CN2720182Y

CN2720182Y - Improved structure of dynamic-pressure bearing

Info

Publication number: CN2720182Y
Application number: CN 200420089007
Authority: CN
Inventors: 黄淑卿
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-23
Filing date: 2004-08-23
Publication date: 2005-08-24
Anticipated expiration: 2014-08-23

Abstract

The utility model relates to a modified structure of dynamic-pressure bearing, which is provided with a bearing. The bearing is provided with an axle hole penetrating the bearing. The periphery of the axle hole is provided with a plurality of sloped flat surfaces extending along the axial direction. One end of the flat surface with larger angle of slope is provided with a concave dynamic pressure generating ditch which is uniformly distributed on the periphery of the axle hole by means of partition of the flat surface and is opposite to the position of the bearing center at a certain angle of slope. Thereby, the easy processing and mass production are realized, and the position of the axial center can also be stable for holding the axial center of the bearing on the central position.

Description

The structure-improved of dynamic pressure type bearing

Technical field

The utility model relates to a kind of structure-improved of dynamic pressure type bearing, especially refers to a kind ofly directly offer most the dynamic pressure type bearings that extend and be skewed plane vertically at bearing inner wall.

Background technique

Bearing is to be applied on the rotary parts for a kind of, is used for supporting, reducing friction, and the device that bears load, for example be applied in spindle motor etc.And day by day progressive along with science and technology, relative part is also more and more little and more and more accurate, and to require the precision of bearing relatively but be more and more high; In general, the bearing of precision prescribed is modal to be ball bearing, but but have some problems, includes that noise is big, rotating accuracy is not enough, and the miniaturization cost is high excessively, and can't meet small-sized and accurate requirement.

In order to reach above-mentioned requirement, and further lower the friction of rotating, FDB also with appearance, not only the precision height, noise is low and shock resistance is strong.The FDB summary has two kinds, and static pressure and Hydrodynamic bearing, hydrostatic bearing are that normality lower bearing inside just has the fluid lubrication medium, during rotation, can utilize the pressure support of fluid to play the axle center, if desaxe, then, make the axle center return back to the tram in the pressurization of skew side; But because normality lower bearing inside has a large amount of fluid lubrication media, so for general small-sized and stress accurate rotary parts and be not suitable for.And hydraulic bearing has trickle groove for bearing hole inside, and groove inside has lubricant medium (because be trickle groove, so the amount of lubricant medium is quite few), when rotating in the axle center, lubricant medium in the groove can be drawn, and set up a dynamic pressure, and the axle center is supported on the position of central authorities.

Please refer to shown in Figure 1, it is a kind of motor that is applied on the fan, this motor has a motor base 100, this motor base 100 is provided with a upwardly extending bearing housing 110, be coated with a bearing 120 in this bearing housing 110, please refer to shown in Figure 2, be provided with an axis hole 121 in this bearing 120, the wall of these axis hole 121 peripheries is provided with similar fish-bone and is arranged in together, and radially the dynamic pressure of extending produces ditch 122, this dynamic pressure produces ditch 122 and is by two ends gradually to " people " word shape of internal condensation, and produce between the group of ditch in this dynamic pressure and be provided with that several are centered around axis hole 121 peripheries and are link spring shape escape hole 123, and these bearing housing 110 peripheral sleeves are provided with a motor stator 130, be arranged with a motor rotor 140 on this motor stator 130, these motor rotor 140 peripheries are provided with flabellum 141, in addition, this motor rotor 140 is provided with an axle center 143 that is set in the axis hole 121, and wherein be provided with the magnet 142 relative with motor stator 130, this kind device construction in use, produce 122 pairs of lubricant medium generation tractions in axis hole 121 of ditch though can see through dynamic pressure, and then the generation dynamic pressure, and axle center 143 is supported on the position that remains on central authorities.

