CN103291739B - Bearing arrangement - Google Patents
Bearing arrangement Download PDFInfo
- Publication number
- CN103291739B CN103291739B CN201210043295.1A CN201210043295A CN103291739B CN 103291739 B CN103291739 B CN 103291739B CN 201210043295 A CN201210043295 A CN 201210043295A CN 103291739 B CN103291739 B CN 103291739B
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- CN
- China
- Prior art keywords
- bearing body
- bearing
- rotating shaft
- guide groove
- axis hole
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Abstract
A kind of bearing arrangement, including a bearing body, one it is provided with for housing the axis hole of a rotating shaft in this bearing body, it is provided with lubricating fluid between this rotating shaft and bearing body, the side of this bearing body is inwardly recessed formation one oil guide groove, described oil guide groove is extended downward the bottom of bearing body by the middle part of bearing body, a through hole connected with axis hole it is provided with in this oil guide groove, described rotating shaft rotarily drives lubricating fluid and is risen by axis hole and make to set up between rotating shaft and bearing body dynamic pressure, partial lubrication fluid between described rotating shaft and bearing body is passed through through hole and is flowed to the bottom of bearing body by the guiding of oil guide groove, it is back to the bottom of axis hole again and reciprocation cycle.
Description
Technical field
The present invention relates to a kind of bearing arrangement.
Background technology
At present, bearing is widely used in various equipment, especially hydrodynamic bearing uses more universal in an electronic, such as fields such as hard disk drive (HDD), CD drive (CD-ROM), Digital video disc machine (DVD), mini disc machine (MiniDisc), CD-Magnetic Optical (MO) and radiator fans, in these devices, the bearing size of motor is little, and rotating accuracy and the requirement in life-span to bearing are high.
Hydrodynamic bearing is to form a layer fluid (can be gas or liquid) lubricating oil film in the minim gap between rotating shaft and bearing, lubricating oil produces a dynamic pressure effect by flowing through the long-pending shearing action of different section, this hydrodynamic bearing is made to support with high rigidity countershaft and lubricate, so that rotating shaft is not directly contacted with bearing, abrasion can be reduced, reduce noise.In hydrodynamic bearing, the generation type of its carrying oil film has geometry wedge effect, extrusion effect, surface flex effect, density wedge effect, viscosity wedge effect and bulking effect, the most main based on geometry wedge effect.
But how to protect oil and be still hydrodynamic bearing problem encountered with oiling.Be inclined under the various effects (such as capillarity, pumping action) that lubricating oil between rotating shaft and bearing causes in dynamic pressure effect axially towards bearing end reveal and loss in air, so that this hydrodynamic bearing cannot normally work because lubricating oil is not enough, finally result in this hydrodynamic bearing and lost efficacy；Meanwhile, when assembling rotating shaft, when rotating shaft is squeezed into this hydrodynamic bearing endoporus, a huge counteracting force when air is compressed in this endoporus, can be produced so that oiling and assembling rotating shaft become difficulty.Industry generally solves storage and the leakage problem of lubricating oil by offering oil storage tank on the inner peripheral surface of hydrodynamic bearing, miniaturization trend yet with bearing makes bearing bore diameter relatively reduce, the hollow space of bearing is the narrowest and small, therefore the most difficult when forming this oil storage tank, it is difficult to improve production and the stability of product.
Summary of the invention
In view of this, it is necessary to a kind of bearing arrangement having and preferably protecting oil effect is provided.
A kind of bearing arrangement, including a bearing body, one it is provided with for housing the axis hole of a rotating shaft in this bearing body, it is provided with lubricating fluid between this rotating shaft and bearing body, the side of this bearing body is inwardly recessed formation one oil guide groove, described oil guide groove is extended downward the bottom of bearing body by the middle part of bearing body, a through hole connected with axis hole it is provided with in this oil guide groove, described rotating shaft rotarily drives lubricating fluid and is risen by axis hole and make to set up between rotating shaft and bearing body dynamic pressure, partial lubrication fluid between described rotating shaft and bearing body is passed through through hole and is flowed to the bottom of bearing body by the guiding of oil guide groove, it is back to the bottom of axis hole again and reciprocation cycle.
Compared with prior art, the rotating shaft of this bearing arrangement rotarily drives lubricating fluid and is risen by axis hole and make to set up between rotating shaft and bearing body dynamic pressure, partial lubrication fluid between described rotating shaft and bearing body is passed through through hole and is flowed to the bottom of bearing body by the guiding of oil guide groove, it is back to the bottom of axis hole again and reciprocation cycle, thus reach the purpose setting up dynamic pressure between rotating shaft and bearing body and the effect of lubricating fluid backflow, prevent lubricating fluid from being splashed away by the top of bearing arrangement.
