A traction rod and a method for adjusting the buffer force of the traction rod

Abstract

The present application discloses a traction rod and a method for adjusting the buffering force of the traction rod, wherein the traction rod comprises a traction rod body and adjustment fixings arranged on the rod body at both ends of the traction rod body; a deformable closed area is arranged in the middle of the traction rod body; the two adjustment fixings can move toward or away from each other along the length direction of the traction rod body to adjust the size of the deformable closed area. The present application solves the problem that the traditional traction rod in the prior art cannot quickly complete the installation of the traction rod when performing traction buffering work on drones of different weights and sizes, and realizes that the size of the deformable closed area of ​​the traction rod body can be easily adjusted, and the matching work of the buffering force of the traction rod body can be quickly completed.

Description

Technical Field

[0001] The present application relates to the technical field of aircraft towing rods, and in particular to a towing rod and a method for adjusting the buffering force of the towing rod. Background Art

[0002] As modern battlefields rapidly develop towards the application of drone technology, the penetration rate of drones is increasing in military reconnaissance, cluster communication, target strike and other aspects. Drones of various models, multiple uses and adaptable to different terrains have emerged.

[0003] A large number of drones have great differences in size, weight, performance, etc., and different specifications and configurations of towing rods are required to deploy the aircraft before takeoff. Traditional towing rods are usually made of metal rods and buffer springs. However, during towing, the towing buffer force is relatively fixed, and it is impossible to adjust the matching traction and buffer force according to drones of different weights and sizes. The front landing gear of the aircraft usually needs springs to generate deformation to offset the impact of inertia when towing starts and ends, but the traditional towing rod spring model adaptation and replacement are difficult. In the face of the comprehensive needs of multiple models of drones on the actual battlefield, it is necessary to equip towing rods of different sizes, lengths, and traction forces. Time is often life on the battlefield. Drones need to be able to respond quickly to combat commands and complete deployment in the shortest time. Therefore, when traditional towing rods are facing towing buffer work for drones of different weights and sizes, they cannot quickly complete the matching of the towing rod's buffer force. Summary of the invention

[0004] The embodiment of the present application provides a traction rod and a method for adjusting the buffering force of the traction rod, thereby solving the problem that the traditional traction rod in the prior art cannot quickly complete the installation of the traction rod when performing traction buffering work on drones of different weights and sizes. It can easily adjust the size of the deformable closed area of ​​the traction rod body and quickly complete the matching of the buffering force of the traction rod body.

[0005] In the first aspect, an embodiment of the present invention provides a traction rod, comprising a traction rod body and adjustment fixing members arranged on the rod body at both ends of the traction rod body; a deformable closed area is arranged in the middle part of the traction rod body; the two adjustment fixing members can move toward or away from each other along the length direction of the traction rod body to adjust the size of the deformable closed area.

[0006] In combination with the first aspect, in a possible implementation, the traction rod body includes two curved elastic rods; the two ends of the two curved elastic rods are respectively fixedly connected, and the two adjustment fixing members are respectively connected to the rod bodies of the two curved elastic rods away from their two ends, so that the two curved sections of the two curved elastic rods form the deformable closed area.

[0007] In combination with the first aspect, in a possible implementation, the adjustment fixing member includes a telescopic part and an adjustment slider; the body of the telescopic part is fixedly connected to the end rod body of the traction rod body; the adjustment slider is slidably connected to the outer side of the traction rod body, and is fixedly connected to the output end of the telescopic part, and can move closer to or away from the deformable closed area along the length direction of the traction rod body under the drive of the telescopic part.

[0008] In combination with the first aspect, in a possible implementation, the adjustment fixing member includes a rotating part, a screw rod, a linear guide rail, a transmission slider and an adjusting slider; the body of the rotating part is fixedly connected to the end rod body of the traction rod body; the linear guide rail is fixedly connected to the traction rod body; one end of the screw rod is fixedly connected to the output end of the rotating part, and the other end of the screw rod is rotatably connected to the traction rod body; the transmission slider is sleeved on the outside of the screw rod and threadedly connected to the screw rod, and the transmission slider is slidably connected to the linear guide rail; the adjusting slider is slidably connected to the outside of the traction rod body, and is fixedly connected to the transmission slider, and can move towards or away from the deformable closed area along the length direction of the traction rod body under the drive of the rotating part.

