JPH05122888A - Compact motor and thrust washer used therefor - Google Patents
Compact motor and thrust washer used thereforInfo
- Publication number
- JPH05122888A JPH05122888A JP3286103A JP28610391A JPH05122888A JP H05122888 A JPH05122888 A JP H05122888A JP 3286103 A JP3286103 A JP 3286103A JP 28610391 A JP28610391 A JP 28610391A JP H05122888 A JPH05122888 A JP H05122888A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- impregnated
- electric motor
- bearing
- rotor shaft
- 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.)
- Granted
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
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Landscapes
- Sliding-Contact Bearings (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば自動車空調用の
送風機その他家電品，事務機器等に使用される小形電動
機及びこれに用いるスラストワッシャに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small electric motor used in, for example, a blower for automobile air conditioning, other home electric appliances, office equipment and the like, and a thrust washer used therefor.
【０００２】[0002]
【従来の技術】従来、この種の小形電動機としては、回
転子軸を含油軸受により支持する方式のものがある。ま
た、回転子軸上には、軸方向の移動を防止するための係
止部材（ストッパ）が設けてあり、この係止部材と含油
軸受との間には回転子軸の軸方向のがたつきを防止する
ために隙間吸収用のスラストワッシャが介装してある。2. Description of the Related Art Conventionally, as a small electric motor of this type, there is a type in which a rotor shaft is supported by oil-impregnated bearings. A locking member (stopper) is provided on the rotor shaft to prevent axial movement, and there is a play in the axial direction of the rotor shaft between the locking member and the oil-impregnated bearing. A thrust washer for absorbing the gap is interposed to prevent sticking.
【０００３】例えば、特開平１−１２８３９号公報，実
開昭６２−９８４５８号公報に開示される小形電動機で
は、含油軸受と係止部材との間に複数枚のスラストワッ
シャと振動吸収用ゴム製ダンパを介在させている。For example, in a small-sized electric motor disclosed in Japanese Unexamined Patent Publication No. 1-12839 and Japanese Utility Model Laid-Open No. 62-98458, a plurality of thrust washers and a vibration absorbing rubber member are provided between an oil-impregnated bearing and a locking member. A damper is interposed.
【０００４】このような小形電動機を例えば自動車用空
調用の送風機として用いた場合、回転子軸の先端には遠
心ファンを取付け、このファンを図示しないスクロール
内で回転させ、生じた風を冷暖房ユニットを介して車室
内に送っている。When such a small electric motor is used as, for example, a blower for air conditioning of an automobile, a centrifugal fan is attached to the tip of the rotor shaft, the fan is rotated in a scroll (not shown), and the generated air is cooled and heated. It is sent to the passenger compartment via.
【０００５】[0005]
【発明が解決しようとする課題】この際、車室内の騒音
は、遠心ファンによる風系騒音と電動機騒音に大別され
るが、特に、低風量領域においては、風系騒音比率が低
下するため僅かの電動機騒音も乗員に不快感を与える結
果となる。耳障りな騒音解消のためには、騒音値の低減
と時間的な音色の変動をなくすことが望まれる。At this time, noise in the passenger compartment is roughly classified into wind system noise due to a centrifugal fan and electric motor noise. Especially, in a low air volume region, the wind system noise ratio decreases. Even slight motor noise can result in occupant discomfort. In order to eliminate annoying noise, it is desired to reduce the noise value and eliminate temporal timbre variation.
【０００６】電動機騒音の主な原因には、回転子のコン
ミテータとブラシ間の摺動、及び軸受と回転子軸方向の
係止部材との間に介在させた隙間吸収用スラストワッシ
ャに起因する回転摺動音がある。The main causes of motor noise are rotation caused by sliding between the commutator and the brush of the rotor and thrust absorbing washers interposed between the bearing and the locking member in the axial direction of the rotor. There is a sliding sound.
【０００７】このうち、後者の騒音原因について考察す
る。例えば上記従来例のように軸受・係止部材間に隙間
吸収用のスラストワッシャを設ける場合、その調整とし
て複数枚の樹脂製又は鉄製のスラストワッシャを用い
る。一方、スラストワッシャには、回転子軸から係止部
材を介してその摩擦による回転力が伝達され、スラスト
ワッシャ間での相対回転摺動や、スラストワッシャとこ
れに当接する軸受端面間の相対回転摺動等の複数種の回
転摺動による騒音が発生する。この複数種の回転摺動音
は複数種の材質により生じているため、これが時間的に
音色を変動させる原因となっていた。また、その騒音低
減策について充分な配慮がなされていなかった。Of these, the latter cause of noise will be considered. For example, when a thrust washer for absorbing a gap is provided between the bearing and the locking member as in the above-mentioned conventional example, a plurality of resin or iron thrust washers are used for the adjustment. On the other hand, the thrust washer transmits the rotational force due to its friction from the rotor shaft through the locking member, and the relative rotation and sliding between the thrust washers and the relative rotation between the thrust washer and the bearing end surface that abuts it. Noise is generated by multiple types of rotary sliding such as sliding. Since the plural kinds of rotational sliding noises are generated by plural kinds of materials, this causes the timbre to change with time. In addition, sufficient consideration was not given to the noise reduction measures.
