JP2005233304A - Ball bearing for strut - Google Patents

Ball bearing for strut Download PDF

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Publication number
JP2005233304A
JP2005233304A JP2004042985A JP2004042985A JP2005233304A JP 2005233304 A JP2005233304 A JP 2005233304A JP 2004042985 A JP2004042985 A JP 2004042985A JP 2004042985 A JP2004042985 A JP 2004042985A JP 2005233304 A JP2005233304 A JP 2005233304A
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Japan
Prior art keywords
race
ball bearing
strut
races
annular wall
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JP2004042985A
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Japanese (ja)
Inventor
Hiroshi Yano
広 矢野
Yoshiaki Masuda
善紀 増田
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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Priority to JP2004042985A priority Critical patent/JP2005233304A/en
Publication of JP2005233304A publication Critical patent/JP2005233304A/en
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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
    • 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
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/761—Sealings of ball or roller bearings specifically for bearings with purely axial load
    • 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)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ball bearing 1 for a strut structured so that at least one of the races 3 is formed with thin wall and equipped with a raceway surface having a sufficient mechanical strength, capable of reducing the material cost and facilitating the processing. <P>SOLUTION: The ball bearing 1 for the strut is structured so that a plurality of balls 4 are interposed between two races 2 and 3, wherein at least one race 3 is yielded as a press working product, and a double folded part 34 is provided on the race 3, and one surface of the double folded part 34 is allowed to serve as raceway surface for the balls 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

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られるストラット用玉軸受に関する。   The present invention relates to a strut ball bearing used, for example, in a strut suspension of a vehicle.

ストラット用玉軸受は、ストラット式サスペンションの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の間に複数個の玉を介装した構成である。両レースの端部は、互いに微小隙間を介して対向するように屈曲されており、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が被着されている（例えば特許文献１参照）。レースの軌道面に十分な機械的強度を持たせるためには、レースを厚肉とする必要があるので、材料コストが高くなるとともにプレスによる加工が難しくなる。
特開平７−７７２２０号 The strut ball bearing is incorporated between a strut insulator of a strut suspension and a spring upper seat. This ball bearing for struts has a configuration in which a plurality of balls are interposed between two races formed by press-forming a thin steel plate. The ends of both races are bent so as to face each other through a minute gap, and seal lips that contact the other side are attached to the ends of both races (see, for example, Patent Document 1). In order to give sufficient race strength to the raceway surface, it is necessary to make the race thicker, which increases the material cost and makes it difficult to work with a press.
JP-A-7-77220

本発明は、ストラット用玉軸受に備える少なくとも一つのレースについて薄肉としたうえで十分な機械的強度を有する軌道面を備えた構成とし、材料コストを低減するとともに、加工容易化を図ることを課題としている。   An object of the present invention is to provide a structure including a raceway surface having sufficient mechanical strength after thinning at least one race provided in a ball bearing for struts, and to reduce material cost and facilitate processing. It is said.

本発明は、二つのレースの間に複数個の玉を介装してなるストラット用玉軸受であって、少なくともいずれか一方のレースをプレス成形品とするとともに、該一方のレースに二重に折り重ねた折り重ね部を設け、この折り重ね部の片面を玉の軌道面としたことを特徴としている。   The present invention is a strut ball bearing in which a plurality of balls are interposed between two races, and at least one of the races is a press-formed product, and the one race is doubled. A folded portion is provided, and one surface of the folded portion is used as a ball raceway surface.

本発明によると、一方のレースにおける玉の軌道面として十分な機械的強度を確保することができ、一方のレースの母材としては安価な薄肉鋼板を用いることができる。そのため、レースの材料コストを低減できるとともに、プレスによる加工が容易となり、好ましい。   According to the present invention, sufficient mechanical strength can be ensured as a ball raceway surface in one race, and an inexpensive thin steel plate can be used as a base material for one race. Therefore, the material cost of the race can be reduced, and processing by a press becomes easy, which is preferable.

