JP4250968B2 - DYNAMIC PRESSURE BEARING MANUFACTURING METHOD AND DYNAMIC PRESSURE BEARING MANUFACTURING DEVICE - Google Patents

DYNAMIC PRESSURE BEARING MANUFACTURING METHOD AND DYNAMIC PRESSURE BEARING MANUFACTURING DEVICE Download PDF

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JP4250968B2
JP4250968B2 JP2003027096A JP2003027096A JP4250968B2 JP 4250968 B2 JP4250968 B2 JP 4250968B2 JP 2003027096 A JP2003027096 A JP 2003027096A JP 2003027096 A JP2003027096 A JP 2003027096A JP 4250968 B2 JP4250968 B2 JP 4250968B2
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JP2004239309A (en
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高橋　　毅
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JTEKT Corp
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Description

【０００１】
【発明の属する技術分野】
この発明は、動圧軸受の製造方法および動圧軸受の製造装置に関する。
【０００２】
【従来の技術】
従来、動圧軸受装置においては、軸受に充填した潤滑剤が大気に触れる部分(開放部)に、撥油剤をバリヤーフィルムとして塗布して、開放部から潤滑剤が漏れるのを防止していた。
【０００３】
この撥油剤の塗布方法としては、通常、軸(シャフト)をハウジング(スリーブ)に組み込む前に、軸およびスリーブにそれぞれ撥油剤を塗布していた。
【０００４】
なお、真直な軸に撥油剤を塗布した場合には、軸をスリーブに挿入する際に、軸に塗布した撥油剤が剥がれ、この剥がれた撥油剤が動圧軸受に悪影響を及ぼすので、軸には溝などの段差を設け、この段差を目印にして、撥油剤を塗布すると共に段差に撥油剤を塗布することで、撥油剤の剥がれを防いでいた。
【０００５】
【特許文献１】
実用新案登録第２５９１９３２号公報
【０００６】
【発明が解決しようとする課題】
これに対し、軸をスリーブに組み込んだ後に、軸およびスリーブに撥油剤を塗布する場合には、スリーブに軸を挿入する際の撥油剤の剥がれが起こらないから、軸に段差を設ける必要は無くなる。
【０００７】
ところで、この場合、動圧軸受に撥油剤を円周方向に塗布するには、動圧軸受を回転させながら塗布すれば、塗布部材を静止させた状態で塗布できるが、動圧軸受は軸とスリーブとが相対回転する機構であるので、スリーブを回転させても軸は必ずしもスリーブと同期回転するとは限らない。このため、軸とスリーブは静止状態とし、塗布部材を軸の外周に回転させて軸の周面に撥油剤を塗布していた。このため、軸へ撥油剤を塗布し難い上に手間が掛かっていた。
【０００８】
そこで、この発明の目的は、段差のない真直な軸部材でも剥がれなく容易に撥油剤を塗布できる動圧軸受の製造方法および動圧軸受の製造装置を提供することにある。
【０００９】
【課題を解決するための手段】
上記目的を達成するため、一参考例の動圧軸受の製造方法は、ハウジング内の軸受部に軸部材の被支持部が相対回転自在に支持されると共に、上記軸受部と上記被支持部が潤滑剤によって潤滑され、上記軸部材は上記ハウジングから露出する露出部を有する動圧軸受の製造方法であって、
上記ハウジングに上記軸部材を組み込んだ状態で、上記軸部材の上記露出部と、上記ハウジングのうちの上記露出部周辺とに、同時に、撥油剤を塗布することを特徴としている。
【００１０】
この一参考例では、上記ハウジングに上記軸部材を組み込んだ状態で、上記軸部材の上記露出部と、上記ハウジングのうちの上記露出部周辺とに、同時に、上記潤滑剤に対して濡れ性の悪い撥油剤を塗布する。
【００１１】
