JPH0328184Y2 - - Google Patents

Description

【考案の詳細な説明】[Detailed explanation of the idea]

（産業上の利用分野） 本考案は合成樹脂スラスト軸受、とくに四輪自
動車におけるストラツトスラスト型サスペンシヨ
ン（マクフアーソン式）に組込まれて好適な合成
樹脂スラスト軸受に関するものである。 （従来技術） 一般にストラツト型サスペンシヨンは主として
四輪自動車の前輪に用いられ、主軸と一体となつ
た外筒の中に油圧式シヨツクアブソーバを内蔵し
たストラツトアツセンブリにコイルバネを組合わ
せたサスペンシヨンである。上記サスペンシヨン
には、ステアリング操作によりストラツトアツセ
ンブリがコイルバネとともに回るさい、該アツセ
ンブリのピストンロツドが回るものと、該ピスト
ンロツドが回らない型式のものとがあるが、いず
れの型式においてもストラツトアツセンブリの回
動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必要とさ
れる。 そして、従来よりこの個所の軸受にはボールあ
るいはニードルを使用した転がり軸受あるいは合
成樹脂製すべり軸受が使用されている。 第４図は合成樹脂すべり軸受を使用したストラ
ツトアツセンブリを示す従来例である。 図において、ストラツトアツセンブリＡを構成
するシヨツクアブソーバを内蔵したストラツト１
のピストンロツド２はその一端が該ストラツト１
のシヨツクアブソーバ内に挿入され、他端が該シ
ヨツクアブソーバより突出して車体にゴム弾性体
からなるマウントインシユレータを介して支持さ
れた取付部材３にナツト４で固定されている。該
ストラツト１の外周面に固定された下部バネ座シ
ート５と該下部バネ座シート５と相対向しかつピ
ストンロツド２の外周に遊挿された上部バネ座シ
ート６との間にはコイルバネ７が配されている。
該上部バネ座シート６の平面部８と取付部材３と
の間には、内面に挿通孔９を有する円筒部１０と
該円筒部１０の一方の端部に一体に形成された鍔
部１１とからなり、該鍔部外周面にゴム弾性体か
らなるダストシール１２を装着した合成樹脂スラ
スト軸受１３が円筒部１０の内面挿通孔９を前記
ピストンロツド２の外周面に嵌挿させ、かつ円筒
部外周面を上部バネ座シート６の平面部８の孔に
嵌合させて配されている。 （考案が解決しようとする問題点） 上述した従来技術において、スラスト軸受の鍔
部外周面に装着されたダストシールは該軸受の摺
動面への塵埃等の侵入を防止する目的として相対
回転する摺動面間に密に摺接させて配されるた
め、ステアリング操作時にはその摺動摩擦力が高
く操舵力を増大させるという欠点がある。 また、スラスト軸受の相手材となる取付部材は
通常板金加工によつて形成されているため、平担
度、平面度が十分でなく、これらに起因する片当
たり現象等を生じて該軸受に偏摩耗を惹起すると
いう欠点がある。 本考案は上述した従来の欠点を解決するべくな
されたもので、摺動面への塵埃等の侵入を防止
し、ステアリング操作時の操舵力の増大を防止で
き、かつ相手材の平担度、平面度の不具合を吸収
することのできる合成樹脂スラスト軸受を得るこ
とを目的とするものである。 （問題点を解決するための手段） 上述した目的を達成するべく本考案はつぎの技
術的手段、すなわち構成を採る。 合成樹脂製ケースと該ケースに摺接嵌合される
合成樹脂軸受体とからなり、該ケースは内面に挿
通孔を有する円筒部と該円筒部の端部外周面に一
体に形成された幅広鍔部と該鍔部外周縁に一体に
形成された環状突出部と該環状突出部の端部内、
外周面に形成された内、外周係合部と該鍔部上面
に形成された略円筒軸受部とを備え、該軸受体は
中央部に円孔を有する円板状部と該円板状部の下
面に形成された円筒軸受部と該軸受部の内周面と
環状溝を隔てかつ先端を該軸受部の端面より突出
させるとともに該円孔に連続して形成された環状
突出部と該軸受部の外周面と環状溝を隔てかつ先
端を該軸受部の端面より突出させて形成された環
状垂下部と該垂下部の外周面に形成された係合段
部とを備え、該軸受体は円筒軸受部の端面を前記
ケース鍔部の略円筒軸受部端面に摺接させ、環状
突出部および環状垂下部の端部を該軸受部の端面
よりそれぞれ突出させ、環状垂下部外周面の係合
段部をケースの環状突出部の内周係合部に弾性装
着させて相対回転可能に該ケースと組合わされて
おり、該軸受体の円板状部上面には、中央部に円
孔を有する補強円板と該円板の上面を覆いかつ外
周面を覆つて垂下する円筒部と該円筒部の先端に
内方に狭窄する環状リツプ部を備えたゴム弾性体
からなる弾性シール体が該環状リツプ部を前記ケ
ースの環状突出部の外周係合部に密接させて配さ
れていることを特徴とする合成樹脂スラスト軸受
である。 上述した構成において、ケースを構成する合成
樹脂は、耐摩耗性、耐衝撃性、耐クリープ性など
の機械的特性に優れていることが必要であり、ま
たケースに摺接嵌合される合成樹脂軸受体にはと
