JP3309707B2 - Bearing structure - Google Patents
Bearing structureInfo
- Publication number
- JP3309707B2 JP3309707B2 JP11757996A JP11757996A JP3309707B2 JP 3309707 B2 JP3309707 B2 JP 3309707B2 JP 11757996 A JP11757996 A JP 11757996A JP 11757996 A JP11757996 A JP 11757996A JP 3309707 B2 JP3309707 B2 JP 3309707B2
- Authority
- JP
- Japan
- Prior art keywords
- bracket
- sleeve
- press
- peripheral surface
- yoke
- 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.)
- Expired - Fee Related
Links
- 230000002093 peripheral effect Effects 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- 102220057728 rs151235720 Human genes 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
- Motor Or Generator Frames (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、流体軸受等の軸受
スリーブ圧入時の支持構造体であるブラケットおよびそ
の外周部に圧入されるヨークの圧入部構造体に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bracket as a support structure for press-fitting a bearing sleeve of a fluid bearing or the like, and a press-fitting structure of a yoke press-fitted to the outer periphery thereof.
【０００２】[0002]
【従来の技術】近年、マルチメディア機器の小型化・高
機能化に伴い、それに利用されるモータ等の回転構造体
についても、小型・高精度・高速回転が要求されるよう
になり、その軸受として、流体軸受等が多く利用される
ようになったが、さらなる小型・高精度・高速化の要求
を受け、加工・組立精度の向上が望まれるとともに、コ
ストダウンを目指した生産性の向上が課題とされてい
た。2. Description of the Related Art In recent years, with the miniaturization and high performance of multimedia devices, small, high-precision, high-speed rotation has also been required for rotating structures such as motors used for the multimedia devices. Fluid bearings have come into widespread use, but demands for ever-smaller, higher precision, and higher speeds have led to demands for improved processing and assembly accuracy, as well as increased productivity aimed at reducing costs. Was an issue.
【０００３】以下に高精度・高速回転が可能な軸受構造
体の代表例として従来の流体軸受構造について説明す
る。A conventional hydrodynamic bearing structure will be described below as a typical example of a bearing structure capable of high-precision and high-speed rotation.
【０００４】図１３は流体軸受が利用される代表的な製
品としてモータの断面図を示す。流体軸受は図１３に示
すように、グループと呼ばれる溝１３ａを有する軸１３
と、軸と同様にグループが加工され、なおかつ軸を支持
するスリーブ１から構成されており、軸１３にはターン
テーブル１５やマグネット１４等が固定されており、ス
リーブ１とスラスト方向の軸受１６により支持され回転
する。また、スリーブ１はブラケット１１の内周に固定
されており、ブラケット１１の外周には、コイル１２が
付設されたヨーク１０が固定されている。FIG. 13 is a sectional view of a motor as a typical product using a fluid bearing. As shown in FIG. 13, the fluid bearing has a shaft 13 having a groove 13a called a group.
, A group is machined in the same manner as the shaft, and the sleeve 1 supports the shaft. The turntable 15 and the magnet 14 are fixed to the shaft 13. Supported and rotated. The sleeve 1 is fixed to the inner circumference of the bracket 11, and the yoke 10 to which the coil 12 is attached is fixed to the outer circumference of the bracket 11.
【０００５】一般的に、図１３で示すような構造を有す
るモータの流体軸受は、従来は、図１４に示すような円
筒状の内周面１１ａを有するブラケット１１に、円筒状
に加工したスリーブ１を圧入した後に、圧入により生ず
るスリーブ１の内周面１ａの歪を除去するために再度内
周面１ａを研削することにより真円度および円筒度を確
保し、その後グループ加工を行っていた。また、さらに
ヨーク１０をブラケット１１の外周に圧入する場合は、
ヨーク１０の圧入により発生するブラケット１１の歪が
スリーブ１の内周面１ａの歪を助長するため、ヨーク１
０も圧入した状態でスリーブ内面加工を行わねばならな
かった。In general, a fluid bearing for a motor having a structure as shown in FIG. 13 is conventionally provided with a sleeve 11 formed into a cylindrical shape on a bracket 11 having a cylindrical inner peripheral surface 11a as shown in FIG. After press-fitting, the inner circumferential surface 1a is ground again to remove the distortion of the inner circumferential surface 1a of the sleeve 1 caused by the press-fitting, thereby ensuring roundness and cylindricity, and thereafter performing group processing. . When the yoke 10 is further pressed into the outer periphery of the bracket 11,
The distortion of the bracket 11 caused by the press-fitting of the yoke 10 promotes the distortion of the inner peripheral surface 1 a of the sleeve 1.
In addition, the inner surface of the sleeve had to be machined in a state where 0 was press-fitted.
