CN113007110B

CN113007110B - Oil-retaining pressure-resistant fan

Info

Publication number: CN113007110B
Application number: CN202110346574.4A
Authority: CN
Inventors: 况湾湾; 刘韬; 熊凯; 祖义会
Original assignee: Wuxi Ruiqin Technology Co Ltd
Current assignee: Wuxi Ruiqin Technology Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-12-09
Anticipated expiration: 2041-03-31
Also published as: WO2022205892A1; CN113007110A

Abstract

The invention discloses an oil-retaining pressure-resistant fan which comprises a base, a supporting seat, supporting columns, a rotor fan blade assembly and a stator assembly, wherein the supporting seat is arranged on the base; the bearing of the stator assembly is fixed on the base through a sleeve and a pressure ring, and the supporting seat is fixed on the pressure ring and protrudes out of the base; the supporting column and the supporting seat are integrally formed or fastened and connected to the supporting seat, the supporting column penetrates through the bearing at intervals, an axis which is of a hollow structure is convexly arranged at the center of a motor shell of the rotor fan blade assembly, the axis rotatably penetrates through the supporting column and the bearing, and one end, far away from the supporting seat, of the supporting column protrudes out of the motor shell. The invention forms a support compensation structure through the support seat and the support columns which are protruded up and down, can form effective protection when being pressed, avoids the fan from being pressed to incline or sink integrally, and simultaneously, the press ring and the support seat are fixedly connected in a sealing way to form a closed structure, thereby forming a closed oil circuit structure, preventing the lubricating oil from losing and prolonging the service life of the fan.

Description

Oil-retaining pressure-resistant fan

Technical Field

The present disclosure relates to cooling fans, and particularly to an oil-retaining and pressure-resistant cooling fan for electronic products.

Background

Electronic products (such as desktop computers, notebook computers, tablet computers, etc.) are equipped with heat dissipation fans to achieve heat dissipation. The existing market demands electronic products to be increasingly light and thin, the problem brought by this is that the strength of the whole chassis is weakened, and the space for installing the cooling fan in the electronic product is limited, and the distance between the cooling fan and the keyboard or the panel of the electronic product is greatly reduced, so when the keyboard or/and the panel and other parts are pressed and deformed, the cooling fan is often directly pressed, the main shaft of the fan is easy to incline or wholly sink, and the interference between the fan blades and the fan frame is caused to generate abnormal sound, which causes customer complaints.

In the prior art, a support column 110 'is added in the fan flow channel, as shown in fig. 1, and the material of the fan frame is changed to improve the strength of the body of the fan 100'. However, this approach has the following disadvantages:

1. the supporting columns 110' are positioned in the fan flow channel, so that the change of the flow velocity distribution of the air outlet and the internal turbulence are easily caused, and the noise is increased;

2. the air inlet area A of the upper cover of the fan cannot be supported because of belonging to a fan blade rotating area, so that the fan is still easily damaged when the area is pressed;

3. the existing heat dissipation fan 100' lacks a perfect oil retention structure, and the lubricating oil coated between the bearing and the axis gradually runs off upwards along the axis in the running process of the fan wheel, so that the problem of difficult oil retention exists, and the service life of the heat dissipation fan is shortened.

Therefore, it is necessary to provide a heat dissipation fan with a strong pressure-bearing capability and an enhanced oil-retaining structure to solve the above problems.

Disclosure of Invention

The invention aims to provide an oil-retaining pressure-resistant fan which is high in pressure-bearing capacity and enhanced in oil-retaining structure.

In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides an oil-retaining pressure-resistant fan, which is suitable for electronic products and comprises a base, a supporting seat, a supporting column, a rotor fan blade component and a stator component; the stator assembly comprises a pressing ring, a bearing and a sleeve, the sleeve is fixed on the base, and the bearing is fixed in the sleeve through the pressing ring; the supporting seat is fixed on the pressing ring and protrudes out of the base; the supporting columns and the supporting seat are integrally formed or fixedly connected to the supporting seat, and the supporting columns penetrate through the bearing at intervals; rotor flabellum subassembly includes a motor housing, the protruding axle center that is hollow structure that is equipped with of center department of motor housing, the axle center rotatably wears to locate the support column with between the bearing, just keeping away from of support column the one end protrusion of supporting seat in outside the motor housing.

Preferably, the oil-retaining pressure-resistant fan further comprises a first gasket and a second gasket, the first gasket is pressed between the shaft center and the support seat, and the second gasket is pressed between the bearing and the sleeve.

