Axial flux motor

Abstract

The invention discloses an axial magnetic flux motor which comprises a motor shaft, the motor shaft is fixedly sleeved with a rotor, the two axial sides of the rotor are provided with an upper stator and a lower stator respectively, and the motor shaft is sleeved with the upper stator and the lower stator; according to the axial magnetic flux motor, the upper stator and the lower stator are arranged on the two axial sides of the rotor respectively, the axial magnetic fields are generated through the two stators to drive the rotor to rotate, the power density of the motor is larger, the size is smaller, the weight is lighter, and the amount of used copper is smaller.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an axial flux motor. Background Art

[0002] In conventional motors, the stator windings are generally wound around the radial outside of the motor rotor, and the rotor is driven to rotate by radial magnetic flux.

[0003] Here we develop an axial flux motor. Summary of the Invention

[0004] In order to address the deficiencies in the prior art, the present invention provides an axial flux motor. The axial flux motor is configured with an upper stator and a lower stator on both axial sides of the rotor, and an axial magnetic field is generated by the two stators to drive the rotor to rotate. The motor has a higher power density, a smaller size, a lighter weight, and uses less copper.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides an axial flux motor, comprising a motor shaft, a rotor fixedly sleeved on the motor shaft, an upper stator and a lower stator respectively provided on axial sides of the rotor, and both the upper stator and the lower stator sleeved on the motor shaft;

[0007] The upper stator and the lower stator are provided with windings, and the windings generate an axial magnetic field.

[0008] The axial flux motor of the present invention is configured by arranging stators on both axial sides of a rotor, and the windings of the stators generate magnetic fields in the axial direction to drive the rotor to rotate.

[0009] The axial flux motor of the present invention provides an upper stator and a lower stator on both axial sides of the rotor, and generates an axial magnetic field through the two stators to drive the rotor to rotate. The motor has a higher power density, a smaller volume, a lighter weight, and uses less copper.

[0010] In a further technical solution, the windings of the upper stator and the lower stator are connected in series.

[0011] Compared to parallel stators, the advantages of connecting two stators in series include fewer magnetic circuit branches, lowering magnetic leakage, and improving magnetic circuit utilization. This is particularly true in applications such as permanent magnet synchronous motors, where the magnetic flux generated by the permanent magnets can be more effectively utilized. To generate the same magnetic field, less current is required, allowing for the use of thinner wires. This also results in a smaller size, lighter weight, less copper usage, and lower costs.

[0012] In a further technical solution, the invention further comprises an upper shell and a lower shell, wherein the upper shell and the lower shell respectively have a receiving cavity and can be relatively closed to form a complete shell, and the upper shell and the lower shell are respectively connected to the motor shaft through bearings;

[0013] The cavity formed by closing the upper shell and the lower shell is used to accommodate the upper stator, the lower stator and the rotor.

[0014] The split-shell design allows the upper stator and lower stator to be assembled with the upper shell and lower shell respectively during assembly, and then the motor shaft with the assembled rotor can be assembled together through docking, which greatly reduces the difficulty of assembly.

[0015] In a further technical solution, a wave washer is further provided on the motor shaft.

[0016] By arranging a wave washer on the motor shaft, the axial movement of objects on the shaft during the operation of the motor is reduced.

[0017] In a further technical solution, the upper shell and the lower shell each include an opposing surface, and the upper shell and the lower shell are respectively provided with a floating quick connector male end and a floating quick connector female end on the opposing surface;

[0018] The male end of the floating quick connector is connected to the winding of the upper stator, and the female end of the floating quick connector is connected to the winding of the lower stator.

[0019] On the basis of the combined assembly of the upper shell and the lower shell, a floating quick connector is provided for rapid line connection, which further simplifies the assembly operation, reduces the assembly time and improves production efficiency.

[0020] In a further technical solution, a cable connector is further provided on the upper shell or the lower shell, and the cable connector is connected to the upper stator or the lower stator.

[0021] The cables are connected through cable connectors for easy use.

[0022] In a further technical solution, the rotor includes a circular frame, and mounting grooves are respectively provided on both axial end surfaces of the circular frame. The mounting grooves are arranged in a circular array with the center of the circular frame as the center, and magnetic steel is provided in the mounting grooves.

[0023] The magnets are arranged on both sides of the circular frame to match the two stators and improve the torque of the motor.

[0024] The beneficial effects are:

[0025] 1. The axial flux motor of the present invention generates an axial magnetic field by arranging an upper stator and a lower stator on both axial sides of the rotor. The motor has a higher power density, a smaller volume, a lighter weight, and uses less copper.