くに自己潤滑性を有するものが好ましく、例えば
ポリアセタール樹脂、ポリアミド樹脂、ポリブチ
レンテレフタレート（PBT）などのポリエステ
ル樹脂、ポリエチレン、ポリプロピレンなどのポ
リオレフイン樹脂などが良好に使用され、このほ
かポリカーボネート樹脂なども使用し得る。 ケースには、上記軸受体と同様の合成樹脂が使
用されるが、とくに該軸受体に使用される合成樹
脂と摩擦特性の良好な組合わせであつて、しかも
比較的剛性の高い合成樹脂材料であることが望ま
しい。 その望ましい組合わせについて例示すると下表
のとおりである。 (Field of Industrial Application) The present invention relates to a synthetic resin thrust bearing, particularly a synthetic resin thrust bearing suitable for being incorporated into a strut thrust type suspension (McPherson type) in a four-wheeled vehicle. (Prior art) Strut-type suspensions are generally used mainly for the front wheels of four-wheeled vehicles, and are suspensions that combine coil springs with a strut assembly that has a hydraulic shock absorber built into an outer cylinder that is integrated with the main shaft. It is. Among the above suspensions, when the strut assembly rotates with the coil spring due to steering operation, there are types in which the piston rod of the assembly rotates, and there are types in which the piston rod does not rotate, but in both types, the strut assembly does not rotate. In order to allow smooth rotation of the coil spring, a bearing is required between the mounting member of the vehicle body and the upper spring seat of the coil spring. Conventionally, rolling bearings using balls or needles, or sliding bearings made of synthetic resin have been used for bearings at this location. FIG. 4 shows a conventional example of a strut assembly using a synthetic resin sliding bearing. In the figure, strut 1 with a built-in shock absorber that constitutes strut assembly A is shown.
The piston rod 2 has one end connected to the strut 1.
It is inserted into the shock absorber of the vehicle, and its other end protrudes from the shock absorber and is fixed with a nut 4 to a mounting member 3 which is supported by the vehicle body via a mount insulator made of a rubber elastic body. A coil spring 7 is disposed between a lower spring seat 5 fixed to the outer circumferential surface of the strut 1 and an upper spring seat 6 facing the lower spring seat 5 and loosely inserted on the outer periphery of the piston rod 2. has been done.
