CN218586969U

CN218586969U - Plastic package stator and motor using same

Info

Publication number: CN218586969U
Application number: CN202222844281.1U
Authority: CN
Inventors: 王红标; 敖林
Original assignee: Jiangmen Tiandi Electrical Appliance Co ltd
Current assignee: Jiangmen Tiandi Electrical Appliance Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-03-07
Anticipated expiration: 2032-10-27

Abstract

The utility model provides a plastic envelope stator and motor, this plastic envelope stator includes stator module and plastic envelope shell, and stator module includes iron core, coil former and coil, its characterized in that: the stator assembly further comprises a plastic blocking piece fixed on the annular yoke portion of the iron core, a radial gap is formed between the radial surface of the plastic blocking piece and the radial surface of the coil frame close to the plastic blocking piece, the outgoing line of the coil penetrates through the radial gap, the plastic package shell is injected on the stator assembly, and the plastic package shell, the coil frame and the plastic blocking piece are combined to wrap the coil and the outgoing line of the coil. The outgoing line of the coil is crossed through the radial gap formed by the plastic blocking piece arranged on the yoke part and the coil rack, the probability that the outgoing line is exposed radially due to impact of molten plastic on the outgoing line when the module forms the plastic package shell through injection molding of the stator assembly is reduced, and the production yield of the plastic package stator is improved.

Description

Plastic package stator and motor using same

Technical Field

The utility model relates to a plastic envelope stator especially relates to an use motor of this plastic envelope stator, and its IPC classification number is H02K3/46.

Background

The stator assembly of the existing external rotor motor comprises an iron core, a coil and a plurality of coil frames which are independently arranged on the iron core. When the coil is produced, the coil is wound on the coil frame, and after the number of winding turns is reached, the outgoing line of the coil is led to the other coil frame in the same phase for winding. For the stability of promotion motor, stator module still need put into the mould usually and moulds plastics, forms the plastic envelope shell that carries out the parcel to the coil on stator module. The outgoing line generated between the coils is easy to be broken or exposed out of the plastic package under the impact of the melted plastic when the plastic package is produced by injection molding, so that the production reject ratio is higher.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the utility model provides a following technical scheme:

the utility model provides a plastic envelope stator, includes stator module and plastic envelope shell, stator module includes iron core, coil former and coil, its characterized in that: the stator assembly further comprises a plastic blocking piece fixed on the annular yoke portion of the iron core, a radial gap is formed between the radial surface of the plastic blocking piece and the radial surface of the coil frame close to the plastic blocking piece, the outgoing line of the coil penetrates through the radial gap, the plastic package shell is injected on the stator assembly, and the plastic package shell, the coil frame and the plastic blocking piece are combined to wrap the coil and the outgoing line of the coil.

The utility model discloses a plastic envelope stator, the lead-out wire that supplies the coil through the radial space that sets up plastics shelves spare on yoke portion and coil former formed crosses the line, and molten plastic leads to radial exerted probability to the lead-out wire impact when reducing stator module and moulding plastics the formation plastic envelope shell, promotes plastic envelope stator's production qualification rate.

Further, the iron core further comprises a tooth part extending outwards from the radial surface of the yoke part, the coil frame is inserted and installed in the tooth part, and the coil frame comprises a hollow cylindrical coil frame body, a first stop block 1 extending outwards from one axial end of the coil frame body in the radial direction, and a second stop block 2 extending outwards from the other axial end of the coil frame body in the radial direction.

Furthermore, the plastic stopper is fixed on the iron core by injection molding and comprises a connecting part and a blocking part, wherein the annular main body part radially extends out of the main body part, and the blocking part extends out of the axial end face of the connecting part.

Further, the axial projection of the blocking portion is wavy.

Further, the plastic stopper comprises a 1 st plastic stopping part and a 2 nd plastic stopping part which are oppositely connected.

Further, the iron core is formed by connecting the end portions of the iron core in a strip shape through a rolling circle, and a plurality of notches are arranged on the end face, back to the tooth portion, of the yoke portion of the iron core before the iron core is rolled, so that the iron core can be bent conveniently.

Further, the notch is located in the middle of two teeth.

