Lower extremity structure for vehicle crash test

Abstract

The present application relates to the technical field of automobile crash test, and more particularly to a lower limb structure for vehicle crash test, which comprises a knee bone, a lower leg assembly arranged at one end of the knee bone, an ankle bone assembly arranged at the other end of the lower leg assembly, a foot assembly movably arranged at the other end of the ankle bone assembly, a first driving assembly arranged on the ankle bone assembly and in transmission connection with the foot assembly, and a second driving assembly arranged on the ankle bone assembly and in transmission connection with the foot assembly. The lower limb structure can actively respond to actions in the crash test, so that the test conditions and test results are closer to the real situation.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile collision testing, in particular to a lower limb structure for vehicle collision testing. Background Art

[0002] Dummies are crucial testing tools in vehicle crash tests. They simulate the injuries sustained by the human body during a vehicle collision, significantly impacting the assessment of vehicle crash safety performance and occupant protection. Currently, commonly used dummies for crash tests utilize built-in sensors to obtain relevant measurement parameters and analyze the damage to various body parts. These dummies are typically used for static crash tests.

[0003] In reality, when a driver senses that a collision is about to occur, that is, in pre-collision, the driver will perform different emergency active response actions. One of the most common actions is braking measures taken by the lower limbs to prevent collision, including directly pressing the brake pedal with the foot, or switching the foot from other pedals to the brake pedal and then pressing it. These active response actions will have a certain impact on the collision outcome.

[0004] However, the dummies currently used in automobile crash tests are simply connected at their joints. While the dummies are positioned correctly before the test, they don't actively respond during the test. Consequently, it's impossible to replicate the driver's emergency actions during a collision, nor is it possible to fully and objectively assess the driver's injuries.

[0005] Therefore, a lower limb structure for vehicle collision testing is needed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a lower limb structure for vehicle collision testing, which can actively respond to the lower limb structure during the collision test, so that the test conditions and test results are closer to the actual situation.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] Lower limb structure for vehicle crash testing, including:

[0009] kneecap;

[0010] a calf component, one end of which is disposed on the kneecap, and the calf component is capable of rotating relative to the kneecap;

[0011] An ankle bone component, one end of the ankle bone component is arranged on the other end of the calf component;

[0012] a foot component movably disposed at the other end of the ankle bone component;

[0013] a first drive assembly, the first drive assembly being disposed on the ankle bone assembly and being in transmission connection with the foot assembly, the first drive assembly being used to drive the foot assembly to rotate left and right relative to the ankle bone assembly;

[0014] A second drive assembly is provided on the ankle bone assembly and is in transmission connection with the foot assembly. The second drive assembly is used to drive the foot assembly to rotate up and down relative to the ankle bone assembly.

[0015] Furthermore, the calf component includes calf skin and a calf frame, one end of the calf frame is rotatably connected to the kneecap, the other end of the calf frame is connected to the ankle bone component, and the calf skin is arranged on the calf frame.

[0016] Furthermore, the ankle bone assembly includes a first skeleton and a first base plate, one end of the first skeleton is arranged on the calf assembly, the first base plate is fixedly arranged at the lower end of the first skeleton, and the first drive assembly and the second drive assembly are both arranged on the first base plate.

[0017] Furthermore, the first drive assembly includes a first motor, a first transmission assembly and a rotating plate, the first motor is arranged on the first base plate, and the rotating shaft of the first motor passes through the first base plate, the first transmission assembly is transmission-connected to the rotating shaft of the first motor, the rotating plate is transmission-connected to the first transmission assembly, the foot assembly is arranged on the rotating plate, and the first motor can drive the rotating plate to rotate through the first transmission assembly.

[0018] Furthermore, the first transmission assembly includes a first spur gear and a second spur gear meshing with each other, the first spur gear is arranged on the rotating shaft of the first motor, the second spur gear is rotatably arranged on the first base plate, and the second spur gear is fixedly connected to the rotating plate.

[0019] Furthermore, it also includes a first damping member, which is arranged between the ankle bone component and the first driving component and is used to adjust the torque of the first driving component to drive the foot component to rotate.