[0009] In combination with the first aspect, in a possible implementation, it also includes a first traction connection, a second traction connection and a universal joint adapter; the first traction connection is fixedly connected to one end of the traction rod body; the universal joint adapter and the second traction connection are connected to the other end of the traction rod body, so that the second traction connection can rotate relative to the traction rod body.

[0010] In combination with the first aspect, in a possible implementation, it also includes an algorithm module and a control module, wherein the algorithm module is used to determine the size of the deformable closed area based on the weight of the towed object; the control module is used to control the adjustment fixing member to move to a corresponding position based on the size of the deformable closed area.

[0011] In combination with the first aspect, in a possible implementation manner, the algorithm module is used to determine the size of the deformable closed area based on the weight of the towed object, using the following formula:

[0012] ;

[0013] Wherein, F is the estimated traction force, G is the weight of the aircraft to be towed, and k is a coefficient, the value of which can be determined by the user based on experimental simulation or according to relevant standards;

[0014] ;

[0015] Among them, F is the estimated traction force, E is the elastic modulus of the traction rod body, I is the section inertia moment, and l is the length of the adjustable area;

[0016] The size of the deformable closed area is finally determined according to the calculated adjustable area length.

[0017] In combination with the first aspect, in a possible implementation, it also includes a stress monitoring module, which is attached to the middle area of ​​the traction rod body in the deformable closed area, and its stress monitoring data is transmitted to the algorithm module. When it is determined that its stress reaches a preset threshold, the k value is adjusted.

[0018] In combination with the first aspect, in a possible implementation, it also includes an acceleration detection module, whose acceleration detection data is transmitted to the algorithm module. When it is determined that its acceleration reaches a preset threshold, the stress monitoring module transmits the excess strain to the control module. The control module controls the adjustment fixing part to perform adaptive movement and records the data for correcting the movement amount before the next use.

[0019] In a second aspect, an embodiment of the present invention provides a method for adjusting a traction rod buffer force, comprising:

[0020] Calculate the estimated traction force,

[0021] ;

[0022] Wherein, F is the estimated traction force, G is the weight of the aircraft to be towed, and k is a coefficient, the value of which can be determined by the user based on experimental simulation or according to relevant standards;

[0023] Calculate the adjustable area length,

[0024] ;

[0025] Among them, F is the estimated traction force, E is the elastic modulus of the traction rod body, I is the section inertia moment, and l is the length of the adjustable area;

[0026] Calculate the distance between the two adjustment fixings after the drawbar buffer force is adjusted.

[0027] ;

[0028] Wherein, l0 is the initial position distance between the two adjusting fixings, l is the length of the adjustable area, and l1 is the distance between the two adjusting fixings after the traction rod buffer force is adjusted;

[0029] According to the calculated l1, the two adjusting fixing parts are controlled to move to the corresponding positions.

[0030] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0031] The embodiment of the present invention adopts a traction rod body and adjustment fixing members arranged on the rod bodies at both ends of the traction rod body; a deformable closed area is arranged in the middle of the traction rod body; the two adjustment fixing members can move toward or away from each other along the length direction of the traction rod body to adjust the size of the deformable closed area, so that the size of the buffer force of the traction rod body can be adjusted according to the size of the actual traction force;

[0032] The invention effectively solves the problem that the traditional traction rod in the prior art cannot quickly complete the installation of the traction rod when performing traction buffering work on drones of different weights and sizes, and realizes that the size of the deformable closed area of ​​the traction rod body can be easily adjusted, and the buffering force matching of the traction rod body can be quickly completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 An axonometric view of a traction rod provided in an embodiment of the present application;

[0035] Figure 2 for Figure 1 A partial enlarged view of the middle A area;

[0036] Figure 3 An axonometric view of the traction rod provided in an embodiment of the present application in another direction;

[0037] Figure 4 for Figure 3 A partial enlarged view of the middle B area;

[0038] Figure 5 Taking the start of a towing aircraft as an example provided in the embodiment of the present application, the horizontal axis Z is the movement of the adjustment slider, and the vertical axis is the simulation data diagram of the deformation of the towing rod in the Y direction;

[0039] Figure 6 In the embodiment of the present application, the simulation data diagram is provided by taking the start of a towing aircraft as an example, in which the horizontal axis X is the traction force and the vertical axis is the deformation amount of the towing rod in the Y direction.

