External rotor motor

Abstract

The utility model discloses an external rotor motor, which comprises a rotating shaft, a stator assembly, an external rotor and a sleeve seat, the stator assembly comprises a stator iron core, an end insulator and a coil winding, the stator iron core comprises a yoke part and a plurality of tooth parts, the plurality of tooth parts are circumferentially arranged on the outer surface of the yoke part, two adjacent tooth parts form a wire embedding slot, the stator assembly further comprises slot wedges, and the slot wedges are arranged on the outer surface of the yoke part. The slot wedge is installed at a slot opening of the wire embedding slot and comprises a side plate, the bottom of the side plate is provided with a limiting installation boss, the outer side face of the side plate is provided with a slot opening installation positioning rib, the outer side face of the slot opening installation positioning rib, the left side and the right side of the side plate and the top are inclined faces, and the inner side face of the side plate is an arc face. The notch installation positioning rib of the slot wedge is clamped in the notch of the wire embedding groove, the inner side face of the side plate abuts against the coil winding, the creepage distance between the coil winding and the notch of the stator iron core is increased through the slot wedge, the enough creepage distance is ensured, the problems of poor voltage resistance and burn-in of the motor are effectively prevented, and the quality of the motor product is improved.

Description

Technical Field

[0001] The utility model relates to an outer rotor motor. Background Art

[0002] The existing plastic-encapsulated stator includes a plastic-encapsulated layer and a stator assembly located inside the plastic-encapsulated layer, wherein the stator assembly includes a stator core, an end insulation mounted on the stator core, and a coil winding wound on the end insulation, wherein the stator core includes a yoke and a plurality of teeth protruding from the inner side of the yoke, and a wire embedding groove is formed between two adjacent teeth, and the coil winding is wound on the wire embedding groove. When the stator assembly is injection-molded, the creepage distance between the notch of the wire embedding groove, the coil winding, and the stator core is insufficient, which may cause safety hazards. Summary of the invention

[0003] The utility model aims to provide an outer rotor motor to solve the technical problem of insufficient creepage distance between coil windings and stator core at slots in the prior art.

[0004] The technical solution of the utility model is achieved in this way:

[0005] The utility model provides an outer rotor motor, comprising a rotating shaft, a stator assembly, an outer rotor and a sleeve seat, wherein the stator assembly comprises a stator core, an end insulation and a coil winding, wherein the stator core comprises a yoke and a plurality of teeth, wherein the plurality of teeth are circumferentially arranged on the outer surface of the yoke, wherein two adjacent teeth form a wire embedding groove, wherein the end insulation covers the surface of the stator core, wherein the coil winding is wound on the stator core and the end insulation is used to separate the coil winding from the stator core, wherein a plurality of wiring terminals are installed on the end insulation, wherein the wiring terminals are electrically connected to the coil winding, and wherein the utility model is characterized in that:

[0006] The stator assembly also includes a slot wedge, which is installed at the slot of the wire embedding slot. The slot wedge includes a side plate, a limit mounting boss is provided at the bottom of the side plate, a slot mounting positioning rib is provided on the outer side of the side plate, the top of the slot mounting positioning rib is an inclined surface, and the inner side surface of the side plate is an arc surface. The slot mounting positioning rib of the slot wedge is clamped in the slot of the wire embedding slot, and the inner side surface of the side plate is against the coil winding.

[0007] The end insulation mentioned above includes an upper end insulation covering the top surface of the stator core, a lower end insulation covering the bottom surface of the stator core and a slot insulator located in the wire embedding slot, and a plurality of terminal mounting bosses for mounting wiring terminals are provided on the lower end insulation.

[0008] The above-mentioned terminal block includes a connecting plate body, a pin portion protruding from the middle position of the top surface of the connecting plate body, and a mounting foot portion protruding from the bottom surface of the connecting plate body. A hanging portion for hanging wires is also provided in the middle position or side of the bottom surface of the connecting plate body, and a slot corresponding to the mounting foot is provided on the terminal mounting boss.

[0009] The upper end insulation, lower end insulation, slot insulator and terminal mounting boss are integrally injection molded.

