許容するべく車体の取付部材とコイルバネの上部バネ座シートとの間に軸受が配されている。
【０００３】
このスラスト軸受には、ボール若しくはニードルを使用したころがり軸受又は合成樹脂製の滑り軸受が使用されている。しかしながら、ころがり軸受は、微小揺動及び振動荷重等によりボール若しくはニードルに疲労破壊を生ずる虞があり、円滑なステアリング操作を維持し難いという問題がある。スラスト滑り軸受は、ころがり軸受に比べて摩擦トルクが高く、ステアリング操作を重くするという問題がある。さらに、いずれの軸受においても、摺動面への塵埃等異物の侵入を防止するべく装着されたゴム弾性体からなるダストシールの摩擦力が高いことに起因するステアリング操作を重くするという問題、とくに合成樹脂製滑り軸受においてはステアリング操作を一層重くするという問題がある。
【０００４】
また、滑り軸受においては、スティックスリップ現象を生じ、往々にして当該スティックスリップ現象に起因する摩擦音を発生させるという問題がある。このスティックスリップ現象に起因する摩擦音の発生は、グリース等の潤滑油剤が摺動面に所望に介在する限りにおいては殆ど生じないのであるが、長期の使用による潤滑油剤の摺動面からの消失等で摩擦音が生じ始める場合もあり得る。
【０００５】
上記従来の軸受の問題点を解決するべく、本出願人は、実願昭６１−１９６８０４号（実公平２−６２６３号）でもって合成樹脂製スラスト軸受を提案した。これを図で説明するとつぎのとおりである。図１３において、合成樹脂製スラスト軸受１は、合成樹脂製の上部ケース１０と、合成樹脂製の下部ケース２０と、該上、下部ケース１０、２０間に配された合成樹脂製の軸受片３０とを具備しており、上部ケース１０は、中央部に円孔１１を有する円板状平面部１２と、該円板状平面部１２の外周縁に一体に形成された円筒係合垂下部１３と、該円筒係合垂下部１３の端部内周面に形成された係合フック部１４とを備えており、下部ケース２０は、挿通孔２１を規定する内周面を有する円筒部２２と、該円筒部２２の外周面に該円筒部２２の一部２３を突出させて一体に形成された環状幅広鍔部２４と、該環状幅広鍔部２４の外周縁に一体に形成された円筒係合突出部２５と、該円筒係合突出部２５の下端外周面に形成された係合部２６とを備えており、該上部ケース１０は、該係合フック部１４を該下部ケース２０の係合部２６に弾性装着させて、下部ケース２０に組合されている。
【０００６】
【発明が解決しようとする課題】
上述した実願昭６１−１９６８０４号において提案した合成樹脂製スラスト軸受は、上記従来の合成樹脂製滑り軸受の問題点、すなわち軸受摺動面への塵埃等異物の侵入防止を目的として、摺動面間に該摺動面を囲繞して装着されたゴム弾性体からなるダストシールに起因するステアリング操作力の増大という問題点を解決することができ、また摺動面への塵埃等異物の侵入を極力防止して安定した、かつ円滑なステアリング操作力を得ることができるものであった。
【０００７】
しかしながら、上記合成樹脂製スラスト軸受においても、上、下部ケース１０、２０と該上、下部ケース１０、２０間に配される軸受片３０とを形成する合成樹脂の組合せによっては、上、下部ケース１０、２０と軸受片３０との間にスティックスリップ現象を生じ、往々にしてスティックスリップ現象に起因する摩擦音を発生するという問題が見出された。
【０００８】
また、該上、下部ケース１０、２０間に通常充填されるグリース等の潤滑油剤が上、下部ケース１０、２０及び上、下部ケース１０、２０と軸受片３０との間の各隙間に所望に介在する限りにおいては、上記のような摩擦音は殆ど生じないのであるが、スラスト荷重による摺動面からのスクイズアウト（押出され）及び長期の使用による潤滑油剤の消失等により、潤滑油剤の所望の介在を確保できない場合も生じ得る。
【０００９】
本発明は前記諸点に鑑みてなされたものであって、その目的とするところは、長期の使用においても摺動面からの潤滑油剤の消失を抑え、低い摩擦トルクをもって摺動でき、摩擦音の発生がなく、しかも、ストラット型サスペンションに組込んでも円滑なステアリング操作を確保し得る合成樹脂製スラスト滑り軸受を提供することにある。
【００１０】
【課題を解決するための手段】
本発明の第一の態様の合成樹脂製スラスト滑り軸受は、合成樹脂製の上部ケースと、合成樹脂製の下部ケースと、該上、下部ケース間に配される合成樹脂製の軸受片とからなり、ここで、該上部ケースは該下部ケースに弾性装着させて下部ケースに組合されてなる合成樹脂製スラスト滑り軸受であって、該軸受片は、中央部に円孔を有する円板からなり、その上、下面に一端が該円孔に開口し、他端が外周面に開口する複数個の放射状溝を具備すると共に、該放射状溝によって分割されたその上、下面の夫々の分割面に平坦面部で囲まれた凹所を具備しており、該放射状溝及び凹所には潤滑油剤が充填されるようになっている。
【００１１】
第一の態様のスラスト滑り軸受によれば、軸受片は、その上、下面に一端が該円孔に開口し、他端が外周面に開口する複数個の放射状溝を具備すると共に該放射状溝によって分割された上、下面の夫々の分割面に平坦面部で囲まれた凹所を具備しているために、これら平坦面部が実摺動面となる結果、当該摺動面の単位接触面積当たりの荷重（面圧）が高められ、結果として摩擦係数を低くすることができるのでストラット型サスペンションに組込んでも円滑なステアリング操作を確保し得る。
【００１２】
また、上記構成に加えて、軸受片の上、下面に形成された複数個の放射状溝及び上、下面の夫々の分割面に形成された凹所にはグリース等の潤滑油剤が充填されることから、摺動面には常時潤滑油剤が介在されることになる結果、スティックスリップ現象の発生はなく、当該スティックスリップ現象に起因する摩擦音を発生させることはない。
【００１３】
本発明の第二の態様の合成樹脂製スラスト滑り軸受は、合成樹脂製の上部ケースと、合成樹脂製の下部ケースと、該上、下部ケース間に配される合成樹脂製の軸受片とからなり、ここで、該上部ケースは該下部ケースに弾性装着させて下部ケースに組合されてなる合成樹脂製スラスト滑り軸受であって、該軸受片は、中央部に円孔を有する円板からなり、その上、下面に該円孔を囲む環状溝と、一端が該環状溝に開口し、他端が外周面に開口する複数個の放射状溝とを具備していると共に、該放射状溝によって分割されたその上、下面の夫々の分割面に平坦面部で囲まれた凹所を具備しており、該放射状溝、環状溝及び凹所には潤滑油剤が充填されるようになっている。
【００１４】
第二の態様のスラスト滑り軸受によれば、軸受片は、その上、下面に円孔を囲む環状溝と、一端が該環状溝に開口し、他端が外周面に開口する複数個の放射状溝とを具備していると共に、該放射状溝によって分割された上、下面の夫々の分割面に平坦面部で囲まれた凹所を具備しているために、第一の態様のスラスト滑り軸受と同様に、これら平坦面部が実摺動面となる結果、当該摺動面の単位接触面積当たりの荷重（面圧）が高められ、結果として摩擦係数を低くすることができるのでストラット型サスペンションに組込んでも円滑なステアリング操作を確保し得、また、これら放射状溝、環状溝及び凹所にはグリース等の潤滑油剤が充填されるので、摺動面には常時潤滑油剤が介在されることになり、結果としてスティックスリップ現象の発生はなく、当該スティックスリップ現象に起因する摩擦音を発生させることはない。
【００１５】
第一及び第二の態様のスラスト滑り軸受において、上、下部ケースを形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、ポリカーボネート樹脂などが使用されて好適であり、また軸受片を形成する合成樹脂としては、ポリアミド樹脂、ポリオレフィン樹脂、ふっ素樹脂などが使用されて好適である。
【００１６】
第一又は第二の態様のスラスト滑り軸受における放射状溝は、本発明の第三の態様の合成樹脂製スラスト滑り軸受のように、軸受片の上、下面に円周方向に等間隔に配されているとよい。
【００１７】
本発明における凹所は、その第四の態様のスラスト滑り軸受のように、平坦面部の一方の内周縁と該一方の内周縁と相対向する平坦面部の他方の内周縁とから夫々中央部にかけて夫々漸次その深さが深くなるように凹曲面で規定されていても、第五の態様のスラスト滑り軸受のように、平坦面部の一方の内周縁と該一方の内周縁と相対向する平坦面部の他方の内周縁とから夫々中央部にかけて夫々漸次その深さが深くなるように錐面で規定されていてもよい。凹所の最深部の深さは０．０５ｍｍから０．１５ｍｍまで、好ましくは０．０５ｍｍから０．０９ｍｍまで、より好ましくは０．０９ｍｍを超えて０．１２ｍｍまでであり、更に好ましくは０．１２ｍｍを超えて０．１５ｍｍまでである。具体的には、直径が４４．２ｍｍの円孔を有し、外径が５９．３ｍｍ、厚さが２．３ｍｍの合成樹脂製の軸受片であって、幅が２．１ｍｍ、深さが０．４７ｍｍで円周方向に等間隔に１６個の放射状溝を有する軸受片においては、凹所の最深部の深さはおおよそ０．０９ｍｍであるとよい。
【００１８】
これらの凹所は、平坦面部の一方の内周縁と該一方の内周縁と相対向する平坦面部の他方の内周縁とから夫々中央部にかけて夫々漸次その深さが深くなっているので、当該凹所に充填されたグリース等の潤滑油剤はスラスト荷重下において、実摺動面となる平坦面部に供給されるため、摺動面には常時潤滑油剤が介在されることになり、スティックスリップ現象の発生はなく、当該スティックスリップ現象に起因する摩擦音を発生させることはない。
【００１９】
本発明の第六の態様の合成樹脂製スラスト滑り軸受は、第一から第五のいずれかの態様の合成樹脂製スラスト滑り軸受において、軸受片は、その上面の平坦面部が上部ケースに、その下面の平坦面部が下部ケースに夫々摺動自在に接触して、上、下部ケース間に配されている。
【００２０】
本発明の第七の態様の合成樹脂製スラスト滑り軸受では、第一から第六のいずれかの態様の合成樹脂製スラスト滑り軸受において、上部ケースは、中央部に円孔を有する円板状平面部と、該円板状平面部の外周縁に一体に形成された円筒係合垂下部と、該円筒係合垂下部の端部内周面に形成された係合フック部とを備えており、下部ケースは、中央部に前記上部ケースの円孔と同径の挿通孔を有する円板状平面部と、該挿通孔と同径の内径を有して下部ケースの該円板状平面部の上面に形成された円筒部と、該円筒部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の外周縁に一体に形成された円筒係合突出部と、該円筒係合突出部の下端外周面に形成された係合部とを備えており、該上部ケースは該係合フック部を係合部に弾性装着させて下部ケースに組合されてなる。
【００２１】
第七の態様の合成樹脂製スラスト滑り軸受によれば、上、下部ケースは、上部ケースの係合フック部を下部ケースの係合部に弾性装着させることによって互いに組合されるので、その組立て作業を極めて簡単に行うことができる。
【００２２】
本発明の第八の態様の合成樹脂製スラスト滑り軸受では、第七の態様の合成樹脂製スラスト滑り軸受において、円板の円孔は、該円筒部の外径よりも大きい径を有しており、円板は、該円筒係合突出部の内径よりも小さい外径を有していると共に、その上面を該上部ケースの円板状平面部の下面に、その下面を該下部ケースの円板状平面部の上面に夫々摺接させて該上、下部ケース間に配されている。
【００２３】
本発明の第九の態様の合成樹脂製スラスト滑り軸受では、第一から第六のいずれかの態様の合成樹脂製スラスト滑り軸受において、上部ケースは、中央部に円孔を有する円板状平面部と、該円板状平面部の円孔の周縁から径方向外方に所定の間隔を隔てて該円板状平面部の下面に一体に形成された円筒垂下部と、該円筒垂下部と協働して環状の溝を形成するように、該円筒垂下部と径方向に所定の間隔を隔てて該円板状平面部の外周縁に一体に形成された円筒係合垂下部と、該円筒係合垂下部の端部内周面に形成された係合フック部とを備えており、下部ケースは、中央部に前記上部ケースの円孔と同径の挿通孔を有する円板状平面部と、該挿通孔と同径の内径を有して下部ケースの該円板状平面部の上面に形成された円筒部と、該円筒部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の上面に一体に形成され、該円筒部と下部ケースの円板状平面部の上面と協働して環状凹部を形成する円筒突出部と、該円筒突出部と協働して環状の溝を形成するように、該円筒突出部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の外周縁に一体に形成された円筒係合突出部と、該円筒係合突出部の下端外周面に形成された係合部とを備えており、該上部ケースは、円筒垂下部の端部を円筒突出部の端部と径方向に重畳させ、係合フック部を係合部に弾性装着させて、下部ケースに組合されてなる。
【００２４】
第九の態様の合成樹脂製スラスト滑り軸受によれば、上部ケースは、円筒垂下部の端部を該下部ケースの円筒突出部の端部と径方向に重畳させ、係合フック部を該下部ケースの係合部に弾性装着させて、下部ケースに組合されているので、該円筒垂下部と円筒突出部との重畳部及び係合フック部と係合部との弾性装着部にラビリンス作用による密封部が形成される結果、上、下部ケース間に塵埃等異物の侵入は防止される。
【００２５】
本発明の第十の態様の合成樹脂製スラスト滑り軸受では、第九の態様の合成樹脂製スラスト滑り軸受において、円板の円孔は、該円筒部の外径よりも大きい径を有しており、円板は、該円筒突出部の内径よりも小さい外径を有していると共に、その上面を該上部ケースの円板状平面部の下面に、その下面を該下部ケースの円板状平面部の上面に夫々摺接させて該上、下部ケース間に配されてなる。
【００２６】
本発明の第十一の態様の合成樹脂製スラスト滑り軸受では、第一から第六のいずれかの態様の合成樹脂製スラスト滑り軸受において、上部ケースは、中央部に円孔を有する円板状平面部と、該円板状平面部の円孔と同径の内径をもって該円板状平面部の下面に一体に形成された第一円筒垂下部と、該第一円筒垂下部の外周面と径方向外方に所定の間隔を隔てて該円板状平面部の下面に一体に形成された第二円筒垂下部と、該第二円筒垂下部と協働して環状の溝を形成するように、該第二円筒垂下部と径方向外方に所定の間隔を隔てて該円板状平面部の外周縁に一体に形成された円筒係合垂下部と、該円筒係合垂下部の端部内周面に形成された係合フック部とを備えており、下部ケースは、中央部に前記上部ケースの円孔と同径の挿通孔を有する円板状平面部と、下部ケースの該円板状平面部の上面に該挿通孔から環状肩部を介して径方向外方に離れて一体に形成された第一円筒突出部と、該第一円筒突出部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の上面に一体に形成され、該第一円筒突出部と下部ケースの該円板状平面部の上面と協働して環状凹部を形成する第二円筒突出部と、該第二円筒突出部と下部ケースの該円板状平面部の上面と協働して環状の溝を形成するように、該第二円筒突出部の外周面と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の外周縁に一体に形成された円筒係合突出部と、該円筒係合突出部の下端外周面に形成された係合部とを備えており、該上部ケースは、第一円筒垂下部の端部を第一円筒突出部の端部と径方向に、第二円筒垂下部の端部を第二円筒突出部の端部と径方向に夫々重畳させ、係合フック部を係合部に弾性装着させて、下部ケースに組合されてなる。
【００２７】
第十一の態様の合成樹脂製スラスト滑り軸受によれば、上部ケースは、第一円筒垂下部の端部を該下部ケースの第一円筒突出部の端部と径方向に、第二円筒垂下部の端部を該下部ケースの第二円筒突出部の端部と径方向に夫々重畳させ、係合フック部を該下部ケースの係合部に弾性装着させて、下部ケースに組合されているので、第一円筒垂下部と第一円筒突出部との重畳部、第二円筒垂下部と第二円筒突出部との重畳部及び係合フック部と係合部との弾性装着部にラビリンス作用による密封部が形成される結果、上、下部ケース間に塵埃等異物の侵入は一層防止される。
【００２８】
