Heat dissipation mechanism for hub motor of robot

Abstract

The utility model relates to the technical field of motor heat dissipation, in particular to a robot hub motor heat dissipation mechanism, which comprises a base, a stator assembly, a rotating shaft assembly, a rotor shell and an end cover, and is characterized in that the base comprises a stator mounting part and a fixed mounting part, the stator assembly is arranged on the outer diameter of the stator mounting part, and the base is provided with a rotating cavity; one end of the rotor shell is connected with the rotating shaft assembly, rotor magnetic steel is arranged on the inner circumference of the rotor shell and is opposite to the stator assembly, the end cover is arranged at one end of the rotor shell, the base is located in the stator mounting part and is provided with a cooling channel, and the fixed mounting part is provided with a first interface and a second interface. The first interface and the second interface are respectively connected with two ends of the cooling channel. According to the utility model, the cooling channel is ingeniously arranged in the base, and the first interface and the second interface are arranged to realize the circulation of the cooling liquid, so that the heat exporting capability of the stator assembly is effectively enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor heat dissipation, in particular to a heat dissipation mechanism for a hub motor of a robot. Background Art

[0002] A robot's in-wheel motor is a highly integrated drive device that integrates the motor and transmission directly into the wheel hub. This design revolutionizes the traditional robot's power transmission structure, simplifying the mechanical structure and significantly improving space utilization. By eliminating complex components such as the drive shaft and differential in traditional drive systems, the in-wheel motor makes power transmission more direct and efficient, reducing energy losses during the transmission process.

[0003] When a robot travels at high speeds, the load on the in-wheel motor increases, increasing the heat generation rate. Existing in-wheel motors have relatively poor heat dissipation, especially internal heat, which cannot be effectively dissipated. Therefore, new improvements are needed to address the existing in-wheel motor heat dissipation. Utility Model Content

[0004] To solve the above problems, the utility model provides a robot hub motor heat dissipation mechanism by cleverly setting a cooling channel in the base and equipping a first interface and a second interface to realize the circulation of coolant, thereby effectively enhancing the heat dissipation capability of the stator assembly.

[0005] The technical solution adopted by the present invention is: a robot hub motor heat dissipation mechanism, including a base, a stator assembly, a rotating shaft assembly, a rotor housing and an end cover, the base including a stator mounting portion and a fixed mounting portion, the stator assembly is arranged on the outer diameter of the stator mounting portion, the base is provided with a rotating cavity, the rotating shaft assembly is arranged in the rotating cavity, one end of the rotor housing is connected to the rotating shaft assembly, the inner periphery of the rotor housing is provided with a rotor magnet, the rotor magnet is opposite to the stator assembly, the end cover is provided at one end of the rotor housing to cover the stator assembly, the base is located in the stator mounting portion and is provided with a cooling channel, the fixed mounting portion is provided with a first interface and a second interface, the first interface and the second interface are respectively connected to the two ends of the cooling channel, and the stator mounting portion is used to transfer the heat of the stator assembly toward the cooling channel.

[0006] A further improvement to the above solution is that the base is formed by processing aluminum alloy material, the stator mounting portion is provided with an assembly groove, the assembly groove is filled with thermal conductive adhesive, and the thermal conductive adhesive is in contact with the stator assembly.

[0007] A further improvement to the above solution is that a heat dissipation cavity is provided on the inner side of the cooling channel of the base, and a mounting platform is provided on one side of the heat dissipation cavity for mounting a circuit board.

[0008] A further improvement to the above solution is that the stator assembly includes a stator bracket and a stator winding, the stator bracket is provided with solar ribs, and the stator winding is provided on the solar ribs.

[0009] A further improvement to the above solution is that a bearing is provided in the rotating chamber, and the rotating shaft assembly is provided with a rotating shaft, one end of the rotating shaft is rotatably provided on the bearing, and the other end is connected to the rotor housing.

[0010] A further improvement to the above solution is that the rotor housing is provided with a riveted portion, the rotor housing is riveted to the rotating shaft through the riveted portion, and the rotor housing is provided with cooling fins on the periphery of the riveted portion. When the rotor housing rotates, the cooling fins are driven to rotate.

[0011] A further improvement to the above solution is that an outer connecting ring is provided on the outer periphery of the end cover, and the end cover is connected to the rotor housing through the outer connecting ring; an inner connecting ring is provided on the inner periphery of the end cover, and the end cover is connected to the fixed mounting part through the inner connecting ring.

