Plastic-sealed stator and motor

Abstract

The present invention provides a plastic-encapsulated stator and motor, which relate to the technical field of motors and solve the technical problem that the PG plate of the existing PG motor is press-fitted in the final assembly process and the assembly process is complicated. The plastic-encapsulated stator includes a PG component and a stator component, and the PG component and the stator component are integrally injection molded. Compared with the process of press-fitting the PG plate of the existing PG motor in the final assembly process, there is no need to press-fit the PG component during the final assembly process, which reduces the final assembly parts and simplifies the final assembly process, and can realize fully automated final assembly production, improve production efficiency, and enhance product quality consistency.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a plastic-sealed stator and a motor. Background Art

[0002] The PG motor is a motor with a Hall element. The speed regulation principle is that the Hall element receives the magnetic signal of the magnetic ring on the rotor and outputs the corresponding pulse signal to the terminal control board. Then, the operating voltage input to the PG motor is adjusted by adjusting the conduction angle of the thyristor to automatically control the speed.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] The PG assembly of the traditional plastic-encapsulated PG motor is fixed by placing the PG board on the inner circle step of the motor plastic-encapsulated stator and fixing it by riveting the end cover. Figure 1 At present, the PG board 41' of the general structure of the plastic-encapsulated motor is installed in the final assembly stage, and the employees operate the machine for pressing. The PG line 42' needs to be led out from the PG slot 43', and the process is complicated. In addition, since the PG component is easily offset and crushed by the end cover, it is difficult to realize the automatic pressing of the final assembly, and manual cooperation is still required for riveting, which has low production efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a plastic-encapsulated stator and motor to solve the technical problem that the PG plate of the existing PG motor in the prior art is press-fitted in the final assembly process, and the assembly process is complicated. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A plastic-sealed stator provided by the present invention comprises a PG component and a stator component, wherein the PG component and the stator component are integrally injection molded.

[0008] Optionally, the stator assembly includes a winding stator and a high-voltage wiring board, and the PG assembly and the high-voltage wiring board are separately arranged.

[0009] Optionally, the PG assembly includes a PG board and a PG line, and a positioning hole is formed on the PG board.

[0010] Optionally, the PG assembly further includes a PG auxiliary positioning piece, and the PG auxiliary positioning piece is fixed to the PG board.

[0011] Optionally, the PG auxiliary positioning piece is an annular structure, and its inner ring is arc-shaped and has a cutting angle.

[0012] Optionally, the PG board and the high-voltage wiring board are located in different planes.

[0013] Optionally, a plurality of positioning holes are provided on the PG board.

[0014] Optionally, the PG board and the winding stator are isolated and positioned by plastic packaging material.

[0015] Optionally, the PG component and the stator component are integrally injection molded using BMC plastic packaging material.

[0016] The present invention provides a motor, comprising any one of the above-mentioned plastic-encapsulated stators.

[0017] The present invention provides a plastic-encapsulated stator and motor, wherein the plastic-encapsulated stator comprises a PG component and a stator component, wherein the PG component and the stator component are integrally injection molded; compared with the existing process of press-fitting a PG plate of a PG motor in the final assembly process, there is no need to press-fit the PG component during the final assembly process, thereby reducing the number of final assembly parts, simplifying the final assembly process, realizing fully automated final assembly production, improving production efficiency, and enhancing product quality consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structure of a plastic-sealed motor in the prior art;

[0020] In the figure, 1', end cover; 2', rotor assembly; 3', magnetic ring; 41', PG board; 42', PG line; 43', PG slot; 5', plastic-encapsulated stator; 6', strong wire;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of a plastic-sealed stator provided in a specific embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the connection relationship between the stator assembly and the PG assembly of the present invention;

[0023] Figure 4 yes Figure 3 A schematic diagram of the partially enlarged structure of the middle PG plate and the PG auxiliary positioning piece;

[0024] Figure 5 yes Figure 3 A schematic diagram of the front view structure of

[0025] Figure 6It is a schematic cross-sectional structural diagram of the injection molding production of the plastic-sealed stator of the present invention;

[0026] Figure 7 yes Figure 6 A schematic diagram of the partially enlarged structure of part I;

[0027] Figure 8 It is a schematic cross-sectional structure diagram of a PG motor provided in a specific embodiment of the present invention.

