Parallel type turning shimmy damping system

Abstract

The invention discloses a parallel type turning and shimmy damping system which comprises a turning mechanism and a shimmy damper, and one output end of the turning mechanism and one output end of the shimmy damper are connected to the two sides of an outer cylinder of a buffering supporting column. The other output end of the turning mechanism and the other output end of the shimmy damper are both connected with a rotating sleeve of a front wheel swinging part through a first transmission device and a second transmission device, an outer cylinder of the buffer supporting column is rotationally connected with the rotating sleeve, and when the unmanned aerial vehicle is in a turning mode, the turning mechanism is powered on to be closed; the output end of the motor transmits the torque output by the motor to the front wheel swinging part through the first transmission device, so that the front wheel is deflected; when the unmanned aerial vehicle is in a shimmy damping mode, the output end of the shimmy damper transmits generated oil shimmy damping torque to the front wheel swing part through the second transmission device, and shimmy vibration of the front wheel is restrained. The parallel type turning shimmy damping system is compact in structural design, convenient to operate and reliable in installation.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) landing gear technology, and more particularly to a parallel turning anti-sway system. Background Technology

[0002] The nose landing gear's steering damping system is a crucial component of the UAV's landing gear, playing a vital role in correcting yaw and reducing yaw during ground taxiing. During low-speed taxiing, torque is transmitted through the nose wheel steering mechanism to control the steering of the nose wheel, thus meeting the UAV's ground maneuvering requirements. During high-speed taxiing, the damper activates, generating anti-yaw hydraulic damping torque to suppress nose wheel yaw. Therefore, a compact structure, ease of operation, and reliable installation are essential factors in ensuring the nose landing gear's ground correction and taxiing performance.

[0003] Therefore, how to design a parallel turning sway reduction system that is compact in structure, easy to operate, and reliable in installation is a topic that the inventor has devoted himself to researching. Summary of the Invention

[0004] The purpose of this invention is to provide a parallel turning sway reduction system, which has a compact structure, is easy to operate, and is reliable to install.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a parallel turning and sway reduction system, including a turning mechanism and a sway damper. The turning mechanism and the sway damper are connected to both sides of the outer cylinder of the buffer support. The output end of the turning mechanism is connected to the rotating sleeve of the front wheel swing part through a first transmission device, and the output end of the sway damper is connected to the rotating sleeve through a second transmission device. The outer cylinder of the buffer support is rotatably connected to the rotating sleeve. When the UAV is in turning mode, the turning mechanism is energized and engaged, and its output end transmits the torque output by the motor to the front wheel swing part through the first transmission device, causing the front wheel to deflect. When the UAV is in sway reduction mode, the output end of the sway damper transmits the generated hydraulic sway damping torque to the front wheel swing part through the second transmission device, suppressing the front wheel sway.

[0006] Preferably, the turning mechanism is provided with a first lug, and the sway damper is provided with a second lug. The first lug and the second lug are respectively rotatably connected to the support provided on the outer cylinder of the buffer support by bolts.

[0007] Preferably, the first transmission device includes an output gear located at the output end of the turning mechanism and a toothed portion disposed on the side of the rotating sleeve, wherein the output gear meshes with the toothed portion.

[0008] Preferably, a limiting block is provided between the outer cylinder of the buffer support and the rotating sleeve to restrict the rotation range of both.

[0009] Preferably, the second transmission device includes a lever located at the output end of the sway reducer. The lever is connected to the rotating sleeve via a linkage transmission assembly, and a parallelogram linkage mechanism is formed between the lever, the linkage transmission assembly, and the rotating sleeve.

[0010] Preferably, the linkage transmission assembly includes a first transmission rod, one end of which is connected to the lever via a spline, the other end of which is rotatably connected to one end of a connector, the other end of which is fixedly connected to one end of a second transmission rod, and the other end of which is rotatably connected to or bolted to the rotating sleeve.

