Stator core and stator assembly and motor using same

Abstract

The stator core comprises a plurality of unit cores, each unit core comprises a yoke part and a tooth part extending outwards from the outer side edge of the yoke part, and a wire embedding groove is formed between every two adjacent tooth parts, and is characterized in that one side of each yoke part is provided with a convex block, the other side of each yoke part is provided with a clamping groove, and the convex block is clamped in the clamping groove. When the unit iron cores are spliced into the annular iron core part, the protruding block of one of every two adjacent unit iron cores is clamped into the clamping groove of the other unit iron core, meanwhile, the positioning bosses are clamped into the positioning grooves, the yoke parts of the multiple unit iron cores are combined into an annular body, and the yoke parts of the multiple unit iron cores are combined into the annular body. Through the locking structure of the stator iron core, the whole assembly can be effectively locked, and it is ensured that the iron core assembly can be kept in a circular state for next process production.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of stator core and the stator assembly and motor of application thereof. BACKGROUND

[0002] Market motor cost competition is increasingly intense, various motor manufacturers from different angles, adopt multiple schemes to reduce the cost of motor. Among them, the scheme of block core is high in material utilization, has good effect of reducing cost and increasing efficiency, so many manufacturers are using. In the prior art CN115765231A patent, the block core is connected by injection molding material, there are still defects such as plastic in the shoe part, the thickness tolerance and process factors affect the roundness, and the phase lines of the stator winding are not well separated.

[0003] The single block core is connected into a whole by injection molding material, and the whole is wound. After winding, the whole is rolled into a circle, and the whole is kept in a circular shape by welding or injection molding material. There are still problems or defects: 1. Due to the connection of the two core blocks by the plastic in the shoe part, the thickness tolerance and process factors affect the roundness of the rolled circle; 2. The connecting lines between the phases of the stator winding are not layered, or even if they are layered, adhesive tape is needed to fix them to prevent the lines from coming off after rolling, and the assembly process is complex. SUMMARY

[0004] The utility model aims to provide a kind of stator core, solve the technical problem that the roundness of the rolled circle is affected due to the connection of the two core blocks by the plastic in the shoe part in the prior art.

[0005] Another object of the utility model is to provide a kind of stator assembly, to solve the technical problem that the connecting lines between the phases of the coil winding of the stator assembly in the prior art are not layered, or even if they are layered, adhesive tape is needed to fix them to prevent the lines from coming off after rolling, and the assembly process is complex.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model provides a kind of stator core, including a plurality of unit cores, the unit core includes yoke part and the tooth part that extends out from the outer side edge of yoke part, the embedded wire slot is formed between the two adjacent tooth parts, characterized in that: one side of yoke part is provided with protruding block, the other side of yoke part is provided with clamping groove, the protruding block is provided with positioning groove, the clamping groove is provided with positioning boss matched with the groove, when the unit core is combined into annular core component, the protruding block of one of the two adjacent unit cores is clamped into the clamping groove of the other, and the positioning boss is clamped into the positioning groove, so that the yoke parts of multiple unit cores are combined into annular body.

[0008] The above-mentioned clamping groove is provided with a curved circle near the positioning boss.

[0009] The end of the tooth part is provided with a shoe part.

[0010] A stator assembly comprises a stator core, a coil winding and an end insulation, characterized in that the stator core is the stator core as described above, the end insulation is installed on the end face of the stator core, the end insulation on each tooth part is provided with an inner baffle and an outer baffle, a winding slot is formed between the inner baffle and the outer baffle, a plurality of wire entry and exit notches are arranged on the outer baffle, the plurality of wire entry and exit notches divide the outer baffle into two side outer baffles and a middle outer baffle, a plurality of wire passing grooves are arranged on the outer surface of the middle outer baffle, the coil winding is wound on each tooth part and forms a bridge wire, the bridge wire enters and exits through the wire entry and exit notches and is attached to the wire passing grooves on the outer surface of the outer baffle, a bendable positioning component is arranged at the bottom of the two side outer baffles between the two adjacent outer baffles, and the positioning component is used for fixing the bridge wire and preventing the bridge wire from being loose.

