JPS60237217A - Spindle unit - Google Patents
Spindle unitInfo
- Publication number
- JPS60237217A JPS60237217A JP9434684A JP9434684A JPS60237217A JP S60237217 A JPS60237217 A JP S60237217A JP 9434684 A JP9434684 A JP 9434684A JP 9434684 A JP9434684 A JP 9434684A JP S60237217 A JPS60237217 A JP S60237217A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- housing
- spindle unit
- shaft member
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/067—Fixing them in a housing
-
- 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
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明のスピンドルユニットはフロッピーディスク駆
動用のスピンドルユニット等、電子機器の回転部に用い
られるものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The spindle unit of the present invention is used in a rotating part of an electronic device, such as a spindle unit for driving a floppy disk.
（従来の技術）
一般に高精度を要求されるスピンドルユニットにおいで
最も重要なことはハウジングと細部材との間の相対的な
半径方向及び軸方向の遊びをなくすことである。従来、
このスピンドルユニットのハウジングと細部材との間の
遊びをなくする手段としては、米国特許第３，０９７，
８９５号明細書に記載されているような定圧予圧方式に
よる方法、すなわち回転軸とハウジングとの間に２個の
玉軸受をばめとして、該両軸受の互いの外輪の間にコイ
ルばねを着装し、両軸受に対しばねにより軸方向の荷重
（予圧）を付与して前記遊びをなくする方法、あるいは
米国特許第３，３２６，６１３号明細書に記載されてい
るような定位置予圧方式による方法、すなわち前記ばね
の代わりに回転軸に取付けたナツトを締め付けることに
より２個の軸受間に軸方向の荷重（予圧）を付与する方
法が知られている。(Prior Art) Generally speaking, the most important thing in spindle units that require high precision is to eliminate relative radial and axial play between the housing and the detail members. Conventionally,
As a means for eliminating the play between the housing of the spindle unit and the detail material, U.S. Pat. No. 3,097,
A method using a constant pressure preload method as described in the specification of No. 895, that is, two ball bearings are fitted between the rotating shaft and the housing, and a coil spring is installed between the outer rings of both bearings. However, this play can be eliminated by applying an axial load (preload) to both bearings using springs, or by using a fixed position preload method as described in U.S. Pat. No. 3,326,613. A known method is to apply an axial load (preload) between two bearings by tightening a nut attached to a rotating shaft instead of the spring.
（発明の解決しようとする問題点）
しかしながら上記のような従来技術ではそれぞれ軸方向
に遊びのないスピンドルユニットヲ得ることができるが
、半径方向の遊びをなくすることができないという欠点
がある。(Problems to be Solved by the Invention) However, although the above-mentioned conventional techniques can each provide a spindle unit with no play in the axial direction, they have the disadvantage that play in the radial direction cannot be eliminated.
その原因は、軸受に対し軸方向から予圧を与えるという
関係上、予圧量の調整を容易とするためには軸受とハウ
ジングまたは軸部材との開の嵌合部のはめあいをすきま
ばめにして軸受を軸方向に移動可能にしなければならな
いという構造上の制約があり、前記嵌合部のガタが半径
方向の遊びとして現れるためである。そのため上記のよ
うな従来のスピンドルユニットでは２個の軸受の取付間
隔及び軸受の接触角を大きくして軸受の着力点の開隔を
できるだけ長くすることにより、前記嵌合部の〃夕の影
響が半径方向の遊びとして現れないようにしてユニット
を高精度り保っようにしている。The reason for this is that preload is applied to the bearing from the axial direction, and in order to easily adjust the amount of preload, the open fitting part between the bearing and the housing or shaft member must be loosely fitted. This is because there is a structural constraint that the fitting part must be movable in the axial direction, and play in the fitting portion appears as play in the radial direction. Therefore, in the conventional spindle unit as described above, by increasing the installation interval between the two bearings and the contact angle of the bearings to make the distance between the bearing force application points as long as possible, the influence of the interference of the fitting part can be reduced. The unit is kept highly accurate by preventing it from appearing as radial play.
他方、ユニットを高精度に維持することもさることなが
らユニット自体のフンバクト化の問題も機器を小型化す
るためには重要な問題であり、上記従来技術のように取
付間隔を大きくとる形式のスピンドルユニットは小型化
が要求される機器に用いるに難があった。On the other hand, in addition to maintaining the high precision of the unit, the issue of making the unit itself more compact is also an important issue in order to downsize the equipment, and spindles with large mounting intervals, such as the above conventional technology, are important issues. The unit was difficult to use in equipment that required miniaturization.
