Brushless motor stator heat dissipation structure and unmanned aerial vehicle
By using thermally conductive silicone grease to fill the gaps in the stator of the brushless motor and combining it with surface difference design and fixing structure, the problem of poor heat dissipation was solved, resulting in better heat dissipation and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANCHANG SANRUI INTELLIGENT TECH CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-06-19
AI Technical Summary
The heat dissipation structure of existing brushless motor stators has microscopic gaps, which prevents heat from being dissipated in time and results in poor heat dissipation.
Thermal grease is used to fill the gap between the coil and the heat sink, and the contact area is increased through surface difference design. The coil is fixed with screws and coil clamps to prevent movement.
It improves the heat dissipation of the motor, reduces the weight and cost of the motor, and avoids the safety hazards caused by loose coils.
Smart Images
Figure CN224385164U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of motor technology, and in particular relates to a heat dissipation structure for a brushless motor stator and an unmanned aerial vehicle. Background Technology
[0002] In existing technologies, the heat dissipation structure design of brushless motor stators typically has certain limitations. Specifically, current brushless motor stator heat dissipation structures mostly employ a direct rigid connection between the coil and the back cover. While this connection method is structurally simple, gaps inevitably exist between the contact surfaces of the coil and the back cover at a microscopic level. These microscopic gaps hinder effective heat conduction, preventing the heat generated by the motor during operation from being dissipated to the external environment in a timely and efficient manner, thus resulting in poor motor heat dissipation.
[0003] Therefore, how to improve the heat dissipation structure of the brushless motor stator and enhance the motor's heat dissipation effect has become a pressing technical problem to be solved in the current brushless motor technology field. Utility Model Content
[0004] The purpose of this application is to provide a brushless motor stator heat dissipation structure and a drone to solve the above-mentioned technical problems.
[0005] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows:
[0006] In a first aspect, embodiments of this application provide a brushless motor stator heat dissipation structure, including a back cover, multiple heat sinks and a coil. The back cover has multiple slots on its side for mounting multiple heat sinks respectively. There is a surface difference between the outer contour of the heat sink and the outer diameter of the back cover. The surface difference is used to apply thermal grease. The thermal grease is also used to fill the gap between the coil and the heat sink.
[0007] In some embodiments, the outer circumference of the back cover is provided with multiple venting grooves to expel excess air and thermal grease.
[0008] In some embodiments, a matching slot is provided between the back cover and the coil to prevent radial movement of the coil during motor operation.
[0009] In some embodiments, mounting holes for mounting screws are provided on both sides of the slot and the heat sink.
[0010] In some embodiments, a coil pressure plate is also provided on one side of the screw to prevent the coil from moving axially during motor operation.
[0011] In some embodiments, the brushless motor stator heat dissipation structure includes four heat sinks, which are spaced apart.
[0012] Secondly, embodiments of this application provide a drone, including the brushless motor stator heat dissipation structure provided in the first aspect above.
[0013] Compared with the prior art, the beneficial effects of the embodiments of this application are:
[0014] This application provides a brushless motor stator heat dissipation structure and a drone. By applying thermally conductive silicone grease to the surface and filling the gap between the coil and the heat sink with the thermally conductive silicone grease, the problem of insufficient contact between the two at the microscopic level is solved, thereby improving the heat dissipation effect of the motor. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 A schematic diagram of a heat dissipation structure for a brushless motor stator provided in an embodiment of this application is shown.
[0017] Figure 2 An exploded view of a brushless motor stator heat dissipation structure provided in an embodiment of this application is shown.
[0018] Figure 3 A schematic diagram of the coil structure provided in an embodiment of this application is shown.
[0019] Figure 4 This illustration shows a schematic diagram of the structure of a brushless motor stator heat dissipation structure after the coil is hidden, according to an embodiment of this application.
[0020] Figure 5 It shows Figure 4 Exploded view.
[0021] Figure 6 It shows Figure 4 Another exploded view.
[0022] Figure 7 A schematic diagram of the structure of the back cover provided in an embodiment of this application is shown.
[0023] Figure 8 A schematic diagram of the exhaust channel provided in an embodiment of this application is shown.
[0024] Illustration:
[0025] 10. Coil; 11. First slot; 20. Back cover; 21. Second slot; 22. Vent slot; 23. Mounting hole; 24. Slot; 30. Heat sink; 40. Coil pressure plate; 50. Screw; 60. Surface difference. Detailed Implementation
[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0028] 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 application, "multiple" means two or more, unless otherwise explicitly specified.
[0029] To illustrate the technical solution described in this application, specific embodiments are provided below.
[0030] Please see Figures 1 to 8 As shown in the figure, this application embodiment provides a brushless motor stator heat dissipation structure, including a rear cover 20, multiple heat sinks 30 and a coil 10.
[0031] The back cover 20 has multiple slots 24 on its side for mounting multiple heat sinks 30. There is a surface difference 60 between the outer contour of the heat sink 30 and the outer diameter of the back cover 20. Specifically, since the outer diameter of the heat sink 30 is smaller than the outer diameter of the back cover 20, there is a height difference between its outer contour and the back cover 20, which results in the surface difference 60. This surface difference 60, which exists after the heat sink 30 is assembled, is used for applying thermal grease.
[0032] Thermal grease is also used to fill the gap between coil 10 and heat sink 30. For example, after coil 10 is pressed in, by pushing heat sink 30 outward, thermal grease fills the gap between coil 10 and heat sink 30, thus solving the problem of insufficient contact between the two at the microscopic level.
[0033] Since the thermal conductivity of thermal grease is better than that of the material of the back cover 20 itself, it can better transfer heat to the heat sink 30 and quickly remove heat during operation, thus improving the heat dissipation effect of the motor.
[0034] The above-mentioned brushless motor stator heat dissipation structure improves the motor's heat dissipation effect by applying thermal grease to the surface difference 60 and filling the gap between the coil 10 and the heat sink 30 with the thermal grease.
[0035] In some embodiments of this application, the outer circumference of the back cover 20 is provided with multiple venting grooves 22 for discharging excess air and thermal grease.
[0036] In some embodiments of this application, a matching slot, such as a first slot 11 and a second slot 21, is provided between the back cover 20 and the coil 10 to prevent the coil 10 from moving radially during motor operation.
[0037] In some embodiments of this application, mounting holes 23 for mounting screws 50 are provided on both sides of the slot 24 and the heat sink 30.
[0038] In some embodiments of this application, one of the screws 50 is also fitted with a coil pressure plate 40 to prevent the coil 10 from moving axially during motor operation.
[0039] In the above embodiments, by avoiding axial and radial movement of the coil 10, the safety hazards caused by the loosening of the coil 10 during motor operation are resolved.
[0040] Therefore, after the heat sink 30 is tightened, the coil pressure plate 40 is installed on the rear cover 20, and the heat sink 30 and the coil pressure plate 40 are fixed by screws 50 to prevent the heat sink 30 from retracting. Screws 50 are also installed on the opposite side, and both serve the same purpose.
[0041] In some embodiments of this application, the brushless motor stator heat dissipation structure includes four spaced heat sinks 30.
[0042] In summary, the brushless motor stator heat dissipation structure provided in this application embodiment has better heat dissipation effect, lower cost, and lighter motor weight.
[0043] In other embodiments of this application, a drone is also provided, which includes the brushless motor stator heat dissipation structure provided in any of the above embodiments, and also has the above-mentioned beneficial effects.
[0044] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A heat dissipation structure for a brushless motor stator, characterized in that, The device includes a back cover, multiple heat sinks, and a coil. The back cover has multiple slots on its side for mounting the heat sinks. There is a surface difference between the outer contour of the heat sink and the outer diameter of the back cover. This surface difference is used to apply thermal grease. The thermal grease is also used to fill the gap between the coil and the heat sink.
2. The heat dissipation structure of a brushless motor stator according to claim 1, characterized in that, The outer circumference of the rear cover is provided with multiple venting grooves to expel excess air and the thermal grease.
3. The heat dissipation structure of a brushless motor stator according to claim 1, characterized in that, A matching slot is provided between the rear cover and the coil to prevent radial movement of the coil during motor operation.
4. The heat dissipation structure of a brushless motor stator according to claim 1, characterized in that, Both the slot and the heat sink have mounting holes on both sides for installing screws.
5. The heat dissipation structure of a brushless motor stator according to claim 4, characterized in that, One of the screws also has a coil clamping plate inserted to prevent the coil from moving axially during motor operation.
6. The heat dissipation structure of a brushless motor stator according to claim 1, characterized in that, It includes four heat sinks, which are spaced apart.
7. A drone, characterized in that, Includes a brushless motor stator heat dissipation structure as described in any one of claims 1 to 6.