Motor structure capable of increasing magnetic attraction
By setting the attraction between the iron ring and the magnetic strip in the motor structure, the problems of unusual sound and high cost caused by friction are solved, and the effect of less noise and prolonging the service life is achieved.
Patent Information
- Application Number
- CN202322369093.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-01
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2033-09-01
AI Technical Summary
The existing motor structures cause abnormal sound due to friction and are costly, which affects service life and noise problems.
By setting the fit between the iron ring and the magnetic strip, an attractive force is generated, ensuring a gap between the spring and the O-ring, reducing friction, and stabilizing the movement of the shaft core and the outer rotor through the design of oil-containing bearings and silicon steel sheets.
Effectively reduce noise, extend the service life of the motor, and reduce costs.
Smart Images
Figure CN222356066U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motor structures, in particular to a motor structure with increased magnetic attraction. Background Art
[0002] Nowadays, many small household humidifiers or purifiers use an outer rotor motor with a fan blade loaded on the shaft core. The rotation of the motor drives the fan blade to rotate, and the mist or ozone generated at the bottom of the product is sent to the outside of the product through the air duct formed by the rotation of the fan blade for people to use, thereby increasing the humidity of the environment or purifying the air.
[0003] This type of motor is typically divided into a double-core structure and an oil-containing structure. In a double-core motor, the outer rotor rotates simultaneously with the inner ring of the ball bearings. The motor's sound originates from the self-lubricating system within the ball bearings. The downward force generated by the load and the load's own gravity are balanced by the double-core springs, achieving an upward and downward force balance. Therefore, a double-core motor is very suitable for this type of application. However, double-core motors are very expensive, making this cost prohibitive for manufacturers and many consumers. This is why the oil-containing structure was developed. Oil-containing motors are designed with the rotor facing downward, the exposed shaft facing upward, and the load blades installed. The rotor is tightly fitted with magnetic strips, the motor silicon steel sheet is tightly fitted to the outside of the bracket shaft, and the bearing is tightly fitted to the bracket shaft. An O-ring is added to each end of the bearing, and lubricating oil is added to the bearing hole. The rotor shaft passes through the inner hole of the oil-containing bearing, and a retaining ring is installed in the shaft groove. The load is mounted on the top of the shaft. When the motor is operating, due to the gap between the retaining spring, O-ring, and bearing surface, the downward reaction force generated by the load and the weight of the load itself will cause the rotor to move downward. The retaining spring compresses the O-ring, which presses against the bearing surface. The rotation of the shaft core causes the retaining spring and O-ring to rotate with it, generating friction between the retaining spring and O-ring, and between the O-ring and the bearing surface. Since the friction coefficients of various surface materials are different, the rotor, retaining spring, and O-ring rotate out of sync, generating abnormal noise. Friction also produces abnormal noise. However, friction causes wear. O-rings are made of rubber or silicone, the softest material, and are most susceptible to wear. Once worn, they will produce foreign matter, which will increase the abnormal noise and shorten the life of the motor.
[0004] In summary, the present invention provides a motor structure with increased magnetic attraction to solve the above problems. Utility Model Content
[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a motor structure with increased magnetic attraction. Its advantage is that the magnetic strip can be attracted by the provided iron ring, thereby ensuring that there is a certain gap between the retaining spring and the rear O-ring, so that the structural state of the motor can be optimized during operation, which can reduce noise and extend service life.
[0006] To achieve the above objectives, the present invention provides the following technical solutions:
[0007] A motor structure with increased magnetic attraction comprises: a load blade, a bracket and an outer rotor, wherein the load blade, the bracket and the outer rotor are arranged in sequence, a shaft core is rotatably mounted inside the outer rotor, the bracket is mounted on the outside of the shaft core via an oil-containing bearing, the load blade is fixedly mounted on one end of the shaft core, a magnetic strip is mounted inside the outer rotor, and an iron ring is mounted on the inner side of the bottom of the bracket.
[0008] By adopting the above technical solution, an attraction force can be generated between the iron ring and the magnetic strip through the cooperation between the iron ring and the magnetic strip, thereby providing an upward attraction force for the magnetic strip and the outer rotor.
[0009] The utility model is further configured as follows: a front O-type oil ring is installed at one end of the oil-containing bearing, and the front O-type oil ring is sleeved on the circumference of the shaft core.
[0010] By adopting the above technical solution, the front O-ring can ensure that the connection between the oil-containing bearing and the shaft core is more stable.
[0011] The utility model is further configured as follows: a rear O-type oil ring is installed at the other end of the oil-containing bearing, and the rear O-type oil ring is sleeved on the circumference of the shaft core.
[0012] By adopting the above technical solution, the connection between the oil-containing bearing and the shaft core can be ensured to be more stable through the rear O-ring.
[0013] The utility model is further configured as follows: a retaining spring is installed on the shaft core, and the retaining spring is located on one side of the rear O-type oil ring.
[0014] By adopting the above technical solution, the circlip can prevent the axial movement of parts on the shaft or the hole.
[0015] The utility model is further configured as follows: a silicon steel sheet is installed on the peripheral side of the bracket, and the silicon steel sheet is located inside the outer rotor.
[0016] By adopting the above technical solution, the integrity of the iron core can be ensured through the silicon steel sheet.
[0017] The utility model is further configured as follows: a PCB board is installed on the silicon steel sheet, and the PCB board is located in the bracket.
[0018] By adopting the above technical solution, the arrangement of the internal components of the motor can be conveniently controlled through the PCB board.
