CN207923636U - Parallel artificial tooth frictional testing machine - Google Patents
Parallel artificial tooth frictional testing machine Download PDFInfo
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- CN207923636U CN207923636U CN201820118949.5U CN201820118949U CN207923636U CN 207923636 U CN207923636 U CN 207923636U CN 201820118949 U CN201820118949 U CN 201820118949U CN 207923636 U CN207923636 U CN 207923636U
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- artificial tooth
- parallel
- saliva
- testing machine
- frictional testing
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Abstract
The utility model discloses a kind of parallel artificial tooth frictional testing machines, belong to friction and wear test field, to solve the problems, such as that complicated oral cavity tooth crowding and oral environment cannot be simulated for current artificial tooth friction wear testing machine.Its structure includes experiment body, multiple freedom parallel mechanism, electric cylinder, saliva recover and saliva nozzle, force snesor and acceleration transducer, artificial tooth fixture, display and control unit.By multiple freedom parallel mechanism, the fricting movement of progress chewing simulating between two samples is driven, and acceleration, force signal and data processing are acquired by sensor and export the data such as friction coefficient, sliding speed.
Description
Technical field
The invention belongs to one kind to simulate between true mouth motion progress artificial tooth and natural teeth, artificial tooth and artificial tooth
Friction and wear test device, especially a kind of space six degree of freedom oral cavity masticatory movement simulate friction wear testing machine.
Background technology
As the improvement of people's living standards, no matter the requirement from wearability or aesthetic to artificial tooth increasingly comes
It is high.If repair materials differ larger with Natural tooth Enamel polishing machine, for example abrasiveness is better than Natural tooth Enamel, can cause day
Right enamel excessive loss, natural teeth is seriously worn can be to dental hard tissue, periodontium, stomatognathic system musculature and temporo
Jaw joint causes to damage, and can clinically show as hypersensitive dentin, pulpitis, periodontal disease, food impaction or even temporo jaw and close
It is derangement syndrome；If abrasiveness is less than Natural tooth Enamel, and dummy can be made to wear in a short time excessively, occlusion work(is lost
Energy.Ideal repair materials should have and abrasiveness similar in natural teeth.Therefore domestic and foreign scholars are with regard to justice under complicated oral environment
The abrasion of tooth expands further investigation.
Domestic and foreign scholars are based primarily upon assessment and in-vitro simulated wear test in vivo to the research of the wearability of artificial tooth at present.
The former is by patient's observing oral cavity and clinical experience, or measures and analyze the polishing machine of artificial tooth indirectly.But itself has
Serious limitation, for example the period is long, the controlling of experiment is poor, there are many uncontrollable factor in experiment, and lack and repeat experiment
It may.Therefore it needs a kind of frictional testing machine to evaluate clinically common different materials, finds frictional behaviour closest to natural teeth
The repair materials of enamel provide correlation theory foundation for its clinic.
Foreign countries have numerous experts and technical staff carries out the design of external mandibular movement model prototype.Foreign study
Hanau jaws frame can simulate mandibular movement completely, and simulate the movement locus of tooth crowding relatively practical mandibular.
Hanau jaws frame fixes maxilla and mandible model by the annular ring and fastener screws on top, and side is adjusted with lateral column
Condyle negative taper realizes the fortune of simulation human oral cavity lower jaw with this to switch to that disk, incisal guide be recessed and incisal guidance pin adjusts incisal guidance inclination
It is dynamic.But Hanau jaw framves are mainly used for the research of human oral cavity physiology, clinically, most of to be determined according to clinical practice
Property analysis, such as record mandibular movement track be used for analyze experimental data.But it is few be used for carry out artificial tooth and natural teeth, justice
Fretting wear, testing fatigue between tooth and artificial tooth and life prediction, this product are transported mainly in real simulation oral cavity lower jaw
The test of fretting wear is carried out in the case of dynamic.
Domestic existing artificial tooth frictional testing machine is mainly made of frictional testing machine transformation, and forms of motion is predominantly straight
Line is reciprocating, needle-disc type, ball-disc type, sells disc type, although saliva moistening and the temperature environment in mouth can be simulated simply,
Cannot true Mouthsimulator mandibular movement and oral cavity complex environment.The oral environment simulation test machine of the designs such as Zheng Kan is sent out
The bright patent No.：201210306950.8 adjusted by temperature in liquid ejection unit in mouth jaw two-freedom moving cell, mouth, mouth it is single
Member and control unit composition realize the movement of mouth jaw two-freedom using eccentric wheel and retarder, and can Mouthsimulator temperature and
Saliva moistens, but its movement is more single, and the degree of automation is very low, can not simulate the movement of human oral cavity lower jaw well.
The tri-dimensional oral prosthesis in vitro grinding and repairing emulated testing machine patent of invention number of the designs such as Song Xiaofei：20061001368.1 can
To realize the movement of X-direction, Y-direction, Z-direction, although the invention cannot simulate human body mouth well there are three degree of freedom
The movement of chamber lower jaw, and do not account for the true complex environment of human oral cavity.