Between the flat part 8 of the upper spring seat sheet 6 and the mounting member 3, there is a cylindrical part 10 having an insertion hole 9 on the inner surface, and a collar part 11 integrally formed at one end of the cylindrical part 10. A synthetic resin thrust bearing 13 having a dust seal 12 made of a rubber elastic body attached to the outer circumferential surface of the flange fits the inner insertion hole 9 of the cylindrical portion 10 into the outer circumferential surface of the piston rod 2, and the outer circumferential surface of the cylindrical portion is fitted into a hole in the flat part 8 of the upper spring seat sheet 6. (Problems to be Solved by the Invention) In the above-mentioned conventional technology, the dust seal attached to the outer circumferential surface of the flange of the thrust bearing is a sliding member that rotates relatively for the purpose of preventing dust from entering the sliding surface of the bearing. Since it is disposed in close sliding contact between the moving surfaces, there is a drawback that the sliding friction force is high during steering operation, increasing the steering force. In addition, since the mounting member that is the mating material of the thrust bearing is usually formed by sheet metal processing, it does not have sufficient flatness and flatness, and this causes uneven contact, etc., and the bearing is biased. It has the disadvantage of causing wear. The present invention has been developed to solve the above-mentioned conventional drawbacks, and can prevent dust from entering the sliding surface, prevent an increase in steering force during steering operation, and improve the flatness of the mating material. The object of the present invention is to obtain a synthetic resin thrust bearing that can absorb defects in flatness. (Means for solving the problems) In order to achieve the above-mentioned object, the present invention adopts the following technical means, that is, the configuration. It consists of a synthetic resin case and a synthetic resin bearing body that is slidably fitted into the case. an annular protrusion integrally formed on the outer peripheral edge of the collar; and an end portion of the annular protrusion;
The bearing body includes an inner and outer circumferential engaging portion formed on the outer circumferential surface and a substantially cylindrical bearing portion formed on the upper surface of the flange portion, and the bearing body includes a disk-shaped portion having a circular hole in the center and the disk-shaped portion. A cylindrical bearing part formed on the lower surface of the bearing part, an annular protrusion part that separates the inner peripheral surface of the bearing part from the annular groove, has a tip protruding from the end face of the bearing part, and is continuous with the circular hole, and the bearing part. The bearing body includes an annular hanging part formed with an annular groove separating the outer peripheral surface of the bearing part and a tip thereof protruding from the end face of the bearing part, and an engagement stepped part formed on the outer peripheral surface of the hanging part. The end surface of the cylindrical bearing portion is brought into sliding contact with the end surface of the substantially cylindrical bearing portion of the case flange, and the ends of the annular protruding portion and the annular hanging portion are respectively projected from the end surface of the bearing portion, and the outer circumferential surface of the annular hanging portion is engaged. The stepped portion is elastically attached to the inner peripheral engagement portion of the annular protrusion of the case, and is combined with the case so as to be relatively rotatable, and the upper surface of the disc-shaped portion of the bearing body has a circular hole in the center. An elastic seal body made of a rubber elastic body includes a reinforcing disk, a cylindrical portion