US20070048125A1

US20070048125A1 - Rotary structure of a heat dissipating fan

Info

Publication number: US20070048125A1
Application number: US11/213,929
Authority: US
Inventors: Chin-Wen Chou
Original assignee: Zippy Technology Corp
Current assignee: Zippy Technology Corp
Priority date: 2005-08-30
Filing date: 2005-08-30
Publication date: 2007-03-01

Abstract

The invention discloses a rotary structure of a heat dissipating fan capable of maintaining the operation of an axle of the heat dissipating fan along a single axial line by means of a base of the heat dissipating fan and two fixing members disposed at two contact ends of the axle of the heat dissipating fan, so that the axle will not be deviated or collided to produce abnormal noises when the heat dissipating fan is operated.

Description

FIELD OF THE INVENTION

The present invention relates to a rotary structure of a heat dissipating fan, and more particularly to a rotary structure that maintains the operation of a heat dissipating fan along a single axial line to reduce abnormal noises.

BACKGROUND OF THE INVENTION

The present fans for making airflows or achieving a heat dissipation effect are divided into many types according to the using environments and their applications. As the science and technology advances, the information and communication industries are developed in a fast pace, such that the usage of a heat dissipating fan for precision electronic technological products is increased. The heat dissipating fan for high-power and high-speed precision electronic technological products comes with a small size in order to work with the electronic products, and the heat dissipating fan produces airflow to solve a high temperature produced by high power and dissipate the heat to maintain the operation at a specific temperature. If it is unable to effectively dissipate the heat produced by the operation of the product, then the related components of the product may be overheated and damaged by the excessively high temperature, or more seriously a fire accident may occur. Therefore, a vast majority of precision electronic and technological products come with a fan to achieve the heat dissipating effect.
An improved structure of a prior art heat dissipating fan includes a vane radially extended from a heat dissipating fan, and a base having a rotary space for accommodating the heat dissipating fan, and the base installs a circuit board and a coil for introducing electric power to drive the heat dissipating fan to rotate, and the heat dissipating fan includes an axle disposed at its center and a bearing disposed on the base corresponding to the axle. As to the current technology, the volume of installing the heat dissipating fan is limited, and thus the performance of the heat dissipating fan mainly depends on the rotary speed of the heat dissipating fan. However, the axle and the bearing will produce high heat due to excessive frictions produced by high-speed rotations, and the axle will be deviated easily to collide with the bearing and produce abnormal noises. Therefore a durable wearing-resisting ceramic bearing is developed, but the ceramic bearing has a high hardness, and thus it is very difficult to be fixed or designed. Furthermore, the high heat issue produced by the friction still cannot be avoided effectively.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to overcome the foregoing shortcomings and avoid the existing deficiencies by providing a rotary structure of a heat dissipating fan capable of maintaining the operation of an axle of the heat dissipating fan along a single axial line by means of a base of the heat dissipating fan and two fixing members disposed at two contact ends of the axle of the heat dissipating fan, so that the axle will not be deviated or collided to produce abnormal noises when the heat dissipating fan is operated.
Another objective of the present invention is to provide a rotary structure of a heat dissipating fan that comprises a contact end of the axle having an external diameter smaller than the axle to reduce the contact area and friction between the axle and the fixing member, and thus avoiding the high heat produced by frictions.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
FIGS. 4, 5, and 6 are cross-sectional views of equivalent embodiments of the present invention; and
FIG. 7 is an exploded view of another preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The technical contents of the present invention will now be described in more detail hereinafter with reference to the accompanying drawings that show various embodiments of the invention.
Referring to FIGS. 1 and 2 for the perspective view and the exploded view of the present invention, a rotary structure of a heat dissipating fan 1 comprises a heat dissipating fan 1, and the heat dissipating fan 1 comprises a main body 10 and a plurality of vanes 11 radially extended from the main body 10 and an axle 12 a having a contact end 121 separately disposed on both sides of the main body 10, and the heat dissipating fan 1 is accommodated in a base 2, and the base 2 includes a rotary space for the rotation of the heat dissipating fan 1, and the rotary space installs a driving mechanism for driving the heat dissipating fan 1 to rotate (as shown in the figure, and the driving mechanism comprises a coil 21 and a circuit board 22 for receiving electric power and converting electric power into magnetic force to drive the heat dissipating fan 1 to rotate, but the driving mechanism is a prior art and thus will not be described here). Two fixing members 32 disposed on two contact ends 121 of the base 2 corresponding to the axle 12 a are provided for maintaining the rotation of the axle 12 a along a single axial line. The foregoing fixing members 32 comprise two fixing frames 33 coupled to the base 2 and a bearing 34 disposed on the fixing frame 33 and coupled to the contact end 121. In the first preferred embodiment, the fixing frame 33 is integrally coupled to the disposing member 30 and the lid 31 of the base 2, or the base 2 includes a fixing section 35 for separating and connecting the fixing frame 33 as shown in FIG. 7.
Referring to FIG. 3 for the cross-sectional view of the present invention, the axle 12 a of the heat dissipating fan 1 is fixed by both ends of the bearing 34 of the fixing member 32, and thus the heat dissipating fan 1 will not be separated from the bearing 34 during its rotation and will maintain the rotation along an axial line, so as to effectively avoid the axle 12 a from being deviated or collided to produce abnormal noises. Furthermore, the present invention can design the external diameter of the contact end 121 to be smaller than the external diameter of the axle 12 a, and the bearing 34 has a rotary groove 36 with a size equal to the external diameter of the contact end 121, and the contact end 121 is tapered from the external diameter of the axle 12 a. The shapes of the contact end 121 and the rotary groove 36 are shown in FIG. 3, and the tip of the contact end 121 is the vertex of a triangular cone, or the tip of the contact end 121 of the axle 12 b is an arc of a cone as shown in FIG. 4, or the contact end 121 is simply in a cylindrical shape and has an external diameter smaller than the external diameter of the axle 12 c as shown in FIG. 5. In addition, the present invention also can exchange the contact end 121 of the axle 12 c with the rotary groove 36 of the bearing 34 as shown in FIG. 6, and the contact end 121 is sunk from an end of the axle 12 d, and the bearing 34 extends a braking section 38 from the internal end points 37 of the contact end 121, and the braking section 38 has an identical shape as the contact end 121.
Regardless of the preferred embodiments, different materials can be selected to make the high-speed heat dissipating fan (such as the bearing 34 is made of a durable ceramic material) to reduce the high heat so produced.
While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.

