CN201288703Y - Positioning structure of fan - Google Patents

Abstract

A positioning structure of fan is prepared as setting rotary shaft of fan to make one end of fan be supported against stop portion of base and another end be supported against limit piece of cover body for making fan be clamped between base and cover body for stable rotation.

Description

The positioning structure of the fan

technical field

The utility model relates to a positioning structure, in particular to a positioning structure of a fan.

Background technique

With the advancement of science and technology and the rapid development of electronic related industries, the operating speed of electronic devices such as computers, personal digital assistants (Personal Digital Assistant, PDA) or global positioning system (Global Positioning System, GPS) has been greatly improved, but due to The increase in operating speed relatively increases the heat source generated by the electronic device during operation. If the heat source cannot be effectively released, once the load of the electronic device exceeds the load, the electronic device will be further paralyzed and cannot be used.

In order to solve the problem of heat dissipation of electronic devices, one of the commonly used methods is to install a cooling fan on the heating components of electronic devices (such as electronic components such as chips, central processing units, and integrated circuits), so as to achieve Air flow phenomenon, so that the heating element can maintain its operating efficiency within a certain temperature range. At the same time, in order to consider the manufacturing cost of cooling fans, the type of cooling fans with self-lubricating bearings is generally used at present.

In this self-lubricating bearing cooling fan, the operation of the fan rotor is supported by the rotating shaft pivoted in the oil-impregnated bearing. After the fan is assembled, a C-shaped buckle is fastened to the end of the rotating shaft through the bottom of the sleeve. , to prevent the fan blade from coming out of the bearing under the influence of centrifugal force during operation. At the same time, in order to prevent the fan from rubbing the fan blade shaft seat and the C-shaped buckle at the end of the rotating shaft when the fan is in use, it is necessary to maintain a gap between the upper and lower ends of the bearing. However, the setting of this gap causes the rotating shaft to lose a fixed fulcrum. After a long period of operation, the friction between the rotating shaft and the C-shaped buckle will be too large, which will cause the C-shaped buckle to wear out due to elastic fatigue, and then there is a risk of loosening, which will cause the rotating shaft to be unable to be fixed. When the fan blade rotates, it is very easy to produce problems of vertical movement, deflection, and disturbing noise, which shortens the service life of the cooling fan.

Moreover, if this kind of cooling fan is applied to portable electronic devices such as personal digital assistants (PDAs), since the biggest appeal of portable electronic devices is that it has light and thin and easy to carry characteristics, so with the change of operating environment Different and frequent changes in use status, such as switching the portable electronic device from the horizontal operation direction to the vertical operation direction, or performing a horizontal flip during operation, at this time, the fan blades are caused by the loosening of the C-shaped buckle. Moving up and down will not only make a lot of noise, but what’s more, it will cause the electronic device to vibrate with the movement of the fan, causing considerable trouble for the user in operation, and it is also easy for consumers to believe that this Because of the defect on the product, and then suffer the loss of goodwill.

In addition, the fan frame of the existing cooling fan includes a frame body, a motor base and a plurality of ribs, and the frame body has a plurality of projections, and two ends of the ribs are respectively connected with the motor base and the projections. In order to prevent the bumps from obstructing the flow field of the fan during operation, the area of the bumps is often designed to be only slightly larger than the ribs, which often leads to insufficient connection strength. At the same time, there is another tip on the bump. When the fan is running, the airflow flowing through the bump will be affected by the tip, which will cause the flow field of the airflow to be separated and cause the formation of a vortex. This vortex will not only affect the airflow The wind shear effect will be generated by the flow of the airflow, and the flow of the airflow will generate noise and reduce the heat dissipation efficiency.

Contents of the invention

In view of the above problems, the utility model provides a positioning structure of the fan to improve the C-shaped clasp set on the rotating shaft to stabilize the rotation of the rotating shaft during the operation of the fan. Due to deformation, the rotating shaft moves up and down in the bearing. Move and drive the fan to move in the fan frame, so it can avoid excessive wear of the shaft or bearing, and further prevent the generation of noise.

