Fan mounting structure without stator coil holder applied to fan

Abstract

The utility model discloses a fan mounting structure without a stator coil holder applied to a fan, which relates to the field of fan design and comprises a support base, a PCBA (printed circuit board assembly), an iron core and fan blades. A positioning cylinder is formed in the middle of the inner side of the support base, and the PCBA board is installed on the positioning cylinder in a buckled mode. The iron core is tightly assembled on the positioning cylinder; an assembling groove is formed in the middle of the fan blade, and a rotating shaft is fixedly installed in the middle of the assembling groove and installed in the positioning cylinder in a rotating fit mode. A welding groove is formed in the support base and located in the side edge of the PCBA board, and the space between the PCBA board and the support base is filled with liquid silica gel through the welding groove in a potting mode. Compared with the prior art, according to the utility model, the iron core is painted to realize insulation, the yield and operability are improved, the PCBA board is installed in a buckling manner, the assembly is fast, the welding groove is arranged on the support base to facilitate the welding of the PCBA board, and the liquid silica gel is utilized to realize effective sealing and play a waterproof role.

Description

Technical Field

[0001] The utility model relates to the field of fan design, in particular to a fan installation structure for a fan without a stator wire frame. Background Art

[0002] A brushless motor mainly consists of a motor body, a rotor, a stator, and an electronic commutator, etc. Among them, the rotor usually uses a permanent magnet, and the stator is wound with coils. The role of the electronic commutator is to control the rotation direction and speed of the motor. The operating principle of the brushless motor is based on the principle of electromagnetic induction. When an electric current passes through the stator coil, a magnetic field will be generated, and this magnetic field will interact with the magnetic field of the rotor permanent magnet, thereby generating torque and causing the rotor to rotate. Since the rotor is a permanent magnet, the brushless motor does not require an external power source for excitation, which also makes its efficiency higher.

[0003] In the prior art (publication number: CN116146512A, publication date: May 23, 2023), a blow-suction integrated fan is disclosed, which can be used for two purposes, simultaneously meeting the functions of blowing and suction, efficiently utilizing fan materials and saving materials. It saves the space of the terminal product, thereby reducing the product volume. Being used for two purposes, that is, it can blow and suck, and is convenient to use.

[0004] However, in the above solution and common brushless motors on the market, the common practice is to wind copper wires around the stator core to form a wire frame, and then insert the end corners of the wire frame into the circuit board for soldering. This method has the problem of low assembly efficiency. At the same time, the circuit board is exposed and cannot effectively prevent water. When in use, a shell structure needs to be equipped to provide protection, resulting in a large volume of the motor. At the same time, there is no solution that combines the motor and the fan on the market. The traditional method of using the motor rotor to drive the fan blade has defects of large volume and uneven force. Therefore, it is necessary to design a fan installation structure for a fan without a stator wire frame. Summary of the Utility Model

[0005] The utility model provides a technical solution that can solve the above problems to overcome the above deficiencies.

[0006] A fan installation structure for a fan without a stator wire frame, including a bracket base, a PCBA board, an iron core, and a fan blade;

[0007] A positioning cylinder is formed in the middle of the inner side of the bracket base, and a first stepped groove is formed at the outer edge of the positioning cylinder. The PCBA board is snap-fitted and installed on the first stepped groove;

[0008] A second stepped groove is formed on the outer side of the positioning cylinder, and the iron core is tightly fitted and installed on the second stepped groove;

[0009] A conductive copper wire is wound around the iron core, and insulating paint is coated on both the conductive copper wire and the iron core. The conductive copper wire is electrically connected to the PCBA board.

[0010] An assembly groove is formed in the middle of the fan blade. A rotating shaft is fixedly installed in the middle of the assembly groove. The rotating shaft is rotatably fitted in the positioning cylinder. A permanent magnet ring is fixedly installed on the side wall of the assembly groove. The iron core is fitted in the permanent magnet ring with a clearance.

[0011] A welding groove is formed on the bracket base. The welding groove is located on the side of the PCBA board. Liquid silicone is filled in the gap between the PCBA board and the bracket base through the welding groove by potting.

[0012] Further: A circular hole is formed in the middle of the PCBA board. The PCBA board is fitted in the first stepped groove with a clearance through the circular hole.

[0013] Further: At least three buckles are formed on the outer side of the positioning cylinder. The PCBA board is snap-fitted on the first stepped groove through at least three buckles.

[0014] Further: A limiting block is formed on the outer side of the first stepped groove. A limiting groove is formed in the circular hole of the PCBA board. The limiting block is inserted into the limiting groove with a clearance.

