Axial flux motor

Abstract

An axial magnetic flux motor disclosed by the present invention comprises a stator (1) and a rotor (2), the stator (1) comprises a stator skeleton (3), a plurality of stator teeth (4) are distributed on the stator skeleton (3), the stator teeth (4) and the stator skeleton (3) are arranged in a mutually perpendicular manner, a stator winding (5) is wound outside the stator teeth (4), and the rotor (2) comprises a rotor shell (6). A plurality of permanent magnets (7) are annularly distributed on the periphery of one side, close to the stator (1), of the rotor shell (6), the stator framework (3) is detachably connected with a stator yoke (8), the stator teeth (4) are annularly distributed on the periphery of the stator yoke (8) and are connected with the stator yoke (8) in a buckled mode, the outer portion of each stator tooth (4) is connected with an insulation sleeve (9) in a buckled mode, and the stator windings (5) are wound on the outer portions of the insulation sleeves (9). The method has the characteristics of high processing efficiency and low processing cost.

Description

Technical Field

[0001] The invention relates to a household motor, in particular to an axial flux motor. Background Art

[0002] At present, the motors used in household appliances such as washing machines are generally radial flux motors, but due to the limitations of their electromagnetic structure, the efficiency of radial flux motors is relatively low and cannot meet the performance requirements of manufacturers for household motors. On this basis, with the gradual rise of new energy vehicles, axial flux motors used in new energy vehicles have been favored by various household appliance manufacturers due to their higher motor efficiency and more compact motor structure. This makes how to apply axial flux motors in the field of household appliances a research and development goal for various household appliance manufacturers.

[0003] The defect of the existing axial flux motor is that the conventional processing method for the stator core in the axial flux motor is to first stamp the long silicon steel sheet, so that the silicon steel sheet forms a number of tooth-shaped sheets with different spacings and connected in sequence after stamping, and then the silicon steel sheet is rolled into a circle, so that each tooth-shaped sheet corresponding to any stator tooth can be radially fitted in sequence after winding to form a tooth-shaped structure. However, on the one hand, this processing method has low processing efficiency, and the silicon steel sheet needs to be wound for a long time to be formed; on the other hand, because the spacing between adjacent tooth-shaped sheets on the silicon steel sheet needs to change with its radial winding position, the structure will also greatly increase the manufacturer's stamping difficulty and the precision requirements of the tooth-shaped sheet. Once there is an error in the spacing between two tooth-shaped sheets, it will cause all the subsequent tooth-shaped sheets to be misaligned during winding, and the manufacturer cannot perform subsequent repairs after the misalignment problem occurs. This greatly increases the processing time and processing cost of the axial flux motor, making it difficult to apply it to the field of household motors.

[0004] Therefore, the existing axial flux motor has the problems of low processing efficiency and high processing cost. Summary of the invention

[0005] The object of the present invention is to provide an axial flux motor having the characteristics of high processing efficiency and low processing cost.

[0006] The technical solution of the present invention is as follows: an axial flux motor comprises a stator and a rotor, wherein the stator comprises a stator frame, a plurality of stator teeth are distributed on the stator frame, the stator teeth and the stator frame are arranged perpendicular to each other, and a stator winding is wound around the outside of the stator teeth; the rotor comprises a rotor shell, and a plurality of permanent magnets are distributed in a ring shape around the rotor shell near one side of the stator; a stator yoke is detachably connected to the stator frame, the stator teeth are distributed in a ring shape around the stator yoke and are buckled and connected to the stator yoke, an insulating sleeve is buckled and connected to the outside of each stator tooth, and the stator winding is wound around the outside of the insulating sleeve.

[0007] In the aforementioned axial flux motor, a plurality of first reinforcing ribs are distributed on one side of the stator frame, and mounting grooves are formed between adjacent first reinforcing ribs. The stator yoke is snap-fitted into the mounting grooves and is screwed to the stator frame.

[0008] In the aforementioned axial flux motor, a plurality of inwardly protruding limiting plates are distributed in a ring shape on the inner side of the stator yoke, each limiting plate is provided with a mounting hole for a matching screw, and the limiting plates and the mounting grooves are interlocked with each other.

[0009] In the aforementioned axial flux motor, the stator frame is provided with a plurality of second reinforcing ribs on a side away from the stator frame, and the middle part of the second reinforcing ribs forms a sleeve that fits the screw.

