JPH11344034A - Oil-retaining bearing device - Google Patents
Oil-retaining bearing deviceInfo
- Publication number
- JPH11344034A JPH11344034A JP15149998A JP15149998A JPH11344034A JP H11344034 A JPH11344034 A JP H11344034A JP 15149998 A JP15149998 A JP 15149998A JP 15149998 A JP15149998 A JP 15149998A JP H11344034 A JPH11344034 A JP H11344034A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- bearing
- retaining ring
- lubricating oil
- peripheral surface
- 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
Landscapes
- Sliding-Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、焼結合金などの
多孔質部材からなる含油軸受を用いた軸受装置に関する
ものであり、とくに軸受装置からの潤滑油の漏洩防止手
段の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing device using an oil-impregnated bearing made of a porous member such as a sintered alloy, and more particularly to an improvement in means for preventing leakage of lubricating oil from the bearing device. .
【０００２】[0002]
【従来の技術】図２は従来の軸受装置の一例を示したも
ので、回転軸１０を支持する焼結含油軸受３０は機器の
ハウジング４０に固定され、その外周部に潤滑油を含浸
させたフェルト５３を接触させて、潤滑油の補給を図っ
ている。回転軸１０の下端は、スラスト受け板４１を介
して支えられている。この種の軸受装置においては焼結
含油軸受３０に吸蔵されている潤滑油が摺動摩擦に伴う
温度や圧力上昇によって滲み出し、摺動面の潤滑を行な
う訳であるが、滲み出した潤滑油は回転軸１０を伝って
漏出する。そこでこれを防ぐため、回転軸に油留め輪２
０を設けて一体に回転させ、この油留め輪に遮られ遠心
力で振り切られた潤滑油をフェルト５４で吸収し、フェ
ルト５３を経て焼結含油軸受３０に戻すようにしてい
る。2. Description of the Related Art FIG. 2 shows an example of a conventional bearing device. A sintered oil-impregnated bearing 30 for supporting a rotating shaft 10 is fixed to a housing 40 of an apparatus, and its outer peripheral portion is impregnated with lubricating oil. The felt 53 is brought into contact to supply lubricating oil. The lower end of the rotating shaft 10 is supported via a thrust receiving plate 41. In this type of bearing device, the lubricating oil occluded in the sintered oil-impregnated bearing 30 oozes out due to temperature and pressure rises caused by sliding friction and lubricates the sliding surface. It leaks along the rotating shaft 10. Therefore, in order to prevent this, an oil retaining ring 2
The lubricating oil blocked by the oil retaining ring and shaken off by centrifugal force is absorbed by the felt 54 and returned to the sintered oil-impregnated bearing 30 through the felt 53.
【０００３】[0003]
【発明が解決しようとする課題】この様な潤滑油の循環
システムにおいては、潤滑油を円滑に循環させることが
重要である。循環油量は焼結軸受の気孔率により左右さ
れ、気孔率が大きいほど油の通過抵抗が小さくなるので
循環油量が増加する。しかしその反面、油の通過抵抗が
小さいほど摺動面に滲出した油が軸受内に逃げ易く、そ
の結果油膜切れを生じ易くなって耐荷重性が減少する。
即ち、油膜を保って軸受負荷能力を高めるためには気孔
率を小さくすることが、一方、潤滑油の円滑な循環を図
るためには気孔率を大きくすることが必要な訳で、軸受
の気孔率の面からは循環油量と軸受負荷能力とは相反す
る関係になっている。そこで、気孔率は軸受負荷能力を
優先して適切に設定するものとし、その上で気孔率によ
らずに、潤滑油をより円滑に循環させるための工夫が求
められていた。In such a lubricating oil circulation system, it is important to smoothly circulate the lubricating oil. The amount of circulating oil depends on the porosity of the sintered bearing, and the higher the porosity, the lower the oil passage resistance, so the amount of circulating oil increases. However, on the other hand, the smaller the oil passage resistance, the easier the oil oozing out on the sliding surface to escape into the bearing, and as a result, the more easily the oil film breaks, and the lower the load resistance.