好ましくは、上記両レースは、互いに軸方向に対向する環状壁部を有し、一方の環状壁部の外径側および他方の環状壁部の内径側に、互いに対向する円錐部を設け、一方の円錐部を上記折り重ね部とすることができる。また、好ましくは、上記一方のレースの折り重ね部および他方のレースの所定部位のうちの一方に他方に接触するシールリップを被着することができる。さらに、好ましくは、上記一方のレースの折り重ね部を他方のレースの所定部位に微小すきまを介して対向配置させて非接触密封部を作ることができる。このように、微小すきまによる非接触密封部とシールリップによる接触密封部とで多段の密封構造とした場合、密封性が向上する。   Preferably, both the races have annular wall portions facing each other in the axial direction, and provided with conical portions facing each other on the outer diameter side of one annular wall portion and the inner diameter side of the other annular wall portion, The conical portion can be the folded portion. Preferably, a seal lip contacting the other can be attached to one of the folded portion of the one race and a predetermined portion of the other race. Furthermore, it is preferable that the non-contact sealing portion can be formed by disposing the folded portion of the one race to a predetermined portion of the other race via a minute gap. As described above, when the multi-stage sealing structure is formed by the non-contact sealing portion by the minute gap and the contact sealing portion by the seal lip, the sealing performance is improved.

上記一方のレースに、ストラット式サスペンションのコイルスプリングを受ける受け部を設けることができる。この場合、ストラット式サスペンションのコイルスプリングを受けるスプリングアッパシートが不要になるから、ストラット式サスペンションの部品点数を削減でき、装置コストの低減に貢献できる。   The one race can be provided with a receiving portion for receiving the coil spring of the strut suspension. In this case, since the spring upper seat for receiving the coil spring of the strut suspension is not necessary, the number of parts of the strut suspension can be reduced, and the device cost can be reduced.

本発明によれば、ストラット用玉軸受に備える少なくとも一つのレースについて薄肉としたうえで十分な機械的強度を有する軌道面を備えた構成とすることができ、製造コストの低減に貢献できる。   According to the present invention, at least one race provided in the strut ball bearing can be made thin, and can be provided with a raceway surface having sufficient mechanical strength, which can contribute to a reduction in manufacturing cost.

以下、本発明の最良の実施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の片半分を示す断面図である。図に示すストラット用玉軸受１は、軸方向に対向配置される第１レース２と第２レース３との間に複数個の玉４を介装した構成である。本発明では、第２レース３の形状を工夫しているので、以下で詳しく説明する。   The best mode for carrying out 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. The strut ball bearing 1 shown in the figure has a configuration in which a plurality of balls 4 are interposed between a first race 2 and a second race 3 which are arranged to face each other in the axial direction. In the present invention, the shape of the second race 3 is devised, and will be described in detail below.

両レース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。   Both 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、径方向に沿う環状壁部２１の内径側に軸方向一方に伸びる円筒部２２を設け、環状壁部２１の外径側に円錐部２３を設けた形状である。   The first race 2 has a shape in which a cylindrical portion 22 extending in the axial direction is provided on the inner diameter side of the annular wall portion 21 along the radial direction, and a conical portion 23 is provided on the outer diameter side of the annular wall portion 21.

第２レース３は、径方向に沿う環状壁部３１の内径側に軸方向一方に伸びる円筒部３２を設けた形状であり、環状壁部３１の外径側には軸方向に僅かに段付きとされた径方向外向きの延長部３３が設けられ、環状壁部３１と円筒部３２との連接部分には上半分の断面が略Ｕ字形となるように二重に折り重ねられた折り重ね部３４が設けられている。折り重ね部３４は、第１レース２の円錐部２３に対向するように環状壁部３１に対し斜めに形成されている。この折り重ね部３４が請求項に記載の片方の円錐部に対応する。   The second race 3 has a shape in which a cylindrical portion 32 extending in one axial direction is provided on the inner diameter side of the annular wall portion 31 along the radial direction, and the outer diameter side of the annular wall portion 31 is slightly stepped in the axial direction. A radially outwardly extending extension 33 is provided, and the connecting portion between the annular wall portion 31 and the cylindrical portion 32 is double-folded so that the upper half section is substantially U-shaped. A portion 34 is provided. The folded portion 34 is formed obliquely with respect to the annular wall portion 31 so as to face the conical portion 23 of the first race 2. The folded portion 34 corresponds to one of the conical portions described in the claims.

