JPH07243449A - Bearing device - Google Patents
Bearing deviceInfo
- Publication number
- JPH07243449A JPH07243449A JP6452094A JP6452094A JPH07243449A JP H07243449 A JPH07243449 A JP H07243449A JP 6452094 A JP6452094 A JP 6452094A JP 6452094 A JP6452094 A JP 6452094A JP H07243449 A JPH07243449 A JP H07243449A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- bearing
- impregnated
- impregnated bearing
- bearing holder
- 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
- 230000002093 peripheral effect Effects 0.000 claims abstract description 23
- 230000008602 contraction Effects 0.000 abstract description 3
- 238000012805 post-processing Methods 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 description 4
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、含油軸受を用いた軸受
装置に関するもので、モータのロータや歯車等の軸受装
置として適用可能なものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing device using an oil-impregnated bearing, and is applicable as a bearing device for a motor rotor, gears, and the like.
【０００２】[0002]
【従来の技術】含油軸受を用いた軸受装置は、一般に、
２個の含油軸受を軸受ホルダーの両端部に単独で圧入
し、２個の含油軸受の軸孔で回転軸を摺動可能（回転可
能）に支持するようになっている。しかし、２個の含油
軸受を軸受ホルダーにそれぞれ単独で圧入すると、圧入
による含油軸受内径の収縮と軸受ハウジング内径の芯ず
れ等によって２個の含油軸受双方の内径の芯ずれが生じ
る。そこで、２個の含油軸受を軸受ホルダーに組み込ん
だ後、２個の含油軸受の内径を同時にサイジングしある
いは切削加工による仕上げ加工を施して上記芯ずれを矯
正している。2. Description of the Related Art Bearing devices using oil-impregnated bearings are generally
The two oil-impregnated bearings are individually press-fitted into both ends of the bearing holder, and the rotary shaft is slidably (rotatably) supported by the shaft holes of the two oil-impregnated bearings. However, when the two oil-impregnated bearings are individually press-fitted into the bearing holder, the inner diameters of both the oil-impregnated bearings are decentered due to the shrinkage of the oil-impregnated bearing inner diameter and the misalignment of the bearing housing inner diameter due to the press-fitting. Therefore, after incorporating two oil-impregnated bearings into the bearing holder, the inner diameters of the two oil-impregnated bearings are simultaneously sized or subjected to finishing processing by cutting to correct the misalignment.
【０００３】また、含油軸受を軸受ホルダーに圧入しあ
るいは軸受ホルダーをかしめて固定したとき、含油軸受
の内径が縮小しないように、含油軸受の横断面外径を多
角形とし、含油軸受を軸受ホルダーに圧入、かしめ等に
より固着したときの軸受ホルダーおよび含油軸受の変形
を軸受ホルダーと含油軸受との間にできる隙間に逃し、
含油軸受の内径の縮小変形を小さくするようにしたもの
もある。実開平３−２８３２２号公報記載のものがそれ
である。Further, in order to prevent the inner diameter of the oil-impregnated bearing from being reduced when the oil-impregnated bearing is press-fitted into the bearing holder or fixed by caulking the bearing holder, the oil-impregnated bearing has a polygonal outer cross-sectional outer diameter and the oil-impregnated bearing is held in the bearing holder. Release the deformation of the bearing holder and the oil-impregnated bearing when they are fixed by press fitting or caulking into the gap created between the bearing holder and the oil-impregnated bearing,
There is also an oil-impregnated bearing which is designed to reduce the reduction deformation of the inner diameter. That is what is described in Japanese Utility Model Laid-Open No. 28322/1993.
【０００４】[0004]
【発明が解決しようとする課題】含油軸受を用いた従来
一般の軸受装置のように、２個の含油軸受を軸受ホルダ
ーに単独で圧入したものによれば、前述のように含油軸
受を軸受ホルダーに圧入したあと含油軸受の軸孔を再度
加工して仕上げる必要があるが、含油軸受を軸受ホルダ
ーに組み込んだあとの加工は精度を出しにくいこともあ
って軸孔の周面を損傷することが多く、歩留まりがよく
ないし、加工工程が１工程増える難点もある。When two oil-impregnated bearings are individually press-fitted into the bearing holder like the conventional general bearing device using the oil-impregnated bearing, as described above, the oil-impregnated bearing is attached to the bearing holder. It is necessary to process the shaft hole of the oil-impregnated bearing again after finishing press-fitting into the bearing, but machining after the oil-impregnated bearing is incorporated into the bearing holder is difficult to obtain accuracy, and the peripheral surface of the shaft hole may be damaged. In many cases, the yield is not good, and there is a drawback that the number of processing steps is increased by one.