[0010] The sleeve seat includes a bottom plate and a sleeve protruding upward from the middle of the top surface of the bottom plate, the stator assembly is sleeved outside the sleeve, and the outer rotor is sleeved outside the stator assembly;

[0011] A sleeve shell extends downward from the outer edge of the bottom surface of the base plate, a dust cover is installed at the opening of the sleeve shell, a cavity is formed between the base plate, the sleeve shell and the dust cover, a circuit board is installed in the cavity, a plurality of terminal holes are provided on the base plate, and the ends of the wiring terminals extend from the terminal holes of the base plate into the cavity to be electrically connected to the circuit board.

[0012] The sleeve shell described above is provided with a plurality of slots, and the dust cover is provided with a plurality of buckles. When the dust cover is installed on the sleeve shell, the buckles are mounted in the slots.

[0013] The sleeve shell described above is provided with a notch, a lead wire clamp is installed on the notch, and the lead wire clamp is located between the sleeve shell and the dust cover.

[0014] The lead clamp described above includes a wire clamp body, a plurality of wire grooves are provided on the bottom surface of the wire clamp body, positioning grooves are provided on the left and right sides of the wire clamp body for clamping on both sides of the notch, and the wire clamp body is also provided with a mounting hole for fixing on the bottom plate.

[0015] The lead clip described above is made of rubber material.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. An outer rotor motor, comprising a rotating shaft, a stator assembly, an outer rotor and a sleeve seat, wherein the stator assembly comprises a stator core, an end insulation and a coil winding, wherein the stator core comprises a yoke and a plurality of teeth, wherein the plurality of teeth are circumferentially arranged on the outer surface of the yoke, wherein two adjacent teeth form a wire embedding groove, wherein the end insulation covers the surface of the stator core, wherein the coil winding is wound on the stator core and the end insulation is used to separate the coil winding from the stator core, wherein a plurality of connection terminals are mounted on the end insulation, wherein the connection terminals are electrically connected to the coil winding, wherein the stator assembly further comprises a slot wedge The slot wedge is installed at the slot of the wire embedding slot. The slot wedge includes a side plate. A limit mounting boss is provided at the bottom of the side plate. A slot mounting positioning rib is provided on the outer side of the side plate. The outer side of the slot mounting positioning rib, the left and right sides of the side plate and the top are inclined surfaces. The inner side of the side plate is an arc surface. The slot mounting positioning rib of the slot wedge is clamped in the slot of the wire embedding slot. The inner side of the side plate is against the coil winding. The creepage distance of the coil winding and the slot of the stator core is increased by the slot wedge, ensuring sufficient creepage distance, effectively preventing poor voltage resistance and burn-in problems of the motor, and improving the quality of motor products.

[0018] 2. Other advantages of the utility model are described in detail in the embodiment section of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A stereogram provided for the utility model;

[0020] Figure 2 A partial exploded view provided for the utility model;

[0021] Figure 3 A schematic diagram of the structure of a stator assembly provided by the utility model;

[0022] Figure 4 A partial structural exploded view of the stator assembly provided by the utility model;

[0023] Figure 5 A schematic diagram of the end insulation structure provided by the utility model;

[0024] Figure 6 A schematic diagram of the stator core structure provided by the utility model;

[0025] Figure 7 A schematic diagram of a local structure provided by the utility model;

[0026] Figure 8 A schematic diagram of the sleeve seat structure provided by the utility model;

[0027] Fig. 9 A schematic diagram of the lead clip structure provided by the utility model;

[0028] Fig.10 A front view provided for the utility model;

[0029] Fig.11 for Fig.10 Sectional view of AA in the middle;

[0030] Fig.12 A three-dimensional diagram of the slot wedge provided by the utility model. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1:

[0033] like Figures 1 to 12 As shown, this embodiment provides an outer rotor motor, including a rotating shaft 1, a stator assembly 2, an outer rotor 3 and a sleeve seat 4, the stator assembly 2 includes a stator core 21, an end insulation 22 and a coil winding 23, the stator core 21 includes a yoke 211 and a plurality of teeth 212, the plurality of teeth 212 are circumferentially arranged on the outer surface of the yoke 211, two adjacent teeth 212 form a wire embedding groove 213, the end insulation 22 covers the surface of the stator core 21, the coil winding 23 is wound on the stator core 21 and the end insulation 22 is used to separate the coil winding 23 and the stator core 21, a plurality of wiring terminals 25 are installed on the end insulation 22, and the wiring terminals 25 are electrically connected to the coil winding 23, characterized in that:

[0034] The stator assembly 2 also includes a slot wedge 24, which is installed at the slot 214 of the wire embedding slot 213. The slot wedge 24 includes a side plate 241. The bottom of the side plate 241 is provided with a limit mounting boss 242. The outer side surface of the side plate 241 is provided with a slot mounting positioning rib 243. The top of the slot mounting positioning rib 243 is an inclined surface 240, and the inner side surface of the side plate 241 is an arc surface 241a. The slot mounting positioning rib 243 of the slot wedge 24 is clamped in the slot 214 of the wire embedding slot 213. The inner side surface of the side plate 241 is against the coil winding 23. The creepage distance between the coil winding and the slot of the stator core is increased by the slot wedge, ensuring sufficient creepage distance, effectively preventing poor motor withstand voltage and burn-in problems, and improving the quality of motor products.

[0035] The above-mentioned end insulation 22 includes an upper end insulation 221 covering the top surface of the stator core 21, a lower end insulation 222 covering the bottom surface of the stator core 21 and a slot insulator 223 located in the wire embedding slot 213. The lower end insulation 222 is provided with a plurality of terminal mounting bosses 2221 for mounting the wiring terminals 25. It has a simple structure, does not require installation, reduces the process, reduces labor costs, and improves production efficiency.

[0036] The above-mentioned terminal block 25 includes a connecting plate body 251, a pin portion 252 protruding from the middle position of the top surface of the connecting plate body 251, and a mounting foot 253 protruding from the bottom surface of the connecting plate body 251. A hanging portion 254 for hanging a wire is also provided in the middle position or side of the bottom surface of the connecting plate body 251. A slot 2222 corresponding to the mounting foot 253 is provided on the terminal mounting boss 2221, and the structural arrangement is reasonable.

[0037] The upper end insulator 221, the lower end insulator 222, the groove insulator 223 and the terminal mounting boss 2221 are integrally injection molded, which has a simple structure, is easy to manufacture, and reduces the number of molds.

[0038] The above-mentioned sleeve seat 4 includes a base plate 41 and a sleeve 42 protruding upward from the middle of the top surface of the base plate 41. The stator assembly 2 is sleeved outside the sleeve 42, and the outer rotor 3 is sleeved outside the stator assembly 2; a sleeve shell 43 extends downward from the outer edge of the bottom surface of the base plate 41, and a dust cover 44 is installed at the opening of the sleeve shell 43. A cavity 45 is formed between the base plate 41, the sleeve shell 43 and the dust cover 44, and a circuit board 46 is installed in the cavity 45. A plurality of terminal holes 411 are provided on the base plate 41, and the ends of the terminal blocks 25 extend from the terminal holes 411 of the base plate 41 into the cavity 45 to be electrically connected to the circuit board 46, thereby reducing the number of molds and arranging the structure reasonably.

[0039] The sleeve housing 43 is provided with a plurality of slots 431 , and the dust cover 44 is provided with a plurality of buckles 441 . When the dust cover 44 is mounted on the sleeve housing 43 , the buckles 441 are mounted in the slots 431 , and the mounting structure is simple.

[0040] The sleeve housing 43 is provided with a notch 432 , on which a lead clip 433 is mounted. The lead clip 433 is located between the sleeve housing 43 and the dust cover 44 , and has a reasonable structural arrangement, which is convenient for leading out the lead wires.

[0041] The above-mentioned lead clamp 433 includes a wire clamp body 4331, and a plurality of wire grooves 4332 are provided on the bottom surface of the wire clamp body 4331. Positioning grooves 4333 that are clamped on both sides of the notch 432 are provided on the left and right sides of the wire clamp body 4331. The wire clamp body 4331 is also provided with mounting holes 4334 for fixing on the base plate 41. The mounting structure is simple and the positioning is good.

[0042] The lead clip 433 is made of rubber material.

