Drive device, aircraft and vehicle

Abstract

The application discloses a driving device, an aircraft and a vehicle, and relates to the technical field of transportation, wherein the driving device comprises a stator structure, a rotor structure and at least two pump body structures; the stator structure is provided with a first shell, and the first shell is provided with a mounting cavity; the rotor structure is provided with a second shell and an annular gear, the second shell is provided with an accommodating cavity, the first shell is at least partially located in the accommodating cavity, and the first shell and the second shell can rotate relative to each other; the annular gear is connected to the outside of the second shell; the at least two pump body structures are all located in the mounting cavity; the pump body structure is provided with a driving shaft, and the driving shaft is provided with a first gear; and the first gears of the pump body structures are respectively in transmission cooperation with the inner ring of the annular gear. The mounting cavity provided on the first shell of the stator structure provides an accommodating space for the pump body structure, at least two pump body structures are integrated in the mounting cavity, and the space utilization rate of the driving device is improved.

Description

Technical Field

[0001] This application relates to the field of transportation technology, and in particular to a drive device, aircraft, and vehicle. Background Technology

[0002] A drive unit typically includes a motor (including a stator and rotor). The stator generates a rotating magnetic field, and the rotor begins to rotate under the influence of this magnetic field. During operation, the drive unit generally generates a significant amount of heat, and its internal components require lubrication to reduce wear. Therefore, a pump is usually included in the drive unit to deliver lubricating oil and / or coolant for lubrication and / or cooling of the drive unit's internal components. The rotor transmits rotational motion to the pump body via gears meshing with gears on the pump's input shaft. Consequently, the drive unit requires sufficient internal space to accommodate the thickness and width of the two gears, resulting in relatively low space utilization within the drive unit. Summary of the Invention

[0003] The main objective of this application is to provide a drive unit, aircraft, and transportation vehicle that aims to improve the space utilization rate inside the drive unit.

[0004] To achieve the above objectives, the drive device proposed in this application includes a stator structure, a rotor structure, and at least two pump body structures. The stator structure has a first housing with a mounting cavity. The rotor structure has a second housing and a ring gear. The second housing has a receiving cavity, and the first housing is at least partially located within the receiving cavity. The first housing and the second housing are rotatable relative to each other. The ring gear is externally connected to the second housing. At least two pump body structures are located within the mounting cavity. Each pump body structure has a drive shaft with a first gear. The first gear of each pump body structure is respectively engaged with the inner ring of the ring gear.

[0005] In one embodiment, at least two of the pump body structures are spaced apart; and / or, the first housing has a support protrusion on the side facing the rotor structure, the support protrusion being at least partially located within the receiving cavity, and the support protrusion being rotatably connected to the sidewall of the receiving cavity.

[0006] In one embodiment, the mounting cavity extends to the support protrusion, the mounting cavity has a mounting opening facing the side of the rotor structure where the annular gear is located; and / or,

[0007] The sidewall of the mounting cavity is provided with at least two protrusions, which extend along the protruding direction of the supporting protrusion; the at least two protrusions are spaced apart.

[0008] In one embodiment, the pump body structure further includes a pump housing, and the drive shaft is housed within the pump housing; the pump housing is connected to the bottom wall of the mounting cavity, and one end of the drive shaft passes through the pump housing and is connected to the first gear.

[0009] In one embodiment, the pump housing includes an upper cover and a lower cover, which are detachably connected. The lower cover is detachably or non-detachably connected to the bottom wall of the mounting cavity.

[0010] In one embodiment, the lower cover and the bottom wall of the mounting cavity are an integral structure, and the stator structure is provided with a first liquid inlet channel and a first liquid outlet channel inside; one end of the first liquid inlet channel and one end of the first liquid outlet channel respectively penetrate the lower cover.

[0011] In one embodiment, the drive device further includes a second gear, the bottom wall of the mounting cavity has a connecting shaft, and the second gear is rotatably connected to one end of the connecting shaft; the second gear meshes with the ring gear and the first gear respectively; and / or, the ring gear is detachably connected to the side of the rotor structure opposite to the stator structure.