[0011] Preferably, the first transmission rod is provided with a keyway, and the lever is connected to the first transmission rod by a spline to restrict radial relative rotation. The side wall of the first transmission rod is provided with a through hole, and a bolt passes through the through hole to achieve axial constraint on the first transmission rod and the lever.

[0012] Preferably, the connector adopts a U-shaped groove structure, and the other end of the first transmission rod is inserted into the opening of the connector. The two are connected by bolt threads, and a spherical bearing is installed between the connector and the first transmission rod.

[0013] Preferably, the other end of the second transmission rod is provided with a U-shaped interface, and the rotating sleeve is provided with a third lug. The third lug is inserted into the U-shaped interface, and the third lug is connected to the U-shaped interface by a bolt thread.

[0014] Preferably, the other end of the connector is threaded to one end of the second transmission rod, and a locking nut secures the two with double threads to prevent loosening. The connector, the locking nut, and the second transmission rod all have fuse holes through which fuses can pass.

[0015] After adopting the above solution, the beneficial effects of the parallel turning sway reduction system of the present invention are:

[0016] 1. This invention arranges the turning mechanism and the damper on both sides of the outer cylinder of the buffer support, achieving efficient use of space. The two ends of the turning mechanism and the two ends of the damper are respectively connected to the outer cylinder of the buffer support and the rotating sleeve, forming a parallel connection. When the UAV is in turning mode, the torque output by the motor is transmitted to the front wheel swing part through the first transmission device, thereby causing the front wheel to deflect. When the UAV is in damping mode, the output end of the damper transmits the generated hydraulic damping torque to the front wheel swing part through the second transmission device, suppressing the front wheel sway. Its structure is compact, easy to operate, and reliable to install.

[0017] 2. The present invention designs the first transmission device to adopt a gear transmission method, which meshes the output gear at the output end of the turning mechanism with the teeth set on the side of the rotating sleeve to achieve a larger reduction ratio and reduce the output torque requirement of the turning mechanism.

[0018] 3. The lever, linkage transmission assembly and rotating sleeve are connected to form a parallelogram linkage mechanism. This linkage mechanism realizes the integrated connection between the sway damper and the front wheel swing part, which can ensure a 1:1 transmission of the sway damping torque. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an embodiment of the parallel turning sway reduction system of the present invention;

[0020] Figure 2 This is a schematic diagram of an embodiment of the turning mechanism of the present invention;

[0021] Figure 3 This is a schematic diagram of an embodiment of the anti-sway device of the present invention.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0023] Numbering Explanation:

[0024] 1-Turn mechanism 2-Slip damper

[0025] 3-buffer strut outer cylinder 4-first lug

[0026] 5-Second ear 6-Support

[0027] 7-Front wheel swing section 8-Swivel sleeve

[0028] 9-Output gear 10-Teeth

[0029] 11-Limit block 12-Toggle lever

[0030] 13-First transmission rod 14-Through hole

[0031] 15-Joint 16-Spherical plain bearing

[0032] 17-Second transmission rod 18-U-shaped interface

[0033] 19-Third ear 20-Upper torsion arm

[0034] 21-Lower torque arm 22-Piston rod

[0035] 23-Wheel axle 24-Front wheel

[0036] 25- Locking nut Detailed Implementation

[0037] like Figure 1 The schematic diagram shown is a structural representation of a parallel turning and sway reduction system according to an embodiment of the present invention. It includes a turning mechanism 1 and a sway reducer 2. In this embodiment, the turning mechanism 1 and the sway reducer 2 are respectively located on the right and left sides of the outer cylinder 3 of the buffer support. (See reference...) Figure 2 , Figure 3 As shown, the upper left end of the turning mechanism 1 is provided with a first lug 4, and the upper right end of the sway reducer 2 is provided with a second lug 5. The first lug 4 and the second lug 5 are respectively threadedly connected to the support 6 provided on the outer cylinder of the buffer support column 3 by bolts.

