High-performance plastic package brushless direct current motor structure

Abstract

The utility model provides a high-performance plastic package brushless direct current motor structure, belongs to the technical field of direct current motors, and aims to solve the problems that the conventional bracket has poor sealing performance on parts such as an internal rotor and the like, and the parts are easily influenced by the external environment, so that the performance of a motor is unstable and the service life of the motor is prolonged. The motor plastic package frame comprises a support, and the support is composed of a plastic package frame base, a plastic package iron core boss, a contact pin, an iron core assembly, a silicon steel sheet lamination, an iron core upper plastic package mold and an iron core lower plastic package mold. According to the utility model, the support is made of a high-performance insulating material, an integrated injection molding technology is adopted, the protection performance of the motor can be enhanced, the iron core assembly, the coil winding and the contact pin are located in the support, the working stability can be improved, the optimized plastic packaging technology can reduce the stress generated in the plastic packaging process, the deformation or damage of the internal assembly is avoided, and the service life of the motor is prolonged. The perfect packaging of the motor assembly is realized, and the thermal performance and the mechanical strength of the motor are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of DC motors, and more specifically, relates to a high-performance plastic-sealed brushless DC motor structure. Background Art

[0002] As a high-performance motor, the plastic-encapsulated brushless DC motor has the advantages of strong environmental adaptability, low maintenance cost, and good thermal management performance in actual work. With the continuous changes in the use environment and the continuous improvement of use reliability, the requirements for brushless DC motors are also constantly increasing; first of all, the market scale continues to expand, and the demand for high-performance brushless DC motors is also constantly increasing, so plastic-encapsulated brushless DC motors have ample development space in the future market.

[0003] However, the current plastic-encapsulated brushless DC motor has poor sealing performance on the internal rotor and other parts due to the bracket, resulting in weak protection for internal parts. The parts are easily affected by the external environment, resulting in unstable performance of the motor, and it is inconvenient for workers to disassemble and maintain the motor. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a high-performance plastic-encapsulated brushless DC motor structure to solve the problems that the existing bracket has poor sealing performance on internal rotors and other parts, the parts are easily affected by the external environment, resulting in unstable motor performance, and inconvenience for workers when disassembling and maintaining the motor.

[0005] The purpose and effect of the utility model of a high-performance plastic-encapsulated brushless DC motor structure are achieved by the following specific technical means: a high-performance plastic-encapsulated brushless DC motor structure, including a bracket;

[0006] The bracket is composed of a plastic-sealed frame base, a plastic-sealed iron core boss, pins, an iron core assembly, silicon steel sheet laminations, an upper iron core plastic-sealed mold, and a lower iron core plastic-sealed mold;

[0007] The rotor includes a housing and a magnetic ring. The magnetic ring is located inside the housing. The rotor and the bracket are assembled together through a bearing connecting shaft.

[0008] A bearing connecting shaft, the bearing connecting shaft being located inside the rotor, and a retaining spring being fixedly mounted on the surface of the bearing connecting shaft;

[0009] A PCB drive control board is provided with a second connection hole in the middle of the surface of the PCB drive control board, and a first connection hole is also provided on the surface of the PCB drive control board.

[0010] The end cover is provided with a support column for fixing the PCB drive control board, and the plastic-sealed iron core boss is provided with a bearing seat and a through hole communicating with the base of the plastic-sealed frame;

[0011] A wire clamping slot, the wire clamping slot comprising a first clamping slot and a second clamping slot;

[0012] The plastic packaging frame base has a mounting groove on its surface that matches the size of the PCB drive control board, and the plastic packaging iron core boss is plastic-sealed to wrap the stator iron core.

[0013] Furthermore, the base of the plastic packaging frame is provided with a groove having a size matching that of the PCB drive control board, and the base of the plastic packaging frame is provided with a motor mounting hole and an end cover mounting hole.

[0014] Furthermore, the core assembly is composed of silicon steel sheet laminations, an upper core plastic sealing mold, and a lower core plastic sealing mold.

[0015] Furthermore, the pin is led out from the corresponding outlet position of the iron core coil winding wrapped by the plastic-encapsulated iron core boss to the outside of the plastic-encapsulated frame base, and the pin is clamped in the first connection hole on the surface of the PCB drive control board.

[0016] Furthermore, the end cover is provided with a support column for fixing the PCB drive control board, and the upper end of the end cover is also provided with a column that matches the mounting hole of the plastic packaging frame base.

[0017] Furthermore, both ends of the wiring harness are respectively clamped between the first clamping slot and the second clamping slot.

[0018] Furthermore, the plastic packaging frame base is provided with a step fixedly matched with the end cover, the plastic packaging frame base is provided with a bearing seat, and the plastic packaging iron core boss is provided with a bearing seat and a through hole communicating with the plastic packaging frame base.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the present invention, the bracket is made of high-performance insulating material and adopts an integrated injection molding process, which can enhance the protection performance of the motor. The iron core assembly, coil winding and pins are located inside the bracket, which can improve working stability and extend service life. The optimized plastic sealing process can reduce the stress generated during the plastic sealing process, avoid deformation or damage of internal components, achieve perfect packaging of the motor components, and ensure the thermal performance and mechanical strength of the motor.