[0011] The positioning component, the inner baffle, the outer baffle and the end insulation are integrally injection molded.

[0012] The positioning component is a planar plastic plate.

[0013] The inner surface of the positioning component is provided with a plurality of empty grooves corresponding to the wire passing grooves.

[0014] The top of the positioning component is provided with buckles, the top of the two side outer baffles is provided with a positioning step, the buckles are buckled on the positioning step of the two side outer baffles between the two adjacent outer baffles by bending the positioning component.

[0015] A first groove is arranged in the middle of the positioning component, when the unit iron core is spliced into a ring-shaped iron core component, the positioning component is bent and deformed along with the ring-shaped iron core component, so that a V-shaped structure is formed, and an included angle φ formed after the deformation of the positioning component, the range of the included angle φ is 30°<φ<180°.

[0016] A second groove is arranged at the bottom of the positioning component.

[0017] A motor comprises the stator assembly, and the stator assembly is the stator assembly as described above.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1. A stator core comprising a plurality of unit cores, each unit core comprising a yoke portion and a tooth portion extending outwardly from an outer side edge of the yoke portion, and a slot being formed between adjacent two tooth portions, characterized in that one side of the yoke portion is provided with a protrusion, the other side of the yoke portion is provided with a clamping groove, the protrusion is provided with a positioning recess, and the clamping groove is provided with a positioning boss matched with the positioning recess, when the unit cores are combined into a ring-shaped core component, the protrusion of one of the adjacent two unit cores is clamped into the clamping groove of the other, and the positioning boss is clamped into the positioning recess at the same time, so that the yoke portions of the plurality of unit cores are combined into a ring-shaped body, and the entire assembly can be effectively locked by the locking structure of the stator core, so that the core assembly can maintain a circular state and proceed to the next production process.

[0020] 2. A stator assembly comprising a stator core, a coil winding and an end insulation, characterized in that the stator core is the stator core as described above, the end insulation is installed on the end face of the stator core, the end insulation on each tooth portion is provided with an inner baffle and an outer baffle, a winding slot is formed between the inner baffle and the outer baffle, a plurality of wire entry and exit notches are provided on the outer baffle, the plurality of wire entry and exit notches divide the outer baffle into two side outer baffles and a middle outer baffle, a plurality of wire passing grooves are provided on the outer surface of the middle outer baffle, the coil winding is wound on each tooth portion and forms a bridge wire, the bridge wire enters and exits from the wire entry and exit notches and is attached to the wire passing grooves on the outer surface of the outer baffle, a bendable positioning component is arranged at the bottom of the two side outer baffles between the adjacent two outer baffles, the positioning component is used for fixing the bridge wire and preventing the bridge wire from loosening, and the positioning component can effectively prevent the bridge wire from loosening and realize the winding of the strip-shaped stator, so as to ensure the product quality.

[0021] 3. Other advantages of the utility model are described in detail in the embodiment part of the specification. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A unit core perspective view provided for the embodiment one of the utility model;

[0023] Figure 2 A stator core perspective view provided for the embodiment one of the utility model;

[0024] Figure 3 A Figure 2 A local enlarged view of A;

[0025] Figure 4 A stator assembly strip-shaped state view provided for the embodiment two of the utility model;

[0026] Figure 5 Another stator assembly strip-shaped state view provided for the embodiment two of the utility model;

[0027] Figure 6 A stator assembly structure schematic view provided for the embodiment two of the utility model;

[0028] Figure 7 For Figure 6 A local enlarged view of the middle B. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0030] Embodiment one:

[0031] As Figures 1 to 3 shown, the embodiment provides a stator core, which comprises a plurality of unit cores 1, the unit core 1 comprises a yoke part 11 and a tooth part 12 extending outwards from the outer side edge of the yoke part 11, a line slot 10 is formed between the adjacent two tooth parts 12, and the yoke part 11 is characterized in that one side of the yoke part 11 is provided with a protrusion 111, the other side of the yoke part 11 is provided with a clamping groove 112, the protrusion 111 is provided with a positioning groove 1111, the clamping groove 112 is provided with a positioning boss 1121 matched with the positioning groove 1111, when the unit cores 1 are spliced into a ring-shaped core component 100, the protrusion 111 of one of the adjacent two unit cores 1 is clamped into the clamping groove 112 of the other, and at the same time, the positioning boss 1121 is clamped into the positioning groove 1111, so that the yoke parts 11 of the plurality of unit cores 1 are combined into a ring-shaped body, the above-mentioned locking structure of the stator core can effectively lock the whole assembly, and ensures that the core assembly can maintain a circular state and proceed to the next process production.

[0032] The above-mentioned clamping groove 112 is provided with a curved circle 1122 close to the positioning boss 1121, which prevents interference during locking, and the structure arrangement is reasonable.

[0033] The above-mentioned tooth part 12 is provided with a boot part 13 at the end.

[0034] Embodiment two:

[0035] As Figure 3 , Figures 4 to 7As shown, a kind of stator assembly, including stator core, coil winding 2 and end insulation 3, it is characterized in that: the stator core is described in embodiment one Stator core, end surface of stator core installs end insulation 3, the end insulation 3 on each tooth portion 12 is provided with inner baffle 31 and external baffle 32, and the inner baffle 31 and external baffle 32 form winding slot 33 between them, and a plurality of wire entry and exit notches 321 are provided on the external baffle 32, the plurality of wire entry and exit notches 321 divide the external baffle 32 into two side outer baffles 322 and intermediate outer baffles 323, a plurality of wire passing grooves 324 are provided on the outer surface of the intermediate outer baffles 323, the coil winding 2 is wound on each tooth portion 12 and forms a bridge wire 20, the bridge wire 20 enters and exits from the wire entry and exit notches 321 and is attached to the wire passing grooves 324 on the outer surface of the external baffle 32, and bendable positioning components 4 are provided at the bottom of the two side outer baffles 322 between the two adjacent external baffles 32, the positioning components 4 are used to fix the bridge wire 20 to prevent it from loosening, and the positioning components can effectively ensure that the bridge wire does not loosen and can also realize the coiling of the strip-shaped stator to ensure product quality.

[0036] The positioning components 4, the inner baffles 31, the external baffles 32, and the end insulation 3 described above are integrally injection molded, which is convenient to manufacture and has a reasonable structure arrangement.

[0037] The positioning components 4 described above are flat plastic plates, which can be bent and deformed to effectively ensure that the bridge wire does not loosen and can also realize the coiling of the strip-shaped stator to ensure product quality.

[0038] The inner surface of the positioning components 4 described above is provided with a plurality of empty grooves 41 corresponding to the wire passing grooves 324, which has a reasonable structure arrangement and is convenient for positioning the bridge wire.

[0039] The top sides of the positioning components 4 described above are provided with buckles 42, and the top of the two side outer baffles 322 is provided with positioning steps 3221, the buckles 42 are buckled on the positioning steps 3221 of the two side outer baffles 322 between the two adjacent external baffles 32 by bending the positioning components 4, which has a fixing effect and a reasonable structure arrangement.

[0040] The positioning components 4 described above are provided with a first groove 43 in the middle, when the unit iron core 1 is spliced into a ring-shaped iron core component 100, the positioning components 4 are bent and deformed with the ring-shaped iron core component 100 to form a V shape, the included angle φ formed after the deformation of the positioning components 4 is in the range of 30°<φ<180°, the first groove has a convenient bending structure arrangement and a reasonable structure arrangement.

[0041] The bottom of the positioning components 4 described above is provided with a second groove 44.

