Swing reducing device, undercarriage and aircraft

Abstract

The invention 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] The present application relates to the technical field of aircraft, and in particular to a sway reduction device, a landing gear and an aircraft. Background Art

[0002] When an aircraft is taxiing, it usually adjusts the direction of the taxiing by adjusting the direction of the front wheels. When the taxiing speed of the aircraft exceeds the critical speed, the front wheels will vibrate violently, resulting in safety accidents such as tire tearing and landing gear breaking. In order to prevent safety accidents, aircraft are usually equipped with shimmy dampers, which can eliminate the shimmy of the aircraft during taxiing. In traditional technology, hydraulic shimmy dampers are usually used to eliminate the shimmy phenomenon of the aircraft during taxiing. However, for small and light aircraft such as drones, the weight and volume of hydraulic shimmy dampers are large, which will affect the flight safety of small and light aircraft. Summary of the invention

[0003] Based on this, it is necessary to provide a sway reduction device, landing gear and aircraft to address the problem that traditional hydraulic sway reduction devices are heavy and bulky, affecting the flight safety of small and light aircraft.

[0004] The technical solution is as follows:

[0005] One embodiment provides a sway reduction device, which is used to be arranged on a landing gear, wherein the landing gear includes a first support member and a second support member, and one end of the first support member is rotatably connected to one end of the second support member; the sway reduction device includes:

[0006] A movable module, wherein the movable module is rotatably disposed on the first supporting member;

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

[0008] a friction member, the friction member being disposed on the outer wall of the movable module and slidingly matched with the inner wall of the sleeve; and

[0009] An adjusting module, wherein the adjusting module is arranged on the movable module, and the adjusting module is used to adjust the magnitude of the friction force of the friction member acting on the inner wall of the sleeve.

[0010] In the above-mentioned sway reduction device, when the roller on the landing gear oscillates, the first support member and the second support member will rotate relative to each other, and the movable module will reciprocate along the axial direction of the sleeve. At this time, the adjustment module adjusts the friction force of the friction member acting on the inner wall of the sleeve to increase, so that the friction damping generated by the friction member and the inner wall of the sleeve can absorb the energy generated by the sway of the roller, thereby preventing the roller from oscillating; when it is necessary to adjust the forward direction of the aircraft, the adjustment module adjusts the friction force of the friction member acting on the inner wall of the sleeve to decrease, so as to facilitate the rotation of the first support member relative to the second support member, thereby adjusting the forward direction of the roller; compared with traditional technology, the above-mentioned sway reduction device can prevent the roller from oscillating through the friction damping generated by the friction member and the inner wall of the sleeve, and the overall weight and volume of the structure are small, thereby ensuring the flight safety of small and light aircraft.

[0011] In one embodiment, the movable module includes a movable rod, the movable rod has a connected mounting through hole and a mounting cavity, the mounting through hole is opened on the side wall of the movable rod, the friction member is provided with a moving part and a friction part, the moving part is passed through the mounting through hole, the friction part is located outside the mounting cavity and slidably cooperates with the inner wall of the sleeve, the adjustment module is arranged in the mounting cavity and can abut against the moving part so that the moving part can move back and forth along the axial direction of the mounting through hole.

[0012] In one embodiment, the movable portion is provided with a first sliding surface, and the first sliding surface is set at an angle with the axial direction of the movable rod. The adjustment module includes a first abutment member and a driving member. The first abutment member is provided with a first abutment surface, and the first abutment surface is set at an angle with the axial direction of the movable rod. The first abutment surface is slidably matched with the first sliding surface. The driving member is drivingly connected to the first abutment member, and the driving member can drive the first abutment member to reciprocate along the axial direction of the movable rod.

[0013] In one embodiment, the adjustment module further includes a screw rod, the first abutment member is provided with a screw hole, one end of the screw rod is drivingly connected to the driving member, and the other end of the screw rod is threadedly connected to the screw hole.

