CN103322034B - Bearing and its manufacture method and the bearing arrangement using this kind of bearing - Google Patents
Bearing and its manufacture method and the bearing arrangement using this kind of bearing Download PDFInfo
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- CN103322034B CN103322034B CN201210078978.0A CN201210078978A CN103322034B CN 103322034 B CN103322034 B CN 103322034B CN 201210078978 A CN201210078978 A CN 201210078978A CN 103322034 B CN103322034 B CN 103322034B
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- Prior art keywords
- bearing
- bearing body
- upper lid
- oil guide
- axis hole
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Abstract
The present invention provides a kind of bearing, including bearing body and upper lid, the bearing is provided with axis hole, the axis hole runs through bearing body and upper lid, the bearing forms Oil Guide passage in ejection formation by metal dust and the mixture ejection formation of bond vitrified agent between the bearing body and upper lid, and the Oil Guide passage penetrates the axis hole of the bearing and Bearing outer, the bearing life is grown, low manufacture cost.The present invention also provides a kind of preparation method of bearing and the bearing arrangement using this kind of bearing.
Description
Technical field
The present invention relates to a kind of bearing, further relates to a kind of manufacture method of bearing and the bearing arrangement using this kind of bearing.
Background technology
At present, bearing is widely used in various equipment, and especially hydrodynamic bearing uses more general in an electronic
Time, such as hard disk drive (HDD), CD drive (CD-ROM), Digital video disc machine (DVD), mini disc machine
(MiniDisc), the field such as CD-Magnetic Optical (MO) and radiator fan, the bearing size of motor is small in these devices, and bearing is returned
Turn precision and the requirement in life-span is high.
Hydrodynamic bearing is that a layer fluid (can be gas or liquid) profit is formed in the minim gap between rotating shaft and bearing
Lubricating oil film, lubricating oil produce a dynamic pressure effect by flowing through the shearing action of different section product so that the hydrodynamic bearing is with height
Rigid countershaft is supported and lubricated, so that rotating shaft is not directly contacted with bearing, can be reduced abrasion, be reduced noise.
In hydrodynamic bearing, its generation type for carrying oil film has geometry wedge effect, extrusion effect, surface flex effect, density wedge
Effect and bulking effect.
Existing hydrodynamic bearing generally includes ball bearing, fluid bearing and oiliness bearing.Wherein, ball bearing and hydraulic pressure
Bearing is higher without by the first choice as batch production bearing because of complicated, cost of manufacture.And although oiliness bearing structure is simple
List, cost are low, but the mode of its generally use pressing mold is formed, and the bearing after shaping is had larger structure hole, to profit
The flowing of slip-stream body within the bearing has inhibition, therefore such a bearing not only makes rotational efficienty not high in use,
And easily wear, cause the service life of bearing to reduce.
The content of the invention
In view of this, it is necessary to a kind of bearing to increase the service life and its manufacture method are provided and use this kind of axle
The bearing arrangement held.
A kind of bearing, including bearing body and upper lid, the bearing are provided with axis hole, and the axis hole is through bearing body and upper
Lid, the bearing by metal dust and bond vitrified agent mixture ejection formation, and in ejection formation in the bearing body and
Oil Guide passage is formed between upper lid, the Oil Guide passage penetrates the axis hole of the bearing and Bearing outer.
A kind of bearing arrangement, including rotating shaft, in addition to bearing, the bearing include bearing body and upper lid, set on the bearing
There is axis hole, the axis hole runs through bearing body and upper lid, and the bearing is by material ejection formation, and in ejection formation in the bearing sheet
Oil Guide passage is formed between body and upper lid, the Oil Guide passage penetrates the axis hole of the bearing and Bearing outer, and the rotating shaft is rotationally
It is installed in the axis hole of the bearing, lubricating fluid is filled between the rotating shaft and bearing.
A kind of manufacture method of bearing, comprises the following steps：
Bearing die is provided；
With material injection molding method by the mixture of metal dust and bond vitrified agent inject in the bearing die with
Bearing is formed, the bearing includes a Shang Gai and a bearing body, and is formed in ejection formation between the bearing body and upper lid
Oil Guide passage.
