CN114323678A - Knee structure for crash dummy and adjustment method - Google Patents
Knee structure for crash dummy and adjustment method Download PDFInfo
- Publication number
- CN114323678A CN114323678A CN202111516525.7A CN202111516525A CN114323678A CN 114323678 A CN114323678 A CN 114323678A CN 202111516525 A CN202111516525 A CN 202111516525A CN 114323678 A CN114323678 A CN 114323678A
- Authority
- CN
- China
- Prior art keywords
- piece
- connecting rod
- knee
- leg bone
- knee structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000003127 knee Anatomy 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 17
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 47
- 230000033001 locomotion Effects 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims description 23
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 230000036316 preload Effects 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 238000013016 damping Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 12
- 210000000629 knee joint Anatomy 0.000 abstract description 9
- 230000006378 damage Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 208000027418 Wounds and injury Diseases 0.000 abstract description 7
- 208000014674 injury Diseases 0.000 abstract description 7
- 238000009863 impact test Methods 0.000 abstract description 3
- 230000003116 impacting effect Effects 0.000 abstract 1
- 210000003041 ligament Anatomy 0.000 description 4
- 206010039203 Road traffic accident Diseases 0.000 description 3
- 210000004439 collateral ligament Anatomy 0.000 description 3
- 210000002414 leg Anatomy 0.000 description 3
- 241001227561 Valgus Species 0.000 description 2
- 241000469816 Varus Species 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000001264 anterior cruciate ligament Anatomy 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000001930 leg bone Anatomy 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000002967 posterior cruciate ligament Anatomy 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
The invention relates to the field of automobile safety collision test dummy, in particular to a knee structure for a collision dummy and an adjusting method. The knee structure comprises an upper leg bone connecting piece, a friction plate, a central connecting block, a connecting rod, a lower leg bone connecting piece and a cover plate, wherein the upper leg bone connecting piece can rotate around the friction plate and the central connecting block and realize up-and-down movement; the top end of the connecting rod is arranged inside the central connecting block and is connected with the first ball sleeve and the second ball sleeve; the top of connecting rod still is provided with first locating part, and the top of connecting rod can rotate around first locating part. The knee structure can reproduce all degrees of freedom of the knee joint of a human body, can reflect the stress mode of the knee in the impacting process, more accurately evaluate the impact injury of a vehicle to a pedestrian, and improve the effectiveness of an impact test.
Description
Technical Field
The invention relates to the field of automobile safety collision test dummy, in particular to a knee structure for a collision dummy and an adjusting method.
Background
With the year-by-year increase of automobile reserves in China, traffic accidents are also increased sharply. Traffic accidents in which pedestrians and vehicles collide directly occupy a large proportion of them, and in this type of traffic accidents, the knee is often the part of the body that is most subject to injury, while the knee joint acts as the most complex joint in the body, and the healing process is lengthy and expensive.
In order to improve the safety of an automobile against pedestrian collision, special pedestrian standing collision dummy is often adopted to carry out relevant collision tests, and the degree of injury of the vehicle to lower limbs of pedestrians during collision is evaluated through the tests. Because the existing pedestrian collision dummy greatly simplifies knee joints, only can realize single bending freedom degree and is in rigid connection, the stress mode of the outer collateral ligament, the inner collateral ligament, the anterior cruciate ligament and the posterior cruciate ligament of the knee part in the collision process cannot be simulated, and the collision injury of vehicles to pedestrians cannot be accurately evaluated. In the Pedestrian protection regulation test tests of various countries, the safety test is mainly carried out by adopting a leg throwing type (TRL Pedestrian strains, aPLILegform), knee ligaments of the knee ligaments are replaced by cables, on one hand, the ligament force can not be adjusted, and the weight support of the whole dummy can not be realized; on the other hand, the testing mode of replacing the whole body by the local part cannot truly reflect the whole impact response of the pedestrian. CN200610011609.4 proposes a four-degree-of-freedom dummy knee joint mechanism for human body collision protection test, which firstly can not truly reproduce the six-degree-of-freedom motion response state of the human body knee, secondly, the mechanism also adopts a cable to simulate the leg type of the knee ligament, and the technical problems existing in the above leg throwing type test also exist.