[0012] In one embodiment, the rotor structure has a second mounting portion on the side opposite to the stator structure, and the second mounting portion has at least two first mounting holes. The outer periphery of the ring gear has a third mounting portion, and the third mounting portion has at least two second mounting holes. The drive device further includes at least two fasteners, which are used to pass through the second mounting holes and connect with the first mounting holes.

[0013] In one embodiment, the second mounting portion includes a limiting groove, and the ring gear is at least partially located within the limiting groove.

[0014] In one embodiment, the driving device includes two pump body structures, wherein the two ends of the widest part of the cross-sectional width of one pump body structure form a first connecting line, and the two ends of the widest part of the cross-sectional width of the other pump body structure form a second connecting line, and an angle is formed between the first connecting line and the second connecting line.

[0015] In one embodiment, the drive device further includes a wire passage, with the opening of the included angle facing the wire passage.

[0016] This application also proposes an aircraft that includes the drive mechanism as described above.

[0017] This application also proposes a means of transportation comprising a land vehicle and an aircraft as described above, the land vehicle being used to carry the aircraft.

[0018] In the technical solution of this application, the stator structure has a first housing, and an installation cavity is provided on the first housing to provide a space for the pump body, thereby integrating the pump body structure into the installation cavity; at the same time, by providing a receiving cavity on the second housing of the rotor structure, the first housing is at least partially located in the receiving cavity, and the first housing and the second housing can rotate relative to each other. The ring gear is externally connected to the second housing, and the power transmission is achieved by the meshing of the ring gear on the rotor structure and the first gear connected to the drive shaft on the pump body structure. This enables the stator structure, rotor structure, and pump body structure to transmit power within a limited space, making the component layout of the stator structure, rotor structure, and pump body structure more compact and improving the space utilization rate inside the drive device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram illustrating the use of an embodiment of the vehicle provided in this application;

[0021] Figure 2 A schematic diagram of the structure of an embodiment of the aircraft provided in this application;

[0022] Figure 3 An exploded structural diagram of an embodiment of the driving device provided in this application;

[0023] Figure 4 A schematic diagram of the structure of an embodiment of the driving device provided in this application;

[0024] Figure 5 A partial structural diagram of the mounting cavity of an embodiment of the driving device provided in this application.

[0025] Explanation of icon numbers:

[0026] 100. Aircraft; 101. Aircraft body; 102. Aircraft rotor; 103. Aircraft rotor; 104. Frame; 1041. Forearm; 1042. Rear arm; 1043. Middle arm;

[0027] 200. Land vehicles;

[0028] 300. Drive unit;

[0029] 1. Stator structure; 11. First housing; 111. Mounting cavity; 112. Support protrusion; 113. Protrusion; 12. First liquid inlet channel; 13. First liquid outlet channel;

[0030] 2. Rotor structure; 21. Second housing; 211. Receiving cavity; 22. Ring gear; 221. Ring body; 222. Gear structure; 223. Third mounting part; 2231. Second mounting hole; 23. Second mounting part; 231. Limiting groove; 232. First mounting hole;

[0031] 3. Pump body structure; 31. Drive shaft; 32. First gear; 33. Pump casing; 331. Upper cover; 332. Lower cover;

[0032] 4. Second gear; 41. Connecting shaft;

[0033] 5. Cable crossing;

[0034] 6. Protective cover;

[0035] 7. First connecting line;

[0036] 8. Second connecting line.

[0037] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0041] A drive unit typically includes a motor (including a stator and rotor). The stator generates a rotating magnetic field, and the rotor begins to rotate under the influence of this magnetic field. During operation, the drive unit generally generates a significant amount of heat, and its internal components require lubrication to reduce wear. Therefore, a pump is usually included in the drive unit to deliver lubricating oil and / or coolant for lubrication and / or cooling of the drive unit's internal components. The rotor transmits rotational motion to the pump body via gears meshing with gears on the pump's input shaft. Consequently, the drive unit requires sufficient internal space to accommodate the thickness and width of the two gears, resulting in relatively low space utilization within the drive unit.

[0042] To address the aforementioned issues, this application proposes a drive unit 300, an aircraft 100, and a vehicle to improve the space utilization rate inside the drive unit 300.