【０００６】[0006]
【発明が解決しようとする課題】このような従来の構造
では、既に単体で内面仕上げやグループ加工を完了した
スリーブ１をブラケット１１に圧入する場合と比較し、
生産設備が大型化・複雑化するとともに、加工工程数が
増え、コストや生産性の点で問題となっていた。In such a conventional structure, compared with the case where the sleeve 1 which has already been subjected to the inner surface finishing and group processing by itself is pressed into the bracket 11,
Production equipment has become larger and more complex, and the number of processing steps has increased, which has been a problem in terms of cost and productivity.
【０００７】このように、スリーブ１を円筒状の内周面
を有したブラケット１１に圧入した場合、ブラケット１
１の断面図である図１５の矢印Ｂに示すように、圧入時
のブラケットの変形は全体的に外径方向に向き、その結
果、ブラケット１１の円周方向に一様な強い引張力が働
くこととなり、圧入による少しの径変化でもスリーブに
対しては非常に大きな圧縮力が働き、圧入代のばらつき
等加工時のばらつき要素が、流軸を支持する上で精度が
要求されるスリーブ１の内周面１ａの歪に与える影響も
大きくなった。そのため、スリーブ１圧入後に内面仕上
げやグループ加工を行うことにより精度を出す必要があ
った。例えば、内径６ｍｍ板厚１ｍｍの鉄製のブラケッ
ト１０に、内径２ｍｍで外径に３０μｍの圧入代をもっ
た黄銅製のスリーブ１を圧入する場合、スリーブ１の内
径歪に与える影響は、約１０μｍ程度となり、許容値と
される１μｍ以内に抑えるためにはμｍオーダーでの均
一な圧入代加工が必要となる。しかしながら、生産性向
上やコストダウンを目指すためには、ブラケット１１と
して、板金プレス成形等の切削に比べると加工精度は落
ちるが生産性がよい部品を利用することが必要である
が、仕様を満足する加工精度を得ることができず大きな
障害となっていた。さらにブラケット１１の外周部にヨ
ーク１０を圧入する場合はスリーブ１に対しさらに圧縮
力が加わって働くこととなり、上記の障害がより顕著に
現れた。流体軸受の高精度・高速回転を確保しなおかつ
コストダウンを目指した生産性の向上を実現するために
は、スリーブ１とブラケット１１の圧入代ばらつきの多
少にかかわらず、スリーブ１と軸１３の間に、より均一
で微小な隙間を確保することが必要となる。As described above, when the sleeve 1 is pressed into the bracket 11 having the cylindrical inner peripheral surface, the bracket 1
As shown by an arrow B in FIG. 15 which is a sectional view of FIG. 1, the deformation of the bracket at the time of press-fitting is generally directed in the outer diameter direction, and as a result, a uniform strong tensile force acts in the circumferential direction of the bracket 11. In other words, a very large compressive force acts on the sleeve even with a small diameter change due to press-fitting, and variations in the processing such as variations in press-fit allowance are caused by the need for precision in supporting the flow axis. The influence on the distortion of the inner peripheral surface 1a also increased. Therefore, it is necessary to improve the accuracy by performing the inner surface finishing or the group processing after the press-fitting of the sleeve 1. For example, when a brass sleeve 1 having an inner diameter of 2 mm and an outer diameter of 30 μm is press-fitted into an iron bracket 10 having an inner diameter of 6 mm and a thickness of 1 mm, the influence on the inner diameter distortion of the sleeve 1 is about 10 μm. In order to keep the allowable value within 1 μm, uniform press-fitting processing on the order of μm is required. However, in order to improve productivity and reduce costs, it is necessary to use, as the bracket 11, a part that has a lower processing accuracy but higher productivity than cutting such as sheet metal press forming , but satisfies the specifications. Processing accuracy could not be obtained, which was a major obstacle. Further, when the yoke 10 is pressed into the outer periphery of the bracket 11, the compressive force is further applied to the sleeve 1, so that the above-mentioned obstacles become more prominent. In order to ensure high precision and high speed rotation of the fluid bearing and to improve the productivity with the aim of reducing costs, it is necessary to set the distance between the sleeve 1 and the shaft 13 regardless of the variation in the press-fit allowance between the sleeve 1 and the bracket 11. In addition, it is necessary to secure more uniform and minute gaps.
【０００８】本発明は上記従来の問題を解決するもので
あり、ブラケット１１へのスリーブ１の圧入時とスリー
ブ１の圧入に加えヨーク１０をブラケット１１の外周に
さらに圧入する際に発生する、スリーブ１の内径歪を抑
え、圧入後の内面仕上げやグループ加工をなくすことを
目的とする。The present invention solves the above-mentioned conventional problems. The sleeve is generated when the sleeve 1 is pressed into the bracket 11 and when the yoke 10 is further pressed into the outer periphery of the bracket 11 in addition to the sleeve 1. It is an object of the present invention to suppress the inner diameter distortion and eliminate inner surface finishing and group processing after press fitting.
