Disc type motor without rotor end cover

Abstract

The utility model discloses a disc type motor without a rotor end cover, which comprises a stator assembly (1) and a rotor assembly (2), the stator assembly (1) is axially and magnetically coupled with the rotor assembly (2), the stator assembly (1) comprises a stator end cover (11), a stator iron core (12) and a coil winding (13), the rotor assembly (2) comprises a rotating shaft (21), a rotor iron core (22), magnetic steel (23) and an injection molding body (24), the rotor iron core (22) and the magnetic steel (23) are injection-molded into a whole by the injection molding body (24), and the coil winding (13) is arranged on the rotor assembly (2). A bearing chamber (14) is formed in the middle of the stator end cover (11), a bearing (3) is installed in the bearing chamber (14), a rotating shaft (21) is installed on the bearing (3) in a supporting mode, and the motor is characterized in that labyrinth sealing structures are arranged on the end faces, opposite to the periphery of the injection molding body (24), of the stator end cover (11). The waterproof and dustproof performance grade of the rotor-free end cover disc type motor is improved, and the requirements of customers are met.

Description

Technical field:

[0001] The utility model relates to a disc-type motor without a rotor end cover. Background technology:

[0002] Disc motors are also called axial flux motors. Disc motors in the prior art are increasingly being used because of their high power density, light weight, and small size, such as in traction motors for new energy vehicles. Figure 1 As shown, the rotor assembly of the disc motor includes a rotor end cover, a magnet, a rotor core, a rotating shaft and a potting compound. The rotor end cover is made of metal, and the rotating shaft passes through the rotor end cover and extends out of the motor to connect to the load. The potting compound connects the rotor end cover, the magnet, the rotor core and the rotating shaft together. In this existing motor structure, the motor as a whole is mostly assembled in the form of multiple parts. However, the current disc motor has the following problems: 1. The disc motor has too many parts, resulting in low production efficiency; 2. Too many parts increase resonance, which in turn causes the overall noise of the motor to be larger; Patent No. CN201910071653, named vehicle, disc motor rotor and disc motor, the technical solution proposed has better solved the above technical problems, but there are still the following shortcomings: the waterproof and dustproof performance level is low and cannot meet customer requirements. Summary of the invention:

[0003] The utility model aims to provide a disc motor without rotor end cover, which can solve the technical problem that the disc motor without rotor end cover in the prior art has low waterproof and dustproof performance level and cannot meet customer requirements.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A disc-type motor without a rotor end cover comprises a stator assembly and a rotor assembly, wherein the stator assembly is axially magnetically coupled with the rotor assembly, wherein the stator assembly comprises a stator end cover, a stator core and a coil winding, and the rotor assembly comprises a rotating shaft, a rotor core, a magnetic steel and an injection molded body, wherein the injection molded body is formed by injection molding the rotor core and the magnetic steel into one body, a bearing chamber is formed in the middle of the stator end cover, a bearing is installed in the bearing chamber, and the rotating shaft support is installed on the bearing, and is characterized in that: a labyrinth sealing structure is provided on the end faces opposite to the outer periphery of the stator end cover and the injection molded body.

[0006] A first annular groove is dug on the outer end face of the stator end cover, a first annular outer baffle plate and a first annular inner baffle plate are formed on both sides of the first annular groove, a second annular groove is dug on the outer end face of the injection molded body, a second annular outer baffle plate and a second annular inner baffle plate are formed on both sides of the second annular groove, the top of the first annular outer baffle plate is embedded in the second annular groove, and the top of the second annular inner baffle plate is embedded in the first annular groove, thereby forming a labyrinth sealing structure.

[0007] The rotating shaft extends downward from the middle of the injection molded body and is supported and installed on the bearing.

[0008] The rotating shaft is integrally formed with the rotor core and the magnetic steel by injection molding, and the injection molding body and the rotating shaft are plastic-sealed as a whole.

[0009] A load connection boss is arranged in the middle of the top of the injection molding body.

[0010] The above-mentioned stator end cover is made of metal material.

[0011] Compared with the prior art, the utility model has the following effects:

[0012] Effect 1: A labyrinth seal structure is provided on the end faces opposite to the stator end cover and the periphery of the injection molded body, which improves the waterproof and dustproof performance level of the disc motor without rotor end cover and meets customer requirements;

[0013] Effect 2: A load connection boss is set in the middle of the top of the injection molded body, and there is no need for the shaft to extend to connect the load, which simplifies the structure, reduces costs, and reduces the overall noise of the motor. Description of the drawings:

[0014] Figure 1 This is a structural cross-sectional view of a disc motor in the prior art.