Claims

1. A rotary structure of a heat dissipating fan, comprising:

a heat dissipating fan, comprising a main body and a plurality of vanes radially extended from said main body, and said main body including an axle having a contact end separately disposed on both sides of said main body; and

a base, having a rotary space for accommodating said heat dissipating fan, and said rotary space installing a driving mechanism for driving said heat dissipating fan to rotate, and said base comprising two fixing members disposed at two contact ends corresponding to said axle for maintaining the rotation of said axle along a single axial line.

2. The rotary structure of a heat dissipating fan of claim 1, wherein said fixing member comprises two fixing frames coupled with said base and a bearing disposed on said fixing frame and coupled to said contact end.

3. The rotary structure of a heat dissipating fan of claim 2, wherein said fixing frame is integrally coupled to said base.

4. The rotary structure of a heat dissipating fan of claim 3, wherein said base comprises a disposing member and a lid, and said fixing frame is respectively and integrally coupled with said disposing member and said lid.

5. The rotary structure of a heat dissipating fan of claim 2, wherein said base comprises a fixing section for coupling to said fixing frame.

6. The rotary structure of a heat dissipating fan of claim 2, wherein said contact end has an external diameter smaller than the external diameter of said axle, and said bearing includes a rotary groove having an external diameter equal to the external diameter of said contact end.

7. The rotary structure of a heat dissipating fan of claim 6, wherein said contact end is tapered from the external diameter of said axle.

8. The rotary structure of a heat dissipating fan of claim 1, wherein said contact end has an external diameter smaller than the external diameter of said axle.

9. The rotary structure of a heat dissipating fan of claim 8, wherein said contact end is tapered from the external diameter of said axle.

10. The rotary structure of a heat dissipating fan of claim 1, wherein said contact end is sunk from an end of said axle, and said bearing includes a braking section extended towards said contact end.

11. The rotary structure of a heat dissipating fan of claim 10, wherein said braking section and said contact end have an identical shape.