【０００９】[0009]
【課題を解決するための手段】請求項１に係る軸受構造
体では、この問題を解決するために、軸受スリーブと、
その支持構造体であるブラケット内周面のスリーブが圧
入される部分の軸方向に連なり径方向に突出した凸部を
円周方向に複数本有すると共に、スリーブ圧入用に設け
られた前記ブラケット内周面の凸部と互い違いになり半
径方向に重ならないように、前記ブラケットの外周面の
ヨークが圧入される部分に、軸方向に連なり径方向に突
出した凸部を円周方向に複数本備え、スリーブとブラケ
ットとヨークを圧入により締結した構造とする。According to a first aspect of the present invention, there is provided a bearing structure comprising: a bearing sleeve;
The projecting portion that extends in the axial direction and continues in the axial direction of the part where the sleeve on the inner peripheral surface of the bracket that is the support structure is press-fitted
It has a plurality in the circumferential direction and is provided for press-fitting the sleeve.
Half of the bracket and the projection on the inner peripheral surface of the bracket.
So that they do not overlap in the radial direction,
The part where the yoke is pressed is connected in the axial direction and protrudes in the radial direction.
Equipped with a plurality of raised protrusions in the circumferential direction,
And yoke are fastened by press-fitting .
【００１０】請求項２に係る軸受構造体では、スリーブ
に加えヨークがブラケットの外周に圧入される場合につ
いて、ヨークの内周面に、ブラケット内周面のスリーブ
圧入部分に設けられた軸方向に連なり径方向に突出した
凸部と互い違いになり半径方向に重ならないように、軸
方向に連なり径方向に突出した凸部を設け、なおかつ、
ブラケットの内周面の凸部と互い違いになり半径方向に
重ならないように、ヨークを圧入する構造とする。In the bearing structure according to the second aspect, when the yoke is press-fitted on the outer periphery of the bracket in addition to the sleeve, the yoke is provided on the inner peripheral surface of the yoke in the axial direction provided at the sleeve press-fit portion of the inner peripheral surface of the bracket. In order to be alternate with the radially projecting convex portion and not to overlap in the radial direction, a radially projecting convex portion continuous with the axial direction is provided, and
The yoke is press-fitted so as to be staggered with the protrusion on the inner peripheral surface of the bracket and not overlap in the radial direction.
【００１１】これらの凸部の形状は、ブラケットの内外
周面またはヨークの内周面が円筒形状である場合、その
内周面または外周面に設けた平面部により形成されるも
のでも良く、また、それらの内周面または外周面から突
出した直線状リブにより形成されるものでも良く、それ
ぞれの組合せによって形成されていてもよい。[0011] When the inner and outer peripheral surfaces of the bracket or the yoke are cylindrical, the shape of these convex portions may be formed by a flat portion provided on the inner or outer peripheral surface thereof. May be formed by linear ribs protruding from the inner peripheral surface or the outer peripheral surface thereof, or may be formed by a combination thereof.
【００１２】また、凸部の個数については、特に制限は
無いが、安定したスリーブの保持ならびにスリーブとブ
ラケットの軸心を一致させるためには３個以上を備える
ことが望ましい。また、スリーブに加えブラケットの外
周にヨークを圧入する場合は、凸部をブラケットの内外
周それぞれに設けるか、ブラケットの内周とヨークの内
周に設けるが、請求項２または請求項３に示す様に、ブ
ラケット内外周またはブラケット内周とヨーク内周の凸
部の位置が互い違いとなり半径方向に重ならない構成と
する限り、その本数は必ずしも内外周で同一とする必要
はない。ただし、凸部の数が少なすぎると、ヨークの圧
入によりスリーブを保持するブラケット内周の凸部が外
周方向に開きスリーブの保持力が弱くなるともあり、逆
に、凸部の数が多すぎると、ヨークの圧入により、スリ
ーブを保持するブラケット内周の凸部が内周方向に大き
く歪むこととなり、スリーブ１の変形が増大することも
あり、その大小関係については寸法や材料や圧入代によ
り異なるため、その関係を数値解析や実験により検証し
たうえで、ヨークの圧入がスリーブ変形を抑えなおかつ
抜け強度を十分に保つことができる寸法とすることが必
要となる。最も望ましいのは、ヨークの圧入がブラケッ
ト上のスリーブ圧入用の凸部の位置変化に与える影響が
最も少なくなる凸部の本数および位置とすることであ
り、加工ばらつきの影響が少なくなるとともに設計が容
易になる。例えば、内径６ｍｍ、板厚１ｍｍの鉄製のブ
ラケットの場合、スリーブ１の圧力に加えヨーク９また
はヨーク１０を圧力する場合の圧入点数はブラケットの
内外周ともに等間隔に６個の凸部を設けることが望まし
