A stator fixing structure for a single-stator dual-rotor axial flux motor

Abstract

The present invention provides a stator fixing structure for a single-stator, dual-rotor axial flux motor, belonging to the technical field of axial flux motors. The structure comprises a stator winding unit, a motor housing, and an inner ring. The inner ring is disposed inside the motor housing. A plurality of spaced ribs are fixedly disposed on the inner side of the motor housing. A potting ring is formed between two adjacent groups of ribs. The potting ring is used to pot the resin layer to achieve a fixed connection between the stator winding unit and the motor housing. The present invention has a simple structure, is easy to process, and has excellent electrical insulation properties. Furthermore, the finished motor structure, effectively connected through internal consolidation, has a smooth surface without holes, maintaining the motor's aesthetic appearance and safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of axial flux motors, and in particular relates to a stator fixing structure of a single-stator dual-rotor axial flux motor. Background Art

[0002] With the development of axial flux motors, more and more manufacturers have begun using them, particularly single-stator, dual-rotor axial flux motors. However, the existing mechanical stator fixation method for single-stator, dual-rotor axial flux motors uses screw-locked clamps to compress the stator winding monomers. This structure is cumbersome. In addition, as the motor size decreases, the locking screws also need to be smaller, which cannot guarantee that the stator winding monomers can be compressed. During motor operation, the stator winding monomers are easily sucked out by magnetic pull. This then causes friction between the stator core and the rotor disk, ultimately damaging the entire motor. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a fixing structure for the stator of a single-stator dual-rotor axial flux motor, so that the fixed single-stator dual-rotor axial flux motor structure has good vibration resistance, good electrical insulation, uniform air gap, and improves the stability of the motor.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A fixed structure of a stator of a single-stator dual-rotor axial flux motor comprises a stator winding monomer, a motor housing and an inner ring.

[0006] The inner ring is arranged inside the motor housing,

[0007] The inner side of the motor housing is fixedly provided with a plurality of spaced ribs, and a potting ring is formed between two adjacent groups of ribs.

[0008] The potting ring is used to pot the resin layer to achieve a fixed connection between the stator winding monomer and the motor housing.

[0009] As a further improvement of the present invention: the potting ring is a circular groove recessed into the motor housing,

[0010] The potting ring is arranged at the middle position of the motor housing in the axial direction, and its width is 1 / 4 of the height of the motor housing.

[0011] As a further improvement of the present invention: the number of the rib features is the same as the number of stator winding monomers, one stator winding monomer is arranged between every two raised ribs, and a glue coating gap is provided between the raised ribs and the stator winding monomers.

[0012] As a further improvement of the present invention: a plurality of potting holes are provided on the inner ring, and the potting holes are evenly distributed on the inner ring in groups of four in the axial direction.

[0013] As a further improvement of the present invention: the stator winding unit includes a winding and a stator core arranged on one side of the winding.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Since the inner side of the motor housing is provided with an inwardly recessed potting ring and raised ribs, the inner side serves as the mounting and fixing surface. The motor housing and the inner ring surround all stator winding monomers. The stator winding monomers are first glued to the raised rib features with glue and then potted with resin. Due to the presence of the potting ring and rib features, the surface area of ​​the inner side of the motor housing is increased, so that the entire motor housing, stator winding monomers, inner ring and resin layer are integrated into one, and the strength is greatly enhanced.

[0016] At the same time, the inner surface of the motor housing and the outer surface of the inner ring are polished surfaces, which increases the roughness of the surface, enhances the adhesion between the motor housing, inner ring and stator winding monomer, and further ensures the stability and integration of the motor structure.

[0017] The present invention also has the characteristics of simple structure, easy processing, and good electrical insulation performance. At the same time, the completed motor structure is effectively connected through internal consolidation, so the surface is smooth and has no holes, maintaining the beauty and safety of the motor appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 Schematic diagram of the structure of the motor housing in the present invention;

[0020] Figure 3 Schematic diagram of the structure of the stator winding monomer in the present invention;

[0021] Figure 4 It is a structural schematic diagram of the inner ring in the present invention. DETAILED DESCRIPTION

[0022] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0023] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] See also Figure 1 and Figure 2 This embodiment provides a fixed structure for the stator of a single-stator dual-rotor axial flux motor, including a stator winding monomer 3, a motor housing 1, and an inner ring 4. The inner ring 4 is arranged on the inner side of the motor housing 1. A plurality of spaced ribs 5 are fixedly arranged on the inner side of the motor housing 1. A potting ring 6 is formed between two adjacent groups of the ribs 5. The resin layer 2 is potted in the potting ring 6 to achieve a fixed connection between the stator winding monomer 3 and the motor housing 1.

[0025] By potting the resin layer 2 into the potting ring 6 , the stator winding unit 3 is fixedly connected to the motor housing 1 .

[0026] See also Figure 2 In one embodiment, the potting ring 6 is a circular groove recessed into the motor housing 1. The potting ring 6 is arranged in the middle position of the motor housing 1 in the axial direction, and its width is about 1 / 4 of the height of the motor housing. The potting ring 6 is recessed into the motor housing 1. During potting, the resin is embedded in the circular groove, so that all the stator winding monomers 3 and the resin covering the stator winding monomers 3 form a whole, effectively preventing the motor stator as a whole from axially moving in the motor housing 1, thereby improving the structural strength of the motor.

[0027] See also Figure 2 In one embodiment, the number of the rib features 5 is the same as the number of the stator winding monomers 3, and one stator winding monomer 3 is arranged between every two raised rib features 5. A certain glue coating gap is provided between the raised rib features 5 and the stator winding monomers 3. Before the resin is poured, all the stator winding monomers 3 are first glued to the raised rib features 5 in sequence with glue, and finally poured with resin, so that all the stator winding monomers 3 and the resin covering the stator winding monomers form a gear-shaped whole, which fits tightly with the motor housing, effectively preventing the motor stator as a whole from slipping and rotating around the axis in the motor housing 1.

[0028] See also Figure 4 In one embodiment, a plurality of potting holes 9 are provided on the inner ring 4. The potting holes 9 are evenly distributed on the inner ring 4 in groups of four in the axial direction. During potting, the resin fills all the potting holes 9 to improve the strength of the bonding.

[0029] The inner surface of the motor housing 1 and the outer surface of the inner ring 4 are polished surfaces, which increase the roughness of the surface, thereby enhancing the adhesion between the motor housing 1, the inner ring 4 and the stator winding monomer 3, further ensuring the stability and integration of the motor structure.

[0030] Before glue pouring, each stator winding monomer 3 is connected together by wire welding according to design requirements. Then, each stator winding monomer 3 is evenly distributed in the motor housing 1 through tooling. The insulation between the wire and the stator core and between the wire and the motor housing 1 is checked. Finally, resin is poured into the cavity formed by the inner ring 4, the motor housing 1 and the tooling. The glue pouring liquid level should be 1 to 2 mm lower than the stator surface. Since all the wire welding points are immersed in the resin, the electrical insulation performance of the motor is guaranteed.

[0031] See also Figure 3 In one embodiment, the stator winding unit 3 includes a winding 8 and a stator core 7 arranged on one side of the winding 8 .

[0032] The above describes in detail the preferred embodiments of this patent, but this patent is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A stator fixing structure of a single-stator dual-rotor axial flux motor, characterized in that: Including stator winding monomer, motor housing and inner ring, The inner ring is arranged inside the motor housing, The inner side of the motor housing is fixedly provided with a plurality of spaced ribs, and a potting ring is formed between two axially adjacent groups of the ribs. The potting ring is a circular groove recessed into the motor housing. The potting ring is used for potting a resin layer to achieve a fixed connection between the stator winding monomer and the motor housing.

2. The fixing structure of the stator of the single-stator dual-rotor axial flux motor according to claim 1, characterized in that: The potting ring is arranged at the middle position of the motor housing in the axial direction, and its width is 1 / 4 of the height of the motor housing.

3. The fixing structure of the stator of the single-stator dual-rotor axial flux motor according to claim 1, characterized in that: The number of the circumferential ribs is the same as the number of the stator winding monomers. One stator winding monomer is arranged between every two raised ribs, and a glue coating gap is provided between the raised ribs and the stator winding monomers.

4. The fixing structure of the stator of a single-stator dual-rotor axial flux motor according to claim 1, characterized in that: The inner ring is provided with a plurality of potting holes, and the potting holes are evenly distributed on the inner ring in groups of four in the axial direction.

5. The fixing structure of the stator of a single-stator dual-rotor axial flux motor according to claim 1, characterized in that: The stator winding unit includes a winding and a stator core arranged on one side of the winding.

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