Swing reducing device, undercarriage and aircraft

Abstract

The utility model relates to a shimmy damping device, an undercarriage and an aircraft. The shimmy damping device comprises a movable module, a sleeve, a friction piece and an adjusting module, and the movable module is rotatably arranged on a first supporting piece; the sleeve is rotatably arranged on the second supporting piece, the sleeve is arranged outside the movable module in a sleeving mode, and the movable module can reciprocate in the axis direction of the sleeve; the friction piece is arranged on the outer wall of the movable module and is in sliding fit with the inner wall of the sleeve; the adjusting module is arranged on the movable module and used for adjusting the friction force of the friction piece acting on the inner wall of the sleeve. Compared with the prior art, the shimmy damping device can prevent the rolling wheel from shimmy through friction damping generated by the friction piece and the inner wall of the sleeve, the overall weight and size of the structure are small, and therefore the flight safety of the small and light aircraft is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of aircraft, and in particular to a sway reduction device, landing gear, and aircraft. Background Technology

[0002] When an aircraft is taxiing, it typically adjusts its direction by changing the direction of its front wheels. When the aircraft's taxiing speed exceeds a critical speed, the front wheels will experience severe shimmy, leading to safety accidents such as tire tearing and landing gear breakage. To prevent such accidents, aircraft are usually equipped with shimmy dampers to eliminate shimmy during taxiing. Traditionally, hydraulic shimmy dampers are used to eliminate shimmy during taxiing. However, for small and lightweight aircraft such as drones, hydraulic shimmy dampers are relatively heavy and bulky, which can affect the flight safety of these aircraft. Utility Model Content

[0003] Therefore, it is necessary to provide a sway reduction device, landing gear, and aircraft to address the problem that the large weight and size of traditional hydraulic sway reducers affect the flight safety of small and light aircraft.

[0004] The technical solution is as follows:

[0005] One embodiment provides a sway reduction device for use on a landing gear, the landing gear including a first support member and a second support member, one end of the first support member being rotatably connected to one end of the second support member; the sway reduction device includes:

[0006] An active module, which is rotatably mounted on the first support member;

[0007] A sleeve is rotatably disposed on the second support member, the sleeve is sleeved outside the movable module, and the movable module is capable of reciprocating along the axial direction of the sleeve;

[0008] A friction element, wherein the friction element is disposed on the outer wall of the movable module and slides in engagement with the inner wall of the sleeve; and

[0009] An adjustment module is provided in the movable module, and the adjustment module is used to adjust the magnitude of the friction force exerted by the friction element on the inner wall of the sleeve.

[0010] In the aforementioned anti-sway device, when the rollers on the landing gear sway, the first and second supports rotate relative to each other, and the movable module reciprocates along the axis of the sleeve. At this time, the adjustment module increases the friction force exerted by the friction element on the inner wall of the sleeve, so that the frictional damping generated between the friction element and the inner wall of the sleeve can absorb the energy generated by the roller sway, thereby preventing the roller from swaying. When it is necessary to adjust the forward direction of the aircraft, the adjustment module decreases the friction force exerted by the friction element on the inner wall of the sleeve, so that the first support can rotate relative to the second support, thereby adjusting the forward direction of the roller. Compared with traditional technology, the aforementioned anti-sway device can prevent the roller from swaying through the frictional damping generated between the friction element and the inner wall of the sleeve. The overall weight and volume of the structure are small, thereby ensuring the flight safety of small and lightweight aircraft.

[0011] In one embodiment, the movable module includes a movable rod having a through-hole and a cavity. The through-hole is located on the side wall of the movable rod. The friction element has a moving part and a friction part. The moving part passes through the through-hole, and the friction part is located outside the cavity and slides against the inner wall of the sleeve. The adjustment module is located inside the cavity and abuts against the moving part, so that the moving part can reciprocate along the axial direction of the through-hole.

