Dummy shank impact strength testing device under muscle active force

Abstract

The invention relates to the technical field of vehicle collision testing, and discloses a dummy shank impact strength testing device under muscle active force, the dummy shank impact strength testing device comprises a shank model, a frame, an axial loading assembly and a lateral loading assembly, the shank model comprises a foot model and a limb model which are integrally formed, and the end, away from the foot model, of the limb model is installed on the frame; the axial loading assembly is installed on the frame and abuts against the bottom end of the foot model so as to apply axial loading force to the shank model. The lateral loading assembly is mounted on the frame, and the lateral loading assembly abuts against the limb model so as to apply lateral loading force to the shank model; a tendon model is formed on the limb model, the tension assembly is connected with the tendon model, and the tension assembly can pull the tendon model in the axial direction of the limb model. According to the invention, by integrating the shank model, the test accuracy is ensured, and the impact strength of the shank in a collision accident can be evaluated more accurately.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle collision testing, in particular to a device for testing the impact strength of a dummy calf under active muscle force. Background Art

[0002] In the complex scenario of a car collision accident, the safety of the occupants has always been the focus of vehicle design and safety research. Especially in frontal collision accidents, the occupants' lower legs are often the key area vulnerable to injury. In such accidents, due to the deformation of the vehicle structure, components such as pedals, floors, and firewalls may seriously invade the passenger compartment space, causing direct physical impact on the occupants' lower legs.

[0003] In actual collision accidents, injuries to the occupants' calves are often not the result of a single force. The intrusion of the pedals or floorboards usually causes axial compression of the calves, which directly acts on the calf bones and muscle tissue, and may cause serious consequences such as fractures and soft tissue damage. At the same time, the intrusion of the firewall may produce bending loading in the front-to-back direction, further increasing the risk of calf injury, which not only causes damage to the occupants' bones, but may also cause strain or tearing of soft tissues such as calf muscles, tendons and ligaments.

[0004] Existing experimental devices and research methods often ignore the active muscle force of the human body when a collision occurs when simulating the impact of a collision accident. When facing an emergency such as a collision, the human body will instinctively produce defensive reactions such as muscle contraction. For example, muscle contraction may increase the stiffness of the calf, change its force distribution, and even reduce the damage caused by the collision to a certain extent.

[0005] Therefore, in order to more accurately assess the risk of lower leg injury in a collision accident and optimize vehicle safety design, it is necessary to consider the influence of the human body's active muscle force in the experimental setup and research methods to improve the scientific nature of collision safety research and provide a more reliable basis for vehicle manufacturers to design safer and more effective occupant protection systems. Summary of the invention

[0006] The purpose of the present invention is to provide a dummy calf impact strength testing device under muscle active force, so as to solve the problem that the existing test devices and research methods ignore the active muscle force when the collision occurs when simulating the impact of the collision accident on the calf.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A dummy calf impact strength test device under muscle active force comprises: a calf model, a frame, an axial loading component and a lateral loading component, wherein the calf model comprises an integrally formed foot model and a limb model, and the limb model is mounted on the frame at one end away from the foot model; the axial loading component is mounted on the frame, and the axial loading component abuts against the bottom end of the foot model to apply axial loading force to the calf model to simulate vehicle floor intrusion in a collision accident; the lateral loading component is mounted on the frame, and the lateral loading component abuts against the limb model to apply lateral loading force to the calf model to simulate vehicle firewall intrusion in a collision accident; and further comprises a tension component, a tendon model is formed on the limb model, the tension component is connected to the tendon model, and the tension component can pull the tendon model along the axial direction of the limb model to simulate the tension of the calf muscle in a collision accident.

[0009] According to the above technical means, the present invention sets an axial loading component and a lateral loading component so that the device can simulate the intrusion of the vehicle floor and firewall in a collision accident, so as to comprehensively evaluate the force conditions of the dummy's calf in different directions, thereby providing more comprehensive test results.

[0010] The present invention integrates a calf model, including a foot model and a limb model. The one-piece design of the foot model and the limb model enables the device to simulate the structure of the human calf more realistically, ensures the continuity and accuracy of the test, and helps to more accurately evaluate the impact strength of the calf in a collision accident. At the same time, a tendon model is integrated on the limb model to simulate the gastrocnemius muscle on the calf. The connection between the tension component and the tendon model, as well as the pulling function along the axial direction of the limb model, enable the device to simulate the tension of the calf muscles in a collision accident, which helps to study the influence of muscle tension on the impact strength of the calf and provide a scientific basis for vehicle safety design and improvement.

