JPH0615488Y2 - DC rotating electric machine - Google Patents
DC rotating electric machineInfo
- Publication number
- JPH0615488Y2 JPH0615488Y2 JP1987188193U JP18819387U JPH0615488Y2 JP H0615488 Y2 JPH0615488 Y2 JP H0615488Y2 JP 1987188193 U JP1987188193 U JP 1987188193U JP 18819387 U JP18819387 U JP 18819387U JP H0615488 Y2 JPH0615488 Y2 JP H0615488Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- commutator
- bearing
- impregnated bearing
- rotary 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.)
- Expired - Lifetime
Links
Landscapes
- Sliding-Contact Bearings (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Current Collectors (AREA)
Description
【考案の詳細な説明】 〔考案の目的〕 （産業上の利用分野） 本考案は含油軸受を取付けた軸受支承部における整流子
側への油飛散を防止する構造を改良した直流回転電機に
関するものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to a DC rotating electric machine having an improved structure for preventing oil scattering to the commutator side in a bearing support portion to which an oil-impregnated bearing is attached. Is.
（従来の技術） 従来の直流回転電機の軸受支承部は、例えば第４図に示
すように形成されている。(Prior Art) A bearing support portion of a conventional DC rotating electric machine is formed, for example, as shown in FIG.
回転軸１はその両軸端が金属を焼結した含油軸受２で支
持されている。この含油軸受２の湾曲した外周部には給
油パッキン３が摺接し、油を供給するようになってい
る。Both ends of the rotary shaft 1 are supported by oil-impregnated bearings 2 made of sintered metal. An oil supply packing 3 is in sliding contact with the curved outer peripheral portion of the oil-impregnated bearing 2 to supply oil.
この含油軸受２を支持する軸受支承部４は、整流子５側
のエンドブラケット６の中央部内面と、軸受押えバネ７
とで含油軸受２を両側から押えて挟持する構造となって
いる。The bearing support portion 4 that supports the oil-impregnated bearing 2 includes the inner surface of the center portion of the end bracket 6 on the side of the commutator 5 and the bearing pressing spring 7.
With the structure, the oil-impregnated bearing 2 is pressed from both sides and held.
また整流子５と含油軸受２との間にはスラスト調整ワッ
シャ８と、先端が回転軸側にカールした油切り９が取付
けられている。Further, between the commutator 5 and the oil-impregnated bearing 2, a thrust adjusting washer 8 and an oil drainer 9 whose tip is curled toward the rotary shaft are attached.
またこの油切り９の外側には、油吸収パッキン１０が、
軸受バネ押え１１と、カバー１２とにより支持されてい
る。On the outer side of the oil drainer 9, an oil absorbing packing 10 is provided.
It is supported by the bearing spring retainer 11 and the cover 12.
上記従来構造の直流回転電機は、運転開始後温度が上昇
してくると含油軸受２から回転軸１の摺動面に油がしみ
出して潤滑が行われ、油の流出量が多くなると、遠心力
の作用によりワッシャ８を通って飛散する。In the DC rotating electric machine having the above-described conventional structure, when the temperature rises after the start of operation, oil seeps from the oil-impregnated bearing 2 to the sliding surface of the rotary shaft 1 for lubrication, and if the amount of oil outflow increases, centrifugal force will increase. It is scattered through the washer 8 by the action of force.
この飛散した油は油切り９のカール部９Ａで受け止めて
保油するが、この保油能力を超えると軸受押えバネ７と
の隙間から飛散し、これが油吸収パッキン１０に吸収さ
れる。The scattered oil is received and retained by the curl portion 9A of the oil drainer 9, but if the oil retaining capacity is exceeded, it is scattered from the gap between the bearing pressing spring 7 and is absorbed by the oil absorbing packing 10.