[0012] In one embodiment, the moving part is provided with a first sliding surface, which is set at an angle to the axial direction of the movable rod. The adjustment module includes a first abutting member and a driving member. The first abutting member is provided with a first abutting surface, which is set at an angle to the axial direction of the movable rod. The first abutting surface slides in cooperation with the first sliding surface. The driving member is driven to connect with the first abutting member, and the driving member can drive the first abutting member to reciprocate along the axial direction of the movable rod.

[0013] In one embodiment, the adjustment module further includes a screw, the first abutment member has a screw hole, one end of the screw is driven to be connected to the driving member, and the other end of the screw is screwed to the screw hole.

[0014] In one embodiment, the moving part is further provided with a second sliding surface, which is set at an angle to the first sliding surface and at an angle to the axial direction of the movable rod. The adjustment module further includes a second abutting member and an elastic member. The second abutting member is provided with a second abutting surface, which is set at an angle to the axial direction of the movable rod. The second abutting surface slides in conjunction with the second sliding surface. One end of the elastic member is located on the second abutting member, and the other end of the elastic member is located at the end of the movable rod.

[0015] In one embodiment, the adjustment module further includes a limiting member connected to the second abutting member, and the elastic member includes a spring sleeved on the outside of the limiting member.

[0016] In one embodiment, the movable module further includes a first connecting rod, a first ear seat is provided on the side wall of the first support member, one end of the first connecting rod is rotatably disposed on the first ear seat, and the other end of the first connecting rod is rotatably disposed on one end of the movable rod.

[0017] In one embodiment, the active module further includes a second connecting rod, a second ear seat is provided on the side wall of the second support member, the sleeve is rotatably disposed on the second ear seat, one end of the second connecting rod is rotatably disposed on the end of the first connecting rod away from the first ear seat, and the other end of the second connecting rod is rotatably disposed on the second ear seat.

[0018] Another embodiment of this application provides a landing gear that includes the anti-sway device as described above.

[0019] Another embodiment of this application provides an aircraft including a fuselage, rollers, and landing gear as described above, one end of which is connected to the fuselage and the other end of which is connected to the rollers. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the anti-sway device when it is installed on the landing gear in one embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the anti-sway device at another angle in one embodiment of this application when it is installed on the landing gear.

[0023] Figure 3 This is a schematic diagram of the landing gear when it is not shimming.

[0024] Figure 4 This is a schematic diagram of the roller deflecting in one direction.

[0025] Figure 5 This is a schematic diagram of the roller deflecting in the other direction.

[0026] Figure 6 This is a schematic diagram of the internal structure of the anti-sway device.

[0027] Figure 7 This is a schematic diagram of the structure of a friction element disposed on a movable rod in one embodiment of this application.

[0028] Figure 8 This is a schematic diagram of the structure in which the movable part is disposed in the mounting through hole in one embodiment of this application.

[0029] Figure 9 This is a schematic diagram illustrating the cooperation between the moving part and the adjustment module in one embodiment of this application.

[0030] Figure 10 This is a schematic diagram illustrating the cooperation between the moving part and the first and second contact surfaces in one embodiment of this application.

[0031] Attached image annotations:

[0032] 10. Anti-sway device; 100. Movable module; 110. Movable rod; 111. Mounting through hole; 112. Mounting cavity; 120. First connecting rod; 130. Second connecting rod; 200. Sleeve; 300. Friction component; 310. Moving part; 311. First sliding surface; 312. Second sliding surface; 320. Friction component; 400. Adjustment module; 410. First abutting member; 411. First abutting surface; 412. First through groove; 420. Second abutting member; 421. 422. Second abutment surface; 430. Second through groove; 440. Driving component; 450. Screw; 460. Elastic component; 47. Limiting component; 20. Landing gear; 21. First support component; 22. Second support component; 23. First end; 24. Second end; 25. Third end; 26. Fourth end; 27. First ear seat; 28. Second ear seat; 29. ​​Third ear seat; 30. Roller; 40. Steering mechanism; 41. Drive motor; 42. Transmission wheel; 43. Semi-annular rack. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] The aircraft includes a fuselage, landing gear 20, and wheels 30. Please refer to [link / reference]. Figure 1 The landing gear 20 includes a first support member 21 and a second support member 22. The first support member 21 has a first end 23 and a second end 24 opposite to each other. The second support member 22 has a third end 25 and a fourth end 26 opposite to each other. The first end 23 is used to connect with one of the fuselage and the roller 30. The second end 24 is connected with the third end 25. The fourth end 26 is used to connect with the other of the fuselage and the roller 30.

