TWM463292U - Dustproof and oil leakage prevention DC brushless heat dissipation fan - Google Patents

Abstract

The utility model discloses a dustproof and oil leakage prevention direct-current (DC) brushless cooling fan which comprises an outer frame, fan blades, a shaft core, an iron shell, a magnetic rubber component, an upper insulating sleeve, a silicon steel piece, a lower insulating sleeve, a printed circuit board (PCB), a shaft sleeve and a spring gasket. The outer frame and the fan blades are matched at two ends to form an enclosed structure. The shaft core is mounted between the outer frame and the fan blades. The shaft sleeve, an outer frame middle pipe, the silicon steel piece, the upper insulating sleeve, the lower insulating sleeve, the magnetic rubber component and the iron shell are respectively connected in a sleeved mode in the radial direction from the shaft core to the fan blades at the most peripheral positions. A first dustproof and oil leakage prevention structure is arranged between the outer frame and the fan blades, a second dustproof and oil leakage prevention structure is arranged between the upper insulating sleeve and the fan blades, and a third dustproof and oil leakage prevention structure is arranged between the upper insulating sleeve and the shaft sleeve. Due to the fact that the dustproof and oil leakage prevention DC brushless cooling fan is provided with the three dustproof and oil leakage prevention structures, external impurities and dust can be effectively prevented from entering a space between the central shaft core and a bearing, the situation that the shaft core is blocked due to the fact that the dust or the impurities enter bearing holes is avoided, and a dustproof and oil leakage prevention structure between the upper insulating sleeve and the bearing can prevent lubricating oil from leaking out of the space between the bearing and the shaft core. Therefore, a complete lubricating oil circulating passageway is formed, and the lubricating effect is guaranteed.

Description

Dust-proof and oil-proof DC brushless cooling fan

The present invention relates to a cooling fan, and more particularly to a DC brushless cooling fan having a dustproof and oil leakage preventing structure.

DC brushless heat-dissipating fan with DC dust-proof and oil-proof structure. Generally speaking, the structure of the cooling fan includes a shaft core, a bushing and a fan blade. The fan blade is mounted on the shaft core and is driven to rotate in the shaft core, the sleeve and the fan. The matching mechanism of the leaf needs to prevent dust from intruding, and the central oil passage needs lubricating oil for circulation lubrication, so that the fan stator and the central shaft core and the sleeve portion are smoothly operated in the dust-free space. Currently, the conventional fan has a long use time and lubrication. The oil is lost and causes a problem of high noise and short life; the inside enters dust and fine particles, hinders lubrication, and is unstable in operation.

In order to solve the above problems, this paper proposes a dust-proof and oil-proof DC brushless cooling fan. The multi-channel dust-proof and oil-proof structure ensures smooth lubrication of the internal oil circuit, prevents external dust from entering, and keeps the rotating shaft with stable and effective operation.

The created DC brushless cooling fan comprises an outer frame, a fan blade, a shaft core, an iron shell, a plastic magnet, an upper insulating sleeve, a silicon steel sheet, a lower insulating sleeve, a PCB board, a bushing, a spring washer, wherein the outer frame and the fan The leaf is combined with a closed structure from both ends, and the outer frame is provided with an outer frame tube, and the fan blade is provided with a fan blade sleeve, and the outer frame and the fan blade respectively are sleeved and matched with other components in the outer frame tube and the fan blade; The core is installed between the outer frame and the fan blade, and the sleeve is sleeved from the radial direction to the outermost fan blade. The outer frame tube, the silicon steel sheet, the upper and lower insulating sleeves, the plastic magnetic and the iron shell, the first dustproof and oil leakage preventing structure is arranged between the outer frame and the fan blade; and the second insulating sleeve and the fan blade are provided with a second Dust-proof and oil-proof structure; a third dust-proof and oil-proof structure is arranged between the upper insulating sleeve and the sleeve.

The upper insulating sleeve and the lower insulating sleeve are sleeved at two ends of the sleeve, and a retaining ring and/or a spring washer are respectively disposed between the sleeve and the upper insulating sleeve, the sleeve and the bottom of the outer frame.