[0010] In the aforementioned axial flux motor, a plurality of slots are distributed in a ring shape around the stator yoke, and the ends of the stator teeth are buckled and connected to the slots via clamping blocks.

[0011] In the aforementioned axial flux motor, the stator teeth form a cover plate at one end away from the stator yoke, and the insulating sleeve includes two separate sub-sleeve bodies, the outer ends of the two sub-sleeve bodies are buckled and connected to the outside of the cover plate and plugged into each other.

[0012] Compared with the prior art, the present invention has the following characteristics:

[0013] (1) The present invention enables manufacturers to process each stator tooth separately through the structural coordination of the stator frame, stator yoke and stator teeth, and connect the stator teeth to the stator yoke by snapping and welding, which can effectively improve the processing efficiency and reduce the processing cost compared with the existing processing method of the stator core;

[0014] (2) By defining the structure of the insulating sleeve, each insulating sleeve can be processed separately and fastened on the stator teeth, thereby facilitating assembly by operators while ensuring its insulation function;

[0015] (3) By limiting the structure of the stator frame, on the one hand, the stator frame can be reinforced by the cooperation of the first reinforcing rib and the second reinforcing rib, thereby improving the structural strength and anti-deformation ability of the stator frame; on the other hand, the stator yoke can be buckled and connected to the stator frame through the installation groove, so that the stator yoke is circumferentially limited by the stator frame, thereby ensuring the structural stability and positioning accuracy of the stator yoke;

[0016] Therefore, the present invention has the characteristics of high processing efficiency and low processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the appearance diagram of the present invention on one side;

[0018] Figure 2is the profile view of the present invention on the other side;

[0019] Figure 3 It is the outline diagram of the stator;

[0020] Figure 4 is a cross-sectional view of the stator;

[0021] Figure 5 It is a schematic diagram of the connection between stator teeth, stator yoke and stator frame.

[0022] The marks in the accompanying drawings are: 1-stator, 2-rotor, 3-stator frame, 4-stator teeth, 5-stator winding, 6-rotor shell, 7-permanent magnet, 8-stator yoke, 9-insulating sleeve, 10-first reinforcing rib, 11-installing groove, 12-limiting plate, 13-second reinforcing rib, 14-sleeve, 15-slot, 16-cover plate. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0024] Embodiment 1. An axial flux motor, comprising: Figure 1 As shown, it includes a stator 1 and a rotor 2, wherein the stator 1 includes a stator frame 3, on which a plurality of stator teeth 4 are distributed, the stator teeth 4 and the stator frame 3 are arranged perpendicular to each other, and the stator winding 5 is wound around the outside of the stator teeth 4, and the rotor 2 includes a rotor shell 6, which is arranged side by side up and down between the rotor shell 6 and the stator frame 3, and the rotor shell 6 is annularly distributed around one side of the stator 1 with a plurality of permanent magnets 7 matching the stator teeth 4, and the stator frame 3 is detachably connected with a stator yoke 8, the stator teeth 4 are annularly distributed around the stator yoke 8 and are buckled and connected to the stator yoke 8, the outside of each stator tooth 4 is buckled and connected with an insulating sleeve 9, the insulating sleeves 9 on the outsides of adjacent stator teeth 4 are separated from each other, and the stator winding 5 is wound around the outside of the insulating sleeve 9.

[0025] The stator teeth 4 can be formed by stamping tin steel sheets, or can be formed by processing SMC soft magnetic composite materials through powder metallurgy technology; the stator yoke 8 can be formed by stamping tin steel sheets.

[0026] The stator yoke 8 is formed by a plurality of stator yoke pieces distributed in a ring shape and connected end to end, and adjacent stator yoke pieces 8 are interlocked with each other via dovetail grooves and welded into shape.

[0027] A plurality of first reinforcing ribs 10 are distributed on one side of the stator frame 3 , and mounting grooves 11 are formed between adjacent first reinforcing ribs 10 . The stator yoke 8 is snap-fitted into the mounting grooves 11 and is screwed to the stator frame 3 .

[0028] The inner side of the stator yoke 8 is provided with a plurality of inwardly protruding limiting plates 12 in a ring shape, each limiting plate 12 is provided with a mounting hole for a matching screw, the limiting plates 12 and the mounting grooves 11 are interlocked, and the mounting grooves 11 are used to circumferentially limit the stator yoke 8 after the limiting plates 12 are engaged.