[0011] The present invention can simulate a variety of collision scenarios and muscle tension conditions, so its test results are more reliable and practical, allowing automobile manufacturers and related research institutions to more accurately evaluate vehicle safety performance and take more effective measures to improve the survival rate and injury level of passengers in collision accidents.

[0012] Furthermore, the tension assembly includes a traction rope and a first drive assembly, one end of the traction rope is connected to the tendon model, and the other end is connected to the first drive assembly, and the traction rope is arranged along the axial direction of the limb model. The first drive assembly is used to pull the traction rope to move along the axial direction of the limb model to apply tension to the tendon model to simulate the tension of the calf muscles in a collision accident.

[0013] According to the above technical means, the present invention accurately controls the pulling force and pulling speed of the pulling rope through the first driving component, which can highly simulate the active tension of the calf muscles in a collision accident, making the test process closer to the actual situation and improving the accuracy and reliability of the test results.

[0014] Furthermore, the tension assembly also includes a tension sensor, which is installed on the pulling rope and is used to collect the tension of the pulling rope.

[0015] According to the above technical means, the tension sensor is directly installed on the pulling rope, which can monitor the tension on the pulling rope in real time, ensuring that the specific value of the simulated calf muscle tension can be accurately obtained during the test. It is helpful to evaluate the stress condition and muscle tension performance of the calf model in a collision accident, and provide a more reliable basis for vehicle safety design and human injury protection.

[0016] Furthermore, the tension assembly also includes a fixed pulley, which is mounted on the frame; the other end of the pulling rope passes through the fixed pulley and is connected to the first driving assembly.

[0017] According to the above technical means, the fixed pulley is used to change the direction of the force. In the test device, the traction rope is connected to the first drive assembly through the fixed pulley, so that the first drive assembly can generate a driving force at a convenient position, and the traction rope can transmit this force along the required direction (i.e., the simulated tension direction of the calf muscle), making the structure of the test device more flexible and able to adapt to different test requirements.

[0018] Furthermore, the axial loading assembly includes a second driving assembly, a support frame and a guide assembly, the support frame is abutted against the foot model; the guide assembly is arranged on the frame, and the guide assembly is arranged along the axial direction of the calf model; the support frame is movably mounted on the guide assembly, and the second driving assembly is connected to the support frame, and the second driving assembly can drive the support frame to move along the axial direction of the calf model.

[0019] According to the above technical means, by setting the guide component along the axial direction of the calf model, it is ensured that the support frame and the loading force it carries can move accurately along the axial direction of the calf, which helps to simulate the axial pressure on the calf under real conditions.

[0020] Furthermore, the guide assembly includes a slide rail and a roller, the slide rail is arranged on the frame, and the slide rail is arranged along the axial direction of the calf model; the roller is installed on the slide rail, and the roller can move on the slide rail; the roller is connected to the support frame so that the support frame moves along the axial direction of the calf model.

[0021] According to the above technical means, the design of the movement of the roller on the slide rail can reduce the friction and resistance during the movement, making the loading process smoother and more controllable, and ensuring that the support frame and the axial loading assembly connected thereto can move smoothly along the axial direction of the calf model. Due to the guiding effect of the slide rail, the roller and the support frame can move accurately along the preset path, which helps to achieve precise loading position control in experiments or tests, thereby improving the accuracy and reliability of the test.

[0022] Furthermore, the lateral loading assembly includes a third driving assembly, an impact head and a moving assembly, the third driving assembly is mounted on the moving assembly, the moving assembly is arranged on the frame, and the moving assembly can move along the axial direction of the calf model, so that the third driving assembly can move along the axial direction of the calf model; the impact head is mounted on the third driving assembly, and the impact head is abutted against the limb model, and the third driving assembly can drive the impact head to impact the side of the limb model.

[0023] According to the above technical means, the third driving assembly is installed on the moving assembly and can move along the axial direction of the calf model, so that the impact head can be accurately positioned on the side of the limb model for impact testing. Accurate lateral loading helps to evaluate the response and performance of the calf model under lateral force, providing important data support for research and development. At the same time, due to the design of the moving assembly, the lateral loading assembly can be adjusted according to different test requirements and adapt to calf models of different sizes and shapes, thereby enabling the lateral loading assembly to be widely used in the mechanical properties testing of various calf models, thereby improving the versatility and practicality of the equipment.

[0024] Furthermore, the moving component includes a guide rail and a track car, the guide rail is arranged on the frame along the axial direction of the calf model; the track car is installed on the guide rail, and the track car can move on the guide rail; the third drive component is connected to the track car so that the third drive component can move along the axial direction of the calf model.