【０００５】また、上記公報記載のものによれば、含油
軸受を軸受ホルダーに組み込んだ状態での含油軸受の内
径の縮小変形が従来一般のものに比べて小さくなるとい
う利点はあるものの、圧入やかしめ等によって含油軸受
を軸受ホルダーに固着する以上、含油軸受の回転軸との
摺動面の縮小変形が皆無とはいえず、回転軸の摺動が不
円滑になるという問題は残っている。Further, according to the one described in the above publication, although there is an advantage that the reduction deformation of the inner diameter of the oil-impregnated bearing in the state where the oil-impregnated bearing is incorporated in the bearing holder is smaller than that of the conventional general one, press-fitting or As long as the oil-impregnated bearing is fixed to the bearing holder by caulking or the like, it cannot be said that the sliding surface of the oil-impregnated bearing with respect to the rotary shaft is reduced and deformed, and the problem that the sliding of the rotary shaft becomes unsatisfactory remains.
【０００６】本発明は、このような従来技術の問題点を
解消するためになされたもので、含油軸受を軸受ホルダ
ーに圧入等によって固着した状態で、含油軸受の回転軸
との摺動面の縮小変形がなく、摺動面の面精度および同
芯度が共に良好で、後加工を必要としない軸受装置を提
供することを目的とする。The present invention has been made in order to solve the above problems of the prior art. In the state where the oil-impregnated bearing is fixed to the bearing holder by press fitting or the like, the sliding surface of the oil-impregnated bearing with respect to the rotating shaft is fixed. An object of the present invention is to provide a bearing device which does not undergo contraction deformation, has good surface accuracy and concentricity of a sliding surface, and does not require post-processing.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、請求項１記載の発明は、含油軸受の軸孔の一端部
と他端部を中間部よりも小径に形成してこれを回転軸の
摺動面とし、含油軸受の中間部外周を軸受ホルダーの内
孔に圧入当接させたことを特徴とする。請求項２記載の
発明は、含油軸受の軸孔の一端部に対応する外周部を他
の部分の外周部よりも小径にし、この小径部分を軸受ホ
ルダーの内孔から離間させたことを特徴とする。請求項
３記載の発明は、軸受ホルダーの内孔に複数のリブを形
成し、このリブに含油軸受の外径部を圧入当接させたこ
とを特徴とする。In order to achieve the above object, the invention according to claim 1 forms one end and the other end of a shaft hole of an oil-impregnated bearing with a diameter smaller than that of an intermediate portion. The sliding surface of the rotating shaft is characterized in that the outer circumference of the intermediate portion of the oil-impregnated bearing is press-fitted into contact with the inner hole of the bearing holder. The invention according to claim 2 is characterized in that the outer peripheral portion corresponding to one end portion of the shaft hole of the oil-impregnated bearing has a smaller diameter than the outer peripheral portions of other portions, and the small diameter portion is separated from the inner hole of the bearing holder. To do. The invention according to claim 3 is characterized in that a plurality of ribs are formed in the inner hole of the bearing holder, and the outer diameter portion of the oil-impregnated bearing is press-fitted into contact with the ribs.
【０００８】[0008]
【作用】請求項１記載の発明によれば、含油軸受の軸孔
の一端部と他端部の各小径部で回転軸が摺動可能に支持
される。含油軸受はその中間部外周が軸受ホルダーの内
孔に圧入当接される。このとき含油軸受の中間部が縮小
変形しても、含油軸受の軸孔の中間部は回転軸との摺動
面ではないため、回転軸の支持には何ら影響はなく、回
転軸との摺動面である軸孔の一端部と他端部の面精度、
同芯度は当初の精度に保たれる。請求項２記載の発明に
よれば、回転軸との摺動面に対応する含油軸受の外周部
が小径に形成されて軸受ホルダーの内孔から離間するた
め、含油軸受を軸受ホルダーに圧入当接させた状態で含
油軸受の回転軸との摺動面が縮小変形することはない。
請求項３記載の発明によれば、軸受ホルダーの内孔に形
成した複数のリブにより含油軸受と軸受ホルダーとが限
られた面積で当接する。According to the first aspect of the invention, the rotary shaft is slidably supported by the small diameter portions at one end and the other end of the shaft hole of the oil-impregnated bearing. The oil-impregnated bearing has the outer periphery of the intermediate portion press-fitted into the inner hole of the bearing holder. At this time, even if the intermediate part of the oil-impregnated bearing is contracted and deformed, the intermediate part of the shaft hole of the oil-impregnated bearing is not a sliding surface with the rotating shaft, so there is no effect on the support of the rotating shaft and there is no sliding contact with the rotating shaft. Surface accuracy of one end and the other end of the shaft hole, which is the moving surface,
The concentricity is maintained at the original precision. According to the invention described in claim 2, since the outer peripheral portion of the oil-impregnated bearing corresponding to the sliding surface with respect to the rotary shaft is formed to have a small diameter and is separated from the inner hole of the bearing holder, the oil-impregnated bearing is press-fitted into the bearing holder. In this state, the sliding surface of the oil-impregnated bearing with respect to the rotary shaft does not contract and deform.
