Motor stator structure

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a motor stator structure. The transformer comprises an iron core, an iron core groove formed in the iron core, an insulation sleeve located in the iron core groove, an insulation cover covering the insulation sleeve and a winding wound around the insulation sleeve. The top and the bottom of the insulating sleeve respectively correspond to an insulating cover; the insulation cover is connected with the insulation sleeve through a buckle structure. According to the utility model, the insulation cover and the insulation sleeve are matched with each other and are connected through the inclined plane buckle, so that the buckle cover always has stress for outward movement and can be always and effectively attached to the corresponding winding group at the upper part, and the phenomenon that the winding group is aged after being used for a long time and looses up and down is effectively prevented.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and in particular relates to a motor stator structure. Background Technology

[0002] In the field of motor manufacturing, most motor stator structures adopt a relatively traditional design. The insulation material between the core slots and the windings is usually made of a single layer of material, and the height of the slot insulation is consistent with that of the stator core slots. This structure has revealed many drawbacks in practical applications.

[0003] During motor operation, the windings may become loose within the iron core slots, causing continuous friction between the winding wires and the slot insulation, eventually leading to insulation failure. In severe cases, this can even result in damage to the insulation material or breakage of the winding wires, seriously affecting the normal operation and service life of the motor.

[0004] Meanwhile, in actual use of motor products, the temperature at the winding ends is generally higher than that of the core and slots. This temperature difference makes the thermal aging of the slot insulation at this location more severe than in other parts of the core, further exacerbating the decline in insulation performance.

[0005] Traditional designs fail to provide a continuous preload mechanism to ensure that the winding and insulation material always maintain appropriate contact pressure, and lack effective preventive measures against aging and loosening of the winding that may occur after long-term use. Summary of the Invention

[0006] This utility model addresses the shortcomings of existing technologies by providing a motor stator structure.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a motor stator structure, including an iron core, an iron core slot disposed on the iron core, an insulating sleeve located within the iron core slot, an insulating cover covering the insulating sleeve, and a winding wound on the insulating sleeve; an insulating cover is located at the top and bottom of the insulating sleeve; the insulating cover is connected to the insulating sleeve by a snap-fit ​​structure. Furthermore, the snap-fit ​​structure is an angled snap-fit.

[0008] Furthermore, each insulating sleeve includes a riser, with a boss at each end of the riser. A slot is formed on the inner wall of each boss. The slot is used to engage with the snap-fit ​​structure on the insulating cover to achieve the connection between the insulating sleeve and the insulating cover.

[0009] Furthermore, an insulating sleeve is arranged within each core slot; each core slot has a stepped groove at both its top and bottom, wherein the top stepped groove corresponds to the top boss of the insulating sleeve, and the bottom stepped groove corresponds to the bottom boss of the insulating sleeve; this is used to position the insulating sleeve and the insulating cover for installation; during installation, the top boss is located within the top stepped groove, and the bottom boss is located within the bottom stepped groove. Furthermore, the riser is fitted against the inner wall of the corresponding core slot.

[0010] Furthermore, the insulating cover is provided with multiple slots, and the number of slots is equal to the number of iron core slots, with each slot corresponding to one iron core slot; each slot has a snap-fit ​​structure on its outer edge, which cooperates with the corresponding insulating sleeve's slot to form a snap-fit ​​structure; ensuring a stable connection between the insulating cover and the insulating sleeve.

[0011] Furthermore, the inner wall surface of the groove has a rounded corner.

[0012] Furthermore, the snap-fit ​​structure of the insulating cover is provided with an inclined surface, and the slot has a slope adapted to the inclined surface; the inclined surface causes a force to be generated by the interaction between the inclined surface and the slot when the insulating cover is connected to the insulating sleeve, thereby achieving a stable connection.

[0013] Furthermore, the angle of the inclined plane is in the range of 10 to 45 degrees, so as to ensure holding force while installing.

[0014] Furthermore, the snap-fit ​​structure is elastic, allowing it to deform and embed itself into the slot when snapped into it, thereby ensuring a stable connection between the insulating cover and the insulating sleeve.

[0015] Furthermore, a gap is left between the insulating cover and the iron core to promote ventilation and heat dissipation of the winding assembly.

[0016] Compared with the prior art, this utility model has the following advantages.

[0017] The stator structure of this utility model adopts the form of an insulating cover and an insulating sleeve, which are connected by a beveled buckle. This ensures that the buckle cover always has an outward moving stress, which can always effectively fit the corresponding upper winding group, effectively preventing the winding group from aging and loosening after long-term use.

[0018] This utility model's motor stator structure has a gap between the insulating cover and the stator, which effectively enables ventilation and heat dissipation of the winding assembly, thus improving heat dissipation and extending the equipment's service life. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0020] Figure 1 This is a three-dimensional view of the motor stator structure in the embodiment.

[0021] Figure 2 This is a three-dimensional view of the stator core structure of the motor in the embodiment.

[0022] Figure 3 This is a top view of the motor stator structure in the embodiment.

[0023] Figure 4 This is a three-dimensional view of the insulating sleeve of the motor stator structure in the embodiment.

[0024] Figure 5 This is a three-dimensional view of the insulation cover of the motor stator structure in the embodiment.

[0025] Figure 6 yes Figure 3 EE sectional view.

[0026] Figure 7 This is a schematic diagram of the initial connection between the insulating cover and the insulating sleeve during stator winding.

[0027] Figure 8 This is a schematic diagram showing the fit between the insulating cover and the insulating sleeve after the stator winding has been in operation for a period of time.

[0028] In the diagram, 1. Iron core; 2. Iron core groove; 3. Insulating sleeve; 4. Insulating cover; 5. Winding; 201. Step groove; 301. Riser; 302. Boss; 303. Slot; 304. Opening; 305. Step 2; 306. Step 1; 401. Rounded corner; 402. Snap-fit ​​structure; 403. Inclined surface; 404. Groove; 405. Chamfer; 406. Gap; 407. Upper end face; 408. Lower end face. Detailed Implementation

[0029] To make the objectives, technical solutions, and beneficial effects of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0030] like Figure 1-6As shown in the specific embodiment, the motor stator structure includes an iron core 1, an iron core slot 2 on the iron core 1, an insulating sleeve 3 located within the iron core slot 2, an insulating cover 4 covering the insulating sleeve 3, and a winding 5 wound around the insulating sleeve 3. An insulating cover 4 corresponds to both the top and bottom of the insulating sleeve 3. The insulating cover 4 is connected to the insulating sleeve 3 via a snap-fit ​​structure 402. By providing a boss 302 and a slot 303 on the insulating sleeve 3, and using the snap-fit ​​structure 402 on the insulating cover 4 for connection, and the snap-fit ​​structure 402 employs an angled snap-fit, a stable and easy-to-disassemble connection between the insulating sleeve and the insulating cover is achieved, enhancing the safety and reliability of the overall structure.

[0031] Example 1: Each insulating sleeve 3 includes a riser 301, with a boss 302 at each end of the riser 301. A slot 303 is formed on the inner wall of each boss 302, which is used to engage with the snap-fit ​​structure 402 on the insulating cover 4 to achieve the connection between the insulating sleeve 3 and the insulating cover 4. An insulating sleeve 3 is arranged in each iron core groove 2. Each iron core groove 2 has a stepped groove 201 at both its top and bottom ends. The stepped groove 201 at the top corresponds to the top boss 302 of the insulating sleeve 3, and the stepped groove 201 at the bottom corresponds to the bottom boss 302 of the insulating sleeve 3. This is used to position the insulating sleeve 3 and the insulating cover 4. During installation, the top boss 302 is located in the top stepped groove 201, and the bottom boss 302 is located in the bottom stepped groove 201. The design of the stepped groove 201 and the top and bottom bosses 302 of the insulating sleeve 3 ensures the precise positioning of the insulating sleeve and insulating cover during installation, reduces assembly errors, and improves the consistency of product quality.

[0032] Furthermore, the riser 301 fits snugly against the inner wall of the corresponding iron core slot 2. This not only enhances the fixing effect of the insulation sleeve but also improves the space utilization inside the motor, which helps to reduce the size of the motor and improve its performance.

[0033] In Example 2, the insulating cover 4 has multiple slots 404, at least six slots, and the number of slots 404 is equal to the number of iron core slots 2. Each slot 404 corresponds to one iron core slot 2. Each slot 404 has a snap-fit ​​structure 402 on its outer edge, which engages with the corresponding slot 303 of the insulating sleeve 3 to form a snap-fit ​​structure, ensuring a stable connection between the insulating cover 4 and the insulating sleeve 3. The inner wall surface of the slot 404 has a rounded corner 401, which reduces friction and damage that may occur during assembly, helps extend the service life of components, and improves the smoothness of assembly.

[0034] In Example 3, the insulating sleeve 3 is provided with an opening 304 extending through the length direction. When installing the insulating sleeve 3 into the iron core slot, simply pinch the insulating sleeve 3. Due to the opening 304, the insulating sleeve 3 will deform slightly, allowing it to smoothly enter the iron core slot. Then, release the applied force to install it smoothly.

[0035] In Example 4, the snap-fit ​​structure 402 of the insulating cover 4 is provided with an inclined surface 403, and the slot 303 has a slope adapted to the inclined surface 403; the angle of the inclined surface 403 is in the range of 10~45 degrees. The inclined surface is wider towards the cover and narrower away from the cover, forming an inclined structure. Specifically, the snap-fit ​​structure 402 is elastic, allowing it to deform and embed itself into the slot 303 through its own restoring force when snapped into it, thereby ensuring a stable connection between the insulating cover 4 and the insulating sleeve 3. The edge of the insulating cover 4 is chamfered 405. The chamfer 405 is designed to facilitate the assembly of the insulating cover 4 and the insulating sleeve 3, while reducing wear during connection and improving safety. In addition, a gap 406 is left between the insulating cover 4 and the iron core to promote ventilation and heat dissipation of the winding assembly. This reduces the motor's operating temperature, extends its service life, and improves operating efficiency.

[0036] The working principle of this utility model is as follows:

[0037] 1. After the wire is wound onto the motor stator, it may become loose due to various reasons (such as mechanical vibration, thermal expansion and contraction). This will not only affect the performance of the motor, but may also lead to electrical faults.

[0038] 2. The beveled structure on the buckle allows the insulating cover to slide upwards when installed on the insulating sleeve. This ensures a tight fit between the insulating cover and the winding assembly. Even after prolonged use, if the winding assembly becomes loose due to aging or other factors, this pre-tightening mechanism maintains its stability and prevents it from shifting vertically.

[0039] 3. The inclined surface 403 of the snap-fit ​​structure 402 ensures that the insulating cover 4 always has an outward stress, thereby effectively adhering to the winding 5 and preventing the winding 5 from loosening due to aging after long-term use. In other words, the inclined surface 403 of the snap-fit ​​structure 402 allows the insulating cover 4 to automatically adjust its position during assembly, ensuring close contact with the winding 5.

[0040] Specifically, such as Figure 7-8 As shown; the assembly process is as follows:

[0041] A. After the insulation cover of the stator is installed, apply pressure to the insulation covers on both sides of the stator so that the buckle of the insulation cover engages with the groove of the insulation sleeve, and the lower end face 408 of the insulation cover contacts the step 305 of the groove of the insulation sleeve. At this time, there is a distance between the upper end face 407 of the insulation cover and the step 304.

[0042] B. At this time, the stator is wound, and the winding is tightly pressed against the top of the insulating cover at the two ends of the stator.

[0043] C. After the winding work is completed, remove the external pressure applied to both sides of the stator on the insulating cover. At this time, since both the insulating sleeve and the insulating cover are made of elastic material, there is an inclined surface at the position where the insulating cover buckle and the insulating sleeve groove are engaged. This inclined surface makes the insulating cover always have a tendency to slide outward. (The pre-tightening force of the insulating cover buckle generates an upward component force on the inclined surface, which makes the insulating cover have a tendency to slide outward - static friction. If there is a gap between the winding and the top of the insulating cover, this static friction will be converted into dynamic friction, causing the insulating cover to move outward until the gap between the insulating cover and the corresponding winding is eliminated).

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "preferred embodiment," "detailed description," or "preferred embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Therefore, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of this utility model.

Claims

1. A motor stator structure, characterized in that: It includes an iron core (1), an iron core groove (2) provided on the iron core (1), an insulating sleeve (3) located in the iron core groove (2), an insulating cover (4) covering the insulating sleeve (3), and a winding (5) wound on the insulating sleeve (3); An insulating cover (4) is located at the top and bottom of the insulating sleeve (3); the insulating cover (4) is connected to the insulating sleeve (3) through a snap-fit ​​structure (402); and the snap-fit ​​structure (402) adopts a beveled snap-fit.

2. The motor stator structure according to claim 1, characterized in that: Each insulating sleeve (3) includes a riser (301), and each end of the riser (301) is provided with a boss (302). The inner wall of the boss (302) is provided with a slot (303). The slot (303) is used to cooperate with the buckle structure (402) on the insulating cover (4) to realize the connection between the insulating sleeve (3) and the insulating cover (4).

3. The motor stator structure according to claim 2, characterized in that: An insulating sleeve (3) is arranged in each iron core slot (2); wherein, a stepped groove (201) is opened at the top and bottom of each iron core slot (2), wherein the stepped groove (201) at the top corresponds to the top boss (302) of the insulating sleeve (3), and the stepped groove (201) at the bottom corresponds to the bottom boss (302) of the insulating sleeve (3); used to position the installation position of the insulating sleeve (3) and the insulating cover (4); during installation, the top boss (302) is located in the stepped groove (201) at the top, and the bottom boss (302) is located in the stepped groove (201) at the bottom.

4. The motor stator structure according to claim 2 or 3, characterized in that: The riser (301) is attached to the inner wall of the corresponding iron core groove (2).

5. The motor stator structure according to claim 2, characterized in that: The insulating cover (4) is provided with a plurality of slots (404), and the number of slots (404) is equal to the number of iron core slots (2), with each slot (404) corresponding to one iron core slot (2); each slot (404) is provided with a snap-fit ​​structure (402) on its outer edge, which cooperates with the corresponding insulating sleeve (3) slot (303) to form a snap-fit ​​structure; ensuring that the connection between the insulating cover (4) and the insulating sleeve (3) is stable.

6. The motor stator structure according to claim 5, characterized in that: The inner wall surface of the groove (404) has a rounded corner (401).

7. The motor stator structure according to claim 2, characterized in that: The buckle structure (402) of the insulating cover (4) is provided with a slope (403), and the slot (303) has a slope adapted to the slope (403); the slope (403) makes it possible to achieve a stable connection by the interaction between the slope (403) and the slot (303) when the insulating cover (4) is connected to the insulating sleeve (3).

8. The motor stator structure according to claim 7, characterized in that: The angle of the inclined plane (403) is in the range of 10 to 45 degrees, so as to ensure holding force while installing.

9. The motor stator structure according to claim 2, characterized in that: The snap-fit ​​structure (402) is elastic, so that when it is snapped into the slot (303), it can deform and embed itself into the slot (303) through its own restoring force, thereby ensuring a stable connection between the insulating cover (4) and the insulating sleeve (3).

10. The motor stator structure according to claim 9, characterized in that: A gap (406) is left between the insulating cover (4) and the iron core to promote ventilation and heat dissipation of the winding assembly.

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