[0020] Furthermore, the second drive assembly includes a second motor, a second transmission assembly and a transmission shaft. The second motor is arranged on the first base plate, and the rotating shaft of the second motor passes through the first base plate. The second transmission assembly is transmission-connected to the rotating shaft of the second motor, and the transmission shaft is transmission-connected to the second transmission assembly. The foot assembly is arranged on the transmission shaft, and the second motor can drive the transmission shaft to rotate through the second transmission assembly.

[0021] Furthermore, the second transmission assembly includes a first bevel gear and a second bevel gear that mesh with each other, the first bevel gear is arranged on the rotating shaft of the second motor, the second bevel gear is fixedly sleeved on the transmission shaft, and the transmission shaft is connected to the foot assembly.

[0022] Furthermore, it also includes a second damping member, which is arranged on the second driving assembly and is used to adjust the torque of the second driving assembly to drive the foot assembly to rotate.

[0023] Furthermore, the foot assembly includes a second base plate and a second frame connected to each other, the second frame is in transmission connection with the first drive assembly and the second drive assembly, and foot skin is provided on the second base plate and the second frame.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides a lower limb structure for vehicle collision testing, wherein a calf assembly is rotatably connected to the kneecap, an ankle assembly is provided on the calf assembly, a foot assembly is provided on the ankle assembly, a first drive assembly provided on the ankle assembly is transmission-connected to the foot assembly, the first drive assembly can drive the foot assembly to rotate left and right relative to the ankle assembly, and a second drive assembly provided on the ankle assembly can drive the foot assembly to rotate up and down relative to the ankle assembly. In this manner, the actions of leg lifting, braking, and switching between different pedals can be simulated, and the lower limb structure can actively respond during a collision test, making the test conditions and test results more realistic. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of a lower limb structure for vehicle collision testing according to the present invention;

[0027] Figure 2 It is a schematic diagram of a lower limb structure for vehicle collision testing according to the present invention with the calf skin removed;

[0028] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0029] Figure 4It is a schematic diagram of the connection between the ankle bone component and the foot component in a lower limb structure for vehicle collision testing according to the present invention;

[0030] Figure 5 This is a partial structural cross-sectional view of the connection between the ankle bone component and the foot component in a lower limb structure for vehicle collision testing according to the present invention;

[0031] Figure 6 It is a partial structural cross-sectional view from another perspective of the connection between the ankle bone component and the foot component in a lower limb structure for vehicle collision testing of the present invention.

[0032] In the picture:

[0033] 1. Kneecap; 2. Calf assembly; 21. Calf skeleton; 3. Ankle bone assembly; 31. First skeleton; 32. First base plate; 33. First motor; 34. Second motor; 35. First transmission assembly; 351. First spur gear; 352. Second spur gear; 36. Second transmission assembly; 361. First bevel gear; 362. Second bevel gear; 37. Transmission shaft; 38. Rotating plate; 4. Foot assembly; 41. Second base plate; 42. Second skeleton; 43. Foot skin; 5. Pedal; 6. Connector; 7. First damping member; 8. Second damping member. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only show portions relevant to the present invention, not all of them.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] The dummies currently used in automotive crash tests are simply connected at their joints. After being positioned correctly before the test, they don't actively respond during the test. Consequently, they can't replicate the driver's emergency actions during a collision, nor can they fully and objectively assess the driver's injuries.

[0038] In order to solve the above problems, the lower limb structure can actively respond in the collision test, so that the test conditions and test results are closer to the real situation, such as Figures 1-6 As shown, the present invention provides a lower limb structure for vehicle collision testing, which includes a kneecap 1, a calf component 2, an ankle bone component 3, and a foot component 4.

[0039] Among them, one end of the calf component 2 is set on the kneecap 1, and the calf component 2 can rotate relative to the kneecap 1; one end of the ankle bone component 3 is fixedly set at the other end of the calf component 2; the foot component 4 is movably set at the other end of the ankle bone component 3; the first driving component is set on the ankle bone component 3 and is transmission-connected to the foot component 4, and the first driving component is used to drive the foot component 4 to rotate left and right relative to the ankle bone component 3; the second driving component is set on the ankle bone component 3 and is transmission-connected to the foot component 4, and the second driving component is used to drive the foot component 4 to rotate up and down relative to the ankle bone component 3.