本発明の第十二の態様の合成樹脂製スラスト滑り軸受では、第十一の態様の合成樹脂製スラスト滑り軸受において、円板の円孔は、該第一円筒突出部の外径よりも大きい径を有しており、円板は、該第二円筒突出部の内径よりも小さい外径を有すると共に、その上面を該上部ケースの円板状平面部の下面に、その下面を該下部ケースの円板状平面部の上面に夫々摺接させて該上、下部ケース間に配されてなる。
【００２９】
本発明の第十三の態様の合成樹脂製スラスト滑り軸受では、第一から第六のいずれかの態様の合成樹脂製スラスト滑り軸受において、上部ケースは、中央部に円孔を有する円板状平面部と、該円板状平面部の円孔と同径の内径をもって円板状平面部の下面に一体に形成された第一円筒垂下部と、該第一円筒垂下部と径方向外方に所定の間隔を隔てて該円板状平面部の下面に一体に形成され、該第一円筒垂下部の外周面と協働して環状の溝を形成する第二円筒垂下部と、該第二円筒垂下部と径方向外方に所定の間隔を隔てて該円板状平面部の下面に一体に形成され、該第二円筒垂下部と円板状平面部の下面と協働して環状凹部を形成する第三円筒垂下部と、該第三円筒垂下部と協働して環状の溝を形成するように、第三円筒垂下部と径方向外方に所定の間隔を隔てて該円板状平面部の外周縁に一体に形成された円筒係合垂下部と、該円筒係合垂下部の端部内周面に形成された係合フック部とを備えており、下部ケースは、中央部に前記上部ケースの円孔と同径の挿通孔を有する円板状平面部と、下部ケースの該円板状平面部の上面に該挿通孔から環状肩部を介して径方向外方に離れて一体に形成された第一円筒突出部と、該第一円筒突出部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の上面に一体に形成され、該第一円筒突出部と協働して環状の溝を形成する第二円筒突出部と、下部ケースの該円板状平面部の上面に第二円筒突出部と径方向外方に所定の間隔を隔てて一体に形成され、該第二円筒突出部と下部ケースの該円板状平面部の上面と協働して環状凹部を形成する第三円筒突出部と、該第三円筒突出部と協働して環状の溝を形成するように、該第三円筒突出部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の外周縁に一体に形成された円筒係合突出部と、該円筒係合突出部の下端外周面に形成された係合部とを備えており、該上部ケースは、第一円筒垂下部及び第二円筒垂下部の夫々の端部を第一円筒突出部及び第二円筒突出部の夫々の端部と、第三円筒垂下部の端部を第三円筒突出部の端部と夫々その径方向に重畳させ、係合フック部を係合部に弾性装着させて、下部ケースに組合されてなる。
【００３０】
第十三の態様の合成樹脂製スラスト滑り軸受によれば、上部ケースは、第一円筒垂下部及び第二円筒垂下部の夫々の端部を該下部ケースの第一円筒突出部及び第二円筒突出部の夫々の端部と、第三円筒垂下部の端部を該下部ケースの第三円筒突出部の端部と夫々その径方向に重畳させ、係合フック部を該下部ケースの係合部に弾性装着させて、下部ケースに組合されているので、第一円筒垂下部と第一円筒突出部との重畳部、第二円筒垂下部と第二円筒垂下部との重畳部、第三円筒垂下部と第三円筒突出部との重畳部及び係合フック部と係合部との弾性装着部にラビリンス作用による密封部が形成される結果、上、下部ケース間に塵埃等異物の侵入はより一層防止される。
【００３１】
本発明の第十四の態様の合成樹脂製スラスト滑り軸受では、第十三の態様の合成樹脂製スラスト滑り軸受において、円板の円孔は、該第二円筒突出部の外径よりも大きい径を有しており、円板は、該第三円筒突出部の内径よりも小さい外径を有すると共に、その上面を該上部ケースの円板状平面部の下面に、その下面を該下部ケースの円板状平面部の上面に夫々摺接させて該上、下部ケース間に配されてなる。
【００３２】
なお、第九から第十四の態様の合成樹脂製スラスト滑り軸受においても、上、下部ケースは、上部ケースの係合フック部を該下部ケースの係合部に弾性装着させることによって互いに組合されるので、その組立て作業を極めて簡単に行うことができる。
【００３３】
本発明の第十五の態様の合成樹脂製スラスト滑り軸受では、第七から第十四のいずれかの態様の合成樹脂製スラスト滑り軸受において、下部ケースは、その下面に該挿通孔と同径の内径を有して一体に形成された円筒部を備えている。
【００３４】
第十五の態様の合成樹脂製スラスト滑り軸受によれば、当該スラスト滑り軸受の取付部材への取付けにあたり、取付部材に形成された取付孔に円筒部において挿入することにより行うことができるので、その取付け作業が極めて簡単となる。
【００３５】
次に本発明及びその実施の形態を、図に示す好ましい例を参照して説明する。なお、本発明はこれらの例に何等限定されないのである。
【００３６】
【発明の実施の形態】
図１から図４において、本例の第一の実施の形態の合成樹脂製スラスト滑り軸受１は、合成樹脂製の上部ケース１００と、合成樹脂製の下部ケース２００と、該上、下部ケース１００、２００間に配される合成樹脂製の軸受片３００とを具備しており、上部ケース１００は、中央部に円孔１０１を有する円板状平面部１０２と該円板状平面部１０２の外周縁に一体に形成された円筒係合垂下部１０３と該円筒係合垂下部１０３の端部内周面に形成された係合フック部１０４とを備えており、下部ケース２００は、中央部に前記上部ケース１００の円孔１０１と同径の挿通孔２０１を有する円板状平面部２０２と該挿通孔２０１と同径の内径を有して該円板状平面部２０２の上面に一体に形成された円筒部２０３と該円筒部２０３と径方向外方に所定の間隔を隔てて該円板状平面部２０２の外周縁に一体に形成され、該円筒部２０３と円板状平面部２０２の上面と協働して環状凹部２０４を形成する円筒係合突出部２０５と該円筒係合突出部２０５の下端外周面に形成された係合部２０６とを備えており、軸受片３００は、下部ケース２００の円筒部２０３の外径よりも大きい径の円孔３０１を有し、該円筒係合突出部２０５の内径よりも小さい外径を有する円板からなり、該軸受片３００は、その内周面で規定される円孔３０１に該下部ケース２００の円筒部２０３を配して、その上面を該上部ケース１００の該円板状平面部１０２の下面に、その下面を該下部ケース２００の円板状平面部２０２の上面に夫々摺接させて該上、下部ケース１００、２００間に配されていると共に、該上部ケース１００は該係合フック部１０４を該下部ケース２００の係合部２０６に弾性装着させて下部ケース２００に組合されている。
【００３７】
該軸受片３００は、その上、下面３０２、３０３に一端が該円孔３０１に開口し、他端が外周面３０４に開口して円周方向に等間隔に配された複数個の放射状溝３０５を具備すると共に該放射状溝３０５によって分割された上、下面３０２、３０３の夫々の分割面３０６、３０７に、当該分割面３０６、３０７の夫々と面一の平坦面部３０８、３０９、３１０、３１１で囲まれた凹所３１２を具備している。
【００３８】
該凹所３１２は、図３及び図４に示すように、平坦面部３０８、３０９の一方の内周縁と該平坦面部３０８、３０９の一方の内周縁と相対向する平坦面部３１０、３１１の他方の内周縁とから夫々中央部にかけて夫々漸次その深さが深くなるように凹曲面で規定されている。
【００３９】
軸受片３００の上、下面３０２、３０３に形成された複数個の放射状溝３０５及び上、下面３０２、３０３の夫々の分割面３０６、３０７に形成されて凹曲面で規定された凹所３１２には潤滑油剤が充填されている。
【００４０】
上述した合成樹脂製スラスト滑り軸受１において、上、下部ケース１００、２００間に配された軸受片３００は、その上、下面３０２、３０３に一端が該円孔３０１に開口し、他端が外周面３０４に開口して円周方向に等間隔に配された複数個の放射状溝３０５を具備すると共に該放射状溝３０５によって分割された上、下面３０２、３０３の夫々の分割面３０６、３０７に平坦面部３０８、３０９、３１０、３１１で囲まれた凹曲面で規定された凹所３１２を具備しており、スラスト荷重下においてはこれら平坦面部３０８、３０９、３１０、３１１が実摺動面となるため、当該摺動面の単位接触面積当たりの荷重（面圧）が高められており、また、複数個の放射状溝３０５及び上、下面３０２、３０３の夫々の分割面３０６、３０７に形成されて凹曲面で規定された凹所３１２にはグリース等の潤滑油剤が充填されており、実摺動面となる平坦面部３０８、３０９、３１０、３１１には常時潤滑油剤が介在されていることから、摩擦係数を低くすることができるばかりでなくスティックスリップ現象の発生はなく、当該スティックスリップ現象に起因する摩擦音を発生させることはない。
【００４１】
また、上述した構成からなる合成樹脂製スラスト滑り軸受１においては、上、下部ケース１００、２００は、該上部ケース１００の係合フック部１０４を該下部ケース２００の係合部２０６に弾性装着させることによって互いに組合されるので、その組立て作業を極めて簡単に行うことができる。
【００４２】
図５及び図６は、軸受片３００の上、下面３０２、３０３の夫々の分割面３０６、３０７に形成された凹所３１２の他の態様を示すものである。凹所３１２は、平坦面部３０８、３０９の一方の内周縁と該平坦面部３０８、３０９の一方の内周縁と相対向する平坦面部３１０、３１１の他方の内周縁とから夫々中央部にかけて漸次その深さが深くなるように錐面で規定されている。この態様の錐面で規定されている凹所３１２には、グリース等の潤滑油剤が充填される。
【００４３】
軸受片３００の上、下面３０２、３０３の夫々の分割面３０６、３０７に形成されて錐面で規定されている凹所３１２においても、前記軸受片３００の上、下面３０２、３０３の夫々の分割面３０６、３０７に形成されて凹曲面で規定された凹所３１２と同様の作用効果が得られる。
【００４４】
図７は、軸受片３００の他の実施の形態を示すものである。該軸受片３００は、その上、下面３０２、３０３に円孔３０１を囲む環状溝３１３と、一端が該環状溝３１３に開口し、他端が外周面３０４に開口して円周方向に等間隔に配された複数個の放射状溝３０５とを具備すると共に該放射状溝３０５によって分割された上、下面３０２、３０３の夫々の分割面３０６、３０７に、当該分割面３０６、３０７の夫々と面一の平坦面部３０８、３０９、３１０、３１１で囲まれた凹所３１２を具備している。
【００４５】
この軸受片３００においても、上、下面３０２、３０３の夫々の分割面３０６、３０７に形成された凹所３１２は、平坦面部３０８、３０９の一方の内周縁と該平坦面部３０８、３０９の一方の内周縁と相対向する平坦面部３１０、３１１の他方の内周縁とから夫々中央部にかけて夫々漸次その深さが深くなるように凹曲面、または平坦面部３０８、３０９の一方の内周縁と該平坦面部３０８、３０９の一方の内周縁と相対向する平坦面部３１０、３１１の他方の内周縁とから夫々中央部にかけて漸次その深さが深くなるように錐面で規定されている。
【００４６】
そして、上、下面３０２、３０３に形成された環状溝３１３、放射状溝３０５及び分割面３０６、３０７の夫々に形成された凹所３１２には、グリース等の潤滑油剤が充填される。
【００４７】
軸受片３００の上、下面３０２、３０３に円孔３０１を囲んで環状溝３１３を形成することにより、前述した図２に示す軸受片３００に比べ、実摺動面となる平坦面部３０８、３０９、３１０、３１１及び環状溝３１３の径方向内側の環状平坦面部３１４での潤滑油剤の保持性が高まり、摩擦係数をより低くすることができるばかりでなくスティックスリップ現象の発生はなく、当該スティックスリップ現象に起因する摩擦音を発生させることはない。
【００４８】
図８は、本例の第二の実施の形態の合成樹脂製スラスト滑り軸受１を示すもので、この合成樹脂製スラスト滑り軸受１は、前記第一の実施の形態の合成樹脂製スラスト滑り軸受１の構成に加えて、下部ケース２００の円板状平面部２０２の下面に、該挿通孔２０１と同径の内径を有する円筒部２０７を一体に形成したものである。
【００４９】
この下部ケース２００の下面に円筒部２０７を具備した合成樹脂製スラスト滑り軸受１においては、図９に示すようなストラット型サスペンションアッセンブリにおけるコイルばね４１の上部ばね座シート４２と、油圧ダンパのピストンロッド４３が固着される取付部材４４との間に取付けるにあたり、その取付けが簡単となる。
【００５０】
この場合、合成樹脂製スラスト滑り軸受１の上部ケース１００の円孔１０１及び下部ケース２００の挿通孔２０１にピストンロッド４３の上部が上部ケース１００及び下部ケース２００に対して軸心Ｏの回りでＲ方向に回転自在となるようにして挿通される。
【００５１】
図９に示すように合成樹脂製スラスト滑り軸受１を介して装着されたストラット型サスペンションアッセンブリでは、ステアリング操作に際してはコイルばね４１を介する上部バネ座シート４２の軸心Ｏの回りでの相対的なＲ方向の回転は、上部ケース１００に対する下部ケース２００の同方向の相対的な回転で円滑に行われる。
【００５２】
そして、合成樹脂製スラスト滑り軸受１によれば、上、下部ケース１００、２００間に配された軸受片３００は、その上、下面３０２、３０３に一端が該円孔３０１に開口し、他端が外周面３０４に開口して円周方向に等間隔に配された複数個の放射状溝３０５を具備すると共に該放射状溝３０５によって分割された上、下面３０２、３０３の夫々の分割面３０６、３０７に平坦面部３０８、３０９、３１０、３１１で囲まれて凹曲面で規定された凹所３１２を具備しており、スラスト荷重下においてはこれら平坦面部３０８、３０９、３１０、３１１が実摺動面となるため、当該摺動面の単位接触面積当たりの荷重（面圧）が高められており、また、複数個の放射状溝３０５及び上、下面３０２、３０３の夫々の分割面３０６、３０７に形成されて凹曲面で規定された凹所３１２にはグリース等の潤滑油剤が充填されており、実摺動面となる平坦面部３０８、３０９、３１０、３１１には常時潤滑油剤が介在されていることから、摩擦係数を低くすることができるばかりでなくスティックスリップ現象の発生はなく、当該スティックスリップ現象に起因する摩擦音の発生をなくし得、ストラット型サスペンションアッセンブリに組込んでも円滑なステアリング操作を確保し得ることになる。
【００５３】
図１０は、本例の第三の実施の形態の合成樹脂製スラスト滑り軸受１を示すものであり、合成樹脂製スラスト滑り軸受１は、合成樹脂製の上部ケース１００と、合成樹脂製の下部ケース２００と、該上、下部ケース１００、２００間に配される合成樹脂製の軸受片３００とを具備しており、上部ケース１００は、中央部に円孔１０１を有する円板状平面部１０２と該円孔１０１の周縁から径方向外方に所定の間隔を隔てて円板状平面部１０２の下面に一体に形成された円筒垂下部１０５と該円筒垂下部１０５と協働して環状の溝１０６を形成するように、該円筒垂下部１０５と径方向外方に所定の間隔を隔てて該円板状平面部１０２の外周縁に一体に形成された円筒係合垂下部１０３と該円筒係合垂下部１０３の端部内周面に形成された係合フック部１０４とを備えており、下部ケース２００は、中央部に前記上部ケース１００の円孔１０１と同径の挿通孔２０１を有する円板状平面部２０２と該挿通孔２０１と同径の内径を有して該円板状平面部２０２の上面に一体に形成された円筒部２０３と該円筒部２０３と径方向外方に所定の間隔を隔てて該円板状平面部２０２の上面と協働して環状凹部２０４を形成する円筒突出部２０８と該円筒突出部２０８と協働して環状の溝２０９を形成するように、該円筒突出部２０８と径方向外方に所定の間隔を隔てて該円板状平面部２０２の外周縁に一体に形成された円筒係合突出部２０５と該円筒係合突出部２０５の下端外周面に形成された係合部２０６とを備えており、軸受片３００は、該円筒部２０３の外径よりも大きい径の円孔３０１を有し、該円筒突出部２０８の内径よりも小さい外径を有する円板からなり、その上、下面３０２、３０３に一端が該円孔３０１に開口し、他端が外周面３０４に開口して円周方向に等間隔に配された複数個の放射状溝３０５を具備すると共に該放射状溝３０５によって分割された分割面３０６、３０７に平坦面部３０８、３０９、３１０、３１１で囲まれた凹所３１２を具備しており、該軸受片３００は、その内周面で規定される円孔３０１に該円筒部２０３を配し、その上面３０２を該上部ケース１００の円板状平面部１０２の下面に、その下面３０３を該下部ケース２００の円板状平面部２０２の上面に夫々摺接させて該上、下部ケース１００、２００間に配されていると共に、該上部ケース１００は、円筒垂下部１０５の端部を該下部ケース２００の円筒突出部２０８の端部と径方向に重畳させ、係合フック部１０４を該下部ケース２００の係合部２０６に弾性装着させて、下部ケース２００に組合されている。
