Motor assembly and drone

Abstract

The present disclosure relates to a motor assembly and an unmanned aerial vehicle (UAV). The motor assembly includes a motor body, an electronic speed regulator, a mounting housing, a heat-conducting structure, a first heat-insulating structure, and a second heat-insulating structure. The electronic speed regulator is used to adjust the rotational speed of the motor body. The mounting housing includes a mounting seat with an opening and a heat-dissipating cover covering the opening. The heat-dissipating cover and the mounting seat together form an installation space for installing the electronic speed regulator. The motor body is located outside the installation space and connected to the mounting seat. The heat-conducting structure is connected between the heat-dissipating cover and the electronic speed regulator to conduct heat from the electronic speed regulator to the heat-dissipating cover. The first heat-insulating structure is located between the contact surface of the electronic speed regulator and the mounting seat to isolate heat transfer between the mounting seat and the electronic speed regulator. The second heat-insulating structure is located between the contact surface of the mounting seat and the heat-dissipating cover to isolate heat transfer between the mounting seat and the heat-dissipating cover. The electronic speed regulator and the motor body dissipate heat through the heat-dissipating cover and the mounting seat, respectively, to achieve independent heat dissipation of the two.

Description

Technical Field

[0001] The present disclosure relates to the technical field of drive devices, and in particular, to a motor assembly and an unmanned aerial vehicle. Background Art

[0002] Typically, the drive unit in a drone includes a motor assembly that integrates a motor and an electronic speed controller. The motor's windings generate significant heat during operation, which is transferred through the motor base to the components of the electronic speed controller. Because the maximum temperature the electronic speed controller components can withstand is lower than the maximum temperature the motor can withstand, the motor's temperature rises rapidly during operation, transferring a large amount of heat through the motor base to the electronic speed controller, causing the electronic speed controller's temperature to rise rapidly as well. When the temperature exceeds the maximum temperature the electronic speed controller components can withstand, the electronic speed controller can be damaged and fail, affecting the performance of the motor assembly and increasing costs. When a drone uses a motor assembly as its power unit, to ensure the unit's service life, the drone must wait until the temperature drops to within a normal range between takeoffs and landings before continuing to operate. This shortens the drone's flight time, reduces flight frequency, and decreases flight efficiency. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a motor assembly and a drone to solve the related problems existing in the prior art.

[0004] In order to achieve the above objectives, the present disclosure provides a motor assembly, comprising:

[0005] Motor body;

[0006] An electronic speed regulator, used for adjusting the speed of the motor body;

[0007] The mounting housing includes a mounting base having an opening and a heat dissipation cover covering the opening, wherein the heat dissipation cover and the mounting base together form an installation space for installing the electronic speed regulator, and the motor body is located outside the installation space and connected to the mounting base;

[0008] a heat-conducting structure connected between the heat dissipation cover and the electronic speed regulator to conduct heat from the electronic speed regulator to the heat dissipation cover;

[0009] a first heat-insulating structure, located between the contact surface of the electronic speed regulator and the mounting base, to isolate heat transfer between the mounting base and the electronic speed regulator;

[0010] The second heat-insulating structure is located between the contact surface of the mounting base and the heat-dissipating cover to isolate heat transfer between the mounting base and the heat-dissipating cover.

[0011] Optionally, the electronic speed regulator includes an electric adjustment board and a field effect tube, the electric adjustment board is connected to the mounting seat, the first thermal insulation structure is located between the contact surface of the electric adjustment board and the mounting seat, the field effect tube is arranged on the electric adjustment board, the heat conductive structure includes a heat conductive sheet and a heat conductive boss formed on the heat dissipation cover, the heat conductive boss extends from the heat dissipation cover toward the field effect tube, a part of the heat conductive sheet is clamped between the end of the heat conductive boss away from the heat dissipation cover and the field effect tube, and the other part of the heat conductive sheet is attached to the side wall of the heat conductive boss and is in thermal contact with the heat dissipation cover.