[0014] In one embodiment, the movable part is also provided with a second sliding surface, the second sliding surface is set at an angle with the first sliding surface, and the second sliding surface is set at an angle with the axial direction of the movable rod. The adjustment module also includes a second abutment member and an elastic member, the second abutment member is provided with a second abutment surface, the second abutment surface is set at an angle with the axial direction of the movable rod, the second abutment surface is slidably matched with the second sliding surface, one end of the elastic member is provided on the second abutment member, and the other end of the elastic member is provided on the end of the movable rod.

[0015] In one embodiment, the adjustment module further includes a limiting member, the limiting member is connected to the second abutting member, the elastic member includes a spring, and the spring is 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 provided on the first ear seat, and the other end of the first connecting rod is rotatably provided on one end of the movable rod.

[0017] In one embodiment, the movable module also includes a second connecting rod, 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 an 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 the present application provides a landing gear, wherein the landing gear includes the shimmy reduction device as described above.

[0019] Yet another embodiment of the present application provides an aircraft, which includes a fuselage, rollers, and a landing gear as described above, wherein one end of the landing gear is connected to the fuselage, and the other end of the landing gear is connected to the rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] FIG1 is a schematic structural diagram of a sway reduction device provided on a landing gear in an embodiment of the present application.

[0022] FIG. 2 is a schematic structural diagram of another angle when the sway reduction device is arranged on the landing gear in one embodiment of the present application.

[0023] FIG. 3 is a schematic diagram of the landing gear when no shimmy occurs.

[0024] FIG. 4 is a schematic diagram of the roller when it deflects in one direction.

[0025] FIG. 5 is a schematic diagram showing the roller deflecting in another direction.

[0026] FIG. 6 is a schematic diagram of the internal structure of the sway reduction device.

[0027] FIG. 7 is a schematic structural diagram of a friction member disposed on a movable rod in an embodiment of the present application.

[0028] FIG. 8 is a schematic diagram of a structure in which a moving part is disposed in a mounting through hole in an embodiment of the present application.

[0029] FIG. 9 is a schematic diagram of the cooperation between the moving part and the adjustment module in one embodiment of the present application.

[0030] FIG. 10 is a schematic diagram of the cooperation between the moving part and the first abutting surface and the second abutting surface in one embodiment of the present application.

[0031] Notes on the attached drawings:

[0032] 10. Sway reduction 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 member; 310. Moving part; 311. First sliding surface; 312. Second sliding surface; 320. Friction member; 400. Adjustment module; 410. First abutting member; 411. First abutting surface; 412. First through groove; 420. Second abutting member; 421 , second abutment surface; 422, second through groove; 430, driving member; 440, screw; 450, elastic member; 460, limiting member; 20, landing gear; 21, first support member; 22, second support member; 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, driving motor; 42, transmission wheel; 43, semi-annular rack. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If present, 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 implementation method.

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

[0040] Please refer to Figures 1 to 6. An embodiment of the present application provides a sway reduction device 10, including a movable module 100, a sleeve 200, a friction member 300 and an adjustment module 400. The movable module 100 is rotatably disposed on the first support member 21; the sleeve 200 is rotatably disposed on the second support member 22, 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 member 300 is disposed on the outer wall of the movable module 100 and slidably cooperates 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 friction force of the friction member 300 acting on the inner wall of the sleeve 200.

[0041] In the above-mentioned sway reduction device 10, when the roller 30 on the landing gear 20 shims, the first support member 21 and the second support member 22 will rotate relative to each other, and the movable module 100 will reciprocate along the axial direction of the sleeve 200. At this time, the adjustment module 400 adjusts the friction force of the friction member 300 acting on the inner wall of the sleeve 200 to increase, so that the friction damping generated by the friction member 300 and the inner wall of the sleeve 200 can absorb the energy generated by the shimmying of the roller 30, thereby preventing the roller 30 from shimmying; when it is needed When the forward direction of the aircraft is to be adjusted, the adjustment module 400 adjusts the friction force of the friction member 300 on the inner wall of the sleeve 200 to be smaller, so as to facilitate the first support member 21 to rotate relative to the second support member 22, thereby adjusting the forward direction of the roller 30; compared with the traditional technology, the above-mentioned sway reduction device 10 can prevent the roller 30 from swaying through the friction damping generated by the friction member 300 and the inner wall of the sleeve 200, and the overall weight and volume of the structure are small, thereby ensuring the flight safety of small and light aircraft.

