CN2756893Y - Fluid dynamic pressure bearing device - Google Patents
Fluid dynamic pressure bearing device Download PDFInfo
- Publication number
- CN2756893Y CN2756893Y CN 200420102040 CN200420102040U CN2756893Y CN 2756893 Y CN2756893 Y CN 2756893Y CN 200420102040 CN200420102040 CN 200420102040 CN 200420102040 U CN200420102040 U CN 200420102040U CN 2756893 Y CN2756893 Y CN 2756893Y
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- Prior art keywords
- bearing
- fluid dynamic
- diameter
- sealing cover
- bearing device
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Abstract
The utility model relates to a dynamic pressure bearing device of a fluid, which comprises a bearing provided with an axle hole, and a rotary axle which can be installed in the axle hole in a rotation mode to form a certain gap with the bearing, a lubricating fluid is stored in the gap, and a necking part is arranged on the rotary axle. The dynamic pressure bearing device further comprises a sealing cover installed on the bearing, the sealing cover is provided with a clamping hole which can contain the necking part and prevent the rotary axle from desquamating from the axle hole, and a clamping structure for fixing the sealing cover to the bearing is formed between the sealing cover and the bearing. The dynamic pressure bearing device of a fluid of the utility model has a good sealing and anti-pulling effect.
Description
[technical field]
The utility model relates to fluid dynamic-pressure bearing device, is meant a kind of sealing and anti-pulling structure of fluid dynamic-pressure bearing device especially.
[background technique]
Present stage, fluid dynamic-pressure bearing device has been applied in motor, particularly fan motor and the disk drive motor more and more, to reduce the rotating shaft wearing and tearing, prolongs the working life of motor, reduces the noise when rotating.
Traditional fluid dynamic-pressure bearing device generally comprise a bearing, be positioned at bearing and and bearing between have the main shaft of certain interval, wherein, this gap internal memory contains lubricating fluid, bearing or main shaft are provided with pressure and produce groove.When having certain relative running speed between main shaft and bearing, between main shaft and bearing, form certain lubricating fluid layer, because pressure produces the effect of groove, this lubricating fluid layer produces certain pressure to main shaft, the supports main shaft rotation, and the vibration that main shaft is produced in operation process reduces, running is stable, and directly do not contact with bearing during main axis rotation, thereby reduce wearing and tearing and noise, prolong the working life of bearing.
When the design hydrodynamic pressure bearing, need consider following factor: first, bearing need have good sealing effect, this be because, the leakage of lubricating fluid will cause the lubricating fluid in the bearing to reduce, what influence bearing builds the pressure effect, make rotating shaft in the running because of not producing enough pressure and bearing wall friction on every side, reduce the working life of bearing; In addition,, will make external dust enter bearing internal contamination lubricating fluid, influence lubricating fluid viscosity if the sealing effect of bearing is not good, so influence bearing build the pressure effect.The second, bearing need have anti-pulling structure, when motor rotor runs up, can in bearing, produce " drift " phenomenon, make rotor vertically away from the bearing bottom, even from bearing, break away from, therefore, industry wishes to design a kind of tool excellent sealing and the anti-fluid dynamic-pressure bearing device of effect that pulls out.
[model utility content]
The technical problems to be solved in the utility model provides a kind of have excellent sealing and the anti-fluid dynamic-pressure bearing device of effect that pulls out.
For solving the problems of the technologies described above, the utility model provides a kind of fluid dynamic-pressure bearing device, comprise a bearing, that is provided with axis hole be rotatably installed in the axis hole and bearing between have the rotating shaft of certain interval, this gap internal memory contains lubricating fluid, this rotating shaft is provided with a necking section, this Hydrodynamic bearing apparatus comprises that further one is mounted to the sealing cover on the bearing, the sealing lid is offered ccontaining this necking section and can prevent the hole clipping that this rotating shaft comes off from this axis hole, and the formation fixing seal covers the interface arrangment to bearing between sealing cover and bearing.
The utility model fluid dynamic-pressure bearing device utilizes interface arrangment that sealing cover is fixed on the bearing, and the hole clipping of sealing cover is contained in the necking section wherein, and can prevent that this rotating shaft from coming off from axis hole, plays good sealing and the anti-effect of pulling out.
[description of drawings]
In order better to understand the utility model and to show the situation of the present utility model of implementing, will be in conjunction with the accompanying drawings, be introduced by example.Description of drawings is as follows:
Fig. 1 is the utility model fluid dynamic-pressure bearing device first embodiment's a sectional view.
Fig. 2 is the utility model fluid dynamic-pressure bearing device second embodiment's a sectional view.
Fig. 3 is the utility model fluid dynamic-pressure bearing device the 3rd embodiment's a sectional view.
