Waterproof stator assembly

Abstract

The invention relates to the technical field of motor devices, in particular to a waterproof stator assembly which comprises a stator assembly and further comprises a first shell, a second shell and a base, the stator assembly is arranged in a second cavity in the right end of the first shell and connected with the base through a fastener, a cavity is formed in the right end of the second shell, and the first shell and the second shell are connected through a fastener. According to the waterproof stator assembly, the stator and the rotor are arranged in the second shell and the first shell, it is guaranteed that the stator and the rotor do not affect each other in independent spaces of the second shell and the first shell, mechanical and electrical separation is achieved, the waterproof structure and the diversion trench are arranged on the first shell, the waterproof structure and the diversion trench are arranged on the second shell, and therefore the waterproof effect is achieved. The waterproof structure can prevent water from entering the first housing, the diversion trench can guide the water to the diversion trench along the length direction of the first housing, and the water flow can take away the heat generated when the stator wire group is used, thereby achieving the cooling effect of the stator assembly.

Description

Technical Field

[0001] The invention relates to the technical field of motor devices, and in particular to a waterproof stator assembly. Background Art

[0002] In traditional motors, the stator and rotor are usually arranged in the same space, such as the internal rotor is arranged on the inner side of the stator, and the external rotor is arranged on the outer side of the stator. This approach will cause the following problems:

[0003] 1. When the rotor is damaged, the motor housing needs to be disassembled, and then the stator and rotor are disassembled. The disassembly process will inevitably damage the waterproof protective layer of the stator winding wire, weakening its waterproof effect;

[0004] 2. The rotor and stator are arranged in the same space, and the connection between the rotor shaft and the outer casing is not sealed. It is inevitable that water will enter the inner part of the casing during use, resulting in the stator winding being damaged by water.

[0005] In addition, traditional waterproof stator assemblies usually use simple sealing rings or potting technology, which has limited waterproof performance and is easily affected by environmental factors, such as aging, deformation, etc., resulting in waterproof failure. Especially when working in harsh environments, such as high humidity, high water pressure, etc., traditional waterproof methods are difficult to meet the requirements.

[0006] To this end, we propose a waterproof stator assembly. Summary of the invention

[0007] A technical problem to be solved by this application is that when the rotor is damaged, the motor housing needs to be disassembled, and then the stator and the rotor need to be disassembled. The disassembly process will inevitably damage the waterproof protective layer of the stator winding wire, thereby weakening its waterproof effect. The rotor and stator are arranged in the same space, and the connection between the rotor shaft and the housing is in a non-sealed state. During use, water will inevitably enter the housing, resulting in the stator winding being damaged by water. Traditional waterproof stator assemblies usually use simple sealing rings or potting technology, which has limited waterproof performance and is easily affected by environmental factors, such as aging, deformation, etc., resulting in waterproof failure.

[0008] In order to solve the above technical problems, the embodiment of the present application provides a waterproof stator assembly, including a stator component, a first shell, a second shell, and a base;

[0009] The stator assembly is disposed in the second cavity at the right end of the first housing and connected to the base via a second bolt;

[0010] A cavity is provided at the right end of the second shell, a first cavity is provided at the left end of the first shell, and the first shell and the second shell are detachably connected by fasteners;

[0011] The first cavity and the second cavity are two independent spaces.

[0012] In some embodiments, the stator assembly includes a stator core and a coil winding, wherein the coil winding is disposed on the stator core.

[0013] In some embodiments, the right end of the first shell includes a first plane, a second plane, a third plane, and a second cavity, the first plane is provided with a plurality of first connecting holes, the inner diameter and outer diameter of the first plane are greater than the inner diameter and outer diameter of the second plane, the inner diameter and outer diameter of the second plane are greater than the inner diameter and outer diameter of the third plane, and the first plane, the second plane, and the third plane are arranged in an inverted step shape;

[0014] In some embodiments, a first connecting protrusion and a guide groove perpendicular to the third plane are provided on the third plane, the first connecting protrusion is located on the inner side of the guide groove, the outer diameter of the first connecting protrusion is smaller than the outer diameter of the third plane, and the inner diameter is larger than the inner diameter of the third plane, and the guide groove is provided along the length direction of the first shell;

[0015] The second cavity can accommodate the stator assembly;

[0016] The right end of the first shell also includes a stator positioning column, which is used to determine the position of the stator assembly.