しかも上記従来技術の場合、取付間隔をできるだけ小さ
くしようとする前記のような方法だけでは半径方向の遊
びをなくすることができなくなりさらに別の方法として
軸受、ハウジング及び軸部材の各部品のそれぞれの嵌合
部のすきまをできるだけ小さくするために、各部品を選
択組合わせしてユニットを組み立てるというような非常
な工数のかかる方法が必要となる。しかしこの方法を用
いたとしても前記嵌合部に軸受が軸方向に移動するだけ
のはめあいすきまは必要であるので半径方向の遊びを完
全にはなくすことはできない。Moreover, in the case of the above-mentioned prior art, the radial play cannot be eliminated only by the above-mentioned method of reducing the mounting interval as much as possible, and another method is to reduce the distance between the bearing, housing, and shaft member. In order to reduce the gap between the fitting parts as much as possible, it is necessary to use a method that requires a large amount of man-hours, such as selecting and combining parts to assemble the unit. However, even if this method is used, it is not possible to completely eliminate play in the radial direction because the fitting portion must have a fitting clearance that allows the bearing to move in the axial direction.
しかも前記従来技術では、２個の軸受を用いるという構
造であるため、ユニットの軸方向の寸法は必然的に２個
の軸受の幅寸法以下には小さくすることはできない。Furthermore, since the conventional technique has a structure in which two bearings are used, the axial dimension of the unit cannot necessarily be made smaller than the width dimension of the two bearings.
この発明は上記従来技術におけるスピンドルユニットの
半径方向の遊びをなくすることかで外ないという問題点
、及びスピンドルユニットを小型化することができない
という問題点を解決するものである。The present invention solves the problem in the prior art that the spindle unit cannot be miniaturized by eliminating the radial play of the spindle unit and the problem that the spindle unit cannot be made smaller.
問題点を解決するための手段
この発明は上記従来技術の問題点を解決するための第１
の手段として、ハウジングと、軸部材と、該両部材の相
対回転を可能とするべく両部材間に配設した玉軸受とか
らなるスピンドルユニットにおいて、前記玉軸受を内外
輪の二つの軌道輪を有するただ１個の軸受とし、該軸受
と前記両部材との一方の配設部を、前記一方の軌道輪と
ハウジング又は軸部材とをしょっばめで嵌合させ軸受の
内部すきまが常に負となるように半径方向から予圧を付
与させる予圧付与部として形成し、かつ他方の配設部を
、前記内外輪の他方の軌道輪とハウジング又は軸部材と
をすきまなく嵌合させたはめあい部として形成するとと
もに、前記予圧付与部もしくははめあい部の少なくとも
いずれが一方に前記予圧の異常な増加を防止する円周方
向に連続する空間部を設けたことを特徴とするスピンド
ルユニットを提供し、かつ第２の手段として、ハウジン
グと、細部材と、該両部材の相対回転を可能とするべく
両部材間に配設した玉軸受とからなるスピンドルユニッ
トにおいて、前記玉軸受を内外輪のいずれか一方のみの
軌道輪を有するただ１個の軸受とし、該軸受と前記両部
材との一方の配設部を、前記軌道輪とハウジング又は軸
部材とをしょっばめで嵌合させ軸受の内部すきまが常に
負となるように半径方向から予圧を付与させる予圧付与
部として形成し、かつ他方の配設部を、ハウジング又は
軸部材に直接軸受の軌道を形成して該軌道に転動体を配
設したハウジング又は軸部材と玉軸受との一体化部分と
して形成するとともに、前記予圧付与部に該予圧の異常
な増加を防止する円周方向に連続する空間部を設けたこ
とを特徴とするスピンドルユニットを提供するものであ
る。Means for Solving the Problems This invention is the first method for solving the problems of the above-mentioned prior art.
As a means for this, in a spindle unit consisting of a housing, a shaft member, and a ball bearing disposed between the two members to enable relative rotation between the two members, the ball bearing is connected to two bearing rings, an inner ring and an inner ring. The bearing ring and the housing or the shaft member are fitted with a tight fit so that the internal clearance of the bearing is always negative. It is formed as a preload applying part that applies preload from the radial direction, and the other disposed part is formed as a fitting part in which the other bearing ring of the inner and outer rings and the housing or the shaft member are fitted without a gap. In addition, there is provided a spindle unit characterized in that at least one of the preload applying part and the fitting part is provided with a circumferentially continuous space part that prevents an abnormal increase in the preload, and a second part. As a means, in a spindle unit consisting of a housing, a detail member, and a ball bearing disposed between both members to enable relative rotation between the two members, the ball bearing is attached to the raceway of only one of the inner and outer rings. Only one bearing having a ring is provided, and the bearing ring and the housing or the shaft member are fitted with a tight fit in one of the mounting portions of the bearing and the two members, so that the internal clearance of the bearing is always negative. A housing or shaft member that is formed as a preload applying part that applies preload from the radial direction, and the other arrangement part is formed as a bearing raceway directly on the housing or shaft member, and rolling elements are arranged on the raceway. The spindle unit is formed as an integrated part of a ball bearing and a ball bearing, and the preload applying part is provided with a circumferentially continuous space part for preventing an abnormal increase in the preload. be.