Preferably, the sleeve includes a bottom and a wall connected to an edge of the bottom, a first through hole is formed in the bottom, the first through hole penetrates through the axis, and the second gasket is pressed between the bearing and the bottom.

Preferably, the sleeve is in clearance fit with the shaft core, the clearance between the sleeve and the shaft core is less than or equal to 0.03mm, and a section of the shaft core corresponding to the clearance between the sleeve and the motor shell is coated with an oleophobic agent.

Preferably, the motor housing and the shaft center are welded or injection-molded, and the outer surface of the shaft center is of a smooth structure.

Preferably, the base is provided with a first mounting hole corresponding to the outer diameter of the sleeve, the sleeve is fixed in the first mounting hole, the pressing ring is provided with a second mounting hole corresponding to the outer diameter of the supporting seat, and the supporting seat is mounted in the second mounting hole and in interference fit with the pressing ring.

Preferably, the lower end of the bearing is provided with a shoulder, and the lower end of the bearing is accommodated in the press ring and abuts against the top of the press ring.

Preferably, the stator assembly further includes a coil, the outer wall of the sleeve has a mounting portion protruding outward, and the coil is sleeved outside the sleeve and abuts against the mounting portion.

Preferably, the motor housing includes a top wall and a side wall connected to an edge of the top wall, a protruding direction of the axis is the same as a protruding direction of the side wall, and the through hole on the axis penetrates through the top wall.

Preferably, the rotor blade assembly further comprises a blade and a magnet piece, the magnet piece is fixed on the inner surface of the side wall, and the blade is mounted on the outer surface of the side wall.

Compared with the prior art, the oil-retaining pressure-resistant fan has the advantages that the motor shell is additionally provided with the shaft center in a hollow structure, the bearing is fixed on the base through the matching of the single sleeve and the pressing ring, the shaft center is rotatably connected into the bearing, the bearing is installed by the single sleeve, so that the installation structure is simplified, the weight of the rotor blade assembly is reduced due to the fixed arrangement of the bearing, and the process is stable and reliable; secondly, the compression ring and the supporting seat are fixedly connected in a sealing manner to form a sealing structure, so that a sealing oil path structure is formed, the lubricating oil is prevented from being lost, the low friction resistance value and the high reliability are achieved, and the service life of the oil-retaining pressure-resistant fan is prolonged; moreover, the supporting seat is fixed on the compression ring and protrudes out of the base, the supporting column penetrates through the axis and protrudes out of the motor shell, so that the supporting compensation structures are added in the vertical direction of the oil-retaining pressure-resistant fan, when the oil-retaining pressure-resistant fan is pressed, external force acts on the protruding section of the supporting seat and the protruding section of the supporting column firstly, and therefore effective support is formed, the bearing capacity of the oil-retaining pressure-resistant fan is improved, and the oil-retaining pressure-resistant fan is prevented from being pressed to incline or sink integrally; finally, because the support compensation structure in the vertical direction is arranged, the blade height of the fan blade can be increased, the running clearance is reduced, the large-diameter fan blade design and the small running clearance design of the ultrathin fan are realized, the performance of the fan is improved, and the integral heat dissipation capacity of the oil-retaining pressure-resistant fan is improved.

Drawings

Fig. 1 is a schematic structural diagram of a conventional heat dissipation fan with support pillars.

FIG. 2 is a schematic view of the oil-retaining pressure-resistant fan of the present invention.

Fig. 3 is a schematic view of the structure of fig. 2 from another angle.

Fig. 4 is an exploded view of fig. 2.

Fig. 5 is an exploded view of the stator assembly of the present invention with the coils removed.

Fig. 6 is a schematic view of the motor housing of fig. 4 at another angle.

Fig. 7 is an enlarged schematic view of the sleeve of fig. 4.

Fig. 8 is a sectional view of the oil-retaining pressure-resistant fan of the present invention with the coil removed.

Fig. 9 is a partially enlarged schematic view of fig. 8.

Fig. 10 is a partial sectional view of the oil-retaining pressure-resistant fan of the present invention with its fan blades removed.

Detailed Description

Embodiments of the present invention will now be described with reference to the drawings, wherein like element numerals represent like elements. The oil-retaining and pressure-resistant fan 100 provided by the invention is mainly suitable for electronic products (such as notebook computers, etc.), but is not limited thereto.