[0043] 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. An outer rotor motor, comprising a rotating shaft (1), a stator assembly (2), an outer rotor (3) and a sleeve seat (4), wherein the stator assembly (2) comprises a stator core (21), an end insulation (22) and a coil winding (23), wherein the stator core (21) comprises a yoke (211) and a plurality of teeth (212), wherein the plurality of teeth (212) are circumferentially arranged on the outer surface of the yoke (211), and two adjacent teeth (212) form a wire embedding groove (213), wherein the end insulation (22) covers the surface of the stator core (21), wherein the coil winding (23) is wound on the stator core (21) and the end insulation (22) is used to separate the coil winding (23) from the stator core (21), wherein the end insulation (22) is provided with a plurality of connection terminals (25), wherein the connection terminals (25) are electrically connected to the coil winding (23), and wherein: The stator assembly (2) further comprises a slot wedge (24), the slot wedge (24) being mounted at the slot opening (214) of the wire embedding slot (213), the slot wedge (24) comprising a side plate (241), a limiting mounting boss (242) being provided at the bottom of the side plate (241), a slot opening mounting positioning rib (243) being provided at the outer side surface of the side plate (241), the top of the slot opening mounting positioning rib (243) being an inclined surface (240), the inner side surface of the side plate (241) being an arc surface (241a), the slot opening mounting positioning rib (243) of the slot wedge (24) being clamped in the slot opening (214) of the wire embedding slot (213), and the inner side surface of the side plate (241) being against the coil winding (23).

2. An outer rotor motor according to claim 1, characterized in that: The end insulation (22) comprises an upper end insulation (221) covering the top surface of the stator core (21), a lower end insulation (222) covering the bottom surface of the stator core (21), and a slot insulator (223) located in the wire embedding slot (213), and a plurality of terminal mounting bosses (2221) for mounting connection terminals (25) are provided on the lower end insulation (222).

3. An outer rotor motor according to claim 2, characterized in that: The wiring terminal (25) comprises a connecting plate body (251), a pin portion (252) protruding from the middle position of the top surface of the connecting plate body (251), and a mounting foot portion (253) protruding from the bottom surface of the connecting plate body (251); a wire hanging portion (254) for hanging wires is also provided in the middle position or on the side of the bottom surface of the connecting plate body (251); and a slot (2222) corresponding to the mounting foot portion (253) is provided on the terminal mounting boss (2221).

4. An outer rotor motor according to claim 3, characterized in that: The upper end insulation (221), the lower end insulation (222), the groove insulator (223) and the terminal mounting boss (2221) are integrally injection molded.

5. An outer rotor motor according to claim 1 or 2 or 3 or 4, characterized in that: The sleeve seat (4) comprises a bottom plate (41) and a sleeve (42) protruding upward from the middle of the top surface of the bottom plate (41); the stator assembly (2) is sleeved outside the sleeve (42); and the outer rotor (3) is sleeved outside the stator assembly (2); A sleeve shell (43) extends downward from the outer edge of the bottom surface of the base plate (41); a dust cover (44) is installed at the opening of the sleeve shell (43); a cavity (45) is formed between the base plate (41), the sleeve shell (43) and the dust cover (44); a circuit board (46) is installed in the cavity (45); a plurality of terminal holes (411) are provided on the base plate (41); ends of the connection terminals (25) extend from the terminal holes (411) of the base plate (41) into the cavity (45) to be electrically connected to the circuit board (46).

6. An outer rotor motor according to claim 5, characterized in that: The sleeve shell (43) is provided with a plurality of slots (431), and the dust cover (44) is provided with a plurality of buckles (441). When the dust cover (44) is installed on the sleeve shell (43), the buckles (441) are buckled in the slots (431).

7. An outer rotor motor according to claim 6, characterized in that: A notch (432) is provided on the sleeve shell (43), a lead wire clamp (433) is installed on the notch (432), and the lead wire clamp (433) is located between the sleeve shell (43) and the dust cover (44).

8. An outer rotor motor according to claim 7, characterized in that: The lead clamp (433) comprises a wire clamp body (4331), the bottom surface of which is provided with a plurality of wire passing grooves (4332), the left and right sides of the wire clamp body (4331) are provided with positioning grooves (4333) which are clamped on both sides of the notch (432), and the wire clamp body (4331) is also provided with mounting holes (4334) for fixing to the bottom plate (41).

9. An outer rotor motor according to claim 8, characterized in that: The lead clip (433) is made of rubber material.

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