Wind wheel and motor rotor integrated injection molding structure

Abstract

The utility model relates to the technical field of outer rotor motor assembly, and discloses a wind wheel and motor rotor integrated injection molding structure, which comprises a wind wheel body and an outer rotor motor integrally injection-molded with the wind wheel body, the outer rotor motor comprises a rotor, a stator and a rotating shaft, the stator is arranged on the inner side of the rotor, and the rotating shaft is arranged on the outer side of the rotor. The rotating shaft penetrates through the stator and is fixedly connected with the rotor, a mounting cavity is formed in the bottom of the wind wheel body, the rotor is integrally formed in the mounting cavity in an injection molding mode, a limiting insertion hole matched with the rotating shaft is formed in the center of the mounting cavity, and the limiting insertion hole is in clearance fit with the rotating shaft. The rotating shaft is correspondingly inserted into the limiting insertion holes and then is integrally formed with the wind wheel body in an injection molding mode.

Description

Technical Field

[0001] The utility model relates to the technical field of outer rotor motor assembly, in particular to an integral injection molding structure of a wind wheel and a motor rotor. Background Art

[0002] Wind wheels are used in many fields. Wind wheels can be divided into axial flow wind wheels and radial flow wind wheels according to the air flow direction during operation. Large axial flow wind wheels are mainly suitable for exhaust in places such as dust and gravel fields; medium axial flow wind wheels are mainly suitable for indoor ventilation and heat dissipation; and small axial flow wind wheels are mainly suitable for ventilation and heat dissipation of mechanical equipment, such as electrical cabinets, automobiles, air conditioners, etc.

[0003] The existing wind wheel mainly includes a wind wheel and a drive motor. When manufacturing the wind wheel, the wind wheel and the drive motor need to be manufactured separately first, and then the wind wheel and the drive motor are assembled together, and the wind wheel is driven to rotate by the rotation of the motor shaft. The connection stability between the existing drive motor and the wind wheel is poor. When the drive motor rotates, the overall vibration of the wind wheel is relatively large, resulting in a large noise caused by the wind wheel running in the equipment after assembly, and the risk of falling off easily after long-term operation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an integral injection molding structure of a wind wheel and a motor rotor.

[0005] The technical solution of the utility model is: a wind wheel and motor rotor integrated injection molding structure, including a wind wheel body and an outer rotor motor integrally injection molded with the wind wheel body, the outer rotor motor including a rotor, a stator and a rotating shaft, the stator is arranged on the inner side of the rotor, the rotating shaft passes through the stator and is fixedly connected to the rotor, an installation cavity is arranged at the bottom of the wind wheel body, the rotor is integrally injection molded in the installation cavity, a limiting socket adapted to the rotating shaft is arranged at the center of the installation cavity, the limiting socket is gap-matched with the rotating shaft, and the rotating shaft is correspondingly inserted in the limiting socket and is integrally injection molded with the wind wheel body.

[0006] It can be seen from the above scheme that the rotor is arranged on the outside of the stator and is fixed through the mounting cavity at the bottom of the wind wheel by integral injection molding. The end of the rotating shaft is inserted and limited in the limit hole and fixed by integral injection molding. The outer rotor motor is integrally injection molded with the wind wheel body to realize the assembly of the wind wheel, which has a simple structure and good stability.

[0007] The rotor includes a rotor sleeve, which is arranged in the installation cavity, one end of the rotor sleeve is open and provided with a mounting groove, the stator is arranged in the mounting groove, and the end surface of the rotor sleeve is provided with a supporting hole coaxial with the rotating shaft, and the supporting hole is recessed toward the mounting groove. It can be seen that the installation cavity is adapted to the rotor sleeve, and the supporting hole is convenient for supporting the molten plastic overflowing from the limiting plug hole and the installation cavity to prevent overflow.

[0008] The end of the rotor sleeve is provided with a motor main control board, and the motor main control board is provided with a motor bracket. It can be seen that the motor main control board is used to realize the electrical connection of the outer rotor motor, and the motor bracket is used to realize the limit of the outer rotor motor.