【０００８】本発明の目的は、上記のようなスラストワ
ッシャと軸受等の相対回転摺動に起因する耳障りな騒音
発生を有効に抑制し、且つこの種スラストワッシャの組
立性の向上を図ることにある。An object of the present invention is to effectively suppress the generation of annoying noise due to the relative rotational sliding of the thrust washer and the bearing as described above, and to improve the assemblability of this type of thrust washer. is there.
【０００９】[0009]
【課題を解決するための手段】本発明は、上記目的を達
成するために、基本的には次のような課題解決手段を提
案する。In order to achieve the above object, the present invention basically proposes the following problem solving means.
【００１０】すなわち、回転子軸が含油軸受により支持
された小形電動機において、前記含油軸受の一端と回転
子軸の軸方向移動防止用の係止部材との間に、含油軸受
と同一又は類似の材質よりなる第２の含油部材を含油軸
受の一端面に弾性部材の力で当接させつつ設けた。前記
弾性部材は、第２の含油部材と共に含油軸受・係止部材
間に介在させるか、或いは係止部材と一体に成形しても
よい。前者の場合の代表的なものとしては、ゴム等の弾
性体があり、後者の場合は係止部材の一部に板ばねを一
体成形し、これを第２の含油軸受にあてがえばよい。That is, in a small electric motor in which the rotor shaft is supported by the oil-impregnated bearing, the same or similar to the oil-impregnated bearing is provided between one end of the oil-impregnated bearing and the locking member for preventing axial movement of the rotor shaft. The second oil-impregnated member made of a material was provided while being brought into contact with one end surface of the oil-impregnated bearing by the force of the elastic member. The elastic member may be interposed between the oil-impregnated bearing and the locking member together with the second oil-impregnated member, or may be formed integrally with the locking member. A typical example of the former case is an elastic body such as rubber, and in the latter case, a leaf spring may be integrally formed on a part of the locking member and applied to the second oil-impregnated bearing.
【００１１】[0011]
【作用】上記構成よりなれば、第２の含油部材は弾性部
材により含油軸受に当接するので含油軸受・係止部材間
の隙間吸収機能を発揮し、回転子軸の軸方向のがたつき
を防止する。With the above construction, the second oil-impregnated member abuts the oil-impregnated bearing by the elastic member, so that the function of absorbing the gap between the oil-impregnated bearing and the locking member is exerted, and the axial play of the rotor shaft is prevented. To prevent.
【００１２】そして、電動機の運転時には、含油軸受端
面と第２の含油部材とが相対回転摺動するが、この相対
回転摺動は同系統の材質による単一種の摺動音だけであ
り、従来のようにスラストワッシャ間の摺動音とスラス
トワッシャ・軸受間で異なる系統の摺動音を発生させる
ことがないので、常に騒音の音色を一定にできる。During operation of the electric motor, the oil-impregnated bearing end surface and the second oil-impregnated member relatively slide relative to each other, but this relative rotational slide is only a single type of sliding sound made of the same material. As described above, the sliding noise between the thrust washers and the sliding noise of different systems between the thrust washer and the bearing are not generated, so that the timbre of the noise can always be made constant.
【００１３】また、第２の含油部材は、自身に含浸され
た潤滑油を含油軸受に対し補給する役割をなし、もしく
は含油軸受・第２の含油部材間で潤滑油の出し入れを行
なうことで、それらの摺動部に流れ出る潤滑油による油
膜が形成され安定した潤滑摺動がなされ騒音が低減す
る。The second oil-impregnated member plays a role of replenishing the oil-impregnated bearing with the lubricating oil impregnated therein, or the lubricating oil is taken in and out between the oil-impregnated bearing and the second oil-impregnated member. An oil film is formed by the lubricating oil flowing out to these sliding portions, and stable lubricating sliding is performed, thus reducing noise.