[0026] 2. Compared to stators connected in parallel, the advantages of connecting two stators in series are fewer magnetic circuit branches, lower magnetic leakage, and higher magnetic circuit utilization. This is particularly true in applications such as permanent magnet synchronous motors, where the magnetic flux generated by the permanent magnets can be more effectively utilized. To generate the same magnetic field, the required current is smaller, allowing for the use of thinner wires. This also results in a smaller size, lighter weight, less copper usage, and lower cost.

[0027] 3. The split-shell design allows the upper stator and lower stator to be assembled with the upper shell and lower shell respectively during assembly, and then the motor shaft with the assembled rotor can be assembled together through docking, which greatly reduces the difficulty of assembly.

[0028] 4. By setting a wave washer on the motor shaft, the axial movement of objects on the shaft during the operation of the motor can be reduced.

[0029] 5. On the basis of the combined assembly of the upper shell and the lower shell, a floating quick connector is set for rapid line connection, which further simplifies the assembly operation, reduces the assembly time and improves production efficiency.

[0030] 6. The cable is connected through the cable connector for easy use.

[0031] 7. Set the magnets on both sides of the circular frame to match the two stators to increase the torque of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the internal structure of an axial flux motor according to an embodiment of the present invention;

[0033] Figure 2 1 is a schematic structural diagram of a floating quick connector of an axial flux motor according to an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the disassembled structure of the axial flux motor according to an embodiment of the present invention.

[0035] 10. Motor shaft; 20. Upper housing; 21. Upper stator; 22. Male end of floating quick connector; 23. Wave washer; 30. Lower housing; 31. Lower stator; 32. Female end of floating quick connector; 33. Cable connector; 40. Rotor; 50. Bearing. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings:

[0037] Example:

[0038] An axial flux motor, such as Figure 1 and Figure 3As shown, it includes a motor shaft 10, a rotor 40 is fixedly sleeved on the motor shaft 10, an upper stator 21 and a lower stator 31 are respectively provided on both axial sides of the rotor 40, and the upper stator 21 and the lower stator 31 are both sleeved on the motor shaft 10;

[0039] Windings are provided on the upper stator 21 and the lower stator 31 , and the windings generate an axial magnetic field.

[0040] The axial magnetic field is defined as a magnetic field parallel to the axial direction of the motor shaft 10 .

[0041] The axial flux motor of the present invention is configured by disposing stators on both axial sides of the rotor 40 , and the windings of the stators generate magnetic fields in the axial direction to drive the rotor 40 to rotate.

[0042] The axial flux motor of the present invention generates an axial magnetic field by arranging an upper stator 21 and a lower stator 31 on both axial sides of the rotor 40. The two stators have a higher power density, a smaller volume, a lighter weight, and uses less copper.

[0043] In another embodiment, the windings of the upper stator 21 and the lower stator 31 are connected in series.

[0044] Compared to parallel stators, the advantages of connecting two stators in series include fewer magnetic circuit branches, lowering magnetic leakage, and improving magnetic circuit utilization. This is particularly true in applications such as permanent magnet synchronous motors, where the magnetic flux generated by the permanent magnets can be more effectively utilized. To generate the same magnetic field, less current is required, allowing for the use of thinner wires. This also results in a smaller size, lighter weight, less copper usage, and lower costs.

[0045] In another embodiment, Figure 1 and Figure 3 As shown, it also includes an upper shell 20 and a lower shell 30, the upper shell 20 and the lower shell 30 respectively have a receiving cavity and can be relatively closed to form a complete shell, and the upper shell 20 and the lower shell 30 are respectively connected to the motor shaft 10 through bearings 50;

[0046] The cavity formed by closing the upper shell 20 and the lower shell 30 is used to accommodate the upper stator 21 , the lower stator 31 and the rotor 40 .

[0047] The split shell design allows for assembly by first assembling the upper stator 21 and the lower stator 31 with the upper shell 20 and the lower shell 30 respectively, and then assembling the motor shaft 10 with the rotor 40 assembled therewith by docking, which greatly reduces the difficulty of assembly.

[0048] The edges of the upper shell 20 and the lower shell 30 are respectively provided with connecting ears for connection, and the connecting ears are provided with connecting holes;

[0049] The upper shell 20 is provided with a raised edge on the circumferential direction of the edge of the surface connected to the lower shell 30, and the lower shell 30 is provided with a corresponding recessed edge on the circumferential direction of the edge of the surface connected to the upper shell 20. The combination of the two ensures that after the upper shell 20 and the lower shell 30 are assembled, their edges are tightly combined and the structural tightness is better. At the same time, sealing strips are also provided at the above-mentioned recessed edges and recessed edges, and the sealing strips make the joint between the upper shell 20 and the lower shell 30 able to be sealed.

[0050] In another embodiment, Figure 1 As shown, a wave washer 23 is also provided on the motor shaft 10 .