[0009] The wind wheel body includes a front cover, a rear seat and a wind wheel module connected between the front cover and the rear seat, the wind wheel module includes a plurality of blades formed in a ring array, an air inlet is provided at the end of the front cover, the mounting cavity is provided on the rear seat, the blades are arranged in an inclined manner, and an air outlet channel is provided between two adjacent groups of the blades. It can be seen that the air inlet is used to achieve air inlet at the end of the wind wheel, and the air outlet channel is used to achieve air outflow when the outer rotor motor rotates.

[0010] The front end cover includes a straight tube portion and an outer edge portion, the straight tube portion and the outer edge portion are in an arc transition, the outer edge portion is connected to the blade, and the outer diameter of the wind wheel module is equal to the outer diameter of the front end cover. It can be seen that the front end cover is used to guide the air when it enters the wind wheel, effectively reducing the resistance.

[0011] A limiting ring groove is provided on the outer circumference of the rotating shaft, and the distance between the end of the rotating shaft and the limiting ring groove is less than the depth of the limiting plug hole. It can be seen that the limiting ring groove is used to facilitate the molten injection molding solution to fully penetrate into the connection between the rotating shaft and the limiting plug hole after the rotor is assembled and limited to the limiting plug hole, thereby improving the stability of the connection between the outer rotor motor and the rotating shaft and effectively preventing it from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a cross-sectional view of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure of the wind wheel;

[0015] Figure 4 It is a schematic diagram of the rotor structure. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0017] like Figures 1 to 4 As shown, the utility model is an integral injection molding structure of a wind wheel and a motor rotor, comprising a wind wheel body 1 and an outer rotor motor 2 integrally injection molded with the wind wheel body 1, the outer rotor motor 2 comprising a rotor 21, a stator 22 and a rotating shaft 23, the stator 22 being arranged inside the rotor 21, the rotating shaft 23 passing through the stator 22 and being fixedly connected with the rotor 21, a mounting cavity 3 being arranged at the bottom of the wind wheel body 1, the rotor being integrally injection molded in the mounting cavity 3, a limiting plug hole 31 adapted to the rotating shaft 23 being arranged at the center of the mounting cavity 3, the limiting plug hole 31 being gap-matched with the rotating shaft 23, the rotating shaft 23 being correspondingly inserted in the limiting plug hole 31 and then integrally injection molded with the wind wheel body 1. In this embodiment, the stator 22 comprises a stator seat and a magnetic conductive module, the magnetic conductive module being located between the stator seat and the mounting cavity 3.

[0018] The rotor 21 includes a rotor sleeve 211, which is disposed in the installation cavity 3. One end of the rotor sleeve 211 is open and provided with a mounting groove 212. The stator 22 is disposed in the mounting groove 212. The end surface of the rotor sleeve 211 is provided with a supporting hole 213 coaxial with the rotating shaft 23. The supporting hole 213 is recessed toward the mounting groove 212. The end of the rotor sleeve 211 is provided with a motor main control board 24, and the motor bracket 5 is disposed on the motor main control board 24. In this embodiment, the end of the rotating shaft 23 is disposed through the end of the rotor sleeve 211, and the motor main control board 24 is electrically connected to the outer rotor motor 2.

[0019] The wind wheel body 1 includes a front cover 11, a rear seat 12, and a wind wheel module connected between the front cover 11 and the rear seat 12. The wind wheel module includes a plurality of blades 13 formed in a ring array. An air inlet 10 is provided at the end of the front cover 11. The mounting cavity 3 is provided on the rear seat 12. The blades 13 are arranged in an inclined manner. An air outlet channel 14 is provided between two adjacent groups of the blades 13. The front cover 11 includes a straight tube portion 111 and an outer edge portion 112. The straight tube portion 111 and the outer edge portion 112 are in an arc-shaped transition. The outer edge portion 112 is connected to the blades 13. The outer diameter of the wind wheel module is equal to the outer diameter of the front cover 11. In this embodiment, the end of the blade 14 close to the air inlet 10 is in an arc-shaped transition. The number of the blades 14 is 10. An even number of blades 14 facilitates the adjustment of dynamic balance.

