Motor stator insulation structure

Abstract

The utility model relates to the technical field of motors, in particular to a motor stator insulation structure, which comprises an insulation sleeve body, two ends of the insulation sleeve body are respectively provided with convex edges protruding outwards on two end surfaces of a stator core, the radial outer side of each convex edge is provided with a limiting block, and a groove is arranged in a motor end cover at a position corresponding to the limiting block. According to the insulation sleeve, the inner side edge of the stator core is prevented from damaging the coil through the arranged convex edge, the protection capability on the coil is stronger, the direct contact between the stator core and the end cover is ensured while the insulation sleeve body is pressed and fixed through the arranged limiting block, and the heat in the stator can be directly dissipated through the end cover.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor stator insulation structure. Background Art

[0002] In order to achieve insulation between the phases of the coil and the slots in the motor stator, it is necessary to place insulating paper between each winding and the stator core. The vibration during the operation of the motor occasionally causes the insulating paper to slip into the air gap between the stator and the rotor, affecting the stability and life of the motor. The Chinese patent application with publication number CN217508404U in the existing patent discloses a motor stator slot insulator. By setting two motor stator slot insulators to be relatively inserted into the stator core and spliced ​​together, the insulating strip is embedded in the stator core groove, and the stator core winding column is embedded in the insulating sleeve. Although the stator core has a certain insulation effect, the insulating disk covers the entire stator core end face, affecting the heat transfer of the stator core, causing the stator heat dissipation capacity to deteriorate; at the same time, due to manufacturing precision problems, gaps or extrusion deformation are prone to occur at the splicing of the two groups of insulating strips in the stator slots, affecting the overall installation precision of the insulating sleeve, causing resonance noise inside the motor and even damage to the coil during use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a motor stator insulation structure in view of the above-mentioned technical deficiencies. A limit block is set on the end face of the insulating sleeve body. While the insulating sleeve body is fixed by the limit block, direct contact between the stator core and the end cover is ensured, thereby solving the problem of poor heat dissipation of the stator.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a motor stator insulation structure, including an insulation sleeve body, the two ends of the insulation sleeve body are respectively provided with outwardly protruding convex edges at the two end surfaces of the stator core, and the radial outer side of the convex edge is provided with a limit block, and the motor end cover is provided with a groove at a position corresponding to the limit block. The convex edge is provided to prevent the inner edge of the stator core from damaging the coil, and the protection ability of the coil is stronger. While the insulation sleeve body is crimped and fixed by the limit block, the direct contact between the stator core and the end cover is ensured, so that the heat in the stator can be directly dissipated through the end cover.

[0005] To further optimize the technical solution, a plurality of limit blocks are provided at equal distances on the radial outer side of the convex edge. The plurality of limit blocks are provided to further ensure the fixing strength of the insulating sleeve body, and at the same time prevent the insulating sleeve body from loosening and causing vibration and noise.

[0006] To further optimize the technical solution, the insulating sleeve body includes an upper insulating sleeve and a lower insulating sleeve, and the upper insulating sleeve and the lower insulating sleeve are provided with equal numbers of upper insulating strips and lower insulating strips on their opposite inner sides, and each upper insulating strip is provided with a convex angle extending along the length direction at the end thereof, and an angle groove is provided at the position where the lower insulating strip and the upper insulating strip meet. The upper insulating strip and the lower insulating strip are aligned and guided by the convex angle and the angle groove at the junction of the insulating sleeve and the lower insulating sleeve to avoid circumferential deflection.

[0007] To further optimize the technical solution, the outer edge of the convex angle is provided with an angle groove chamfer, and the inner edge of the angle groove is provided with a groove groove chamfer. The provided groove chamfer realizes axial guidance and ensures a certain degree of overlap between the upper insulating sleeve and the lower insulating sleeve. While reducing the vibration noise through mutual contact and extrusion, the assembly and manufacturing precision requirements of each insulating sleeve are also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic diagram of the insulation structure in the stator in the first embodiment;

[0009] Figure 2 This is an exploded schematic diagram of the stator insulation structure of the motor in the second embodiment;

[0010] Figure 3 It is a schematic diagram of the explosion of the assembly of the motor stator insulation structure in the stator in the second embodiment.

[0011] In the figure: 1, upper insulating sleeve; 10, upper insulating strip; 101, convex corner; 11, convex edge; 12, limit block; 13, groove; 2, lower insulating sleeve; 20, lower insulating strip; 201, corner slot; 3, end cover; 4, stator core. Implementation

[0012] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the reference drawings of specific embodiments. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0013] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. used in this application document to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0014] Embodiment 1, combined with Figure 1 As shown, a motor stator insulation structure includes an insulation sleeve body, which is inserted into the stator core 4. Both ends of the insulation sleeve body are provided with outwardly protruding convex edges 11 at the two end surfaces of the stator core 4, and each convex edge 11 is provided with a limit block 12 on the radial outer side. At least one limit block 12 is provided in each convex edge 11. In this embodiment, four limit blocks 12 are evenly distributed and equidistant. A groove 13 is provided at a position corresponding to the limit block 12 in the motor end cover 3. The plane of the limit block 12 is parallel to the end surface of the stator core 4. The limit block 12 is clamped between the end cover 3 and the stator core 4 of the motor. The end cover 3 is directly in contact with the end surface of the stator core 4 on both sides of the groove 13. When in use, the motor connects the stator core 4 with the two end covers 3 at both ends through the provided screw. The insulating sleeve body is clamped between the stator core 4 and the end cover 3 by the limit block 12 to fix the insulating sleeve body. At the same time, the heat of the stator core 4 can be directly transferred to the end cover 3, which is beneficial to the heat transfer of the stator core 4. The end covers 3 at both ends are combined with the cooling fans at the ends to enhance the heat dissipation capacity of the motor, which effectively guarantees the reliable operation of the motor.

[0015] Embodiment 2, combined with Figures 2 to 3 As shown, a motor stator insulation structure, wherein the insulation sleeve body includes an upper insulation sleeve 1 and a lower insulation sleeve 2, and the upper insulation sleeve 1 and the lower insulation sleeve 2 are respectively provided with an equal number of upper insulation strips 10 and lower insulation strips 20 on the inner sides facing each other, and the upper insulation strips 10 and the lower insulation strips 20 are provided with cavities for accommodating coils, and the difference from the first embodiment is that: each upper insulation strip 10 is provided with a convex angle 101 extending along the length direction at the end, and a corner groove 201 is provided at the position where the lower insulation strip 20 and the upper insulation strip 10 are connected, and the convex angle 101 and the corner groove 201 are mutually embedded. The outer edge of the convex angle 101 is provided with a corner groove chamfer, and the inner edge of the corner groove 201 is provided with a groove groove chamfer. When in use, the upper insulating sleeve 1 and the lower insulating sleeve 2 are inserted into the wire slots from both ends of the stator core 4. The upper insulating sleeve 1 and the lower insulating sleeve 2 are connected to each other through the guidance of the convex corner 101 and the corner groove 201 to achieve the alignment and guidance of the upper insulating strip 10 and the lower insulating strip 20 to avoid circumferential deflection. The axial guidance is achieved by setting the groove chamfer, and a certain overlap between the upper insulating sleeve 1 and the lower insulating sleeve 2 is guaranteed. While reducing the vibration noise by mutual contact and extrusion, the assembly and manufacturing accuracy requirements of the upper insulating sleeve 1 and the lower insulating sleeve 2 are also reduced.

[0016] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or within the equivalent forms of such scope and boundaries.

Claims

1. A motor stator insulation structure, comprising an insulation sleeve body, characterized in that: Both ends of the insulating sleeve body are respectively provided with outwardly protruding ridges (11) at the two end surfaces of the stator core, and a limit block (12) is provided radially outside the ridge (11), and a groove (13) is provided in the motor end cover (3) at a position corresponding to the limit block (12).

2. The motor stator insulation structure according to claim 1, characterized in that: A plurality of the limit blocks (12) are arranged at equal distances on the radial outer side of the convex edge (11).

3. A motor stator insulation structure according to claim 1 or 2, characterized in that: The insulating sleeve body comprises an upper insulating sleeve (1) and a lower insulating sleeve (2); an equal number of upper insulating strips (10) and lower insulating strips (20) are respectively arranged on opposite inner sides of the upper insulating sleeve (1) and the lower insulating sleeve (2); an end of each upper insulating strip (10) is provided with a convex corner (101) extending along the length direction; and a corner groove (201) is provided at a position where the lower insulating strip (20) connects to the upper insulating strip (10).

4. The motor stator insulation structure according to claim 3, characterized in that: The outer edge of the convex corner (101) is provided with a corner bevel chamfer, and the inner edge of the corner groove (201) is provided with a groove bevel chamfer.

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