But, because be the relation of dynamic pressure, so 143 when just having started in the axle center, pressure is set up as yet, so can cause abrasion, and to make quite difficulty of endoporus processing in bearing 120 inside, precision is difficult to grasp (in general, groove width is about 10 μ m, and the degree of depth is then littler), so, in bearing 120, offer the herring-bone form dynamic pressure of radially extending and produce ditch,, be difficult for especially especially to all processer's a major challenge, thus, might finish so shape with existing processing mode,, also can improve because of precision causes the degree of difficulty of processing even can do shape processing like this, on making, seem very inconvenient, more cause the difficulty of quantification.

Summary of the invention

A purpose of the present utility model is to provide a kind of structure-improved of dynamic pressure type bearing, be a kind of being applied on the rotary parts, be used for supporting, reduce friction, and the device that bears load, for example be applied on the motor spindle, this device is provided with a bearing, be provided with an axis hole that runs through wherein in this bearing, this axis hole periphery is provided with and a plurality ofly extends vertically and be skewed plane, this interplanar and the recessed respectively dynamic pressure generation ditch that forms, thus, during fabrication, this plane can see through instrument easily and be opened in the axis hole periphery, dynamic pressure produces ditch then can be equally distributed on the axis hole periphery through the separation on plane, the yield of not only escapable cost, and product also can increase, and reaches the simple and easy and mass producible purpose of processing, the fluid that more can make the dynamic pressure that is poured in everywhere produce ditch is subjected to the centrifugal force traction, on average penetrate to the axle center, and then firm shaft core position, the axle center in bearing is remained on the position of central authorities.

Another purpose of the present utility model is to provide a kind of structure-improved of dynamic pressure type bearing, and its plane can be cutting shape plane or is lonely face.

A purpose more of the present utility model is to provide a kind of structure-improved of dynamic pressure type bearing, and the angle between its plane initial point and terminating point can be angle arbitrarily, and the axis hole periphery is cut into various geometrical shapies.

Another purpose of the present utility model is to provide a kind of structure-improved of dynamic pressure type bearing, and certain part on its plane can be offered along aperture axis to the hole of escaping of extending and be link spring shape, and this escapes the hole can become plane separation two to several parts.

The utility model is to provide a kind of structure-improved of dynamic pressure type bearing, be provided with a bearing, be provided with an axis hole that runs through wherein in this bearing, this axis hole periphery is provided with and a plurality ofly extends vertically and be skewed plane, the end that this flat inclination is bigger is provided with recessed dynamic pressure and produces ditch, this dynamic pressure produces ditch and on average is dispersed in the axis hole periphery by the separation on this plane, and with certain angle of inclination in the face of the bearing centre position.

The utility model is to provide a kind of structure-improved of dynamic pressure type bearing, and the surface on this plane is cutting shape plane.

The utility model is to provide a kind of structure-improved of dynamic pressure type bearing, and the surface on this plane is an arc surfaced.

The utility model is to provide a kind of structure-improved of dynamic pressure type bearing, this plane be provided with one along aperture axis to the hole of escaping of extending and be link spring shape, this escape the hole with the plane with produce ditch in interplanar dynamic pressure and be separated into two to several parts.

The utility model is to provide a kind of structure-improved of dynamic pressure type bearing, and this axis hole periphery cuts into geometrical shape.

It is simple and easy and can produce in a large number that the utility model can reach processing, and also firm shaft core position remains on the central position axle center in bearing.

Description of drawings

Fig. 1 commonly uses the compound section schematic representation of device.

Fig. 2 commonly uses the bearing sectional schematic diagram of device.

Fig. 3 bearing schematic perspective view of the present utility model.

Fig. 4 bearing first embodiment's of the present utility model sectional schematic diagram.

Fig. 5 bearing second embodiment's of the present utility model sectional schematic diagram.

Fig. 6 bearing the 3rd embodiment's of the present utility model sectional schematic diagram.

Fig. 7 bearing the 4th embodiment's of the present utility model sectional schematic diagram.

Fig. 8 bearing the 5th embodiment's of the present utility model sectional schematic diagram.

Fig. 9 bearing the 6th embodiment's of the present utility model sectional schematic diagram.

Figure 10 bearing the 7th embodiment's of the present utility model sectional schematic diagram.

Figure 11 bearing the 8th embodiment's of the present utility model sectional schematic diagram.

Figure 12 bearing one embodiment's of the present utility model schematic top plan view.