[0012] Optionally, the thermal conductive sheet includes a metal thermal conductive sheet and a temperature-averaging thermal conductive sheet, the temperature-averaging thermal conductive sheet includes a first part, a second part and a third part, the first part is clamped between the metal thermal conductive sheet and the field effect tube, the side of the metal thermal conductive sheet facing away from the first part is in thermal contact with the thermal conductive boss, the second part is attached to the side wall of the thermal conductive boss, and the third part is attached to the inner surface of the heat dissipation cover.

[0013] Optionally, the heat-conducting boss is formed as an annular heat-conducting boss, and the second portion is attached to at least a portion of a side wall of the annular heat-conducting boss.

[0014] Optionally, a thermal pad made of thermal interface material is provided between the thermal conductive sheet and the field effect tube.

[0015] Optionally, the mounting seat includes a mounting seat body and a first mounting boss formed on the mounting seat body, a first threaded hole is formed on the first mounting boss, a first bolt passes through the electronic speed regulator and is threadedly connected to the first threaded hole to fasten the electronic speed regulator to the first mounting boss, and the first thermal insulation structure includes a first thermal insulation pad, which is clamped between the electronic speed regulator and the first mounting boss.

[0016] Optionally, the mounting seat includes a mounting seat body and a second mounting boss formed on the mounting seat body, a second threaded hole is formed on the second mounting boss, a second bolt passes through the heat dissipation cover and is threadedly connected to the second threaded hole to fasten the heat dissipation cover to the second mounting boss, and the second thermal insulation structure includes a second thermal insulation pad, which is clamped between the heat dissipation cover and the second mounting boss.

[0017] Optionally, the second thermal insulation structure further includes a thermal insulation sealing ring, which is clamped between the heat dissipation cover and the mounting seat body.

[0018] Optionally, an annular protrusion is formed on one of the mounting seat body and the heat dissipation cover, and an annular groove is formed on the other of the mounting seat body and the heat dissipation cover, the cross-sections of the annular groove and the thermal insulation sealing ring are both U-shaped, and the thermal insulation sealing ring is clamped between the annular protrusion and the annular groove.

[0019] The present disclosure also provides a drone, comprising the above-mentioned motor assembly.

[0020] Through the above technical solution, the first thermal insulation structure can isolate the heat transfer between the mounting base and the electronic speed controller, preventing the heat of the motor body from being transferred to the electronic speed controller through the mounting base. The second thermal insulation structure can isolate the heat transfer between the mounting base and the heat dissipation cover, preventing the heat of the motor body from being transferred to the heat dissipation cover through the mounting base. The heat generated by the electronic speed controller during operation can be transferred to the heat dissipation cover through the heat conductive structure. The heat dissipation cover can dissipate the heat generated by the electronic speed controller, so that the temperature of the electronic speed controller can always be maintained within an acceptable temperature range, preventing the performance of the electronic speed controller from being unstable or failing due to temperature increase, and ensuring that the motor assembly can operate stably.

[0021] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0023] Figure 1 is a perspective view of a motor assembly provided by an exemplary embodiment of the present disclosure;

[0024] Figure 2 It is along Figure 1 Cross-section taken along line "AA";

[0025] Figure 3 yes Figure 2 Enlarged view of part "B" in the figure;

[0026] Figure 4 yes Figure 2 Enlarged view of section "C";

[0027] Figure 5 is a perspective view of a heat dissipation cover and a heat conduction structure of a motor assembly provided by an exemplary embodiment of the present disclosure;

[0028] Figure 6 is a perspective view of a heat conducting sheet, a heat conducting pad, and a field effect tube of a motor assembly provided by an exemplary embodiment of the present disclosure;

[0029] Figure 7 is a perspective view of a thermally conductive sheet and a thermally conductive pad of a motor assembly provided by an exemplary embodiment of the present disclosure;

[0030] Figure 8 is a perspective view of a heat conducting sheet of a motor assembly provided by an exemplary embodiment of the present disclosure;

[0031] Figure 9 1 is a perspective view of an electronic speed regulator and a mounting base of a motor assembly provided by an exemplary embodiment of the present disclosure.