[0043] Reference Figure 1 and Figure 2 In one embodiment of this application, the vehicle includes an aircraft 100 and a land vehicle 200, the land vehicle 200 being used to carry the aircraft 100. It can be understood that the aircraft 100 is used for flying in the air, and the land vehicle 200 is used for driving on land environments such as roads. The land vehicle 200 can be configured as a vehicle similar to a pickup truck or van, thereby forming a carrying space to carry the aircraft 100.

[0044] The aircraft 100 may include a flight body 101 and a foldable structure. The foldable structure may include an arm 102, one end of which is movable relative to the flight body 101, for example, by a rotatable connection or a telescopic connection. The other end of the arm 102 is connected to a flight rotor 103 and can move closer to the flight body 101. This means that the end of the arm 102 connected to the flight rotor 103 can move closer to the flight body 101 as the arm rotates or extends. Of course, the foldable mechanism can also be a foldable wing of a fixed-wing aircraft; this embodiment does not limit this. Therefore, it can be understood that one end of the foldable structure is movable relative to the flight body 101, and the other end of the foldable structure can move closer to the flight body 101.

[0045] Furthermore, the flight body 101 can be configured as a carrying bay, which can be used to carry passengers or cargo. Additionally, multiple flight rotors 103 can be spaced apart on the top of the flight body 101; for example, in... Figure 2 In this embodiment, the top of the flight body 11 is provided with six arms 102, and the ends of the six arms 102 are respectively provided with six flight rotors 103; the top of the flight body 101 may be provided with a frame 104, and the aforementioned arms 12 are connected to the frame 104; along the travel direction of the flight body 11, the rear end of the frame 104 extends out of the flight body 101, which can be understood as the rear end of the frame 104 being suspended relative to the flight body 11; along the travel direction of the flight body 101, the front end of the frame 104 or the flight body 101 is provided with a forearm 1041, and the rear end of the frame 104 is provided with a rear arm 1042, the forearm 1041 and the rear arm 1042 are respectively configured as the aforementioned arms 102, and the forearm 1041 and the rear arm 1042 are respectively rotatably connected to the frame 104, for example, through a pivot. Furthermore, the frame 104 or the flight body 11 may also be provided with a middle arm 1043, which is configured as the aforementioned arm 102. Along the travel direction of the flight body 11, the unfolded forearm 1041, the unfolded middle arm 1043, and the unfolded rear arm 1042 are sequentially arranged, and the middle arm 1043 is rotatably connected to the flight body 11, for example, through a pivot. It is understood that the unfolded forearm 1041, the unfolded middle arm 1043, and the unfolded rear arm 1042 can be fixed in the unfolded state and rotated to a retracted or folded storage state by means of detachable fasteners such as fixing pins and fixing bolts.

[0046] Of course, four arms 102 can also be provided on the top of the flight body 101, for example, only two of the above-mentioned forearms 1041 and two of the above-mentioned rear arms 1042 are provided, and four flight rotors 103 are respectively provided at the ends of the four arms 102. This embodiment does not limit this.

[0047] In addition, refer to Figure 2 or Figure 3 and Figure 4 The aircraft 100 may also include four or more drive units 300, the number of drive units 300 corresponding to the number of arms 102. For example, the aircraft 100 may include four drive units 300 or six drive units 300. Each drive unit 300 includes a stator structure 1, a rotor structure 2, and at least two pump body structures 3. The stator structure 1 has a first housing 11, on which a mounting cavity 111 is provided. The rotor structure 2 has a second housing 21 and a ring gear 22, on which a receiving cavity 211 is provided. The first housing 11 is at least partially located within the receiving cavity 211, and the first housing 11 and the second housing 21 are rotatable relative to each other. The ring gear 22 is externally connected to the second housing 21. At least two pump body structures 3 are located within the mounting cavity 111. Each pump body structure 3 has a drive shaft 31, on which a first gear 32 is provided. The first gear 32 of each pump body structure 3 is respectively engaged with the inner ring of the ring gear 22.

