CN210068513U - Novel small-size fan and external rotor brushless motor of waterproof dustproof construction - Google Patents
Novel small-size fan and external rotor brushless motor of waterproof dustproof construction Download PDFInfo
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- CN210068513U CN210068513U CN201920504559.6U CN201920504559U CN210068513U CN 210068513 U CN210068513 U CN 210068513U CN 201920504559 U CN201920504559 U CN 201920504559U CN 210068513 U CN210068513 U CN 210068513U
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- ball bearing
- brushless motor
- fan
- axle core
- rotor brushless
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Abstract
The utility model discloses a novel waterproof dustproof construction's small-size fan and external rotor brushless motor, including the flabellum, be equipped with the axle core in the flabellum, be equipped with the motor shell in the flabellum, the inside magnetic stripe that is equipped with of motor shell, ball bearing before having cup jointed on the axle core, the magnetic stripe cup joints in the frame, buckle and gasket have been cup jointed on the axle core, be equipped with back ball bearing and preceding ball bearing on the axle core, the pipe in the copper has been cup jointed on back ball bearing and the preceding ball bearing, the cylindricality spring has been cup jointed on the axle core, this novel waterproof dustproof fan structural design's fan, has splendid water-proof effects, can be long-term in humid local use, also can use in the trickle environment, can also whole put into the aquatic use, all do not influence its performance, also have splendid dust-proof effects, can satisfy IP 68.
Description
Technical Field
The utility model relates to a radiator fan technical field specifically is a novel waterproof dustproof construction's small-size fan and external rotor brushless motor.
Background
In the existing domestic waterproof and dustproof design of the cooling fan, two modes are mainly used for waterproof and dustproof treatment, wherein the first mode is that a thinner protective layer is used for protecting a stator and isolating water and dust, such as vacuum film coating, varnish dipping process and the like; the second is to utilize a thicker curing adhesive to wrap the stator, so as to isolate the stator from water and dust, such as pouring adhesive process, low-temperature injection molding process, etc., but the small fan and the outer rotor brushless motor with the novel waterproof and dustproof structure in the prior art still have the following defects.
The first protective layer is thin, for example, the thickness of a vacuum coating is about 20um, and the paint is dipped and cleaned by 20-50um, so that sand holes, pin holes and broken holes caused by process scratch are easy to appear, and the waterproof failure is caused, so that the first mode can only achieve the protection effect (moisture and water resistance, and the soaking water test cannot be passed) of IP57 at most.
In the second mode, the main flow protective fixed telephone glue is utilized, and the main flow protective fixed telephone glue comprises three types: silicone rubber, epoxy resin glue, low temperature injection molding glue. The silicone rubber has the advantages of low hardness (Shore 20-60D), good cold and hot impact resistance, insufficient hardness, poor formability, more air holes, poor adhesiveness and easy delamination; the epoxy resin adhesive is the mainstream at present, and has the advantages of high hardness (Shore 80-90D), good formability, high density, large adhesive force, drop resistance, external force impact resistance and excellent waterproof performance, and has the defect of poor cold and hot impact resistance. The low-temperature injection molding glue is a simplified process based on an epoxy resin glue encapsulating process, and has the unique advantages of simple process, low cost, poor cold and hot impact resistance, poor waterproof performance (a part of a stator with process defects cannot be completely wrapped), incapability of performing saline soaking test, incapability of performing deep water test and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel waterproof dustproof construction's small-size fan and external rotor brushless motor to solve small-size fan and resist the poor problem of cold and hot impact ability.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel waterproof dustproof construction's small-size fan and external rotor brushless motor, includes the flabellum, be equipped with the axle core in the flabellum, be equipped with the motor shell in the flabellum, the inside magnetic stripe that is equipped with of motor shell, ball bearing before having cup jointed on the axle core, the magnetic stripe cup joints in the frame, buckle and gasket have been cup jointed on the axle core, be equipped with back ball bearing and preceding ball bearing on the axle core, copper well pipe has been cup jointed on back ball bearing and the preceding ball bearing.
Preferably, the shaft core is sleeved with a cylindrical spring, the upper end of the cylindrical spring is arranged at the lower end of the front ball bearing, and the lower end of the cylindrical spring is arranged at the upper end of the rear ball bearing.
Preferably, an insulating cover is arranged in the outer frame, a silicon steel sheet is arranged on the insulating cover, an insulating base is arranged in the silicon steel sheet, and an enameled wire is arranged between the insulating base and the silicon steel sheet.
Preferably, the lower end of the insulating base is provided with a PCB assembly, the lower end of the PCB assembly is provided with filling curing glue, and the lower end of the filling curing glue is provided with a bottom cover.