[0040] Please see Figures 1 to 6 One embodiment of this application provides a sway reduction device 10, including a movable module 100, a sleeve 200, a friction element 300, and an adjustment module 400. The movable module 100 is rotatably disposed on a first support member 21; the sleeve 200 is rotatably disposed on a second support member 22, and the sleeve 200 is sleeved outside the movable module 100, and the movable module 100 can reciprocate along the axial direction of the sleeve 200; the friction element 300 is disposed on the outer wall of the movable module 100 and slides in cooperation with the inner wall of the sleeve 200; the adjustment module 400 is disposed on the movable module 100, and the adjustment module 400 is used to adjust the magnitude of the friction force exerted by the friction element 300 on the inner wall of the sleeve 200.

[0041] The aforementioned anti-sway device 10, when the roller 30 on the landing gear 20 oscillates, causes the first support member 21 and the second support member 22 to rotate relative to each other, and the movable module 100 to reciprocate along the axis of the sleeve 200. At this time, the adjustment module 400 increases the frictional force of the friction member 300 acting on the inner wall of the sleeve 200, so that the frictional damping generated between the friction member 300 and the inner wall of the sleeve 200 can absorb the energy generated by the swaying of the roller 30, thereby preventing the roller 30 from oscillating; when needed... When adjusting the forward direction of the aircraft, the adjustment module 400 reduces the friction force exerted by the friction element 300 on the inner wall of the sleeve 200, so that the first support 21 can rotate relative to the second support 22, thereby adjusting the forward direction of the roller 30. Compared with conventional technology, the above-mentioned anti-sway device 10 can prevent the roller 30 from swaying by the friction damping generated between the friction element 300 and the inner wall of the sleeve 200. The overall weight and volume of the structure are small, thereby ensuring the flight safety of small and lightweight aircraft.

[0042] In one embodiment, the first end 23 is used for rotatable connection with the roller 30, and the second end 24 is used for connection with the fuselage of the aircraft.

[0043] Furthermore, when the rollers 30 on the landing gear 20 oscillate, the rollers 30 will swing violently from side to side (e.g., Figure 4 and Figure 5 As shown in the figure, the first support member 21 rotates clockwise and counterclockwise alternately relative to the second support member 22, causing the friction member 300 to move back and forth rapidly within the sleeve 200. At this time, the adjustment module 400 adjusts the friction member 300 to have a greater frictional force than applied within the sleeve 200. The greater frictional force can prevent the friction member 300 from moving back and forth within the sleeve 200, thereby preventing the first support member 21 from rotating relative to the second support member 22, and thus preventing the roller 30 from oscillating.

[0044] In one embodiment, the first support member 21 includes a first support rod, and the second support member 22 includes a second support rod. The first support rod has a first end 23 and a second end 24 opposite to each other, and the second support rod has a third end 25 and a fourth end 26 opposite to each other. The first end 23 and the fourth end 26 are respectively used to connect to the roller 30 and the machine body.

[0045] Furthermore, the second support rod is provided with a telescopic damping part, and the roller 30 is rotatably disposed on the telescopic damping part to provide shock absorption for the machine body.

[0046] Optionally, the adjustment module 400 can adjust the magnitude of the friction force applied by the friction element 300 to the inner wall of the sleeve 200 in various ways. For example, the friction force can be adjusted by adjusting the pressure of the friction element 300 on the inner wall of the sleeve 200, or by changing the material of the contact surface between the friction element 300 and the inner wall of the sleeve 200. These will not be elaborated here.