（作 用） 上記本発明による手段は次のように作用する。(for production) The above means according to the present invention operates as follows.
まず前記予圧付与部として形成した一方の配設部は軌道
輪とハウジング又は軸部材とのしょっばめ嵌合により半
径方向に遊びのない状態となる。First, one of the disposed sections formed as the preload applying section is brought into a state in which there is no play in the radial direction due to tight fitting between the bearing ring and the housing or the shaft member.
そして同時に該嵌合によって前記軌道輪が半径方向に膨
張又は収縮し、この膨張又は収縮が軸受に対して該軸受
の内部すきまを常に負とする半径方向の予圧として作用
し、軸受自体も半径方向に遊びのない状態となる。At the same time, due to the fitting, the bearing ring expands or contracts in the radial direction, and this expansion or contraction acts on the bearing as a radial preload that keeps the internal clearance of the bearing always negative, and the bearing itself also expands or contracts in the radial direction. There will be no play.
さらに前記他方の配設部も、前記第ｌの手段では他方の
軌道輪とハウジング又は軸部材とがすきまなく嵌合し、
また前記第２の手段では軸受とハウジング又は軸部材と
が一体化されて形成されることにより、いずれの場合も
該配設部は半径方向に遊びのない状態となる。Furthermore, in the first means, the other arrangement portion also fits the other bearing ring and the housing or the shaft member without any clearance,
Further, in the second means, the bearing and the housing or the shaft member are integrally formed, so that in either case, there is no play in the radial direction of the disposed portion.
また前記空間部は前記予圧付与部から軸受に対し半径方
向の予圧を付与した際に、軌道輪の膨張又は収縮がこの
空間部内で行われるようにするもので、該軌道輪の膨張
又は収縮がハウジング又は軸部材によって阻害されて軸
受の軌道面と転動体との接触部の面圧（以下この発明で
は内部荷重という）が異常に増加することを防止すると
いう働きをする。Further, the space portion allows the bearing ring to expand or contract within this space when a radial preload is applied to the bearing from the preload applying portion. It functions to prevent the surface pressure (hereinafter referred to as internal load in this invention) at the contact portion between the bearing raceway surface and the rolling elements from increasing abnormally due to interference by the housing or shaft member.
（実 施 例）
第１図にこの発明の第１の実施例を示す。第１図におい
て１はハウシング、２は軸部材、３は軸受である。軸受
３は外輪４、内輪５の二つの軌道輪及び転動体６、保持
器７、シールド板８よりなる深溝形歪軸受であって前記
ハウシング１と軸部材２との間にただ１個配設されてい
る。(Embodiment) FIG. 1 shows a first embodiment of the present invention. In FIG. 1, 1 is a housing, 2 is a shaft member, and 3 is a bearing. The bearing 3 is a deep groove strain bearing consisting of two bearing rings, an outer ring 4 and an inner ring 5, rolling elements 6, a retainer 7, and a shield plate 8, and only one is disposed between the housing 1 and the shaft member 2. has been done.
９はスピンドルユニットと他の部材とを接続するための
７ランノ継手で実施例では圧入によって軸部材２と一体
的に結合され、内輪５の抜は止めを兼ねている。なおこ
の結合手段は圧入以外にもねし止め、接着剤による接着
等、適宜の手段をとればよい。Reference numeral 9 denotes a 7-run joint for connecting the spindle unit and other members, and in the embodiment, it is integrally connected to the shaft member 2 by press fitting, and also serves to prevent the inner ring 5 from being pulled out. In addition to press-fitting, this coupling means may be any other suitable means such as screwing, adhesive bonding, etc.
１０は、ハウジング１と外輪４との嵌合部のハウシング
１側の内周面に、転動体６の中心を通る軸直角平面を中
心として左右はぼ対称に、かつ外輪の軌道幅と略等しい
があるいは若干大きくした溝幅（実施例では若干大きく
している）で外輪の軌道面と対向するようにして形成し
た円周方向に連続する周溝である。10 is provided on the inner circumferential surface of the housing 1 side of the fitting portion between the housing 1 and the outer ring 4, and is approximately symmetrical left and right with respect to a plane perpendicular to the axis passing through the center of the rolling element 6, and is approximately equal to the raceway width of the outer ring. This is a circumferential groove that is continuous in the circumferential direction and is formed so as to face the raceway surface of the outer ring with a groove width that is slightly increased (slightly increased in the embodiment).
