TW200930898A - Fan and its bearing structure - Google Patents

Abstract

The present invention provides a fan including a stator structure and a rotor structure coupled to the stator structure. The stator structure has a bearing base and a bearing disposed inside the bearing base, wherein the bearing has a groove formed on the surface thereof. The rotor structure has a shaft supported by the bearing.

Description

200930898 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a bearing structure, and more particularly to a fan and its bearing structure. [Prior Art] Fans have traditionally been used to dissipate heat generated during operation of electronic components within the system. As shown in the conventional fan, the fan includes a stator structure and a rotor structure. The stator structure includes a bearing housing 12 and a bearing disposed in the bearing housing 12.

❹ 14, to the common shaft of the rotor shaft 16 of the rotor structure. The bearing 14 includes an inner ring and an outer ring. The inner ring and the outer ring are relatively rotatable, the outer ring is tightly fitted with the bearing housing 12, and the inner ring is closely fitted with the rotating shaft I6. Therefore, it is necessary to have a considerable amount of deformation in order to achieve a tight fit. However, the deformation is a variation in the size of the fresh parts, and the parts are also subjected to uneven stress. During operation, the rotating bearing is generated by friction, and this heat also increases the degree of variation. In addition, the rotation of the shaft will cause dimensional variation due to heat expansion V, which will increase the wear and reduce the life of the bearing. Therefore, after a period of operation, this variation will affect the stability of the entire fan. SUMMARY OF THE INVENTION The purpose of j Ming is in the secret supply - the structure of the material. According to this (4) - _ ', Guan Tao - traits seat and one bearing set in the bearing housing, its shaft includes: groove structure; and - rotor structure wheel = bearing; shaft 'for the bearing The building. Preferably, the groove structure comprises a spiral groove, a groove, a longitudinal groove, an oblique groove, a ring groove, and a radial groove structure formed in the bearing. Ring surface or outer groove or a combination thereof. The concave-inner ring surface and an outer ring surface are recessed. Surface, or both

21707-CP/TW 5 200930898 material, the lang further includes _ impeller, _ y = comparison: r has a plurality of baffles, when the impeller rotates to guide a flow of air through the groove structure. The groove structure of the shaft includes a section, or a groove, a spiral groove, a radial groove, a longitudinal groove, and a bevel groove. According to another aspect of the present invention, the bearing structure includes a bearing block. And a bearing disposed in the bearing housing, wherein one surface of the bearing has a groove structure 0. Therefore, the fan of the present invention has the same joint size as the prior art, and the pumping and the bearing are// Or the bearing has a small contact area with the bearing housing, reducing the dimensional variation caused by the joint, so that the entire structure is more stable, and the rotating shaft can rotate more smoothly. Moreover, the groove structure of the bearing can further allow air to flow, dissipate heat generated by the fan in operation t, reduce dimensional variation and maintain rotational stability. In addition, the baffle plate connected to the rotating shaft (four) wheel around the joint helps the convection effect of the airflow flowing through the groove structure, greatly reduces the dimensional variation caused by heat, and increases the stability of the rotation. The advantages and spirit of the present invention will be further understood from the following detailed description of the invention. [Embodiment] *Following 2' is a cross-sectional view of a fan 1 according to a first embodiment of the present invention. The fan 1 includes a bearing housing 12, a bearing 14, a rotating shaft 16, an impeller 18, and an electromagnetic element 19. The fan 1 is coupled to a fixed portion 2 of the system (shown in phantom) by a bearing housing 12. The bearing housing 12 is for receiving the bearing 14. The bearing 14 is a ball bearing that includes an inner ring 142, an outer ring 144, and balls 146 disposed therebetween. The outer ring 144 of the bearing 14 is tightly fitted in the bearing housing 12. The shaft 16 is formed with