[0048] The stator structure 1 generates a magnetic field to provide driving force for the rotation of the rotor structure 2. The stator structure 1 typically includes a stator core and stator windings, which are housed within the first housing 11. The stator core is generally made of stacked silicon steel sheets, and the stator windings are generally made of copper or aluminum wire. When the windings are energized, the stator structure 1 generates a magnetic field. The rotor structure 2 typically includes permanent magnets. Under the influence of the magnetic field generated by the stator structure 1, the rotor structure 2 experiences electromagnetic force, thereby generating torque and causing the rotor structure 2 to rotate relative to the stator structure 1. The second housing of the stator structure 1 is at least partially located within the receiving cavity of the rotor structure 2, allowing the rotor structure 2 to rotate relative to the stator structure 1. Additionally, the first housing has a mounting cavity 111, providing installation space for the pump body structure 3. The ring gear 22 serves as the transmission component of the rotor structure 2. The rotor structure 2 utilizes the ring gear 22 to mesh with the first gear 32 in the pump body structure 3. The ring gear 22 (also known as the internal gear ring) includes a ring body 221 and multiple tooth structures 222 arranged on the inner ring of the ring body 221. The ring gear 22 can directly mesh with the first gear 32 to achieve transmission, or it can indirectly mesh with the first gear 32 through an intermediate gear (such as the second gear 4 mentioned below) to achieve transmission. When the rotor structure 2 rotates under the magnetic field generated by the stator structure 1, the ring gear 22 transmits the rotational motion to the first gear 32, thereby driving the drive shaft of the pump body structure 3 to rotate, thus enabling the pump body structure 3 to transport liquid. It should be noted that the pump body structure 3 can be a centrifugal pump, where the drive shaft drives the internal impeller to rotate, generating centrifugal force to transport liquid; or it can be a screw pump, where the drive shaft drives the internal screw to rotate, propelling the liquid forward.

[0049] Reference Figure 2 In the drive unit 300, the stator structure 1 can be installed on the arm 102 of the aircraft 100, and the rotor structure 2 can be installed on the flight rotor 103. The rotor structure 2 rotates relative to the stator structure 1 under the magnetic field force of the stator structure 1, so as to drive the flight rotor 103 to rotate relative to the arm 102 of the aircraft 100, providing lift and thrust to the aircraft 100, enabling the aircraft 100 to fly in the air.

[0050] Therefore, refer to Figure 3 and Figure 4 The stator structure 1 of the drive device 300 has a first housing 11, and a mounting cavity 111 is provided on the first housing 11 to provide a space for the pump body, so that the pump body structure 3 can be integrated into the mounting cavity 111. At the same time, by providing a receiving cavity 211 on the second housing 21 of the rotor structure 2, the first housing 11 is at least partially located in the receiving cavity 211, and the first housing 11 and the second housing 21 can rotate relative to each other. The ring gear 22 is externally connected to the second housing 21. Through the meshing transmission between the ring gear 22 on the rotor structure 2 and the first gear 32 connected to the drive shaft 31 on the pump body structure 3, the power transmission of the stator structure 1, rotor structure 2, and pump body structure 3 is realized in a limited space, making the component layout of the stator structure 1, rotor structure 2, and pump body structure 3 more compact and improving the space utilization rate inside the drive device 300. Furthermore, the drive unit 300 incorporates at least two pump structures 3 to create a power redundancy system, ensuring the flight safety of the aircraft 100. If one pump structure fails, the others can continue operating, enhancing the system's reliability and fault tolerance, and ensuring the stable operation of the aircraft 100 and other equipment during critical missions. Integrating multiple pump structures 3 within the mounting cavity 111 fully utilizes the limited space within the drive unit 300, enabling a lightweight overall structure suitable for applications with stringent requirements on size and weight.

[0051] In one embodiment, refer to Figure 4 At least two pump body structures 3 are spaced apart, so that multiple pump body structures 3 are spatially independent of each other, avoiding mutual interference and influence.

[0052] In one embodiment, refer to Figure 3The first housing 11 has a support protrusion 112 on the side facing the rotor structure 2. The support protrusion 112 is at least partially located within the receiving cavity 211, and is rotatably connected to the side wall of the receiving cavity 211. This rotatable connection between the support protrusion 112 and the side wall of the receiving cavity 211 can typically be achieved using components such as bearings to reduce friction and wear. The support protrusion 112 serves as a rotation center, ensuring stable rotation of the rotor structure 2. Specifically, the support protrusion 112 can be located on the side of the stator structure 1 facing the rotor structure 2, with a bearing fitted on its outer surface. The support protrusion 112 is located within the receiving cavity 211 of the rotor structure 2, such that the outer ring of the bearing is interference-fitted with the outer periphery of the support protrusion 112.

[0053] In one embodiment, refer to Figure 3 The mounting cavity 111 extends to the support protrusion 112. The mounting cavity 111 has a mounting opening facing the side of the rotor structure 2 where the ring gear 22 is located. In the drive device 300, by extending the mounting cavity 111 from the first housing 11 of the stator structure 1 to the support protrusion 112, when the support protrusion 112 is located inside the mounting cavity 111, the mounting opening of the mounting cavity 111 is closer to the ring gear 22 on the rotor structure 2, thereby making it easier for the pump body structure 3 installed in the mounting cavity 111 to achieve a transmission connection with the ring gear 22.

[0054] In one embodiment, refer to Figure 3 The mounting cavity 111 has at least two protrusions 113 on its sidewall, which extend along the protruding direction of the supporting protrusion 112; the at least two protrusions 113 are spaced apart. The protrusions 113 can increase the rigidity of the sidewall of the mounting cavity 111, reduce component wear and energy loss caused by sidewall deformation during transmission, and improve the stability and reliability of the entire transmission system.

[0055] In one embodiment, refer to Figure 3 The pump body structure 3 also includes a pump housing 33, and a drive shaft 31 is housed in the pump housing 33. The pump housing 33 is connected to the bottom wall of the mounting cavity 111. For example, the pump housing 33 can be connected to the bottom wall of the mounting cavity 111 by a detachable connection method such as bolt connection or snap-fit. The end of the drive shaft 31 away from the first gear 32 is located in the pump housing 33, and the other end of the drive shaft 31 passes through the pump housing 33 and is connected to the first gear 32. When the first gear 32 rotates under the drive of the ring gear 22, it drives the drive shaft 31 to rotate and realize the function of the pump body structure 3, such as liquid transportation.

[0056] As an external protective component of the pump body structure 3, the pump housing 33 can provide a stable installation environment for the drive shaft 31 and other internal components. The pump housing 33 can be made of alloy material to withstand the pressure and mechanical stress generated during operation and prevent damage to the internal components of the pump body structure 3.

[0057] In one embodiment, refer to Figure 3 The pump casing 33 includes an upper cover 331 and a lower cover 332, which are detachably connected, for example, by bolts. This detachable connection allows for easy inspection and replacement of internal components by simply removing the upper cover 331 when maintenance or repair is needed, eliminating the need for complex disassembly of the entire drive unit 300 and significantly improving maintenance efficiency. During assembly, the lower cover 332 can be accurately connected and fixed to the bottom wall of the mounting cavity 111 using locating pins. Then, the drive shaft 31 and other internal components are installed sequentially from the upper cover 331. This assembly sequence simplifies the assembly process, reduces assembly difficulty, and ensures assembly accuracy. The opening of the upper cover 331 can be equipped with a mounting structure, such as a flange, a flange, or a connecting plate. The mounting structure is provided with a third mounting hole, through which fasteners such as bolts or screws pass to achieve a detachable connection with the first mounting part 113, ensuring a tight connection between the upper cover 331 and the bottom wall of the mounting cavity 111. This not only provides sufficient mechanical strength but also facilitates disassembly and assembly, improving maintenance convenience. Furthermore, sealing materials such as gaskets or sealing strips are typically installed between the mounting structure of the upper cover 331 and the first mounting part 1 to ensure a tight seal at the connection. This allows the upper cover 331 and the lower cover 332 to form a relatively enclosed space after connection, effectively preventing liquid leakage and the intrusion of external impurities, ensuring the cleanliness and normal operation of the pump body structure 3.

[0058] In one embodiment, reference is made to Figure 3 The lower cover 332 can be detachably or non-detachably connected to the bottom wall of the mounting cavity 111. If a detachable connection is used, the lower cover 332 can be positioned by a positioning pin, and then the lower cover 332 and the bottom wall of the mounting cavity 111 can be fixed with bolts. If a non-detachable connection is used, the lower cover 332 and the bottom wall of the mounting cavity 111 can be fixed by welding, or the lower cover 332 and the bottom wall of the mounting cavity 111 can be integrally formed.

[0059] In one embodiment, reference is made to Figure 3 and Figure 5With the lower cover 332 and the bottom wall of the mounting cavity 111 being an integral structure, the stator structure 1 has a first liquid inlet channel 12 and a first liquid outlet channel 13 inside. One end of the first liquid inlet channel 12 and one end of the first liquid outlet channel 13 respectively penetrate the lower cover 332, thereby connecting the first liquid inlet channel 12 and the first liquid outlet channel 13 inside the stator structure 11 with the inside of the pump housing 33, forming a liquid passage. By making the lower cover 332 and the bottom wall of the mounting cavity 111 an integral structure, the components of the pump body structure 3 are simplified, the number of parts is reduced, and the overall structure is more concise. At the same time, while ensuring that the pump housing 33 has sufficient structural strength, the thickness of the lower cover 332 can be reduced, thereby reducing the overall weight of the pump body structure 3. This makes it suitable for weight-sensitive equipment such as aircraft 100, which can improve the load capacity and endurance of aircraft 100 and optimize overall performance.

[0060] With the upper cover 331 and lower cover 332 detachably connected, the stator structure 1 has a second inlet channel and a second outlet channel for liquid flow, enabling liquid delivery connection with the pump body. The lower cover has an inlet hole and an outlet hole. The inlet hole is sealed to one end of the second inlet channel via a sealing gasket (such as a rubber sealing gasket), and the outlet hole is connected to one end of the second outlet channel using the same sealing method to ensure sealed liquid delivery. During system operation, liquid enters through the second inlet channel, is delivered to the pump body structure 3 through the inlet hole, and after pressurization and other treatments by the pump body structure 3, the liquid is then output through the outlet hole and the second outlet channel to components requiring lubrication or cooling. This efficient liquid delivery method improves the overall system operating efficiency. In addition, the sealing connection between the liquid inlet and the second liquid inlet channel, and between the liquid outlet and the second liquid outlet channel, can be made of rubber gaskets or sealing strips, which effectively prevents liquid leakage, reduces energy loss and environmental pollution, and also prevents external impurities from entering the liquid circuit system, ensuring the cleanliness of the liquid and extending the service life of the pump body structure 3 and other related components.

[0061] In one embodiment, refer to Figure 3 and Figure 4 The drive device 300 also includes a second gear 4. The bottom wall of the mounting cavity 111 has a connecting shaft 41, and the second gear 4 is rotatably connected to one end of the connecting shaft 41. The second gear 4 meshes with the ring gear 22 and the first gear 32 respectively. One end of the connecting shaft 41 is detachably or non-detachably connected to the bottom wall of the mounting cavity 111, and the other end of the connecting shaft 41 is rotatably connected to the rotation center of the second gear 4.

[0062] The second gear 4 is rotatably connected to one end of a connecting shaft 41, and the other end of the connecting shaft 41 is connected to the bottom wall of the mounting cavity 111. Specifically, the connection method between the connecting shaft 41 and the bottom wall of the mounting cavity 111 can be selected according to actual needs. For example, the connecting shaft 41 and the bottom wall of the mounting cavity 111 can be integrally formed, which provides high structural strength and stability; alternatively, one end of the connecting shaft 41 can be welded to the bottom wall of the mounting cavity 111 to form a fixed connection structure, providing reliable connection strength; or a press-fit hole can be provided on the bottom wall of the mounting cavity 111, and one end of the connecting shaft 41 can be connected to the press-fit hole through an interference fit. The interference fit connection facilitates installation and disassembly and ensures a certain connection accuracy. It should be noted that a bearing is provided in the middle of the second gear 4, and the other end of the connecting shaft 41 is interference-fitted with the inner ring of the bearing.