[0025] According to the above technical means, since the guide rail is arranged along the axial direction of the calf model, the third drive component can move freely along the axial direction of the calf model, which significantly improves the flexibility of the device. The third drive component can accurately locate any part of the calf model that needs to be operated, thereby simulating the intrusion of the vehicle firewall in a collision accident.

[0026] Furthermore, it also includes a joint model, one end of which is fixed to the frame, and the other end is connected to the limb model.

[0027] Based on the above technical means, the joint model is used to simulate the complex motion characteristics and mechanical behavior of the knee joint, including its ability to withstand pressure, torsion and bending, making the test environment closer to the real situation, thereby improving the accuracy and reliability of the test results.

[0028] Furthermore, the joint model includes a connecting piece and a universal joint, one end of the universal joint is fixed to the frame, and the other end is connected to the connecting piece, and is connected to the limb model through the connecting piece.

[0029] According to the above-mentioned technical means, the universal joint in the present invention can simulate the multi-directional movement characteristics of a real joint, so that the joint model can more realistically reflect the movement state of the knee joint in different directions and angles, which helps to more accurately evaluate the mechanical properties of the calf model and its knee joint under various loads and conditions during the test.

[0030] Beneficial effects achieved by the present invention:

[0031] 1. The present invention provides an axial loading component and a lateral loading component so that the device can simulate the intrusion of the vehicle floor and firewall in a collision accident, so as to comprehensively evaluate the stress conditions of the dummy's lower leg in different directions, thereby providing more comprehensive test results.

[0032] 2. The present invention integrates a calf model, including a foot model and a limb model. The one-piece design of the foot model and the limb model enables the device to simulate the structure of the human calf more realistically, ensures the continuity and accuracy of the test, and helps to more accurately evaluate the impact strength of the calf in a collision accident. At the same time, a tendon model is integrated on the limb model to simulate the gastrocnemius muscle on the calf. The connection between the tension component and the tendon model, as well as the pulling function along the axial direction of the limb model, enable the device to simulate the tension of the calf muscles in a collision accident, which helps to study the influence of muscle tension on the impact strength of the calf and provide a scientific basis for vehicle safety design and improvement.

[0033] 3. The present invention can simulate a variety of collision scenarios and muscle tension conditions, so its test results are more reliable and practical, allowing automobile manufacturers and related research institutions to more accurately evaluate vehicle safety performance and take more effective measures to improve the survival rate and injury level of passengers in collision accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of the side loading assembly of the present invention;

[0036] Figure 3It is a schematic diagram of the structure of the axial loading assembly of the present invention;

[0037] Figure 4 It is a schematic diagram of the test process of the present invention;

[0038] Among them, 1. calf model; 11. foot model; 12. limb model; 121. tendon model;

[0039] 2. Framework;

[0040] 3. Axial loading assembly; 31. Second driving assembly; 311. Second motor; 312. Coupling; 313. Bearing support; 314. Axial force loading screw; 315. Axial force loading screw sleeve; 32. Support frame; 33. Guide assembly; 331. Slide rail; 332. Roller; 34. Support platform; 35. Axial force sensor;

[0041] 4. Lateral loading assembly; 41. Third driving assembly; 411. Third motor; 412. Telescopic assembly; 4121. Lateral force loading screw sleeve; 4122. Lateral force loading screw rod; 4123. Guide rod; 42. Impact head; 43. Moving assembly; 431. Guide rail; 432. Rail car; 44. Lateral force sensor;

[0042] 5. Tension component; 51. Pull rope; 52. First drive component; 53. Tension sensor; 54. Fixed pulley;

[0043] 6. Joint model; 61. Connector; 62. Universal joint.

[0044] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The same or similar numbers correspond to the same or similar parts. The terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific embodiments should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0047] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0048] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0049] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0050] The technical solution of this embodiment is described in detail below in conjunction with specific drawings.

[0051] like Figure 1 As shown, a dummy calf impact strength test device under muscle active force includes: a calf model 1, a frame 2, an axial loading component 3 and a lateral loading component 4, the calf model 1 includes an integrally formed foot model 11 and a limb model 12, and the limb model 12 is installed on the frame 2 at one end away from the foot model 11; the axial loading component 3 is installed on the frame 2, and the axial loading component 3 abuts the bottom end of the foot model 11 to apply an axial loading force to the calf model 1 to simulate the intrusion of the vehicle floor in a collision accident; the lateral loading component 4 is installed on the frame 2, and the lateral loading component 4 abuts the limb model 12 to apply a lateral loading force to the calf model 1 to simulate the intrusion of the vehicle firewall in a collision accident; and also includes a tension component 5, a tendon model 121 is formed on the limb model 12, the tension component 5 is connected to the tendon model 121, and the tension component 5 can pull the tendon model 121 along the axial direction of the limb model 12 to simulate the tension of the calf muscle in a collision accident.