21707-CP/TW 6 200930898 - The groove structure, which is embodied here, is a circular groove (6). The shaft 16 passes through the inner ring 142 of the bearing 14 and is mated with the inner ring 142. The bearing μ defines two opposing surfaces, 148b, and the annular slot 164 has two portions 164a, 164b that extend beyond the aforementioned surfaces 148a, 148b, respectively. The annular slot 164 allows air to flow through the annular slot 164 to allow the fan t to escape during operation. In addition, the impeller 18 and the rotating shaft end-to-end, the fan further includes a magnetic ring 182, and the electromagnetic field 19 μ magnetic field acts to achieve the purpose of rotation. In the second embodiment of the present invention, the groove structure may be The oblique slit 164, as shown in FIG. 2C, in the third embodiment of the present invention, the groove structure includes one or several spiral slits 164", as shown in FIG. 2C. In the fourth embodiment of the present invention The groove structure includes a plurality of radial slits 164am and longitudinal slits 164b" connecting the radial slits 164a", (the radial and longitudinal directions described herein are relative to the centerline of the rotating shaft (as shown) In the case of the dotted line), as shown in Fig. 2D. Although the radial grooving 164a, "there is no direct communication with the outside air, but through the longitudinal grooving", the connection can also allow the air to flow to the slots 164a " and the longitudinal slots 164b"'. The annular slit 164, the oblique slit 164', and the spiral slit 164" may also be used in combination. Referring to Fig. 3A, a cross-sectional view of the fan 3 according to the fifth embodiment of the present invention is shown. In one embodiment, the groove structure includes a plurality of sections 364a and a plurality of slots 364b, and a perspective enlarged view of the shaft 36 is shown in FIG. 3B. When the impeller 38 rotates, the deflector 384 thereon will The guiding airflow f passes through the section 36 such as between the bearings 34. The path of the airflow f is schematically indicated by the dashed arrow in Fig. 3A. The design of the deflector 384 is shown in Fig. 3C, and is formed in the cup shape of the impeller 38. The inner surface of the hub 381 can help guide the airflow F through the groove structure, so that the heat generated by the fan 3 during operation is dissipated more quickly by the airflow F.

21707-CP/TW 7 200930898 bearing example shows that when the rotating shaft has a groove structure, in addition to reducing the contact area between the rotating shaft and the bearing, thereby reducing the dimensional variation caused by the joint, it can also be under the groove structure of the structure. Enhance the heat dissipation effect and reduce the dimensional variation caused by heat, thereby increasing the service life of the device and its stability of use. The groove structure of the fan of the present invention is not limited to being formed on the rotating shaft, and can also be formed on the bearing, and the effect of reducing the dimensional variation and further adding heat can be achieved. FIG. 4A is a diagram showing a sixth embodiment according to the present invention. The fan has a structure similar to that of the first embodiment described above, and the difference is that the concave riding mechanism is formed on the bearing %, and has a plurality of longitudinal slits 5422 (which are the same as the direction in which the rotating shaft extends) formed in the inner ring 542 of the shaft. The above is a perspective enlarged view as shown in Fig. 4B, thereby reducing the contact area when engaging with the rotating shaft. In addition, the longitudinal slits 5422 extend through the two opposing surfaces 5424 of the bearing %. Thereby, after the rotating shaft is engaged with the bearing 54, the longitudinal slit 5422 can form a passage for the air to pass, and the heat generated when the bearing is operated is dissipated. The path through which the air passes is shown by the arrow in Fig. 4A. Of course, the longitudinal slits 5422 described above may be replaced by spiral or oblique slits 5422, as shown in Figure 4C. The groove structure may of course be the aforementioned slits 5422 and 5422. Further, the inner ring 542 and the outer ring 544 of the bearing may also form a plurality of slits 5422' and 5442' as shown in FIG. 4D, which are shown. The slits 5422, 5442 are spiral-shaped, but the invention is not limited thereto. Since the bearing and the bearing housing of the present invention are also closely matched, the cooperation of the bearing and the bearing housing also has a problem of dimensional variation. Therefore, the plurality of slots are formed in the outer ring of the bearing of the present invention, which can reduce the contact area between the bearing and the bearing housing, thereby reducing the dimensional variation caused by the joint. Further, the effect of the engagement of the bearing and the bearing seat on the bearing and the engagement of the bearing and the rotating shaft is further reduced. Similarly, when the slit 5442 on the outer ring 544 penetrates the two opposite surfaces 5444 of the bearing 54, the cut is also like the slit 5422 on the inner ring 542, and the general heat dissipation effect is not awaited.

21707-CP/TW 8 200930898 STATEMENT Although the foregoing embodiment has been described with a groove structure having two opposite surfaces penetrating the bearing, the invention is not limited thereto. The groove structure of the fan of the present invention also has an edge-shaped groove which reduces the joint area between the rotating shaft and the bearing or the bearing and the bearing seat, thereby reducing the dimensional variation caused by the joint.