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

[0043] Furthermore, when the roller 30 on the landing gear 20 oscillates, the roller 30 will swing violently left and right (as shown in Figures 4 and 5), causing the first support member 21 to rotate alternately clockwise and counterclockwise relative to the second support member 22, so that the friction member 300 moves back and forth rapidly in the sleeve 200. At this time, the adjustment module 400 adjusts the friction member 300 to the sleeve 200 to increase the friction force applied. The larger friction force can prevent the friction member 300 from moving back and forth in the sleeve 200, thereby preventing the first support member 21 from rotating relative to the second support member 22, thereby 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 relative to each other, and the second support rod has a third end 25 and a fourth end 26 relative to each other, and the first end 23 and the fourth end 26 are respectively used to connect with the roller 30 and the fuselage.

[0045] Furthermore, the second support rod is provided with a telescopic damping portion, and the roller 30 is rotatably provided on the telescopic damping portion to provide a shock absorbing effect on the fuselage.

[0046] Optionally, there are multiple ways for the adjustment module 400 to adjust the magnitude of the friction force applied by the friction part 300 to the inner wall of the sleeve 200. For example, the friction force can be adjusted by adjusting the pressure of the friction part 300 on the inner wall of the sleeve 200, or by replacing the material of the contact surface between the friction part 300 and the inner wall of the sleeve 200, which will not be elaborated here.

[0047] Please refer to Figures 6 to 8. In one embodiment, the movable module 100 includes a movable rod 110, and the movable rod 110 has a connected mounting through hole 111 and a mounting cavity 112. The mounting through hole 111 is opened on the side wall of the movable rod 110. The friction member 300 is provided with a movable portion 310 and a friction portion 320. The movable portion 310 is passed through the mounting through hole 111, and the friction portion 320 is located outside the mounting cavity 112 and slidably cooperates with the inner wall of the sleeve 200. The adjustment module 400 is arranged in the mounting cavity 112 and can abut the movable portion 310 so that the movable portion 310 can reciprocate along the axial direction of the mounting through hole 111.

[0048] The adjusting module 400 is in contact with the moving part 310, and can drive the moving part 310 to reciprocate along the axial direction of the mounting through hole 111, so as 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 oscillates, the adjusting module 400 drives the moving part 310 to move in a direction 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 friction damping generated by the wall can absorb the energy generated by the swing of the roller 30, thereby preventing the roller 30 from swinging; when the forward direction of the aircraft needs to be adjusted, the adjustment module 400 drives the moving part 310 to move toward the installation cavity 112. At this time, the pressure of the friction part 320 on the inner wall of the sleeve 200 becomes smaller, 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 such a configuration, while achieving swing reduction, the overall weight and volume of the swing reduction device 10 are also small, ensuring the flight safety of the aircraft.

[0049] Further, referring to Figures 3 to 5, the sleeve 200 is coaxially arranged with the movable rod 110, 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. In this way, when the first support member 21 reciprocates relative to the second support member 22, the movable rod 110 can reciprocate in 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 friction reliability between the inner wall of the sleeve 200 and the friction part 320 .

[0051] In one embodiment, at least two mounting through holes 111 are provided and are spaced apart around the axis direction of the movable rod 110, at least two friction members 300 are provided and are arranged one-to-one corresponding to the mounting through holes 111, and the adjustment module 400 can simultaneously drive at least two friction members 300 to move and adjust the friction force exerted on the inner wall of the sleeve 200, thereby ensuring the swing reduction effect.

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

[0053] When the driving member 430 drives the first abutment member 410 to move back and forth along the axial direction of the movable rod 110, the first abutment surface 411 of the first abutment member 410 will slide against the first sliding surface 311 of the movable part 310. Since the first sliding surface 311 and the first abutment surface 411 are both arranged at an angle to the axial direction of the movable rod 110, the movable part 310 will move back and forth along the axial direction of the mounting through hole 111, thereby driving the friction part 320 to move, so as to achieve 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 refer to FIG. 6 . In one embodiment, the adjustment module 400 further includes a screw rod 440 . The first abutting member 410 is provided with a screw hole. One end of the screw rod 440 is drivingly connected to the driving member 430 , and the other end of the screw rod 440 is screwed to the screw hole.

