A stator assembly and a brushless motor

Abstract

This utility model discloses a stator assembly and a brushless motor, relating to the field of motor technology. The assembly includes: a stator core comprising an annular yoke, winding teeth, and a wire-blocking portion, with both ends of the winding teeth connected to the yoke and the wire-blocking portion respectively, forming a winding space between the wire-blocking portion and the yoke; an insulating frame on the stator core, at least partially surrounding the yoke, winding teeth, and wire-blocking portion; a winding wound on the insulating frame, corresponding to the winding teeth and located within the winding space; and a limiting member disposed on the side of the insulating frame away from the stator core, connected to the insulating frame, and at least partially abutting against the winding. This application, by providing a limiting member, can limit the winding during motor operation, effectively reducing the possibility of loosening or displacement of the winding due to mechanical vibration or thermal stress, and reducing faults such as poor contact and short circuits caused by winding position changes.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to a stator assembly and a brushless motor. Background Technology

[0002] Brushless motors have advantages such as high efficiency, long life and low electromagnetic interference, and are widely used in industrial equipment, new energy vehicles and other fields. With the expansion of application scenarios, the requirements for motor performance and stability are becoming increasingly stringent. At present, during the operation of the motor, the coil is prone to displacement due to mechanical vibration and thermal stress, which can cause short circuit faults and affect the normal operation of the brushless motor. To solve the short circuit problem, glue or braided wire is usually used to manually fix the coil. These methods increase production steps and costs and increase process complexity. Utility Model Content

[0003] In order to reduce the displacement of the coil during motor operation and reduce the complexity of the motor manufacturing process, this application provides a stator assembly and a brushless motor.

[0004] A stator assembly includes a stator core, the stator core comprising an annular yoke, a winding tooth portion, and a wire-blocking portion, the two ends of the winding tooth portion being connected to the yoke and the wire-blocking portion respectively, and a winding space being formed between the wire-blocking portion and the yoke; an insulating frame, the stator core being provided with the insulating frame, the insulating frame at least partially surrounding the yoke, the winding tooth portion, and the wire-blocking portion; a winding, the winding being wound on the insulating frame, the winding being correspondingly disposed with respect to the winding tooth portion and located at the winding space; and a limiting member, the limiting member being disposed on the side of the insulating frame away from the stator core, the limiting member being connected to the insulating frame, and the limiting member at least partially abutting against the winding.

[0005] By adopting the above technical solution, the winding is wound on the insulating frame and located at the winding teeth. The wire-blocking part blocks the winding, and a winding space is formed between the wire-blocking part and the yoke. The winding has a fixed winding space, making the magnetic field distribution more uniform and reasonable. The insulating frame is set between the stator core and the winding, forming reliable insulation protection, which can block the current from being conducted through the stator core and avoid leakage current hazards. The limiting component is connected to the insulating frame and abuts against the winding. The limiting component can limit the winding when the motor is running, effectively reducing the loosening or displacement of the winding due to mechanical vibration or thermal stress, reducing the occurrence of faults such as poor contact and short circuits caused by winding position changes, ensuring the stability of the stator assembly, and reducing the risk of motor failure. At the same time, the limiting component can be directly connected to the insulating frame. The limiting component can play a limiting role without the need for binding and fixing the winding with glue or other additional fixing operations, reducing the complexity of the production process.

[0006] Optionally, the insulating skeleton includes a skeleton body and an extension, the skeleton body at least partially surrounds the yoke, the extension at least partially surrounds the wire-blocking portion, the extension extends axially to the outside of the wire-blocking portion, and the limiting member is connected to the extension.

[0007] By adopting the above technical solution, the design of the extension on the insulating frame further expands the coverage of the insulating frame over the stator core, provides a more comprehensive wrapping of the wire blocking part, and provides a connection position for the limiting component, so that the limiting component can be more firmly installed on the insulating frame, thereby improving the overall reliability of the structure.

[0008] Optionally, the extension includes at least two extension pieces, with a groove formed between two adjacent extension pieces, and the limiting member has a protrusion that mates with the groove.

[0009] By adopting the above technical solution, the grooves formed between the extension pieces and the protrusions on the limiting parts cooperate with each other, making the connection between the limiting parts and the extension parts tighter and more secure. Under the complex operating conditions of the motor, it can effectively prevent the limiting parts from loosening or shifting, ensuring the accuracy and continuity of its winding limiting. In addition, this cooperation method is also convenient for positioning and disassembly during assembly, improving the convenience of production and maintenance.