[0028] In the figure, 1, PG assembly; 11, PG board; 111, positioning hole; 12, PG wire; 13, PG auxiliary positioning piece; 2, winding stator; 21, stator core positioning surface; 31, high-voltage wiring board I; 32, high-voltage wiring board II; 4, high-voltage wire; 5, six-hole outlet sheath; 6, upper mold core; 61, concave ejector pin; 7, BB cover; 8, plastic packaging material; 9, lower mold core; 91, convex ejector pin; 100, plastic packaging stator; 200, rotor assembly; 300, front end cover; 400, front shock absorber ring; 500, rear shock absorber ring. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] The present invention provides a plastic-encapsulated stator 100, comprising a PG component 1 and a stator component, wherein the PG component 1 and the stator component are integrally injection molded.

[0031] After the PG component 1 and the stator component are integrally injection molded, compared with the existing PG motor's PG plate press-fitting process in the final assembly process, there is no need to press-fit the PG component 1 during the final assembly process, which reduces the final assembly parts, simplifies the final assembly process, and can achieve fully automated final assembly production, thereby improving production efficiency and enhancing product quality consistency.

[0032] As an optional implementation, Figure 3 and Figure 5 As shown, the stator assembly 2 includes a winding stator 21 and a high-voltage wiring board, and the PG assembly 1 and the high-voltage wiring board are separately arranged.

[0033] In the traditional integrated design, the PG board and the high-voltage wiring board are welded to the winding stator. When the core size is constant and the theoretical installation position of the magnetic ring is constant, once the core stack thickness changes (the core is not suitable for injection molding), the sensing positions of the Hall and the magnetic ring will change. The most intuitive problem is that the injection molding fails. The PG component 1 of the present invention is designed as a split-type design of the high-voltage wiring board on the stator component 2. The purpose of the split design of the high-voltage and low-voltage components of the PG component 1 is to achieve the integrated injection molding of the built-in PG component 1 of the motor stator with different stack thicknesses. The PG component 1 is positioned for injection molding by the upper mold core 6 and the lower mold core 9 of the injection mold. The positioning of the PG component 1 is not affected by the core stack height and is accurately positioned, so that a mold can be used to inject a variety of core stack height solutions, improve the versatility of the mold, and reduce the investment cost of the mold.

[0034] As an optional implementation, the PG assembly 1 includes a PG board 11 and a PG line 12. The PG board 11 is provided with a positioning hole 111. Figure 3 .

[0035] The PG plate 11 is provided with a positioning hole 111, through which the positioning hole 111 is connected with the mold positioning ejector pin. Figure 7 As shown, it plays the role of injection positioning during injection molding.

[0036] The number and arrangement of the positioning holes 111 are consistent with the number and arrangement of the injection mold core and the mold cavity ejector pins.

[0037] As an optional implementation, the PG assembly 1 further includes a PG auxiliary positioning piece 13 , and the PG auxiliary positioning piece 13 is fixed to the PG board 11 .

[0038] The PG auxiliary positioning sheet 13 is used for positioning, which is convenient and quick.

[0039] As an optional implementation, Figure 4 As shown, the PG auxiliary positioning piece 13 is an annular structure, and its inner ring is an arc shape and has a cutting angle.

[0040] The PG auxiliary positioning piece 13 is fixed to the PG plate 11 before injection molding. The shape design of the arc in the middle of the PG auxiliary positioning piece 13 and the cutting angle is consistent with the injection mold core. Figure 4 The cutting angle a can be 45 degrees.

[0041] The arc and cutting angle in the middle of the PG auxiliary positioning piece 13 can ensure the theoretical installation distance between the Hall element and the magnetic ring, and also allow employees to quickly find the positioning hole 111 when placing it.

[0042] As an optional implementation, the PG board 11 and the high-voltage wiring board are located in different planes.

[0043] The PG board 11 and the high-voltage wiring board 11 are located in different planes, so that a set of injection molds can be used to inject products with multiple core stacking heights.

[0044] As an optional implementation, a plurality of positioning holes 111 are formed on the PG board 11 .

[0045] The plurality of positioning holes 111 facilitates reliable positioning of the PG plate 11 during injection molding.

[0046] As an optional implementation, the PG board 11 and the winding stator 21 are isolated and positioned by a plastic packaging material.

[0047] The PG board 11 is not fixed on the winding stator 21, and is designed to be separated from the high-voltage wiring board, so that the same injection mold can be used to inject products with multiple core stacking heights.

[0048] As an optional implementation, the PG assembly and the stator assembly are integrally injection molded with BMC plastic packaging material.