that hangs down to cover the upper surface of the disk and the outer peripheral surface, and an annular lip portion that narrows inward at the tip of the cylindrical portion. The synthetic resin thrust bearing is characterized in that the lip portion is disposed in close contact with the outer peripheral engagement portion of the annular protrusion of the case. In the above configuration, the synthetic resin that makes up the case must have excellent mechanical properties such as abrasion resistance, impact resistance, and creep resistance. It is particularly preferable for the bearing body to have self-lubricating properties; for example, polyester resins such as polyacetal resin, polyamide resin, polybutylene terephthalate (PBT), polyolefin resins such as polyethylene and polypropylene, etc. are well used, and in addition, polycarbonate resins are used. etc. can also be used. The case is made of the same synthetic resin as the bearing body, but the case is made of a synthetic resin material that has a good combination of frictional properties with the synthetic resin used for the bearing body, and is relatively rigid. It is desirable that there be. Examples of desirable combinations are shown in the table below.

【表】 表中、摩擦特性はつぎの試験条件により行つた
結果である。 （試験条件） スラスト荷重：350Kg、揺動角度：±35゜ 揺動速度：60cpm、 潤滑：始動時シリコングリースを摺動面に塗布 なお、摩耗量は、上記試験を100万サイクル行
つた後の軸受体の寸法変化量（mm）を示す。 また、上記構成において、軸受摺接面、すなわ
ち軸受体の円筒軸受部端面とケース幅広鍔部上面
の略円筒軸受部端面との摺接面は、該鍔部の上面
より上方に形成されていること、該摺接面は該軸
受体の環状突出部および環状垂下部によつてその
内、外縁部が覆われていること、該軸受体とケー
スとの弾性装着部に形成されたラビリンス作用に
よる密封部により、さらには該軸受体上面に配さ
れ環状リツプ部をケースの環状突出部の外周係合
部に密接させた弾性シール体とにより当該摺接面
への外部からの塵埃等の侵入に対し保護されてい
る。 （実施例） 以下、本考案をその実施例を示す添付図面の第
１図乃至第２図によつて詳細に説明する。 ２０は合成樹脂スラスト軸受であり、該スラス
ト軸受２０は合成樹脂製ケース３０と該ケース３
０に摺接嵌合される合成樹脂軸受体４０と該軸受
体４０の上面に配される弾性シール体５０とから
なる。 該ケース３０は、内面に挿通孔３１を有する円
筒部３２と該円筒部３２の端部外周面に一体に形
成された幅広鍔部３３と該鍔部３３の外周縁に一
体に形成された環状突出部３４と該突出部３４の
端部内、外周面に形成された内、外周係合部３
５，３６と該幅広鍔部３３の上面に形成された略
円筒軸受部３７とを備えている。 該内、外周係合部３５，３６は該環状突出部の
内、外周面から先端にかけて形成されたテーパー
面部からなる。 該合成樹脂軸受体４０は、中央部に前記ケース
３０の挿通孔３１と連通する円孔４１を有する円
板状部４２と該円板状部４２の下面に一体に形成
された円筒軸受部４３と該軸受部の内周面と環状
溝４４を隔てかつ先端部を該軸受部の端面より突
出させるとともに該円孔４１に連続して形成され
た環状突出部４５と該軸受部４３の外周面と環状
溝４６を隔てかつ先端部を該軸受部の端面より突
出させて形成された環状垂下部４７と該垂下部４
７の外周面に形成された係合段部４８とを備えて
いる。 該係合段部４８は前記ケース３０の環状突出部
３４の内周係合部３５を構成するテーパー面部に
対応するテーパー面部からなる。 該軸受体４０の円筒軸受部４３の端面には内周
面から外周面にかけて放射状に複数個の凹溝４９
が周方向に形成されており、該凹溝４９はグリー
スなどの潤滑油の溜まり部となる。 該軸受体４０は円筒軸受部４３の端面をケース
３０の幅広鍔部３３上面の略円筒軸受部３７端面
に摺接させ、環状垂下部４７外周面の係合段部４
８を該ケース３０の環状突出部３４の内周係合部
３５に弾性装着させて相対回転可能に該ケースと
組合わされており、該弾性装着部においてラビリ
ンス作用による密封部が形成されている。 弾性シール体５０は、中央部に円孔５１を有す
る補強円板５２と該補強円板５２の上面を覆いか
つ外周面を覆つて垂下する円筒部５３と該円筒部
５３の端部に内方に狭窄する環状リツプ部５４と
を備えたゴム弾性体とから構成されている。該弾
性シール体５０は、補強円板５２を前記軸受体４
０の円板状部４２上面に位置させ、環状リツプ部
５４をケース３０の環状突出部３４の外周係合部
３６に密接させて配されている。 第３図は上述した構成からなる合成樹脂スラス
ト軸受２０を前述したストラツトアツセンブリＡ
に適用した例を示すものである。 すなわち、ケース３０の円筒部３２の挿通孔３
１および軸受体４０の円孔４１をストラツト１の
ピストンロツド２の外周面に挿通し、該ケース３
０の円筒部３２外周面を上部バネ座シート６の孔
に嵌合するとともに該ケース３０の幅広鍔部３３
下面を該シート６の平面部に当接させ、軸受体４
０の上面に配された弾性シール体５０を車体側取
付部材３に当接させて配置するものである。 この配置において、軸受摺接面は、ケース３０
の幅広鍔部３３の上面より上方に形成されている
こと、該軸受体４０の環状突出部４５および環状
垂下部４７によつて該摺接面の内、外縁部が覆わ
れていること、該軸受体４０とケース３０との弾
性装着部に形成されたラビリンス作用による密封
部により、さらに該軸受体４０上面に配され環状
リツプ部５４をケースの環状突出部の外周係合部
３６に密接させた弾性シール体５０とにより保護
されているので当該摺接面への外部からの塵埃等
の侵入は防止される。 また、該取付部材３に平担度、平面度の不具合
があつても、当該不具合は該シール体５０によつ
て吸収されるため、該軸受に片当たり現象等は生
じず、偏摩耗を惹起させることはない。 （効果） 上述した構成からなる本考案の合成樹脂スラス
ト軸受は以下に述べる特有の効果を有する。 軸受摺接面は、ケースの幅広鍔部上面より上
方に形成されていること、軸受体の環状突出部
および環状垂下部によつて該摺接面の内、外縁
部が覆われていること、さらにケースと軸受体
との弾性装着部に形成されたラビリンス作用に
よる密封部と該軸受体上面に配され環状リツプ
部をケースの外周係合部に密接させた弾性シー
ル体により当該摺接面への外部からの塵埃等の
侵入から保護される。 摺接面は自己潤滑性に優れた合成樹脂同志の
組合わせによつて形成されているので、摩擦係
数が小さく安定した操舵力が長期間にわたつて
維持される。 ケースと軸受体とは弾性装着により組合わさ
れるので、その組立て作業が極めて簡単であ
る。 取付部材に平担度、平面度の不具合があつて
も、当該不具合は弾性シール体によつて吸収さ
れるため、軸受に片当たり現象ひいては偏摩耗