[0040] Icons: 1-traction rod body; 11-bending elastic rod; 2-adjusting fixing piece; 21-rotating part; 22-screw rod; 23-linear guide rail; 24-transmission slider; 25-adjusting slider; 3-deformable closed area; 4-first traction connecting piece; 5-second traction connecting piece; 6-universal joint adapter; 61-fixing piece; 62-rotating piece. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the embodiments of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0043] Reference Figure 1-Figure 2The embodiment of the present invention provides a traction rod, including a traction rod body 1 and adjustment fixings 2 arranged on the rod body at both ends of the traction rod body 1; a deformable closed area 3 is arranged in the middle of the traction rod body 1; the two adjustment fixings 2 can move toward or away from each other along the length direction of the traction rod body 1 to adjust the size of the deformable closed area 3. Specifically, in the embodiment of the present application, the structure of the adjustment fixing 2 can use a detachable clamp or bolt, and the position of the two adjustment fixings 2 on the traction rod body 1 can be moved according to the size of the deformable closed area 3 to be adjusted, so as to meet the size of the deformable closed area 3, and finally adjust the size of the buffering force of the traction rod. In this way, it is ensured that drones of different weights can have a buffering force that is suitable for them, which not only ensures that heavy drones can have sufficient traction during the traction process, but also avoids large shaking and displacement of small drones due to excessive buffering force, thereby ensuring the stability and safety of the aircraft.

[0044] Reference Figure 1-Figure 2 The traction rod body 1 includes two curved elastic rods 11; the two ends of the two curved elastic rods 11 are fixedly connected respectively, and the two adjustment fixings 2 are respectively connected to the rod bodies of the two curved elastic rods 11 away from the two ends thereof, so that the two curved sections of the two curved elastic rods 11 form a deformable closed area 3. Specifically, in the embodiment of the present application, the traction rod body 1 uses a carbon fiber rod, and the two traction rod bodies 1 are symmetrically arranged along the central axis of the traction rod. The preformed carbon fiber rods with curved section shapes are used to be spliced, and are first fixed by two adjustment fixings 2. The position between the two adjustment fixings 2 can be adjusted according to the aircraft of different weights to change the size of the deformable closed area 3 of the carbon fiber rod, thereby realizing the change of the buffering force of the traction rod. In the embodiment of the present application, lightweight can be achieved. Through the carbon fiber rod formed in a special shape, the carbon fiber material is introduced into the application of the traction rod, and the weight reduction effect of more than 60% is achieved compared with the traditional steel plus spring solution. The operation and carrying by two or even multiple people is improved to the operation of one person, which greatly improves the ease of use and efficiency of use. Compared with traditional metal traction rods, the present application has greatly simplified the structure and uses pre-bent carbon fiber rods instead of thick springs, which greatly reduces the failure rate during later use and also reduces maintenance costs; in addition, the carbon fiber rods in the embodiments of the present application can also be replaced by rods made of similar materials, such as glass fiber and aramid fiber.