The another embodiment's of Figure 13 bearing of the present utility model schematic top plan view.

Figure 14 bearing of the present utility model is an embodiment schematic top plan view again.

Figure 15 another embodiment's of bearing of the present utility model schematic top plan view.

Embodiment

Relevant the utility model is for reaching above-mentioned purpose, and technological means that is adopted and effect thereof are lifted a possible embodiments and cooperate drawing that details are as follows now, in order to do making the auditor be easier to understand to structure of the present utility model.

Please cooperate and consult shown in Fig. 3～11, the utility model is a kind of structure-improved of dynamic pressure type bearing, it is to be applied on the rotary parts for a kind of, be used for supporting, reduce friction, and the device that bears load, for example be applied on the fan motor, please refer to shown in Figure 1ly, this motor has a motor base 100, and this motor base 100 is provided with a upwardly extending bearing housing 110, these bearing housing 110 peripheral sleeves are provided with a motor stator 130, be arranged with a motor rotor 140 on this motor stator 130, these motor rotor 140 peripheries are provided with flabellum 141, in addition, this motor rotor 140 is provided with an axle center 143, and wherein is provided with the magnet 142 relative with motor stator 130.

In addition, be coated with a bearing 10 in this bearing housing 110, be provided with an axis hole 11 that runs through wherein in this bearing 10, these axis hole 11 peripheries are provided with and a plurality ofly extend vertically and be skewed plane 14, this plane 14 is to mill out by milling machine, and the bigger end in these 14 angles of inclination, plane is respectively equipped with the dynamic pressure that is invaginated type and produces ditch 12, this dynamic pressure produces in the ditch 12 and contains the fluid lubrication medium, thus, during fabrication, this plane 14 is opened in axis hole 11 peripheries, dynamic pressure produces ditch 12 then can be equally distributed on axis hole 11 peripheries through the separation on plane 14, and the certain angle of inclination of energy is in the face of the central position of bearing 10, not only escapable cost, and the yield of product also can increase, and reaching the simple and easy and mass producible purpose of processing, the fluid that more can make the dynamic pressure that is poured in everywhere produce ditch 12 is subjected to the centrifugal force traction, on average penetrates to bearing 10 central positions, and then be stabilized in the axle center (not shown) of bearing 10 central positions, the axle center in bearing 10 is remained on the position of central authorities.

Please refer to shown in Fig. 4～7, the surface on its plane 14 can be cutting shape plane or is cambered surface, and certain part on this plane 14 can offer along axis hole 11 radially extend and be link spring shape escape hole 13, this escapes hole 13 can be separated into two to several parts (as Fig. 8～11) with plane 14 and dynamic pressure generation ditch 12, in addition, angle between its plane 14 starting points and terminating point can be angle (Figure 12～15 drawings are denoted as A ° and B °) arbitrarily, and axis hole 11 peripheries are cut into various geometrical shapies, for example: it is then rectangular to cut into the four sides, cuts into six then for rhombus or the like.

Claims

1, a kind of structure-improved of dynamic pressure type bearing, it is characterized in that: be provided with a bearing, be provided with an axis hole that runs through wherein in this bearing, this axis hole periphery is provided with and a plurality ofly extends vertically and be skewed plane, the end that this flat inclination is bigger is provided with recessed dynamic pressure and produces ditch, this dynamic pressure produces ditch and on average is dispersed in the axis hole periphery by the separation on this plane, and with certain angle of inclination in the face of the bearing centre position.

2, the structure-improved of dynamic pressure type bearing according to claim 1 is characterized in that: the surface on this plane is cutting shape plane.

3, the structure-improved of dynamic pressure type bearing according to claim 1 is characterized in that: the surface on this plane is an arc surfaced.

4, the structure-improved of dynamic pressure type bearing according to claim 1 is characterized in that: this plane be provided with one along aperture axis to the hole of escaping of extending and be link spring shape, this escape the hole with the plane with produce ditch in interplanar dynamic pressure and be separated into two to several parts.

5, the structure-improved of dynamic pressure type bearing according to claim 1 is characterized in that: this axis hole periphery cuts into geometrical shape.