Referring to fig. 2-5, the oil-retaining pressure-resistant fan 100 of the present invention includes a base 110, a support base 120, a support pillar 130, a stator assembly 140, and a rotor blade assembly 150. The supporting base 120 is fixed on the base 110 and protrudes out of the base 110, and the supporting column 130 and the supporting base 120 are integrally formed or in interference fit. The stator assembly 140 includes a pressing ring 141, a bearing 142, and a sleeve 143, the pressing ring 141 is fixed outside the support base 120, the pressing ring 141 and the support base 120 are in interference fit, the bearing 142 is mounted on the pressing ring 141, and the sleeve 143 is mounted outside the bearing 142 and the pressing ring 141, that is, in the present invention, only one sleeve 143 is used to mount the bearing 142, and a single sleeve can simplify the structure of the oil-retaining pressure-resistant fan 100, and the bearing 142 is fixed on the base 110, so that the weight of the rotor blade assembly 150 can be reduced. The rotor blade assembly 150 includes a motor housing 151, a shaft 152 with a hollow structure is protruded from the center of the motor housing 151, the shaft 152 rotatably penetrates the supporting post 130, and one end of the supporting post 130 far away from the supporting base 120 protrudes out of the motor housing 151 to form a protruding section 130a (see fig. 9), and the shaft 152 is in clearance fit with the bearing 142 and the sleeve 143. In the invention, the supporting seat 120 and the supporting column 130 are matched and respectively protrude out of the upper end and the lower end of the oil-retaining pressure-resistant fan 100, so that when the oil-retaining pressure-resistant fan 100 is pressed, the oil-retaining pressure-resistant fan acts on the protruding ends of the supporting seat 120 and the supporting column 130 firstly, thereby improving the pressure-bearing capacity and preventing the oil-retaining pressure-resistant fan 100 from being pressed to incline or sink integrally; and through the interference fit between clamping ring 141 and supporting seat 120, make to be sealing connection between the two, make the below of oil-retaining resistance to compression fan 100 form airtight structure to form closed oil circuit structure, prevent that lubricating oil from running off, accomplish low friction resistance and high reliability, increase the life of oil-retaining resistance to compression fan 100.

Furthermore, the oil-retaining pressure-resistant fan 100 further includes a first gasket 160 and a second gasket 170, the first gasket 160 is pressed between the shaft 152 and the supporting seat 120, and the outer diameter of the first gasket 160 corresponds to the outer diameter of the shaft 152, and the outer diameter of the first gasket 160 is preferably slightly larger than the outer diameter of the supporting seat 120 (see fig. 9), so that the first gasket 160 is pressed against the connecting position between the supporting seat 120 and the pressing ring 141, and the sealing performance between the supporting seat 120 and the pressing ring 141 can be further enhanced, that is, the sealing performance of the closed oil path under the oil-retaining pressure-resistant fan 100 is enhanced, and the lubricant oil loss is better prevented. Of course, the outer diameter of the first gasket 160 may be set to correspond to the outer diameter larger than the support seat 120. The second gasket 170 is pressed between the bearing 142 and the sleeve 143, the outer diameter of the second gasket 170 corresponds to the inner diameter of the sleeve 143, and the second gasket 170 is in clearance fit with the shaft 152.

Referring to fig. 4-5 and 7-10, the sleeve 143 includes a bottom 1431 and a wall 1432 connected to an edge of the bottom 1431, and the bottom 1431 is provided with a first through hole 1433. Correspondingly, the second gasket 170 is provided with a second through hole 171, the aperture of the second through hole 171 corresponds to the aperture of the first through hole 1433, and the second gasket 170 is pressed between the cylinder bottom 1431 and the bearing 142. The shaft 152 is rotatably disposed in the first through hole 1433 and the second through hole 171, and the gaps L between the shaft 152 and the sleeve 143 and the second gasket 170 are less than or equal to 0.03mm. In the present invention, since the clearance L between the shaft 152 and the sleeve 143 and the second gasket 170 is small, the lubricating oil can be prevented from flowing upward along the clearance L, thereby achieving the effect of oil retention.

Furthermore, after the sleeve 143 is installed, a certain distance is left between it and a top wall 1511 (see fig. 9, detailed description) of the motor housing 151, and a section 152a of the shaft core 152 corresponding to the distance is coated with an oil repellent agent, so as to further prevent the lubricating oil from flowing upwards and enhance the oil retention effect.

Referring to fig. 3-4 and 7-10, in the present invention, a first mounting hole 111 corresponding to the outer diameter of the sleeve 143 is formed on the base 110, and the sleeve 143 is fixed in the first mounting hole 111. Meanwhile, the inner diameter of the sleeve 143 corresponds to the outer diameter of the pressing ring 141, the pressing ring 141 is sleeved in the sleeve 143 and fixedly connected with the sleeve 143, and the bearing 142 is fixed by the matching of the pressing ring 141 and the sleeve 143. In addition, a second mounting hole 1411 corresponding to the outer diameter of the supporting seat 120 is formed in the pressing ring 141, the supporting seat 120 is mounted in the second mounting hole 1411 and is in interference fit with the pressing ring 141, and a protruding section 120a (shown in fig. 9) protruding out of the bottom surface of the base 110 is formed at the lower end of the supporting seat 120, so that the protruding section 120a of the supporting seat 120 forms a compensation supporting structure below the oil-retaining pressure-resistant fan 100.

In the present invention, the protruded section 130a of the supporting pillar 130 forms a compensation supporting structure above the oil-retaining pressure-resistant fan 100, and the protruded section 120a of the supporting seat 120 forms a compensation supporting structure below the oil-retaining pressure-resistant fan 100, so that when the oil-retaining pressure-resistant fan 100 is subjected to an external force, the protruded section 120a of the supporting seat 120 and the protruded section 130a of the supporting pillar 130 are acted on first, thereby reducing the probability that the base 110 and the motor housing 151 are crushed.

Referring to fig. 4-5 and 7-10 again, the bearing 142 has a body 1421 and a mounting end 1422, the mounting end 1422 is protruded from the lower end of the body 1421 and has an outer diameter smaller than that of the body 1421, so that a shoulder 1423 is formed between the body 1421 and the mounting end 1422, the outer diameter of the mounting end 1422 is slightly smaller than the inner diameter of the pressing ring 141, and the height of the mounting end 1422 is slightly smaller than that of the pressing ring 141. During installation, the mounting end 1422 of the bearing 142 is received in the press ring 141 and the shoulder 1423 thereof abuts against the top of the press ring 141, as shown in fig. 9. The main body 1421 of the bearing 142 and the pressing ring 141 are mounted together in the sleeve 143, and the second gasket 170 is pressed between the main body 1421 and the bottom 1431 of the sleeve 143.

More preferably, the bearing 142 of the present invention is formed by sintering powder, and the powder gap can effectively prevent the lubricant from flowing away, thereby further enhancing the oil retention structure.

Referring to fig. 7 and 10, the stator assembly 140 further includes a coil 144, and the coil 144 is mounted on an outer wall of the sleeve 143 and electrically connected to a circuit board mounted on the base 110. More specifically, the outer wall of the sleeve 143 has a mounting portion 1434 protruding outward, the coil 144 is sleeved outside the sleeve 143 and abuts against the mounting portion 1434, and the structure and the mounting manner of the coil 144 are conventional in the art and will not be described again.

With continued reference to fig. 4-6 and 8-10, the motor housing 151 includes a top wall 1511 and a side wall 1512 connected to an edge of the top wall 1511, a protruding direction of the shaft 152 is the same as the protruding direction of the side wall 1512, and a through hole on the shaft 152 penetrates through the top wall 1511, and the motor housing 151 and the shaft 152 are welded or injection molded, while ensuring that an outer surface of the shaft 152 is smooth.

Furthermore, the rotor blade assembly 150 further includes a blade 153 and a magnet 154, the magnet 154 is fixed on the inner surface of the sidewall 1512, the blade 153 is mounted on the outer surface of the sidewall 1512, and the mounting manners of the blade 153 and the magnet 154 are conventional in the art. In the present invention, since the bearing 142 is fixed to the base 110, the weight of the rotor blade assembly 150 is greatly reduced and the process is simplified compared to the conventional arrangement.

In summary, according to the oil-retaining pressure-resistant fan 100 of the present invention, firstly, the motor housing 151 is additionally provided with the shaft center 152 having a hollow structure, and the bearing 142 is fixed on the base 110 by the single sleeve 143 matching with the pressing ring 141, the shaft center 152 is rotatably connected in the bearing 142, the single sleeve 143 is used for installing the bearing 142, so that the installation structure is simplified, and the fixed arrangement of the bearing 142 reduces the weight of the rotor blade assembly 150, and the process is stable and reliable; secondly, the pressing ring 141 and the supporting seat 120 are fixedly connected in a sealing manner to form a closed structure, so that a closed oil path structure is formed, the lubricating oil is prevented from running off, the low friction resistance value and the high reliability are realized, and the service life of the oil-retaining pressure-resistant fan 100 is prolonged; furthermore, the supporting seat 120 is fixed to the pressing ring 141 and protrudes out of the base 110, and the supporting pillar 130 penetrates through the shaft center 152 and protrudes out of the motor housing 151, so that a supporting compensation structure is added in the vertical direction of the oil-retaining pressure-resistant fan 100, when the oil-retaining pressure-resistant fan 100 is pressed, an external force acts on the protruding section of the supporting seat 120 and the protruding section of the supporting pillar 130 first, thereby forming an effective support, improving the pressure-bearing capacity of the oil-retaining pressure-resistant fan 100, and preventing the oil-retaining pressure-resistant fan 100 from being pressed to incline or sink as a whole; finally, due to the up-down supporting compensation structure, the blade height of the fan blade 153 can be increased, the running clearance can be reduced, the large-diameter fan blade design and the small running clearance design of the ultrathin fan can be realized, the fan performance can be improved, and the overall heat dissipation capacity of the oil-retaining pressure-resistant fan 100 can be improved.