The utility model discloses still disclose a motor:

the utility model provides a motor, includes casing, external rotor subassembly, bearing and above-mentioned arbitrary plastic envelope stator, its characterized in that: the outer rotor assembly comprises a rotor shell and a permanent magnet, a rotating shaft fixedly connected with the rotor shell is fixed on the rotating shaft shell, the plastic package stator and the bearing are fixedly arranged on the shell, and the rotating shaft penetrates through the inner ring of the bearing and is rotatably arranged on the shell.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of a plastic-encapsulated stator according to the present invention;

fig. 2 is a cross-sectional view of a first embodiment of the plastic-encapsulated stator of the present invention;

fig. 3 is a schematic perspective view of a first embodiment of a stator assembly of the present invention;

figure 4 is a top view of a first embodiment of the stator assembly of the present invention;

fig. 5 is a schematic perspective view of the iron core of the present invention;

fig. 6 is a schematic view of a three-dimensional structure of the iron core before being rolled;

fig. 7 is a schematic view of a three-dimensional structure of a plastic stopper according to a first embodiment of the present invention, which is injection-molded on an iron core;

fig. 8 is a schematic perspective view of the coil bobbin of the present invention;

fig. 9 is a sectional view of a motor to which a plastic encapsulated stator according to a first embodiment of the present invention is applied;

fig. 10 is an exploded view of a plastic stopper and an iron core according to a second embodiment of the present invention;

wherein: 10-plastic package stator, 20-shell, 30-outer rotor component, 31-rotor shell, 32-rotating shaft, 33-permanent magnet, 40-bearing, 100-stator component, 110-iron core, 111-yoke part, 112-tooth part, 113-notch, 120-coil rack, 121-coil rack main body, 122-1 st block, 123-2 nd block, 130-coil, 140-plastic block, 140' -plastic block, 141-main body part, 141' -1 st plastic block part, 142-connecting part, 142' -2 nd plastic block part, 143-block part, 200-plastic package shell

Detailed Description

Example 1:

referring to fig. 1 to 5, the present invention discloses a plastic-packaged stator, which includes a stator assembly 100 and a plastic-packaged housing 200, wherein the stator assembly 100 includes an iron core 110, a coil frame 120 disposed on the iron core 110, and a coil 130 wound on the coil frame 120, and the iron core 110 includes an annular yoke portion 111 and a tooth portion 112 extending outward from a radial surface of the yoke portion 110. In order to reduce the probability that the injected high-pressure high-temperature molten plastic impacts the inter-winding leads to displacement and is exposed on the surface of the plastic package shell when the plastic package shell is produced, the stator assembly 100 further comprises an annular plastic blocking piece 140 arranged on the outer side of the yoke part, a radial gap is formed between the radial outer surface of the plastic blocking piece 140 and the coil rack 120, and a lead-out wire of the coil 130, which is connected to another coil in the same phase after the coil rack 120 is wound, penetrates through the radial gap. Referring to fig. 2, the plastic casing 200 is formed by injection molding on the basis of the stator assembly 100, and the plastic casing 200 is combined with the bobbin 120 and the plastic stopper 140 to wrap the coil 130 and the lead wires thereof, so that the coil 130 and the lead wires thereof are not exposed.

Referring to fig. 5 and 6, in order to improve the utilization rate of the core material and reduce the production cost. The iron core 110 of the utility model is formed by laminating a plurality of strip-shaped iron core sheets and then rolling the iron core sheets. As shown in fig. 6, before the bar-shaped iron core 110 is rounded, a plurality of notches 113 are provided on the end surface of the yoke portion facing away from the teeth portion. Further, the notch 113 is provided between two tooth portions 112.

Referring to fig. 8, the bobbin 120 of the present invention includes a bobbin body 121 having a hollow cylindrical shape, a 1 st stopper 122 radially outwardly extending from one axial end of the bobbin body 121, and a 2 nd stopper 123 radially outwardly extending from the other axial end of the bobbin body 121. Referring to fig. 3 and 7, the bobbin 120 is inserted through a hollow hole of the bobbin body 121 and fitted over the teeth 112 of the core 110. This design is convenient for the coil and is twined, promotes the production efficiency of plastic envelope stator.

Referring to fig. 3, the plastic stopper 140 of the present embodiment is formed by injection molding on the basis of the iron core 110. Referring to fig. 7, the plastic stopper 140 of the present embodiment includes a ring-shaped main body portion 141, a connecting portion 142 radially protruding from the main body portion 141 at an upper side and/or a lower side of the core tooth portion, and a blocking portion 143 protruding from an axial end surface of the connecting portion 142. The design ensures that the plastic package blocking piece is more tightly connected with the iron core, avoids the damage caused by collision with a mold due to the fact that the plastic blocking piece moves when a plastic package is subsequently injected, and improves the qualification rate of producing the plastic package stator. Further, as seen in fig. 4, the axial projection of the blocking portion 143 is wave-shaped, which further increases the strength of the plastic stopper and prevents the plastic stopper from being damaged by impact during injection molding of the plastic capsule.

