JP4642682B2 - 動圧軸受装置及びその製造方法 - Google Patents
動圧軸受装置及びその製造方法 Download PDFInfo
- Publication number
- JP4642682B2 JP4642682B2 JP2006077300A JP2006077300A JP4642682B2 JP 4642682 B2 JP4642682 B2 JP 4642682B2 JP 2006077300 A JP2006077300 A JP 2006077300A JP 2006077300 A JP2006077300 A JP 2006077300A JP 4642682 B2 JP4642682 B2 JP 4642682B2
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- JP
- Japan
- Prior art keywords
- bearing
- peripheral surface
- bearing member
- radial
- inner peripheral
- 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 - Fee Related
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
- F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
- F16C17/107—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure with at least one surface for radial load and at least one surface for axial load
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- 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
- F16C2220/00—Shaping
- F16C2220/02—Shaping by casting
- F16C2220/04—Shaping by casting by injection-moulding
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Description
転時、動圧溝2c1による潤滑油の引き込み力(ポンピング力)は上側領域が下側領域に比べて相対的に大きくなる。そして、この引き込み力の差圧によって、スリーブ部8の内周面8aと軸部材2aの外周面2a1との間に満たされた潤滑油が下方に流動し、第一スラスト軸受部T1のスラスト軸受隙間→蓋部材10の半径方向溝10c→貫通孔12→シール部11の半径方向溝11b1、という経路を循環して、第一ラジアル軸受部R1のラジアル軸受隙間に再び引き込まれる。このように、軸受内部の潤滑油を流動循環させることで、上記のような潤滑油の負圧発生を防止する効果をより高めることができる。
2 軸部材
7 軸受部材
8 スリーブ部
8a 内周面
9 ハウジング部
11 シール部
12 貫通孔
12a 第一流路
12b 第二流路
12c 第三流路
12d テーパ部
13 矯正ピン
R1、R2 ラジアル軸受部
T1、T2 スラスト軸受部
S1 シール空間
Claims (3)
- 樹脂材料で形成された軸受部材と、軸受部材の内周に挿入される軸部材と、軸部材の外周面と軸受部材の内周面との間のラジアル軸受隙間に生じる潤滑流体の動圧作用で軸部材を相対回転自在に支持するラジアル軸受部とを備えた動圧軸受装置において、
軸受部材に軸方向の貫通孔が成形ピンで型成形され、かつ軸受部材の内周面の円筒度が5μm以内であり、貫通孔の断面積を軸方向で異ならせたことを特徴とする動圧軸受装置。 - 軸受部材の内周面が、その昇温下で矯正されている請求項1記載の動圧軸受装置。
- 樹脂材料で形成された軸受部材と、軸受部材の内周に挿入される軸部材と、軸部材の外周面と軸受部材の内周面との間のラジアル軸受隙間に生じる潤滑流体の動圧作用で軸部材を相対回転自在に支持するラジアル軸受部とを備え、軸受部材に軸方向の貫通孔が形成されている動圧軸受装置を製造するための方法であって、
軸受部材を樹脂材料で射出成形する際に、断面積を軸方向で異ならせた貫通孔を成形ピンで成形し、軸受部材の内周面を、その昇温下で矯正ピンにより矯正することを特徴とする動圧軸受装置の製造方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006077300A JP4642682B2 (ja) | 2006-03-20 | 2006-03-20 | 動圧軸受装置及びその製造方法 |
Applications Claiming Priority (1)
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JP2006077300A JP4642682B2 (ja) | 2006-03-20 | 2006-03-20 | 動圧軸受装置及びその製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007255450A JP2007255450A (ja) | 2007-10-04 |
JP4642682B2 true JP4642682B2 (ja) | 2011-03-02 |
Family
ID=38629903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006077300A Expired - Fee Related JP4642682B2 (ja) | 2006-03-20 | 2006-03-20 | 動圧軸受装置及びその製造方法 |
Country Status (1)
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JP (1) | JP4642682B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5143400B2 (ja) | 2006-11-27 | 2013-02-13 | Ntn株式会社 | 動圧軸受装置および軸受部材の射出成形金型 |
JP2011021649A (ja) * | 2009-07-14 | 2011-02-03 | Ntn Corp | 流体軸受装置 |
JP5777876B2 (ja) * | 2010-12-08 | 2015-09-09 | ミネベア株式会社 | ブラシレスモータおよびディスク駆動装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004308698A (ja) * | 2003-04-02 | 2004-11-04 | Sankyo Seiki Mfg Co Ltd | 軸受装置及びその製造方法、並びに軸受装置を備えたモータ及びその製造方法 |
JP2006038179A (ja) * | 2004-07-29 | 2006-02-09 | Matsushita Electric Ind Co Ltd | 流体軸受装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09222118A (ja) * | 1996-02-16 | 1997-08-26 | Nippon Seiko Kk | 軸受装置 |
JPH11170397A (ja) * | 1997-08-11 | 1999-06-29 | Ntn Corp | 高速・高面圧滑り部用スラストワッシャ |
JPH11311242A (ja) * | 1998-04-28 | 1999-11-09 | Namiki Precision Jewel Co Ltd | 動圧軸受の製造方法 |
-
2006
- 2006-03-20 JP JP2006077300A patent/JP4642682B2/ja not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004308698A (ja) * | 2003-04-02 | 2004-11-04 | Sankyo Seiki Mfg Co Ltd | 軸受装置及びその製造方法、並びに軸受装置を備えたモータ及びその製造方法 |
JP2006038179A (ja) * | 2004-07-29 | 2006-02-09 | Matsushita Electric Ind Co Ltd | 流体軸受装置 |
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JP2007255450A (ja) | 2007-10-04 |
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