この第１の実施例のスピンドルユニットは次のようにし
て組み立てられる。The spindle unit of this first embodiment is assembled as follows.
まず軸受３をあらかしめハウジング１内に組込んでおく
。このとトの軸受３の外輪４とハウジング１との嵌合は
しめじろを与えたはめあいとし該嵌合部をすきまのない
状態としておく。First, the bearing 3 is roughly assembled into the housing 1. At this time, the outer ring 4 of the bearing 3 and the housing 1 are fitted with a tightening margin, and the fitting portion is left in a state with no clearance.
次に軸部材２を軸受３の内輪５に所定の位置まで圧入す
る。すなわち内輪５と軸部材２とのはめあいをしまりぼ
めとし、軸部材２の圧入によって該軸部材２と内輪５と
を所定の位置ですきまなく固ｆするのであるが、このと
き軸部材２の圧入に上って内輪５に半径方向外方への膨
張が生し軸受３の内部すきまが減少し、軸受３は半径方
向の予圧が与えられた状態となる。Next, the shaft member 2 is press-fitted into the inner ring 5 of the bearing 3 to a predetermined position. In other words, the fit between the inner ring 5 and the shaft member 2 is tight, and the shaft member 2 and the inner ring 5 are fixed in a predetermined position by press-fitting the shaft member 2, but at this time, the shaft member 2 is Upon press-fitting, the inner ring 5 expands outward in the radial direction, the internal clearance of the bearing 3 decreases, and the bearing 3 is placed under a radial preload.
この半径方向の予圧量を前記嵌合部でのしめじろを適宜
選定することによって調整し、軸受３にその内部すきま
が常に負の状態となるように半径張によって生しる内部
荷重の増加が外輪４を半径方向外方へ押し広げる力とし
て作用したとき、ハウジング１の剛性のため外輪４の膨
張が阻止され前記外輪を押し広げる力がそのまま軸受の
内部荷重の増加となって該内部荷重の異常な増加を招く
ことを防止するものであって、前記外輪４を押し広げる
力が前記周溝１０を形成した部分以外のハウシング１の
外輪４との嵌合部に作用したとき、ハウシング１の剛性
によって外輪４の膨張が阻止され軸受の内部荷重を増加
させようとするが、この内部荷重の増加分は、前記周溝
１０を外輪４の軌道面と対向する位置に形成しているこ
とにより該周溝１０内で外輪を自由に膨張させる力とし
て働き、この膨張によって軸受内部荷重の増加が吸収さ
れ内周面に形成したか、第２図に示すように外輪４の外
周面に周溝１１として形成してもよく、第３図に示すよ
うに軸部材２の外周面に周溝１２として形成してもよい
。要は軸受３とハウジング１又は軸部材２との嵌合部に
軸受３の転動体６の中心を通る軸部材直角平面を中心と
して左右はぼ対称に、かつ軌道輪の軌道幅と略等しいか
あるいは若干大きくした溝幅で該軌道輪の軌道面と対向
するようにして形成した円周方向に連続する空間部が形
成されていればよい。The amount of preload in the radial direction is adjusted by appropriately selecting the tightening margin at the fitting part, and the increase in internal load caused by the radial tension is adjusted so that the internal clearance of the bearing 3 is always in a negative state. When a force acts to spread the outer ring 4 outward in the radial direction, the rigidity of the housing 1 prevents the expansion of the outer ring 4, and the force that spreads the outer ring directly increases the internal load of the bearing, reducing the internal load. This is to prevent an abnormal increase in the size of the housing 1 when a force that pushes the outer ring 4 apart acts on the fitting portion of the housing 1 with the outer ring 4 other than the portion where the circumferential groove 10 is formed. The rigidity prevents expansion of the outer ring 4 and increases the internal load of the bearing, but this increase in internal load can be avoided by forming the circumferential groove 10 at a position facing the raceway surface of the outer ring 4. This acts as a force to freely expand the outer ring within the circumferential groove 10, and this expansion absorbs the increase in the internal load of the bearing. 11, or as a circumferential groove 12 on the outer peripheral surface of the shaft member 2, as shown in FIG. In short, the fitting part between the bearing 3 and the housing 1 or the shaft member 2 should be approximately symmetrical left and right with respect to a plane perpendicular to the shaft member passing through the center of the rolling elements 6 of the bearing 3, and approximately equal to the raceway width of the bearing ring. Alternatively, a space portion may be formed which is continuous in the circumferential direction and is formed so as to face the raceway surface of the raceway ring with a slightly increased groove width.
