An electric machine and aircraft

Abstract

This utility model relates to the field of motor technology, and in particular discloses a motor and an aircraft, including a stator assembly, a rotor assembly, and a fan. The rotor assembly is sleeved on the stator assembly, and the stator assembly is provided with a plurality of connecting ribs arranged in a circumferential pattern. The fan includes a plurality of fan blades and a plurality of elastic elements. One fan blade is disposed on one of the connecting ribs, and one of the elastic elements abuts against one fan blade and one of the connecting ribs. The fan blades can move along the connecting ribs to expand or contract in the radial direction of the motor. Through this method, when the motor speed increases, the motor's thermal load increases, the motor's centrifugal force increases, and the fan blades overcome the force of the elastic elements, causing the multiple fan blades to expand in the direction of the rotor assembly, thereby increasing the airflow driven by the fan and meeting the motor's heat dissipation requirements.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor and an aircraft. Background Technology

[0002] Electric motors are widely used in aircraft, electric vehicles, industrial equipment, robots, and other fields. They provide driving force through rotation. Electric motors generate heat during rotation, and to dissipate this heat, they are typically equipped with fans. These fans are connected to the motor's rotor assembly, and the rotation of the rotor assembly drives the fan, creating airflow that exchanges heat with the motor, thus cooling it.

[0003] However, in the process of implementing the embodiments of this utility model, the inventors discovered that: currently, the fan includes multiple fan blades, which are fixedly installed on the rotor assembly. The fan blades are not adjustable. When the speed of the motor increases, the thermal load of the motor increases, and the airflow driven by the non-adjustable fan blades cannot meet the heat dissipation requirements of the motor. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a motor and an unmanned aerial vehicle, which aims to solve the technical problem that when the motor speed increases, the motor's thermal load increases, and the airflow driven by the non-adjustable fan blades cannot meet the motor's heat dissipation requirements.

[0005] To solve the above-mentioned technical problems, the present invention provides a motor comprising a stator assembly, a rotor assembly, and a fan. The rotor assembly is sleeved on the stator assembly. The stator assembly is provided with a plurality of connecting ribs arranged in a circumferential manner. The fan comprises a plurality of fan blades and a plurality of elastic elements. One fan blade is disposed on one of the connecting ribs, and one of the elastic elements abuts against one fan blade and one of the connecting ribs. The fan blades can move along the connecting ribs to expand or contract in the radial direction of the motor.

[0006] Optionally, the connecting rib is provided with a guide groove, the fan blade is disposed in the gear position, the elastic member and the gear position are received in the guide groove, the elastic member abuts against the side wall of the gear position and the guide groove, and the gear position can move along the guide groove.

[0007] Optionally, the fan blade is provided with a receiving groove, the receiving groove receiving the connecting rib, and the stop portion is provided at the bottom of the receiving groove.

[0008] Optionally, the connecting rib is provided with a slot, and the fan blade is provided with a buckle part, the buckle part is engaged with the slot, and the buckle part can move along the slot.

[0009] Optionally, the connecting rib is provided with an installation notch, the installation notch communicates with the slot, and the installation notch is used for the buckle part to enter and exit the slot.

[0010] Optionally, a first connecting plate and a second connecting plate are provided on one side of the fan blade, and a third connecting plate and a fourth connecting plate are provided on the other side of the fan blade. Along the rotation direction of the rotor assembly, the first connecting plate of the preceding fan blade is located on one side of the third connecting plate of the next fan blade, and the second connecting plate of the preceding fan blade is located on one side of the fourth connecting plate of the next fan blade.

[0011] Optionally, the motor further includes a cover plate connected to the rotor assembly and covering a portion of the fan blades.

[0012] Optionally, the rotor assembly includes a rotor frame, a rotor housing, and a connecting shaft, wherein the rotor housing is connected to the rotor frame, the rotor frame is provided with the plurality of connecting ribs, and the connecting shaft is connected to the rotor frame.

[0013] Optionally, the rotor assembly includes a plurality of magnetic elements, which are arranged at intervals around the inner wall of the rotor housing.

[0014] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is to provide an aircraft including the aforementioned motor.