The utility model discloses a fan positioning structure, which includes a base, a cover and a fan, the base is provided with a stopper; the cover is fastened to the base, and the cover has a A limiting member; the fan is arranged between the base and the cover in a rotatable relationship, and the fan has a rotating shaft, and the rotating shaft passes through the fan; wherein, one end of the rotating shaft abuts against the stopper of the base, The other end leans against the limit piece of the cover, so that the fan is clamped between the base and the cover to rotate.

In addition, the positioning structure of the fan disclosed in the utility model includes a base, a cover and a fan, the base is provided with a stopper; the cover is fastened to the base, and the cover has a Limiting part; the fan is arranged between the base and the cover in a rotatable relationship, and the fan has a holding part and a rotating shaft, and the holding part and the rotating shaft are arranged on two opposite sides of the fan; wherein, the holding part The limit piece leans against the cover, and the other end of the rotating shaft connected to the fan abuts against the stop portion of the base, so that the fan is clamped between the base and the cover to rotate.

The positioning structure of the fan of the present utility model utilizes the rotating shaft or the top holding part arranged on the fan to form a mutually resisting relationship with the limit piece arranged on the cover, so that the fan is clamped between the base and the cover. Therefore, the fan will not move in the same axial direction as the rotating shaft between the base and the cover during operation, thereby preventing the wear between the rotating shaft and the bearing, and effectively solving the problem of the fan between the base and the cover. Noise problems caused by movement between covers.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

Fig. 1 shows the exploded schematic view of the first embodiment of the utility model;

Fig. 2 shows the combined schematic view of the first embodiment of the utility model;

Figure 3 is a schematic cross-sectional view of the first embodiment of the utility model;

Figure 4 is a schematic diagram of the operation of the first embodiment of the utility model;

Fig. 5 shows the exploded schematic view of the second embodiment of the utility model;

Figure 6 is a schematic cross-sectional view of a second embodiment of the present invention; and

FIG. 7 is a combined schematic view of the third embodiment of the present invention.

Among them, reference signs

10 base

11 Accommodating space

12 stop part

13 Bearings

131 shaft hole

14 Stator

141 opening

15 buckle sections

16 socket

17 side wall

18 circulation port

20 cover body

21 Limiting parts

211 bump

22 connecting rib

23 buckle section

24 Inserts

25 frame

30 fan

31 Rotation axis

32 rotor

321 perforation

322 Top holding part

323 Groove

Detailed ways

The positioning structure of the fan disclosed by the utility model is suitable for heat dissipation structures of electronic devices such as display card chipsets, memory modules, mobile phones, personal digital assistants, and hard disk digital cameras. limit.

Please refer to FIG. 1 which is an exploded schematic view of the first embodiment of the present invention. The fan positioning structure according to the first embodiment of the present invention includes a base 10 , a cover 20 and a fan 30 . The base 10 has an accommodating space 11, and one end of the base 10 is provided with a stopper 12, a bearing 13 and a stator 14, the bearing 13 is located above the stopper 12 and has a shaft hole 131, so that the stopper 12 Part of it is exposed in the shaft hole 131. The stator 14 has an opening 141, and the opening 141 is sleeved on the bearing 13. At the same time, the base 10 is provided with a plurality of buckle sections 15 and a plurality of snap sections 15 on the other side of the accommodating space 11. A socket 16; the cover 20 has a limiter 21, a connecting rib 22 and a frame 25, the position of the limiter 21 corresponds to the stopper 12 of the base 10, and is connected with the frame 25 by the connecting rib 22 , the connecting rib 22 is arranged in a wave shape, and the side edge of the cover body 20 is provided with a plurality of buckle sections 23 and inserts 24, and the buckle sections 23 and inserts 24 correspond to the buckle sections 15 of the base 10 respectively and the slot 16 ; the fan 30 has a rotating shaft 31 and a rotor 32 , and the rotor 32 has a through hole 321 , so that the rotating shaft 31 passes through the through hole 321 in the rotor 32 . Wherein, the stator 14 and the rotor 32 belong to the conventional existing technology, and do not belong to the technical features of the present utility model, so the detailed structural composition thereof will not be repeated.