[0042] Embodiment three:

[0043] A motor comprising a stator assembly, characterized in that the stator assembly is the stator assembly described in Embodiment 2.

[0044] The above embodiments are the preferred embodiments of the present application, but the embodiments of the present application are not limited thereto, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present application are equivalent replacement modes, and are all included in the protection scope of the present application.

Claims

1. A stator core comprising a plurality of unit cores (1), the unit core (1) comprising a yoke portion (11) and a tooth portion (12) extending outward from an outer side edge of the yoke portion (11), a slot (10) for inserting a coil wire being formed between two adjacent tooth portions (12), characterized in that: The yoke part (11) is provided with a protrusion (111) on one side and a clamping groove (112) on the other side, the protrusion (111) is provided with a positioning groove (1111), and the clamping groove (112) is provided with a positioning boss (1121) matched with the positioning groove (1111), when the unit iron core (1) is spliced into a ring-shaped iron core component (100), the protrusion (111) of one of the two adjacent unit iron cores (1) is clamped into the clamping groove (112) of the other, and meanwhile the positioning boss (1121) is clamped into the positioning groove (1111), so that the yoke parts (11) of the plurality of unit iron cores (1) are combined into a ring-shaped body.

2. A stator core according to claim 1, characterized in that: A curved circle (1122) is arranged at the position close to the positioning boss (1121) in the clamping groove (112).

3. A stator core according to claim 1, characterized in that: The end part of the tooth part (12) is provided with a shoe part (13).

4. A stator assembly comprising a stator core, a coil winding (2) and an end insulation (3), characterized in that: The end surface of the stator core is provided with an end insulation (3), the end insulation (3) on each tooth part (12) is provided with an inner baffle (31) and an outer baffle (32), a winding slot (33) is formed between the inner baffle (31) and the outer baffle (32), the outer baffle (32) is provided with a plurality of wire entry and exit notches (321), the plurality of wire entry and exit notches (321) divide the outer baffle (32) into two side outer baffles (322) and a middle outer baffle (323), the outer surface of the middle outer baffle (323) is provided with a plurality of wire passing grooves (324), the coil winding (2) is wound on each tooth part (12) and forms a bridge wire (20), the bridge wire (20) enters and exits from the wire entry and exit notches (321) and is attached to the wire passing grooves (324) on the outer surface of the outer baffle (32), the bottom of the two side outer baffles (322) between the two adjacent outer baffles (32) is provided with a bendable positioning component (4), and the positioning component (4) is used for fixing the bridge wire (20) and preventing the bridge wire (20) from being loose.

5. A stator assembly as claimed in claim 4, characterised in that: The positioning component (4), the inner baffle (31), the outer baffle (32) and the end insulation (3) are integrally injection molded.

6. A stator assembly as claimed in claim 5, characterised in that: The positioning component (4) is a planar plastic plate.

7. A stator assembly as claimed in claim 6, characterised in that: The inner surface of the positioning component (4) is provided with a plurality of empty grooves (41) corresponding to the wire passing grooves (324).

8. A stator assembly as claimed in claim 7, characterised in that: The top of the positioning component (4) is provided with buckles (42), the top of the two side outer baffles (322) is provided with positioning steps (3221), the buckles (42) are buckled on the positioning steps (3221) of the two side outer baffles (322) between the two adjacent outer baffles (32) by bending the positioning component (4).

9. A stator assembly as claimed in claim 8, characterised in that: A first groove (43) is arranged in the middle of the positioning component (4), when the unit iron core (1) is spliced into a ring-shaped iron core component (100), the positioning component (4) is bent and deformed along with the ring-shaped iron core component (100), so as to form a V-shaped structure, the included angle φ formed after the deformation of the positioning component (4) is 30°<φ<180°.

10. A stator assembly as claimed in claim 9, characterised in that: The bottom of the positioning component (4) is provided with a second groove (44).

11. An electric machine comprising a stator assembly, characterized by: The stator assembly is the stator assembly of any one of claims 4 to 10.

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