[0038] The output end of the turning mechanism 1 is connected to the rotating sleeve 8 of the front wheel swing part 7 via the first transmission device, and the output end of the sway damper 2 is connected to the second transmission device. The outer cylinder 3 of the buffer support is rotatably connected to the rotating sleeve 8, realizing the parallel connection of the turning mechanism 1 and the sway damper 2.

[0039] Combination Figure 1 , Figure 2 As shown, the first transmission device includes an output gear 9 located at the output end of the turning mechanism 1 and a sector tooth 10 disposed on the side of the rotating sleeve 8. The output gear 9 meshes with the tooth 10. This arrangement can achieve a larger reduction ratio, reduce the output torque requirement of the turning mechanism 1, thereby reducing the design weight of the turning mechanism 1 and effectively saving space. (Reference) Figure 1 As shown, multiple staggered limiting blocks 11 are provided between the outer cylinder 3 of the buffer support and the rotating sleeve 8 to limit their rotation range. When the two rotate to their limit positions, the staggered adjacent limiting blocks 11 come into contact, thus providing a limiting protection function.

[0040] Combination Figure 1 , Figure 3As shown, the second transmission device includes a lever 12 located at the output end of the damper 2, which is connected to the rotating sleeve 8 via a linkage transmission assembly. The linkage transmission assembly includes a first transmission rod 13, one end of which is connected to the lever 12 via a spline. Specifically, the first transmission rod 13 has a keyway, and the lever 12 and the first transmission rod 13 are connected via a spline to restrict radial relative rotation. A through hole 14 is provided on the side wall of the first transmission rod 13, through which bolts pass to achieve axial constraint on the first transmission rod 13 and the lever 12. The other end of the first transmission rod 13 is rotatably connected to one end of a connector 15. The connector 15 adopts a U-shaped groove structure, and the other end of the first transmission rod 13 is inserted into the opening of the connector 15. The two are connected by bolt threads. A spherical bearing 16 is installed between the connector 15 and the first transmission rod 13 to ensure that there is a certain adjustment margin between the connector 15 and the first transmission rod 13. The other end of connector 15 is threaded to one end of the second transmission rod 17, and a locking nut 25 secures the two with double threads to prevent loosening. The other end of the second transmission rod 17 is provided with a U-shaped interface 18, and a third lug 19 is provided on the rotating sleeve 8. The third lug 19 is inserted into the U-shaped interface 18, and the third lug 19 is threadedly connected to the U-shaped interface 18 with a bolt. A parallelogram linkage mechanism is formed between the lever 12, the linkage transmission assembly, and the rotating sleeve 8 to ensure that the damping torque output by the sway damper 2 is transmitted 1:1 to the rotating sleeve 8 through the linkage transmission assembly.

[0041] The aforementioned connector 15, locking nut 18, and second transmission rod 17 all have fuse holes through which fuses can pass, allowing for anti-loosening measures.

[0042] The front wheel swing part 7 includes the aforementioned rotating sleeve 8, upper torque arm 20, lower torque arm 21, piston rod 22, wheel axle 23, front wheel 24, etc. The rotating sleeve 8 is rotatably connected to the upper torque arm 20, the upper torque arm 20 is rotatably connected to the lower torque arm 21, the lower torque arm 21 is rotatably connected to the piston rod 22, and the piston rod 22 is rotatably connected to the wheel axle 23. The front wheel 24 is mounted on the wheel axle 23.

