Drive device and aircraft

Abstract

The invention relates to a driving device and an aircraft. The driving device comprises a mounting frame assembly, a stator fixed to the mounting frame assembly, a rotor coaxially and rotatably arranged in the circumferential direction of the stator and a rolling connecting assembly. The rotor comprises a first wall and a second wall which are arranged in parallel at an interval along the radial direction; the second wall is positioned on the periphery of the first wall; the rotor and the stator are arranged in a relative rotation mode through the rolling connection assembly. The rolling connecting assembly comprises an inner connecting set and an outer connecting set which are arranged on the mounting frame assembly. The inner connecting group comprises a plurality of rolling connecting structures which are in rolling contact with the first wall at uniform intervals in the circumferential direction; the outer connecting set comprises a plurality of rolling connecting structures which are in rolling contact with the second wall at equal intervals in the circumferential direction. According to the invention, the potential problems of manufacturing difficulty, cost, assembly and maintenance and the like in the construction of a large-diameter bearing can be avoided.

Description

Technical Field

[0001] The present application relates to the technical field of aircraft, and more particularly, to a driving device and an aircraft. Background Art

[0002] The rotor of a drive unit is typically rotatably connected to the stator via bearings. For larger-diameter drives, using corresponding bearings with larger diameters presents limitations in terms of manufacturing difficulty, cost, assembly, and maintenance. Furthermore, it is difficult to ensure mechanical properties such as dimensional accuracy and structural strength, impacting the drive unit's operating efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present application is to provide a driving device and an aircraft in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the present application to solve the technical problem is to construct a driving device, including: Mounting frame assembly; a stator fixed to the mounting frame assembly; The rotor is coaxially and rotatably disposed in the circumferential direction of the stator, and includes a first wall and a second wall that are radially parallel and spaced apart; the second wall is located on the outer periphery of the first wall; A rolling connection assembly, wherein the rotor and the stator are arranged to rotate relative to each other through the rolling connection assembly; the rolling connection assembly includes an inner connection group and an outer connection group arranged on the mounting frame assembly; the inner connection group includes a plurality of rolling connection structures that are in rolling contact with the first wall at uniform intervals along the circumference; the outer connection group includes a plurality of rolling connection structures that are in rolling contact with the second wall at uniform intervals along the circumference.

[0005] In some embodiments, the number of the rolling connection structures in the inner connection group is the same as the number of the rolling connection structures in the outer connection group.

[0006] In some embodiments, the rolling connection structures of the inner connection group and the rolling connection structures of the outer connection group are arranged correspondingly or staggered.

[0007] In some embodiments, the rolling connection structure includes a connecting shaft, an assembly part and at least one bearing; the at least one bearing is sleeved outside the connecting shaft, and its outer ring is in rolling contact with the first wall or the second wall; the assembly part is axially inserted into the mounting frame assembly and the connecting shaft respectively.

[0008] In some embodiments, the connecting shaft defines a connecting groove along the axial direction, and one end of the assembly part is accommodated in the connecting groove; the length of the assembly part exposed on the side of the mounting frame assembly facing the connecting shaft is greater than the depth of the connecting groove.

[0009] In some embodiments, the rolling connection structure further includes a retaining spring for limiting the axial position of the bearing and the connecting shaft; a positioning groove is formed on the shaft wall of the connecting shaft, and the retaining spring is partially disposed in the positioning groove.

[0010] In some embodiments, the bearing diameter of the inner link set is 10% to 50% smaller than the bearing diameter of the outer link set.

[0011] In some embodiments, a protective sleeve is provided outside the outer ring of the bearing.

[0012] In some embodiments, the first wall and the second wall are radially opposite inner and outer walls of the rotor, respectively; Alternatively, one of the axial end surfaces of the rotor is axially recessed to form an annular assembly groove, and the first wall and the second wall are two radially opposite side walls of the assembly groove.

[0013] In some embodiments, the rotor includes a magnetic steel carrier and at least one magnetic steel disposed on the magnetic steel carrier; the magnetic steel adopts a Halbach array structure, and the magnetic steel carrier is made of a polyimide and carbon fiber composite material.

[0014] In some embodiments, the ratio of the outer diameter of the driving device to its axial length is greater than or equal to 10 and less than or equal to 300.

[0015] In some embodiments, the outer diameter of the driving device is greater than or equal to 2500 mm.

[0016] An aircraft is constructed, comprising two drive devices according to any one of the aforementioned embodiments; the two drive devices are coaxially arranged.