[0063] The drive unit 300, by introducing a second gear 4, can adjust the transmission ratio between the internal gear ring, the second gear 4, and the first gear 32, thereby optimizing the power transmission between the rotor structure 2 and the pump body structure 3. This facilitates the design of efficient power output structures according to different working conditions, improving the overall system efficiency. Specifically, by rationally designing the module, number of teeth, and other parameters of the second gear 4, different transmission ratios can be achieved to meet the speed and torque requirements of different application scenarios. Furthermore, adding the second gear 4 can adjust the distance between the pump body structure 3 and the side wall of the mounting cavity 111, avoiding mechanical interference or friction between the pump body structure 3 and the side wall of the mounting cavity 111 due to excessive proximity. This helps reduce vibration and noise during pump body structure 3 operation, improving system stability. Meanwhile, the position of the second gear 4 can be reasonably arranged. For example, the direction of the drive shaft 31 of the pump body structure 3 and the connecting shaft 41 of the second gear 4 can be parallel to the radial direction of the ring gear 22, or the drive shaft of the pump body structure 3 and the connecting shaft 41 of the second gear 4 can form an angle with the radial direction of the ring gear 22. This can ensure more efficient use of space between the pump body structure 3 and other components in the mounting cavity 111, avoid unnecessary space waste, and make the entire drive device 300 more compact.

[0064] In one embodiment, refer to Figure 3The rotor structure 2 has a second mounting portion 23 on the side opposite to the stator structure 1. The second mounting portion 23 has at least two first mounting holes 232. The outer periphery of the ring gear 22 has a third mounting portion 223, which has at least two second mounting holes 2331. The drive device 300 also includes at least two fasteners for passing through the second mounting holes 2331 and connecting with the first mounting holes 232. In addition, the ring gear 22 is detachably connected to the side of the rotor structure 2 opposite to the stator structure 1. For example, the ring gear 22 is connected to the surface of the rotor structure 2 opposite to the stator structure 1 by fasteners such as bolts, screws or pins.

[0065] The ring gear 22 and the rotor structure 2 are detachably connected via fasteners. When maintenance, inspection, or replacement of the ring gear 22 is required, there is no need for complex disassembly of the entire rotor structure 2, improving the convenience and efficiency of maintenance. Secondly, by providing at least two first mounting holes 231 and a second mounting hole 2331 on the second mounting part 23 and the ring gear 22 respectively, and connecting them with fasteners, a multi-point connection structure is formed. This allows for a more even distribution of stress at the connection points, improving the reliability and stability of the connection. Thirdly, during the operation of the drive unit 300, the rotor structure 2 and the ring gear 22 are susceptible to vibration and impact. The multi-point connection effectively reduces the relative displacement at the connection points, enhances the vibration resistance of the entire transmission system, and ensures stable operation even under harsh conditions.

[0066] In one embodiment, refer to Figure 3 The second mounting part 23 includes a limiting groove 231, and the ring gear 22 is at least partially located in the limiting groove 231.

[0067] By utilizing the limiting groove 231, the radial movement of the ring gear 22 can be effectively restricted, ensuring the stability of the ring gear 22 during transmission. When the ring gear 22 is installed onto the rotor structure 2, the ring gear 22 is placed into the limiting groove 231, and then the second mounting hole 2331 on the ring gear 22 is aligned with the first mounting hole 231 on the mounting part. Fasteners pass through the second mounting hole 2331 and connect to the first mounting hole 231. Furthermore, when installing the ring gear 22, the limiting groove 231 can serve a positioning function, allowing the ring gear 22 to be quickly positioned in the correct position, reducing assembly time and workload.