[0017] In some embodiments, the left end of the first housing includes a second connection hole, a first flange, a first connection groove, a first bearing chamber, a shaft positioning chamber, and a first cavity;

[0018] The second connection hole is arranged through the first flange, and the outer diameter of the first flange is the same as the outer diameter of the second plane and is smaller than the outer diameter of the first plane;

[0019] The first connecting groove is arranged on the first shell surface, the outer diameter of the first connecting groove is smaller than the outer diameter of the first flange, and the inner diameter of the first connecting groove is larger than the diameter of the first cavity;

[0020] The first bearing chamber is arranged in the first cavity, and the inner diameter and outer diameter of the first bearing chamber are smaller than the diameter of the first cavity;

[0021] The shaft positioning chamber is arranged in the first bearing chamber, and the shaft positioning chamber is a blind hole.

[0022] In some embodiments, the base includes a fourth plane, a fifth plane, a sixth plane, a fourth connecting hole, and a second connecting groove;

[0023] The fourth plane is provided with a plurality of fourth connecting holes, which are arranged coaxially with the first connecting holes and have the same hole diameter;

[0024] The outer diameter and inner diameter of the fourth plane are larger than those of the fifth plane, and are equal to those of the first plane;

[0025] The outer diameter and inner diameter of the fifth plane are larger than the outer diameter and inner diameter of the sixth plane, and are equal to the outer diameter and inner diameter of the second plane;

[0026] The diameter of the sixth plane is equal to the outer diameter of the third plane. The second connecting groove is arranged on the sixth plane. The outer diameter and inner diameter of the second connecting groove are both smaller than the diameter of the sixth plane. The second connecting groove is arranged corresponding to the position of the first connecting protrusion, and the outer diameter and inner diameter are equal.

[0027] The fourth plane, the fifth plane and the sixth plane are arranged in a stepped manner.

[0028] In some embodiments, the base also includes a wiring hole and a wire outlet hole. The upper end of the wiring hole is arranged on the third plane and is located on the inner side of the second connecting groove. The lower end of the wiring hole is connected to the right end of the wire outlet hole, and the left end of the wire outlet hole extends out of the outside of the base.

[0029] In some embodiments, the left end of the second housing includes a second flange, a third connecting hole, a second connecting protrusion, a second bearing chamber, and a through hole;

[0030] The outer diameter of the second flange is equal to the outer diameter of the first flange;

[0031] A plurality of third connection holes are arranged on the second flange, and the third connection holes are arranged coaxially with the second connection holes and have the same hole diameter;

[0032] The second connecting protrusion is arranged corresponding to the outer position of the first connecting groove, and the diameter and inner diameter are equal;

[0033] The inner and outer diameters of the second connecting protrusion and the first connecting groove are equal to the inner and outer diameters of the second sealing ring;

[0034] The second bearing chamber is located inside the second housing cavity, and the through hole is arranged inside the second bearing chamber and penetrates the second housing;

[0035] An annular groove is arranged on the inner wall of the through hole, and the size of the annular groove is equal to that of the third sealing ring.

[0036] In some embodiments, the second cavity in the first housing, the stator assembly and the base, and the first sealing ring form a sealed space;

[0037] The stator assembly is glued in the second cavity, and the wiring holes and outlet holes in the base are also glued;

[0038] The first sealing ring cooperates with the first connecting protrusion and the second connecting groove to form a waterproof structure;

[0039] A groove is left in the middle of the left end surface of the first sealing ring, corresponding to the middle protrusion on the top surface of the first connecting protrusion;

[0040] The guide groove can guide the water blocked by the first sealing ring to flow in the guide groove along the length direction of the first shell, and take away the heat generated by the heat of the stator assembly.

[0041] In some embodiments, the second sealing ring cooperates with the second shell and the first shell to form a waterproof structure;

[0042] The third sealing ring cooperates with the rotor shaft and the second shell to form a waterproof structure.

