CN103291739A - Bearing device - Google Patents
Bearing device Download PDFInfo
- Publication number
- CN103291739A CN103291739A CN2012100432951A CN201210043295A CN103291739A CN 103291739 A CN103291739 A CN 103291739A CN 2012100432951 A CN2012100432951 A CN 2012100432951A CN 201210043295 A CN201210043295 A CN 201210043295A CN 103291739 A CN103291739 A CN 103291739A
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- Prior art keywords
- bearing body
- bearing
- rotating shaft
- lubricating fluid
- bearing means
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Abstract
The invention discloses a bearing device, comprising a bearing body, wherein an axle hole for containing a rotating shaft is formed inside the bearing body; lubricating fluid is filled between the rotating shaft and the bearing body; the side of the bearing body sinks inwards to form an oil guide groove; the oil guide groove extends downwards from the middle part of the bearing body to the bottom end of the bearing body; a through hole communicated with the axle hole is formed inside the oil guide groove; the rotating shaft rotates and drives the lubricating fluid to ascend from the axle hole, so that dynamic pressure is built between the rotating shaft and the bearing body; a part of lubricating fluid between the rotating shaft and the bearing body passes through the through hole, flows to the bottom end of the bearing body under guiding of the oil guide groove, and then flows back to the bottom end of the axle hole to circulate.
Description
Technical field
The present invention relates to a kind of bearing means.
Background technique
At present, bearing is widely used in the various device, especially hydraulic bearing uses more generally in electronic equipment, 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 radiation fans, the bearing size of motor is little in these devices, to the rotating accuracy of bearing and the requirement height in life-span.
Hydraulic bearing is to form a layer fluid (can be gas or liquid) lubricant film in the micro-gap between rotating shaft and bearing, lubricant oil produces a dynamic pressure effect by the long-pending shearing action of different section of flowing through, make this hydraulic bearing support with high rigidity countershaft and lubricated, thereby make rotating shaft directly not contact with bearing, can reduce wear, reduce noise.In hydraulic bearing, the generation type of its carrying oil film has geometrical shape wedge effect, extrusion effect, surperficial flex effect, density wedge effect, viscosity wedge effect and bulking effect, and is at present main based on the geometrical shape wedge effect.
Yet how to protect oil and oiling and be still the problem that hydraulic bearing faces.The various effects that lubricant oil between rotating shaft and bearing causes in the dynamic pressure effect (as capillarity, pumping action) down tendency along axially revealing towards the end of bearing loss in atmosphere, thereby make this hydraulic bearing because of lubricant oil is not enough can't proper functioning, cause this hydraulic bearing to lose efficacy at last; Simultaneously, when the assembling rotating shaft, when rotating shaft is squeezed into this hydraulic bearing endoporus, can produce a huge reaction force when air is compressed in this endoporus, make oiling and assembling rotating shaft become difficult.Industry is usually by offering storage and the leakage problem that oil storage tank solves lubricant oil at the inner peripheral surface of hydraulic bearing, yet because the microminiaturized trend of bearing makes bearing bore diameter relatively dwindle, the hollow space of bearing is narrow and small relatively, therefore difficulty in the extreme when forming this oil storage tank is difficult to improve production and the stability of product.
Summary of the invention
In view of this, be necessary to provide a kind of bearing means with the oily effect of better guarantor.
A kind of bearing means, comprise a bearing body, be provided with one in this bearing body for the axis hole of accommodating a rotating shaft, be provided with lubricating fluid between this rotating shaft and the bearing body, inside recessed formation one oil guide slot in the side of this bearing body, described oil guide slot is extended downward the bottom of bearing body by the middle part of bearing body, be provided with a through hole that is communicated with axis hole in this oil guide slot, described rotating shaft rotation drive lubricating fluid is made by the axis hole rising sets up dynamic pressure between rotating shaft and the bearing body, part lubricating fluid between described rotating shaft and the bearing body sees through through hole and flows to the bottom of bearing body by the guiding of oil guide slot, is back to the bottom of axis hole again and reciprocation cycle.
Compared with prior art, the rotating shaft rotation drive lubricating fluid of this bearing means is made by the axis hole rising sets up dynamic pressure between rotating shaft and the bearing body, part lubricating fluid between described rotating shaft and the bearing body sees through through hole and flows to the bottom of bearing body by the guiding of oil guide slot, be back to the bottom of axis hole again and reciprocation cycle, thereby reach the effect that the purpose of setting up dynamic pressure between rotating shaft and the bearing body and lubricating fluid reflux, prevent that lubricating fluid from being splashed away by the top of bearing means.
Description of drawings
Fig. 1 is bearing means first embodiment's of the present invention three-dimensional assembly diagram.
Fig. 2 is the three-dimensional exploded view of bearing means shown in Figure 1.
Fig. 3 is the inversion figure of bearing means shown in Figure 2.