[0010] Optionally, the insulating frame further includes a connecting portion, the two ends of which are connected to the frame body and the extension portion respectively. The connecting portion at least partially surrounds the winding teeth portion, and a guide groove is provided on the connecting portion, and the winding is wound on the guide groove.

[0011] By adopting the above technical solution, the guide groove opened on the connection part provides guidance for the winding, so that the winding can be wound more neatly and in a more standardized manner on the insulating frame, which improves the efficiency and quality of winding and enhances the consistency and stability of the electromagnetic performance of the stator assembly.

[0012] Optionally, the stator core is provided with a positioning hole, and the insulating frame is provided with a positioning pin on the side near the stator core, the positioning pin being configured to cooperate with the positioning hole.

[0013] By adopting the above technical solution, the positioning pins of the insulating frame and the positioning holes of the stator core cooperate to achieve the positioning and accurate installation of the insulating frame on the stator core.

[0014] Optionally, the insulating frame is provided with insulating terminals, and the winding is provided with at least two, and the windings are electrically connected to each other through the insulating terminals.

[0015] By adopting the above technical solution, the insulating terminals set on the insulating frame provide a channel for electrical connection between multiple windings. While ensuring that the current can be conducted normally, it prevents electrical faults such as short circuits caused by direct contact between windings. At the same time, it facilitates the wiring operation of the windings during the production process, which helps to improve production efficiency.

[0016] Optionally, two insulating frames are arranged opposite each other on both sides of the stator core, and the two insulating frames are detachably connected.

[0017] By adopting the above technical solution, the stator core is provided with detachable insulating frames on both sides of the axial direction, which facilitates step-by-step assembly during the production assembly stage, reduces assembly difficulty, and improves production efficiency.

[0018] Optionally, it also includes a fixing block, on which a mounting hole is formed through, the stator core is disposed in the mounting hole, a connecting groove is formed on the outer wall of the yoke, and a connecting block that mates with the connecting groove is provided on the inner wall of the mounting hole.

[0019] By adopting the above technical solution, the fixing block provides additional support for the stator core. Through the cooperation of the connecting slot and the connecting block, the rotation and displacement of the stator core in the mounting hole are restricted, ensuring the relative stability between the components of the stator assembly when the motor is running.

[0020] Optionally, the yoke is composed of several iron core blocks connected in a ring, and each iron core block is provided with the winding teeth.

[0021] By adopting the above technical solution, the yoke is composed of several iron core blocks connected in a ring. Each iron core block is equipped with winding teeth, which facilitates the modular design of the stator assembly and makes the winding operation easier. At the same time, the number and specifications of the iron core blocks can be adjusted according to actual production needs, which facilitates processing and manufacturing.

[0022] On the other hand, this application discloses a brushless motor, including the stator assembly described in any of the foregoing claims.

[0023] By adopting the above technical solution, the brushless motor has good electrical insulation performance, stable winding limit and precise component positioning, which enables the brushless motor to output stable power during operation, has high reliability and durability, reduces the probability of failure, extends service life, and has a simple structure, reduces the number of processes in the production process and improves production efficiency.

[0024] In summary, this application includes at least one of the following beneficial effects:

[0025] 1. The stator assembly uses limiting components to limit the windings, thereby reducing the possibility of short circuits caused by winding displacement during motor operation and improving the stability of the stator assembly.

[0026] 2. The limiting component is directly connected to the extension of the insulating frame, and the two insulating frames are detachably connected, which facilitates the assembly of the stator assembly during the production stage, reduces the difficulty of downsizing, and improves production efficiency.

[0027] 3. The guide grooves on the connection part provide guidance for the winding, so that the winding can be wound more neatly and in a more standardized manner on the insulating frame, thereby improving the efficiency and quality of winding. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the stator assembly in an embodiment of this application.

[0029] Figure 2 This is an exploded view of the stator assembly in an embodiment of this application.

[0030] Figure 3 This is a top view of the stator core in an embodiment of this application.

[0031] Figure 4 This is a schematic diagram of the stator core structure in an embodiment of this application.

[0032] Figure 5 This is a schematic diagram of the structure of the fixing block in an embodiment of this application.

[0033] Figure 6 This is a schematic diagram of the insulating skeleton in an embodiment of this application.

[0034] Figure 7 This is a schematic diagram of the connection between the stator core, insulating frame, and windings in the embodiments of this application.

[0035] Figure 8 This is a schematic diagram of the insulating skeleton in an embodiment of this application.