[0043] The present invention has at least the following beneficial effects:

[0044] 1. The stator assembly and the rotor assembly are independently detachable. By placing the stator and the rotor in the second housing and the first housing, it is ensured that they do not affect each other in their own independent spaces, thus achieving electromechanical separation. If the rotor is damaged and needs to be repaired, it is only necessary to disassemble the housing where the rotor is located for inspection and repair, which does not affect the use of the stator.

[0045] 2. By setting a waterproof structure and a guide groove in the first shell, the waterproof structure can prevent water from entering the first shell and affecting the use of the stator assembly. The guide groove can guide water to the guide groove along the length direction of the first shell. The flow of water can take away the heat generated when the stator wire group is used, thereby having the effect of cooling the stator assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0047] Figure 2 It is a schematic diagram of the structure of the stator assembly of the present invention;

[0048] Figure 3 This is a schematic diagram of the first shell structure of the present invention;

[0049] Figure 4 This is a schematic structural diagram of the first housing of the present invention from another angle;

[0050] Figure 5 It is a cross-sectional view of the first shell structure of the present invention;

[0051] Figure 6 It is an enlarged schematic diagram of the cross-sectional view A of the first shell structure of the present invention;

[0052] Figure 7 This is a schematic diagram of the base structure of the present invention;

[0053] Figure 8 It is a cross-sectional view of the base structure of the present invention;

[0054] Fig. 9 This is a schematic diagram of the second shell structure of the present invention;

[0055] Fig.10 This is a schematic structural diagram of the second housing of the present invention from another angle;

[0056] Fig.11 It is a schematic diagram of the structure of the rotor assembly of the present invention;

[0057] Fig.12 It is a cross-sectional view of the structure of the present invention;

[0058] Fig.13 It is an enlarged schematic diagram of the cross-sectional view B of the structure of the present invention;

[0059] Fig.14 It is an enlarged schematic diagram of the cross-sectional view of the structure of the present invention at position C;

[0060] Fig.15 It is an enlarged schematic diagram of the structural cross-sectional view D of the present invention.

[0061] In the figure: 1-stator assembly; 2-rotor assembly; 3-first housing; 4-second housing; 5-base; 6-first sealing ring; 7-second sealing ring; 8-third sealing ring; 9-first bolt; 10-second bolt; 101-stator core; 102-coil winding; 201-rotor body; 202-bearing; 203-rotor shaft; 301-first plane; 302-second plane; 303-third plane; 304-first connecting hole; 305-stator positioning column; 306-second connecting hole; 307-first flange; 308-first connecting groove; 309-first bearing chamber; 310-axis positioning chamber; 311-first cavity; 312-second cavity; 313-first connecting protrusion; 314-guide groove; 401-second flange; 402-third connecting hole; 403-second connecting protrusion; 404-second bearing chamber; 405-through hole; 406-annular groove; 501-fourth plane; 502-fifth plane; 503-sixth plane; 504-fourth connecting hole; 505-second connecting groove; 506-wiring hole; 507-wire outlet hole. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] Example 1: Please refer to Figure 1-15 , the present invention provides a technical solution:

[0064] For easier understanding, this embodiment uses the rotor assembly 2 for illustration.

[0065] A waterproof stator assembly includes a stator component 1, a first shell 3, a second shell 4, and a base 5;

[0066] The stator assembly 1 is arranged in the second cavity 312 at the right end of the first shell 3 and is connected to the base 5 by a second bolt 10. A cavity is provided at the right end of the second shell 4, and a first cavity 311 is provided at the left end of the first shell 3. The first shell 3 and the second shell 4 are detachably connected by fasteners, and the first cavity 311 and the second cavity 312 are two independent spaces.

[0067] Furthermore, the stator assembly 1 includes a stator core 101 and a coil winding 102 , and the coil winding 102 is disposed on the stator core 101 .

[0068] Furthermore, the rotor assembly 2 includes a rotor body 201 , a bearing 202 , and a rotor shaft 203 . The bearing 202 is disposed on the rotor shaft 203 , and the rotor shaft 203 is disposed on the rotor body 201 .

