JP4385823B2 - Strut ball bearing - Google Patents

Strut ball bearing Download PDF

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JP4385823B2
JP4385823B2 JP2004102938A JP2004102938A JP4385823B2 JP 4385823 B2 JP4385823 B2 JP 4385823B2 JP 2004102938 A JP2004102938 A JP 2004102938A JP 2004102938 A JP2004102938 A JP 2004102938A JP 4385823 B2 JP4385823 B2 JP 4385823B2
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race
strut
ball bearing
outer diameter
spring upper
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JP2005291232A (en
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広 矢野
貴信 村上
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JTEKT Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/588—Races of sheet metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)
  • Rolling Contact Bearings (AREA)

Description

本発明は、例えば車両のストラット式サスペンションに用いるストラット用玉軸受に関する。   The present invention relates to a ball bearing for struts used for, for example, a strut suspension of a vehicle.

ストラット式サスペンションは、ショックアブソーバーの周囲にコイルスプリングが装着されたもので、上部がストラットインシュレータを介して車体（ボディ）に支持され、下部がロアアームで支持される。このようなサスペンション用としての玉軸受（ストラット用玉軸受）は、ストラットインシュレータと、コイルスプリングの上端を受けるスプリングアッパシートとの間に組み込まれる。このストラット用玉軸受は、薄肉鋼板をプレス成形してなる二つのレース間に複数個の玉を介装し、両レースの径方向内外の端部を、互いに微小隙間を介して対向するように屈曲し、これら両レースの端部に相手側に接触するシールリップを設けて、その密封性を確保している（例えば特許文献１参照）。   The strut suspension has a coil spring mounted around a shock absorber, and an upper part is supported by a vehicle body (body) via a strut insulator and a lower part is supported by a lower arm. Such a ball bearing for suspension (ball bearing for struts) is incorporated between a strut insulator and a spring upper seat that receives the upper end of a coil spring. In this strut ball bearing, a plurality of balls are interposed between two races formed by press-forming a thin steel plate so that the inner and outer ends of both races face each other with a minute gap therebetween. A sealing lip that bends and contacts the other side is provided at the ends of both races to ensure the sealing performance (see, for example, Patent Document 1).

しかしながら、ストラット用玉軸受の外径側から泥水や粉塵などが直接的にかかることがあって、ストラット用玉軸受内部に泥水や粉塵が侵入する可能性が高く、そのため、当該軸受の寿命を延ばすためにその密封性をより向上させることが要求されてきている。
特開平７−７７２２０号公報 However, muddy water and dust may be directly applied from the outer diameter side of the strut ball bearing, and there is a high possibility that muddy water and dust will enter the strut ball bearing, thus extending the life of the bearing. Therefore, it has been required to further improve the sealing performance.
Japanese Unexamined Patent Publication No. 7-77220

そこで、本発明は、ストラット式サスペンションに用いるストラット用玉軸受において、部品点数を増やすことなく、所定の密封性を確保できるようにしたものである。   In view of the above, the present invention provides a strut ball bearing for use in a strut type suspension that can ensure a predetermined sealing performance without increasing the number of components.

本発明に係るストラット用玉軸受は、ストラットインシュレータとスプリングアッパシートとの外径側対向間に配置されるストラット用玉軸受であって、ストラットインシュレータ側に配置される環状の第１レースと、スプリングアッパシート側に配置される環状の第２レースと、上記両レース間に転動自在に介装される複数個の玉とを備え、上記第１レースの外径側を、ストラットインシュレータとスプリングアッパシートとの外径側の対向すきまを介して当該すきまの外側にまで拡径しながら延長させた延長部とし、その延長部を、スプリングアッパシートとの対向すきまによりラビリンスシール構造の非密封部を構成するものとしたことを特徴とするものである。
また、本発明に係るストラット用玉軸受においては、上記延長部は、拡径しながら軸方向一方に延びる延長部となっていて、上記スプリングアッパシートの外径側で軸方向下向きに延びる外筒部との間に微小なすきまを介して略平行に対向していることが好ましい。 The strut ball bearing according to the present invention is a strut ball bearing disposed between the strut insulator and the spring upper sheet facing the outer diameter side, and an annular first race disposed on the strut insulator side, and a spring. An annular second race disposed on the upper seat side, and a plurality of balls interposed between the two races so as to be freely rollable. A strut insulator and a spring upper are provided on the outer diameter side of the first race. The extension is extended to the outside of the clearance through the opposing clearance on the outer diameter side of the seat, and the extension is used as the unsealed portion of the labyrinth seal structure by the clearance facing the spring upper seat. It is characterized in that it is configured.
Moreover, in the ball bearing for struts according to the present invention, the extension portion is an extension portion that extends in the axial direction while expanding the diameter, and is an outer cylinder that extends downward in the axial direction on the outer diameter side of the spring upper seat. It is preferable that they face each other substantially in parallel with a small gap.

