JP3879451B2 - Electric motor - Google Patents

Electric motor Download PDF

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Publication number
JP3879451B2
JP3879451B2 JP2001221113A JP2001221113A JP3879451B2 JP 3879451 B2 JP3879451 B2 JP 3879451B2 JP 2001221113 A JP2001221113 A JP 2001221113A JP 2001221113 A JP2001221113 A JP 2001221113A JP 3879451 B2 JP3879451 B2 JP 3879451B2
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JP
Japan
Prior art keywords
bearing holder
bearing
ball bearing
bracket
fixed
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 - Lifetime
Application number
JP2001221113A
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Japanese (ja)
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JP2003032958A (en
Inventor
伸二 山口
安司 越前
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Priority to JP2001221113A priority Critical patent/JP3879451B2/en
Publication of JP2003032958A publication Critical patent/JP2003032958A/en
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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
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • F16C25/08—Ball or roller bearings self-adjusting
    • F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
    • 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
    • F16C35/042—Housings for rolling element bearings for rotary movement
    • F16C35/045—Housings for rolling element bearings for rotary movement with a radial flange to mount the 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
    • 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
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/60—Positive connections with threaded parts, e.g. bolt and nut connections
    • 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
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Motor Or Generator Frames (AREA)
  • Reciprocating Pumps (AREA)
  • Support Of The Bearing (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、機器の駆動源となる電動機、特に回転軸にラジアル方向の負荷がかかる玉軸受のクリープ防止に関するものである。
【０００２】
【従来の技術】
従来、玉軸受を用いた電動機には、玉軸受の寿命を確保するため軸方向に適正な与圧をかけている。このため、外輪と軸受ハウジング（または内輪と回転軸）との間にわずかな隙間を設けてルーズにしていた。
【０００３】
そして、電動機の駆動時に出力軸にラジアル方向の負荷がかかると、外輪外径と軸受ハウジング内径（または内輪内径と回転軸外径）の寸法差からすべり現象が発生して摩耗が生じるためクリープ対策がとられていた。
【０００４】
一般的には、玉軸受の内輪と回転軸とを圧入嵌合、一方の玉軸受の外輪とハウジングとにわずかな隙間を設けて外輪をルーズにし、その外輪にバネで軸方向に与圧をかけていた。
【０００５】
【発明が解決しようとする課題】
しかしながら、従来のように内輪を回転軸に圧入または接着、片方の外輪をルーズにしたバネによる与圧構造では、玉軸受外輪を確実に固定するのが困難であり、完全にクリープを防止することができなかった。
【０００６】
そして、ダイアフラムポンプのように電動機にラジアル方向のアンバランス荷重が加わる用途に使用すると特にクリープが発生しやすかった。
【０００７】
また、両出力軸タイプの電動機において、両方の玉軸受外輪を軸受ハウジングに固定する構造にすると、玉軸受に与圧をかけることが困難であった。
【０００８】
そこで、内輪と回転軸との間に隙間を設ければ与圧をかけることは可能になるが、今度は玉軸受内輪と回転軸の間でクリープが発生することになり、玉軸受に与圧をかけるとクリープを避けることができなかった。
【０００９】
本発明は、上記従来の課題を解決するものであり、与圧をかけながら玉軸受のクリープを防止できる電動機を提供することを目的とする。
【００１０】
【課題を解決するための手段】
上記の課題を解決するために本発明の電動機は、回転軸を玉軸受で両持ち支承する電動機において、与圧をかけながら玉軸受の外輪と軸受ホルダをネジ固定するもので、玉軸受の外輪を挿入係止する軸受ホルダと、この軸受ホルダを取り付けるブラケットと、前記軸受ホルダの外周ツバ部の肉厚より厚いスペーサと、前記軸受ホルダとスペーサとの段差間に押圧配設するバネワッシャとを備え、玉軸受の内輪を回転軸に圧入、外輪はビスを介して軸受ホルダに固定、この軸受ホルダをブラケットに対して前記スペーサとバネワッシャとで軸方向に移動可能となるようにネジ固定したもので、玉軸受のクリープを防止できる。
【００１１】
【発明の実施の形態】
上記の課題を解決するために請求項１記載の電動機は、回転軸を玉軸受で両持ち支承する電動機において、玉軸受の外輪を挿入係止する軸受ホルダと、この軸受ホルダを取り付けるブラケットと、前記軸受ホルダの外周ツバ部の肉厚より厚いスペーサと、前記軸受ホルダとスペーサとの段差間に押圧配設するバネワッシャとを備え、玉軸受の内輪を回転軸に圧入、外輪はビスを介して軸受ホルダに固定、この軸受ホルダをブラケットに対して前記スペーサとバネワッシャとを介してビスで固定して、与圧をかけながら玉軸受の外輪と軸受ホルダをネジ固定したもので、クリープを防止できる。
【００１２】
また、請求項２記載の電動機は、内輪の圧入位置決めに回転軸の段部を利用したもので、玉軸受を軸方向に精度よく位置決めできる。
【００１３】
また、請求項３記載の電動機は、軸受ホルダを両側に設け、片方の軸受ホルダはスペーサとバネワッシャを用いずにブラケットにビスで固定したもので、軸受構造を共用でき、両方の玉軸受外輪をビスで固定できる。
【００１４】
【実施例】
以下、本発明の実施例について図面を参照して説明する。
【００１５】
（実施例１）
図１は玉軸受外輪の固定構造を示すものである。
【００１６】
図１（ａ）（ｂ）において、１１は軸受ホルダ、１２は玉軸受、１３は押え板、１４は止めネジ、１５はツバ部で、軸受ホルダ１１の外周に３ヶ所設けている。
【００１７】
そして、軸受ホルダ１１の内周にルーズな状態で玉軸受１２の外輪が挿入され、その外輪端面は押え板１３と接触するように軸受ホルダ１１端面より少し突出するように反対側の外輪端面を受けており、押え板１３を軸受ホルダ１１に止めネジ１４で固定して軸受ホルダ完成品となる。
【００１８】
次に、上述した軸受ホルダ完成品を用いた電動機の与圧構造を中心に説明する。
【００１９】
図２において、２１はブラケット、２２は巻線を備えたステータ、２３は回転軸でロータを備えている。２４はスペーサ、２５は波形のバネワッシャ、２６はネジである。また、図３は与圧構造の要部を説明する拡大図であり、３１はクリアランス、３２は隙間、３３は段差である。
【００２０】
まず、ステータ２２外周に両側からブラケット２１を取り付けておく。そして図１で説明した軸受ホルダ完成品の玉軸受１２内輪を回転軸２３の段部まで圧入、軸受ホルダ完成品のツバ部１５を一方のブラケット２１にネジ２６で３ヶ所固定する。さらに、もう一方の軸受ホルダ完成品の玉軸受１２内輪を回転軸２３の反対側の段部まで圧入する。
【００２１】
そして、取り付けた軸受ホルダ完成品を介して与圧をかけるために、軸受ホルダのツバ部１５の肉厚よりも厚いスペーサ２４とバネワッシャ２５を用いる。
【００２２】
ところで、軸受ホルダ１１とブラケット２１との挿入部にはラジアル方向にわずかなクリアランス３１を設けておく。また、内輪圧入後に軸受ホルダとブラケット２１には軸線方向に確実に隙間３２が得られるようにそれぞれ寸法設定している。
【００２３】
そして、ツバ部１５とスペーサ２４間の段差３３にバネワッシャ２５を配設、ネジ２６でツバ部１５をブラケット２１に固定する。
【００２４】
このバネワッシャ２５は押圧しないフリーの状態で段差３３よりも高く設定、ネジ２６はスペーサ２４の高さで制限された分だけしか締め付けられないので玉軸受に過度の与圧をかけることはない。また、この押圧状態で適正与圧になるようにバネ圧を設定している。
【００２５】
これにより、両玉軸受の内輪は回転軸に圧入固定、両玉軸受の外輪はネジ固定されるのでクリープが発生することはない。また、バネワッシャで適正な与圧をかけることができるので玉軸受の寿命を確保できる。
【００２６】
なお、軸受ホルダ完成品はバネワッシャ側の片方だけでもよく、その場合、反対側は軸受ホルダを一体化したブラケットにして、その玉軸受外輪を固着すればよい。
【００２７】
（実施例２）
実施例２は実施例１の電動機をダイアフラムポンプ駆動に応用した実施例である。
【００２８】
図４（ａ）（ｂ）において、４１はクランク支持体、４２はクランク軸、４３は軸受、４４はゴム製のダイアフラム、４５は吸気口、４６は排気口で、その先には逆流を防止する弁（図示せず）がある。
【００２９】
電動機の回転軸に固定されたクランク支持体４１は、クランク軸４２に固定された軸受４３の中心に対して偏芯した状態で取り付けており、電動機の回転軸が回転するとクランク軸４２は往復運動する。これによりクランク軸４２に取り付けたダイアフラム４４が往復運動して気体を吸気口４５から吸入して排気口４６から排出する。
【００３０】
このように、電動機は両玉軸受の内外輪を固定した状態で適正与圧をかけているので、回転軸に常時ラジアル方向のアンバランス荷重が加わるダイアフラムポンプに使用してもクリープを防止できる。
【００３１】
【発明の効果】
上記の実施例から明らかなように、請求項１記載の発明によれば、与圧をかけながら玉軸受の内輪および外輪を固定しているのでクリープを防止できる。
【００３２】
また、請求項２記載の発明によれば、上記請求項に加えて、玉軸受の位置決め精度確保が容易にできるため、適正与圧を確保しやすくなる。
【００３３】
また、請求項３記載の発明によれば、軸受構造を共用でき、両玉軸受の外輪をビスで確実に固定できるのでクリープを防止できる。
【００３４】
このように、両玉軸受の内輪および外輪を固定した状態で与圧をかけることができるので、クリープを防止した長寿命の電動機が得られる。
【図面の簡単な説明】
【図１】 （ａ）本発明の玉軸受外輪の固定構造を説明する断面図
（ｂ）本発明の玉軸受外輪の固定構造を説明する平面図
【図２】 本発明の実施例１における電動機の断面図
【図３】 本発明の実施例１における要部の拡大図
【図４】 （ａ）本発明の実施例２におけるダイアフラムポンプの説明図
（ｂ）本発明の実施例２におけるダイアフラムポンプと電動機の断面図
【符号の説明】
１１ 軸受ホルダ
１２ 玉軸受
１３ 押え板
１４ 止めネジ
１５ ツバ部
２１ ブラケット
２２ ステータ
２３ 回転軸
２４ スペーサ
２５ バネワッシャ
２６ ネジ
３２ 隙間
３３ 段差
４４ ダイアフラム[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the prevention of creep of an electric motor serving as a drive source for equipment, particularly a ball bearing in which a radial load is applied to a rotating shaft.
[0002]
[Prior art]
Conventionally, an appropriate pressure is applied to an electric motor using a ball bearing in the axial direction in order to ensure the life of the ball bearing. For this reason, a slight gap is provided between the outer ring and the bearing housing (or the inner ring and the rotating shaft) to make it loose.
[0003]
And when a radial load is applied to the output shaft when driving the motor, a slip phenomenon occurs due to the difference in the outer ring outer diameter and the bearing housing inner diameter (or inner ring inner diameter and rotating shaft outer diameter), which causes wear. Was taken.
[0004]
In general, the inner ring of a ball bearing and a rotating shaft are press-fitted and fitted, and a slight gap is provided between the outer ring and housing of one ball bearing to loosen the outer ring, and the outer ring is pressurized in the axial direction with a spring. It was over.
[0005]
[Problems to be solved by the invention]
However, it is difficult to securely fix the outer ring of the ball bearing, and the creep is completely prevented with the conventional pressurizing structure using the spring with the inner ring being press-fitted or bonded to the rotating shaft and one outer ring being loose. I could not.
[0006]
And, when used for an application in which an unbalanced load in the radial direction is applied to the electric motor, such as a diaphragm pump, creep is particularly likely to occur.
[0007]
In addition, in both output shaft type electric motors, it is difficult to apply pressure to the ball bearings if both ball bearing outer rings are structured to be fixed to the bearing housing.
[0008]
Therefore, if a gap is provided between the inner ring and the rotating shaft, it is possible to apply pressure, but this time, creep occurs between the inner ring of the ball bearing and the rotating shaft, and the pressure is applied to the ball bearing. I couldn't avoid creep.
[0009]
The present invention solves the above-described conventional problems, and an object of the present invention is to provide an electric motor that can prevent creep of a ball bearing while applying pressure.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, an electric motor according to the present invention is a motor in which a rotating shaft is supported at both ends by a ball bearing, and an outer ring of a ball bearing and a bearing holder are screw-fixed while applying pressure. A bearing holder that inserts and locks the bearing holder, a bracket that attaches the bearing holder, a spacer that is thicker than the thickness of the outer peripheral flange of the bearing holder, and a spring washer that is pressed between the steps of the bearing holder and the spacer. The inner ring of the ball bearing is press-fitted into the rotating shaft, the outer ring is fixed to the bearing holder via a screw, and this bearing holder is fixed to the bracket with screws so that it can be moved in the axial direction by the spacer and the spring washer. Can prevent the ball bearing from creeping.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In order to solve the above-mentioned problem, the electric motor according to claim 1 is a motor in which a rotating shaft is supported at both ends by a ball bearing, a bearing holder for inserting and locking an outer ring of the ball bearing, a bracket for attaching the bearing holder, A spacer thicker than the thickness of the outer peripheral flange of the bearing holder, and a spring washer that is pressed between the bearing holder and the spacer. The inner ring of the ball bearing is press-fitted into the rotating shaft, and the outer ring is inserted through a screw. Fixed to the bearing holder, this bearing holder is fixed to the bracket with screws via the spacer and the spring washer, and the outer ring of the ball bearing and the bearing holder are fixed with screws while applying pressure, so that creep can be prevented. .
[0012]
According to a second aspect of the present invention, the step of the rotating shaft is used for press-fitting positioning of the inner ring, and the ball bearing can be accurately positioned in the axial direction.
[0013]
Further, the electric motor according to claim 3 is provided with bearing holders on both sides, and one of the bearing holders is fixed to the bracket with screws without using a spacer and a spring washer. Can be fixed with screws.
[0014]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0015]
Example 1
FIG. 1 shows a ball bearing outer ring fixing structure.
[0016]
In FIGS. 1A and 1B, 11 is a bearing holder, 12 is a ball bearing, 13 is a retainer plate, 14 is a set screw, and 15 is a flange portion, and is provided at three locations on the outer periphery of the bearing holder 11.
[0017]
Then, the outer ring of the ball bearing 12 is inserted in a loose state on the inner periphery of the bearing holder 11, and the outer ring end surface on the opposite side is protruded slightly from the end surface of the bearing holder 11 so that the outer ring end surface contacts the presser plate 13. The holding plate 13 is fixed to the bearing holder 11 with a set screw 14 to obtain a finished bearing holder.
[0018]
Next, an explanation will be made focusing on the pressurizing structure of the electric motor using the above-described finished bearing holder.
[0019]
In FIG. 2, 21 is a bracket, 22 is a stator with windings, and 23 is a rotating shaft and a rotor. 24 is a spacer, 25 is a corrugated spring washer, and 26 is a screw. FIG. 3 is an enlarged view for explaining a main part of the pressurizing structure, in which 31 is a clearance, 32 is a gap, and 33 is a step.
[0020]
First, the bracket 21 is attached to the outer periphery of the stator 22 from both sides. Then, the inner ring of the ball bearing 12 of the completed bearing holder described in FIG. 1 is press-fitted to the step portion of the rotating shaft 23, and the flange portion 15 of the completed bearing holder is fixed to one bracket 21 with screws 26 at three locations. Further, the ball bearing 12 inner ring of the other completed bearing holder is press-fitted to the step on the opposite side of the rotating shaft 23.
[0021]
And in order to apply a pressure through the attached bearing holder finished product, a spacer 24 and a spring washer 25 that are thicker than the thickness of the flange 15 of the bearing holder are used.
[0022]
By the way, a slight clearance 31 is provided in the radial direction at the insertion portion between the bearing holder 11 and the bracket 21. The bearing holder and the bracket 21 are dimensioned so that a gap 32 is reliably obtained in the axial direction after the inner ring is press-fitted.
[0023]
Then, a spring washer 25 is provided at the step 33 between the flange portion 15 and the spacer 24, and the flange portion 15 is fixed to the bracket 21 with a screw 26.
[0024]
The spring washer 25 is set higher than the step 33 in a free state where it is not pressed, and the screw 26 is tightened only by the amount limited by the height of the spacer 24, so that no excessive pressure is applied to the ball bearing. Further, the spring pressure is set so that an appropriate pressure is obtained in this pressed state.
[0025]
As a result, the inner ring of both ball bearings is press-fitted and fixed to the rotating shaft, and the outer ring of both ball bearings is fixed by screws, so that creep does not occur. Further, since a proper pressure can be applied by the spring washer, the life of the ball bearing can be ensured.
[0026]
The finished bearing holder may be only one of the spring washer side. In this case, the opposite side may be a bracket integrated with the bearing holder, and the ball bearing outer ring may be fixed.
[0027]
(Example 2)
The second embodiment is an embodiment in which the electric motor of the first embodiment is applied to driving a diaphragm pump.
[0028]
4 (a) and 4 (b), 41 is a crank support body, 42 is a crankshaft, 43 is a bearing, 44 is a rubber diaphragm, 45 is an intake port, 46 is an exhaust port, and prevents backflow. There is a valve (not shown).
[0029]
The crank support 41 fixed to the rotating shaft of the electric motor is attached in an eccentric state with respect to the center of the bearing 43 fixed to the crank shaft 42. When the rotating shaft of the electric motor rotates, the crank shaft 42 reciprocates. To do. As a result, the diaphragm 44 attached to the crankshaft 42 reciprocates to suck gas from the intake port 45 and exhaust it from the exhaust port 46.
[0030]
As described above, since the electric motor applies an appropriate pressure with the inner and outer rings of the ball bearings being fixed, creep can be prevented even when used in a diaphragm pump in which a radial unbalance load is constantly applied to the rotating shaft.
[0031]
【The invention's effect】
As is apparent from the above-described embodiment, according to the first aspect of the present invention, since the inner ring and the outer ring of the ball bearing are fixed while applying pressure, creep can be prevented.
[0032]
Further, according to the invention of claim 2 , in addition to the above-mentioned claim, it is easy to ensure the positioning accuracy of the ball bearing, so that it is easy to ensure proper pressurization.
[0033]
Further, according to the third aspect of the present invention, can be shared bearings structure, can prevent creep because of both ball bearing outer ring can be securely fixed with screws.
[0034]
In this way, pressure can be applied while the inner and outer rings of the ball bearings are fixed, so that a long-life motor that prevents creep can be obtained.
[Brief description of the drawings]
1A is a cross-sectional view illustrating a ball bearing outer ring fixing structure of the present invention. FIG. 1B is a plan view illustrating a ball bearing outer ring fixing structure of the present invention. FIG. 2 is a motor according to a first embodiment of the present invention. FIG. 3 is an enlarged view of a main part in Embodiment 1 of the present invention. FIG. 4 is a diagram for explaining a diaphragm pump in Embodiment 2 of the present invention. (B) A diaphragm pump in Embodiment 2 of the present invention. Sectional view of motor and motor 【Explanation of symbols】
DESCRIPTION OF SYMBOLS 11 Bearing holder 12 Ball bearing 13 Holding plate 14 Set screw 15 Head part 21 Bracket 22 Stator 23 Rotating shaft 24 Spacer 25 Spring washer 26 Screw 32 Gap 33 Step 44 Diaphragm

Claims (3)

回転軸を玉軸受で両持ち支承する構造の電動機において、玉軸受の外輪を挿入係止する軸受ホルダと、この軸受ホルダを取り付けるブラケットと、前記軸受ホルダの外周ツバ部の肉厚より厚いスペーサと、前記軸受ホルダとスペーサとの段差間に押圧配設するバネワッシャとを備え、玉軸受の内輪を回転軸に圧入、外輪はビスを介して軸受ホルダに固定、この軸受ホルダをブラケットに対して前記スペーサとバネワッシャとを介してビスで固定して、与圧をかけながら玉軸受の外輪と軸受ホルダをネジ固定してクリープを防止したことを特徴とする電動機。In an electric motor having a structure in which a rotating shaft is both-side supported by a ball bearing, a bearing holder for inserting and locking an outer ring of the ball bearing, a bracket for attaching the bearing holder, a spacer thicker than a thickness of an outer peripheral flange portion of the bearing holder, A spring washer that is pressed between the steps of the bearing holder and the spacer, the inner ring of the ball bearing is press-fitted into the rotating shaft, and the outer ring is fixed to the bearing holder via a screw. The bearing holder is fixed to the bracket with respect to the bracket. An electric motor characterized in that creep is prevented by fixing with a screw through a spacer and a spring washer and screwing the outer ring of the ball bearing and the bearing holder while applying pressure. 内輪の圧入位置決めに回転軸の段部を利用する請求項１記載の電動機。Motor according to claim 1 utilizing the stepped portion of the rotary shaft to the inner ring of the press-fitting positioning. 軸受ホルダを両側に設け、片方の軸受ホルダはスペーサとバネワッシャを用いずにブラケットにビスで固定する請求項１記載の電動機。Provided the bearing holder on both sides, an electric motor of claim 1, wherein the one of the bearing holder to be fixed with screws to the bracket without the use of spacers and spring washer.
JP2001221113A 2001-07-23 2001-07-23 Electric motor Expired - Lifetime JP3879451B2 (en)

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DE102004054457B3 (en) * 2004-11-11 2006-02-09 Ab Skf Multi-purpose machine and automotive roller bearing is retained concealed within a surrounding housing by a spring locking ring
JP4856509B2 (en) * 2006-09-29 2012-01-18 本田技研工業株式会社 Transmission
ES2660376T3 (en) * 2015-03-18 2018-03-22 Roller Bearing Company Of America, Inc. Bearing assembly that has an anti-rotation device
ES2934069T3 (en) * 2018-02-07 2023-02-16 Timken Co Roller seating device for tapered roller bearings
JP2020162245A (en) * 2019-03-26 2020-10-01 日本電産サンキョー株式会社 motor
DE102021205791A1 (en) * 2021-06-08 2022-12-08 Aktiebolaget Skf floating bearing arrangement

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