[0020] The outer circumference of the rotating shaft 23 is provided with a limiting ring groove 4, and the distance between the end of the rotating shaft 23 and the limiting ring groove 4 is less than the depth of the limiting insertion hole 31. In this embodiment, the outer circumference of the rotating shaft 23 is provided with two sets of limiting ring grooves 4 near both ends.

[0021] The working process of the utility model is as follows: the rotor 21 is installed in the installation cavity 3, the rotating shaft 23 is aligned with the limiting hole 31 and then inserted into the wind wheel body 1, and the molten plastic is injected between the motor shaft 2 and the wind wheel body 1. On the one hand, the plastic flows into between the limiting ring groove 4 and the limiting hole 31, and the rotating shaft 23 and the limiting hole 31 are fixed by integral injection molding. On the other hand, the plastic to be injected flows into between the rotor sleeve 211 and the installation cavity 3, thereby realizing the integral injection molding of the outer rotor motor 2 and the wind wheel body 1.

[0022] Finally, it should be emphasized that the above is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wind wheel and motor rotor integrated injection molding structure, characterized in that: The invention comprises a wind rotor body (1) and an outer rotor motor (2) which is integrally injection-molded with the wind rotor body (1); the outer rotor motor (2) comprises a rotor (21), a stator (22) and a rotating shaft (23); the stator (22) is arranged on the inner side of the rotor (21); the rotating shaft (23) passes through the stator (22) and is fixedly connected to the rotor (21); a mounting cavity (3) is arranged at the bottom of the wind rotor body (1); the rotor is integrally injection-molded in the mounting cavity (3); a limiting plug hole (31) which is adapted to the rotating shaft (23) is arranged at the center of the mounting cavity (3); the limiting plug hole (31) and the rotating shaft (23) are clearance-matched; the rotating shaft (23) is correspondingly inserted into the limiting plug hole (31) and then integrally injection-molded with the wind rotor body (1).

2. The integral injection molding structure of a wind wheel and a motor rotor according to claim 1, characterized in that: The rotor (21) comprises a rotor sleeve (211), the rotor sleeve (211) being arranged in the installation cavity (3), one end of the rotor sleeve (211) being open and provided with a mounting groove (212), the stator (22) being arranged in the mounting groove (212), the end surface of the rotor sleeve (211) being provided with a supporting hole (213) coaxial with the rotating shaft (23), the supporting hole (213) being recessed toward the mounting groove (212).

3. The integral injection molding structure of a wind wheel and a motor rotor according to claim 2, characterized in that: A motor main control board (24) is arranged at the end of the rotor sleeve (211), and a motor bracket (5) is arranged on the motor main control board (24).

4. The integral injection molding structure of a wind wheel and a motor rotor according to claim 1, characterized in that: The wind wheel body (1) comprises a front end cover (11), a rear end seat (12) and a wind wheel module connected between the front end cover (11) and the rear end seat (12); the wind wheel module comprises a plurality of blades (13) formed in a ring-shaped array; an air inlet (10) is provided at the end of the front end cover (11); the mounting cavity (3) is provided on the rear end seat (12); the blades (13) are arranged in an inclined manner; and an air outlet channel (14) is provided between two adjacent groups of the blades (13).

5. The integral injection molding structure of a wind wheel and a motor rotor according to claim 4, characterized in that: The front end cover (11) comprises a straight tube portion (111) and an outer edge portion (112); the straight tube portion (111) and the outer edge portion (112) are in an arc-shaped transition; the outer edge portion (112) is connected to the blade (13); and the outer diameter of the wind wheel module is equal to the outer diameter of the front end cover (11).

6. The integral injection molding structure of a wind wheel and a motor rotor according to claim 1, characterized in that: A limiting annular groove (4) is provided on the outer circumference of the rotating shaft (23), and the distance between the end of the rotating shaft (23) and the limiting annular groove (4) is less than the depth of the limiting insertion hole (31).

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