[0040] Through the above method, the actions of lifting the leg, stepping on the brakes and switching between different pedals 5 can be simulated, and the lower limb structure can actively respond in the collision test, making the test conditions and test results closer to the real situation.

[0041] Furthermore, the calf assembly 2 includes calf skin and a calf frame 21. One end of the calf frame 21 is rotatably connected to the kneecap 1, and the other end of the calf frame 21 is connected to the ankle bone assembly 3. The calf skin is disposed on the calf frame 21. By rotatably connecting the calf frame 21 to the kneecap 1, the movement of the calf frame 21 can be controlled according to the needs of the on-site test, thereby meeting the needs of the on-site test.

[0042] Furthermore, the ankle bone assembly 3 includes a first frame 31 and a first base plate 32. One end of the first frame 31 is disposed on the calf assembly 2, and the first base plate 32 is fixedly disposed at the lower end of the first frame 31. The first drive assembly and the second drive assembly are both disposed on the first base plate 32. Specifically, the first frame 31 is fixedly disposed on the calf frame 21 by bolts, which facilitates the installation of the first frame 31. Moreover, since the length of the first frame 31 may vary for different genders and ages, the first frame 31 can be quickly replaced as needed during field testing. The provision of the first base plate 32 facilitates the installation and fixation of the first drive assembly and the second drive assembly.

[0043] Furthermore, the first drive assembly includes a first motor 33, a first transmission assembly 35, and a rotating plate 38. The first motor 33 is mounted on the first base plate 32, and the rotating shaft of the first motor 33 passes through the first base plate 32. The first transmission assembly 35 is in transmission connection with the rotating shaft of the first motor 33, and the rotating plate 38 is in transmission connection with the first transmission assembly 35. The foot assembly 4 is mounted on the rotating plate 38, and the first motor 33 can drive the rotating plate 38 to rotate via the first transmission assembly 35. Specifically, in this embodiment, the first frame 31 has a hollow cavity, and the first motor 33 is located in the hollow cavity. The first motor 33 drives the rotating plate 38 to rotate via the first transmission assembly 35, and the rotating plate 38 drives the foot assembly 4 to rotate, achieving left and right rotation of the foot assembly 4. During testing, the movement of switching between different pedals 5 can be effectively simulated. In this embodiment, the first motor 33 is a micro servo motor. By controlling the number of applied pulses, the rotation angle of the first motor 33 can be controlled, ensuring accurate position control.

[0044] Furthermore, the first transmission assembly 35 includes a first spur gear 351 and a second spur gear 352 that mesh with each other. The first spur gear 351 is mounted on the rotating shaft of the first motor 33, and the second spur gear 352 is rotatably mounted on the first base plate 32. The second spur gear 352 is fixedly connected to the rotating plate 38. The motor drives the first spur gear 351 to rotate, which in turn drives the second spur gear 352, thereby driving the rotating plate 38. The rotating plate 38 then drives the foot assembly 4 to rotate left and right. The use of gear transmission ensures a precise transmission ratio and accurate position control. In other embodiments, belt or chain transmissions may also be used, and this is not limited here.

[0045] Furthermore, the second drive assembly includes a second motor 34, a second transmission assembly 36, and a transmission shaft 37. The second motor 34 is mounted on the first base plate 32, and the rotating shaft of the second motor 34 passes through the first base plate 32. The second transmission assembly 36 is in transmission connection with the rotating shaft of the second motor 34, and the transmission shaft 37 is in transmission connection with the second transmission assembly 36. The foot assembly 4 is mounted on the transmission shaft 37, and the second motor 34 can drive the transmission shaft 37 to rotate via the second transmission assembly 36. In this embodiment, the first frame 31 has a hollow cavity, and the second motor 34 is located in the hollow cavity. The second motor 34 drives the transmission shaft 37 to rotate via the second transmission assembly 36, and the transmission shaft 37 drives the foot assembly 4 to rotate, achieving up and down rotation of the foot assembly 4. During testing, the force applied to the pedal 5 can be effectively adjusted. The second motor 34 is a micro servo motor. By controlling the number of applied pulses, the rotation angle of the second motor 34 can be controlled, ensuring accurate position control.