しかし油の流出量は、回転電機の取付け方向や運転状態
によって一定しないため、流出量が多いと飛散方向によ
っては油吸収パッキン１０で十分に吸収されず、隙間を
通って整流子５側へ飛散し、刷子摺動面５Ａに付着する
ことがある。However, since the oil outflow amount is not constant depending on the mounting direction of the rotating electric machine and the operating state, if the oil outflow amount is large, it is not sufficiently absorbed by the oil absorbing packing 10 depending on the scattering direction, and is scattered to the commutator 5 side through the gap. However, it may adhere to the brush sliding surface 5A.
この刷子摺動面５Ａに付着した油は、運転中は粘性があ
るが、一旦停止して冷えた状態になるとカーボン粉を含
んだ状態で固化し、再度運転するときに刷子１３と衝突
し、異常音を発生させたり、異常摩耗の原因ともなって
いた。The oil adhered to the brush sliding surface 5A is viscous during operation, but once stopped and becomes cool, it solidifies in a state containing carbon powder, and collides with the brush 13 during operation again, It also caused abnormal noise and abnormal wear.
また従来の構造では、給油パッキン３から含油軸受２に
油が供給されるが、飛散した油は回収されないので、含
浸されている油の量が少なくなってくると、潤滑性が悪
くなってくる問題があった。Further, in the conventional structure, oil is supplied from the oil supply packing 3 to the oil-impregnated bearing 2, but the scattered oil is not collected, so that the lubricity deteriorates as the amount of impregnated oil decreases. There was a problem.
しかも、上記飛散防止機構は部品点数が多く構造が複雑
であるので、組立作業もめんどうでコストアップになる
などの欠点があった。Moreover, since the above scattering prevention mechanism has a large number of parts and has a complicated structure, it has a drawback that the assembly work is troublesome and the cost is increased.
（考案が解決しようとする問題点） 本考案は上記欠点を除去し、極めて簡単な構造により、
整流子を固定する回転軸の筋目ローレットに流出した油
を流し込んで整流子の刷子摺動面側への飛散を防止し
て、異常音や異常摩耗の発生を少なくすると共に、部品
点数も少なく、組立が容易で製造コストも安価な直流回
転電機を提供することを目的とするものである。(Problems to be solved by the invention) The present invention eliminates the above-mentioned drawbacks and has an extremely simple structure.
The oil that has flowed out to the knurls of the rotary shaft that fixes the commutator is poured to prevent the commutator from splashing to the sliding surface of the brush, reducing abnormal noise and abnormal wear, and reducing the number of parts. An object of the present invention is to provide a DC rotating electric machine that is easy to assemble and is inexpensive to manufacture.
［考案の構成］ （問題点を解決するための手段） 本考案は、両側を含油軸受で支持された回転軸の中間部
外周に筋目ローレットを形成し、この筋目ローレット部
分を整流子に挿着して整流子を固定し、この整流子の含
油軸受側の側面に環状の油切り突起を突設して、この内
側に形成された凹部の回転軸側の整流子側面に、前記筋
目ローレットと連通する油溜溝を形成すると共に、整流
子側エンドブラケットに設けられた含油軸受を挟持する
軸受支承部の整流子側の押え板を整流子側に延長して、
延長した端部を回転軸との間に隙間を設けて、前記凹部
の内側に配置して、この隙間を前記油溜溝を対向して設
けたことを特徴とするものである。[Structure of the Invention] (Means for Solving the Problems) In the present invention, a linear knurl is formed on the outer periphery of the intermediate portion of a rotary shaft supported on both sides by oil-impregnated bearings, and the linear knurl is inserted into a commutator. Then, the commutator is fixed, and an annular oil draining protrusion is provided on the side surface of the commutator on the oil-impregnated bearing side, and on the side surface of the commutator on the rotary shaft side of the recess formed inside, the linear knurl and Form a communicating oil reservoir groove, and extend the holding plate on the commutator side of the bearing support part that holds the oil-impregnated bearing provided on the commutator side end bracket to the commutator side.
