Single-rotor motor

Abstract

The invention discloses a single-rotor motor which comprises a motor base, and a motor shaft is arranged on the motor base. A rotor is arranged on the motor shaft, a stator is fixedly arranged on the base, and the stator is a PCB (Printed Circuit Board); according to the single-rotor motor disclosed by the invention, the magnetic conductive disk and the stator are relatively static, so that the fluctuation amplitude of magnetic pulling force is reduced, the magnetic pulling force is distributed more uniformly, the service life of the motor shaft is prolonged, rotating parts are reduced, and the assembly cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a single-rotor motor. Background Art

[0002] PCB motors often adopt a two-rotor structure in applications, such as the Chinese invention patent with application number 2024221238714, which arranges a rotor and a sub-rotor on both sides of the stator to rotate synchronously. The sub-rotor not only plays a role in reducing the magnetic group, but also plays a role in balancing the force on both sides of the bearing.

[0003] Its defects are:

[0004] The magnetic pull force caused by the dynamic sub-rotor has a large fluctuation range and the distribution of the magnetic pull force is uneven, which causes the force applied to the shaft of the motor to fluctuate, affecting the life of the shaft and bearings. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the present invention provides a single-rotor motor, which reduces the fluctuation amplitude of the magnetic pull by making the conductive disk and the stator relatively stationary, makes the magnetic pull distribution more balanced, and increases the service life of the motor shaft. At the same time, it reduces rotating parts and reduces assembly costs.

[0006] To achieve the above object, the present invention adopts the following technical solution:

[0007] The present invention provides a single-rotor motor, comprising a base, on which a motor shaft is arranged;

[0008] The motor shaft is provided with a rotor, the base is fixedly provided with a stator, and the stator is a PCB board;

[0009] It also includes a guide disk, which is fixedly connected to the stator or the base.

[0010] In the single-rotor motor of the present invention, since the stator is fixed to the base, and the magnetic guide disk is fixed to the base or the stator, the magnetic guide disk and the stator are always relatively stationary. During the operation of the motor, since the magnetic guide disk is always relatively stationary to the stator, the influence of its movement on the fluctuation of the magnetic pulling force is eliminated. Therefore, the fluctuation amplitude of the magnetic pulling force is smaller, and the force on the motor shaft is more balanced.

[0011] The single-rotor motor of the present invention reduces the fluctuation amplitude of the magnetic pulling force by making the conductive magnetic disk and the stator relatively static, makes the magnetic pulling force distribution more balanced, increases the service life of the motor shaft, and reduces the rotating parts and assembly costs.

[0012] In a further technical solution, the guide disk and the stator are both annular structures and are coaxially sleeved on the motor shaft.

[0013] The annular and coaxially sleeved guide disk and stator make the structure of the motor itself more compact, the rotor, stator and guide disk occupy less space, the spacing is small, and the driving efficiency is high.

[0014] In a further technical solution, the rotor includes a back iron on which a magnet is fixedly disposed.

[0015] In a further technical solution, the rotor is rotatably connected to the motor shaft via a bearing.

[0016] In a further technical solution, a convex ring is provided in the middle of the back iron and the rotor is connected to the outer ring of the bearing through the convex ring.

[0017] The provision of the convex ring disperses the force applied by the rotor to the bearing, making the forces on the motor shaft and the bearing more balanced.

[0018] In a further technical solution, two bearings are coaxially arranged.

[0019] The two bearings make the force generated by the rotor rotation on the motor shaft more balanced and the rotation stability better.

[0020] The beneficial effects are:

[0021] 1. The single-rotor motor of the present invention reduces the fluctuation amplitude of the magnetic pulling force by making the conductive disk and the stator relatively static, making the magnetic pulling force distribution more balanced, thereby increasing the service life of the motor shaft, reducing the rotating parts and reducing the assembly cost.

[0022] 2. The annular and coaxially sleeved guide disk and stator make the structure of the motor itself more compact, the rotor, stator and guide disk occupy less space, the spacing is small, and the driving efficiency is high.

[0023] 3. The setting of the convex ring disperses the force applied by the rotor to the bearing, making the force on the motor shaft and the bearing more balanced.

[0024] 4. The two bearings make the force exerted on the motor shaft by the rotation of the rotor more balanced and the rotation stability better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the internal structure of a single-rotor motor according to an embodiment of the present invention.