[0046] Furthermore, the second transmission assembly 36 includes a first bevel gear 361 and a second bevel gear 362 that mesh with each other. The first bevel gear 361 is fixed to the rotating shaft of the second motor 34 via a key, while the second bevel gear 362 is fixedly mounted on a transmission shaft 37, which is connected to the foot assembly 4. Specifically, a through-hole is provided in the rotating plate 38, through which the rotating shaft of the second motor 34 extends to connect to the first bevel gear 361. The first bevel gear 361 meshes with the second bevel gear 362, and the transmission shaft 37 is fixed to the second base plate 41 of the foot assembly 4. The second base plate 41 is provided with two connecting ears, and an arcuate slot is provided in the rotating plate 38. The connecting member 6 passes through the connecting ears and is positioned in the arcuate slot. The first bevel gear 361 is driven by the second motor 34 to rotate. The first bevel gear 361 drives the transmission shaft 37 through the second bevel gear 362, thereby driving the second base plate 41, achieving the up and down rotation of the foot. As the foot rotates up and down, the connecting member 6 swings back and forth in the arcuate slot. By adopting the bevel gear transmission, the transmission accuracy can be ensured, so that at the test site, the pitch angle of the foot assembly 4 can be accurately controlled according to actual needs, thereby achieving the purpose of adjusting the force applied to the pedal 5.

[0047] Furthermore, the lower limb structure for vehicle collision testing also includes a first damping member 7, which is disposed between the ankle bone assembly 3 and the first drive assembly and is used to adjust the torque applied by the first drive assembly to rotate the foot assembly 4. Specifically, the first damping member 7 is disposed in a through-hole through which the second motor 34 passes. One end of the first damping member 7 is connected to the first base plate 32, and the other end of the first damping member 7 is connected to the rotating plate 38. This structure not only ensures a compact structure, but also simulates the sensitivity of a driver's foot switching between different pedals 5 in the face of a collision by replacing the first damping member 7 with different preload forces.

[0048] Furthermore, the lower limb structure for vehicle collision testing also includes a second damping member 8, which is disposed on the second drive assembly and is used to adjust the torque with which the second drive assembly drives the foot assembly 4 to rotate. Specifically, the second damping member 8 is a spring and is disposed in the arcuate groove of the rotating plate 38. One end of the second damping member 8 abuts the arcuate groove, and the other end of the second damping member 8 abuts the connecting member 6. When adjusting the vertical angle of the foot assembly 4, the connecting member 6 slides in the arcuate groove, thereby squeezing the second damping member 8. By replacing the second damping member 8 with different pressures, different driver foot pressures on the brake pedal 5 can be simulated.

[0049] Furthermore, the foot assembly 4 includes a second base plate 41 and a second frame 42 that are interconnected. The second frame 42 is in transmission connection with the first drive assembly and the second drive assembly. Foot skin 43 is provided on the second base plate 41 and the second frame 42. Through this arrangement, the second base plate 41 is connected to the rotating plate 38 via the connector 6. The first drive assembly can mobilize the second base plate 41 for left and right rotation. The second base plate 41 is fixedly connected to the transmission shaft 37, and the second drive assembly can drive the second base plate 41 to rotate up and down.

