A rotor core structure of a direct drive motor

Abstract

This utility model provides a rotor core structure for a direct-drive motor, belonging to the technical field of rotor core structures. It includes a rotor core body with a central shaft hole for mounting the motor shaft. Multiple sets of magnet mounting slots are formed on the outer circumference of the rotor core body, with permanent magnets mounted on one side of each slot. A fixing plate is provided between the permanent magnets and the mounting slots. End plates are provided at both ends of the rotor core body, with multiple sets of heat dissipation holes on the end plates. Multiple sets of axial cooling grooves are formed on the inner wall of the rotor core body, with guide frames within each groove. A mounting boss for connecting to motor components is provided at the bottom of the rotor core body. During motor operation, the spiral guide vanes within the axial cooling grooves guide rapid airflow, forming a circulating heat dissipation channel in conjunction with the heat dissipation holes on the end plates.

Description

Technical Field

[0001] This utility model belongs to the field of rotor core structure technology, and more specifically, it relates to a rotor core structure for a direct drive motor. Background Technology

[0002] In the fields of new energy vehicle drive, industrial equipment transmission, and automated production lines, the rotor core of a direct-drive motor is often used to convert electromagnetic energy into mechanical energy. During high-speed operation of the motor, in order to ensure the stability of power output, the rotor core often works with permanent magnets to construct a magnetic field. However, traditional devices lack heat dissipation capabilities, resulting in a large amount of heat generated by the rotor core and permanent magnets during long-term motor operation that cannot be dissipated in time. This heat accumulates continuously inside the device, and under high temperatures, the permanent magnets are prone to significant degradation of their magnetic properties, leading to unstable motor power output. This not only affects the normal operation of the equipment and reduces work efficiency, but also accelerates the aging of internal components of the rotor core due to excessively high temperatures, increasing the motor's failure rate and ultimately shortening its overall lifespan. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a rotor core structure for a direct-drive motor, thereby solving the technical problem that traditional devices in the prior art lack heat dissipation functionality.

[0004] The purpose and effect of the rotor core structure of the direct drive motor of this utility model are achieved by the following specific technical means:

[0005] A rotor core structure for a direct-drive motor includes a rotor core body with a central shaft hole for mounting the motor shaft. Multiple sets of magnet mounting slots are formed on the outer circumferential surface of the rotor core body, and a permanent magnet is disposed on one side of each of the multiple sets of magnet mounting slots. A fixing plate is provided between the multiple sets of permanent magnets and the multiple sets of magnet mounting slots. End plates are provided at both ends of the rotor core body, and multiple sets of heat dissipation holes are formed on the multiple sets of end plates. Multiple sets of axial cooling grooves are formed on the inner wall of the rotor core body, and a guide support frame is disposed within each of the multiple sets of axial cooling grooves. A mounting boss for connecting with motor components is provided at the bottom of the rotor core body.

[0006] According to a preferred embodiment, multiple sets of magnet mounting slots are arranged at equal intervals along the circumference of the rotor core body, multiple sets of end plates are connected to both ends of the rotor core body by bolts, and multiple sets of heat dissipation holes are distributed in a circular array.

[0007] According to a preferred embodiment, multiple sets of axial cooling grooves penetrate both ends of the rotor core body, and multiple sets of guide bearing frames are provided with guide vanes, which are spiral in shape.

[0008] According to a preferred embodiment, one side of the fixing plate is attached to multiple sets of magnet mounting slots, and the other side is connected to multiple sets of permanent magnets. The outer wall of the multiple sets of permanent magnets is provided with a protective layer, which is sleeved on the rotor core body. The protective layer is made of corrosion-resistant material.

[0009] According to a preferred embodiment, the fixing plate is made of epoxy resin, the mounting boss is connected to one end of the rotor core body by connecting bolts, and a buffer pad is provided between a set of end plates and the protective layer.

[0010] According to a preferred embodiment, the inner wall of the rotor core body has multiple sets of grooves, and each set of grooves is provided with a permeability enhancement column. The permeability enhancement column is made of soft magnetic material and is arranged at equal intervals along the circumference of the rotor core body.

[0011] According to a preferred embodiment, an isolation cavity column is provided on one side of the plurality of magnetic permeability enhancement columns. The isolation cavity column is fitted into the central shaft hole. The outer wall of the isolation cavity column is in contact with the plurality of magnetic permeability enhancement columns. The isolation cavity column has a plurality of through holes. One of the end plates is provided with a cap. The cap is connected to one end of the isolation cavity column.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model, through the design of axial cooling grooves, guide bearing frames, guide vanes, and heat dissipation holes, enables users to dissipate heat from the rotor core body, thereby improving the heat dissipation efficiency of the device. During motor operation, the spiral guide vanes within the axial cooling grooves guide the airflow rapidly, forming a circulating heat dissipation channel in conjunction with the heat dissipation holes on the end plate. This eliminates concerns for users about the rotor core's operational stability being affected by high temperatures, thus improving the device's heat resistance during continuous operation.

[0014] 2. When using this device, the user can enhance the magnetic properties of the rotor core by using the magnet mounting slot, fixing plate, permanent magnet, and permeability enhancement column in combination, resulting in higher motor operating efficiency and improved power output. Furthermore, the protective layer and isolation cavity column reduce the corrosive effects of the external environment on internal components, extending the rotor core's lifespan, reducing maintenance costs, and improving the device's durability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembled structure of this utility model;

[0016] Figure 2This is a schematic diagram of the disassembled structure of this utility model;

[0017] Figure 3 This is a top view of the present invention;

[0018] Figure 4 This is a bottom view of the present invention.

[0019] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0020] 11. Rotor core body; 12. Central shaft hole; 13. Magnet mounting slot; 14. Permanent magnet; 15. Fixing rubber plate; 16. End plate; 17. Heat dissipation hole; 18. Axial cooling groove; 19. Guide bearing frame; 21. Mounting boss; 22. Guide plate; 23. Buffer pad; 24. Magnetic permeability enhancement column; 25. Isolation cavity column; 26. Protective layer. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.

[0022] Example:

[0023] like Figures 1 to 4 As shown, this utility model provides a rotor core structure for a direct-drive motor, including a rotor core body 11. The rotor core body 11 has a central shaft hole 12 for mounting the motor shaft. Multiple sets of magnet mounting slots 13 are provided on the outer circumference of the rotor core body 11. A permanent magnet 14 is provided on one side of each set of magnet mounting slots 13. A fixing plate 15 is provided between the multiple sets of permanent magnets 14 and the multiple sets of magnet mounting slots 13. End plates 16 are provided at both ends of the rotor core body 11. Multiple sets of heat dissipation holes 17 are provided on the multiple sets of end plates 16. Multiple sets of axial cooling grooves 18 are provided on the inner wall of the rotor core body 11. A guide bearing frame 19 is provided in each of the multiple sets of axial cooling grooves 18. A mounting boss 21 for connecting with motor components is provided at the bottom of the rotor core body 11.

[0024] Specifically, the rotor core body 11 serves as the core load-bearing component of the entire structure, providing the mounting foundation for all parts; the central shaft hole 12 is used to install the motor shaft, achieving a rigid connection between the rotor core and the shaft, ensuring that the rotor core rotates synchronously when the shaft rotates; the magnet mounting groove 13 provides the mounting position for the permanent magnet 14, ensuring the orderly distribution of the permanent magnet 14 in the circumferential direction; the fixing plate 15 fills the space between the permanent magnet 14 and the magnet mounting groove 13, which can both fix the permanent magnet 14 to prevent it from loosening and reduce the direct contact between the permanent magnet 14 and the core, thus reducing eddy current losses; the end plate 16 covers both ends of the rotor core body 11, preventing external dust from entering the interior and fixing the position of each component; the heat dissipation hole 17 cooperates with the axial cooling groove 18 to form a heat dissipation channel, reducing the temperature of the rotor during operation; the guide support frame 19 provides mounting support for the guide vane 22, and the mounting boss 21 facilitates the connection between the rotor core and other motor components (such as bearing seats, couplings, etc.) to achieve overall assembly.

[0025] Multiple sets of magnet mounting slots 13 are arranged at equal intervals along the circumference of the rotor core body 11, multiple sets of end plates 16 are connected to both ends of the rotor core body 11 by bolts, and multiple sets of heat dissipation holes 17 are distributed in a circular array.

[0026] Specifically, the equidistant arrangement of the magnet mounting slots 13 ensures that the permanent magnets 14 are evenly distributed on the outer circumference of the rotor core, making the magnetic field generated by the rotor more stable and symmetrical, and reducing torque fluctuations during motor operation; the end plate 16 is connected to the rotor core body 11 by bolts, which is stable and easy to disassemble and assemble, and can fix the components at both ends of the rotor core to prevent them from falling off during high-speed rotation; the heat dissipation holes 17 are distributed in a circular array, which can make the airflow at both ends of the rotor more uniform, improve heat dissipation efficiency, and avoid local heat accumulation.

[0027] Multiple sets of axial cooling grooves 18 penetrate both ends of the rotor core body 11, and multiple sets of guide bearing frames 19 are provided with guide vanes 22, which are spiral in shape.

[0028] Specifically, the axial cooling groove 18 runs through both ends of the rotor core, forming an axially continuous cooling channel to facilitate the flow of cooling medium (such as air or coolant); the guide support frame 19 fixes the position of the guide vane 22 to prevent it from shifting when the rotor rotates; the spiral guide vane 22 can guide the cooling medium to flow along the spiral path when the rotor rotates, prolonging the contact time between the medium and the core, enhancing the heat exchange effect, and at the same time using centrifugal force to accelerate the flow of the medium, further improving the cooling efficiency.

[0029] like Figure 1 , Figure 2As shown, one side of the fixing plate 15 is attached to the multiple magnet mounting slots 13, and the other side is connected to the multiple permanent magnets 14. The outer wall of the multiple permanent magnets 14 is provided with a protective layer 26, which is sleeved on the rotor core body 11. The protective layer 26 is made of corrosion-resistant material.

[0030] Specifically, the fixing plate 15 is attached to the magnet mounting groove 13 and the permanent magnet 14, and the permanent magnet 14 is fixed in the mounting groove by its own adhesiveness, so as to prevent the permanent magnet 14 from falling off due to centrifugal force or vibration; the protective layer 26 is fitted over the rotor core body 11 and covers the permanent magnet 14. The use of anti-corrosion materials (such as anti-corrosion plastic, stainless steel coating) can protect the permanent magnet 14 from external moisture and corrosive gases, extend the service life of the permanent magnet 14, and reduce friction damage between the permanent magnet 14 and the outside world.

[0031] The fixing plate 15 is made of epoxy resin. The mounting boss 21 is connected to one end of the rotor core body 11 by connecting bolts. A buffer pad 23 is provided between one set of end plates 16 and the protective layer 26.

[0032] Specifically, epoxy resin adhesive has the characteristics of high temperature resistance, good insulation and high bonding strength. As a fixing adhesive plate 15, it can not only reliably fix the permanent magnet 14, but also block the current path between the permanent magnet 14 and the iron core, reducing eddy current loss. The mounting boss 21 is connected to the rotor iron core body 11 by connecting bolts, which is convenient for disassembly or replacement according to the motor assembly requirements, improving the structural convenience. The buffer pad 23 is located between the end plate 16 and the protective layer 26, which can absorb the vibration friction between the end plate 16 and the protective layer 26 when the rotor rotates, reducing component wear and noise.

[0033] Multiple sets of grooves are formed on the inner wall of the rotor core body 11. Each set of grooves is provided with a permeability enhancement column 24. The permeability enhancement column 24 is made of soft magnetic material and is arranged at equal intervals along the circumference of the rotor core body 11.

[0034] Specifically, the groove provides installation space for the permeability enhancement column 24. The permeability enhancement column 24, made of soft magnetic material (such as silicon steel sheet), has high permeability characteristics. The equidistant arrangement can enhance the magnetic field strength inside the rotor core, reduce magnetic resistance, improve the magnetic energy utilization rate of the motor, and thus improve the motor efficiency and output torque.

[0035] An isolation cavity column 25 is provided on one side of the multiple sets of magnetic permeability enhancement columns 24. The isolation cavity column 25 is inserted into the central shaft hole 12. The outer wall of the isolation cavity column 25 is in contact with the multiple sets of magnetic permeability enhancement columns 24. Multiple sets of through holes are opened on the isolation cavity column 25.

[0036] Specifically, the isolation cavity column 25 is fitted inside the central shaft hole 12, and its outer wall is in contact with the magnetic permeability enhancement column 24. This can reduce magnetic leakage of the magnetic field to the central shaft hole 12, so that more magnetic field is concentrated in the permanent magnet 14 area on the outer periphery of the rotor, thereby improving the magnetic field utilization rate. The cavity structure can reduce the overall weight of the rotor and reduce rotational inertia. The through hole facilitates the flow of cooling medium, and in conjunction with the axial cooling groove 18, it further enhances the heat dissipation effect. At the same time, it can balance the internal air pressure of the rotor and reduce air resistance during rotation.

[0037] The specific usage and function of this embodiment are as follows:

[0038] In use, the motor shaft is first inserted into the central shaft hole 12 of the rotor core body 11. The central shaft hole 12 serves as a positioning connection for the motor shaft, ensuring that the two rotate synchronously. At this time, the magnetic permeability enhancement column 24 in the groove of the inner wall of the rotor core body 11 is in contact with the isolation cavity column 25, which utilizes the properties of soft magnetic material to enhance the magnetic field strength and reduce magnetic field leakage.

[0039] Next, a fixing adhesive plate 15 is laid in the magnet mounting groove 13, and the permanent magnet 14 is embedded in the magnet mounting groove 13. The permanent magnet 14 is fixed by the adhesive force of the fixing adhesive plate 15 to prevent the permanent magnet 14 from falling off when the rotor rotates.

[0040] Subsequently, a protective layer 26 is fitted on the outer wall of the permanent magnet 14. The buffer pad 23 between the protective layer 26 and the end plate 16 can reduce vibration and impact. Then, the end plate 16 is installed at both ends of the rotor core body 11 by bolts. The heat dissipation holes 17 on the end plate 16 assist in heat dissipation and at the same time form an axial limit for the permanent magnet 14.

[0041] After the end plate 16 is installed, a spiral guide vane 22 is inserted into the guide support frame 19 of the axial cooling groove 18. The guide vane 22 guides the cooling medium to flow axially, enhancing the heat dissipation effect. Finally, the rotor core structure is connected to other components of the motor through the mounting boss 21 to ensure stable overall operation.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments.

Claims

1. A rotor core structure for a direct-drive motor, comprising a rotor core body (11), characterized in that: The rotor core body (11) has a central shaft hole (12) for mounting the motor shaft. The outer circumferential surface of the rotor core body (11) has multiple sets of magnet mounting slots (13), and a permanent magnet (14) is provided on one side of each set of magnet mounting slots (13). A fixing plate (15) is provided between the multiple sets of permanent magnets (14) and the multiple sets of magnet mounting slots (13). End plates (16) are provided at both ends of the rotor core body (11), and multiple sets of heat dissipation holes (17) are provided on the multiple sets of end plates (16). Multiple sets of axial cooling grooves (18) are provided on the inner wall of the rotor core body (11), and a guide bearing frame (19) is provided in each of the multiple sets of axial cooling grooves (18). The bottom of the rotor core body (11) is provided with a mounting boss (21) for connecting with motor components.

2. The rotor core structure of a direct-drive motor according to claim 1, characterized in that: Multiple sets of magnet mounting slots (13) are arranged at equal intervals along the circumference of the rotor core body (11), multiple sets of end plates (16) are connected to both ends of the rotor core body (11) by bolts, and multiple sets of heat dissipation holes (17) are distributed in a circular array.

3. The rotor core structure of a direct-drive motor according to claim 2, characterized in that: Multiple sets of axial cooling grooves (18) penetrate both ends of the rotor core body (11), and multiple sets of guide bearing frames (19) are provided with guide vanes (22), which are spiral in shape.

4. The rotor core structure of a direct-drive motor according to claim 1, characterized in that: The fixing plate (15) is attached to one side of the multiple sets of magnet mounting slots (13) and connected to the other side of the multiple sets of permanent magnets (14). The outer wall of the multiple sets of permanent magnets (14) is provided with a protective layer (26). The protective layer (26) is sleeved on the rotor core body (11). The protective layer (26) is made of corrosion-resistant material.

5. The rotor core structure of a direct-drive motor according to claim 4, characterized in that: The fixing plate (15) is made of epoxy resin. The mounting boss (21) is connected to one end of the rotor core body (11) by connecting bolts. A buffer pad (23) is provided between a set of end plates (16) and the protective layer (26).

6. The rotor core structure of a direct-drive motor according to claim 1, characterized in that: The inner wall of the rotor core body (11) has multiple sets of grooves, and each set of grooves is provided with a permeability enhancement column (24). The permeability enhancement column (24) is made of soft magnetic material and is arranged at equal intervals along the circumference of the rotor core body (11).

7. The rotor core structure of a direct-drive motor according to claim 6, characterized in that: An isolation cavity column (25) is provided on one side of the multiple sets of magnetic permeability enhancement columns (24). The isolation cavity column (25) is fitted into the central shaft hole (12). The outer wall of the isolation cavity column (25) is in contact with the multiple sets of magnetic permeability enhancement columns (24). Multiple sets of through holes are opened on the isolation cavity column (25). One set of end plates (16) is provided with a cap. The cap is connected to one end of the isolation cavity column (25).

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