The bearing of the present invention makes bearing body and upper lid using metal dust injection molding method, and this kind of mode can be effective
Cost of manufacture is reduced, and due to using ejection formation after metal powders melt, making the material for the bearing arrangement to be formed with smaller
Material gap, reduce the structure hole of bearing surface, so as to reduce the friction between lubricating fluid and bearing, extend bearing
Service life.
Brief description of the drawings
Fig. 1 is the three-dimensional assembly diagram for the bearing that embodiment of the present invention provides.
Fig. 2 is the three-dimensional exploded view of the bearing shown in Fig. 1.
Fig. 3 is the inversion figure of the bearing shown in Fig. 2.
Fig. 4 is diagrammatic cross-sections of the Fig. 1 along IV-IV.
Fig. 5 is diagrammatic cross-sections of the Fig. 1 along V-V.
Fig. 6 is the manufacturing flow chart for the bearing that embodiment of the present invention provides.
Main element symbol description
| Bearing | 100 |
| Bearing body | 10 |
| Contact surface | 11 |
| Bottom surface | 12 |
| Side | 13 |
| Flat part | 131 |
| Lower shaft hole | 14 |
| Oil guide groove | 15 |
| First projection | 16 |
| Upper surface | 161 |
| Snap-latch surface | 162 |
| Outside wall surface | 163 |
| Second projection | 17 |
| Upper lid | 20 |
| Upper capping | 21 |
| Upper shaft hole | 211 |
| Lower capping | 22 |
| Side cover face | 23 |
| Opening | 231 |
| Oil Guide passage | 24 |
| Axle sleeve | 30 |
| Bottom plate | 32 |
| Sleeve | 34 |
| Rotating shaft | 40 |
| First oil storage space | 50 |
| Second oil storage space | 60 |
Following embodiment will combine above-mentioned accompanying drawing and further illustrate the present invention.
Embodiment
Fig. 1 and Fig. 4 are referred to, the bearing arrangement includes bearing 100, rotating shaft 40 and axle sleeve 30.The rotating shaft 40 is rotationally
It is installed in the axis hole of the bearing 100, the bearing 100 is sheathed in the axle sleeve 30.The rotating shaft 40, axle sleeve 30 and bearing 100 it
Between be filled with lubricating fluid.
For the bearing 100 by material ejection formation (Material Injection Molding, MIM), it includes an axle
Hold body 10 and on the bearing body 10 one on lid 20.
Please refer to Fig. 2 and Fig. 3, the bearing body 10 is substantially in the form of annular discs, and it includes the contact surface located at top surface
11st, the bottom surface 12 relative with contact surface 11 and it is connected the side 13 of contact surface 11 and bottom surface 12.The contact surface 11 is used for and upper lid
20 contact connections.Two flat parts 131 are formed on the side 13, two flat part 131 is parallel relative, and vertically prolongs from contact surface 11
Extend bottom surface 12.Two flat part 131 can be formed by the way of cutting, make bearing body 10 where flat part 131
The radial dimension of plane is less than the place diameter of a circle of bearing body 10.Lower shaft hole 14 and Oil Guide are also formed with the bearing body 10
Groove 15.The lower shaft hole 14 is opened in the center of columned bearing body 10, and is axially penetrated through from contact surface 11 to bottom surface 12, uses
In accommodating rotating shaft 40.The oil guide groove 15 is two, is opened on the contact surface 11, and outside cross connection lower shaft hole 14 and bearing
Portion.Counterclockwise spiral extends to two flat parts 131 to two oil guide groove 15 centered on lower shaft hole 14 respectively.The contact surface
Two first projections 16 are also formed with 11, formed with the second projection 17 on bottom surface 12.It is flat that two first projection 16 is formed at two
Between portion 131, that is to say, that the line between line and two flat parts 131 between two first projections 16 intersects vertically, intersection point
For the axle center of lower shaft hole 14.First projection 16 includes upper surface 161 and the snap-latch surface extended vertically downward from upper surface 161
162 and outside wall surface 163.The outside wall surface 163 docks connection with the side 13 of bearing body 10, and radian is identical.This is two second convex
As the shape of the first projection 16, the lengthwise position of the second projection 17 corresponds the shape of post 17 with two first projections 16.