[0015] Further: An inner hole is formed in the iron core. The inner hole is tightly fitted on the second stepped groove. A semi-circular groove is formed on the inner hole. A semi-circular convex edge is formed on the outer side of the positioning cylinder. The semi-circular convex edge is fitted in the semi-circular groove with a clearance.

[0016] Further: A number of tightly fitting bevels are formed on the outer side of the positioning cylinder. The number of tightly fitting bevels are circularly arranged with each other. The inner ring of the iron core is pressed and fitted on the second stepped groove through a number of tightly fitting bevels.

[0017] Further: The welding groove on the bracket base includes a UVW wire groove and an IF wire groove. The side of the PCBA board is inlaid with a UVW welding position and an IF welding position. The UVW wire groove is arranged on the outer side of the UVW welding position. The IF wire groove is arranged on the outer side of the IF welding position.

[0018] Further: The fan blade includes an inner ring, an outer ring and a number of arc-shaped edges. The assembly groove is integrally formed in the middle of the inner ring. The arc-shaped edges are integrally formed between the inner ring and the outer ring. The number of arc-shaped edges are separated from each other and circularly arranged.

[0019] Further: A ring-shaped cylinder is tightly fitted in the assembly groove. The permanent magnet ring is fixedly installed on the inner side wall of the ring-shaped cylinder.

[0020] Further: At least two rolling bearings are sleeved and installed on the rotating shaft, and the outer wall of the rolling bearing is installed in the positioning cylinder with a clearance fit.

[0021] The utility model is applied to a fan. In the common practice of the prior art, the stator core is always in the form of a wire frame. In order to facilitate the fixing of the PCBA board, the method of the utility model is to make insulation on the core by coating, which can improve the product yield and operability. Then, the PCBA board is fixed on the bracket base to achieve a more stable installation effect. Since the bracket base is generally sealed, after the PCBA board is installed, there is a problem that the UVW wire and the IF wire are inconvenient to weld. The utility model opens a welding groove on the bracket base, thereby facilitating the actual assembly and welding operations. After the assembly is completed, liquid silicone is poured into the gap between the PCBA board and the bracket base by using the welding groove. After the liquid silicone dries and solidifies, a stable sealing structure can be formed to achieve effective waterproofing and improve the service life of the motor.

[0022] The additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is the structural schematic diagram of the present utility model;

[0025] Figure 2 is the exploded structural schematic diagram of the present utility model;

[0026] Figure 3 is the structural schematic diagram after hiding the fan blade;

[0027] Figure 4 is the structural schematic diagram of another perspective of the present utility model;

[0028] Figure 5 is the exploded structural schematic diagram of another perspective of the present utility model.

[0029] As shown in the figure: 1. Bracket base; 2. PCBA board; 3. Iron core; 4. Fan blade; 4.1 Inner ring; 4.2 Outer ring; 4.3 Arc edge; 5. Positioning cylinder; 6. First stepped groove; 7. Second stepped groove; 8. Assembly groove; 9. Rotating shaft; 10. Permanent magnet ring; 11. Welding groove; 11.1 UVW wire groove; 11.2 IF wire groove; 12. Round hole; 13. Snap; 14. Limit block; 15. Limit groove; 16. Inner hole; 17. Semi-circular slot; 18. Semi-circular convex edge; 19. Tightly fitted bevel edge; 20. UVW welding position; 21. IF welding position; 22. Ring cylinder; 23. Rolling bearing. Detailed implementation mode

[0030] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments.

[0031] Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents the selected embodiments of the present invention.

[0032] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] Such asFigures 1-5 As shown in the figure, a fan installation structure for canceling the stator wire frame in a fan according to the present utility model includes a bracket base 1, a PCBA board 2, an iron core 3, and a fan blade 4. A positioning cylinder 5 is formed in the middle of the inner side of the bracket base 1. A first stepped groove 6 is formed at the outer edge of the positioning cylinder 5. The PCBA board 2 is snap-fitted and installed on the first stepped groove 6. A second stepped groove 7 is formed on the outer side of the positioning cylinder 5. The iron core 3 is tightly fitted and installed on the second stepped groove 7. Conductive copper wires are wound and installed on the iron core 3. Insulating paint is coated and installed on both the conductive copper wires and the iron core 3. The conductive copper wires and the PCBA board 2 are electrically connected to each other. An assembly groove 8 is formed in the middle of the fan blade 4. A rotating shaft 9 is fixedly installed in the middle of the assembly groove 8. The rotating shaft 9 is rotatably fitted and installed in the positioning cylinder 5. A permanent magnet ring 10 is fixedly installed on the side wall of the assembly groove 8. The iron core 3 is installed in the permanent magnet ring 10 with a clearance fit. A welding groove 11 is formed on the bracket base 1. The welding groove 11 is located on the side of the PCBA board 2. Liquid silicone is filled and sealed between the PCBA board 2 and the bracket base 1 through the welding groove 11.