この場合、ストラット用玉軸受の構成部品を利用して非接触密封部を作っており、余分な部品を必要としない。また、非接触密封部によって、泥水や粉塵などが、当該軸受内部に侵入してくる可能性を低減する。しかも、第１レースとスプリングアッパシートとの相対位置が設計上特定されるものであるから、第１レースとスプリングアッパシートとの間の対向すきまの管理が容易かつ高精度に行うことが可能で、非接触密封部による密封性を高める上でも、より効果的となる。   In this case, the non-contact sealing portion is made by using the components of the strut ball bearing, and no extra parts are required. Further, the non-contact sealing portion reduces the possibility that muddy water, dust or the like enters the bearing. Moreover, since the relative position between the first race and the spring upper seat is specified by design, the facing clearance between the first race and the spring upper seat can be easily and accurately controlled. Also, it is more effective in enhancing the sealing performance by the non-contact sealing portion.

好ましくは、上記両レースの内外径側に、互いの相手となるレースに接触して接触密封部を作るシールリップを設けることができる。このように非接触密封部に加えて、接触密封部を形成した多段の密封構造とすれば、密封性能の向上に貢献できる。   Preferably, a sealing lip that makes contact sealing portions by contacting the races that are the other party can be provided on the inner and outer diameter sides of the both races. Thus, if it is set as the multistage sealing structure which formed the contact sealing part in addition to the non-contact sealing part, it can contribute to the improvement of sealing performance.

本発明によれば、部品点数を増やすことなく、所定の密封性を確保できる。   According to the present invention, it is possible to ensure a predetermined sealing performance without increasing the number of parts.

発明の実施するため最良の形態BEST MODE FOR CARRYING OUT THE INVENTION

以下、本発明の最良の形態を図面を参照して説明する。図１は、ストラット用玉軸受（以下、単に玉軸受という）の片半分を示す断面図である。なお、ストラット式サスペンションの基本的な一般構成は周知であるから、図１では、本発明に関わるストラット式サスペンションの要部の構成のみを示している。   The best mode of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a half of a strut ball bearing (hereinafter simply referred to as a ball bearing). Since the basic general configuration of the strut suspension is well known, FIG. 1 shows only the configuration of the main part of the strut suspension according to the present invention.

同図に示す玉軸受１は、軸方向に対向配置される環状の第１レース２および第２レース３と、両レース２，３間に転動自在に介装された複数個の玉４とを備える。第１、第２レース２，３は、共に、例えばＪＩＳ規格のＳＰＣＣやＳＣＭ等で代表される薄肉鋼板をプレス加工することにより製作される。   A ball bearing 1 shown in FIG. 1 includes an annular first race 2 and second race 3 that are arranged opposite to each other in the axial direction, and a plurality of balls 4 that are rotatably interposed between both races 2 and 3. Is provided. Both the first and second races 2 and 3 are manufactured by pressing a thin steel plate represented by, for example, JIS standard SPCC or SCM.

第１レース２は、回転軸線１１に対して径方向外方に延びる環状部２１と、該環状部２１の外径側から、玉４の軌道面として所定の曲率で軸方向一方（図１の下方）に向けて湾曲する湾曲部２２と、湾曲部２２からさらに軸方向一方に延びる円筒部２３と、円筒部２３からさらに拡径しながら軸方向一方に延びる延長部（湾曲部）２４とを備える。   The first race 2 has an annular portion 21 extending radially outward with respect to the rotation axis 11, and an axial one side with a predetermined curvature as a raceway surface of the balls 4 from the outer diameter side of the annular portion 21 (in FIG. 1). A bending portion 22 that is curved toward the lower side, a cylindrical portion 23 that extends further in the axial direction from the bending portion 22, and an extension portion (curving portion) 24 that extends in the axial direction while further expanding the diameter from the cylindrical portion 23. Prepare.