[0052] Before the test, firmly mount one end of the limb model 12 of the calf model 1 on the frame 2 to ensure that the calf model 1 is stable and motionless during the test. Install the axial loading component 3 on the frame 2 and adjust its position so that it can accurately abut against the bottom end of the foot model 11. Install the lateral loading component 4 on the frame 2 and adjust its position so that it can abut against the appropriate position of the limb model 12 to apply the lateral loading force. Connect the tension component 5 to the tendon model 121 to ensure that the connection is firm and the tension component 5 can pull the tendon model 121 along the axial direction of the limb model 12.

[0053] According to the test requirements, the loading force and loading speed of the axial loading component 3 and the lateral loading component 4 are set to simulate the strength and speed of the vehicle floor and firewall intrusion in a real collision accident. The pulling force and pulling speed of the tension component 5 are set to simulate the tension of the calf muscles in a collision accident.

[0054] During the test, the axial loading component 3 is started to apply an axial loading force to the foot model 11 to simulate the intrusion of the vehicle floor. The reaction and deformation of the calf model 1 under axial loading are observed and recorded. At the same time or after the axial loading, the lateral loading component 4 is started to apply a lateral loading force to the limb model 12 to simulate the intrusion of the vehicle firewall. Similarly, the reaction and deformation of the calf model 1 under lateral loading are observed and recorded. During the loading process, the tension component 5 is simultaneously started to pull the tendon model 121 along the axial direction of the limb model 12 to simulate the tension of the calf muscles. The reaction and deformation of the tendon model 121 under pulling are observed and recorded.

[0055] After the test, the test results were analyzed and the performance of the calf model 1 in the simulated collision accident and the performance characteristics of the tendon model 121 under traction were summarized to provide a basis for further improvement and optimization.

[0056] In this embodiment, by providing an axial loading component 3 and a lateral loading component 4, the device can simulate the intrusion of the vehicle floor and firewall in a collision accident to comprehensively evaluate the stress conditions of the dummy's lower leg in different directions, thereby providing more comprehensive test results.

[0057] This embodiment integrates the calf model 1, including the foot model 11 and the limb model 12. The one-piece design of the foot model 11 and the limb model 12 enables the device to simulate the structure of the human calf more realistically, ensures the continuity and accuracy of the test, and helps to more accurately evaluate the impact strength of the calf in a collision accident. At the same time, the limb model 12 is integrated with a tendon model 121 for simulating the gastrocnemius muscle on the calf. The connection between the tension component 5 and the tendon model 121, as well as the pulling function along the axial direction of the limb model 12, enables the device to simulate the tension of the calf muscles in a collision accident, which helps to study the influence of muscle tension on the impact strength of the calf and provide a scientific basis for vehicle safety design and improvement.

[0058] This embodiment can simulate a variety of collision scenarios and muscle tension conditions, so its test results are more reliable and practical, allowing automobile manufacturers and related research institutions to more accurately evaluate vehicle safety performance and take more effective measures to improve the survival rate and injury level of passengers in collision accidents.

[0059] like Figure 1 As shown, the tension component 5 includes a pulling rope 51 and a first driving component 52. One end of the pulling rope 51 is connected to the tendon model 121, and the other end is connected to the first driving component 52. The pulling rope 51 is arranged along the axial direction of the limb model 12. The first driving component 52 is used to pull the pulling rope 51 to move along the axial direction of the limb model 12 to apply tension to the tendon model 121 to simulate the tension of the calf muscles in a collision accident.

[0060] This embodiment can accurately control the pulling force and pulling speed of the pulling rope 51 through the first driving component 52, and can highly simulate the active tension of the calf muscles in a collision accident, making the test process closer to the actual situation and improving the accuracy and reliability of the test results.

[0061] In this embodiment, the first driving component 52 is a first motor, and the first motor is installed on the frame 2. The power output end of the first motor is connected to the pulling rope 51. When the first motor is running, the pulling rope 51 can be moved along the axial direction of the limb model 12 and wound around the power output end of the first motor to apply tension to the tendon model 121.

[0062] like Figure 1 As shown, the tension assembly 5 further includes a tension sensor 53 . The tension sensor 53 is installed on the pulling rope 51 . The tension sensor 53 is used to collect the tension of the pulling rope 51 .

[0063] The tension sensor 53 is directly installed on the pulling rope 51, and can monitor the tension on the pulling rope 51 in real time, ensuring that the specific value of the simulated calf muscle tension can be accurately obtained during the test, which is helpful to evaluate the stress condition and muscle tension performance of the calf model 1 in a collision accident, and provide a more reliable basis for vehicle safety design and human injury protection.

[0064] like Figure 1 As shown, the tension assembly 5 further includes a fixed pulley 54 , which is mounted on the frame 2 ; the other end of the pulling rope 51 passes through the fixed pulley 54 and is connected to the first driving assembly 52 .

[0065] In this embodiment, the fixed pulley 54 is used to change the direction of the force. In the test device, the traction rope 51 is connected to the first drive assembly 52 through the fixed pulley 54, so that the first drive assembly 52 can generate a driving force at a convenient position, and the traction rope 51 can transmit this force along the required direction (i.e., the simulated tension direction of the calf muscle), making the structure of the test device more flexible and able to adapt to different test requirements.

[0066] like Figure 1 and Figure 3 As shown, the axial loading assembly 3 includes a second driving assembly 31, a support frame 32 and a guide assembly 33. The support frame 32 is abutted against the foot model 11; the guide assembly 33 is arranged on the frame 2, and the guide assembly 33 is arranged along the axial direction of the calf model 1; the support frame 32 is movably mounted on the guide assembly 33, and the second driving assembly 31 is connected to the support frame 32, and the second driving assembly 31 can drive the support frame 32 to move along the axial direction of the calf model 1.

[0067] By setting the guide component 33 along the axial direction of the calf model 1, it is ensured that the support frame 32 and the loading force it carries can move accurately along the axial direction of the calf, which helps to simulate the axial pressure on the calf in real conditions.

[0068] like Figure 1 and Figure 3 As shown, in this embodiment, the axial loading component 3 also includes an axial force sensor 35, which is installed at the output end of the axial loading component 3. The axial force sensor 35 can monitor in real time and accurately record the force applied by the axial loading component 3 on the calf model 1, so as to assist in evaluating the response of the calf model 1 under specific loading conditions, studying the mechanical properties of the material, and evaluating the strength of the structure. At the same time, by monitoring the loading force in real time through the axial force sensor 35, researchers can more accurately understand the stress of the calf model 1 under different loading conditions, and then optimize the experimental design and parameter adjustment, which helps to reduce experimental time and resource consumption and improve experimental efficiency.

[0069] In this embodiment, an L-shaped support portion is formed on the support frame 32 , and the L-shaped support portion can adapt to the foot model 11 so that the foot model 11 is stably supported on the support frame 32 .

[0070] like Figure 1 and Figure 3 As shown, in this embodiment, the axial loading assembly 3 also includes a support platform 34, and the second drive assembly 31 is installed on the support platform 34 so that the output end of the second drive assembly 31 can be aligned with the calf model 1.

[0071] like Figure 3 As shown, the second drive assembly 31 includes a second motor 311, a coupling 312, a bearing support 313, an axial force loading screw 314 and an axial force loading screw sleeve 315, and the second motor 311 is installed on the support platform 34. The axial force loading screw 314 is mounted on the support platform 34 through the bearing support 313, and the axial force loading screw 314 is connected to the output end of the second motor 311 through the coupling 312, and the second motor 311 can drive the axial force loading screw 314 to rotate. The axial force loading screw sleeve 315 is provided on the outer sleeve of the axial force loading screw 314, and one end of the axial force loading screw sleeve 315 is screwed to the axial force loading screw 314. The other end of the axial force loading screw sleeve 315 is fixed on the L-shaped support portion, so that when the axial force loading screw 314 rotates, the axial force loading screw 314 can move along the length direction of the axial force loading screw 314. In this embodiment, the axial force loading screw 314 extends along the calf model 1, and then the rotation of the second motor 311 can drive the axial force loading screw 314 to move along the calf model 1, thereby pushing the support frame 32 to move.

[0072] like Figure 1 and Figure 3 As shown, the guide assembly 33 includes a slide rail 331 and a roller 332. The slide rail 331 is arranged on the frame 2, and the slide rail 331 is arranged along the axial direction of the calf model 1; the roller 332 is installed on the slide rail 331, and the roller 332 can move on the slide rail 331; the roller 332 is connected to the support frame 32 so that the support frame 32 moves along the axial direction of the calf model 1.

[0073] The design of the movement of the roller 332 on the slide rail 331 can reduce the friction and resistance during the movement, making the loading process smoother and more controllable, and ensuring that the support frame 32 and the axial loading assembly 3 connected thereto can move smoothly along the axial direction of the calf model 1. Due to the guiding effect of the slide rail 331, the roller 332 and the support frame 32 can move accurately along the preset path, which helps to achieve accurate loading position control in experiments or tests, thereby improving the accuracy and reliability of the test.

