Stator core of a flat wire vertical winding motor for a robot

Abstract

This utility model relates to a stator core for a flat wire vertically wound motor used in robots, comprising a core yoke ring and a core tooth assembly. The core tooth assembly includes multiple independent single-tooth core blocks arranged equidistantly along the circumference, with end pressure rings fixed to both ends of each independent single-tooth core block. The core yoke ring is inserted and fixed to the inner circumference of the multiple independent single-tooth core blocks. This utility model adopts a split structure of "core yoke ring + independent single-tooth core block," and the two ends of the tooth block are fixed into a rigid assembly by the end pressure rings, and then the yoke ring is inserted into the inner circumference of the tooth block. This structure subverts the traditional integrated tooth and yoke or bolt connection mode, and has the following advantages: 1. Each tooth block can be wound independently (the coil does not need to pass through the slot), greatly improving the efficiency and consistency of flat wire vertical winding; 2. The yoke ring and the inner circumference of the tooth block are inserted and matched to ensure air gap uniformity; 3. Damaged single teeth can be replaced independently, reducing maintenance costs.

Description

Technical Field

[0001] This utility model belongs to the field of motor stator structure technology, and particularly relates to a stator core for a flat wire vertical winding motor used in robots. Background Technology

[0002] In the field of motor stator manufacturing, flat wire winding technology has gradually become the preferred solution for high power density motors due to its advantages such as high slot fill factor, excellent heat dissipation, and low loss. However, traditional flat wire stators usually adopt an integral iron core structure, which has the following inherent defects: 1. Complex manufacturing process: The integral iron core requires vertical winding of flat wires in a narrow tooth space, which requires extremely high precision of the winding equipment and is very easy to cause insulation damage due to the rigidity of the wire; 2. Poor maintainability: When a single tooth coil is damaged, the entire winding needs to be disassembled, resulting in high maintenance costs. Utility Model Content

[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a stator core for a flat wire vertical winding motor for robots, which is easy to wind and has a robust and stable structure.

[0004] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0005] A stator core for a flat wire vertical winding motor for robots includes a core yoke ring and a core tooth assembly. The core tooth assembly includes multiple single-tooth independent core blocks arranged at equal intervals along the circumference, and end pressure rings are fixed at both ends of the multiple single-tooth independent core blocks. The core yoke ring is inserted and fixed at the inner circumference of the multiple single-tooth independent core blocks.

[0006] As a preferred embodiment, the single-tooth independent iron core block is T-shaped with the large end facing outward and the small end facing inward. A V-shaped positioning protrusion A is also provided at the end near the center. Multiple V-shaped slots extending axially are provided on the outer wall of the iron core yoke ring. The single-tooth independent iron core block is fixed by the cooperation of the V-shaped positioning protrusion A and the V-shaped slot.

[0007] As a preferred embodiment, the end pressure ring includes an outer connecting ring and a radial extension. The outer connecting ring connects multiple radial extensions into a whole piece, and the radial extension covers the single-tooth independent iron core block. The inner end of the radial extension is also provided with a V-shaped positioning protrusion B, which is also inserted and fixed with the V-shaped groove of the iron core yoke ring.

[0008] As a preferred embodiment, the iron core is further provided with an insulating coating layer, the thickness of which is 0.1~0.2mm.

[0009] As a preferred embodiment, the insulating coating layer includes an end face coating layer coated at both ends of the iron core, and an inter-tooth groove coating layer coated in the winding groove formed by the iron core yoke ring and the iron core tooth assembly.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This invention adopts a split structure of "iron core yoke ring + independent single-tooth iron core block", and the two ends of the tooth block are fixed into a rigid component by end pressure rings, and then the yoke ring is inserted into the inner circumference of the tooth block. This structure subverts the traditional integrated tooth and yoke or bolt connection mode and has the following advantages: 1. The single tooth block can be wound independently (the coil does not need to pass through the slot), which greatly improves the efficiency and consistency of flat wire vertical winding; 2. The yoke ring and the inner circumference of the tooth block are inserted and matched to ensure the uniformity of air gap; 3. Damaged single teeth can be replaced independently, reducing maintenance costs. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0013] Figure 1 This is a schematic diagram of the exploded structure of the iron core of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the single-tooth independent iron core block of this utility model;

[0015] Figure 3 This is a schematic diagram of the end pressure ring of this utility model;

[0016] Figure 4 This is a schematic diagram of the iron core yoke ring of this utility model.

[0017] The reference numerals in the accompanying drawings are as follows: 1. Core yoke ring; 11. V-groove; 21. Single-tooth independent core block; 211. V-shaped positioning protrusion A; 22. End pressure ring; 221. Outer connecting ring; 222. Radial extension; 223. V-shaped positioning protrusion B; 51. End face coating layer; 52. Coating layer inside the tooth groove. Detailed Implementation

[0018] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] like Figures 1 to 4 The stator core of a flat wire vertical winding motor for a robot shown includes a core yoke ring 1 and a core tooth assembly. The core tooth assembly includes a plurality of single-tooth independent core blocks 21 arranged at equal intervals along the circumference, and end pressure rings 22 are fixed at both ends of the plurality of single-tooth independent core blocks 21. The core yoke ring 1 is inserted and fixed at the inner circumference of the plurality of single-tooth independent core blocks 21.

[0026] The single-tooth independent iron core block 21 is T-shaped with the large end facing outward and the small end facing inward. The end near the center is also provided with a V-shaped positioning protrusion A211. The outer wall of the iron core yoke ring 1 is provided with a plurality of V-shaped slots 11 extending along the axial direction. The single-tooth independent iron core block 21 is fixed by the cooperation of the V-shaped positioning protrusion A211 and the V-shaped slots 11.

[0027] The T-shaped tooth block structure (large end facing out) can increase the winding slot area, accommodate more flat wires, and improve the slot fill factor; the V-shaped positioning protrusion A and the slot opening can constrain the circumferential displacement of the single tooth independent iron core block 21, avoid displacement caused by electromagnetic vibration, and the V-shaped engagement has self-guiding properties, simplifying the automated assembly process and realizing rapid assembly.

[0028] The end pressure ring 22 includes an outer connecting ring 221 and a radial extension 222. The outer connecting ring 221 connects multiple radial extensions 222 into a whole piece, and the radial extensions 222 cover the single-tooth independent iron core block 21. The inner end of the radial extension 222 is also provided with a V-shaped positioning protrusion B223, which is also inserted and fixed to the V-shaped groove 11 of the iron core yoke ring 1. The radial extension covering the tooth block can suppress magnetic leakage at the tooth end, reduce edge magnetic flux loss, and improve the uniformity of air gap magnetic flux density. Moreover, the structure of the end pressure ring fixation solves the circumferential displacement problem of the split tooth block and ensures the tooth pitch accuracy.

[0029] The iron core is further provided with an insulating coating layer, the thickness of which is 0.1~0.2mm. The insulating coating layer includes end-face coating layers 51 coated at both ends of the iron core, and inter-tooth groove coating layers 52 coated within the winding slots formed by the iron core yoke ring 1 and the iron core tooth assembly 2. In the above structure, the end-face coating layer prevents discharge between the coil and the iron core end face, and the inter-tooth groove coating layer prevents creepage between adjacent teeth.

[0030] The stator core structure of this invention is particularly suitable for applications with stringent requirements for power density and reliability, such as drive motors for new energy vehicles and joint motors for robots.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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.

[0032] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A stator core of a flat wire vertical winding motor for a robot, characterized by: The assembly includes a core yoke ring (1) and a core tooth assembly. The core tooth assembly includes multiple single-tooth independent core blocks (21) that are equidistantly spaced along the circumference. Each of the multiple single-tooth independent core blocks (21) has an end pressure ring (22) fixed at both ends. The core yoke ring (1) is inserted and fixed at the inner circumference of the multiple single-tooth independent core blocks (21).

2. The stator core of a flat wire vertical winding motor for a robot according to claim 1, characterized by, The single-tooth independent iron core block (21) is T-shaped with the large end facing outward and the small end facing inward. The end near the center is also provided with a V-shaped positioning protrusion A (211). The outer wall of the iron core yoke ring (1) is provided with multiple V-shaped slots (11) extending along the axial direction. The single-tooth independent iron core block (21) is fixed by the cooperation of the V-shaped positioning protrusion A (211) and the V-shaped slot (11).

3. The stator core of a flat wire vertical winding motor for a robot according to claim 2, wherein The end pressure ring (22) includes an outer connecting ring (221) and a radial extension (222). The outer connecting ring (221) connects multiple radial extensions (222) into a whole piece, and the radial extension (222) covers the single tooth independent iron core block (21). The inner end of the radial extension (222) is also provided with a V-shaped positioning protrusion B (223). The V-shaped positioning protrusion B (223) is also inserted and fixed with the V-shaped groove (11) of the iron core yoke ring (1).

4. The stator core of a flat wire vertical winding motor for a robot according to claim 1, wherein The iron core is also provided with an insulating coating layer, the thickness of which is 0.1~0.2mm.

5. The stator core of a flat wire vertical winding motor for a robot according to claim 4, wherein The insulating coating includes an end face coating (51) applied to both ends of the iron core, and an inter-tooth groove coating (52) applied to the winding groove formed by the iron core yoke ring (1) and the iron core tooth assembly (2).

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