Therefore, there is a need for developing a knee joint module suitable for a pedestrian collision test dummy, which has all degrees of freedom of a human knee joint, and can reflect the stress mode of the knee in the collision process, so as to accurately evaluate the collision damage of a vehicle to a pedestrian and improve the effectiveness of a collision test.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a knee structure for a crash dummy and an adjusting method, so that the reproduction of all degrees of freedom of the knee joint of a human body is realized, the stress mode of the knee in the impact process can be reflected, the impact injury of a vehicle to a pedestrian is more accurately evaluated, and the effectiveness of a crash test is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a knee structure for a crash dummy, comprising:
the upper leg bone connecting piece, the friction plate and the central connecting block are sequentially arranged from top to bottom, and the upper leg bone connecting piece can rotate around the friction plate and the central connecting block and realize up-and-down movement;
a first ball sleeve, a first elastic piece and a first pressing plate are sequentially arranged in front of the central connecting block, and a second ball sleeve, a second elastic piece and a second pressing plate are sequentially arranged behind the central connecting block;
the top end of the connecting rod is arranged inside the central connecting block and is connected with the first ball sleeve and the second ball sleeve; the top end of the connecting rod is also provided with a first limiting piece, and the top end of the connecting rod can rotate around the first limiting piece; a connecting rod metal pad is arranged at the bottom end of the connecting rod, and second limiting parts are respectively arranged on two sides of the connecting rod metal pad;
the lower leg bone connecting piece, the connecting rod metal pad and the second limiting piece are arranged in the lower leg bone connecting piece;
the cover plate is arranged in front of or behind the lower leg bone connecting piece and connected with the lower leg bone connecting piece through a bolt and at least one limiting pin.
In a second aspect, the present invention provides an adjustment method for a knee structure of a crash dummy as described above, comprising:
adjusting the stretching force of the knee structure according to the friction coefficient between the upper leg bone connecting piece and the friction plate;
adjusting the front and back displacement damping force of the knee structure according to the length variation and the elastic coefficient of the first elastic piece and the second elastic piece;
and adjusting the axial rotation torsional damping force of the knee structure according to the friction coefficient between the metal pad of the connecting rod and the second limiting part, the pressure between the limiting pin and the second limiting part and the diameter of the connecting rod.
Compared with the prior art, the invention has the beneficial effects that:
the upper leg bone connecting piece in the knee structure for the collision dummy provided by the invention can rotate around the friction plate and the central connecting block and realize up-and-down motion, so that the varus/valgus freedom degree and the top/bottom movement freedom degree of the knee are simulated; the first ball sleeve, the first elastic piece and the first pressing plate arranged in front of the central connecting block form a first distance displacement system, the second ball sleeve, the second elastic piece and the second pressing plate arranged behind the central connecting block form a second distance displacement system, the connecting rod and the first limiting piece form a connecting rod displacement system, and the three distance displacement systems jointly form the front-back movement freedom degree of the knee; the top end of the connecting rod can rotate around the first limiting piece, so that the flexion-extension rotational freedom degree of the knee is realized; the connecting rod metal pad and the second limiting part can form a rotation limiting system, the bolt, the limiting pin, the cover plate and the lower leg bone connecting piece form a rotation main body, and the rotation limiting system and the rotation main body jointly realize the axial rotation freedom degree and the inner and outer side movement freedom degrees of the knee. Therefore, the knee structure can realize six degrees of freedom, so that all degrees of freedom of the knee joint of a human body can be well simulated, the stress mode of the knee in the impact process can be accurately reflected, the impact injury of a vehicle to a pedestrian can be accurately evaluated, and the effectiveness of an impact test is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic illustration of a human knee in degrees of freedom;
FIG. 2 is an exploded schematic view of a knee structure for a crash dummy provided by the present invention;
FIG. 3 is a schematic view of a first orientation of a knee structure for a crash dummy provided by the present invention;
FIG. 4 is a schematic view of a knee structure for a crash dummy in a second orientation provided by the present invention;
FIG. 5 is a cross-sectional view of a knee structure for a crash dummy provided by the present invention;
FIG. 6 is a cross-sectional view of a lower leg bone attachment element provided by the present invention;
FIG. 7 is an assembly schematic of the cover plate and tie bar provided by the present invention;
fig. 8 is an assembly view of the connecting rod and the center connecting block provided by the present invention.