【００１４】また、第２の含油部材は上記のように弾性
部材を介して含油軸受に当接するので、弾性部材が第２
の含油部材による隙間吸収を自動調整する機能をなし、
従来のように複数枚のスラストワッシャをその板厚を変
えたりして隙間吸収する必要はないので、組立作業の簡
便化を図れる。Since the second oil-impregnated member contacts the oil-impregnated bearing via the elastic member as described above, the elastic member is the second member.
With the function of automatically adjusting the gap absorption by the oil-impregnated member of
Since it is not necessary to absorb the gap by changing the plate thickness of a plurality of thrust washers as in the conventional case, the assembling work can be simplified.
【００１５】[0015]
【実施例】本発明の実施例を図面により説明する。Embodiments of the present invention will be described with reference to the drawings.
【００１６】図１は本発明の第１実施例を示す縦断面
図、図２はそれに用いる部品の一部分解状態を示す縦断
面図である。FIG. 1 is a vertical sectional view showing a first embodiment of the present invention, and FIG. 2 is a vertical sectional view showing a partially disassembled state of components used therein.
【００１７】図１において、電動機のヨーク３の内周に
は固定子１が配設され、ヨーク３の両端が開口し、この
開口にそれぞれのエンドブラケット２Ａ，２Ｂが取付け
られる。In FIG. 1, a stator 1 is arranged on the inner circumference of a yoke 3 of an electric motor, both ends of the yoke 3 are opened, and end brackets 2A and 2B are attached to the openings.
【００１８】エンドブラケット２Ａ，２Ｂの内側には、
含油軸受４Ａ，４Ｂが互いに同心的に組み込まれ、この
含油軸受４Ａ，４Ｂによって回転子軸６が支持される。
含油軸受４Ａ，４Ｂは多孔質の焼結部材で、潤滑油が含
浸される。Inside the end brackets 2A and 2B,
The oil-impregnated bearings 4A and 4B are assembled concentrically with each other, and the rotor shaft 6 is supported by the oil-impregnated bearings 4A and 4B.
The oil-impregnated bearings 4A and 4B are porous sintered members and are impregnated with lubricating oil.
【００１９】回転子軸６は回転子５及びコンミテータ１
１を有する。１２はブラシである。また、回転子軸６に
はその軸方向の移動を防止する係止部材９Ａ，９Ｂが、
回転子軸６に圧入により固定状態で取付けてある。係止
部材９Ａは含油軸受４Ａの外側にその含油軸受と近接配
置され、係止部材９Ｂは含油軸受４Ｂの外側にその含油
軸受と近接配置される。含油軸受４Ａの外側端面と係止
部材９Ａとの間には、第２の含油部材７Ａとゴムよりな
る弾性部材８Ａとが介在するよう配設される。同様に含
油軸受４Ｂの外側端面と係止部材９Ｂとの間には、第２
の含油部材７Ｂと弾性部材８Ｂとが介在するよう配置さ
れる。The rotor shaft 6 is the rotor 5 and the commutator 1.
Has 1. 12 is a brush. Further, the rotor shaft 6 is provided with locking members 9A and 9B for preventing the axial movement thereof.
It is fixedly attached to the rotor shaft 6 by press fitting. The locking member 9A is arranged outside the oil-impregnated bearing 4A in proximity to the oil-impregnated bearing, and the locking member 9B is arranged outside of the oil-impregnated bearing 4B in proximity to the oil-impregnated bearing. A second oil-impregnated member 7A and an elastic member 8A made of rubber are arranged between the outer end surface of the oil-impregnated bearing 4A and the locking member 9A. Similarly, between the outer end surface of the oil-impregnated bearing 4B and the locking member 9B, a second
The oil-impregnated member 7B and the elastic member 8B are disposed so as to intervene.
【００２０】第２の含油部材７Ａ，７Ｂは、含油軸受４
Ａ，４Ｂと同一或いは類似の材質よりなる多孔質焼結部
材を用い、ワッシャ状に形成されてスラストワッシャと
して機能をなし、潤滑油が含浸されている。また、この
スラストワッシャ要素７Ａ，７Ｂは弾性部材８Ａ，８Ｂ
の力を受けて含油軸受４Ａ，４Ｂの各一端に当接する。
弾性部材８Ａ，８Ｂは振動吸収用ダンパとして機能する
ほかに、スラストワッシャ７Ａ，７Ｂが含油軸受４Ａ・
係止部材８Ａ間，含油軸受４Ｂ・係止部材８Ｂ間の軸方
向の隙間吸収を行なう場合にその隙間吸収を常時保証す
る自動隙間吸収調整機能をなす。The second oil-impregnated members 7A and 7B are the oil-impregnated bearing 4
Using a porous sintered member made of the same or similar material as A and 4B, it is formed in a washer shape and functions as a thrust washer, and is impregnated with lubricating oil. The thrust washer elements 7A and 7B are elastic members 8A and 8B.