[0036] Figure 9 This is a schematic diagram of the structure of the limiting member in the embodiments of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Stator core; 11. Yoke; 1101. Connecting groove; 111. Core block; 12. Winding teeth; 13. Wire blocking part; 101. Winding space; 102. Positioning hole;

[0039] 2. Insulating frame; 21. Frame body; 22. Extension; 221. Extension piece; 2201. Groove; 23. Connecting part; 2301. Guide groove; 24. Positioning pin; 25. Insulating terminal;

[0040] 3. Windings;

[0041] 4. Limiting component; 41. Protrusion;

[0042] 5. Fixing block; 501. Mounting hole; 51. Connecting block. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0044] This application discloses a stator assembly. (Refer to...) Figure 1 and 2 The stator assembly includes a stator core 1, an insulating frame 2 covering the stator core 1, a winding 3 wound on the insulating frame 2, and a limiting member 4 connected to the insulating frame 2. The stator core 1 consists of a yoke 11, a winding tooth 12, and a wire-blocking part 13. The two ends of the winding tooth 12 are connected to the yoke 11 and the wire-blocking part 13 respectively. A winding space 101 is formed between the wire-blocking part 13 and the yoke 11. The winding 3 is disposed within the winding space 101 and wound on the winding tooth 12. The insulating frame 2 is located between the winding 3 and the stator core 1, and covers the yoke 11, the winding tooth 12, and the wire-blocking part 13. The limiting member 4 is connected to the insulating frame 2 and simultaneously abuts against the winding 3. The insulating frame 2 serves to block current from passing through the stator core 1. The limiting member 4 is connected to the insulating frame 2 and partially abuts against the winding 3, restricting the winding 3 to the position of the winding space 101 and limiting the axial displacement of the winding 3.

[0045] Reference Figure 3 and 4 The yoke 11 includes multiple identical iron core blocks 111 connected in a ring. Each iron core block 111 is provided with a winding tooth 12, and the other end of the winding tooth 12 is provided with a wire stop 13, which facilitates the winding operation of a single iron core block 111. The iron core blocks 111 of the wound coil can be assembled together. This modular design makes it easy to adjust the number and specifications of the iron core blocks in actual production. At the same time, the windings 3 will not interfere with each other during winding, which can improve production efficiency.

[0046] Reference Figure 4 and 5 The stator assembly includes a fixing block 5 with a mounting hole 501. The stator core 1 is embedded in the mounting hole 501. A connecting block 51 protrudes from the inner wall of the mounting hole, and a connecting groove 1101 that mates with the connecting block 51 is recessed on the outer wall of the yoke 11 of the stator core 1. The connecting groove 1101 and the connecting block 51 prevent the stator core 1 from rotating relative to the fixing block 5. The fixing block 5 facilitates the assembly of the stator assembly with other components of the motor.

[0047] Reference Figure 4 and 6 The stator core 1 has a positioning hole 102, and the insulating frame 2 has a positioning pin 24 that mates with the positioning hole 102. When the insulating frame 2 is installed on the stator core 1, the positioning pin 24 is located inside the positioning hole 102. The engagement of the positioning pin 24 with the positioning hole 102 plays a positioning role when the insulating frame 2 is installed on the stator core 1, preventing the insulating frame 2 from shifting relative to the stator core 1 and improving the overall stability of the stator assembly.

[0048] Reference Figure 7 and 8 The insulating frame 2 includes a frame body 21 and an extension 22. The frame body 21 covers the yoke 11, and the extension 22 covers the wire-blocking portion 13. The extension 22 extends axially and extends beyond the wire-blocking portion 13. The limiting member 4 is connected to the extension 22. The extension 22 covers the wire-blocking portion 13 and extends beyond it to prevent leakage from contact between the winding 3 and the wire-blocking portion 13. The extended portion of the extension 22 connects to the limiting member 4, providing a connection support point for the limiting member 4.

[0049] Reference Figure 8 and 9 The extension 22 includes two extension pieces 221, and a groove 2201 is formed between the two extension pieces 221. The protrusion 41 on the limiting member 4 is disposed in the groove 2201. The cooperation between the groove 2201 and the protrusion 41 prevents the limiting member 4 from being displaced relative to the insulating frame 2, making the limiting member 4 more firmly installed on the insulating frame 2.

[0050] Of course, in other embodiments of this application, the extension 22 may also include more than two extension pieces 221, with a groove 2201 formed between two adjacent extension pieces 221, and the limiting member 4 is provided with a protrusion 41 corresponding to the groove 2201.