According to the third aspect of the invention, the oil-impregnated bearing and the bearing holder abut in a limited area by the plurality of ribs formed in the inner hole of the bearing holder.
【０００９】[0009]
【実施例】以下、図面を参照しながら本発明にかかる軸
受装置の実施例を説明する。図１ないし図３において、
符号１は含油軸受を示す。含油軸受１は外径が円筒状に
形成され、回転軸を回転可能にすなわち周方向に摺動可
能に支持する円筒形の軸孔を有している。含油軸受１は
従来一般の含油軸受２個分を一体に連結したのと同等の
形態になっている。従って、含油軸受１の軸方向の長さ
は、従来の軸受装置のように２個の含油軸受を軸受ホル
ダーで保持したものにおける２個の含油軸受相互間の寸
法に匹敵している。Embodiments of the bearing device according to the present invention will be described below with reference to the drawings. 1 to 3,
Reference numeral 1 indicates an oil-impregnated bearing. The oil-impregnated bearing 1 has a cylindrical outer diameter, and has a cylindrical shaft hole that rotatably supports the rotating shaft, that is, slidably in the circumferential direction. The oil-impregnated bearing 1 has the same form as two conventional oil-impregnated bearings are integrally connected. Therefore, the axial length of the oil-impregnated bearing 1 is comparable to the dimension between the two oil-impregnated bearings in the case where two oil-impregnated bearings are held by the bearing holder as in the conventional bearing device.
【００１０】含油軸受１の軸孔は、軸線方向一端部（図
１において下端部）１１と他端部１３とその中間部１２
に区分され、上記軸孔の一端部１１と他端部１３が中間
部１２よりも小径に形成され、この一端部１１と他端部
１３が回転軸との摺動面になっている。含油軸受１の外
周部は、上記軸孔の一端部１１に対応する部分、すなわ
ち図１において下端部が他の部分に対して小径部１４に
なっている。より詳細には、上記軸孔の一端部１１に対
応する範囲を含むと共にそれよりも広い範囲にわたって
上記小径部１４が形成されている。The shaft hole of the oil-impregnated bearing 1 includes one end portion (lower end portion in FIG. 1) 11 in the axial direction, the other end portion 13 and an intermediate portion 12 thereof.
The one end 11 and the other end 13 of the shaft hole are formed to have a smaller diameter than the intermediate part 12, and the one end 11 and the other end 13 are sliding surfaces with respect to the rotary shaft. The outer peripheral portion of the oil-impregnated bearing 1 has a portion corresponding to the one end portion 11 of the shaft hole, that is, the lower end portion in FIG. More specifically, the small-diameter portion 14 is formed over a wider range including a range corresponding to the one end 11 of the shaft hole.
【００１１】上記含油軸受１の中間部外周は軸受ホルダ
ー２の円筒状の内孔２１に圧入当接されている。軸受ホ
ルダー２は上記内孔２１を有する円筒状の部分と、この
円筒状の部分から外周方向に張り出したフランジ部２３
と、下端部に内向きのフランジ部２４を有する。また、
上記内孔２１の周壁には横断面が半円形の複数のリブ２
２が軸線方向に向けて、かつ円周方向に等間隔に形成さ
れている。従って、軸受ホルダー２の内孔２１に含油軸
受１の外径部を圧入当接させると、含油軸受１の外径部
は上記複数のリブ２２に圧入当接させられることにな
る。含油軸受１の一端（図１において下端）は軸受ホル
ダー２の内向きのフランジ部２４に当接させられてい
る。The outer periphery of the intermediate portion of the oil-impregnated bearing 1 is press-fitted into and contacted with the cylindrical inner hole 21 of the bearing holder 2. The bearing holder 2 has a cylindrical portion having the inner hole 21 and a flange portion 23 protruding from the cylindrical portion in the outer peripheral direction.
And has an inwardly facing flange portion 24 at the lower end portion. Also,
A plurality of ribs 2 having a semicircular cross section are formed on the peripheral wall of the inner hole 21.