第２レース３は、第１レース２の環状部２１よりも若干径方向外方にずれた位置から径方向に延びる環状部３１と、該環状部３１の内径側に、玉４の軌道面として所定の曲率で軸方向他方（図１の上方）に向けて湾曲する湾曲部３２と、湾曲部３２からさらに径方向内向きに短く延びる環状部３３と、環状部３３からさらに軸方向他方に短く延びる円筒部３４と、環状部３１の外径端に、軸方向他方に向けて僅かに屈曲する屈曲部３５とを備える。   The second race 3 has an annular portion 31 extending in a radial direction from a position slightly shifted outward in the radial direction from the annular portion 21 of the first race 2, and a raceway surface of the ball 4 on the inner diameter side of the annular portion 31. A curved portion 32 that curves toward the other axial direction (upward in FIG. 1) with a predetermined curvature, an annular portion 33 that extends further inward in the radial direction from the curved portion 32, and a shorter axially other portion from the annular portion 33. A cylindrical portion 34 that extends and a bent portion 35 that is slightly bent toward the other side in the axial direction are provided at the outer diameter end of the annular portion 31.

玉４は、第１レース２の湾曲部２２の内周面と、第２レース３の湾曲部３２の外周面とをそれぞれ軌道面とし、第１レース２と第２レース３とに対し斜めに接触する状態になっている。具体的に、玉４の作用線１０は、図１に対して、第１レース２を上側に、第２レース３を下側に配置した状態で、上から下へ向かうに従い回転軸線１１に近づくように傾いている。   The ball 4 has an inner circumferential surface of the curved portion 22 of the first race 2 and an outer circumferential surface of the curved portion 32 of the second race 3, respectively, and is inclined with respect to the first race 2 and the second race 3. You are in contact. Specifically, the action line 10 of the ball 4 approaches the rotation axis 11 as it goes from top to bottom with the first race 2 on the upper side and the second race 3 on the lower side with respect to FIG. Tilted like that.

そして、第１レース２の円筒部２３の内周面を第２レース３の屈曲部３５の外周面に微小なすきまを介して径方向で対向させるとともに、当該延長部２４の内周面に、第２レース３の屈曲部３５の外周面に接触するラジアルシールリップ２５を被着している。第１レース２の環状部２１の径方向内側の内周面と、第２レース３の円筒部３４の軸方向他方側端面とを微小なすきまを介して軸方向で対向させたうえで、第２レース３の円筒部３４の軸方向他方側端面に、第１レース２の環状部２１の内周面に接触する二つのアキシアルシールリップ３６，３７を被着している。これらシールリップ２５，３６，３７により玉４の配置空間である両レース２，３内部を外部から密封し、この密封空間内に図示しないグリース等の潤滑剤を封入している。ラジアルシールリップ２５の内径寸法は第２レース３の環状部３１の外径寸法よりも小さくなっており、これによって両レース２，３は非分離となっている。シールリップ２５，３６，３７は、例えばゴムや合成樹脂等の公知の材料で構成されており、それぞれ両レース２，３に加硫接着あるいは適宜の接着剤にて被着されている。   Then, the inner peripheral surface of the cylindrical portion 23 of the first race 2 is opposed to the outer peripheral surface of the bent portion 35 of the second race 3 in the radial direction through a minute gap, and the inner peripheral surface of the extension portion 24 is A radial seal lip 25 that contacts the outer peripheral surface of the bent portion 35 of the second race 3 is attached. The inner peripheral surface on the radially inner side of the annular portion 21 of the first race 2 and the other end surface in the axial direction of the cylindrical portion 34 of the second race 3 are opposed to each other in the axial direction through a minute gap. Two axial seal lips 36 and 37 that are in contact with the inner peripheral surface of the annular portion 21 of the first race 2 are attached to the other end surface in the axial direction of the cylindrical portion 34 of the two races 3. The seal lips 25, 36, and 37 seal the inside of the races 2 and 3 as the space for disposing the balls 4 from the outside, and a lubricant such as grease (not shown) is sealed in the sealed space. The inner diameter dimension of the radial seal lip 25 is smaller than the outer diameter dimension of the annular portion 31 of the second race 3, whereby the races 2 and 3 are not separated. The seal lips 25, 36, and 37 are made of a known material such as rubber or synthetic resin, and are attached to both races 2 and 3 by vulcanization adhesion or an appropriate adhesive, respectively.