Icon: 1-upper leg bone connector; 2-friction plate; 3-a central connection block; 4-a connecting rod; 5-a lower leg bone connector; 6 a-a second platen; 6 b-a first platen; 7 a-a first pre-tightening bolt; 7 b-a second pre-tightening bolt; 8 a-a first pre-tightening cushion block; 8 b-a second pre-tightening cushion block; 9-cover plate; 10-a second elastic member; 11-a first elastic member; 12-tie bar metal pads; 13 a-a second ball sleeve; 13 b-a first ball sleeve; 14-a first stop nut; 15-a first limit screw; 16 a-a first spacing pin; 16 b-a second spacing pin; 17 a-a first rubber cushion block; 17 b-a second rubber mat.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, which is a schematic diagram of the degrees of freedom of a human knee, it can be seen that the human knee has six degrees of freedom, namely, a top/bottom movement degree of freedom, a flexion-extension rotation degree of freedom, an inversion/eversion degree of freedom, an axial rotation degree of freedom, an inner-outer movement degree of freedom and a front-back movement degree of freedom.
As shown in fig. 2 to 8, the present embodiment provides a knee structure for a crash dummy, the knee structure including:
the upper leg bone connecting piece 1 can rotate around the friction plate 2 and the central connecting block 3 and realize up-and-down movement;
a first ball sleeve 13b, a first elastic piece 11 and a first pressing plate 6b are sequentially arranged in front of the central connecting block 3, and a second ball sleeve 13a, a second elastic piece 10 and a second pressing plate 6a are sequentially arranged behind the central connecting block 3;
the top end of the connecting rod 4 is arranged inside the central connecting block 3 and is connected with the first ball sleeve 13b and the second ball sleeve 13 a; the top end of the connecting rod 4 is also provided with a first limiting part, and the top end of the connecting rod 4 can rotate around the first limiting part; a connecting rod metal pad 12 is arranged at the bottom end of the connecting rod 4, and second limiting parts are respectively arranged at two sides of the connecting rod metal pad 12;
the lower leg bone connecting piece 5, the connecting rod metal pad 12 and the second limiting piece are arranged in the lower leg bone connecting piece 5;
and the cover plate 9 is arranged in front of the lower leg bone connecting piece 5, and the cover plate 9 is connected with the lower leg bone connecting piece 5 through a bolt and at least one limiting pin.
The upper leg bone connecting piece in the knee structure for the collision dummy can rotate around the friction plate and the central connecting block and realize up-and-down motion, so that the varus/valgus freedom degree and the top/bottom movement freedom degree of the knee are simulated; the first ball sleeve, the first elastic piece and the first pressing plate arranged in front of the central connecting block form a first distance displacement system, the second ball sleeve, the second elastic piece and the second pressing plate arranged behind the central connecting block form a second distance displacement system, the connecting rod and the first limiting piece form a connecting rod displacement system, and the three distance displacement systems jointly form the front-back movement freedom degree of the knee; the top end of the connecting rod can rotate around the first limiting piece, so that the flexion-extension rotational freedom degree of the knee is realized; the connecting rod metal pad and the second limiting part can form a rotation limiting system, the bolt, the limiting pin, the cover plate and the lower leg bone connecting piece form a rotation main body, and the rotation limiting system and the rotation main body jointly realize the axial rotation freedom degree and the inner and outer side movement freedom degrees of the knee. Therefore, the knee structure can realize six degrees of freedom, so that all degrees of freedom of the knee joint of a human body can be well simulated, the stress mode of the knee in the impact process can be accurately reflected, the impact injury of a vehicle to a pedestrian can be accurately evaluated, and the effectiveness of an impact test is improved.
Further, the top end of the connecting rod 4 is provided in a spherical shape. As can be seen from fig. 5, the top end of the connecting rod 4, the first ball socket 13b and the second ball socket 13a form a hemispherical hinge fit.
