CN104748663B - A kind of detection method of bearing inner race Pore Diameter Detection mechanism - Google Patents
A kind of detection method of bearing inner race Pore Diameter Detection mechanism Download PDFInfo
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- CN104748663B CN104748663B CN201510147979.XA CN201510147979A CN104748663B CN 104748663 B CN104748663 B CN 104748663B CN 201510147979 A CN201510147979 A CN 201510147979A CN 104748663 B CN104748663 B CN 104748663B
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Abstract
The present invention discloses a kind of detection method of inner ring aperture testing agency, belongs to bearing inner race detection technique field.When measured bearing inner ring is moved into the station to be checked of testing agency, lifting platform declines, detection part declines therewith, the Y-direction internal diameter in first section of bearing inner race is first measured, then, lifting platform declines again, the Y-direction internal diameter in second section of bearing inner race is measured again, and the measurement data in above-mentioned two section is sent to the data processing module of operating desk, by measuring the Y-direction internal diameter on two different cross sections of bearing inner race to be measured, data processing module can calculate the hole taper of bearing inner race to be measured；After measured bearing inner ring completes Y-direction inner diameter measurement, bearing inner race moves into X to measuring claw, and the internal diameter in two sections of measured bearing inner ring is measured again, internal diameter size, circularity and the taper of measured bearing inner ring is finally calculated.Above-mentioned detection method quickly can accurately measure pore size, circularity and the taper of bearing inner race.
Description
The present invention be the applying date be on April 9th, 2013, Application No. 201310121326.5 is entitled《A kind of axle
Hold inner ring aperture testing agency and its detection method》Divisional application.
Technical field
The present invention relates to a kind of testing agency for bearing inner race hole diameter detection apparatus and its detection method, belong to bearing
Inner ring detection technique field.
Background technology
Bearing is the important foundation parts of all kinds of mechanized equipments, including outer ring, inner ring and ball etc., wherein, in bearing
The accuracy of the aperture size of circle, circularity and taper directly affects the precision and performance of bearing.
It is presently used for detecting that the automation hole diameter detection apparatus of bearing inner race generally comprises base, and installed in base
On feed mechanism, transfer mechanism, testing agency, discharge mechanism and control unit etc., the testing agency is mostly using pneumatic
Measurement, that is, the change for utilizing the gas sprayed from measurement device to produce afterwards before measuring calculates the big of bearing inner race aperture
It is small.Above-mentioned pneumatic gauging requires very high to stable gas pressure, otherwise can cause larger error；In addition, to bearing inner race
Cleannes require also very high, when there is the pollutants such as greasy dirt, dust in the aperture of bearing inner race, can all change the feedback of air pressure
Value, so as to influence measurement accuracy.
In view of this, the present inventor is studied this on the basis of existing technology, is specially developed a kind of for axle
The detection method of inner ring aperture testing agency is held, thus this case produces.
The content of the invention
It is an object of the invention to provide a kind of measurement accuracy height, stability are good, the interior of bearing inner race can be once detected simultaneously
The detection method of the bearing inner race Pore Diameter Detection mechanism in footpath, circularity and taper.
To achieve these goals, solution of the invention is：
A kind of bearing inner race Pore Diameter Detection mechanism, including operating desk, Lift Part and detection part etc., wherein, test section
Part is fixedly mounted on below Lift Part, and operating desk is connected with Lift Part, detection part respectively by signal wire, the detection
Part includes X to detection part and Y-direction detection part, X to detection part and Y-direction detection part include a displacement transducer,
Test aircraft, start cylinder and measuring claw, measuring claw are arranged on below test aircraft, and displacement transducer and start cylinder are arranged in test aircraft
Between, the opening and closing of measuring claw are controlled in test aircraft elastomer block by start cylinder action, displacement transducer is measured in real time
The deformational displacement of test aircraft elastomer block.
Above-mentioned Lift Part includes the guide rod being arranged on transfer mechanism station platform, the lifting platform being movably arranged on guide rod
And the lifting motor above lifting platform, detection part is fixedly mounted on the lower section of lifting platform, and lifting motor passes through electricity
Machine fixed station is arranged on the top of guide rod, and lifting platform is connected by leading screw with motor, and lifting platform is in lifting motor and the work of leading screw
Under, it can be slided up and down along guide rod.
