Plastic-packaged stator and external rotor motor comprising the same

1. A plastic-packaged stator, comprising:

a sleeve base;

a plurality of tooth assemblies, and

a plastic-packaged body:

wherein:

each tooth assembly comprises an iron core comprising a plurality of laminated silicon steel sheets, a terminal insulator, and coil windings;

the terminal insulator is disposed on one end of the iron core; the coil windings are coiled on the terminal insulator;

a plurality of lug bosses is circumferentially disposed at intervals on an outer wall surface of the sleeve base;

an inner end of the iron core comprises slots;

the tooth assemblies are circumferentially disposed on the outer wall surface of the sleeve base;

the lug bosses are embedded in the slots;

the plastic-packaged body integrates the sleeve base with the tooth assemblies;

a bump is disposed between two adjacent lug bosses on the outer wall surface of the sleeve base; and

an axial extension length of the bump is smaller than axial extension lengths of the lug bosses, and an open slot is formed between the bump and a lug boss beside the bump.

2. The stator of claim 1 , wherein one side of the inner end of the iron core is provided with a bulge, and the other side is provided with a notch; and the bulge of one iron core is embedded in the notch of an adjacent iron core.

3. The stator of claim 2 , wherein a hall plate assembly is disposed on the tooth assemblies; a socket is disposed on the hall plate assembly; the plastic-packaged body is sleeved on the hall plate assembly, and the socket protrudes from the plastic-packaged body.

4. The stator of claim 1 , wherein a hall plate assembly is disposed on the tooth assemblies; a socket is disposed on the hall plate assembly; the plastic-packaged body is sleeved on the hall plate assembly, and the socket protrudes from the plastic-packaged body.

5. The stator of claim 3 , wherein the socket comprises a three-position plug socket and a five-position plug socket; and the three-position plug socket is adapted to introduce three-phase line of the tooth assemblies, and the five-position plug socket is adapted to connect the hall plate assembly.

6. The stator of claim 4 , wherein the socket comprises a three-position plug socket and a five-position plug socket; and the three-position plug socket is adapted to introduce three-phase line of the tooth assemblies, and the five-position plug socket is adapted to connect the hall plate assembly.

7. The stator of claim 2 , wherein a plurality of supporting arms protrudes out of the sleeve base; mounting holes are disposed on external ends of the supporting arms; the plastic-packaged body is sleeved on the supporting arms, with the mounting holes exposed.

8. The stator of claim 1 , wherein a plurality of supporting arms protrudes out of the sleeve base; mounting holes are disposed on external ends of the supporting arms; the plastic-packaged body is sleeved on the supporting arms, with the mounting holes exposed.

9. An external rotor motor, comprising:

a rotary shaft;

a plastic-packaged stator, the plastic-packaged stator comprising a sleeve base comprising bearing housings, a plurality of tooth assemblies, and a plastic-packaged body; and

an external rotor, the external rotor comprising a shell sleeve and a plurality of permanent magnets;

wherein

the bearing housings are disposed on two ends of the sleeve base; each bearing housing comprises a bearing; the rotary shaft is disposed in the sleeve base, and each end of the rotary shaft is supported by the bearing; the external rotor is sleeved on the plastic-packaged stator;

the permanent magnets are mounted on an inner wall surface of the shell sleeve; one end of the rotary shaft protrudes out from the sleeve base and is connected to the shell sleeve; and

each tooth assembly comprises an iron core comprising a plurality of laminated silicon steel sheets, a terminal insulator, and coil windings; the terminal insulator is disposed on one end of the iron core; the coil windings are coiled on the terminal insulator; a plurality of lug bosses is circumferentially disposed at intervals on an outer wall surface of the sleeve base; an inner end of the iron core comprises slots; the tooth assemblies are circumferentially disposed on the outer wall surface of the sleeve base; the lug bosses are embedded in the slots; the plastic-packaged body integrates the sleeve base with the tooth assemblies; a bump is disposed between two adjacent lug bosses on the outer wall surface of the sleeve base; and an axial extension length of the bump is smaller than axial extension lengths of the lug bosses, and an open slot is formed between the bump and a lug boss beside the bump.

10. The motor of claim 9 , wherein a controller is mounted on the plastic-packaged body.

11. The motor of claim 10 , wherein a plurality of supporting arms protrudes out of the sleeve base; mounting holes are disposed on external ends of the supporting arms; the plastic-packaged body is sleeved on the supporting arms, with the mounting holes exposed; and the controller is screwed on the mounting holes via screws.