[0069] In some embodiments, the right end of the first shell 3 includes a first plane 301, a second plane 302, a third plane 303, and a second cavity 312. The first plane 301 is provided with a plurality of first connecting holes 304. The inner diameter and outer diameter of the first plane 301 are larger than the inner diameter and outer diameter of the second plane 302. The inner diameter and outer diameter of the second plane 302 are larger than the inner diameter and outer diameter of the third plane 303. The first plane 301, the second plane 302, and the third plane 303 are arranged in an inverted step shape.

[0070] A first connecting protrusion 313 and a guide groove 314 perpendicular to the third plane 303 are provided on the third plane 303. The first connecting protrusion 313 is located on the inner side of the guide groove 314. The outer diameter of the first connecting protrusion 313 is smaller than the outer diameter of the third plane 303, and the inner diameter is larger than the inner diameter of the third plane 303. The guide groove 314 is arranged along the length direction of the first shell 3. The second cavity 312 can accommodate the stator assembly 1. The right end of the first shell 3 also includes a stator positioning column 305, which is used to determine the position of the stator assembly 1.

[0071] Furthermore, the left end of the first shell 3 includes a second connecting hole 306, a first flange 307, a first connecting groove 308, a first bearing chamber 309, an axis positioning chamber 310, and a first cavity 311. The second connecting hole 306 is arranged through the first flange 307. The outer diameter of the first flange 307 is the same as the outer diameter of the second plane 302, which is smaller than the outer diameter of the first plane 301. The first connecting groove 308 is arranged on the surface of the first shell 3. The outer diameter of the first connecting groove 308 is smaller than the outer diameter of the first flange 307. The inner diameter of the first connecting groove 308 is larger than the diameter of the first cavity 311. The first bearing chamber 309 is arranged in the first cavity 311. The inner diameter and outer diameter of the first bearing chamber 309 are smaller than the diameter of the first cavity 311. The axis positioning chamber 310 is arranged in the first bearing chamber 309, and the axis positioning chamber 310 is a blind hole.

[0072] In some embodiments, the base 5 includes a fourth plane 501, a fifth plane 502, a sixth plane 503, a fourth connecting hole 504, and a second connecting groove 505. The fourth plane 501 is provided with a plurality of fourth connecting holes 504. The fourth connecting holes 504 are coaxially arranged corresponding to the first connecting holes 304, and the aperture sizes are equal. The outer diameter and inner diameter of the fourth plane 501 are greater than the fifth plane 502, and are equal to the outer diameter and inner diameter of the first plane 301. The outer diameter and inner diameter of the fifth plane 502 are greater than the outer diameter and inner diameter of the sixth plane 503, and are equal to the outer diameter and inner diameter of the second plane 302. The diameter of the sixth plane 503 is equal to the outer diameter of the third plane 303. The second connecting groove 505 is arranged on the sixth plane 503. The outer diameter and inner diameter of the second connecting groove 505 are both smaller than the diameter of the sixth plane 503, and are arranged corresponding to the position of the first connecting protrusion 313, with the outer diameter and inner diameter being equal. The fourth plane 501, the fifth plane 502, and the sixth plane 503 are arranged in a stepped manner.

[0073] Furthermore, the base 5 also includes a wiring hole 506 and a wire outlet hole 507. The upper end of the wiring hole 506 is arranged on the third plane 303 and is located on the inner side of the second connecting groove 505. The lower end of the wiring hole 506 is connected to the right end of the wire outlet hole 507, and the left end of the wire outlet hole 507 extends out of the outside of the base 5.

[0074] Furthermore, the left end of the second shell 4 includes a second flange 401, a third connecting hole 402, a second connecting protrusion 403, a second bearing chamber 404, and a through hole 405. The outer diameter of the second flange 401 is equal to the outer diameter of the first flange 307. A plurality of third connecting holes 402 are arranged on the second flange 401. The third connecting holes 402 and the second connecting holes 306 are coaxially arranged and have the same aperture size. The second connecting protrusion 403 is arranged corresponding to the outer position of the first connecting groove 308, and the outer diameter and inner diameter are equal. The inner diameter and outer diameter of the second connecting protrusion 403 and the first connecting groove 308 are equal to the inner diameter and outer diameter of the second sealing ring 7. The second bearing chamber 404 is located inside the cavity of the second shell 4. The through hole 405 is arranged inside the second bearing chamber 404 and passes through the second shell 4. The inner wall of the through hole 405 is provided with an annular groove 406, and the size of the annular groove 406 is equal to that of the third sealing ring 8.

