CN110186765B - Strength simulation testing device of bone-knitting nail - Google Patents
Strength simulation testing device of bone-knitting nail Download PDFInfo
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- CN110186765B CN110186765B CN201910573746.4A CN201910573746A CN110186765B CN 110186765 B CN110186765 B CN 110186765B CN 201910573746 A CN201910573746 A CN 201910573746A CN 110186765 B CN110186765 B CN 110186765B
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- bone
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- 238000004088 simulation Methods 0.000 title claims abstract description 55
- 238000012360 testing method Methods 0.000 title claims abstract description 17
- 238000009940 knitting Methods 0.000 title claims abstract description 6
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 208000010392 Bone Fractures Diseases 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 4
- 206010017076 Fracture Diseases 0.000 description 8
- 230000035876 healing Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000006670 Multiple fractures Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008468 bone growth Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Surgical Instruments (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
The invention relates to a strength simulation test device of a bone-knitting nail, which comprises a fixing device, wherein the fixing device comprises two fixing parts which are symmetrically arranged, the fixing parts are provided with fixing planes which are arranged in parallel, and the fixing parts are connected with a driving mechanism, so that the two fixing parts are close to or far away from each other along a straight line to clamp and fix a guide part, the guide part is provided with a fixing plane which corresponds to the fixing parts, the guide part is connected with a simulation part, and the simulation part is suitable for simulating human bones; and the displacement device is connected with the fixing device, so that the fixing device moves along the axial direction of the simulation part. The invention has reasonable structural design, and doctors can simulate the connecting position of the steel plate and the bone screw according to the specific details of CT shooting and preliminarily simulate the stress condition of the bone screw, so that the fixation of the steel plate and the bone screw is more accurate and reasonable, the pain feeling of a patient after the bone screw and the steel plate are connected is reduced, and the fracture part is accurately guided and fixed.
Description
Technical Field
The invention relates to a strength simulation test device of a bone screw.
Background
The bone screw is often needed to be used for connecting a steel plate to a fracture injured part in an orthopedic operation, a doctor needs to carry out CT shooting on the injured part before an operation, then the doctor combines own experience to operate in the operation according to specific details of CT shooting, but sometimes the condition of the fracture is variable, slight deviation may occur on the combination position of the steel plate and the bone screw in the operation, particularly for doctors with insufficient experience, the correct drilling position of the bone screw is difficult to grasp, and after errors occur in the position installation of the bone screw in the operation, great pain is brought to a patient, and the normal growth and recovery of bones are affected.
Disclosure of Invention
The invention provides a strength simulation testing device of a bone screw, which has reasonable structural design, and a doctor can simulate the connecting position of a steel plate and the bone screw according to the specific details of CT shooting and preliminarily simulate the stress condition of the bone screw, so that the fixation of the steel plate and the bone screw is more accurate and reasonable, the pain feeling of a patient after the bone screw and the steel plate are connected is reduced, the fracture part is accurately guided and fixed, the subsequent healing and rehabilitation of the fracture part are facilitated, and the problems in the prior art are solved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the strength simulation test device of bone-knitting nail includes:
the fixing device comprises two fixing parts which are symmetrically arranged, the fixing parts are provided with fixing planes which are arranged in parallel, the fixing parts are connected with a driving mechanism, so that the two fixing parts are close to or far away from each other along a straight line to clamp and fix a guide part, the guide part is provided with the fixing planes which correspond to the fixing parts, the guide part is connected with a simulation part, and the simulation part is suitable for simulating human bones;
the displacement device is connected with the fixing device and enables the fixing device to move along the axial direction of the simulation part;
the fixing devices and the displacement devices are provided with two groups which correspond to each other, the two fixing devices are used for clamping the two guide parts and the two simulation parts respectively, the two simulation parts are arranged corresponding to each other, the two simulation parts are connected through a steel plate and a bone screw, the bone screw penetrates through the steel plate and is connected in the simulation parts, and the simulation parts and the guide parts move along the axial direction of the fixing piece after being subjected to axial acting force;
effort feedback device, effort feedback device is including setting up the pressure sensor inside two mountings, pressure sensor corresponds the axial setting of guide part, is suitable for the first effort that produces after detecting the guide part along axial displacement, the second effort that first effort and bone fracture nail received simultaneously is positive correlation.