いとの結果が得られている。There is no particular limitation on the number of projections, but it is preferable to provide three or more projections in order to hold the sleeve stably and to match the axis of the sleeve with the bracket. When the yoke is press-fitted on the outer periphery of the bracket in addition to the sleeve, the convex portion is provided on each of the inner and outer periphery of the bracket, or provided on the inner periphery of the bracket and the inner periphery of the yoke. Thus, as long as the inner and outer circumferences of the bracket or the positions of the protrusions on the inner circumference of the bracket and the inner circumference of the yoke are alternated and do not overlap in the radial direction, the number of the inner and outer circumferences does not necessarily have to be the same. However, if the number of the convex portions is too small, the convex portion on the inner periphery of the bracket for holding the sleeve by press-fitting of the yoke may open in the outer peripheral direction and the holding force of the sleeve may be weak, and conversely, the number of convex portions may be too large. And the press-fitting of the yoke causes the convex portion of the inner periphery of the bracket holding the sleeve to be greatly distorted in the inner circumferential direction, and the deformation of the sleeve 1 may be increased. Since the relationship is different, it is necessary to verify the relationship by numerical analysis and experiments and to set the dimensions so that the press-fitting of the yoke can suppress the sleeve deformation and sufficiently maintain the pull-out strength. The most desirable is to set the number and position of the protrusions to minimize the influence of press-fitting of the yoke on the position change of the protrusion for sleeve press-fitting on the bracket. It will be easier. For example, in the case of an iron bracket having an inner diameter of 6 mm and a plate thickness of 1 mm, the number of press-fitting points when pressing the yoke 9 or the yoke 10 in addition to the pressure of the sleeve 1 is to provide six protrusions at equal intervals on the inner and outer circumferences of the bracket. Is desirable.
【００１３】これらの構造とすることにより、ブラケッ
トへのスリーブ圧入時とスリーブ圧入に加えブラケット
外周にヨークを圧入する際に発生するスリーブの内径歪
を抑えることが可能となる。By adopting these structures, it is possible to suppress the inner diameter distortion of the sleeve which occurs when the yoke is pressed into the outer periphery of the bracket in addition to the press-fitting of the sleeve into the bracket and the press-fitting of the sleeve.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態につい
て、図面を参照しながら説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１５】（実施の形態１） 図１において、２は図１３で示したブラケット１１にあ
たり、スリーブ１の外径よりやや大きい内径を有する円
筒上の内周面２ａに平面部を設けることにより作成した
複数個の凸部３を有したブラケットであり、凸部３に内
接する円の径はスリーブ１の径より小さく、その差が圧
入代となる。図２はその断面図であり、図中に示す矢印
Ａはスリーブ圧入時のブラケットの変形を示す。(Embodiment 1) In FIG. 1, reference numeral 2 denotes a bracket 11 shown in FIG. 13, which is formed by providing a flat portion on an inner peripheral surface 2a on a cylinder having an inner diameter slightly larger than the outer diameter of the sleeve 1. And a diameter of a circle inscribed in the projections 3 is smaller than a diameter of the sleeve 1, and a difference between the diameters is a press-fitting allowance. FIG. 2 is a cross-sectional view of the bracket, and an arrow A shown in the figure shows the deformation of the bracket when the sleeve is press-fitted.
【００１６】以上の様なブラケット２を用いスリーブ１
を圧入することにより、ブラケット２には、従来方法の
ように全体が一様に外周方向へ変形し円周方向へ一様な
引張り力が発生する変形とは異なり、図２に示すよう
に、矢印Ａに示す様に、凸部３が凸部３の間の点Ｐより
外径方向へ大きく変形することとなる。図２では、凸部
３と凸部３の間の点Ｐは外径方向に変形するように矢印
Ａを描いているが、ブラケット２の肉厚や凸部３の個数
や圧入代によっては点Ｐは内径方向にも外径方向にも変
形する可能性がある。この様な凸部３を設けることによ
り、結果として凸部３と凸部３の間のブラケット部分が
引張りとともに曲げ的な変形を発生することとなる。引
張り的な変形と比較しこのような曲げ的な変形は、より
小さな力で起こるため、圧入代変化に対するスリーブ１
の圧入力変化が抑えられることとなり、加工ばらつき等
に起因する圧入代ばらつきがスリーブ１の内周面１ａの
歪に与える影響が抑えられる。例えば、内径６ｍｍ板厚
１ｍｍの鉄製のブラケット１０に、内径２ｍｍで外形に
３０μｍの圧入代をもった黄銅製のスリブ１を圧入する
場合、スリーブ１の内径歪に与える影響は、従来は約１
０μｍであったが本実施の形態の構成とし３つの凸部３
を等間隔に設け圧入を行うことにより、スリーブ１の内
径歪を許容値とされる１μｍ以下に抑えることができ
る。A sleeve 1 using the bracket 2 as described above.
Is press-fitted into the bracket 2, unlike the conventional method, in which the whole is uniformly deformed in the outer circumferential direction and a uniform tensile force is generated in the circumferential direction, as shown in FIG. As shown by the arrow A, the convex portion 3 is greatly deformed in the outer diameter direction from the point P between the convex portions 3. In FIG. 2, an arrow A is drawn so that the point P between the convex portions 3 is deformed in the outer diameter direction. However, depending on the thickness of the bracket 2, the number of the convex portions 3, and the press-fitting allowance, the point P may be changed. P may be deformed in both the inner diameter direction and the outer diameter direction. By providing such a convex part 3, as a result, the bracket part between the convex parts 3 will generate bending deformation with tension. Since such a bending deformation occurs with a smaller force as compared with a tensile deformation, the sleeve 1 against the press-in allowance change.
Is suppressed, and the influence of the press-fit allowance variation resulting from the processing variation and the like on the distortion of the inner peripheral surface 1a of the sleeve 1 is suppressed. For example, when a brass slab 1 having an inner diameter of 2 mm and an outer diameter of 30 μm is press-fitted into an iron bracket 10 having an inner diameter of 6 mm and a thickness of 1 mm, the influence on the inner diameter distortion of the sleeve 1 is conventionally about 1 mm.
Although it was 0 μm, the three projections 3
Are provided at equal intervals and press-fitted, the inner diameter distortion of the sleeve 1 can be suppressed to an allowable value of 1 μm or less.
【００１７】（実施の形態２） なお、第１の実施の形態において、ブラケット２の内周
面２ａに設けた平面部により凸部３を形成したが、図３
および図４に示すように、内周面から突出した直線状リ
ブにより凸部４を形成しても良い。(Embodiment 2) In the first embodiment, the convex portion 3 is formed by a flat portion provided on the inner peripheral surface 2a of the bracket 2, but FIG.
As shown in FIG. 4, the convex portion 4 may be formed by a linear rib protruding from the inner peripheral surface.
【００１８】なお、実施の形態１および実施の形態２に
おいて、３個の凸部を等間隔で設けたものを例として示
したが、必ずしも等間隔である必要はない。In the first and second embodiments, an example in which three convex portions are provided at equal intervals has been described as an example, but they are not necessarily required to be at equal intervals.
【００１９】（実施の形態３） また、図５に示すように、ブラケットの外周側にヨーク
１０を圧入することが一般的に行われるが、その場合、
ブラケット２の内周面２ａに設けた凸部３に加え、図６
に示すように、ブラケット２の外周面２ｂにも凸部３と
互い違いになり半径方向に重ならないように外周面から
突出した直線状リブの凸部５を設けることにより、ヨー
ク１０の圧入がスリーブ１の内径変化に与える影響も抑
制することができる。Third Embodiment As shown in FIG. 5, it is common practice to press-fit a yoke 10 on the outer peripheral side of a bracket.
In addition to the protrusions 3 provided on the inner peripheral surface 2a of the bracket 2, FIG.
As shown in the figure, the outer peripheral surface 2b of the bracket 2 is provided with the convex portion 5 of a linear rib which is alternately arranged with the convex portion 3 and protrudes from the outer peripheral surface so as not to overlap in the radial direction. 1 can be suppressed from affecting the change in inner diameter.
【００２０】（実施の形態４） なお、図７に示すように、図５に示したブラケット外周
側の凸部５は、円筒状の外周面２ｂに平面状に切欠き２
ｃを設けることにより凸部６として形成しても良い。(Embodiment 4) As shown in FIG. 7, the projection 5 on the outer peripheral side of the bracket shown in FIG.
The protrusion 6 may be formed by providing c.
【００２１】なお、実施の形態３および実施の形態４に
おいて、６個の凸部をブラケット２の内外周部ともに等
間隔で設けたものを例として示したが、必ずしも等間隔
である必要はない。In the third and fourth embodiments, six convex portions are provided at equal intervals on the inner and outer peripheral portions of the bracket 2 as an example. However, they are not necessarily required to be at equal intervals. .
【００２２】（実施の形態５） なお、図９に示すように、凸部７はヨーク９の内周面９
ａに設け、図１０に示すように、ブラケット２の内周面
２ａの凸部３と互い違いになり半径方向に重ならないよ
うに圧入することによっても、ヨーク９の圧入がスリー
ブ１の内径変化に与える影響を抑制することができる。(Fifth Embodiment) As shown in FIG.
a, and press-fitted so as not to overlap with the projection 3 of the inner peripheral surface 2a of the bracket 2 in the radial direction as shown in FIG. It is possible to suppress the influence.
【００２３】（実施の形態６） また、図１１に示すように、ヨーク９の内周面９ａに設
ける凸部８は、第１の実施の形態で示したブラケット２
の内周面２ａに設けた凸部３の様に、円筒面の内周面に
平面部を設けることにより形成しても良い。(Embodiment 6) As shown in FIG. 11, the protrusion 8 provided on the inner peripheral surface 9a of the yoke 9 is provided with the bracket 2 shown in the first embodiment.
It may be formed by providing a flat portion on the inner peripheral surface of the cylindrical surface like the convex portion 3 provided on the inner peripheral surface 2a.
【００２４】なお、実施の形態５および実施の形態６に
おいて、ブラケット２の内周部およびスリーブ１の内周
部ともに６個の凸部を等間隔で設け、それらが互いに等
間隔になるように圧入したものを例として示したが、必
ずしも等間隔である必要はない。In the fifth embodiment and the sixth embodiment, six convex portions are provided at equal intervals on both the inner peripheral portion of the bracket 2 and the inner peripheral portion of the sleeve 1 so that they are equally spaced from each other. Although the press-fitted one is shown as an example, it is not necessarily required to be equally spaced.
【００２５】[0025]
【発明の効果】以上のように、本発明は、流体軸受等の
軸受スリーブと、その支持構造体であるブラケットへの
圧入方式での固定において、スリーブが圧入される内周
面の軸方向に連なる凸部を円周方向に複数本有するブラ
ケットを用いることにより、スリーブ圧入時に発生する
スリーブの内径歪を抑えることが可能となり、また、ス
リーブに加えヨークをブラケット外周に圧入する場合
は、ブラケットの外周面またはヨークの内周面に、ブラ
ケット内周面のスリーブ圧入部分に設けられた凸部と互
い違いになり半径方向に重ならないように凸部を設けた
ブラケットまたはヨークを用いることにより、ヨークの
圧入がスリーブの内径歪に与える影響を抑制することが
可能となり、流体軸受等の軸受構造体の高精度、高速回
転を維持した上での生産性向上が実現できる。As described above, according to the present invention, in fixing a bearing sleeve such as a fluid bearing and a bracket which is a supporting structure thereof by a press-fitting method, the inner circumferential surface of the sleeve is press-fitted in the axial direction. By using a bracket having a plurality of continuous convex portions in the circumferential direction, it is possible to suppress the inner diameter distortion of the sleeve that occurs at the time of press-fitting the sleeve. By using a bracket or yoke provided with a convex portion on the outer peripheral surface or the inner peripheral surface of the yoke so as to be alternate with the convex portion provided on the sleeve press-fitting portion of the bracket inner peripheral surface so as not to overlap in the radial direction, It is possible to suppress the influence of press fitting on the inner diameter distortion of the sleeve, and to maintain high precision and high speed rotation of the bearing structure such as a fluid bearing. Production improvement can be realized.
【図１】本発明の第１の実施の形態におけるスリーブと
ブラケットの斜視図FIG. 1 is a perspective view of a sleeve and a bracket according to a first embodiment of the present invention.
【図２】本発明の第１の実施の形態におけるスリーブと
ブラケットの断面図FIG. 2 is a sectional view of a sleeve and a bracket according to the first embodiment of the present invention.
【図３】本発明の第２の実施の形態におけるスリーブと
ブラケットの斜視図FIG. 3 is a perspective view of a sleeve and a bracket according to a second embodiment of the present invention.
【図４】本発明の第２の実施の形態におけるスリーブと
ブラケットの断面図FIG. 4 is a sectional view of a sleeve and a bracket according to a second embodiment of the present invention.
【図５】本発明の第３の実施の形態におけるスリーブと
ブラケットとヨークの斜視図FIG. 5 is a perspective view of a sleeve, a bracket, and a yoke according to a third embodiment of the present invention.
【図６】本発明の第３の実施の形態におけるスリーブと
ブラケットの断面図FIG. 6 is a sectional view of a sleeve and a bracket according to a third embodiment of the present invention.
【図７】本発明の第４の実施の形態におけるスリーブと
ブラケットとヨークの斜視図FIG. 7 is a perspective view of a sleeve, a bracket, and a yoke according to a fourth embodiment of the present invention.
【図８】本発明の第４の実施の形態におけるスリーブと
ブラケットの断面図FIG. 8 is a sectional view of a sleeve and a bracket according to a fourth embodiment of the present invention.