[0047] Please see Figures 6 to 8 In one embodiment, the movable module 100 includes a movable rod 110, which has a through mounting hole 111 and a mounting cavity 112. The through mounting hole 111 is formed on the side wall of the movable rod 110. The friction member 300 is provided with a moving part 310 and a friction part 320. The moving part 310 passes through the through mounting hole 111, and the friction part 320 is located outside the mounting cavity 112 and slides in cooperation with the inner wall of the sleeve 200. The adjustment module 400 is disposed in the mounting cavity 112 and can abut against the moving part 310 so that the moving part 310 can reciprocate along the axial direction of the through mounting hole 111.

[0048] The adjustment module 400 abuts against the moving part 310 and can drive the moving part 310 to reciprocate along the axial direction of the mounting through hole 111 to adjust the friction force of the friction part 320 located outside the mounting cavity 112 on the inner wall of the sleeve 200. When the roller 30 on the landing gear 20 vibrates, the adjustment module 400 drives the moving part 310 to move away from the mounting cavity 112. At this time, the pressure of the friction part 320 on the inner wall of the sleeve 200 increases, thereby increasing the friction force of the friction part 320 on the inner wall of the sleeve 200. The frictional damping generated by the wall can absorb the energy generated by the oscillation of the roller 30, thereby preventing the roller 30 from oscillating. When it is necessary to adjust the forward direction of the aircraft, the adjustment module 400 drives the moving part 310 to move towards the mounting cavity 112. At this time, the pressure of the friction part 320 on the inner wall of the sleeve 200 decreases, so that the first support member 21 can rotate relative to the second support member 22, thereby adjusting the forward direction of the roller 30. With this configuration, while achieving oscillation reduction, the overall weight and volume of the oscillation reduction device 10 are also small, ensuring the flight safety of the aircraft.

[0049] Further, please refer to Figures 3 to 5 The sleeve 200 and the movable rod 110 are coaxially arranged, and the axial directions of the sleeve 200 and the movable rod 110 are perpendicular to the axial directions of the first support member 21 and the second support member 22. Thus, when the first support member 21 reciprocates relative to the second support member 22, the movable rod 110 can reciprocate within the sleeve 200, and then generate damping under the action of the adjustment module 400 and the friction member 300.

[0050] In one embodiment, the inner wall of the sleeve 200 is coated with a friction material to ensure the reliability of friction between the inner wall of the sleeve 200 and the friction part 320.

[0051] In one embodiment, the mounting through holes 111 are provided with at least two holes spaced apart around the axis of the movable rod 110, and the friction elements 300 are provided with at least two holes corresponding to the mounting through holes 111. The adjustment module 400 can simultaneously drive at least two friction elements 300 to move and adjust the friction force on the inner wall of the sleeve 200 to ensure the sway reduction effect.

[0052] Please see Figure 6In one embodiment, the moving part 310 is provided with a first sliding surface 311, which is set at an angle to the axial direction of the movable rod 110. The adjustment module 400 includes a first abutting member 410 and a driving member 430. The first abutting member 410 is provided with a first abutting surface 411, which is set at an angle to the axial direction of the movable rod 110. The first abutting surface 411 and the first sliding surface 311 are slidably engaged. The driving member 430 is drivenly connected to the first abutting member 410, and the driving member 430 can drive the first abutting member 410 to reciprocate along the axial direction of the movable rod 110.

[0053] When the driving member 430 drives the first abutting member 410 to reciprocate along the axial direction of the movable rod 110, the first abutting surface 411 of the first abutting member 410 will slide with the first sliding surface 311 of the moving part 310. Since the first sliding surface 311 and the first abutting surface 411 are both set at an angle with the axial direction of the movable rod 110, the moving part 310 will reciprocate along the axial direction of the mounting through hole 111, thereby driving the friction part 320 to move, so as to realize the adjustment of the friction force of the friction part 320 on the inner wall of the sleeve 200. The implementation cost is low and the process is reliable.

[0054] Please see Figure 6 In one embodiment, the adjustment module 400 further includes a screw 440, the first abutment member 410 has a screw hole, one end of the screw 440 is driven to be connected to the drive member 430, and the other end of the screw 440 is screwed to the screw hole.

[0055] The end of the screw 440 away from the drive member 430 is screwed into the screw hole on the first abutment member 410. The drive member 430 can drive the screw 440 to rotate, thereby driving the first abutment member 410 to move within the first mounting cavity 112. This configuration has low implementation cost and reliable driving process.

[0056] Please see Figure 6 In one embodiment, the moving part 310 is further provided with a second sliding surface 312, which is set at an angle to the first sliding surface 311 and at an angle to the axial direction of the movable rod 110. The adjustment module 400 also includes a second abutting member 420 and an elastic member 450. The second abutting member 420 is provided with a second abutting surface 421, which is set at an angle to the axial direction of the movable rod 110. The second abutting surface 421 and the second sliding surface 312 are slidably engaged. One end of the elastic member 450 is provided on the second abutting member 420, and the other end of the elastic member 450 is provided on the end of the movable rod 110.

[0057] Under the elastic force of the elastic member 450, the second abutting member 420 tends to move toward the moving part 310. The second abutting surface 421 of the second abutting member 420 slides with the second sliding surface 312 of the moving part 310, causing the moving part 310 to drive the friction part 320 to move away from the mounting cavity 112, thereby applying a constant frictional force to the inner wall of the sleeve 200, thus preventing the first support member 21 from rotating arbitrarily relative to the second support member 22 without affecting the rotation of the roller 30.

[0058] Please see Figure 8 In one embodiment, the mounting through hole 111 is elongated and extends along the axial direction of the movable rod 110. The cross-sectional shape of the moving part 310 matches the cross-sectional shape of the mounting through hole 111. The first abutting surface 411 and the second abutting surface 421 are respectively provided on both sides of the moving part 310 away from the friction part 320. The elastic member 450 is provided in the mounting cavity 112 and located on one side of the moving part 310. The screw 440 and the driving member 430 are provided in the mounting cavity 112 and located on the other side of the moving part 310. The screw 440 drives the first abutting member 410 to move. The elastic member 450 can ensure that the second abutting member 420 abuts against the moving part 310 at all times, thereby ensuring the anti-sway effect of the anti-sway device 10.

[0059] Please see Figure 8 In one embodiment, the friction part 320 is provided with a friction surface, the shape of which matches the shape of the inner wall of the sleeve 200, so as to ensure the friction effect of the friction surface on the inner wall of the sleeve 200.

[0060] In the above embodiments, when the friction surface of the friction part 320 is worn down due to long-term friction, the friction part 300 can be completely removed and replaced through the mounting through hole 111. The replacement process is simple and has low implementation cost.

[0061] Please see Figures 9 to 10 In one embodiment, the first abutting member 410 is provided with a first through groove 412, the bottom wall of the first through groove 412 is a first abutting surface 411, the first through groove 412 is used to assemble with the moving part 310. When the first abutting member 410 reciprocates in the mounting cavity 112 along the axial direction of the movable rod 110, the first sliding surface 311 of the moving part 310 and the first abutting surface 411 of the bottom wall of the first through groove 412 can slide together, thereby driving the friction part 320 to move, thereby realizing the adjustment of the friction force of the friction part 320 on the inner wall of the sleeve 200. The implementation cost is low and the process is reliable.

[0062] Similar to the above embodiments, the second abutting member 420 is provided with a second through groove 422, the bottom wall of the second through groove 422 is the second abutting surface 421, and the second through groove 422 is used to assemble with the moving part 310, which will not be described in detail here.

[0063] Please see Figure 6 In one embodiment, the adjustment module 400 further includes a limiting member 460 connected to the second abutment member 420, and the elastic member 450 includes a spring sleeved on the outside of the limiting member 460.