[0029] The stator frame 3 has a plurality of second reinforcing ribs 13 distributed on the side away from the stator frame 3 , and a sleeve 14 for fitting the screw is formed in the middle of the second reinforcing rib 13 . The first reinforcing rib 10 , the second reinforcing rib 13 , the sleeve 14 and the stator frame 3 are integrally injection molded.

[0030] The stator yoke 8 is provided with a plurality of slots 15 distributed in a ring shape around it. The ends of the stator teeth 4 are snap-fitted into the slots 15 via snap blocks. The snap blocks and the slots 15 are interference fit. The stator teeth 4 and the stator yoke 8 are fixed by welding after being plugged into each other.

[0031] The stator teeth 4 form a cover plate 16 at one end away from the stator yoke 8, and the insulating sleeve 9 includes two split sub-sleeves, one end of the two sub-sleeves forms a bottom plate for limiting the stator winding 5, and the other ends of the two sub-sleeves are buckled and connected to the outside of the cover plate 16 and plugged into each other.

[0032] Working principle of the present invention: The present invention defines the connection structure of the stator frame 3, stator teeth 4 and stator yoke 8, so that during processing, the stator teeth 4 and stator yoke 8 can be processed and formed separately first, and then the two are pressed and welded to form the stator core structure of the axial flux motor. Compared with the existing method of rolling silicon steel sheets, this method can save the corresponding rolling process and keep the shape of each stator tooth consistent, thereby effectively reducing the difficulty and cost of processing the stator core for manufacturers.

[0033] After the stator core is formed, the stator yoke 8 is buckled into the mounting groove 11 of the stator frame 3 and fixed by screws. Then, the insulating sleeve 9 is sleeved on the outside of each stator tooth 4, and the stator winding 5 is wound on the outside of the insulating sleeve 9, so as to form the motor stator 1. The manufacturer can also sleeve the insulating sleeve 9 on the outside of the stator tooth 4 according to the installation requirements, and then buckle the stator tooth 4 together with the insulating sleeve 9 on the stator yoke 8, which can also achieve the effect of rapid assembly of the stator.

[0034] Embodiment 2. An axial flux motor, comprising: Figure 1As shown, it includes a stator 1 and a rotor 2, wherein the stator 1 includes a stator frame 3, on which a plurality of stator teeth 4 are distributed, the stator teeth 4 and the stator frame 3 are arranged perpendicular to each other, and a stator winding 5 is wound around the outside of the stator teeth 4, and the rotor 2 includes a rotor shell 6, which is arranged side by side up and down between the rotor shell 6 and the stator frame 3, and the rotor shell 6 is annularly distributed with a plurality of permanent magnets 7 matching the stator teeth 4 around one side close to the stator 1, and a stator yoke 8 is detachably connected to the stator frame 3, the stator teeth 4 are annularly distributed around the stator yoke 8 and are buckled and connected to the stator yoke 8, and the outside of the stator teeth 4 are buckled and connected with an insulating sleeve 9, and the stator winding 5 is wound around the outside of the insulating sleeve 9, and the stator windings 5 ​​outside each stator tooth 4 are mutually connected through the insulating sleeve 9 to form an integrated structure.

[0035] The stator teeth 4 can be formed by stamping tin steel sheets, or can be formed by processing SMC soft magnetic composite materials through powder metallurgy technology; the stator yoke 8 can be formed by stamping tin steel sheets.

[0036] The stator yoke 8 is formed by a plurality of stator yoke pieces distributed in a ring shape and connected end to end, and adjacent stator yoke pieces 8 are interlocked with each other via dovetail grooves and welded into shape.

[0037] A plurality of first reinforcing ribs 10 are distributed on one side of the stator frame 3 , and mounting grooves 11 are formed between adjacent first reinforcing ribs 10 . The stator yoke 8 is snap-fitted into the mounting grooves 11 and is screwed to the stator frame 3 .

[0038] The inner side of the stator yoke 8 is provided with a plurality of inwardly protruding limiting plates 12 in a ring shape, each limiting plate 12 is provided with a mounting hole for a matching screw, the limiting plates 12 and the mounting grooves 11 are interlocked, and the mounting grooves 11 are used to circumferentially limit the stator yoke 8 after the limiting plates 12 are engaged.