Of the oil-impregnated bearings 4A and 4B.
In addition to the elastic members 8A and 8B functioning as vibration absorbing dampers, the thrust washers 7A and 7B are replaced by oil-impregnated bearings 4A.
When absorbing the axial clearance between the locking members 8A and between the oil-impregnated bearing 4B and the locking member 8B, an automatic clearance absorption adjusting function is always ensured.
【００２１】ここで、図２により、第２の含油軸受７
Ａ，７Ｂ、弾性部材８Ａ，８Ｂ、係止部材９Ａ，９Ｂの
組付けについて説明する。Here, referring to FIG. 2, the second oil-impregnated bearing 7 is shown.
Assembly of A, 7B, elastic members 8A, 8B, and locking members 9A, 9B will be described.
【００２２】回転子軸６が含油軸受４Ａ，４Ｂに挿通さ
れた組立工程後に、回転子軸４の一端からスラストワッ
シャ（第２の含油部材）７Ａ，弾性部材８Ａを挿入し、
その後に係止部材９Ａを回転子軸６に設けた第１の段付
部１３に圧入固定する。一方、回転子軸６のもう一方の
他端より、上記同様にスラストワッシャ（第２の含油部
材）７Ｂ，弾性部材８Ｂを挿入し、その後に係止部材９
Ｂを回転子軸６に設けた第２の段付部１４に圧入固定す
る。After the assembly process in which the rotor shaft 6 is inserted through the oil-impregnated bearings 4A and 4B, the thrust washer (second oil-impregnated member) 7A and the elastic member 8A are inserted from one end of the rotor shaft 4.
After that, the locking member 9A is press-fitted and fixed to the first stepped portion 13 provided on the rotor shaft 6. On the other hand, the thrust washer (second oil impregnation member) 7B and the elastic member 8B are inserted from the other end of the rotor shaft 6 in the same manner as described above, and then the locking member 9 is inserted.
B is press-fitted and fixed to the second stepped portion 14 provided on the rotor shaft 6.
【００２３】この場合、軸受４Ｂ端面と回転子軸６に設
けた段付部１４迄の長さは、スラストワッシャ７Ｂと弾
性部材８Ｂとを加えた厚さより若干小さくなるような適
当なる寸法としている。このようにすると、係止部材９
Ｂは、回転子軸６に設けた第２の段付部１４の軸受４Ｂ
側末端まで寸法調整なしに、回転子軸６に圧入するだけ
で軸方向隙間がなくなる。そして、第１，第２の係止部
材９Ａ，９Ｂと両軸受４Ａ，４Ｂ間で弾性部材８Ａ，８
Ｂの弾性反力にてスラストワッシャたる含油部材７Ａ，
７Ｂがそれぞれ対応の含油軸受４Ａ，４Ｂ一端に当接す
る。In this case, the length from the end surface of the bearing 4B to the stepped portion 14 provided on the rotor shaft 6 is set to an appropriate dimension which is slightly smaller than the total thickness of the thrust washer 7B and the elastic member 8B. .. In this way, the locking member 9
B is a bearing 4B of the second stepped portion 14 provided on the rotor shaft 6.
The axial clearance is eliminated by simply press-fitting into the rotor shaft 6 without adjusting the dimensions to the side ends. The elastic members 8A, 8 are provided between the first and second locking members 9A, 9B and the bearings 4A, 4B.
The oil reaction member 7A which is a thrust washer by the elastic reaction force of B,
7B abuts one end of the corresponding oil-impregnated bearing 4A, 4B.
【００２４】ここでスラストワッシャ７Ａ，７Ｂとして
用いる第２の含油部材の機能、材質について述べる。Here, the function and material of the second oil-impregnated member used as the thrust washers 7A and 7B will be described.