That is, in order to maintain the oil film and increase the bearing load capacity, it is necessary to reduce the porosity. On the other hand, in order to achieve smooth circulation of the lubricating oil, it is necessary to increase the porosity. From the aspect of the rate, the amount of circulating oil and the bearing load capacity have a conflicting relationship. Therefore, the porosity is appropriately set with priority given to the bearing load capacity, and furthermore, there is a need for a device for circulating the lubricating oil more smoothly regardless of the porosity.
【０００４】[0004]
【課題を解決するための手段】従来の軸受装置における
油留め輪の場合、その焼結含油軸受３０に対向する側
（図では下側）の面を内側面，その反対側（図では上
側）の面を外側面と名付けると、内側面は潤滑油を振り
切る働きをするが、外側面は何の機能も持たされていな
い。そこでこの発明では、この遊んでいる外側面に羽根
を設けることにより油留め輪を遠心ファンの羽根車（イ
ンペラ）としても機能させ、油留め輪の内側面で振り切
られてフェルトに付着した潤滑油のフェルト内部への浸
透〜焼結含油軸受への移動を、油留め輪（兼インペラ）
の回転に伴い生じる風圧で促進させるよう構成した。即
ちこの発明は、油留め輪の外側面をインペラとして機能
させることと，その機能を確保するために油留め輪の上
部空間を蓋で覆ってインペラの周りにケーシングを形成
し蓋と回転軸との隙間を空気の取り入れ口としたことを
骨子とするものである。Means for Solving the Problems In the case of an oil retaining ring in a conventional bearing device, the surface (lower side in the figure) facing the sintered oil-impregnated bearing 30 is the inner side, and the opposite side (upper side in the figure). If the surface is called the outer surface, the inner surface works to shake off the lubricating oil, but the outer surface has no function. Therefore, in the present invention, the oil retaining ring also functions as an impeller of the centrifugal fan by providing the blade on the idle outer surface, and the lubricating oil that is shaken off on the inner surface of the oil retaining ring and adheres to the felt. Oil penetration into the interior of the felt ~ transfer to the sintered oil-impregnated bearing, oil retaining ring (also impeller)
It is configured to be accelerated by the wind pressure generated by the rotation of. That is, the present invention allows the outer surface of the oil retaining ring to function as an impeller, and forms a casing around the impeller by covering the upper space of the oil retaining ring with a lid in order to secure the function. The main point is that the gap between the two is used as an air intake.
【０００５】油留め輪の外側面に設ける羽根の形状は、
回転軸の回転方向，回転速度などが予定されている場合
には、それらの条件に応じて前傾翼型，後傾翼型など適
切に選択される。放射状翼型は、前傾翼型に比べて風圧
は若干劣るものの、回転軸の回転方向を選ばない（逆回
転でも風圧が同一）利点がある。[0005] The shape of the blade provided on the outer surface of the oil retaining ring is as follows:
If the rotation direction and the rotation speed of the rotating shaft are planned, a forward inclined blade type, a backward inclined blade type, or the like is appropriately selected according to those conditions. The radial airfoil has an advantage that the wind pressure is slightly inferior to the forward-inclined airfoil, but the rotation direction of the rotating shaft is not selected (the wind pressure is the same even in reverse rotation).
【０００６】[0006]
【発明の実施の形態】（実施例１） この発明の一実施
例を図１に示す。大まかな構成は従来の装置（図２参
照）と同様で、回転軸１０を支持する焼結含油軸受３０
はケース（ハウジング）４０に固定され、回転軸の下端
はスラスト受け板４１を介して底板４２が支持してい
る。中空円筒状の保油材（フェルト）５０がその外周を
ケース４０に，下端面を焼結含油軸受３０に接して設け
られ、油留め輪２０の内側面で振り切られた潤滑油をフ
ェルト５０で吸収して焼結含油軸受３０に戻す点も、従
来と同じである。(Embodiment 1) FIG. 1 shows an embodiment of the present invention. The rough configuration is the same as that of the conventional device (see FIG. 2), and the sintered oil-impregnated bearing 30 for supporting the rotating shaft 10 is provided.