[0064] The spring is sleeved outside the limiting member 460, which restricts the movement of the spring within the first mounting cavity 112, ensuring the accuracy and reliability of the direction of the elastic force applied by the spring to the second abutment member 420.

[0065] Please see Figures 2 to 5 In one embodiment, the active module 100 further includes a first connecting rod 120, a first ear seat 27 is provided on the side wall of the first support member 21, one end of the first connecting rod 120 is rotatably disposed on the first ear seat 27, and the other end of the first connecting rod 120 is rotatably disposed on one end of the active rod 110.

[0066] When the first support member 21 rotates relative to the second support member 22, the first connecting rod 120 rotates together with the first support member 21 and pushes and pulls the movable rod 110, so that the movable rod 110 can reciprocate within the sleeve 200, which has low implementation cost and stable structure.

[0067] Furthermore, the first link 120 is curved, thereby ensuring that the shape of the first link 120 matches the sidewall shape of the first support 21 when the first support 21 rotates.

[0068] In one embodiment, one end of the first connecting rod 120 is rotatably connected to the first ear seat 27 via a first pin, and the other end of the first connecting rod 120 is rotatably connected to one end of the movable rod 110 via a second pin.

[0069] Please see Figures 2 to 5 In one embodiment, the active module 100 further includes a second connecting rod 130, a second ear seat 28 is provided on the side wall of the second support member 22, the sleeve 200 is rotatably disposed on the second ear seat 28, one end of the second connecting rod 130 is rotatably disposed on the end of the first connecting rod 120 away from the first ear seat 27, and the other end of the second connecting rod 130 is rotatably disposed on the second ear seat 28.

[0070] This design improves the stability of the movable rod 110 when it reciprocates within the sleeve 200, thus enhancing the overall structural reliability.

[0071] Furthermore, when the first link 120 rotates together with the first support member 21 and pushes and pulls the movable rod 110, the second link 130 will also rotate relative to the second lug 28. The two ends of the second link 130 are rotatably connected to the first link 120 and the second support member 22, respectively, thereby improving the reliability of the overall structure when the first support member 21 and the second support member 22 rotate relative to each other.

[0072] Please see Figures 2 to 5 In one embodiment, the end of the second link 130 away from the second ear seat 28 is rotatably connected to the first link 120 via a second pin, and the other end of the second link 130 is rotatably connected to the second ear seat 28 via a third pin.

[0073] Please see Figure 2 In one embodiment, the side wall of the second support member 22 is further provided with a third ear seat 29. The third ear seat 29 and the second ear seat 28 are spaced apart along the axial direction of the second support member 22. The side wall of the sleeve 200 has a first mounting protrusion and a second mounting protrusion arranged opposite to each other. The first mounting protrusion is rotatably connected to the second ear seat 28, and the second mounting protrusion is rotatably connected to the third ear seat 29.

[0074] Another embodiment of this application provides a landing gear 20, which includes the anti-sway device 10 as described above.

[0075] In one embodiment, the landing gear 20 further includes a steering mechanism 40, which is disposed on the second support member 22 and drivenly connected to the first support member 21 to drive the first support member 21 to rotate relative to the second support member 22.

[0076] Furthermore, the steering mechanism 40 includes a drive motor 41, a transmission wheel 42, and a semi-annular rack 43. The drive motor 41 is mounted on the second support member 22. The transmission wheel 42 is driven and connected to the drive motor 41. The semi-annular rack 43 is arranged around the circumference of the first support member 21. The outer wall of the transmission wheel 42 is provided with meshing teeth that mesh with the semi-annular rack 43. When the drive motor 41 drives the transmission wheel 42 to rotate, it can drive the first support member 21 to rotate relative to the second support member 22, thereby realizing the steering of the roller 30.