Furthermore, the driving mechanism comprises a driving bevel gear, the driving bevel gear is connected with the rotating shaft, the driving bevel gear is meshed with the two driven bevel gears, the two driven bevel gears are respectively connected with the two threaded rods, the threaded rods are in threaded fit with the sleeves, the sleeves are connected with the fixing part, a limiting part is arranged outside the sleeves along the axial direction of the sleeves, the limiting part is connected with the connecting frame, the connecting frame is connected with the support, and the support is connected with the displacement device; the limiting part is suitable for limiting the sleeve to rotate along the circumferential direction of the sleeve, so that the sleeve only displaces along the axial direction when the threaded rod rotates.
Furthermore, the outer wall of the sleeve is provided with a plane matched with the limiting part, and the outer wall of the sleeve is of a prismatic structure.
Furthermore, one end of the rotating shaft is hinged with the connecting frame, and the other end of the rotating shaft penetrates through the support and is connected with the rotating part.
Furthermore, the displacement device is a screw slider mechanism, the support is connected with the sliders of the screw slider mechanism, and the screws of the two screw slider mechanisms are connected with the double-shaft-extension asynchronous motor, so that the sliders of the two screw slider mechanisms synchronously move in opposite directions or relatively move.
Furthermore, a plurality of guide wheels are arranged on the opposite plane of the fixing piece, and the guide wheels are arranged along the axial direction of the simulation part.
Furthermore, the pressure sensors are connected with the connecting frame, and the pressure sensors are arranged at intervals.
Furthermore, one side of the fixing part is provided with a baffle plate, and the two baffle plates of the two fixing parts of the same fixing device are arranged in a staggered and corresponding mode to fix the guide part.
Further, the rotating shaft is a damping rotating shaft.
Furthermore, the pressure sensor is connected with a PLC controller through a lead, and the PLC controller is connected with a display through a lead.
The bone screw has the advantages that the structure is reasonable in design, a doctor can simulate the connecting position of the steel plate and the bone screw according to specific details of CT shooting, preliminary simulation is conducted on the stress condition of the bone screw, the steel plate and the bone screw are fixed more accurately and reasonably, pain feeling of a patient after the bone screw is connected with the steel plate is reduced, the fracture part is guided and fixed accurately, and healing and rehabilitation of the subsequent fracture part are facilitated.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged schematic view of the present invention.
Fig. 3 is an electrical schematic of the present invention.
In the figure, 1, a fixing piece; 2. a guide portion; 3. a simulation unit; 4. a steel plate; 5. bone-knitting nails; 6. a pressure sensor; 7. a drive bevel gear; 8. a rotating shaft; 9. a driven bevel gear; 10. a threaded rod; 11. a sleeve; 12. a limiting part; 13. a connecting frame; 14. a support; 15. a rotating part; 16. a lead screw slider mechanism; 17. a double-shaft extension asynchronous motor; 18. a guide wheel; 19. and a baffle plate.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
In addition, in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1-3, the strength simulation test device of the bone screw comprises a fixing device, a displacement device and an acting force feedback device, wherein the fixing device comprises two fixing parts 1 which are symmetrically arranged, the fixing parts 1 are provided with fixing planes which are arranged in parallel, the fixing parts 1 are connected with a driving mechanism, so that the two fixing parts 1 are close to or far away from each other along a straight line to clamp a fixed guide part 2, the guide part 2 is provided with a fixing plane which corresponds to the fixing parts 1, the guide part 2 is connected with a simulation part 3, and the simulation part 3 is suitable for simulating human bones; the displacement device is connected with the fixing device to enable the fixing device to move along the axial direction of the simulation part 3; the fixing devices and the displacement devices are provided with two groups which correspond to each other, the two fixing devices are used for clamping the two guide parts 2 and the two simulation parts 3 respectively, the two simulation parts 3 are arranged correspondingly to each other, the two simulation parts 3 are connected with the bone screw 5 through the steel plate 4, the bone screw 5 is connected in the simulation part 3 through the steel plate 4, and the simulation part 3 and the guide part 2 move along the axial direction of the fixing part 1 after being subjected to axial acting force; the acting force feedback device comprises pressure sensors 6 arranged inside the two fixing pieces 1, the pressure sensors 6 are arranged in the axial direction corresponding to the guide part 2 and are suitable for detecting a first acting force generated after the guide part 2 moves in the axial direction, and the first acting force and a second acting force received by the bone screw 5 at the same time are in positive correlation. When in use, a doctor can simulate the connecting position of the steel plate 4 and the bone nail 5 according to the specific details of CT shooting, the two simulation parts 3 correspond to human bones with broken bones, the doctor carries out a plurality of times of simulation connection on a plurality of connection modes of the bone nail 5 after general analysis through the simulation parts 3, then drives the two simulation parts 3 to relatively displace through a displacement device, simulates the bone growth state, the stress condition of the bone nail 5 can be preliminarily simulated through the pressure value fed back by the pressure sensor 6, after a plurality of times of connection simulation experiments, the condition that the pressure value fed back by the pressure sensor 6 is minimum is selected, the stress at the position of the bone nail 5 can be generally stated to be minimum, namely the stress of the simulation part 3, namely the human bones is minimum, so as to explain the best connection mode of the steel plate 4 and the bone nail 5, the fixation of the steel plate 4 and the bone nail 5 is more accurate and reasonable, and the pain brought to a patient after the bone nail 5 and the steel plate 4 are, the fracture part is accurately guided and fixed, and the healing and the rehabilitation of the subsequent fracture part are facilitated.