[0021] In addition, the plastic-encapsulated brushless DC motor has a simple structure and is easy to use. The bracket and the rotor are connected to the bearing and the bearing connecting shaft respectively. The stator is plastic-encapsulated inside the bracket, and the PCB drive control board is plastic-encapsulated and wrapped inside the base of the plastic-encapsulated frame, which greatly improves environmental adaptability. In addition, the PCB drive control board is plastic-encapsulated in the bracket, isolating it from the external environment, making it less prone to damage, reducing the maintenance rate, and significantly improving the stability of motor performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a schematic diagram of the exploded structure of a plastic-encapsulated brushless DC motor.

[0023] Figure 2 This is a schematic diagram of the overall decomposition structure of the bracket of the utility model.

[0024] Figure 3 It is a schematic diagram of the iron core structure of the utility model.

[0025] Figure 4 This is a schematic diagram of the structure of the PCB drive control board of the utility model.

[0026] In the figure, the corresponding relationship between the component names and the drawing numbers is as follows:

[0027] 1. Bracket; 11. Plastic-encapsulated frame base; 12. Plastic-encapsulated iron core boss; 13. Pin; 14. Iron core assembly; 141. Silicon steel sheet laminations; 142. Upper plastic-encapsulated iron core mold; 143. Lower plastic-encapsulated iron core mold; 2. Rotor; 21. Casing; 22. Magnetic ring; 3. Bearing connecting shaft; 31. Retaining spring; 4. PCB drive control board; 41. First connecting hole; 42. Second connecting hole; 5. End cover; 6. Wiring harness; 7. Wire slot; 71. First slot; 72. Second slot. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. Example 1:

[0029] As attached Figure 1 To the attached Figure 4 As shown:

[0030] The utility model provides a high-performance plastic-encapsulated brushless DC motor structure, comprising a bracket 1;

[0031] The bracket 1 is composed of a plastic-encapsulated frame base 11, a plastic-encapsulated iron core boss 12, pins 13, an iron core assembly 14, silicon steel sheet laminations 141, an iron core upper plastic-encapsulated mold 142, and an iron core lower plastic-encapsulated mold 143;

[0032] The rotor 2 includes a housing 21 and a magnetic ring 22. The magnetic ring 22 is located inside the housing 21. The rotor 2 and the bracket 1 are assembled together through a bearing connecting shaft 3. The housing 21 and the magnetic ring 22 are riveted together to form the rotor 2. The structure is simple and clear, and the rotor 2 is easy to disassemble and replace.

[0033] The bearing connecting shaft 3 is located inside the rotor 2. A retaining spring 31 is fixedly mounted on the surface of the bearing connecting shaft 3 to facilitate positioning and loosening under different requirements.

[0034] The PCB drive control board 4 has a second connection hole 42 in the middle of its surface, and a first connection hole 41 in its surface.

[0035] The end cover 5 is provided with a support column for fixing the PCB drive control board 4, and the plastic-encapsulated iron core boss 12 is provided with a bearing seat and a through hole communicating with the plastic-encapsulated frame base 11;

[0036] The wire clamping slot 7 includes a first clamping slot 71 and a second clamping slot 72;

[0037] The plastic-encapsulated frame base 11 has a mounting groove on its surface that matches the size of the PCB drive control board 4 , and the plastic-encapsulated iron core boss 12 is plastic-encapsulated to wrap the stator iron core.

[0038] The plastic packaging frame base 11 is provided with a groove having a size matching that of the PCB drive control board 4 , and the plastic packaging frame base 11 is provided with a motor mounting hole and an end cover 5 mounting hole.

[0039] The core assembly 14 is composed of a silicon steel sheet stack 141 , an upper core plastic mold 142 and a lower core plastic mold 143 . The structural structure is more conducive to maintenance and installation as well as insulation of the core assembly 14 .

[0040] Among them, the pin 13 is led out from the corresponding outlet position of the iron core coil winding wrapped by the plastic-encapsulated iron core boss 12 to the outside of the plastic-encapsulated frame base 11, and the pin 13 is clamped in the first connecting hole 41 on the surface of the PCB drive control board 4. After the worker takes out the pin 13, it is convenient to disassemble, assemble and replace the PCB drive control board 4.

[0041] The end cover 5 is provided with an abutment column for fixing the PCB drive control board 4 , and the upper end of the end cover 5 is also provided with a column that matches the mounting hole of the plastic packaging frame base 11 .

[0042] The two ends of the wire harness 6 are respectively clamped between the first clamping slot 71 and the second clamping slot 72 , so as to facilitate the fixation of the wire harness 6 .

