Plastic package stator and plastic package motor

Abstract

The utility model provides a plastic package stator and a plastic package motor, the plastic package stator comprises a plastic package stator main body, an outgoing line structure and a stator power supply outgoing line, the outgoing line structure comprises an insulation end plate, one end of the insulation end plate is far away from the center of the plastic package stator main body, and the insulation end plate protrudes out of the circumferential side surface of the plastic package stator main body; the insulating end plate is provided with a wire crack, a wire groove and a flag-shaped terminal fixing groove, the stator power supply outgoing line sequentially penetrates through the wire crack and the wire groove and is led out from the flag-shaped terminal fixing groove, and a flag-shaped terminal is inserted into the flag-shaped terminal fixing groove. And one end of the flag-shaped terminal, which is provided with a piercing knife edge, is inserted into the flag-shaped terminal fixing groove, and the other end of the flag-shaped terminal is provided with an insertion sheet and is exposed outside the wire outlet structure. The utility model provides the plastic package motor wire outlet structure which is compact in structure, high in reliability and convenient for automatic large-scale production.

Description

Technical Field

[0001] The utility model relates to the field of motors, and particularly to a plastic-encapsulated stator and a plastic-encapsulated motor. Background Art

[0002] In the motor industry, with the popularization and use of variable-frequency motors, the popularity rate of plastic-encapsulated motors is also getting higher and higher. Compared with non-plastic-encapsulated motors, plastic-encapsulated motors have great advantages in terms of performance such as noise, temperature rise, product consistency, and motor protection. However, due to the material-sealing characteristics of the mold structure of plastic-encapsulated motors, a certain pressure must be applied to the material-sealing part to seal the material. As the motor lead-out wire is the power input, its insulation performance is very important, and the insulation skin of the wire is not allowed to be damaged. The temperature during BMC injection molding can reach 130°C, and the pressure value can reach 9 MPa. Protecting the power lead-out wire is the top priority of plastic-encapsulated motors. In the mass production of existing plastic-encapsulated motors, regardless of the solution, there is a probability of varying degrees that the power lead-out wire is damaged during the injection molding process of the motor stator.

[0003] The existing wire-out methods of plastic-encapsulated motors are roughly divided into two types: One is the method of leading out after crimping the enameled wire and the power line, that is, a flat structure is injection-molded on the power line in advance with thermoplastic plastic, or two pieces of plastic are used to wrap the power line in the form of clip pieces to form a flat structure for leading out and sealing the power line during the plastic encapsulation of the stator. The defect of this method is that the power line needs to be injection-molded, and it is easy to cause damage to the power line during the injection molding process, affecting the production yield and product safety; the process of crimping the enameled wire and the power line is not easy to carry out automated production, and the production efficiency is low. The other is the method of welding the enameled wire to the terminal, then injection-molding the bare terminal, and then welding the bare terminal to the PCB board with the power lead-out wire by soldering. The defects of this method are that the applicable enameled wire diameter is limited; the soldering process is not environmentally friendly and harmful to the human body; the axial dimension of the motor is relatively large due to the need to install the PCB; during injection molding, the assembly after soldering the enameled wire and the terminal is directly exposed to the impact of the injection molding material, which is easy to cause damage to the enameled wire and result in wire breakage or false soldering.

[0004] Therefore, it is crucial to study a new type of plastic-encapsulated stator wire-out structure that can connect the enameled wire to the terminal, ensure material sealing, protect the connection part of the enameled wire, and lead out the power line. Summary of the Utility Model

[0005] To solve the above technical problems, the present utility model provides a plastic-encapsulated stator, comprising a plastic-encapsulated stator body, a wire outlet structure, and a stator power lead-out wire. The wire outlet structure includes an insulating end plate whose one end away from the center of the plastic-encapsulated stator body protrudes from the circumferential side surface of the plastic-encapsulated stator body. A wire clamping slot, a wire groove, and a flag terminal fixing slot are provided on the insulating end plate. The stator power lead-out wire sequentially passes through the wire clamping slot and the wire groove and is led out from the flag terminal fixing slot. A flag terminal is inserted into the flag terminal fixing slot. One end of the flag terminal with a puncturing blade is inserted into the flag terminal fixing slot, and the other end is provided with an insertion piece and is exposed outside the wire outlet structure.

[0006] Further, one end of the flag terminal with a puncturing blade is vertically inserted into the flag terminal fixing slot, and the other end is provided with an insertion piece in the vertical direction and is exposed outside the wire outlet structure.

[0007] Further, the puncturing blade is an inverted U-shaped structure penetrating the flag terminal.

[0008] Further, a plurality of equal amounts of the wire clamping slot, the wire groove, and the flag terminal fixing slot are arranged in parallel.

[0009] Further, the openings of the wire clamping slot, the wire groove, and the flag terminal fixing slot are linearly aligned.