[0032] Description of Reference Numerals

[0033] 1-motor body; 2-electronic speed regulator; 21-electric adjustment board; 22-field effect transistor; 3-mounting shell; 31-mounting seat; 311-mounting seat body; 312-first mounting boss; 313-first bolt; 314-second mounting boss; 315-second bolt; 316-annular protrusion; 32-heat dissipation cover; 321-annular groove; 4-thermal conductive structure; 41-thermal conductive plate; 42-metal thermal conductive plate; 43-temperature uniform thermal conductive plate; 431-first part; 432-second part; 433-third part; 44-thermal conductive boss; 45-thermal conductive pad; 5-first thermal insulation structure; 51-first thermal insulation pad; 6-second thermal insulation structure; 61-second thermal insulation pad; 62-thermal insulation sealing ring. DETAILED DESCRIPTION

[0034] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0035] In this disclosure, unless otherwise indicated, directional terms such as "inside" and "outside" refer to the interior and exterior of a component or structure relative to its outline. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not convey sequential or significant meanings. Furthermore, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same element.

[0036] According to one aspect of the present disclosure, Figures 1 to 9As shown, the present disclosure provides a motor assembly, which includes a motor body 1, an electronic speed regulator 2, a mounting housing 3, a heat-conducting structure 4, a first heat-insulating structure 5, and a second heat-insulating structure 6. The electronic speed regulator 2 is used to adjust the speed of the motor body 1. The mounting housing 3 includes a mounting seat 31 having an opening and a heat-dissipating cover 32 covering the opening. The heat-dissipating cover 32 and the mounting seat 31 together form an installation space for installing the electronic speed regulator 2. The motor body 1 is located outside the installation space and is connected to the mounting seat 31. The heat-conducting structure 4 is connected between the heat-dissipating cover 32 and the electronic speed regulator 2 to conduct heat from the electronic speed regulator 2 to the heat-dissipating cover 32. The first heat-insulating structure 5 is located between the contact surface of the electronic speed regulator 2 and the mounting seat 31 to isolate heat transfer between the mounting seat 31 and the electronic speed regulator 2. The second heat-insulating structure 6 is located between the contact surface of the mounting seat 31 and the heat-dissipating cover 32 to isolate heat transfer between the mounting seat 31 and the heat-dissipating cover 32.

[0037] In the above motor assembly, if Figure 2 As shown, the electronic speed controller 2 is mounted in the mounting space enclosed by the mounting base 31 and the heat dissipation cover 32, and the motor body 1 is mounted on the mounting base 31. The heat generated by the motor body 1 during operation is transferred to the mounting base 31. Since the first thermal insulation structure 5 is located between the contact surface of the electronic speed controller 2 and the mounting base 31, it can isolate the heat transfer between the mounting base 31 and the electronic speed controller 2, thereby preventing the heat of the motor body 1 from being transferred through the mounting base 31 to the electronic speed controller 2 installed in the mounting base 31. The second thermal insulation structure 6 is located between the contact surface of the mounting base 31 and the heat dissipation cover 32, thereby isolating the heat from the mounting base 31 and the heat dissipation cover 32, thereby preventing the heat of the motor body 1 from being transferred through the mounting base 31 to the heat dissipation cover 32 and then being transferred to the electronic speed controller 2 through the heat dissipation cover 32 and the heat conductive structure 4. The heat generated by the electronic speed controller 2 during operation can be transferred to the heat dissipation cover 32 through the heat-conducting structure 4. The heat dissipation cover 32 can dissipate the heat of the electronic speed controller 2, so that the temperature of the electronic speed controller 2 can always be maintained within a tolerable temperature range, preventing the performance of the electronic speed controller 2 from becoming unstable or failing due to temperature increase, and ensuring that the motor assembly can operate stably.

