JP2008089097A5 - - Google Patents

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JP2008089097A5
JP2008089097A5 JP2006271422A JP2006271422A JP2008089097A5 JP 2008089097 A5 JP2008089097 A5 JP 2008089097A5 JP 2006271422 A JP2006271422 A JP 2006271422A JP 2006271422 A JP2006271422 A JP 2006271422A JP 2008089097 A5 JP2008089097 A5 JP 2008089097A5
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Japan
Prior art keywords
bearing
bearing member
annular groove
outer periphery
oil
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JP2006271422A
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Japanese (ja)
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JP2008089097A (en
JP4724086B2 (en
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Priority to JP2006271422A priority Critical patent/JP4724086B2/en
Priority claimed from JP2006271422A external-priority patent/JP4724086B2/en
Publication of JP2008089097A publication Critical patent/JP2008089097A/en
Publication of JP2008089097A5 publication Critical patent/JP2008089097A5/ja
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Publication of JP4724086B2 publication Critical patent/JP4724086B2/en
Expired - Fee Related legal-status Critical Current
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Claims (6)

筒状の軸受部材と、該軸受部材内に挿入されるロータ軸とを有し、そのロータ軸と前記軸受部材との間の軸受隙間に潤滑油が充填される構成の動圧軸受装置において、
前記軸受部材の軸方向一端が密閉されると共に他端が開口され、その開口側で該軸受部材と前記ロータ軸との間に前記軸受隙間に連通するテーパ状の注油口が形成され、
前記軸受部材の開口側の端面には、前記注油口を囲んで前記軸受隙間に充填すべき潤滑油を保持するための環状溝が形成され、当該環状溝は、その内周と前記注油口の外周とで稜角を形成するように前記注油口の外周に連続して形成されると共に、
前記環状溝は、その内周と外周との間が当該内周から外周に向けて漸次掘り下げられる傾斜面とされていることを特徴とする動圧軸受装置。 In the hydrodynamic bearing device having a cylindrical bearing member and a rotor shaft inserted into the bearing member, the bearing clearance between the rotor shaft and the bearing member is filled with lubricating oil.
One end in the axial direction of the bearing member is hermetically sealed and the other end is opened, and on the opening side, a tapered oil filler port communicating with the bearing gap is formed between the bearing member and the rotor shaft,
The end face of the opening side of the bearing member, the surround oil port annular groove for retaining the lubricating oil to be filled in the bearing gap is formed, the annular groove, the inner circumference and the oil port of its And continuously formed on the outer periphery of the oil inlet so as to form a ridge angle with the outer periphery of the
The hydrodynamic bearing device, wherein the annular groove has an inclined surface that is gradually dug from the inner periphery to the outer periphery between the inner periphery and the outer periphery. 筒状の軸受部材と、該軸受部材内に挿入されるロータ軸とを有し、そのロータ軸と前記軸受部材との間の軸受隙間に潤滑油が充填される構成の動圧軸受装置において、  In the hydrodynamic bearing device having a cylindrical bearing member and a rotor shaft inserted into the bearing member, the bearing clearance between the rotor shaft and the bearing member is filled with lubricating oil.
前記軸受部材の軸方向一端が密閉されると共に他端が開口され、その開口側で該軸受部材と前記ロータ軸との間に前記軸受隙間に連通するテーパ状の注油口が形成され、  One end in the axial direction of the bearing member is hermetically sealed and the other end is opened, and on the opening side, a tapered oil filler port communicating with the bearing gap is formed between the bearing member and the rotor shaft,
前記軸受部材の開口側の端面には、前記注油口を囲んで前記軸受隙間に充填すべき潤滑油を保持するための環状溝が形成され、当該環状溝の内周と前記注油口の外周との間の連続部分は前記環状溝および注油口に向かい凸型のアール形状となる曲面部として形成されると共に、  An annular groove is formed on an end surface of the bearing member on the opening side so as to surround the oil filling port and hold lubricating oil to be filled in the bearing gap. The continuous portion between is formed as a curved surface portion that is a convex round shape facing the annular groove and the oil inlet,
前記環状溝は、その内周と外周との間が当該内周から外周に向けて漸次掘り下げられる傾斜面とされていることを特徴とする動圧軸受装置。  The hydrodynamic bearing device, wherein the annular groove has an inclined surface that is gradually dug from the inner periphery to the outer periphery between the inner periphery and the outer periphery. 筒状の軸受部材と、該軸受部材内に挿入されるロータ軸とを有し、そのロータ軸と前記軸受部材との間の軸受隙間に潤滑油が充填される構成の動圧軸受装置において、  In the hydrodynamic bearing device having a cylindrical bearing member and a rotor shaft inserted into the bearing member, the bearing clearance between the rotor shaft and the bearing member is filled with lubricating oil.
前記軸受部材の軸方向一端が密閉されると共に他端が開口され、その開口側で該軸受部材と前記ロータ軸との間に前記軸受隙間に連通するテーパ状の注油口が形成され、  One end in the axial direction of the bearing member is hermetically sealed and the other end is opened, and on the opening side, a tapered oil filler port communicating with the bearing gap is formed between the bearing member and the rotor shaft,
前記軸受部材の開口側の端面には、前記注油口を囲んで前記軸受隙間に充填すべき潤滑油を保持するための環状溝が形成され、当該環状溝は、その内周と前記注油口の外周との間の平面部の幅が０．５ｍｍ以下となるように形成されると共に、An annular groove is formed on an end surface of the bearing member on the opening side so as to surround the oil filling port and hold lubricating oil to be filled in the bearing gap, and the annular groove has an inner periphery and an oil filling port. While formed so that the width of the plane portion between the outer periphery is 0.5 mm or less,
前記環状溝は、その内周と外周との間が当該内周から外周に向けて漸次掘り下げられる傾斜面とされていることを特徴とする動圧軸受装置。  The hydrodynamic bearing device, wherein the annular groove has an inclined surface that is gradually dug from the inner periphery to the outer periphery between the inner periphery and the outer periphery. 前記環状溝と前記注油口とは、協同して前記軸受隙間の加工精度を見込んだ最大許容容積の相当量の潤滑油保持できる容量であることを特徴とする請求項１から請求項３のいずれか１項に記載の動圧軸受装置。  The said annular groove and the said oil filler opening are the capacity | capacitances which can hold | maintain lubricating oil of the amount equivalent to the maximum permissible volume which considered the processing precision of the said bearing clearance in cooperation. The hydrodynamic bearing device according to claim 1. 前記環状溝の外周は、軸方向に対して略平行な壁面とされていることを特徴とする請求項１から請求項４のいずれか１項に記載の動圧軸受装置。 The hydrodynamic bearing device according to any one of claims 1 to 4, wherein an outer periphery of the annular groove is a wall surface substantially parallel to the axial direction. 前記環状溝を構成する傾斜面は、軸方向に対して４５〜８０度の角度を有することを特徴とする請求項１から請求項５のいずれか１項に記載の動圧軸受装置。 The hydrodynamic bearing device according to any one of claims 1 to 5, wherein the inclined surface constituting the annular groove has an angle of 45 to 80 degrees with respect to the axial direction.
JP2006271422A 2006-10-03 2006-10-03 Hydrodynamic bearing device Expired - Fee Related JP4724086B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006271422A JP4724086B2 (en) 2006-10-03 2006-10-03 Hydrodynamic bearing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006271422A JP4724086B2 (en) 2006-10-03 2006-10-03 Hydrodynamic bearing device

