A kind of tooth part for robot motor adopts riveting type cover plate core and its stator structure

Abstract

The utility model relates to a kind of core and its stator structure for robot motor tooth part using riveting type cover plate, the core includes core yoke part ring, partition block and cover plate, multiple notches extending along the axial direction are equipped on the outer wall of core yoke part ring with interval, one end of partition block is equipped with the positioning lug A of shape matching with notch, and positioning lug A is inserted in notch, cover plate is abutted on the other end of partition block, gap is left between adjacent cover plate, and core yoke part ring, partition block and cover plate are mutually fixed by rivet.The utility model realizes the accurate radial and circumferential positioning of tooth part unit by the mechanical interlocking mechanism of notch and lug, eliminates assembly cumulative error, and cover plate only covers single partition block, expansion gap is retained between adjacent cover plate, and the thermal stress problem of overall cover plate is completely avoided;Core whole adopts rivet synchronous penetration yoke part ring, partition block and cover plate to realize consolidation, avoid welding thermal damage, and significantly improve connection stiffness.

Description

Technical Field

[0001] This utility model belongs to the field of motor stator structure technology, and particularly relates to an iron core and its stator structure with riveted cover plates for the teeth of a robot motor. Background Technology

[0002] In the field of motor stator core manufacturing, traditional core structures typically employ either integral lamination stacking or welded tooth-yoke separation designs. While integral lamination structures offer good mechanical strength, they suffer from low material utilization (especially in large-size toroidal cores where the scrap rate can exceed 30%), and the stamping dies for complex tooth shapes are costly. While separate cores can improve material utilization, the connection between the teeth and yoke often relies on welding or adhesive bonding, presenting significant drawbacks: thermal deformation and stress concentration: high welding temperatures lead to localized annealing of the core, deteriorating magnetic properties; thermal stress easily induces deformation, affecting air gap uniformity; process complexity: welding requires precise tooling positioning, and post-weld straightening and stress-relief annealing are necessary, resulting in long process cycles; reliability risks: adhesive bonding interfaces are prone to aging and cracking under long-term thermal cycling, leading to tooth loosening and electromagnetic vibration noise. Utility Model Content

[0003] To solve the above-mentioned technical problems, the first objective of this utility model is to provide an iron core with a riveted cover plate for the toothed part, which has precise assembly and positioning and a stable overall structure. The second objective of this utility model is to provide a stator structure.

[0004] To achieve the first objective of the above-mentioned utility model, the present utility model adopts the following technical solution: A core for a robot motor with a riveted cover plate for the tooth section includes a core yoke ring, a partition block, and a cover plate. The outer wall of the core yoke ring is provided with a plurality of slots extending axially at intervals. One end of the partition block is provided with a positioning protrusion A that matches the shape of the slot and is inserted into the slot. The cover plate abuts against the other end of the partition block. There is a gap between adjacent cover plates. The core yoke ring, the partition block, and the cover plate are fixed to each other by rivets.

[0005] As a preferred embodiment, the positioning protrusion A is V-shaped, and the cross-section of the groove is also V-shaped.

[0006] As a preferred embodiment, the two ends of the iron core yoke ring, the partition block and the cover plate are respectively fixed with a fixing ring. The fixing ring includes an outer connecting ring and a radial extension. The outer connecting ring connects multiple radial extensions into a whole piece, and the fixing ring covers the partition block and the cover plate.

[0007] As a preferred embodiment, the inner end of the radial extension is also provided with a V-shaped positioning protrusion B, which is also inserted and fixed into the 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, the separator block and the cover plate.

[0010] To achieve the second objective of the above-mentioned utility model, the present utility model adopts the following technical solution: A stator structure includes a winding and an iron core as described in any of the above. The winding includes a coil and a PCB board. A coil is wound on each partition block. The two ends of each coil are soldered to the PCB board. The PCB board is also provided with lead wires.

[0011] As a preferred embodiment, the space between the coil and the iron core, as well as the portion of the coil exposed above the iron core, is encapsulated with a potting layer.

[0012] As a preferred option, both ends of all coils are soldered to the PCB board, forming two rings of solder joints on the PCB board. Connecting wires are pre-installed on the PCB board, so that adjacent solder joints of the inner ring are connected, and the corresponding phase ends of the outer ring are connected by cross wires.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention achieves precise radial and circumferential positioning of the toothed unit through the mechanical interlocking mechanism of the slot and the protrusion, eliminating the cumulative assembly error. Furthermore, the cover plate only covers a single partition block, and an expansion gap is retained between adjacent cover plates, completely avoiding the thermal stress problem of the overall cover plate. The entire iron core is fixed by rivets that simultaneously penetrate the yoke ring, partition block, and cover plate, avoiding welding heat damage. Moreover, the rivet clamping force causes the interface of the three to form a micro-meshing, significantly improving the connection rigidity. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded structural diagram of the present invention; Figure 3 This is a schematic diagram of the core structure of this utility model; Figure 4 This is an exploded structural diagram of the iron core of this utility model;

[0016] The reference numerals in the accompanying drawings are as follows: 11, core yoke ring; 111, slot; 12, separator block; 121, positioning protrusion; 13, cover plate; 14, rivet; 2, fixing ring; 3, coil; 4, PCB board; 41, solder hole; 42, lead wire; 5, end face coating. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments: like Figures 1 to 4 The stator structure shown includes windings and an iron core. The iron core includes an iron core yoke ring 11, a partition block 12, and a cover plate 13. The outer wall of the iron core yoke ring 11 is provided with a plurality of slots 111 extending axially at intervals. One end of the partition block 12 is provided with a positioning protrusion A121 whose shape matches the slot. The positioning protrusion A121 is V-shaped. The cross-section of the slot 111 is also V-shaped, and the positioning protrusion A121 is inserted into the slot 111. The cover plate 13 abuts against the other end of the partition block 12. There is a gap between adjacent cover plates 13. The iron core yoke ring 11, the partition block 12, and the cover plate 13 are fixed to each other by rivets 14.

[0024] The winding includes a coil 3 and a PCB board 4. A coil 3 is wound on each partition block 12. The two ends of each coil 3 are respectively inserted into the soldering holes 41 of the PCB board 4 and soldered to the PCB board 4. After the two ends of all coils 3 are soldered to the PCB board 4, two rings of solder joints are formed on the PCB board 4. Connecting wires are pre-installed on the PCB board 4 so that the adjacent solder joints of the inner ring are connected and the corresponding phase ends of the outer ring are connected by cross wires. The PCB board 4 is also provided with lead wires 6.

[0025] The inner ring connects adjacent solder joints to achieve series connection of windings of the same phase, while the outer ring connects cross wires to complete the jumper connection of each phase output terminal (such as star / delta connection). The above structure allows the winding connection to be changed (such as changing 4 poles to 6 poles) simply by changing the PCB board; at the same time, the PCB routing can compress the axial space at the end and reduce the volume at the end.

[0026] The core yoke ring 11, the separator block 12, and the cover plate 13 are each fixed with a fixing ring 2 at both ends. The fixing ring 2 includes an outer connecting ring and a radial extension. The outer connecting ring connects multiple radial extensions into a single piece, and the fixing ring 2 covers the separator block 12 and the cover plate 13. The inner end of the radial extension is also provided with a V-shaped positioning protrusion B, which is also inserted and fixed into the slot 111 of the core yoke ring 11. The fixing ring 2 can further assist in fixing the separator block 12 and the cover plate 13, ensuring the stability of the core structure.

[0027] 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 5 coated at both ends of the iron core, and inter-tooth slot coating layers coated within the winding slots formed by the iron core yoke ring 11, the separator block 12, and the cover plate 13. In the above structure, the end-face coating layer prevents discharge between the coil and the iron core end face, and the inter-tooth slot coating layer prevents creepage between adjacent teeth.

[0028] The portion of coil 3 exposed above the iron core is encapsulated with a potting layer. This full encapsulation suppresses vibration and noise: the flat wire has high rigidity and easily resonates with the iron core; the potting fills the gaps, achieving damping and vibration reduction. Furthermore, the potting material (such as epoxy resin + boron nitride) has better thermal conductivity than air, directly transferring heat from the coil to the iron core and improving heat dissipation efficiency. This structure also prevents moisture / chemical media from intruding into the gaps between the flat wires.

[0029] The structure of this utility model integrates positioning, load-bearing and thermal compensation functions. It forms a self-centering conical surface through a V-shaped groove, which has strong shear resistance. The partition block and the cover plate together form stator teeth, which can complete the coil installation before assembly, improving assembly efficiency. At the same time, the gap design between the cover plates allows each tooth unit to expand independently, suppressing thermal deformation from the source.

[0030] 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.

[0031] 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 core for use in robot motors with riveted cover plates on the teeth, characterized in that: The device includes a core yoke ring (11), a partition block (12), and a cover plate (13). The outer wall of the core yoke ring (11) is provided with a plurality of slots (111) extending along the axial direction at intervals. One end of the partition block (12) is provided with a positioning protrusion A (121) that matches the shape of the slot, and the positioning protrusion A (121) is inserted into the slot (111). The cover plate (13) abuts against the other end of the partition block (12), and there is a gap between adjacent cover plates (13). The core yoke ring (11), the partition block (12), and the cover plate (13) are fixed to each other by rivets (14).

2. The iron core for a robot motor with riveted cover plates for the teeth, as described in claim 1, is characterized in that... The positioning protrusion A (121) is V-shaped, and the cross-section of the slot (111) is also V-shaped.

3. The iron core for a robot motor with riveted cover plates for the teeth, as described in claim 1, is characterized in that... The iron core yoke ring (11), the partition block (12) and the cover plate (13) are respectively fixed with a fixing ring (2). The fixing ring (2) includes an outer connecting ring and a radial extension. The outer connecting ring connects multiple radial extensions into a whole piece, and the fixing ring (2) covers the partition block (12) and the cover plate (13).

4. The iron core for a robot motor with riveted cover plates for the teeth, as described in claim 3, is characterized in that... The inner end of the radial extension is also provided with a V-shaped positioning protrusion B, which is also inserted and fixed to the slot (111) of the iron core yoke ring (11).

5. The iron core for a robot motor with riveted cover plates for the teeth, as described in claim 1, is characterized in that... The iron core is also provided with an insulating coating layer, the thickness of which is 0.1~0.2mm.

6. The iron core for a robot motor with riveted cover plates for the teeth, as described in claim 5, is characterized in that... The insulating coating includes an end face coating (5) applied to both ends of the iron core, and an inter-tooth groove coating applied to the winding groove formed by the iron core yoke ring (11), the separator (12), and the cover plate (13).

7. A stator structure, characterized in that: The device includes a winding and an iron core as described in any one of claims 1 to 6. The winding includes a coil (3) and a PCB board (4). A coil (3) is wound on each partition block (12). The two ends of each coil (3) are respectively soldered to the PCB board (4). The PCB board (4) is also provided with lead wires (6).

8. A stator structure according to claim 7, characterized in that, The coil (3) and the iron core, as well as the portion of the coil (3) exposed above the iron core, are all encapsulated with a potting layer.

9. A stator structure according to claim 8, characterized in that, After both ends of all coils (3) are soldered to the PCB board (4), two rings of solder points are formed on the PCB board (4). Connecting lines are pre-installed on the PCB board (4) so ​​that adjacent solder points of the inner ring are connected and the corresponding phase ends of the outer ring are connected by cross lines.

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