2 are formed at equal intervals in the axial direction and in the circumferential direction. Therefore, when the outer diameter portion of the oil-impregnated bearing 1 is press-fitted against the inner hole 21 of the bearing holder 2, the outer diameter portion of the oil-impregnated bearing 1 is press-fitted and brought into contact with the plurality of ribs 22. One end (lower end in FIG. 1) of the oil-impregnated bearing 1 is brought into contact with the inward flange portion 24 of the bearing holder 2.
【００１２】軸受ホルダー２の円筒状の内孔２１の軸線
方向の寸法は、含油軸受１の一端（図１において下端）
から回転軸との摺動面をなす軸孔の他端部１３までの寸
法よりも短くなっている。従って、軸受ホルダー２のう
ち孔２１に含油軸受２を圧入当接させ、かつ、含油軸受
１の一端を軸受ホルダー２の内向きのフランジ部２４に
当接させた状態では、含油軸受１の上端部が軸受ホルダ
ー２から突出し、含油軸受の軸孔の上記他端部１３が軸
受ホルダー２の上端よりも上方に位置している。また、
前述のように含油軸受１の外周部は、上記軸孔の一端部
１１に対応する部分が他の部分に対して小径部１４にな
っているため、この小径部１４と軸受ホルダー２の内孔
２１との間には隙間が生じ、上記小径部１４は軸受ホル
ダー２の内孔２１から離間している。しかも、上記一端
部１１に対応する範囲よりも広い範囲にわたって小径部
１４が形成されているため、軸受ホルダー２に対する含
油軸受１の圧入範囲は、図１に示すように含油軸受１の
軸孔の中間部１２に対応する範囲内に制限されている。The axial dimension of the cylindrical inner hole 21 of the bearing holder 2 is one end (lower end in FIG. 1) of the oil-impregnated bearing 1.
To the other end 13 of the shaft hole that forms a sliding surface with the rotating shaft. Therefore, in the state where the oil-impregnated bearing 2 is press-fitted into the hole 21 of the bearing holder 2 and one end of the oil-impregnated bearing 1 is in contact with the inward flange portion 24 of the bearing holder 2, the upper end of the oil-impregnated bearing 1 is pressed. The portion projects from the bearing holder 2, and the other end 13 of the shaft hole of the oil-impregnated bearing is located above the upper end of the bearing holder 2. Also,
As described above, in the outer peripheral portion of the oil-impregnated bearing 1, the portion corresponding to the one end portion 11 of the shaft hole is the small diameter portion 14 with respect to the other portions, so that the small diameter portion 14 and the inner hole of the bearing holder 2 are formed. A gap is created between the small diameter portion 14 and the inner diameter 21 of the bearing holder 2. Moreover, since the small diameter portion 14 is formed over a range wider than the range corresponding to the one end portion 11, the press-fitting range of the oil-impregnated bearing 1 into the bearing holder 2 is, as shown in FIG. It is limited within the range corresponding to the intermediate portion 12.
【００１３】以上説明した軸受装置をモータに適用した
例を図４に示す。図４において、軸受ホルダー２の下端
部は基板８に形成された孔に挿入され、軸受ホルダー２
のフランジ部２３が基板８の上に重なっている。軸受ホ
ルダー２の上端部外周側にはステータコア６の中心孔が
嵌められ、ステータコア６の内周縁部が上記フランジ部
２３の上に重なっている。ステータコア６、上記フラン
ジ部２３を貫いたボルト３０が基板８に捩じ込まれるこ
とにより、ステータコア６、軸受ホルダー２が基板８に
固定されている。ステータコア６は適宜数の突極を放射
状に有し、各突極には駆動コイル７が巻かれている。軸
受ホルダー２の内孔２１には含油軸受１が圧入されてい
る。軸受ホルダー２と含油軸受１は、既に説明した図１
と同様の軸受装置を構成している。An example in which the bearing device described above is applied to a motor is shown in FIG. In FIG. 4, the lower end portion of the bearing holder 2 is inserted into the hole formed in the substrate 8 and
The flange portion 23 of is overlapped on the substrate 8. The center hole of the stator core 6 is fitted on the outer peripheral side of the upper end portion of the bearing holder 2, and the inner peripheral edge portion of the stator core 6 overlaps the flange portion 23. The stator core 6 and the bearing holder 2 are fixed to the substrate 8 by screwing the bolt 30 that penetrates the stator core 6 and the flange portion 23 into the substrate 8. The stator core 6 has an appropriate number of salient poles radially, and a drive coil 7 is wound around each salient pole. The oil-impregnated bearing 1 is press-fitted into the inner hole 21 of the bearing holder 2. The bearing holder 2 and the oil-impregnated bearing 1 are shown in FIG.
The same bearing device is constructed.