[embodiment]
See also Fig. 1, the utility model fluid dynamic-pressure bearing device comprises that bearing 10, that a middle part is provided with axis hole 12 is rotatably installed on the rotating shaft 20 in the axis hole 12 and is installed on the sealing cover 40 on bearing 10 tops.Two supporting surfaces that move relatively of this fluid dynamic-pressure bearing device contain lubricating fluid between the internal surface of the outer surface of i.e. rotating shaft 20 and bearing 10.When rotating shaft 20 is rotated, between this two supporting surface, produce certain pressure, supporting revolving shaft 20 runnings.Rotating shaft 20 is provided with the less necking section of a diameter 22.
The sealing of bearing 10 bottoms, its longitudinal cross-section roughly is " U " shape.One thrust washer 14 is positioned on the bearing 10 of axis hole 12 bottoms, axially support rotating shaft 20.This thrust washer 14 is made by wear-resisting and ganoid material, reduces the friction of thrust washer 14 upper surfaces and rotating shaft 20 bottoms.A circular port 15 is offered on bearing 20 tops, and the diameter of this circular port 15 is greater than the diameter of axis hole 12.A circular containing groove 16 is offered in circular port 15 bottoms, and the diameter of this containing groove 16 forms an annular region greater than the diameter of circular port 15 in circular port 15 bottoms.
During installation, push sealing cover 40, make annulus 44 pass the circular port 15 of bearing 10, be contained in the containing groove 16.In this process, when sealing cover 40 is positioned at the circular port 15 of bearing 10, because the diameter of annulus 44 is greater than the diameter of circular port 15, the bearing 10 extruding annulus 44 inside resiliently deformables around the circular port 15.When sealing cover 40 passes circular port 15 and enters containing groove 16, because the diameter of annulus 44 is less, annulus 44 recovers resiliently deformable, and annulus 44 upper surfaces of flange 46 outer ends and the bearing 10 on annular region top are leant, and prevents that sealing cover 40 from moving axially along containing groove 16.At this moment, flange 46 leans with circular port 15 bearing wall on every side, prevents that sealing cover 40 from moving radially along bearing 10, is mounted to sealing cover 40 in the bearing 10.
Push rotating shaft 20, make its hole clipping of passing sealing cover 40 42, the sealing cover 40 inside resiliently deformables around the extruding hole clipping 42,22 enter this hole clipping 42 up to the necking section, because necking section 22 diameters are less, sealing cover 40 recovers deformation, and necking section 22 is housed in the hole clipping 42.Again since the diameter of necking section 22 upper and lower part rotating shafts 20 greater than hole clipping 42 diameters, sealing cover 40 is positioned at rotating shaft 20 in the bearing 10, prevents that rotating shaft 20 from coming off because of moving axially from axis hole 12 along axis hole 12.
In the utility model fluid dynamic-pressure bearing device, sealing cover 40 is positioned at rotating shaft 20 in the axis hole 12, prevents that rotating shaft 20 from coming off from bearing 10 vertically, plays anti-effect of pulling out.Sealing is covered the good sealing effect of 40 tools, can prevent effectively that lubricating fluid from leaking and outside foreign material enter the pollution lubricating fluid.
Figure 2 shows that the utility model second embodiment's cut-away view, fluid dynamic-pressure bearing device comprises that the bearing 210, that a middle part is provided with axis hole is rotatably installed on rotating shaft 20 in the axis hole and the sealing cover 240 that combines with bearing 210 tops in the present embodiment.Its rotating shaft 20 structures are identical with first embodiment.
A circular port is offered on the top of present embodiment middle (center) bearing 210, and the external diameter at bearing 210 tops offers mounting groove 216 less than the external diameter of bearing 210 bottoms in bearing 210 top periphery.
Sealing cover 240 comprise a middle part be provided with the annulus 241 of hole clipping, by the upwardly extending flange 242 in annulus 241 edges, the ringwall 244 that extends vertically downward by flange 242 outward extending horizontal parts 243, by horizontal part 243 and the clamping part 245 that extends internally by ringwall 244 free ends.Wherein, flange 242 is positioned at the circular port of bearing 210.Horizontal part 243 combines with the upper surface and the outer wall at bearing 210 tops respectively with ringwall 244, the equal diameters of the diameter of ringwall 244 outer walls and bearing 210 bottoms, and the thickness of ringwall 244 depends on that the diameter of bearing 210 tops and bearing 210 bottoms is poor.Clamping part 245 is fastened in the mounting groove 216, and sealing cover 240 is fixed to bearing 240 tops.
Figure 3 shows that the utility model the 3rd embodiment's sectional view, fluid dynamic-pressure bearing device comprises that the bearing 310, that a middle part is provided with axis hole is rotatably installed on rotating shaft 20 in the axis hole and the sealing cover 340 that combines with bearing 310 tops in the present embodiment.Its rotating shaft 20 structures are identical with first embodiment.
The external diameter at present embodiment middle (center) bearing 310 tops is offered a mounting groove 316 less than the external diameter of bearing 310 bottoms in bearing 310 top periphery.The circular port 315 of a diameter greater than shaft hole diameter offered on bearing 310 tops, forms a plane 317 in circular port 315 bottoms.Sealing cover 340 comprises that one is positioned at the locating piece 345 that snap close piece 341 and on bearing 310 planes 317 is installed on bearing 310 tops.Snap close piece 341 middle parts are provided with a hole clipping 342, to accommodate the rotating shaft 20 at 22 places, necking section.
Locating piece 345 has a perforate 346 that allows rotating shaft 20 pass, and extends to form a flange 347 downwards by perforate 346 edges, and this flange 347 contacts with snap close piece 341, snap close piece 341 tightly is pressed on the plane 317 of bearing 310.Locating piece 345 outer rims extend to form a ringwall 348 downwards, and this ringwall 348 combines with the outer wall at bearing 310 tops.The thickness of ringwall 348 depends on that the diameter of bearing 310 tops and bottom is poor.The free end of ringwall 348 clamping part 349 that extended internally, this clamping part 349 is fastened in the mounting groove 316, thereby locating piece 345 is fixed to bearing 310 tops.
Claims (10)
1. fluid dynamic-pressure bearing device, comprise a bearing, that is provided with axis hole be rotatably installed in the axis hole and bearing between have the rotating shaft of certain interval, this gap internal memory contains lubricating fluid, it is characterized in that: this rotating shaft is provided with a necking section, this Hydrodynamic bearing apparatus comprises that further one is mounted to the sealing cover on the bearing, the sealing lid is offered ccontaining this necking section and can prevent the hole clipping that this rotating shaft comes off from axis hole, and the formation fixing seal covers the interface arrangment to bearing between sealing cover and bearing.
2. fluid dynamic-pressure bearing device as claimed in claim 1, it is characterized in that: the circular port of a diameter greater than shaft hole diameter offered on described bearing top, sealing cover is contained in this circular port, interface arrangment comprises the containing groove that is arranged at the circular port bottom, the diameter of this containing groove is greater than the circular port diameter, and the sealing cover edge is placed in this containing groove.
3. fluid dynamic-pressure bearing device as claimed in claim 2 is characterized in that: described interface arrangment comprises that this flange is contained in the circular port of bearing by the upwardly extending flange of sealing cover.
4. fluid dynamic-pressure bearing device as claimed in claim 1 is characterized in that: the ringwall that described interface arrangment comprises the mounting groove that is opened in the bearing top periphery, extended downwards by the sealing cover outer rim and extended internally by the ringwall free end and to be snapped in clamping part in the mounting groove.
5. fluid dynamic-pressure bearing device as claimed in claim 4 is characterized in that: the external diameter at described bearing top is less than the external diameter of bearing bottom, and the external diameter of this ringwall equates with the external diameter of bearing bottom.
6. fluid dynamic-pressure bearing device as claimed in claim 1, it is characterized in that: the circular port of a diameter greater than axis hole offered at described bearing top, sealing cover comprises that one is contained in the snap close piece in the circular port and is installed on the locating piece of bearing top with the location snap close piece, described hole clipping is located on the snap close piece, and this locating piece comprises a perforate that can allow rotating shaft pass.
7. fluid dynamic-pressure bearing device as claimed in claim 6 is characterized in that: the ringwall that described interface arrangment comprises the mounting groove that is opened in the bearing top periphery, extended downwards by the locating piece outer rim, and extended internally by the ringwall free end and to be snapped in clamping part in the mounting groove.
8. fluid dynamic-pressure bearing device as claimed in claim 6 is characterized in that: described locating piece comprises the flange that is extended by verge of opening, the downward pressing lock fastener of this flange downwards.
9. fluid dynamic-pressure bearing device as claimed in claim 1 is characterized in that: described hole clipping diameter is greater than the necking section diameter, less than the diameter of upper and lower part, necking section rotating shaft.
10. fluid dynamic-pressure bearing device as claimed in claim 1 is characterized in that: the bottom sealing of described bearing, its longitudinal cross-section roughly is " U " shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420102040 CN2756893Y (en) | 2004-11-26 | 2004-11-26 | Fluid dynamic pressure bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420102040 CN2756893Y (en) | 2004-11-26 | 2004-11-26 | Fluid dynamic pressure bearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2756893Y true CN2756893Y (en) | 2006-02-08 |
Family
ID=35965280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420102040 Expired - Lifetime CN2756893Y (en) | 2004-11-26 | 2004-11-26 | Fluid dynamic pressure bearing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2756893Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8100673B2 (en) | 2008-02-29 | 2012-01-24 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | Cooling fan |
-
2004
- 2004-11-26 CN CN 200420102040 patent/CN2756893Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8100673B2 (en) | 2008-02-29 | 2012-01-24 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | Cooling fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141126 Granted publication date: 20060208 |