軸受３の固定をより強固なものにするためにハウシング
１と軸受３の外輪４との嵌合部のしめしろをさらに大き
くする場合には、軸受３の内部荷重もかなり大ぎなもの
となるので第４図に示すように、軸部材２の外周面とハ
ウジング１の内周面との両方に周溝１４及び周溝１３を
形成するかあるいは第５図に示すようにハウジング１の
内周面と外輪４の外周面とに周溝１５．１６を形成する
とよい。If the interference between the housing 1 and the outer ring 4 of the bearing 3 is increased further in order to secure the bearing 3 more firmly, the internal load of the bearing 3 will also become considerably large. As shown in FIG. 4, a circumferential groove 14 and a circumferential groove 13 are formed on both the outer circumferential surface of the shaft member 2 and the inner circumferential surface of the housing 1, or as shown in FIG. It is preferable to form circumferential grooves 15 and 16 on the outer peripheral surface of the outer ring 4.
また前記実施例はいずれも内輪５を軸部材２に圧入して
軸受３に半径方向の予圧を与えるものであるが、外輪４
をハウジング１に圧入して半径方向の予圧を与えるよう
にしてもよい。Further, in each of the above embodiments, the inner ring 5 is press-fitted into the shaft member 2 to apply a radial preload to the bearing 3, but the outer ring 4
may be press-fitted into the housing 1 to apply a radial preload.
第６図は軸部材２に直接内輪の軌道５ａを形成して内輪
と軸部材２とを一体化したものの実施例を示すもので、
軸受３とハウシング１及び軸部材２との配設部の一方の
嵌合部分をなくすことによりスピンドルユニットの半径
方向の遊びをより確実１こなくすことかで゛き、かつス
ピンドルユニットの半径方向のスペースも小さくするこ
とができる。FIG. 6 shows an embodiment in which the inner ring raceway 5a is formed directly on the shaft member 2 to integrate the inner ring and the shaft member 2.
By eliminating the fitting part of one of the fitting parts between the bearing 3, housing 1, and shaft member 2, the radial play of the spindle unit can be more reliably eliminated, and the radial play of the spindle unit can be eliminated. Space can also be reduced.
この場合、外輪とハウジングとを一体化しても同様であ
る。ただ軌道輪の一方をハウジング又は軸部材と一体化
させた場合、周溝の形成位置が他方の軌道輪とハウジン
グ又は軸部材との間に限定され、第６図の実施例の場合
には、内輪が軸部材２と一体化しているので周溝をハウ
ジング１の内周面に周溝１７として形成しているが、外
輪４とハウシング１との間に空間部を形成するものであ
れば外輪４の外周面でも、又ハウシング１の内周面と外
輪４の外周面との両方に形成してもよい。またハウジン
グと外輪とを一体化する場合には、内輪と軸部材との開
に同様の空間部を形成すればよく、例えば軸部材の外周
面に周溝を形成するようにすればよい。In this case, the same effect can be achieved even if the outer ring and the housing are integrated. However, when one of the bearing rings is integrated with the housing or the shaft member, the formation position of the circumferential groove is limited to between the other bearing ring and the housing or the shaft member, and in the case of the embodiment shown in FIG. Since the inner ring is integrated with the shaft member 2, a circumferential groove 17 is formed on the inner circumferential surface of the housing 1, but if a space is formed between the outer ring 4 and the housing 1, the outer ring 4, or both the inner circumferential surface of the housing 1 and the outer circumferential surface of the outer ring 4. Further, when the housing and the outer ring are integrated, a similar space may be formed between the inner ring and the shaft member, for example, a circumferential groove may be formed on the outer peripheral surface of the shaft member.
（発明の効果）
、シ
この発明は以上のように、スピンドルユ・７Ｆに単一の
軸受を用いるだけであるので該二二、ントの軸方向スペ
ースを軸受１個分までの幅まで小さくすることができ、
かつ前記第６図の実施例のように軸受の一方の軌道を２
１ウノング又は軸部材に直接形成するようにすれば該ユ
ニットの半径方向のスペースをも小さくすることかでと
、スピンドルユニットを非常にコンパクトなものにする
ことかで外る。(Effects of the Invention) As described above, this invention uses only a single bearing for the spindle unit 7F, so the axial space of the shaft can be reduced to the width of one bearing. It is possible,
And, as in the embodiment shown in FIG. 6, one track of the bearing is
If the spindle unit is formed directly on the spindle or shaft member, the space in the radial direction of the unit can be reduced, and the spindle unit can be made very compact.