A gap is provided between the extended end portion and the rotary shaft, the gap is provided inside the recess, and the gap is provided so as to face the oil reservoir groove.
（作用） 本考案の直流回転電機は、含油軸受と回転軸との間の摺
動面から流出した油が、回転軸の軸方向に沿って流れて
くると、軸受支承部と整流子との間から遠心力により外
側に飛散するが整流子の側面に設けた環状の油切り突起
によって軸端方向に導かれ刷子摺動面側への飛散を防止
することができる。(Operation) In the DC rotating electric machine of the present invention, when the oil flowing out from the sliding surface between the oil-impregnated bearing and the rotating shaft flows along the axial direction of the rotating shaft, the bearing supporting portion and the commutator are separated from each other. Although it scatters outward due to centrifugal force from the gap, it can be prevented from scattering to the brush sliding surface side by being guided in the axial end direction by the annular oil draining protrusion provided on the side surface of the commutator.
また運転停止時に回転軸に付着していた油が整流子側に
流下してくると、凹部の中心に形成された油溜溝内に溜
られ、更にここに連通する回転軸の筋目ローレットの隙
間に毛細管作用によって浸透し、運転再開時の回転によ
って刷子摺動面側への飛散を防止することができる。Also, when the oil that had adhered to the rotary shaft at the time of operation stop flows down to the commutator side, it accumulates in the oil reservoir groove formed in the center of the recess, and the gap between the knurled knurls of the rotary shaft that communicates therewith. Can be prevented by the capillary action, and can be prevented from scattering to the brush sliding surface side by the rotation when the operation is restarted.
（実施例） 以下、本考案の一実施例を第１図を参照して詳細に説明
する。(Embodiment) An embodiment of the present invention will be described in detail below with reference to FIG.
回転軸１はその両軸端が金属を焼結した自動調心形の含
油軸受２で支持されている。この含油軸受２の湾曲した
外周部には給油パッキン３が摺接し、油を供給するよう
になっている。Both ends of the rotary shaft 1 are supported by self-aligning oil-impregnated bearings 2 made of sintered metal. An oil supply packing 3 is in sliding contact with the curved outer peripheral portion of the oil-impregnated bearing 2 to supply oil.
この含油軸受２を支持する軸受支承部４は、エンドブラ
ケット６の中央部を整流子５側に折曲して延長した外面
と、軸受押えバネ７の内面で含油軸受２を両側から押え
て挟持する構造となっている。The bearing support portion 4 for supporting the oil-impregnated bearing 2 is sandwiched by pressing the oil-impregnated bearing 2 from both sides by the outer surface obtained by bending the center portion of the end bracket 6 toward the commutator 5 side and the inner surface of the bearing retainer spring 7. It has a structure that
また整流子５の軸端側の側面には環状の油切り突起１４
が形成され、更にこの内側の凹部１５の中心側には中空
円錐状の油溜溝１６が形成されている。この油溜溝１６
の開口端部の内径Ｄは、エンドブラケット６の延長した
端部の内径ｄより大きく形成されている。An annular oil draining protrusion 14 is provided on the side surface of the commutator 5 on the shaft end side.
And a hollow conical oil sump groove 16 is formed on the inner side of the recess 15 on the center side. This oil sump groove 16
The inner diameter D of the open end of is larger than the inner diameter d of the extended end of the end bracket 6.
また整流子５の油溜溝１６と反対側の側面には環状の油
切り突起１７が形成され、整流子５と樹脂粉末を焼結し
た軸絶縁１８との隙間の外側を覆うようになっている。An annular oil draining protrusion 17 is formed on the side surface of the commutator 5 opposite to the oil reservoir groove 16 so as to cover the outside of the gap between the commutator 5 and the shaft insulation 18 obtained by sintering the resin powder. There is.