【図９】本発明の第５の実施の形態におけるスリーブと
ブラケットとヨークの斜視図FIG. 9 is a perspective view of a sleeve, a bracket, and a yoke according to a fifth embodiment of the present invention.
【図１０】本発明の第５の実施の形態におけるスリーブ
とブラケットとヨークの断面図FIG. 10 is a sectional view of a sleeve, a bracket, and a yoke according to a fifth embodiment of the present invention.
【図１１】本発明の第６の実施の形態におけるスリーブ
とブラケットとヨークの斜視図FIG. 11 is a perspective view of a sleeve, a bracket, and a yoke according to a sixth embodiment of the present invention.
【図１２】本発明の第６の実施の形態におけるスリーブ
とブラケットとヨークの断面図FIG. 12 is a sectional view of a sleeve, a bracket, and a yoke according to a sixth embodiment of the present invention.
【図１３】流体軸受を用いたモータの断面図FIG. 13 is a sectional view of a motor using a fluid bearing.
【図１４】従来のスリーブとブラケットの斜視図FIG. 14 is a perspective view of a conventional sleeve and bracket.
【図１５】従来のスリーブとブラケットの断面図FIG. 15 is a sectional view of a conventional sleeve and bracket.
１ スリーブ ２ ブラケット ２ａ ブラケット内周面 ２ｂ ブラケット外周面 ２ｃ ブラケット外周面の平面部 ３ ブラケット内周面の凸部 ４ ブラケット内周面の凸部 ５ ブラケット外周面の凸部 ６ ブラケット外周面の凸部 ７ ヨーク内周面の凸部 ８ ヨーク内周面の凸部 ９ ヨーク ９ａ ヨーク内周面 １０ ヨーク １０ａ ヨークの内周面 １１ ブラケット １１ａ ブラケットの内周面 １２ コイル １３ 軸 １３ａ グループ １４ マグネット １５ ターンテーブル １６ スラスト軸受 Reference Signs List 1 sleeve 2 bracket 2a inner peripheral surface of bracket 2b outer peripheral surface of bracket 2c flat portion of outer peripheral surface of bracket 3 convex portion of inner peripheral surface of bracket 4 convex portion of inner peripheral surface of bracket 5 convex portion of outer peripheral surface of bracket 6 convex portion of outer peripheral surface of bracket 7 Projection on Yoke Inner Surface 8 Projection on Yoke Inner Surface 9 Yoke 9a Yoke Inner Surface 10 Yoke 10a Inner Surface of Yoke 11 Bracket 11a Inner Surface of Bracket 12 Coil 13 Axis 13a Group 14 Magnet 15 Turntable 16 Thrust bearing
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−74867（ＪＰ，Ａ) 特開 平７−83236（ＪＰ，Ａ) 特開 平６−17821（ＪＰ，Ａ) 実開 平４−99422（ＪＰ，Ｕ) 実開 平６−44364（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16C 35/00 - 43/08 F16B 4/00 F16C 17/00 - 17/26 F16C 33/00 - 33/28 H02K 5/00 - 7/20 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-74867 (JP, A) JP-A-7-83236 (JP, A) JP-A-6-17821 (JP, A) 99422 (JP, U) Japanese Utility Model Hei 6-44364 (JP, U) (58) Fields studied (Int. Cl. 7 , DB name) F16C 35/00-43/08 F16B 4/00 F16C 17/00- 17/26 F16C 33/00-33/28 H02K 5/00-7/20
Claims (5)
ブラケット内周面のスリーブが圧入される部分の軸方向
に連なり径方向に突出した凸部を円周方向に複数本有す
ると共に、スリーブ圧入用に設けられた前記ブラケット
内周面の凸部と互い違いになり半径方向に重ならないよ
うに、前記ブラケットの外周面のヨークが圧入される部
分に、軸方向に連なり径方向に突出した凸部を円周方向
に複数本備え、スリーブとブラケットとヨークを圧入に
より締結した軸受構造体。1. A bearing sleeve, Yusuke plurality of protrusions that the sleeve of the bracket in the peripheral surface is a support structure projecting radially continuous to the axial direction of the portion to be press-fitted in the circumferential direction <br / And the bracket provided for press-fitting the sleeve
It is staggered with the protrusion on the inner peripheral surface and does not overlap in the radial direction
Thus, the portion of the outer peripheral surface of the bracket into which the yoke is press-fitted.
Minutely, the convex part that continues in the axial direction and protrudes in the radial direction is
And press-fit sleeve, bracket and yoke
More tightened bearing structure.
内周面の凸部と互い違いになり半径方向に重ならないよ
うに、ブラケットの外周面に圧入されるヨークの内周面
に、軸方向に連なり径方向に突出した凸部を円周方向に
複数本備え、スリーブとブラケットとヨークを圧入によ
り固定した請求項１記載の軸受構造体。2. A bracket provided for press-fitting a sleeve.