この一参考例では、軸部材とハウジングとをそれぞれ別工程で撥油剤を塗布していた従来例と異なり、軸部材とハウジングの両方に同時に撥油剤を塗布するので撥油剤の塗布工程が簡便になる。また、上記ハウジングに上記軸部材を組み込んだ状態で、撥油剤を塗布するので、段差のない真直な軸部材であっても、組み込み時に撥油剤が剥がれるという現象は起こらないと共に、軸部材に目印がなくても撥油剤を容易に塗布できる。
【００１２】
また、請求項１の発明は、ハウジング内の軸受部に軸部材の被支持部が相対回転自在に支持されると共に、上記軸受部と上記被支持部が潤滑剤によって潤滑され、上記軸部材は上記ハウジングから露出する露出部を有する動圧軸受の製造方法であって、
上記ハウジングに上記軸部材を組み込んだ状態で、上記軸部材の上記露出部と、上記ハウジングのうちの上記露出部周辺とに、同時に、撥油剤を塗布し、
上記軸部材の露出部と上記ハウジングを、それぞれ、静圧空気軸受で支持し、
撥油剤を含浸させた多孔質の材料からなる回転する円盤を、上記軸部材の上記露出部と上記ハウジングの上記露出部周辺とに接触させて、
上記撥油剤を上記露出部と上記露出部周辺とに塗布することを特徴としている。
【００１３】
この請求項１の発明では、撥油剤を含浸させた多孔質の材料からなる円盤を、上記軸部材の上記露出部と上記ハウジングの上記露出部周辺とに接触させながら回転させて、上記撥油剤を上記露出部と上記露出部周辺とに同時に塗布する。これにより、軸部材とハウジングとをすべりを生じさせることなく同期回転させることができ、潤滑剤が未充填であっても撥油剤塗布工程で軸受に損傷を与えることがない。したがって、潤滑剤を軸受に注入する前に、軸部材とハウジングとに同時に撥油剤を塗布できることになる。また、潤滑剤を軸受に注入した後に、上記撥油剤の効果でもって、軸受の外の潤滑剤をクリーニングし易くなる。なお、多孔質の材料としてはフェルト材料、綿布、化学繊維等が有る。
【００１４】
また、一参考例の動圧軸受の製造装置は、ハウジング内の軸受部に軸部材の被支持部が相対回転自在に支持されると共に、上記軸受部と上記被支持部が潤滑剤によって潤滑され、上記軸部材は上記ハウジングから露出する露出部を有する動圧軸受の製造装置であって、
上記ハウジングに上記軸部材を組み込んだ状態で、上記ハウジングと上記軸部材とを回転自在に支持する支持部と、
上記ハウジングと上記軸部材とに回転力を与えながら、上記軸部材の上記露出部と上記ハウジングのうちの上記露出部周辺とに、撥油剤を塗布する塗布部とを備えたことを特徴としている。
【００１５】
この一参考例では、上記支持部は、上記ハウジングに上記軸部材を組み込んだ状態で、上記ハウジングと上記軸部材とを相対回転自在に支持する。また、上記塗布部は、上記ハウジングと上記軸部材とに回転力を与えながら、上記軸部材の上記露出部と上記ハウジングのうちの上記露出部周辺とに、上記潤滑剤に対して濡れ性の悪い撥油剤を塗布する。これにより、軸部材とハウジングの両方に同時に撥油剤を塗布できて、撥油剤の塗布工程が簡便になる。また、上記ハウジングに上記軸部材を組み込んだ状態で、撥油剤を塗布するので、真直な軸部材であっても、組み込み時に撥油剤が剥がれるという現象は起こらないと共に、軸部材に目印がなくても撥油剤を容易に塗布できる。
【００１６】
また、請求項２の発明は、ハウジング内の軸受部に軸部材の被支持部が相対回転自在に支持されると共に、上記軸受部と上記被支持部が潤滑剤によって潤滑され、上記軸部材は上記ハウジングから露出する露出部を有する動圧軸受の製造装置であって、
上記ハウジングに上記軸部材を組み込んだ状態で、上記ハウジングと上記軸部材とを回転自在に支持する支持部と、
上記ハウジングと上記軸部材とに回転力を与えながら、上記軸部材の上記露出部と上記ハウジングのうちの上記露出部周辺とに、撥油剤を塗布する塗布部とを備え、
上記支持部は静圧軸受を有し、
上記塗布部は、上記軸部材の上記露出部と上記ハウジングの上記露出部周辺とに接触しながら回転すると共に、撥油剤を含浸させる多孔質のフェルト材料からなる円盤を有することを特徴としている。
【００１７】
この請求項２の発明では、上記塗布部は、撥油剤を含浸させた多孔質の材料からなる円盤を、上記軸部材の上記露出部と上記ハウジングの上記露出部周辺とに接触させながら回転させて、上記撥油剤を上記露出部と上記露出部周辺とに同時に塗布する。この円盤との摩擦による回転力が与えられ、軸部材とハウジングとをすべりを生じさせることなく同期回転させることができ、潤滑剤が未充填であっても撥油剤塗布工程で軸受に損傷を与えることがない。したがって、潤滑剤を軸受に注入する前に、軸部材とハウジングとに撥油剤を塗布できることになる。また、潤滑剤を軸受に注入した後に、上記撥油剤の効果でもって、軸受の外の潤滑剤をクリーニングし易くなる。