Longitudinal profile schematic representation when Fig. 4 specifically uses for bearing means of the present invention.
The longitudinal profile schematic representation of another angle when Fig. 5 specifically uses for bearing means of the present invention.
The longitudinal profile schematic representation of second embodiment when Fig. 6 specifically uses for bearing means of the present invention.
The primary component symbol description
| Bearing means | 100 |
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10 |
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20 |
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11 |
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12 |
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13 |
| Retaining |
14 |
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15 |
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16 |
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17 |
| Through |
18 |
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21 |
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23 |
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25 |
| The |
110 |
| The inclined- |
112 |
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210 |
| Assembling |
230 |
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30 |
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40 |
| First |
50 |
| Second |
60 |
Following embodiment will further specify the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
As shown in Figure 1, this bearing means 100 comprises a bearing body 10 and is located at a loam cake 20 on this bearing body 10.
Please consult Fig. 2 simultaneously, described bearing body 10 is cylindric, and it is formed by metallic dust ejection formations such as copper or iron.Formation one is through to the axis hole 17 of bottom surface in this bearing body 10 by its end face.Inside recessed formation one groove 11 of the end face of this bearing body 10.Described groove 11 comprises that the periphery that a plane 110 reaches by this plane 110 extends upward the inclined-plane 112 that forms.Described plane 110 is ring.Described inclined-plane 112 is ring-type, and is tilted to extend upward by the outer rim on described plane 110 and form.The bottom of this bearing body 10 is provided with an annular groove 12 around bearing body 10 bottoms.Described bearing body 10 forms a guiding face 13 in the top of annular groove 12.Described guiding face 13 is gradually-reducing shape from top to bottom and extends.Please consult Fig. 3 simultaneously, the relative both sides of the bottom surface periphery of this bearing body 10 downward extension respectively respectively form a retaining wall 14, and form an opening 15 respectively between the limit end of two retaining walls 14.The side of this bearing body 10 is in inside recessed formation one oil guide slot 16 of relative both sides difference near its bottom position.Each oil guide slot 16 correspondence is located at the top of opening 15, extends downward the bottom of running through this bearing body 10 by the middle part of bearing body 10, and is communicated with opening 15 respectively.This bearing body 10 forms a through hole 18 that is communicated with axis hole 17 in the oil guide slot 16 on right side.Described through hole 18 is circular, and it is located at the top of the oil guide slot 16 on right side.
This loam cake 20 comprises that a roof 21 reaches by the downward sidewall cylindraceous 23 that extends of the periphery of this roof 21.This roof 21 is circular tabular, and its middle part is provided with a perforation 210.This sidewall 23 is extended downward vertically by the periphery of roof 21 and forms, and its bottom forms an assembling face 230 corresponding with the inclined-plane 112 of bearing body 10.The described sidewall 23 of the outer cause of this assembling face 230 outwards is gradually-reducing shape and extends.During assembling, described loam cake 20 is assembled in advance by assembling face 230 on the inclined-plane 112 of bearing body 10, by sintering loam cake 20 and bearing body 10 is fixed together again.
Please consult Fig. 4 and Fig. 5 simultaneously, when specifically using, described bearing means 100 is arranged in the axle sleeve 30, and a rotating shaft 40 is arranged in the axis hole 17 of bearing means 100, and extends to the outside of loam cake 20 by the perforation 210 of described loam cake 20.Described axle sleeve 30 comprises that the periphery that a base plate 32 reaches by this base plate 32 extends upward a sleeve 34 cylindraceous that forms.The bottom of described bearing body 10 is resisted against on the base plate 32, and between the bottom surface of the inboard of described two retaining walls 14 and bearing body 10, be encircled into first oil storage space 50, between the outside of described two retaining walls 14 and annular groove 12 and sleeve 34, be encircled into second oil storage space 60.Be full of lubricating fluid between described first oil storage space 50, second oil storage space 60 and described bearing body 10 and the rotating shaft 40.Described loam cake 20 retainings are located at the top of sleeve 34.During use, the extruding lubricating fluid is rotated in described rotating shaft 40, thereby sets up dynamic pressure between bearing body 10 and rotating shaft 40, prevents directly contact between the two.In described rotating shaft 40 rotating process, lubricating fluids in described first oil storage space 50 rise in the gap between rotating shaft 40 and the bearing body 10, the lubrication flow of the part between this rotating shaft 40 and the bearing body 10 is known from experience and is seen through through hole 18 and the guiding by oil guide slot 16 flows in second oil storage space 60, be back in first oil storage space 50 by opening 15 again, thereby reach the effect that the purpose of setting up dynamic pressure between rotating shaft 40 and the bearing body 10 and lubricating fluid reflux, prevent that lubricating fluid from being splashed away by the top of bearing means 100.Guiding face 13 retainings of described bearing body 10 bottoms are located at the top of second oil storage space 60, can prevent that the lubricating fluid in second oil storage space 60 from overflowing to the gap of bearing body 10 and sleeve 34, and described guiding face 13 gradually-reducing shape design from top to bottom, lubricating fluid that can directed stream to the second oil storage space 60 tops flows downward, thereby accelerates the circulation of lubricating fluids in first oil storage space 50 and second oil storage space 60.Described loam cake 20 can prevent that the lubricating fluid that rises to bearing body 10 tops from splashing to the outside of bearing means 100, thereby plays the effect of protecting oil.