Is fixed to a case (housing) 40, and the lower end of the rotating shaft is supported by a bottom plate 42 via a thrust receiving plate 41. A hollow cylindrical oil retaining material (felt) 50 is provided with its outer periphery in contact with the case 40 and the lower end surface in contact with the sintered oil-impregnated bearing 30. Lubricating oil that has been shaken off on the inner side surface of the oil retaining ring 20 is applied by the felt 50. The point of absorption and return to the sintered oil-impregnated bearing 30 is the same as in the prior art.
【０００７】この例における焼結含油軸受３０は軸孔の
両端部３１で回転軸１０を支持し、その中間には逃げ部
３２を設けて回転軸との摺動面積を減らしている。この
様な逃げ部を設けて内径仕上げの困難や摩擦抵抗の増加
を避けるのは軸受が長い場合の常用手段であるが、軸受
の長短に拘らず逃げ部を設け、その深さを大きくして貯
油室の機能を兼ねさせると軸受の寿命を延長することが
できる。軸孔の下端を拡張したすり鉢状の凹部３３も、
中間の逃げ部３２と同じく、貯油室として機能させるこ
とができる。[0007] The sintered oil-impregnated bearing 30 in this embodiment supports the rotating shaft 10 at both ends 31 of the shaft hole, and has a relief portion 32 between them to reduce the sliding area with the rotating shaft. Providing such a relief to avoid difficulties in finishing the inside diameter and increasing frictional resistance is a common means when the bearing is long.However, regardless of the length of the bearing, the relief is provided and the depth is increased. When the function of the oil storage chamber is also used, the life of the bearing can be extended. The mortar-shaped concave portion 33 which extends the lower end of the shaft hole also has
Like the intermediate relief portion 32, it can function as an oil storage chamber.
【０００８】従来のものと異なり、油留め輪２０の外側
面には複数枚の羽根２１が放射状に設けられ、遠心ファ
ンの羽根車（インペラ）を形成している。そして、その
上部空間は回転軸１０との間に隙間４５を残し、金属，
合成樹脂などの無孔性材質の蓋４４で覆ってある。この
蓋はフェルト５０からの油の漏れや蒸発を防ぐ役割もす
るが、軸受３０の上端面および保油材５０の内周面５１
と相俟ってインペラを囲み、遠心ファンのケーシングを
形成している。Unlike the conventional one, a plurality of blades 21 are radially provided on the outer surface of the oil retaining ring 20 to form a centrifugal fan impeller. The upper space leaves a gap 45 between the rotating shaft 10 and metal,
It is covered with a lid 44 made of a non-porous material such as a synthetic resin. Although this lid also serves to prevent oil from leaking and evaporating from the felt 50, the upper end surface of the bearing 30 and the inner peripheral surface 51 of the oil retaining material 50 are provided.
Together with this, it surrounds the impeller and forms the casing of the centrifugal fan.
【０００９】次に装置の作動について説明すると、潤滑
油は回転軸の回転につれて摺動面に滲出して潤滑作用を
行なう。その潤滑油の一部は回転軸を伝って漏れ出す
が、油留め輪の内側面によって遮られ、油留め輪の回転
に伴う遠心力によって振り切られて保油材５０の内周面
５１に付着する。一方、油留め輪はその外側面に設けた
羽根２１のために遠心ファンの羽根車として機能し、回
転軸と蓋の隙間４５から吸い込んだ外気を回転軸と直角
方向に，即ち保油材の内周面５１に吹き付ける。そして
ケーシング内の気圧が高まり、保油材および焼結含油軸
受の端面に圧力を及ぼす。保油材の内周面５１に付着し
ている潤滑油は、この風圧の作用で従来の毛管現象だけ
の場合よりも速かに吸収され、また、保油材５０から焼
結含油軸受３０への循環も促進される。Next, the operation of the apparatus will be described. Lubricating oil oozes out on the sliding surface as the rotating shaft rotates to perform a lubricating action. A part of the lubricating oil leaks along the rotating shaft, but is blocked by the inner surface of the oil retaining ring, shaken off by centrifugal force caused by the rotation of the oil retaining ring, and adheres to the inner peripheral surface 51 of the oil retaining material 50. I do. On the other hand, the oil retaining ring functions as an impeller of a centrifugal fan because of the blades 21 provided on the outer surface thereof, and sucks outside air sucked from a gap 45 between the rotating shaft and the lid in a direction perpendicular to the rotating shaft, that is, the oil retaining material. It is sprayed on the inner peripheral surface 51. Then, the pressure in the casing increases, and pressure is applied to the oil retaining material and the end face of the sintered oil-impregnated bearing. The lubricating oil adhering to the inner peripheral surface 51 of the oil retaining material is absorbed by the action of the wind pressure more quickly than in the case of the conventional capillary phenomenon alone. Circulation is also promoted.
