Motor heat dissipation structure and motor

Abstract

The present application discloses a motor heat dissipation structure and a motor. The motor heat dissipation structure includes an iron core, a heat conductive sheet and a heat conductive shaft. The iron core is formed with a coil skeleton and a heat conductive hole, the heat conductive hole is coaxial with the iron core, the coil skeleton is arranged around the iron core and is located at the periphery of the heat conductive hole, and the coil skeleton is used to install the coil. The heat conductive sheet is arranged on the surface of the iron core, and is used to conduct the local heat generated when the iron core is working to the entire iron core. The heat conductive shaft is interference fit in the heat conductive hole, and the end of the heat conductive shaft passes through the iron core to dissipate the heat of the iron core. The technical solution provided by the present application can solve the problem that the motor size is large and there is no way to make it integrated with the drive motor in the prior art.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor heat dissipation structure and a motor. Background Art

[0002] Existing brushless torque motors have no way to dissipate heat, so the drive and motor are generally installed separately, and there is no way to integrate the drive and motor. At the same time, due to the need to leave space for heat dissipation, the size of the motor is relatively large. Summary of the invention

[0003] The present application provides a motor heat dissipation structure and a motor, which can solve the problem in the prior art that the motor is large in size and there is no way to integrate the drive motor.

[0004] In a first aspect, an embodiment of the present invention provides a motor heat dissipation structure, comprising:

[0005] The iron core is formed with a coil frame and a heat conduction hole. The coil frame is arranged around the iron core and is located outside the heat conduction hole. The coil frame is used to install the coil;

[0006] The heat conducting sheet is arranged on the surface of the iron core and is used to conduct the local heat generated when the iron core is working to the entire iron core;

[0007] The heat-conducting shaft is interference-fitted in the heat-conducting hole, and the end of the heat-conducting shaft passes through the iron core to dissipate the heat of the iron core.

[0008] In the above-mentioned implementation process, when the motor heat dissipation structure is applied to the motor, and when it is working, the iron core generates eddy currents under the alternating magnetic field of the coil, which leads to local heating of the iron core. The heating part is mainly near the coil frame. The heat generated at this position will be quickly conducted and diffused to the entire iron core through the heat conductive sheet, thereby improving the heat dissipation area and heat dissipation efficiency; at the same time, since the heat will diffuse to the entire iron core, the heat can be efficiently dissipated to the outside world in the heat conductive hole through the conduction of the heat conductive shaft, so compared with the prior art, there is no need to design additional heat dissipation space, thereby reducing the size of the motor; at the same time, since the motor heat dissipation structure has a good heat dissipation effect, the motor using the motor heat dissipation structure does not need to limit the performance of the motor to ensure that the motor is not burned out, thereby improving the performance of the motor compared with the prior art. At the same time, the safety of the drive board in the motor can also be guaranteed, so the demand for drive motor integration can be met.

[0009] In an optional embodiment, the heat conductive sheet includes a diffusion area and a coil mounting area corresponding to the coil frame;

[0010] The coil mounting area is aligned with the coil frame to jointly mount the coil;

[0011] The diffusion area is attached to the area between the coil frame and the heat conduction hole on the surface of the core.

[0012] In the above implementation process, the heat conducting sheet and the iron core are installed with the coil together. When the iron core is locally heated due to eddy current, the heat will be better diffused from the coil installation area and the diffusion area to the entire iron core, which is beneficial to the heat dissipation of the iron core.

[0013] In an optional embodiment, the heat conducting sheet extends to the heat conducting hole, and the heat conducting shaft and the heat conducting sheet are interference fit.

[0014] During the above implementation process, the heat conducting plate and the heat conducting shaft have an interference fit, so that the heat conducting plate conducts heat directly to the heat conducting shaft body to lead it to the outside world, which is beneficial to improve the heat dissipation effect of the motor heat dissipation structure, and at the same time, further reduces the risk of the iron core being burned by heat.

[0015] In an optional embodiment, the number of the heat conducting plates is two, and the two heat conducting plates are respectively disposed on two opposite surfaces of the iron core.