Accompanying drawing explanation
Fig. 1 is the three-dimensional assembly diagram of bearing arrangement first embodiment of the present invention.
Fig. 2 is the three-dimensional exploded view of the bearing arrangement shown in Fig. 1.
Fig. 3 is the inversion figure of the bearing arrangement shown in Fig. 2.
Fig. 4 is the bearing arrangement of the present invention longitudinal profile schematic diagram when specifically applying.
Fig. 5 is the longitudinal profile schematic diagram of the bearing arrangement of the present invention another angle when specifically applying.
Fig. 6 is the longitudinal profile schematic diagram of the bearing arrangement of the present invention second embodiment when specifically applying.
Main element symbol description
| Bearing arrangement | 100 |
| Bearing body | 10 |
| Upper cover | 20 |
| Groove | 11 |
| Annular groove | 12 |
| Guiding face | 13 |
| Retaining wall | 14 |
| Opening | 15 |
| Oil guide groove | 16 |
| Axis hole | 17 |
| Through hole | 18 |
| Roof | 21 |
| Sidewall | 23 |
| Guidance part | 25 |
| Plane | 110 |
| Inclined-plane | 112 |
| Perforation | 210 |
| Assem-bly face | 230 |
| Axle sleeve | 30 |
| Rotating shaft | 40 |
| First oil storage space | 50 |
| Second oil storage space | 60 |
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
As it is shown in figure 1, this bearing arrangement 100 includes a bearing body 10 and the upper cover 20 being located on this bearing body 10.
Please refer to Fig. 2, described bearing body 10 is cylindric, and it is formed by the metal dust ejection formation such as copper or ferrum.An axis hole 17 being through to bottom surface by its end face is formed in this bearing body 10.The end face of this bearing body 10 is inwardly recessed formation one groove 11.Described groove 11 includes that a plane 110 and the periphery by this plane 110 upwardly extend the inclined-plane 112 formed.Described plane 110 is annular.Described inclined-plane 112 is ring-type, and is tilted upward extension by the outer rim of described plane 110 and form.The bottom of this bearing body 10 is provided with one around the annular groove 12 of bearing body 10 bottom.Described bearing body 10 forms a guiding face 13 in the top of annular groove 12.Described guiding face 13 extends in gradually-reducing shape from top to bottom.Please refer to Fig. 3, the opposite sides of the bottom surface periphery of this bearing body 10 extends each formation one retaining wall 14 separately down, and forms an opening 15 between the limit end of two retaining walls 14 respectively.The side of this bearing body 10 is concavely formed an oil guide groove 16 respectively inwards in the opposite sides near its bottom position.Each oil guide groove 16 is correspondingly arranged at the top of opening 15, the middle part of bearing body 10 extend downward the bottom running through this bearing body 10, and connect with opening 15 respectively.This bearing body 10 forms a through hole 18 connected with axis hole 17 in the oil guide groove 16 on right side.Described through hole 18 is circular, and it is located at the top of oil guide groove 16 on right side.
This upper cover 20 includes the cylindric sidewall 23 that a roof 21 and the periphery by this roof 21 downwardly extend.This roof 21 is circular plate-like shape, is provided with a perforation 210 in the middle part of it.This sidewall 23 is extended downward vertically by the periphery of roof 21 and forms, and its bottom forms one and corresponding with the inclined-plane 112 of bearing body 10 assem-bly faces 230.This assem-bly faces sidewall 23 described in the outer cause of 230 and outwards extends in gradually-reducing shape.During assembling, described upper cover 20 is pre-assembled to the inclined-plane 112 of bearing body 10 by assem-bly facing 230, then is fixed together with bearing body 10 by upper cover 20 by sintering.