[0010] Further, the insulating end plate extends out a first end plate sealing surface along the lead-out direction of the stator power lead-out wire from the bottom of the flag terminal fixing slot.

[0011] Further, stepped second end plate sealing surfaces perpendicular to the first end plate sealing surface are respectively provided on both sides of the insulating end plate.

[0012] Further, the wire outlet structure further includes a connector plastic shell. The connector plastic shell is respectively provided with a first plastic shell sealing surface and a stepped second plastic shell sealing surface that cooperate with the first end plate sealing surface and the second end plate sealing surface to increase the sealing area and form a cavity structure inside the flag terminal fixing slot.

[0013] Further, the plastic-encapsulated stator is an injection molded part.

[0014] A plastic-encapsulated motor includes the above-mentioned plastic-encapsulated stator.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] The utility model combs the stator power supply lead-out wire through the wire clamping slot and wire groove on the insulating end plate, and then leads out the stator power supply lead-out wire to the flag-shaped terminal fixing slot. The puncture blade of the flag-shaped terminal is used to cooperate with the stator power supply lead-out wire to realize the lead-out of the power supply of the plastic-encapsulated motor, providing a wire outlet structure for the plastic-encapsulated motor with a compact structure, high reliability and convenient for large-scale automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 is a cross-sectional view of the partial structure of the stator injection molding in the utility model;

[0019] Figure 3 is a schematic diagram of the wire outlet structure of the insulating end plate in the utility model;

[0020] Figure 4 is a schematic diagram of the connector plastic shell structure in the utility model;

[0021] Figure 5 is a schematic diagram of the flag-shaped terminal structure in the utility model.

[0022] In the figure: 1. Plastic-encapsulated stator main body; 2. Insulating end plate; 21. Flag-shaped terminal; 22. Connector plastic shell; 23. Wire clamping slot; 24. Wire groove; 25. Flag-shaped terminal fixing slot; 26. First end plate sealing surface; 27. Second end plate sealing concave surface; 211. Puncture blade; 212. Insert piece; 221. First plastic shell sealing surface; 222. Second plastic shell sealing convex surface; 223. Die matching sealing surface; 224. Flag-shaped terminal lead-out port; 3. Stator power supply lead-out wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the technical solutions and technical effects of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments.

[0024] As Figure 1 and Figure 2 shown, a plastic-encapsulated stator is an injection molded part, including a plastic-encapsulated stator main body 1, a wire outlet structure and a stator power supply lead-out wire 3. The wire outlet structure includes an insulating end plate 2 protruding from the circumferential side surface of the plastic-encapsulated stator main body 1 at one end far from the center of the plastic-encapsulated stator main body 1. A flag-shaped terminal 21 is vertically arranged on the insulating end plate 2. As Figure 5As shown in the figure, the flag-shaped terminal 21 includes a piercing blade 211 and an insertion piece 212 located above the piercing blade 211, wherein the piercing blade is an inverted U-shaped structure that penetrates the flag-shaped terminal 21. The piercing blade 211 in the flag-shaped terminal 21 is used to pierce the stator power supply lead 3 to realize the connection between the stator power supply lead 3 and the insertion piece 212 in the flag-shaped terminal 21.

[0025] As Figure 3 shown in the figure, the insulating end plate 2 is provided with a wire slit 23, a wire groove 24 and a flag-shaped terminal fixing groove 25 with their openings linearly aligned. In the design, multiple equal amounts of wire slits 23, wire grooves 24 and flag-shaped terminal fixing grooves 25 are linearly aligned, so that the stator power supply lead 3 can be very easily introduced into the wire groove 24 through the wire slit 23. The stator power supply lead 3 sequentially passes through the wire slit 23 and the wire groove 24 and is led out from the flag-shaped terminal fixing groove 25.

[0026] Preferably, the wire slit 23, the wire groove 24 and the flag-shaped terminal fixing groove 25 are respectively parallel to each other and there are three of them. The three stator power supply leads 3 first pass through the wire slits 23 respectively, then pass through the wire grooves 24 respectively, and then the three stator power supply leads 3 are introduced into the flag-shaped terminal fixing groove 25. Then, one end of the three flag-shaped terminals 21 with the piercing blade 211 is vertically inserted into the flag-shaped terminal fixing groove 25, and the insertion piece 212 at the other end is exposed outside the wire outlet structure.

[0027] Refer to Figure 3 and Figure 4 , the insulating end plate 2 extends from the bottom of the flag-shaped terminal fixing groove 25 along the lead-out direction of the stator power supply lead 3 to form a first end plate sealing surface 26. On both sides of the insulating end plate 2, there are groove-shaped second end plate sealing concave surfaces 27 perpendicular to the first end plate sealing surface 26 respectively.