[0017] The implementation of the technical solution constructed in this application has at least the following beneficial effects: By configuring the rolling connection assembly to include multiple rolling connection structures, the present application eliminates the need to configure a larger diameter bearing structure for a larger diameter rotor, thereby avoiding potential problems in manufacturing difficulty, cost, assembly and maintenance required to construct large diameter bearings, and thereby avoiding the impact of mechanical performance issues on the operating efficiency of the drive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1is a schematic structural diagram of an aircraft in the first embodiment of the present application; Figure 2 yes Figure 1 Schematic diagram of the positional relationship between the rotor and the rolling connection assembly; Figure 3 yes Figure 1 A schematic diagram of a partial cross-sectional structure of a driving device in FIG. Figure 4 yes Figure 3 A local enlarged view of the P part; Figure 5 yes Figure 1 A simplified structural diagram of the driving device in FIG. Figure 6 is a schematic structural diagram of an aircraft in a second embodiment of the present application; Figure 7 is a schematic structural diagram of an aircraft in a third embodiment of the present application; Figure 8 yes Figure 7 Schematic diagram of the positional relationship between the rotor and the rolling connection assembly; Figure 9 yes Figure 7 Schematic diagram of the partial cross-sectional structure of the drive device. DETAILED DESCRIPTION

[0019] In order to provide a clearer understanding of the technical features, objectives, and effects of the present application, the specific embodiments of the present application are now described in detail with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art may make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0020] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings or the orientation or position relationship in which the product of this application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0022] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0023] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0024] Figures 1 to 5 As shown, the present application constructs a drive device 10 that can be used in an aircraft 1. The drive device 10 may include a rotor 11, a stator 12, a mounting frame assembly 13, and a rolling connection assembly 14. The rotor 11 and the stator 12 are coaxially arranged and rotatable relative to the stator 12. The stator 12 is fixed to the mounting frame assembly 13, and the rotor 11 is rotatably mounted on the mounting frame assembly 13 via the rolling connection assembly 14. This allows the rotor 11 and the stator 12 to rotate relative to each other while ensuring a uniform air gap between them.

[0025] like Figure 5As shown, in some embodiments, the ratio of the outer diameter D of the driving device 10 to its axial length L is greater than or equal to 10 and less than or equal to 300. Specifically, the ratio of the outer diameter D to the axial length L can be 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, 210, 215, 220, 225, 230, 235, 240, 245, 250, 255, 260, 265, 270, 275, 280, 285, 290, 295, 300, or any other value within this range.

[0026] In some embodiments, the outer diameter D of the driving device 10 is greater than or equal to 2500mm. Specifically, the length of the outer diameter D can be 2600mm, 2800mm, 3000mm, 3200mm, 3400mm, 3600mm, 3800mm, 4000mm, 4200mm, 4400mm, 4600mm, 4800mm, 5000mm, 5200mm, 5400mm, 5600mm, 5800mm, 6000mm, 6200mm, 6400mm, 6600mm, 6800mm, 7000mm, 7200mm, 7400mm, 7600mm, 7800mm, 8000mm, 8100mm, 8200mm, 8400mm, 8600mm, 8800mm, 8900mm, 9000mm, 9100mm, 9200mm, 9400mm, 9600mm, 9800mm, 9900mm, 10000mm, 10100mm, 10200mm, 10300mm, 10400mm 000mm, 8200mm, 8400mm, 8600mm, 8800mm, 9000mm, 9200mm, 9400mm, 9600mm, 9800mm, 10000mm, 11000mm, 12000mm, 13000mm, 14000mm, 15000mm, 16000mm, 17000mm, 18000mm, 19000mm, 20000mm, 30000mm, 40000mm, 50000mm, etc., or any other value greater than 2500mm.

[0027] It should be understood that the outer diameter D of the driving device 10 can be flexibly defined according to the structure of the driving device 10. Figure 1 In the embodiment shown, the outer diameter D of the driving device 10 is the outer diameter of the rotor 11. In other embodiments, the outer diameter D of the driving device 10 may also be the outer diameter of the stator 12, etc. This is not specifically limited here.

[0028] like Figure 3As shown, in some embodiments, the rotor 11 may include a magnetic steel carrier 111 and two groups of magnetic steels 112. The magnetic steel carrier 111 is annular, with one end surface recessed to form a U-shaped stator slot 1111. The two groups of magnetic steels 112 are arranged in an annular shape and are respectively fixed to two radially opposite slot walls of the stator slot 1111 of the magnetic steel carrier 111, and are radially spaced apart. The stator 12 may extend into the stator slot 1111 and be radially located between the two magnetic steels 112. The stator 12 is radially spaced equidistant from the two magnetic steels 112 to ensure a uniform air gap.

[0029] Specifically, the stator slot 1111 can be formed by recessing one axial end surface of the magnetic steel carrier 111. The stator 12 includes a winding, one axial end of which is fixed to the mounting frame assembly 13 after being cured by a polymer material, and the other end of which extends axially into the stator slot 1111.