It is staggered with the protrusion on the inner peripheral surface and does not overlap in the radial direction
As shown, the inner peripheral surface of the yoke that is pressed into the outer peripheral surface of the bracket
The radially projecting projections that extend in the axial direction
Pressing the sleeve, bracket and yoke
The bearing structure according to claim 1, wherein the bearing structure is fixed .
トの内外周面またはヨークの内周面に設けた平面部によ
り形成される、請求項１〜２のいずれかに記載の軸受構
造体。3. The bracket according to claim 1, wherein said projection has a cylindrical shape.
The inner and outer peripheral surfaces of the
The bearing structure according to claim 1, wherein the bearing structure is formed.
はヨークの内周面の径方向に突出した直線状リブであ
る、請求項１〜２のいずれかに記載の軸受構造体。 4. The method according to claim 1, wherein the convex portion is an inner or outer peripheral surface of the bracket.
Is a linear rib protruding radially on the inner peripheral surface of the yoke.
The bearing structure according to claim 1 .
部の組合せにより構成された請求項１〜２のいずれかに
記載の軸受構造体。 5. The convex part according to claim 4, wherein
3. A method according to claim 1, wherein said combination is composed of a combination of parts.
A bearing structure as described .
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11757996A JP3309707B2 (en) | 1996-05-13 | 1996-05-13 | Bearing structure |
| CN97113229A CN1088163C (en) | 1996-05-13 | 1997-05-13 | Bearing structural body |
| SG1997001545A SG60066A1 (en) | 1996-05-13 | 1997-05-13 | Bearing structural body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11757996A JP3309707B2 (en) | 1996-05-13 | 1996-05-13 | Bearing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09303408A JPH09303408A (en) | 1997-11-25 |
| JP3309707B2 true JP3309707B2 (en) | 2002-07-29 |
Family
ID=14715321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11757996A Expired - Fee Related JP3309707B2 (en) | 1996-05-13 | 1996-05-13 | Bearing structure |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3309707B2 (en) |
| CN (1) | CN1088163C (en) |
| SG (1) | SG60066A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002017063A (en) * | 2000-06-29 | 2002-01-18 | Minebea Co Ltd | Motor and manufacturing method |
| JP2004183875A (en) * | 2002-12-06 | 2004-07-02 | Toyoda Iron Works Co Ltd | Resin rotary member |
| JP2007187282A (en) * | 2006-01-16 | 2007-07-26 | Johnan Seisakusho Co Ltd | Press fit structure for fitting body |
| JP5379063B2 (en) * | 2010-04-05 | 2013-12-25 | 株式会社デンソー | Throttle device |
| JP5804269B2 (en) * | 2012-01-20 | 2015-11-04 | 日本電産株式会社 | motor |
| JP5765671B2 (en) * | 2012-01-20 | 2015-08-19 | 日本電産株式会社 | motor |
| JP5821753B2 (en) | 2012-04-02 | 2015-11-24 | コニカミノルタ株式会社 | Bearing member mounting structure, fixing device, and image forming apparatus |
| JP2018074685A (en) * | 2016-10-26 | 2018-05-10 | マブチモーター株式会社 | Brushless motor |
| JP6878986B2 (en) * | 2017-03-24 | 2021-06-02 | 日本電産株式会社 | Stator unit, motor, and fan motor |
| DE102017211792A1 (en) * | 2017-07-10 | 2019-01-10 | Aktiebolaget Skf | Method for fixing a bearing carrier and arrangement |
| JP7489185B2 (en) * | 2019-11-29 | 2024-05-23 | トヨタ紡織株式会社 | Press-fit collar structure |
| CN113070832B (en) * | 2020-01-06 | 2022-08-02 | 陈哲豪 | Magnetic sleeve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2522984Y2 (en) * | 1990-07-13 | 1997-01-22 | 株式会社三ツ葉電機製作所 | Bearing structure of wiper arm |
| DE4209579A1 (en) * | 1992-03-25 | 1993-09-30 | Vdo Schindling | Bearing for pump rotor drive shaft - has plastics bearing bush with slightly smaller cross-section than associated surrounding cast recess in metal bearing plate. |
-
1996
- 1996-05-13 JP JP11757996A patent/JP3309707B2/en not_active Expired - Fee Related
-
1997
- 1997-05-13 SG SG1997001545A patent/SG60066A1/en unknown
- 1997-05-13 CN CN97113229A patent/CN1088163C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| SG60066A1 (en) | 1999-02-22 |
| CN1168451A (en) | 1997-12-24 |
| CN1088163C (en) | 2002-07-24 |
| JPH09303408A (en) | 1997-11-25 |
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