Lid 20 is substantially in the form of annular discs on this, it include capping 21 on one, lower capping 22 and from capping on this 21 periphery to
It is lower to extend and connect the side cover face 23 of lower capping 22.Capping 21 is circular plate-like shape on this, and its middle part is provided with a upper shaft hole 211, should
The lower shaft hole 14 of upper shaft hole 211 and bearing body 10 is concentric, and its aperture is equal with the aperture of the lower shaft hole 14 of bearing body 10,
Facing each other and connection is collectively forming the axis hole of the bearing 100 after both assemblings.The lower capping 22 is a plane, itself and bearing sheet
The contact surface 11 of body 10 docks.The side cover face 23 is extended downward vertically by the periphery of upper capping 21 to be formed, the phase in the side cover face 23
Both sides are formed with two openings 231, the shape of two opening 231 is corresponding with the first projection 16, the first projection 16 is held in interior.
Bearing body 10 and the assembling of upper lid 20 form an entirety, the lower cover of the contact surface 11 of bearing body 10 and upper lid 20
Face 22 connects, and two first projections 16 on contact surface 11 is caught in two openings 231 of lid 20, is used in present embodiment
The mode of sintering connects bearing body 10 and upper lid 20.After the completion of sintering, upper lid 20 is covered in the contact surface 11 of bearing body 10
In oil guide groove 15 so that formed between upper lid 20 and bearing body 10 in bearing 100 two transverse directions, connect lower shaft hole
14 with the Oil Guide passage 24 of Bearing outer.Certainly, the oil guide groove 15 can also be formed on the lower capping 22 of lid 20 or simultaneously
Be formed at the contact surface 11 of bearing body 10 with the lower capping 22 of upper lid 20, so as to after upper lid 20 is combined with bearing body 10
Oil Guide passage 24 is formed between the face that both are in contact.Radially putting down in the bearing body 10 of the lid 20 in the bearing 100 on this
Exceed the bearing body 10 at smooth portion 131, the Oil Guide passage 24 leads to the flat of the bearing body 10 by the axis hole of the bearing 100
Portion 131.The upper surface 161 of first projection 16 and the flush of upper capping 21 of upper lid 20.
Please refer to Fig. 4 and Fig. 5, during concrete application, the bearing 100 is arranged in an axle sleeve 30, and a rotating shaft 40 is worn
In the lower shaft hole 14 of bearing 100, and extend to by the upper shaft hole 211 of the upper lid 20 outside of upper lid 20.The axle
Set 30 includes the cylindric sleeve 34 that a bottom plate 32 and being upwardly extended by the periphery of the bottom plate 32 is formed, the sleeve 34 it is interior
Footpath and the diameter of upper lid 20 are roughly equal, so that upper lid 20 can be contained in the sleeve 34 completely.The bottom of the bearing body 10
End is resisted against on bottom plate 32, and specifically, the second projection 17 of the bottom surface 12 of bearing body 10 is resisted against on bottom plate 32, by bearing
The bottom surface 12 of body 10 and the bottom plate 32 of axle sleeve 30 separate, and the space of the separation forms the first oil storage space 50.Bearing body 10
Side wall and the inwall of sleeve 34 of axle sleeve 30 fit, be mutually divided into the second oil storage space between flat part 131 and the inwall of sleeve 34
60.First oil storage space 50 is connected with the second oil storage space 60, and the second oil storage space 60 connects with Oil Guide passage 24.Described
Lubricating fluid is full of between one oil storage space 50, the second oil storage space 60 and the bearing body 10 and rotating shaft 40.
In use, the rotating shaft 40 rotates extruding lubricating fluid, it is dynamic so as to be established between bearing body 10 and rotating shaft 40
Pressure, prevents from directly contacting therebetween.During the rotating shaft 40 rotates, the lubrication flow in first oil storage space 50
Body is risen in the gap between rotating shaft 40 and bearing body 10, the partial lubrication fluid between the rotating shaft 40 and bearing body 10
It can be flowed in the second oil storage space 60, then be back in the first oil storage space 50 by the guiding of Oil Guide passage 24.Due to connecing
Oil Guide passage 24 is offered at contacting surface 11, the pressure of lubricating fluid herein is less than side cover face 23 and the sleeve 34 of upper lid 20
Pressure between inwall, lubricating fluid are easy to flow out at Oil Guide passage 24, can effectively prevent from moistening after rising to contact surface 11
Slip-stream body continues to rise and splashes to the outside of bearing 100, so as to play the effect for protecting oil.And because Oil Guide passage 24 is with rotating shaft
Centered on 40, and along the rotation direction spiral of rotating shaft 40, be advantageous to rise to the lubricating fluid of the contact surface 11 of bearing body 10
Guided from Oil Guide passage 24, and then reach the purpose and lubricating fluid of establishing dynamic pressure between rotating shaft 40 and bearing body 10
The effect of backflow.