[0055] One end of the screw rod 440 away from the driving member 430 is screwed to the screw hole on the first abutment member 410, and the driving member 430 can drive the screw rod 440 to rotate, thereby driving the first abutment member 410 to move in the first installation cavity 112; such a configuration has low implementation cost and reliable driving process.

[0056] Please refer to Figure 6. In one embodiment, the movable portion 310 is further provided with a second sliding surface 312, the second sliding surface 312 is set at an angle with the first sliding surface 311, and the second sliding surface 312 is set at an angle with the axial direction of the movable rod 110. The adjustment module 400 also includes a second abutment member 420 and an elastic member 450. The second abutment member 420 is provided with a second abutment surface 421, the second abutment surface 421 is set at an angle with the axial direction of the movable rod 110, and the second abutment surface 421 is slidably matched with the second sliding surface 312. One end of the elastic member 450 is provided on the second abutment 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 abutment member 420 tends to move toward the movable portion 310, and the second abutment surface 421 of the second abutment member 420 slides with the second sliding surface 312 of the movable portion 310, so that the movable portion 310 drives the friction portion 320 to move away from the mounting cavity 112, thereby applying a constant friction force to the inner wall of the sleeve 200, thereby preventing the first support member 21 from rotating relative to the second support member 22 at will without affecting the turning direction of the roller 30.

[0058] Please refer to Figure 8. In one embodiment, the mounting through hole 111 is in the shape of an elongated strip, and the elongated mounting through hole 111 extends along the axial direction of the movable rod 110. The cross-sectional shape of the movable portion 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 arranged on both sides of the side of the movable portion 310 away from the friction portion 320. The elastic member 450 is arranged in the mounting cavity 112 and is located on one side of the movable portion 310. The screw 440 and the driving member 430 are arranged in the mounting cavity 112 and are located on the other side of the movable portion 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 movable portion 310 at all times, thereby ensuring the sway reduction effect of the sway reduction device 10.

[0059] Please refer to FIG. 8 . In one embodiment, the friction portion 320 is provided with a friction surface. The shape of the friction surface matches the shape of the inner wall of the sleeve 200 to ensure the friction effect of the friction surface on the inner wall of the sleeve 200 .

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

[0061] Please refer to Figures 9 and 10. In one embodiment, the first abutment member 410 is provided with a first through groove 412, and the bottom wall of the first through groove 412 is a first abutment surface 411. The first through groove 412 is used to be assembled with the movable part 310. When the first abutment member 410 reciprocates along the axial direction of the movable rod 110 in the installation cavity 112, the first sliding surface 311 of the movable part 310 and the first abutment surface 411 of the bottom wall of the first through groove 412 can slide together, thereby driving the friction part 320 to move, and then 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 embodiment, the second abutting member 420 defines a second through slot 422 , the bottom wall of the second through slot 422 is a second abutting surface 421 , and the second through slot 422 is used for assembly with the moving portion 310 , which will not be described in detail herein.

[0063] Please refer to FIG. 6 . In one embodiment, the adjustment module 400 further includes a limiting member 460 . The limiting member 460 is connected to the second abutting member 420 . The elastic member 450 includes a spring. The spring is sleeved on the outside of the limiting member 460 .

[0064] The spring is sleeved on the outside of the limiting member 460 , and the limiting member 460 can limit the movement of the spring in the first installation cavity 112 , thereby ensuring the direction accuracy and reliability of the elastic force applied by the spring to the second abutting member 420 .

[0065] Please refer to Figures 2 to 5. In one embodiment, the movable module 100 also includes a first connecting rod 120. The side wall of the first support member 21 is provided with a first ear seat 27. One end of the first connecting rod 120 is rotatably provided on the first ear seat 27, and the other end of the first connecting rod 120 is rotatably provided on one end of the movable rod 110.

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

[0067] Furthermore, the shape of the first connecting rod 120 is curved, so as to ensure that the shape of the first connecting rod 120 can match the shape of the side wall of the first supporting member 21 when the first supporting member 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 shaft, 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 shaft.