[0036] The principle is as follows: The PCBA board 2 is snap-fitted and installed on the positioning cylinder 5 of the bracket base 1, which improves the traditional assembly method of using a wire frame to be welded to the PCBA through pins, achieving the effect of rapid assembly of the PCBA board 2. Since the PCBA board 2 is installed inside the base, it will not be directly exposed. The bracket base 1 can provide effective protection for the PCBA board 2. Insulation is done on the iron core 3 by painting, which can improve the yield and operability of the product. Then, a welding groove 11 is provided on the bracket base 1 to facilitate the wiring and welding operations on the PCBA board 2. Finally, liquid silicone is poured into the welding groove 11. The liquid silicone will fill the gap between the PCBA board 2 and the bracket base 1. After the liquid silicone dries, a stable sealing structure will be formed to achieve effective waterproofing and increase the service life of the fan.

[0037] In the present utility model, the permanent magnet ring 10 and the rotating shaft 9 are directly installed in the assembly groove 8 formed in the middle of the fan blade 4, realizing the integration of the motor and the fan, effectively saving space, and at the same time ensuring the stable rotation of the fan blade 4 without uneven stress.

[0038] Furthermore: A circular hole 12 is formed in the middle of the PCBA board 2. The PCBA board 2 is installed on the first stepped groove 6 with a clearance fit through the circular hole 12. At least three buckles 13 are formed on the outer side of the positioning cylinder 5. The PCBA board 2 is snap-fitted and installed on the first stepped groove 6 through at least three buckles 13, which can ensure the stable snap-fitting and installation of the PCBA board 2 on the positioning cylinder 5.

[0039] Furthermore: A limiting block 14 is formed on the outer side of the first stepped groove 6, and a limiting groove 15 is formed in the circular hole 12 of the PCBA board 2. The limiting block 14 is inserted into the limiting groove 15 with a clearance fit; the angle of the PCBA board 2 can be limited, and the PCBA board 2 will not rotate on the positioning cylinder 5, thereby ensuring the service life of the fan.

[0040] Furthermore: An inner hole 16 is formed on the iron core 3, and the inner hole 16 is tightly fitted and installed on the second stepped groove 7. A semi-circular groove 17 is formed on the inner hole 16, and a semi-circular convex edge 18 is formed on the outer side of the positioning cylinder 5. The semi-circular convex edge 18 is installed in the semi-circular groove 17 with a clearance fit; the iron core 3 will not rotate relative to the positioning cylinder 5, ensuring the stable installation of the iron core 3.

[0041] Furthermore: A plurality of tightly fitted bevel edges 19 are formed on the outer side of the positioning cylinder 5, and the plurality of tightly fitted bevel edges 19 are circularly arranged with each other. The inner ring 4.1 of the iron core 3 is pressed and fitted on the second stepped groove 7 through the plurality of tightly fitted bevel edges 19; the assembly of the iron core 3 can be completed by pressing, achieving the effect of rapid assembly and positioning.

[0042] Furthermore: The welding grooves 11 on the bracket base 1 include a UVW wire groove 11.1 and an IF wire groove 11.2. The UVW welding position 20 and the IF welding position 21 are inlaid and installed on the side of the PCBA board 2. The UVW wire groove 11.1 is arranged outside the UVW welding position 20, and the IF wire groove 11.2 is arranged outside the IF welding position 21; corresponding openings can be provided for welding operations, facilitating the extraction of UVW wires and IF wires on the PCBA board 2 for use.

[0043] Furthermore: The fan blade 4 includes an inner ring 4.1, an outer ring 4.2, and a plurality of arc-shaped edges 4.3. The assembly groove 8 is integrally formed in the middle of the inner ring 4.1, and the arc-shaped edges 4.3 are integrally formed between the inner ring 4.1 and the outer ring 4.2. The plurality of arc-shaped edges 4.3 are separated from each other and circularly arranged; when the fan blade 4 rotates, the air volume can be driven to flow through the plurality of arc-shaped edges 4.3, thereby achieving the effect of rapid blowing.

