Motor stator insulating frame

Abstract

This application relates to a motor stator insulation frame, primarily concerning the technical field of motor components. It includes an upper frame and a lower frame. The upper frame includes an upper cover and first isolation grooves spaced apart circumferentially along the upper cover. When the upper frame is fixed to the upper part of the motor stator, the first isolation grooves fit snugly against the stator slots. The lower frame includes a lower cover and second isolation grooves spaced apart circumferentially along the lower cover. When the lower frame is fixed to the lower part of the motor stator, the second isolation grooves fit snugly against the stator slots. The end of the first isolation groove furthest from the upper cover and the end of the second isolation groove furthest from the lower cover seamlessly abut against each other, forming an isolation cavity that fits snugly against the stator slots. This application solves the problem in traditional motor stator insulation frames that use insulating cover plates installed at both ends and inserting insulating paper into the stator slots for stator insulation. In these methods, the upper and lower cover plates cannot be precisely positioned, easily leading to misalignment with the core slots and affecting the stator insulation effect.

Description

Technical Field

[0001] This application relates to the technical field of motor components, and in particular to a motor stator insulation frame. Background Technology

[0002] In the field of motor manufacturing, the insulation treatment of the stator core is crucial, directly affecting the motor's performance and service life. With the continuous development of motor technology, the requirements for stator core insulation are also increasing. Both small and large stator cores are widely used in motors, and different sizes of cores have different insulation requirements. Good stator core insulation can effectively improve the stability and safety of the motor, reduce the probability of failure, and thus promote the efficient application of motors in various industrial equipment and household appliances.

[0003] For stator core insulation in centralized windings, different methods are used when handling cores of different sizes. For small cores, a single-piece plastic coating is often used, where the core and insulation are formed into a single unit through injection molding. This method utilizes injection molding technology to tightly wrap the insulation material around the core, achieving good insulation performance. However, for large cores, due to current limitations in injection molding technology, single-piece injection molding cannot be used. The common practice is to install insulating cover plates at both ends of the core and insert insulating paper into the stator slots to achieve stator insulation. However, the upper and lower cover plates of the insulating frame cannot be precisely positioned, easily leading to misalignment with the core slots. Moreover, the insulating paper is prone to deformation and warping during winding, resulting in inadequate protection of the stator winding insulation, which can lead to substandard withstand voltage insulation or winding damage. On the other hand, using ropes to bind the leads and cross-wires is time-consuming and labor-intensive, hindering production efficiency.

[0004] For stator core insulation in centralized windings, small-sized cores are integrally encapsulated with plastic, molding the core and insulation into a single unit. However, for large-sized cores, integral molding is not feasible due to current limitations in injection molding technology. A common approach is to install insulating cover plates at both ends of the core and insert insulating paper into the stator slots to achieve stator insulation. This method results in misalignment of the upper and lower cover plates of the insulation frame with the core slots, and deformation and warping of the insulating paper during winding, failing to adequately protect the stator winding insulation. This can lead to substandard withstand voltage insulation or winding damage. Furthermore, the leads and cross-wires are tied with ropes, which is time-consuming and labor-intensive. Summary of the Invention

[0005] To address the problem that in traditional motor stator insulation frames, which use insulating cover plates at both ends and insert insulating paper into the stator slots for insulation, the upper and lower cover plates cannot be precisely positioned and are prone to misalignment with the iron core slots, thus affecting the stator insulation effect.

[0006] This application provides a motor stator insulation frame, which adopts the following technical solution:

[0007] An insulating frame for a motor stator includes an upper frame and a lower frame. The upper frame includes an upper cover and first isolation grooves spaced apart circumferentially along the upper cover. When the upper frame is fixed to the upper part of the motor stator, the first isolation grooves fit into the stator grooves. The lower frame includes a lower cover and second isolation grooves spaced apart circumferentially along the lower cover. When the lower frame is fixed to the lower part of the motor stator, the second isolation grooves fit into the stator grooves. The end of the first isolation groove away from the upper cover and the end of the second isolation groove away from the lower cover are seamlessly connected to form an isolation cavity that fits into the stator groove.

[0008] By adopting the above technical solution, the upper and lower skeletons are fixed to the upper and lower parts of the motor stator, respectively. The first and second isolation slots are fitted and seamlessly connected with the stator slots to form an isolation cavity. This can solve the problems of the upper and lower cover plates of the insulation skeleton not being able to be positioned and being easily misaligned with the iron core slots in the existing insulation method. It can also prevent the insulation paper from deforming and warping during the winding process, better protect the stator winding insulation, and prevent the withstand voltage insulation from being substandard or the winding from being damaged.

[0009] Preferably, the upper cover includes an upper support ring and an upper insulating wing fixed to the outer edge of the upper support ring, which coincides with the end of the stator tooth. The lower cover includes a lower support ring and a lower insulating wing fixed to the outer edge of the lower support ring, which coincides with the end of the stator tooth. The first isolation groove is fixedly installed between any two upper insulating wings of the upper cover, and the second isolation groove is fixedly installed between any two insulating wings of the lower cover. The upper and lower insulating wings between the adjacent sidewalls of any two adjacent isolation cavities and the corresponding sidewalls cooperate to form a receiving cavity for the stator tooth.

[0010] By adopting the above technical solution, the outer edge of the upper support ring of the upper cover is provided with an upper insulating wing that matches the end of the stator teeth, and the outer edge of the lower support ring of the lower cover is provided with a lower insulating wing that matches the end of the stator teeth. Furthermore, a first isolation groove is installed between any two upper insulating wings, and a second isolation groove is installed between any two lower insulating wings. This allows the adjacent sidewalls of any two adjacent isolation cavities to cooperate with the upper and lower insulating wings between their corresponding sidewalls to form a receiving cavity for the stator teeth. During motor stator assembly, the stator teeth can be precisely placed within this receiving cavity, ensuring accurate installation of the insulation frame and the stator. This avoids the misalignment of the upper and lower cover plates of the insulation frame with the core slots, which is common in traditional methods. This effectively improves the insulation protection effect of the stator windings, reduces the occurrence of substandard withstand voltage insulation or winding damage, and thus enhances the stability and safety of the motor, reducing the probability of failure.

[0011] Preferably, a winding stop block is fixedly installed on the upper surface of the upper insulating wing near the upper support ring.

[0012] By adopting the above technical solution, after the winding is completed, the end is located at the top cover. A winding stop block is installed on the upper surface of the upper insulating wing near the upper support ring, which can prevent the winding from shifting and better protect the insulation of the stator winding.

[0013] Preferably, a positioning block is fixedly installed on the upper part of the outer wall of the upper support ring.

[0014] By adopting the above technical solution, windings with the same phase need to be fixed together by the upper support ring. Therefore, the setting of the positioning block can prevent the windings from exceeding the height of the upper support ring.

[0015] Preferably, a limiting block is fixedly installed on the lower surface of the lower insulating wing on the side away from the lower support ring.

[0016] By adopting the above technical solution, the fixed installation of a limiting block on the side of the lower insulating wing away from the lower support ring helps to limit the winding and prevent the winding wire from exceeding the insulating frame when winding. The limiting block can also support the insulating frame and prevent the lower support ring from being damaged by pressure.

[0017] Preferably, a terminal block is fixedly installed on the edge of the insulating wing of the upper frame, and a copper wire is fixedly inserted into the terminal block.

[0018] By adopting the above technical solution, the wiring terminals and copper connecting plates facilitate the wiring operation of the motor stator, making the electrical connection of the motor more stable and reliable, and improving the safety and maintainability of the motor.

[0019] Preferably, the first cavity has a first engaging platform at the end away from the upper cover, and the second cavity has a second engaging platform at the end away from the lower cover that matches the first engaging platform.

[0020] By adopting the above technical solution, when the upper frame and the lower frame are engaged, the first isolation groove and the second isolation groove can be accurately positioned and seamlessly connected by the first locking platform and the second locking platform, avoiding misalignment with the iron core groove, ensuring the complete formation of the isolation cavity, achieving good insulation effect, and preventing problems such as unqualified withstand voltage insulation or winding damage.

[0021] Preferably, the upper surface of the upper insulating wing is provided with a first reinforcing rib, and the bottom of the first isolation groove is provided with a second reinforcing rib, and the surfaces of the first reinforcing rib and the second reinforcing rib are both arc-shaped.

[0022] By adopting the above technical solution, a first reinforcing rib is provided on the upper surface of the upper insulating wing of the motor stator insulation frame, and a second reinforcing rib is provided at the bottom of the first isolation groove. The surfaces of both are arc-shaped, which can enhance the structural strength of the upper insulating wing and the first isolation groove. At the same time, the arc-shaped surface can reduce wear on other components, further improve the reliability and stability of the motor stator insulation frame, reduce the probability of failure, and help improve the performance and service life of the motor.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The upper and lower frame are fixed to the upper and lower parts of the motor stator respectively. The first and second isolation slots are seamlessly connected to form an isolation cavity, which can avoid the problem of the upper and lower cover plates of the insulating frame being misaligned with the iron core slots due to inaccurate positioning, and effectively protect the insulation of the stator winding.

[0025] 2. It can solve the problem of deformation and warping of insulating paper during the winding process in the existing technology, and prevent substandard withstand voltage insulation or winding damage;

[0026] 3. Insulation is achieved through an insulating frame structure, eliminating the need for ropes to bind lead wires and cross wires, which helps improve production efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the insulating frame of the motor stator structure with windings in the embodiments of this application;

[0028] Figure 2 This is a schematic diagram showing the disassembly of the upper and lower frames of the motor stator insulation frame in an embodiment of this application;

[0029] Figure 3 This is a top view of the electronic stator insulating frame in an embodiment of this application.

[0030] Reference numerals: 1. Upper frame; 11. Upper cover; 111. Upper support ring; 112. Upper insulating wing; 12. First isolation groove; 13. Winding stop block; 14. Positioning block; 15. Terminal block; 16. Connecting copper sheet; 17. First locking platform; 18. First reinforcing rib; 19. Second reinforcing rib; 2. Lower frame; 21. Lower cover; 211. Lower support ring; 212. Lower insulating wing; 22. Second isolation groove; 23. Limiting block; 24. Second locking platform. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.

[0032] This application discloses an electric motor stator insulation frame.

[0033] Reference Figure 1 and Figure 2 An insulating frame for a motor stator includes an upper frame 1 and a lower frame 2. The upper frame 1 and the lower frame 2 are fitted together and installed on the upper and lower parts of the motor stator. The first isolation groove 12 of the upper frame 1 and the second isolation groove 22 of the lower frame 2 seamlessly abut against each other to form an isolation cavity. This fit effectively isolates the stator windings from the outside environment, preventing external factors from affecting the insulation performance of the windings and producing a good insulation effect. Because the seamless isolation cavity can prevent dust, moisture and other impurities from entering the winding area, it ensures the insulation environment of the windings.

[0034] Reference Figure 1 and Figure 3 The upper frame 1 includes an upper cover 11 and first isolation grooves 12 spaced circumferentially along the upper cover 11. The upper cover 11 includes an upper support ring 111 and upper insulating wings 112 fixed to the outer edge of the upper support ring 111, consistent with the ends of the stator teeth. The upper support ring 111 serves to support the entire upper frame 1 and is usually made of high-strength plastic material, but it can also be made of rubber material with a certain degree of rigidity, as long as it meets the support requirements. The shape and size of the upper insulating wings 112 are adapted to the ends of the stator teeth, which can better cover the stator teeth and enhance the insulation effect. The upper insulating wings 112 can be integrally formed with the upper support ring 111 by injection molding or fixed to the upper support ring 111 by bonding. The first isolation grooves 12 are fixedly installed between any two upper insulating wings 112 of the upper cover 11. The first isolation grooves 12 are generally elongated structures, and their material is similar to that of the upper cover 11, which can also be plastic or rubber. The connection between the first isolation groove 12 and the upper insulating wing 112 can be integrally formed or snap-fit ​​connected, ensuring a firm connection between the two.

[0035] Reference Figure 1 and Figure 3 The lower frame 2 includes a lower cover 21 and second isolation grooves 22 spaced circumferentially along the lower cover 21. The lower cover 21 includes a lower support ring 211 and lower insulating wings 212 fixed to the outer edge of the lower support ring 211, consistent with the ends of the stator teeth. The function and structure of the lower support ring 211 and lower insulating wings 212 are similar to those of the upper support ring 111 and upper insulating wings 112, also for the purpose of support and insulation. The second isolation grooves 22 are fixedly installed between any two lower insulating wings 212 of the lower cover 21, and their structure and installation method are similar to those of the first isolation groove 12. The upper insulating wings 112 and lower insulating wings 212 between the adjacent sidewalls of any two adjacent isolation cavities and the corresponding sidewalls form a receiving cavity for the stator teeth. The receiving cavity can just accommodate the stator teeth, further ensuring the insulation of the stator teeth. When the stator teeth are placed in the receiving cavity, the upper insulating wings 112 and lower insulating wings 212, as well as the sidewalls of the isolation cavity, can provide all-round insulation protection for the stator teeth.

[0036] Reference Figure 1 and Figure 2 A winding stop block 13 is fixedly installed on the upper surface of the upper insulating wing 112 near the upper support ring 111. The winding stop block 13 can be cuboid in shape, generally made of rigid plastic, but can also be made of ceramic material. Its function is to prevent the winding from deviating from the normal position during the winding process and to ensure the regularity of the winding. The connection between the winding stop block 13 and the upper insulating wing 112 can be an embedded connection or a welded connection.

[0037] Reference Figure 1 and Figure 2 A positioning block 14 is fixedly installed on the upper part of the outer wall of the upper support ring 111. The positioning block 14 is usually a block structure, and the material can be metal or plastic. Its function is to provide accurate positioning for the upper frame 1 when it is installed, so as to avoid misalignment between the upper frame 1 and the stator slot. The positioning block 14 and the upper support ring 111 can be connected by bolts or by snap-fit.

[0038] Reference Figure 1 and Figure 2 A limiting block 23 is fixedly installed on the lower surface of the lower insulating wing 212 on the side away from the lower support ring 211. The limiting block 23 is generally a circular or square block structure, and the material can be rubber or plastic. Its function is to limit the lower frame 2 during installation, so that it is accurately installed in the appropriate position on the stator. The connection between the limiting block 23 and the lower insulating wing 212 can be adhesive or heat-fused.

[0039] Reference Figure 1 A terminal block 15 is fixedly mounted on the upper surface of the upper insulating wing 112, away from the upper support ring 111. The terminal block 15 can be a round or square metal block, usually made of copper or aluminum. It is used to connect the motor leads and crossover wires, facilitating circuit connection. A copper contact piece 16 is fixedly inserted into the terminal block 15. The shape of the copper contact piece 16 is adapted to the terminal block 15, allowing it to be firmly inserted into the terminal block 15 and ensuring the stability of the electrical connection.

[0040] Reference Figure 2 and Figure 3 Each of the first isolation grooves 12 has a first engaging platform 17 at its free end, and each of the second isolation grooves 22 has a second engaging platform 24 at its free end that matches the first engaging platform 17. The first engaging platform 17 and the second engaging platform 24 can be trapezoidal or rectangular protrusions and grooves. When the first isolation groove 12 abuts against the second isolation groove 22, the first engaging platform 17 and the second engaging platform 24 engage with each other, further enhancing the sealing of the isolation cavity and preventing impurities from entering from the abutment point.

[0041] Reference Figure 2 and Figure 3The upper insulating wing 112 has a first reinforcing rib 18 on its upper surface, and the bottom of the first insulating groove 12 has a second reinforcing rib 19. Both the first reinforcing rib 18 and the second reinforcing rib 19 have arc-shaped surfaces. The function of the reinforcing ribs is to enhance the strength of the upper insulating wing 112 and the first insulating groove 12 and prevent deformation during use. They can be integrally molded with the upper insulating wing 112 and the first insulating groove 12 by injection molding, and the material is the same as that of the upper insulating wing 112 and the first insulating groove 12.

[0042] The implementation principle of this embodiment is as follows:

[0043] This motor stator insulation frame, through the cooperation of the upper frame 1 and the lower frame 2, and the coordinated action of various components, achieves effective insulation protection for the motor stator windings. The precise positioning and connection of the upper frame 1 and the lower frame 2 avoids the misalignment problem between the upper and lower cover plates 21 and the core slots in traditional insulation methods. The formation of the isolation cavity provides a closed insulating space for the windings, preventing interference from external impurities. The inclusion of components such as the winding stop block 13, positioning block 14, and limiting block 23 improves the accuracy of winding and the convenience of frame installation. The design of the terminals 15 and the copper connecting plates 16 simplifies the connection methods for leads and crossovers, improving production efficiency. The presence of reinforcing ribs enhances the structural strength of the frame and extends its service life. Compared with existing technologies, this insulation frame represents a significant improvement and enhancement in insulation effect, installation convenience, and production efficiency.

[0044] The above are all preferred embodiments 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 motor stator insulation frame, characterized in that: The system includes an upper frame (1) and a lower frame (2). The upper frame (1) includes an upper cover (11) and a first isolation groove (12) arranged circumferentially along the upper cover (11). When the upper frame (1) is fixed to the upper part of the motor stator, the first isolation groove (12) fits into the stator groove. The lower frame (2) includes a lower cover (21) and a second isolation groove (22) arranged circumferentially along the lower cover (21). When the lower frame (2) is fixed to the lower part of the motor stator, the second isolation groove (22) fits into the stator groove. The end of the first isolation groove (12) away from the upper cover (11) and the end of the second isolation groove (22) away from the lower cover (21) are seamlessly connected to form an isolation cavity that fits into the stator groove.

2. The motor stator insulation frame according to claim 1, characterized in that: The upper cover (11) includes an upper support ring (111) and an upper insulating wing (112) fixed on the outer edge of the upper support ring (111) and aligned with the end of the stator teeth. The lower cover (21) includes a lower support ring (211) and a lower insulating wing (212) fixed on the outer edge of the lower support ring (211) and aligned with the end of the stator teeth. The first isolation groove (12) is fixedly installed between any two upper insulating wings (112) of the upper cover (11). The second isolation groove (22) is fixedly installed between any two insulating wings of the lower cover (21). The upper insulating wing (112) and the lower insulating wing (212) between the adjacent sidewalls of any two adjacent isolation cavities and the corresponding sidewalls cooperate to form a stator tooth receiving cavity.

3. An electrical machine stator insulation former according to claim 2, characterised in that: A winding stop block (13) is fixedly installed on the upper surface of the upper insulating wing (112) near the upper support ring (111).

4. An electrical machine stator insulation former according to claim 2, characterised in that: A positioning block (14) is fixedly installed on the upper part of the outer wall of the upper support ring (111).

5. An electrical machine stator insulation former according to claim 2, characterised in that: A limiting block (23) is fixedly installed on the lower surface of the lower insulating wing (212) on the side away from the lower support ring (211).

6. The motor stator insulation frame according to claim 2, characterized in that: A terminal block (15) is fixedly installed on the upper surface of the upper insulating wing (112) away from the upper support ring (111), and a copper wire piece (16) is fixedly inserted into the terminal block (15).

7. An electrical machine stator insulation former according to claim 1, characterized in that: Each of the first isolation grooves (12) has a first engagement platform (17) at its free end, and each of the second isolation grooves (22) has a second engagement platform (24) at its free end that matches the first engagement platform (17).

8. An electrical machine stator insulation former according to claim 2, characterized in that: The upper insulating wing (112) is provided with a first reinforcing rib (18) on its upper surface, and a second reinforcing rib (19) is provided at the bottom of the first isolation groove (12). The surfaces of the first reinforcing rib (18) and the second reinforcing rib (19) are both arc-shaped.

Images