【００１８】
【発明の実施の形態】
以下、この発明を図示の実施の形態に基いて詳細に説明する。
【００１９】
図１に、この発明の動圧軸受の製造装置の実施形態を示す。この実施形態は、動圧軸受１０に撥油剤を塗布する装置である。この動圧軸受１０はハウジング１と軸部材３を備え、このハウジング１内の軸受部２に軸部材３の被支持部３Ａが挿入される。また、この軸受部２と被支持部３Ａとの間に潤滑剤として例えばシリコン系のオイル(図示せず)が充填され、この潤滑剤でもって軸受部２と被支持部３Ａとが相対回転自在に潤滑される。また、上記軸部材３はハウジング１の軸方向の一方の端面１Ａから露出した露出部３Ｂを有する。また、上記軸部材３の被支持部３Ａの外周面もしくは上記ハウジング１の軸受部２の周面の少なくとも一方には、ラジアル動圧溝(図示せず)が形成されている。
【００２０】
この実施形態の装置は、軸部材３の露出部３Ｂの端面３Ｂ−１に軸方向に当接される当接部１１を含む第１支持部１２を備える。この第１支持部１２は、当接部１１から軸方向に延在する支持捧１３およびこの支持捧１３の外周に配置され、この支持捧１３を径方向に支持する静圧空気軸受１５を有する。また、この第１支持部１２は、静圧空気軸受１５と当接部１１との間で、支持捧１３の外周に配されたコイルばね１６を有する。このコイルばね１６は、上記静圧空気軸受１５に対して上記当接部１１を軸部材３の端面３Ｂ−１に向かって軸方向に付勢する。
【００２１】
また、この実施形態の装置は、上記ハウジング１の底面１Ｂおよび外周面１Ｃに嵌合する嵌合部１７を含む第２支持部１８を備える。この第２支持部１８は、上記嵌合部１７から軸方向に延在する捧部２０と、この捧部２０を径方向に支持する静圧空気軸受２１を有する。上記第１支持部１２と第２支持部１８が支持部を構成している。
【００２２】
また、この実施形態の装置は、撥油剤として例えばポリテトラフルオロエチレン(ＰＴＦＥ)と揮発性溶剤との混合物を含浸させる多孔質のフェルト材料からなる薄板円盤２２を有する。この撥油剤は上記潤滑剤をはじく性質を有している。この薄板円盤２２は、モータ２３の回転駆動軸２３Ａに接続され、回転中心軸ｊを中心にして回転される。この薄板円盤２２の外周面２２Ａは、動圧軸受１０の軸部材３の露出部３Ｂの外周面３Ｂ−２に摩擦接触しながら回転し、薄板円盤２２の外周縁部２２Ｂはハウジング１の軸方向の端面１Ａのうちの露出部３Ｂに隣接する周辺部１Ａ−１に摩擦接触しながら回転する。
【００２３】
また、上記薄板円盤２２は、上記動圧軸受１０と接触する位置の反対側の位置において、撥油剤溜め部２５に溜めた撥油剤２６に浸せきされている。この薄板円盤２２とモータ２３および撥油剤溜め部２５が塗布部を構成している。なお、上記静圧空気軸受１５および２１と上記モータ２３および溜め部２５はフレーム等(図示せず)に取り付けられて図示の位置に支持固定されている。
【００２４】
上記構成の動圧軸受の製造装置によれば、第１支持部１２と第２支持部１８は、ハウジング１に軸部材３を組み込んだ状態で、軸部材３とハウジング１とを回転自在に支持する。
【００２５】
また、上記薄板円盤２２は、モータ２３に駆動されて、外周面２２Ａを軸部材３の露出部３Ｂの外周面３Ｂ−２に摩擦接触させ、外周縁部２２Ｂをハウジング１の端面１Ａのうちの露出部３Ｂの周辺部１Ａ−１に摩擦接触させながら、ハウジング１と軸部材３とに回転力を与える。同時に、薄板円盤２２は、軸部材３の露出部３Ｂとハウジング１のうちの露出部３Ｂの周辺部１Ａ−１とに、上記潤滑剤に対して濡れ性の悪い撥油剤２６を塗布する。これにより、軸部材３とハウジング１の両方に同時に撥油剤２６を塗布できて、撥油剤２６の塗布工程が簡便になる。また、ハウジング１に軸部材３を組み込んだ状態で、撥油剤を塗布するので、真直な軸部材３であっても、組み込み時に撥油剤が剥がれる現象は起こらないと共に、軸部材３に目印がなくても撥油剤を容易に塗布できる。
【００２６】
また、この実施形態では、上記撥油剤２６を含浸させた多孔質のフェルト材料からなる薄板円盤２２を、軸部材３の露出部３Ｂとハウジング１の周辺部１Ａ−１とに接触させて回転させる。これにより、軸部材３とハウジング１とをすべりを生じさせることなく同期回転させることができ、潤滑剤が未充填であっても撥油剤塗布工程で動圧軸受１０に損傷を与えることがない。したがって、潤滑剤を動圧軸受１０に注入する前に、軸部材３とハウジング１とに撥油剤２６を同時に塗布できることになる。また、潤滑剤を動圧軸受１０に注入した後に、撥油剤２６の効果でもって、軸受部２の外の潤滑剤をクリーニングし易くなる。