を生じることがない。[Table] In the table, the friction characteristics are the results obtained under the following test conditions. (Test conditions) Thrust load: 350Kg, Swing angle: ±35° Swing speed: 60cpm, Lubrication: Apply silicone grease to the sliding surface at startup.The amount of wear is calculated after 1 million cycles of the above test. Indicates the amount of dimensional change (mm) in the bearing body. Further, in the above configuration, the bearing sliding surface, that is, the sliding surface between the end surface of the cylindrical bearing portion of the bearing body and the substantially cylindrical bearing portion end surface of the upper surface of the wide flange of the case is formed above the upper surface of the flange. In particular, the inner and outer edges of the sliding surface are covered by the annular protruding part and the annular hanging part of the bearing body, and the sliding surface is covered by a labyrinth action formed in the elastic attachment part between the bearing body and the case. The sealing portion and the elastic sealing body disposed on the upper surface of the bearing body and having the annular lip portion brought into close contact with the outer peripheral engagement portion of the annular protrusion of the case prevent dust from entering the sliding contact surface from the outside. protected against. (Embodiments) Hereinafter, the present invention will be explained in detail with reference to FIGS. 1 and 2 of the accompanying drawings showing embodiments thereof. 20 is a synthetic resin thrust bearing, and the thrust bearing 20 is connected to a synthetic resin case 30 and the case 3.
It consists of a synthetic resin bearing body 40 which is slidably fitted into the bearing body 40, and an elastic seal body 50 which is disposed on the upper surface of the bearing body 40. The case 30 includes a cylindrical portion 32 having an insertion hole 31 on the inner surface, a wide flange 33 integrally formed on the outer peripheral surface of the end of the cylindrical portion 32, and an annular portion integrally formed on the outer periphery of the flange 33. The protrusion 34 and the inner and outer engagement portions 3 formed on the inner and outer peripheral surfaces of the protrusion 34
5 and 36, and a substantially cylindrical bearing portion 37 formed on the upper surface of the wide collar portion 33. The inner and outer circumferential engaging portions 35 and 36 are tapered surface portions formed from the inner and outer circumferential surfaces of the annular protrusion to the tip. The synthetic resin bearing body 40 includes a disk-shaped portion 42 having a circular hole 41 in the center that communicates with the insertion hole 31 of the case 30, and a cylindrical bearing portion 43 integrally formed on the lower surface of the disk-shaped portion 42. and an annular protrusion 45 formed continuously with the circular hole 41, separating the inner circumferential surface of the bearing section from the annular groove 44, and having a tip protruding from the end surface of the bearing section, and an outer circumferential surface of the bearing section 43. and an annular hanging part 47 which is formed with an annular groove 46 between the two and a tip part protruding from the end surface of the bearing part, and the hanging part 4.
7, and an engagement step portion 48 formed on the outer circumferential surface of 7. The engagement step portion 48 is formed of a tapered surface portion corresponding to the tapered surface portion constituting the inner peripheral engagement portion 35 of the annular protrusion 34 of the case 30. The end surface of the cylindrical bearing portion 43 of the bearing body 40 is provided with a plurality of grooves 49 radially extending from the inner peripheral surface to the outer peripheral surface.
is formed in the circumferential direction, and the groove 49 serves as a reservoir for lubricating oil such as grease. The bearing body 40 has the end face of the cylindrical bearing part 43 in sliding contact with the end face of the substantially cylindrical bearing part 37 on the upper surface of the wide collar part 33 of the case 30, and the engagement step part 4 on the outer peripheral surface of the annular hanging part 47.