The first dustproof and leakproof structure, that is, the dustproof and oil leakage structure between the outer frame and the blade, is composed of a stepped surrounding edge of the outer frame and a blade shell, wherein the stepped surrounding edge corresponds to the blade shell, The bottom end of the fan blade shell has a reverse step structure which can be nested with the stepped edge of the outer frame.

The second dustproof and leakproof structure, that is, the dustproof and oil leakage structure between the upper insulating sleeve and the blade is formed by an annular groove of the upper insulating sleeve and a fan annular rib, the annular rib and the annular groove Correspondingly, the annular ribs are embedded in the annular groove.

The second dustproof and leakproof structure, that is, the dustproof and oil leakage structure between the upper insulating sleeve and the sleeve is formed by an upper insulating sleeve with a retaining ring, and a blocking block is arranged between the sleeve and the upper insulating sleeve The ring has a smaller aperture than the shaft core, and closes the space between the shaft core and the sleeve.

The sleeve has upper and lower end faces and a cylindrical outer surface, the cylindrical outer surface is connected to the upper and lower end faces, chamfered at the upper and lower end faces, and a spiral groove is provided on the end face, The cylindrical outer surface is provided with a linear groove in the axial direction.

A first annular recess is formed in the upper end surface of the sleeve, and the first annular recess is connected to the central shaft hole and coaxial.

A first annular recessed hole is disposed on the upper end surface of the sleeve, and a second annular recessed hole is disposed on the lower end surface, and the first annular recessed hole and the second annular recessed hole are connected to the central shaft hole and coaxial.

a cross spring pad is arranged between the lower end surface of the sleeve and the spring washer The inner diameter of the cross spring washer is smaller than the outer diameter of the core.

The inner wall of the outer frame tube is provided with grooves and/or ribs, and the grooves and ribs are disposed along the axial direction of the outer frame tube.

The beneficial effects of the creation: the dustproof and oil leakage cooling fan has three dustproof and oil leakage preventing structures, which can effectively block external impurities and dust from intruding between the central shaft core and the bearing, thereby avoiding the intrusion of dust or impurities into the bearing hole and causing the shaft. The core is stuck, and the dust-proof and oil-proof structure between the upper insulating sleeve and the bearing can prevent the lubricating oil from leaking out from the space between the bearing and the shaft core, and constitute a complete lubricating oil circulation passage to ensure the lubricating effect.

10‧‧‧Front frame

101‧‧‧Outer frame tube

102‧‧‧

11‧‧‧ fan leaves

111‧‧‧Fan leaf shell

112‧‧‧Ring ribs

12‧‧‧Axis core

13‧‧‧ iron shell

14‧‧‧Micromagnetic

15‧‧‧Insulation sleeve

151‧‧‧ annular groove

16‧‧‧矽Steel sheet

17‧‧‧Insulation sleeve

18‧‧‧PCB board

19‧‧‧ bushings

191‧‧‧ upper end

1911‧‧‧First annular recess

192‧‧‧ lower end

1921‧‧‧Second annular recess

1922‧‧‧ Ribs

193‧‧‧ cylindrical outer surface

194‧‧‧Spiral groove

195‧‧‧Linear groove

20‧‧‧Spring washers

21‧‧‧cross spring washer

22‧‧ ‧ retaining ring

23‧‧‧First dust-proof and oil-proof structure

24‧‧‧Second dustproof and oil leakage structure

25‧‧‧ Third dustproof and oil leakage structure

Fig. 1 is a schematic view showing the explosion structure of the dust-proof and oil-proof DC brushless cooling fan of the present invention.

2 is a partial cross-sectional view of the dust-proof and oil-proof DC brushless cooling fan of the present invention.

Figure 3 is a cross-sectional view of the dust-proof and oil-proof DC brushless cooling fan bushing of the present invention.

4 is a cross-sectional view of the dust-proof and oil-proof DC brushless cooling fan bushing of the present invention.

Fig. 5 is a circuit diagram of the oil circuit running between the core bushings of the dust-proof and oil-proof DC brushless cooling fan of the present invention.

The detailed structure and principle of the dust-proof and oil-proof cooling fan of the present invention will be described below with reference to the accompanying drawings and embodiments.