【００１４】上記含油軸受１の軸孔には回転軸３が挿入
されている。含油軸受１の軸孔は前述のように軸方向中
間部１２よりも一端部１１と他端部１３が小径に形成さ
れて摺動面となっており、この一端部１１と他端部１３
の摺動面に回転軸が摺接している。含油軸受１の上端か
ら僅かに突出した回転軸３の上端部には有底円筒状のロ
ータケース４の底部中心部が固着されている。ロータケ
ース４の周壁はステータコア６を取り囲んでおり、ロー
タケース４の周壁内周面に固着されたロータマグネット
５の内周面がステータコア６の各突極の外周面に対し適
宜の間隙をおいて対向している。従って、周知のとお
り、ロータマグネット５の回転位置に応じて各駆動コイ
ル７への通電を切換制御することにより、回転軸３、ロ
ータケース４、ロータマグネット５からなる回転部分を
回転駆動することができる。A rotary shaft 3 is inserted into the shaft hole of the oil-impregnated bearing 1. As described above, the shaft hole of the oil-impregnated bearing 1 is formed as a sliding surface by forming one end 11 and the other end 13 with a smaller diameter than the axial intermediate part 12, and the one end 11 and the other end 13 are formed.
The rotating shaft is in sliding contact with the sliding surface of. At the upper end of the rotary shaft 3 that slightly protrudes from the upper end of the oil-impregnated bearing 1, the bottom center of a bottomed cylindrical rotor case 4 is fixed. The peripheral wall of the rotor case 4 surrounds the stator core 6, and the inner peripheral surface of the rotor magnet 5 fixed to the inner peripheral surface of the peripheral wall of the rotor case 4 has an appropriate gap from the outer peripheral surface of each salient pole of the stator core 6. Facing each other. Therefore, as is well known, by rotating and controlling the energization of each drive coil 7 in accordance with the rotational position of the rotor magnet 5, the rotating portion including the rotary shaft 3, the rotor case 4, and the rotor magnet 5 can be rotationally driven. it can.
【００１５】以上説明した実施例によれば、含油軸受１
の軸孔の一端部１１と他端部１３の径を中間部１２の径
よりも小径に形成してこれを回転軸３の摺動面とし、含
油軸受１の中間部外周を軸受ホルダー２の内孔２１に圧
入当接させたため、圧入当接によって含油軸受１の中間
部１２が縮小変形しても、この中間部１２は回転軸３と
の摺動面ではないため、回転軸３の支持には何ら影響は
なく、回転軸３との摺動面である軸孔の一端部１１と他
端部１３の面精度、同芯度は当初の部品の状態での精度
に保たれる。従って、含油軸受１を軸受ホルダー２に組
み込んだ後で面精度、同芯度を出すための仕上げ加工を
する必要もなくなる。また、含油軸受１は１個で足り、
含油軸受１の軸孔の一端部１１と他端部１３の２ヵ所で
回転軸３を回転可能に支持するため、回転軸３を安定に
支持することができる。According to the embodiment described above, the oil-impregnated bearing 1
The one end 11 and the other end 13 of the shaft hole are formed to have a diameter smaller than the diameter of the intermediate portion 12, and this is used as the sliding surface of the rotary shaft 3, and the outer circumference of the intermediate portion of the oil-impregnated bearing 1 is set to the bearing holder 2. Since the intermediate portion 12 of the oil-impregnated bearing 1 is contracted and deformed due to the press-fitting contact, the intermediate portion 12 is not a sliding surface with the rotary shaft 3, and therefore the rotary shaft 3 is supported. The surface accuracy and concentricity of the one end 11 and the other end 13 of the shaft hole, which is the sliding surface with respect to the rotary shaft 3, are maintained at the accuracy in the initial state of the component. Therefore, it is not necessary to finish the oil-impregnated bearing 1 after incorporating it into the bearing holder 2 to obtain surface accuracy and concentricity. Also, one oil-impregnated bearing 1 is sufficient,
Since the rotary shaft 3 is rotatably supported at two positions, one end 11 and the other end 13 of the shaft hole of the oil-impregnated bearing 1, the rotary shaft 3 can be stably supported.