[0074] like Figure 1 and Figure 2As shown, the lateral loading assembly 4 includes a third driving assembly 41, an impact head 42 and a moving assembly 43. The third driving assembly 41 is installed on the moving assembly 43. The moving assembly 43 is arranged on the frame 2, and the moving assembly 43 can move along the axial direction of the calf model 1, so that the third driving assembly 41 can move along the axial direction of the calf model 1; the impact head 42 is installed on the third driving assembly 41, and the impact head 42 is abutted against the limb model 12, and the third driving assembly 41 can drive the impact head 42 to impact the side of the limb model 12.

[0075] The third driving assembly 41 is mounted on the moving assembly 43 and can move along the axial direction of the calf model 1, so that the impact head 42 can be accurately positioned on the side of the limb model 12 for impact testing. Accurate lateral loading helps to evaluate the response and performance of the calf model under lateral force, and provides important data support for research and development. At the same time, due to the design of the moving assembly 43, the lateral loading assembly 4 can be adjusted according to different test requirements and adapt to calf models of different sizes and shapes, thereby enabling the lateral loading assembly 4 to be widely used in mechanical property tests of various calf models, thereby improving the versatility and practicality of the equipment.

[0076] like Figure 1 As shown, in this embodiment, the third driving assembly 41 includes a third motor 411 and a telescopic assembly 412. The third motor 411 is mounted on the moving assembly 43, and the output end of the third motor 411 extends perpendicularly to the axial direction of the calf model 1. The impact head 42 is connected to the third motor 411 through the telescopic assembly 412, and the third motor 411 can drive the impact head 42 to move in a direction perpendicular to the axial direction of the calf model 1 to impact the side of the calf model 1.

[0077] like Figure 2 As shown, the telescopic assembly 412 includes a lateral force loading screw sleeve 4121, a lateral force loading screw rod 4122 and a guide rod 4123. The lateral force loading screw rod 4122 is connected to the output end of the third motor 411, and the third motor 411 can drive the lateral force loading screw rod 4122 to rotate. The impact head 42 is mounted on the lateral force loading screw sleeve 4121; the lateral force loading screw sleeve 4121 is sleeved outside the lateral force loading screw rod 4122 and is threadedly connected to the lateral force loading screw rod 4122. The guide rod 4123 is arranged parallel to the lateral force loading screw 4122, and one end of the guide rod 4123 is fixed on the moving component 43, and the other end extends into the lateral force loading screw sleeve 4121. When the third motor 411 drives the lateral force loading screw 4122 to rotate, the lateral force loading screw sleeve 4121 can move along the length direction of the lateral force loading screw 4122 (that is, along the axial direction perpendicular to the calf model 1) so that the impact head 42 on the lateral force loading screw sleeve 4121 impacts the side of the calf model 1.

[0078] like Figure 1 and Figure 2 As shown, the moving component 43 includes a guide rail 431 and a track vehicle 432. The guide rail 431 is arranged on the frame 2 along the axial direction of the calf model 1; the track vehicle 432 is installed on the guide rail 431, and the track vehicle 432 can move on the guide rail 431; the third driving component 41 is connected to the track vehicle 432 so that the third driving component 41 can move along the axial direction of the calf model 1.

[0079] In this embodiment, since the guide rail 431 is arranged along the axial direction of the calf model 1, the third drive component 41 can move freely along the axial direction of the calf model 1, which significantly improves the flexibility of the device. The third drive component 41 can be accurately positioned at any part of the calf model 1 that requires operation, thereby simulating the intrusion of the vehicle firewall in a collision accident.

[0080] like Figure 1 and Figure 2 As shown, in this embodiment, the lateral loading assembly 4 also includes a lateral force sensor 44, which is installed at the output end of the telescopic assembly 412. The lateral force sensor 44 can monitor the lateral force at the output end of the telescopic assembly 412 in real time, thereby ensuring that the lateral force during the loading process is always within the expected range. During the actual test process, the control system can adjust the output force of the telescopic assembly 412 in real time according to the feedback data of the lateral force sensor 44, to achieve more precise control, to ensure that the lateral force loaded during the test is consistent with the expected value, thereby improving the accuracy of the test, avoiding test errors caused by excessive or insufficient lateral force, and making the test results more reliable.

[0081] like Figure 1 As shown, it also includes a joint model 6, one end of which is fixed to the frame 2 and the other end is connected to the limb model 12.

[0082] The joint model 6 is used to simulate the complex motion characteristics and mechanical behaviors of the knee joint, including its ability to withstand pressure, torsion and bending, making the test environment closer to the real situation, thereby improving the accuracy and reliability of the test results.