【００２７】
尚、上記実施形態では、ハウジング１と軸部材３を支持する支持部として静圧空気軸受１５,２１を用いたが、他のすべり軸受や転がり軸受を使用した場合は参考例となる。また、上記実施形態では、塗布部として、多孔質のフェルト材料からなる薄板円盤２２を用いたが、塗布部としては、ハウジング１と軸部材３とに回転力を与えて同期回転させることができると共に軸部材３の露出部３Ｂとハウジング１の周辺部１Ａ−１とに撥油剤を同時塗布できるものであればよい。例えば、塗布部の円盤２２の材質として、フェルト材料に替えて、スポンジ,綿布,多孔質ゴム,化学繊維等を採用してもよい。また、上記実施形態では、撥油剤として、ポリテトラフルオロエチレン(ＰＴＦＥ)と揮発性溶剤との混合物を使用したが、フッ素系グリース等のフッ素系撥油剤を採用してもよい。
【００２８】
【発明の効果】
以上より明らかなように、この発明の動圧軸受の製造方法は、ハウジングに軸部材を組み込んだ状態で、軸部材の露出部と、ハウジングのうちの露出部周辺とに、同時に、潤滑剤に対して濡れ性の悪い撥油剤を塗布する。したがって、本発明では、軸部材とハウジングとをそれぞれ別工程で撥油剤を塗布していた従来例と異なり、撥油剤の塗布工程が簡便になる。また、上記ハウジングに上記軸部材を組み込んだ状態で、撥油剤を塗布するので、真直な軸部材であっても、組み込み時に撥油剤が剥がれるという現象は起こらないと共に、軸部材に目印がなくても撥油剤を容易に塗布できる。
【図面の簡単な説明】
【図１】 この発明の動圧軸受の製造装置の実施形態を示す模式図である。
【符号の説明】
１ ハウジング
１Ａ 端面
１Ａ−１ 周辺部
２ 軸受部
３ 軸部材
３Ａ 被支持部
３Ｂ 露出部
３Ｂ−１ 端面
１０ 動圧軸受
１１ 当接部
１２ 第１支持部
１３ 支持捧
１５,２１ 静圧空気軸受
１６ コイルばね
１７ 嵌合部
１８ 第２支持部
２０ 捧部
２２ 薄板円盤
２２Ａ 外周面
２２Ｂ 外周縁部
２３ モータ
２５ 撥油剤溜め部
２６ 撥油剤[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a fluid dynamic bearing and a device for manufacturing the fluid dynamic bearing.
[0002]
[Prior art]
Conventionally, in a hydrodynamic bearing device, an oil repellent agent is applied as a barrier film to a portion (open portion) where the lubricant filled in the bearing comes into contact with the atmosphere to prevent the lubricant from leaking from the open portion.
[0003]
As a method for applying the oil repellent, the oil repellent is usually applied to the shaft and the sleeve before the shaft (shaft) is incorporated into the housing (sleeve).
[0004]
When an oil repellent is applied to a straight shaft, the oil repellent applied to the shaft is peeled off when the shaft is inserted into the sleeve, and the peeled oil repellent adversely affects the hydrodynamic bearing. Provided a step such as a groove, and applied the oil repellent and applied the oil repellent to the step to prevent the oil repellent from peeling off.
[0005]
[Patent Document 1]
Utility Model Registration No. 2591932 Publication [0006]
[Problems to be solved by the invention]
On the other hand, when the oil repellent is applied to the shaft and the sleeve after the shaft is incorporated into the sleeve, the oil repellent is not peeled off when the shaft is inserted into the sleeve, so there is no need to provide a step on the shaft. .
[0007]
By the way, in this case, in order to apply the oil repellent to the dynamic pressure bearing in the circumferential direction, the application member can be applied in a stationary state by applying it while rotating the dynamic pressure bearing. Since the mechanism rotates relative to the sleeve, the shaft does not necessarily rotate synchronously with the sleeve even if the sleeve is rotated. For this reason, the shaft and the sleeve are in a stationary state, and the application member is rotated around the outer periphery of the shaft to apply the oil repellent to the peripheral surface of the shaft. For this reason, it is difficult to apply the oil repellent to the shaft, and it takes time and effort.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a method of manufacturing a hydrodynamic bearing and an apparatus for manufacturing a hydrodynamic bearing capable of easily applying an oil repellent without peeling off even a straight shaft member having no level difference.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a hydrodynamic bearing manufacturing method according to a reference example includes a supported portion of a shaft member supported on a bearing portion in a housing so as to be relatively rotatable, and the bearing portion and the supported portion are Lubricated with a lubricant, the shaft member is a method of manufacturing a hydrodynamic bearing having an exposed portion exposed from the housing,
An oil repellent agent is simultaneously applied to the exposed portion of the shaft member and the periphery of the exposed portion of the housing in a state where the shaft member is incorporated in the housing.
[0010]
In this reference example , with the shaft member incorporated in the housing, the exposed portion of the shaft member and the periphery of the exposed portion of the housing are simultaneously wettable with respect to the lubricant. Apply bad oil repellent.
[0011]
In this reference example , the oil repellent is applied to both the shaft member and the housing simultaneously, unlike the conventional example in which the oil repellent is applied to the shaft member and the housing in separate processes. Become. In addition, since the oil repellent is applied in a state where the shaft member is assembled in the housing, even if the shaft member is a straight shaft member without a step, the phenomenon that the oil repellent agent is not peeled off during the assembly does not occur, and the shaft member is marked. The oil repellent can be easily applied even if there is no water.
[0012]
According to a first aspect of the present invention, the supported portion of the shaft member is supported by the bearing portion in the housing so as to be relatively rotatable, the bearing portion and the supported portion are lubricated by a lubricant, and the shaft member is A method of manufacturing a hydrodynamic bearing having an exposed portion exposed from the housing,
In a state where the shaft member is incorporated in the housing, an oil repellent is applied simultaneously to the exposed portion of the shaft member and the periphery of the exposed portion of the housing,
The exposed portion of the shaft member and the housing are each supported by a static pressure air bearing,
A rotating disk made of a porous material impregnated with an oil repellent is brought into contact with the exposed portion of the shaft member and the periphery of the exposed portion of the housing,
The oil repellent is applied to the exposed portion and the periphery of the exposed portion.
[0013]
In the first aspect of the present invention, a disk made of a porous material impregnated with an oil repellent agent is rotated while contacting the exposed portion of the shaft member and the periphery of the exposed portion of the housing, thereby the oil repellent agent. Is simultaneously applied to the exposed portion and the periphery of the exposed portion. As a result, the shaft member and the housing can be rotated synchronously without causing any slip, and even if the lubricant is not filled, the bearing is not damaged in the oil repellent application step. Therefore, the oil repellent can be applied to the shaft member and the housing at the same time before the lubricant is injected into the bearing. Further, after the lubricant is injected into the bearing, the lubricant outside the bearing can be easily cleaned due to the effect of the oil repellent. Examples of the porous material include felt material, cotton cloth, and chemical fiber.
[0014]
Further, in the hydrodynamic bearing manufacturing apparatus of one reference example, the supported portion of the shaft member is supported by the bearing portion in the housing so as to be relatively rotatable, and the bearing portion and the supported portion are lubricated by a lubricant. The shaft member is a hydrodynamic bearing manufacturing apparatus having an exposed portion exposed from the housing,
A support portion that rotatably supports the housing and the shaft member in a state in which the shaft member is incorporated in the housing;
An application portion for applying an oil repellent agent is provided around the exposed portion of the shaft member and around the exposed portion of the housing while applying a rotational force to the housing and the shaft member. .