Please refer to Fig. 4 and Fig. 5, when specifically applying, described bearing arrangement 100 is arranged in an axle sleeve 30, and a rotating shaft 40 is arranged in the axis hole 17 of bearing arrangement 100, and is extended to the outside of upper cover 20 by the perforation 210 of described upper cover 20.Described axle sleeve 30 includes that a base plate 32 and the periphery by this base plate 32 upwardly extend the sleeve 34 of the cylindrical shape formed.The bottom of described bearing body 10 is resisted against on base plate 32, and it is encircled into the first oil storage space 50 between inner side and the bottom surface of bearing body 10 of described two retaining walls 14, between described two retaining walls 14 and the outside of annular groove 12 and sleeve 34, it is encircled into the second oil storage space 60.Lubricating fluid it is full of between described first oil storage space the 50, second oil storage space 60 and described bearing body 10 and rotating shaft 40.Described upper cover 20 gear is located at the top of sleeve 34.During use, described rotating shaft 40 rotates extruding lubricating fluid, thus sets up dynamic pressure between bearing body 10 and rotating shaft 40, prevents from the most directly contacting.During described rotating shaft 40 rotates, lubricating fluid in described first oil storage space 50 rises in the gap between rotating shaft 40 and bearing body 10, the lubrication flow cognition of the part between this rotating shaft 40 and bearing body 10 flows in the second oil storage space 60 through through hole 18 guiding by oil guide groove 16, it is back in the first oil storage space 50 by opening 15 again, thus reach the purpose setting up dynamic pressure between rotating shaft 40 and bearing body 10 and the effect of lubricating fluid backflow, prevent lubricating fluid from being splashed away by the top of bearing arrangement 100.Guiding face 13 gear of described bearing body 10 bottom is located at the top of the second oil storage space 60, the lubricating fluid being possible to prevent in the second oil storage space 60 overflows to the gap of bearing body 10 and sleeve 34, and the gradually-reducing shape design that described guiding face 13 is from top to bottom, can guide and flow to the lubricating fluid on the second oil storage space 60 top and flow downward, thus the circulation of lubricating fluid in accelerating the first oil storage space 50 and the second oil storage space 60.Described upper cover 20 can prevent the lubricating fluid rising to bearing body 10 top from splashing to the outside of bearing arrangement 100, thus plays the effect protecting oil.
Fig. 6 is the profile of the bearing arrangement of the present invention second embodiment when specifically applying.The present embodiment is with the difference of previous embodiment: described upper cover 20 is downwardly extending a guidance part 25 in the inner peripheral of perforation 210.After described guidance part 25 can be separately through metal dust ejection formation, then it is connected with upper cover 20 by the way of sintering.The lubricating fluid rising to bearing body 10 top can be guided downwards by described guidance part 25, thus prevents the lubricating fluid rising to bearing body 10 top from being splashed to the outside of bearing arrangement 100 by the perforation 210 of upper cover 20 further.
When being embodied as, the number of described oil guide groove 16 is not limited to the situation of above-described embodiment, its can be two the most one or more, described through hole 18 number is also not necessarily limited to the situation of above-described embodiment, it can be only located in an oil guide groove 16, it is possible to is respectively equipped with through hole 18 in each oil guide groove 16.
It is understood that for the person of ordinary skill of the art, can conceive according to the technology of the present invention and make change and the deformation that other various pictures are answered, and all these change all should belong to the protection domain of the claims in the present invention with deformation.
Claims (10)
1. a bearing arrangement, including a bearing body, is provided with one for housing one turn in this bearing body
The axis hole of axle, is provided with lubricating fluid between this rotating shaft and bearing body, it is characterised in that: this bearing body
Side be inwardly recessed formation one oil guide groove, described oil guide groove is extended downward axle by the middle part of bearing body
Holding the bottom of body, be provided with a through hole connected with axis hole in this oil guide groove, described rotating shaft rotarily drives profit
Slip-stream body is risen by axis hole and makes to set up between rotating shaft and bearing body dynamic pressure, described rotating shaft and bearing body
Between partial lubrication fluid through through hole and flowed to the bottom of bearing body by the guiding of oil guide groove, then
It is back to the bottom of axis hole and reciprocation cycle.
2. bearing arrangement as claimed in claim 1, it is characterised in that: also include being located at this bearing body
On a upper cover, the lubricating fluid flowing to bearing body top is blocked in bearing body by described upper cover.
3. bearing arrangement as claimed in claim 2, it is characterised in that: the periphery of this bearing body is upwards
Extend and form an inclined-plane, described upper cover include roof and by the periphery of this roof downwardly extend cylindric
Sidewall, this roof is provided with a perforation worn for rotating shaft, the bottom formation one of this sidewall and bearing body
Corresponding the assem-bly facing in inclined-plane, described upper cover is pre-assembled to the inclined-plane of bearing body by assem-bly facing, then
By sintering, upper cover is fixed together with bearing body.
4. bearing arrangement as claimed in claim 3, it is characterised in that: described roof is in the inner edge of perforation
Being downwardly extending a guidance part, the lubricating fluid flowing to bearing body top is led downwards by described guidance part
Draw and flow in axis hole.
5. bearing arrangement as claimed in claim 1, it is characterised in that: the bottom pair of described bearing body
Answering the position below oil guide groove to be provided with opening, lubricating fluid is by the described open closed bottom to axis hole.