[0075] Furthermore, the second cavity 312 in the first shell 3, the stator assembly 1 and the base 5, and the first sealing ring 6 form a sealed space. The stator assembly 1 is glue-filled in the second cavity 312, and the wiring hole 506 and the outlet hole 507 in the base 5 are also glue-filled. The first sealing ring 6 cooperates with the first connecting protrusion 313 and the second connecting groove 505 to form a waterproof structure. A groove is left in the middle of the left end face of the first sealing ring 6, corresponding to the middle protrusion on the top face of the first connecting protrusion 313. The guide groove 314 can guide the water blocked by the first sealing ring 6 to the guide groove 314 to flow along the length direction of the first shell 3, thereby taking away the heat generated by the heat of the stator assembly 1.

[0076] Furthermore, the surface of the rotor assembly 2 is painted with waterproof paint, the rotor shaft 203 at the left end of the rotor assembly 2 extends into the cavity of the second housing 4, passes through the through hole 405, the left end bearing 202 extends into the second bearing chamber 404, the right end rotor shaft 203 extends into the first cavity 311 at the left end of the first housing 3, the rotor shaft 203 extends into the shaft positioning chamber 310, the right end bearing 202 extends into the first bearing chamber 309, the left end of the rotor body 201 extends into the cavity of the second housing 4, the right end of the rotor body 201 extends into the first cavity 311 at the left end of the first housing 3, and the detachable connection is completed by the first bolt 9, the second sealing ring 7 cooperates with the rotor assembly 2 and the first housing 3 to form a waterproof structure. The third sealing ring 8 cooperates with the rotor shaft 203 and the second housing 4 to form a waterproof structure.

[0077] The following describes the assembly process of the entire device:

[0078] First, the stator assembly 1 is connected to the base 5, and the first sealing ring 6 is connected to the first shell 3 through the second bolt 10 through the first connecting hole 304 of the first shell 3 and the fourth connecting hole 504 of the base 5. Specifically, the stator assembly 1 is positioned by the stator positioning column 305 and extends into the second cavity 312 at the right end of the first shell 3. The first plane 301 at the right end of the first shell 3 is in one-to-one contact with the fourth plane 501 of the base 5, the second plane 302 is in one-to-one contact with the fifth plane 502 of the base 5, and the third plane 303 is in one-to-one contact with the sixth plane 503 of the base 5. The lead wires of the coil winding 102 in the stator assembly 1 are led out through the wiring hole 506 and the outlet hole 507 of the base 5. The first sealing ring 6 cooperates with the first connecting protrusion 313 and the second connecting groove 505 to form a waterproof structure. A groove is left in the middle of the left end surface of the first sealing ring 6, corresponding to the middle protrusion on the top surface of the first connecting protrusion 313. Since the first connecting hole 304 of the first shell 3 and the fourth connecting hole 504 of the base 5 are coaxially arranged and have equal hole diameters, the second bolt 10 of the fastener passes through the first connecting hole 304 of the first shell 3 and the fourth connecting hole 504 of the base 5 to connect the right end of the first shell 3 with the stator assembly 1 and the base 5.

[0079] The stator assembly 1 is filled with glue in the second cavity 312, and the wiring hole 506 and the outlet hole 507 in the base 5 are also filled with glue. The first sealing ring 6 cooperates with the first connecting protrusion 313 and the second connecting groove 505 to form a waterproof structure as the first waterproof layer. The stator assembly 1 itself is filled with glue as the second waterproof layer. The guide groove 314 guides the water blocked by the first sealing ring 6 to the guide groove 314 to flow along the length direction of the first shell 3, taking away the heat generated by the stator assembly 1.

