TWI384730B - Motor, cooling fan and the stator thereof - Google Patents

Description

Motor, cooling fan and stator device thereof

The present invention relates to a motor, a heat dissipating fan and a stator device thereof, and more particularly to a motor, a heat dissipating fan or a stator thereof that can be easily assembled.

Referring to FIG. 1, the conventional motor 9 includes a housing 91, a rotor 92 and a fixed subset 93. The central portion of the housing 91 has a hollow shaft tube 911. The shaft 911 can be internally provided with a bearing 96, a buckle 94 and an oil reservoir 95. The rotor 92 has a rotating shaft 921 at the center. The shaft 921 is rotatably pivotally connected to the bearing 96, and the outer peripheral surface of the rotating shaft 921 forms a latching groove 922, and the latching groove 922 is adjacent to the bottom of the rotating shaft 921 for the buckle 94 to be snap-fitted. The stator assembly 93 is mounted on the outer circumferential surface of the shaft tube 911 to drive the rotor 92 to rotate.

In general, when the rotating shaft 921 of the rotor 92 of the conventional motor is rotated about the bearing 96, the lubricating fluid will be pulled out from the rotating shaft 921 and the bearing 96, so that the lubricating fluid will gradually be lost. Further, the lubricating fluid is depleted, and when the rotating shaft 921 is unable to obtain lubrication, noise and abrasion are generated when the rotor 92 of the conventional motor continues to rotate. In addition, dust in the air may also accumulate on the top surface of the bearing 96, and adversely affect the rotating shaft 921 and the bearing 96.

Moreover, the conventional motor usually holds the buckle 94 in the latching slot 922 of the rotating shaft 921 to utilize the bearing 96 and the retaining ring 94. The blocking action between the two prevents the rotor 92 from being inadvertently released during the rotation. However, since the bottom of the rotating shaft 921 of the conventional motor must be reserved for a length (L) in advance, the latching groove 922 can be formed to engage the retaining ring 94, thereby causing the rotating shaft 921 to approach the outer periphery of the bottom. The surface cannot be rotatably coupled with the bearing 96. In other words, since the bottom of the rotating shaft 921 has the latching groove 922, the joint area between the rotating shaft 921 and the bearing 96 is further restricted, thereby causing the The rotational stability of the rotor 92 cannot be further improved, especially for a micro-small conventional motor, which is more likely to be caused under the condition that the joint area between the rotating shaft 921 and the bearing 96 is limited. The rotational stability of the rotor 92 is not good.

Moreover, since the conventional motor has a function of preventing the rotor 92 from coming loose, it must be coupled to the latching groove 922 of the rotating shaft 921 by means of the retaining ring 94. Therefore, when the conventional motor is assembled, the rotor is The rotating shaft 921 of 92, the bearing 96 and the relevant member of the retaining ring 94 must be coupled in the shaft tube 911, so it is difficult to further confirm whether the components in the shaft tube 911 are actually combined with each other, resulting in difficulty in grasping Knowing the assembly quality of the motor, it also causes poor assembly convenience.

The object of the present invention is to improve the above-mentioned disadvantages, and to provide a stator device which is provided with a limiting member by a certain sub-group, and the limiting member passes through a groove provided by the shaft tube of the housing and protrudes from the shaft The inside of the tube prevents the bearing from coming loose, so that the present invention has the effect of assembly convenience.

A second object of the present invention is to provide a motor using the stator set A limiting member is disposed, and the limiting member passes through a groove provided by the shaft tube of the housing and protrudes inside the shaft tube to prevent the bearing and the rotor from loosening, so that the invention has improved rotation stability And the convenience of assembly.

A further object of the present invention is to provide a motor and a stator device thereof. The shaft tube of the stator assembly is provided with an abutting plate, and the limiting member is pressed on the abutting plate to prevent the bearing and the rotor from being loosened. The motor of the present invention has the effect of better positioning effect.

Another object of the present invention is to provide a motor and a stator device thereof, which are provided with an abutment plate in a shaft tube of the stator assembly, so that the present invention has a better effect of preventing lubricating oil leakage.