[0038] Through the above technical solution, the heat generated by the motor body 1 can be transferred to the mounting base 31, and the heat of the motor body 1 can be dissipated to the outside atmosphere through itself and the mounting base 31. The heat generated by the electronic speed regulator 2 is transferred to the heat dissipation cover 32 through the heat conducting structure 4 and dissipated to the outside atmosphere through the heat dissipation cover. The first thermal insulation structure 5 can isolate the heat transfer between the mounting base 31 and the electronic speed regulator 2, thereby preventing the heat of the motor body 1 from being transferred to the electronic speed regulator 2 through the mounting base 31. The second thermal insulation structure 6 can isolate the heat transfer between the mounting base 31 and the heat dissipation cover 32, thereby preventing the heat of the motor body 1 from being transferred to the electronic speed regulator 2 through the mounting base 31, the heat dissipation cover 32, and the heat conducting structure 4, thereby affecting the temperature of the electronic speed regulator 2. That is to say, the motor assembly provided by the present invention can achieve independent heat dissipation of the electronic speed regulator 2 and the motor body 1, and no heat will be transferred between the electronic speed regulator 2 and the motor body 1, thereby preventing the heat of the electronic speed regulator and the motor body 1 from affecting each other, so that the temperature of the electronic speed regulator 2 can always be maintained within its tolerable temperature range, preventing the performance of the electronic speed regulator 2 from being unstable or failing due to the influence of the temperature of the motor body 1, and ensuring that the motor assembly can work stably.

[0039] The motor body 1 can be mounted anywhere on the mounting base 31. Optionally, in one exemplary embodiment of the present disclosure, the motor body 1 is mounted on a side of the mounting base 31 away from the mounting space, i.e., the motor body 1 is located below the mounting space. Furthermore, the motor body 1 can be fixedly connected to the mounting base 31 by welding or detachably connected to the mounting base 31 by bolts. The present disclosure does not impose any specific restrictions on the connection method between the motor body 1 and the mounting base 31.

[0040] In order to ensure that the heat dissipation cover 32 has good heat dissipation efficiency, optionally, a plurality of heat sinks can be formed on the heat dissipation cover 32, and the plurality of heat sinks are used to increase the contact area between the heat dissipation cover 32 and the air, thereby quickly dissipating the heat generated by the electronic speed regulator 2.

[0041] The electronic speed regulator 2 is installed in the installation space enclosed by the mounting base 31 and the heat dissipation cover 32. During operation, the main heat source of the electronic speed regulator 2 is the electronic components in the electronic speed regulator. Electronic speed regulators 2 of different structures have different types of heat-generating components, such as thyristors or field-effect transistors. As an exemplary embodiment, Figure 2 、 Figure 3 as well as Figures 6 to 8As shown, the electronic speed regulator 2 may include an electric adjustment board 21 and a field effect tube 22, the electric adjustment board 21 is connected to the mounting base 31, the first thermal insulation structure 5 is located between the contact surface of the electric adjustment board 21 and the mounting base 31, the field effect tube 22 is arranged on the electric adjustment board 21, and the heat conduction structure 4 includes a heat conduction plate 41 and a heat conduction boss 44 formed on the heat dissipation cover 32, the heat conduction boss 44 extends from the heat dissipation cover 32 toward the field effect tube 22, a part of the heat conduction plate 41 is clamped between the end of the heat conduction boss 44 away from the heat dissipation cover 32 and the field effect tube 22, and the other part of the heat conduction plate 41 is attached to the side wall of the heat conduction boss 44 and is in thermal contact with the heat dissipation cover 32.