Preferably, the copper-pipe is fixedly connected in a middle-pipe fixing base on the inner side of the wall of the sealing cavity, an outer frame rib is arranged on the wall of the sealing cavity, and a wire guide groove is arranged in the outer frame rib.
Preferably, a diversion reinforcing rib and a bottom cover positioning fixing groove are arranged in the wall of the sealing cavity, and the bottom cover is rotatably connected in the bottom cover positioning fixing groove.
Preferably, the filling and curing glue is made of epoxy resin glue, silicone rubber, injection molding glue or other similar waterproof pouring sealants.
Compared with the prior art, the beneficial effects of the utility model are that:
1. this novel waterproof dustproof fan structural design's fan has splendid water-proof effects, can use in moist place for a long time, also can use at the trickle environment, can also whole put into the aquatic and use, does not influence its performance, also has splendid dustproof effects, can satisfy IP68 standard requirement.
2. This novel waterproof dustproof fan has following some beneficial effects:
1) the rotor and the stator are completely isolated by the injection molding shell of the outer frame, so that series problems caused by contact between the curing adhesive and the rotor (fan blade assembly or motor shell assembly) are prevented, for example, the curing adhesive is stuck and clamped with the rotor due to no drying of the adhesive, the curing adhesive is poor in material soft forming and easy to deform, interference with the rotor is caused, poor collision is caused, and the like; on the other hand, the defects of the curing adhesive are prevented from causing poor performance, such as the curing adhesive is caused by sand holes to cause unqualified waterproof effect, the adhesive force of the curing adhesive is not enough to cause layering cracking and stator separation, and finally the curing adhesive falls off to cause waterproof and dustproof failure and is interfered with a rotor to be blocked.
2) The opening of the sealing cavity is arranged on the bottom surface of the outer frame, the operation difficulty of pouring sealant is reduced, the pouring sealing process is simplified, a sealant cover is not required to be mounted or dismounted, a stator is not required to be injection molded, the whole process flow is more concise and smooth, and the production efficiency can be improved by more than 60%.
3) The outer frame and the copper-in-pipe structure are combined into a semi-closed sealing cavity, so that the outer frame injection molding process is simplified, the injection molding difficulty is reduced, and the molding quality is improved. The idea that the outer frame and the middle pipe are integrally formed by plastic injection is proposed in the prior art, the actual die sinking finds that the whole die flow is very long, the formed cavity is seriously deformed, the verticality, the concentricity and the planeness can not meet the design requirements, and the top end of the middle pipe is seriously shrunk, so that the precision requirement of +/-0.01mm can not be met fundamentally.
4) The copper-in-tube heat conduction effect is good, the heat dissipation effect on the stator of the fan is good, particularly, when the whole stator is sealed by the curing adhesive, the introduction effect of the curing adhesive is poor, the heat generated inside the stator cannot be timely led out, the poor burning of the PCB assembly caused by the overhigh temperature inside the stator is easily caused, and the poor burning of the PCB assembly is changed into the copper-in-tube heat conduction effect, so that the poor burning can be effectively avoided.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of the overall structure of the present invention;
FIG. 3 is an exploded view of the waterproof and dustproof fan assembly of the present invention;
FIG. 4 is a schematic view of the waterproof and dustproof patent protection part of the present invention;
fig. 5 is a detailed illustration of the waterproof and dustproof patent protection part of the present invention.
In the figure: 11 fan blades, 12 magnetic strips, 13 motor shells, 14 shaft cores, 21 insulating covers, 22 silicon steel sheets, 23 insulating bases, 24 enameled wires, 25 PCB assembly, 31 outer frames, 32 copper-in-pipe, 33 bottom covers, 34 gaskets, 35 retaining rings, 36 rear ball bearings, 37 cylindrical springs, 38 front ball bearings, 39 filling curing glue, 311 wire grooves, 312 bottom cover positioning fixing grooves, 313 flow guide reinforcing ribs, 314-in-pipe fixing bases, 315 outer frame ribs and 316 sealing cavity walls.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the present invention provides a technical solution: a novel small fan and outer rotor brushless motor with waterproof and dustproof structure comprises fan blades 11, wherein a shaft core 14 is arranged in the fan blades 11, a motor shell 13 is arranged in the fan blades 11, a magnetic strip 12 is arranged in the motor shell 13, a front ball bearing 38 is sleeved on the shaft core 14, the magnetic strip 12 is sleeved in an outer frame 31, the outer frame 31 plays a role in supporting and fixing a stator assembly and the fan blade assembly, wherein the stator assembly comprises a plastic-coated wire frame (consisting of an insulating base 23, an insulating cover 21 and a plurality of layers of silicon steel sheets 22 which are stacked together), an enameled wire 24, a PCB assembly 25 (a product driving circuit board) and a conducting wire, the stator assembly is fixed on a copper-in-tube in the center of the outer frame and plays a role in driving the rotation of the fan blades, the fan blade assembly comprises the fan blades 11, the motor shell 13, the magnetic strip 12 and other parts (the outer rotor brushless motor has no fan blades 11, only the, the stator is characterized in that the fan blades 11 or the motor are driven to rotate, the outer frame 31 is bulged and forms a semi-closed sealed cavity with the copper-in-pipe 32, the opening of the sealed cavity is formed in the bottom surface of the outer frame 31, the stator is installed from the opening surface of the bottom of the outer frame 31, filling curing glue 39 such as soft silica gel is filled in the sealed cavity, the stator is fixed and completely sealed in the filling curing glue 39, and finally the bottom cover 33 is covered to achieve the waterproof and dustproof effects.