[0080] Then, the rotor shaft 203 at the left end of the rotor assembly 2 is extended into the cavity of the second shell 4 and passes through the through hole 405, the left end bearing 202 is extended into the second bearing chamber 404, the right end rotor shaft 203 is extended into the first cavity 311 at the left end of the first shell 3, the rotor shaft 203 is extended into the shaft positioning chamber 310, the right end bearing 202 is extended into the first bearing chamber 309, the left end of the rotor body 201 is extended into the cavity of the second shell 4, and the right end of the rotor body 201 is extended into the first cavity 311 at the left end of the first shell 3. Since the third connecting hole 402 in the second shell 4 is coaxially arranged with the second connecting hole 306 of the first shell 3 and has the same aperture size, the detachable connection is completed by passing the third connecting hole 402 in the second shell 4 and the second connecting hole 306 of the first shell 3 through four fasteners, the first bolts 9 are used to pass through the third connecting hole 402 in the second shell 4 and the second connecting hole 306 of the first shell 3.

[0081] Among them, the second sealing ring 7 is arranged between the second connecting protrusion 403 of the second shell 4 and the first connecting groove 308 of the first shell 3, and cooperates with the second connecting protrusion 403 of the second shell 4 and the first connecting groove 308 of the first shell 3 to form a waterproof structure of the first shell 3 and the second shell 4. The third sealing ring 8 is arranged between the rotor shaft 203 and the inner wall annular groove 406 of the through hole 405 of the second shell 4, and forms a waterproof structure of the rotor shaft 203 with the inner wall annular groove 406 of the through hole 405 of the second shell 4.

[0082] At this point, the stator assembly 1 , the rotor assembly 2 , the first housing 3 , the second housing 4 , and the base 5 are assembled.

[0083] If the rotor assembly 2 is damaged and needs to be repaired, it is only necessary to unscrew the first bolt 9 of the fastener between the first shell 3 and the second shell 4, disassemble the first shell 3 and the second shell 4, remove the second sealing ring 7 between the second connecting protrusion 403 of the second shell 4 and the first connecting groove 308 of the first shell 3, and then take out the rotor assembly 2. During the whole process of disassembling and removing the rotor, the use of the stator assembly 1 is not affected, thereby realizing "electromechanical separation".

[0084] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A waterproof stator assembly, comprising a stator component (1), characterized in that: It also includes a first shell (3), a second shell (4), and a base (5); The stator assembly (1) is arranged in a second cavity (312) at the right end of the first housing (3), and is connected to the base (5) via a fastener; The second shell (4) is provided with a cavity at the right end, and the first shell (3) is provided with a first cavity (311) at the left end, and the first shell (3) and the second shell (4) are detachably connected by fasteners; The first cavity (311) and the second cavity (312) are two independent spaces.

2. The waterproof stator assembly according to claim 1, characterized in that: The stator assembly (1) comprises a stator core (101) and a coil winding (102), wherein the coil winding (102) is wound on the stator core (101).

3. The waterproof stator assembly according to claim 1, characterized in that: The right end of the first shell (3) comprises a first plane (301), a second plane (302), a third plane (303), and a second cavity (312); the first plane (301) is provided with a plurality of first connecting holes (304); the inner diameter and outer diameter of the first plane (301) are larger than the inner diameter and outer diameter of the second plane (302); the inner diameter and outer diameter of the second plane (302) are larger than the inner diameter and outer diameter of the third plane (303); and the first plane (301), the second plane (302), and the third plane (303) are arranged in an inverted step shape.

4. The waterproof stator assembly according to claim 3, characterized in that: The third plane (303) is provided with a first connecting protrusion (313) and a guide groove (314) perpendicular to the third plane (303); the first connecting protrusion (313) is located on the inner side of the guide groove (314); the outer diameter of the first connecting protrusion (313) is smaller than the outer diameter of the third plane (303), and the inner diameter is larger than the inner diameter of the third plane (303); the guide groove (314) is provided along the length direction of the first shell (3); The second cavity (312) can accommodate the stator assembly (1); The right end of the first housing (3) further comprises a stator positioning column (305), and the stator positioning column (305) is used to determine the position of the stator assembly (1).