またエンドブラケット６の中央部の延長した端部は整流
子５に形成した凹部１５の内側に位置し、この端部と含
油軸受２の側面との間にポケット部１９が形成され、こ
のポケット部１９に油吸収パッキン１０が装着されてい
る。The extended end of the center of the end bracket 6 is located inside the recess 15 formed in the commutator 5, and a pocket 19 is formed between this end and the side surface of the oil-impregnated bearing 2. The oil absorbing packing 10 is attached to 19.
また回転軸１には前記油吸収パッキン１０と対向して環
状溝２０が設けられていると共に、整流子５を固定する
筋目ローレット２１が油溜溝１６と連通するように形成
されている。An annular groove 20 is provided on the rotating shaft 1 so as to face the oil absorbing packing 10, and a linear knurl 21 for fixing the commutator 5 is formed so as to communicate with the oil reservoir groove 16.
上記構造の直流回転電機は、運転開始後、温度が上昇し
てくると含油軸受２から、これと回転軸１との摺動面に
油がしみ出して潤滑が行われる。このとき油の流出量が
多くなると摺動面から流出した油は、回転軸１の軸方向
に沿って流れて、ここに形成した環状溝２０内に流入す
る。In the DC rotating electric machine having the above structure, when the temperature rises after the start of operation, oil seeps from the oil-impregnated bearing 2 to the sliding surface between the oil-impregnated bearing 2 and the rotary shaft 1 for lubrication. At this time, when the outflow amount of oil increases, the oil outflowing from the sliding surface flows along the axial direction of the rotating shaft 1 and flows into the annular groove 20 formed here.
この環状溝２０に溜った油は遠心力により外側に飛散す
るが、この環状溝２０に対向して配置した油吸収パッキ
ン１０に捕集されるので、この軸受支承部４から整流子
５への油の飛散を防止することができる。The oil accumulated in the annular groove 20 is scattered outward by centrifugal force, but is collected by the oil absorbing packing 10 arranged so as to face the annular groove 20, so that the oil is absorbed from the bearing support portion 4 to the commutator 5. It is possible to prevent oil from scattering.
また油吸収パッキン１０は含油軸受２に接触してポケッ
ト部１９内に装着されているので、回収した油は再び含
油軸受２に戻されて給油され長期間に亘って潤滑性が保
持される。Further, since the oil absorption packing 10 contacts the oil-impregnated bearing 2 and is mounted in the pocket portion 19, the recovered oil is returned to the oil-impregnated bearing 2 to be refueled and the lubricity is maintained for a long period of time.
また回転軸１の出力軸側を上にして取付けた場合、運転
停止時に環状溝２０に溜った油が回転軸１に沿って整流
子５側に流下してくる。Further, when the rotary shaft 1 is mounted with the output shaft side facing upward, the oil accumulated in the annular groove 20 when the operation is stopped flows down along the rotary shaft 1 to the commutator 5 side.
この状態で運転を開始すると油は遠心力によって飛散す
るが、凹部１５を囲む油切り突起１４が含油軸受２側に
向って形成されているので飛散した油は整流子５と反対
側に導かれる。When the operation is started in this state, the oil is scattered by the centrifugal force, but since the oil-cutting projections 14 surrounding the recess 15 are formed toward the oil-impregnated bearing 2 side, the scattered oil is guided to the side opposite to the commutator 5. .
また長期間運転を停止していたとき、回転軸１に沿って
流下した油は、油溜溝１６の開口端部の内径Ｄが、エン
ドブラケット６の延長した端部の内径ｄより大きく形成
されているので油溜溝１６内に溜られ、更にここに連通
する回転軸１の筋目ローレット２１の隙間に毛細管作用
によって浸透する。Further, when the operation is stopped for a long time, the oil flowing down along the rotary shaft 1 is formed such that the inner diameter D of the open end of the oil reservoir groove 16 is larger than the inner diameter d of the extended end of the end bracket 6. Therefore, the oil is accumulated in the oil reservoir groove 16 and further penetrates into the gap between the linear knurls 21 of the rotary shaft 1 communicating therewith by a capillary action.