Above-mentioned test aircraft includes fixed frame and the elastomer block being vertically mounted in the middle of fixed frame, and start cylinder and displacement are passed
The through hole that sensor is each passed through on fixed frame and elastomer block is horizontally arranged in test aircraft.
Above-mentioned elastomer block is made up of two spring leafs and the block in the middle of spring leaf, two spring leaf one end and fixation
Framework is connected, and the other end is connected with block, and the piston rod of start cylinder is in contact with block, for promoting elastomer block, so that
Control the opening and closing of measuring claw；The probe of displacement transducer is also in contact with block, in real time the deformation position of detection elastomer block
Move, 2 ends of 2 spring leafs are equipped with DISCRETE ELASTIC SUPPORTS, and spring leaf is parallel with block to be installed, when not deforming upon, 4 DISCRETE ELASTIC SUPPORTSs
A rectangle is constituted, parallelogram is gradually become in deformation process.
A spring is additionally provided between block and fixed frame, the coefficient of elasticity of the spring is less than or greater than above-mentioned spring leaf
Coefficient of elasticity, for preventing measuring claw from being shaken in measurement process.
Preferably, displacement transducer is provided with a contact chip with block contact position, contact chip hardness is high and smooth, Ke Yixuan
Select sheet glass or quartz plate.
Preferably, institute's displacement sensors are LVDT displacement transducers.
The Y-direction and X are made up of to measuring claw the survey mass of 2 semi-cylindricals, and one of survey mass is fixedly mounted on
On the fixed frame of side frame, the lateral surface of its circular arc is provided with 2 salient points, and another survey mass is fixedly mounted on the bullet of test aircraft
Property block on, the lateral surface of its circular arc is provided with 1 salient point, and above-mentioned 3 salient points are in isoceles triangle on the measuring claw of cylinder
Shape.When elastic deformation does not occur for elastomer block, spacing is left between two survey mass, generally 0.5-3mm provides for elastic deformation
Enough spaces.
Above-mentioned X also respectively includes an air cylinder supporting structure to detection part and Y-direction detection part, and the air cylinder supporting structure is arranged on
On lifting platform, for fixing start cylinder.
Aforesaid operations platform include touch-screen, button, warning lamp and data processing module, operating desk directly with bearing inner race hole
Footpath detection means control unit is communicated, and man-machine interaction is realized by touch-screen and button, and failure report is realized by warning lamp
It is alert；The input of data processing module is connected with displacement transducer, and output end is connected with control unit.
The detection method of above-mentioned bearing inner race Pore Diameter Detection mechanism, comprises the following steps：
1）When measured bearing inner ring is moved into the station to be checked of testing agency, lifting platform declines, and detection part is under
Drop, now, start cylinder action deforms upon spring leaf on the block of elastomer block, the spacing contracting between two survey mass
Small, Y-direction measuring claw is stretched into behind the aperture of measured bearing inner ring, and the piston rod of start cylinder is retracted, and first measures bearing inner race first
The Y-direction internal diameter in individual section, then, lifting platform declines again, and Y-direction measuring claw is measured in the Y-direction in second section of bearing inner race again
The measurement data in above-mentioned two section is sent to the data processing module of operating desk by footpath, LVDT displacement transducers, passes through measurement
Y-direction internal diameter on two different cross sections of bearing inner race to be measured, data processing module can calculate the endoporus of bearing inner race to be measured
Taper；
2）After measured bearing inner ring completes Y-direction inner diameter measurement, bearing inner race is moved into X to survey by the displacement piece of transfer mechanism
Measuring jaw, X measures the internal diameter in two sections of measured bearing inner ring to measuring claw again, then sends measured data to operating desk
Data processing module, data processing module according to above-mentioned Y-direction and X to data, calculate measured bearing inner ring internal diameter size,
Circularity and taper, are then sent to control unit by result of calculation, and control unit is according to measurement result by measured bearing inner ring
It is divided into：The partially especially big bearing inner race in qualified bearing inner race, aperture（Scrap greatly）, aperture bearing inner race bigger than normal（Scrapped in i.e.）, hole
The micro- bearing inner race bigger than normal in footpath（It is i.e. small to scrap）, aperture bearing inner race less than normal（That is reprocessed products）, aperture bearing inner race less than normal can be again
Processing and utilization.
Compared with prior art, detection method of the present invention has the following advantages that：
1. using inductance type measurement, it is difficult to be disturbed by external environment, quickly can accurately measures bearing inner race
Pore size, circularity and taper；
2. 4 DISCRETE ELASTIC SUPPORTSs in elastomer block can make measuring claw not influence its perpendicularity, Jin Erbao in elastomer block deformation
Demonstrate,prove its measurement accuracy；
3. setting a coefficient of elasticity and the inconsistent spring of spring leaf between block and fixed frame, measurement can be prevented
Pawl is shaken, it is ensured that measurement accuracy.
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Brief description of the drawings
Fig. 1 is the bearing inner race hole diameter detection apparatus dimensional structure diagram of the present embodiment；
Fig. 2 is the bearing inner race Pore Diameter Detection mechanism front view of the present embodiment；
Fig. 3 is the bearing inner race Pore Diameter Detection mechanism dimensional structure diagram of the present embodiment；
Fig. 4 is the bearing inner race Pore Diameter Detection mechanism test aircraft structural representation of the present embodiment；
Label declaration：
Base 1；Feed mechanism 2；Transfer mechanism 3；Conveyer belt 31；Shift piece 32；
Testing agency 4；Operating desk 41；
Y-direction inner diameter measurement part 42；Y-direction measuring claw 421；Y-direction test aircraft fixed frame 422；Y-direction test aircraft elastomer block 423；Y
To displacement transducer 424；Y-direction start cylinder 425；Air cylinder supporting structure 426；
X is to internal diameter detection part 43；X is to measuring claw 431；X is to test aircraft fixed frame 432；X is to test aircraft elastomer block 433；X
To displacement transducer 434；X is to start cylinder 435；Air cylinder supporting structure 436；Spring 437；Block 438；Spring leaf 439；DISCRETE ELASTIC SUPPORTS
43a、43b、43c、43d；Contact chip 43e；
Guide rod 44；Lifting platform 45；Lifting motor 46；Motor fixed station 47；Leading screw 48；
Discharge mechanism 5；Bearing inner race 6 to be measured.
Embodiment
As shown in figure 1, a kind of bearing inner race hole diameter detection apparatus, including base 1, and the feeding on base 1
Mechanism 2, transfer mechanism 3, testing agency 4 and discharge mechanism 5 etc., wherein, feed mechanism 2 is arranged on the conveyer belt 31 of transfer mechanism 3
Side, testing agency 4 be arranged on transfer mechanism 3 shift piece 32 side, discharge mechanism 5 be located at displacement piece 32 lower section, on
Material mechanism 2 on bearing inner race to be measured 6 by conveyer belt 31 and displacement piece 32 be transported to testing agency 4, after testing after pass through again
Shift piece 31 and move into discharge mechanism 5；Described device further comprises control unit, control unit by signal wire respectively with feeding
Mechanism 2, transfer mechanism 3, testing agency 4 are connected with discharge mechanism 5；The testing agency 4 include operating desk 41, Lift Part and
Detection part etc..
As Figure 2-3, a kind of bearing inner race Pore Diameter Detection mechanism 4, its operating desk 41 by signal wire respectively with lifting
Part is connected with detection part, above-mentioned Lift Part include be arranged on transfer mechanism station platform on guide rod 44, be movably arranged on
Lifting platform 45 on guide rod 44 and the lifting motor 46 installed in the top of lifting platform 45, detection part is fixedly mounted on lifting platform
45 lower section, lifting motor 46 is arranged on the top of guide rod 44 by motor fixed station 47, and lifting platform 45 passes through silk with motor 46
Thick stick 48 is connected, and lifting platform 45 can be slided up and down in the presence of lifting motor 46 and leading screw 48 along guide rod 44.
The detection part includes X to detection part 43 and Y-direction detection part 42, and X is to detection part 43 and Y-direction test section
The structure of part 42 is completely the same, and its installation direction is different, and the former installs along X-axis, and the latter installs along Y-axis, and both of which includes a LVDT
Displacement transducer 434 and 424, test aircraft, start cylinder 435 and 425, and measuring claw 431 and 421.Above-mentioned test aircraft includes fixing
Framework 432 and 422 and the elastomer block 433 and 423 being vertically mounted in the middle of fixed frame, start cylinder 435 and 425, displacement
Sensor 434 and 424 is each passed through fixed frame 432 and 422, the through hole in elastomer block 433 and 423 and is horizontally arranged at test aircraft
On, in the present embodiment, start cylinder 435 and 425 is located at the top of LVDT displacement transducers 434 and 424, and the present embodiment is selected
LVDT displacement transducers it is higher than common displacement transducer repeatable accuracy.
As shown in figure 4, by X to exemplified by detection part, above-mentioned elastomer block 433 is by two spring leafs 439 and positioned at spring leaf
Block 438 in the middle of 439 is constituted, and two one end of spring leaf 439 are connected with fixed frame 432, and the other end connects with block 438
Connect, the piston rod of start cylinder 435 is in contact with block 438, for promoting elastomer block 433, so as to control of measuring claw 431
Open and close are closed；The probe of displacement transducer 434 is also in contact with block 438, in real time the deformational displacement of detection elastomer block 433,2
2 ends of spring leaf 439 are equipped with DISCRETE ELASTIC SUPPORTS, and spring leaf 439 is parallel with block 438 to be installed, when not deforming upon, 4 bullets
Property point 43a ~ 43d constitute a rectangle, parallelogram is gradually become in deformation process.Whole elastomer block 433 can use bullet
Spring Steel material, but in actual production process, it is contemplated that spring steel cost is high, and processing is inconvenient, and elastomer block 433 can be adopted
With iron or other metals, and only 4 DISCRETE ELASTIC SUPPORTS 43a ~ 43d on spring leaf use spring steel, have so both saved cost, again
It is easy to drill in elastomer block, cuts.A spring 437, the bullet of the spring 437 are additionally provided between block 438 and fixed frame 432
Property coefficient is less than or greater than the coefficient of elasticity of above-mentioned spring leaf 439, for preventing measuring claw from being shaken in measurement process.
Displacement transducer 434 is provided with a contact chip 43e with the contact position of block 438, and contact chip 43e hardness is high and smooth, can
To select sheet glass or quartz plate.Above-mentioned X also respectively includes an air cylinder supporting structure to detection part 43 and Y-direction detection part 42
436 and 426, the air cylinder supporting structure 436 and 426 is L-shaped, and one end is fixed on lifting platform 45, and the other end is used to fix
Start cylinder 435 and 425.
The Y-direction measuring claw 421 and X are constituted to measuring claw 431 by the survey mass of 2 semi-cylindricals, one of to survey
Gauge block is fixedly mounted on the fixed frame 422 and 432 of side frame, and the lateral surface of its circular arc is provided with 2 salient points, another survey
Gauge block is fixedly mounted in the elastomer block 423 and 433 of test aircraft, and the lateral surface of its circular arc is provided with 1 salient point, and above-mentioned 3 convex
Point is in isosceles triangle on the measuring claw of cylinder.When elastic deformation does not occur for elastomer block 423 and 433, two survey mass it
Between leave spacing, generally 0.5-3mm, enough spaces are provided for elastic deformation.
Aforesaid operations platform include touch-screen, button, warning lamp and data processing module, operating desk directly with bearing inner race hole
Footpath detection means control unit is communicated, and man-machine interaction is realized by touch-screen and button, and failure report is realized by warning lamp
It is alert；The input of data processing module is connected with LVDT displacement transducers 424 and 434, and output end is connected with control unit.