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of an explosion structure of a cooling fan. The brushless cooling fan includes an outer frame 10 , a fan blade 11 , a shaft core 12 , an iron shell 13 , a magnetic core 14 , an upper insulating sleeve 15 , and a silicon steel sheet 16 . The lower insulating sleeve 17, the PCB board 18, the sleeve 19, and the spring washer 20, wherein the outer frame 10 and the fan blade 11 are combined with a closed structure from both ends, and the outer frame 10 is provided with an outer frame tube 101 and a fan blade 11 A fan blade sleeve 111 is disposed on the outer frame 10 and the fan blade 11 respectively, and the outer tube 10 and the blade sleeve 111 are sleevedly engaged with other components; the shaft core 12 is installed between the outer frame 10 and the fan blade 11 from the core 12 along the radial direction to the outermost blade 11, respectively, a sleeve 19, an outer frame tube 101, a silicon steel sheet 16, an upper insulating sleeve 15 and a lower insulating sleeve 17, a magnetic core 14 and an iron shell 13, A first dust-proof and oil-proof structure 23 is disposed between the outer frame 10 and the blade 11; a second dust-proof and oil-proof structure 24 is disposed between the upper insulating sleeve 15 and the blade 11; and the upper insulating sleeve 15 and the shaft A third dustproof and oil leakage structure 25 is disposed between the sleeves 19.

In a specific embodiment, a tripod can be used instead of the outer frame, and the internal structure is substantially the same, both have a middle tube structure, and the middle tube structure and the outer frame tube can completely close the shaft core and the sleeve from the bottom. One end of the rotating structure is completely enclosed, and it is only necessary to close the other end to prevent oil leakage.

As can be seen from the cross-sectional view of the fan of Fig. 2, the core 12 and the sleeve 19 are completely inserted into the outer frame tube 101, and then the outer steel tube 16 is covered with a silicon steel sheet 16, an upper insulating sleeve 15 and a lower insulation. The sleeve 17, the upper insulating sleeve 15 is opposite to the open end of the outer frame tube 101, and the one side opening is closed, the lower insulating sleeve 17 is sleeved at the lower end of the outer frame tube 101, and the silicon steel sheet 16 is caught between the upper insulating sleeve and the lower insulating sleeve. .

The upper insulating sleeve 15 and the lower insulating sleeve 17 are sleeved on both ends of the sleeve 19, and a retaining ring 22 is disposed between the sleeve 19 and the upper insulating sleeve 15 to form a third dustproof and oil leakage preventing structure 25.

A spring washer 20 is disposed between the sleeve 19 and the bottom of the outer frame tube.

The first dust-proof and oil-proof structure 23, that is, the dust-proof and oil-proof structure between the outer frame 10 and the blade 11, is formed by the stepped edge 102 of the outer frame 10 and the blade shell 111. The edge 102 corresponds to the blade shell 11 and has a stepped edge at the bottom end of the blade shell 111 102 phase nested reverse ladder structure.

The second dust-proof and oil-proof structure 24, that is, the dust-proof and oil-proof structure between the upper insulating sleeve 15 and the blade 11, is formed by the annular groove 151 of the upper insulating sleeve 15 and the annular rib 112 of the blade 11. The annular rib 112 is correspondingly fitted with the annular groove 151, and the annular rib 112 is embedded in the annular groove 151. The annular groove disposed above the upper insulating sleeve and the annular rib 112 outside the blade step enable the shaft core and the sleeve to be in a relatively sealed space to form an annular cover structure, which effectively prevents dust from entering and lubricating oil from overflowing. Of course, for the understanding of the structural principle, the positions of the annular groove and the annular ridge can be reversely arranged, the annular groove is disposed in the blade memory, and the annular rib is disposed on the upper insulating sleeve.

The protruding glue position allows the central stator portion to form a relatively sealed space, which can effectively block the intrusion of external impurities or dust.

The third dustproof and oil leakage structure 25, that is, the dustproof and oil leakage structure between the upper insulating sleeve 15 and the sleeve 19 is composed of an upper insulating sleeve 15 with a retaining ring 22, and the sleeve 19 is insulated from the upper portion. A retaining ring 22 is provided between the sleeves 15. The retaining ring 22 has a slightly larger aperture than the shaft core 12 to enclose the space between the shaft core 12 and the sleeve 19. The upper sleeve 15 of the retaining ring 22 is pressed against the fixed bushing 19 in the outer frame tube. The upper insulating sleeve 15 of the retaining ring 22 encloses the inside of the fan center column to form a closed space, preventing the shaft from being closed. The lubricating oil on the outer wall overflows and forces it to flow back.