[0050] The active response of the dummy's foot simulates the dummy's foot actively pressing pedal 5 and switching between different pedals 5. The first and second damping elements 7 and 8 simulate the sensitivity of the dummy's foot movements. Ultimately, when a vehicle is about to crash, the dummy can realistically respond to the driver's lower limb emergency response movements in the event of a collision. By fully considering the dummy's active response and the sensitivity of its execution in a collision environment, this system not only makes dummy collision injury research more realistic, but also provides technical support for the development of a highly biomimetic, holistic intelligent crash dummy system with active response behavior.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A lower limb structure for vehicle collision testing, characterized in that: include: kneecap (1); A calf component (2), one end of the calf component (2) being arranged on the kneecap (1), and the calf component (2) being capable of rotating relative to the kneecap (1); An ankle bone component (3), one end of the ankle bone component (3) is arranged on the other end of the calf component (2); A foot component (4), the foot component (4) being movably arranged at the other end of the ankle bone component (3); a first drive assembly, the first drive assembly being arranged on the ankle bone assembly (3) and being in transmission connection with the foot assembly (4), the first drive assembly being used to drive the foot assembly (4) to rotate left and right relative to the ankle bone assembly (3); a second drive assembly, the second drive assembly being arranged on the ankle bone assembly (3) and being in transmission connection with the foot assembly (4), the second drive assembly being used for driving the foot assembly (4) to rotate up and down relative to the ankle bone assembly (3); The ankle bone component (3) comprises a first frame (31) and a first base plate (32), one end of the first frame (31) is arranged on the calf component (2), the first base plate (32) is fixedly arranged on the lower end of the first frame (31), and the first drive component and the second drive component are both arranged on the first base plate (32); The first driving assembly comprises a first motor (33), a first transmission assembly (35) and a rotating plate (38); the first motor (33) is arranged on the first base plate (32), and the rotating shaft of the first motor (33) passes through the first base plate (32); the first transmission assembly (35) is transmission-connected to the rotating shaft of the first motor (33); the rotating plate (38) is transmission-connected to the first transmission assembly (35); the foot assembly (4) is arranged on the rotating plate (38); the first motor (33) can drive the rotating plate (38) to rotate through the first transmission assembly (35); The first transmission assembly (35) includes a first spur gear (351) and a second spur gear (352) meshing with each other, wherein the first spur gear (351) is arranged on the rotating shaft of the first motor (33), and the second spur gear (352) is rotatably arranged on the first base plate (32), and the second spur gear (352) is fixedly connected to the rotating plate (38).

2. The lower limb structure for vehicle collision testing according to claim 1, characterized in that: The calf component (2) includes calf skin and a calf frame (21), one end of the calf frame (21) is rotatably connected to the kneecap (1), and the other end of the calf frame (21) is connected to the ankle bone component (3), and the calf skin is arranged on the calf frame (21).

3. The lower limb structure for vehicle collision testing according to claim 1, characterized in that: It also includes a first damping member (7), which is arranged between the ankle bone component (3) and the first driving component and is used to adjust the torque of the first driving component to drive the foot component (4) to rotate.

4. The lower limb structure for vehicle collision testing according to claim 1, characterized in that: The second driving assembly includes a second motor (34), a second transmission assembly (36) and a transmission shaft (37); the second motor (34) is arranged on the first base plate (32), and the rotating shaft of the second motor (34) passes through the first base plate (32); the second transmission assembly (36) is transmission-connected to the rotating shaft of the second motor (34); the transmission shaft (37) is transmission-connected to the second transmission assembly (36); the foot assembly (4) is arranged on the transmission shaft (37); and the second motor (34) can drive the transmission shaft (37) to rotate through the second transmission assembly (36).

5. The lower limb structure for vehicle collision testing according to claim 4, characterized in that: The second transmission assembly (36) comprises a first bevel gear (361) and a second bevel gear (362) meshing with each other, wherein the first bevel gear (361) is arranged on the rotating shaft of the second motor (34), and the second bevel gear (362) is fixedly sleeved on the transmission shaft (37), and the transmission shaft (37) is connected to the foot assembly (4).

6. The lower limb structure for vehicle collision testing according to claim 1, characterized in that: It also includes a second damping member (8), which is arranged on the second driving assembly and is used to adjust the torque used by the second driving assembly to drive the foot assembly (4) to rotate.

7. The lower limb structure for vehicle collision testing according to claim 1, characterized in that: The foot assembly (4) comprises a second base plate (41) and a second frame (42) connected to each other, the second frame (42) being transmission-connected to the first drive assembly and the second drive assembly, and foot skin (43) is provided on the second base plate (41) and the second frame (42).

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