筋目ローレット２１に流れ込んで端部に達した油は、整
流子５と樹脂粉末を焼結した軸絶縁１８との隙間から流
出するが、運転を再開すると遠心力によって飛散した油
は油切り突起１７に案内されて整流子５と反対側に導か
れ刷子摺動面５Ａへの付着を防止することができる。The oil flowing into the score knurls 21 and reaching the end flows out from the gap between the commutator 5 and the shaft insulation 18 obtained by sintering the resin powder, but when the operation is restarted, the oil scattered due to the centrifugal force acts on the oil removing projections 17 It is guided to the opposite side of the commutator 5 and can be prevented from adhering to the brush sliding surface 5A.
第２図は本考案の他の実施例を示すもので、軸受支承部
４は、エンドブラケット６の中央部を軸端側に折曲して
延長し、このエンドブラケット６の内側には軸受押えバ
ネ７を整流子５側に延長し、この内側で含油軸受２を挟
持する構造となっている。FIG. 2 shows another embodiment of the present invention, in which the bearing supporting portion 4 extends by bending the central portion of the end bracket 6 toward the shaft end side, and the bearing pressing portion is provided inside the end bracket 6. The spring 7 is extended to the commutator 5 side, and the oil-impregnated bearing 2 is sandwiched inside this.
また軸受押えバネ７の延長した端部は整流子５に形成し
た凹部１５の内側に位置し、含油軸受２の側面との間に
ポケット部１９が形成されこのポケット部１９に油吸収
パッキン１０が装着されている。Further, the extended end portion of the bearing pressing spring 7 is located inside the recess 15 formed in the commutator 5, and a pocket portion 19 is formed between it and the side surface of the oil-impregnated bearing 2, and the oil absorption packing 10 is formed in the pocket portion 19. It is installed.
また整流子５の軸端側の側面には環状の油切り突起１４
が形成され、更にこの内側の凹部１５の中心側には中空
半球状の油溜溝１６が形成されている。An annular oil draining protrusion 14 is provided on the side surface of the commutator 5 on the shaft end side.
A hollow hemispherical oil reservoir groove 16 is formed on the inner side of the recess 15 on the center side.
また整流子５の油溜溝１６と反対側の側面には環状の押
え突起２２が形成され、この内側で整流子５と樹脂粉末
を焼結した軸絶縁１８との間に介在させたＯリング２３
を支持している。An annular pressing protrusion 22 is formed on the side surface of the commutator 5 opposite to the oil sump groove 16, and an O-ring interposed between the commutator 5 and the shaft insulation 18 formed by sintering the resin powder inside this. 23
I support you.
またエンドブラケット６の中央部の延長した端部は整流
子５に形成した凹部１５の内側に位置し、この端部と含
油軸受２の側面との間にポケット部１９が形成され、こ
のポケット部１９に油吸収パッキン１０が装着されてい
る。The extended end of the center of the end bracket 6 is located inside the recess 15 formed in the commutator 5, and a pocket 19 is formed between this end and the side surface of the oil-impregnated bearing 2. The oil absorbing packing 10 is attached to 19.