[0077] In some embodiments, the landing gear 20 can also be prevented from shimming by the meshing between the meshing teeth on the drive wheel 42 and the semi-annular rack 43. However, as the drive wheel 42 is used for a longer period of time, the wear between the meshing teeth and the semi-annular rack 43 will cause the gap between them to increase, which will cause shimming. The shimming reduction device 10 is used to prevent the shimming phenomenon from occurring.

[0078] Another embodiment of this application provides an aircraft, which includes a fuselage, rollers 30 and landing gear 20 as described above, with one end of the landing gear 20 connected to the fuselage and the other end of the landing gear 20 connected to the rollers 30.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A sway reduction device, the sway reduction device being disposed on a landing gear, the landing gear including a first support member and a second support member, one end of the first support member being rotatably connected to one end of the second support member; characterized in that, The sway reduction device includes: An active module, which is rotatably mounted on the first support member; A sleeve is rotatably disposed on the second support member, the sleeve is sleeved outside the movable module, and the movable module is capable of reciprocating along the axial direction of the sleeve; A friction element, wherein the friction element is disposed on the outer wall of the movable module and slides in engagement with the inner wall of the sleeve; and An adjustment module is provided in the movable module, and the adjustment module is used to adjust the magnitude of the friction force exerted by the friction element on the inner wall of the sleeve.

2. The sway reduction device according to claim 1, characterized in that, The movable module includes a movable rod having a through hole and a cavity. The through hole is located on the side wall of the movable rod. The friction element has a moving part and a friction part. The moving part passes through the through hole, and the friction part is located outside the cavity and slides against the inner wall of the sleeve. The adjustment module is located inside the cavity and abuts against the moving part, so that the moving part can reciprocate along the axial direction of the through hole.

3. The sway reduction device according to claim 2, characterized in that, The moving part is provided with a first sliding surface, which is set at an angle to the axial direction of the movable rod. The adjustment module includes a first abutting member and a driving member. The first abutting member is provided with a first abutting surface, which is set at an angle to the axial direction of the movable rod. The first abutting surface slides with the first sliding surface. The driving member is drivenly connected to the first abutting member, and the driving member can drive the first abutting member to reciprocate along the axial direction of the movable rod.

4. The sway reduction device according to claim 3, characterized in that, The adjustment module also includes a screw, the first abutment has a screw hole, one end of the screw is driven to be connected to the driving component, and the other end of the screw is screwed to the screw hole.

5. The sway reduction device according to claim 3, characterized in that, The moving part is further provided with a second sliding surface, which is set at an angle to the first sliding surface and at an angle to the axial direction of the movable rod. The adjustment module further includes a second abutting member and an elastic member. The second abutting member is provided with a second abutting surface, which is set at an angle to the axial direction of the movable rod. The second abutting surface slides in cooperation with the second sliding surface. One end of the elastic member is located on the second abutting member, and the other end of the elastic member is located at the end of the movable rod.

6. The sway reduction device according to claim 5, characterized in that, The adjustment module further includes a limiting member, which is connected to the second abutting member, and the elastic member includes a spring, which is sleeved on the outside of the limiting member.

7. The sway reduction device according to claim 2, characterized in that, The movable module further includes a first connecting rod, and the side wall of the first support member is provided with a first ear seat. One end of the first connecting rod is rotatably disposed on the first ear seat, and the other end of the first connecting rod is rotatably disposed on one end of the movable rod.

8. The sway reduction device according to claim 7, characterized in that, The active module also includes a second connecting rod, and the side wall of the second support member is provided with a second ear seat. The sleeve is rotatably disposed on the second ear seat. One end of the second connecting rod is rotatably disposed on the end of the first connecting rod away from the first ear seat, and the other end of the second connecting rod is rotatably disposed on the second ear seat.

9. A landing gear, characterized in that, The landing gear includes the anti-sway device as described in any one of claims 1-8.

10. An aircraft, characterized in that, The aircraft includes a fuselage, rollers, and landing gear as described in claim 9, with one end of the landing gear connected to the fuselage and the other end of the landing gear connected to the rollers.

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