[0015] In this embodiment of the invention, the motor includes a stator assembly, a rotor assembly, and a fan. The rotor assembly is sleeved on the stator assembly. The stator assembly is provided with multiple connecting ribs arranged in a circumferential pattern. The fan includes multiple fan blades and multiple elastic elements. One fan blade is disposed on one of the connecting ribs, and one of the elastic elements abuts against one fan blade and one connecting rib. The fan blade can move along the connecting ribs to expand or contract in the radial direction of the motor. When the motor speed increases, the motor's thermal load increases, the motor's centrifugal force increases, and the fan blades overcome the force of the elastic elements, causing the multiple fan blades to expand in the direction of the rotor assembly, thereby increasing the airflow driven by the fan and meeting the motor's heat dissipation requirements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the motor provided in an embodiment of the present utility model;

[0018] Figure 2 This is an exploded view of the structure of the motor provided in this embodiment of the utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the rotor assembly, fan, and cover plate structure of the motor with the fan in a retracted state, provided in an embodiment of this utility model.

[0020] Figure 4 This is a cross-sectional schematic diagram of the rotor assembly, fan, and cover plate structure of the motor with the fan in the unfolded state according to an embodiment of the present utility model.

[0021] Figure 5 This is a schematic diagram of the rotor frame of the motor rotor assembly provided in this embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram of the fan blades of the motor provided in this embodiment of the utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Electric motor;

[0025] 1. Stator assembly; 11. Stator frame; 12. Stator core; 13. Windings;

[0026] 2. Rotor assembly; 21. Rotor frame; 211. Connecting rib; 2111. Guide groove; 2112. Slot; 2113. Mounting notch; 212. Groove; 213. Mounting slot; 214. First through hole; 22. Rotor housing; 23. Connecting shaft; 231. Connecting part; 24. Magnetic component;

[0027] 3. Fan; 31. Fan blade; 311. Gear setting; 312. Receiving slot; 313. Buckle; 314. First connecting plate; 315. Second connecting plate; 316. Third connecting plate; 317. Fourth connecting plate; 32. Elastic element;

[0028] 4. Cover plate; 41. Second through hole. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "locked" to another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figure 1 and Figure 2 This application provides an electric motor 100, which includes a stator assembly 1, a rotor assembly 2, a fan 3, and a cover plate 4. The rotor assembly 2 is sleeved on the stator assembly 1, with a portion of the rotor assembly 2 passing through the stator assembly 1 and the cover plate 4. The rotor assembly 2 is rotatable relative to the stator assembly 1, meaning the electric motor 100 is an external rotor motor. The fan 3 is connected to the rotor assembly 2 and is movable relative to the rotor assembly 2, allowing the fan 3 to expand or contract in the radial direction of the electric motor 100. The fan 3 drives the rotor assembly 2 to rotate, thereby driving airflow to exchange heat with the electric motor 100 and dissipating heat from the motor 100. The cover plate 4 is connected to the rotor assembly 2 and covers a portion of the fan 3, restricting the movement of the fan 3 in the axial direction of the electric motor 100.

[0032] For the stator assembly 1 mentioned above, please refer to Figure 2 The stator assembly 1 includes a stator frame 11, a stator core 12, and a winding 13. The stator core 12 is sleeved on the stator frame 11. The winding 13 is disposed on the stator core 12 and is used to generate a magnetic field when energized.

[0033] For rotor assembly 2 mentioned above, please refer to Figures 2-5 The rotor assembly 2 includes a rotor frame 21, a rotor housing 22, a connecting shaft 23, and multiple magnetic components 24. The rotor housing 22 is connected to the rotor frame 21 and is fitted onto the stator assembly 1. The connecting shaft 23 is connected to the rotor frame 21 and passes through the rotor frame 21 and the stator frame 11. The magnetic components 24 are generally sheet-like in shape, and multiple magnetic components 24 are arranged at intervals around the inner wall of the rotor housing 22 and around the stator core 12. Under the combined action of the magnetic components 24 and the windings 13, the rotor assembly 2 can rotate relative to the stator assembly 1.

[0034] The rotor frame 21 is provided with multiple connecting ribs 211, multiple grooves 212, mounting grooves 213, and a first through hole 214. The multiple connecting ribs 211 are arranged in a circular, spaced-apart configuration. Each connecting rib 211 is provided with a guide groove 2111, a retaining groove 2112, and a mounting notch 2113. The guide groove 2111 is located on one side of the connecting rib 211. The retaining groove 2112 is located on the other side of the connecting rib 211. The grooves 212 are located inside the rotor housing 22, and multiple grooves 212 are arranged at intervals, with each groove 212 accommodating a portion of a magnetic component 24. The mounting notch 2113 is located on the side wall of the connecting rib 211 and connects to the retaining groove 2112. The first through hole 214 is located at the bottom of the mounting groove 213 and connects to the mounting groove 213.

[0035] The connecting shaft 23 passes through the mounting groove 213 and the first through hole 214, and the connecting shaft 23 is provided with a connecting part 231. The connecting part 231 is received in the mounting groove 213 and is connected to the rotor frame 21.

[0036] For fan 3 mentioned above, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 6 The fan 3 includes multiple fan blades 31 and multiple elastic members 32. A fan blade 31 is disposed on a connecting rib 211 so that the multiple fan blades 31 are arranged around each other. A portion of a fan blade 31 is received in a guide groove 2111, and the fan blade 31 can move radially relative to the connecting rib 211 to expand or retract. An elastic member 32 is received in the guide groove 2111, one end of the elastic member 32 abuts against the side wall of the guide groove 2111, and the other end of the elastic member 32 abuts against a portion of the fan blade 31 received in the guide groove 2111.

[0037] The fan blade 31 is provided with a stop portion 311, a receiving groove 312, a latching portion 313, a first connecting plate 314, a second connecting plate 315, a third connecting plate 316, and a fourth connecting plate 317. The stop portion 311 is disposed at the bottom of the receiving groove 312 and is received in the guide groove 2111. The stop portion 311 can move along the guide groove 2111 and abuts against the other end of the elastic member 32. The receiving groove 312 receives the connecting rib 211, so that the fan blade 31 covers the guide groove 2111 and prevents the elastic member 32 from detaching from the guide groove 2111. The latching portion 313 is disposed on the side wall of the receiving groove 312 and is engaged with the latching groove 2112 to prevent the fan blade 31 from separating from the connecting rib 211. The latching portion 313 can move along the latching groove 2112. When assembling or disassembling the fan blade 31, the latching part 313 moves in and out of the slot 2112 along the mounting notch 2113, thus facilitating the assembly and disassembly of the fan blade 31. The first connecting plate 314 and the second connecting plate 315 are spaced apart on one side of the fan blade 31. The third connecting plate 316 and the fourth connecting plate 317 are spaced apart on the other side of the fan blade 31. Along the rotation direction of the rotor assembly 2, the first connecting plate 314 of the preceding fan blade 31 is disposed on one side of the third connecting plate 316 of the following fan blade 31, and the second connecting plate 315 of the preceding fan blade 31 is disposed on one side of the fourth connecting plate 317 of the following fan blade 31. In other words, along the rotation direction of the rotor assembly 2, the second connecting plate 315 of the preceding fan blade 31 is located between the third connecting plate 316 and the fourth connecting plate 317 of the following fan blade 31, and the third connecting plate 316 of the following fan blade 31 is located between the first connecting plate 314 and the second connecting plate 315 of the preceding fan blade 31, so that adjacent fan blades 31 are used to abut against each other, thereby restricting multiple fan blades 31 to prevent the fan blades 31 from moving along the axial direction of the motor 100.

[0038] When the motor 100 is not running (i.e., the rotor assembly 2 is not rotating), and when the motor 100's speed is low (i.e., the rotor assembly 2 is rotating at a low speed), the fan blades 32 do not overcome the force of the elastic element 32, and the fan blades 31 are in a contracted state, resulting in a compact appearance for the motor 100. When the speed of the motor 100 increases (i.e., the speed of the rotor assembly 2 increases), the centrifugal force on the fan blades 31 increases. The fan blades 31 overcome the force of the elastic element 32, and multiple fan blades 31 expand outward in the radial direction to increase their diameter, thereby increasing the airflow driven by the fan 3 and meeting the heat dissipation requirements of the motor 100. When the speed of the motor 100 decreases (i.e., the speed of the rotor assembly 2 decreases), the force of the elastic element 32 is greater than the centrifugal force on the fan blades 31, pushing multiple fan blades 31 to contract inward in the radial direction.

[0039] For cover plate 4 mentioned above, please refer to Figure 2The cover plate 4 is connected to the connecting part 231 and covers the portion of the multiple fan blades 31 to restrict the movement of the fan blades 31 along the axial direction of the motor 100. The cover plate 4 is provided with a second through hole 41 for the connecting shaft 23 to pass through.

[0040] In this embodiment of the invention, the motor 100 includes a stator assembly 1, a rotor assembly 2, and a fan 3. The rotor assembly 2 is sleeved on the stator assembly 1. The stator assembly 1 is provided with a plurality of connecting ribs 211 arranged in a circumferential pattern. The fan 3 includes a plurality of fan blades 31 and a plurality of elastic elements 32. One fan blade 31 is disposed on a connecting rib 211, and one elastic element 32 abuts against one fan blade 31 and one connecting rib 211. The fan blades 31 can move along the connecting ribs 211, so that the fan blades 31 expand or contract in the radial direction of the motor 100. When the speed of the motor 100 increases, the thermal load of the motor 100 increases, the centrifugal force of the motor 100 increases, and the fan blades 31 overcome the force of the elastic elements 32. The plurality of fan blades 31 expand in the direction of the rotor assembly 2, thereby increasing the airflow driven by the fan 3 and meeting the heat dissipation requirements of the motor 100.

[0041] This utility model also provides an embodiment of an aircraft, which includes the motor 100 described above. The structure and function of the motor 100 can be found in the above embodiment, and will not be repeated here.

[0042] It should be noted that while the preferred embodiments of this utility model are provided in the specification and accompanying drawings, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An electric motor, characterized in that, include: Stator assembly; A rotor assembly is sleeved on the stator assembly, and the stator assembly is provided with a plurality of connecting ribs arranged at intervals around the rotor. A fan includes multiple fan blades and multiple elastic elements. One fan blade is disposed on a connecting rib, and one elastic element abuts against the fan blade and the connecting rib. The fan blade can move along the connecting rib to expand or contract the fan blade in the radial direction of the motor.

2. The motor according to claim 1, characterized in that, The connecting rib is provided with a guide groove, the fan blade is provided at the gear position, the elastic member and the gear position are received in the guide groove, the elastic member abuts against the side wall of the gear position and the guide groove, and the gear position can move along the guide groove.

3. The motor according to claim 2, characterized in that, The fan blade is provided with a receiving groove, the receiving groove is used to receive the connecting rib, and the stop part is located at the bottom of the receiving groove.

4. The motor according to claim 1, characterized in that, The connecting rib is provided with a slot, and the fan blade is provided with a buckle part. The buckle part is engaged with the slot and can move along the slot.

5. The motor according to claim 4, characterized in that, The connecting rib is provided with an installation notch, which communicates with the slot and is used for the buckle part to enter and exit the slot.

6. The motor according to claim 1, characterized in that, A first connecting plate and a second connecting plate are provided on one side of the fan blade, and a third connecting plate and a fourth connecting plate are provided on the other side of the fan blade. Along the rotation direction of the rotor assembly, the first connecting plate of the previous fan blade is located on one side of the third connecting plate of the next fan blade, and the second connecting plate of the previous fan blade is located on one side of the fourth connecting plate of the next fan blade.

7. The motor according to claim 1, characterized in that, The motor also includes a cover plate connected to the rotor assembly and covering a portion of the fan blades.

8. The motor according to any one of claims 1-7, characterized in that, The rotor assembly includes a rotor frame, a rotor housing, and a connecting shaft. The rotor housing is connected to the rotor frame, the rotor frame is provided with the plurality of connecting ribs, and the connecting shaft is connected to the rotor frame.

9. The motor according to claim 8, characterized in that, The rotor assembly includes a plurality of magnetic elements, which are arranged at intervals around the inner wall of the rotor housing.

10. An aircraft, characterized in that, Including the motor as described in any one of claims 1-9.

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