CN201916347U

CN201916347U - hydrodynamic bearing

Info

Publication number: CN201916347U
Application number: CN2010206269199U
Authority: CN
Inventors: 施文章
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-26
Filing date: 2010-11-26
Publication date: 2011-08-03
Anticipated expiration: 2020-11-26

Abstract

The utility model relates to a fluid dynamic pressure bearing, bearing inner diameter surface is equipped with a plurality of slots, and the slot has more than two most advanced in bearing inner diameter surface's circumference, has two kinds of different contained angles among this most advanced, and every kind of contained angle respectively has a plurality ofly. The utility model discloses a two kinds of different contained angle designs among two more than two pointed ends and the pointed end that this bearing internal diameter surface established, make fluid dynamic pressure bearing can be used for the different axle centers of different rotational speeds, also can be used for simultaneously with the axle center and have the fluid dynamic pressure of different rotational speeds to produce.

Description

Hydrodynamic pressure bearing

Technical field

The utility model relates to a kind of bearing bore diameter surface and has at least two with upper prong, and the hydrodynamic pressure bearing that has two kinds of different angles among the tip.

Background technique

General Winchester disk drive is used ball bearing (Ball Bearing) motor mostly, and it utilizes steel ball to support motor, can produce the friction of metal surface when motor rotates with steel ball.

Hydrodynamic pressure bearing (Fluid Dynamic Bearing is called for short FDB) then is to utilize oil film to replace steel ball, and its advantage is, lowers the metal covering contact when motor rotates, in theory probability that just can reduce wear.Fluid dynamic pressure bearing motor can effectively absorb external vibrations, the protection bearing surface, and,, help the use and the usefulness of Winchester disk drive so the noise, temperature, the wearing and tearing that produce decrease because surface friction reduces.When rotate in the axle center of hydrodynamic pressure bearing, lubricant oil can flow along groove, and last groove and lower groove lubricant oil all can push toward most advanced and sophisticated, thereby produce pressure between axle center and bearing, and lubricant oil pushes away bearing inner surface to the axle center, and the axle center can directly not contacted with bearing.And the rotating speed in groove corner dimension and axle center can influence the pressure that produces between axle center and bearing, and then influences lubrication effect.

And at the object of the utilization of relevant existing hydrodynamic pressure bearing be: the motor main shaft of Winchester disk drive, the motor main shaft of high definition DVD (HD DVD), the motor main shaft of small fan.And the groove tip that the bearing bore diameter of present existing hydrodynamic pressure bearing surface is set all is single angle, and the good and bad inequality of structural design benefit.Therefore, the groove tip that the bearing bore diameter of present existing hydrodynamic pressure bearing surface is set is because all be the design of single angle, so have the narrow restriction of the axle center speed range of application.

The model utility content

In view of this, the purpose of this utility model is to provide a kind of bearing bore diameter surface to have at least two with upper prong, and the hydrodynamic pressure bearing that has two kinds of different angles among the tip.

For achieving the above object, the utility model provides a kind of hydrodynamic pressure bearing, and described bearing bore diameter surface is provided with a plurality of grooves, and groove has the tip more than two in the circumference on bearing bore diameter surface, have two kinds of different angles among the tip, every kind of angle has a plurality of.

As preferred version, when the tip of the set groove in wherein said bearing bore diameter surface is eight, have two kinds of different angles among eight tips, every kind of angle has four.

The two kind different angles designs of the utility model by having among set tip more than two, this bearing bore diameter surface and the tip, make hydrodynamic pressure bearing can be used in the different axle center of different rotating speeds, simultaneously also can be used for concentric and the hydrodynamic pressure generating of different rotating speeds is arranged, therefore, be applicable to may the change in rotational speed scope when rotate in the axle center speed range of broad and axle center for the hydrodynamic pressure bearing that provides of the utility model.

Description of drawings

Fig. 1 is embodiment's stereogram of the present utility model;

Fig. 2 is the front elevation of Fig. 1;

Fig. 3 is the left hand view of Fig. 1;

Fig. 4 is the plan view of Fig. 1;

Fig. 5 is the worm's eye view of Fig. 1;

Fig. 6 is that the groove on the utility model bearing bore diameter surface launches schematic representation.

[element numbers explanation]

1 hydrodynamic pressure bearing, 2 groove 2A go up groove 2B lower groove

3 groove 3A go up groove 3B lower groove A angle

The B angle

Embodiment

Relevant feature of the present utility model and technology contents see also following embodiment and accompanying drawing, and embodiment and accompanying drawing only provide reference and explanation, are not to be used to limit the utility model.

See also shown in Figure 1ly, be embodiment's stereogram of the utility model hydrodynamic pressure bearing, Fig. 2 is the front elevation of Fig. 1, Fig. 3 is the left side view of Fig. 1, Fig. 4 is the plan view of Fig. 1, and Fig. 5 is the worm's eye view of Fig. 1, and Fig. 6 is that the groove on the utility model bearing bore diameter surface launches schematic representation.

See also shown in Figure 6ly, the bearing bore diameter surface of hydrodynamic pressure bearing 1 of the present utility model is provided with two grooves 2,3.And be provided with the tip (the utility model is the example explanation with eight) more than two in a circumference, two kinds of different included angle A, B are arranged among the tip, every kind of angle has four.

When rotate in the axle center of hydrodynamic pressure bearing 1, lubricant oil can flow along

groove

2,3, the lubricant oil of

last groove

2A, 3A and

lower groove

2B, 3B all can be toward most advanced and sophisticated extruding, thereby produce pressure between axle center and bearing, and lubricant oil pushes away bearing inner surface to the axle center, and the axle center can directly not contacted with bearing.Because of the size of groove 2 included angle A, B and the rotating speed in axle center can influence the pressure that produces between axle center and bearing, and then influence lubrication effect.So the utility model uses the

groove

2,3 of two kinds of different included angle A, B, so can use broad axle center rotating speed.With the DC fan utilization is example, and it mainly is applied as:

Hydrodynamic pressure bearing of the present utility model can be applied on the different DC fan of speed range, does not need because of the different groove angles that redesign in the hydrodynamic pressure bearing of rotation speed of the fan.

Hydrodynamic pressure bearing of the present utility model is more suitable for being applied on the DC fan of speed variable.

Therefore, the hydrodynamic pressure bearing of the utility model model utility design can be used in the different axle center of different rotating speeds, also can be used for simultaneously the concentric different rotating speeds hydrodynamic pressure generating, so can be applicable to may the change in rotational speed scope when rotate in the axle center speed range of broad and axle center.

The above; it only is preferred embodiment of the present utility model; therefore be not and limit scope of patent protection of the present utility model, thus the equivalent structure variation of using the utility model specification and accompanying drawing to do such as, all should be contained in protection domain of the present utility model in.

Claims

1. A hydrodynamic bearing, characterized in that the inner diameter surface of the bearing is provided with a plurality of grooves, the grooves have more than two tips within the circumference of the inner diameter surface of the bearing, and there are two different types of tips among the tips. There are multiple angles for each angle.

2. The fluid dynamic pressure bearing according to claim 1, characterized in that, when there are eight tips of the grooves on the surface of the inner diameter of the bearing, there are two different included angles among the eight tips, each There are four in each angle.