CN111442870A - Bone screw pulling and twisting tester - Google Patents
Bone screw pulling and twisting tester Download PDFInfo
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- CN111442870A CN111442870A CN202010346510.XA CN202010346510A CN111442870A CN 111442870 A CN111442870 A CN 111442870A CN 202010346510 A CN202010346510 A CN 202010346510A CN 111442870 A CN111442870 A CN 111442870A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0033—Force sensors associated with force applying means applying a pulling force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0042—Force sensors associated with force applying means applying a torque
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A bone screw tension and torsion testing machine comprises a base, a lifting component fixedly arranged on the base, a screw clamp, a torsion component driving the screw clamp to rotate, a sample clamp and a detection component; the screw clamp is connected to the torsion assembly, the torsion assembly is installed on the lifting assembly and driven by the lifting assembly to reciprocate, the sample clamp and the screw clamp are arranged oppositely, the sample clamp is installed on the detection assembly, and the detection assembly is installed on the base; the screw clamp is a chuck clamp for clamping the bone screw to carry out self-tapping and rotating, or a nail sleeve clamp for clamping the bone screw to carry out pulling out; the screw clamp is detachably connected with the torsion assembly. The tester can conveniently measure parameters such as the rotating torque of the bone screw, the axial tension when the bone screw is pulled out, the self-tapping axial pressure and the like, solves the problem that the tester in the prior art can not measure various physical properties of the bone screw, and has strong applicability for multiple purposes.
Description
Technical Field
The invention belongs to the technical field of testing machines, and relates to a bone screw tension and torsion testing machine.
Background
The bone screw belongs to the orthopedic implant and is widely applied to the clinical treatment of dislocation, fracture and other diseases. The bone screw provides a means for surgeons to perform bone fixation, and when the bone screw is implanted into a human body, in addition to bearing working load, whether the bone screw can be firmly fixed at a broken bone is one of important properties of the bone screw for healing.
The state has strict regulations on bone screws, including appearance size, service performance, physical and chemical properties, hygienic indexes and the like. The quality of the bone screw determines the operation convenience of doctors and the use safety of patients, the bone screw physical property testing machine can simulate clinical use conditions, measure parameters such as the rotating torque of the bone screw, the axial tension when the bone screw is pulled out, the axial pressure of self-tapping and the like, and automatically obtain a test result.
At present, instruments for testing the screwing torque, the self-tapping force and the like of the bone screw in China cannot realize automatic measurement, the measurement result has larger error, the performance of the bone screw cannot be accurately reflected, and equipment capable of testing the usability, particularly the physical performance of the bone screw is needed.
Disclosure of Invention
The invention aims to provide a bone screw tension-torsion testing machine which can conveniently measure parameters such as the rotating torque of a butt joint bone screw, the axial tension when the butt joint bone screw is pulled out, the self-tapping axial pressure and the like, improve the fixing effect of the butt joint bone screw and a test sample, ensure the accuracy of the testing effect and improve the usability.
The invention is realized by the following technical scheme.
The invention relates to a bone screw tension and torsion testing machine, which comprises a base, a lifting component fixedly arranged on the base, a screw clamp, a torsion component driving the screw clamp to rotate, a sample clamp and a detection component, wherein the lifting component is fixedly arranged on the base;
the screw clamp is connected to the torsion assembly, the torsion assembly is installed on the lifting assembly and driven by the lifting assembly to reciprocate, the sample clamp and the screw clamp are arranged oppositely, the sample clamp is installed on the detection assembly, and the detection assembly is installed on the base;
the screw clamp is a chuck clamp for clamping the bone screw to carry out self-tapping and rotating, or a nail sleeve clamp for clamping the bone screw to carry out pulling out; the screw clamp is detachably connected with the torsion assembly.
In an example of this technical scheme, chuck anchor clamps include three-jaw chuck, chuck keysets and chuck joint, and three-jaw chuck is connected with the chuck keysets, and the chuck keysets is connected with chuck articulate, and chuck joint and torsion unit can dismantle the mode and be connected. The three-jaw chuck can clamp a drill bit and a bone screw driver head to measure parameters such as the rotating torque of a bone screw, the axial pressure of self-tapping and the like.