[0051] Reference Figure 7 and 8 The insulating frame 2 also includes a connecting portion 23, which covers the winding tooth portion 12. Both ends of the connecting portion 23 are connected to the frame body 21 and the extension portion 22. A guide groove 2301 is parallel to the surface of the connecting portion 23, and the winding 3 is wound on the guide groove 2301. The guide groove 2301 provides a winding path for the winding 3, allowing the coil to wind along with the guide groove 2301 at the beginning of winding, ensuring the winding is neatly and orderly wound on the insulating frame 2. This improves the quality of the winding 3 and can enhance the consistency and stability of the electromagnetic performance of the stator assembly to a certain extent.

[0052] Reference Figure 8Insulating terminals 25 are provided on the insulating frame 2. The wires that make electrical connections between the windings 3 can be wound around the insulating terminals 25 to fix the wires and prevent electrical faults caused by contact between the wires and the windings 3 or between multiple windings 3. At the same time, it facilitates the wiring operation of the windings 3 during the production process, which helps to improve production efficiency.

[0053] Reference Figure 2 There are two insulating frames 2, which are arranged mirror images of each other on both sides of the stator core 1 and are detachably connected. Specifically, the two insulating frames 2 can be connected by screws or clips.

[0054] This application also discloses a brushless motor, including the stator assembly described above.

[0055] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A stator assembly, characterized in that, include: Stator core (1), the stator core (1) includes an annular yoke (11), a winding tooth (12) and a wire-blocking part (13), the two ends of the winding tooth (12) are respectively connected to the yoke (11) and the wire-blocking part (13), and a winding space (101) is formed between the wire-blocking part (13) and the yoke (11). An insulating frame (2) is provided on the stator core (1), and the insulating frame (2) at least partially surrounds the yoke (11), the winding tooth (12) and the wire blocking part (13). The winding (3) is wound on the insulating frame (2), and the winding (3) is correspondingly arranged with the winding teeth (12) and located in the winding space (101); The limiting member (4) is disposed on the side of the insulating frame (2) away from the stator core (1), the limiting member (4) is connected to the insulating frame (2), and the limiting member (4) at least partially abuts against the winding (3).

2. A stator assembly according to claim 1, characterized in that: The insulating skeleton (2) includes a skeleton body (21) and an extension (22). The skeleton body (21) at least partially surrounds the yoke (11), and the extension (22) at least partially surrounds the wire-blocking part (13). The extension (22) extends axially to the outside of the wire-blocking part (13), and the limiting member (4) is connected to the extension (22).

3. A stator assembly according to claim 2, characterized in that: The extension (22) includes at least two extension pieces (221), a groove (2201) is formed between two adjacent extension pieces (221), and the limiting member (4) is provided with a protrusion (41) that cooperates with the groove (2201).

4. The stator assembly according to claim 2, characterized in that, The insulating frame (2) also includes a connecting part (23), the two ends of which are connected to the frame body (21) and the extension part (22) respectively. The connecting part (23) at least partially surrounds the winding tooth part (12). A guide groove (2301) is provided on the connecting part (23), and the winding (3) is wound on the guide groove (2301).

5. A stator assembly according to claim 1, characterized in that, The stator core (1) has a positioning hole (102), and the insulating frame (2) has a positioning pin (24) on the side near the stator core (1). The positioning pin (24) is configured to cooperate with the positioning hole (102).

6. A stator assembly according to claim 1, characterized in that, The insulating frame (2) is provided with insulating terminals (25), and the winding (3) is provided with at least two windings, which are electrically connected to each other through the insulating terminals (25).

7. A stator assembly according to claim 1, characterized in that, The stator core (1) has two insulating frames (2) arranged opposite each other on both sides of the axial direction, and the two insulating frames (2) are detachably connected.

8. A stator assembly according to claim 1, characterized in that, It also includes a fixing block (5), on which a mounting hole (501) is provided, the stator core (1) is disposed in the mounting hole (501), the outer wall of the yoke (11) is provided with a connecting groove (1101), and the inner wall of the mounting hole (501) is provided with a connecting block (51) that cooperates with the connecting groove (1101).

9. A stator assembly according to claim 1, characterized in that, The yoke (11) is composed of several iron core blocks (111) connected in a ring, and each iron core block (111) is provided with the winding teeth (12).

10. A brushless motor, characterized in that, The brushless motor includes the stator assembly as described in any one of claims 1 to 9.

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