【００１６】さらに、含油軸受１の軸孔の回転軸３との
摺動面をなす一端部１１に対応する含油軸受１の外周部
が小径部１４となっていて軸受ホルダー２の内孔２１か
ら離間しているため、含油軸受１を軸受ホルダー２に圧
入当接させた状態で含油軸受１の回転軸３との摺動面を
なす上記一端部１１が縮小変形することはなく、この点
からも回転軸３との摺動面の面精度、同芯度が当初の部
品の状態での精度に保たれる。Further, the outer peripheral portion of the oil-impregnated bearing 1 corresponding to one end 11 forming the sliding surface of the shaft hole of the oil-impregnated bearing 1 with the rotary shaft 3 is a small diameter portion 14 from the inner hole 21 of the bearing holder 2. Since the oil-impregnated bearing 1 is pressed into contact with the bearing holder 2, the one end 11 forming the sliding surface of the oil-impregnated bearing 1 with the rotary shaft 3 does not contract and deform because the oil-impregnated bearing 1 is pressed into contact with the bearing holder 2. Also, the surface accuracy and concentricity of the sliding surface with respect to the rotating shaft 3 are maintained at the accuracy in the initial state of the parts.
【００１７】また、軸受ホルダー２の内孔２１に複数の
リブ２２を形成し、このリブ２２に含油軸受１の外径部
を圧入当接させたため、軸受ホルダー２への含油軸受１
の圧入当接が容易であると共に、圧入当接に伴う含油軸
受１の変形が含油軸受１と軸受ホルダー２との間の隙間
に逃げ、含油軸受１の軸孔の縮小変形を無くすことがで
きる。軸受ホルダー２が樹脂製の場合、上記複数のリブ
２２がないとすれば、軸受ホルダー２の内孔２１に含油
軸受１を圧入当接させると軸受ホルダーが割れやすい
が、上記のように軸受ホルダー２の内孔２１に形成した
複数のリブ２２に含油軸受１の外径部を圧入当接させる
ようにしたものによれば、圧入当接に伴う含油軸受１の
変形が含油軸受１と軸受ホルダー２との間の隙間に逃げ
るため、軸受ホルダー２が樹脂製であったとしても割れ
ることはなくなる。Further, since a plurality of ribs 22 are formed in the inner hole 21 of the bearing holder 2 and the outer diameter portion of the oil-impregnated bearing 1 is press-contacted to the ribs 22, the oil-impregnated bearing 1 to the bearing holder 2 is formed.
Of the oil-impregnated bearing 1 escapes into the gap between the oil-impregnated bearing 1 and the bearing holder 2, and the reduction deformation of the shaft hole of the oil-impregnated bearing 1 can be eliminated. . When the bearing holder 2 is made of resin, if the plurality of ribs 22 are not provided, the bearing holder is easily cracked when the oil-impregnated bearing 1 is press-fitted and brought into contact with the inner hole 21 of the bearing holder 2, but as described above, According to the structure in which the outer diameter portion of the oil-impregnated bearing 1 is press-fitted against a plurality of ribs 22 formed in the inner hole 21 of the second oil-impregnated bearing 1, the deformation of the oil-impregnated bearing 1 caused by the press-fitting abutment causes the oil-impregnated bearing 1 and the bearing holder. Even if the bearing holder 2 is made of resin, it does not crack because it escapes into the gap between the bearing holder 2 and the bearing holder 2.
【００１８】なお、図示の実施例では含油軸受１の軸孔
の一端部に対応する外周部のみを他の部分の外周部より
も小径にしていたが、上記軸孔の他端部に対応する外周
部分も小径にしてもよい。本発明にかかる軸受装置は、
モータの軸受装置に限らず、歯車の軸受装置その他各種
回転体の軸受装置として適用することができる。In the illustrated embodiment, only the outer peripheral portion corresponding to one end portion of the shaft hole of the oil-impregnated bearing 1 has a smaller diameter than the outer peripheral portions of the other portions, but it corresponds to the other end portion of the shaft hole. The outer peripheral portion may also have a small diameter. The bearing device according to the present invention is
The present invention can be applied not only to a bearing device for a motor but also as a bearing device for a gear and a bearing device for various rotating bodies.
【００１９】[0019]
【発明の効果】請求項１記載の発明によれば、含油軸受
の軸孔の一端部と他端部の径を中間部の径よりも小径に
形成してこれを回転軸との摺動面とし、含油軸受の中間
部外周を軸受ホルダーの内孔に圧入当接させたため、圧
入当接によって含油軸受の中間部が縮小変形しても、こ
の中間部は回転軸との摺動面ではないことから、回転軸
の支持には何ら影響はなく、回転軸との摺動面である軸
孔の一端部と他端部の面精度、同芯度は当初の部品の状
態での精度に保たれる。従って、含油軸受を軸受ホルダ
ーに組み込んだ後で面精度、同芯度を出すための仕上げ
加工をする必要もなくなる。According to the first aspect of the invention, the diameter of one end and the other end of the shaft hole of the oil-impregnated bearing is formed to be smaller than the diameter of the intermediate part, and this is a sliding surface with the rotary shaft. Since the outer periphery of the oil-impregnated bearing is pressed into contact with the inner hole of the bearing holder, even if the intermediate part of the oil-impregnated bearing contracts due to press-fit contact, this intermediate part is not a sliding surface with the rotating shaft. Therefore, there is no effect on the support of the rotary shaft, and the surface accuracy and concentricity of the one end and the other end of the shaft hole, which is the sliding surface with the rotary shaft, are maintained at the accuracy of the original parts. Be drunk Therefore, it is not necessary to finish the oil-impregnated bearing into the bearing holder to obtain surface accuracy and concentricity.