[0042] In the above embodiment, the first thermal insulation structure 5 is disposed between the contact surface of the electric adjustment board 21 and the mounting base 31, thereby preventing heat from the motor body 1 from being transferred through the mounting base 31 to the electric adjustment board 21 and, in turn, to the field-effect transistor 22. Because a portion of the thermal conductive sheet 41 is clamped between the end of the thermal conductive boss 44 away from the heat dissipation cover 32 and the field-effect transistor 22, heat from the field-effect transistor 22 can be transferred through the portion of the thermal conductive sheet 41 to the thermal conductive boss 44 and, in turn, to the heat dissipation cover 32. Because another portion of the thermal conductive sheet 41 is attached to the sidewall of the thermal conductive boss 44 and in thermal contact with the heat dissipation cover 32, this portion of the thermal conductive sheet 41 can transfer heat directly to the heat dissipation cover 32, thereby increasing the heat conduction area of ​​the thermal conductive sheet 41 and improving the heat conduction efficiency between the thermal conductive sheet 41 and the heat dissipation cover 32. That is to say, the heat of the field effect tube 22 can be transferred to the heat dissipation cover 32 at the same time through the heat conduction boss 44 and the part of the heat conduction sheet 41 attached to the heat conduction boss 41, thereby improving the heat conduction efficiency between the field effect tube 22 and the heat dissipation cover 32, and can quickly dissipate the heat of the field effect tube 22, thereby preventing the heat of the field effect tube 22 from accumulating in the installation space and causing the temperature to rise.

[0043] In order to further increase the thermal conductivity between the field effect tube 22 and the heat dissipation cover 32, optionally, the thermal conductive sheet 41 may include a metal thermal conductive sheet 42 and a temperature-uniform thermal conductive sheet 43. The temperature-uniform thermal conductive sheet 43 includes a first part 431, a second part 432 and a third part 433. The first part 431 is clamped between the metal thermal conductive sheet 42 and the field effect tube 22. The side of the metal thermal conductive sheet 42 facing away from the first part 431 is in thermal contact with the thermal conductive boss 44. The second part 432 is attached to the side wall of the thermal conductive boss 44. The third part 433 is attached to the inner surface of the heat dissipation cover 32.

[0044] It should be noted that the above-mentioned temperature-averaging thermal conductive sheet 43 refers to a thermal conductive sheet made of a temperature-averaging material. The temperature-averaging material specifically refers to a material with high thermal conductivity (approximately 3-5 times that of pure copper) along the planar direction of the material, which is conducive to eliminating local high-temperature hot spots and quickly dissipating heat in a limited space. In the present disclosure, the temperature-averaging thermal conductive sheet 43 can be nano-carbon copper foil or graphite sheet. The metal thermal conductive sheet 42 can be made of a metal material with a high thermal conductivity coefficient, such as aluminum, aluminum alloy, copper, etc.

[0045] like Figure 3 、 Figure 5 and Figure 6 As shown, in the above embodiment, the first part 431 of the temperature-averaging heat conductive sheet 43 is clamped between the metal heat conductive sheet 42 and the field effect tube 22. The first part 431 can absorb the heat generated by the field effect tube 22. While transferring the absorbed heat to the metal heat conductive sheet 42 and then to the heat dissipation cover 32 through the heat conductive boss 41, the first part 431 can also transfer the heat along its planar direction to the second part 432 and the third part 433, thereby quickly transferring the heat to the heat dissipation cover 32 along the planar direction of the second part 432 and the third part 433, thereby achieving the purpose of quickly transferring the heat generated by the field effect tube 22 to the heat dissipation cover 32, thereby ensuring the functional stability of the electronic speed controller 2.

[0046] Optionally, the metal heat conductive sheet 42 can be fixed to the end of the heat conductive boss 44 away from the heat dissipation cover 32 by welding, bonding, or other methods. In one embodiment provided in the present disclosure, a mounting through-hole can be formed on the metal heat conductive sheet 42, and a boss threaded hole can be formed on the end of the heat conductive boss 44 away from the heat dissipation cover 32. A thermal conductive fastener can be inserted through the mounting through-hole and the boss threaded hole to fasten the metal heat conductive sheet 42 to the heat conductive boss 44. The present disclosure does not limit the connection method between the metal heat conductive sheet 42 and the heat conductive boss 44.