The utility model discloses still disclose the motor of using above-mentioned plastic envelope stator, see figure 9, this motor includes casing 20, external rotor assembly 30, bearing 40 and foretell plastic envelope stator 10. The outer rotor assembly 30 includes a rotor housing 31, a rotating shaft 32 fixedly connected to the rotor housing 31, and a permanent magnet 33 fixed to the rotor housing 31, the plastic-sealed stator and the bearing 40 are fixedly mounted on the housing 20, and the rotating shaft 32 passes through an inner ring of the bearing 40 and is rotatably mounted on the housing 20. In the mounted state, the inner circumferential surface of the permanent magnet 33 is disposed opposite to the outer circumferential surface of the mold stator 10. The utility model discloses a motor, through the production and the assembly of the part of being convenient for of foretell design, play the production efficiency who promotes the motor.

Example 2:

compared with embodiment 1, the structure of the plastic stopper 140 is different, and the structure of other parts is the same as that of embodiment 1.

Referring to fig. 10, the plastic blocking member 140 of this embodiment includes a 1 st plastic blocking portion 141 'and a 2 nd plastic blocking portion 142'. The 1 st plastic stopper 141 'and the 2 nd plastic stopper 142' are inserted and fixed to the yoke portion 111 of the core 110. As a preferred embodiment, the axial surface of the 1 st plastic blocking part 141 'protrudes out of a hollow threaded mounting post, the axial surface of the 2 nd plastic blocking part 142' is provided with a mounting hole, the axial surface of the iron core 110 is provided with an iron core mounting hole, and the mounting post of the 1 st plastic blocking part 141 'passes through the iron core mounting hole and the mounting hole of the 2 nd plastic blocking part 142' and is screwed into the mounting post by a screw, so that the three parts are fixedly connected. As another embodiment, the 1 st plastic blocking portion 141 'and the 2 nd plastic blocking portion 142' may be connected by a snap or a fastening structure of other parts commonly used in the mechanical engineering manual, and the yoke portion of the iron core is snapped on a U-shaped groove formed after the 1 st plastic blocking portion 141 'and the 2 nd plastic blocking portion 142' are fastened and connected. The design can facilitate the simplification of the mold structure for producing the plastic stop block and the production and processing.

The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention are not departed from the spirit and scope of the present invention, provided they fall within the scope of the claims and the equivalent technical scope of the present invention, then the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a plastic envelope stator, includes stator module (100) and plastic envelope shell (200), stator module (100) are including iron core (110), coil former (120) and coil (130), its characterized in that: the stator assembly (100) further comprises a plastic blocking piece (140) fixed on the annular yoke portion (111) of the iron core (110), a radial gap (1) is formed between the radial surface of the plastic blocking piece (140) and the radial surface of the coil frame (120) close to the plastic blocking piece, the outgoing line of the coil (130) penetrates through the radial gap (1), the plastic sealing piece (200) is injected on the stator assembly (100), and the plastic sealing piece, the coil frame (120) and the plastic blocking piece (140) are combined to wrap the coil (130) and the outgoing line thereof.

2. The plastic package stator of claim 1, wherein: the iron core (110) further comprises a tooth part (112) extending outwards from the radial surface of the yoke part (111), and the coil frame (120) is inserted into the tooth part (112) and comprises a hollow cylindrical coil frame body (121), a 1 st stop block (122) extending outwards from one axial end of the coil frame body (121) in the radial direction, and a 2 nd stop block (123) extending outwards from the other axial end of the coil frame body (121) in the radial direction.

3. The plastic package stator according to claim 1 or 2, characterized in that: the plastic blocking piece (140) is fixed on the iron core (110) in an injection molding mode and comprises an annular main body part (141), a connecting part (142) extending out of the main body part in the radial direction and a blocking part (143) extending out of the axial end face of the connecting part.

4. The plastic encapsulated stator of claim 3, wherein: the axial projection of the blocking part (143) is wave-shaped.

5. The plastic encapsulated stator according to claim 1 or 2, characterized in that: the plastic blocking piece (140) is formed by connecting a 1 st plastic blocking part (141 ') and a 2 nd plastic blocking part (142').

6. The plastic package stator of claim 1, wherein: iron core (110) are the strip and form through the edge-to-edge connection, iron core (110) are equipped with several breach (113) and are convenient for bend on the terminal surface of back to tooth portion (112) of yoke portion (111) before the edge-to-edge.

7. The plastic package stator of claim 6, wherein: the notches (113) are located between two tooth parts (112).

8. An electric machine comprising a housing (20), an outer rotor assembly (30), a bearing (40) and the overmolded stator of any of claims 1 to 7, characterized in that: outer rotor subassembly (30) include rotor shell (31), with rotor shell (31) fixed connection's pivot (32), be fixed in permanent magnet (33) on rotor shell (31), plastic envelope stator and bearing (40) fixed mounting are in casing (20), the inner circle that pivot (32) passed through bearing (40) is rotationally installed in casing (20).