[0030] In some other optional embodiments, the stator slot 1111 may also be formed by a depression on one of the radial end surfaces of the magnetic steel carrier 111 .

[0031] In some other embodiments, the stator 12 may further include an iron core and a winding wound around the iron core, which may be combined by curing a polymer material to form an integrated stator 12 , which is then fixed to the mounting frame assembly 13 .

[0032] In some embodiments, each set of magnetic steels 112 may adopt an existing Halbach array structure. The magnetic steel carrier 111 may be made of a composite material of polyimide and carbon fiber.

[0033] It's important to understand that the magnetic circuit must form a closed path. In traditional drive systems, the magnetic circuit typically passes through the stator, air gap, magnet, magnetic circuit on the back of the magnet carrier (yoke), and stator, forming a closed path. This path configuration requires the magnet carrier to be made of a magnetically conductive material such as iron to ensure minimal magnetic resistance in the magnetic field circuit.

[0034] By configuring magnets 112 in a Halbach array, this application leverages the properties of the Halbach array structure and precisely controls the magnetization direction of magnets 112, ensuring that magnetic lines of force are primarily emitted in a single direction (e.g., toward the air gap) and pass through the interior of the magnet. This configuration ensures that the magnetic field strength on the side of magnets 112 facing away from stator 12 is extremely weak, negligible as leakage flux. Therefore, the magnetic circuit can be closed without configuring magnetic carrier 111 with a magnetically conductive material.

[0035] By using a polyimide and carbon fiber composite material for the magnetic carrier 111, this application significantly reduces the weight of the rotor 11 compared to magnetic carriers made of magnetically conductive materials such as iron in related art. Compared to existing technologies, the weight of the rotor 11 can be reduced by approximately 3 to 4 times.

[0036] In some other embodiments, the magnetic steel 112 may also adopt other existing arrangement structures. The magnetic steel carrier 111 may also be made of magnetic conductive materials such as iron, steel, silicon steel sheet, etc.

[0037] like Figure 1 As shown, in some embodiments, the rotor 11 and the stator 12 further have a coaxially arranged cavity 100 for further expanding the outer diameters of the rotor 11 and the stator 12 .

[0038] When the drive device 10 is applied to an aircraft 1, the enlarged outer diameter of the rotor 11 can increase the moment of inertia of the aircraft 1. The increased moment of inertia can increase the restoring torque of the aircraft, and due to the gyroscopic effect, the increased restoring torque can improve the stability of the aircraft 1 during navigation.

[0039] Furthermore, the provision of cavity 100 allows aircraft 1 to generate significant air resistance while maintaining a certain degree of buoyancy during its descent. Compared to other aircraft of similar mass, its acceleration during descent is less than the acceleration due to gravity, resulting in a slower descent. Due to its slow and steady landing, the impact force per unit area of ​​aircraft 1 is significantly reduced, thereby improving safety.

[0040] The cavity 100 can also be used for receiving and storing objects, thereby enriching the functions of the driving device 10 .

[0041] like Figure 1 and Figure 3 As shown, in some embodiments, the mounting frame assembly 13 may include a base plate 131 and a connecting frame. The rolling connection assembly 14 is disposed on the base plate 131, allowing the rotor 11 to be rotatably disposed relative to the base plate 131. The connecting frame, for mounting the stator 12, is hollow and fixed at one end to the base plate 131. The hollow structure of the connecting frame facilitates the construction of the cavity 100 and reduces the weight of the drive device 10.

[0042] Specifically, the connecting frame may include a vertical wall 132 and a horizontal wall 133. The vertical wall 132 is in the shape of a flat cylinder with two through-holes, one end of which is fixed to the base plate 131 and extends perpendicular to the base plate 131. The horizontal wall 133 is in the shape of a circular plate, with its inner circumference connected to the end of the vertical wall 132 away from the base plate 131 and arranged parallel to the base plate 131.

[0043] The diameter of the base plate 131 is larger than the outer diameter of the vertical wall 132. The rotor 11 is coaxially located radially outside the vertical wall 132 and axially between the horizontal wall 133 and the base plate 131. The space inside the vertical wall 132 can be considered as the cavity 100. The stator slots 1111 of the rotor 11 are recessed from the side of the magnetic steel carrier 111 facing the horizontal wall 133. The stator 12 is fixed to the side of the horizontal wall 133 facing the base plate 131 so as to extend into the stator slots 1111.

[0044] It should be understood that the base plate 131 and the walls of the connecting frame can be assembled to each other detachably or non-detachably by various connection methods such as welding, integral molding, bolt connection, threaded connection, etc., which are not specifically limited here.