[0019] The utility model is further configured as follows: the iron ring is located between the PCB board and the magnetic strip.
[0020] By adopting the above technical solution, it can be ensured that the iron ring can cooperate with the magnetic strip normally.
[0021] In summary, the beneficial technical effects of the present invention are:
[0022] The utility model can attract the magnetic strip by the iron ring provided, so as to ensure that there is a certain gap between the retaining spring and the rear O-ring, so that the structural state of the motor can be optimized when it is working, which can reduce noise and extend the service life.
[0023] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The drawings described below are only some embodiments. A person skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:
[0025] Figure 1 This is a schematic diagram of the interior of a motor according to an embodiment of the present utility model;
[0026] Figure 2 A perspective view of an embodiment of the present utility model;
[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:
[0028] 1. Circlip; 2. Rear O-ring; 3. Bracket; 4. Outer rotor; 5. Magnetic strip; 6. Oil-containing bearing; 7. Front O-ring; 8. Silicon steel sheet; 9. PCB board; 10. Iron ring; 11. Load fan blade; 12. Shaft core. DETAILED DESCRIPTION
[0029] The present invention will be described in further detail below with reference to the accompanying drawings.
[0030] Reference Figure 1-2 , which is a motor structure with increased magnetic attraction disclosed by the present invention, including: a load fan blade 11, a bracket 3 and an outer rotor 4, the load fan blade 11, the bracket 3 and the outer rotor 4 are arranged in sequence, a shaft core 12 is rotatably installed in the outer rotor 4, the bracket 3 is installed on the outside of the shaft core 12 through an oil-containing bearing 6, the load fan blade 11 is fixedly installed at one end of the shaft core 12, a magnetic strip 5 is installed in the outer rotor 4, and an iron ring 10 is installed on the inner side of the bottom of the bracket 3. The iron ring 10 cooperates with the magnetic strip 5 to generate an attraction between the iron ring 10 and the magnetic strip 5, thereby providing an upward attraction for the magnetic strip 5 and the outer rotor 4.
[0031] Reference Figure 1In this embodiment, one end of the oil-containing bearing 6 is equipped with a front O-type oil ring 7, and the front O-type oil ring 7 is sleeved on the side of the shaft core 12. The other end of the oil-containing bearing 6 is equipped with a rear O-type oil ring 2, and the rear O-type oil ring 2 is sleeved on the side of the shaft core 12. A retaining spring 1 is installed on the shaft core 12, and the retaining spring 1 is located on one side of the rear O-type oil ring 2. A silicon steel sheet 8 is installed on the side of the bracket 3. The silicon steel sheet 8 is located in the outer rotor 4. A PCB board 9 is installed on the silicon steel sheet 8. The PCB board 9 is located in the bracket 3. An iron ring 10 is located between the PCB board 9 and the magnetic strip 5. An iron ring 10 is fixed between the bracket 3 and the PCB board 9, so that the iron The ring 10 is facing the magnetic stripe 5, which is beneficial to the magnetic attraction between the magnetic stripe 5 and the iron ring 10, and provides an upward magnetic force to the magnetic stripe 5. Since the magnetic stripe 5 and the outer rotor 4 are tightly matched, it is equivalent to providing an upward magnetic force to the rotor, and one end of the rotor inner shaft core 12 is connected to the load fan blade 11, so the upward magnetic force can just balance the downward reaction force of the load when working and the downward gravity of the load itself. Therefore, it can ensure that there is a certain gap between the retaining spring 1 and the rear O-ring 2, so that the structural state of the motor can be optimized when working, which can reduce noise and extend the service life.
[0032] The above-mentioned embodiments can be combined with each other.
[0033] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.
Claims
1. A motor structure for increasing magnetic attraction, comprising: A load blade (11), a bracket (3) and an outer rotor (4), characterized in that the load blade (11), the bracket (3) and the outer rotor (4) are arranged in sequence, a shaft core (12) is rotatably mounted inside the outer rotor (4), the bracket (3) is mounted on the outside of the shaft core (12) via an oil-containing bearing (6), the load blade (11) is fixedly mounted on one end of the shaft core (12), a magnetic strip (5) is mounted inside the outer rotor (4), and an iron ring (10) is mounted on the inner side of the bottom of the bracket (3).
2. A motor structure for increasing magnetic attraction according to claim 1, characterized in that: A front O-type oil ring (7) is mounted on one end of the oil-containing bearing (6), and the front O-type oil ring (7) is sleeved on the circumference of the shaft core (12).
3. The motor structure for increasing magnetic attraction according to claim 1, characterized in that: The other end of the oil-containing bearing (6) is provided with a rear O-type oil ring (2), and the rear O-type oil ring (2) is sleeved on the circumference of the shaft core (12).
4. The motor structure for increasing magnetic attraction according to claim 3, characterized in that: A retaining spring (1) is mounted on the shaft core (12), and the retaining spring (1) is located on one side of the rear O-type oil ring (2).
5. The motor structure for increasing magnetic attraction according to claim 1, characterized in that: A silicon steel sheet (8) is mounted on the circumference of the bracket (3), and the silicon steel sheet (8) is located inside the outer rotor (4).
6. The motor structure for increasing magnetic attraction according to claim 5, characterized in that: A PCB board (9) is mounted on the silicon steel sheet (8), and the PCB board (9) is located inside the bracket (3).
7. The motor structure for increasing magnetic attraction according to claim 6, characterized in that: The iron ring (10) is located between the PCB board (9) and the magnetic strip (5).