[0069] Please refer to Figures 2 to 5. In one embodiment, the movable module 100 also includes a second connecting rod 130. The side wall of the second support member 22 is provided with a second ear seat 28. The sleeve 200 is rotatably disposed on the second ear seat 28. One end of the second connecting rod 130 is rotatably disposed on an 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] Such an arrangement can improve the stability of the movable rod 110 when it reciprocates in the sleeve 200, and improve the reliability of the overall structure.

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

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

[0073] Please refer to 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 the present application provides a landing gear 20 , and the landing gear 20 includes the shimmy reduction 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 drivingly 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 driving motor 41, a transmission wheel 42 and a semi-annular rack 43. The driving motor 41 is arranged on the second support member 22, the transmission wheel 42 is connected to the driving motor 41, and 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 meshing with the semi-annular rack 43. When the driving 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 shimmying by the meshing teeth on the transmission wheel 42 and the semi-annular rack 43. However, as the use time of the transmission wheel 42 increases, the wear between the meshing teeth and the semi-annular rack 43 will cause the gap between the two to become larger, which will cause shimmying. The shimmying phenomenon is prevented by the shimmying reduction device 10.

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

[0079] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A sway reduction device, the sway reduction device being used to be arranged on a landing gear, the landing gear comprising 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 comprises: A movable module, wherein the movable module is rotatably disposed on the first supporting member; A sleeve, the sleeve is rotatably disposed on the second support member, the sleeve is sleeved outside the movable module, and the movable module can reciprocate along the axial direction of the sleeve; a friction member, the friction member being disposed on the outer wall of the movable module and slidingly matched with the inner wall of the sleeve; and An adjusting module, wherein the adjusting module is arranged on the movable module, and the adjusting module is used to adjust the magnitude of the friction force of the friction member acting 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, which has a connected mounting through hole and a mounting cavity. The mounting through hole is opened on the side wall of the movable rod. The friction member is provided with a movable part and a friction part. The movable part is passed through the mounting through hole. The friction part is located outside the mounting cavity and slidably cooperates with the inner wall of the sleeve. The adjustment module is arranged in the mounting cavity and can abut against the movable part so that the movable part can reciprocate along the axial direction of the mounting through hole.

3. The sway reduction device according to claim 2, characterized in that: The movable part is provided with a first sliding surface, and the first sliding surface is set at an angle with the axial direction of the movable rod. The adjustment module includes a first abutment member and a driving member. The first abutment member is provided with a first abutment surface, and the first abutment surface is set at an angle with the axial direction of the movable rod. The first abutment surface is slidably matched with the first sliding surface. The driving member is drivingly connected to the first abutment member, and the driving member can drive the first abutment 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 further comprises a screw rod, the first abutting member is provided with a screw hole, one end of the screw rod is drivingly connected to the driving member, and the other end of the screw rod is screwed to the screw hole.

5. The sway reduction device according to claim 3, characterized in that: The movable part is also provided with a second sliding surface, the second sliding surface is set at an angle with the first sliding surface, and the second sliding surface is set at an angle with the axial direction of the movable rod. The adjustment module also includes a second abutment and an elastic member, the second abutment is provided with a second abutment surface, the second abutment surface is set at an angle with the axial direction of the movable rod, the second abutment surface is slidably matched with the second sliding surface, one end of the elastic member is provided on the second abutment, and the other end of the elastic member is provided on the end of the movable rod.

6. The sway reduction device according to claim 5, characterized in that: The regulating module further includes a limiting member, the limiting member is connected to the second abutting member, the elastic member includes a spring, and the spring 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 comprises a first connecting rod, a first ear seat is arranged on the side wall of the first supporting member, one end of the first connecting rod is rotatably arranged on the first ear seat, and the other end of the first connecting rod is rotatably arranged on one end of the movable rod.

8. The sway reduction device according to claim 7, characterized in that: The movable module also 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 an 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 comprises a shimmy reduction device as claimed in any one of claims 1 to 8.

10. An aircraft, characterized in that: The aircraft comprises a fuselage, rollers and the landing gear as claimed in claim 9, one end of the landing gear is connected to the fuselage, and the other end of the landing gear is connected to the rollers.

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