【００２５】スラストワッシャ７Ａ，７Ｂは、ポーラス
密度が含油率にて１４％以上で含油軸受４Ａ，４Ｂとほ
ゞ同等とし、板厚が１．０〜５．０ｍｍとした平ワッシ
ャ形状を呈する。先に述べたとおり、スラストワッシャ
７Ａ，７Ｂの一方の端面は、含油軸受４Ａ，４Ｂの端面
と摺動するため、含油軸受或いはスラストワッシャに含
浸された潤滑油がこの摺動部に流れ出ることで油膜が形
成され、相互に潤滑油が行き来することでより安定した
潤滑摺動がなされる。The thrust washers 7A and 7B have a porous density of 14% or more in terms of oil content and are almost equal to the oil-impregnated bearings 4A and 4B, and have a flat washer shape with a plate thickness of 1.0 to 5.0 mm. As described above, one end surface of the thrust washers 7A, 7B slides on the end surfaces of the oil-impregnated bearings 4A, 4B, so that the lubricating oil impregnated in the oil-impregnated bearings or thrust washers flows out to this sliding portion. An oil film is formed and the lubricating oil moves back and forth, so that more stable lubricating sliding is performed.
【００２６】また、スラストワッシャ７Ａ，７Ｂの面粗
さは、焼結成形時粗さが６μｍ前後となっているが、そ
の端面を機械加工又は焼結手段で再圧することにより面
粗さ６μｍ以下として、表面凹凸を更に少なくしてい
る。The surface roughness of the thrust washers 7A and 7B is about 6 μm at the time of sinter molding, but the surface roughness is 6 μm or less by repressing the end surface by machining or sintering means. As a result, the surface irregularities are further reduced.
【００２７】本実施例によれば、上記のようなスラスト
ワッシャ７Ａ，７Ｂの潤滑摺動と表面粗さの減少とによ
りスラスト７Ａ・含油軸受４Ａ間およびスラスト７Ｂ・
含油軸受４Ｂ間の摺動摩擦音を低減する。また、含油軸
受４Ａ（４Ｂ）端面とスラストワッシャ７Ａ（７Ｂ）と
が相対回転摺動するが、この相対回転摺動は同系統の材
質による単一種の摺動音だけであり、従来のようにスラ
ストワッシャ間の摺動音とスラストワッシャ・軸受間で
異なる系統の摺動音を発生させることがないので、常に
騒音の音色を一定にできる。According to the present embodiment, due to the above-mentioned lubrication sliding of the thrust washers 7A, 7B and the reduction of the surface roughness, the thrust 7A and the oil-impregnated bearing 4A and the thrust 7B.
The sliding friction noise between the oil-impregnated bearings 4B is reduced. Further, the end surface of the oil-impregnated bearing 4A (4B) and the thrust washer 7A (7B) relatively slide relative to each other, but this relative rotational slide is only a single type of sliding sound made of a material of the same system. Since the sliding noise between the thrust washers and the sliding noise of different systems between the thrust washer and the bearing are not generated, the tone color of the noise can always be made constant.
【００２８】その結果、この種電動機の不快な騒音発生
を有効に抑制でき、同時にスラストワッシャ，弾性体，
係止部材の組付けが簡便なことから電動機の組立性を向
上させることができる。As a result, the generation of unpleasant noise of this kind of electric motor can be effectively suppressed, and at the same time, the thrust washer, the elastic body,
Since the assembling of the locking member is simple, the assembling property of the electric motor can be improved.
【００２９】図３は本発明の第２実施例を示す縦断面図
であり、図中、第１実施例と同一符号は同一或いは共通
する要素を示す。FIG. 3 is a vertical sectional view showing a second embodiment of the present invention. In the figure, the same reference numerals as those in the first embodiment indicate the same or common elements.
【００３０】本実施例と第１実施例の異なる点は、スラ
ストワッシャ７Ａ，７Ｂ、弾性部材８Ａ，８Ｂ、係止部
材９Ａ，９Ｂの取付け位置にある。すなわち、第１実施
例がこれらの要素を含油軸受４Ａ，４Ｂの外側に配置し
たのに対して、本実施例では、内側に配置した。The difference between this embodiment and the first embodiment is the mounting positions of the thrust washers 7A, 7B, the elastic members 8A, 8B, and the locking members 9A, 9B. That is, these elements are arranged outside the oil-impregnated bearings 4A and 4B in the first embodiment, whereas they are arranged inside in the present embodiment.
【００３１】具体的には、図３に示すように、係止部材
９Ａはコンミテータ１１の一端に受け止められ、この係
止部材９Ａと軸受４Ａとの間に係止部材９Ａ側から順に
弾性部材８Ａ，スラストワッシャ７Ａが介在配置され
る。一方、係止部材９Ｂは回転子５の一端に受け止めら
れ、係止部材９Ｂと軸受４Ｂとの間に係止部材９Ｂ側か
ら順に弾性部材８Ｂ，スラストワッシャ７Ｂが介在配置
される。Specifically, as shown in FIG. 3, the locking member 9A is received by one end of the commutator 11, and the elastic member 8A is sequentially provided between the locking member 9A and the bearing 4A from the locking member 9A side. , The thrust washer 7A is interposed. On the other hand, the locking member 9B is received by one end of the rotor 5, and the elastic member 8B and the thrust washer 7B are arranged in order from the locking member 9B side between the locking member 9B and the bearing 4B.