[0051] By arranging the wave washer 23 on the motor shaft 10 , the axial movement of the object on the shaft during the operation of the motor is reduced.

[0052] In another embodiment, Figure 1 and Figure 3 As shown, the upper shell 20 and the lower shell 30 respectively include an opposing surface, and the upper shell 20 and the lower shell 30 are respectively provided with a floating quick connector male end 22 and a floating quick connector female end 32 on the opposing surface;

[0053] The floating quick connector male end 22 is connected to the winding of the upper stator 21 , and the floating quick connector female end 32 is connected to the winding of the lower stator 31 .

[0054] like Figure 2 As shown, the floating quick connector male end 22 includes a connector contact, which is embedded in the base, and a spring is provided between the connector contact and the inner wall of the base, so that the connector contact has the force to extend outward, and the floating quick connector female end 32 includes a connector arc panel, whose position and number correspond to the connector contact. When the upper shell 20 and the lower shell 30 are assembled relative to each other, the floating quick connector male end 22 and the floating quick connector female end 32 are aligned, and the connector contact of the floating quick connector male end 22 contacts the connector arc panel of the floating quick connector female end 32 to achieve conductivity. The spring behind the connector contact provides pressure for the combination of the two, so that the connection will not be disconnected due to factors such as vibration, thereby ensuring power supply.

[0055] On the basis of the combined assembly of the upper shell 20 and the lower shell 30, a floating quick connector is provided for rapid line connection, which further simplifies the assembly operation, reduces the assembly time, and improves production efficiency.

[0056] In another embodiment, Figure 1 and Figure 3 As shown, a cable connector 33 is further provided on the upper shell 20 or the lower shell 30 , and the cable connector 33 is connected to the upper stator 21 or the lower stator 31 .

[0057] The cable is connected via the cable connector 33 for easy use.

[0058] In a further technical solution, the rotor 40 includes a circular frame, and mounting grooves are respectively provided on both axial end surfaces of the circular frame. The mounting grooves are arranged in a circular array with the center of the circular frame as the center, and magnets are provided in the mounting grooves.

[0059] In another embodiment, a rubber pad is provided on the cable connector 33;

[0060] By providing a rubber pad to seal the cable connector 33, the safety of the connection line is further improved.

[0061] In another embodiment, Figure 1 As shown, the lower shell 30 is closed at the position corresponding to the motor shaft 10, and the upper shell 20 is open at the position corresponding to the motor shaft 10, that is, one end of the motor shaft 10 extends outward from the upper shell 20, and outputs power to the outside from this end;

[0062] like Figure 1 and Figure 3 As shown, in this embodiment, an oil seal is provided at the outlet of the motor shaft 10 corresponding to the upper shell 20. The oil seal sleeve is arranged on the motor shaft 10. One end of the motor shaft is closed and the other end is matched with the oil seal, thereby achieving sealing and waterproofing of the motor itself and further improving the safety of the motor.

[0063] The magnets are arranged on both sides of the circular frame to match the two stators and improve the torque of the motor.

[0064] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. An axial flux motor, characterized in that: The motor comprises a motor shaft, a rotor is fixedly sleeved on the motor shaft, an upper stator and a lower stator are respectively provided on both axial sides of the rotor, and the upper stator and the lower stator are sleeved on the motor shaft; The upper stator and the lower stator are provided with windings, and the windings generate an axial magnetic field.

2. The axial flux motor according to claim 1, characterized in that The windings of the upper stator and the lower stator are connected in series.

3. The axial flux motor according to claim 1 or 2, characterized in that: The upper shell and the lower shell each have a receiving cavity and can be relatively closed to form a complete housing, and the upper shell and the lower shell are respectively connected to the motor shaft through bearings; The cavity formed by closing the upper shell and the lower shell is used to accommodate the upper stator, the lower stator and the rotor.

4. The axial flux motor according to claim 3, characterized in that A wave washer is also provided on the motor shaft.

5. The axial flux motor according to claim 3, characterized in that The upper shell and the lower shell each include an opposing surface, and the upper shell and the lower shell are respectively provided with a floating quick connector male end and a floating quick connector female end on the opposing surface; The male end of the floating quick connector is connected to the winding of the upper stator, and the female end of the floating quick connector is connected to the winding of the lower stator.

6. The axial flux motor according to claim 5, characterized in that The upper shell or the lower shell is further provided with a cable connector, and the cable connector is connected to the upper stator or the lower stator.

7. The axial flux motor according to claim 1, characterized in that The rotor includes a circular frame, and both axial end surfaces of the circular frame are respectively provided with placement grooves. The placement grooves are arranged in a ring array with the center of the circular frame as the center, and magnetic steel is arranged in the placement grooves.

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