【００１０】図３はインペラを兼ねる油留め輪２０の一
態様を示したもので、（イ）は蓋の方から見た平面図，
（ロ）は縦断面図である。図示のように油留め輪の内側
面の外径を外側面の外径より大きくして外周面を円錐状
にすると、内側面に付着した潤滑油の外側面への回り込
みを防ぐことができる。また、この外周面に鋸歯状の尖
鋭な凹凸を付けると、油留め輪が停止している際の油切
れが一段と良くなる。FIG. 3 shows an embodiment of an oil retaining ring 20 also serving as an impeller. (A) is a plan view seen from a lid,
(B) is a longitudinal sectional view. As shown in the drawing, if the outer diameter of the inner surface of the oil retaining ring is made larger than the outer diameter of the outer surface to make the outer surface conical, it is possible to prevent the lubricating oil attached to the inner surface from sneaking into the outer surface. Also, if the outer peripheral surface is provided with sharp irregularities having a saw-tooth shape, the running out of oil when the oil retaining ring is stopped is further improved.
【００１１】油留め輪の外側面には、図示の例では複数
枚の平らな羽根２１を放射状に配置したが、羽根の形状
は前述の如く遠心ファンの要領で、回転軸の回転方向な
どに応じて適宜に設定することができる。外気の吸い込
みを容易にするため、羽根の内側端部と回転軸との間に
空隙を設けることが好ましい。油留め輪の厚さはこの例
では一様な厚さにしてあるが、図４（実施例２）に示し
たような中心部が厚く末細りの形状でもよい。In the example shown in the figure, a plurality of flat blades 21 are radially arranged on the outer surface of the oil retaining ring, but the shape of the blades is changed in the direction of rotation of the rotating shaft in the manner of a centrifugal fan as described above. It can be set appropriately as needed. In order to facilitate the intake of outside air, it is preferable to provide a gap between the inner end of the blade and the rotating shaft. Although the thickness of the oil retaining ring is made uniform in this example, the oil retaining ring may have a tapered shape with a thick central portion as shown in FIG. 4 (Example 2).
【００１２】（実施例２） 前述の実施例では保油材５
０に軟質のフェルトを用いた関係で硬質の蓋４４を別に
要したのに対して、図４に示す例では、焼結含油軸受３
０の気孔よりも大きな径の気孔を有する硬質の多孔性部
材を用いて実施例１におけるフェルトと蓋とを一体にし
た形状の保油材５０を形成し、蓋に相当する上端面に封
孔処理を施して無孔質層５２を設け実施例１における蓋
４４の機能を持たせている。この構成によれば部品の点
数や組み立て工数が減少するという効果が得られる。硬
質の多孔性部材としては焼結金属，セラミックス，合成
樹脂などが用いられ、封孔処理の手段には、材質に応じ
て機械加工，ショットピーニング，樹脂または低融点金
属の含浸その他適宜の目潰し手段が用いられる。なお、
インペラからの風圧が高いために摺動面に滲出する潤滑
油が多すぎる場合には、焼結含油軸受３０の端面に接す
る底板４２に通気孔４３を設けて内圧を逃がし、潤滑油
の滲出を緩和することができる。(Embodiment 2) In the above embodiment, the oil retaining material 5
4, a hard cover 44 was separately required because of the use of soft felt, whereas in the example shown in FIG.