[0083] like Figure 1 As shown, the joint model 6 includes a connecting member 61 and a universal joint 62 . One end of the universal joint 62 is fixed on the frame 2 , and the other end is connected to the connecting member 61 , and is connected to the limb model 12 through the connecting member 61 .

[0084] In this embodiment, the universal joint 62 can simulate the multi-directional movement characteristics of a real joint, so that the joint model 6 can more realistically reflect the movement state of the knee joint in different directions and angles, which helps to more accurately evaluate the mechanical properties of the calf model 1 and its knee joint under various loads and conditions during the test.

[0085] In this embodiment, the joint model 6 is cast as a whole with the limb model 12 through the connecting piece 61, avoiding the loosening or falling off problems that may exist in the traditional connection method, and improving the stability and durability of the overall structure. At the same time, the casting material is preferably polyurethane, which has high strength, toughness and biocompatibility, and can not only effectively connect the joint model 6 and the limb model 12 together, but also more realistically simulate the mechanical and biological properties of human joints.

[0086] In summary, if Figure 4 As shown, the specific test process is as follows:

[0087] Device preparation and installation:

[0088] One end of the connecting piece 61 and the calf model 1 are cast into one piece, and the other end of the connecting piece 61 is firmly mounted on the universal joint 62 on the frame 2 to ensure that the calf model 1 is stably mounted on the frame 2.

[0089] The axial loading assembly 3 is mounted on the frame 2 , and the position of the support frame 32 is adjusted by the second driving assembly 31 so that it can accurately abut against the bottom end of the foot model 11 .

[0090] The lateral loading assembly 4 is also mounted on the frame 2, and the position of the impact head 42 is adjusted by the third driving assembly 41 so that it can abut against a suitable position of the limb model 12 to apply a lateral loading force.

[0091] Connect the tension component 5 to the tendon model 121 to ensure that the connection is firm and that the tension component 5 can pull the tendon model 121 along the axial direction of the limb model 12.

[0092] Test parameter settings:

[0093] According to the test requirements, the loading force and loading speed of the axial loading component 3 and the lateral loading component 4 are set. These parameters should simulate the strength and speed of the vehicle floor and firewall intrusion in a real collision accident.

[0094] According to whether different requirements of muscle action are considered in the test, the pulling force and pulling speed of the tension component 5 are set to simulate the tension of the calf muscles in a collision accident.

[0095] Start testing:

[0096] When muscle action is not considered, the axial loading component 3 is started to apply axial loading force to the foot model 11 to simulate the situation of vehicle floor intrusion. The reaction and deformation of the calf model 1 under axial loading are observed and recorded. At the same time or after axial loading, the lateral loading component 4 is started to apply lateral loading force to the limb model 12 to simulate the situation of vehicle firewall intrusion. Similarly, the reaction and deformation of the calf model 1 under lateral loading are observed and recorded.

[0097] When the muscle effect is considered, start the axial loading component 3 to apply an axial loading force to the foot model 11 to simulate the intrusion of the vehicle floor. Observe and record the reaction and deformation of the calf model 1 under axial loading. At the same time or after the axial loading, start the lateral loading component 4 to apply a lateral loading force to the limb model 12 to simulate the intrusion of the vehicle firewall. Similarly, observe and record the reaction and deformation of the calf model 1 under lateral loading. During the loading process, start the tension component 5 at the same time to pull the tendon model 121 along the axial direction of the limb model 12 to simulate the tension of the calf muscles. Observe and record the reaction and deformation of the tendon model 121 under pulling.

[0098] Data Collection and Analysis:

[0099] Sensors (tension sensor 53, axial force sensor 35 and lateral force sensor 44) and a data acquisition system are used to collect various data during the test, such as loading force, loading speed, deformation of the calf model 1, pulling force and pulling speed of the tendon model 121, etc.

[0100] The collected data were processed and analyzed to evaluate the impact strength performance of the calf model 1 in the simulated collision accident, as well as the response and performance of the tendon model 121 under traction.

[0101] End of test and summary:

[0102] After all test steps are completed, turn off all loading and tension components.

[0103] Clean and maintain the test device to ensure it can be used normally during the next test.

[0104] Based on the test results and analysis, the performance of the calf model 1 in the simulated collision accident and the performance characteristics of the tendon model 121 under traction are summarized to provide a basis for further improvement and optimization.