[0045] Reference Figure 1-Figure 2The adjusting fixture 2 includes a telescopic part and an adjusting slider 25; the body of the telescopic part is fixedly connected to the end rod body of the traction rod body 1; the adjusting slider 25 is slidably connected to the outside of the traction rod body 1 and is fixedly connected to the output end of the telescopic part, and can move toward or away from the deformable closed area 3 along the length direction of the traction rod body 1 under the drive of the telescopic part. Specifically in the embodiment of the present application, one of the structures of the adjusting fixture 2 is the telescopic part and the adjusting slider 25. The telescopic part can be a servo cylinder or a push rod motor. The adjusting slider 25 is sleeved on the outside of the two traction rod bodies 1 after they are joined together, and can clamp the two traction rod bodies 1. When it is necessary to adjust the size of the deformable closed area 3, the telescopic part is controlled to extend and retract, thereby driving the adjusting slider 25 to slide along the length direction of the traction rod body 1, thereby adjusting the size of the deformable closed area 3, and then adjusting the size of the traction rod buffer force.

[0046] Reference Figure 1-Figure 2 The adjusting fixed part 2 includes a rotating part 21, a screw rod 22, a linear guide rail 23, a transmission slider 24 and an adjusting slider 25; the body of the rotating part 21 is fixedly connected to the end rod body of the traction rod body 1; the linear guide rail 23 is fixedly connected to the traction rod body 1; one end of the screw rod 22 is fixedly connected to the output end of the rotating part 21, and the other end of the screw rod 22 is rotatably connected to the traction rod body 1; the transmission slider 24 is sleeved on the outside of the screw rod 22 and is threadedly connected to the screw rod 22, and the transmission slider 24 is slidably connected to the linear guide rail 23; the adjusting slider 25 is slidably connected to the outside of the traction rod body 1, and is fixedly connected to the transmission slider 24, and can move towards or away from the deformable closed area 3 along the length direction of the traction rod body 1 under the drive of the rotating part 21. Specifically in the embodiment of the present application, another structure of the adjusting fixing member 2 is a rotating part 21, a screw rod 22, a linear guide rail 23, a transmission slider 24 and an adjusting slider 25. The rotating part 21 can use a servo motor. When the size of the deformable closed area 3 needs to be adjusted, the rotating part 21 is controlled to rotate, thereby driving the screw rod 22 to rotate, thereby driving the transmission slider 24 to slide along the linear guide rail 23. Since the transmission slider 24 and the adjusting slider 25 are fixedly connected as a whole, they can synchronously drive the adjusting slider 25 to move along the length direction of the traction rod body 1, thereby realizing the adjustment of the size of the deformable closed area 3, and then realizing the adjustment of the buffering force of the traction rod.

[0047] Reference Figure 1-Figure 2, further comprising a first traction connection member 4, a second traction connection member 5 and a universal joint adapter 6; the first traction connection member 4 is fixedly connected to one end of the traction rod body 1; the universal joint adapter 6 and the second traction connection member 5 are connected to the other end of the traction rod body 1, so that the second traction connection member 5 can rotate relative to the traction rod body 1. Specifically, in the embodiment of the present application, the first traction connection member 4 comprises a traction ring and a traction ring fixing seat, both of which are fixedly mounted on the traction rod body 1, and the second traction connection member 5 comprises an aluminum alloy front fork, the aluminum alloy front fork and the universal joint adapter 6 are fixedly connected, and the center of the rotation axis of the universal joint adapter 6 coincides with the center axis of the traction rod, so that when towing an aircraft, forces in different directions are converted into axial forces of the traction rod, and no lateral bending moment is generated, so that the force on the traction rod during the traction process is stable and controllable; more specifically, the universal joint adapter 6 comprises a fixing member 61 and a rotating member 62, and the axis of the fixing member 61 coincides with the center axis of the traction rod. In addition, the structure of the aluminum alloy front fork is not limited to a U-shape, and a cylindrical or square tube shape can also be used instead.

[0048] Reference Figure 1-Figure 2 , and also includes an algorithm module and a control module. The algorithm module is used to determine the size of the deformable closed area 3 based on the weight of the towed object; the control module is used to control the adjustment of the fixing member 2 to move to the corresponding position based on the size of the deformable closed area 3. Specifically, in the embodiment of the present application, in order to achieve automatic matching and adjustment of the buffer force of the traction rod required for the towed object, an algorithm module and a control module are further set. Because there is no definite solution for automatically and accurately adjusting the buffer force of the traction rod in the prior art, the buffer force of the traction rod is more adjusted by empirical judgment combined with manual adjustment in the prior art. This method cannot meet the requirements of emergency situations, that is, it cannot complete the adjustment and matching of the buffer force of the traction rod in the shortest time.

[0049] In the embodiment of the present application, the algorithm module is used to determine the size of the deformable closed area 3 based on the weight of the towed object, using the following formula:

[0050] ;

[0051] Among them, F is the estimated traction force, G is the gravity of the aircraft to be towed, and k is a coefficient, the value of which can be determined by the user according to experimental simulation or according to relevant standards. For example, according to GJB 67A-2008 Military Aircraft Structural Strength Specification Volume 1 3.2.6 Ground Maintenance, it is mentioned that when the aircraft weight is less than 133000N (13.3 tons), the traction force is equal to 0.3 times the aircraft weight. This can meet the traction input basis of most drones, so k in the embodiment of the present application can be 0.3.

[0052] ;

[0053] Among them, F is the estimated traction force, E is the elastic modulus of the traction rod body, I is the section inertia moment, and l is the length of the adjustable area;

[0054] The size of the deformable enclosed area 3 is finally determined based on the calculated adjustable area length. Specifically, in the embodiment of the present application, the command execution of the algorithm module automatically calculates and obtains the corresponding value through the above formula; Calibration, because the traction rod is more likely to break when under pressure, it is necessary to find the relationship between the critical length of the adjustable area of ​​the traction rod under pressure and the estimated traction force F. For the equivalent model with both ends fixed, it can be obtained:

[0055] ;

[0056] Where: F is the estimated traction force, E is the elastic modulus of the material, I is the section moment of inertia, and l is the length of the adjustment area;

[0057] It can be obtained that, when the material is known, the length of the adjustable area l can be obtained according to the magnitude of the traction force:

[0058] ;

[0059] According to GJB 67A-2008 Military Aircraft Structural Strength Specifications, Volume 1, 3.2.6 Ground Maintenance, when the aircraft weight is less than 133,000 N (13.3 tons), the traction force is equal to 0.3 times the aircraft weight. This can meet the traction input basis of most UAVs. When the traction input is given, the initial position spacing of the adjustment fixings 2 (here refers to the adjustment slider) at both ends of the traction rod is l0, and the distance obtained by the traction force F is , then the final adjusted spacing between the adjusting fixings 2 (here, the adjusting slider 25) at both ends of the traction rod is The formula is:

[0060] ;

[0061] That is, the adjusting fixture 2 drives the adjusting slider 25 to automatically adjust to the corresponding position through the servo motor. To match the traction.

[0062] In the embodiment of the present application, a stress monitoring module is also included, which is attached to the middle area of ​​the traction rod body 1 in the deformable closed area 3. Its stress monitoring data is transmitted to the algorithm module. When it is judged that its stress reaches the preset threshold, the k value is adjusted. It also includes an acceleration detection module, whose acceleration detection data is transmitted to the algorithm module. When it is judged that its acceleration reaches the preset threshold, the stress monitoring module transmits the over-limit strain amount to the control module, and the control module controls the adjustment fixing 2 to move adaptively, and records the data at the same time for correction of the movement amount before the next use. Specifically, in the embodiment of the present application, a strain gauge is arranged at the bend of the traction rod to detect the actual local strain of the traction rod in real time. If the acceleration of the tractor exceeds the limit, the strain gauge transmits the over-limit strain amount to the servo motor, and then controls the adjustment slider 25 to move adaptively, and records the data at the same time for correction of the movement amount before the next use. In the embodiment of the present application, a stress monitoring module is further provided, and a preset stress threshold is provided. Due to the complexity and diversity of the environmental site, an important factor affecting the k value is the site roughness. When the site roughness changes, if the k value does not change accordingly, the adjustment requirement of the traction rod buffering force cannot be accurately achieved. Therefore, in the embodiment of the present application, by providing a stress monitoring module, the actual local strain of the traction rod can be detected in real time. When the stress reaches the preset threshold, the k value is automatically adjusted. The size of the k value requires actual testing and measurement of sites with different roughness in advance, and the k values ​​corresponding to sites with different roughness are recorded in advance to form a k value database, and the k value database is saved in the control module. When the stress reaches the preset threshold, the k value of the site with the current roughness is retrieved according to the data in the k value database, thereby realizing automatic adjustment of the k value.