Furthermore, two sides of the upper leg bone connecting piece 1 are provided with first openings, two sides of the friction plate are provided with second openings, and two sides of the central connecting block are provided with grooves;
the preload piece is arranged in the first opening and the second opening in a penetrating mode, and one end of the preload piece is arranged in the groove;
the preload member has a cross-sectional area smaller than a cross-sectional area of the first opening.
Further, the upper leg bone connecting piece 1, the friction plate 2 and the central connecting piece 3 are connected through a prefastening piece and are assembled in a clearance fit mode. By adopting the assembly mode, the rotating range of the preload piece can be kept between-15 and 15 degrees.
Further, the pretensioning piece includes first pretensioning piece and second pretensioning piece, and first pretensioning piece and second pretensioning piece set up respectively in the left and right sides of central connecting block 3. Different torques are applied to the two pre-tightening pieces, and the adjusting action of different acting forces on the inner side and the outer side of different joints is simulated according to the law of dynamic friction.
Optionally, the first preload member includes a first preload bolt 7a and a first preload block 8a and the second preload member includes a second preload bolt 7b and a second preload block 8 b. The tightening torque of the first pre-tightening bolt 7a and the second pre-tightening bolt 7b is adjustable.
Further, the length of the first elastic member 11 is greater than the length of the second elastic member 10. The first ball sleeve, the first elastic piece and the first pressing plate form a long-distance displacement system (the movement range can be 0-10mm), and the second ball sleeve, the second elastic piece and the second pressing plate form a short-distance displacement system (the movement range can be 0-5 mm).
Optionally, the first elastic member and the second elastic member are both springs. The first elastic member is a long spring and the second elastic member is a short spring.
Further, the top end of the connecting rod 4 is set to be spherical, the first limiting part comprises a first limiting nut 14 and a first limiting screw 15, and the first limiting screw 15 penetrates through the top end of the spherical connecting rod 4 and is connected with the first limiting nut 14. The connecting rod 4 can rotate around the first limiting part, and the first elastic part and the second elastic part on the two sides are used for simulating different damping forces and different movement displacement amounts of the knee device in the process of impact.
Furthermore, a connecting rod metal pad is arranged in a groove reserved at the bottom end of the connecting rod, and the connecting rod metal pad and the connecting rod form transition fit; the connecting rod metal pad and the second limiting part form clearance fit with the lower leg bone connecting piece as a whole. The lower leg bone connecting piece can be provided with a blind hole for placing the connecting rod metal pad and the second limiting piece therein.
Optionally, the connecting rod metal pad is made of copper, and the second limiting member is made of rubber. The second limiting member includes a first rubber block 17a and a second rubber block 17 b.
Optionally, the first pressing plate 6b is a flange pressing plate, and the first pressing plate, the first elastic member and the first ball sleeve are mounted in front of the central connecting block by using hexagon socket head cap fastening bolts arranged in the flange holes. The second pressing plate is similar to the first pressing plate, and is not described again.
Optionally, a first limit pin 16a and a second limit pin 16b are arranged on the cover plate 9, the first limit pin 16a and the second limit pin 16b are inserted into a reserved pin hole in front of the lower leg bone connecting piece 5, and the cover plate 9 is further fixedly connected with the lower leg bone connecting piece 5 through a hexagon socket head cap screw.
The present embodiment also provides an adjustment method for a knee structure of a crash dummy, including:
adjusting the stretching force of the knee structure according to the friction coefficient between the upper leg bone connecting piece and the friction plate;
adjusting the front and back displacement damping force of the knee structure according to the length variation and the elastic coefficient of the first elastic piece and the second elastic piece;
and adjusting the axial rotation torsional damping force of the knee structure according to the friction coefficient between the metal pad of the connecting rod and the second limiting part, the pressure between the limiting pin and the second limiting part and the diameter of the connecting rod.
Further, the adjusting of the stretching force of the knee structure according to the friction coefficient between the upper leg bone connecting member and the friction plate includes:
and adjusting the drawing force of the knee structure according to the friction coefficient between the upper leg bone connecting piece and the friction plate, the diameter of the pre-tightening piece and the tightening torque of the pre-tightening piece.