The sleeve 19 has an upper end surface 191 and a lower end surface 192 and a cylindrical outer surface 193. The cylindrical outer surface 193 is connected to the upper end surface 191 and the lower end surface 192, and is chamfered at the upper and lower end faces, and is disposed on the end surface. There is a spiral groove 194, and a linear groove 195 in the axial direction is provided on the cylindrical outer surface 193. a first ring is disposed on the upper end surface 191 of the sleeve a recessed hole 1911, the first annular recessed hole 1911 is connected to the central shaft hole and coaxial. In a specific embodiment, a second annular recessed hole 1921 may also be provided in the lower end surface 192, the first annular recessed hole 1911 and The second annular recess 1921 is connected to the central shaft hole and coaxial.

The sleeve 19 has a first annular recess 1911 and a second annular recess 1921 at the center of the inner and lower ends of the sleeve, except that the upper and lower surfaces of the spiral groove 194 are retained, and the linear groove 195 is added to the outer surface 193. In this way, the burrs remaining in the turning position during the processing of the core 12 can be avoided, and the most important thing is to directly increase the internal oil storage space of the fan, so as to prevent the lubricating oil from overflowing or smashing when the fan rotates due to the small internal oil storage space when the fan is running. Out, the amount of lubricating oil is insufficient, the degree of lubrication is not enough; and the capillary principle of the inner hole of the sleeve is used to make the loop of lubricating oil forming around the sleeve when the fan is running, and the upper and lower sides are penetrated; The pressure at both ends of the sleeve is concentrated, and the burrs generated on both end faces of the sleeve are effectively avoided. When the sleeve is pressed, the inner wall of the outer frame tube is scratched, and the shavings caused by the scratch will cause the sleeve core. Produces an abnormal sound during operation; in order to make the sleeve completely press the bottom spring washer to avoid noise or bad vibration due to the looseness of the spring washer during high-speed rotation, in the above-mentioned spiral groove, linear groove and annular recessed hole The base, the sleeve extending in a second annular recesses at a lower end surface 19 of 1921 ribs 1922, the ribs 1922 have four end faces of the sleeve along the lower circumferential direction uniform. The annular recessed hole is arranged above and below the sleeve, which is equivalent to increasing the oil storage space of the sleeve. When the fan rotates, the lubricating oil increases due to the atmospheric pressure in the sleeve, and the tangent tang is on the inner wall of the sleeve. The annular recessed hole space of the sleeve end face is increased, and the lubricating oil will re-aggregate at the bottom of the shaft core after stopping the rotation, thereby achieving the purpose of maintaining the stable operation of the fan for a long time.

A cross spring washer 21 is disposed between the lower end surface 192 of the sleeve 19 and the spring washer 20, and the inner diameter of the cross spring washer 21 is smaller than the outer diameter of the shaft core.

The inner wall of the outer frame tube is provided with grooves and/or ribs, and the grooves and ribs are disposed along the axial direction of the outer frame tube.

The beneficial effects of the creation: the dustproof and oil leakage cooling fan has three dustproof and oil leakage preventing structures, which can effectively block external impurities and dust from intruding between the central shaft core and the bearing, thereby avoiding the intrusion of dust or impurities into the bearing hole and causing the shaft. The core is stuck, and the dust-proof and oil-proof structure between the upper insulating sleeve and the bearing can prevent the lubricating oil from leaking out from the space between the bearing and the shaft core, and constitute a complete lubricating oil circulation passage to ensure the lubricating effect.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Although the present invention is disclosed above in the preferred embodiment, it is not intended to limit the present invention, and any skilled person skilled in the art. The equivalents of the above-described technical solutions may be changed or modified to equivalent changes without departing from the spirit and scope of the present invention. Any simple modifications, equivalent changes, and modifications made by the above embodiments are within the scope of the present invention.