Another object of the present invention is to provide a motor and a stator device thereof, wherein an abutment plate is disposed in a shaft tube of the stator assembly, so that the present invention has a better effect of preventing dust from accumulating on the top surface of the bearing.

Another object of the present invention is to provide a motor and a stator device thereof. The shaft tube of the stator assembly is provided with an abutting plate, and the limiting member is pressed on the abutting plate to prevent the abutting plate from being in the shaft tube. The horizontal direction is moved, thereby preventing the rotation axis of the rotor from rotating, and the friction plate and the noise effect are generated by the contact plate contacting the rotating shaft.

Another object of the present invention is to provide a heat dissipating fan having a housing of the stator device extending from an outer frame with a connecting member, and a plurality of moving blades on the outer peripheral surface of the hub of the rotor to form a fan wheel. The fan will have the efficacy of each of the above-mentioned stator devices and achieve the best heat dissipation effect.

The stator device according to the invention comprises a housing and a certain subset. The shaft seat is provided with a shaft tube, and the shaft tube is built into a bearing. The top end of the shaft tube has at least one groove, and the groove is formed by the top of the shaft tube. The stator assembly has an axially extending assembly hole, and the assembly hole is sleeved on the outer circumferential surface of the shaft tube, and the stator assembly has at least one limiting member passing through the groove of the shaft tube and protruding from the shaft tube The inside is to limit the looseness of the bearing. Thereby, the assembly convenience of the stator is effectively improved.

A motor according to the invention comprises a housing, a rotor and a subset. a shaft tube is disposed in the center of the housing, the shaft tube is built into a bearing, and the top end of the shaft tube has at least one groove, the groove is formed by a downward gap of the top of the shaft tube; a rotating shaft is arranged in the center of the shaft. The rotating shaft is pivotally connected to the bearing; the stator assembly has an axially extending assembly hole, and the assembly hole is sleeved on the outer circumferential surface of the shaft tube, and the stator assembly has at least one limiting member from the groove of the shaft tube Pass and protrude inside the shaft tube to limit the looseness of the bearing. Thereby, the assembly convenience and rotational stability of the motor are effectively improved.

According to the motor of the present invention, the housing further extends to form an outer frame by using a plurality of connecting members, the outer frame has an air inlet side and an air outlet side, and a plurality of buckets are disposed on the outer circumferential surface of the hub of the rotor. The stator device can form a heat dissipation fan.

The above and other objects, features and advantages of the present invention will become more <RTIgt; The motor of the first embodiment of the present invention mainly comprises a certain sub-device and a rotor, wherein the stator device comprises a housing 10 and a certain sub-group 20, and the rotor 30 is pivotally connected to the stator device for rotation. among them: A shaft tube 11 is disposed in the center of the housing 10. The bottom of the shaft tube 11 is preferably formed in a closed shape, and a bearing 12, an abutting plate 13 and a supporting member 14 are disposed in the shaft tube 11. .

The top of the shaft tube 11 is provided with at least one groove 111. In the embodiment, the top of the shaft tube 11 is provided with two grooves 111, which can be downward from the top of the shaft tube 11. The notch, the groove has a horizontal width (in terms of the drawing); the outer peripheral wall of the shaft tube 11 is formed with a positioning portion 112 in the radial direction, and the positioning portion 112 can be as shown by the size Poor composition.

The bearing 12 can be a conventional ball bearing or a self-lubricating bearing. In the present embodiment, the bearing 12 is a self-lubricating bearing.

The shape of the abutting plate 13 matches the sectional shape of the shaft tube 11. In the present embodiment, the shape is preferably circular, and the outer diameter of the abutting plate 13 is approximately equal to the inner diameter of the shaft tube 11, thus, When the abutting plate 13 is positioned at the top of the bearing 12, the abutting plate 13 has a function of preventing the lubricating oil from escaping and preventing the dust from accumulating on the top of the bearing 12. The abutting plate 13 has a through hole 131 extending in the axial direction. The inner periphery of the through hole 131 preferably has a plurality of slits 132 formed in the radial direction, so that the abutting plate 13 located at the inner periphery of the through hole 131 has deformation elasticity. Therefore, the abutting plate 13 can pass through the through hole 131 for the rotating shaft 32 of the rotor 30.