Publications (3)

Publication Number Publication Date
JP2008089097A JP2008089097A (en) 2008-04-17
JP2008089097A5 true JP2008089097A5 (en) 2009-11-12
JP4724086B2 JP4724086B2 (en) 2011-07-13

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Family Applications (1)

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JP2006271422A Expired - Fee Related JP4724086B2 (en) 2006-10-03 2006-10-03 Hydrodynamic bearing device

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120125735A (en) * 2011-05-09 2012-11-19 삼성전기주식회사 Hyperdynamic fluid bearing assembly and motor having the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4478297B2 (en) * 2000-06-20 2010-06-09 アルファナテクノロジー株式会社 Viscous fluid filling method of fluid bearing, motor
JP2002174243A (en) * 2000-12-11 2002-06-21 Matsushita Electric Ind Co Ltd Manufacturing method for dynamic pressure bearing device and dynamic pressure bearing device
JP2004144284A (en) * 2002-08-28 2004-05-20 Seiko Instruments Inc Fluid dynamic bearing device, motor, and recording medium driving device
JP2005180622A (en) * 2003-12-22 2005-07-07 Matsushita Electric Ind Co Ltd Fluid bearing device and lubricant filling method for the same
JP4788163B2 (en) * 2005-03-09 2011-10-05 日本電産株式会社 Fluid dynamic pressure bearing and spindle motor

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