上記構造の直流回転電機は、摺動面から流出した油が回
転軸１に沿って流下した油溜溝１６内に溜められ、更に
ここに連通する回転軸１の筋目ローレット２１の隙間に
毛細管作用によって流れ込む。この結果、筋目ローレッ
ト２１の端部はＯリング２３で封止されているので、こ
の内部に溜められ、運転を再開しても油が飛散せず刷子
摺動面５Ａへの付着を防止することができる。In the DC rotating electric machine having the above structure, the oil flowing out from the sliding surface is stored in the oil reservoir groove 16 which flows down along the rotary shaft 1, and the capillary action is exerted on the gap of the linear knurl 21 of the rotary shaft 1 communicating therewith. Flow in by. As a result, the end of the crease knurl 21 is sealed by the O-ring 23, so that it is stored inside this and oil does not scatter even when the operation is restarted, and it is prevented from adhering to the brush sliding surface 5A. You can
第３図は本考案の異なる他の実施例を示すもので軸受支
承部４は、エンドブラケット６の中央部を軸端側に折曲
し、このエンドブラケット６の内側には軸受押えバネ７
を整流子５側に延長し、この内側で含油軸受２を挟持す
る構造となっている。FIG. 3 shows another embodiment of the present invention, in which the bearing support portion 4 is formed by bending the center portion of the end bracket 6 toward the shaft end side, and the bearing pressing spring 7 is provided inside the end bracket 6.
Is extended to the commutator 5 side, and the oil-impregnated bearing 2 is sandwiched inside this.
また整流子５の軸端側の側面には環状の油切り突起１４
が形成され、更にこの内側の凹部１５の中心側には中空
半球状の油溜溝１６が形成され、ここに油吸収パッキン
１０が装着されている。An annular oil draining protrusion 14 is provided on the side surface of the commutator 5 on the shaft end side.
Further, a hollow hemispherical oil reservoir groove 16 is formed on the center side of the inner concave portion 15, and the oil absorbing packing 10 is mounted therein.
整流子５の油溜溝１６と反対側の側面には環状の油切り
突起１７が形成され、整流子５と軸絶縁１８との隙間の
外側を覆うようになっている。An annular oil draining protrusion 17 is formed on the side surface of the commutator 5 opposite to the oil reservoir groove 16 so as to cover the outer side of the gap between the commutator 5 and the shaft insulation 18.
上記構造の直流回転電機は、摺動面から流出した油が回
転軸１に沿って流下して油溜溝１６内の油吸収パッキン
１０に吸収される。この油吸収パッキン１０の保油量が
多くなるとこれに接触している筋目ローレット２１の隙
間に毛細管作用によって流れ込む。In the DC rotating electric machine having the above structure, the oil flowing out from the sliding surface flows down along the rotating shaft 1 and is absorbed by the oil absorbing packing 10 in the oil sump groove 16. When the oil retaining amount of the oil absorbing packing 10 increases, the oil absorbing packing 10 flows into the gap between the crease knurls 21 in contact with the oil absorbing packing 10 by a capillary action.
従って油は油吸収パッキン１０と筋目ローレット２１内
に溜められ、運転を再開しても油が飛散せず刷子摺動面
５Ａへの付着を防止することができる。Therefore, the oil is stored in the oil absorbing packing 10 and the crease knurl 21, and the oil does not scatter even when the operation is restarted, so that the oil can be prevented from adhering to the brush sliding surface 5A.
なお上記実施例では含油軸受２の外周面に給油パッキン
３を摺接した構造のものについて示したが、本考案は給
油パッキン３を設けず含油軸受２だけの構造にも適用す
ることができる。In the above embodiment, the oil-impregnated bearing 2 has a structure in which the oil-filling packing 3 is slidably contacted with the outer peripheral surface of the oil-impregnated bearing 2. However, the present invention can be applied to a structure having only the oil-impregnated bearing 2 without providing the oil-impregnated packing 3.
［考案の効果］ 以上説明した如く本考案によれば、極めて簡単な構造に
より、含油軸受の近傍で流出した油を整流子の内側に流
し込んで刷子摺動面側への飛散を防止し、異常音や異常
摩耗の発生を少なくすると共に、部品点数も少なく、組
立が容易で製造コストも安価な直流回転電機を得ること
ができる。[Effects of the Invention] As described above, according to the present invention, with an extremely simple structure, the oil flowing out in the vicinity of the oil-impregnated bearing is poured into the inside of the commutator to prevent the oil from splashing to the brush sliding surface side, thereby preventing abnormalities. It is possible to obtain a DC rotating electric machine that reduces the occurrence of noise and abnormal wear, has a small number of parts, is easy to assemble, and is inexpensive to manufacture.