[0015]
In this reference example , the support portion supports the housing and the shaft member in a relatively rotatable manner in a state where the shaft member is incorporated in the housing. In addition, the application portion is wettable with respect to the lubricant on the exposed portion of the shaft member and around the exposed portion of the housing while applying a rotational force to the housing and the shaft member. Apply bad oil repellent. Thus, the oil repellent can be applied to both the shaft member and the housing at the same time, and the oil repellent application process is simplified. Also, since the oil repellent is applied in the state where the shaft member is assembled in the housing, even if it is a straight shaft member, the phenomenon that the oil repellent is not peeled off at the time of incorporation does not occur, and there is no mark on the shaft member. The oil repellent can be easily applied.
[0016]
According to a second aspect of the present invention, the supported portion of the shaft member is supported by the bearing portion in the housing so as to be relatively rotatable, and the bearing portion and the supported portion are lubricated by a lubricant. A hydrodynamic bearing manufacturing apparatus having an exposed portion exposed from the housing,
A support portion that rotatably supports the housing and the shaft member in a state in which the shaft member is incorporated in the housing;
An application portion for applying an oil repellent agent to the exposed portion of the shaft member and the periphery of the exposed portion of the housing while applying a rotational force to the housing and the shaft member;
The support has a hydrostatic bearing,
The application portion includes a disk made of a porous felt material that rotates while contacting the exposed portion of the shaft member and the periphery of the exposed portion of the housing and is impregnated with an oil repellent.
[0017]
In the invention of claim 2, the application part rotates a disk made of a porous material impregnated with an oil repellent agent while contacting the exposed part of the shaft member and the periphery of the exposed part of the housing. The oil repellent is applied simultaneously to the exposed portion and the periphery of the exposed portion. A rotational force is applied by friction with the disk, the shaft member and the housing can be rotated synchronously without causing slippage, and even if the lubricant is not filled, the bearing is damaged in the oil repellent application process. There is nothing. Therefore, the oil repellent agent can be applied to the shaft member and the housing before injecting the lubricant into the bearing. Further, after the lubricant is injected into the bearing, the lubricant outside the bearing can be easily cleaned due to the effect of the oil repellent.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on the illustrated embodiments.
[0019]
FIG. 1 shows an embodiment of a hydrodynamic bearing manufacturing apparatus according to the present invention. In this embodiment, an oil repellent agent is applied to the dynamic pressure bearing 10. The dynamic pressure bearing 10 includes a housing 1 and a shaft member 3, and a supported portion 3 </ b> A of the shaft member 3 is inserted into a bearing portion 2 in the housing 1. Further, for example, silicon-based oil (not shown) is filled between the bearing portion 2 and the supported portion 3A as a lubricant, and the bearing portion 2 and the supported portion 3A can be relatively rotated with this lubricant. To be lubricated. The shaft member 3 has an exposed portion 3B exposed from one end surface 1A in the axial direction of the housing 1. A radial dynamic pressure groove (not shown) is formed on at least one of the outer peripheral surface of the supported portion 3A of the shaft member 3 or the peripheral surface of the bearing portion 2 of the housing 1.
[0020]
The apparatus of this embodiment includes a first support portion 12 including an abutting portion 11 that abuts the end surface 3B-1 of the exposed portion 3B of the shaft member 3 in the axial direction. The first support part 12 includes a support bar 13 extending in the axial direction from the contact part 11 and an outer periphery of the support bar 13 and a hydrostatic air bearing 15 that supports the support bar 13 in the radial direction. . The first support portion 12 includes a coil spring 16 disposed on the outer periphery of the support element 13 between the hydrostatic air bearing 15 and the contact portion 11. The coil spring 16 urges the contact portion 11 against the hydrostatic air bearing 15 in the axial direction toward the end surface 3B-1 of the shaft member 3.
[0021]
In addition, the apparatus of this embodiment includes a second support portion 18 including a fitting portion 17 that fits to the bottom surface 1B and the outer peripheral surface 1C of the housing 1. The second support portion 18 includes a dedicated portion 20 that extends in the axial direction from the fitting portion 17 and a hydrostatic air bearing 21 that supports the dedicated portion 20 in the radial direction. The said 1st support part 12 and the 2nd support part 18 comprise the support part.