【００３２】このような構成よりなれば、本実施例も第
１実施例と同様の効果を奏する。With this structure, this embodiment also has the same effect as the first embodiment.
【００３３】なお、上記各実施例では、ヨーク３両端に
エンドブラケット２Ａ，２Ｂを配置したものを例示した
が、エンドブラケットの一端だけを開口してこれにエン
ドブラケットを取付け、含油軸受はエンドブラケットと
ヨーク一端に配設したものであっても、本発明を適用す
ることは可能である。In each of the above embodiments, the end brackets 2A and 2B are arranged at both ends of the yoke 3, but only one end of the end bracket is opened and the end bracket is attached to the end bracket. The present invention can be applied to the case where it is arranged at one end of the yoke.
【００３４】[0034]
【発明の効果】以上のように本発明によれば、小形電動
機のスラストワッシャとして含油軸受同様の含油部材を
使用し、これを弾性部材の力で含油軸受に当接させるこ
とで、スラストワッシャと軸受等の相対回転摺動に起因
する騒音の低減と耳障りな騒音（音色変動）発生を有効
に抑制できる。また、この種部品の組込みを簡便にする
ことで小形電動機の組立性を向上させることができる。As described above, according to the present invention, an oil-impregnated member similar to an oil-impregnated bearing is used as the thrust washer of the small electric motor, and the thrust washer is brought into contact with the oil-impregnated bearing by the force of the elastic member. It is possible to effectively reduce noise caused by relative rotation and sliding of bearings and the generation of annoying noise (timbre variation). In addition, the ease of assembling this kind of component can improve the assemblability of the small electric motor.
【図１】本発明の第１実施例を示す縦断面図。FIG. 1 is a vertical sectional view showing a first embodiment of the present invention.
【図２】第１実施例の一部を分解した状態を示す縦断面
図。FIG. 2 is a longitudinal sectional view showing a state in which a part of the first embodiment is disassembled.
【図３】本発明の第２実施例を示す縦断面図。FIG. 3 is a longitudinal sectional view showing a second embodiment of the present invention.
２Ａ，２Ｂ…エンドブラケット、３…ヨーク、４Ａ，４
Ｂ…含油軸受、５…回転子、６…回転子軸、７Ａ，７Ｂ
…第２の含油部材（スラストワッシャ）、８Ａ，８Ｂ…
弾性部材（ダンパ）、９Ａ，９Ｂ…係止部材。2A, 2B ... End bracket, 3 ... Yoke, 4A, 4
B ... Oil-bearing bearing, 5 ... Rotor, 6 ... Rotor shaft, 7A, 7B
... Second oil-impregnated member (thrust washer), 8A, 8B ...
Elastic member (damper), 9A, 9B ... Locking member.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鴨志田 弘光 茨城県勝田市大字高場2520番地 株式会社 日立製作所自動車機器事業部内 (72)発明者 深作 良範 茨城県勝田市大字高場2520番地 株式会社 日立製作所自動車機器事業部内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiromitsu Kamoshida 2520 Takaba, Takata, Ibaraki Pref., Automotive Equipment Division, Hitachi, Ltd. (72) Yoshinori Fukasaku 2520 Takaba, Katsuta, Ibaraki Hitachi, Ltd. Factory Automotive Equipment Division
Claims (13)
形電動機において、前記含油軸受の一端と前記回転子軸
の軸方向移動防止用の係止部材との間に、前記含油軸受
と同一又は類似の材質よりなる第２の含油部材を前記含
油軸受の一端面に弾性部材の力で当接させつつ設けたこ
とを特徴とする小形電動機。1. A small electric motor in which a rotor shaft is supported by oil-impregnated bearings, the same as the oil-impregnated bearings being provided between one end of the oil-impregnated bearings and a locking member for preventing axial movement of the rotor shaft. A small electric motor, wherein a second oil-impregnated member made of a similar material is provided while making contact with one end surface of the oil-impregnated bearing by the force of an elastic member.
止部材と別体或いは該係止部材と一体成形したことを特
徴とする小形電動機。2. The small electric motor according to claim 1, wherein the elastic member is formed separately from the locking member or integrally formed with the locking member.