[0045] In some embodiments, the rolling connection assembly 14 may include a plurality of rolling connection structures 141 . The rolling connection structures 141 are mounted on the base plate 131 of the mounting assembly 13 and are in rolling contact with the rotor 11 to enable the rotor 11 to rotate relative to the base plate 131 and the stator 12 .

[0046] The rotor 11 is now defined as comprising a first wall 1101 and a second wall 1102 arranged in parallel and spaced apart in the radial direction. The second wall 1102 is radially located on the outer periphery of the first wall 1101. Figure 2 In the illustrated embodiment, the first wall 1101 and the second wall 1102 are radially opposite inner and outer walls of the rotor 11. That is, the first wall 1101 is the side wall of the magnetic carrier 111 radially closer to the vertical wall 132, and the second wall 1102 is the side wall of the magnetic carrier 111 radially farther from the vertical wall 132.

[0047] See also Figure 3 The plurality of rolling connection structures 141 can be divided into two groups based on the connection position between their outer rings 1416 and the rotor 11. The two groups of rolling connection structures 141 are defined as an inner connection group and an outer connection group. The rolling connection structures 141 that make up the inner connection group are further defined as inner rolling connection structures 141E, and the rolling connection structures 141 that make up the outer connection group are further defined as outer rolling connection structures 141F.

[0048] The inner rolling connection structures 141E are evenly spaced along the circumferential direction on a side of the rotor 11 close to the vertical wall 132, and are in rolling contact with the first wall 1101. The outer rolling connection structures 141F are evenly spaced along the circumferential direction on a side of the rotor 11 away from the vertical wall 132, and are in rolling contact with the second wall 1102.

[0049] By configuring the rolling connection assembly 14 to include a plurality of rolling connection structures 141, the present application can avoid the need to configure a bearing structure with a larger diameter for a rotor 11 with a larger diameter, thereby avoiding potential problems in manufacturing difficulty, cost, assembly and maintenance required to construct large-diameter bearings, and further avoiding the impact of mechanical performance issues on the operating efficiency of the drive device 10.

[0050] like Figure 4 As shown, in some embodiments, the rolling connection structure 141 may include a connecting shaft 1412, an assembly 1414, and at least one bearing 1411. The at least one bearing 1411 is sleeved around the outer circumference of the connecting shaft 1412. The inner ring 1417 of the bearing 1411 is fixed to the connecting shaft 1412, while the outer ring 1416 is in rolling contact with the first wall 1101 or the second wall 1102. The assembly 1414 is axially inserted into the base plate 131 of the mounting frame assembly 13 and the connecting shaft 1412, respectively, to facilitate assembly of the rolling connection structure 141 with the mounting frame assembly 13.

[0051] The first wall 1101 is correspondingly provided with at least one stepped surface (not shown), against which at least one end of the outer ring 1416 of the bearing 1411 of the inner rolling connection structure 141E abuts. The second wall 1101 is correspondingly provided with at least one stepped surface (not shown), against which at least one end of the outer ring 1416 of the bearing 1411 of the outer rolling connection structure 141F abuts, thereby cooperating with the inner rolling connection structure 141E to bear the axial load of the rotor 11.

[0052] The base plate 131 of the mounting frame assembly 13 defines through-holes (not shown) corresponding to the locations of the rolling connection structures 141. The connecting shaft 1412 is axially recessed to form a connecting slot 1415. The assembly member 1414 is at least partially rod-shaped and removably inserted into the through-holes and connecting slot 1415.

[0053] Such an arrangement facilitates the assembly and replacement of the bearing 1411. Even if the bearing 1411 is damaged during the life cycle of the drive device 10, it can be quickly resolved by replacing it, thereby extending the overall life of the drive device 10 and reducing maintenance and replacement costs.

[0054] By providing multiple rolling connection structures 141, the drive device 10 of the present application can be regarded as a large bearing with driving function. The rotor 11 of the drive device 10 can be regarded as the outer ring of the bearing in the related art, and the mounting frame assembly 13 can be regarded as the inner ring of the bearing in the related art.

[0055] It's important to understand that in related art bearings, a layer of balls is radially arranged between the inner and outer rings. During operation, the balls' motion between the inner and outer rings is not one-dimensional, but three-dimensional. The difference between the curvature radii of the inner and outer ring raceways of the bearing matches the diameter of the balls, forming a conjugate contact surface. The balls consistently roll three-dimensionally along the pre-defined track defined by the inner and outer rings, reducing energy consumption associated with relative rotation between the two rings.

[0056] Due to the structure of bearing 1411, it can only achieve one-dimensional rolling. If this application simply considers bearing 1411 as a ball bearing in the related art, a rolling connection structure 141 is provided radially between rotor 11 and mounting frame assembly 13 (vertical wall 132), with opposite sides of bearing 1411 of rolling connection structure 141 maintaining contact with rotor 11 and mounting frame assembly 13, respectively. Because the linear velocities of bearing 1411 at the contact points between rotor 11, rotor 11, and vertical wall 132 differ during rotation of rotor 11 relative to mounting frame assembly 13, bearing 1411 cannot simultaneously achieve rolling friction with both rotor 11 and vertical wall 132. Instead, bearing 1411 experiences rolling friction with one of the rotor 11 and vertical wall 132, while experiencing sliding friction with the other. This can cause severe noise, heat, and wear during operation of drive device 10.

[0057] The present application utilizes an assembly member 1414 to assemble the rolling connection structure 141 to the base plate 131. By providing a bearing 1411 and fitting its inner ring 1417 onto the outer periphery of the connecting shaft 1412, and allowing the outer ring 1416 to engage in rolling contact with the rotor 11, the relative rotation of the inner rings 1417 and outer rings 1416 of the multiple bearings 1411 can be utilized to increase the mobility of the rotor 11 relative to the mounting frame assembly 13. This arrangement eliminates the need for the outer rings 1416 of the bearings 1411 to simultaneously engage the rotor 11 and the vertical wall 132, thereby avoiding sliding friction and reducing noise, heating, and wear of the bearings 1411 during operation.

[0058] The present application improves the stability of the assembly of the rolling connection assembly 14 and the rotor 11 by dividing the multiple rolling connection structures 141 into an inner connection group and an outer connection group, and arranging the bearings 1411 of the two groups of rolling connection structures 141 to respectively make rolling contact with the two parallel and spaced side walls of the rotor 11 (i.e., the first wall 1101 and the second wall 1102).

[0059] The present application provides a rolling connection assembly 14 having multiple bearings 1411 , and can use multiple bearings 1411 with smaller diameters to achieve the effect of bearings with larger diameters in the related art.

[0060] It should be understood that when the rotor 11 and stator 12 are arranged such that the drive device 10 is a magnetic levitation motor, the axial and radial loads of the drive device 10 are unloaded during operation, thereby reducing the force exerted by the rotor 11 on the rolling connection assembly 14. Therefore, in this embodiment, the rolling connection structure 141 can be further lightweighted, for example by reducing the number of rolling connection structures 141 in the inner connection group and / or the outer connection group, reducing the diameter of the bearings 1411 in at least some of the rolling connection structures 141, etc., thereby further reducing the weight of the drive device 10.

[0061] For example, let's assume the inner diameter of rotor 11 is approximately 6 meters. If a bearing using related art were used to connect rotor 11 to mounting frame assembly 13, a bearing with a diameter of approximately 6 meters would need to be manufactured. A bearing with a diameter of 6 meters would weigh approximately 16 tons. If the rolling connection assembly 14 constructed in this application were used, the combined weight of the bearings 1411 of each rolling connection structure 141 would only be approximately 16 kilograms, a nearly 1,000-fold difference in weight between the two.

[0062] The present application can also fix the relative position between each bearing 1411 and the mounting frame assembly 13 by providing the assembly part 1414 and the connecting shaft 1412. In other words, the arrangement of the assembly part 1414 and the connecting shaft 1412 of the present application can also serve as a structure such as a retainer required for the bearing in the related art.

[0063] It should be noted that the bearing 1411 may specifically be an existing high-speed ball bearing, a high-speed cross-ball bearing, a high-speed double-row ball bearing, a high-speed sliding bearing, a self-lubricating high-speed sliding bearing, etc. No specific limitation is made here.

[0064] In some embodiments, the number of the bearings 1411 can also be two, and the two bearings 1411 are sequentially sleeved on the connecting shaft 1412 along the axial direction to improve the bending moment resistance of the rolling connection structure 141.

[0065] Of course, the number of the bearings 1411 can also be three, etc.

[0066] In some embodiments, the outer ring 1416 of the bearing 1411 is also provided with a protective sleeve (not shown in the figure) to further reduce noise during operation, reduce friction loss between the outer ring 1416 of the bearing 1411 and the rotor 11, reduce frictional heat, and increase the service life of the rolling connection structure 141.

[0067] Specifically, the protective cover can be made of non-metallic reinforced nylon, or a non-metallic or metallic composite wear-resistant material, which is not specifically limited here.

[0068] Of course, protective layers made of composite wear-resistant materials may also be provided at positions corresponding to the first wall 1101 and the second wall 1102 of the rotor 11 to further reduce friction loss, lower noise, and increase service life.

[0069] In some embodiments, one end of the assembly member 1414 is received in the connecting groove 1415. When the assembly member 1414 is assembled in place, the length of the assembly member 1414 exposed on the side of the base plate 131 facing the connecting shaft 1412 is greater than the depth of the connecting groove 1415.

[0070] By controlling the length of assembly member 1414, when assembly member 1414 is in place, the end of assembly member 1414 abuts against the wall of connecting groove 1415, thereby supporting connecting shaft 1412. This arrangement facilitates flexible adjustment of the spacing between bearing 1411 and base plate 131, preventing friction between the inner ring 1417 and outer ring 1416 of bearing 1411 and base plate 131 during relative rotation.

[0071] In some other embodiments, the connecting shaft 1412 may further define a connecting hole with two through ends along the axial direction, and the assembly part 1414 is disposed in the connecting hole.

[0072] In some other embodiments, the connecting shaft 1412 may also be a solid shaft structure, and the assembly part 1414 may also be fixed to the connecting shaft 1412 by welding, gluing, etc.

[0073] Continue reading Figure 4 In some embodiments, the rolling connection structure 141 may further include a retaining spring 1413 (spring clip), and a positioning groove (not shown in the figure) is defined on the shaft wall of the connecting shaft 1412. The retaining spring 1413 is partially arranged in the positioning groove to limit the axial position of the bearing 1411 and the connecting shaft 1412.

[0074] In some embodiments, the assembly member 1414 is a screw, and the wall of the connecting groove 1415 is defined with threads. The assembly member 1414 is threadedly connected to the connecting shaft 1412. By configuring the assembly member 1414 as a screw, the convenience of assembly and disassembly of the rolling connection structure 141 can be further improved.

[0075] In some other embodiments, when the connecting shaft 1412 is defined with connecting holes extending through both ends, the assembly part 1414 may also be a connecting structure such as a bolt.

[0076] In some other embodiments, the assembly part 1414 may also be a rod-shaped structure with a smooth surface. The assembly part 1414 and the connecting shaft 1412 are fixed to each other through interference fit between the assembly part 1414 and the connecting groove 1415 or the connecting hole.

[0077] like Figure 2 As shown, in some embodiments, the number of inner rolling connection structures 141E in the inner connection group is the same as the number of outer rolling connection structures 141F in the outer connection group, and the two are arranged in a corresponding manner along the circumferential direction. That is, each inner rolling connection structure 141E corresponds to an outer rolling connection structure 141F in the radial direction, and each outer rolling connection structure 141F also corresponds to an inner rolling connection structure 141E in the radial direction.

[0078] In some other embodiments, the number of the inner rolling connection structures 141E may be greater or less than the number of the outer rolling connection structures 141F.

[0079] In some other embodiments, the inner rolling connection structures 141E and the outer rolling connection structures 141F may be arranged in a staggered manner along the circumference. That is, the projection of each outer rolling connection structure 141F on the circumference defined by the inner connection group is located at the midpoint between two adjacent inner rolling connection structures 141E. The projection of each inner rolling connection structure 141E on the circumference defined by the outer connection group is located at the midpoint between two adjacent outer rolling connection structures 141F.

[0080] Of course, the layout positions of the multiple inner rolling connection structures 141E of the inner connection group on the first wall 1101 and the layout positions of the multiple outer rolling connection structures 141F of the outer connection group on the second wall 1102 can also be flexibly adjusted.

[0081] In some embodiments, the diameter of the inner rolling connection structure 141E is 10% to 50% smaller than the diameter of the outer rolling connection structure 141F. Specifically, the diameter of the inner rolling connection structure 141E can be 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48% smaller than the diameter of the outer rolling connection structure 141F, or any other value within this range.

[0082] It should be understood that because the first wall 1101 and the second wall 1102 are radially opposite sidewalls of the magnetic carrier 111, the linear velocities of the first wall 1101 and the second wall 1102 differ during the rotation of the rotor 11. If the inner and outer rolling connection structures 141E and 141F have the same diameter, the linear velocity of the inner rolling connection structure 141E will be lower than that of the outer rolling connection structure 141F, while the angular velocity of the outer rolling connection structure 141F will be higher than that of the inner rolling connection structure 141E. Given the same operating time, the outer rolling connection structure 141F is more likely to be damaged first.

[0083] The present application can reduce the difference in angular velocity between the inner rolling connection structure 141E and the outer rolling connection structure 141F during operation by adjusting the diameter difference between the inner rolling connection structure 141E and the outer rolling connection structure 141F.

[0084] In some other embodiments, the driving device 10 can also be applied to other technical fields such as wind power generation.

