CN203067311U - Dust-proof and oil-leakage-proof DC brushless cooling fan - Google Patents

Abstract

A dustproof and oil leakage-proof direct-current brushless radiating fan comprises an outer frame, fan blades, a shaft core, an iron shell, a rubber magnet, an upper insulating sleeve, a silicon steel sheet, a lower insulating sleeve, a PCB (printed circuit board), a shaft sleeve and a spring gasket, wherein the outer frame and the fan blades are matched into a closed structure from two ends; the shaft core is arranged between the outer frame and the fan blades, the shaft sleeve, the middle pipe of the outer frame, the silicon steel sheet, the upper and lower insulating sleeves, the rubber magnet and the iron shell are respectively sleeved on the fan blades from the shaft core to the outermost periphery along the radial direction, and 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 insulation sleeve and the fan blade; a third dust and oil prevention and leakage prevention structure is arranged between the upper insulating sleeve and the shaft sleeve. This dustproof leak protection oil cooling fan has three dustproof leak protection oil structures, can effectively block between outside impurity and the dust invasion central spindle core and the bearing, avoids leading to the spindle core card to die because of dust or impurity invade in the bearing hole, goes up dustproof leak protection oil structure between insulating cover and the bearing moreover and can prevent that lubricating oil from leaking out from the space between bearing and the spindle core, constitutes a complete lubricating oil circulation passageway, guarantees lubricated effect.

Description

Dust-proof and oil-leakage-proof DC brushless cooling fan

【Technical field】

The utility model relates to a cooling fan, in particular to a DC brushless cooling fan with a dust-proof and oil-leakage-proof structure.

【Background technique】

DC brushless cooling fan with DC dust-proof and oil-leakage-proof structure. Generally speaking, the structure of the cooling fan includes a shaft core, a shaft sleeve and fan blades. The fan blades are installed on the shaft core and driven to rotate. The matching mechanism of the fan blade needs to prevent the intrusion of dust, and the central oil circuit needs lubricating oil to circulate and lubricate, so that the fan stator, central shaft core and shaft sleeve can run smoothly in a dust-free space. At present, the traditional fan has a long service life. The loss of lubricating oil causes the problems of high noise and short life; dust and fine particles enter the interior, hindering the lubrication effect, and the operation is unstable.

【Content of invention】

Aiming at the above problems, the utility model proposes a dust-proof and oil-leakage-proof DC brushless heat dissipation fan. The multi-channel dust-proof and oil-leakage structure ensures smooth and circulating lubrication of the internal oil circuit, prevents external dust from entering, and maintains the matching structure of the rotating shaft. Stable and efficient operation.

The utility model DC brushless cooling fan includes an outer frame, fan blades, shaft core, iron shell, rubber magnet, upper insulating sleeve, silicon steel sheet, lower insulating sleeve, PCB board, shaft sleeve, spring gasket, wherein the outer frame and The fan blade is fitted into a closed structure from both ends, the outer frame is provided with a tube in the outer frame, and the fan blade is provided with a fan blade cover, and the outer frame and the fan blade are respectively socketed and matched with other components; The shaft core is installed between the outer frame and the fan blades. From the shaft core along the radial direction to the outermost fan blades, there are sleeves, outer frame tubes, silicon steel sheets, upper and lower insulating sleeves, plastic magnets and iron shells respectively. , a first dust-proof and oil-leakage-proof structure is set between the outer frame and the fan blade; a second dust-proof and oil-leakage structure is set between the upper insulating sleeve and the fan blade; There is a third dust-proof and oil-leakage-proof structure.

The upper insulating sleeve and the lower insulating sleeve are sleeved on both ends of the shaft sleeve, and retaining rings and/or spring washers are respectively provided between the shaft sleeve and the upper insulating sleeve, and between the shaft sleeve and the bottom of the outer frame.

The first dust-proof and leak-proof structure, that is, the dust-proof and oil-leakage-proof structure between the outer frame and the fan blade is composed of the stepped surround of the outer frame and the fan blade shell, and the stepped surround corresponds to the fan blade shell , there is a reverse stepped structure at the bottom of the fan blade shell that can be nested with the stepped edge of the outer frame.

The second dust-proof and leak-proof structure, that is, the dust-proof and oil-leakage-proof structure between the upper insulating sleeve and the fan blade is composed of the annular groove of the upper insulating sleeve and the annular raised strip of the fan blade. The grooves are fitted together correspondingly, and the annular protruding strips are embedded in the annular grooves.

The second dust-proof and leak-proof structure, that is, the dust-proof and oil-leakage-proof structure between the upper insulating sleeve and the shaft sleeve is composed of an upper insulating sleeve with a retaining ring. A stop ring, the hole diameter of which is slightly larger than the shaft core, seals the space between the shaft core and the shaft sleeve.

The bushing has upper and lower end surfaces and a cylindrical outer surface, the cylindrical outer surface connects the upper and lower end surfaces, the upper and lower end surfaces are chamfered, and a spiral groove is provided on the end surface, and the Linear grooves along the axial direction are arranged on the cylindrical outer surface.

A first annular concave hole is provided on the upper end surface of the shaft sleeve, and the first annular concave hole is connected with the central shaft hole and is coaxial.

A first annular concave hole is provided on the upper end surface of the shaft sleeve, and a second annular concave hole is provided on the lower end surface. The first annular concave hole and the second annular concave hole are connected with the central shaft hole and are coaxial.

A cross spring washer is arranged between the lower end surface of the shaft sleeve and the spring washer, and the inner hole of the cross spring washer is smaller than the outer diameter of the shaft core.

Grooves and/or ribs are provided on the inner wall of the tube in the outer frame, and the grooves and ribs are arranged along the axial direction of the tube in the outer frame.

Beneficial effects of the utility model: the dust-proof and oil-leakage-proof cooling fan has three dust-proof and oil-leakage structures, which can effectively prevent external impurities and dust from intruding between the central shaft core and the bearing, and avoid dust or impurities from intruding into the bearing hole The inner shaft core is stuck, and the dust-proof and oil-leakage structure between the upper insulating sleeve and the bearing can prevent the lubricating oil from leaking from the space between the bearing and the shaft core, forming a complete lubricating oil circulation channel to ensure the lubrication effect.

【Description of drawings】

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

Fig. 2 is a partial cross-sectional view of the dustproof and oil-leakage-proof DC brushless cooling fan of the utility model;

Fig. 3 is a sectional view of the bushing of the dustproof and oil-leakage-proof DC brushless cooling fan of the present invention;

Fig. 4 is a sectional view of the bushing of the dustproof and oil-leakage-proof DC brushless cooling fan of the present invention;

Fig. 5 is a circuit diagram of the oil circuit between the shaft core and bushing of the dust-proof and oil-leakage-proof DC brushless cooling fan of the utility model.

Among them: 10. Outer frame; 101. Tube in the outer frame; 102. Surrounding edge; 11. Fan blade; 111. Fan blade shell; 112. Annular convex strip; 12. Shaft core; 13. Iron shell; 14. Rubber magnet 15, upper insulating sleeve; 151, annular groove; 16, silicon steel sheet; 17, lower insulating sleeve; 18, PCB board; 19, axle sleeve; 191, upper end face; 1911, first annular concave hole; End face; 1921, second annular concave hole; 1922, rib; 193, cylindrical outer surface; 194, spiral groove; 195, linear groove; 20, spring washer; 21, cross spring washer; 22, stop ring; 23, the first dust-proof and oil-spill-proof structure; 24, the second dust-proof and oil-spill-proof structure; 25, the third dust-proof and oil-spill-proof structure.

【Detailed ways】

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

Please refer to the accompanying drawing 1, which is a schematic diagram of the explosion structure of the cooling fan. The brushless cooling fan includes an outer frame 10, a fan blade 11, a shaft core 12, an iron shell 13, a plastic magnet 14, an upper insulating sleeve 15, a silicon steel sheet 16, The lower insulating sleeve 17, the PCB board 18, the shaft sleeve 19, and the spring spacer 20, wherein the outer frame 10 and the fan blade 11 cooperate to form a closed structure from both ends, and the outer frame 10 is provided with an outer frame middle tube 101 and an upper fan blade 11. A fan blade cover 111 is provided, and the outer frame 10 and the fan blade 11 are respectively fitted with the tube in the outer frame 101 and the fan blade cover 111 with other components; the shaft core 12 is installed between the outer frame 10 and the fan blade 11, and the Along the radial direction to the outermost fan blade 11, there are sleeves 19, outer frame tube 101, silicon steel sheet 16, upper insulating sleeve 15, lower insulating sleeve 17, plastic magnet 14 and iron shell 13 respectively. A first dust-proof and oil-leakage-proof structure 23 is arranged between the outer frame 10 and the fan blade 11; a second dust-proof and oil-leakage-proof structure 24 is arranged between the upper insulating sleeve 15 and the fan blade 11; A third dust-proof and oil-leakage-proof structure 25 is provided between the shaft sleeves 19 .

In a specific embodiment, a tripod can be used to replace the outer frame, and its internal structure is roughly the same, and both have a middle tube structure, and both the middle tube structure and the outer frame middle tube can make the shaft core and the shaft sleeve completely closed from the bottom, One end of the rotating structure is completely closed, and it only needs to be closed from the other end to prevent oil leakage.

It can be seen from the cross-sectional view of the fan in Figure 2 that the shaft core 12 and the shaft sleeve 19 are completely installed in the tube 101 in the outer frame, and then the silicon steel sheet 16, the upper insulating sleeve 15 and the lower insulating sleeve 15 are placed on the periphery of the tube 101 in the outer frame. Cover 17, the upper insulating cover 15 is opposed to the open end of the outer frame middle tube 101, and seals one side of the opening, the lower insulating cover 17 is sleeved on the lower end of the outer frame middle tube 101, and the silicon steel sheet 16 is stuck between the upper insulating cover and the lower insulating cover .

The upper insulating sleeve 15 and the lower insulating sleeve 17 are sleeved on both ends of the shaft sleeve 19, and a retaining ring 22 is provided between the shaft sleeve 19 and the upper insulating sleeve 15 to form a third dust-proof and oil-leakage-proof structure 25.

Spring washers 20 are respectively provided between the shaft sleeve 19 and the bottom of the tube in the outer frame.

The first dust-proof and oil-leakage-proof structure 23, that is, the dust-proof and oil-leakage-proof structure between the outer frame 10 and the fan blade 11 is composed of the stepped edge 102 of the outer frame 10 and the fan blade shell 111. The shaped surrounding edge 102 corresponds to the fan blade case 11 , and has a reverse stepped structure at the bottom of the fan blade case 111 that can be nested with the stepped outer frame surrounding edge 102 .

The second dust-proof and oil-leakage-proof structure 24, that is, the dust-proof and oil-leakage-proof structure between the upper insulating sleeve 15 and the fan blade 11 is formed by the annular groove 151 of the upper insulating sleeve 15 and the annular convex strip 112 of the fan blade 11. In this configuration, the annular raised strip 112 is matched with the annular groove 151 correspondingly, and the annular raised strip 112 is embedded in the annular groove 151 . The annular groove provided above the upper insulating sleeve and the annular convex strip 112 on the outside of the fan blade step make the shaft core and the shaft sleeve in a relatively sealed space, forming an annular cover structure, which effectively prevents dust from entering and lubricating oil from overflowing. Of course, based on the understanding of the structural principle, the positions of the annular groove and the annular protruding strip can be set in reverse, the annular groove is arranged in the memory of the fan blade, and the annular protruding strip is arranged on the upper insulating sleeve.

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

The third dust-proof and oil-leakage-proof structure 25, that is, the dust-proof and oil-leakage structure between the upper insulating sleeve 15 and the shaft sleeve 19 is composed of the upper insulating sleeve 15 with a retaining ring 22, and the shaft sleeve 19 and the A retaining ring 22 is arranged between the upper insulating sleeves 15 , and the diameter of the retaining ring 22 is slightly larger than that of the shaft core 12 to seal the space between the shaft core 12 and the shaft sleeve 19 . Use the upper insulating sleeve 15 of the retaining ring 22 to press the fixed shaft sleeve 19 in the outer frame tube, and the upper insulating sleeve 15 of the retaining ring 22 will seal the inside of the fan center column to form a closed space, preventing the shaft sleeve from Lubricating oil ascending the outer wall overflows and forces it back.

Described axle sleeve 19 has upper end surface 191 and lower end surface 192 and a cylindrical outer surface 193, and this cylindrical outer surface 193 connects upper end surface 191 and lower end surface 192, chamfers on described upper and lower end surfaces, and is provided with on the end surface There is a helical groove 194 , while a linear groove 195 along the axial direction is provided on the cylindrical outer surface 193 . The upper end surface 191 of the bushing is provided with a first annular concave hole 1911, and the first annular concave hole 1911 is connected with the central shaft hole and is coaxial. The annular concave hole 1921, the first annular concave hole 1911 and the second annular concave hole 1921 are connected with the central shaft hole and are coaxial.

In addition to retaining the spiral grooves 194 on the upper and lower surfaces of the shaft sleeve 19, and adding a linear groove 195 on the outer surface 193, a first annular concave hole 1911 and a second annular concave hole 1921 are added in the center of the inner hole on the upper and lower ends of the shaft sleeve. In this way, the remaining burrs at the turning point during the processing of the shaft core 12 can be avoided. 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 being thrown out when the fan is rotating due to the small internal oil storage space when the fan is running. , the amount of lubricating oil is insufficient, and the degree of lubrication is not enough; and using the capillary principle of the inner hole of the bushing, the lubricating oil circuit is formed around the bushing when the fan is running, and it runs through up and down; in addition, both ends of the bushing are chamfered, except that the The pressure at both ends of the sleeve is concentrated, which also effectively avoids the burrs on the two ends of the sleeve. When the sleeve is pressed in, the inner wall of the tube in the outer frame will be scratched, and the shavings brought by the scratch will make the shaft core of the sleeve rotate abnormal sound; in order to make the bushing completely press the bottom spring washer to avoid noise or bad vibration due to the loosening of the spring washer during high-speed rotation, on the basis of the above-mentioned spiral groove, linear groove and annular concave hole A rib 1922 protrudes from the second annular concave hole 1921 on the lower end surface of the sleeve 19, and there are four ribs 1922, which are evenly distributed along the circumferential direction of the lower end surface of the sleeve. Annular concave holes are arranged on the upper and lower sides of the shaft sleeve, which is equivalent to increasing the oil storage space of the shaft sleeve. When the fan rotates, the lubricating oil due to the increase in the atmospheric pressure in the shaft sleeve will be tangentially thrown on the inner wall of the shaft sleeve along the direction of movement of the shaft core. The space of the annular concave hole on the end surface of the sleeve is increased, and the lubricating oil will re-accumulate at the bottom of the shaft core after the rotation is stopped, so as to achieve the purpose of maintaining the stable operation of the fan for a long time.

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

Grooves and/or ribs are provided on the inner wall of the tube in the outer frame, and the grooves and ribs are arranged along the axial direction of the tube in the outer frame.

Beneficial effects of the utility model: the dust-proof and oil-leakage-proof cooling fan has three dust-proof and oil-leakage structures, which can effectively prevent external impurities and dust from intruding between the central shaft core and the bearing, and avoid dust or impurities from intruding into the bearing hole The inner shaft core is stuck, and the dust-proof and oil-leakage structure between the upper insulating sleeve and the bearing can prevent the lubricating oil from leaking from the space between the bearing and the shaft core, forming a complete lubricating oil circulation channel to ensure the lubrication effect.

The above description is only the preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as above with the preferred embodiment, it is not used to limit the utility model. Anyone who is familiar with the utility model Professional technicians, without departing from the scope of the technical solution of the utility model, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but if they do not deviate from the technical solution of the utility model, according to The technology of the utility model refers to any simple modification, equivalent change and modification made to the above embodiments, all belong to the scope of the technical solution of the utility model.

Claims (10)

1. A dust-proof and oil-leakage-proof DC brushless cooling fan, which includes an outer frame, fan blades, shaft core, iron shell, plastic magnet, upper insulating sleeve, silicon steel sheet, lower insulating sleeve, PCB board, shaft sleeve, The spring gasket is characterized in that the outer frame and the fan blades cooperate to form a closed structure from both ends, the outer frame is provided with a tube in the outer frame, the fan blade is provided with a fan blade cover, and the outer frame and the fan blade are respectively outer frame The middle tube and fan blade cover are socketed and matched with other components; the shaft core is installed between the outer frame and the fan blade, and from the shaft core along the radial direction to the outermost fan blade, the shaft sleeve and the outer frame middle tube are respectively sleeved , silicon steel sheets, upper and lower insulating sleeves, rubber magnets and iron shells, a first dust-proof and oil-proof structure is provided between the outer frame and the fan blades; a second dust-proof and oil-proof structure is provided between the upper insulating sleeve and the fan blades Oil leakage structure; a third dust-proof and oil-leakage structure is provided between the upper insulating sleeve and the shaft sleeve. the 2. The dustproof and oil-leakage-proof DC brushless cooling fan according to claim 1, characterized in that, the upper insulating sleeve and the lower insulating sleeve are sleeved on the two ends of the shaft sleeve, and the shaft sleeve and the upper insulating sleeve, shaft A retaining ring and/or a spring washer are respectively arranged between the sleeve and the bottom of the tube in the outer frame. the 3. The dust-proof and oil-leakage-proof DC brushless cooling fan according to claim 1, characterized in that, the first dust-proof and oil-leakage structure is composed of the stepped edge of the outer frame and the blade shell, so The above-mentioned stepped surround corresponds to the fan blade shell, and there is a reverse stepped structure at the bottom of the fan blade shell that can be nested with the stepped surround of the outer frame. the 4. The dust-proof and oil-leakage-proof DC brushless cooling fan according to claim 1, characterized in that, the second dust-proof and oil-leakage structure is composed of the annular groove of the upper insulating sleeve and the annular convex strip of the fan blade , the annular protruding strip is matched with the annular groove correspondingly, and the annular protruding strip is embedded in the annular groove. the 5. The dust-proof and oil-leakage-proof DC brushless cooling fan according to claim 1, wherein the third dust-proof and oil-leakage structure is composed of an upper insulating sleeve with a retaining ring, and the shaft sleeve A baffle ring is arranged between the upper insulating sleeve and the hole diameter of the baffle ring is slightly larger than that of the shaft core to seal the space between the shaft core and the shaft sleeve. the 6. The dust-proof and oil-leakage-proof DC brushless cooling fan according to claim 1, wherein the bushing has upper and lower end surfaces and a cylindrical outer surface, and the cylindrical outer surface connects the upper and lower end surfaces , the upper and lower end surfaces are chamfered, and a spiral groove is provided on the end surface, while a linear groove along the axial direction is provided on the cylindrical outer surface. the 7. The dust-proof and oil-leakage-proof DC brushless cooling fan according to claim 6, characterized in that, a first annular concave hole is provided on the upper end surface of the shaft sleeve, and the first annular concave hole is connected with the central shaft hole connected and coaxial. the 8. The dust-proof and oil-leakage-proof DC brushless cooling fan according to claim 6, characterized in that, a second annular concave hole is provided on the lower end surface of the bushing, and the second annular concave hole is connected with the center shaft hole , and coaxial. the 9. The dust-proof and oil-leakage-proof DC brushless cooling fan according to claim 2, characterized in that, a cross spring washer is arranged between the lower end surface of the bushing and the spring washer, and the cross spring washer The inner hole of the sheet is smaller than the outer diameter of the shaft core. the 10. The dust-proof and oil-leakage-proof DC brushless cooling fan according to claim 1, characterized in that grooves and/or ribs are provided on the inner wall of the tube in the outer frame, and the grooves and ribs are along the The axial direction of the tube in the outer frame is set. the

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