形電動機において、前記含油軸受の一端と前記回転子軸
の軸方向移動防止用の係止部材との間に、前記含油軸受
と同一又は類似の材質よりなる第２の含油部材を前記含
油軸受の一端面に当接させつつこの第２の含油部材及び
弾性部材を介在させることで、前記含油軸受・係止部材
間の軸方向の隙間を吸収するよう設定したことを特徴と
する小形電動機。3. A small electric motor in which a rotor shaft is supported by an oil-impregnated bearing, the same as the oil-impregnated bearing or between the one end of the oil-impregnated bearing and a locking member for preventing axial movement of the rotor shaft. The second oil-impregnated member made of a similar material is brought into contact with one end surface of the oil-impregnated bearing, and the second oil-impregnated member and the elastic member are interposed so that the axial gap between the oil-impregnated bearing and the locking member is increased. A small electric motor characterized by being set to absorb.
トを装着し、該ヨークと片側配置のエンドブラケット或
いは両側配置のエンドブラケットに含油軸受を設け、回
転子軸がこの含油軸受により支持される小形電動機にお
いて、前記含油軸受の一端と前記回転子軸の軸方向移動
防止用の係止部材との間に、振動吸収用の弾性体ダンパ
と前記含油軸受同様に焼結成形された第２の含油部材と
を介在させ、前記第２の含油部材を前記弾性体ダンパの
弾性力により前記含油軸受に当接させたことを特徴とす
る小形電動機。4. A small electric motor in which an end bracket is mounted on one side or both sides of a yoke, and an oil-impregnated bearing is provided on the yoke and the end bracket arranged on one side or both end brackets, and a rotor shaft is supported by this oil-impregnated bearing. A second oil-impregnated member, which is sintered between the elastic damper for vibration absorption and the oil-impregnated bearing between one end of the oil-impregnated bearing and the locking member for preventing axial movement of the rotor shaft. A small electric motor characterized in that the second oil-impregnated member is brought into contact with the oil-impregnated bearing by the elastic force of the elastic body damper.
において、前記第２の含油部材は、前記含油軸受と同様
に焼結成形された多孔質部材を用いて、この多孔質部材
をワッシャ形状に成形して成ることを特徴とする小形電
動機。5. The porous member according to any one of claims 1 to 4, wherein the second oil-impregnated member is a porous member sintered and formed similarly to the oil-impregnated bearing. A small electric motor characterized by being formed into a washer shape.
において、前記第２の含油部材は焼結成形品で、前記含
油軸受に当接する側の面が機械加工又は焼結時の再圧手
段により表面凹凸度合を減少させてあることを特徴とす
る小形電動機。6. The oil-impregnated member according to claim 1, wherein the second oil-impregnated member is a sintered molded product, and a surface of the second oil-impregnated member in contact with the oil-impregnated bearing is reprocessed during machining or sintering. A compact electric motor characterized in that the degree of surface irregularities is reduced by a pressure means.
の含油部材としてポーラス密度が含油率にて１４％／Ｖ
ｏｌ以上で、板厚が１．０〜５．０ｍｍの焼結部材を用
いたことを特徴とする小形電動機。7. The second device according to claim 5 or 6,
Porous density of 14% / V in oil content
A small electric motor characterized by using a sintered member having a thickness of 1.0 to 5.0 mm and having a thickness of at least ol.
において、前記係止部材は、前記回転子軸上に前記含油
軸受よりも外側に位置して配設され、この係止部材と前
記含油軸受の外側端面との間に前記第２の含油部材及び
弾性部材（弾性体ダンパ）を嵌装したことを特徴とする
小形電動機。8. The locking member according to any one of claims 1 to 7, wherein the locking member is disposed on the rotor shaft outside the oil-impregnated bearing. A small electric motor, wherein the second oil-impregnating member and an elastic member (elastic damper) are fitted between the outer end surface of the oil-impregnating bearing.
において、前記係止部材は、前記回転子軸上に前記含油
軸受よりも内側に位置して配設され、この係止部材と前
記含油軸受の内側端面との間に前記第２の含油部材及び
弾性部材（弾性体ダンパ）を嵌装したことを特徴とする
小形電動機。9. The locking member according to claim 1, wherein the locking member is disposed on the rotor shaft inside the oil-impregnated bearing. A small electric motor characterized in that the second oil-impregnating member and an elastic member (elastic damper) are fitted between the inner end surface of the oil-impregnating bearing.
係止部材は前記回転子軸の外周に圧入により嵌合固定し
たことを特徴とする小形電動機。10. The small electric motor according to claim 8 or 9, wherein the locking member is fitted and fixed to the outer circumference of the rotor shaft by press fitting.