[0028] The wire outlet structure further includes a connector plastic housing 22, and the connector plastic housing 22 is provided with a first plastic housing sealing surface 221 and a stepped second plastic housing sealing convex surface 222 that respectively cooperate with the first end plate sealing surface 26 and the second end plate sealing concave surface 27. The flag-shaped terminal lead-out openings 224 on the connector plastic housing 22 are aligned with the three flag-shaped terminals 21 for insertion and fixation. By using the stepped and groove-shaped sealing surfaces to achieve a roundabout path, the sealing area is increased, and the sealing effect is strengthened.

[0029] Preferably, the wire groove 24 is a semi-circular structure, so that when the stator power supply lead 3 is introduced into the wire groove 24, part of the wire protrudes from the sealing surface.

[0030] When the first encapsulation surface 221 of the connector plastic housing 22 mates with the first end plate encapsulation surface 26 of the insulating end plate 2, the stator power lead 3 protruding from the encapsulation surface will be squeezed. During injection molding, the mold applies a certain pressure to the mold mating encapsulation surface 223 of the connector plastic housing 22, so that the above-mentioned mating encapsulation surfaces fit tightly together without gaps, effectively preventing the injection molding material from entering the flag terminal fixing groove 25 through the wire groove 24, forming a cavity structure inside the flag terminal fixing groove 25, protecting the connection between the piercing blade 211 of the flag terminal 21 and the stator power lead 3 from the impact of high temperature and high pressure during injection molding, and ensuring the reliability and consistency of the connection of the stator power lead 3 of the motor.

[0031] The utility model designs a plastic encapsulated stator and a plastic encapsulated motor. The stator power lead 3 is combed through the wire slit 23 and the wire groove 24 on the insulating end plate 2, and then led out of the flag terminal fixing groove 25. The piercing blade 211 of the flag terminal 21 is used to cooperate with the stator power lead 3 to realize the extraction of the power supply of the plastic encapsulated motor. Then, the encapsulation structure of the connector plastic housing 22 is used to protect the wire outlet structure during injection molding. The wire outlet structure of the plastic encapsulated motor has the advantages of compact structure, high reliability, low cost, and being convenient for large-scale automated production.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic-encapsulated stator, comprising a plastic-encapsulated stator body (1), an outlet structure and a stator power outlet wire (3), characterized in that: The lead-out structure comprises an insulating end plate (2) with one end away from the center of the plastic-encapsulated stator body (1) protruding from the circumferential side of the plastic-encapsulated stator body (1), and the insulating end plate (2) is provided with a wire clamping gap (23), a wire groove (24) and a flag-shaped terminal fixing groove (25); The stator power lead wire (3) passes through the wire slit (23) and the wire groove (24) in sequence and is led out from the flag-shaped terminal fixing groove (25); a flag-shaped terminal (21) is inserted into the flag-shaped terminal fixing groove (25); one end of the flag-shaped terminal (21) with a piercing blade (211) is inserted into the flag-shaped terminal fixing groove (25), and the other end is provided with an insert (212) and is exposed outside the lead structure.

2. The plastic-encapsulated stator according to claim 1, characterized in that: One end of the flag-shaped terminal (21) with the piercing blade (211) is vertically inserted into the flag-shaped terminal fixing groove (25), and the other end is provided with an insert (212) in a vertical direction and exposed on the outside of the outlet structure.

3. The plastic-encapsulated stator according to claim 1, characterized in that: The piercing blade (211) is an inverted U-shaped structure that penetrates the flag-shaped terminal (21).

4. The plastic-encapsulated stator according to claim 1, characterized in that: The wire clamping gap (23), the wire groove (24) and the flag-shaped terminal fixing groove (25) are arranged in parallel in equal numbers.

5. The plastic-encapsulated stator according to claim 1, characterized in that: The openings of the wire clamping gap (23), the wire groove (24) and the flag-shaped terminal fixing groove (25) are all aligned in a straight line.

6. The plastic-encapsulated stator according to claim 1, characterized in that: The insulating end plate (2) has a first end plate sealing surface (26) extending from the bottom of the flag-shaped terminal fixing groove (25) along the direction in which the stator power lead wire (3) is led out.

7. The plastic-encapsulated stator according to claim 6, characterized in that: The insulating end plate (2) is provided with groove-shaped second end plate sealing concave surfaces (27) respectively on both side edges thereof, which are perpendicular to the first end plate sealing surface (26).

8. The plastic-encapsulated stator according to claim 7, characterized in that: The outlet structure further comprises a connector plastic shell (22), the connector plastic shell (22) being provided with a first plastic shell sealing surface (221) and a stepped second plastic shell sealing convex surface (222) respectively matching the first end plate sealing surface (26) and the second end plate sealing concave surface (27) so as to increase the sealing area and form a cavity structure inside the flag-shaped terminal fixing groove (25).

9. The plastic-encapsulated stator according to claim 1, characterized in that: The plastic-sealed stator is an injection-molded part.

10. A plastic-encapsulated motor, characterized in that: It comprises the plastic-encapsulated stator as described in any one of claims 1 to 9.

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