[0012] A further improvement to the above solution is that a heat dissipation blade is provided on one side of the end cover close to the inner connecting ring, and when the rotor housing rotates, the end cover is driven to rotate synchronously, thereby driving the heat dissipation blade to rotate.

[0013] A further improvement to the above solution is that a fixing bracket is provided on the inner periphery of the rotor housing, and the fixing bracket is used to fix the rotor magnet.

[0014] A robot comprises the robot hub motor heat dissipation mechanism.

[0015] The beneficial effects of the utility model are:

[0016] Compared to existing robot hub motors, the present invention effectively enhances the stator assembly's heat dissipation capabilities by cleverly designing cooling channels within the base and equipping it with first and second interfaces for coolant circulation. This design ensures that heat generated by the stator assembly during operation is quickly and evenly transferred to the cooling channels and rapidly removed by the circulating coolant, significantly reducing the motor's operating temperature and preventing overheating. The stator assembly is directly mounted on the outer diameter of the stator mounting portion, simplifying installation and optimizing the spatial layout. This results in a compact heat dissipation mechanism and reduces the space occupied by the robot's internals. Furthermore, the provision of end caps not only enhances structural integrity but also further improves thermal isolation, ensuring targeted heat transfer to the cooling channels and minimizing energy loss. This efficient heat dissipation mechanism effectively prevents performance degradation, insulation material aging, and increased wear of mechanical components caused by prolonged high-temperature operation, significantly improving the motor's operational stability and service life. The present invention can adjust parameters such as coolant flow and temperature according to the specific application requirements to meet the heat dissipation needs of different operating environments, demonstrating strong adaptability and customizability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional schematic diagram of the heat dissipation mechanism of the robot hub motor of the utility model;

[0018] Figure 2 for Figure 1 An exploded diagram of the robot's wheel motor heat dissipation mechanism;

[0019] Figure 3 for Figure 1 An exploded diagram of the robot's wheel hub motor heat dissipation mechanism from another perspective;

[0020] Figure 4 for Figure 1 A schematic diagram of the main view of the robot's hub motor heat dissipation mechanism;

[0021] Figure 5 for Figure 4 Cross-sectional view of AA in the figure.

[0022] Explanation of the accompanying drawings: base 1, stator mounting part 11, assembly groove 111, fixed mounting part 12, first interface 121, second interface 122, rotating cavity 13, bearing 131, cooling channel 14, heat dissipation cavity 15, mounting platform 151, stator assembly 2, stator bracket 21, solar rib 211, stator winding 22, rotating shaft assembly 3, rotating shaft 31, rotor housing 4, riveted part 41, heat dissipation fins 42, rotor magnet 43, end cover 5, outer connecting ring 51, inner connecting ring 52, heat dissipation blades 53. DETAILED DESCRIPTION

[0023] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0024] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are only for the purpose of describing specific embodiments and are not intended to limit this invention. Figures 1 to 5As shown, in one embodiment of the present invention, a robot hub motor heat dissipation mechanism is provided, comprising a base 1, a stator assembly 2, a shaft assembly 3, a rotor housing 4 and an end cover 5, wherein the base 1 comprises a stator mounting portion 11 and a fixed mounting portion 12, the stator assembly 2 is arranged on the outer diameter of the stator mounting portion 11, the base 1 is provided with a rotating cavity 13, the shaft assembly 3 is arranged in the rotating cavity 13, one end of the rotor housing 4 is connected to the shaft assembly 3, the inner periphery of the rotor housing 4 is provided with a rotor magnet 43, the rotor magnet 43 is opposite to the stator assembly 2, the end cover 5 is provided at one end of the rotor housing 4 to cover the stator assembly 2, the base 1 is provided with a cooling channel 14 in the stator mounting portion 11, the fixed mounting portion 12 is provided with a first interface 121 and a second interface 122, the first interface 121 and the second interface 122 are respectively connected to the two ends of the cooling channel 14, and the stator mounting portion 11 is used to transfer the heat of the stator assembly 2 toward the cooling channel 14. This embodiment effectively enhances the heat dissipation capability of the stator assembly 2 by cleverly setting up a cooling channel 14 in the base 1 and equipping it with a first interface 121 and a second interface 122 to achieve the circulation of the coolant. This design ensures that the heat generated by the stator assembly 2 during operation can be quickly and evenly transferred to the cooling channel 14 and quickly removed by the circulating coolant, thereby significantly reducing the operating temperature of the motor and preventing overheating. The stator assembly 2 is directly mounted on the outer diameter of the stator mounting portion 11, which not only simplifies the installation steps, but also optimizes the spatial layout, making the entire heat dissipation mechanism compact and reducing the space occupied by the robot. At the same time, the provision of the end cover 5 not only enhances the integrity of the structure, but also further improves the thermal isolation effect, ensuring that heat can be directed to the cooling channel 14 and reducing energy loss. The efficient heat dissipation mechanism effectively avoids problems such as performance degradation, aging of insulation materials, and increased wear of mechanical components caused by long-term high-temperature operation of the motor, thereby significantly improving the operating stability and service life of the motor. This embodiment can adjust parameters such as coolant flow rate and temperature according to the needs of specific application scenarios to meet the heat dissipation requirements in different working environments, showing strong adaptability and customizability.

[0026] The base 1 is formed by processing an aluminum alloy material, and the stator mounting portion 11 is provided with an assembly groove 111, and the assembly groove 111 is filled with thermally conductive adhesive, and the thermally conductive adhesive is in contact with the stator assembly 2. Specifically, the base 1 is carefully processed from an aluminum alloy material with high strength and excellent thermal conductivity. This not only ensures the sturdiness of the structure, but also significantly improves the heat transfer efficiency. The stator mounting portion 11 is cleverly designed with an assembly groove 111, and the assembly groove 111 is filled with high-performance thermally conductive adhesive, which realizes seamless thermal contact between the stator assembly 2 and the base 1. As an efficient thermal bridge, the thermally conductive adhesive greatly promotes the effective conduction and dissipation of heat generated during the operation of the motor to the base 1 and even the external environment, effectively reducing the temperature of the stator and windings, extending the service life of the motor, and improving the overall operating efficiency and reliability.

[0027] The base 1 is provided with a heat dissipation cavity 15 inside the cooling channel 14. A mounting platform 151 is provided on one side of the heat dissipation cavity 15 for mounting a circuit board. In this embodiment, the heat dissipation cavity 15 accelerates the transfer of heat generated during motor operation to the external environment. The mounting platform 151 located on one side of the heat dissipation cavity 15 facilitates the integration and maintenance of the thermal management system. This technical solution not only optimizes the heat dissipation path and reduces the motor's operating temperature, but also improves the overall operational stability and reliability of the system.

[0028] The stator assembly 2 includes a stator support 21 and a stator winding 22. The stator support 21 is equipped with solar ribs 211, and the stator winding 22 is mounted on the solar ribs 211. In this embodiment, the stator support 21 is integrated into the structure of the solar ribs 211, which not only enhances the mechanical strength of the support but also provides a stable support platform for the stator winding 22 through an optimized layout. The stator winding 22 is directly mounted on the solar ribs 211. This layout effectively reduces thermal resistance, allowing heat generated by the winding during operation to be more quickly transferred to the cooling system through the solar ribs 211 and surrounding structures, promoting rapid heat dissipation.

[0029] A bearing 131 is installed within the rotating chamber 13. The rotating shaft assembly 3 includes a rotating shaft 31, one end of which is rotatably mounted on the bearing 131 and the other end is connected to the rotor housing 4. In this embodiment, one end of the rotating shaft 31 rotates freely via the low-friction, high-load-capacity bearing 131, effectively reducing mechanical wear and energy loss. The other end is securely connected to the rotor housing 4, ensuring continuous and efficient power transmission.

[0030] The rotor housing 4 is provided with a riveted portion 41, which is riveted to the rotating shaft 31 via the riveted portion 41. The rotor housing 4 is provided with cooling fins 42 on the outer periphery of the riveted portion 41. When the rotor housing 4 rotates, the cooling fins 42 are driven to rotate. Specifically, the outer periphery of the end cap 5 is provided with an outer connecting ring 51, which is connected to the rotor housing 4 via the outer connecting ring 51. The inner periphery of the end cap 5 is provided with an inner connecting ring 52, which is connected to the fixed mounting portion 12 via the inner connecting ring 52. Cooling fins 53 are provided on the side of the end cap 5 near the inner connecting ring 52. When the rotor housing 4 rotates, the end cap 5 is driven to rotate synchronously, thereby driving the cooling fins 53 to rotate. In this embodiment, a riveted design is adopted for the rotor housing 4 and the rotating shaft 31, combined with cooling fins 42 densely distributed on the outer periphery. This not only ensures a stable connection between the rotor housing 4 and the rotating shaft 31, but also significantly improves heat exchange efficiency through the dynamic action of the fins during rotation, effectively reducing the temperature during motor operation. In addition, the double-ring connection structure of the end cover 5 (the outer connecting ring 51 to the rotor housing 4, and the inner connecting ring 52 to the fixed installation portion 12) realizes stable assembly and support. At the same time, the heat dissipation blades 53 integrated on the inner side of the end cover 5 rotate synchronously with the rotor housing 4, forming a strong air flow, further enhancing the heat dissipation effect.

[0031] The rotor housing 4 is equipped with cooling fins 53 on its inner circumference, securing the rotor magnets 43. In this embodiment, the presence of these fins promotes uniform heat distribution and rapid heat removal from the rotor's interior, reducing heat accumulation in the magnet area. Combined with the hub motor's integrated heat dissipation mechanisms, such as the water-cooling jacket and oil chamber, this achieves a multi-layered heat dissipation effect, significantly reducing the motor's operating temperature. Both the rotor housing 4 and the end cap 5 are equipped with heat dissipation holes to dissipate heat from the motor's interior.

[0032] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A robot hub motor heat dissipation mechanism, characterized by: It includes a base, a stator assembly, a shaft assembly, a rotor housing and an end cover. The base includes a stator mounting portion and a fixed mounting portion. The stator assembly is arranged on the outer diameter of the stator mounting portion. The base is provided with a rotating cavity. The shaft assembly is arranged in the rotating cavity. One end of the rotor housing is connected to the shaft assembly. The inner circumference of the rotor housing is provided with a rotor magnet. The rotor magnet is opposite to the stator assembly. The end cover is provided at one end of the rotor housing to cover the stator assembly. The base is located in the stator mounting portion and is provided with a cooling channel. The fixed mounting portion is provided with a first interface and a second interface. The first interface and the second interface are respectively connected to the two ends of the cooling channel. The stator mounting portion is used to transfer the heat of the stator assembly toward the cooling channel.

2. The robot hub motor heat dissipation mechanism according to claim 1, characterized in that: The base is formed by processing an aluminum alloy material. The stator mounting portion is provided with an assembly groove. The assembly groove is filled with heat-conducting glue, and the heat-conducting glue is in contact with the stator assembly.

3. The robot hub motor heat dissipation mechanism according to claim 1, characterized in that: The base is provided with a heat dissipation cavity on the inner side of the cooling channel, and a mounting platform is provided on one side of the heat dissipation cavity for mounting a circuit board.

4. The robot hub motor heat dissipation mechanism according to claim 1, characterized in that: The stator assembly includes a stator bracket and a stator winding. The stator bracket is provided with a solar rib, and the stator winding is provided on the solar rib.

5. The robot hub motor heat dissipation mechanism according to claim 1, characterized in that: A bearing is provided in the rotating cavity, and a rotating shaft is provided in the rotating shaft assembly. One end of the rotating shaft is rotatably provided on the bearing, and the other end is connected to the rotor housing.

6. The robot hub motor heat dissipation mechanism according to claim 1, characterized in that: The rotor housing is provided with a riveted portion, through which the rotor housing is riveted to the rotating shaft. The rotor housing is provided with heat dissipation fins at the periphery of the riveted portion. When the rotor housing rotates, the heat dissipation fins are driven to rotate.

7. The robot hub motor heat dissipation mechanism according to claim 6, characterized in that: An outer connecting ring is provided on the outer periphery of the end cover, and the end cover is connected to the rotor housing through the outer connecting ring. An inner connecting ring is provided on the inner periphery of the end cover, and the end cover is connected to the fixed installation part through the inner connecting ring.

8. The robot hub motor heat dissipation mechanism according to claim 7, characterized in that: A heat dissipation blade is provided on one side of the end cover close to the inner connecting ring. When the rotor housing rotates, the end cover is driven to rotate synchronously, thereby driving the heat dissipation blade to rotate.

9. The robot hub motor heat dissipation mechanism according to claim 1, characterized in that: A fixing bracket is provided on the inner periphery of the rotor housing, and the fixing bracket is used to fix the rotor magnet.

10. A robot, characterized in that: The robot hub motor heat dissipation mechanism comprises the heat dissipation mechanism of any one of claims 1 to 9.

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