The pre-tightening bolt has a tightening torque of MLMCTiThe coefficient of tightening torque k of the pre-tightening bolt and the nominal diameter d of the pre-tightening boltLMCTAxial force F of pre-tightened boltLMZi。
The relationship between the bolt axial force and the tightening torque is shown as follows:
during the tightening of the bolt, the axial force applied between the upper leg bone attachment member 1 and the friction plate 2 is subjected to a stress per unit area of qiIn the aspect that the friction force generated in the motion process always follows the tangent line of the cylindrical surface, the generated friction force is set as Ffi。
FLMZi＝∫s·qids(i＝1,2)
dFfi＝μ×qi(i＝1,2)
Ffi＝∫μ·qids(i＝1,2)
Simulated knee extension force FLIGiThe tightening torque is related by the following formula:
FLIGi＝δ×∫μ×qids(i＝1.2)
where δ is the safety factor.
Tightening torque coefficient k of pre-tightening bolt and nominal diameter d of pre-tightening boltLMCTFor determining values, friction plates are selected according to relevant manuals according to the tension tolerance limit values of the medial and lateral collateral ligaments of different human knees, and then the tightening torque of the pre-tightening bolt is selected.
The elastic coefficient of the short spring is lambdaSThe spring length variation is LS∈[0,5]Short spring force of FS(ii) a Elastic coefficient of long spring is lambdaLThe spring length variation is LL∈[0,10]Long spring force of FL。
FS＝λS×LS
FL＝λL×LL
Short and long spring compression F during impact of the knee deviceSAnd FLDifferent, the allowable spring variation ranges of the two are also different.
The friction coefficient between the limit pin and the rubber cushion block is muDOWThe friction force generated by the interaction of the two is FfDOWThe diameter of the connecting rod is d, and after the assembly is completed, no pressure F exists between the limiting pin and the rubber cushion blocknDOWAnd thus its frictional force may be considered not to be changed.
FfDOW＝μDOW×FnDOW
The generated torque MDOWCan be expressed as:
the friction plate, the short spring, the long spring, the first rubber cushion block, the second rubber cushion block and the pre-tightening bolt tightening torque can be selected by inquiring a relevant manual.
The present embodiment also provides an impact dummy including the above-described knee structure for an impact dummy. The crash dummy includes the above-described knee structure and thus has at least the same advantages as the above-described knee structure.
It should be understood that the crash dummy has a core in that the above-described knee structure is employed, and the connection between the knee structure and other components of the dummy may be any one that can be realized in the art, and the embodiment is not particularly limited, for example, the upper leg bone connecting member is connected to the upper leg bone of the dummy and the lower leg bone connecting member is connected to the lower leg bone of the dummy.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.
Claims (9)
1. A knee structure for a crash dummy, comprising:
the upper leg bone connecting piece, the friction plate and the central connecting block are sequentially arranged from top to bottom, and the upper leg bone connecting piece can rotate around the friction plate and the central connecting block and realize up-and-down movement;
a first ball sleeve, a first elastic piece and a first pressing plate are sequentially arranged in front of the central connecting block, and a second ball sleeve, a second elastic piece and a second pressing plate are sequentially arranged behind the central connecting block;
the top end of the connecting rod is arranged inside the central connecting block and is connected with the first ball sleeve and the second ball sleeve; the top end of the connecting rod is also provided with a first limiting piece, and the top end of the connecting rod can rotate around the first limiting piece; a connecting rod metal pad is arranged at the bottom end of the connecting rod, and second limiting parts are respectively arranged on two sides of the connecting rod metal pad;
the lower leg bone connecting piece, the connecting rod metal pad and the second limiting piece are arranged in the lower leg bone connecting piece;
the cover plate is arranged in front of or behind the lower leg bone connecting piece and connected with the lower leg bone connecting piece through a bolt and at least one limiting pin.
2. The knee structure for a crash dummy according to claim 1, wherein the upper leg bone connecting member, the friction plate and the center connecting block are connected by a preload member and assembled by a clearance fit.
3. The knee structure for a crash dummy according to claim 2, wherein first openings are provided at both sides of the upper leg bone connecting member, second openings are provided at both sides of the friction plate, and grooves are provided at both sides of the center connecting block;
the preload piece is arranged in the first opening and the second opening in a penetrating mode, and one end of the preload piece is arranged in the groove;
the preload member has a cross-sectional area smaller than a cross-sectional area of the first opening.