[0043] Among them, the plastic packaging frame base 11 is provided with a step that is fixedly matched with the end cover 5, the plastic packaging frame base 11 is provided with a bearing seat, and the plastic packaging core boss 12 is provided with a bearing seat and a through hole communicating with the plastic packaging frame base 11, which can facilitate the disassembly and assembly of workers, and maintenance is more convenient, and glue can be used to enhance the installation tightness of the end cover 5 and the plastic packaging frame base 11.

[0044] The specific usage and function of this embodiment are as follows:

[0045] In the present invention, the bracket 1 is made of high-performance insulating material and adopts an integrated injection molding process, which can enhance the protection performance of the motor. The iron core component 14, coil winding and pin 13 are located inside the bracket 1, which can improve the working stability and extend the service life. The optimized plastic packaging process can reduce the stress generated during the plastic packaging process, avoid deformation or damage of internal components, achieve perfect packaging of motor components, and ensure the thermal performance and mechanical strength of the motor. At the same time, the plastic-sealed brushless DC motor has a simple structure and is easy to use. The bracket 1 and the rotor 2 are respectively connected to the bearing and the bearing connecting shaft 3 through bearings. The stator is plastic-sealed inside the bracket 1, and the PCB drive control board 4 is plastic-sealed and wrapped inside the plastic packaging frame base 11, which greatly improves the environmental adaptability. In addition, the PCB drive control board 4 is plastic-sealed in the bracket 1, which is isolated from the external environment, is not easy to be damaged, has a reduced maintenance rate, and significantly improves the performance stability of the motor.

Claims

1. A high-performance plastic-encapsulated brushless DC motor structure, characterized by: The invention comprises a bracket (1), the bracket (1) is composed of a plastic-sealed frame base (11), a plastic-sealed iron core boss (12), a pin (13), an iron core assembly (14), a silicon steel sheet lamination (141), an iron core upper plastic-sealed mold (142), and an iron core lower plastic-sealed mold (143); a rotor (2), the rotor (2) comprising a housing (21) and a magnetic ring (22), the magnetic ring (22) being located inside the housing (21), the rotor (2) and the bracket (1) being assembled together through a bearing connecting shaft (3); a bearing connecting shaft (3), the bearing connecting shaft (3) being located inside the rotor (2), the bearing connecting shaft The surface of the (3) is fixedly mounted with a retaining spring (31); a PCB drive control board (4), wherein a second connection hole (42) is provided in the middle of the surface of the PCB drive control board (4), and a first connection hole (41) is also provided on the surface of the PCB drive control board (4); an end cover (5), wherein the end cover (5) is provided with a support column for fixing the PCB drive control board (4), and the plastic-sealed iron core boss (12) is provided with a bearing seat and a through hole communicating with the plastic-sealed frame base (11); a wire clamping slot (7), wherein the wire clamping slot (7) includes a first clamping slot (71) and a second clamping slot (72); a wiring harness (6), wherein both ends of the wiring harness (6) are respectively clamped between the first clamping slot (71) and the second clamping slot (72); and a plastic-sealed frame base (11), wherein a mounting slot matching the size of the PCB drive control board (4) is provided on the surface of the plastic-sealed frame base (11), and the plastic-sealed iron core boss (12) is plastic-sealed with a stator iron core.

2. A high-performance plastic-encapsulated brushless DC motor structure as claimed in claim 1, characterized in that: The plastic packaging frame base (11) is provided with a groove having a size matching that of the PCB drive control board (4) for installation, and the plastic packaging frame base (11) is provided with a motor installation hole and an end cover (5) installation hole.

3. A high-performance plastic-encapsulated brushless DC motor structure as claimed in claim 1, characterized in that: The iron core assembly (14) is composed of a silicon steel sheet lamination (141), an upper iron core plastic sealing mold (142), and a lower iron core plastic sealing mold (143).

4. A high-performance plastic-encapsulated brushless DC motor structure as claimed in claim 1, characterized in that: The pin (13) is led out of the plastic package frame base (11) from the corresponding outlet position of the iron core coil winding wrapped by the plastic package iron core boss (12), and the pin (13) is clamped in the first connection hole (41) on the surface of the PCB drive control board (4).

5. A high-performance plastic-encapsulated brushless DC motor structure as claimed in claim 1, characterized in that: The end cover (5) is provided with a support column for fixing the PCB drive control board (4), and the upper end of the end cover (5) is also provided with a column body that matches the installation hole of the plastic packaging frame base (11).

6. A high-performance plastic-encapsulated brushless DC motor structure as claimed in claim 1, characterized in that: The plastic packaging frame base (11) is provided with a step fixedly matched with the end cover (5), the plastic packaging frame base (11) is provided with a bearing seat, and the plastic packaging iron core boss (12) is provided with a bearing seat and a through hole communicating with the plastic packaging frame base (11).

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