[0022]
In addition, the apparatus of this embodiment has a thin disk 22 made of a porous felt material impregnated with, for example, a mixture of polytetrafluoroethylene (PTFE) and a volatile solvent as an oil repellent. This oil repellent has the property of repelling the lubricant. This thin disk 22 is connected to a rotation drive shaft 23A of a motor 23 and is rotated about a rotation center axis j. The outer peripheral surface 22A of the thin plate disk 22 rotates while being in frictional contact with the outer peripheral surface 3B-2 of the exposed portion 3B of the shaft member 3 of the dynamic pressure bearing 10, and the outer peripheral portion 22B of the thin plate disk 22 is in the axial direction of the housing 1. The peripheral surface 1A-1 adjacent to the exposed portion 3B of the end surface 1A of the first end surface 1A rotates while being in frictional contact.
[0023]
The thin disk 22 is immersed in an oil repellent 26 stored in an oil repellent reservoir 25 at a position opposite to the position in contact with the dynamic pressure bearing 10. The thin disk 22, the motor 23, and the oil repellent reservoir 25 constitute an application part. The hydrostatic air bearings 15 and 21, the motor 23 and the reservoir 25 are attached to a frame or the like (not shown) and supported and fixed at the positions shown.
[0024]
According to the dynamic pressure bearing manufacturing apparatus having the above-described configuration, the first support portion 12 and the second support portion 18 rotatably support the shaft member 3 and the housing 1 in a state where the shaft member 3 is incorporated in the housing 1. To do.
[0025]
Further, the thin disc 22 is driven by the motor 23 to bring the outer peripheral surface 22A into frictional contact with the outer peripheral surface 3B-2 of the exposed portion 3B of the shaft member 3, and the outer peripheral portion 22B of the end surface 1A of the housing 1 A rotational force is applied to the housing 1 and the shaft member 3 while making frictional contact with the peripheral portion 1A-1 of the exposed portion 3B. At the same time, the thin disc 22 applies the oil repellent 26 having poor wettability to the lubricant to the exposed portion 3B of the shaft member 3 and the peripheral portion 1A-1 of the exposed portion 3B of the housing 1. Accordingly, the oil repellent 26 can be applied to both the shaft member 3 and the housing 1 at the same time, and the application process of the oil repellent 26 is simplified. Further, since the oil repellent is applied in the state in which the shaft member 3 is assembled in the housing 1, even if the shaft member 3 is straight, the phenomenon that the oil repellent is peeled off during the incorporation does not occur, and there is no mark on the shaft member 3. However, the oil repellent can be easily applied.
[0026]
Further, in this embodiment, the thin disk 22 made of a porous felt material impregnated with the oil repellent 26 is rotated in contact with the exposed portion 3B of the shaft member 3 and the peripheral portion 1A-1 of the housing 1. . As a result, the shaft member 3 and the housing 1 can be rotated synchronously without causing slippage, and even if the lubricant is not filled, the hydrodynamic bearing application process is not damaged. Therefore, the oil repellent 26 can be simultaneously applied to the shaft member 3 and the housing 1 before injecting the lubricant into the dynamic pressure bearing 10. Further, after injecting the lubricant into the dynamic pressure bearing 10, the lubricant outside the bearing portion 2 can be easily cleaned by the effect of the oil repellent 26.
[0027]
In the above-described embodiment, the static pressure air bearings 15 and 21 are used as the support portions that support the housing 1 and the shaft member 3. However, when other slide bearings or rolling bearings are used , this is a reference example . Moreover, in the said embodiment, although the thin disc 22 which consists of porous felt materials was used as an application | coating part, as an application | coating part, a rotational force can be given to the housing 1 and the shaft member 3, and it can be rotated synchronously. In addition, any oil repellent may be applied to the exposed portion 3B of the shaft member 3 and the peripheral portion 1A-1 of the housing 1 at the same time. For example, instead of the felt material, sponge, cotton cloth, porous rubber, chemical fiber, or the like may be employed as the material of the disk 22 of the application part. In the above embodiment, a mixture of polytetrafluoroethylene (PTFE) and a volatile solvent is used as the oil repellent. However, a fluorine-based oil repellent such as a fluorine-based grease may be employed.