8 is elastically attached to the inner circumferential engagement portion 35 of the annular protrusion 34 of the case 30 and combined with the case so as to be relatively rotatable, and a sealing portion is formed by a labyrinth effect at the elastic attachment portion. The elastic seal body 50 includes a reinforcing disk 52 having a circular hole 51 in the center, a cylindrical portion 53 that hangs down to cover the upper surface of the reinforcing disk 52 and the outer circumferential surface, and an inner portion at the end of the cylindrical portion 53. It is composed of a rubber elastic body having an annular lip portion 54 that narrows at the bottom. The elastic seal body 50 connects the reinforcing disk 52 to the bearing body 4.
The annular lip portion 54 is placed in close contact with the outer peripheral engagement portion 36 of the annular protrusion 34 of the case 30. FIG. 3 shows a strut assembly A in which the synthetic resin thrust bearing 20 having the above-mentioned structure is used.
The following is an example of how this method is applied. That is, the insertion hole 3 of the cylindrical portion 32 of the case 30
1 and the circular hole 41 of the bearing body 40 are inserted into the outer peripheral surface of the piston rod 2 of the strut 1, and the case 3
The outer peripheral surface of the cylindrical portion 32 of 0 is fitted into the hole of the upper spring seat sheet 6, and the wide flange portion 33 of the case 30 is fitted.
The lower surface is brought into contact with the flat surface of the sheet 6, and the bearing body 4 is
The elastic seal body 50 disposed on the upper surface of the vehicle body side mounting member 3 is placed in contact with the vehicle body side mounting member 3. In this arrangement, the bearing sliding surface is the case 30
The inner and outer edges of the sliding surface are covered by the annular protruding portion 45 and the annular hanging portion 47 of the bearing body 40; The labyrinth seal formed in the elastic mounting portion between the bearing body 40 and the case 30 further brings the annular lip portion 54 disposed on the upper surface of the bearing body 40 into close contact with the outer peripheral engagement portion 36 of the annular protrusion of the case. Since it is protected by the elastic seal body 50, dust and the like from the outside are prevented from entering the sliding surface. Furthermore, even if there is a problem with the flatness or flatness of the mounting member 3, the problem is absorbed by the seal body 50, so uneven contact does not occur in the bearing, causing uneven wear. I won't let you. (Effects) The synthetic resin thrust bearing of the present invention having the above-described configuration has the following unique effects. The bearing sliding surface is formed above the upper surface of the wide flange of the case, and the inner and outer edges of the sliding surface are covered by the annular protruding portion and the annular hanging portion of the bearing body. In addition, a labyrinth seal formed in the elastic attachment part between the case and the bearing body and an elastic seal body arranged on the upper surface of the bearing body and having an annular lip part brought into close contact with the outer circumferential engagement part of the case are used to connect the sliding surface to the sliding surface. protected from intrusion of dust, etc. from the outside. Since the sliding surface is formed of a combination of synthetic resins with excellent self-lubricating properties, the coefficient of friction is small and stable steering force is maintained over a long period of time. Since the case and the bearing body are assembled together by elastic attachment, the assembly work is extremely simple. Even if there is a problem with the flatness or flatness of the mounting member, the problem is absorbed by the elastic seal, so that uneven contact and uneven wear on the bearing will not occur.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の合成樹脂スラスト軸受を示す
縦断面図、第２図は合成樹脂軸受体の底面図、第
３図は該軸受をストラツトアツセンブリに適用し
た例を示す縦断面図、第４図は従来のストラツト
アツセンブリを示す縦断面図である。 ２０……合成樹脂スラスト軸受、３０……合成
樹脂製ケース、３２……円筒部、３３……幅広鍔
部、３４……環状突出部、３５，３６……内、外
周係合部、３７……略円筒軸受部、４０……合成
樹脂軸受体、４２……円板状部、４３……円筒軸
受部、４５……環状突出部、４７……環状垂下
部、４８……係合段部、５０……弾性シール体、
５２……補強円板。 FIG. 1 is a longitudinal sectional view showing the synthetic resin thrust bearing of the present invention, FIG. 2 is a bottom view of the synthetic resin bearing body, and FIG. 3 is a longitudinal sectional view showing an example in which the bearing is applied to a strut assembly. FIG. 4 is a longitudinal sectional view showing a conventional strut assembly. 20...Synthetic resin thrust bearing, 30...Synthetic resin case, 32...Cylindrical part, 33...Wide collar part, 34...Annular protrusion part, 35, 36...Inner and outer peripheral engagement part, 37... ...Substantially cylindrical bearing part, 40...Synthetic resin bearing body, 42...Disc shaped part, 43...Cylindrical bearing part, 45...Annular protrusion part, 47...Annular hanging part, 48...Engagement step part , 50... elastic seal body,
52...Reinforcement disk.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 合成樹脂製ケース３０と該ケースに摺接嵌合さ
れる合成樹脂軸受体４０とからなり、該ケース３
０は内面に挿通孔３１を有する円筒部３２と該円
筒部の端部外周面に一体に形成された幅広鍔部３
３と該鍔部外周縁に一体に形成された環状突出部
３４と該環状突出部の端部内、外周面に形成され
た内、外周係合部３５，３６と該鍔部上面に形成
された略円筒軸受部３７とを備え、該軸受体４０
は中央部に円孔４１を有する円板状部４２と該円
板状部の下面に形成された円筒軸受部４３と該軸
受部の内周面と環状溝４４を隔てかつ先端を軸受
部の端面より突出させるとともに該円孔４１に連
続して形成された環状突出部４５と該軸受部の外
周面と環状溝４６を隔てかつ先端を該軸受部の端
面より突出させて形成された環状垂下部４７と該
垂下部の外周面に形成された係合段部４８とを備
え、該軸受体４０は円筒軸受部４３の端面を前記
ケース鍔部の略円筒軸受部３７端面に摺接させ、
環状突出部４５および環状垂下部４７の端部を該
軸受部の端面よりそれぞれ突出させ、環状垂下部
４７外周面の係合段部４８をケースの環状突出部
の内周係合部３５に弾性装着させて相対回転可能
に該ケースと組合わされており、該軸受体４０の
円板状部４２上面には、中央部に円孔５１を有す
る補強円板５２と該円板の上面を覆いかつ外周面
を覆つて垂下する円筒部５３と該円筒部の先端に
内方に狭窄する環状リツプ部５４を備えたゴム弾
性体からなる弾性シール体５０が該環状リツプ部
５４を前記ケースの環状突出部３４の外周係合部
３６に密接させて配されていることを特徴とする
合成樹脂スラスト軸受。 The case 3 consists of a synthetic resin case 30 and a synthetic resin bearing body 40 that is slidably fitted into the case.
0 is a cylindrical part 32 having an insertion hole 31 on the inner surface, and a wide flange part 3 integrally formed on the outer peripheral surface of the end of the cylindrical part.
3, an annular protrusion 34 integrally formed on the outer periphery of the flange, inner and outer peripheral engaging parts 35 and 36 formed on the inner and outer peripheral surfaces of the annular protrusion, and formed on the upper surface of the flange. substantially cylindrical bearing portion 37, and the bearing body 40
A disc-shaped part 42 having a circular hole 41 in the center, a cylindrical bearing part 43 formed on the lower surface of the disc-shaped part, and an annular groove 44 separated from the inner peripheral surface of the bearing part, and a tip of the bearing part. An annular protrusion 45 that protrudes from the end face and is continuous with the circular hole 41, and an annular droop that separates the outer peripheral surface of the bearing from the annular groove 46 and has its tip protruding from the end face of the bearing. 47 and an engaging stepped portion 48 formed on the outer peripheral surface of the hanging portion, the bearing body 40 has an end surface of the cylindrical bearing portion 43 in sliding contact with an end surface of the substantially cylindrical bearing portion 37 of the case flange portion,
The ends of the annular protruding part 45 and the annular hanging part 47 are made to protrude from the end surface of the bearing part, respectively, and the engaging step part 48 on the outer peripheral surface of the annular hanging part 47 is elastically connected to the inner peripheral engaging part 35 of the annular projecting part of the case. It is mounted and combined with the case so as to be relatively rotatable, and on the upper surface of the disc-shaped portion 42 of the bearing body 40, there is a reinforcing disc 52 having a circular hole 51 in the center and a reinforcing disc 52 that covers the upper surface of the disc and covers the upper surface of the disc. An elastic seal body 50 made of a rubber elastic body has a cylindrical portion 53 that hangs down to cover the outer peripheral surface, and an annular lip portion 54 that narrows inward at the tip of the cylindrical portion. A synthetic resin thrust bearing characterized in that the synthetic resin thrust bearing is disposed in close contact with the outer peripheral engagement part 36 of the part 34.