The metal coil of the stator assembly 20 can be a conventional axial winding manner or a radial winding manner. An axially extending assembly hole 21 is formed in the center of the stator assembly 20, so that the stator assembly 20 can be assembled by the assembly. The hole 21 is sleeved on the outer peripheral wall of the shaft tube 11, and the stator portion 20 is fixed at a predetermined position by the position portion 112 of the outer peripheral wall of the shaft tube 11. The stator set 20 The assembly hole 21 and the shaft tube 11 can also be fixed by a tight fitting manner, an adhesive manner or other suitable manner to further ensure the assembly stability between the stator assembly 20 and the shaft tube 11. In this embodiment, the winding group of the stator assembly 20 is a radial winding group. The stator assembly 20 mainly includes an assembly hole 21, an upper insulating sleeve 22, a lower insulating sleeve 23, a silicon steel sheet 24, and a metal coil. And the at least one limiting member 26, wherein the upper insulating sleeve 22 and the lower insulating sleeve 23 are wrapped around the silicon steel sheet 24, and the metal coil 25 is wound around the upper insulating sleeve 22 and the lower insulating sleeve 23 to form the stator assembly. 20. The at least one limiting member 26 protrudes from the assembly hole 21 of the stator assembly 20. In the embodiment, the limiting member 26 is two and protrudes from the upper insulating sleeve 22 toward the assembly hole 21; when the stator When the set 20 is set in the shaft tube 11 of the housing 10, the end of the second limiting member 26 passes through the two grooves 111 of the shaft tube 11 and protrudes inside the shaft tube 11, in the preferred embodiment. The limiting member 26 is formed with the groove 111, and the horizontal width of the limiting member 26 is not greater than the lateral width of the groove 111. Thus, the stator group 20 can be restricted from being on the axis. The tube 11 acts as a relative rotation. The terminal end of the limiting member 26 protrudes from the inner wall of the shaft tube 11 and is pressed on the top of the bearing 12 or the abutting plate 13 to prevent the rotor 30 and the bearing 12 from being loosened from the shaft tube 11. Details).

The rotor 30 includes a hub 31, a rotating shaft 32, a ring magnet 33, and a coupling seat 34. One end of the rotating shaft 32 is coupled to the coupling seat 34 at the inner central portion of the hub 31, and the other end forms a free end and extends through the abutting plate 13, the bearing 12 and abuts the supporting member 14 so that the rotor 30 can be The bearing 12 is rotated about the housing 10 to actuate. In addition, the outer peripheral surface of the rotating shaft 32 forms a reducing portion to utilize the reducing portion A ring groove 321 is formed, the ring groove 321 is away from the bottom end of the rotating shaft 32, and the ring groove 321 can also be used for the inner edge of the through hole 131 provided in the abutting plate 13 to be caught in the ring groove 321 so as to rotate. The shaft 32 can also be constrained to the positioning by the abutment plate 13 (described in detail later). The outer peripheral surface of the rotating shaft 32 adjacent to the bottom end can also be used for pivotal connection with the bearing 12, thereby improving the rotational stability of the rotor 30.

Referring to Figures 3 and 4, the top support member 14, the bearing 12 and the abutment plate 13 are sequentially placed in the shaft tube 11, and the stator assembly 20 is sleeved on the shaft by the assembly hole 21. The outer peripheral wall of the tube 11 and the position portion 112 of the outer peripheral wall of the shaft tube 11 are used to fix the stator assembly 20 at a predetermined position. At this time, the limiting member 26 of the stator assembly 20 is positioned with the groove 111 of the shaft tube 11, and the terminal end of the limiting member 26 is also protruded toward the inner wall of the shaft tube 11 and pressed at the abutment. Board 13. Since the stator assembly 20 has been fixed to the outer wall of the shaft tube 11 by various preferred fixing methods, the limiting member 26 and the abutting plate 13 can effectively prevent the rotor 30 and the bearing 12 from loosening from the shaft tube 11. Further, since the limiting member 26 is positioned in a phase with the groove 111 of the shaft tube 11, the limiting member 26 can also securely and securely fix the abutting plate 13 to the bearing 12. The top portion prevents the abutting plate 13 from moving horizontally in the shaft tube 11, thereby preventing friction and noise from coming into contact with the rotating shaft 32 when the rotating shaft 32 of the rotor 30 is rotated.