In a preferred embodiment, the driving mechanism comprises a driving bevel gear 7, the driving bevel gear 7 is connected with a rotating shaft 8, the driving bevel gear 7 is meshed with two driven bevel gears 9, the two driven bevel gears 9 are respectively connected with two threaded rods 10, the threaded rods 10 are in threaded fit with sleeves 11, the sleeves 11 are connected with the fixing part 1, limiting parts 12 arranged along the axial direction of the sleeves 11 are arranged outside the sleeves 11, the limiting parts 12 are connected with a connecting frame 13, the connecting frame 13 is connected with a support 14, and the support 14 is connected with a displacement device; the stopper portion 12 is adapted to restrict the sleeve 11 from rotating in the circumferential direction thereof, so that the sleeve 11 is displaced only in the axial direction by rotation of the threaded rod 10.
In a preferred embodiment, the outer wall of the sleeve 11 is provided with a plane surface which is matched with the limiting part 12, and the outer wall of the sleeve 11 is provided with a prismatic structure.
In the preferred embodiment, the shaft 8 is hinged at one end to the link frame 13 and at the other end to the swivel portion 15 through the bracket 14. The rotating part 15 can be selected for use, and the convenience is brought to the handheld rotation of experimenters.
In the preferred embodiment, the displacement device is a screw-slider mechanism 16, the support 14 is connected to the sliders of the screw-slider mechanism 16, and the screws of the two screw-slider mechanisms 16 are connected to a double-shaft asynchronous motor 17, so that the sliders of the two screw-slider mechanisms 16 move synchronously toward or away from each other. The design of the double-shaft extension asynchronous motor 17 enables the two screw rod sliding block mechanisms 16 to synchronously rotate, and the control is more convenient and flexible.
In a preferred embodiment, the opposite plane of the fixing element 1 is provided with a plurality of guide wheels 18, the guide wheels 18 being arranged in the axial direction of the simulation 3. The guide wheel 18 is arranged to enable the guide part 2 to move better in the axial direction without affecting the radial restriction of the guide part 2 by the fixing member.
In a preferred embodiment, the pressure sensor 6 is connected to the connecting frame 13, and the pressure sensor 6 is provided in plurality at intervals. A plurality of pressure sensor 6 arrange the terminal surface position at guide part 2, can detect a plurality of pressure values at the same time, calculate the average value that obtains a plurality of pressure values, as the pressure value that the guide part received in the experiment, and more scientific and accurate detects the contrast result more accurately, avoids appearing the error.
In the preferred embodiment, the fixing member 1 is provided with a blocking plate 19 at one side, and the two blocking plates 19 of the two fixing members 1 of the same fixing device are arranged in a staggered manner to fix the guide part 2. The baffle plate 19 added at the position of the fixing part 1 can strengthen the fixation of the guide part 2, and is firmer.
In a preferred embodiment, the shaft 8 is provided as a damped shaft. Can avoid pivot 8 to take place the rotation, mutually support through damping pivot structure and bevel gear structure, can ensure the position of mounting, pin the guide part in the mounting.