しかも軸受とハウジング及び軸部材との配設部の一方を
しょっばめの嵌合とすることにより軸受自体に半径方向
の予圧を与えてその内部すとまを負とするようにしたの
で、／％’７ジング及び軸部材と軸受との配設部に、従
来のように軸受に軸方向から予圧を与えて該軸受の内部
のすきまをなくす場合には必要となる半径方向のすきま
を設ける必要がなくなる。従って前記一方の配設部の半
径方向の遊びがなくなることは無論とこと、他方の側の
配設部もハウジング又は細部材と軸受とをすき主のない
嵌合としたり、あるいはノ１ウノング又は軸部材に直接
軸受の軌道を形成して一体化することも可能となり該配
設部での半径方向の遊びを完全になくすることができ、
スピンドルユニット全体として半径方向の遊びを皆無と
して該ユニットの精度を大幅に向上させることができる
。Moreover, by fitting the bearing, housing, and shaft member with a tight fit, a preload is applied to the bearing itself in the radial direction, and the internal clearance is made negative. %'7 It is necessary to provide the necessary radial clearance in the mounting area between the ring, shaft member, and bearing in order to eliminate the internal clearance of the bearing by applying preload from the axial direction to the bearing as in the past. disappears. Therefore, it goes without saying that the play in the radial direction of the one arrangement part is eliminated, and that the other arrangement part is also fitted with a clearance-free fit between the housing or the detail material and the bearing. It is also possible to form the bearing raceway directly on the shaft member and integrate it, and radial play in the installation part can be completely eliminated.
The spindle unit as a whole has no play in the radial direction, and the accuracy of the unit can be greatly improved.
また前記周溝（空間部）を形成することにより、ハウジ
ング及び軸部材と軸受との配設部がすきまなく固定され
ても、軸受の内部荷重が前記予圧によって異常に増加す
ることを防止できるので、スピンドルユニットの寿命も
向上させることができる。Furthermore, by forming the circumferential groove (space), even if the housing, shaft member, and bearing are fixed without any gaps, the internal load of the bearing can be prevented from increasing abnormally due to the preload. , the life of the spindle unit can also be improved.
さらにスピンドル・ユニットの予圧量を、ノＡウノング
、細部材及び軸受をそれぞれ単体で加工する際の寸法設
定で先に定めておけるので、該ユニ・ノドの組立時には
ただ単に前記各部材を組込むだけですみ、該ユニットの
組立に伴う予圧調整作業が不要となりユニットの組立作
業が簡素化できる。Furthermore, the amount of preload on the spindle unit can be determined in advance by setting the dimensions when machining the unit, detail materials, and bearings individually, so when assembling the unit, you can simply assemble each of the above components. This eliminates the need for preload adjustment work associated with assembling the unit, and simplifies the assembly work of the unit.
しかも前記各部材を単体で加工する際の加工公差のばら
つきでハウジング及び軸部材と軸受との配設部のしめじ
ろが変化しても、前記周溝（空間部）の作用によって軸
受内部荷重の異常な増加という現象を防止でき、該配設
部に適切なしめじろを与えるために各部材を選択組合わ
せしてユニ・ント組み立てるというような面倒な作業も
未然に防止で外る。Moreover, even if the tightness of the mounting area between the housing, shaft member, and bearing changes due to variations in machining tolerance when each of the above-mentioned parts is machined individually, the internal load of the bearing can be reduced by the action of the circumferential groove (space). The phenomenon of abnormal increase can be prevented, and the troublesome work of assembling a unit by selectively combining each member in order to provide an appropriate margin for the installation part can also be prevented.