When the free end of the rotating shaft 32 of the rotor 30 sequentially penetrates the abutting plate 13 and the bearing 12 of the assembled stator device and abuts against the supporting member 14, the through hole 131 of the abutting plate 13 is inside. The edge is further buckled in the annular groove 321 of the rotating shaft 32, whereby the limiting member 26 and the abutting plate 13 can surely limit the The bearing 12 and the rotor 30 prevent the bearing 12 and the rotor 30 from coming loose from the shaft tube 11.

Moreover, when the stator assembly 20 is sleeved on the outer peripheral wall of the shaft tube 11, the positioning portion 112 of the shaft tube 11 can provide an axial positioning function of the stator assembly 20 to effectively avoid the assembly position of the stator assembly 20. The upper or lower portion of the rotating shaft 32 is clamped to the ring plate 321 of the rotating shaft 32. Therefore, the stator device of the present invention can be designed by the positioning portion 112 of the shaft tube 11 to ensure that the limiting member 26 can fully exert its function and can improve the assembly convenience of the stator assembly 20.

In the present embodiment, when the rotating shaft 32 of the rotor 30 is pivotally connected to the bearing 12 of the stator device, since the top of the shaft tube 11 is formed with the groove 111 for the limiting member 26 of the stator assembly 20 to be stuck, The shaft tube 11 is formed with a protective wall of a suitable height, and the top of the shaft tube 11 forming the protective wall can also provide the coupling seat 34 of the rotor 30 to extend for optimal dustproofing and preventing lubricating oil leakage.

Referring to Figures 5 and 6, there is shown a stator apparatus or motor according to a second embodiment of the present invention, the stator apparatus or motor comprising a housing 10, a sub-set 20 and a rotor which are identical to the first embodiment. 30. I will not repeat them here. In the present embodiment, the abutting plate 17 also has a through hole 171 extending in the axial direction. The inner periphery of the through hole 171 preferably has a plurality of slits 172 formed in the radial direction so as to be located on the inner periphery of the through hole 171. The abutment plate 17 has a deformation elasticity so that the abutment plate 17 can pass the rotation shaft 32 of the rotor 30 through the through hole 171. Further, the abutment plate 17 is provided with at least one radially protruding lug. 173, the lateral maximum of the at least one lug 173 The width is not greater than the lateral width of the groove 111, and the radial length of the at least one lug 173 is preferably not more than the outer diameter of the shaft tube 11. In the present embodiment, the lugs 173 are two recesses 111 that can be clamped on the shaft tube 11, so that the abutment plate 17 and the shaft tube 11 have a better positioning effect. In addition, one or more washers 18 may be disposed between the abutting plate 17 and the bearing 12 to make the abutting plate 17 in indirect contact with the bearing 12. Of course, a plurality of washers 18 are placed on the abutting plate 17 . It also has the same effect as the bearing 12.

Referring to FIG. 7, when the stator device of the preferred embodiment of the present invention is used in a heat dissipating fan, the housing 10 of the first or second embodiment is extended by a plurality of connecting members 15 to a frame. The plurality of connecting members 15 may be ribs or vanes; the outer frame 16 has an air inlet side 161 and an air outlet side 162, and the outer peripheral surface of the hub 31 is provided with a plurality of moving blades 35 to form a fan wheel. Therefore, when the rotor 30 rotates, the plurality of buckets 35 can drive the airflow to flow from the inlet side 161 to the outlet side 162, and the supercharging effect is achieved by the connecting member 15.

As described above, with the design of the limiting member 26 of the motor of the present invention, in addition to effectively preventing the rotor 30 from being loosened, the limiting member 26 is engaged with the groove 111 of the shaft tube 11, and the stator assembly 20 can be further provided. A positioning function is adopted to prevent the stator assembly 20 from rotating relative to the shaft tube 11 of the housing 10, so that the combination of the stator assembly 20 and the housing 10 can achieve a better positioning effect.