【００５４】
上述した第三の実施の形態の合成樹脂製スラスト滑り軸受１において、上部ケース１００は、円筒垂下部１０５の端部を下部ケース２００の円筒突出部２０８の端部と径方向に重畳させ、係合フック部１０４を該下部ケース２００の係合部２０６に弾性装着させて、下部ケース２００に組合されていることにより、該円筒垂下部１０５と円筒突出部２０８との重畳部及び係合フック部１０４と係合部２０６との弾性装着部にラビリンス作用による密封部が形成されるので、上、下部ケース１００、２００間に塵埃等異物の侵入は防止される。
【００５５】
第三の実施の形態の合成樹脂製スラスト滑り軸受１においても、前記第一の実施の形態の合成樹脂製スラスト滑り軸受と同様、軸受片３００は、その上、下面３０２、３０３に一端が該円孔３０１に開口し、他端が外周面３０４に開口して円周方向に等間隔に配された複数個の放射状溝３０５を具備すると共に該放射状溝３０５によって分割された上、下面３０２、３０３の夫々の分割面３０６、３０７に平坦面部３０８、３０９、３１０、３１１で囲まれて凹曲面で規定された凹所３１２を具備しており、スラスト荷重下においてはこれら平坦面部３０８、３０９、３１０、３１１が実摺動面となるため、当該摺動面の単位接触面積当たりの荷重（面圧）が高められており、また、複数個の放射状溝３０５及び上、下面３０２、３０３の夫々の分割面３０６、３０７に形成されて凹曲面で規定された凹所３１２にはグリース等の潤滑油剤が充填されており、実摺動面となる平坦面部３０８、３０９、３１０、３１１には常時潤滑油剤が介在されていることから、摩擦係数を低くすることができるばかりでなくスティックスリップ現象の発生はなく、当該スティックスリップ現象に起因する摩擦音を発生させることはない。
【００５６】
図１１は、本例の第四の実施の形態の合成樹脂製スラスト滑り軸受１を示すものであり、合成樹脂製スラスト滑り軸受１は、合成樹脂製の上部ケース１００と、合成樹脂製の下部ケース２００と、該上、下部ケース１００、２００間に配される合成樹脂製の軸受片３００とを具備しており、上部ケース１００は、中央部に円孔１０１を有する円板状平面部１０２と該円孔１０１と同径の内径をもって円板状平面部１０２の下面に一体に形成された第一円筒垂下部１０７と該第一円筒垂下部１０７の外周面と径方向外方に所定の間隔を隔てて該円板状平面部１０２の下面に一体に形成された第二円筒垂下部１０５と該第二円筒垂下部１０５と協働して環状の溝１０６を形成するように、該第二円筒垂下部１０５と径方向外方に所定の間隔を隔てて該円板状平面部１０２の外周縁に一体に形成された円筒係合垂下部１０３と該円筒係合垂下部１０３の端部内周面に形成された係合フック部１０４とを備えており、下部ケース２００は、中央部に前記上部ケース１００の円孔１０１と同径の挿通孔２０１を有する円板状平面部２０２と該挿通孔２０１から環状肩部２１０を介して径方向外方に離れて円板状平面部２０２の上面に一体に形成された第一円筒突出部２１１と該第一円筒突出部２１１と径方向外方に所定の間隔を隔てて円板状平面部２０２の上面に一体に形成されており、該第一円筒突出部２１１と円板状平面部２０２の上面と協働して環状凹部２０４を形成する該第二円筒突出部２１２と該第二円筒突出部２１２と円板状平面部２０２の上面と協働して環状の溝２０９を形成するように、該第二円筒突出部２１２の外周面と径方向外方に所定の間隔を隔てて該円板状平面部２０２の外周縁に一体に形成された円筒係合突出部２０５と該円筒係合突出部２０５の下端外周面に形成された係合部２０６とを備えており、軸受片３００は、下部ケース２００の第一円筒突出部２１１の外径よりも大きい径の円孔３０１を有し、第二円筒突出部２１２の内径よりも小さい外径を有する円板からなり、その上、下面３０２、３０３に一端が該円孔３０１に開口し、他端が外周面３０４に開口して円周方向に等間隔に配された複数個の放射状溝３０５を具備すると共に該放射状溝３０５によって分割された分割面３０６、３０７の夫々に平坦面部３０８、３０９、３１０、３１１に囲まれた凹所３１２を具備しており、該軸受片３００は、その内周面で規定される円孔３０１に該第一円筒突出部２１１を配し、その上面３０２を該上部ケース１００の円板状平面部１０２の下面に、その下面３０３を該下部ケース２００の円板状平面部２０２の上面に夫々摺接させて該上、下部ケース１００、２００間に配されていると共に、該上部ケース１００は、第一円筒垂下部１０７の端部を該下部ケース２００の第一円筒突出部２１１の端部と径方向に、第二円筒垂下部１０５の端部を該下部ケース２００の第二円筒突出部２１２の端部と径方向に夫々重畳させ、係合フック部１０４を該下部ケース２００の係合部２０６に弾性装着させて、下部ケース２００に組合されている。
【００５７】
上述した第四の実施の形態の合成樹脂製スラスト滑り軸受１において、上部ケース１００は、第一円筒垂下部１０７の端部を該下部ケース２００の第一円筒突出部２１１の端部と径方向に、第二円筒垂下部１０５の端部を該下部ケース２００の第二円筒突出部２１２の端部と径方向に夫々重畳させ、係合フック部１０４を該下部ケース２００の係合部２０６に弾性装着させて、下部ケース２００に組合されていることにより、該スラスト滑り軸受１の内周面側に第一円筒垂下部１０７と下部ケース２００の第一円筒突出部２１１との重畳部にラビリンス作用による密封部が、また該スラスト滑り軸受１の外周面側に第二円筒垂下部１０５と該下部ケース２００の第二円筒突出部２１２との重畳部及び係合フック部１０４と係合部２０６の弾性装着部にラビリンス作用による密封部が夫々形成されるので、上、下部ケース１００、２００間に塵埃等異物の侵入は防止される。
【００５８】
第四の実施の形態の合成樹脂製スラスト滑り軸受１においても、前記第一ないし第三の実施の形態の合成樹脂製スラスト滑り軸受と同様、軸受片３００は、その上、下面３０２、３０３に一端が該円孔３０１に開口し、他端が外周面３０４に開口して円周方向に等間隔に配された複数個の放射状溝３０５を具備すると共に該放射状溝３０５によって分割された上、下面３０２、３０３の夫々の分割面３０６、３０７に平坦面部３０８、３０９、３１０、３１１で囲まれて凹曲面で規定された凹所３１２を具備しており、スラスト荷重下においてはこれら平坦面部３０８、３０９、３１０、３１１が実摺動面となるため、当該摺動面の単位接触面積当たりの荷重（面圧）が高められており、また、複数個の放射状溝３０５及び上、下面３０２、３０３の夫々の分割面３０６、３０７に形成されて凹曲面で規定された凹所３１２にはグリース等の潤滑油剤が充填されており、実摺動面となる平坦面部３０８、３０９、３１０、３１１には常時潤滑油剤が介在されていることから、摩擦係数を低くすることができるばかりでなくスティックスリップ現象の発生はなく、当該スティックスリップ現象に起因する摩擦音を発生させることはない。
【００５９】
図１２は、本例の第五の実施の形態の合成樹脂製スラスト滑り軸受１を示すものであり、合成樹脂製スラスト滑り軸受１は、合成樹脂製の上部ケース１００と、合成樹脂製の下部ケース２００と、該上、下部ケース１００、２００間に配される合成樹脂製の軸受片３００とを具備しており、上部ケース１００は、中央部に円孔１０１を有する円板状平面部１０２と該円孔１０１と同径の内径をもって円板状平面部１０２の下面に一体に形成された第一円筒垂下部１０７と該第一円筒垂下部１０７と径方向外方に所定の間隔を隔てて該円板状平面部１０２の下面に一体に形成され、第一円筒垂下部１０７の外周面と協働して環状の溝１０８を形成する第二円筒垂下部１０９と該第二円筒垂下部１０９と径方向外方に所定の間隔を隔てて該円板状平面部１０２の下面に一体に形成され、該第二円筒垂下部１０９と円板状平面部１０２の下面と協働して幅広環状凹溝１１０を形成する第三円筒垂下部１０５と該第三円筒垂下部１０５と協働して環状の溝１０６を形成するように、該第三円筒垂下部１０５と径方向外方に所定の間隔を隔てて該円板状平面部１０２の外周縁に一体に形成された円筒係合垂下部１０３と該円筒係合垂下部１０３の端部内周面に形成された係合フック部１０４とを備えており、下部ケース２００は、中央部に前記上部ケース１００の円孔１０１と同径の挿通孔２０１を有する円板状平面部２０２と該挿通孔２０１から環状肩部２１０を介して径方向外方に離れて円板状平面部２０２の上面に一体に形成された第一円筒突出部２１１と該第一円筒突出部２１１と径方向外方に所定の間隔を隔てて該円板状平面部２０２の上面に一体に形成されており、該第一円筒突出部２１１と協働して環状の溝２１３を形成する第二円筒突出部２１４と該円板状平面部２０２の上面に第二円筒突出部２１４と径方向外方に所定の間隔を隔てて一体に形成され、該第二円筒突出部２１４と円板状平面部２０２の上面と協働して環状凹部２０４を形成する第三円筒突出部２１２と該第三円筒突出部２１２と協働して環状の溝２０９を形成するように、該第三円筒突出部２１２と径方向外方に所定の間隔を隔てて該円板状平面部２０２の外周縁に一体に形成された円筒係合突出部２０５と該円筒係合突出部２０５の下端外周面に形成された係合部２０６とを備えており、軸受片３００は、該下部ケース２００の第二円筒突出部２１４の外径よりも大きい径の円孔３０１を有し、該下部ケース２００の第三円筒突出部２１２の内径よりも小さい外径を有する円板からなり、その上、下面３０２、３０３に一端が該円孔３０１に開口し、他端が外周面３０４に開口して円周方向に等間隔に配された複数個の放射状溝３０５を具備すると共に該放射状溝３０５によって分割された分割面３０６、３０７の夫々に平坦面部３０８、３０９、３１０、３１１で囲まれた凹所３１２を具備しており、該軸受片３００は、内周面で規定される円孔３０１に該下部ケース２００の第一及び第二円筒突出部２１１、２１４を配して、その上面３０２を該上部ケース１００の円板状平面部１０２の下面に、その下面３０３を該下部ケース２００の円板状平面部２０２の上面に夫々摺接させて、該上、下部ケース１００、２００間に配されていると共に、該上部ケース１００は、第一及び第二円筒垂下部１０７、１０９の夫々の端部を該下部ケース２００の第一及び第二円筒突出部２１１、２１４の夫々の端部と、第三円筒垂下部１０５の端部を該下部ケース２００の第三円筒突出部２１２の端部と夫々その径方向に重畳させ、係合フック部１０４を該下部ケース２００の係合部２０６に弾性装着させて、下部ケース２００に組合されている。
【００６０】
上述した第五の実施の形態の合成樹脂製スラスト滑り軸受１では、上部ケース１００は、第一、第二及び第三円筒垂下部１０７、１０９、１０５の夫々の端部を下部ケース２００の第一、第二及び第三円筒突出部２１１、２１４、２１２の夫々の端部とその径方向に重畳させ、係合フック部１０４を該下部ケース２００の係合部２０６に弾性装着させて、下部ケース２００に組合されていることにより、該合成樹脂製スラスト滑り軸受１の内周面側に第一及び第二円筒垂下部１０７、１０９と下部ケース２００の第一及び第二円筒突出部２１１、２１４との重畳部にラビリンス作用による密封部が、また合成樹脂製スラスト滑り軸受１の外周面側に第三円筒垂下部１０５と下部ケース２００の第三円筒突出部２１２との重畳部及び係合フック部１０４と係合部２０６との弾性装着部にラビリンス作用による密封部が夫々形成されるので、上、下部ケース１００、２００間に塵埃等異物の侵入は防止される。
【００６１】
第五の実施の形態の合成樹脂製スラスト滑り軸受１においても、前記第一ないし第四の実施の形態の合成樹脂製スラスト滑り軸受と同様、軸受片３００は、その上、下面３０２、３０３に一端が該円孔３０１に開口し、他端が外周面３０４に開口して円周方向に等間隔に配された複数個の放射状溝３０５を具備すると共に該放射状溝３０５によって分割された上、下面３０２、３０３の夫々の分割面３０６、３０７に平坦面部３０８、３０９、３１０、３１１で囲まれて凹曲面で規定された凹所３１２を具備しており、スラスト荷重下においてはこれら平坦面部３０８、３０９、３１０、３１１が実摺動面となるため、当該摺動面の単位接触面積当たりの荷重（面圧）が高められており、また、複数個の放射状溝３０５及び上、下面３０２、３０３の夫々の分割面３０６、３０７に形成されて凹曲面で規定された凹所３１２にはグリース等の潤滑油剤が充填されており、実摺動面となる平坦面部３０８、３０９、３１０、３１１には常時潤滑油剤が介在されていることから、摩擦係数を低くすることができるばかりでなくスティックスリップ現象の発生はなく、当該スティックスリップ現象に起因する摩擦音を発生させることはない。
【００６２】
上述した第三、第四及び第五の実施の形態の合成樹脂製スラスト滑り軸受１の構成に加えて、第二の実施の形態の合成樹脂製スラスト滑り軸受１と同様に、下部ケース２００の円板状平面部２０２の下面に、該挿通孔２０１と同径の内径を有する円筒部２０７を一体に形成してもよい。
【００６３】
【発明の効果】
本発明によれば、上、下部ケース間に配される軸受片は、その上、下面に一端が該円孔に開口し、他端が外周面に開口した複数個の放射状溝を具備すると共に該放射状溝によって分割された上、下面の夫々の分割面に平坦面部で囲まれた凹所を具備しており、スラスト荷重下においてはこれら平坦面部が実摺動面となるため、当該摺動面の単位接触面積当たりの荷重（面圧）が高められており、また、複数個の放射状溝及び上、下面の夫々の分割面に形成された凹所にはグリース等の潤滑油剤が充填されており、実摺動面となる平坦面部には常時潤滑油剤が介在されていることから、摩擦係数を低くすることができるばかりでなくスティックスリップ現象の発生はなく、当該スティックスリップ現象に起因する摩擦音を発生させることはない。
【図面の簡単な説明】
【図１】本発明の好ましい第一の実施の形態の例の断面図である。
【図２】図１に示す合成樹脂製の軸受片の平面図である。
【図３】図２のＩＩＩ−ＩＩＩ線矢視断面図である。
【図４】図２のＩＶ−ＩＶ線矢視断面図である。
【図５】図１に示す合成樹脂製の軸受片における凹所の実施の形態の例を示す図２のＩＩＩ−ＩＩＩ線矢視と同様の断面図である。
【図６】図１に示す合成樹脂製の軸受片における凹所の実施の形態の例を示す図２のＩＶ−ＩＶ線矢視と同様の断面図である。
【図７】図１に示す合成樹脂製の軸受片の他の実施の形態の例の平面図である。
【図８】本発明の好ましい第二の実施の形態の例の断面図である。
【図９】図８に示す例をストラット型サスペンションに組込んだ例の説明図である。
【図１０】本発明の好ましい第三の実施の形態の例の断面図である。
【図１１】本発明の好ましい第四の実施の形態の例の断面図である。
【図１２】本発明の好ましい第五の実施の形態の例の断面図である。
【図１３】従来の合成樹脂製スラスト軸受の断面図である。
【符号の説明】
１ 合成樹脂製スラスト滑り軸受
１００ 合成樹脂製の上部ケース
１０２ 円板状平面部
１０３ 円筒係合垂下部
１０４ 係合フック部
２００ 合成樹脂製の下部ケース
２０２ 円板状平面部
２０５ 円筒係合突出部
２０６ 係合部
３００ 合成樹脂製の軸受片
３０１ 円孔
３０５ 放射状溝
３０８、３０９、３１０、３１１ 平坦面部
３１２ 凹所[0001]
[Technical field to which the invention belongs]
The present invention relates to a thrust slide bearing made of synthetic resin, and more particularly to a thrust slide bearing made of synthetic resin suitable for being incorporated in a strut type suspension (McPherson type) in a four-wheeled vehicle.