[0049] Products made of BMC (bulk molding compound) plastic packaging materials have good mechanical properties, high dimensional stability, good surface finish, excellent water resistance, oil resistance, corrosion resistance, heat resistance and excellent electrical properties.

[0050] The present invention provides a motor, comprising any one of the above plastic-encapsulated stators 100 .

[0051] like Figure 8 As shown, the plastic-encapsulated motor includes a plastic-encapsulated stator 100, a rotor assembly 200, a front damping ring 400, a rear damping ring 500, a front end cover 300, etc. The plastic-encapsulated stator 100 is formed by integrally injecting the stator assembly 200 and the BB cover 7 with the BMC plastic encapsulation material 8. The stator assembly 2 includes a winding stator 21, a power supply assembly (including an outlet sheath and a strong wire 4), a PG assembly 1 (including a PG board 11 and a PG wire 12), and a strong power connection board I / II. The PG board 11 and the strong power connection are designed to be separated. The PG board 11 is not fixed on the winding stator 21, see Figure 5 During injection molding, there is an ejector pin designed on the core of the injection mold to position the injection. This design allows the same mold to be used to mold a variety of products with different core stacking solutions, which improves the versatility of the injection mold and reduces the mold investment cost. At the same time, since the final assembly no longer needs to press-fit the PG component 1, the final assembly parts are reduced, the final assembly process is simplified, and fully automated final assembly production can be achieved, which improves production efficiency and product quality consistency.

[0052] The PG board 11 is provided with a plurality of positioning holes 111. The upper mold core 6 and the lower mold core 9 of the injection mold are respectively provided with a plurality of concave ejector pins 61 and convex ejector pins 91 for positioning the PG board 11. The production method of the plastic-encapsulated stator 100 can be as follows: the stator assembly 2 is placed in the lower mold core 9 of the injection mold, the positioning holes 111 of the PG board 11 are simultaneously placed in the convex ejector pins 91 of the lower mold core 9, the BB cover 7 is placed, the mold is closed (the concave ejector pins 61 of the upper mold core 6 are aligned with the convex ejector pins 91 of the lower mold core 9 to complete the positioning of the PG board 11), the BMC plastic encapsulation material 8 is injected, and the plastic-encapsulated stator 100 is as follows. Figure 2 shown.

[0053] A PG auxiliary positioning piece 13 may also be designed, which is first fixed to the PG plate 11 and then used to position the mold.

[0054] The present invention provides an injection mold for injection molding any of the above-mentioned plastic-encapsulated stators 100, including a first mold core and a second mold core, wherein the first mold core has a protrusion adapted to the positioning hole 111, and the second mold core has a groove adapted to the protrusion. Figure 6 .

[0055] The first mold core is aligned with the second mold core through the concave-convex structure.

[0056] As an optional implementation, the first mold core is the lower mold core 9 , and the second mold core is the upper mold core 6 .

[0057] The lower mold core 9 has a convex ejector pin 91 adapted to the positioning hole 111, and the upper mold core 6 has a concave ejector pin 61, which is convenient for alignment injection molding.

[0058] As an optional implementation, the protrusion is a ejector pin.

[0059] The protrusion is an ejector pin, which is convenient for positioning injection molding.

[0060] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A plastic-sealed stator, characterized in that: It comprises a PG component and a stator component, wherein the PG component and the stator component are integrally injection molded; The stator assembly includes a winding stator and a high-voltage wiring board, and the PG assembly and the high-voltage wiring board are separately arranged; The PG assembly includes a PG board and a PG line. The PG board is provided with a positioning hole, and the positioning hole is used to achieve a matching connection with the mold positioning ejector pin; The PG board and the strong current wiring board are located in different planes; The PG assembly also includes a PG auxiliary positioning piece, which is fixed to the PG plate; the PG auxiliary positioning piece is an annular structure, and its inner ring is an arc shape and has a cutting angle.

2. The plastic-encapsulated stator according to claim 1, characterized in that: The PG board is provided with a plurality of positioning holes.

3. The plastic-encapsulated stator according to claim 1, characterized in that: The PG board and the winding stator are isolated and positioned by plastic packaging material.

4. The plastic-encapsulated stator according to claim 1, characterized in that: The PG component and the stator component are integrally injection-molded using BMC plastic packaging material.

5. A motor, characterized in that: It comprises the plastic-encapsulated stator as described in any one of claims 1-4.

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