[0015] Figure 2 It is a three-dimensional diagram of the disc motor of the utility model at one angle;

[0016] Figure 3 It is a front view of the disc motor of the utility model;

[0017] Figure 4 yes Figure 3 AA section view;

[0018] Figure 5 yes Figure 4 BB cross-sectional view;

[0019] Figure 6 yes Figure 4 A partial enlarged view of part C. Specific implementation method:

[0020] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0021] Embodiment 1:

[0022] like Figures 2 to 6As shown, the present embodiment provides a disc-type motor without a rotor end cover, comprising a stator assembly 1 and a rotor assembly 2, wherein the stator assembly 1 is axially magnetically coupled with the rotor assembly 2, wherein the stator assembly 1 comprises a stator end cover 11, a stator core 12 and a coil winding 13, and the rotor assembly 2 comprises a rotating shaft 21, a rotor core 22, a magnetic steel 23 and an injection molded body 24, wherein the injection molded body 24 is formed by injection molding the rotor core 22 and the magnetic steel 23 into one body, a bearing chamber 14 is formed in the middle of the stator end cover 11, a bearing 3 is installed in the bearing chamber 14, and the rotating shaft 21 is supported and installed on the bearing 3, and is characterized in that: a labyrinth sealing structure is provided on the end faces opposite to the outer periphery of the stator end cover 11 and the injection molded body 24. A labyrinth sealing structure is provided on the end faces opposite to the stator end cover 11 and the outer periphery of the injection molded body 24 to improve the waterproof and dustproof performance level of the disc motor without rotor end cover and meet customer requirements; the labyrinth sealing structure plays an IP55 waterproof role and reduces the rotor end cover structural parts. The labyrinth sealing structure is mainly based on the throttling effect and flow contraction effect in fluid dynamics. Through a series of throttling gaps and expansion cavities, the fluid is throttled and expanded step by step, thereby achieving a sealing effect.

[0023] A first annular groove 110 is dug on the outer end face of the stator end cover 11, and a first annular outer baffle 111 and a first annular inner baffle 112 are formed on both sides of the first annular groove 110; a second annular groove 240 is dug on the outer end face of the injection molded body 24, and a second annular outer baffle 241 and a second annular inner baffle 242 are formed on both sides of the second annular groove 240; the top of the first annular outer baffle 111 is embedded in the second annular groove 240, and the top of the second annular inner baffle 242 is embedded in the first annular groove 110, thereby forming a labyrinth sealing structure with a simple structure and easy implementation.

[0024] The rotating shaft 21 extends downward from the middle of the injection molded body 24 and is supported and installed on the bearing 3.

[0025] The rotating shaft 21 is integrally formed with the rotor core 22 and the magnetic steel 23 by injection molding, and the injection molded body 24 is integrally sealed with the rotating shaft 21 , which can simplify the structure and the production process.

[0026] A load connection boss 25 is disposed in the middle of the top of the injection molded body 24. The load connection boss 25 is disposed in the middle of the top of the injection molded body 24. There is no need for the shaft to extend to connect the load, which simplifies the structure, reduces costs, and reduces the overall noise of the motor.

[0027] The stator end cover 11 is made of metal material.

[0028] Advantages of the utility model: 1: Compared with the current disc motor, under the condition of equivalent motor performance, the rotor end cover components are reduced, the assembly process is reduced, the production cost is reduced, and the production efficiency is further improved. 2: The internal heat cycle is reduced, which indirectly increases the area between the heat source and the air, thereby enhancing the heat dissipation performance of the motor; 3: The labyrinth seal structure removes the connection between the rotor end cover and the shaft, and retains the IP55 protection level. 4: The rotor end cover-free structure reduces the rotor end cover components, reduces the resonance between the components, and thus reduces the motor noise.

[0029] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A disc-type motor without a rotor end cover, comprising a stator assembly (1) and a rotor assembly (2), wherein the stator assembly (1) and the rotor assembly (2) are axially magnetically coupled, wherein the stator assembly (1) comprises a stator end cover (11), a stator core (12) and a coil winding (13), and the rotor assembly (2) comprises a rotating shaft (21), a rotor core (22), a magnetic steel (23) and an injection molded body (24), wherein the injection molded body (24) is formed by injection molding the rotor core (22) and the magnetic steel (23) into one piece, a bearing chamber (14) is formed in the middle of the stator end cover (11), a bearing (3) is installed in the bearing chamber (14), and the rotating shaft (21) is supported and installed on the bearing (3), characterized in that: A labyrinth sealing structure is provided on the end surfaces opposite to the periphery of the stator end cover (11) and the injection molded body (24).

2. The disc-type motor without rotor end cover according to claim 1, characterized in that: A first annular groove (110) is dug on the outer end surface of the stator end cover (11), and a first annular outer baffle (111) and a first annular inner baffle (112) are formed on both sides of the first annular groove (110); a second annular groove (240) is dug on the outer end surface of the injection molded body (24), and a second annular outer baffle (241) and a second annular inner baffle (242) are formed on both sides of the second annular groove (240); the top of the first annular outer baffle (111) is embedded in the second annular groove (240), and the top of the second annular inner baffle (242) is embedded in the first annular groove (110), thereby forming a labyrinth seal structure.

3. A disc-type motor without rotor end cover according to claim 1 or 2, characterized in that: The rotating shaft (21) extends downward from the middle of the injection molded body (24) and is supported and installed on the bearing (3).

4. The disc-type motor without rotor end cover according to claim 3 is characterized in that: The rotating shaft (21), the rotor core (22) and the magnetic steel (23) are integrally formed by injection molding, and the injection molded body (24) and the rotating shaft (21) are integrally sealed by plastic.

5. The disc-type motor without rotor end cover according to claim 4, characterized in that: A load connection boss (25) is arranged in the middle of the top end of the injection molded body (24).

6. The disc-type motor without rotor end cover according to claim 5, characterized in that: The stator end cover (11) is made of metal material.

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