In the preferred embodiment, the pressure sensor 6 is connected via wires to a PLC controller, which is connected via wires to a display. The pressure value that can be convenient fast through the display reads pressure sensor 6 and detects, and then the record selects the pressure value minimum condition after many times of experiments.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (10)
1. Strength simulation testing arrangement of bone-knitting nail, its characterized in that includes:
the fixing device comprises two fixing parts which are symmetrically arranged, the fixing parts are provided with fixing planes which are arranged in parallel, the fixing parts are connected with a driving mechanism, so that the two fixing parts are close to or far away from each other along a straight line to clamp and fix a guide part, the guide part is provided with the fixing planes which correspond to the fixing parts, the guide part is connected with a simulation part, and the simulation part is suitable for simulating human bones;
the displacement device is connected with the fixing device and enables the fixing device to move along the axial direction of the simulation part;
the fixing devices and the displacement devices are provided with two groups which correspond to each other, the two fixing devices are used for clamping the two guide parts and the two simulation parts respectively, the two simulation parts are arranged corresponding to each other, the two simulation parts are connected through a steel plate and a bone screw, the bone screw penetrates through the steel plate and is connected in the simulation parts, and the simulation parts and the guide parts move along the axial direction of the fixing piece after being subjected to axial acting force;
effort feedback device, effort feedback device is including setting up the pressure sensor inside two mountings, pressure sensor corresponds the axial setting of guide part, is suitable for the first effort that produces after detecting the guide part along axial displacement, the second effort that first effort and bone fracture nail received simultaneously is positive correlation.
2. The strength simulation test device for the bone screw according to claim 1, wherein the driving mechanism comprises a driving bevel gear, the driving bevel gear is connected with a rotating shaft, the driving bevel gear is meshed with two driven bevel gears, the two driven bevel gears are respectively connected with two threaded rods, the threaded rods are in threaded fit with sleeves, the sleeves are connected with a fixing part, a limiting part is arranged outside the sleeves along the axial direction of the sleeves, the limiting part is connected with a connecting frame, the connecting frame is connected with a support, and the support is connected with a displacement device; the limiting part is suitable for limiting the sleeve to rotate along the circumferential direction of the sleeve, so that the sleeve only displaces along the axial direction when the threaded rod rotates.
3. The strength simulation test device of the bone screw according to claim 2, wherein the outer wall of the sleeve is provided with a plane matched with the limiting part, and the outer wall of the sleeve is provided with a prismatic structure.
4. A strength simulation test device for an bone screw according to claim 2 or 3, wherein one end of the rotary shaft is hinged to the connecting frame, and the other end thereof is connected to the rotary part through the frame.
5. The strength simulation test device for the bone screw according to claim 2, wherein the displacement device is a screw-slider mechanism, the bracket is connected with the slider of the screw-slider mechanism, and the screws of the two screw-slider mechanisms are connected with a double-shaft asynchronous motor, so that the sliders of the two screw-slider mechanisms synchronously move towards or towards each other.
6. A strength simulation test device for bone screw according to claim 1, characterized in that the opposite planes of the fixing member are provided with a plurality of guide wheels, and the guide wheels are arranged along the axial direction of the simulation part.
7. The strength simulation test device of the bone nail according to claim 2, wherein the pressure sensor is connected with the connecting frame, and the pressure sensors are spaced in plurality.
8. The strength simulation test device for bone screw according to claim 1, wherein the fixing member is provided with a blocking plate at one side, and the blocking plates of the two fixing members of the same fixing device are staggered and arranged correspondingly to each other to fix the guiding portion.
9. A strength simulation test device of an bone screw according to claim 4, characterized in that the rotation shaft is provided as a damping rotation shaft.
10. A strength simulation test device for an bone screw according to claim 1 or 7, wherein the pressure sensor is connected with a PLC controller through a lead, and the PLC controller is connected with a display through a lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910573746.4A CN110186765B (en) | 2019-06-28 | 2019-06-28 | Strength simulation testing device of bone-knitting nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910573746.4A CN110186765B (en) | 2019-06-28 | 2019-06-28 | Strength simulation testing device of bone-knitting nail |
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| Publication Number | Publication Date |
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| CN110186765A CN110186765A (en) | 2019-08-30 |
| CN110186765B true CN110186765B (en) | 2020-04-17 |
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| CN201910573746.4A Active CN110186765B (en) | 2019-06-28 | 2019-06-28 | Strength simulation testing device of bone-knitting nail |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2290616B (en) * | 1994-06-20 | 1998-06-24 | James Bruce Richardson | System for measuring stiffness of a fractured bone |
| JP4805716B2 (en) * | 2006-04-18 | 2011-11-02 | 財団法人電力中央研究所 | Small material testing equipment |
| JP6741271B2 (en) * | 2016-10-06 | 2020-08-19 | 東京瓦斯株式会社 | Material testing device and material testing method |
| CN208239195U (en) * | 2018-06-13 | 2018-12-14 | 天津医科大学总医院 | For whole bone and the three-point bending fixture of bionic scaffold material Mechanics Performance Testing |
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