The shaft core 14 is sleeved with a retaining ring 35 and a gasket 34, the shaft core 14 is provided with a rear ball bearing 36 and a front ball bearing 38, the rear ball bearing 36 and the front ball bearing 38 are sleeved with a copper-in-pipe 32, and the outer frame 31, the copper-in-pipe 32 and the bottom cover 33 form a fully-closed cavity for fixing the stator assembly and preventing the stator assembly from contacting with the outside.
Referring to fig. 2 and 3, a cylindrical spring 37 is sleeved on the shaft core 14, an upper end of the cylindrical spring 37 is disposed at a lower end of the front ball bearing 38, and a lower end of the cylindrical spring 37 is disposed at an upper end of the rear ball bearing 36.
Referring to fig. 2 and 3, an insulating cover 21 is disposed in the outer frame 31, a silicon steel sheet 22 is disposed on the insulating cover 21, an insulating base 23 is disposed in the silicon steel sheet 22, and an enamel wire 24 is disposed between the insulating base 23 and the silicon steel sheet 22.
Referring to fig. 1, 2 and 3, the lower end of the insulating base 23 is provided with a PCB assembly 25, the lower end of the PCB assembly 25 is provided with a filling curing adhesive 39, the filling curing adhesive 39 further fixes and protects the stator, so as to completely prevent water, dust and the like from contacting the stator assembly, thereby achieving a totally enclosed effect, and the lower end of the filling curing adhesive 39 is provided with a bottom cover 33.
Referring to fig. 5, the copper middle tube 32 is fixedly connected to the inner side of the sealing cavity wall 316 in the middle tube fixing base 314, the sealing cavity wall 316 is used to isolate the stator from the fan blade assembly, isolate the stator from the outside, and prevent the filling curing adhesive from flowing out, the middle tube fixing base 314 is used to fix the copper middle tube 32, prevent the copper middle tube 32 from loosening or exceeding the verticality, the heat dissipation effect of the copper middle tube 32 is better, the heat generated by the coil during the operation of the stator can be well conducted out, can effectively reduce the inside temperature rise of fan, avoid the fan because of the stator fully enclosed state under the heat dissipation not enough, the electronic component high temperature that appears, the impaired or inefficacy risk of component that leads to is equipped with frame rib 315 on the sealed chamber wall 316, and frame rib 315 is used for connecting four angles of frame and sealed chamber position, is equipped with wire casing 311 in the frame rib 315, and wire casing 311 is used for the wire to draw forth and is qualified for the next round of competitions.
Referring to fig. 5, a flow guide reinforcing rib 313 and a bottom cover positioning fixing groove 312 are arranged in the sealing cavity wall 316, the flow guide reinforcing rib 313 increases the strength of the sealing cavity wall, prevents deformation during injection molding, increases a glue flow channel during injection molding, improves the risk that the glue flow channel is too long and is easy to cause poor injection molding, the bottom cover 33 is rotatably connected in the bottom cover positioning fixing groove 312, and the fixing groove 312 is used for fixing the bottom cover, clamping the bottom cover to prevent the bottom cover from loosening and playing a role in assisting water and dust prevention.
Referring to fig. 2 and 3, the filling and curing glue 39 is made of epoxy resin glue, silicone rubber, injection molding glue or other similar waterproof potting glue.