[0002]
[Prior art]
In general, a strut suspension is mainly used for a front wheel of a four-wheel vehicle, and is a combination of a coil spring and a strut assembly in which a hydraulic shock absorber is incorporated in an outer cylinder integrated with a main shaft. The suspension has a structure in which the axis of the coil spring is positively offset with respect to the axis of the strut to smoothly slide the piston rod of the shock absorber built in the strut, and the coil spring with respect to the axis of the strut There is a structure in which the axes are aligned with each other. In any structure, when the strut assembly is rotated together with the coil spring by the steering operation, a bearing is disposed between the mounting member of the vehicle body and the upper spring seat of the coil spring so as to allow the rotation smoothly.
[0003]
As this thrust bearing, a rolling bearing using a ball or a needle or a synthetic resin sliding bearing is used. However, the rolling bearing has a problem that it may be difficult to maintain a smooth steering operation because the ball or needle may be damaged due to a minute swing and vibration load. The thrust slide bearing has a problem that the friction torque is higher than that of the rolling bearing and the steering operation becomes heavy. Furthermore, in any bearing, there is a problem that the steering operation becomes heavy due to the high frictional force of the dust seal made of a rubber elastic body that is installed to prevent foreign matters such as dust from entering the sliding surface. The resin sliding bearing has a problem that the steering operation becomes heavier.
[0004]
In addition, the sliding bearing has a problem that a stick-slip phenomenon occurs and a frictional noise caused by the stick-slip phenomenon is often generated. The generation of frictional noise due to this stick-slip phenomenon hardly occurs as long as a lubricant such as grease is present on the sliding surface as desired. In some cases, friction noise may begin to occur.
[0005]
In order to solve the above-mentioned problems of the conventional bearing, the present applicant has proposed a synthetic resin thrust bearing according to Japanese Utility Model No. 61-196804 (Japanese Utility Model Publication No. 2-6263). This is illustrated as follows. In FIG. 13, a synthetic resin thrust bearing 1 includes a synthetic resin upper case 10, a synthetic resin lower case 20, and synthetic resin bearing pieces 30 disposed between the upper and lower cases 10 and 20. The upper case 10 includes a disk-shaped flat surface portion 12 having a circular hole 11 in the center portion, and a cylindrical engagement hanging portion 13 formed integrally with the outer peripheral edge of the disk-shaped flat surface portion 12. And an engagement hook portion 14 formed on the inner peripheral surface of the end portion of the cylindrical engagement hanging portion 13, and the lower case 20 includes a cylindrical portion 22 having an inner peripheral surface that defines the insertion hole 21, An annular wide flange portion 24 integrally formed by projecting a part 23 of the cylindrical portion 22 on the outer peripheral surface of the cylindrical portion 22, and a cylindrical engagement integrally formed on the outer peripheral edge of the annular wide flange portion 24 A projecting portion 25, and an engaging portion 26 formed on the outer peripheral surface of the lower end of the cylindrical engaging projecting portion 25; With which, upper case 10, the engaging hook portion 14 elastically by mounting the engaging portion 26 of the lower case 20 are combined into the lower case 20.
[0006]
[Problems to be solved by the invention]
The synthetic resin thrust bearing proposed in Japanese Patent Application No. 61-196804 is a problem with the above-mentioned conventional synthetic resin sliding bearing, that is, for the purpose of preventing foreign matters such as dust from entering the sliding surface of the bearing. It can solve the problem of increased steering operation force due to the dust seal made of a rubber elastic body that is mounted so as to surround the sliding surface between the surfaces, and prevents foreign matter such as dust from entering the sliding surface. It was possible to obtain a stable and smooth steering operation force by preventing as much as possible.
[0007]
However, even in the above synthetic resin thrust bearing, depending on the combination of the synthetic resin forming the upper and lower cases 10 and 20 and the bearing pieces 30 disposed between the upper and lower cases 10 and 20, the upper and lower cases It has been found that a stick-slip phenomenon occurs between the bearings 10 and 20 and the bearing piece 30 and that a frictional noise caused by the stick-slip phenomenon is often generated.
[0008]
Also, lubricating oil such as grease normally filled between the upper and lower cases 10 and 20 is desired in the upper, lower cases 10 and 20 and the gaps between the upper and lower cases 10 and 20 and the bearing piece 30 as desired. As long as it is interposed, the frictional noise as described above hardly occurs. However, the squeeze-out (extrusion) from the sliding surface due to the thrust load, the disappearance of the lubricant due to long-term use, etc. There may be cases where the intervention cannot be ensured.
[0009]
The present invention has been made in view of the above points, and its object is to suppress the disappearance of the lubricant from the sliding surface even during long-term use, and to slide with a low friction torque, and to generate frictional noise. Further, it is an object of the present invention to provide a synthetic resin thrust sliding bearing that can ensure a smooth steering operation even when incorporated in a strut type suspension.
[0010]
[Means for Solving the Problems]
The synthetic resin thrust sliding bearing of the first aspect of the present invention comprises a synthetic resin upper case, a synthetic resin lower case, and a synthetic resin bearing piece disposed between the upper and lower cases. Here, the upper case is a synthetic resin thrust sliding bearing that is elastically attached to the lower case and combined with the lower case, and the bearing piece is a disk having a circular hole in the center. In addition, a plurality of radial grooves having one end opened in the circular hole on the lower surface and the other end opened in the outer peripheral surface, and each divided surface of the upper surface and the lower surface divided by the radial groove are provided. A recess surrounded by a flat surface portion is provided, and the radial groove and the recess are filled with a lubricant.
[0011]
According to the thrust sliding bearing of the first aspect, the bearing piece further includes a plurality of radial grooves having one end opened in the circular hole on the lower surface and the other end opened in the outer peripheral surface, and the radial groove. Since each of the divided surfaces on the lower surface is provided with a recess surrounded by a flat surface portion, the flat surface portion becomes an actual sliding surface. As a result, the friction coefficient can be lowered, so that a smooth steering operation can be ensured even if it is incorporated in a strut suspension.
[0012]
In addition to the above configuration, a plurality of radial grooves formed on the upper and lower surfaces of the bearing piece and recesses formed on the respective divided surfaces of the upper and lower surfaces are filled with a lubricant such as grease. As a result, the lubricant is always present on the sliding surface. As a result, the stick-slip phenomenon does not occur, and the frictional noise caused by the stick-slip phenomenon does not occur.
[0013]
The synthetic resin thrust sliding bearing of the second aspect of the present invention comprises a synthetic resin upper case, a synthetic resin lower case, and a synthetic resin bearing piece disposed between the upper and lower cases. Here, the upper case is a synthetic resin thrust sliding bearing that is elastically attached to the lower case and combined with the lower case, and the bearing piece is a disk having a circular hole in the center. And an annular groove surrounding the circular hole on the lower surface, and a plurality of radial grooves having one end opened in the annular groove and the other end opened in the outer peripheral surface, and divided by the radial groove. In addition, each of the dividing surfaces of the lower surface is provided with a recess surrounded by a flat surface portion, and the radial groove, the annular groove and the recess are filled with a lubricant.
[0014]
According to the thrust sliding bearing of the second aspect, the bearing piece has an annular groove surrounding the circular hole on the lower surface thereof, and a plurality of radial grooves having one end opened in the annular groove and the other end opened in the outer peripheral surface. A thrust sliding bearing according to the first aspect, comprising a groove and a recess that is divided by the radial groove and that is surrounded by a flat surface portion on each divided surface of the lower surface. Similarly, as a result of these flat surface portions becoming actual sliding surfaces, the load (surface pressure) per unit contact area of the sliding surface is increased, and as a result, the coefficient of friction can be lowered, so that it is incorporated into the strut suspension. Smooth steering operation can be ensured even if it is inserted, and since the lubricant such as grease is filled in the radial groove, the annular groove and the recess, the lubricant is always present on the sliding surface. As a result, stick-slip phenomenon No occurrence, is not generated frictional noise attributable to the stick-slip phenomenon.
[0015]
In the thrust sliding bearings of the first and second aspects, as the synthetic resin forming the upper and lower cases, polyacetal resin, polyamide resin, polycarbonate resin and the like are preferably used, and the synthetic resin forming the bearing piece For example, a polyamide resin, a polyolefin resin, a fluorine resin, or the like is preferably used.
[0016]
The radial grooves in the thrust sliding bearing of the first or second aspect are arranged at equal intervals in the circumferential direction on the upper and lower surfaces of the bearing piece as in the synthetic resin thrust sliding bearing of the third aspect of the present invention. It is good to have.
[0017]
As in the thrust slide bearing of the fourth aspect, the recess in the present invention extends from one inner peripheral edge of the flat surface portion and the other inner peripheral edge of the flat surface portion opposite to the one inner peripheral edge to the central portion. Even if the concave surface is specified so that the depth gradually increases, one inner peripheral edge of the flat surface portion and the flat surface portion opposite to the one inner peripheral edge as in the thrust slide bearing of the fifth aspect. It may be defined by a conical surface so that the depth gradually increases from the other inner peripheral edge to the center of each. The depth of the deepest part of the recess is 0.05 mm to 0.15 mm, preferably 0.05 mm to 0.09 mm, more preferably more than 0.09 mm to 0.12 mm, and still more preferably 0.00. More than 12 mm and up to 0.15 mm. Specifically, it is a synthetic resin bearing piece having a circular hole with a diameter of 44.2 mm, an outer diameter of 59.3 mm, and a thickness of 2.3 mm, having a width of 2.1 mm and a depth of In a bearing piece having 0.4 radial grooves and 16 radial grooves at equal intervals in the circumferential direction, the depth of the deepest part of the recess may be approximately 0.09 mm.
[0018]
These recesses gradually increase in depth from one inner peripheral edge of the flat surface portion and the other inner peripheral edge of the flat surface portion opposite to the one inner peripheral edge to the central portion, respectively. Since the lubricating oil such as grease filled in the place is supplied to the flat surface portion that becomes the actual sliding surface under the thrust load, the lubricating oil is always present on the sliding surface, and the stick-slip phenomenon There is no occurrence, and no frictional noise due to the stick-slip phenomenon is generated.
[0019]
The synthetic resin thrust sliding bearing according to the sixth aspect of the present invention is the synthetic resin thrust sliding bearing according to any one of the first to fifth aspects. The flat surface portion of the lower surface is slidably in contact with the lower case, and is disposed between the upper and lower cases.
[0020]
In the synthetic resin thrust sliding bearing of the seventh aspect of the present invention, in the synthetic resin thrust sliding bearing of any one of the first to sixth aspects, the upper case has a disk-like plane having a circular hole in the central portion. A cylindrical engagement hanging portion formed integrally with the outer peripheral edge of the disk-shaped flat portion, and an engagement hook portion formed on the inner peripheral surface of the end portion of the cylindrical engagement hanging portion, The lower case has a disc-shaped flat portion having an insertion hole having the same diameter as the circular hole of the upper case in the central portion, and an inner diameter having the same diameter as the insertion hole. A cylindrical portion formed on the upper surface, a cylindrical engagement protrusion formed integrally with the outer peripheral edge of the disk-shaped flat portion of the lower case at a predetermined distance radially outward from the cylindrical portion, And an engaging portion formed on the outer peripheral surface of the lower end of the cylindrical engaging protrusion, and the upper case uses the engaging hook portion as an engaging portion. Made is combined to the lower case by sex mounted.
[0021]
According to the synthetic resin thrust sliding bearing of the seventh aspect, the upper and lower cases are combined with each other by elastically attaching the engaging hook portion of the upper case to the engaging portion of the lower case, so that the assembling work Can be done very easily.
[0022]
In the synthetic resin thrust sliding bearing of the eighth aspect of the present invention, in the synthetic resin thrust sliding bearing of the seventh aspect, the circular hole of the disk has a diameter larger than the outer diameter of the cylindrical portion. The disk has an outer diameter smaller than the inner diameter of the cylindrical engagement protrusion, and the upper surface thereof is a lower surface of the disk-shaped flat portion of the upper case, and the lower surface thereof is a circle of the lower case. The upper surface of the plate-like flat portion is slidably contacted with each other and is disposed between the upper and lower cases.
[0023]
In the synthetic resin thrust sliding bearing of the ninth aspect of the present invention, in the synthetic resin thrust sliding bearing of any one of the first to sixth aspects, the upper case is a disc-shaped flat surface having a circular hole in the center. A cylindrical hanging portion integrally formed on the lower surface of the disk-shaped planar portion with a predetermined distance radially outward from the peripheral edge of the circular hole of the disk-shaped planar portion, and the cylindrical hanging portion, A cylindrical engagement droop integrally formed on the outer peripheral edge of the disk-like flat portion at a predetermined distance in the radial direction from the cylindrical droop so as to cooperate to form an annular groove; An engagement hook portion formed on the inner peripheral surface of the end portion of the cylindrical engagement drooping portion, and the lower case has a disc-shaped flat portion having an insertion hole having the same diameter as the circular hole of the upper case at the center portion. A cylindrical portion having an inner diameter of the same diameter as the insertion hole and formed on the upper surface of the disk-shaped flat portion of the lower case, and the cylindrical portion, Formed integrally on the upper surface of the disk-shaped flat portion of the lower case at a predetermined interval outward in the direction, and forms an annular recess in cooperation with the upper surface of the cylindrical plate and the disk-shaped flat portion of the lower case And a cylindrical projection of the disk-shaped flat portion of the lower case at a predetermined distance radially outward from the cylindrical projection so as to form an annular groove in cooperation with the cylindrical projection. A cylindrical engagement protrusion formed integrally with the outer peripheral edge; and an engagement portion formed on the outer peripheral surface of the lower end of the cylindrical engagement protrusion. The upper case has an end portion of the cylindrical hanging portion. It overlaps with the end of the cylindrical protrusion in the radial direction, and the engagement hook portion is elastically attached to the engagement portion, and is combined with the lower case.