[0085] like Figure 1 As shown, the present application also constructs an aircraft 1, which may include two driving devices 10 in any of the aforementioned embodiments. The two driving devices 10 are coaxial and mirror-imaged, and cooperate with each other to realize driving of the aircraft 1.

[0086] Furthermore, the aircraft 1 may also include two sets of wind wings and a control device (not shown). Each set of wind wings includes multiple blades, and the blades of the two sets of wind wings are conjugately arranged. The blades of each set of wind wings are evenly spaced along the circumference and arranged on the rotor 11 of the drive device 10. The control device is electrically connected to the two drive devices 10 to control the operation of the two drive devices 10 respectively.

[0087] The two driving devices 10 are now defined as a first driving device 10A and a second driving device 10B, and the two sets of wind blades are defined as a first wind blade 21 and a second wind blade 22 .

[0088] The first drive unit 10A includes a first rotor 11A, a first stator 12A, a first mounting frame assembly 13A, and a first rolling connection assembly 14A. The first mounting frame assembly 13A includes a first base plate 131A and a first connecting frame, and defines a first cavity 100A. The first rotor 11A is disposed on the side of the first base plate 131A facing away from the second drive unit 10B. The blades of the first wind blade 21 are evenly spaced around the circumference of the first rotor 11A. The first stator 12A is mounted on the first connecting frame. The first rolling connection assembly 14A includes a plurality of first rolling connection structures 141A, each of which is disposed on the side of the first base plate 131A facing away from the second drive unit 10B.

[0089] The second drive unit 10B includes a second rotor 11B, a second stator 12B, a second mounting frame assembly 13B, and a second rolling connection assembly 14B. The second mounting frame assembly 13B includes a second base plate 131B and a second connecting frame, and defines a second cavity 100B. The second rotor 11B is disposed on the side of the second base plate 131B facing away from the first drive unit 10A. The blades of the second wind blade 22 are evenly spaced around the circumference of the second rotor 11B. The second stator 12B is disposed on the second connecting frame. The second rolling connection assembly 14B includes a plurality of second rolling connection structures 141B, each of which is disposed on the side of the second base plate 131B facing away from the first drive unit 10A. The first base plate 131A and the second base plate 131B are disposed adjacent to each other.

[0090] During operation, the two drive motors are controlled to rotate at the same speed and in opposite directions, causing the two sets of conjugate airfoils to rotate at the same speed and in opposite directions. This generates a tubular aerodynamic field. This tubular aerodynamic field exerts a vertical downward pressure on the ground and the atmosphere, thereby generating the lift required for takeoff and landing of the aircraft 1. The reaction torques generated by the two drive motors are equal in magnitude and opposite in direction, thus canceling each other out.

[0091] By controlling the two drive motors to rotate in opposite directions at differential speeds, the two sets of conjugate wind blades rotate in opposite directions at differential speeds. The reaction torques generated by the two drive motors are different in magnitude and opposite in direction, so a controllable reaction torque can be generated, thereby achieving agile steering of the aircraft 1.

[0092] In some embodiments, the aircraft 1 may further include a third driving device 30 , which is electrically connected to the control device and is used to drive the aircraft 1 to move horizontally under the control of the control device.

[0093] It should be noted that the two sets of wind blades, the third driving device 30 and the control device can all be implemented using existing structures, which will not be elaborated here.

[0094] Figure 6 A drive device 10C according to a second embodiment of the present application and an aircraft 1C equipped with the drive device 10C are shown. The drive device 10C differs from the drive device 10 according to the first embodiment primarily in that, in this embodiment, the stator slots 1111C of the rotor 11C extend radially, and the stator 12C extends radially and horizontally into the stator slots 1111C.

[0095] Specifically, the rotor 11C is coaxially located on the outer periphery of the vertical wall 132C. One side of the rotor 11C close to the vertical wall 132C is recessed to form a stator slot 1111C. The inner end of the stator is fixed to the vertical wall 132C, and the outer end extends radially to extend into the stator slot 1111C.

[0096] In some other embodiments, the rotor 11C may also be coaxially located on the inner periphery of the vertical wall 132C. In this embodiment, the cavity 100C of the driving device 10C is defined by the rotor 11C and the base plate 131C.

[0097] exist Figure 6 In the embodiment shown, the third driving device 30C of the aircraft 1C adopts an existing fan, which is coaxially arranged on the top of the two driving devices 10C.

[0098] Figures 7 to 9 The third embodiment of the present application shows a drive device 10G and an aircraft 1G equipped with the drive device 10G. This drive device 10G differs primarily from the drive device 10C of the second embodiment in that, in this embodiment, one of the axial end surfaces of the rotor 11G is axially recessed to form an annular mounting groove 110G. A first wall 1101G and a second wall 1102G are radially opposing side walls of the mounting groove 110G. Both an inner rolling connection structure 141EG and an outer rolling connection structure 141FG are located within the mounting groove 110G.