玉４は、第１レース２における環状壁部２１から円錐部２３への湾曲連接部分の内径側の面と、第２レース３における環状壁部３１から折り重ね部３４への湾曲連接部分の外径側の面とを軌道面とし、玉４が第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に示すように、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 diameter side surface of the curved connecting portion from the annular wall portion 21 to the conical portion 23 in the first race 2 and an outer portion of the curved connecting portion from the annular wall portion 31 to the folded portion 34 in the second race 3. The surface on the radial side is a raceway surface, and the balls 4 are in contact with the first race 2 and the second race 3 obliquely. Specifically, as shown in FIG. 1, the action line 10 of the ball 4 has a rotational axis 11 as it goes from top to bottom in a state where the first race 2 is disposed on the upper side and the second race 3 is disposed on the lower side. Tilt to approach.

そして、第１レース２の円筒部２２の自由端側外周面を、第２レース３の折り重ね部３４の内周面に微小すきまを介して径方向に対向させて非接触密封部を作ったうえで、第１レース２の円筒部２２の自由端に、第２レース３の折り重ね部３４の内周面に軸方向から接触するラジアルタイプのシールリップ２４を被着している。また、第１レース２の円錐部２３の外周縁を、第２レース３の環状壁部３１の内側面に微小すきまを介して軸方向に対向させて非接触密封部を作ったうえで、第１レース２の円錐部２３の外周縁に、第２レース３の環状壁部３１の内側面に径方向から接触するアキシアルタイプのシールリップ２５を被着している。両シールリップ２４，２５により玉４の配置空間を外部から密封し、この密封空間内に図示していないがグリース等の潤滑剤を封入するようにしている。しかも、ラジアルタイプのシールリップ２４の外径サイズを折り重ね部３４の内径サイズよりも大きくすることによって二つのレース２，３を非分離とするようになっている。なお、両シールリップ２４，２５は、例えばゴムや合成樹脂等の公知の材料からなり、第１レース２に加硫接着あるいは接着剤にて被着される。   And the non-contact sealing part was made by making the free end side outer peripheral surface of the cylindrical portion 22 of the first race 2 face the inner peripheral surface of the folded portion 34 of the second race 3 in the radial direction via a minute gap. In addition, a radial type seal lip 24 is attached to the free end of the cylindrical portion 22 of the first race 2 in contact with the inner peripheral surface of the folded portion 34 of the second race 3 from the axial direction. Further, the outer peripheral edge of the conical portion 23 of the first race 2 is made to face the inner surface of the annular wall portion 31 of the second race 3 in the axial direction through a minute gap, thereby forming a non-contact sealing portion. An axial type seal lip 25 is attached to the outer peripheral edge of the conical portion 23 of one race 2 so as to contact the inner surface of the annular wall portion 31 of the second race 3 from the radial direction. The space in which the balls 4 are arranged is sealed from the outside by both the seal lips 24, 25, and a lubricant such as grease is enclosed in the sealed space, although not shown. Moreover, the two races 2 and 3 are not separated by making the outer diameter size of the radial type seal lip 24 larger than the inner diameter size of the folded portion 34. Both the seal lips 24 and 25 are made of a known material such as rubber or synthetic resin, and are attached to the first race 2 by vulcanization adhesion or adhesive.