[0024]
According to the synthetic resin thrust sliding bearing of the ninth aspect, the upper case is configured such that the end portion of the cylindrical hanging portion overlaps the end portion of the cylindrical protruding portion of the lower case in the radial direction, and the engagement hook portion is the lower portion. Since it is elastically attached to the engaging part of the case and combined with the lower case, the overlapping part of the cylindrical hanging part and the cylindrical projecting part and the elastic attaching part of the engaging hook part and the engaging part are caused by labyrinth action. As a result of the formation of the sealing portion, entry of foreign matter such as dust between the upper and lower cases is prevented.
[0025]
In the synthetic resin thrust sliding bearing of the tenth aspect of the present invention, in the synthetic resin thrust sliding bearing of the ninth aspect, the circular hole of the disk has a diameter larger than the outer diameter of the cylindrical portion. The disk has an outer diameter smaller than the inner diameter of the cylindrical protrusion, and its upper surface is the lower surface of the disk-shaped flat portion of the upper case and its lower surface is the disk shape of the lower case. The upper surface of the flat portion is in sliding contact with the upper and lower cases.
[0026]
In the synthetic resin thrust sliding bearing of the eleventh aspect of the present invention, in the synthetic resin thrust sliding bearing of any one of the first to sixth aspects, the upper case has a disk shape having a circular hole in the central portion. A planar portion, a first cylindrical hanging portion integrally formed on the lower surface of the disk-shaped planar portion with the same inner diameter as the circular hole of the disk-shaped planar portion, and an outer peripheral surface of the first cylindrical hanging portion; A second cylindrical hanging part integrally formed on the lower surface of the disk-like flat part at a predetermined interval radially outward, and an annular groove formed in cooperation with the second cylindrical hanging part A cylindrical engagement hanging portion integrally formed on the outer peripheral edge of the disk-like flat portion at a predetermined distance radially outward from the second cylindrical hanging portion, and an end of the cylindrical engagement hanging portion The lower case has an insertion hole having the same diameter as the circular hole of the upper case at the center. A disk-shaped flat surface portion, a first cylindrical protrusion portion integrally formed on the upper surface of the disk-shaped flat surface portion of the lower case so as to be separated radially outward from the insertion hole via an annular shoulder portion, One cylindrical protrusion is formed integrally with the upper surface of the disk-shaped flat part of the lower case at a predetermined interval radially outward, and the first cylindrical protrusion and the disk-shaped flat part of the lower case A second cylindrical protrusion that forms an annular recess in cooperation with the upper surface, and an annular groove in cooperation with the upper surface of the second cylindrical protrusion and the disk-shaped flat portion of the lower case, A cylindrical engagement protrusion integrally formed on an outer peripheral edge of the disk-shaped flat portion of the lower case at a predetermined distance radially outward from the outer peripheral surface of the second cylindrical protrusion; And an engaging portion formed on the outer peripheral surface of the lower end of the projecting portion, and the upper case is configured such that the end of the first cylindrical hanging portion and the end of the first cylindrical projecting portion are radially The end of the second cylindrical suspended portion is respectively superimposed on the end portion in the radial direction of the second cylindrical protrusion, the engagement hook portion resiliently is fitted to the engagement portion, formed by being combined to the lower case.
[0027]
According to the synthetic resin thrust sliding bearing of the eleventh aspect, the upper case is configured such that the end of the first cylindrical hanging portion is in the radial direction with the end of the first cylindrical projecting portion of the lower case. The end portion of each portion is overlapped with the end portion of the second cylindrical protruding portion of the lower case in the radial direction, and the engaging hook portion is elastically attached to the engaging portion of the lower case to be combined with the lower case. Therefore, the labyrinth action is applied to the overlapping portion of the first cylindrical hanging portion and the first cylindrical protruding portion, the overlapping portion of the second cylindrical hanging portion and the second cylindrical protruding portion, and the elastic mounting portion of the engaging hook portion and the engaging portion. As a result of the formation of the sealed portion, the entry of foreign matter such as dust between the upper and lower cases is further prevented.
[0028]
In the synthetic resin thrust sliding bearing of the twelfth aspect of the present invention, in the synthetic resin thrust sliding bearing of the eleventh aspect, the circular hole of the disk is larger than the outer diameter of the first cylindrical protrusion. The disk has an outer diameter smaller than the inner diameter of the second cylindrical protruding portion, and its upper surface is the lower surface of the disk-shaped flat portion of the upper case, and its lower surface is the lower case The disc-shaped flat portion is slidably contacted with the upper surface of the disc-shaped flat portion, and is disposed between the upper and lower cases.
[0029]
In the synthetic resin thrust sliding bearing of the thirteenth aspect of the present invention, in the synthetic resin thrust sliding bearing of any one of the first to sixth aspects, the upper case has a disk shape having a circular hole in the central portion. A flat cylindrical portion, a first cylindrical hanging portion integrally formed on the lower surface of the disk-shaped flat portion having an inner diameter of the same diameter as the circular hole of the disk-shaped flat portion, and the first cylindrical hanging portion and a radially outward direction A second cylindrical hanging portion formed integrally with the lower surface of the disk-shaped flat portion at a predetermined interval and forming an annular groove in cooperation with the outer peripheral surface of the first cylindrical hanging portion, It is integrally formed on the lower surface of the disk-like flat part with a predetermined distance radially outward from the two cylindrical hanging parts, and is annularly formed in cooperation with the second cylindrical hanging part and the lower surface of the disk-like flat part A third cylindrical hanging part that forms a recess, and a third cylindrical hanging part and a radially outward direction so as to form an annular groove in cooperation with the third cylindrical hanging part A cylindrical engagement hanging portion integrally formed on the outer peripheral edge of the disk-shaped flat portion with a predetermined interval, and an engagement hook portion formed on the inner peripheral surface of the end portion of the cylindrical engagement hanging portion. The lower case has a disc-shaped flat portion having an insertion hole having the same diameter as the circular hole of the upper case at the center, and an annular shoulder portion from the insertion hole to the upper surface of the disc-shaped flat portion of the lower case. A first cylindrical projection formed integrally with the first cylindrical projection separated radially outward via the first cylindrical projection, and the disc-shaped flat portion of the lower case spaced apart from the first cylindrical projection by a predetermined radial distance. A second cylindrical projection formed integrally with the upper surface and forming an annular groove in cooperation with the first cylindrical projection; and a second cylindrical projection and a diameter on the upper surface of the disk-shaped flat portion of the lower case An annular recess is formed integrally with the second cylindrical protrusion and the upper surface of the disk-shaped flat portion of the lower case. A third cylindrical projecting portion and a third casing projecting portion, and the third cylindrical projecting portion and the third casing projecting portion are spaced radially apart from the third casing so as to form an annular groove. A cylindrical engagement protrusion formed integrally on the outer peripheral edge of the disk-shaped flat portion, and an engagement portion formed on the outer peripheral surface of the lower end of the cylindrical engagement protrusion. The ends of the first and second cylindrical hanging parts are the ends of the first and second cylindrical protruding parts, and the third cylindrical hanging part and the third cylindrical protruding part. The end hooks are overlapped with each other in the radial direction, and the engaging hooks are elastically attached to the engaging parts to be combined with the lower case.
[0030]
According to the synthetic resin thrust sliding bearing of the thirteenth aspect, the upper case has the first cylindrical projecting portion and the second cylindrical projecting portion at the ends of the first cylindrical hanging portion and the second cylindrical hanging portion, respectively. The end portions of the projecting portions and the end portions of the third cylindrical hanging portions are overlapped with the end portions of the third cylindrical projecting portions of the lower case in the radial direction, and the engaging hook portions are engaged with the lower case. Since it is elastically attached to the lower part and combined with the lower case, the overlapping part of the first cylindrical hanging part and the first cylindrical protruding part, the overlapping part of the second cylindrical hanging part and the second cylindrical hanging part, the third As a result of the formation of a sealing part by labyrinth action at the overlapping part of the cylindrical hanging part and the third cylindrical protruding part and the elastic mounting part of the engaging hook part and the engaging part, foreign matter such as dust enters between the upper and lower cases. Is further prevented.
[0031]
In the synthetic resin thrust sliding bearing of the fourteenth aspect of the present invention, in the synthetic resin thrust sliding bearing of the thirteenth aspect, the circular hole of the disk is larger than the outer diameter of the second cylindrical protrusion. The disc has an outer diameter smaller than the inner diameter of the third cylindrical protruding portion, and its upper surface is the lower surface of the disk-shaped flat portion of the upper case, and its lower surface is the lower case The disc-shaped flat portion is slidably contacted with the upper surface of the disc-shaped flat portion, and is disposed between the upper and lower cases.
[0032]
In the synthetic resin thrust plain bearings of the ninth to fourteenth aspects, the upper and lower cases are combined with each other by elastically attaching the engaging hook portion of the upper case to the engaging portion of the lower case. Therefore, the assembling work can be performed very easily.
[0033]
In the synthetic resin thrust sliding bearing of the fifteenth aspect of the present invention, in the synthetic resin thrust sliding bearing of any of the seventh to fourteenth aspects, the lower case has the same diameter as the insertion hole on the lower surface thereof. And a cylindrical portion formed integrally with each other.
[0034]
According to the thrust sliding bearing made of synthetic resin of the fifteenth aspect, the thrust sliding bearing can be attached to the mounting member by inserting it into the mounting hole formed in the mounting member in the cylindrical portion. The installation work is extremely simple.
[0035]
Next, the present invention and its embodiments will be described with reference to preferred examples shown in the drawings. The present invention is not limited to these examples.
[0036]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4, a synthetic resin thrust sliding bearing 1 according to the first embodiment of the present example includes a synthetic resin upper case 100, a synthetic resin lower case 200, and upper and lower cases 100. , 200 is provided with a synthetic resin bearing piece 300, and the upper case 100 includes a disc-shaped flat portion 102 having a circular hole 101 in the center and an outer portion of the disc-shaped flat portion 102. A cylindrical engagement hanging portion 103 integrally formed on the periphery, and an engagement hook portion 104 formed on an inner peripheral surface of the end portion of the cylindrical engagement hanging portion 103; A disk-shaped flat portion 202 having an insertion hole 201 having the same diameter as the circular hole 101 of the upper case 100 and an inner diameter having the same diameter as the insertion hole 201 are integrally formed on the upper surface of the disk-shaped flat portion 202. Cylindrical portion 203 and the cylindrical portion 203 radially outward A cylindrical engagement protrusion that is formed integrally with the outer peripheral edge of the disk-shaped flat surface portion 202 at a predetermined interval, and forms an annular recess 204 in cooperation with the cylindrical surface 203 and the upper surface of the disk-shaped flat surface portion 202. Part 205 and an engaging part 206 formed on the outer peripheral surface of the lower end of the cylindrical engaging projecting part 205, and the bearing piece 300 is a circular hole having a diameter larger than the outer diameter of the cylindrical part 203 of the lower case 200. The bearing piece 300 is formed in a circular hole 301 defined by the inner peripheral surface of the lower case 200 in the cylinder of the lower case 200. The portion 203 is disposed, and the upper surface thereof is slidably contacted with the lower surface of the disk-shaped flat portion 102 of the upper case 100 and the lower surface thereof is slidably contacted with the upper surface of the disk-shaped flat portion 202 of the lower case 200. And disposed between the lower cases 100 and 200, The upper case 100 is combined to the lower case 200 elastically by mounting the engagement hook portion 104 with the engagement portion 206 of the lower case 200.
[0037]
In addition, the bearing piece 300 has a plurality of radial grooves 305 arranged on the lower surfaces 302 and 303 with one end opening into the circular hole 301 and the other end opening into the outer peripheral surface 304 and equally spaced in the circumferential direction. And divided by the radial grooves 305, and on the divided surfaces 306 and 307 of the lower surfaces 302 and 303, the flat surfaces 308, 309, 310, and 311 that are flush with the divided surfaces 306 and 307, respectively. An enclosed recess 312 is provided.
[0038]
As shown in FIGS. 3 and 4, the recess 312 has one inner peripheral edge of the flat surface portions 308 and 309 and the other inner surface of the flat surface portions 310 and 311 facing each other. It is defined by a concave curved surface so that the depth gradually increases from the inner peripheral edge to the center.
[0039]
The plurality of radial grooves 305 formed on the upper and lower surfaces 302 and 303 of the bearing piece 300 and the recesses 312 formed on the respective split surfaces 306 and 307 of the upper and lower surfaces 302 and 303 and defined by the concave curved surface Filled with lubricant.
[0040]
In the above-described synthetic resin thrust sliding bearing 1, the bearing piece 300 disposed between the upper and lower cases 100 and 200 has upper and lower surfaces 302 and 303 having one end opened to the circular hole 301 and the other end being the outer periphery. A plurality of radial grooves 305 are formed in the surface 304 and are arranged at equal intervals in the circumferential direction, and are divided by the radial grooves 305 and flat on the respective divided surfaces 306 and 307 of the lower surfaces 302 and 303. Since the concave portion 312 defined by the concave curved surface surrounded by the surface portions 308, 309, 310, and 311 is provided, the flat surface portions 308, 309, 310, and 311 become actual sliding surfaces under a thrust load. The load per unit contact area (surface pressure) of the sliding surface is increased, and the radial grooves 305 and the divided surfaces 306 and 307 of the upper and lower surfaces 302 and 303 are formed. The recess 312 defined by the concave curved surface is filled with a lubricant such as grease, and the lubricant is always interposed in the flat surface portions 308, 309, 310 and 311 which are actual sliding surfaces. Therefore, not only the friction coefficient can be lowered, but also the stick-slip phenomenon does not occur, and the friction sound caused by the stick-slip phenomenon does not occur.
[0041]
Further, in the synthetic resin thrust sliding bearing 1 having the above-described configuration, the upper and lower cases 100 and 200 elastically attach the engaging hook portion 104 of the upper case 100 to the engaging portion 206 of the lower case 200. Therefore, the assembling work can be performed very easily.
[0042]
5 and 6 show another embodiment of the recess 312 formed in the dividing surfaces 306 and 307 of the upper and lower surfaces 302 and 303 of the bearing piece 300, respectively. The recess 312 gradually increases in depth from one inner peripheral edge of the flat surface portions 308 and 309 and the other inner peripheral edge of the flat surface portions 310 and 311 opposite to one inner peripheral edge of the flat surface portions 308 and 309 to the center portion. It is defined by a conical surface so that the depth becomes deep. The recess 312 defined by the conical surface of this aspect is filled with a lubricant such as grease.
[0043]
In the recesses 312 formed on the divided surfaces 306 and 307 of the upper and lower surfaces 302 and 303 of the bearing piece 300 and defined by the conical surfaces, the upper and lower surfaces 302 and 303 of the bearing piece 300 are divided. The same effect as that of the recess 312 formed on the surfaces 306 and 307 and defined by the concave curved surface can be obtained.
[0044]
FIG. 7 shows another embodiment of the bearing piece 300. The bearing piece 300 has an annular groove 313 surrounding the circular hole 301 on the lower surfaces 302 and 303, and one end opened in the annular groove 313 and the other end opened in the outer peripheral surface 304. And a plurality of radial grooves 305 disposed on the lower surface 302, 307 are divided by the radial grooves 305, and the divided surfaces 306, 307 are flush with the divided surfaces 306, 307. The recess 312 is surrounded by the flat surface portions 308, 309, 310, 311.