スト移動防止用係止部材との間の隙間吸収に使用される
スラストワッシャで、該スラストワッシャは含油軸受と
同様の多孔質の焼結部材より成ることを特徴とするスラ
ストワッシャ。11. A thrust washer used for absorbing a gap between a bearing for a small electric motor and a thrust movement preventing locking member of a rotor shaft, the thrust washer being a porous sintered material similar to an oil-impregnated bearing. A thrust washer comprising a member.
ッシャに用いる焼結部材は、少なくともその一端面が機
械加工又は焼結時の再圧手段によって、表面粗さを減少
させてあることを特徴とするスラストワッシャ。12. The sintered member used in the thrust washer according to claim 11, wherein at least one end surface of the sintered member has a surface roughness reduced by a re-pressing means during machining or sintering. Thrust washer.
前記スラストワッシャに用いる焼結部材は、ポーラス密
度が含油率で１４％／Ｖｏｌ以上で板厚が１．０〜５．
０ｍｍとしたことを特徴とするスラストワッシャ。13. The method according to claim 11 or 12,
The sintered member used for the thrust washer has a porous density of 14% / Vol or more in terms of oil content and a plate thickness of 1.0 to 5.
Thrust washer characterized by being 0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3286103A JP2749221B2 (en) | 1991-10-31 | 1991-10-31 | Small electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3286103A JP2749221B2 (en) | 1991-10-31 | 1991-10-31 | Small electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05122888A true JPH05122888A (en) | 1993-05-18 |
| JP2749221B2 JP2749221B2 (en) | 1998-05-13 |
Family
ID=17699978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3286103A Expired - Fee Related JP2749221B2 (en) | 1991-10-31 | 1991-10-31 | Small electric motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2749221B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002250416A (en) * | 2001-02-22 | 2002-09-06 | Kawasaki Heavy Ind Ltd | Vehicle-mounted v-belt speed variable change gear |
| JP2014082846A (en) * | 2012-10-15 | 2014-05-08 | Asmo Co Ltd | Motor |
| CN104037970A (en) * | 2014-06-20 | 2014-09-10 | 上海博邦汽车技术有限公司 | Spacer and motor with same |
| JPWO2014021368A1 (en) * | 2012-07-31 | 2016-07-21 | 伊東電機株式会社 | Motor unit and motor built-in roller |
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|---|---|---|---|---|
| JPS5128580U (en) * | 1974-08-23 | 1976-03-01 | ||
| JPS5497709U (en) * | 1977-12-23 | 1979-07-10 | ||
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| JPS62165740U (en) * | 1986-04-09 | 1987-10-21 | ||
| JPH02110961U (en) * | 1989-02-21 | 1990-09-05 | ||
| JPH03164042A (en) * | 1989-11-22 | 1991-07-16 | Matsushita Electric Ind Co Ltd | Bearing device of motor |
| JP3077256U (en) * | 2000-10-26 | 2001-05-18 | 旭昇 施 | Ink refillable stamp |
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1991
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5128580U (en) * | 1974-08-23 | 1976-03-01 | ||
| JPS5497709U (en) * | 1977-12-23 | 1979-07-10 | ||
| JPS6298458U (en) * | 1985-12-11 | 1987-06-23 | ||
| JPS62165740U (en) * | 1986-04-09 | 1987-10-21 | ||
| JPH02110961U (en) * | 1989-02-21 | 1990-09-05 | ||
| JPH03164042A (en) * | 1989-11-22 | 1991-07-16 | Matsushita Electric Ind Co Ltd | Bearing device of motor |
| JP3077256U (en) * | 2000-10-26 | 2001-05-18 | 旭昇 施 | Ink refillable stamp |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002250416A (en) * | 2001-02-22 | 2002-09-06 | Kawasaki Heavy Ind Ltd | Vehicle-mounted v-belt speed variable change gear |
| JPWO2014021368A1 (en) * | 2012-07-31 | 2016-07-21 | 伊東電機株式会社 | Motor unit and motor built-in roller |
| JP2014082846A (en) * | 2012-10-15 | 2014-05-08 | Asmo Co Ltd | Motor |
| CN104037970A (en) * | 2014-06-20 | 2014-09-10 | 上海博邦汽车技术有限公司 | Spacer and motor with same |
| CN104037970B (en) * | 2014-06-20 | 2016-05-11 | 上海博邦汽车技术有限公司 | With the motor of pad |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2749221B2 (en) | 1998-05-13 |
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