The sectional drawing of second embodiment when Fig. 6 specifically uses for bearing means of the present invention.Present embodiment and last embodiment's difference is: described loam cake 20 extends to form a guide portion 25 downwards in the inner circumference edge of perforation 210.Described guide portion 25 can be separately by behind the metallic dust ejection formation, and the mode by sintering is connected with loam cake 20 again.Described guide portion 25 can be guided the lubricating fluid that rises to bearing body 10 tops downwards, thereby the lubricating fluid that further prevents from rising to bearing body 10 tops is splashed to the outside of bearing means 100 by the perforation 210 of loam cake 20.
During concrete enforcement, the number of described oil guide slot 16 is not limited to the situation of above-described embodiment, and it can be two and also can be one or morely, and described through hole 18 numbers also are not limited to the situation of above-described embodiment, it can only be located in the oil guide slot 16, also can be respectively equipped with through hole 18 in each oil guide slot 16.
Be understandable that, for the person of ordinary skill of the art, can make change and the distortion that other various pictures are answered by technical conceive according to the present invention, and all these change the protection domain that all should belong to claim of the present invention with distortion.
Claims (10)
1. bearing means, comprise a bearing body, be provided with one in this bearing body for the axis hole of accommodating a rotating shaft, be provided with lubricating fluid between this rotating shaft and the bearing body, it is characterized in that: inside recessed formation one oil guide slot in the side of this bearing body, described oil guide slot is extended downward the bottom of bearing body by the middle part of bearing body, be provided with a through hole that is communicated with axis hole in this oil guide slot, described rotating shaft rotation drive lubricating fluid is made by the axis hole rising sets up dynamic pressure between rotating shaft and the bearing body, part lubricating fluid between described rotating shaft and the bearing body sees through through hole and flows to the bottom of bearing body by the guiding of oil guide slot, is back to the bottom of axis hole again and reciprocation cycle.
2. bearing means as claimed in claim 1 is characterized in that: also comprise a loam cake of being located on this bearing body, described loam cake will flow to the lubricating fluid retaining on bearing body top and establish in it.
3. bearing means as claimed in claim 2, it is characterized in that: the periphery of this bearing body extends upward and forms an inclined-plane, described loam cake comprises that roof reaches by the downward sidewall cylindraceous that extends of the periphery of this roof, this roof is provided with one and supplies commentaries on classics to take out the perforation that wears, the bottom of this sidewall forms an assembling face corresponding with the inclined-plane of bearing body, described loam cake is assembled in advance by assembling face on the inclined-plane of bearing body, by sintering loam cake and bearing body is fixed together again.
4. bearing means as claimed in claim 3 is characterized in that: described roof extends to form a guide portion downwards in the inner edge of perforation, and described guide portion will flow to the lubricating fluid guiding downwards on bearing body top and flow in the axis hole.
5. bearing means as claimed in claim 1 is characterized in that: the position of corresponding oil guide slot below, the bottom of described bearing body is provided with opening, and lubricating fluid is by described open closed bottom to axis hole.
6. bearing means as claimed in claim 5, it is characterized in that: this bearing means is used for being located in the axle sleeve, the relative both sides of the bottom surface of described bearing body downward extension respectively respectively form a retaining wall, described opening is formed between the end of two retaining walls, the diapire of described two retaining walls and axle sleeve is encircled into first oil storage space, in described rotating shaft rotation process, the lubricating fluid in described first oil storage space upwards flows along axis hole.
7. bearing means as claimed in claim 6, it is characterized in that: form second oil storage space between the sidewall of described two retaining walls and axle sleeve, part lubricating fluid between described rotating shaft and the bearing body sees through through hole and the guiding by oil guide slot flows to second oil storage space, again by open closed to first oil storage space and reciprocation cycle.
8. bearing means as claimed in claim 7, it is characterized in that: the bottom of described bearing body forms an annular groove, and described second oil storage space extends to the annular groove place, and the top of described annular groove forms one and is gradually-reducing shape from top to bottom and extends guiding face.
9. bearing means as claimed in claim 1, it is characterized in that: described bearing body is formed by the metallic dust ejection formation.
10. bearing means as claimed in claim 4 is characterized in that: cover on sintering was fixed to again after described guide portion formed by the metallic dust ejection formation.
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 true CN103291739A (en) | 2013-09-11 |
| CN103291739B 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) |
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 |
|---|---|
| CN103291739B (en) | 2016-12-14 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161214 Termination date: 20180224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |