CN110333143A - Test machine - Google Patents
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- CN110333143A CN110333143A CN201910772303.8A CN201910772303A CN110333143A CN 110333143 A CN110333143 A CN 110333143A CN 201910772303 A CN201910772303 A CN 201910772303A CN 110333143 A CN110333143 A CN 110333143A
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- 238000012360 testing method Methods 0.000 title claims abstract description 83
- 230000005484 gravity Effects 0.000 claims abstract description 11
- 238000010079 rubber tapping Methods 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims 1
- 230000008450 motivation Effects 0.000 claims 1
- 230000006798 recombination Effects 0.000 claims 1
- 238000005215 recombination Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 6
- 210000000988 bone and bone Anatomy 0.000 description 16
- 238000004088 simulation Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- Physics & Mathematics (AREA)
- General 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)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The embodiment provides a kind of test machines, and for detecting the self tapping performance of Medical screw, test machine includes rack, the first driving assembly, the second driving assembly, elastic component and balance weight assembly；First driving assembly is connect with rack, and the second driving assembly is connect with housing slide, and elastic component is between the first driving assembly and the second driving assembly and can be held in the first driving assembly and the second driving assembly simultaneously；Balance weight assembly is connect with rack, for balancing the gravity of the second driving assembly, so that elastic component is in nature；First driving assembly is for driving elastic component to move, so that elastic component is compressed and drives the second driving assembly far from the first driving assembly；Second driving assembly is for driving Medical screw to be tested to rotate.The error of the test machine measurement result is small, and accuracy is high.
Description
Technical field
The present invention relates to testing equipment fields, in particular to a kind of test machine.
Background technique
The self tapping performance of Medical screw is a very important performance indicator, referring generally to examination criteria be ASTM
F543-A4 increases the axial load pressure of Medical screw with constant rate of speed.
The study found that the detection device of the existing self tapping performance for detecting Medical screw has the following disadvantages:
Testing result error is big.
Summary of the invention
The purpose of the present invention includes, for example, providing a kind of test machine, the self tapping performance that can reduce Medical screw is surveyed
The error of test result improves the accuracy of testing result.
The embodiment of the present invention this can be implemented so that
In a first aspect, the embodiment of the present invention provides a kind of test machine, for detecting the self tapping performance of Medical screw, test machine
Include:
Rack, the first driving assembly, the second driving assembly, elastic component and balance weight assembly；First driving assembly and rack
Connection, the second driving assembly connect with housing slide, and elastic component is between the first driving assembly and the second driving assembly and energy
Enough while being held in the first driving assembly and the second driving assembly；Balance weight assembly is connect with rack, for balancing the second driving group
The gravity of part, so that elastic component is in nature；First driving assembly is for driving elastic component to move, so that elastic component is compressed
And drive the second driving assembly far from the first driving assembly；Second driving assembly is for driving Medical screw to be tested to rotate.
In alternative embodiments, elastic component includes spring, and spring is located at the first driving assembly and the second driving assembly
Between, and the both ends of spring can support the first driving assembly and the second driving assembly simultaneously.
In alternative embodiments, elastic component is connect with the first driving assembly and the second driving assembly respectively.
In alternative embodiments, the first driving assembly includes stretching structure, and stretching structure is connect with rack, for driving
Dynamic elasticity part is close or far from the second driving assembly.
In alternative embodiments, the second driving assembly includes motor and sliding part, sliding part and housing slide
Cooperation, motor are connect with sliding part, and motor is for driving screw to be tested to rotate；Elastic component can be supported in sliding part
On.
In alternative embodiments, guide part is provided in rack, sliding part is slidably matched with guide part.
In alternative embodiments, the second driving assembly further includes fixture, the output axis connection of fixture and motor, folder
Tool is for clamping screw to be tested.
In alternative embodiments, balance weight assembly includes bracing wire, pulley blocks and clump weight, and pulley blocks and rack connect
It connects, bracing wire is set around pulley blocks, and one end of bracing wire is connect with the second driving assembly, and the other end is connect with clump weight.
In alternative embodiments, balance weight assembly further includes load-bearing part, and load-bearing part is connect with housing slide, bracing wire with hold
Holder connection, clump weight are placed on load-bearing part.
In alternative embodiments, test machine further includes first sensor and second sensor, and first sensor is used
The pressure on screw to be tested is acted in detecting the first driving assembly；Second sensor is made for detecting the second driving assembly
With the torsion on screw to be tested.
The beneficial effect of the embodiment of the present invention includes, for example:
To sum up, a kind of test machine is present embodiments provided, during the test, the system that test machine and measured object are constituted
Rigidity be affected to test result, set the rigidity of the first driving assembly as K1, the rigidity of the second driving assembly is K2, to
The rigidity of the composite structure of the Medical screw and simulation bone block of test is K3.It should be appreciated that test when, need be by test machine
Medical screw provides stable axial compressive force, and therefore, the rigidity of the first driving assembly and the second driving assembly is larger, to guarantee
Radial and axial deformation is not susceptible in test process, therefore, the numerical value of K1 and K2 are much larger than the numerical value of K3, not set bullet
Property part test macro overall stiffness K0=1/ (1/K1+1/K2+1/K3), the result of K0 is approximately equal to K3, when Medical screw and
When simulating the change of at least one of both bone blocks, the overall stiffness of system will be changed, and be affected.It is not set when utilizing
During the test equipment test Medical screw performance of elastic component, for Medical screw and the simulation continually changing feelings of bone block
Condition needs to adjust the pid value of test equipment according to the experience of operator, to reach ideal control effect.Therefore, not set
Due to operator's difference when the test equipment of elastic component uses, the effect of adjusting is different, and it is big to eventually lead to test result error,
Accuracy is poor.Existing test equipment does not use elastic component, causes measurement error big, accuracy is poor.And the present embodiment provides
Test machine, including elastic component sets the rigidity of elastic component as K4, and the rigidity of elastic component is much smaller than the numerical value of K1, K2 and K3, surveys
Stiffness K 0 '=1/ (1/K1+1/K2+1/K3+1/K4) of test system entirety, the result of K0 ' are approximately equal to K4, namely when replacement is different
Medical screw and simulation bone block when carrying out corresponding test, since elastic component does not change, system will not be caused
Rigidity has large change, does not need the debugging of carry out system, reduces difficulty of test, and improves the accuracy of test result.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram at the first visual angle of test machine provided in this embodiment；
Fig. 2 is the structural schematic diagram at the second visual angle of test machine provided in this embodiment.
Icon:
001- test machine；002- Medical screw；003- simulates bone block；100- rack；110- pedestal；120- column；130-
Crossbeam；140- fixed plate；150- guide part；The first driving assembly of 200-；210- axial direction electric machine；220- pressing plate；300- second drives
Dynamic component；310- motor；320- sliding panel；330- fixture；400- elastic component；500- balance weight assembly；510- bracing wire；520- is sliding
Wheel group；530- clump weight；540- load-bearing part；600- first sensor；700- second sensor.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that if there is the side of the instructions such as term " on ", "lower", "inner", "outside"
Position or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when the side usually put
Position or positional relationship, are merely for convenience of description of the present invention and simplification of the description, rather than the device or member of indication or suggestion meaning
Part must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, being only used for distinguishing description if there is term " first ", " second " etc., it is not understood to indicate or imply phase
To importance.
It should be noted that in the absence of conflict, the feature in the embodiment of the present invention can be combined with each other.
A kind of test machine 001 is present embodiments provided, suitable for testing the self tapping performance of Medical screw 002, specifically, with
In the axial load forces of test Medical screw 002.The performance parameter error for the Medical screw 002 that the test block measurement obtains is small,
Accurately and reliably.
In the present embodiment, Fig. 1 and Fig. 2 are please referred to, Fig. 1 shows the structural schematic diagram at the first visual angle of test machine 001, figure
2 show the structural schematic diagram at the second visual angle of test machine 001.Test machine 001 include rack 100, the first driving assembly 200,
Second driving assembly 300, elastic component 400 and balance weight assembly 500；First driving assembly 200 is connect with rack 100, and second drives
Dynamic component 300 is slidably connected with rack 100, and elastic component 400 is between the first driving assembly 200 and the second driving assembly 300
And it can be held in the first driving assembly 200 and the second driving assembly 300 simultaneously；Balance weight assembly 500 is connect with rack 100, is used
In the gravity for balancing the second driving assembly 300, so that elastic component 400 is in nature, wherein nature refers to elastic component
400 in being not stretched, also un-compressed state；First driving assembly 200 is for driving elastic component 400 to move, so that bullet
Property part 400 is compressed and drives the second driving assembly 300 far from the first driving assembly 200；Second driving assembly 300 is for driving
Medical screw 002 to be tested rotates.
It should be noted that test machine 001 provided in this embodiment, in use, vertical place, the first driving assembly 200,
Elastic component 400, the second driving assembly 300, Medical screw 002 and simulation bone block 003 are successively arranged from top to bottom.In test equipment
It before operation, needs to adjust balance weight assembly 500, so that balance weight assembly 500 balances the gravity of the second driving assembly 300, makes to be located at the
Elastic component 400 between one driving assembly 200 and the second driving assembly 300 is in nature, then can star the first driving
Component 200 and the second driving assembly 300 are tested.First driving assembly 200 provides axial force, and pressing elastic component 400 makes bullet
Property part 400 deformation occurs and generates elastic force, the concentric force of the first driving assembly 200 is first converted into elastic force, then pass through the elastic force
300 slide downward of the second driving assembly is driven, meanwhile, the second driving assembly 300 is that the Medical screw 002 being mounted thereon provides
Torsion makes Medical screw 002 screw in simulation bone block by the collective effect of the first driving assembly 200 and the second driving assembly 300
003。
During the test, the rigidity for the system that test machine 001 is constituted with measured object is affected to test result, if
The rigidity of fixed first driving assembly 200 is K1, and the rigidity of the second driving assembly 300 is K2, Medical screw 002 to be tested and mould
The rigidity of the composite structure of quasi- bone block 003 is K3.It should be appreciated that needing through test machine 001 to be Medical screw 002 when test
Stable axial compressive force is provided, therefore, the rigidity of the first driving assembly 200 and the second driving assembly 300 is larger, to guarantee surveying
Radial and axial deformation is not susceptible to during examination, therefore, the numerical value of K1 and K2 are much larger than the numerical value of K3, not set elasticity
The overall stiffness K0=1/ (1/K1+1/K2+1/K3) of the test macro of part 400, the result of K0 are approximately equal to K3, work as Medical screw
When at least one of both 002 and simulation bone block 003 change, the overall stiffness of system will be changed, and be affected.Work as benefit
During testing 002 performance of Medical screw with the test equipment of not set elastic component 400, for Medical screw 002 and simulation
The continually changing situation of bone block 003, needs to adjust the pid value of test equipment according to the experience of operator, to reach ideal
Control effect.Therefore, due to operator's difference when the test equipment of not set elastic component 400 uses, the effect of adjusting is different,
Eventually lead to that test result error is big, and accuracy is poor.And existing test equipment does not use elastic component 400, it is medical when changing
Screw 002 or simulation bone block 003 at least one when, the influence for system stiffness is big, needs operator rule of thumb
Pid value is adjusted, and then causes the measurement error big, accuracy is poor.And test machine 001 provided in this embodiment, including elastic component
400, the rigidity of elastic component 400 is set as K4, and the rigidity of elastic component 400 is much smaller than the numerical value of K1, K2 and K3, and test macro is whole
Stiffness K 0 '=1/ (1/K1+1/K2+1/K3+1/K4), the result of K0 ' is approximately equal to K4, namely when replacing different Medical screws
002 and simulation bone block 003 when carrying out corresponding test, since elastic component 400 does not change, the rigid of system will not be caused
Degree has large change, does not need the debugging of carry out system, reduces difficulty of test, and improves the accuracy of test result.
It should be noted that above-mentioned calculation formula is related to the Rigidity Calculation formula of system after spring series connection, it is as follows:
When two spring series connection, it is assumed that spring is by pulling force F, then, first spring extends L1=F/K1, and second spring is stretched
Long L2=F/K2, then general extension L=(F/K1+F/K2), new stiffness coefficient (stiffness factor) are K=F/L=1/ (1/K1+1/
K2)。
Optionally, rack 100 includes pedestal 110, two root posts 120, crossbeam 130 and fixed plate 140,110 water of pedestal
Flat setting, 120 parallel interval of two root posts are arranged and connect with pedestal 110, and crossbeam 130 is fixed with two columns 120 simultaneously
Connection, fixed plate 140 are fixedly connected with crossbeam 130.Pedestal 110 towards fixed plate 140 a plate face for place with it is to be tested
The simulation bone block 003 that Medical screw 002 cooperates.The hole penetrated for Medical screw 002 can be preset in simulation bone block 003.
Further, rack 100 further includes guide part 150, and guide part 150 can be cylindrical bar, guide part 150 and solid
Fixed board 140 is fixedly connected, and guide part 150 is parallel with column 120.
Optionally, elastic component 400 includes spring, and the deformability of spring is strong namely the rigidity of spring is small, spring rate
Numerical value reciprocal is big, and the rigidity of entire test macro is more stable.The both ends of spring simultaneously with the first driving assembly 200 and second
Driving assembly 300 connects, and when spring is vertically arranged, certain tensile deformation occurs under its own weight, in order to improve test result
Accuracy, in test, needing to adjust balance weight assembly 500 makes spring in nature.Balance weight assembly 500 is needed while being balanced
The gravity of second driving assembly 300 and the gravity of spring, make to be located at the first driving assembly 200 and the second driving assembly 300 it
Between spring be not both stretched or do not compressed, in it is no storage elastic force nature, when the first driving assembly 200
There is provided axial force makes, and the elastic force that spring generates is equal with axial force, improves the accuracy of test result.
In other embodiments, elastic component 400 may include rubber pad.In addition, elastic component 400 is set to the first driving group
Between part 200 and the second driving assembly 300, during the test, the opposite two sides of elastic component 400 can drive with first simultaneously
Component 200 and the second driving assembly 300 support, and elastic component 400 can not be with the first driving assembly 200 and the second driving group
Part 300 connects.
In the present embodiment, the first driving assembly 200 be elastic component 400 axial force is provided so that elastic component 400 by compression and
Downward thrust is generated, the movement of the second driving assembly 300 is pushed.First driving assembly 200 may include stretching structure, for example,
In the present embodiment, the first driving assembly 200 includes axial direction electric machine 210.Alternatively, in other embodiments, the first driving assembly 200
Including cylinder, hydraulic cylinder, rack and pinion drive mechanism or Lead screw transmission structure etc..
Further, the first driving assembly 200 further includes pressing plate 220, and pressing plate 220 makes elasticity for pressing elastic component 400
The stress of part 400 is more balanced, and the elastic force for making elastic component 400 is substantially vertically, be not likely to produce with vertical with angle
Component on direction improves the accuracy of test result.Pressing plate 220 is slidably connected with guide part 150.
In the present embodiment, the second driving assembly 300 is that Medical screw 002 to be tested provides torsion, can drive peace
It rotates, and then is screwed onto simulation bone block 003 loaded on the Medical screw 002 on the second driving assembly 300.Optionally, it second drives
Dynamic component 300 includes motor 310, and motor 310 is slidably connected with rack 100, can be in the first driving assembly 200 and elasticity
Short transverse under the mating reaction of part 400 along rack 100 reciprocatingly slides.
Further, the second driving assembly 300 includes sliding part, and sliding part can be sliding panel 320, on sliding panel 320
It is provided with pilot hole.Motor 310 is connect with sliding panel 320, and sliding panel 320 is slidably connected with rack 100.In other words, sliding
Pilot hole on movable plate 320 is slidably matched with guide part 150, and guide part 150 is arranged in pilot hole, and sliding panel 320 can edge
Guide part 150 axial reciprocating sliding.It should be noted that the quantity of the pilot hole on sliding panel 320 can be one or
Person is multiple, and when the quantity of pilot hole is multiple, the quantity of guide part 150 is also multiple, multiple guide parts 150 and multiple guiding
Hole corresponds and is slidably matched.
Further, the second driving assembly 300 further includes fixture 330, the output axis connection of fixture 330 and motor 310,
Fixture 330 is for clamping Medical screw 002, and under the driving of motor 310, Medical screw 002 is rotated together with output shaft.
Fixture 330 can be three-jaw clamper.
In the present embodiment, balance weight assembly 500 include bracing wire 510, pulley blocks 520 and clump weight 530, pulley blocks 520 with
Rack 100 connects, and bracing wire 510 is set around pulley blocks 520, and one end of bracing wire 510 is connect with the second driving assembly 300, another
One end is connect with clump weight 530.Optionally, bracing wire 510 is connect with the sliding panel 320 of the second driving assembly 300, and bracing wire 510
One end that the one end and bracing wire 510 connecting with sliding panel 320 are connect with clump weight 530 is located at the two sides of crossbeam 130, in other words
It says, sliding panel 320 is located at the two sides of crossbeam 130 with clump weight 530, convenient for the setting of balance weight assembly 500.It should be noted that
The quantity of 520 middle pulley of pulley blocks is arranged on demand, herein without specifically limiting.
Further, balance weight assembly 500 further includes load-bearing part 540, and load-bearing part 540 is slidably connected with rack 100, specifically
, load-bearing part 540 is slidably connected with crossbeam 130 by guide frame, and guide frame can be mutually matched guide post guide sleeve etc..
Bracing wire 510 is connect with load-bearing part 540, and clump weight 530 is placed on load-bearing part 540.Load-bearing part 540 includes bearing frame, bearing frame energy
Clump weight 530 is enough accommodated, the clump weight 530 in load-bearing part 540 can be increased and decreased on demand to adjust the second driving assembly 300
Gravity.It should be noted that, since Medical screw 002 has gravity, being needed at this time after Medical screw 002 is installed on fixture 330
The gravity of clump weight 530 is adjusted with the common gravity of balance medical screw 002 and the second driving assembly 300, to keep elasticity
In the raw, since clump weight 530 is placed directly in load-bearing part 540, it is convenient to pick and place for part 400.Clump weight 530 can be weight
Code operates more convenient convenient for directly reading the weight of clump weight 530.
In the present embodiment, optionally, test machine 001 further includes first sensor 600 and second sensor 700, and first
Sensor 600 is for detecting the pressure that the first driving assembly 200 acts on Medical screw 002 to be tested；Second sensor
700 for detecting the torsion that the second driving assembly 300 acts on Medical screw 002 to be tested.Optionally, first sensor
600 are set on pedestal 110.Second sensor 700 is set on sliding part.
Test machine 001 provided in this embodiment, the rigidity of whole system are approximately equal to the inverse of the rigidity of elastic component 400, i.e.,
When making the replacement of at least one of Medical screw 002 and simulation bone block 003, the variation of the rigidity of whole system is small, does not need to adjust
Pid value is tried, it is more convenient to measure, and measurement error is small, and measurement result is more accurate.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of protection of the claims
It is quasi-.
Claims (10)
1. a kind of test machine, for detecting the self tapping performance of Medical screw, which is characterized in that the test machine includes:
Rack, the first driving assembly, the second driving assembly, elastic component and balance weight assembly；First driving assembly with it is described
Rack connection, second driving assembly connect with the housing slide, the elastic component be located at first driving assembly with
First driving assembly and second driving assembly can be held between second driving assembly and simultaneously；It is described to match
Recombination part is connect with the rack, for balancing the gravity of second driving assembly, so that the elastic component is in nature；
First driving assembly is for driving the elastic component to move, so that the elastic component is compressed and drives second driving
Component is far from first driving assembly；Second driving assembly is for driving the Medical screw to be tested to rotate.
2. test machine according to claim 1, it is characterised in that:
The elastic component includes spring, the spring between first driving assembly and second driving assembly, and
The both ends of the spring can support first driving assembly and second driving assembly simultaneously.
3. test machine according to claim 1 or 2, it is characterised in that:
The elastic component is connect with first driving assembly and second driving assembly respectively.
4. test machine according to claim 1, it is characterised in that:
First driving assembly includes stretching structure, and the stretching structure is connect with the rack, for driving the elasticity
Part is close or far from second driving assembly.
5. test machine according to claim 1, it is characterised in that:
Second driving assembly includes motor and sliding part, and the sliding part and the housing slide cooperate, the electricity
Motivation is connect with the sliding part, and the motor is for driving the Medical screw to be tested to rotate；The elastic component energy
It enough supports on the sliding part.
6. test machine according to claim 5, it is characterised in that:
Guide part is provided in the rack, the sliding part is slidably matched with the guide part.
7. test machine according to claim 5, it is characterised in that:
Second driving assembly further includes fixture, and the output axis connection of the fixture and the motor, the fixture is used for
Clamp the Medical screw to be tested.
8. test machine according to claim 1, it is characterised in that:
The balance weight assembly includes bracing wire, pulley blocks and clump weight, and the pulley blocks are connect with the rack, the bracing wire around
Set on the pulley blocks, and one end of the bracing wire is connect with second driving assembly, and the other end and the clump weight connect
It connects.
9. test machine according to claim 8, it is characterised in that:
The balance weight assembly further includes load-bearing part, and the load-bearing part is connect with the housing slide, the bracing wire and the carrying
Part connection, the clump weight are placed on the load-bearing part.
10. test machine according to claim 1, it is characterised in that:
The test machine further includes first sensor and second sensor, and the first sensor drives for detecting described first
Dynamic component acts on the pressure on the Medical screw to be tested；The second sensor is for detecting second driving group
Part acts on the torsion on the Medical screw to be tested.
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| CN201910772303.8A CN110333143A (en) | 2019-08-21 | 2019-08-21 | Test machine |
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| CN201910772303.8A CN110333143A (en) | 2019-08-21 | 2019-08-21 | Test machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964580A (en) * | 2021-03-17 | 2021-06-15 | 哈尔滨工业大学 | Concrete tensile impact performance test device and impact test method thereof |
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