[0068] In one embodiment, refer to Figure 4The drive device 300 includes two pump body structures 3. The two ends of the widest part of the cross-section of one pump body structure 3 form a first connecting line 7, and the two ends of the widest part of the cross-section of the other pump body structure 3 form a second connecting line 8. An angle α is formed between the first connecting line 7 and the second connecting line 8. Specifically, the drive device 300 also includes a cable passage 5, with the opening of the angle facing the cable passage 5. The cable passage 5 is used for routing power lines, drive signal lines, and other cables within the drive device 300. The two pump body structures 3 are arranged such that one end is inclined towards each other to form an angle, and the opening of the angle α faces the cable passage 5, reducing the risk of cables tangling with the pump body structures 3 or other components within the drive device 300 during transmission. Additionally, a protective cover 6 can be provided, with the cable passage 5 formed within the protective cover 6, and the protective cover 6 fixedly connected to the bottom wall of the mounting cavity 111. By adding the protective cover 6, the drive device 300 can effectively prevent cables from tangling, providing protection for the cables. It should be noted that the range of the included angle α is not limited here. For example, the included angle α can be greater than or equal to 60° and less than or equal to 150°.

[0069] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A driving device, characterized in that, include: A stator structure having a first housing having a mounting cavity; A rotor structure having a second housing and a ring gear, the second housing having a receiving cavity, the first housing being at least partially located within the receiving cavity, the first housing and the second housing being rotatable relative to each other; the ring gear being externally connected to the second housing. At least two pump body structures are provided, and both pump body structures are located within the mounting cavity; each pump body structure has a drive shaft, and a first gear is provided on the drive shaft; the first gear of each pump body structure is respectively engaged with the inner ring of the ring gear.

2. The driving device as described in claim 1, characterized in that, At least two of the pump body structures are spaced apart; and / or, The first housing has a support protrusion on the side facing the rotor structure. The support protrusion is at least partially located in the receiving cavity, and the support protrusion is rotatably connected to the side wall of the receiving cavity.

3. The driving device as described in claim 2, characterized in that, The mounting cavity extends to the supporting protrusion, and the mounting cavity is provided with a mounting opening facing the side of the rotor structure where the annular gear is located; and / or, The sidewall of the mounting cavity is provided with at least two protrusions, which extend along the protruding direction of the supporting protrusion; the at least two protrusions are spaced apart.

4. The driving device as described in claim 1, characterized in that, The pump body structure also includes a pump housing, and the drive shaft is housed within the pump housing; the pump housing is connected to the bottom wall of the mounting cavity, and one end of the drive shaft passes through the pump housing and is connected to the first gear.

5. The driving device as described in claim 4, characterized in that, The pump housing includes an upper cover and a lower cover, which are detachably connected. The lower cover is detachably or non-detachably connected to the bottom wall of the mounting cavity.

6. The driving device as described in claim 5, characterized in that, The lower cover and the bottom wall of the mounting cavity are an integral structure. The stator structure is provided with a first liquid inlet channel and a first liquid outlet channel inside. One end of the first liquid inlet channel and one end of the first liquid outlet channel pass through the lower cover respectively.

7. The driving device according to any one of claims 1 to 6, characterized in that, The driving device further includes a second gear, and the bottom wall of the mounting cavity has a connecting shaft. The second gear is rotatably connected to one end of the connecting shaft. The second gear meshes with the ring gear and the first gear respectively. And / or, The ring gear is detachably connected to the side of the rotor structure opposite to the stator structure.

8. The driving device as claimed in claim 7, characterized in that, The rotor structure has a second mounting part on the side opposite to the stator structure, and the second mounting part has at least two first mounting holes. The outer periphery of the ring gear has a third mounting part, and the third mounting part has at least two second mounting holes. The drive device also includes at least two fasteners, which are used to pass through the second mounting holes and connect with the first mounting holes.

9. The driving device as claimed in claim 8, characterized in that, The second mounting part includes a limiting groove, and the ring gear is at least partially located within the limiting groove.

10. The driving device according to any one of claims 2 to 6, characterized in that, The driving device includes two pump body structures. The two ends of the widest part of the cross-sectional width of one pump body structure form a first connecting line, and the two ends of the widest part of the cross-sectional width of the other pump body structure form a second connecting line. An angle is formed between the first connecting line and the second connecting line.

11. The driving device as claimed in claim 10, characterized in that, The drive device also includes a wire passage, and the opening of the included angle faces the wire passage.

12. An aircraft, characterized in that, The aircraft includes a drive unit as described in any one of claims 1 to 11.

13. A means of transportation, characterized in that, The means of transport includes land vehicles and aircraft as described in claim 12, wherein the land vehicles are used to carry the aircraft.

Images