In the case of the motor of the present invention, when the positioning portion 112 is provided on the outer circumferential surface of the shaft tube 11 of the housing 10, when the stator assembly 20 is assembled to the housing 10, the bearing 12 can be appropriately crimped by the limiting member 26. To avoid the stator set 20 The assembly position is too high to cause the bearing 12 or the rotor 30 to loosen. Thereby, the motor of the present invention can further enhance the assembly convenience of the stator assembly 20 and the like.

In the motor of the present invention, when the groove 111 is disposed on the top of the shaft tube 11 of the housing 10 and the limiting member 26 is engaged, the top of the shaft tube 11 protrudes from the bearing 12 by an appropriate height. The protruding appropriate height of the shaft tube 11 just forms a ring of protective walls. Thus, the shaft tube 11 forming the protective wall can be used to prevent the lubricating oil from escaping, leaking, and preventing dust from entering and accumulating on the top of the bearing 12.

In the case of the motor of the present invention, in the case where the abutting plates 13 and 17 are provided on the inner circumferential surface of the shaft tube 11 of the housing 10, the abutting plates 13, 17 may be provided with a ring groove provided with the rotating shaft 32 of the rotor 30. The 321 phase buckle is used to prevent the bearing 12 and the rotor 30 from being loosened. The abutting plates 13 and 17 can also have a rotating shaft formed by preventing the lubricating oil from escaping and leaking, thereby preventing the lubricating oil from leaking. Frictional noise and wear and tear between 32 and bearing 12.

The motor of the present invention is provided with a lug 173 by the abutting plate 17, and the lug 173 is engaged with the groove 111 of the shaft tube 11 to provide a positioning function of the abutting plate 17 to avoid the abutment. The connecting plate 17 relatively moves the shaft tube 11 of the housing 10 so that the abutting plate 17 can achieve a better positioning effect.

In the motor of the present invention, in the case where the abutting plates 13 and 17 are provided on the inner circumferential surface of the shaft tube 11 of the housing 10, the abutting plates 13, 17 can also prevent dust from accumulating on the top of the bearing 12 and the like.

In the motor of the present invention, the washer 18 is provided between the abutting plate 17 and the bearing 12, so that the abutting plate 17 can be in indirect contact with the bearing 12.

In the motor of the present invention, when the groove 111 is disposed on the top of the shaft tube 11 of the housing 10 and the limiting member 26 is engaged, the top of the shaft tube 11 protrudes from the bearing 12 by an appropriate height. The shaft tube 11 protruding at a suitable height can also provide the coupling seat 34 of the rotor 30 to extend. Thus, the stator device of the present invention can further prevent the lubricating oil from escaping and leaking, and prevent dust from accumulating in the bearing. 12 top and other effects.

In the motor of the present invention, when the housing 10 is extended by the connecting member 15 to the outer frame 16, and the outer peripheral surface of the hub 31 of the rotor 30 is provided with a plurality of moving blades 35 to form a cooling fan, the cooling fan has the above effects. And achieve the best heat dissipation.

While the present invention has been disclosed in its preferred embodiments, it is not intended to limit the scope of the present invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

〔this invention〕

10‧‧‧Shell

11‧‧‧ shaft tube

111‧‧‧ Groove

112‧‧‧ Positioning Department

12‧‧‧ bearing

13‧‧‧ Abutment plate

131‧‧‧through hole

132‧‧‧ slit

14‧‧‧Top support members

15‧‧‧Connecting members

16‧‧‧Front frame

161‧‧‧wind side

162‧‧‧wind side

17‧‧‧ Abutment board

171‧‧‧through hole

172‧‧‧ slit

173‧‧‧ lugs

18‧‧‧ Washer

20‧‧‧stator group

21‧‧‧Assembled holes

22‧‧‧Upper insulating sleeve

23‧‧‧Insulation sleeve

24‧‧‧矽Steel sheet

25‧‧‧Metal coil

26‧‧‧Limited parts

30‧‧‧Rotor

31‧‧·wheels

32‧‧‧Rotary axis

321‧‧‧ Ring groove

33‧‧‧ ring magnet

34‧‧‧ combination seat

35‧‧‧ moving leaves

9‧‧‧Motor

91‧‧‧Shell

911‧‧‧ shaft tube

92‧‧‧Rotor

921‧‧‧Rotary axis

922‧‧‧ card slot

93‧‧‧stator group

94‧‧‧ buckle

95‧‧‧ oil storage cylinder

96‧‧‧ bearing

Figure 1: A cross-sectional view of a conventional motor.