以上の構成を備えた玉軸受１は、第１レース２を上側に、第２レース３を下側に配置した状態で、ストラットインシュレータ６とコイルスプリング７の上端を受けるスプリングアッパシート８との間に配置される。ストラットインシュレータ６やスプリングアッパシート８が環状受け部材の一例である。   The ball bearing 1 having the above-described configuration is provided between the strut insulator 6 and the spring upper seat 8 that receives the upper end of the coil spring 7 with the first race 2 on the upper side and the second race 3 on the lower side. Placed in. The strut insulator 6 and the spring upper sheet 8 are examples of the annular receiving member.

ストラットインシュレータ６は、径方向に延びる環状部６１と、該環状部６１の外径側から軸方向下向きに延びる外筒部６２とを備え、環状部６１と外筒部６２との間に湾曲部６３が形成されている。そして、第１レース２の環状部２１とストラットインシュレータ６の環状部６１とが当接し、第１レース２の円筒部２３とストラットインシュレータ６の外筒部６２とが当接し、第１レース２の湾曲部２２とストラットインシュレータ６の湾曲部６３との間にすきまが形成されている。   The strut insulator 6 includes an annular portion 61 that extends in the radial direction, and an outer cylinder portion 62 that extends downward in the axial direction from the outer diameter side of the annular portion 61, and a curved portion is provided between the annular portion 61 and the outer cylinder portion 62. 63 is formed. Then, the annular portion 21 of the first race 2 and the annular portion 61 of the strut insulator 6 come into contact with each other, the cylindrical portion 23 of the first race 2 and the outer tubular portion 62 of the strut insulator 6 come into contact with each other, and A clearance is formed between the bending portion 22 and the bending portion 63 of the strut insulator 6.

スプリングアッパシート８は、径方向に延びる環状部８１と、該環状部８１の内径側から軸方向上向きに延びる内筒部８２と、環状部８１の外径側からストラットインシュレータ６の外筒部６２の内周端と軸方向に略一致する位置で軸方向下向きに延びる外筒部８３とを備えるとともに、環状部８１と外筒部８３との間に湾曲コーナー部８４が、環状部８１と内筒部８２との間に湾曲部８５が形成されている。スプリングアッパシート８の環状部８１の内周面と外筒部８３の内周面とにコイルスプリング７の上端部分が当接されている。この場合、湾曲コーナー部８４の内周面とコイルスプリング７の上端部分との間に若干のすきまが存在する。そして、第２レース３の円筒部３４とスプリングアッパシート８の内筒部８２とが当接し、第２レース３の環状部３１とスプリングアッパシート８の環状部８１とが当接し、第２レース３の湾曲部３２とスプリングアッパシート８の湾曲部８５との間にすきまが形成されている。   The spring upper sheet 8 includes an annular portion 81 extending in the radial direction, an inner cylindrical portion 82 extending axially upward from the inner diameter side of the annular portion 81, and an outer cylindrical portion 62 of the strut insulator 6 from the outer radial side of the annular portion 81. And an outer cylindrical portion 83 extending downward in the axial direction at a position substantially coinciding with the axial direction, and a curved corner portion 84 is formed between the annular portion 81 and the outer cylindrical portion 83. A curved portion 85 is formed between the cylindrical portion 82. The upper end portion of the coil spring 7 is in contact with the inner peripheral surface of the annular portion 81 of the spring upper sheet 8 and the inner peripheral surface of the outer cylindrical portion 83. In this case, a slight clearance exists between the inner peripheral surface of the curved corner portion 84 and the upper end portion of the coil spring 7. Then, the cylindrical portion 34 of the second race 3 and the inner cylindrical portion 82 of the spring upper seat 8 are in contact with each other, and the annular portion 31 of the second race 3 and the annular portion 81 of the spring upper seat 8 are in contact with each other. A clearance is formed between the third curved portion 32 and the curved portion 85 of the spring upper sheet 8.

以上の構成において、第１レース２の延長部２４は、ストラットインシュレータ６の外径側である外筒部６２の内周縁とスプリングアッパシート８の外径側である湾曲コーナー部８４との対向すきまから外部に延長され、その湾曲コーナー部８４から外筒部８３の端縁側にいたる領域の外周面に、微小なすきま８６を介して略平行に対向している。このすきま８６は、ラビリンスシール（非接触密封部）となっている。この結果、上記構成では、部品点数を増やすこともなく、玉軸受１の外径側に上記ラジアルシールリップ２５による接触密封部に加えて、すきま８６による非接触密封部とで多段の密封構造が形成されることとなり、泥水や粉塵などに対する密封性がきわめて高くなっている。したがって、玉軸受１の内部に封入される潤滑剤の劣化を長期にわたって防止できると共に、転がり特性ならびに寿命が向上し、ストラット式サスペンションの玉軸受としてその信頼性の向上に大きく貢献できる。
（他の形態）
図２を参照して、本発明の他の形態を説明すると、コイルスプリング７の上端部分の外径寸法が大きい場合には、スプリングアッパシート８の環状部８１を径方向外向きに延ばすように大径化する必要がある。この場合、ストラットインシュレータ６の外筒部６２の内周端よりもスプリングアッパシート８の環状部８１が径方向外方に延びている。この形態では、スプリングアッパシート８の環状部８１の外周面にあわせて、第１レース２の延長部２４を径方向外向きに延ばした形状とし、スプリングアッパシート８の環状部８１の外周面に軸方向に微小なすきま８７を介して略平行に対向させることができる。この場合も、接触密封部であるラジアルシールリップ２５に加えて、さらに外径側にすきま８７によるラビリンスシール（非接触密封部）が形成されるから、図１の形態と同様にその密封性をきわめて高くすることができる。 In the above configuration, the extension part 24 of the first race 2 is a gap between the inner peripheral edge of the outer cylindrical part 62 that is the outer diameter side of the strut insulator 6 and the curved corner part 84 that is the outer diameter side of the spring upper seat 8. The outer peripheral surface of the region extending from the curved corner portion 84 to the outer edge portion of the outer cylinder portion 83 is opposed substantially in parallel via a minute gap 86. The clearance 86 is a labyrinth seal (non-contact sealing portion). As a result, in the above configuration, the multi-stage sealing structure is not formed by increasing the number of parts, and the non-contact sealing portion by the clearance 86 in addition to the contact sealing portion by the radial seal lip 25 on the outer diameter side of the ball bearing 1. As a result, the sealing performance against muddy water and dust is extremely high. Therefore, deterioration of the lubricant enclosed in the ball bearing 1 can be prevented over a long period of time, and the rolling characteristics and life are improved, which can greatly contribute to the improvement of the reliability of the ball bearing of the strut suspension.
(Other forms)
With reference to FIG. 2, another embodiment of the present invention will be described. When the outer diameter of the upper end portion of the coil spring 7 is large, the annular portion 81 of the spring upper seat 8 is extended radially outward. It is necessary to increase the diameter. In this case, the annular portion 81 of the spring upper seat 8 extends radially outward from the inner peripheral end of the outer cylindrical portion 62 of the strut insulator 6. In this embodiment, the extended portion 24 of the first race 2 is extended radially outward in accordance with the outer peripheral surface of the annular portion 81 of the spring upper seat 8, and is formed on the outer peripheral surface of the annular portion 81 of the spring upper seat 8. It can be made to oppose substantially parallel through the small clearance 87 to an axial direction. Also in this case, in addition to the radial seal lip 25 which is a contact sealing portion, a labyrinth seal (non-contact sealing portion) by a gap 87 is further formed on the outer diameter side. Can be very high.

上記各形態の玉軸受１は、アンギュラタイプだけでなく、作用線を径方向に沿わせるラジアルタイプや、軸方向に沿わせるスラストタイプにも適用できる。   The ball bearings 1 of the above embodiments can be applied not only to the angular type, but also to a radial type in which the action line extends along the radial direction and a thrust type along the axial direction.

なお、図１や図２に示す実施の形態において、シールリップ２５，３６，３７を無くした構成や、シールリップ２５またはシールリップ３６，３７のいずれか一方を無くした構成も本発明に含まれる。   In the embodiment shown in FIGS. 1 and 2, the present invention includes a configuration in which the seal lips 25, 36, and 37 are eliminated, and a configuration in which either the seal lip 25 or the seal lips 36 and 37 are eliminated. .

本発明の最良の形態に係るストラット用玉軸受の片半分を示す断面図Sectional drawing which shows the half half of the ball bearing for struts concerning the best form of this invention 本発明の他の形態に係るストラット用玉軸受の片半分を示す断面図Sectional drawing which shows the half of the ball bearing for struts concerning the other form of this invention

符号の説明Explanation of symbols

１…玉軸受、２…第１レース、３…第２レース、４…玉、２４…第１レースの延長部、２５…シールリップ、８…スプリングアッパシート、８３…外筒部。   DESCRIPTION OF SYMBOLS 1 ... Ball bearing, 2 ... 1st race, 3 ... 2nd race, 4 ... Ball, 24 ... Extension part of 1st race, 25 ... Seal lip, 8 ... Spring upper sheet | seat, 83 ... Outer cylinder part.

Claims (3)

ストラットインシュレータとスプリングアッパシートとの外径側対向間に配置されるストラット用玉軸受であって、
ストラットインシュレータ側に配置される環状の第１レースと、
スプリングアッパシート側に配置される環状の第２レースと、
上記両レース間に転動自在に介装される複数個の玉とを備え、
上記第１レースの外径側を、ストラットインシュレータとスプリングアッパシートとの外径側の対向すきまを介して当該すきまの外側にまで拡径しながら延長させた延長部とし、その延長部を、スプリングアッパシートとの対向すきまによりラビリンスシール構造の非密封部を構成するものとした、ことを特徴とするストラット用玉軸受。 A strut ball bearing disposed between the strut insulator and the spring upper seat facing the outer diameter side,
An annular first race disposed on the strut insulator side;
An annular second race disposed on the spring upper seat side;
A plurality of balls interposed between the races so as to roll freely,
The outer diameter side of the first race is an extension portion that is extended to the outside of the clearance through the opposing clearance on the outer diameter side of the strut insulator and the spring upper seat, and the extension portion is a spring. A strut ball bearing characterized in that a non-sealing portion of a labyrinth seal structure is constituted by a clearance facing an upper sheet. 上記延長部は、拡径しながら軸方向一方に延びる延長部となっていて、上記スプリングアッパシートの外径側で軸方向下向きに延びる外筒部との間に微小なすきまを介して略平行に対向していることを特徴とする請求項１に記載のストラット用玉軸受。The extension portion is an extension portion that extends in one axial direction while expanding the diameter, and is substantially parallel to the outer cylinder portion that extends downward in the axial direction on the outer diameter side of the spring upper seat via a small clearance. The ball bearing for struts according to claim 1, wherein 上記両レースの内外径側に、互いの相手となるレースに接触して接触密封部を作るシールリップを設けたことを特徴とする請求項１または２のいずれかに記載のストラット用玉軸受。 The inside and outside diameter of the races, the struts for ball bearings according to claim 1 or 2, characterized in that a seal lip making sealing contact portion in contact with the race as the mutual counterpart.
JP2004102938A 2004-03-31 2004-03-31 Strut ball bearing Expired - Lifetime JP4385823B2 (en)

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JP4748050B2 (en) * 2006-12-18 2011-08-17 株式会社ジェイテクト Sealed thrust ball bearing
JP5233370B2 (en) 2008-04-02 2013-07-10 オイレス工業株式会社 Thrust sliding bearing
JP5245508B2 (en) * 2008-04-18 2013-07-24 オイレス工業株式会社 Thrust sliding bearing
DE102008029018B4 (en) 2008-06-18 2022-05-12 Schaeffler Technologies AG & Co. KG strut bearing
JP5614438B2 (en) * 2012-10-22 2014-10-29 オイレス工業株式会社 Thrust sliding bearing

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