[0044] Furthermore: A circular cylinder 22 is tightly fitted and installed in the assembly groove 8, and the permanent magnet ring 10 is fixedly installed on the inner side wall of the circular cylinder 22; the circular cylinder 22 can play a role in reinforcement, avoiding the situation of displacement of the permanent magnet ring 10 or expansion of the inner diameter of the assembly groove 8.

[0045] Furthermore: At least two rolling bearings 23 are sleeved and installed on the rotating shaft 9, and the outer wall of the rolling bearing 23 is installed in the positioning cylinder 5 with a clearance fit; the rotational movement of the rotating shaft 9 is more stable and smooth, without shaking, thereby reducing the noise generated during the use of the fan.

[0046] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the present utility model. Any simple modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present utility model all fall within the protection scope of the technical solution of the present utility model.

Claims

1. A fan installation structure for eliminating the stator wire frame in a fan, characterized in that: Including bracket base, PCBA board, iron core and fan blades; A positioning cylinder is formed in the middle of the inner side of the bracket base, and a first step groove is formed at the outer edge of the positioning cylinder, and the PCBA board is buckled and installed on the first step groove; A second stepped groove is formed on the outer side of the positioning cylinder, and the iron core is tightly mounted on the second stepped groove; The iron core is wound with a conductive copper wire, the outer sides of the conductive copper wire and the iron core are coated with insulating paint, and the conductive copper wire and the PCBA board are electrically connected to each other; An assembly groove is formed in the middle of the fan blade, a rotating shaft is fixedly installed in the middle of the assembly groove, the rotating shaft is rotatably mounted in the positioning cylinder, a permanent magnet ring is fixedly installed on the side wall of the assembly groove, and the iron core is installed in the permanent magnet ring with clearance; A welding groove is formed on the bracket base, and the welding groove is located on the side of the PCBA board. Liquid silicone is filled between the PCBA board and the bracket base through the welding groove.

2. A fan installation structure for eliminating a stator wire frame in a fan according to claim 1, characterized in that: A circular hole is formed in the middle of the PCBA board, and the PCBA board is fitted on the first stepped groove through the clearance of the circular hole.

3. The fan installation structure for eliminating the stator wire frame in the fan according to claim 2, characterized in that: At least three buckles are formed on the outer side of the positioning cylinder, and the PCBA board is mounted on the first stepped groove by buckling with the at least three buckles.

4. A fan installation structure for eliminating a stator wire frame in a fan according to any one of claims 2 or 3, characterized in that: A limiting block is formed on the outer side of the first stepped groove, a limiting groove is formed in the circular hole of the PCBA board, and the limiting block is inserted into the limiting groove with clearance.

5. The fan installation structure for eliminating the stator wire frame used in the fan according to claim 1, characterized in that: The iron core is formed with an inner hole, which is tightly mounted on the second stepped groove. The inner hole is formed with a semicircular slot, and the outer side of the positioning cylinder is formed with a semicircular convex edge, which is installed in the semicircular slot with a clearance fit.

6. A fan installation structure for eliminating a stator wire frame in a fan according to claim 5, characterized in that: The outer side of the positioning cylinder is formed with a plurality of tight-fitting bevels, which are arranged in a circular array with each other, and the inner ring of the core is installed on the second stepped groove by means of a plurality of tight-fitting bevels.

7. The fan installation structure for eliminating the stator wire frame used in the fan according to claim 1, characterized in that: The welding grooves on the bracket base include UVW wire grooves and IF wire grooves. The sides of the PCBA board are inlaid with UVW welding positions and IF welding positions. The UVW wire groove is arranged outside the UVW welding position, and the IF wire groove is arranged outside the IF welding position.

8. The fan installation structure for eliminating the stator wire frame in the fan according to claim 1, characterized in that: The fan blade includes an inner ring, an outer ring and a plurality of arcuate edges. The assembly groove is integrally formed in the middle of the inner ring. The arcuate edges are integrally formed between the inner ring and the outer ring. The plurality of arcuate edges are separated from each other and arranged in a circular array.

9. A fan installation structure for eliminating a stator wire frame in a fan according to any one of claims 1 or 8, characterized in that: An annular cylinder is tightly mounted in the assembly groove, and the permanent magnetic ring is fixedly mounted on the inner side wall of the annular cylinder.

10. The fan installation structure for eliminating the stator wire frame in the fan according to claim 1, characterized in that: At least two rolling bearings are sleeved and installed on the rotating shaft, and the outer walls of the rolling bearings are installed in the positioning cylinder with clearance fit.

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