The utility model discloses when concrete implementation: the outer frame 31 and the copper-in-pipe 32 are structurally combined into a semi-closed sealed cavity, the injection molding process of the outer frame 31 is simplified, the injection molding difficulty is reduced, the molding quality is improved, the filling curing adhesive 39 is used for further fixing and protecting the stator, water, dust and the like are completely prevented from contacting the stator assembly part, a fully-closed effect is achieved, a bottom cover 33 is arranged at the lower end of the filling curing adhesive 39, the outer frame 31, the copper-in-pipe 32 and the bottom cover 33 form a fully-closed cavity for fixing the stator assembly and preventing the stator assembly from contacting the outside, the copper-in-pipe 32 has a good heat conduction effect and has a good effect on the heat dissipation of the stator of a fan, the diversion reinforcing ribs 313 can increase the strength of the sealed cavity wall, prevent deformation during injection molding, increase a runner for glue running in the injection molding process, and improve the risk that the glue runner is easy to, the sealing chamber wall 316 isolates the stator from the fan blade assembly, so as to isolate the stator from the outside, prevent the filling curing adhesive 39 from flowing out, and enable the waterproof and dustproof effects of the small fan to be more effective.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a novel waterproof dustproof construction's small-size fan and outer rotor brushless motor, includes flabellum (11), its characterized in that: be equipped with axle core (14) in flabellum (11), be equipped with motor shell (13) in flabellum (11), motor shell (13) inside is equipped with magnetic stripe (12), preceding ball bearing (38) have been cup jointed on axle core (14), magnetic stripe (12) are cup jointed in frame (31), buckle (35) and gasket (34) have been cup jointed on axle core (14), be equipped with back ball bearing (36) and preceding ball bearing (38) on axle core (14), copper well pipe (32) have been cup jointed on back ball bearing (36) and preceding ball bearing (38).
2. The small-sized fan and outer rotor brushless motor with novel waterproof and dustproof structure as claimed in claim 1, wherein: the shaft core (14) is sleeved with a cylindrical spring (37), the upper end of the cylindrical spring (37) is arranged at the lower end of the front ball bearing (38), and the lower end of the cylindrical spring (37) is arranged at the upper end of the rear ball bearing (36).
3. The small-sized fan and outer rotor brushless motor with novel waterproof and dustproof structure as claimed in claim 1, wherein: be equipped with insulating lid (21) in frame (31), be equipped with silicon steel sheet (22) on insulating lid (21), be equipped with insulating seat (23) in silicon steel sheet (22), be equipped with enameled wire (24) between insulating seat (23) and silicon steel sheet (22).
4. The small-sized fan and outer rotor brushless motor with novel waterproof and dustproof structure as claimed in claim 3, wherein: the lower extreme of insulating seat (23) is equipped with PCB assemblage (25), the lower extreme of PCB assemblage (25) is equipped with and fills solidification and glue (39), the lower extreme of filling solidification and gluing (39) is equipped with bottom (33).
5. The small-sized fan and outer rotor brushless motor with novel waterproof and dustproof structure as claimed in claim 1, wherein: the copper-medium pipe (32) is fixedly connected in a medium pipe fixing base (314) on the inner side of a sealing cavity wall (316), an outer frame rib (315) is arranged on the sealing cavity wall (316), and a wire guide groove (311) is arranged in the outer frame rib (315).
6. The small-sized fan and outer rotor brushless motor with novel waterproof and dustproof structure as claimed in claim 5, wherein: the sealing cavity wall (316) is internally provided with a diversion reinforcing rib (313) and a bottom cover positioning fixing groove (312), and the bottom cover (33) is rotatably connected into the bottom cover positioning fixing groove (312).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504559.6U CN210068513U (en) | 2019-04-15 | 2019-04-15 | Novel small-size fan and external rotor brushless motor of waterproof dustproof construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504559.6U CN210068513U (en) | 2019-04-15 | 2019-04-15 | Novel small-size fan and external rotor brushless motor of waterproof dustproof construction |
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| Publication Number | Publication Date |
|---|---|
| CN210068513U true CN210068513U (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920504559.6U Active CN210068513U (en) | 2019-04-15 | 2019-04-15 | Novel small-size fan and external rotor brushless motor of waterproof dustproof construction |
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| CN (1) | CN210068513U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944818A (en) * | 2019-04-15 | 2019-06-28 | 东莞市海星和实业有限公司 | A kind of small-sized fans and outer rotor brushless motor of new waterproof dustproof construction |
-
2019
- 2019-04-15 CN CN201920504559.6U patent/CN210068513U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944818A (en) * | 2019-04-15 | 2019-06-28 | 东莞市海星和实业有限公司 | A kind of small-sized fans and outer rotor brushless motor of new waterproof dustproof construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| IP01 | Partial invalidation of patent right | ||
| IP01 | Partial invalidation of patent right |
Commission number: 5W124676 Conclusion of examination: Claims 1-2 and 5-6 of the utility model No. 201920504559.6 are declared invalid, and the patent is continued to be valid on the basis of claims 3-4 Decision date of declaring invalidation: 20220106 Decision number of declaring invalidation: 53110 Denomination of utility model: A new type of small fan with waterproof and dustproof structure and brushless motor with outer rotor Granted publication date: 20200214 Patentee: DONGGUAN HXH INDUSTRIAL Co.,Ltd. |