Using a hard porous member having pores having a diameter larger than the pores of No. 0, the oil retaining material 50 of the shape in which the felt and the lid in Example 1 are integrated is formed, and a seal is formed on the upper end surface corresponding to the lid. The non-porous layer 52 is provided by performing the treatment, and has the function of the lid 44 in the first embodiment. According to this configuration, the effect of reducing the number of parts and the number of assembling steps can be obtained. Sintered metal, ceramics, synthetic resin, etc. are used as the hard porous member, and the sealing means is machined, shot peened, impregnated with resin or low melting point metal or other appropriate crushing means depending on the material. Is used. In addition,
If too much lubricating oil oozes out on the sliding surface due to high wind pressure from the impeller, vent holes 43 are provided in the bottom plate 42 in contact with the end face of the sintered oil-impregnated bearing 30 to release internal pressure and to ooze out the lubricating oil. Can be eased.
【００１３】（実施例３） 次に、図５は回転軸１０が
ケースを貫通している形式の場合の実施例を示したもの
で、実施例１との相違点はインペラとしても機能する油
留め輪２０が焼結含油軸受３０を挟んで回転軸１０の両
側に設けられたことのみで、油留め輪それぞれに対応し
て保油材（フェルト）５０および蓋４４を設けること自
体は構成、作用効果ともに実施例１の場合と同様であ
る。図の左側では保油材（フェルト）５０の内面の形状
を、油留め輪２０の形状（断面台形）に合わせてすり鉢
型に変えてある。なお、図示の例では油留め輪２０と焼
結含油軸受３０の端面とが離れているが、この隙間の一
方または両方にスラストリングを入れるかまたは隙間を
無くして軸受の端面に摺接させることにより、油留め輪
を回転軸の軸方向の荷重を支えるスラスト受け板として
も機能させることができる。(Embodiment 3) Next, FIG. 5 shows an embodiment in a case where the rotating shaft 10 penetrates the case. The difference from Embodiment 1 is that the oil also functions as an impeller. Just because the retaining ring 20 is provided on both sides of the rotary shaft 10 with the sintered oil-impregnated bearing 30 interposed therebetween, the provision of the oil retaining material (felt) 50 and the lid 44 corresponding to each of the oil retaining rings is a configuration itself. The functions and effects are the same as those in the first embodiment. On the left side of the figure, the shape of the inner surface of the oil retaining material (felt) 50 is changed to a mortar shape in accordance with the shape (trapezoidal cross section) of the oil retaining ring 20. Although the oil retaining ring 20 and the end face of the sintered oil-impregnated bearing 30 are separated from each other in the illustrated example, a thrust ring is inserted into one or both of the gaps or the gap is eliminated so that the bearing is brought into sliding contact with the end face of the bearing. Thus, the oil retaining ring can also function as a thrust receiving plate that supports the load in the axial direction of the rotating shaft.
【００１４】[0014]
【発明の効果】この発明によれば、油留め輪（兼インペ
ラ）から吹き付ける空気がフェルトの内周面に付着して
いる潤滑油をフェルト内に押し込むので、軸受から漏れ
る油の回収〜循環が従来の毛管作用と相俟って、いっそ
う迅速確実に行なわれる。なおこの発明では既存の油留
め輪の外側面に羽根を設けてインペラとするので、部品
点数は増加せず、従って従来同様の工数，費用で組み立
てることができる。According to the present invention, the air blown from the oil retaining ring (also serving as an impeller) pushes the lubricating oil adhering to the inner peripheral surface of the felt into the felt. In combination with the conventional capillary action, it takes place more quickly and reliably. In the present invention, since the impeller is provided by providing the blade on the outer surface of the existing oil retaining ring, the number of parts is not increased, and therefore, the assembly can be performed with the same man-hour and cost as in the prior art.
【図１】この発明に係る含油軸受装置の一実施例を説明
する縦断面図である。FIG. 1 is a longitudinal sectional view illustrating an embodiment of an oil-impregnated bearing device according to the present invention.
【図２】従来の含油軸受装置を例示する縦断面図であ
る。FIG. 2 is a longitudinal sectional view illustrating a conventional oil-impregnated bearing device.
【図３】この発明における油留め輪の形状を例示する図
面である。FIG. 3 is a drawing illustrating the shape of an oil retaining ring in the present invention.
【図４】この発明の他の実施例を説明する図面である。FIG. 4 is a drawing explaining another embodiment of the present invention.