[0063] An embodiment of the present invention provides a method for adjusting a traction rod buffer force, comprising:

[0064] Calculate the estimated traction force,

[0065] ;

[0066] Wherein, F is the estimated traction force, G is the weight of the aircraft to be towed, and k is a coefficient, the value of which can be determined by the user based on experimental simulation or according to relevant standards;

[0067] Calculate the adjustable area length,

[0068] ;

[0069] Among them, F is the estimated traction force, E is the elastic modulus of the traction rod body, I is the section inertia moment, and l is the length of the adjustable area;

[0070] Calculate the distance between the two adjustment fixings after the drawbar buffer force is adjusted.

[0071] ;

[0072] Wherein, l0 is the initial position distance between the two adjusting fixing members 2, l is the length of the adjustable area, and l1 is the distance between the two adjusting fixing members 2 after the traction rod buffer force is adjusted;

[0073] According to the calculated l1, the two adjusting fixing members 2 are controlled to move to corresponding positions.

[0074] In combination with the characteristics of carbon fiber materials, a symmetrically bent carbon fiber rod is used to simulate the stress and deformation characteristics of traditional springs. The fixed positions of the front and rear adjustment sliders 25 are symmetrically adjusted by a servo motor according to the size of the traction force to adjust the deformation of the carbon fiber rod, so as to provide different buffering forces when towing different aircraft. The end of the traction rod is connected to the aluminum alloy front fork using a universal joint adapter 6, and the center of the universal joint adapter 6 coincides with the center axis of the traction rod, so that the forces in different directions are converted into the axial force of the traction rod when towing the aircraft, and no lateral bending moment is generated, so that the force on the traction rod during the traction process is stable and controllable. When the adjustment slider 25 moves outward, the deformable closed area 3 of the carbon fiber rod becomes larger, and the buffering purpose is achieved by increasing the deformation. The transmission slider 24 moves to the outermost side to obtain the maximum deformation, that is, the maximum buffering amount.

[0075] Taking the start of a towing aircraft as an example, the relationship between the traction force and the moving distance of the slider is fitted according to the simulation data, such as Figure 3-Figure 4 As shown:

[0076] in, Figure 3 The horizontal axis Z is the movement of the adjustment slider 25, and the vertical axis is the deformation of the traction rod in the Y direction;

[0077] It can be concluded that y=-0.0403z-3.1333;

[0078] in, Figure 4 The horizontal axis X is the traction force, and the vertical axis is the deformation of the traction rod in the Y direction;

[0079] y=-0.016x+1.1176;

[0080] It can be obtained that the functional relationship between the traction force and the movement amount of the adjusting slider 25 is:

[0081] Z = 0.4x-105;

[0082] According to this functional relationship, the servo motors at both ends of the traction rod can be controlled to linearly adjust according to the input traction force, so that the slider 25 is adjusted to the corresponding position.

[0083] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0084] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A traction rod, characterized in that: It comprises a traction rod body (1) and adjustment fixing members (2) arranged on the rod bodies at both ends of the traction rod body (1); A deformable closed area (3) is provided in the middle of the traction rod body (1); The two adjusting fixing members (2) are capable of moving towards or away from each other along the length direction of the traction rod body (1) to adjust the size of the deformable closed area (3); The traction rod body (1) comprises two curved elastic rods (11); The two ends of the two curved elastic rods (11) are respectively fixedly connected, and the two adjustment fixing members (2) are respectively connected to the rod bodies of the two curved elastic rods (11) away from the two ends thereof, so that the two curved sections of the two curved elastic rods (11) form the deformable closed area (3); The adjusting fixing member (2) comprises a rotating part (21), a screw rod (22), a linear guide rail (23), a transmission slider (24) and an adjusting slider (25); The body of the rotating part (21) is fixedly connected to the end rod body of the traction rod body (1); The linear guide rail (23) is fixedly connected to the traction rod body (1); One end of the screw rod (22) is fixedly connected to the output end of the rotating part (21), and the other end of the screw rod (22) is rotationally connected to the traction rod body (1); The transmission slider (24) is sleeved on the outside of the screw rod (22) and is threadedly connected to the screw rod (22), and the transmission slider (24) is slidably connected to the linear guide rail (23); The adjusting slider (25) is slidably connected to the outside of the traction rod body (1) and fixedly connected to the transmission slider (24), and can move towards or away from the deformable closed area (3) along the length direction of the traction rod body (1) under the drive of the rotating part (21).