第１図は本考案の一実施例による直流回転電機を示す縦
断側面図、第２図および第３図は本考案の他の実施例に
よる直流回転電機を示す縦断側面図、第４図は従来の直
流回転電機を示す縦断側面図である。 １…回転軸、２…含油軸受 ３…給油パッキン、４…軸受支承部 ５…整流子、６…エンドブラケット ７…軸受押えバネ、９…油切り １０…油吸収パッキン、１４…油切り突起 １５…凹部、１６…油溜溝 １８…軸絶縁、１９…ポケット部 ２０…環状溝、２１…筋目ローレット ２３…ＯリングFIG. 1 is a vertical sectional side view showing a DC rotating electric machine according to an embodiment of the present invention, FIGS. 2 and 3 are vertical sectional side views showing a DC rotating electric machine according to another embodiment of the present invention, and FIG. FIG. 3 is a vertical sectional side view showing the DC rotating electric machine. DESCRIPTION OF SYMBOLS 1 ... Rotating shaft, 2 ... Oil impregnated bearing 3 ... Oil supply packing, 4 ... Bearing support part 5 ... Commutator, 6 ... End bracket 7 ... Bearing pressing spring, 9 ... Oil drainer 10 ... Oil absorbing packing, 14 ... Oil draining protrusion 15 ... Recesses, 16 ... Oil sump groove 18 ... Shaft insulation, 19 ... Pocket part 20 ... Annular groove, 21 ... Straight knurl 23 ... O-ring
Claims (1)
部外周に筋目ローレットを形成し、この筋目ローレット
部分を整流子に挿着して整流子を固定し、この整流子の
含油軸受側の側面に環状の油切り突起を突設して、この
内側に形成された凹部の回転軸側の整流子側面に、前記
筋目ローレットと連通する油溜溝を形成すると共に、整
流子側エンドブラケットに設けられた含油軸受を挟持す
る軸受支承部の整流子側の押え板を整流子側に延長し
て、延長した端部を回転軸との間に隙間を設けて、前記
凹部の内側に配置して、この隙間と前記油溜溝を対向し
て設けたことを特徴とする直流回転電機。Claims: 1. An oil-impregnated bearing for a commutator, in which a linear knurl is formed on the outer periphery of an intermediate portion of a rotary shaft whose both sides are supported by an oil-impregnated bearing, and the linear knurl portion is inserted into a commutator to fix the commutator. An annular oil draining projection is provided on the side surface on the side, and an oil sump groove communicating with the linear knurl is formed on the side surface of the commutator on the rotary shaft side of the recess formed inside this, and the commutator side end is formed. The presser plate on the commutator side of the bearing support that holds the oil-impregnated bearing provided on the bracket is extended to the commutator side, and the extended end is provided with a gap between the rotary shaft and The DC rotating electric machine is characterized in that the gap and the oil reservoir groove are provided so as to face each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987188193U JPH0615488Y2 (en) | 1987-12-10 | 1987-12-10 | DC rotating electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987188193U JPH0615488Y2 (en) | 1987-12-10 | 1987-12-10 | DC rotating electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0193949U JPH0193949U (en) | 1989-06-21 |
| JPH0615488Y2 true JPH0615488Y2 (en) | 1994-04-20 |
Family
ID=31479305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987188193U Expired - Lifetime JPH0615488Y2 (en) | 1987-12-10 | 1987-12-10 | DC rotating electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0615488Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4990809U (en) * | 1972-11-27 | 1974-08-07 | ||
| JPH025643Y2 (en) * | 1984-09-26 | 1990-02-09 |
-
1987
- 1987-12-10 JP JP1987188193U patent/JPH0615488Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0193949U (en) | 1989-06-21 |
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