10‧‧‧Front frame

11‧‧‧ fan leaves

111‧‧‧Fan leaf shell

12‧‧‧Axis core

13‧‧‧ iron shell

14‧‧‧Micromagnetic

15‧‧‧Insulation sleeve

16‧‧‧矽Steel sheet

17‧‧‧Insulation sleeve

18‧‧‧PCB board

19‧‧‧ bushings

20‧‧‧Spring washers

21‧‧‧cross spring washer

Claims (9)

The utility model relates to a dust-proof and oil-proof DC brushless cooling fan, which comprises an outer frame, a fan blade, a shaft core, an iron shell, a plastic magnet, an upper insulating sleeve, a silicon steel sheet, a lower insulating sleeve, a PCB board, a bush sleeve and a spring washer. The outer frame and the fan blade are combined with a closed structure from both ends, and the outer frame is provided with a frame tube on the outer frame, a fan blade sleeve is arranged on the fan blade, and the outer frame and the fan blade are respectively arranged in the outer frame tube and the fan. The sleeve is sleeved with the silicon steel sheet, the upper and lower insulating sleeves, the plastic magnet, the PCB board and the iron shell; the shaft core is installed between the outer frame and the fan blade, and the fan blade is arranged from the radial direction to the outermost fan blade. A bushing, an outer frame tube, a silicon steel sheet, an upper and lower insulating sleeve, a plastic magnet, a PCB board and an iron shell are arranged, and a first dustproof and oil leakage preventing structure is arranged between the outer frame and the blade; the upper insulating sleeve is A second dustproof and oil leakage structure is disposed between the fan blades; a third dustproof and oil leakage structure is disposed between the upper insulating sleeve and the sleeve; the upper insulating sleeve and the lower insulating sleeve are sleeved at both ends of the sleeve, A retaining ring and/or a spring washer are respectively disposed between the sleeve and the upper insulating sleeve, the sleeve and the bottom of the outer frame tube. The dust-proof and oil-proof DC brushless heat-dissipating fan according to claim 1, wherein the first dust-proof and oil-proof structure is composed of a stepped edge of the outer frame and a blade shell. The stepped edge corresponds to the blade shell, and the bottom end of the blade shell has a reverse step structure which can be nested with the stepped edge of the outer frame. The dust-proof and oil-proof DC brushless heat-dissipating fan according to claim 1, wherein the second dust-proof and oil-proof structure is formed by an annular groove of the upper insulating sleeve and a fan-shaped annular rib. The annular ribs are correspondingly mated with the annular grooves, and the annular ribs are embedded in the annular grooves. The dust-proof and oil-proof DC brushless heat-dissipating fan according to claim 1, wherein the third dust-proof and oil-proof structure is composed of an upper insulating sleeve with a retaining ring, the sleeve A retaining ring is arranged between the upper insulating sleeve and the upper insulating sleeve, and the outer diameter of the retaining ring is slightly larger than the axial core, and the space between the axial core and the sleeve is closed. The dust-proof and oil-proof DC brushless heat dissipation fan according to claim 1, wherein the sleeve has upper and lower end faces and a cylindrical outer surface, and the cylindrical outer surface is connected to the upper and lower sides. An end surface chamfered at the upper and lower end faces and a spiral groove on the end surface Further, a linear groove in the axial direction is provided on the cylindrical outer surface. The dust-proof and oil-proof DC brushless heat-dissipating fan according to claim 5, wherein the upper end surface of the sleeve is provided with a first annular recessed hole, and the first annular recessed hole The central shaft holes are connected and coaxial. The dust-proof and oil-proof DC brushless heat-dissipating fan according to claim 5, characterized in that: a second annular recessed hole is formed on a lower end surface of the sleeve, and the second annular recessed hole is opposite to the central axial hole Connected and coaxial. The dust-proof and oil-proof DC brushless heat dissipation fan according to the first aspect of the invention, characterized in that: a cross spring washer is disposed between the lower end surface of the sleeve and the spring washer, the cross spring The inner hole of the gasket is smaller than the outer diameter of the core. A DC brushless heat dissipation fan according to claim 1, wherein the inner wall of the outer frame tube is provided with a groove and/or a rib, the groove and the rib. The plate is placed along the axial direction of the outer frame tube.