4. The knee structure for crash dummy according to claim 2, wherein the preload members include a first preload member and a second preload member, which are respectively provided at left and right sides of the center connection block.
5. The knee structure for a crash dummy of claim 1, wherein the first elastic member has a length greater than a length of the second elastic member.
6. The knee structure for a crash dummy of claim 1, wherein the top end of the connecting rod is provided in a spherical shape, and the first stopper includes a first stopper nut and a first stopper screw, the first stopper screw being inserted through the top end of the spherical connecting rod and connected to the first stopper nut.
7. The knee structure for a crash dummy of any one of claims 1-6, wherein the tie bar metal pads are disposed in grooves reserved at the bottom ends of the tie bars, the tie bar metal pads forming a transition fit with the tie bars; the connecting rod metal pad and the second limiting part form clearance fit with the lower leg bone connecting piece as a whole.
8. The adjustment method for a knee structure of a crash dummy as set forth in any one of claims 1 to 7, comprising:
adjusting the stretching force of the knee structure according to the friction coefficient between the upper leg bone connecting piece and the friction plate;
adjusting the front and back displacement damping force of the knee structure according to the length variation and the elastic coefficient of the first elastic piece and the second elastic piece;
and adjusting the axial rotation torsional damping force of the knee structure according to the friction coefficient between the metal pad of the connecting rod and the second limiting part, the pressure between the limiting pin and the second limiting part and the diameter of the connecting rod.
9. The adjustment method of claim 8, wherein adjusting the knee brace according to the coefficient of friction between the upper leg bone attachment member and the friction plate comprises:
and adjusting the drawing force of the knee structure according to the friction coefficient between the upper leg bone connecting piece and the friction plate, the diameter of the pre-tightening piece and the tightening torque of the pre-tightening piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111516525.7A CN114323678B (en) | 2021-12-13 | 2021-12-13 | Knee structure for collision dummy and adjustment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111516525.7A CN114323678B (en) | 2021-12-13 | 2021-12-13 | Knee structure for collision dummy and adjustment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114323678A true CN114323678A (en) | 2022-04-12 |
| CN114323678B CN114323678B (en) | 2024-04-09 |
Family
ID=81051279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111516525.7A Active CN114323678B (en) | 2021-12-13 | 2021-12-13 | Knee structure for collision dummy and adjustment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114323678B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4276032A (en) * | 1980-06-20 | 1981-06-30 | Woley Paul F | Knee joint for anthropomorphic dummy |
| CN1827317A (en) * | 2006-04-07 | 2006-09-06 | 清华大学 | 4-DOF dummy model knee-joint mechanism for body bump protection test |
| CN1874738A (en) * | 2003-10-29 | 2006-12-06 | 瑞特医疗技术公司 | Tibial knee prosthesis |
| JP2009095957A (en) * | 2007-10-19 | 2009-05-07 | Nsk Ltd | Joint module and legged robot |
| CN102793596A (en) * | 2012-07-25 | 2012-11-28 | 中国人民解放军空军航空医学研究所 | Dynamic knee joint, dynamic ankle joint prosthesis and dynamic lower-limb prosthesis |
| CN102940542A (en) * | 2012-10-23 | 2013-02-27 | 华中科技大学 | Artificial limb ankle joint with four passive degrees of freedom |
| CN212021403U (en) * | 2020-01-16 | 2020-11-27 | 湖南赛孚汽车科技股份有限公司 | Mixed III 50 th percentile dummy right knee skin mold |
| CN112729744A (en) * | 2021-01-07 | 2021-04-30 | 上海中氐实业股份有限公司 | Integral pedestrian protection dummy design method for collision experiment |
| CN112937717A (en) * | 2021-02-03 | 2021-06-11 | 南方科技大学 | Bionic mechanical leg and bionic robot |