The structure and arrangement of the other parts related to the oil-retaining and pressure-resistant fan 100 are well known to those skilled in the art, and will not be described in detail herein.

The above disclosure is only for the preferred embodiment of the present invention, and it should be understood that the present invention is not limited thereto, and the invention is not limited to the above disclosure.

Claims

1. The utility model provides a protect oily resistance to compression fan, is applicable to the electronic product, its characterized in that includes:

the base is provided with a first mounting hole;

the stator assembly comprises a pressing ring, a bearing and a sleeve, wherein the sleeve comprises a sleeve bottom and a sleeve wall connected to the edge of the sleeve bottom, a first through hole is formed in the sleeve bottom, the outer diameter of the sleeve corresponds to the inner diameter of the first mounting hole, the inner diameter of the sleeve corresponds to the outer diameter of the pressing ring, the sleeve is fixed in the first mounting hole, the opening end of the sleeve faces the outside of the base, the sleeve bottom is located in the base, the pressing ring is sleeved in the sleeve and fixedly connected with the sleeve, and the bearing is fixed in the sleeve through the pressing ring;

the supporting seat is hermetically fixed on the pressure ring and protrudes out of the base;

the supporting columns and the supporting seat are integrally formed or fixedly connected to the supporting seat, and the supporting columns are arranged in the bearing and the first through holes at intervals in a penetrating mode;

rotor flabellum subassembly, it includes a motor housing, the protruding axle center that is hollow structure that is equipped with of center department of motor housing, the outward appearance of axle center is smooth structure, the axle center rotatably wears to locate the support column with between the bearing, just keeping away from of support column the one end protrusion of supporting seat in outside the motor housing.

2. The oil-retaining pressure-resistant fan according to claim 1, further comprising a first spacer and a second spacer, wherein the first spacer is pressed between the shaft and the support seat, and the second spacer is pressed between the top of the bearing and the bottom of the sleeve.

3. The oil-retaining pressure-resistant fan according to claim 2, wherein the first through hole is formed through the shaft center, and the second gasket is pressed between the bearing and the cylinder bottom.

4. The oil-retaining pressure-resistant fan according to any one of claims 1 to 3, wherein the sleeve is in clearance fit with the shaft core, the clearance between the sleeve and the shaft core is less than or equal to 0.03mm, and a section of the shaft core corresponding to the clearance between the sleeve and the motor housing is coated with an oleophobic agent.

5. The oil-retaining pressure-resistant fan according to claim 1, wherein the motor housing is welded or injection-molded to the hub.

6. The oil-retaining pressure-resistant fan according to claim 1, wherein the pressing ring is provided with a second mounting hole corresponding to the outer diameter of the supporting seat, and the supporting seat is mounted in the second mounting hole and is in interference fit with the pressing ring.

7. The oil-retaining pressure-resistant fan according to claim 1 or 6, wherein the lower end of the bearing is provided with a shoulder portion, and the lower end of the bearing is received in the pressure ring so that the shoulder portion abuts against the top of the pressure ring.

8. The oil-preserving and pressure-resisting fan as claimed in any one of claims 1 to 3, wherein the stator assembly further includes a coil, the outer wall of the sleeve has a mounting portion formed to protrude outward, and the coil is sleeved outside the sleeve and abuts against the mounting portion.

9. The oil-retaining pressure-resistant fan according to claim 1, wherein the motor housing includes a top wall and side walls connected to edges of the top wall, the protruding direction of the shaft center is the same as the protruding direction of the side walls, and the through hole in the shaft center penetrates through the top wall.

10. The oil and pressure resistant fan of claim 9 wherein the rotor blade assembly further comprises blades and magnet pieces, the magnet pieces being secured to the inner surface of the side wall, the blades being mounted to the outer surface of the side wall.