In an example of the technical scheme, the nail sleeve clamp comprises a nail sleeve, a clamp sleeve and a joint, wherein a bayonet used for clamping a cap portion of a bone screw is arranged on the nail sleeve, the nail sleeve is coaxially arranged inside the clamp sleeve and can rotate, an operation hole used for conveniently operating the nail sleeve to rotate is arranged on the side portion of the clamp sleeve, the clamp sleeve is connected with the joint, and the joint and the torsion assembly are detachably connected. The sleeve can be used as the cap of bone screw, the bone screw is pulled out from the sample, and the parameters such as axial tension and the like are measured when the bone screw is pulled out
In an example of this technical scheme, the subassembly that twists reverse includes motor, speed reducer, frame and rotating main shaft, and the frame is installed on lifting unit and is reciprocating motion under lifting unit's drive, and the speed reducer is installed on the frame, and the motor is installed on the speed reducer, and rotating main shaft sets up at the frame internal rotation and is connected with the motor through the speed reducer, and the motor drives rotating main shaft and rotates, and rotating main shaft's lower extreme and chuck joint or articulate.
In one example of the technical scheme, a sleeve hole is formed in the lower end face of the rotating main shaft, a pin hole penetrating through the sleeve hole is formed in the side portion of the rotating main shaft, the chuck joint or the joint is provided with a connecting portion, the connecting portion is provided with a joint pin hole matched with the pin hole, the connecting portion is inserted into the sleeve hole, and pins are inserted into the pin hole and the joint pin hole to achieve connection. Through the connected mode of pin, conveniently dismantle and install different screw anchor clamps to the adaptation carries out various tests.
In one example of the technical scheme, the lifting assembly comprises a top plate, a guide rod, a screw rod and a lifting plate;
the guide rod and the screw rod are connected between the top plate and the base, the lifting plate is sleeved on the guide rod and the screw rod and matched with the screw rod, the lifting plate is driven to reciprocate along the guide rod through the rotation of the screw rod, and the torsion assembly is installed on the lifting plate.
In an example of this technical scheme, still including elevator motor, elevator motor installs in the base for drive the lead screw and rotate.
In one example of the technical scheme, the sample clamp comprises a first clamp seat, a left adjusting clamping block and a right adjusting clamping block, wherein the left adjusting clamping block and the right adjusting clamping block are both arranged on the clamp seat and can move relative to the clamp seat to adjust a space between the left adjusting clamping block and the right adjusting clamping block for clamping a sample, and the clamp seat is arranged on the detection assembly; the sample clamp can be used for clamping a sample when parameters such as the screwing torque of the bone screw, the self-tapping axial pressure and the like are measured.
Or, the sample anchor clamps include second anchor clamps seat, left side regulation briquetting and left side regulation briquetting, and left side regulation clamp splice and right side regulation clamp splice are all installed on the anchor clamps seat to can move in order to compress tightly the both ends at the sample for the anchor clamps seat, the anchor clamps seat is installed on detecting element. The sample clamp can be used for pressing the sample when parameters such as axial tension and the like during pulling out are measured.
In an example of the technical scheme, the detection component is a tension-torsion composite sensor.
In an example of this technical scheme, still including spacing subassembly, spacing subassembly includes with twist reverse the synchronous reciprocating motion's of subassembly baffle, gag lever post, install spacing collar on the gag lever post, spacing support and limiting plate, the gag lever post passes through spring swing joint on spacing support, the lower extreme of gag lever post is connected with the limiting plate, spacing support mounting is on the base, baffle and gag lever post cooperation, the baffle makes the gag lever post move along the guide arm direction through promoting the gag lever post to carry on spacingly through the limiting plate.
The invention has the advantages that the parameters such as the rotating torque of the bone screw, the axial tension when the bone screw is pulled out, the self-tapping axial pressure and the like can be conveniently measured, the problem that the tester in the prior art can not measure various physical properties of the bone screw is solved, and the invention has strong applicability for multiple purposes.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and the drawings in the following description are only directed to some embodiments, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a bone screw tension and torsion testing machine in an embodiment.
Fig. 2 is an exploded view of the bone screw tension tester in the embodiment.
Fig. 3 is an exploded view of the torsion assembly and screw clamp of an embodiment.
Fig. 4 is an exploded view of the structure of one example of the screw clamp in the embodiment.
Fig. 5 is an exploded view of the structure of one example of the sample holder in the embodiment.
Fig. 6 is a partial structural view of the position restricting assembly in the embodiment.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and 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 considered as limiting the present invention.
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 invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; 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 by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In addition, technical solutions between various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the scope of the disclosure of the present invention.
In the following description, suffixes such as "module", "part", "assembly", or "unit" are used only for convenience of description of the present invention, and have no specific meaning by themselves, and thus may be used mixedly.
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
As shown in fig. 1-2, the present embodiment is a bone screw tension and torsion testing machine, which comprises a base 10, a lifting assembly 20, a torsion assembly 30, a screw clamp 40, a sample clamp 50 and a detection assembly 60; twist reverse subassembly, screw anchor clamps, sample anchor clamps and determine module all lie in lifting unit's same one side, screw anchor clamps and the relative setting of the vertical direction of sample anchor clamps, lifting unit installs on the base, it installs on lifting unit to twist reverse the subassembly, screw anchor clamps detachable connects the lower extreme at twist reverse subassembly 30, twist reverse subassembly and screw assembly and be reciprocating motion along vertical direction under lifting unit's drive, the sample anchor clamps are connected in determine module's upper end, determine module's lower extreme is connected on the base.
The screw clamp 40 is used for clamping a bone screw and twisting the bone screw into a sample in a self-tapping mode or pulling the bone screw out of the sample, the sample clamp 50 is used for clamping or pressing the sample, when the bone screw is twisted into or pulled out of the sample, the bone screw pulling and twisting test machine can realize automatic control by measuring axial pressure and torque during twisting and axial tension during pulling out through the detection assembly so as to control the operation of the lifting assembly and the twisting assembly.
The base 10 is of a box structure and comprises an upper plate 11, a lower plate 12, a plurality of upright posts 13 connected between the upper plate and the lower plate, and a coaming 14; the inside of base is provided with control system for control lifting unit and torsion subassembly to and be used for handling the measured data who comes from detecting element, give the test result, still can be provided with the operation button on the bounding wall of base generally and be used for showing the display screen of test result.
Lifting unit includes roof 21, guide arm 22, lead screw 23, lifter plate 24 and elevator motor 25, guide arm 22 has two, guide arm 22 and lead screw 23 are all connected between roof 21 and base, lead screw and roof, the upper plate of base all is connected with the bearing through bearing frame 231, make the lead screw rotate under the support of roof and upper plate, 24 covers of lifter plate are established on guide arm and lead screw, be equipped with screw-nut 241 on the lifter plate 24 and be used for cooperating with lead screw 23, rotation through the lead screw drives the lifter plate along guide arm 22 reciprocating motion, elevator motor 25 installs in the inside of base, be used for driving the lead screw and rotate, the transmission mode and the lead screw linkage of gear or belt can cross. The guide rod improves the stability of the lifting plate in the ascending and descending processes, and simultaneously plays a role in connecting the top plate with the upper plate.
As shown in fig. 3, the torsion assembly includes a motor 31, a speed reducer 32, a base 33 and a rotating spindle 34, the base 33 is mounted on the lifting plate 24 of the lifting assembly and driven by the lifting assembly to reciprocate, the speed reducer 32 is mounted on the base, the motor 31 is mounted on the speed reducer, the rotating spindle 34 is arranged in the base 33 to rotate and connected with the motor 31 through the speed reducer 32, the motor drives the rotating spindle to rotate, and the lower end of the rotating spindle is detachably connected with the screw clamp.
As shown in fig. 3, the screw clamp may be replaced with a different clamp according to the difference of the measured properties, and as an example, the screw clamp is a chuck clamp 41 for clamping a bone screw for self-tapping and screwing, and the chuck clamp includes a three-jaw chuck 411, a chuck adapter plate 412, and a chuck joint 413, the three-jaw chuck being connected to the chuck adapter plate, the chuck adapter plate being connected to the chuck joint, and the chuck joint and the torsion assembly being detachably connected.
The three claws of the three-claw chuck can clamp a drill bit, a bone screw driver head, a bone screw and the like, can measure the axial pressure required by screwing the metal bone screw with self-tapping performance into a sample, can measure the torque required by screwing the metal bone screw into and out of the sample, and can measure the maximum fracture torque and the fracture torsion angle of the metal bone screw.
As another example, as shown in fig. 4, the screw clamp is a nail sleeve clamp 42 for clamping a bone screw for extraction, the nail sleeve clamp includes a nail sleeve 421, a clamp sleeve 422 and a joint 423, the nail sleeve is provided with a bayonet 4211 for clamping a cap portion of the bone screw, the nail sleeve is coaxially arranged inside the clamp sleeve and can rotate, the side portion of the clamp sleeve 422 is provided with an operation hole 4221 for conveniently operating the nail sleeve to rotate, the clamp sleeve is connected with the joint, and the joint and the torsion assembly are detachably connected.
The cap of the bone screw may be clamped by the sleeve 421 and the axial tension required to pull or fail the bone screw from the sample may be measured.
Specifically, a sleeve hole is formed in the lower end face of the rotating main shaft 34, a pin hole 342 penetrating through the sleeve hole is formed in the side portion of the rotating main shaft, the chuck joint or the joint is provided with a connecting portion 401, the connecting portion is provided with a joint pin hole 402 matched with the pin hole, the connecting portion is inserted into the sleeve hole, a pin 343 is inserted into the pin hole and the joint pin hole to achieve connection, and then the locking nuts 414 and 424 are used for reinforcing and fixing.
As shown in fig. 2, as an example of the sample holder, the sample holder includes a first holder base 511, a left adjusting block 512, and a right adjusting block 513, each of which is mounted on the holder base and is movable relative to the holder base to adjust a space between the left and right adjusting blocks for clamping the sample, the holder base being mounted on the detecting assembly;
as another example of the sample holder, as shown in fig. 5, the sample holder includes a second holder base 521, a left adjusting press 522 and a left adjusting press 523, both of which are mounted on the holder base and are movable relative to the holder base to press against both ends of the sample, the holder base being mounted on the detection assembly.
The sensing assembly 60 is a tension-torsion composite sensor. The tension-torsion composite sensor is a composite sensor capable of detecting tension, pressure, torque and torsion angle.
As shown in fig. 2 and fig. 6, in order to limit the ascending and descending of the lifting plate, the lifting plate further comprises a limiting component, the limiting component comprises a baffle 71 which synchronously reciprocates with the torsion component, a limiting rod 72, a limiting ring 73 installed on the limiting rod, a limiting bracket 74 and a limiting plate 75, the limiting rod is movably connected onto the limiting bracket through a spring 76, the lower end of the limiting rod is connected with the limiting plate 75, the limiting bracket is located inside the base and fixed on the lower plate, the baffle is matched with the limiting rod, the baffle 71 enables the limiting rod to move along the direction of the guide rod by pushing the limiting ring, and the limiting plate is used for limiting.
The bone screw pulling and twisting tester of the embodiment is further provided with a protective cover 81 made of aluminum alloy, a dustproof curtain 82 and a top cover 83 positioned above the top plate outside the lifting assembly for the purposes of operation safety and dust prevention. Each experiment of the bone screw pulling and twisting test machine meets the experiment requirements in national standards of YYT1504-2016, YYT1505-2016, YYT1506-2016 and 0662-. The motor and the lifting of the fixture all use the precise servo motor, the experimental precision of the fixture can be guaranteed, the replacement operation between the fixture tools is simple and convenient, reliable clamping can be provided, and the shaking of experimental errors caused by the fixture tools is prevented.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like, mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily 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.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. It will be apparent to those skilled in the art that a number of simple derivations or substitutions can be made without departing from the inventive concept.
Claims (10)
1. A bone screw pulling and twisting tester, which is characterized in that,
the device comprises a base, a lifting assembly fixedly arranged on the base, a screw clamp, a torsion assembly driving the screw clamp to rotate, a sample clamp and a detection assembly;
the screw clamp is connected to the torsion assembly, the torsion assembly is installed on the lifting assembly and driven by the lifting assembly to reciprocate, the sample clamp and the screw clamp are arranged oppositely, the sample clamp is installed on the detection assembly, and the detection assembly is installed on the base;
the screw clamp is a chuck clamp for clamping the bone screw to carry out self-tapping and rotating, or a nail sleeve clamp for clamping the bone screw to carry out pulling out; the screw clamp is detachably connected with the torsion assembly.
2. The bone screw pull-twist test machine according to claim 1,
the chuck clamp comprises a three-jaw chuck, a chuck adapter plate and a chuck joint, the three-jaw chuck is connected with the chuck adapter plate, the chuck adapter plate is connected with the chuck joint, and the chuck joint and the torsion assembly can be detachably connected.
3. The bone screw pull-twist test machine according to claim 1,
nail cover anchor clamps include nail cover, anchor clamps cover and joint, are equipped with the bayonet socket that is used for the cap portion of joint bone screw on the nail cover, and nail cover coaxial setting is in anchor clamps cover's inside and can rotate, and anchor clamps cover's lateral part is equipped with and is used for conveniently operating nail cover pivoted handle hole, and anchor clamps cover and articulate, connect and twist reverse the subassembly detachable mode and connect.
4. The bone screw pull-twist test machine according to claim 2 or 3,
the torsion assembly comprises a motor, a speed reducer, a base and a rotating main shaft, the base is installed on the lifting assembly and driven by the lifting assembly to reciprocate, the speed reducer is installed on the base, the motor is installed on the speed reducer, the rotating main shaft is arranged in the base to rotate and connected with the motor through the speed reducer, the motor drives the rotating main shaft to rotate, and the lower end of the rotating main shaft is connected with a chuck joint or a joint.
5. The bone screw pull-twist test machine according to claim 4,
the lower end face of the rotating main shaft is provided with a sleeve hole, a pin hole penetrating through the sleeve hole is formed in the side portion of the rotating main shaft, the chuck joint or the joint is provided with a connecting portion, the connecting portion is provided with a joint pin hole matched with the pin hole, the connecting portion is inserted into the sleeve hole, and pins are inserted into the pin hole and the joint pin hole to achieve connection.
6. The bone screw pull-twist test machine according to claim 1,
the lifting assembly comprises a top plate, a guide rod, a screw rod and a lifting plate;
the guide rod and the screw rod are connected between the top plate and the base, the lifting plate is sleeved on the guide rod and the screw rod and matched with the screw rod, the lifting plate is driven to reciprocate along the guide rod through the rotation of the screw rod, and the torsion assembly is installed on the lifting plate.
7. The bone screw pull-twist tester of claim 6,
still including elevator motor, elevator motor installs in the base for drive the lead screw and rotate.
8. The bone screw pull-twist test machine according to claim 1,
the sample clamp comprises a first clamp seat, a left adjusting clamping block and a right adjusting clamping block, the left adjusting clamping block and the right adjusting clamping block are both arranged on the clamp seat and can move relative to the clamp seat to adjust a space between the left adjusting clamping block and the right adjusting clamping block for clamping a sample, and the clamp seat is arranged on the detection assembly;
or, the sample anchor clamps include second anchor clamps seat, left side regulation briquetting and left side regulation briquetting, and left side regulation clamp splice and right side regulation clamp splice are all installed on the anchor clamps seat to can move in order to compress tightly the both ends at the sample for the anchor clamps seat, the anchor clamps seat is installed on detecting element.
9. The bone screw pull-twist tester according to claim 1, wherein the detection component is a pull-twist composite sensor.
10. The bone screw pull-twist test machine according to claim 1,
still including spacing subassembly, spacing subassembly includes the baffle with twist reverse the synchronous reciprocating motion of subassembly, the gag lever post, install spacing collar, spacing support and the limiting plate on the gag lever post, and the gag lever post passes through spring swing joint on spacing support, and the lower extreme of gag lever post is connected with the limiting plate, and spacing support mounting is on the base, baffle and gag lever post cooperation, and the baffle makes the gag lever post move along the guide arm direction through promoting the gag lever post to carry on spacingly through the limiting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010346510.XA CN111442870A (en) | 2020-04-27 | 2020-04-27 | Bone screw pulling and twisting tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010346510.XA CN111442870A (en) | 2020-04-27 | 2020-04-27 | Bone screw pulling and twisting tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111442870A true CN111442870A (en) | 2020-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010346510.XA Pending CN111442870A (en) | 2020-04-27 | 2020-04-27 | Bone screw pulling and twisting tester |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113624592A (en) * | 2021-09-08 | 2021-11-09 | 中国建材检验认证集团西安有限公司 | Multifunctional fatigue performance detection device |
| CN113720541A (en) * | 2021-08-17 | 2021-11-30 | 济南恒瑞金试验机有限公司 | Self-tapping performance double-position testing machine for pressing and pulling force, rotating torque and self-tapping performance of medical bone screw |
| CN114485753A (en) * | 2022-02-11 | 2022-05-13 | 浙江数衍数据科技有限公司 | Detection equipment for computer heat dissipation motor spindle |
| CN113720541B (en) * | 2021-08-17 | 2024-07-05 | 济南恒瑞金试验机有限公司 | Medical bone screw press-pull force rotating torque self-tapping performance double-position testing machine |
-
2020
- 2020-04-27 CN CN202010346510.XA patent/CN111442870A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720541A (en) * | 2021-08-17 | 2021-11-30 | 济南恒瑞金试验机有限公司 | Self-tapping performance double-position testing machine for pressing and pulling force, rotating torque and self-tapping performance of medical bone screw |
| CN113720541B (en) * | 2021-08-17 | 2024-07-05 | 济南恒瑞金试验机有限公司 | Medical bone screw press-pull force rotating torque self-tapping performance double-position testing machine |
| CN113624592A (en) * | 2021-09-08 | 2021-11-09 | 中国建材检验认证集团西安有限公司 | Multifunctional fatigue performance detection device |
| CN114485753A (en) * | 2022-02-11 | 2022-05-13 | 浙江数衍数据科技有限公司 | Detection equipment for computer heat dissipation motor spindle |
| CN114485753B (en) * | 2022-02-11 | 2024-05-17 | 北京神州数码云科信息技术有限公司 | Detection equipment for main shaft of computer heat dissipation motor |
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