The detection method of above-mentioned bearing inner race hole diameter detection apparatus testing agency, comprises the following steps：
1）When measured bearing inner ring 6 is moved into the station to be checked of testing agency, lifting platform 45 declines, and X is to detection part
43 and Y-direction detection part 42 decline therewith, in the present embodiment, first carry out Y-direction measurement, now, start cylinder 425 acts on bullet
Property block 423 block on, deform upon spring leaf, spacing between two survey mass reduces, Y-direction measuring claw 421 stretch into by
Behind the aperture for surveying bearing inner race 6, the piston rod of start cylinder 425 is retracted, in the Y-direction for first measuring 6 first sections of bearing inner race
Footpath, then, lifting platform 45 decline again, and Y-direction measuring claw 421 measures the Y-direction internal diameter in 6 second sections of bearing inner race, LVDT again
The measurement data in above-mentioned two section is sent to the data processing module of operating desk 41 by displacement transducer 424, is treated by measurement
The Y-direction internal diameter surveyed on two different cross sections of bearing inner race, data processing module can calculate the inner hole cone of bearing inner race 6 to be measured
Degree；
2）After measured bearing inner ring 6 completes Y-direction inner diameter measurement, bearing inner race 6 is moved into X by the displacement piece 32 of transfer mechanism
To measuring claw 431, X measures the internal diameter in the hole Nei Liangge sections of measured bearing inner ring 6 to measuring claw 431 again, then will measure number
According to the quantity processing module for being sent to operating desk 41, data processing module according to above-mentioned Y-direction and X to data, calculate tested
Internal diameter size, circularity and the taper of bearing inner race 6, are then sent to control unit, control unit is according to survey by result of calculation
Measure result is for 6 points by measured bearing inner ring：The partially especially big bearing inner race in qualified bearing inner race, aperture（Scrap greatly）, aperture it is bigger than normal
Bearing inner race（Scrapped in i.e.）, the micro- bearing inner race bigger than normal in aperture（It is i.e. small to scrap）, aperture bearing inner race less than normal（That is reprocessed products）, hole
Footpath bearing inner race less than normal can processing and utilization again.
Above-described embodiment and schema and non-limiting product form of the invention and style, any art it is common
Appropriate change or modification that technical staff is done to it, all should be regarded as not departing from the patent category of the present invention.
Claims (1)
1. a kind of detection method of bearing inner race Pore Diameter Detection mechanism, it is characterised in that the testing agency includes operating desk, risen
Part and detection part drop, wherein, detection part is fixedly mounted on below Lift Part, operating desk by signal wire respectively with liter
Drop part, detection part to be connected, the detection part includes X to detection part and Y-direction detection part, X is to detection part and Y-direction
Detection part includes a displacement transducer, test aircraft, start cylinder and measuring claw, and measuring claw is arranged on below test aircraft, and displacement is passed
Sensor and start cylinder are arranged in the middle of test aircraft, and opening for measuring claw is controlled in test aircraft elastomer block by start cylinder action
And closure, displacement transducer measures the deformational displacement of test aircraft elastomer block in real time；
Guide rod that above-mentioned Lift Part includes being arranged on transfer mechanism station platform, the lifting platform that is movably arranged on guide rod and
Lifting motor above lifting platform, detection part is fixedly mounted on the lower section of lifting platform, and lifting motor is solid by motor
Determine the top that platform is arranged on guide rod, lifting platform is connected by leading screw with motor；
Above-mentioned test aircraft includes fixed frame and the elastomer block being vertically mounted in the middle of fixed frame, start cylinder and displacement transducer
The through hole being each passed through on fixed frame and elastomer block is horizontally arranged in test aircraft；
Above-mentioned elastomer block is made up of two spring leafs and the block in the middle of spring leaf, two spring leaf one end and fixed frame
It is connected, the other end is connected with block, the piston rod of start cylinder is in contact with block, for promoting elastomer block, so as to control
The opening and closing of measuring claw；The probe of displacement transducer is also in contact with block, in real time the deformational displacement of detection elastomer block, 2
2 ends of individual spring leaf are equipped with DISCRETE ELASTIC SUPPORTS, and spring leaf is parallel with block to be installed, when not deforming upon, 4 DISCRETE ELASTIC SUPPORTS compositions
One rectangle, gradually becomes parallelogram in deformation process；
The Y-direction and X are made up of to measuring claw the survey mass of 2 semi-cylindricals, and one of survey mass is fixedly mounted on side frame