Invention content
It is carried out in the case of can be applicable to the true oral cavity mandibular movement of simulation the purpose of this utility model is to provide one kind
The parallel artificial tooth friction of fretting wear, testing fatigue and Lifetime Forecasting Test between artificial tooth and natural teeth, artificial tooth and artificial tooth
Testing machine.
To reach above-mentioned technical purpose, the technical solution of the utility model is：Parallel artificial tooth frictional testing machine, by
Experiment body, multiple freedom parallel mechanism, electric cylinder, saliva recover and saliva nozzle, force snesor and acceleration transducer,
Artificial tooth fixture, display and control unit are constituted.
According to the embodiments of the present invention, a kind of artificial tooth frictional testing machine in parallel is provided, including：
Body is tested, is vertical structure.
Multiple freedom parallel mechanism is mounted on body.
Electric cylinder is mounted on body upper.
Saliva recover and saliva nozzle are mounted on multiple freedom parallel mechanism moving platform.
Artificial tooth fixture is mounted on three-dimensional force transducer lower part and three-dimensional acceleration transducer top.
Three-dimensional force transducer is arranged in electric cylinder end.
Three-dimensional acceleration transducer is arranged on saliva recover.
The parallel artificial tooth frictional testing machine main drive gear is parallel institution.
The parallel institution has 6 degree of freedom, can simulate mandibular movement complicated when people's chewing.
The multiple freedom parallel mechanism is series parallel type multi-degree-of-freemechanical mechanical arm, and the series parallel type multi-degree-of-freemechanical mechanical arm is matched
It is set to：
Silent flatform, the lower surface horizontal of the silent flatform is on body.
Parallel kinematic unit equipped with multiple, and sets the top surface edge in silent flatform.
Moving platform, the tail end of connection collection parallel units.
Wherein, parallel units are containing the series connection for forming the parallel arm in parallel units there are one joint.
The electric cylinder can realize the linear motion of vertical direction, the position for adjusting upper fixture according to various sample.
Saliva recover is divided into two chambers, and a chamber is former saliva chamber, and another chamber is recycling saliva chamber.
The saliva nozzle uses conical nozzle, is connect with stoste chamber along conduit.
The artificial tooth fixture, it is characterised in that using the scroll chuck that hard rubber is housed on chuck jaw.
The utility model has following remarkable advantage compared with the domestic prior art：1, the high, service load using kinematic accuracy
It is high, reflection speed is fast, rigidity is high, is easily achieved the six-degree-of-freedom parallel connection mechanism of feedback control as main drive gear, can be more
True simulation tooth crowding；It 2, can Mouthsimulator true environment by saliva recover and saliva nozzle；3, control system
System has complete closed-loop system, by the feedback of sensor, can be accurately controlled input parameter and reach more true friction effect,
High degree of automation, it is easy to operation；4, fixture uses the form of triangle chuck stiffened rubber, replaces style artificial tooth conveniently, aid
It is firm.
The utility model is described in further detail below in conjunction with the accompanying drawings.
Description of the drawings
Fig. 1 is parallel artificial tooth frictional testing machine front view.
Fig. 2 is main transmission mechanism and saliva recover and saliva nozzle enlarged drawing.
Fig. 3 is saliva recover internal structure chart.
Fig. 4 is artificial tooth fixture three-dimensional model diagram.
Fig. 5 is that friction coefficient calculates schematic diagram.
Specific implementation mode
In conjunction with Fig. 1, the utility model is by experiment body 8, multiple freedom parallel mechanism 1, saliva recover and saliva nozzle
2, artificial tooth fixture 4,5, acceleration transducer 3 and force snesor 6, electric cylinder 7, display are constituted with control unit, it is described mostly from
It is connect respectively with display with control unit by degree parallel institution, saliva recover and saliva nozzle, and is installed in testing machine machine
In on body 8, multiple freedom parallel mechanism 1 is on body 8, simulates the movement of human mouth lower jaw, saliva recover and saliva spray
Head is located on the moving platform 13 of parallel institution 1；Three-dimensional acceleration transducer 3 is located on saliva recover 23；Lower fixture 4 is located at three
To on acceleration transducer 3；Can the electric cylinder 7 of vertical telescopic be connected with 8 upper plate of body；Three-dimensional force transducer 6 is located at electronic
Below cylinder 7；Fixture 5 is connect with three-dimensional force transducer 6.When testing machine works, control unit receives under experimenter's input
The equation of jaw movement locus, control system is counter to this equation to be solved, and obtains parallel institution steering engine rotational angle time function,
The steering engine angle that different moments are found out with this, then controls steering engine 14, and the emulation of track is just realized with this；Control system
System carries out saliva injection according to the saliva injection frequency that experimenter inputs.
As shown in Fig. 2, nozzle support frame 21 is fixed on 13 marginal position of moving platform by screw, micro hydraulic water pump is fixed on
Inside stoste case, nozzle 22 is fixed on supporting rack 21.
As shown in figure 3, the saliva recover 23 is by stoste case 231, micro hydraulic water pump 232, vertical centre pipe
233, saliva recycling bins 234 constitute spray circuits.Saliva recover 23 is fixed on by screw on the moving platform 13 of parallel institution 1.
When testing machine works, with fixture fixed denture and natural teeth, according to the saliva supply amount of input, by miniature hydraulic pump 232 from
It is pumped into saliva in stoste case 231, is sprayed by conical nozzle by water pipe, used liquid flows into saliva through hollow pipe 233 and returns
Receive case.
As shown in figure 4, artificial tooth fixture is made of chuck jaw 31, clamping apparatus disk 32, hard rubber 33.Clamping apparatus disk 32 passes through vertical blank
Stem and screw are fixed on three-dimensional acceleration transducer 3, and chuck jaw 31 is by being threadedly secured on clamping apparatus disk 32, hard rubber 33
It is fixed in the recess of 31 leading portion of chuck jaw.The fixture can clamping size differ, artificial tooth sample in irregular shape, and hard rubber
Structure ensures not only to consolidate but also sample can be protected not to be destroyed.
The solution of friction coefficient is as shown in figure 5, when artificial tooth frictional testing machine works, phase mutual friction between two artificial teeth,
Power along artificial tooth contact point speed of related movement direction is tangential forceF t, the power perpendicular to speed of related movement is normal forceF n,F n
It is with vertical direction angleθ.The power that three-dimensional force transducer measures three directions is respectivelyF X、F Y、F ZIt can be obtained by geometrical relationship：
(1)
(2)
WhereinFForF X、F YVector sum.
Then friction coefficient is：
(3)。
Claims (8)
1. a kind of parallel artificial tooth frictional testing machine, which is characterized in that including：
Body is tested, is vertical structure；
Multiple freedom parallel mechanism is mounted on body；
Electric cylinder is mounted on body upper；
Saliva recover and saliva nozzle are mounted on multiple freedom parallel mechanism moving platform；
Artificial tooth fixture is mounted on three-dimensional force transducer lower part and three-dimensional acceleration transducer top；
Three-dimensional force transducer is arranged in electric cylinder end；
Three-dimensional acceleration transducer is arranged on saliva recover；
Display screen is arranged in body right part.
2. parallel artificial tooth frictional testing machine according to claim 1, it is characterised in that testing machine main drive gear is simultaneously
Online structure.
3. artificial tooth frictional testing machine according to claim 2, which is characterized in that the parallel institution has 6 degree of freedom, can
Complicated mandibular movement when simulating people's chewing.
4. according to any parallel artificial tooth frictional testing machine of claim 1 ~ 3, which is characterized in that the multiple degrees of freedom is simultaneously
Online structure is series parallel type multi-degree-of-freemechanical mechanical arm, and the series parallel type multi-degree-of-freemechanical mechanical arm is configured to：
Silent flatform, and the lower surface horizontal of the silent flatform is on body；
Parallel kinematic unit equipped with multiple, and sets the top surface edge in silent flatform；
Moving platform, the tail end of connection collection parallel units；
Wherein, parallel units are containing the series connection for forming the parallel arm in parallel units there are one joint.
5. parallel artificial tooth frictional testing machine according to claim 1, which is characterized in that the electric cylinder can be realized vertically
The linear motion in direction, the position for adjusting upper fixture according to various sample.
6. parallel artificial tooth frictional testing machine according to claim 1, which is characterized in that the saliva recover is divided into two
Chamber, a chamber are former saliva chamber, and another chamber is recycling saliva chamber.
7. artificial tooth frictional testing machine according to claim 1, which is characterized in that the saliva nozzle uses tapered injection
Mouth is connect along conduit with stoste chamber.
8. parallel artificial tooth frictional testing machine according to claim 1, which is characterized in that the artificial tooth fixture, feature
It is using the scroll chuck that hard rubber is housed on chuck jaw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820118949.5U CN207923636U (en) | 2018-01-24 | 2018-01-24 | Parallel artificial tooth frictional testing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820118949.5U CN207923636U (en) | 2018-01-24 | 2018-01-24 | Parallel artificial tooth frictional testing machine |
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| CN207923636U true CN207923636U (en) | 2018-09-28 |
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| CN201820118949.5U Expired - Fee Related CN207923636U (en) | 2018-01-24 | 2018-01-24 | Parallel artificial tooth frictional testing machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072582A (en) * | 2018-01-24 | 2018-05-25 | 济南大学 | Parallel artificial tooth frictional testing machine and the method for testing friction abrasion |
| CN117347217A (en) * | 2023-12-05 | 2024-01-05 | 深圳玉汝成口腔材料有限公司 | Denture durability detection method and denture detection device |
-
2018
- 2018-01-24 CN CN201820118949.5U patent/CN207923636U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072582A (en) * | 2018-01-24 | 2018-05-25 | 济南大学 | Parallel artificial tooth frictional testing machine and the method for testing friction abrasion |
| CN117347217A (en) * | 2023-12-05 | 2024-01-05 | 深圳玉汝成口腔材料有限公司 | Denture durability detection method and denture detection device |
| CN117347217B (en) * | 2023-12-05 | 2024-02-13 | 深圳玉汝成口腔材料有限公司 | Denture durability detection method and denture detection device |
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