Fig. 2 is an exploded perspective view showing the first embodiment of the present invention.

Fig. 3 is a sectional view showing the combination of the first embodiment of the present invention.

Fig. 4 is a top plan view showing the combination of the stator set and the housing of the first embodiment of the present invention.

Fig. 5 is an exploded perspective view showing a second embodiment of the present invention.

Figure 6 is a sectional view showing the combination of the second embodiment of the present invention.

Fig. 7 is a cross-sectional view showing the combination of the motor of the present invention in a heat dissipating fan.

10‧‧‧Shell

11‧‧‧ shaft tube

111‧‧‧ Groove

112‧‧‧ Positioning Department

12‧‧‧ bearing

13‧‧‧ Abutment plate

131‧‧‧through hole

132‧‧‧ slit

14‧‧‧Top support members

20‧‧‧stator group

21‧‧‧Assembled holes

22‧‧‧Upper insulating sleeve

23‧‧‧Insulation sleeve

24‧‧‧矽Steel sheet

25‧‧‧Metal coil

26‧‧‧Limited parts

30‧‧‧Rotor

31‧‧·wheels

32‧‧‧Rotary axis

321‧‧‧ Ring groove

33‧‧‧ ring magnet

34‧‧‧ combination seat

Claims (33)

A motor comprising: a housing having a shaft tube at the center, the shaft tube incorporating a bearing, the top end of the shaft tube having at least one groove, the groove being formed by a downward notch of the top of the shaft tube; a rotor a central axis is provided with a rotating shaft pivotally connected to the bearing; and a certain subset has an axially extending assembly hole, and the assembly hole is sleeved on the outer circumferential surface of the shaft tube, and the stator assembly has at least one The limiting member passes through the groove of the shaft tube and protrudes inside the shaft tube to restrict the bearing from being loose. The motor of claim 1, wherein the shaft tube has an abutment plate having a through hole, and the abutment plate is located at the top of the bearing and is pressed by the stopper. The motor of claim 2, wherein the outer peripheral surface of the rotating shaft has a diameter reducing portion to form a ring groove, and an inner edge of the through hole of the abutting plate is located in the ring groove. The motor of claim 2, wherein the through hole diameter of the abutting plate is smaller than an outer diameter of the rotating shaft and slightly larger than an outer diameter of the reducing portion of the rotating shaft forming the annular groove. The motor of claim 2, wherein the abutment plate is provided with at least one radially projecting lug that is engaged with the groove of the shaft tube. The motor according to claim 5, wherein the abutting plate is It is assumed that the radial length of the lug does not exceed the outer diameter of the shaft tube. The motor of claim 1 or 3, wherein the stator set is a radial winding set, the stator set comprises an assembly hole, an upper insulating sleeve, a lower insulating sleeve, a silicon steel sheet, a metal coil and at least a limiting member, the at least one limiting member is protruded from the upper insulating sleeve toward the assembly hole. The motor of claim 2, wherein the peripheral edge of the through hole of the abutment plate is formed with a plurality of slits in the radial direction. The motor according to claim 1 or 2 or 3, wherein the outer peripheral wall of the shaft tube of the housing is provided with a positioning portion, and the stator assembly is axially positioned at the positioning portion. The motor of claim 1 or 2 or 3, wherein the limiting member is engaged with the groove of the shaft tube, and the horizontal width of the limiting member is not greater than the lateral width of the groove. The motor of claim 1 or 2 or 3, wherein a support member is disposed under the bearing in the shaft tube, and one end of the rotating shaft is abutted against the top support member. A heat dissipating fan comprising: an outer frame connected to a housing by a plurality of connecting members, a shaft tube is disposed in the center of the housing, the shaft tube is built into a bearing, and the top end of the shaft tube has at least one groove, The groove is formed by a downward notch of the top of the shaft tube; a fan wheel is provided with a plurality of moving blades by a peripheral surface of the hub, and a rotating shaft is disposed in the hub by a coupling seat, and the rotating shaft is pivotally connected to the bearing; And a certain subgroup having an axially through assembly hole, the assembly hole sleeve Provided on an outer circumferential surface of the shaft tube, the stator assembly has at least one limiting member passing through the groove of the shaft tube and protruding inside the shaft tube to restrict the bearing from being loose. The heat dissipating fan according to claim 12, wherein the shaft tube is provided with an abutting plate having a through hole, and the abutting plate is located at the top of the bearing and is pressed by the limiting member. The heat dissipation fan of claim 13, wherein the outer peripheral surface of the rotating shaft has a diameter reducing portion to form a ring groove, and an inner edge of the through hole of the abutting plate is located in the ring groove. The heat dissipation fan according to claim 13 or 14, wherein the through hole diameter of the abutting plate is smaller than the outer diameter of the rotating shaft, and is slightly larger than the outer diameter of the diameter of the annular groove of the rotating shaft. The heat dissipating fan according to claim 13 or claim 14, wherein the abutting plate is provided with at least a radially protruding lug, and the lug is engaged with the groove of the shaft tube. The heat dissipation fan of claim 16, wherein the abutment plate has a lug having a radial length that does not exceed an outer diameter of the shaft tube. The heat dissipating fan according to claim 12 or 13, wherein the stator set is a radial winding set, the stator set comprises an assembly hole, an upper insulating sleeve, a lower insulating sleeve, a silicon steel sheet, a metal coil and The at least one limiting member protrudes from the upper insulating sleeve toward the assembly hole. The heat dissipating fan according to claim 13 or 14, wherein the peripheral edge of the through hole of the abutting plate is formed with a plurality of slits in the radial direction. According to the cooling fan described in claim 12 or 13 or 14, The outer peripheral wall of the shaft tube of the housing is provided with a positioning portion, and the stator assembly is axially positioned at the positioning portion. The heat dissipating fan of claim 12, wherein the limiting member is engaged with the groove of the shaft tube, and the horizontal width of the limiting member is not greater than the lateral width of the groove. The heat dissipating fan according to claim 12, wherein the one end of the rotating shaft is connected to the top support member. The heat dissipation fan of claim 12, wherein the connecting member is a rib. A heat dissipation fan according to claim 12, wherein the connecting member is a vane. A stator device comprising: a housing having a shaft tube at the center, the shaft tube incorporating a bearing, the top end of the shaft tube having at least one groove, the groove being formed by a downward gap of the top of the shaft tube; a certain subgroup having an axially extending assembly hole, the assembly hole being sleeved on the outer circumferential surface of the shaft tube, the stator assembly having at least one limiting member passing through the groove of the shaft tube and protruding inside the shaft tube To limit the looseness of the bearing. The stator device according to claim 25, wherein the shaft tube is provided with an abutting plate having a through hole, and the abutting plate is located at the top of the bearing and is pressed by the limiting member. The stator device of claim 26, wherein the abutment plate is provided with at least one radially protruding lug, the groove of the lug and the shaft tube Phase card. The stator device of claim 27, wherein the abutment plate has a lug having a radial length that does not exceed an outer diameter of the shaft tube. The stator device according to claim 25, wherein the stator assembly is a radial winding group, and the stator assembly comprises an assembly hole, an upper insulating sleeve, a lower insulating sleeve, a silicon steel sheet, and a metal. The coil and the at least one limiting member protrude from the upper insulating sleeve toward the assembly hole. The stator device according to claim 26, wherein the peripheral edge of the through hole of the abutting plate is formed with a plurality of slits in the radial direction. The stator device according to claim 25, wherein the outer peripheral wall of the shaft tube of the housing is provided with a positioning portion, and the stator assembly is axially positioned at the positioning portion. The stator device of claim 25, wherein the limiting member is engaged with the groove of the shaft tube, and the horizontal width of the limiting member is not greater than the lateral width of the groove. The stator device of claim 25 or 26 or 27, wherein a bearing member is disposed under the bearing in the shaft tube of the housing.