[0045]
Also in this bearing piece 300, the recesses 312 formed in the respective divided surfaces 306 and 307 of the upper and lower surfaces 302 and 303 have one inner peripheral edge of the flat surface portions 308 and 309 and one of the flat surface portions 308 and 309. A concave curved surface or one inner peripheral edge of the flat surface portions 308 and 309 and the flat surface portion so that the depth gradually increases from the other inner peripheral edge of the flat surface portions 310 and 311 opposite to the inner peripheral edge to the center portion, respectively. It is defined by a conical surface so that the depth gradually increases from the other inner peripheral edge of the flat surface portions 310 and 311 opposite to one inner peripheral edge of 308 and 309 to the center portion.
[0046]
The recesses 312 formed in the annular grooves 313, the radial grooves 305, and the dividing surfaces 306 and 307 formed in the upper and lower surfaces 302 and 303 are filled with a lubricant such as grease.
[0047]
By forming an annular groove 313 surrounding the circular hole 301 on the upper and lower surfaces 302, 303 of the bearing piece 300, flat surface portions 308, 309, which are actual sliding surfaces, compared to the bearing piece 300 shown in FIG. 310, 311 and the annular flat surface portion 314 on the radially inner side of the annular groove 313, the retention of the lubricant is increased, the friction coefficient can be lowered, and the stick-slip phenomenon does not occur. Friction noise caused by the noise is not generated.
[0048]
FIG. 8 shows a synthetic resin thrust sliding bearing 1 according to the second embodiment of the present example. This synthetic resin thrust sliding bearing 1 is the synthetic resin thrust sliding bearing according to the first embodiment. In addition to the configuration of 1, the cylindrical portion 207 having the same inner diameter as the insertion hole 201 is integrally formed on the lower surface of the disk-shaped flat portion 202 of the lower case 200.
[0049]
In the synthetic resin thrust sliding bearing 1 having the cylindrical portion 207 on the lower surface of the lower case 200, the upper spring seat 42 of the coil spring 41 and the piston rod of the hydraulic damper in the strut type suspension assembly as shown in FIG. When mounting between the mounting member 43 and the mounting member 44 to which the head 43 is fixed, the mounting becomes simple.
[0050]
In this case, the upper part of the piston rod 43 is placed around the axis O with respect to the upper case 100 and the lower case 200 in the circular hole 101 of the upper case 100 and the insertion hole 201 of the lower case 200 of the synthetic resin thrust sliding bearing 1. It is inserted so as to be rotatable in the direction.
[0051]
As shown in FIG. 9, in the strut type suspension assembly mounted via the synthetic resin thrust sliding bearing 1, a relative operation around the axis O of the upper spring seat 42 via the coil spring 41 is performed during the steering operation. The rotation in the R direction is smoothly performed by the relative rotation of the lower case 200 with respect to the upper case 100 in the same direction.
[0052]
According to the synthetic resin thrust sliding bearing 1, the bearing piece 300 disposed between the upper and lower cases 100 and 200 has upper and lower surfaces 302 and 303 having one end opened to the circular hole 301 and the other end. Has a plurality of radial grooves 305 that are open to the outer peripheral surface 304 and are arranged at equal intervals in the circumferential direction, and are divided by the radial grooves 305, and divided surfaces 306 and 307 of the lower surfaces 302 and 303, respectively. Are provided with a recess 312 surrounded by flat surface portions 308, 309, 310, 311 and defined by a concave curved surface. Under a thrust load, these flat surface portions 308, 309, 310, 311 are the actual sliding surfaces. Therefore, the load (surface pressure) per unit contact area of the sliding surface is increased, and the plurality of radial grooves 305 and the divided surfaces 306 and 307 of the upper and lower surfaces 302 and 303 are formed. The recess 312 defined by the concave curved surface is filled with a lubricant such as grease, and the lubricant is always interposed in the flat surface portions 308, 309, 310 and 311 which are actual sliding surfaces. Therefore, not only the friction coefficient can be lowered, but also the stick-slip phenomenon does not occur, the generation of the friction noise caused by the stick-slip phenomenon can be eliminated, and smooth steering operation can be ensured even if it is incorporated in a strut type suspension assembly. Will get.
[0053]
FIG. 10 shows a synthetic resin thrust sliding bearing 1 according to a third embodiment of the present example. The synthetic resin thrust sliding bearing 1 includes an upper case 100 made of a synthetic resin and a lower portion made of a synthetic resin. A case 200 and a synthetic resin bearing piece 300 disposed between the upper and lower cases 100 and 200 are provided. The upper case 100 has a disk-shaped flat portion 102 having a circular hole 101 at the center. And a cylindrical hanging part 105 integrally formed on the lower surface of the disk-like flat part 102 at a predetermined interval radially outward from the periphery of the circular hole 101, and an annular shape in cooperation with the cylindrical hanging part 105 The cylindrical engagement droop 103 and the cylinder integrally formed on the outer peripheral edge of the disk-like flat portion 102 at a predetermined distance radially outward from the cylindrical droop 105 so as to form the groove 106. Engagement formed on the inner peripheral surface of the end of the engagement hanging part 103 The lower case 200 has a disc-shaped flat portion 202 having an insertion hole 201 having the same diameter as the circular hole 101 of the upper case 100 at the center and the same diameter as the insertion hole 201. A cylindrical portion 203 having an inner diameter and integrally formed on the upper surface of the disk-shaped flat portion 202, and the upper surface of the disk-shaped flat portion 202 spaced apart from the cylindrical portion 203 in the radial direction. A cylindrical protrusion 208 that cooperates to form an annular recess 204 and a circular groove 209 that cooperates with the cylindrical protrusion 208 to form an annular groove 209 at a predetermined distance radially outward from the cylindrical protrusion 208. A cylindrical engagement protrusion 205 integrally formed on the outer peripheral edge of the disk-shaped flat portion 202, and an engagement portion 206 formed on the outer peripheral surface of the lower end of the cylindrical engagement protrusion 205; The bearing piece 300 has a circular hole 30 having a diameter larger than the outer diameter of the cylindrical portion 203. And has an outer diameter smaller than the inner diameter of the cylindrical projecting portion 208. Furthermore, one end of the lower surface 302, 303 opens into the circular hole 301 and the other end opens into the outer peripheral surface 304. And a plurality of radial grooves 305 arranged at equal intervals in the circumferential direction, and a recess surrounded by flat surface portions 308, 309, 310, 311 on split surfaces 306, 307 divided by the radial grooves 305 312, the bearing piece 300 has the cylindrical portion 203 disposed in a circular hole 301 defined by the inner peripheral surface thereof, and the upper surface 302 of the bearing piece 300 is the lower surface of the disk-shaped flat portion 102 of the upper case 100. Further, the lower surface 303 is placed in sliding contact with the upper surface of the disk-shaped flat portion 202 of the lower case 200, and is disposed between the upper and lower cases 100, 200. The end of 105 The engagement hook portion 104 is elastically attached to the engagement portion 206 of the lower case 200 so as to overlap the end portion of the cylindrical protrusion 208 of the lower case 200 in the radial direction, and is combined with the lower case 200.
[0054]
In the synthetic resin thrust sliding bearing 1 according to the third embodiment described above, the upper case 100 overlaps the end portion of the cylindrical hanging portion 105 with the end portion of the cylindrical protruding portion 208 of the lower case 200 in the radial direction. The combined hook portion 104 is elastically attached to the engaging portion 206 of the lower case 200 and combined with the lower case 200, whereby the overlapping portion of the cylindrical hanging portion 105 and the cylindrical protruding portion 208 and the engaging hook portion are combined. Since a sealing portion by a labyrinth action is formed at the elastic mounting portion between the 104 and the engaging portion 206, entry of foreign matter such as dust between the upper and lower cases 100 and 200 is prevented.
[0055]
Also in the synthetic resin thrust sliding bearing 1 of the third embodiment, the bearing piece 300 has one end on the lower surfaces 302 and 303 as well as the synthetic resin thrust sliding bearing of the first embodiment. A plurality of radial grooves 305 that open to the circular hole 301 and have the other end open to the outer peripheral surface 304 and are arranged at equal intervals in the circumferential direction, and are divided by the radial groove 305, an upper surface 302, Each of the divided surfaces 306 and 307 of 303 includes a recess 312 surrounded by flat surface portions 308, 309, 310, and 311 and defined by a concave curved surface. Under a thrust load, these flat surface portions 308, 309, Since 310 and 311 are actual sliding surfaces, the load (surface pressure) per unit contact area of the sliding surface is increased, and each of the plurality of radial grooves 305 and the upper and lower surfaces 302 and 303 is provided. The concave portions 312 formed on the divided surfaces 306 and 307 and defined by the concave curved surface are filled with a lubricant such as grease, and the flat surface portions 308, 309, 310, and 311 that are actual sliding surfaces are always provided. Since the lubricant is interposed, not only the friction coefficient can be lowered, but also the stick-slip phenomenon does not occur, and the frictional sound due to the stick-slip phenomenon does not occur.
[0056]
FIG. 11 shows a synthetic resin thrust sliding bearing 1 according to a fourth embodiment of the present example. The synthetic resin thrust sliding bearing 1 includes an upper case 100 made of a synthetic resin and a lower portion made of a synthetic resin. A case 200 and a synthetic resin bearing piece 300 disposed between the upper and lower cases 100 and 200 are provided. The upper case 100 has a disk-shaped flat portion 102 having a circular hole 101 at the center. A first cylindrical hanging portion 107 integrally formed on the lower surface of the disk-shaped flat portion 102 and having an inner diameter of the same diameter as the circular hole 101, and an outer peripheral surface of the first cylindrical hanging portion 107 and a predetermined radial outward. The second cylindrical hanging part 105 integrally formed on the lower surface of the disk-like flat part 102 with a space therebetween, and the second cylindrical hanging part 105 cooperate with the second cylindrical hanging part 105 to form the annular groove 106. A predetermined interval is spaced radially outward from the two cylindrical hanging parts 105. A cylindrical engagement hanging portion 103 integrally formed on the outer peripheral edge of the disc-shaped flat portion 102, and an engagement hook portion 104 formed on the inner peripheral surface of the end portion of the cylindrical engagement hanging portion 103; The lower case 200 has a disc-shaped flat portion 202 having an insertion hole 201 having the same diameter as the circular hole 101 of the upper case 100 in the center, and is separated radially outward from the insertion hole 201 via the annular shoulder 210. A first cylindrical protrusion 211 integrally formed on the upper surface of the disk-shaped flat surface portion 202, and a first space between the first cylindrical protrusion 211 and the upper surface of the disk-shaped flat surface portion 202 with a predetermined distance radially outward. The second cylindrical projecting portion 212 and the second cylindrical projecting portion 212 which are integrally formed and form an annular recess 204 in cooperation with the upper surface of the first cylindrical projecting portion 211 and the disc-shaped flat surface portion 202. An annular groove 209 is formed in cooperation with the upper surface of the disk-shaped flat portion 202. A cylindrical engagement protrusion 205 integrally formed on the outer peripheral edge of the disk-shaped flat portion 202 at a predetermined interval radially outward from the outer peripheral surface of the second cylindrical protrusion 212, and And an engagement portion 206 formed on the outer peripheral surface of the lower end of the cylindrical engagement protrusion 205, and the bearing piece 300 has a circular hole 301 having a diameter larger than the outer diameter of the first cylindrical protrusion 211 of the lower case 200. And has a disk having an outer diameter smaller than the inner diameter of the second cylindrical protruding portion 212. Furthermore, one end of the lower surface 302, 303 opens into the circular hole 301 and the other end opens into the outer peripheral surface 304. And a plurality of radial grooves 305 arranged at equal intervals in the circumferential direction, and divided surfaces 306 and 307 divided by the radial grooves 305 are surrounded by flat surface portions 308, 309, 310, and 311, respectively. The bearing piece 3 00, the first cylindrical protruding portion 211 is disposed in the circular hole 301 defined by the inner peripheral surface thereof, the upper surface 302 is disposed on the lower surface of the disk-shaped flat portion 102 of the upper case 100, and the lower surface 303 is disposed on the lower surface 303. The upper case 100 is slidably contacted with the upper surface of the disk-shaped flat portion 202 of the lower case 200 and is disposed between the upper and lower cases 100 and 200, and the upper case 100 has an end portion of the first cylindrical hanging portion 107. The end of the second cylindrical hanging portion 105 is overlapped with the end of the second cylindrical protrusion 212 of the lower case 200 in the radial direction with the end of the first cylindrical protrusion 211 of the lower case 200 in the radial direction. The engagement hook portion 104 is elastically attached to the engagement portion 206 of the lower case 200 and is combined with the lower case 200.
[0057]
In the synthetic resin thrust sliding bearing 1 according to the fourth embodiment described above, the upper case 100 is configured such that the end portion of the first cylindrical hanging portion 107 and the end portion of the first cylindrical protruding portion 211 of the lower case 200 are in the radial direction. The end portion of the second cylindrical hanging portion 105 is overlapped with the end portion of the second cylindrical protruding portion 212 of the lower case 200 in the radial direction, and the engaging hook portion 104 is engaged with the engaging portion 206 of the lower case 200. By being elastically mounted and being combined with the lower case 200, the labyrinth is formed on the overlapping portion of the first cylindrical hanging portion 107 and the first cylindrical protruding portion 211 of the lower case 200 on the inner peripheral surface side of the thrust slide bearing 1. The sealing portion by the action also overlaps the outer peripheral surface side of the thrust slide bearing 1 with the second cylindrical hanging portion 105 and the second cylindrical protruding portion 212 of the lower case 200, and the engaging hook portion 104 and the engaging portion 206. Elasticity of Since the sealing portion due to labyrinth action are respectively formed on the wear portion, upper, entry of foreign objects such as dust is prevented between the lower case 100 and 200.
[0058]
Also in the synthetic resin thrust sliding bearing 1 of the fourth embodiment, the bearing pieces 300 are formed on the lower surfaces 302 and 303 in the same manner as the synthetic resin thrust sliding bearings of the first to third embodiments. A plurality of radial grooves 305 having one end opened in the circular hole 301 and the other end opened in the outer peripheral surface 304 and arranged at equal intervals in the circumferential direction and divided by the radial groove 305, Respective divided surfaces 306 and 307 of the lower surfaces 302 and 303 are provided with recesses 312 defined by concave curved surfaces surrounded by flat surface portions 308, 309, 310, and 311. Under a thrust load, these flat surface portions 308 are provided. , 309, 310, and 311 are actual sliding surfaces, the load (surface pressure) per unit contact area of the sliding surface is increased, and a plurality of radial grooves 305 and upper and lower surfaces 302, A recess 312 formed on each of the three split surfaces 306 and 307 and defined by a concave curved surface is filled with a lubricating oil such as grease, and flat surface portions 308, 309, 310, and 311 serving as actual sliding surfaces. Since the lubricant is always present in the cylinder, not only can the friction coefficient be lowered, but also the stick-slip phenomenon does not occur, and no frictional noise due to the stick-slip phenomenon occurs.