第１図はこの発明の第１の実施例を示す縦断面。、＃２
い。１．あ、え１よお、ア一あ、□。他。
実施例を示す要部縦断面図である。
ｌ ・・・・・・・ ハウジング
２ ・・・・・・・・・ 細部材
３ ・・・・・・・・・ 軸受
４ ・・・・・・・・・・ 外輪
５ ・・・・・・・・・・ 内輪
５ａ ・・・・・・・・・・ 軌道
６ ・・・・・・・・・ 転動体
１０、ｌ’ｌ、１２，１３，１４．１５，１６．１７
・・ 周溝手続補正書く方式）
昭和５９年８月２７日
特許庁長官 志 賀 学 殿
１、事件の表示
昭和５９年 特 許願 第９４３４６号２、発明の名称
スピンドルユニット
３、補正をする者
昭和５９年７月１１日（発送日昭和５９年７月３１日）
（内容に変更なし）FIG. 1 is a longitudinal section showing a first embodiment of the invention. , #2
stomach. 1. Ah, E1, A1, □. other. FIG. 2 is a vertical sectional view of main parts showing an example. l...Housing 2...Detail material 3...Bearing 4...Outer ring 5... ...... Inner ring 5a ...... Raceway 6 ...... Rolling elements 10, l'l, 12, 13, 14.15, 16.17
(How to write an amendment to the circumference procedure) August 27, 1980 Manabu Shiga, Director General of the Patent Office 1, Indication of the case 1988 Patent Application No. 94346 2, Name of the invention Spindle unit 3, Person making the amendment Showa July 11, 1959 (Shipping date: July 31, 1982)
(No change in content)
Claims (1)
可能とするべく両部材間に配設した玉軸受とからなるス
ピンドルユニットにおいて、前記玉軸受を内外輪の二つ
の軌道輪を有するただ１個の軸受とし、該軸受と前記両
部材との一方の配設部を、前記一方の軌道輪とハウジン
グ又は軸部材とをしまりばめで嵌合させ軸受の内部すき
まが常に負となるように半径方向から予圧を付与させる
予圧付与部として形成し、かつ他方の配設部を、前記内
外輪の他方の軌道輪とハウジング又は軸部材とをすきま
なく嵌合させたはめあい部として形成するとともに、前
記予圧付与部もしくははめあい部の少なくともいずれか
一方に前記予圧の異常な増加を防止する円周方向に連続
する空間部を設けたことを特徴とするスピンドルユニッ
ト。 （２）前記予圧付与部を玉軸受の内輪と軸部材とをしま
りばめで嵌合させることにより形成し、前記はめあい部
を外輪とハウジングとをすきまなく嵌合させることによ
り形成した特許請求の範囲第１項に記載のスピンドルユ
ニット。 （３）前記予圧付与部を玉軸受の外輪とハウジングとを
しまりばめで嵌合させることにより形成し、前記はめあ
い部を内輪と軸部材とをすきまなく嵌合させることによ
り形成した特許請求の範囲第１項に記載のスピンドル二
二ツ）。 内 ；４）前記空間部がハウジングの司１面に形成した周溝
である特許請求の範囲第２項又は第３項のいずれかに記
載のスピンドルユニット。 ５）前記空間部が外輪の外周面に形成した周溝である特
許請求の範囲第２項に記載のスピンドルユニット。 （６）前記空間部が細部材の外周面に形成した周溝であ
る特許請求の範囲第２項又は第３項のいずれかに記載の
スピンドルユニット。 （７）前記空間部がハウジングの内周面と軸部材の外周
面とに形成した周溝である特許請求の範囲第２項又は第
３項のいずれかに記載のスピンドルユニット。 （８）前記空間部がハウジングの内周面と外輪の外周面
とに形成した周溝である特許請求の範囲第２項に記載の
スピンドルユニット。 （９）ハウジングと、細部材と、該両部材の相対回転を
可能とするべく両部材間に配設した玉軸受とからなるス
ピンドルユニットにおいて、前記玉軸受を内外輪のいず
れか一方のみの軌道輪を有するただ１個の軸受とし、該
軸受と前記両部材との一方の配設部を、前記軌道輪とハ
ウジング又は軸部材とをしょっばめで嵌合させ軸受の内
部すきまが常に負となるように半径方向から予圧を付与
させる予圧イ」４部として形成し、かつ他方の配設部を
、ハウジング又は軸部材に直接軸受の軌道を形成して該
軌道に転動体を配設したハウジング又は軸部材と玉軸受
との一体化部分として形成するとともに、前記予圧付与
部に該予圧の異常な増加を防止する円周方向に連続する
空間部を設けたことを特徴とするスピンドルユニッＦ０ （１０）前記予圧付与部を玉軸受の外輪とハウジングと
をしまりばめで嵌合させることにより形成し、前記一体
化部分を軸部材に直接軸受の軌道を形成して該軌道に転
動体を配設することにより形成したことを特徴とする特
許請求の範囲第９項に記載のスピンドルユニット。 （１１）前記空間部がハウジングの内周面に形成した周
溝である特許請求の範囲第１０項に記載のスピンドルユ
ニット。 （１２）前記空間部が外輪の外周面に形成した周溝であ
る特許請求の範囲第１０項に記載のスピンドルユニット
。 （１３）前記空間部がハウジングの内周面と外輪の外周
面とに形成した周溝である特許請求の範囲第１０項に記
載のスピンドルユニット。[Scope of Claims] (1) In a spindle unit consisting of a housing, a shaft member, and a ball bearing disposed between the two members to enable relative rotation between the two members, the ball bearing is arranged between the inner and outer rings. A single bearing with two bearing rings is provided, and one of the mounting portions of the bearing and the above-mentioned members is fitted with the one bearing ring and the housing or the shaft member with an interference fit to reduce the internal clearance of the bearing. is formed as a preload applying part that applies a preload from the radial direction so that is always negative, and the other disposed part is fitted with the other bearing ring of the inner and outer rings and the housing or the shaft member without a gap. A spindle unit characterized in that the spindle unit is formed as a fitting part and further includes a circumferentially continuous space part provided in at least one of the preload applying part and the fitting part to prevent an abnormal increase in the preload. (2) Claims in which the preload applying portion is formed by tightly fitting the inner ring of the ball bearing and the shaft member, and the fitting portion is formed by fitting the outer ring and the housing without any gaps. The spindle unit according to item 1. (3) Claims in which the preload applying portion is formed by tightly fitting the outer ring of the ball bearing and the housing, and the fitting portion is formed by fitting the inner ring and the shaft member without any clearance. spindle (22) as described in paragraph 1). 4) The spindle unit according to claim 2 or 3, wherein the space is a circumferential groove formed on a first surface of the housing. 