[0016] In the above implementation process, two heat conducting plates are used to improve the efficiency of the heat conducting plates in diffusing heat to the entire core, thereby preventing the core from being burned due to slow heat conduction; at the same time, improving the efficiency of heat diffusion can also further improve the performance of the motor.

[0017] In an optional embodiment, the heat-conducting shaft includes a shaft body and a heat conductor embedded in the surface of the shaft body, and the heat conductor extends along the axial direction of the shaft body.

[0018] During the above implementation process, taking into account the balance between manufacturing cost, heat dissipation effect and structural stability, an assembly method of a shaft plus a heat conductor is adopted to ensure that the thermal shaft is stably connected to the iron core and the heat dissipation effect of the thermal shaft is achieved while using less thermally conductive material with good thermal conductivity.

[0019] In an optional embodiment, the number of the heat conductors is three, and the three heat conductors are evenly spaced on the surface of the shaft.

[0020] In the above implementation process, the three heat conductors can conduct heat with the iron core respectively, so as to quickly and efficiently lead out the heat of the iron core, thereby improving the heat dissipation effect of the motor heat dissipation structure.

[0021] In an optional embodiment, the shaft body includes a steel shaft, and the heat conductor includes a copper bar or a copper tube.

[0022] In the above implementation process, the thermal conductivity of copper is 401 W / m·K, which can efficiently lead the heat of the iron core to the outside to ensure that the iron core is not burned.

[0023] In an optional embodiment, a copper ring is disposed at the end of the heat-conducting shaft, the copper ring is interference-fitted with the steel shaft and is in contact with the heat conductor, and the copper ring is used for connecting an external heat dissipation source.

[0024] In the above implementation process, a copper ring is arranged at the end of the heat-conducting shaft to facilitate the heat conductor to transfer heat to the copper ring, and finally transfer the heat to an external heat source, for example, a heat sink.

[0025] In an optional embodiment, the heat conductive sheet is a copper sheet, and the copper sheet is bonded to the surface of the iron core through an insulating material.

[0026] In the above implementation process, the thermal conductivity of copper is 401W / m·K, which can efficiently diffuse the local heat generated by the core to the entire core when the core is working, thereby preventing the core from being burned due to excessive local heat.

[0027] In a second aspect, an embodiment of the present invention provides a motor, comprising:

[0028] End caps;

[0029] Magnet fixing ring;

[0030] magnet;

[0031] coil; and

[0032] The motor heat dissipation structure of any of the aforementioned embodiments;

[0033] The coil is mounted on the coil frame of the iron core;

[0034] The iron core is located in the inner ring of the magnet fixing ring, and a plurality of magnets are arranged on the inner wall of the magnet fixing ring to correspond to the circumference of the iron core;

[0035] The two end covers are located at opposite sides of the iron core and fix the magnet fixing ring, and the end of the heat-conducting shaft passes through the end covers.

[0036] In the above implementation process, the motor has a good heat dissipation effect under the action of the motor heat dissipation structure, ensuring that the iron core is not burned when the motor is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A three-dimensional diagram of the heat dissipation structure of the motor in this embodiment;

[0039] Figure 2 is a cross-sectional view of the heat dissipation structure of the motor in this embodiment;

[0040] Figure 3 Schematic diagram of the heating part of the iron core in this embodiment;

[0041] Figure 4 is an assembly diagram of the iron core and the heat conducting sheet in this embodiment;

[0042] Figure 5 is a three-dimensional diagram of the heat-conducting shaft in this embodiment;

[0043] Figure 6 An assembly diagram of the motor provided in this embodiment;

[0044] Figure 7 A cross-sectional view of the motor provided in this embodiment.

[0045] Icons: 10-iron core; 11-heat conductive sheet; 12-heat conductive shaft; 13-coil skeleton; 14-heat conductive hole; 15-diffusion area; 16-coil installation area; 17-shaft; 18-heat conductive body; 19-copper ring; 20-end cover; 21-magnet fixing ring; 22-magnet; 23-coil. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0048] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0049] In the description of the embodiments of the present application, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0052] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0053] This embodiment provides a motor heat dissipation structure, which can solve the problem in the prior art that the motor is large in size and cannot be integrated with the drive motor.