[0028]
【The invention's effect】
As is clear from the above, the method of manufacturing the hydrodynamic bearing according to the present invention allows the lubricant to be applied to the exposed portion of the shaft member and the periphery of the exposed portion of the housing simultaneously with the shaft member incorporated in the housing. Apply an oil repellent with poor wettability. Therefore, in the present invention, unlike the conventional example in which the oil repellent is applied to the shaft member and the housing in separate steps, the oil repellent application step is simplified. Also, since the oil repellent is applied in the state where the shaft member is assembled in the housing, even if it is a straight shaft member, the phenomenon that the oil repellent is not peeled off at the time of incorporation does not occur, and there is no mark on the shaft member. The oil repellent can be easily applied.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment of a hydrodynamic bearing manufacturing apparatus according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 1A End surface 1A-1 Peripheral part 2 Bearing part 3 Shaft member 3A Supported part 3B Exposed part 3B-1 End surface 10 Dynamic pressure bearing 11 Abutting part 12 First support part 13 Support 15, 21 Hydrostatic air bearing 16 Coil spring 17 Fitting part 18 Second support part 20 Dedicated part 22 Thin disk 22A Outer peripheral surface 22B Outer peripheral part 23 Motor 25 Oil repellent reservoir 26 Oil repellent

Claims (2)

ハウジング内の軸受部に軸部材の被支持部が相対回転自在に支持されると共に、上記軸受部と上記被支持部が潤滑剤によって潤滑され、上記軸部材は上記ハウジングから露出する露出部を有する動圧軸受の製造方法であって、
上記ハウジングに上記軸部材を組み込んだ状態で、上記軸部材の上記露出部と、上記ハウジングのうちの上記露出部周辺とに、同時に、撥油剤を塗布し、
上記軸部材の露出部と上記ハウジングを、それぞれ、静圧空気軸受で支持し、
撥油剤を含浸させた多孔質の材料からなる円盤を、上記軸部材の上記露出部と上記ハウジングの上記露出部周辺とに接触させながら回転させて、
上記撥油剤を上記露出部と上記露出部周辺とに塗布することを特徴とする動圧軸受の製造方法。 A supported portion of the shaft member is supported by a bearing portion in the housing so as to be relatively rotatable, the bearing portion and the supported portion are lubricated by a lubricant, and the shaft member has an exposed portion exposed from the housing. A method of manufacturing a hydrodynamic bearing,
In a state where the shaft member is incorporated in the housing, an oil repellent is applied simultaneously to the exposed portion of the shaft member and the periphery of the exposed portion of the housing,
The exposed portion of the shaft member and the housing are each supported by a static pressure air bearing,
A disk made of a porous material impregnated with an oil repellent is rotated while contacting the exposed portion of the shaft member and the periphery of the exposed portion of the housing,
A method of manufacturing a hydrodynamic bearing, wherein the oil repellent is applied to the exposed portion and the periphery of the exposed portion. ハウジング内の軸受部に軸部材の被支持部が相対回転自在に支持されると共に、上記軸受部と上記被支持部が潤滑剤によって潤滑され、上記軸部材は上記ハウジングから露出する露出部を有する動圧軸受の製造装置であって、
上記ハウジングに上記軸部材を組み込んだ状態で、上記ハウジングと上記軸部材とを回転自在に支持する支持部と、
上記ハウジングと上記軸部材とに回転力を与えながら、上記軸部材の上記露出部と上記ハウジングのうちの上記露出部周辺とに、撥油剤を塗布する塗布部とを備え、
上記支持部は静圧軸受を有し、
上記塗布部は、上記軸部材の上記露出部と上記ハウジングの上記露出部周辺とに接触しながら回転すると共に、撥油剤を含浸させる多孔質の材料からなる円盤を有することを特徴とする動圧軸受の製造装置。 A supported portion of the shaft member is supported by a bearing portion in the housing so as to be relatively rotatable, the bearing portion and the supported portion are lubricated by a lubricant, and the shaft member has an exposed portion exposed from the housing. A hydrodynamic bearing manufacturing apparatus,
A support portion that rotatably supports the housing and the shaft member in a state in which the shaft member is incorporated in the housing;
An application portion for applying an oil repellent agent to the exposed portion of the shaft member and the periphery of the exposed portion of the housing while applying a rotational force to the housing and the shaft member;
The support has a hydrostatic bearing,
The application portion includes a disk made of a porous material that rotates while contacting the exposed portion of the shaft member and the periphery of the exposed portion of the housing and is impregnated with an oil repellent. Bearing manufacturing equipment.
JP2003027096A 2003-02-04 2003-02-04 DYNAMIC PRESSURE BEARING MANUFACTURING METHOD AND DYNAMIC PRESSURE BEARING MANUFACTURING DEVICE Expired - Fee Related JP4250968B2 (en)

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