[0099] Specifically, the end surface of the rotor 11G facing the base plate 131G is recessed in the axial direction to form a fitting groove 110G.

[0100] like Figure 8 As shown, in this embodiment, the number of inner rolling connection structures 141EG is equal to the number of outer rolling connection structures 141FG, and the two are staggered along the circumferential direction. The projection of each outer rolling connection structure 141FG on the circumference defined by the inner connection group is located at the midpoint between two adjacent inner rolling connection structures 141EG. The projection of each inner rolling connection structure 141EG on the circumference defined by the outer connection group is located at the midpoint between two adjacent outer rolling connection structures 141FG.

[0101] With this arrangement, the radial dimension of the assembly groove 110G can be set to be smaller than the sum of the radial dimensions of the two rolling connection structures 141G.

[0102] Of course, if Figure 7 As shown, when the size of the rotor 11G allows the radial size of the assembly groove 110G to be larger than the sum of the radial sizes of the two rolling connection structures 141G, the inner rolling connection structure 141EG and the outer rolling connection structure 141FG can also be set accordingly.

[0103] It can be understood that the above technical features can be used in any combination without limitation.

[0104] The above embodiments only express the specific implementation methods of the present application. The descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present application, and several deformations and improvements can be made, which all fall within the scope of protection of the present application. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present application should fall within the scope of coverage of the claims of the present application.

Claims

1. A driving device, characterized in that: include: Mounting frame assembly; a stator fixed to the mounting frame assembly; The rotor is coaxially and rotatably disposed in the circumferential direction of the stator, and includes a first wall and a second wall that are radially parallel and spaced apart; the second wall is located on the outer periphery of the first wall; A rolling connection assembly, wherein the rotor and the stator are arranged to rotate relative to each other through the rolling connection assembly; the rolling connection assembly includes an inner connection group and an outer connection group arranged on the mounting frame assembly; the inner connection group includes a plurality of rolling connection structures that are in rolling contact with the first wall at uniform intervals along the circumference; the outer connection group includes a plurality of rolling connection structures that are in rolling contact with the second wall at uniform intervals along the circumference.

2. The driving device according to claim 1, characterized in that The number of the rolling connection structures in the inner connection group is the same as the number of the rolling connection structures in the outer connection group.

3. The driving device according to claim 2, characterized in that The rolling connection structures of the inner connection group and the rolling connection structures of the outer connection group are arranged correspondingly or staggered.

4. The driving device according to claim 1, characterized in that The rolling connection structure includes a connecting shaft, an assembly part and at least one bearing; the at least one bearing is sleeved outside the connecting shaft, and its outer ring is in rolling contact with the first wall or the second wall; the assembly part is axially inserted into the mounting frame assembly and the connecting shaft respectively.

5. The driving device according to claim 4, characterized in that The connecting shaft defines a connecting groove along the axial direction, and one end of the assembly part is accommodated in the connecting groove; the length of the assembly part exposed on the side of the mounting frame component facing the connecting shaft is greater than the groove depth of the connecting groove.

6. The driving device according to claim 4, characterized in that The rolling connection structure further includes a retaining spring for limiting the axial position of the bearing and the connecting shaft; a positioning groove is formed on the shaft wall of the connecting shaft, and the retaining spring is partially arranged in the positioning groove.

7. The driving device according to claim 4, characterized in that The bearing diameter of the inner connection set is 10% to 50% smaller than the bearing diameter of the outer connection set.

8. The driving device according to claim 4, characterized in that A protective sleeve is arranged outside the outer ring of the bearing.

9. The driving device according to any one of claims 1 to 8, characterized in that: The first wall and the second wall are inner and outer walls of the rotor respectively opposite in the radial direction; Alternatively, one of the axial end surfaces of the rotor is axially recessed to form an annular assembly groove, and the first wall and the second wall are two radially opposite side walls of the assembly groove.

10. The driving device according to any one of claims 1 to 8, characterized in that: The rotor includes a magnetic steel carrier and at least one magnetic steel arranged on the magnetic steel carrier; the magnetic steel adopts a Halbach array structure, and the magnetic steel carrier is made of a polyimide and carbon fiber composite material.

11. The driving device according to any one of claims 1 to 8, characterized in that: The ratio of the outer diameter of the driving device to its axial length is greater than or equal to 10 and less than or equal to 300.

12. The driving device according to any one of claims 1 to 8, characterized in that: The outer diameter of the driving device is greater than or equal to 2500 mm.

13. An aircraft, characterized in that: It comprises two driving devices according to any one of claims 1 to 12; the two driving devices are coaxially arranged.

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