【図５】この発明の他の実施例を説明する図面である。FIG. 5 is a drawing explaining another embodiment of the present invention.
１０…回転軸，２０…油留め輪，２１…羽根，３０…多
孔質含油軸受（焼結含油軸受），３２…逃げ部，３３…
凹部，４０…ハウジング（軸受ケース），４１…スラス
ト受け板，４２…底板，４３…通気孔，４４…蓋，４５
…隙間，５０…保油材（フェルト），５１…内周面，５
２…無孔質層。DESCRIPTION OF SYMBOLS 10 ... Rotating shaft, 20 ... Oil retaining ring, 21 ... Blade, 30 ... Porous oil-impregnated bearing (sintered oil-impregnated bearing), 32 ... Escape part, 33 ...
Recesses, 40: Housing (bearing case), 41: Thrust receiving plate, 42: Bottom plate, 43: Vent hole, 44: Lid, 45
... gap, 50 ... oil retention material (felt), 51 ... inner peripheral surface, 5
2: Non-porous layer.
Claims (3)
０と、回転軸１０に固定されて一体に回転する油留め輪
２０と、油留め輪２０の内側面で振り切られ飛散する潤
滑油を吸着して含油軸受３０に循環させる保油材５０を
備える含油軸受装置において、油留め輪２０の外側面に
羽根２１を設けて遠心ファンの羽根車（インペラ）を形
成したことを特徴とする含油軸受装置。A porous oil-impregnated bearing for supporting a rotating shaft.
0, an oil retaining ring 20 fixed to the rotating shaft 10 and integrally rotating, and an oil retaining material 50 that adsorbs and circulates the lubricating oil that is shaken off and scattered on the inner surface of the oil retaining ring 20 to the oil-containing bearing 30. An oil-impregnated bearing device in which a blade 21 is provided on an outer surface of an oil retaining ring 20 to form an impeller of a centrifugal fan.
われ、この蓋と回転軸１０の隙間４５をインペラによる
空気の吸い込み口とする、請求項１に記載の含油軸受装
置。2. The oil-impregnated bearing device according to claim 1, wherein an upper portion of the oil retaining material 50 is covered with a non-porous lid 44, and a gap 45 between the lid and the rotating shaft 10 serves as an air suction port by an impeller. .
とが直接に摺接し、または両者の間に挟んだスラストリ
ングを介して摺接する、請求項１または請求項２に記載
の含油軸受装置。3. An end face of a sintered oil-impregnated bearing 30 and an oil retaining ring 20.
3. The oil-impregnated bearing device according to claim 1, wherein the oil-impregnated bearing device directly slides or slides through a thrust ring sandwiched therebetween. 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15149998A JPH11344034A (en) | 1998-06-01 | 1998-06-01 | Oil-retaining bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15149998A JPH11344034A (en) | 1998-06-01 | 1998-06-01 | Oil-retaining bearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11344034A true JPH11344034A (en) | 1999-12-14 |
Family
ID=15519853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15149998A Pending JPH11344034A (en) | 1998-06-01 | 1998-06-01 | Oil-retaining bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11344034A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6962458B2 (en) * | 2001-09-26 | 2005-11-08 | Komatsu Ltd. | Coupling device for equipment implement |
| JP2009127860A (en) * | 2007-11-22 | 2009-06-11 | Taida Electronic Ind Co Ltd | Motor, and its bearing structure |
| US8100673B2 (en) | 2008-02-29 | 2012-01-24 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | Cooling fan |
| CN110686068A (en) * | 2019-11-22 | 2020-01-14 | 南京高速齿轮制造有限公司 | Wind power gear box |
-
1998
- 1998-06-01 JP JP15149998A patent/JPH11344034A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6962458B2 (en) * | 2001-09-26 | 2005-11-08 | Komatsu Ltd. | Coupling device for equipment implement |
| JP2009127860A (en) * | 2007-11-22 | 2009-06-11 | Taida Electronic Ind Co Ltd | Motor, and its bearing structure |
| US8100673B2 (en) | 2008-02-29 | 2012-01-24 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | Cooling fan |
| CN110686068A (en) * | 2019-11-22 | 2020-01-14 | 南京高速齿轮制造有限公司 | Wind power gear box |
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