2. The traction rod according to claim 1, characterized in that: The adjusting fixing member (2) comprises a telescopic portion and an adjusting sliding block (25); The body of the telescopic part is fixedly connected to the end rod body of the traction rod body (1); The adjusting slider (25) is slidably connected to the outside of the traction rod body (1) and fixedly connected to the output end of the telescopic portion, and can move along the length direction of the traction rod body (1) towards or away from the deformable closed area (3) under the drive of the telescopic portion.

3. The traction rod according to claim 1, characterized in that: It also includes a first traction connection member (4), a second traction connection member (5) and a universal joint adapter seat (6); The first traction connecting member (4) is fixedly connected to one end of the traction rod body (1); The universal joint adapter (6) and the second traction connection member (5) are connected to the other end of the traction rod body (1), so that the second traction connection member (5) can rotate relative to the traction rod body (1).

4. The traction rod according to claim 1, characterized in that: It also includes an algorithm module and a control module, wherein the algorithm module is used to determine the size of the deformable closed area (3) based on the weight of the towed object; The control module is used to control the adjustment fixing member (2) to move to a corresponding position based on the size of the deformable closed area (3).

5. The traction rod according to claim 4, characterized in that: The algorithm module is used to determine the size of the deformable closed area based on the weight of the towed object, using the following formula: ； Wherein, F is the estimated traction force, G is the weight of the aircraft to be towed, and k is a coefficient, the value of which can be determined by the user based on experimental simulation or according to relevant standards; ； Wherein, F is the estimated traction force, E is the elastic modulus of the traction rod body (1), I is the section moment of inertia, and l is the length of the adjustable area; The size of the deformable closed area (3) is ultimately determined based on the calculated adjustable area length.

6. The traction rod according to claim 5, characterized in that It also includes a stress monitoring module, which is attached to the middle area of ​​the traction rod body (1) in the deformable closed area (3), and its stress monitoring data is transmitted to the algorithm module. When it is determined that its stress reaches a preset threshold, the k value is adjusted.

7. The traction rod according to claim 6, characterized in that It also includes an acceleration detection module, whose acceleration detection data is transmitted to the algorithm module. When it is determined that the acceleration reaches a preset threshold, the stress monitoring module transmits the excess strain to the control module. The control module controls the adjustment fixing member (2) to perform adaptive movement and records the data for use in correcting the movement amount before the next use.

8. A method for adjusting the buffer force of a traction rod, based on the traction rod according to any one of claims 1 to 7, characterized in that: include: Calculate the estimated traction force, ； Wherein, F is the estimated traction force, G is the weight of the aircraft to be towed, and k is a coefficient, the value of which can be determined by the user based on experimental simulation or according to relevant standards; Calculate the adjustable area length, ； Wherein, F is the estimated traction force, E is the elastic modulus of the traction rod body (1), I is the section moment of inertia, and l is the length of the adjustable area; Calculate the distance between the two adjustment fixings (2) after the drawbar buffer force is adjusted. ； Wherein, l0 is the initial position distance between the two adjusting fixing members, l is the length of the adjustable area, and l1 is the distance between the two adjusting fixing members (2) after the traction rod buffer force is adjusted; According to the calculated l1, the two adjusting fixing members (2) are controlled to move to corresponding positions.

Images