[0047] When the motor assembly is used, it is usually necessary to connect the electronic speed regulator 2 to the controller so that the electronic speed regulator 2 can be controlled by the controller to adjust the speed of the motor body 1. The electronic speed regulator 2 and the controller can be connected by a wiring harness. To facilitate the layout of the wiring harness, the heat-conducting boss 44 can optionally be formed into an annular heat-conducting boss, and the second portion 432 is attached to at least a portion of the side wall of the annular heat-conducting boss. Since the heat-conducting boss 44 is an annular heat-conducting boss, on the one hand, the contact area between the heat-conducting boss 44 and the heat-conducting plate 4 can be further increased. On the other hand, the space enclosed by the side wall of the heat-conducting boss 44, the heat-conducting plate 4, and the heat dissipation cover 32 can be used to accommodate the wiring harness, thereby reducing the volume of the motor assembly and improving the integration of the motor assembly.

[0048] Here, the above-mentioned annular heat-conducting boss does not limit the annular heat-conducting boss to be formed into a circular ring shape, but mainly refers to the cross-section of the annular heat-conducting boss being a closed cross-section. The annular heat-conducting boss can be formed into a circular ring shape, a rectangular ring shape or a polygonal ring shape, etc., and the present disclosure does not limit this.

[0049] To improve the heat exchange efficiency between the thermally conductive sheet 41 and the field-effect transistor 22, a thermally conductive pad 45 made of a thermal interface material can optionally be provided between the thermally conductive sheet 41 and the field-effect transistor 22. The thermal interface material can be a variety of materials, such as thermally conductive silicone, silicone grease, and heat sink pads. The thermally conductive pad 45 made of thermal interface material can fill the air gap between the thermally conductive sheet 41 and the field-effect transistor 22, reducing the contact thermal resistance between the thermally conductive sheet 41 and the field-effect transistor 22, thereby improving heat dissipation efficiency.

[0050] There are many ways to connect the electronic speed regulator 2 and the mounting base 31. Figure 3 and Figure 9 As shown, the mounting base 31 may include a mounting base body 311 and a first mounting boss 312 formed on the mounting base body 311. A first threaded hole is formed on the first mounting boss 312. A first bolt 313 passes through the electronic speed controller 2 and is threadedly connected to the first threaded hole to fasten the electronic speed controller 2 to the first mounting boss 312. The first thermal insulation structure 5 includes a first thermal insulation pad 51, which is clamped between the electronic speed controller 2 and the first mounting boss 312. Since the electronic speed controller 2 is fastened to the first mounting boss 312, the first thermal insulation pad 51 is provided between the electronic speed controller 2 and the first mounting boss 312. The first thermal insulation pad 51 can block heat exchange between the electronic speed controller 2 and the first mounting boss 312, thereby preventing heat from being transferred to the electronic speed controller 2 through the first mounting boss 312. At the same time, there is no direct contact between the electronic speed regulator 2 and the mounting base body 311, and there is an air gap between the electronic speed regulator 2 and the mounting base body 311. Due to the low heat transfer efficiency of air, the heat transfer between the mounting base body 311 and the electronic speed regulator 2 can be reduced, thereby avoiding the electronic speed regulator 2 from being affected by the motor body 1 and generating temperature rise, ensuring that the temperature of the electronic speed regulator 2 is within a normal range.

[0051] For an embodiment in which the electronic speed regulator 2 includes an electric adjustment board 21 and a field effect tube 22, a first mounting hole can be formed on the electric adjustment board 21, and a first bolt 313 passes through the first mounting hole on the electric adjustment board 21 and is threadedly connected to the first threaded hole to fasten the electric adjustment board 21 to the first mounting boss 312.

[0052] Optionally, in order to further reduce the heat exchange efficiency between the electronic speed regulator 2 and the mounting base 31 , the first bolt 313 may be a nylon screw or a steel screw with relatively low thermal conductivity.

[0053] In other embodiments, the electronic speed regulator 2 may be directly connected to the mounting base 31 via bolts or a clamping structure. For this embodiment, the first thermal insulation pad 51 may be clamped between the electronic speed regulator 2 and the inner surface of the mounting base 31 .

[0054] Since the heat dissipation cover 32 and the mounting base 31 jointly form an installation space for mounting the electronic speed controller 2, in order to facilitate installation and removal between the heat dissipation cover 32 and the mounting base 31, the mounting base 31 may optionally include a mounting base body 311 and a second mounting boss 314 formed on the mounting base body 311. The second mounting boss 314 is formed with a second threaded hole. A second bolt 315 passes through the heat dissipation cover 32 and is threadedly connected to the second threaded hole to fasten the heat dissipation cover 32 to the second mounting boss 314. The second thermal insulation structure 6 includes a second thermal insulation pad 61, which is clamped between the heat dissipation cover 32 and the second mounting boss 314. The second thermal insulation pad 61 can block heat exchange between the heat dissipation cover 32 and the second mounting boss 314, thereby preventing heat from the motor body 1 from being transferred to the heat dissipation cover 32 through the second mounting boss 314, and then to the electronic speed controller 2.

[0055] Optionally, in order to further reduce the heat exchange efficiency between the heat dissipation cover 32 and the mounting base 31 , the second bolt 315 may be a nylon screw or a steel screw with relatively low thermal conductivity.

[0056] Since the heat dissipation cover 32 covers the opening of the mounting base 31, in order to ensure waterproof sealing and heat insulation between the heat dissipation cover 32 and the mounting base 31, as shown in FIG. Figure 4 As shown, the second thermal insulation structure 6 may further include a thermal insulation sealing ring 62, which is clamped between the heat dissipation cover 32 and the mounting seat body 311. The thermal insulation sealing ring 62 can isolate the heat dissipation cover 32 and the mounting seat 31 from heat exchange, and at the same time, can seal the internal space of the mounting seat 31 to prevent external liquid or dust from entering the mounting seat 31 through the connection between the heat dissipation cover 32 and the mounting seat 31, thereby preventing the electronic speed controller 2 from being damaged or malfunctioning due to the influence of external liquid or dust.

[0057] In the above embodiment including the thermal insulation seal ring 62, as shown in FIG. Figure 5 and Figure 9 As shown, optionally, an annular protrusion 316 is formed on one of the mounting seat body 311 and the heat dissipation cover 32, and an annular groove 321 is formed on the other of the mounting seat body 311 and the heat dissipation cover 32. The cross-sections of the annular groove 321 and the thermal insulation sealing ring 62 are both U-shaped, and the thermal insulation sealing ring 62 is clamped between the annular protrusion 316 and the annular groove 321, thereby increasing the contact area between the thermal insulation sealing ring 62 and the mounting seat body 311 and the heat dissipation cover 32, thereby achieving a good sealing effect.

[0058] According to another aspect of the present disclosure, the present disclosure also provides a drone, comprising the above-mentioned motor assembly.

[0059] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0060] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0061] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A motor assembly, characterized in that: include: Motor body (1); An electronic speed regulator (2) for adjusting the rotational speed of the motor body (1); A mounting housing (3) includes a mounting seat (31) having an opening and a heat dissipation cover (32) covering the opening, wherein the heat dissipation cover (32) and the mounting seat (31) together form a mounting space for mounting the electronic speed regulator (2), and the motor body (1) is located outside the mounting space and connected to the mounting seat (31); a heat-conducting structure (4) connected between the heat dissipation cover (32) and the electronic speed regulator (2) to conduct heat from the electronic speed regulator (2) to the heat dissipation cover (32); A first heat-insulating structure (5) is located between the contact surface of the electronic speed regulator (2) and the mounting seat (31) to isolate heat transfer between the mounting seat (31) and the electronic speed regulator (2); A second heat-insulating structure (6) is located between the contact surface of the mounting seat (31) and the heat dissipation cover (32) to isolate heat transfer between the mounting seat (31) and the heat dissipation cover (32); The electronic speed regulator (2) comprises an electric adjustment plate (21) and a field effect tube (22), the electric adjustment plate (21) is connected to the mounting seat (31), the first heat insulating structure (5) is located between the contact surface of the electric adjustment plate (21) and the mounting seat (31), the field effect tube (22) is arranged on the electric adjustment plate (21), the heat conducting structure (4) comprises a heat conducting plate (41) and a heat conducting boss (44) formed on the heat dissipation cover (32), the heat conducting boss (44) extends from the heat dissipation cover (32) toward the field effect tube (22), a part of the heat conducting plate (41) is clamped between an end of the heat conducting boss (44) away from the heat dissipation cover (32) and the field effect tube (22), and another part of the heat conducting plate (41) is attached to the side wall of the heat conducting boss (44) and is in heat conduction contact with the heat dissipation cover (32); The mounting seat (31) includes a mounting seat body (311) and a second mounting boss (314) formed on the mounting seat body (311), a second threaded hole being formed on the second mounting boss (314), a second bolt (315) passing through the heat dissipation cover (32) and being threadedly connected to the second threaded hole to fasten the heat dissipation cover (32) to the second mounting boss (314), and the second thermal insulation structure (6) includes a second thermal insulation pad (61), and the second thermal insulation pad (61) is clamped between the heat dissipation cover (32) and the second mounting boss (314).

2. The motor assembly according to claim 1, characterized in that: The heat conducting sheet (41) includes a metal heat conducting sheet (42) and a temperature-averaging heat conducting sheet (43), and the temperature-averaging heat conducting sheet (43) includes a first portion (431), a second portion (432), and a third portion (433). The first portion (431) is clamped between the metal heat conducting sheet (42) and the field effect tube (22). The side of the metal heat conducting sheet (42) facing away from the first portion (431) is in heat-conducting contact with the heat conducting boss (44). The second portion (432) is attached to the side wall of the heat conducting boss (44), and the third portion (433) is attached to the inner surface of the heat dissipation cover (32).

3. The motor assembly according to claim 2, characterized in that: The heat-conducting boss (44) is formed as an annular heat-conducting boss, and the second portion (432) is attached to at least a portion of the side wall of the annular heat-conducting boss.

4. The motor assembly according to any one of claims 1 to 3, characterized in that: A thermal pad (45) made of thermal interface material is provided between the thermal conductive sheet (41) and the field effect tube (22).

5. The motor assembly according to claim 1 or 2, characterized in that: The mounting seat (31) includes a mounting seat body (311) and a first mounting boss (312) formed on the mounting seat body (311), a first threaded hole being formed on the first mounting boss (312), a first bolt (313) passing through the electronic speed regulator (2) and being threadedly connected to the first threaded hole to fasten the electronic speed regulator (2) to the first mounting boss (312), and the first thermal insulation structure (5) includes a first thermal insulation pad (51), and the first thermal insulation pad (51) is clamped between the electronic speed regulator (2) and the first mounting boss (312).

6. The motor assembly according to claim 1, characterized in that: The second heat-insulating structure (6) further comprises a heat-insulating sealing ring (62), wherein the heat-insulating sealing ring (62) is clamped between the heat-dissipating cover (32) and the mounting seat body (311).

7. The motor assembly according to claim 6, characterized in that: An annular protrusion (316) is formed on one of the mounting seat body (311) and the heat dissipation cover (32), and an annular groove (321) is formed on the other of the mounting seat body (311) and the heat dissipation cover (32). The cross-sections of the annular groove (321) and the heat insulating sealing ring (62) are both U-shaped, and the heat insulating sealing ring (62) is clamped between the annular protrusion (316) and the annular groove (321).

8. A drone, characterized in that: Comprising the motor assembly according to any one of claims 1-7.

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