[0059]
FIG. 12 shows a synthetic resin thrust sliding bearing 1 according to a fifth embodiment of the present example. The synthetic resin thrust sliding bearing 1 includes an upper case 100 made of a synthetic resin and a lower portion made of a synthetic resin. A case 200 and a synthetic resin bearing piece 300 disposed between the upper and lower cases 100 and 200 are provided. The upper case 100 has a disk-shaped flat portion 102 having a circular hole 101 at the center. And a first cylindrical hanging portion 107 integrally formed on the lower surface of the disk-like flat portion 102 with an inner diameter of the same diameter as the circular hole 101, and a predetermined interval radially outward from the first cylindrical hanging portion 107. A second cylindrical hanging portion 109 formed integrally with the lower surface of the disk-shaped flat portion 102 and forming an annular groove 108 in cooperation with the outer peripheral surface of the first cylindrical hanging portion 107, and the second cylindrical hanging portion 109 and the disc shape at a predetermined interval radially outward. A third cylindrical suspended portion 105 and the third cylinder which are integrally formed on the lower surface of the surface portion 102 and which form a wide annular concave groove 110 in cooperation with the lower surface of the second cylindrical suspended portion 109 and the disk-shaped planar portion 102. In an integrated manner with the outer peripheral edge of the disk-shaped flat portion 102 at a predetermined distance radially outward from the third cylindrical hanging portion 105 so as to form an annular groove 106 in cooperation with the hanging portion 105. A cylindrical engagement hanging portion 103 formed and an engagement hook portion 104 formed on the inner peripheral surface of the end portion of the cylindrical engagement hanging portion 103 are provided. The lower case 200 has a central portion of the upper case 100. A disk-shaped flat surface portion 202 having an insertion hole 201 having the same diameter as the circular hole 101 and an annular shoulder portion 210 away from the insertion hole 201 in the radial direction and integrally formed on the upper surface of the disk-shaped flat surface portion 202. First cylindrical protrusion 211 and the diameter of the first cylindrical protrusion 211 A second cylindrical protrusion which is integrally formed on the upper surface of the disk-shaped flat surface portion 202 with a predetermined interval outward and forms an annular groove 213 in cooperation with the first cylindrical protrusion 211. The second cylindrical protruding portion 214 and the disk-shaped flat portion 202 are integrally formed on the upper surface of the portion 214 and the disk-shaped flat portion 202 at a predetermined interval radially outward. A third cylindrical protrusion 212 that forms an annular recess 204 in cooperation with the upper surface of the second cylindrical protrusion 212, and a third cylindrical protrusion 212 that forms an annular groove 209 in cooperation with the third cylindrical protrusion 212. A cylindrical engagement projection 205 integrally formed on the outer peripheral edge of the disk-like flat portion 202 with a predetermined interval radially outward, and a engagement formed on the outer peripheral surface of the lower end of the cylindrical engagement projection 205 The bearing piece 300 is provided with a second cylindrical protrusion 2 of the lower case 200. 14 having a circular hole 301 having a diameter larger than the outer diameter of the lower case 200 and having a smaller outer diameter than the inner diameter of the third cylindrical protruding portion 212 of the lower case 200. Has a plurality of radial grooves 305 arranged at equal intervals in the circumferential direction with the other end opened to the outer peripheral surface 304 and the other end opened to the outer peripheral surface 304, and a divided surface 306 divided by the radial grooves 305. 307 are provided with recesses 312 surrounded by flat surface portions 308, 309, 310, and 311. The bearing piece 300 is inserted into the circular hole 301 defined by the inner peripheral surface of the lower case 200. The first and second cylindrical projecting portions 211 and 214 are arranged, the upper surface 302 of the upper case 100 is the lower surface of the disk-shaped flat portion 102, and the lower surface 303 of the lower case 200 is the disk-shaped flat portion 202. Slid on the top surface The upper case 100 is disposed between the upper and lower cases 100 and 200, and the upper case 100 is connected to the first and second cylinders of the lower case 200 at the ends of the first and second cylindrical hanging parts 107 and 109. The end portions of the projecting portions 211 and 214 and the end portion of the third cylindrical hanging portion 105 are overlapped in the radial direction with the end portion of the third cylindrical projecting portion 212 of the lower case 200, respectively. Is elastically attached to the engaging portion 206 of the lower case 200 and combined with the lower case 200.
[0060]
In the above-described synthetic resin thrust sliding bearing 1 according to the fifth embodiment, the upper case 100 has the ends of the first, second, and third cylindrical suspended portions 107, 109, 105 as the second case of the lower case 200. The end portions of the first, second and third cylindrical projecting portions 211, 214, 212 are overlapped in the radial direction, and the engaging hook portion 104 is elastically attached to the engaging portion 206 of the lower case 200, and the lower portion By being combined with the case 200, the first and second cylindrical hanging portions 107 and 109 and the first and second cylindrical protruding portions 211 of the lower case 200 are formed on the inner peripheral surface side of the synthetic resin thrust sliding bearing 1. A sealing portion by a labyrinth action is formed at the overlapping portion with 214, and an overlapping portion and engagement between the third cylindrical hanging portion 105 and the third cylindrical protruding portion 212 of the lower case 200 on the outer peripheral surface side of the synthetic resin thrust slide bearing 1. hook Since the sealing portion by the labyrinth effect on the elastic mounting unit of 104 and the engaging portion 206 are respectively formed, on, entry of foreign objects such as dust is prevented between the lower case 100 and 200.
[0061]
Also in the synthetic resin thrust sliding bearing 1 of the fifth embodiment, the bearing pieces 300 are formed on the lower surfaces 302 and 303 in the same manner as the synthetic resin thrust sliding bearings of the first to fourth embodiments. A plurality of radial grooves 305 having one end opened in the circular hole 301 and the other end opened in the outer peripheral surface 304 and arranged at equal intervals in the circumferential direction and divided by the radial groove 305, Respective divided surfaces 306 and 307 of the lower surfaces 302 and 303 are provided with recesses 312 defined by concave curved surfaces surrounded by flat surface portions 308, 309, 310, and 311. Under a thrust load, these flat surface portions 308 are provided. , 309, 310, and 311 are actual sliding surfaces, the load (surface pressure) per unit contact area of the sliding surface is increased, and a plurality of radial grooves 305 and upper and lower surfaces 302, A recess 312 formed on each of the three split surfaces 306 and 307 and defined by a concave curved surface is filled with a lubricating oil such as grease, and flat surface portions 308, 309, 310, and 311 serving as actual sliding surfaces. Since the lubricant is always present in the cylinder, not only can the friction coefficient be lowered, but also the stick-slip phenomenon does not occur, and no frictional noise due to the stick-slip phenomenon occurs.
[0062]
In addition to the structure of the synthetic resin thrust sliding bearing 1 of the third, fourth and fifth embodiments described above, the lower case 200 is similar to the synthetic resin thrust sliding bearing 1 of the second embodiment. A cylindrical portion 207 having the same inner diameter as that of the insertion hole 201 may be integrally formed on the lower surface of the disk-shaped flat portion 202.
[0063]
【The invention's effect】
According to the present invention, the bearing piece disposed between the upper and lower cases has a plurality of radial grooves with one end opened in the circular hole and the other end opened in the outer peripheral surface. The upper and lower surfaces are divided by the radial grooves, and each of the divided surfaces is provided with a recess surrounded by a flat surface portion. Under the thrust load, the flat surface portion becomes an actual sliding surface. The load (surface pressure) per unit contact area of the surface is increased, and a plurality of radial grooves and recesses formed in the upper and lower divided surfaces are filled with a lubricant such as grease. Since the lubricant is always present in the flat surface portion that is the actual sliding surface, not only can the friction coefficient be lowered, but also the stick-slip phenomenon does not occur, which is caused by the stick-slip phenomenon. Does not generate frictional sound
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an example of a preferred first embodiment of the present invention.
FIG. 2 is a plan view of the synthetic resin bearing piece shown in FIG.
3 is a cross-sectional view taken along the line III-III in FIG. 2;
4 is a cross-sectional view taken along the line IV-IV in FIG. 2;
5 is a cross-sectional view similar to that taken along the line III-III in FIG. 2, showing an example of a recess embodiment in the synthetic resin bearing piece shown in FIG. 1;
6 is a cross-sectional view similar to that taken along the line IV-IV in FIG. 2, showing an example of a recess embodiment in the synthetic resin bearing piece shown in FIG.
7 is a plan view of an example of another embodiment of the synthetic resin bearing piece shown in FIG. 1. FIG.
FIG. 8 is a cross-sectional view of an example of a preferred second embodiment of the present invention.
FIG. 9 is an explanatory diagram of an example in which the example shown in FIG. 8 is incorporated in a strut type suspension.
FIG. 10 is a cross-sectional view of an example of a preferred third embodiment of the present invention.
FIG. 11 is a cross-sectional view of a preferred fourth embodiment of the present invention.
FIG. 12 is a cross-sectional view of an example of a preferred fifth embodiment of the present invention.
FIG. 13 is a sectional view of a conventional synthetic resin thrust bearing.
[Explanation of symbols]
1 Thrust sliding bearing made of synthetic resin
100 Upper case made of synthetic resin
102 disk-shaped flat part
103 Cylindrical engagement hanging part
104 engagement hook
200 Lower case made of synthetic resin
202 disk-shaped flat part
205 Cylindrical engagement protrusion
206 engaging part
300 Bearing piece made of synthetic resin
301 hole
305 Radial groove
308, 309, 310, 311 Flat surface
312 recess

Claims (14)

円板状平面部を備えた合成樹脂製の上部ケースと、円板状平面部を備えた合成樹脂製の下部ケースと、該上、下部ケース間に配される合成樹脂製の軸受片とからなり、該上部ケースは該下部ケースに弾性装着させて下部ケースに組合されてなる合成樹脂製スラスト滑り軸受であって、該軸受片は、中央部に円孔を有する円板からなり、その上、下面に一端が該円孔に開口し、他端が外周面に開口する複数個の放射状溝を具備すると共に、該放射状溝によって分割されたその上、下面の夫々の分割面に平坦面部で囲まれた凹所を具備しており、該放射状溝及び凹所には潤滑油剤が充填されるようになっており、軸受片は、その上面の平坦面部が上部ケースの円板状平面部の下面に、その下面の平坦面部が下部ケースの円板状平面部の上面に夫々摺動自在に接触して、上、下部ケース間に配されている合成樹脂製スラスト滑り軸受。  An upper case made of synthetic resin having a disk-shaped flat portion, a lower case made of synthetic resin having a disk-shaped flat portion, and a synthetic resin bearing piece disposed between the upper and lower cases The upper case is a synthetic resin thrust sliding bearing which is elastically attached to the lower case and combined with the lower case, and the bearing piece is a disk having a circular hole in the center, A plurality of radial grooves having one end opened in the circular hole on the lower surface and the other end opened in the outer peripheral surface, and each of the divided surfaces on the lower surface is divided into flat surfaces by the radial grooves. The radial groove and the recess are filled with a lubricant, and the bearing piece has a flat surface portion on the upper surface of the disk-shaped flat portion of the upper case. On the lower surface, the flat surface portion of the lower surface is on the upper surface of the disk-shaped flat portion of the lower case, respectively. And movably contacting, on the thrust sliding bearing made of synthetic resin is disposed between the lower case. 円板状平面部を備えた合成樹脂製の上部ケースと、円板状平面部を備えた合成樹脂製の下部ケースと、該上、下部ケース間に配される合成樹脂製の軸受片とからなり、該上部ケースは該下部ケースに弾性装着させて下部ケースに組合されてなる合成樹脂製スラスト滑り軸受であって、該軸受片は、中央部に円孔を有する円板からなり、その上、下面に該円孔を囲む環状溝と、一端が該環状溝に開口し、他端が外周面に開口する複数個の放射状溝とを具備していると共に、該放射状溝によって分割されたその上、下面の夫々の分割面に平坦面部で囲まれた凹所を具備しており、該放射状溝、環状溝及び凹所には潤滑油剤が充填されるようになっており、軸受片は、その上面の平坦面部が上部ケースの円板状平面部の下面に、その下面の平坦面部が下部ケースの円板状平面部の上面に夫々摺動自在に接触して、上、下部ケース間に配されている合成樹脂製スラスト滑り軸受。  An upper case made of synthetic resin having a disk-shaped flat portion, a lower case made of synthetic resin having a disk-shaped flat portion, and a synthetic resin bearing piece disposed between the upper and lower cases The upper case is a synthetic resin thrust sliding bearing which is elastically attached to the lower case and combined with the lower case, and the bearing piece is a disk having a circular hole in the center, An annular groove surrounding the circular hole on the lower surface, and a plurality of radial grooves having one end opened in the annular groove and the other end opened in the outer peripheral surface, and divided by the radial groove The upper and lower surfaces are each provided with a recess surrounded by a flat surface portion, and the radial groove, the annular groove and the recess are filled with a lubricating oil agent. The flat surface portion of the upper surface is on the lower surface of the disk-shaped flat portion of the upper case, and the flat surface portion of the lower surface is The upper surface of the disk-shaped flat portion of the lower case in contact freely each slide on the thrust sliding bearing made of synthetic resin is disposed between the lower case. 放射状溝は、軸受片の上、下面に円周方向に等間隔に配されている請求項１又は２に記載の合成樹脂製スラスト滑り軸受。  The synthetic resin thrust sliding bearing according to claim 1 or 2, wherein the radial grooves are arranged at equal intervals in the circumferential direction on the upper and lower surfaces of the bearing piece. 凹所は、平坦面部の一方の内周縁と該一方の内周縁と相対向する平坦面部の他方の内周縁とから夫々中央部にかけて夫々漸次その深さが深くなるように凹曲面で規定されている請求項１から３のいずれか一項に記載の合成樹脂製スラスト滑り軸受。  The recess is defined by a concave curved surface so that the depth gradually increases from one inner peripheral edge of the flat surface portion and the other inner peripheral edge of the flat surface portion facing the one inner peripheral edge to the center portion, respectively. The thrust sliding bearing made of synthetic resin according to any one of claims 1 to 3. 凹所は、平坦面部の一方の内周縁と該一方の内周縁と相対向する平坦面部の他方の内周縁とから夫々中央部にかけて夫々漸次その深さが深くなるように錐面で規定されている請求項１から３のいずれか一項に記載の合成樹脂製スラスト滑り軸受。  The recess is defined by a conical surface so that the depth gradually increases from one inner peripheral edge of the flat surface portion and the other inner peripheral edge of the flat surface portion facing the one inner peripheral edge to the center portion, respectively. The thrust sliding bearing made of synthetic resin according to any one of claims 1 to 3. 上部ケースは、当該上部ケースの該円板状平面部の外周縁に一体に形成された円筒係合垂下部と、該円筒係合垂下部の端部内周面に形成された係合フック部とを更に備えており、上部ケースの円板状平面部は、中央部に円孔を有しており、下部ケースは、当該下部ケースの該円板状平面部の上面に形成された円筒部と、該円筒部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の外周縁に一体に形成された円筒係合突出部と、該円筒係合突出部の下端外周面に形成された係合部とを更に備えており、下部ケースの円板状平面部は、中央部に前記上部ケースの円板状平面部の円孔と同径の挿通孔を有しており、下部ケースの円筒部は、該挿通孔と同径の内径を有しており、該上部ケースは該係合フック部を係合部に弾性装着させて下部ケースに組合されてなる請求項１から５のいずれか一項に記載の合成樹脂製スラスト滑り軸受。  