Fig. 6 is the flow chart of the manufacture method for the bearing that embodiment of the present invention provides, and its step includes：
Bearing die is provided；
With material injection molding method by the mixture of metal dust and bond vitrified agent inject in the bearing die with
Bearing 100 is formed, the bearing 100 includes lid 20 on a bearing body 10 and one, and in ejection formation in the bearing body 10
Oil Guide passage 24 is formed between upper lid 20.In the present embodiment, the bearing body 10 and upper lid 20 first distinguish ejection formation, then
Sinter bonded is together.
The bearing 100 by metal dust and being mixed for melt adhesive by form ejection formation, the manufacture method
Because metal dust is by melting, the structure for making ejection formation and being obtained after solidifying has the material gap of very little, after making shaping
The structure hole of inner surface of bearing 100 to compare traditional oiliness bearing very small so that bearing 100 subtracts in use
Friction between the axis hole and appearance of few lubricating fluid and bearing 100, reduces resistance, so as to the rotation beneficial to rotating shaft 40, and drops
The abrasion of low bearing 100, extend the life-span.
The bearing 100 is formed by metal dust ejection formation, also than the system of existing ball bearing and fluid bearing etc.
It is low to make cost.Making bearing 100 using the technique of metal dust ejection formation can also make bearing 100 have higher intensity,
Therefore the service life of bearing 100 can be extended.And because this kind of preparation method make made of element there is very high freedom shape,
And then it is easier to control the thickness and shape of the bearing 100, so that the part close to net shape can be obtained to greatest extent, effectively
Following process amount is reduced, and is more beneficial for manufacturing the part of high-melting-point, high intensity, complicated shape relative to other molding modes,
Easily realize automation, produce in enormous quantities, can significantly save cost.And using split production bearing body 10 and upper lid
20, then by both combine be collectively forming Oil Guide passage 24 when, simplify manufacturing process, avoid in same process make a complexity
Structure and caused by technique and its requirements it is excessively harsh and cumbersome.Another bearing body 10 can be in sinter bonded with upper lid 20
During both integrative controls concentricity, than saving assembly cost using other alignments and connected mode.
It is understood that for the person of ordinary skill of the art, it can be conceived with the technique according to the invention and done
Go out change and deformation that other various pictures are answered, and all these changes and deformation should all belong to the protection model of the claims in the present invention
Enclose.
Claims (8)
1. a kind of bearing, including bearing body and upper lid, the bearing is provided with axis hole, and the axis hole runs through bearing body and upper lid,
It is characterized in that：The bearing by metal dust and bond vitrified agent mixture ejection formation, and in ejection formation in the axle
Hold Xing Cheng Transverse between body and upper lid to Oil Guide passage, the Oil Guide passage penetrates the axis hole of the bearing and Bearing outer, the axle
Body and upper lid ejection formation, and being sintered together respectively are held, upper shaft hole is formed on lid on this, lower axle is formed on the bearing body
Hole, the upper shaft hole connect the axis hole for being collectively forming the bearing with lower shaft hole, and the bearing body includes contact surface and from outside contact surface
The flat part that side extends downwardly, cover on this and be covered on the contact surface, covered on this in the bearing radially in the bearing body
Flat part at exceed the bearing body, the Oil Guide passage is led to the flat part of the bearing body by the axis hole of the bearing.
2. bearing as claimed in claim 1, it is characterised in that：Oil guide groove is formed on the contact surface of the bearing body, so that
Upper lid forms the Oil Guide passage after being combined with bearing body between the face that both are in contact.