Fig. 2 and Fig. 3 show the combination and cross-sectional schematic diagrams of the first embodiment of the present utility model. According to the first embodiment of the present utility model, one end of the rotating shaft 31 of the fan 30 is passed through the shaft hole 131 of the bearing 13, and is abutted against the stop portion 12 of the base 10, so that the rotor 32 of the fan 30 is located on the base Above the stator 14 of the base 10 , the fan 30 can rotate in the accommodating space 11 of the base 10 . Then, the buckle section 23 and the insert 24 arranged on the edge of the cover body 20 are correspondingly buckled on the buckle section 15 of the base 10 and embedded in the slot 16 of the base 10, so that the cover body 20 is firmly buckled on the In the base 10 , at this time, the limiting member 21 on the cover 20 is in contact with the other end of the rotating shaft 31 of the fan 30 opposite to the stop portion 12 . Make one end of the rotating shaft 31 abut against the stopper 12 of the base 10 , and the other end abut against the stopper 21 of the cover 20 , so that the fan 30 is clamped between the base 10 and the cover 20 in the accommodating space 11 The fan 30 will not move in the same axial direction as the rotating shaft 31 between the base 10 and the cover 20 as the fan 30 rotates.

At the same time, if the positioning structure of the fan in the first embodiment of the present utility model is turned over, taking horizontal turning as an example, as shown in Figure 4, since the fan 30 is clamped between the base 10 and the cover by the rotating shaft 31 20, therefore, the fan 30 can maintain the relative position between the cover 20 and the base 10 according to the different turning angles, effectively preventing the fan 30 from being generated on the cover 20 and the base 10 due to the different turning angles. The case of axial movement between.

In addition, please refer to Fig. 1 and Fig. 2 again, the connecting rib 22 on the cover body 20 is arranged in a wave shape, and is connected between the limiting member 21 and the frame 25, when the fan 30 rotates and drives the surrounding air to generate a Enter the accommodating space 11 from the base 10, and discharge from the cover 20 to the vertical flow direction outside the accommodating space 11. When the air flow is discharged from the cover 20, it is linearly guided by the wave-shaped connecting ribs 22, so that The exhausted airflow will not cause airflow disturbance between the fan 30 and the cover 20 or on the outer surface of the cover 20 relative to the base 10, and provide a smooth aerodynamics, thereby effectively reducing the formation of turbulent flow and wind shear noise .

Please refer to FIG. 5 and FIG. 6 , which are the exploded and cross-sectional diagrams of the second embodiment of the present invention. The structure of the second embodiment of the utility model is substantially the same as that of the first embodiment, and only the differences between the two embodiments will be described below. According to the positioning structure of the fan according to the second embodiment of the present invention, the fan 30 has a holding portion 322, a groove 323, a rotating shaft 31 and a rotor 32, and the holding portion 322 and the groove 323 are arranged on the rotor 32 One end of the rotating shaft 31 passes through the groove 323 on two opposite sides of each other. The fan 30 leans against the stopper 21 of the cover body 20 by the supporting portion 322 , and the other end of the rotating shaft 31 is passed through the shaft hole 131 of the bearing 13 relative to the groove 323 , and is abutted against the base. The stop portion 12 of 10 makes the fan 30 clamped between the base 10 and the cover 20 for rotation, and prevents the fan 30 from reciprocating in the axial direction between the base 10 and the cover 20 .