ところで、この実施形態のストラット用玉軸受１は、例えば第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、ストラット式サスペンションのストラットインシュレータ６の下側に配置されるとともに、第２レース３がストラット式サスペンションのコイルスプリング７の上端を受けるスプリングアッパシートを兼ねたものとされている。   By the way, the strut ball bearing 1 of this embodiment is disposed below the strut insulator 6 of the strut suspension, for example, with the first race 2 on the upper side and the second race 3 on the lower side. The second race 3 also serves as a spring upper seat that receives the upper end of the coil spring 7 of the strut suspension.

コイルスプリング７の上端部分は、第２レース３の環状壁部３１の外側面と円筒部３２の外周面とに当接されている。つまり、第２レース３の環状壁部３１および円筒部３２がコイルスプリング７の受け部とされている。   The upper end portion of the coil spring 7 is in contact with the outer surface of the annular wall portion 31 of the second race 3 and the outer peripheral surface of the cylindrical portion 32. That is, the annular wall portion 31 and the cylindrical portion 32 of the second race 3 are used as receiving portions for the coil spring 7.

以上説明したように、第２レース３において金属板を二重に折り重ねてなる折り重ね部３４を玉４の軌道面としているので、第２レース３における玉４の軌道面として十分な機械的強度を確保することができ、第２レース３の母材として安価な薄肉鋼板を用いることができる。そのため、第２レース３の材料コストを低減できるとともに、プレスによる加工が容易となる。特に、この実施形態のように、第２レース３をストラット式サスペンションのコイルスプリング７を受けるスプリングアッパシートとして兼用させるようにしていれば、ストラット式サスペンションのスプリングアッパシートが不要になるので、部品点数を削減でき、装置コストの低減に貢献できる。   As described above, the folded portion 34 formed by double folding the metal plate in the second race 3 is used as the raceway surface of the ball 4, and therefore sufficient mechanical as the raceway surface of the ball 4 in the second race 3. Strength can be ensured, and an inexpensive thin steel plate can be used as the base material of the second race 3. Therefore, the material cost of the second race 3 can be reduced, and processing by a press becomes easy. In particular, if the second race 3 is also used as a spring upper seat for receiving the coil spring 7 of the strut suspension as in this embodiment, the spring upper seat of the strut suspension is not necessary, so the number of parts is reduced. And can contribute to the reduction of the device cost.

以下、本発明の他の実施形態を説明する。   Hereinafter, other embodiments of the present invention will be described.

（１）図２に示すように、第２レース３の円筒部３２において折り重ね部３４よりも先の部分を無くすことができる。この例では、コイルスプリング７の上端部分を、第２レース３の延長部３３の外側面に当接させるようにしており、この延長部３３がコイルスプリング７の受け部とされている。   (1) As shown in FIG. 2, the cylindrical part 32 of the second race 3 can be eliminated from the folded part 34. In this example, the upper end portion of the coil spring 7 is brought into contact with the outer surface of the extension portion 33 of the second race 3, and the extension portion 33 serves as a receiving portion of the coil spring 7.

（２）図３に示すように、第２レース３の折り重ね部３４の屈曲中心部分の内周面に、第１レース２の円筒部２２の外周面に径方向から接触するシールリップ３５を設けることができる。   (2) As shown in FIG. 3, a seal lip 35 that is in radial contact with the outer peripheral surface of the cylindrical portion 22 of the first race 2 is formed on the inner peripheral surface of the bent central portion of the folded portion 34 of the second race 3. Can be provided.

（３）また、第２レース３はストラット式サスペンションのスプリングアッパシートを兼用しない構造としたものも本発明に含まれる。   (3) The second race 3 includes a structure in which the spring upper seat of the strut suspension is not used.

（４）第１レース２に第２レース３のような折り重ね部３４を設けることができる。この場合、第１レース２の材料コストを削減できるとともに加工が容易になるという効果が得られる。要するに、第１レース２および第２レース３の少なくともいずれか一方に折り重ね部を設けたものが本発明に含まれる。   (4) The first race 2 can be provided with a folded portion 34 like the second race 3. In this case, the material cost of the first race 2 can be reduced and the processing can be easily performed. In short, the present invention includes those in which a folded portion is provided in at least one of the first race 2 and the second race 3.