In summary, the rotating shaft or the bearing of the present invention has a groove structure, which can reduce the manufacturing area of the rotating shaft and the bearing or the bearing and the bearing seat, and the dimensional variation of the Osaki low joint makes the whole structure more stable, and the rotating shaft can be more For smooth rotation. In addition, the groove structure penetrating the opposite surfaces of the bearing can further allow the air to circulate, and the fan can be easily escaped from the operation towel, thereby reducing the size and cost, and the stability of the movement. In addition, the baffle provided around the joint of the impeller connected to the rotating shaft has the effect of the flow-inducing structure, which causes the dimensional variation and increases the stability of the rotation. The wind is familiar with the details of the above specific concrete compensation, the scale can more clearly describe the invention of the special f, the (four) phase of the above-mentioned good examples to the present, the scope of the 4 is limited to φ, in contrast, The purpose of the invention is to cover all kinds of modifications and equivalents within the scope of the patent scope of the invention. Therefore, the scope of the patent of the invention should be the best according to the above description. So that it covers all possible changes and equal arrangements. [Simplified Schematic] Figure 1 is a cross-sectional view of a conventional fan. Figure 2A is a cross-sectional view of a fan according to a first embodiment of the present invention. Figure 2B is a cross-sectional view of a fan according to a second embodiment of the present invention. Figure 2C is a cross-sectional view of a fan according to a third embodiment of the present invention. Figure 4B is a cross-sectional view of a fan according to a third embodiment of the present invention. Fig. 3A is a cross-sectional view of a fan which is not green according to the fifth embodiment of the present invention.

21707-CP/TW 9 200930898 FIG. 3B is a perspective view showing the rotating shaft of the fan shown in FIG. 3A. 3C is a perspective view of the impeller of the fan shown in FIG. 3A. 4A is a cross-sectional view showing a fan according to a sixth embodiment of the present invention. 4B to 4D are perspective views of various bearing aspects of the fan shown in Fig. 4A. [Main component symbol description] 2: fixing portion 14'34, 54: bearing 18: impeller FI airflow 184, 384: deflector 146: ball 5422 :: longitudinal slit 164a " ', 364b: radial slit 164bm: Longitudinal slot 364a: Section 3: Fan 12: Housing 16, 36: Shaft 19: Electromagnetic elements 142, 542: Inner rings 144, 544: Outer rings 148a, 148b, 5424, 5444: Surface 164: Annular slots 164 ', 164 ": oblique slot 182: magnetic ring 5422', 5442: spiral or oblique slot

21707-CP/TW

Claims (1)

200930898 X. Patent application scope: L A fan comprising: a second! L substructure comprising a bearing seat and a shaft 7 disposed in the bearing housing, wherein a surface of the bearing has a groove structure; And the rotor structure of the rotor is coupled to the stator structure, and includes a rotating shaft, which is the fan of the bearing type, the steel of the first item, wherein the structure comprises a spiral cut slot or its: a radial grooving, a longitudinal grooving, a slanting grooving, a multi-axis shaft, the fan of the first aspect, further comprising an impeller coupled to the rotator, The wheel of the impeller has a plurality of baffles on the inner surface, and the guide plate can guide an airflow through the groove structure when the impeller rotates. 4. One of the fans described in claim 1 Inner ring surface. 5. Apply to the outer ring surface of one of the fans described in item 1 of the patent application. 6. The fan of claim 1 is one of the inner ring surface and one outer ring surface of the bearing. 7. The fan of claim 1, wherein the fan of the scope of claim 7 is a fan of the type described in claim 7 wherein the groove structure is formed in the bearing 'where the groove structure is formed in the bearing' Wherein the groove structure is simultaneously formed in the rotating shaft and has a groove structure. The groove structure of the rotating shaft comprises a longitudinal slot, a longitudinal slot, a diagonal section, an annular slot, a spiral slotted slot or a combination thereof. A bearing structure, comprising: a bearing housing; and a groove structure bearing disposed in the bearing housing, wherein a surface of the bearing has a recess 10. The bearing structure according to claim 9 wherein the The groove structure comprises a 21707-CP/TW 11 200930898 screw hard slot, an annular slot, a radial-polygon groove or a combination thereof. Groove, - longitudinal grooving, - oblique grooving, 11. Formed on the inner ring surface of one of the bearings as described in claim 9 or 1. a bearing structure in which the groove structure is formed in an outer ring surface of one of the bearings. The bearing structure described in claim 9 or 1G, wherein the groove knot _ 13. The pumping described in item 9 or 1 is formed on the surface of the hemp-shock surface and the outer ring. 21707-CP/TW ❹ Ο 12