[0026] 10. Machine base; 20. Motor shaft; 30. Rotor; 31. Back iron; 32. Convex ring; 33. Magnet; 40. Stator; 41. Fixing part; 50. Guide disk; 60. Bearing. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings:

[0028] Example:

[0029] A single rotor motor, such as Figure 1 As shown, it includes a base 10, on which a motor shaft 20 is arranged;

[0030] The motor shaft 20 is provided with a rotor 30, and the base 10 is fixedly provided with a stator 40, which is a PCB board;

[0031] The machine body also includes a guide magnetic disk 50 , which is fixedly connected to the stator 40 or the base 10 .

[0032] In this embodiment, the rotor 30 includes a back iron 31 , on which a magnet 33 is fixedly disposed.

[0033] In this embodiment, the rotor 30 is rotatably connected to the motor shaft 20 via a bearing 60 .

[0034] In the single-rotor motor 30 of the present invention, since the stator 40 is fixed to the base 10 and the guide magnetic disk 50 is fixed to the base 10 or the stator 40, the guide magnetic disk 50 and the stator 40 are always relatively stationary. During the operation of the motor, since the guide magnetic disk 50 is always relatively stationary to the stator 40, the influence of its movement on the fluctuation of the magnetic pull is eliminated. Therefore, the fluctuation amplitude of the magnetic pull is smaller, and the force on the motor shaft 20 is more balanced.

[0035] The single-rotor motor of the present invention reduces the fluctuation amplitude of the magnetic pulling force by making the magnetic disk 50 and the stator 40 relatively static, makes the magnetic pulling force distribution more balanced, increases the service life of the motor shaft 20, and reduces the rotating parts and assembly costs.

[0036] Specifically, the unilateral magnetic pulling force Fs is calculated by the simulation software Maxwell, and the maximum magnetic pulling force Fs.max, the minimum magnetic pulling force Fs.min, and the average magnetic pulling force Fs.avg are defined.

[0037] In the solution of the conventional auxiliary rotor 30, the magnetic pull force fluctuation amplitude is (Fs.max-Fs.min) / Fs.avg=12%.

[0038] In the present invention, the fluctuation range of magnetic pulling force is (Fs.max-Fs.min) / Fs.avg=7%, and the fluctuation range of unilateral magnetic pulling force is reduced by 5%.

[0039] In another embodiment, the guide disk 50 and the stator 40 are both annular structures and are coaxially sleeved on the motor shaft 20 .

[0040] The annular and coaxially sleeved guide magnetic disk 50 and stator 40 make the structure of the motor itself more compact, and the rotor 30, stator 40 and guide magnetic disk 50 occupy a smaller space, have a smaller spacing, and have a high driving efficiency.

[0041] In another embodiment, a convex ring 32 is disposed in the middle of the back iron 31 and the rotor 30 is connected to the outer ring of the bearing 60 via the convex ring 32 .

[0042] The provision of the convex ring 32 disperses the force applied by the rotor 30 to the bearing 60 , so that the forces on the motor shaft 20 and the bearing 60 are more balanced.

[0043] In another embodiment, two bearings 60 are coaxially arranged.

[0044] The two bearings 60 make the force generated by the rotation of the rotor 30 on the motor shaft 20 more balanced and improve the rotation stability.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A single-rotor motor, characterized in that: It comprises a machine base, on which a motor shaft is arranged; The motor shaft is provided with a rotor, the base is fixedly provided with a stator, and the stator is a PCB board; It also includes a guide disk, which is fixedly connected to the stator or the base.

2. The single-rotor motor according to claim 1, characterized in that: The guide disk and the stator are both annular structures and are coaxially sleeved on the motor shaft.

3. The single-rotor motor according to claim 1, characterized in that: The rotor comprises a back iron on which a magnet is fixedly arranged.

4. The single-rotor motor according to claim 3, characterized in that: The rotor is rotatably connected to the motor shaft via a bearing.

5. The single-rotor motor according to claim 4, characterized in that: A convex ring is arranged in the middle of the back iron and the rotor is connected with the outer ring of the bearing through the convex ring.

6. The single-rotor motor according to claim 4 or 5, characterized in that: Two bearings are coaxially arranged.

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