Fixed frame on, the lateral surface of its circular arc is fixedly mounted on the elastomer block of test aircraft provided with 2 salient points, another survey mass
On, the lateral surface of its circular arc is provided with 1 salient point, and above-mentioned 3 salient points are in isosceles triangle on the measuring claw of cylinder；Institute
Detection method is stated to comprise the following steps：
1）When measured bearing inner ring is moved into the station to be checked of testing agency, lifting platform declines, and detection part declines therewith, this
When, start cylinder action deforms upon spring leaf on the block of elastomer block, and the spacing between two survey mass reduces, Y-direction
Measuring claw is stretched into behind the aperture of measured bearing inner ring, and the piston rod of start cylinder is retracted, and first measures first section of bearing inner race
Y-direction internal diameter, then, lifting platform declines again, and Y-direction measuring claw measures the Y-direction internal diameter in second section of bearing inner race, LVDT again
The measurement data in above-mentioned two section is sent to the data processing module of operating desk by displacement transducer, by measuring bearing to be measured
Y-direction internal diameter on two different cross sections of inner ring, data processing module can calculate the hole taper of bearing inner race to be measured；
2）After measured bearing inner ring completes Y-direction inner diameter measurement, bearing inner race is moved into X to measurement by the displacement piece of transfer mechanism
Pawl, X measures the internal diameter in two sections of measured bearing inner ring to measuring claw again, then sends measured data to the number of operating desk
According to processing module, data processing module according to above-mentioned Y-direction and X to data, calculate internal diameter size, the circle of measured bearing inner ring
Degree and taper, are then sent to control unit by result of calculation, and control unit divides measured bearing inner ring according to measurement result
For：The partially especially big bearing inner race in qualified bearing inner race, aperture, aperture bearing inner race bigger than normal, the micro- bearing inner race bigger than normal in aperture are small, aperture
Bearing inner race less than normal, aperture bearing inner race less than normal can processing and utilization again.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510147979.XA CN104748663B (en) | 2013-04-09 | 2013-04-09 | A kind of detection method of bearing inner race Pore Diameter Detection mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310121326.5A CN103225999B (en) | 2013-04-09 | 2013-04-09 | A kind of bearing inner race Pore Diameter Detection mechanism and detection method thereof |
| CN201510147979.XA CN104748663B (en) | 2013-04-09 | 2013-04-09 | A kind of detection method of bearing inner race Pore Diameter Detection mechanism |
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| CN201310121326.5A Division CN103225999B (en) | 2013-04-09 | 2013-04-09 | A kind of bearing inner race Pore Diameter Detection mechanism and detection method thereof |
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| CN104748663A CN104748663A (en) | 2015-07-01 |
| CN104748663B true CN104748663B (en) | 2017-08-25 |
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| CN201510147979.XA Active CN104748663B (en) | 2013-04-09 | 2013-04-09 | A kind of detection method of bearing inner race Pore Diameter Detection mechanism |
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|---|---|---|---|---|
| CN103225999B (en) * | 2013-04-09 | 2015-07-29 | 绍兴中轴自动化设备有限公司 | A kind of bearing inner race Pore Diameter Detection mechanism and detection method thereof |
| CN103591920B (en) * | 2013-10-23 | 2016-04-06 | 苏州紫金港智能制造装备有限公司 | A kind of Plate-shaped parts inner diameter measurement platform |
| CN103759687A (en) * | 2014-01-28 | 2014-04-30 | 浙江长城换向器有限公司 | Commutator inner-hole automatic detection mechanism |
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| CN107270857B (en) * | 2017-06-15 | 2019-08-02 | 常熟理工学院 | Tapered roller bearing internal ring circularity detection device |
| CN109282781A (en) * | 2017-07-21 | 2019-01-29 | 山东浩尔特轴承制造有限公司 | A kind of outer ring detection device of tapered roller bearing |
| CN107626602A (en) * | 2017-09-27 | 2018-01-26 | 常熟理工学院 | Bearing automatic measurement sorting equipment based on micro-displacement sensor |
| CN108955483A (en) * | 2018-08-27 | 2018-12-07 | 吉林省迪泰尔精密机械有限责任公司 | Finishing of internal diameter diameter measurement machine |
| CN110398193B (en) * | 2019-07-29 | 2021-04-13 | 长春光华学院 | Thin-wall cylinder part cylindricity detection device and detection method thereof |
| CN113048926A (en) * | 2021-03-24 | 2021-06-29 | 新昌浙江工业大学科学技术研究院 | Multi-parameter automatic detection device and method for outer ring of bearing |
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| CN103225999A (en) * | 2013-04-09 | 2013-07-31 | 绍兴中轴自动化设备有限公司 | Bearing inner ring diameter detection mechanism and detection method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103225999B (en) | 2015-07-29 |
| CN103225999A (en) | 2013-07-31 |
| CN104748663A (en) | 2015-07-01 |
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