[0039] The stator frame 3 has a plurality of second reinforcing ribs 13 distributed on the side away from the stator frame 3 , and a sleeve 14 for fitting the screw is formed in the middle of the second reinforcing rib 13 . The first reinforcing rib 10 , the second reinforcing rib 13 , the sleeve 14 and the stator frame 3 are integrally injection molded.

[0040] The stator yoke 8 is provided with a plurality of slots 15 distributed in a ring shape around it. The ends of the stator teeth 4 are snap-fitted into the slots 15 via snap blocks. The snap blocks and the slots 15 are interference fit. The stator teeth 4 and the stator yoke 8 are fixed by welding after being plugged into each other.

[0041] The stator teeth 4 form a cover plate 16 at one end away from the stator yoke 8 , and the insulating sleeve 9 is located at the interval between the cover plate 16 and the stator yoke 8 .

[0042] During processing, the stator winding 5 is first wound on the outside of the winding mold, and then the stator winding 5 is demolded and an insulating sleeve 9 is wrapped on the outside of the stator winding 5 by injection molding, so that the insulating sleeve 9 can connect and fix the winding coils to each other after molding to form an integrated winding structure; when the stator teeth 4 and the stator yoke 8 are plugged in, each stator tooth 4 is passed through the winding structure and fastened to the stator yoke 8 by external equipment, so that the stator yoke 8 and the stator teeth 4 can squeeze and fix the winding structure from the upper and lower sides after welding to achieve an assembly effect.

[0043] Compared with Example 1, this embodiment further adjusts the processing method of the stator winding 5, by first winding the stator winding 5 on the winding mold, and then plastic-coating the outside of the stator winding 5 to form an insulating sleeve 9, so that the insulating sleeve 9 can fix the stator winding 5 after molding, that is, forming an integrated winding structure. When the winding structure needs to be installed, the manufacturer can buckle and mold the winding structure together with the stator teeth 4 and the stator yoke 8, and use the mutual welding of the stator teeth 4 and the stator yoke 8 to limit the winding structure, thereby facilitating the manufacturer's processing while ensuring the connection stability of each component.

Claims

1. An axial flux motor, comprising a stator (1) and a rotor (2), wherein the stator (1) comprises a stator frame (3), a plurality of stator teeth (4) are distributed on the stator frame (3), the stator teeth (4) and the stator frame (3) are arranged perpendicular to each other, a stator winding (5) is wound around the stator teeth (4), and the rotor (2) comprises a rotor shell (6), a plurality of permanent magnets (7) are distributed in an annular shape around the rotor shell (6) on a side close to the stator (1), characterized in that: The stator frame (3) is detachably connected to a stator yoke (8); the stator teeth (4) are distributed in a ring shape around the stator yoke (8) and are buckled and connected to the stator yoke (8); the outside of each stator tooth (4) is buckled and connected to an insulating sleeve (9); and the stator winding (5) is wound around the outside of the insulating sleeve (9).

2. The axial flux motor according to claim 1, characterized in that: A plurality of first reinforcing ribs (10) are distributed on one side of the stator frame (3), and mounting grooves (11) are formed between adjacent first reinforcing ribs (10). The stator yoke (8) is snap-fitted into the mounting grooves (11) and is screw-connected to the stator frame (3).

3. The axial flux motor according to claim 2, characterized in that: The inner side of the stator yoke (8) is provided with a plurality of inwardly protruding limiting plates (12) in an annular shape, each limiting plate (12) is provided with a mounting hole for a matching screw, and the limiting plates (12) and the mounting grooves (11) are interlocked.

4. The axial flux motor according to claim 2, characterized in that: The stator frame (3) is provided with a plurality of second reinforcing ribs (13) on a side away from the stator frame (3), and a sleeve (14) for matching the screw is formed in the middle of the second reinforcing ribs (13).

5. The axial flux motor according to claim 1, characterized in that: A plurality of slots (15) are distributed in an annular manner around the stator yoke (8), and the ends of the stator teeth (4) are buckled and connected to the slots (15) via clamping blocks.

6. The axial flux motor according to claim 1, characterized in that: The stator teeth (4) form a cover plate (16) at one end away from the stator yoke (8), and the insulating sleeve (9) comprises two separate sleeve bodies, the outer ends of the two separate sleeve bodies are buckled and connected to the outside of the cover plate (16) and plugged into each other.

Images