5. The waterproof stator assembly according to claim 4, characterized in that: The left end of the first shell (3) comprises a second connecting hole (306), a first flange (307), a first connecting groove (308), a first bearing chamber (309), a shaft positioning chamber (310), and a first cavity (311); The second connection hole (306) is disposed through the first flange (307); the outer diameter of the first flange (307) is the same as the outer diameter of the second plane (302) and is smaller than the outer diameter of the first plane (301); The first connecting groove (308) is arranged on the surface of the first shell (3), the outer diameter of the first connecting groove (308) is smaller than the outer diameter of the first flange (307), and the inner diameter of the first connecting groove (308) is larger than the diameter of the first cavity (311); The first bearing chamber (309) is disposed in the first cavity (311), and the inner diameter and the outer diameter of the first bearing chamber (309) are smaller than the diameter of the first cavity (311); The shaft positioning chamber (310) is arranged in the first bearing chamber (309), and the shaft positioning chamber (310) is a blind hole.

6. The waterproof stator assembly according to claim 4, characterized in that: The base (5) comprises a fourth plane (501), a fifth plane (502), a sixth plane (503), a fourth connection hole (504), and a second connection groove (505); The fourth plane (501) is provided with a plurality of fourth connection holes (504), the fourth connection holes (504) and the first connection holes (304) are coaxially arranged correspondingly, and have the same hole diameter; The outer diameter and inner diameter of the fourth plane (501) are greater than those of the fifth plane (502), and are equal to the outer diameter and inner diameter of the first plane (301); The outer diameter and inner diameter of the fifth plane (502) are greater than the outer diameter and inner diameter of the sixth plane (503), and are equal to the outer diameter and inner diameter of the second plane (302); The diameter of the sixth plane (503) is equal to the outer diameter of the third plane (303); the second connecting groove (505) is arranged on the sixth plane (503); the outer diameter and inner diameter of the second connecting groove (505) are both smaller than the diameter of the sixth plane (503); and the second connecting groove (505) is arranged corresponding to the position of the first connecting protrusion (313), and the outer diameter and inner diameter are equal; The fourth plane (501), the fifth plane (502) and the sixth plane (503) are arranged in a stepped manner.

7. The waterproof stator assembly according to claim 6, characterized in that: The base (5) further comprises a wiring hole (506) and a wire outlet hole (507); the upper end of the wiring hole (506) is arranged on the third plane (303) and is located inside the second connection groove (505); the lower end of the wiring hole (506) is connected to the right end of the wire outlet hole (507); and the left end of the wire outlet hole (507) extends out of the outside of the base (5).

8. The waterproof stator assembly according to claim 1, characterized in that: The left end of the second shell (4) comprises a second flange (401), a third connecting hole (402), a second connecting protrusion (403), a second bearing chamber (404), and a through hole (405); The outer diameter of the second flange (401) is equal to the outer diameter of the first flange (307); The second flange (401) is provided with a plurality of third connection holes (402), the third connection holes (402) and the second connection holes (306) are coaxially arranged correspondingly, and have the same hole diameter; The second connecting protrusion (403) is arranged at a corresponding position outside the first connecting groove (308), and the diameter and inner diameter are equal; The inner and outer diameters of the second connecting protrusion (403) and the first connecting groove (308) are equal to the inner and outer diameters of the second sealing ring (7); The second bearing chamber (404) is located inside the cavity of the second shell (4), and the through hole (405) is arranged inside the second bearing chamber (404) and penetrates the second shell (4); The inner wall of the through hole (405) is provided with an annular groove (406), and the size of the annular groove (406) is equal to that of the third sealing ring (8).

9. The waterproof stator assembly according to claim 1, characterized in that: The second cavity (312) in the first shell (3), the stator assembly (1) and the base (5), and the first sealing ring (6) form a sealed space; The stator assembly (1) is filled with glue in the second cavity (312), and the wiring hole (506) and the outlet hole (507) in the base (5) are also filled with glue; The first sealing ring (6) cooperates with the first connecting protrusion (313) and the second connecting groove (505) to form a waterproof structure; A groove is left in the middle of the left end surface of the first sealing ring (6), corresponding to the middle protrusion on the top surface of the first connecting protrusion (313); The guide groove (314) guides the water blocked by the first sealing ring (6) to the guide groove (314) to flow along the length direction of the first shell (3), thereby taking away the heat generated by the stator assembly (1).

10. The waterproof stator assembly according to claim 8, characterized in that: The second sealing ring (7) cooperates with the second shell (4) and the first shell (3) to form a waterproof structure; The third sealing ring (8) cooperates with the rotor shaft (203) and the second shell (4) to form a waterproof structure.

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