5) The spindle unit according to claim 2, wherein the space is a circumferential groove formed on the outer peripheral surface of the outer ring. (6) The spindle unit according to claim 2 or 3, wherein the space is a circumferential groove formed on the outer peripheral surface of the detail material. (7) The spindle unit according to claim 2 or 3, wherein the space is a circumferential groove formed in the inner circumferential surface of the housing and the outer circumferential surface of the shaft member. (8) The spindle unit according to claim 2, wherein the space portion is a circumferential groove formed in the inner circumferential surface of the housing and the outer circumferential surface of the outer ring. (9) In a spindle unit consisting of a housing, a detail member, and a ball bearing disposed between the two members to enable relative rotation between the two members, the ball bearing is attached to the raceway of only one of the inner and outer rings. Only one bearing having a ring is provided, and the bearing ring and the housing or the shaft member are fitted with a tight fit in one of the mounting portions of the bearing and the two members, so that the internal clearance of the bearing is always negative. A housing or a housing in which a preload is applied from the radial direction as shown in FIG. A spindle unit F0 (10 ) The preload applying portion is formed by tightly fitting the outer ring of the ball bearing and the housing, the integrated portion forms a bearing raceway directly on the shaft member, and the rolling elements are arranged on the raceway. The spindle unit according to claim 9, characterized in that it is formed by. (11) The spindle unit according to claim 10, wherein the space is a circumferential groove formed in the inner peripheral surface of the housing. (12) The spindle unit according to claim 10, wherein the space is a circumferential groove formed on the outer peripheral surface of the outer ring. (13) The spindle unit according to claim 10, wherein the space is a circumferential groove formed in the inner circumferential surface of the housing and the outer circumferential surface of the outer ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9434684A JPS60237217A (en) | 1984-05-10 | 1984-05-10 | Spindle unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9434684A JPS60237217A (en) | 1984-05-10 | 1984-05-10 | Spindle unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60237217A true JPS60237217A (en) | 1985-11-26 |
Family
ID=14107719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9434684A Pending JPS60237217A (en) | 1984-05-10 | 1984-05-10 | Spindle unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60237217A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1880920A1 (en) * | 2003-12-04 | 2008-01-23 | JTEKT Corporation | Steering apparatus for vehicle |
| JP2014043898A (en) * | 2012-08-27 | 2014-03-13 | Jtekt Corp | Rolling bearing device |
| JP2017075629A (en) * | 2015-10-14 | 2017-04-20 | 株式会社デンソー | Rotary electric machine |
| CN109488695A (en) * | 2017-09-11 | 2019-03-19 | 铃木株式会社 | Bearing cage structure and its manufacturing method |
| WO2022264877A1 (en) * | 2021-06-14 | 2022-12-22 | Ntn株式会社 | Vehicular power device and vehicle wheel bearing device with power generator |
-
1984
- 1984-05-10 JP JP9434684A patent/JPS60237217A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1880920A1 (en) * | 2003-12-04 | 2008-01-23 | JTEKT Corporation | Steering apparatus for vehicle |
| EP1880920A4 (en) * | 2003-12-04 | 2009-11-25 | Jtekt Corp | Steering apparatus for vehicle |
| US8104567B2 (en) | 2003-12-04 | 2012-01-31 | Jtekt Corporation | Vehicle steering apparatus |
| JP2014043898A (en) * | 2012-08-27 | 2014-03-13 | Jtekt Corp | Rolling bearing device |
| JP2017075629A (en) * | 2015-10-14 | 2017-04-20 | 株式会社デンソー | Rotary electric machine |
| CN109488695A (en) * | 2017-09-11 | 2019-03-19 | 铃木株式会社 | Bearing cage structure and its manufacturing method |
| CN109488695B (en) * | 2017-09-11 | 2021-04-02 | 铃木株式会社 | Bearing part structure and manufacturing method thereof |
| WO2022264877A1 (en) * | 2021-06-14 | 2022-12-22 | Ntn株式会社 | Vehicular power device and vehicle wheel bearing device with power generator |
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