3. bearing as claimed in claim 1, it is characterised in that：The Oil Guide passage counterclockwise snail centered on axis hole
Rotation extends to flat part.
4. bearing as claimed in claim 1, it is characterised in that：The first projection is formed on the contact surface, to should on upper lid
First projection is sticked in the opening formed with opening, first projection.
5. a kind of bearing arrangement, including rotating shaft, it is characterised in that：Also include the axle as described in Claims 1-4 any one
Hold, the rotating shaft is rotationally installed in the axis hole of the bearing, and lubricating fluid is filled between the rotating shaft and bearing.
6. bearing arrangement as claimed in claim 5, it is characterised in that：The bearing is installed in an axle sleeve, and the axle sleeve includes
Bottom plate and sleeve, axle is resisted against formed with the second projection, second projection on the bearing body bottom surface relative with contact surface
On the bottom plate of set, so that the bottom surface of bearing body and the bottom plate interval of axle sleeve form the first oil storage space, the bearing body
Partial sidewall and sleeve separately and form the second oil storage space, during the axis of rotation, the portion between the rotating shaft and bearing body
After dividing lubricating fluid to be flowed up along axis hole, the second oil storage space is flowed to through Oil Guide passage, then be back to the first oil storage space
And reciprocation cycle.
7. a kind of manufacture method of bearing, comprises the following steps：
Bearing die is provided；
Metal dust and the mixture of bond vitrified agent are injected in the bearing die to be formed with material injection molding method
Bearing, the bearing include a Shang Gai and a bearing body, and in ejection formation between the bearing body and upper lid shape into Transverse to
Oil Guide passage, the bearing body and upper lid ejection formation respectively, and be sintered together, form upper shaft hole on lid on this, the axle
Hold and lower shaft hole is formed on body, the upper shaft hole connects the axis hole for being collectively forming the bearing with lower shaft hole, and the bearing body includes connecing
Contacting surface and the flat part extended downwardly on the outside of the contact surface, cover on this and be covered on the contact surface, covered on this in the footpath of the bearing
Exceed the bearing body at the flat part of the bearing body upwards, the Oil Guide passage leads to the bearing sheet by the axis hole of the bearing
The flat part of body.
8. the manufacture method of bearing as claimed in claim 7, it is characterised in that：The bearing body and upper lid project into respectively
Type, and sinter bonded is together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210078978.0A CN103322034B (en) | 2012-03-23 | 2012-03-23 | Bearing and its manufacture method and the bearing arrangement using this kind of bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210078978.0A CN103322034B (en) | 2012-03-23 | 2012-03-23 | Bearing and its manufacture method and the bearing arrangement using this kind of bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103322034A CN103322034A (en) | 2013-09-25 |
| CN103322034B true CN103322034B (en) | 2018-01-05 |
Family
ID=49190990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210078978.0A Expired - Fee Related CN103322034B (en) | 2012-03-23 | 2012-03-23 | Bearing and its manufacture method and the bearing arrangement using this kind of bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103322034B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003232354A (en) * | 2002-02-07 | 2003-08-22 | Hitachi Powdered Metals Co Ltd | Bearing unit and production method for the same and spindle motor |
| CN100383422C (en) * | 2004-07-16 | 2008-04-23 | 台达电子工业股份有限公司 | Combined type hydrodynamic bearing device and manufacturing method thereof |
| JP4531584B2 (en) * | 2005-02-17 | 2010-08-25 | Ｎｔｎ株式会社 | Fluid dynamic bearing device and motor provided with the same |
| JP4916673B2 (en) * | 2005-04-19 | 2012-04-18 | Ｎｔｎ株式会社 | Hydrodynamic bearing device |
| JP5154057B2 (en) * | 2006-10-27 | 2013-02-27 | Ｎｔｎ株式会社 | Hydrodynamic bearing device |
| CN101205949B (en) * | 2006-12-22 | 2010-12-29 | 富准精密工业(深圳)有限公司 | Method for manufacturing hydrodynamic bearing and rotating shaft |
-
2012
- 2012-03-23 CN CN201210078978.0A patent/CN103322034B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103322034A (en) | 2013-09-25 |
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| PB01 | Publication | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180105 Termination date: 20190323 |
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| CF01 | Termination of patent right due to non-payment of annual fee |