【００２０】請求項２記載の発明によれば、含油軸受の
軸孔の回転軸との摺動面をなす一端部に対応する含油軸
受の外周部が小径になっていて軸受ホルダーの内孔から
離間しているため、含油軸受を軸受ホルダーに圧入当接
させた状態で含油軸受の回転軸との摺動面をなす上記一
端部が縮小変形することはなく、この点からも回転軸と
の摺動面の面精度、同芯度が当初の部品の状態での精度
に保たれる利点がある。According to the second aspect of the invention, the outer diameter of the oil-impregnated bearing, which corresponds to one end forming a sliding surface of the shaft hole of the oil-impregnated bearing with respect to the rotary shaft, has a small diameter from the inner hole of the bearing holder. Since they are separated from each other, the one end that forms the sliding surface with the rotating shaft of the oil-impregnated bearing does not shrink and deform in the state where the oil-impregnated bearing is press-fitted into contact with the bearing holder. There is an advantage that the surface accuracy and concentricity of the sliding surface can be maintained to the accuracy in the initial state of the parts.
【００２１】請求項３記載の発明によれば、軸受ホルダ
ーの内孔に複数のリブを形成し、このリブに含油軸受の
外径部を圧入当接させたため、軸受ホルダーへの含油軸
受の圧入当接が容易であると共に、圧入当接に伴う含油
軸受の変形が含油軸受と軸受ホルダーとの間の隙間に逃
げ、含油軸受の軸孔の縮小変形を無くすことができる。According to the third aspect of the present invention, a plurality of ribs are formed in the inner hole of the bearing holder, and the outer diameter portion of the oil-impregnated bearing is press-fitted against the ribs, so that the oil-impregnated bearing is press-fitted into the bearing holder. The contact is easy, and the deformation of the oil-impregnated bearing due to the press-fit contact is released into the gap between the oil-impregnated bearing and the bearing holder, so that the contraction deformation of the shaft hole of the oil-impregnated bearing can be eliminated.
【図１】本発明にかかる軸受装置の実施例を示す縦断面
図。FIG. 1 is a vertical sectional view showing an embodiment of a bearing device according to the present invention.
【図２】同上平面図。FIG. 2 is a plan view of the same.
【図３】上記実施例中の含油軸受の縦断面図。FIG. 3 is a vertical cross-sectional view of the oil-impregnated bearing in the above embodiment.
【図４】上記実施例にかかる含油軸受を用いたモータの
例を示す縦断面図。FIG. 4 is a vertical cross-sectional view showing an example of a motor using the oil-impregnated bearing according to the above embodiment.
１ 含油軸受 ２ 軸受ホルダー ３ 回転軸 １１ 軸孔の一端部 １２ 軸孔の中間部 １３ 軸孔の他端部 １４ 小径部 ２２ リブ 1 Oil-impregnated bearing 2 Bearing holder 3 Rotating shaft 11 One end of shaft hole 12 Intermediate part of shaft hole 13 Other end of shaft hole 14 Small diameter part 22 Rib
Claims (3)
された円筒状の含油軸受と、この含油軸受が内孔に圧入
された軸受ホルダーとを有してなる軸受装置であって、 上記含油軸受は、軸孔の一端部と他端部が中間部よりも
小径に形成されて上記回転軸の摺動面となっており、 上記含油軸受の中間部外周が上記軸受ホルダーの内孔に
圧入当接されていることを特徴とする軸受装置。1. A bearing device comprising a cylindrical oil-impregnated bearing in which a shaft hole for slidably supporting a rotary shaft is formed, and a bearing holder in which the oil-impregnated bearing is press-fitted into an inner hole. In the oil-impregnated bearing, one end portion and the other end portion of the shaft hole are formed to have a smaller diameter than the intermediate portion to form a sliding surface of the rotary shaft, and the outer periphery of the intermediate portion of the oil-impregnated bearing is inside the bearing holder. A bearing device characterized by being press-fitted into contact with a hole.