The upper case includes a cylindrical engagement hanging portion formed integrally with the outer peripheral edge of the disk-shaped flat portion of the upper case, and an engagement hook portion formed on the inner peripheral surface of the end portion of the cylindrical engagement hanging portion. The disc-shaped flat portion of the upper case has a circular hole in the central portion, and the lower case has a cylindrical portion formed on the upper surface of the disc-like flat portion of the lower case. A cylindrical engagement protrusion integrally formed on the outer peripheral edge of the disk-shaped flat portion of the lower case at a predetermined distance radially outward from the cylindrical portion, and an outer periphery of a lower end of the cylindrical engagement protrusion And a disc-shaped flat portion of the lower case has an insertion hole having the same diameter as the circular hole of the disc-shaped flat portion of the upper case at the center portion. The cylindrical portion of the lower case has the same inner diameter as the insertion hole, and the upper case elastically attaches the engaging hook portion to the engaging portion. Synthetic resin-made thrust sliding bearing according to any one of claims 1 to 5 comprising been combined into lower case. 円板の円孔は、該円筒部の外径よりも大きい径を有しており、円板は、該円筒係合突出部の内径よりも小さい外径を有していると共に、その上面を該上部ケースの円板状平面部の下面に、その下面を該下部ケースの円板状平面部の上面に夫々摺接させて該上、下部ケース間に配されている請求項６に記載の合成樹脂製スラスト滑り軸受。  The circular hole of the disk has a diameter larger than the outer diameter of the cylindrical portion, and the disk has an outer diameter smaller than the inner diameter of the cylindrical engagement protrusion, and the upper surface thereof is The lower surface of the disk-shaped flat portion of the upper case is disposed between the upper and lower cases with the lower surface thereof in sliding contact with the upper surface of the disk-shaped flat portion of the lower case, respectively. Synthetic plastic thrust plain bearing. 上部ケースは、当該上部ケースの該円板状平面部の下面に一体に形成された円筒垂下部と、該円筒垂下部と協働して環状の溝を形成するように、該円筒垂下部と径方向に所定の間隔を隔てて該円板状平面部の外周縁に一体に形成された円筒係合垂下部と、該円筒係合垂下部の端部内周面に形成された係合フック部とを更に備えており、上部ケースの円板状平面部は、中央部に円孔を有しており、円筒垂下部は、該上部ケースの円板状平面部の円孔の周縁から径方向外方に所定の間隔を隔てて上部ケースの円板状平面部の下面に一体に形成されており、下部ケースは、当該下部ケースの該円板状平面部の上面に形成された円筒部と、該円筒部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の上面に一体に形成され、該円筒部と下部ケースの円板状平面部の上面と協働して環状凹部を形成する円筒突出部と、該円筒突出部と協働して環状の溝を形成するように、該円筒突出部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の外周縁に一体に形成された円筒係合突出部と、該円筒係合突出部の下端外周面に形成された係合部とを更に備えており、下部ケースの円板状平面部は、中央部に前記上部ケースの円板状平面部の円孔と同径の挿通孔を有しており、下部ケースの円筒部は、該挿通孔と同径の内径を有しており、該上部ケースは、円筒垂下部の端部を円筒突出部の端部と径方向に重畳させ、係合フック部を係合部に弾性装着させて、下部ケースに組合されてなる請求項１から５のいずれか一項に記載の合成樹脂製スラスト滑り軸受。  The upper case includes a cylindrical hanging portion integrally formed on a lower surface of the disk-shaped flat portion of the upper case, and the cylindrical hanging portion so as to form an annular groove in cooperation with the cylindrical hanging portion. A cylindrical engagement hanging portion integrally formed on the outer peripheral edge of the disk-shaped flat portion at a predetermined interval in the radial direction, and an engagement hook portion formed on the inner peripheral surface of the end portion of the cylindrical engagement hanging portion The disk-shaped flat part of the upper case has a circular hole in the center, and the cylindrical hanging part is radially from the periphery of the circular hole of the disk-shaped flat part of the upper case. The lower case is integrally formed on the lower surface of the disk-shaped flat portion of the upper case with a predetermined interval outward, and the lower case is formed with a cylindrical portion formed on the upper surface of the disk-shaped flat portion of the lower case. The cylindrical portion is integrally formed on the upper surface of the disk-shaped flat portion of the lower case with a predetermined distance radially outward from the cylindrical portion; A cylindrical protrusion that forms an annular recess in cooperation with the upper surface of the disk-shaped flat portion of the part case, and a radial direction of the cylindrical protrusion so as to form an annular groove in cooperation with the cylindrical protrusion A cylindrical engagement protrusion formed integrally with the outer peripheral edge of the disk-shaped flat portion of the lower case with a predetermined interval outward, and an engagement formed on the outer peripheral surface of the lower end of the cylindrical engagement protrusion The disc-shaped flat portion of the lower case has an insertion hole having the same diameter as the circular hole of the disc-like flat portion of the upper case, and the cylindrical portion of the lower case. Has an inner diameter of the same diameter as the insertion hole, and the upper case overlaps the end portion of the cylindrical hanging portion with the end portion of the cylindrical protruding portion in the radial direction, and the engaging hook portion serves as the engaging portion. The synthetic resin thrust sliding bearing according to any one of claims 1 to 5, wherein the synthetic resin thrust sliding bearing is elastically mounted and combined with the lower case. 円板の円孔は、該円筒部の外径よりも大きい径を有しており、円板は、該円筒突出部の内径よりも小さい外径を有していると共に、その上面を該上部ケースの円板状平面部の下面に、その下面を該下部ケースの円板状平面部の上面に夫々摺接させて該上、下部ケース間に配されてなる請求項８に記載の合成樹脂製スラスト滑り軸受。  The circular hole of the disk has a diameter larger than the outer diameter of the cylindrical portion, and the disk has an outer diameter smaller than the inner diameter of the cylindrical protruding portion, and the upper surface thereof is 9. The synthetic resin according to claim 8, wherein the synthetic resin is disposed between the upper and lower cases, with the lower surface of the disk-shaped flat portion of the case being in sliding contact with the upper surface of the disk-shaped flat portion of the lower case. Thrust sliding bearing made of 上部ケースは、当該上部ケースの円板状平面部の下面に一体に形成された第一円筒垂下部と、該第一円筒垂下部の外周面と径方向外方に所定の間隔を隔てて該上部ケースの円板状平面部の下面に一体に形成された第二円筒垂下部と、該第二円筒垂下部と協働して環状の溝を形成するように、該第二円筒垂下部と径方向外方に所定の間隔を隔てて該上部ケースの円板状平面部の外周縁に一体に形成された円筒係合垂下部と、該円筒係合垂下部の端部内周面に形成された係合フック部とを備えており、上部ケースの円板状平面部は、中央部に円孔を有しており、下部ケースは、当該下部ケースの該円板状平面部の上面に一体に形成された第一円筒突出部と、該第一円筒突出部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の上面に一体に形成され、該第一円筒突出部と下部ケースの該円板状平面部の上面と協働して環状凹部を形成する第二円筒突出部と、該第二円筒突出部と下部ケースの該円板状平面部の上面と協働して環状の溝を形成するように、該第二円筒突出部の外周面と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の外周縁に一体に形成された円筒係合突出部と、該円筒係合突出部の下端外周面に形成された係合部とを更に備えており、下部ケースの円板状平面部は、中央部に前記上部ケースの円板状平面部の円孔と同径の挿通孔を有しており、下部ケースの第一円筒突出部は、該挿通孔から環状肩部を介して径方向外方に離れて下部ケースの該円板状平面部の上面に一体に形成されており、該上部ケースは、第一円筒垂下部の端部を第一円筒突出部の端部と径方向に、第二円筒垂下部の端部を第二円筒突出部の端部と径方向に夫々重畳させ、係合フック部を係合部に弾性装着させて、下部ケースに組合されてなる請求項１から５のいずれか一項に記載の合成樹脂製スラスト滑り軸受。  The upper case includes a first cylindrical hanging portion integrally formed on the lower surface of the disk-shaped flat portion of the upper case, and an outer circumferential surface of the first cylindrical hanging portion with a predetermined interval radially outward. A second cylindrical hanging portion integrally formed on the lower surface of the disk-shaped flat portion of the upper case, and the second cylindrical hanging portion so as to form an annular groove in cooperation with the second cylindrical hanging portion; A cylindrical engagement hanging portion integrally formed on the outer peripheral edge of the disk-like flat portion of the upper case with a predetermined interval radially outward, and formed on the inner peripheral surface of the end portion of the cylindrical engagement hanging portion. The disc-shaped flat portion of the upper case has a circular hole in the central portion, and the lower case is integrated with the upper surface of the disc-like flat portion of the lower case. A first cylindrical protrusion formed on the upper surface of the disk-shaped flat portion of the lower case with a predetermined distance radially outward from the first cylindrical protrusion. A second cylindrical projection formed integrally and forming an annular recess in cooperation with the upper surface of the disk-shaped flat portion of the first cylindrical projection and the lower case; the second cylindrical projection and the lower case; The disk-like shape of the lower case is spaced apart from the outer peripheral surface of the second cylindrical projecting portion in the radial direction so as to form an annular groove in cooperation with the upper surface of the disk-like flat portion. A disc-shaped flat portion of the lower case, further comprising: a cylindrical engagement protrusion integrally formed on the outer peripheral edge of the flat portion; and an engagement portion formed on the outer peripheral surface of the lower end of the cylindrical engagement protrusion. Has a through hole having the same diameter as the circular hole of the disk-shaped flat portion of the upper case at the center, and the first cylindrical protrusion of the lower case has a diameter from the insertion hole through the annular shoulder. It is formed integrally with the upper surface of the disk-shaped flat portion of the lower case, and is separated from the direction outward. The end of the second cylindrical hanging part is overlapped with the end of the second cylindrical protruding part in the radial direction in the radial direction with the end of the protruding part, and the engaging hook part is elastically attached to the engaging part. The synthetic resin thrust sliding bearing according to any one of claims 1 to 5, which is combined with a case. 円板の円孔は、該第一円筒突出部の外径よりも大きい径を有しており、円板は、該第二円筒突出部の内径よりも小さい外径を有すると共に、その上面を該上部ケースの円板状平面部の下面に、その下面を該下部ケースの円板状平面部の上面に夫々摺接させて該上、下部ケース間に配されてなる請求項１０に記載の合成樹脂製スラスト滑り軸受。  The circular hole of the disk has a diameter larger than the outer diameter of the first cylindrical protrusion, and the disk has an outer diameter smaller than the inner diameter of the second cylindrical protrusion, and the upper surface of the circular hole. The lower surface of the disk-shaped flat portion of the upper case is disposed between the upper and lower cases with the lower surface thereof being in sliding contact with the upper surface of the disk-shaped flat portion of the lower case. Synthetic plastic thrust plain bearing. 上部ケースは、当該上部ケースの円板状平面部の下面に一体に形成された第一円筒垂下部と、該第一円筒垂下部と径方向外方に所定の間隔を隔てて該円板状平面部の下面に一体に形成され、該第一円筒垂下部の外周面と協働して環状の溝を形成する第二円筒垂下部と、該第二円筒垂下部と径方向外方に所定の間隔を隔てて該円板状平面部の下面に一体に形成され、該第二円筒垂下部と円板状平面部の下面と協働して環状凹部を形成する第三円筒垂下部と、該第三円筒垂下部と協働して環状の溝を形成するように、第三円筒垂下部と径方向外方に所定の間隔を隔てて該円板状平面部の外周縁に一体に形成された円筒係合垂下部と、該円筒係合垂下部の端部内周面に形成された係合フック部とを更に備えており、上部ケースの円板状平面部は、中央部に円孔を有しており、第一円筒垂下部は、該上部ケースの円板状平面部の円孔と同径の内径をもって上部ケースの円板状平面部の下面に一体に形成されており、下部ケースは、当該下部ケースの該円板状平面部の上面に一体に形成された第一円筒突出部と、該第一円筒突出部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の上面に一体に形成され、該第一円筒突出部と協働して環状の溝を形成する第二円筒突出部と、下部ケースの該円板状平面部の上面に第二円筒突出部と径方向外方に所定の間隔を隔てて一体に形成され、該第二円筒突出部と下部ケースの該円板状平面部の上面と協働して環状凹部を形成する第三円筒突出部と、該第三円筒突出部と協働して環状の溝を形成するように、該第三円筒突出部と径方向外方に所定の間隔を隔てて下部ケースの該円板状平面部の外周縁に一体に形成された円筒係合突出部と、該円筒係合突出部の下端外周面に形成された係合部とを更に備えており、下部ケースの円板状平面部は、中央部に前記上部ケースの円板状平面部の円孔と同径の挿通孔を有しており、下部ケースの第一の円筒突出部は、該挿通孔から環状肩部を介して径方向外方に離れて下部ケースの円板状平面部の上面に一体に形成されており、該上部ケースは、第一円筒垂下部及び第二円筒垂下部の夫々の端部を第一円筒突出部及び第二円筒突出部の夫々の端部と、第三円筒垂下部の端部を第三円筒突出部の端部と夫々その径方向に重畳させ、係合フック部を係合部に弾性装着させて、下部ケースに組合されてなる請求項１から５のいずれか一項に記載の合成樹脂製スラスト滑り軸受。  The upper case has a first cylindrical hanging part integrally formed on the lower surface of the disk-like flat part of the upper case, and the disk-like shape spaced apart from the first cylindrical hanging part by a predetermined distance radially outward. A second cylindrical hanging portion that is integrally formed on the lower surface of the flat portion and forms an annular groove in cooperation with the outer peripheral surface of the first cylindrical hanging portion; A third cylindrical hanging portion that is integrally formed on the lower surface of the disk-shaped flat portion with an interval of, and forms an annular recess in cooperation with the lower surface of the second cylindrical hanging portion and the lower surface of the disk-shaped flat portion; Formed integrally with the outer peripheral edge of the disk-shaped flat portion at a predetermined distance radially outward from the third cylindrical hanging portion so as to form an annular groove in cooperation with the third cylindrical hanging portion. A cylindrical engagement drooping portion and an engagement hook portion formed on the inner peripheral surface of the end portion of the cylindrical engagement drooping portion. The first cylindrical hanging part is integrally formed on the lower surface of the disk-shaped flat part of the upper case with the same inner diameter as the circular hole of the disk-shaped flat part of the upper case. The lower case includes a first cylindrical protrusion integrally formed on the upper surface of the disk-shaped flat portion of the lower case, and a predetermined interval radially outward from the first cylindrical protrusion. A second cylindrical protrusion formed integrally on the upper surface of the disk-shaped flat portion of the lower case and forming an annular groove in cooperation with the first cylindrical protrusion; and the disk-shaped flat portion of the lower case An annular recess is formed integrally with the second cylindrical protrusion on the upper surface of the disk-shaped flat portion of the lower case, and is integrally formed with a predetermined distance radially outward. A third cylindrical projection that forms an annular groove in cooperation with the third cylindrical projection and radially outward from the third cylindrical projection. A cylindrical engagement protrusion formed integrally on the outer peripheral edge of the disk-shaped flat portion of the lower case with a predetermined interval, and an engagement portion formed on the outer peripheral surface of the lower end of the cylindrical engagement protrusion The disc-shaped flat portion of the lower case further includes an insertion hole having the same diameter as the circular hole of the disc-like flat portion of the upper case at the center, and the first cylindrical protrusion of the lower case The part is integrally formed on the upper surface of the disk-shaped flat part of the lower case and separated radially outward from the insertion hole via the annular shoulder, and the upper case includes the first cylindrical hanging part and the second cylindrical part. The ends of the two cylindrical hanging parts are respectively the first cylindrical protruding part and the second cylindrical protruding part, and the third cylindrical hanging part is the end of the third cylindrical protruding part and the radial direction thereof. The coupling according to any one of claims 1 to 5, wherein the engagement hook portion is elastically attached to the engagement portion and combined with the lower case. Synthetic plastic thrust plain bearing. 円板の円孔は、該第二円筒突出部の外径よりも大きい径を有しており、円板は、該第三円筒突出部の内径よりも小さい外径を有すると共に、その上面を該上部ケースの円板状平面部の下面に、その下面を該下部ケースの円板状平面部の上面に夫々摺接させて該上、下部ケース間に配されてなる請求項１２に記載の合成樹脂製スラスト滑り軸受。  The circular hole of the disk has a diameter larger than the outer diameter of the second cylindrical protrusion, and the disk has an outer diameter smaller than the inner diameter of the third cylindrical protrusion, and the upper surface thereof The lower surface of the disk-shaped flat portion of the upper case is disposed between the upper and lower cases with the lower surface thereof being in sliding contact with the upper surface of the disk-shaped flat portion of the lower case, respectively. Synthetic plastic thrust plain bearing. 下部ケースは、その下面に該挿通孔と同径の内径を有して一体に形成された円筒部を備えている請求項６から１３のいずれか一項に記載の合成樹脂製スラスト滑り軸受。  The synthetic resin thrust sliding bearing according to any one of claims 6 to 13, wherein the lower case includes a cylindrical portion integrally formed on the lower surface thereof with the same diameter as the insertion hole.
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* Cited by examiner, † Cited by third party
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