Driving device for generating wing torsion

Abstract

The invention discloses a driving device for generating wing torsion, which belongs to the technical field of morphing aircraft structures, and is characterized in that the parts, except a certain spanwise occupying position, of a front beam and a rear beam of a wing are driven to deflect upwards or downwards, so that the parts of the wing generate active clockwise or anticlockwise torsion deformation. A hinge point is arranged at a certain spanwise occupying position of a driven wing spar, the wing spar is divided into a fixed section and a movable section, webs of the two sections of beams are hinged through a single lug and a double lug, upper edge strips and lower edge strips on the left sides and the right sides of the webs are connected through four driving screws respectively, and the thread direction of the upper edge strip driving screw is opposite to the thread direction of the lower edge strip driving screw. Therefore, when the driving screws of the upper edge strip and the lower edge strip work, axial forces in opposite directions are generated, the axial forces in opposite directions form a couple to drive the movable section of the wing spar to deflect around the hinge point, and the front beam and the rear beam of the wing deflect upwards and downwards around the hinge point to enable the movable section of the wing to twist.

Description

Technical Field

[0001] The invention belongs to the technical field of variant aircraft structures, and in particular relates to a driving device for generating wing torsion. Background Art

[0002] Morphing aircraft can actively change their shape during flight, so that they can achieve optimal aerodynamic performance and flight efficiency in a variety of flight environments. Most studies on morphing aircraft focus on how to increase the lift of the aircraft, reduce drag, or improve the lift-to-drag ratio, such as changing the chord length or span (changing the wing area), changing the sweep angle, changing the curvature of the leading and trailing edges, etc. However, the angle of attack of the wing has a significant effect on the aerodynamic characteristics of the aircraft. Changing the leading edge twist angle distribution of the wing can improve the pressure distribution on the wing, reduce the load at the root of the wing, and thus increase the service life of the structure; by adjusting the twist shape of the wing, the roll control efficiency of the aircraft can be improved, and the static aeroelastic characteristics can also be improved; in addition, the active twisting of the wing combined with the curvature of the leading and trailing edges can make the wing produce more shape changes.

[0003] At present, there are few solutions for changing the torsion shape of the wing. The present invention studies a driving device, which is arranged at a certain position in the span direction of the wing, and drives the front beam and the rear beam of the wing to deflect upward or downward respectively, so that the wing produces active torsion deformation. Summary of the invention

[0004] The present invention provides a simple and reliable driving solution for an active wing torsional deformation solution, which causes the front and rear beams outside a certain spanwise position of the wing to deflect upward or downward, so that this part of the wing produces active clockwise or counterclockwise torsional deformation.

[0005] The present invention is implemented as follows: a hinge point is set at a spanwise position of a driven wing spar, the wing spar is divided into a fixed section and a movable section, the webs of the two sections of the spar are hinged by single and double ears, the upper and lower edge strips on the left and right sides of the web are respectively connected by four driving screws, and the thread direction of the upper edge strip driving screw is opposite to the thread direction of the lower edge strip driving screw. Therefore, when the motor is working, the driving torque of the motor will be transmitted to the driving screw through various levels of driving, and the driving screws of the upper and lower edge strips will work to generate axial forces in opposite directions, and the axial forces in opposite directions will form a couple to drive the movable section of the wing spar to deflect around the hinge point, and the upward and downward deflection of the front and rear beams of the wing around the hinge point will cause the movable section of the wing to twist.

[0006] Specifically, the driving device drives the part of the front and rear beams of the wing outside a certain spanwise position to deflect upward or downward, so that this part of the wing produces active clockwise or counterclockwise torsional deformation; a hinge point is set at a certain spanwise position of the driven wing spar to divide the wing spar into a fixed section and a movable section; the wing torsion driving device includes a threaded transmission part and a transmission driving part; the threaded transmission part includes: a nut, a support block, a driving screw, and a stopper; the transmission driving part includes: a motor, a primary drive, a secondary drive, a tertiary drive, a support plate, and a primary drive, a secondary drive, a tertiary drive The corresponding shaft, input gear, output gear and shaft support, and the corresponding motor support of the motor; the threaded transmission part connects the upper and lower edge strips on the left and right sides of the web of the fixed section and the movable section and transmits the axial force. After being driven, the threaded transmission part will produce a relative displacement to deflect the movable section of the wing beam around the hinge point; the transmission drive part is arranged in the fixed section of the wing beam, and the driving shaft supports and motor supports of various levels are installed on the support plate. The driving torque of the motor is transmitted to the first-level drive, and the first-level drive transmits the driving torque to the second-level drive, the second-level drive transmits the driving torque to the third-level drive, and the third-level drive outputs the driving torque to the threaded transmission part.

[0007] Furthermore, the webs of the front and rear beams of the wing are hinged by single and double ears, and the upper and lower slats on the left and right sides of the webs are connected by four driving screws respectively, and the thread direction of the driving screws of the upper slats is opposite to the thread direction of the driving screws of the lower slats. Therefore, the driving screws of the upper and lower slats will generate axial forces in opposite directions when working, and these axial forces in opposite directions will form a force couple to drive the active section of the wing beam to deflect around the hinge point, and the upward and downward deflection of the front and rear beams of the wing around the hinge point will cause the active section of the wing to twist.