る外周部が他の部分の外周部よりも小径になっており、
この小径部分が軸受ホルダーの内孔から離間しているこ
とを特徴とする請求項１記載の軸受装置。2. The oil-impregnated bearing has an outer peripheral portion corresponding to one end of the shaft hole having a smaller diameter than outer peripheral portions of other portions,
The bearing device according to claim 1, wherein the small diameter portion is separated from the inner hole of the bearing holder.
成され、このリブに含油軸受の外径部が圧入当接してい
ることを特徴とする請求項１又は２記載の軸受装置。3. The bearing device according to claim 1, wherein a plurality of ribs are formed in the inner hole of the bearing holder, and the outer diameter portion of the oil-impregnated bearing is press-fitted into contact with the ribs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6452094A JPH07243449A (en) | 1994-03-08 | 1994-03-08 | Bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6452094A JPH07243449A (en) | 1994-03-08 | 1994-03-08 | Bearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07243449A true JPH07243449A (en) | 1995-09-19 |
Family
ID=13260582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6452094A Pending JPH07243449A (en) | 1994-03-08 | 1994-03-08 | Bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07243449A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6082903A (en) * | 1997-11-25 | 2000-07-04 | Matsushita Electric Industrial Co., Ltd. | Bearing device comprising a slide member, and a holding member both made of porous sintered metal impregnated with lubricating oil |
| EP1168577A2 (en) * | 2000-06-29 | 2002-01-02 | Minebea Co., Ltd. | Motor and method of manufacturing the same |
| US20110050050A1 (en) * | 2009-08-28 | 2011-03-03 | Lg Innotek Co., Ltd. | Bearing structure and spindle motor having the same |
| US8449191B2 (en) | 2008-08-29 | 2013-05-28 | Nidec Corporation | Bearing structure, motor, and fan apparatus |
| JP2017109698A (en) * | 2015-12-18 | 2017-06-22 | シロキ工業株式会社 | Clutch unit for vehicle |
-
1994
- 1994-03-08 JP JP6452094A patent/JPH07243449A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6082903A (en) * | 1997-11-25 | 2000-07-04 | Matsushita Electric Industrial Co., Ltd. | Bearing device comprising a slide member, and a holding member both made of porous sintered metal impregnated with lubricating oil |
| EP1168577A2 (en) * | 2000-06-29 | 2002-01-02 | Minebea Co., Ltd. | Motor and method of manufacturing the same |
| EP1168577A3 (en) * | 2000-06-29 | 2004-03-17 | Minebea Co., Ltd. | Motor and method of manufacturing the same |
| US8449191B2 (en) | 2008-08-29 | 2013-05-28 | Nidec Corporation | Bearing structure, motor, and fan apparatus |
| US20110050050A1 (en) * | 2009-08-28 | 2011-03-03 | Lg Innotek Co., Ltd. | Bearing structure and spindle motor having the same |
| US8587171B2 (en) * | 2009-08-28 | 2013-11-19 | Lg Innotek Co., Ltd. | Bearing structure and spindle motor having the same |
| JP2017109698A (en) * | 2015-12-18 | 2017-06-22 | シロキ工業株式会社 | Clutch unit for vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20060186753A1 (en) | Stator and electric motor having the same | |
| EP1717930A2 (en) | Electric actuator and a motor used therein | |
| JP3607511B2 (en) | Rotor and rotor assembling method and motor using the rotor | |
| JP3309707B2 (en) | Bearing structure | |
| JPH07243449A (en) | Bearing device | |
| JP2001317545A (en) | Dynamic pressure bearing device and method for manufacturing thereof | |
| JP2009183058A (en) | Method for securing stator core, and brushless motor | |
| JP6916501B2 (en) | Resolver rotor fixed structure, resolver, and motor | |
| JP5158845B2 (en) | Brushless motor | |
| JP3356925B2 (en) | Mounting method of plain bearing | |
| JP3207764B2 (en) | Motor manufacturing method | |
| JPH07296502A (en) | Shaft for spindle motor and its production and spindle motor formed by using the same | |
| JP2004080950A (en) | Armature of dynamo-electric machine | |
| JP4110605B2 (en) | motor | |
| JP3698504B2 (en) | motor | |
| KR102640810B1 (en) | Motor | |
| JP2999581B2 (en) | Spindle motor | |
| JPH06225506A (en) | Assembly method of electric motor | |
| JPH07236249A (en) | Spindle motor | |
| JPS6237410Y2 (en) | ||
| JP2600602Y2 (en) | Rotor | |
| JP2544299Y2 (en) | Mounting structure of rotation transmission body | |
| KR20220022756A (en) | Motor | |
| JP3026117B2 (en) | Rotating machine | |
| JPH0628343U (en) | Resin bearing device |