[0054] See also Figure 1 and Figure 2 , Figure 1 is a three-dimensional diagram of the motor heat dissipation structure in this embodiment, Figure 2 It is a cross-sectional view of the motor heat dissipation structure in this embodiment.

[0055] The heat dissipation structure of the motor includes an iron core 10, a heat conducting sheet 11 and a heat conducting shaft 12. The iron core 10 is formed with a coil frame 13 and a heat conducting hole 14. The coil frame 13 is arranged around the iron core 10 and is located at the periphery of the heat conducting hole 14. The coil frame 13 is used to install the coil 23. The heat conducting sheet 11 is arranged on the surface of the iron core 10 to conduct the local heat generated when the iron core 10 is working to the entire iron core 10. The heat conducting shaft 12 is interference fit in the heat conducting hole 14, and the end of the heat conducting shaft 12 passes through the iron core 10 to dissipate the heat of the iron core 10.

[0056] In the above implementation process, when the motor heat dissipation structure is applied to the motor, and when it is working, the iron core 10 generates eddy current under the alternating magnetic field of the coil 23, which causes local heating of the iron core 10, and the heating part is mainly near the coil frame 13. Figure 3 , Figure 3 is a schematic diagram of the heating part of the iron core 10 in this embodiment. Figure 3 The mark with a box and an arrow in the figure indicates the heating position of the core 10. The heat generated at this position will be quickly conducted and diffused to the entire core 10 through the heat conductive sheet 11, thereby increasing the heat dissipation area and heat dissipation efficiency. At the same time, since the heat will diffuse to the entire core 10, the heat can be efficiently dissipated to the outside through the heat conductive hole 14 and the conduction of the heat conductive shaft 12, so there is no need to design additional heat dissipation space compared with the prior art, thereby reducing the size of the motor; at the same time, since the motor heat dissipation structure has a good heat dissipation effect, the motor using the motor heat dissipation structure does not need to limit the performance of the motor to ensure that the motor does not burn out, thereby improving the performance of the motor compared with the prior art. At the same time, since the heat dissipation problem has been solved, when the motor heat dissipation structure is applied to the motor, the drive board can be built into the motor, which can ensure the safety of the drive board in the motor and meet the needs of driving the motor integration.

[0057] It should be noted that in the present disclosure, the heat conducting hole 14 is coaxial with the core 10, that is, the heat conducting hole 14 is located in the center of the core 10. When the heat conducting sheet 11 diffuses the heat to the entire core 10, the heat can be evenly and simultaneously conducted to the heat conducting hole 14, and finally led to the outside by the heat conducting shaft 12.

[0058] See also Figure 4 , Figure 4 FIG. 1 is an assembly diagram of the iron core 10 and the heat conducting sheet 11 in this embodiment.

[0059] In the present disclosure, the heat conductive sheet 11 includes a diffusion region 15 and a coil mounting region 16 corresponding to the coil skeleton 13 .

[0060] The coil mounting area 16 is aligned with the coil bobbin 13 to mount the coil 23 together.

[0061] The diffusion region 15 is attached to the region between the coil bobbin 13 and the heat conducting hole 14 on the surface of the core 10 .

[0062] During the above implementation process, the heat conductive sheet 11 and the iron core 10 are installed with the coil 23 together. When the iron core 10 is locally heated due to eddy currents, the heat will be better diffused from the coil installation area 16 and the diffusion area 15 to the entire iron core 10, which is beneficial to the heat dissipation of the iron core 10.

[0063] It should be noted that in other specific embodiments, the surface of the core 10 may be concave, and the heat conductive sheet 11 may only include the diffusion area 15 compared with the above technical solution, and the diffusion area 15 is embedded in the concave position of the surface of the core 10, contacting the coil frame 13 of the core 10 and realizing heat conduction.

[0064] In the present disclosure, the heat conducting sheet 11 extends to the heat conducting hole 14 , and the heat conducting shaft 12 is interference fit with the heat conducting sheet 11 .