[0105] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A device for testing the impact strength of a dummy calf under active muscle force, characterized in that: include: A calf model (1), a frame (2), an axial loading component (3) and a lateral loading component (4), wherein the calf model (1) comprises an integrally formed foot model (11) and a limb model (12), wherein the limb model (12) is mounted on the frame (2) at one end away from the foot model (11); the axial loading component (3) is mounted on the frame (2), and the axial loading component (3) abuts against the bottom end of the foot model (11) to apply an axial loading force to the calf model (1) to simulate the intrusion of the vehicle floor in a collision accident; the lateral loading component (4) is mounted on the frame (2), and the lateral loading component (4) abuts against the limb model (12) to apply a lateral loading force to the calf model (1) to simulate the intrusion of the vehicle firewall in a collision accident; The limb model (12) also includes a tension component (5), a tendon model (121) is formed on the limb model (12), the tension component (5) is connected to the tendon model (121), and the tension component (5) can pull the tendon model (121) along the axial direction of the limb model (12) to simulate the tension of the calf muscles in a collision accident.

2. The device for testing the impact strength of a dummy calf under active muscle force according to claim 1, characterized in that: The tension component (5) comprises a pulling rope (51) and a first driving component (52), wherein one end of the pulling rope (51) is connected to the tendon model (121), and the other end is connected to the first driving component (52), and the pulling rope (51) is arranged along the axial direction of the limb model (12), and the first driving component (52) is used to pull the pulling rope (51) to move along the axial direction of the limb model (12) to apply tension to the tendon model (121) to simulate the tension of the calf muscles in a collision accident.

3. The device for testing the impact strength of a dummy calf under active muscle force according to claim 2, characterized in that: The tension component (5) further comprises a tension sensor (53), wherein the tension sensor (53) is mounted on the pulling rope (51), and the tension sensor (53) is used to collect the tension of the pulling rope (51).

4. The device for testing the impact strength of a dummy calf under active muscle force according to claim 2, characterized in that: The tension assembly (5) further comprises a fixed pulley (54), and the fixed pulley (54) is mounted on the frame (2); the other end of the pulling rope (51) passes through the fixed pulley (54) and is connected to the first driving assembly (52).

5. The device for testing the impact strength of a dummy calf under active muscle force according to claim 1, characterized in that: The axial loading assembly (3) comprises a second driving assembly (31), a support frame (32) and a guide assembly (33), wherein the support frame (32) is in contact with the foot model (11); the guide assembly (33) is arranged on the frame (2), and the guide assembly (33) is arranged along the axial direction of the calf model (1); the support frame (32) is movably mounted on the guide assembly (33), and the second driving assembly (31) is connected to the support frame (32), and the second driving assembly (31) can drive the support frame (32) to move along the axial direction of the calf model (1).

6. The device for testing the impact strength of a dummy calf under active muscle force according to claim 5, characterized in that: The guide assembly (33) comprises a slide rail (331) and a roller (332); the slide rail (331) is arranged on the frame (2), and the slide rail (331) is arranged along the axial direction of the calf model (1); the roller (332) is installed on the slide rail (331), and the roller (332) can move on the slide rail (331); the roller (332) is connected to the support frame (32) so that the support frame (32) moves along the axial direction of the calf model (1).

7. The device for testing the impact strength of a dummy calf under active muscle force according to claim 1, characterized in that: The lateral loading component (4) comprises a third driving component (41), an impact head (42) and a moving component (43); the third driving component (41) is mounted on the moving component (43); the moving component (43) is arranged on the frame (2); and the moving component (43) is capable of moving along the axial direction of the calf model (1) so that the third driving component (41) can move along the axial direction of the calf model (1); the impact head (42) is mounted on the third driving component (41), and the impact head (42) is in contact with the limb model (12); and the third driving component (41) is capable of driving the impact head (42) to impact the side of the limb model (12).

8. The device for testing the impact strength of a dummy calf under active muscle force according to claim 7, characterized in that: The moving component (43) comprises a guide rail (431) and a track vehicle (432), wherein the guide rail (431) is arranged on the frame (2) along the axial direction of the calf model (1); the track vehicle (432) is installed on the guide rail (431), and the track vehicle (432) is capable of moving on the guide rail (431); the third driving component (41) is connected to the track vehicle (432) so that the third driving component (41) can move along the axial direction of the calf model (1).

9. The device for testing the impact strength of a dummy calf under active muscle force according to claim 1, characterized in that: It also includes a joint model (6), one end of which is fixed to the frame (2) and the other end is connected to the limb model (12).

10. The device for testing the impact strength of a dummy calf under active muscle force according to claim 9, characterized in that: The joint model (6) comprises a connecting piece (61) and a universal joint (62); one end of the universal joint (62) is fixed on the frame (2), and the other end is connected to the connecting piece (61), and is connected to the limb model (12) via the connecting piece (61).

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