[0008] Furthermore, the driving screw is divided into 6 parts, the first part is the threaded end adapted to the nut, the second part is a circular smooth rod, the third part is a circular boss, the fourth part is a circular smooth rod, the fifth part is a driving gear for receiving driving torque, and the sixth part is a smooth end extending into the circular recess of the block.

[0009] Furthermore, the nut is in the shape of a quadrangular prism, one of whose bottom surfaces are welded to the upper and lower edge strips on the left and right sides of the web of the active section of the wing beam, and one of whose side surfaces is welded to the web, the nut cooperates with the threaded portion of the driving screw, and the thread directions of the nuts of the upper and lower edge strips are opposite, when each driving screw is subjected to the action of the driving torque, axial forces in opposite directions will be generated in the thread pairs of the upper and lower edge strips, and this pair of axial forces in opposite directions will form a force couple to drive the active section of the beam to deflect around the hinge point; the support block is in the shape of a quadrangular prism, one of whose bottom surfaces are welded to the upper and lower edge strips on the left and right sides of the web of the active section of the wing beam, and one of whose side surfaces is welded to the web, with a circular through hole in the middle; the driving screw passes through the circular through hole, and the boss on the driving screw contacts the side of the support block, so that when the driving screw rotates, the driving screw is prevented from axial displacement; The stopper is a quadrangular prism, one bottom surface of which is welded to the upper and lower edge strips on the left and right sides of the web of the active section of the wing beam, and one side surface is welded to the web. A circular depression is opened in the middle, allowing one end of the driving screw to extend into it, thereby preventing the driving screw from axial displacement and radial swinging.

[0010] Furthermore, the shafts, gears and shaft supports corresponding to the primary drive are: a primary transmission shaft, a primary transmission gear, and a primary shaft support; the shafts, gears and shaft supports corresponding to the secondary drive are: a secondary transmission shaft, a secondary input gear, a secondary output gear, and a secondary shaft support; the shafts, gears and shaft supports corresponding to the tertiary drive are: a tertiary transmission shaft, a tertiary input gear, a tertiary output gear, and a tertiary shaft support.

[0011] Furthermore, the primary drive is located on one side of the web of the fixed section beam, the primary transmission shaft is connected to the motor, receives the output torque and rotation speed of the motor, and the primary transmission gear is meshed with the secondary input gear of the secondary drive, so the rotation speed of the primary transmission shaft and the primary transmission gear is the same as the output speed of the motor, and the driving torque of the motor is transmitted to the primary transmission gear through the primary transmission shaft, and the primary transmission gear then transmits the driving torque to the secondary input gear.

[0012] Furthermore, the secondary drive distributes the motor torque to the tertiary drives on both sides of the web and synchronizes them. Therefore, it is arranged in the central plane where the web of the beam is located, and the secondary input gear is meshed with the primary transmission gear of the primary drive, and the secondary output gear is meshed with the tertiary input gear of the tertiary drive on the left and right sides of the web. Therefore, the secondary transmission shaft, the secondary input gear and the secondary output gear have the same rotation speed, and the rotation speed is less than the rotation speed of the primary transmission shaft, and the driving torque transmitted from the primary drive is transmitted from the secondary input gear to the secondary output gear via the secondary transmission shaft, and then transmitted from the secondary output gear to the two tertiary input gears of the tertiary drive.

[0013] Furthermore, the three-stage drive needs to transmit the driving torque to the upper and lower four driving screws on both sides of the web at the same time, so the three-stage drive is symmetrically arranged on the left and right sides of the web, and the two three-stage transmission shafts are respectively installed in the three-stage shaft supports on the left and right sides of the web; the two three-stage input gears are simultaneously meshed with the two-stage output gears of the two-stage drive, and each three-stage output gear is respectively meshed with the gears on the upper and lower driving screws on one side of the web, so the two three-stage transmission shafts, the two three-stage input gears and the two three-stage output gears have the same rotation speed, and the rotation speed is less than the rotation speed of the two-stage transmission shaft, and the driving torque transmitted from the two-stage drive is transmitted to the three-stage output gear through the three-stage transmission shaft by the three-stage input gear, and the three-stage output gear then transmits the driving torque to the driving screw.

[0014] Furthermore, the support plate is a plane wall plate, i.e. a reinforcement plate, on which a motor support, a primary shaft support, a secondary shaft support and a tertiary shaft support are welded; the secondary drive is arranged on the central plane where the web is located, and the two reinforcement plates are symmetrically mounted on the web of the wing beam fixed section by screws, and holes are opened in the web and the support plate to reserve installation space for the shaft and gear of the secondary drive, the height of the shaft hole is greater than the diameter of the shaft, the length of the shaft hole is equal to the shaft length, and a hole with a width greater than the gear width and a height greater than the gear diameter is reserved at the position where the gear is located to cooperate with the bushing to install the secondary transmission shaft; the bushing is an annular cylinder, and in order to ensure smooth contact between the secondary shaft support and the secondary transmission shaft, the aperture of the secondary shaft support can be set larger than the diameter of the secondary transmission shaft, and then the secondary transmission shaft and the bushing are installed together in the shaft support, so that the bushing fills the gap between the secondary shaft support hole and the secondary transmission shaft to compensate for the diameter.

[0015] Furthermore, the primary shaft support is welded on one side of the support plate; the secondary shaft support is symmetrically welded on the support plates on the left and right sides of the web, and the interior of the secondary shaft support forms a circle with the web and the support plate, and the diameter of the circle is larger than the diameter of the secondary transmission shaft, so that the bushing can be installed inside; when installing the secondary drive, the support plate on one side can be first installed on the web with screws and the support on that side can be welded, and then the bushing on the secondary drive can be placed in the corresponding position, and then the support plate on the other side can be installed with screws and the shaft support on the other side can be welded; the tertiary shaft support is also symmetrically welded on the support plates on the left and right sides of the web.

[0016] The beneficial effects of the present invention compared with the prior art are: The driving device of the present invention has the advantages of simple structure, high transmission efficiency, good synchronization, and convenient installation. The present invention provides a simple and reliable driving solution, which makes the front and rear beams outside a certain spanwise position of the wing deflect upward or downward, so that this part of the wing produces active clockwise or counterclockwise torsional deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front and rear beam deflection of a drive device for generating wing torsion according to the present invention; Figure 2 It is a schematic structural diagram of a driving device for generating wing torsion according to the present invention; Figure 3 It is a schematic diagram of the thread transmission part of a driving device for generating wing torsion of the present invention; Figure 4 It is a primary drive schematic diagram of a drive device for generating wing torsion of the present invention; Figure 5 It is a schematic diagram of a two-stage drive of a drive device for generating wing torsion of the present invention; Figure 6 It is a schematic diagram of a three-stage drive of a drive device for generating wing torsion of the present invention; Figure 7 It is a schematic diagram of a support plate of a driving device for generating wing torsion of the present invention; Among them, 1-fixed section, 2-movable section, 3-threaded transmission part, 4-third-stage drive, 5-support plate, 6-secondary drive, 7-first-stage drive, 8-nut, 9-support block, 10-drive screw, 11-drive gear, 12-stopper, 13-first-stage shaft support, 14-motor support, 15-first-stage transmission gear, 16-first-stage transmission shaft, 17-motor, 18-secondary input gear, 19-secondary transmission shaft, 20-secondary shaft support, 21-secondary output gear, 22-bushing, 23-third-stage input gear, 24-third-stage transmission shaft, 25-third-stage shaft support, 26-third-stage output gear, 27-sleeve, 28-drive screw center axis, 29-reinforcement plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail by enumerating examples below. It should be noted that the specific implementation described here is only used to explain the present invention and is not used to limit the present invention.

[0019] The wing torsion drive device of the present invention drives the portion of the wing front and rear beams other than a certain spanwise position to deflect upward or downward, thereby causing this portion of the wing to undergo active clockwise or counterclockwise torsion deformation, such as Figure 1As shown. A hinge point is set at a spanwise position of the driven wing spar, and the wing spar is divided into a fixed section 1 and a movable section 2. The webs of the two sections are hinged by single and double ears. The upper and lower edge strips on the left and right sides of the web are connected by four driving screws 10 respectively, and the thread direction of the upper edge strip driving screw 10 is opposite to the thread direction of the lower edge strip driving screw 10. Therefore, the driving screws 10 of the upper and lower edge strips will generate axial forces in opposite directions when working, and the axial forces in opposite directions form a force couple to drive the movable section 2 of the wing spar to deflect around the hinge point, and the upward and downward deflection of the front and rear beams of the wing around the hinge point will cause the movable section 2 of the wing to twist.

[0020] The wing torsion drive device of the present invention mainly includes a threaded transmission part 3 and a transmission drive part; wherein the threaded transmission part 3 includes: a nut 8, a support block, a stopper 12 and a driving screw 10; the transmission drive part includes: a motor 17, a primary drive 7, a secondary drive 6, a tertiary drive 4, and a support plate 5. The threaded transmission part 3 connects the upper and lower edge strips on the left and right sides of the web of the fixed section 1 and the movable section 2 and transmits axial force. After being driven, the threaded transmission part 3 will produce a relative displacement to deflect the movable section 2 of the wing beam around the hinge point; the transmission drive part is arranged in the fixed section 1 of the wing beam, and each level of drive has a corresponding shaft, input gear, output gear and shaft support. Each level of shaft support and motor support 14 are installed on the support plate 5. The driving torque of the motor 17 is transmitted to the primary drive 7, and the primary drive 7 then transmits the driving torque to the secondary drive 6. The secondary drive 6 transmits the driving torque to the tertiary drive 4, and the tertiary drive 4 outputs the driving torque to the threaded transmission part 3. Figure 2 As shown (2 (a) is the front view of the driving device, 2 (b) is the AA cross-sectional view of the driving device, 2 (c) is the BB cross-sectional view, 2 (d) is the CC cross-sectional view, and 2 (e) is the DD cross-sectional view).

[0021] The sleeve 27 is a circular cylinder, which is installed on the transmission shaft between the input gear and the output gear of each level of driving, and axially positions the input gear and the output gear. The inner diameter of the sleeve 27 is equal to the diameter of the transmission shaft, and the outer diameter of the sleeve is slightly larger than the diameter of the transmission shaft. The length of the sleeve is equal to the spacing between the input gear and the output gear. (If there are other positioning methods, the sleeve can be used for positioning without using the sleeve).

[0022] The nut 8 has a quadrangular prism shape, one bottom surface of which is welded to the upper and lower edge strips on the left and right sides of the web of the wing beam movable section 2, and one side surface is welded to the web. The nut 8 cooperates with the threaded portion of the driving screw 10, and the thread directions of the nut 8 of the upper and lower edge strips are opposite. When each driving screw 10 is subjected to the driving torque, axial forces in opposite directions will be generated in the thread pairs of the upper and lower edge strips. This pair of axial forces in opposite directions forms a force couple to drive the movable section 2 of the beam to deflect around the hinge point.

[0023] The support block 9 is in the shape of a quadrangular prism, one bottom surface of which is welded to the upper and lower edge strips on the left and right sides of the web of the spar movable section 2, and one side surface is welded to the web, with a circular through hole in the middle. The driving screw 10 passes through the circular through hole, and the boss on the driving screw 10 contacts the side of the support block, which prevents the driving screw 10 from axial displacement when the driving screw 10 rotates; Figure 3 shown.

[0024] The stopper 12 is a quadrangular prism, one bottom surface of which is welded to the upper and lower edge strips on the left and right sides of the web of the spar movable section 2, and one side surface is welded to the web, with a circular depression in the middle, so that one end of the driving screw 10 can be inserted into it, so as to prevent the driving screw 10 from axial displacement and radial swing; Figure 3 shown.

[0025] The driving screw 10 is shaped as follows: Figure 3 As shown, it is divided into 6 parts, the first part is the threaded end adapted to the nut 8, the second part is a circular polished rod, the third part is a circular boss, the fourth part is a circular polished rod, the fifth part is a driving gear 11 for receiving the driving torque, and the sixth part is a smooth end extending into the circular recess of the block.

[0026] The driving gear 11 is located between the smooth end of the driving screw 10 and the round polished rod. The diameter of the driving gear is larger than the diameter of the driving screw. The diameter of the driving gear should be guaranteed not to interfere with the upper and lower spar and the web of the wing beam. The diameter of the driving gear is not much different from the diameter of the driving screw. The driving gear 10 and the driving screw 11 are made into an integrated form, so the driving gear is regarded as a part of the driving screw. The central axis 28 of the driving screw is the straight line where the central axis of the driving screw 10 is located.

[0027] The structure of the first-stage driver 7 is as follows Figure 4 As shown (4 (a) is a front view of the primary drive, and 4 (b) is a top view of the primary drive). The primary drive 7 is located on one side of the web of the fixed section 1 beam. The primary transmission shaft 16 is connected to the motor 17 to receive the output torque and rotation speed of the motor 17. The primary transmission gear 15 is meshed with the secondary input gear 18 of the secondary drive 6. Therefore, the rotation speed of the primary transmission shaft 16 and the primary transmission gear 15 is the same as the output speed of the motor 17, and the driving torque of the motor 17 is transmitted to the primary transmission gear 15 through the primary transmission shaft 16, and the primary transmission gear 15 then transmits the driving torque to the secondary input gear 18.

[0028] The structure of the secondary drive 6 is as follows Figure 5As shown (5 (a) is the front view of the secondary drive, and 5 (b) is the top view of the secondary drive). The secondary drive 6 needs to distribute the torque of the motor 17 to the tertiary drive 4 on both sides of the web and synchronize them. Therefore, it is set in the central plane where the web of the beam is located. The secondary input gear 18 is meshed with the primary transmission gear 15 of the primary drive 7, and the secondary output gear 21 is meshed with the tertiary input gear 23 of the tertiary drive 4 on the left and right sides of the web. Therefore, the secondary transmission shaft 19, the secondary input gear 18 and the secondary output gear 21 have the same rotation speed, and the rotation speed is less than the rotation speed of the primary transmission shaft 16, and the driving torque transmitted from the primary drive 7 is transmitted from the secondary input gear 18 to the secondary output gear 21 via the secondary transmission shaft 19, and then transmitted from the secondary output gear 21 to the two tertiary input gears 23 of the tertiary drive 4.

[0029] The three-stage drive 4 structure is as follows Figure 6 As shown (6 (a) is the front view of the three-stage drive, and 6 (b) is the top view of the three-stage drive). The three-stage drive 4 needs to transmit the driving torque to the upper and lower four driving screws 10 on both sides of the web at the same time, so the three-stage drive 4 is symmetrically arranged on the left and right sides of the web, and two three-stage transmission shafts 24 are respectively installed in the three-stage shaft supports 25 on the left and right sides of the web; the two three-stage input gears 23 are simultaneously meshed with the secondary output gear 21 of the secondary drive 6, and each three-stage output gear 26 is respectively meshed with the gears on the upper and lower driving screws 10 on one side of the web, so the two three-stage transmission shafts 24, the two three-stage input gears 23 and the two three-stage output gears 26 have the same rotation speed, and the rotation speed is less than the rotation speed of the secondary transmission shaft 19, and the driving torque transmitted from the secondary drive 6 is transmitted from the three-stage input gear 23 to the three-stage output gear 26 through the three-stage transmission shaft 24, and the three-stage output gear 26 then transmits the driving torque to the driving screw 10.

[0030] The support plate 5 is a plane wall plate, namely a reinforcing plate 29, on which the motor support 14, the primary shaft support 13, the secondary shaft support 20 and the tertiary shaft support 25 are welded. Figure 7 As shown, since the secondary drive 6 is arranged on the central plane where the web is located, two reinforcing plates 29 are symmetrically installed on the web of the wing beam fixed section 1 by screws, and holes are opened in the web and the support plate 5 to leave installation space for the shaft and gear of the secondary drive 6. The height of the shaft hole is greater than the diameter of the shaft, and the length of the shaft hole is equal to the length of the shaft. A hole with a width greater than the width of the gear and a height greater than the diameter of the gear is reserved at the position where the gear is located to cooperate with the bushing 22 to install the secondary transmission shaft 19. The bushing 22 is an annular cylinder. In order to ensure smooth contact between the secondary shaft support and the secondary transmission shaft, the aperture of the secondary shaft support can be set larger than the diameter of the secondary transmission shaft, and then the secondary transmission shaft and the bushing 22 are installed together in the shaft support, so that the bushing 22 fills the gap between the shaft support hole and the shaft to compensate for the diameter.

[0031] The cross-sectional shape and installation position of the primary shaft support 13 or the motor support 14 are as follows: Figure 7 As shown in FIG. 7 (a) is a schematic diagram of the support plate and each support, FIG. 7 (b) is a support plate, FIG. 7 (c) is a cross-sectional view of the secondary shaft support AA, FIG. 7 (d) is a cross-sectional view of the tertiary shaft support BB, and FIG. 7 (e) is a cross-sectional view of the motor support or the primary shaft support CC), it is welded to one side of the support plate 5. The cross-sectional shape and installation position of the secondary shaft support 20 are shown in FIG. Figure 7 As shown, the shaft support is symmetrically welded to the support plates 5 on the left and right sides of the web. The inside of the shaft support forms a circle with the web and the support plate 5. The diameter of the circle is larger than the diameter of the secondary transmission shaft 19, so that the bushing 22 can be installed inside. When installing the secondary drive 6, the support plate 5 on one side can be installed with screws on the web and the support on that side can be welded. Then, the secondary drive 6 can be covered with the bushing 22 and placed in the corresponding position. Then, the support plate 5 on the other side can be installed with screws and the shaft support on the other side can be welded. The cross-sectional shape and installation position of the tertiary shaft support 25 are shown in FIG. Figure 7 As shown, it is symmetrically welded to the support plates 5 on the left and right sides of the web.

[0032] The working method of a driving device for generating wing torsion of the present invention is as follows: A hinge point is set at a certain spanwise position of the front and rear beams of the wing, and the front and rear beams are divided into a fixed section 1 and a movable section 2. The webs of the two sections of the beams are hinged by single and double ears, and the upper and lower edge strips on the left and right sides of the web are connected by four driving screws 10 respectively, and the thread direction of the upper edge strip driving screw 10 is opposite to the thread direction of the lower edge strip driving screw 10. Therefore, when the driving screws 10 of the upper and lower edge strips are subjected to the driving torque, axial forces in opposite directions will be generated in the thread pair. The axial forces in opposite directions form a couple to drive the movable section 2 of the wing beam to deflect around the hinge point, and the upward and downward deflection of the front and rear beams of the wing around the hinge point will cause the movable section 2 of the wing to be torsional and deformed; in order to make each driving screw 10 be subjected to the same driving torque at the same time The power torque makes the driving of each driving screw 10 to the beam synchronous, so a transmission driving part is set to transmit the driving torque to the driving screw 10; the motor 17 outputs the driving torque to the primary transmission shaft 16, and the driving torque is transmitted to the secondary transmission shaft 19 through the meshing of the primary gear and the secondary input gear 18, and the driving torque on the secondary transmission is transmitted to the two tertiary transmission shafts 24 through the meshing of the secondary output gear 21 and the two tertiary input gears 23, and the two tertiary transmission shafts 24 output the driving torque to the driving screws 10 through the meshing of the tertiary output gear 26 and the gears on the two driving screws 10, so that the four driving screws 10 are synchronously subjected to the same driving torque.

[0033] The specific implementation modes of the present invention are further described in detail below through data examples.

[0034] A double-beam straight wing is selected for torsion drive so that the torsion angle of the active deformation of the wing tip reaches 20°, and the dimensions of the drive device arranged in the front and rear beam parts are designed. Assume that the span length of the double-beam wing from the wing tip to the wing root is 4100mm; the chord length of the airfoil is 1400mm, the front beam is arranged at 30% of the chord length of the airfoil, and the rear beam is arranged at 65% of the chord length of the airfoil. The front beam bears 70% of the bending moment load on the wing, and the rear beam bears 30% of the bending moment load on the wing. A hinge point is set at 2100mm from the wing root in the span direction, so that the wing section 2000mm long outside the hinge point can achieve torsional deformation. The front and rear beams are I-section beams, the beam flange thickness at 2100mm in the span direction is 5mm, the web thickness is 3mm, the flange width is 80mm, and the web height is 120mm; If the torsion angle of the active deformation of the wing tip reaches 20°, the front and rear beams need to be able to reach a deflection angle of 3°; assuming that the maximum bending moment at the wing hinge is 15000N•m, the bending moment borne by the front beam is 10500N•m, and the bending moment borne by the rear beam is 4500N•m; here it is assumed that the threaded transmission part is made of alloy material with a strength of about 500MPA, and the thread lead angle of the front and rear beam thread pair is 2.5° and the equivalent friction angle is 7°. According to the strength theory, the front and rear beam drive screws are selected with a diameter of 12mm, a trapezoidal tooth profile, a pitch of 3mm, a tooth profile height of 1.5mm, a thread segment length of 30mm, and a spacing of 40mm at the edge strip disconnection, that is, the spacing between the nut and the support block is 40mm. The drive screw has a drive screw boss with a diameter of 20mm and a thickness of 10mm on the drive screw, which is 60mm away from the thread segment. The boss is 10mm thick and has a straight The driving screw gear has a diameter of 22mm, the gear tooth thickness is 15mm, the number of teeth is 22, the length of the rear rod of the gear is 15mm, and the total length of the driving screw is 130mm; the block, support block and nut are all rectangular blocks of 20×28×39mm, the direction of 20mm is the direction of the axis of the driving screw, the direction of 28mm is the direction of the web height, and the direction of 39mm is the width of the edge strip; one side of 20×39mm is welded on the edge strip, and the side of 20×28mm is welded on the web, on its 39×28mm surface, with a point 12mm away from the two edge lines away from the web and the edge strip as the center of the circle, the nuts of the lower edge strip of the front beam and the upper edge strip of the rear beam have clockwise threaded holes, while the upper edge strip of the front beam and the lower edge strip of the rear beam have counterclockwise threaded holes, the block has a circular depression with a diameter of 12mm and a depth of 5mm, and the support block has a circular through hole with a diameter of 12.3mm.

[0035] The strength of the transmission drive part material is 500MPA, the support plate is made of 3mm thick metal plate with a maximum height of 100mm and a maximum length of 180mm, and is installed on the web with screws; the first-level transmission gear of the front and rear beams has a diameter of 15mm and a thickness of 15mm, the first-level transmission shaft has a diameter of 9mm and a length of 70mm, and the center axis of the first-level shaft support is 55mm away from the center plane of the web and is 10mm thick; the second-level input gear has a diameter of 45mm and a thickness of 10mm, the second-level output gear has a diameter of 20mm and a thickness of 15mm, the second-level transmission shaft has a diameter of 12mm and a length of 80mm, the second-level shaft support is 10mm wide, the inner circle has a diameter of 18mm, and the bushing is a ring with an outer diameter of 18mm and an inner diameter of 12mm installed in the second-level shaft support; the third-level input gear has a diameter of 80mm and a thickness of 10mm, and the third-level output gear has a diameter of 20mm and a thickness of 15mm. The diameter of the first-stage output gear is 76mm and the thickness is 10mm. The diameter of the third-stage transmission shaft is 20mm and the length is 80mm. The corresponding third-stage shaft support center axis is 70mm thick and 10mm away from the center plane of the web; the torque on the first-stage transmission shaft of the front beam is 14.3N•m, and a stepper motor that can output at least 14.3N•m of torque is selected. The torque on the first-stage transmission shaft of the rear beam is 6.1N•m, and a stepper motor that can output at least 6.1N•m of torque is selected. The center axis of the motor support is 55mm thick and 10mm away from the center plane of the web; there is a 90mm long and 18mm wide hole at the midline position of the web and the support plate to leave installation space for the secondary transmission shaft, and there are 22mm high 17mm and 12mm high 47mm holes at the locations of the secondary output and input gears.

[0036] When installing the threaded transmission part, first weld the nut to the movable section of the beam, weld the support block to the fixed section of the beam, connect the web of the fixed end and the movable section through the hinge point, install the drive screw, connect the beam edge strip, and finally weld the block to the corresponding position. When installing the transmission drive part, first weld the secondary shaft support and the tertiary shaft support to the support plates on both sides, weld the primary shaft support to the support plate on one side, install the support plate on one side on the web with screws, and then assemble the secondary drive (including the secondary transmission shaft, secondary input gear, and secondary output gear) and install it at the position of the web midplane, and install the support plate on the other side with screws; place the tertiary input gear, the tertiary output gear and the sleeve in the position, and then pass the tertiary transmission shaft through and perform axial positioning of the tertiary transmission shaft to complete the installation of the tertiary drive; install the primary drive on the primary shaft support, assemble the motor and the motor support together, and then connect the motor and the primary transmission shaft with a coupling, and finally weld the motor support on the support plate according to its position. After receiving the drive command, the front beam motor outputs a driving torque greater than 14.3N•m, and the rear beam motor outputs a driving torque greater than 6.1N•m. The upper edge strip of the front beam and the lower edge strip of the rear beam drive the screw to move in the direction of screwing the nut out, and the lower edge strip of the front beam and the upper edge strip of the rear beam drive the screw to move in the direction of screwing the nut in. The front beam deflects downward by 3°, and the rear beam deflects upward by 3°, causing the wing tip to twist by 20°, even if the angle of attack is reduced by 20°.

[0037] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A drive device for generating wing torsion, characterized in that: The driving device drives the portion of the front and rear beams of the wing outside a certain spanwise position to deflect upward or downward, thereby causing this portion of the wing to actively produce clockwise or counterclockwise torsional deformation; a hinge point is provided at a certain spanwise position of the driven wing beam, dividing the wing beam into a fixed section (1) and a movable section (2); The wing twisting drive device comprises a threaded transmission part (3) and a transmission drive part; The threaded transmission part (3) comprises: a nut (8), a support block (9), a driving screw (10), and a stopper (12); The transmission drive part comprises: a motor (17), a primary drive (7), a secondary drive (6), a tertiary drive (4), a support plate (5), and shafts, input gears, output gears and shaft supports corresponding to the primary drive (7), the secondary drive (6) and the tertiary drive (4), and a motor support (14) corresponding to the motor (17); The threaded transmission part (3) connects the upper and lower edge strips on the left and right sides of the web of the fixed section (1) and the movable section (2) and transmits the axial force. When the threaded transmission part (3) is driven, a relative displacement is generated to deflect the movable section of the spar around the hinge point. The transmission drive part is arranged in the fixed section (1) of the wing beam. The drive shaft supports and motor supports (14) of each level are mounted on the support plate (5), the driving torque of the motor (17) is transmitted to the primary drive (7), the primary drive (7) transmits the driving torque to the secondary drive (6), the secondary drive (6) transmits the driving torque to the tertiary drive (4), and the tertiary drive (4) outputs the driving torque to the threaded transmission part (3).

2. A driving device for generating wing twisting according to claim 1, characterized in that: The webs of the front and rear beams of the wing are hinged by single and double ears, and the upper and lower spar on the left and right sides of the web are respectively connected by four driving screws (10), and the thread direction of the upper spar driving screw is opposite to the thread direction of the lower spar driving screw. Therefore, when the driving screws of the upper and lower spar are working, axial forces in opposite directions are generated, and the axial forces in opposite directions form a force couple to drive the active section of the wing beam to deflect around the hinge point, and the upward and downward deflection of the front and rear beams of the wing around the hinge point will cause the active section of the wing to twist.

3. A driving device for generating wing torsion according to claim 1, characterized in that: The driving screw (10) is divided into 6 parts, the first part is a threaded end adapted to the nut (8), the second part is a circular polished rod, the third part is a circular boss, the fourth part is a circular polished rod, the fifth part is a driving gear (11) for receiving the driving torque, and the sixth part is a smooth end extending into the circular recess of the stopper.

4. A driving device for generating wing torsion according to claim 3, characterized in that: The nut (8) is in the shape of a quadrangular prism, one bottom surface of which is welded to the upper and lower edge strips on the left and right sides of the web of the wing beam movable section, and one side surface is welded to the web. The nut (8) cooperates with the threaded portion of the driving screw (10), and the thread directions of the nuts (8) of the upper and lower edge strips are opposite. When each driving screw (10) is acted upon by a driving torque, axial forces in opposite directions are generated in the thread pairs of the upper and lower edge strips. The axial forces in opposite directions form a force couple to drive the movable section of the beam to deflect around the hinge point. The support block (9) is in the shape of a quadrangular prism, one bottom surface of which is welded to the upper and lower edge strips on the left and right sides of the web of the wing beam movable section, and one side surface is welded to the web, with a circular through hole in the middle; the driving screw (10) passes through the circular through hole, and the boss on the driving screw (10) contacts the side surface of the support block (9), so that when the driving screw (10) rotates, the driving screw (10) is prevented from axial displacement; The stopper (12) is a quadrangular prism, one bottom surface of which is welded to the upper and lower edge strips on the left and right sides of the web of the spar movable section, and one side surface is welded to the web. A circular recess is provided in the middle, allowing one end of the driving screw (10) to extend therein, thereby preventing the driving screw (10) from axial displacement and radial swinging.

5. A driving device for generating wing twisting according to claim 1, characterized in that: The shaft, gear and shaft support corresponding to the primary drive (7) are: a primary transmission shaft (16), a primary transmission gear (15), and a primary shaft support (13); The shafts, gears and shaft supports corresponding to the secondary drive (6) are: a secondary transmission shaft (19), a secondary input gear (18), a secondary output gear (21), and a secondary shaft support (20); The shafts, gears and shaft supports corresponding to the three-stage drive (4) are respectively: a three-stage transmission shaft (24), a three-stage input gear (23), a three-stage output gear (26) and a three-stage shaft support (25).

6. A driving device for generating wing torsion according to claim 5, characterized in that: The primary drive (7) is located on one side of the web of the fixed section beam, the primary transmission shaft (16) is connected to the motor (17) and receives the output torque and rotation speed of the motor (17), the primary transmission gear (15) is meshed with the secondary input gear (18) of the secondary drive (6), so that the rotation speed of the primary transmission shaft (16) and the primary transmission gear (15) is the same as the output rotation speed of the motor (17), and the driving torque of the motor (17) is transmitted to the primary transmission gear (15) through the primary transmission shaft (16), and the primary transmission gear (15) then transmits the driving torque to the secondary input gear (18).

7. A driving device for generating wing torsion according to claim 5, characterized in that: The secondary drive (6) is to distribute the torque of the motor (17) to the tertiary drive (4) on both sides of the web and synchronize them. Therefore, it is arranged in the central plane where the web of the beam is located. The secondary input gear (18) is meshed with the primary transmission gear (15) of the primary drive, and the secondary output gear (21) is meshed with the tertiary input gear (23) of the tertiary drive on the left and right sides of the web. Therefore, the secondary transmission shaft (19), the secondary input gear (18) and the secondary output gear (21) have the same rotation speed, and the rotation speed is less than the rotation speed of the primary transmission shaft (16). The driving torque transmitted from the primary drive (7) is transmitted from the secondary input gear (18) to the secondary output gear (21) via the secondary transmission shaft (19), and then transmitted from the secondary output gear (21) to the two tertiary input gears (23) of the tertiary drive (4).

8. A driving device for generating wing torsion according to claim 5, characterized in that: The three-stage drive (4) is to transmit the driving torque to the upper and lower four driving screws on both sides of the web at the same time, so the three-stage drive (4) is symmetrically arranged on the left and right sides of the web, and two three-stage transmission shafts (24) are respectively installed in the three-stage shaft supports (25) on the left and right sides of the web; the two three-stage input gears (23) are simultaneously meshed with the two-stage output gears (21) of the two-stage drive, and each three-stage output gear (26) is respectively meshed with the gears on the upper and lower driving screws on one side of the web, so that the two three-stage transmission shafts (24), the two three-stage input gears (23) and the two three-stage output gears (26) have the same rotation speed, and the rotation speed is less than the rotation speed of the two-stage transmission shaft (19), and the driving torque transmitted from the two-stage drive is transmitted from the three-stage input gear (23) to the three-stage output gear (26) through the three-stage transmission shaft (24), and the three-stage output gear (26) then transmits the driving torque to the driving screw (10).

9. A driving device for generating wing torsion according to claim 5, characterized in that: The support plate (5) is a plane wall plate, i.e., a reinforcing plate (29), on which a motor support (14), a primary shaft support (13), a secondary shaft support (20), and a tertiary shaft support (25) are welded; the secondary drive (6) is arranged on the central plane where the web is located, and two reinforcing plates (29) are symmetrically mounted on the web of the wing beam fixing section by screws, and holes are opened in the web and the support plate to leave installation space for the shaft and gear of the secondary drive, the height of the shaft hole is greater than the diameter of the shaft, and the length of the shaft hole is equal to the length of the shaft, and a hole with a width greater than the width of the gear and a height greater than the diameter of the gear is reserved at the position where the gear is located, so as to cooperate with the bushing (22) to install the secondary transmission shaft (19); The bushing (22) is a circular cylinder installed in the secondary shaft support, with an inner diameter equal to the diameter of the secondary transmission shaft, an outer diameter equal to the inner diameter of the secondary shaft support hole, and a length equal to the length of the secondary shaft support hole, so as to ensure smooth contact between the secondary shaft support and the secondary transmission shaft. The diameter of the secondary shaft support hole can be set larger than the diameter of the secondary transmission shaft, and then the secondary transmission shaft and the bushing are installed together in the secondary shaft support, so that the bushing fills the gap between the secondary support hole and the secondary transmission shaft to compensate for the diameter.

10. A driving device for generating wing twisting according to claim 9, characterized in that: The primary shaft support (13) is welded to one side of the support plate (5); the secondary shaft support (20) is symmetrically welded to the support plates (5) on the left and right sides of the web, the interior of the secondary shaft support (20) forms a circle with the web and the support plate, the diameter of the circle is larger than the diameter of the secondary transmission shaft (19), so that the bushing (22) can be installed inside; when installing the secondary drive (6), the support plate on one side can be first installed on the web with screws and the support on that side can be welded, then the bushing (22) on the secondary drive (6) can be placed in the corresponding position, and then the support plate on the other side can be installed with screws and the shaft support on the other side can be welded; the tertiary shaft support (25) is also symmetrically welded to the support plates on the left and right sides of the web.

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