[0043] When the drone is in a low-speed gliding state, the turning mechanism 1 switches to the turning state and is energized. The output end of the turning mechanism 1 transmits the torque output by the motor to the rotating sleeve 8 of the front wheel swing part 7 through the gear transmission between the output gear 9 and the gear 10 of the first transmission device. Then, through the upper torque arm 20, lower torque arm 21, piston rod 22 and other components, the torque is transmitted to the front wheel 24, causing the front wheel 24 to deflect and achieve front wheel turning. When the drone is in a high-speed gliding state, the turning mechanism 1 switches to the anti-sway state, the clutch is de-energized, the motor does not work, and the hydraulic anti-sway damping torque generated by the anti-sway device 2 is transmitted to the rotating sleeve 8 of the front wheel swing part 7 at a 1:1 ratio through the linkage transmission assembly of the second transmission device. The rotating sleeve 8 then transmits the torque to the front wheel 24 through the upper torque arm 20, lower torque arm 21, piston rod 22 and other components of the front wheel swing part 7, suppressing the occurrence of front wheel swaying. This achieves hydraulic anti-sway during the gliding phase.

[0044] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A parallel turning sway reduction system, characterized in that, The device includes a turning mechanism and a damper. The turning mechanism and the damper are connected to both sides of the outer cylinder of the buffer support. The output end of the turning mechanism is connected to the rotating sleeve of the front wheel swing part through a first transmission device, and the output end of the damper is connected to the second transmission device. The outer cylinder of the buffer support is rotatably connected to the rotating sleeve. When the UAV is in turning mode, the turning mechanism is energized and engaged. Its output end transmits the torque output by the motor to the front wheel swing part through the first transmission device, causing the front wheel to deflect. When the UAV is in damping mode, the output end of the damper transmits the generated hydraulic damping torque to the front wheel swing part through the second transmission device, suppressing the front wheel shimmy.

2. The parallel turning sway reduction system as described in claim 1, characterized in that, The turning mechanism is provided with a first lug, and the sway reducer is provided with a second lug. The first lug and the second lug are respectively rotatably connected to the support provided on the outer cylinder of the buffer support by bolts.

3. The parallel turning sway reduction system as described in claim 1, characterized in that, The first transmission device includes an output gear located at the output end of the turning mechanism and a toothed portion disposed on the side of the rotating sleeve, wherein the output gear meshes with the toothed portion.

4. A parallel turning sway reduction system as described in claim 1, characterized in that, A limiting block is provided between the outer cylinder of the buffer support and the rotating sleeve to restrict the rotation range of both.

5. A parallel turning sway reduction system as described in claim 1, characterized in that, The second transmission device includes a lever located at the output end of the sway reducer. The lever is connected to the rotating sleeve via a linkage transmission assembly, and a parallelogram linkage mechanism is formed between the lever, the linkage transmission assembly, and the rotating sleeve.

6. A parallel turning sway reduction system as described in claim 5, characterized in that, The linkage transmission assembly includes a first transmission rod, one end of which is connected to the lever via a spline, the other end of which is rotatably connected to one end of a connector, the other end of which is fixedly connected to one end of a second transmission rod, and the other end of which is rotatably connected to or bolted to the rotating sleeve.

7. A parallel turning sway reduction system as described in claim 6, characterized in that, The first transmission rod is provided with a keyway, and the lever is connected to the first transmission rod by a spline to restrict radial relative rotation. The side wall of the first transmission rod is provided with a through hole, and the bolt passes through the through hole to achieve axial constraint on the first transmission rod and the lever.

8. A parallel turning sway reduction system as described in claim 6, characterized in that, The connector adopts a U-shaped groove structure, and the other end of the first transmission rod is inserted into the opening of the connector. The two are connected by bolt threads, and a spherical bearing is installed between the connector and the first transmission rod.

9. A parallel turning sway reduction system as described in claim 6, characterized in that, The other end of the second transmission rod is provided with a U-shaped interface, and the rotating sleeve is provided with a third lug. The third lug is inserted into the U-shaped interface, and the third lug is connected to the U-shaped interface by a bolt thread.

10. A parallel turning sway reduction system as described in claim 6, characterized in that, The other end of the connector is connected to one end of the second transmission rod by a thread, and the two are secured by a locking nut to prevent loosening with double threads. The connector, the locking nut and the second transmission rod all have fuse holes for the fuse to pass through.

Images