[0065] During the above implementation process, the heat conducting sheet 11 and the heat conducting shaft 12 are interference fit, so that the heat conducting sheet 11 directly conducts heat to the heat conducting shaft 12 body to lead it to the outside, which is beneficial to improve the heat dissipation effect of the motor heat dissipation structure. At the same time, it also further reduces the risk of the iron core 10 being burned by heat.

[0066] It should be noted that in other specific embodiments, there is no restriction on whether the heat conducting sheet 11 extends to the heat conducting hole 14 . A heat conducting tube can be built into the heat conducting hole 14 . The heat conducting tube and the heat conducting shaft 12 have an interference fit, which can also improve the efficiency of transferring the heat of the iron core 10 to the heat conducting shaft 12 .

[0067] In the present disclosure, the number of the heat conducting plates 11 is two, and the two heat conducting plates 11 are respectively disposed on two opposite surfaces of the iron core 10 .

[0068] In the above implementation process, two heat conducting plates 11 are used to improve the efficiency of the heat conducting plates 11 in diffusing heat to the entire core 10, thereby preventing the core 10 from being burned due to slow heat conduction; at the same time, improving the efficiency of heat diffusion can also further improve the performance of the motor.

[0069] See also Figure 5 , Figure 5 FIG. 1 is a three-dimensional diagram of the heat-conducting shaft 12 in this embodiment.

[0070] The heat-conducting shaft 12 includes a shaft body 17 and a heat-conducting body 18 embedded on the surface of the shaft body 17 . The heat-conducting body 18 extends along the axial direction of the shaft body 17 .

[0071] In the above implementation process, taking into account the balance between manufacturing cost, heat dissipation effect and structural stability, an assembly method of shaft 17 plus heat conductor 18 is adopted to ensure that the heat-conducting shaft 12 is stably connected to the iron core 10 and the heat dissipation effect of the heat-conducting shaft 12 is achieved while using less heat-conducting material with good heat conductivity.

[0072] In the present disclosure, the number of the heat conductors 18 is three, and the three heat conductors 18 are evenly spaced and arranged on the surface of the shaft 17 .

[0073] In the above implementation process, the three heat conductors 18 can respectively conduct heat with the iron core 10 to quickly and efficiently lead out the heat of the iron core 10, thereby improving the heat dissipation effect of the motor heat dissipation structure.

[0074] Exemplarily, the shaft 17 includes a steel shaft, and the heat conductor 18 includes a copper bar or a copper tube. The thermal conductivity of copper is 401 W / m·K. Using copper as a heat conducting medium can efficiently lead the heat of the iron core 10 to the outside to ensure that the iron core 10 is not burned; at the same time, the shaft 17 is made of steel, which is low in cost and is conducive to controlling the manufacturing cost of the entire motor structure.

[0075] It should be noted that in other specific implementations, the entire heat-conducting shaft 12 can be set as a copper shaft.

[0076] It should be noted that, for an actual finished product of a motor heat dissipation structure, the heat conductive sheet 11 described above can also be made of copper to obtain a better thermal conductivity effect. When the core 10 is working, the local heat generated by the core 10 can be quickly diffused to the entire core 10 to avoid the core 10 being burned due to excessive local heat, which is beneficial to the heat dissipation effect of the motor heat dissipation structure.

[0077] The heat conducting sheet 11 is bonded to the iron core 10 via an insulating material.

[0078] Please see again Figure 1 and Figure 5 A copper ring 19 is disposed at the end of the heat-conducting shaft 12. The copper ring 19 is interference-fitted with the steel shaft and is in contact with the heat conductor 18. The copper ring 19 is used for connecting an external heat source.

[0079] In the above implementation process, a copper ring 19 is arranged at the end of the heat-conducting shaft 12, which is conducive to the heat conductor 18 to transfer heat to the copper ring 19, and finally transfer the heat to an external heat source, for example, a heat sink. It should be noted that when the motor heat dissipation structure is applied to the motor, and the motor is mounted on a certain device, the copper ring 19 can be fixed on the device or in contact with the heat sink on the device, so as to quickly transfer the heat generated by the motor when it is working to the device or the heat sink of the device, and finally discharge it to the outside world to ensure the normal operation of the motor.

[0080] See also Figure 6 and Figure 7 , Figure 6 The assembly diagram of the motor provided in this embodiment, Figure 7 A cross-sectional view of the motor provided in this embodiment.

[0081] It should be noted that the present disclosure also provides a motor, which includes an end cover 20, a magnet fixing ring 21, a magnet 22, a coil 23 and the motor heat dissipation structure described above.

[0082] The coil 23 is mounted on the coil frame 13 of the iron core 10. The iron core 10 is in the inner ring of the magnet fixing ring 21, and a plurality of magnets are arranged on the inner wall of the magnet fixing ring 21 to correspond to the circumference of the iron core 10. Two end caps 20 are located on opposite sides of the iron core 10 and fix the magnet fixing ring 21, and the end of the heat conducting shaft 12 passes through the end caps 20.

[0083] During the above implementation process, the motor has a good heat dissipation effect under the action of the motor heat dissipation structure, ensuring that the iron core 10 is not burned when the motor is working; at the same time, since the motor has a good heat dissipation effect, a drive board can be built in to realize the integration of the drive motor and improve the performance of the motor.

[0084] It should be noted that a gap may be formed between the two end covers 20 and the core 10 , so that the heat diffused from the heat conducting sheet 11 to the entire core 10 contacts the air in the gap over a large area, which is beneficial to the heat dissipation of the core 10 .

[0085] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A motor heat dissipation structure, characterized in that: include: An iron core, formed with a coil frame and a heat conduction hole, the coil frame is arranged around the iron core and located at the periphery of the heat conduction hole, and the coil frame is used to install the coil; A heat conducting sheet is provided on the surface of the iron core and is used to conduct local heat generated when the iron core is working to the entire iron core. The heat conducting sheet includes a diffusion area and a coil mounting area corresponding to the coil frame; the coil mounting area is aligned with the coil frame to mount the coil together; The diffusion region is attached to the region between the coil frame and the heat conducting hole on the surface of the core; as well as A heat-conducting shaft is interference-fitted in the heat-conducting hole, and an end of the heat-conducting shaft passes through the iron core to dissipate the heat of the iron core. The heat-conducting shaft includes a shaft body and a heat-conducting body embedded in the surface of the shaft body, and the heat-conducting body extends along the axial direction of the shaft body; Wherein, the heat conducting sheet extends to the heat conducting hole, and the heat conducting shaft is interference fit with the heat conducting sheet.

2. The motor heat dissipation structure according to claim 1, characterized in that: The number of the heat conducting plates is two, and the two heat conducting plates are respectively arranged on two opposite surfaces of the iron core.

3. The motor heat dissipation structure according to claim 1, characterized in that: The number of the heat conductors is three, and the three heat conductors are evenly spaced and arranged on the surface of the shaft.

4. The motor heat dissipation structure according to claim 1, characterized in that: The shaft body comprises a steel shaft, and the heat conductor comprises a copper bar or a copper tube.

5. The motor heat dissipation structure according to claim 4, characterized in that: The end of the heat-conducting shaft is provided with a copper ring, which is interference-fitted with the steel shaft and in contact with the heat conductor, and is used for connecting an external heat dissipation source.

6. The motor heat dissipation structure according to any one of claims 1 to 5, characterized in that: The heat conducting sheet is a copper sheet, and the copper sheet is bonded to the surface of the iron core through an insulating material.

7. A motor, characterized in that: include: End caps; Magnet fixing ring; magnet; Coil; as well as The motor heat dissipation structure according to any one of claims 1 to 6; The coil is mounted on the coil frame of the iron core; The iron core is located in the inner ring of the magnet fixing ring, and a plurality of magnets are arranged on the inner wall of the magnet fixing ring to correspond to the circumference of the iron core; The two end covers are located at opposite sides of the iron core and fix the magnet fixing ring, and the end of the heat-conducting shaft passes through the end covers.

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