6. bearing arrangement as claimed in claim 5, it is characterised in that: this bearing arrangement is located at an axle sleeve
In, the opposite sides of the bottom surface of described bearing body extends each formation one retaining wall, described opening separately down
Being formed between the end of two retaining walls, described two retaining walls are encircled into the first oil storage space with the diapire of axle sleeve,
During described axis of rotation, the lubricating fluid in described first oil storage space flows up along axis hole.
7. bearing arrangement as claimed in claim 6, it is characterised in that: described two retaining walls and the side of axle sleeve
Forming the second oil storage space between wall, the partial lubrication fluid between described rotating shaft and bearing body is through logical
Hole also flows to the second oil storage space by the guiding of oil guide groove, then by open closed to the first oil storage space
Reciprocation cycle.
8. bearing arrangement as claimed in claim 7, it is characterised in that: the bottom shape of described bearing body
Becoming an annular groove, described second oil storage space extends at annular groove, the top of described annular groove formed one by to
Under in gradually-reducing shape extend guiding face.
9. bearing arrangement as claimed in claim 1, it is characterised in that: described bearing body is by metal powder
End ejection formation forms.
10. bearing arrangement as claimed in claim 4, it is characterised in that: described guidance part passes through metal powder
End ejection formation re-sinters after forming and is fixed to cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210043295.1A CN103291739B (en) | 2012-02-24 | 2012-02-24 | Bearing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210043295.1A CN103291739B (en) | 2012-02-24 | 2012-02-24 | Bearing arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103291739A CN103291739A (en) | 2013-09-11 |
| CN103291739B true CN103291739B (en) | 2016-12-14 |
Family
ID=49093122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210043295.1A Expired - Fee Related CN103291739B (en) | 2012-02-24 | 2012-02-24 | Bearing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103291739B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217542A (en) * | 2021-05-08 | 2021-08-06 | 珠海格力电器股份有限公司 | Oil-retaining bearing, motor end cover assembly, motor and electric appliance |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007064360A (en) * | 2005-08-31 | 2007-03-15 | Matsushita Electric Ind Co Ltd | Fluid bearing device and spindle motor using the same |
| JP2007211960A (en) * | 2006-02-13 | 2007-08-23 | Hitachi Powdered Metals Co Ltd | Bearing unit and its manufacturing method |
| JP2008008312A (en) * | 2006-06-27 | 2008-01-17 | Matsushita Electric Ind Co Ltd | Fluid bearing device, motor, and recording and reproducing device |
| CN101280805A (en) * | 2007-04-06 | 2008-10-08 | 富准精密工业(深圳)有限公司 | Rolling body |
| CN101358621A (en) * | 2007-07-30 | 2009-02-04 | 日本电产株式会社 | Fluid dynamic bearing device, spindle motor and disk drive apparatus |
| JP4435848B1 (en) * | 2009-01-15 | 2010-03-24 | シーアールディ株式会社 | Shaft fixed type fluid dynamic pressure bearing device, spindle motor and recording disk device having the same |
| CN101922512A (en) * | 2009-06-12 | 2010-12-22 | 日本电产株式会社 | Bearing means, spindle motor and disk drive device |
-
2012
- 2012-02-24 CN CN201210043295.1A patent/CN103291739B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007064360A (en) * | 2005-08-31 | 2007-03-15 | Matsushita Electric Ind Co Ltd | Fluid bearing device and spindle motor using the same |
| JP2007211960A (en) * | 2006-02-13 | 2007-08-23 | Hitachi Powdered Metals Co Ltd | Bearing unit and its manufacturing method |
| JP2008008312A (en) * | 2006-06-27 | 2008-01-17 | Matsushita Electric Ind Co Ltd | Fluid bearing device, motor, and recording and reproducing device |
| CN101280805A (en) * | 2007-04-06 | 2008-10-08 | 富准精密工业(深圳)有限公司 | Rolling body |
| CN101358621A (en) * | 2007-07-30 | 2009-02-04 | 日本电产株式会社 | Fluid dynamic bearing device, spindle motor and disk drive apparatus |
| JP4435848B1 (en) * | 2009-01-15 | 2010-03-24 | シーアールディ株式会社 | Shaft fixed type fluid dynamic pressure bearing device, spindle motor and recording disk device having the same |
| CN101922512A (en) * | 2009-06-12 | 2010-12-22 | 日本电产株式会社 | Bearing means, spindle motor and disk drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103291739A (en) | 2013-09-11 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161214 Termination date: 20180224 |