As shown in FIG. 7 , it is a combined schematic view of the third embodiment of the present invention. The structure of the third embodiment of the utility model is substantially the same as that of the second embodiment, and only the differences between the two embodiments will be described below. According to the positioning structure of the fan disclosed in the third embodiment of the present utility model, the accommodating space 11 is arranged on the cover body 20, and a flow opening 18 communicating with the outside is provided on the side wall 17 of the accommodating space 11 , and the limiting member 21 of the cover 20 has a protrusion 211 , and the protrusion 211 is disposed on a side of the limiting member 21 opposite to the fan 30 . When the cover 20 is fastened to the base 10 , the cover 20 is pressed against each other by the protrusion 211 on the stopper 21 and the supporting portion 322 of the fan 30 , so that the fan 30 is clamped between the base 10 and the cover 20 between. Among them, in the first and second embodiments, when the fan 30 rotates, the surrounding air is driven to generate a flow in the vertical direction of the airflow that enters the accommodating space 11 from the base 10 and is discharged from the cover 20 outside the accommodating space 11. According to this In the third embodiment of the utility model, the air flow direction when the fan 30 rotates is a horizontal flow direction that enters the accommodating space 11 from the cover 20 and is discharged out of the accommodating space 11 through the flow opening 18 .

Therefore, the positioning structure of the fan disclosed in the present invention can be applied to fans in which the airflow flows in the vertical direction and in the horizontal direction at the same time.

The positioning structure of the fan disclosed in the utility model utilizes the rotating shaft arranged on the fan, or the combination of the rotating shaft and the supporting part, so that the two ends of the fan respectively abut against the stop part of the base and the part against the cover. Limiting parts, so that the fan is clamped between the base and the cover to rotate, so it is not necessary to use the C-shaped buckle to prevent the fan from reciprocating in the same axial direction as the rotation axis between the base and the cover , and reduce the wear between the rotating shaft and the bearing, so that the rotating shaft can rotate stably in the bearing, thereby solving the problem of noise generated by the fan when rotating.

At the same time, the wave-shaped connecting ribs provided on the cover provide a smooth aerodynamics when the fan is running, which can effectively reduce the turbulence of the air flow and the formation of wind shear noise.

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (10)

1. A fan positioning structure, characterized in that it comprises: a base with a stopper; a cover body, fastened to the base, and the cover body has a limiter relative to the stopper; and a fan, rotatably arranged between the base and the cover, the fan has a rotating shaft, and the rotating shaft passes through the fan; Wherein, one end of the rotating shaft abuts against the stop portion, and the other end abuts against the limiting member, so that the fan is clamped between the base and the cover to rotate. 2. The positioning structure of the fan according to claim 1, wherein the limiting member has a protrusion, and the protrusion is arranged on a side of the limiting member opposite to the fan, and abuts against the fan. the axis of rotation. 3. The fan positioning structure according to claim 1, wherein the cover further comprises a frame and a connecting rib, the frame is fastened to the base, and the connecting rib connects the frame and the limiting member. 4. The fan positioning structure according to claim 3, wherein the connecting rib is in a wave shape. 5. The positioning structure of the fan according to claim 1, wherein the base further comprises a bearing and a stator, the bearing is arranged at the end of the base where the stopper is provided, and the stator is sleeved on the bearing , and the fan also has a rotor, which cooperates with the stator to generate electric interaction. 6. A fan positioning structure, characterized in that it comprises: a base with a stopper; a cover body, fastened to the base, and the cover body has a limiter relative to the stopper; and A fan, rotatably arranged between the base and the cover, the fan has a holding portion and a rotating shaft, and the holding portion and the rotating shaft are arranged on two opposite sides of the fan; Wherein, the supporting portion leans against the limiting member, and the other end of the rotating shaft connected to the fan abuts against the stopper portion, so that the fan is clamped between the base and the cover to rotate. 7. The positioning structure of the fan according to claim 6, wherein the limiting member has a protrusion, and the protrusion is arranged on the side of the limiting member opposite to the fan, and abuts against the fan. The top holder. 8. The fan positioning structure according to claim 6, wherein the cover further comprises a frame and a connecting rib, the frame is fastened to the base, and the connecting rib connects the frame and the limiting member. 9. The fan positioning structure according to claim 8, wherein the connecting rib is in a wave shape. 10. The positioning structure of the fan according to claim 6, wherein the base further comprises a bearing and a stator, the bearing is arranged at one end of the base where the stopper is provided, and the stator is sleeved on the bearing , and the fan also has a rotor, which cooperates with the stator to generate electric interaction.

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