（５）上記実施形態のストラット用玉軸受１は、アンギュラタイプであったが、これに限定されるものではなく、作用線を径方向に沿わせるようなラジアルタイプにしたり、軸方向に沿わせるようなスラストタイプとすることができる。   (5) Although the ball bearing 1 for struts of the said embodiment was an angular type, it is not limited to this, It is made into the radial type which makes a working line run along a radial direction, or it makes it run along an axial direction. Such a thrust type can be used.

本発明の最良の実施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 embodiment of this invention 本発明の他の実施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 other embodiment of this invention. 本発明の他の実施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 other embodiment of this invention.

符号の説明Explanation of symbols

１…ストラット用玉軸受、２…第１レース、３…第２レース、４…玉、２１…第１レースの環状壁部、２２…第１レースの円筒部、２３…第１レースの円錐部、３１…第２レースの環状壁部、３２…第２レースの円筒部、３３…第２レースの延長部、３４…第２レースの折り重ね部   DESCRIPTION OF SYMBOLS 1 ... Ball bearing for struts, 2 ... 1st race, 3 ... 2nd race, 4 ... ball, 21 ... Ring wall part of 1st race, 22 ... Cylindrical part of 1st race, 23 ... Conical part of 1st race 31 ... An annular wall portion of the second race, 32 ... A cylindrical portion of the second race, 33 ... An extension portion of the second race, 34 ... A folded portion of the second race

Claims (5)

二つのレースの間に複数個の玉を介装してなるストラット用玉軸受であって、
少なくともいずれか一方のレースをプレス成形品とするとともに、該一方のレースに二重に折り重ねた折り重ね部を設け、この折り重ね部の片面を玉の軌道面としたことを特徴とするストラット用玉軸受。 A strut ball bearing in which a plurality of balls are interposed between two races,
A strut characterized in that at least one of the races is a press-molded product, and a folded portion that is double-folded is provided on the one race, and one surface of the folded portion is used as a ball raceway surface. Ball bearing. 上記両レースは、互いに軸方向に対向する環状壁部を有し、一方の環状壁部の外径側および他方の環状壁部の内径側に、互いに対向する円錐部を設け、一方の円錐部を上記折り重ね部とした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 races have annular wall portions that are axially opposed to each other, and conical portions that are opposed to each other are provided on the outer diameter side of one annular wall portion and the inner diameter side of the other annular wall portion. The ball bearing for struts according to claim 1, wherein the folded portion is used as the folded portion. 上記一方のレースの折り重ね部および他方のレースの所定部位のうちの一方に他方に接触するシールリップを被着していることを特徴とする請求項１または２に記載のストラット用玉軸受。   3. The strut ball bearing according to claim 1, wherein a seal lip that contacts the other is attached to one of the folded portion of the one race and a predetermined portion of the other race. 上記一方のレースの折り重ね部を他方のレースの所定部位に微小すきまを介して対向配置させて非接触密封部を作っていることを特徴とする請求項１〜３のいずれかに記載のストラット用玉軸受。   The strut according to any one of claims 1 to 3, wherein a non-contact sealing portion is formed by disposing the folded portion of the one race oppositely to a predetermined portion of the other race via a minute gap. Ball bearing. 上記一方のレースに、ストラット式サスペンションのコイルスプリングを受ける受け部が設けられていることを特徴とする請求項１〜４のいずれかに記載のストラット用玉軸受。   The ball bearing for struts according to any one of claims 1 to 4, wherein said one race is provided with a receiving portion for receiving a coil spring of a strut suspension.
JP2004042985A 2004-02-19 2004-02-19 Ball bearing for strut Pending JP2005233304A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11953096B2 (en) * 2022-04-18 2024-04-09 Schaeffler Technologies AG & Co. KG Strut bearing assembly with metal guide ring and spring seat

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11953096B2 (en) * 2022-04-18 2024-04-09 Schaeffler Technologies AG & Co. KG Strut bearing assembly with metal guide ring and spring seat

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