-
2021
- 2021-12-13 CN CN202111516525.7A patent/CN114323678B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4276032A (en) * | 1980-06-20 | 1981-06-30 | Woley Paul F | Knee joint for anthropomorphic dummy |
| CN1874738A (en) * | 2003-10-29 | 2006-12-06 | 瑞特医疗技术公司 | Tibial knee prosthesis |
| CN1827317A (en) * | 2006-04-07 | 2006-09-06 | 清华大学 | 4-DOF dummy model knee-joint mechanism for body bump protection test |
| JP2009095957A (en) * | 2007-10-19 | 2009-05-07 | Nsk Ltd | Joint module and legged robot |
| CN102793596A (en) * | 2012-07-25 | 2012-11-28 | 中国人民解放军空军航空医学研究所 | Dynamic knee joint, dynamic ankle joint prosthesis and dynamic lower-limb prosthesis |
| CN102940542A (en) * | 2012-10-23 | 2013-02-27 | 华中科技大学 | Artificial limb ankle joint with four passive degrees of freedom |
| CN212021403U (en) * | 2020-01-16 | 2020-11-27 | 湖南赛孚汽车科技股份有限公司 | Mixed III 50 th percentile dummy right knee skin mold |
| CN112729744A (en) * | 2021-01-07 | 2021-04-30 | 上海中氐实业股份有限公司 | Integral pedestrian protection dummy design method for collision experiment |
| CN112937717A (en) * | 2021-02-03 | 2021-06-11 | 南方科技大学 | Bionic mechanical leg and bionic robot |
Non-Patent Citations (4)
| Title |
|---|
| WEILIN YANG等: "Design and injury analysis of the seated occupant protection posture in train collision", SAFETY SCIENCE, vol. 117, 31 August 2019 (2019-08-31), pages 263 - 275 * |
| 卢本兴, 韩文仲: "气压膝关节下肢假肢的分析与研究", 华北航天工业学院学报, no. 02, 28 June 2003 (2003-06-28), pages 2 - 6 * |
| 王欣等: "TNO-10型碰撞假人的研制", 客车技术与研究, vol. 36, no. 2, 25 April 2014 (2014-04-25), pages 51 - 53 * |
| 谭珂等: "一种膝关节镜手术仿真***", ***仿真学报, no. 20, 20 October 2007 (2007-10-20), pages 4649 - 4653 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114323678B (en) | 2024-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8840404B2 (en) | Rib cage assembly for crash test dummy | |
| Deng | Anthropomorphic dummy neck modeling and injury considerations | |
| CN208792152U (en) | A kind of bridge security safeguard structure | |
| Ivancic et al. | Biofidelic whole cervical spine model with muscle force replication for whiplash simulation | |
| CN114323678A (en) | Knee structure for crash dummy and adjustment method | |
| Voo et al. | Static and dynamic bending responses of the human cervical spine | |
| KR20060085409A (en) | Apparatus for training nether limbs | |
| JP4226367B2 (en) | Leg impactor for pedestrian protection test | |
| Khalil et al. | Simulation of the Hybrid III dummy response to impact by nonlinear finite element analysis | |
| Bowman et al. | Parameter study of biomechanical quantities in analytical neck models | |
| CN209305695U (en) | A kind of automobile front floor rear cross beam assembly | |
| Konosu et al. | Development of a biofidelic flexible pedestrian legform impactor | |
| Kikuchi et al. | Full-scale validation of a human FE model for the pelvis and lower limb of a pedestrian | |
| WO2009101200A1 (en) | An impact test joint for a crash test dummy and coupling mechanism therefor | |
| CN212022337U (en) | A mounting structure for instrument board | |
| Takahashi et al. | Development of a Full‐Body Human FE Model for Pedestrian Crash Reconstructions | |
| Neilson et al. | The EUROSID side impact dummy | |
| Wittek et al. | A new legform impactor for evaluation of car aggressiveness in car-pedestrian accidents | |
| Rudd et al. | Biofidelity evaluation of dynamic and static response characteristics of the THOR LX dummy lower extremity | |
| Untaroiu et al. | Biomechanical injury response of leg subjected to combined axial compressive and bending loading | |
| CN220847078U (en) | Multidirectional anti-seismic elastic limiting device for bridge and bridge | |
| Arnoux et al. | Radioss finite element model of the Thor dummy | |
| Ono et al. | Biomechanical response of human cervical spine to direct loading of the head | |
| Gotou et al. | A comparison between BioRID AND Hybrid III head/neck/torso response in middle speed sled rear impact tests | |
| CN211139245U (en) | Flexible shank collision bearing structure of car and car |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |