CN106092438A - Pull and push dynamometer assay device - Google Patents
Pull and push dynamometer assay device Download PDFInfo
- Publication number
- CN106092438A CN106092438A CN201610669698.5A CN201610669698A CN106092438A CN 106092438 A CN106092438 A CN 106092438A CN 201610669698 A CN201610669698 A CN 201610669698A CN 106092438 A CN106092438 A CN 106092438A
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- supporting plate
- pull
- push dynamometer
- standard
- afterburning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Pull and push dynamometer assay device, belongs to mechanical metrology device field.Pull and push dynamometer assay device, it can improve the efficiency of pull and push dynamometer Measurement Verification Work, reduce working strength, improve the accuracy of verification result.The vertical supporting plate one end that adjusts is arranged on vertical adjustment mechanism, standard supporting plate lower surface one end is rotationally connected by rotating mechanism one with the vertical adjustment supporting plate other end, standard reaction plate is fixing with the standard splint upper surface other end to be connected, offer through elongated hole one along base length direction in standard reaction plate, force cell is placed on standard supporting plate, the most afterburning movable supporting plate lower slide is arranged on mechanism for axial adjusting, the most afterburning movable supporting plate upper end is rotationally connected by rotating mechanism two with pull and push dynamometer supporting plate lower surface one end, the pull and push dynamometer splint upper surface other end is fixing with pull and push dynamometer reaction plate to be connected, pull and push dynamometer is placed on pull and push dynamometer supporting plate.The present invention is applicable to the calibrating of pull and push dynamometer.
Description
Technical field
The invention belongs to mechanical metrology device field, particularly relate to a kind of pull and push dynamometer assay device.
Background technology
At present, in measurement verification department, the calibration operation of pull and push dynamometer mainly uses newton counterweight or a kilogram counterweight
Becoming, be not specifically designed for the assay device of pull and push dynamometer, therefore make that calibration operation efficiency is low, working strength big, verification result is deposited
In difference.
Summary of the invention
The problem existed for above-mentioned prior art, the present invention provides a kind of pull and push dynamometer assay device, and it can improve
The efficiency of pull and push dynamometer Measurement Verification Work, reduction working strength, improve the accuracy of verification result.
The technical solution used in the present invention is: pull and push dynamometer assay device, and it includes base vertical adjustment mechanism, vertical
Adjust supporting plate, standard supporting plate, rotating mechanism one, standard reaction plate, force cell, mechanism for axial adjusting, the most axial
Afterburning supporting plate, pull and push dynamometer supporting plate, rotating mechanism two, pull and push dynamometer reaction plate, boosting-rod and pulling force counter-force frame；Described vertical tune
Complete machine structure is fixedly mounted on base upper surface one end, and described vertical adjustment supporting plate one end is arranged on vertical adjustment mechanism, described
Standard pallets level is arranged on above vertical adjustment supporting plate, standard supporting plate lower surface one end and the vertical adjustment supporting plate other end
Being rotationally connected by rotating mechanism one, standard reaction plate is fixing with the standard splint upper surface other end to be connected, and standard is anti-
Offering through elongated hole one along base length direction in power plate, described force cell is placed on standard supporting plate,
Described mechanism for axial adjusting is fixedly mounted on the base upper surface other end, and described the most afterburning movable supporting plate lower end is sliding
Moving and be arranged on mechanism for axial adjusting, whirler is passed through with pull and push dynamometer supporting plate lower surface one end in the most afterburning movable supporting plate upper end
Structure two is rotationally connected, and the described pull and push dynamometer splint upper surface other end is fixing with pull and push dynamometer reaction plate to be connected, described push-pull effort
Offering through elongated hole two along base length direction in meter reaction plate, described pull and push dynamometer is placed on pull and push dynamometer supporting plate,
When thrust is examined and determine, described force cell passes through boosting-rod imposed load with pull and push dynamometer,
When pulling force is examined and determine, described pulling force counter-force frame contacts with standard reaction plate and is formed pulling force chamber, and described dynamometry passes
Sensor is arranged on pulling force intracavity, and force cell is fixing with pulling force counter-force frame to be connected.
The beneficial effects of the present invention is:
Deft design the most of the present invention, easily fabricated, the calibrating of pull and push dynamometer thrust and pulling force can be realized, it is possible to increase push-and-pull
The efficiency of power meter Measurement Verification Work, reduction working strength, improve the accuracy of verification result.
2. the present invention can be automatically obtained force cell axis and the automatic centering in one plane of pull and push dynamometer axis,
Easy and simple to handle, accurately and reliably.
Accompanying drawing explanation
Fig. 1: when pull and push dynamometer is carried out thrust calibrating, front view of the present invention；
Fig. 2: top view of the present invention；
Fig. 3: when pull and push dynamometer is carried out pulling force calibrating, front view of the present invention；
Fig. 4: left view of the present invention；
The standard reaction plate front view of Fig. 5: the present invention；
The standard reaction plate left view of Fig. 6: the present invention；
The enlarged drawing that the pulling force counter-force frame of Fig. 7: the present invention couples with force cell；
In figure: 1. base, 2. standard vertically adjusts trapezoidal screw, the most vertically adjusts supporting plate, 4. standard adjusting pole,
5. adjusting handwheel, 6. bearing block one, 7. supporting plate axle one, 8. ball bearing one, 9. axial guidance supports seat, 10. standard supporting plate,
11. standard reaction plates, 11-1. elongated hole one, 12. force cells, 13. the most afterburning movable supporting plates, 14. pull and push dynamometer, 15.
Pull and push dynamometer supporting plate, 16. pull and push dynamometer reaction plates, 17. rolling linear bearings, 18. afterburning trapezoidal screws, 19. axially directed axles,
20. the most afterburning handwheels, 21. boosting-rods, 22. vertically-guided bars, 23. pulling force counter-force frames, 24. vertical adjustment mechanism, 25. rotate
Mechanism one, 26. mechanism for axial adjusting, 27. rotating mechanisms two, 28. bearing blocks two, 29. supporting plate axles two, 30. ball bearings two.
Detailed description of the invention
As shown in Fig. 1～Fig. 7, pull and push dynamometer assay device, it includes base 1, vertical adjustment mechanism 24, vertically adjusts torr
Plate 3, standard supporting plate 10, rotating mechanism 1, standard reaction plate 11, force cell 12, mechanism for axial adjusting 26, movable
The most afterburning supporting plate 13, pull and push dynamometer supporting plate 15, rotating mechanism 2 27, pull and push dynamometer reaction plate 16, boosting-rod 21 and pulling force are anti-
Power frame 23；Described vertical adjustment mechanism 24 is fixedly mounted on base 1 upper surface one end, and described vertical adjustment supporting plate 3 one end is installed
On vertical adjustment mechanism 24, described standard supporting plate 10 is horizontally set on above vertical adjustment supporting plate 3, standard supporting plate 10 times
One end, surface is rotationally connected by rotating mechanism 1 with vertical adjustment supporting plate 3 other end, standard reaction plate 11 and standard
The supporting plate 10 upper surface other end connects by screw is fixing, offers through along base 1 length direction in standard reaction plate 11
Elongated hole one 11-1, described force cell 12 is placed on standard supporting plate 10,
Described mechanism for axial adjusting 26 is fixedly mounted on the base 1 upper surface other end, described the most afterburning movable supporting plate 13
Lower slide is arranged on mechanism for axial adjusting 26, the most afterburning movable supporting plate 13 upper end and pull and push dynamometer supporting plate 15 lower surface one
End is rotationally connected by rotating mechanism 2 27, and the described pull and push dynamometer supporting plate 15 upper surface other end leads to pull and push dynamometer reaction plate 16
Cross that screw is fixing to be connected, in described pull and push dynamometer reaction plate 16, offer through elongated hole two along base 1 length direction, described in push away
Strain gauge 14 is placed on pull and push dynamometer supporting plate 15,
When thrust is examined and determine, described force cell 12 passes through boosting-rod 21 imposed load with pull and push dynamometer 14,
When pulling force is examined and determine, described pulling force counter-force frame 23 contacts with standard reaction plate 11 and is formed pulling force chamber, described survey
Force transducer 12 is arranged on pulling force intracavity, and force cell 12 is connected by screw is fixing with pulling force counter-force frame 23.
Described vertical adjustment mechanism 24 includes that standard adjusting pole 4, standard vertically adjust trapezoidal screw 2, adjust hands
Wheel 5 and two vertically-guided bars 22, described standard adjusting pole 4 is fixedly mounted on base 1 upper surface one end, institute by screw
Stating two vertically-guided bars 22 to be fixedly mounted on standard adjusting pole 4 along the arrangement of base 1 width, described standard hangs down
The straight trapezoidal screw 2 that adjusts is arranged in the middle of two vertically-guided bars 22, and standard vertically adjusts trapezoidal screw 2 and is fixedly mounted on mark
On quasi-device adjusting pole 4, described adjustment handwheel 5 is vertical with standard adjusts that trapezoidal screw 2 upper end is fixing to be connected, described vertical tune
Plate 3 one end adjust trapezoidal screw 2 vertical with standard that put one's child in a boarding nursery is connected by screw pair, one end and two described in vertical adjustment supporting plate 3
Individual vertically-guided bar 22 is slidably connected.
Described mechanism for axial adjusting 26 include axial guidance support seat 9, rolling linear bearing 17, afterburning trapezoidal screw 18,
Axially directed axle 19 and the most afterburning handwheel 20；Described axial guidance supports seat 9 and is fixedly mounted on base 1 upper surface by screw
The other end, described afterburning trapezoidal screw 18 and the equal level of axially directed axle 19 and be set up in parallel up and down, reinforcing trapezoidal screw 18
Two ends are rotationally connected by ball bearing three and axial guidance support seat 9 respectively, the two ends of described axially directed axle 19 with axially lead
Rail supports the fixing connection of seat 9, and described axial afterburning handwheel 20 is fixing with afterburning trapezoidal screw 18 one end to be connected, described movable axial
Afterburning supporting plate 13 lower end is connected by screw pair with afterburning trapezoidal screw 18, and the most afterburning movable supporting plate 13 lower end is with axially directed
Axle 19 is slidably connected by rolling linear bearing 17.
Described rotating mechanism 1 includes bearing block 1, supporting plate axle 1 and ball bearing 1；Described supporting plate axle 1 upper end
Being connected by screw is fixing with standard supporting plate 10 lower surface one end, ball bearing 1 and bearing are passed through in described supporting plate axle 1 lower end
Seat 1 is rotationally connected, and described bearing block 1 is connected by screw is fixing with vertical adjustment supporting plate 3 other end.Its effect is: mark
Quasi-device supporting plate 10 can 360 ° of rotations, force cell 12 axis and pull and push dynamometer 14 axis can be automatically obtained in one plane
Automatic centering.
Described rotating mechanism 2 27 includes bearing block 2 28, supporting plate axle 2 29 and ball bearing 2 30；Described supporting plate axle 2 29
Upper end is connected by screw is fixing with pull and push dynamometer 14 supporting plate lower surface one end, and ball bearing two is passed through in described supporting plate axle 2 29 lower end
30 are rotationally connected with bearing block 2 28, and described bearing block 2 28 is fixing even by screw with the most afterburning movable supporting plate 13 upper end
Connect.Its effect is: the most afterburning movable supporting plate 13 can 360 ° of rotations, force cell 12 axis and pull and push dynamometer can be automatically obtained
The automatic centering in one plane of 14 axis.
The side that described standard reaction plate 11 contacts with force cell 12 is stress surface one, and described stress surface one is circle
Cambered surface one, the radius of gyration that the arc radius of described arc surface one turns round with standard reaction plate 11 is equivalently-sized.
The side that described pull and push dynamometer reaction plate 15 contacts with pull and push dynamometer 14 is stress surface two, and described stress surface two is circle
Cambered surface two, the radius of gyration that the arc radius of described arc surface two turns round with pull and push dynamometer reaction plate 15 is equivalently-sized.
Described pulling force counter-force frame 23 is U-shaped frame, and the opening of described U-shaped frame is arranged towards standard reaction plate 11, U-shaped frame
Two end faces are inclined-plane, and the outer end on said two inclined-plane is all to the bottom surface lopsidedness of U-shaped frame.
Described boosting-rod 21 be two ends be the cylindrical bar of bulb.
Operation principle:
Rotate standard by rotation adjustment handwheel 5 and vertically adjust trapezoidal screw 2, the vertical supporting plate 3 that adjusts can be driven along hanging down
Straight guide post 22 moves up and down, it is achieved force cell 12 axis is consistent with pull and push dynamometer 14 axis height；
Afterburning trapezoidal screw 18 can be made to rotate by axial rotary reinforcing handwheel 20, drive the most afterburning supporting plate 13 vertically
The axis of guide 19 moves,
When pull and push dynamometer 14 carries out thrust calibrating, force cell 12 lies on standard supporting plate 10, force-measuring sensing
Device 12 bottom face and the arc surface Local Phase contact of standard reaction plate 11；Pull and push dynamometer 14 lies in pull and push dynamometer supporting plate
On 15, pull and push dynamometer 14 bottom face and the arc surface Local Phase contact of pull and push dynamometer reaction plate 16；Force cell 12 He
Pull and push dynamometer 14 is respectively associated with thrust fitting, and there are ball-and-socket, the bulb of boosting-rod 21 and ball-and-socket phase in each thrust fitting one end
Coordinate and apply pressure；Axial rotary reinforcing handwheel 20 again, is driven pull and push dynamometer supporting plate 15, push-and-pull by the most afterburning movable supporting plate 13
Power meter reaction plate 16 drives pull and push dynamometer 14 to apply pressure by the boosting-rod 21 force cell 12 on standard supporting plate 10,
After imposed load, force cell 12 axis can adjust coaxial with pull and push dynamometer 14 axis automatically；
When pull and push dynamometer 14 carries out pulling force calibrating, force cell 12 and pulling force counter-force frame 23, by screw attachment, draw
The inclined-plane retroaction of power counter-force frame 23 in standard reaction plate 11 cambered surface, the top end face of pull and push dynamometer 14 and pull and push dynamometer counter-force
The arc surface Local Phase contact of plate 16, pull and push dynamometer 14 is connected with the pulling force joint with little hook, with the pulling force of little hook
Joint is connected through the elongated hole two of pull and push dynamometer reaction plate 16, force cell 12 with carrying foraminate pulling force joint, with
The pulling force joint of aperture through elongated hole one 11-1 of standard reaction plate 11, with little hook pulling force joint with carry foraminate drawing
Power joint hook connects, axial rotary reinforcing handwheel 20, is driven pull and push dynamometer supporting plate 15 by the most afterburning movable supporting plate 13 and is pushed away
Strain gauge reaction plate 16 drives pull and push dynamometer 14 to apply pulling force.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (9)
1. a pull and push dynamometer assay device, it is characterised in that: it includes base (1), vertical adjustment mechanism (24), vertically adjusts
Supporting plate (3), standard supporting plate (10), rotating mechanism one (25), standard reaction plate (11), force cell (12), axially adjust
Complete machine structure (26), the most afterburning movable supporting plate (13), pull and push dynamometer supporting plate (15), rotating mechanism two (27), pull and push dynamometer counter-force
Plate (16), boosting-rod (21) and pulling force counter-force frame (23)；Described vertical adjustment mechanism (24) is fixedly mounted on base (1) upper surface
One end, described vertical adjustment supporting plate (3) one end is arranged on vertical adjustment mechanism (24), and described standard supporting plate (10) level sets
Putting and vertically adjusting supporting plate (3) top, rotation is passed through with vertical supporting plate (3) other end that adjusts in standard supporting plate (10) lower surface one end
Rotation mechanism one (25) is rotationally connected, and standard reaction plate (11) is fixing with standard supporting plate (10) the upper surface other end to be connected, mark
Through elongated hole one (11-1), described force cell (12) is offered along base (1) length direction in quasi-device reaction plate (11)
It is placed on standard supporting plate (10),
Described mechanism for axial adjusting (26) is fixedly mounted on base (1) the upper surface other end, described the most afterburning movable supporting plate
(13) lower slide is arranged on mechanism for axial adjusting (26), the most afterburning movable supporting plate (13) upper end and pull and push dynamometer supporting plate
(15) lower surface one end is rotationally connected by rotating mechanism two (27), described pull and push dynamometer supporting plate (15) the upper surface other end with push away
Strain gauge reaction plate (16) is fixing to be connected, and offers through along base (1) length direction in described pull and push dynamometer reaction plate (16)
Elongated hole two, described pull and push dynamometer (14) is placed on pull and push dynamometer supporting plate (15),
When thrust is examined and determine, described force cell (12) passes through boosting-rod (21) imposed load with pull and push dynamometer (14),
When pulling force is examined and determine, described pulling force counter-force frame (23) contacts and is formed pulling force chamber, described survey with standard reaction plate (11)
Force transducer (12) is arranged on pulling force intracavity, and force cell (12) is fixing with pulling force counter-force frame (23) to be connected.
Pull and push dynamometer assay device the most according to claim 1, it is characterised in that: described vertical adjustment mechanism (24) includes
Standard adjusting pole (4), standard vertically adjust trapezoidal screw (2), adjust handwheel (5) and two vertically-guided bars (22),
Described standard adjusting pole (4) is fixedly mounted on base (1) upper surface one end, and said two vertically-guided bar (22) is along base
(1) width arrangement is fixedly mounted on standard adjusting pole (4), and described standard vertically adjusts trapezoidal screw (2) and sets
Putting in the middle of two vertically-guided bars (22), standard vertically adjusts trapezoidal screw (2) and is fixedly mounted on standard adjusting pole
(4), on, described adjustment handwheel (5) is vertical with standard adjusts that trapezoidal screw (2) upper end is fixing to be connected, described vertical adjustment supporting plate
(3) one end adjust trapezoidal screw (2) vertical with standard is connected by screw pair, vertically adjusts supporting plate (3) described one end and two
Individual vertically-guided bar (22) is slidably connected.
Pull and push dynamometer assay device the most according to claim 1, it is characterised in that: described mechanism for axial adjusting (26) includes
Axial guidance supports seat (9), rolling linear bearing (17), afterburning trapezoidal screw (18), axially directed axle (19) and axially reinforcing
Handwheel (20)；Described axial guidance supports seat (9) and is fixedly mounted on base (1) the upper surface other end, described afterburning trapezoidal screw
(18) and axially directed axle (19) all levels and being set up in parallel up and down, ball bearing is passed through at the two ends of afterburning trapezoidal screw (18) respectively
Three support seat (9) with axial guidance is rotationally connected, and the two ends of described axially directed axle (19) and axial guidance support seat (9) and fix
Connecting, described axial afterburning handwheel (20) is fixing with afterburning trapezoidal screw (18) one end to be connected, described the most afterburning movable supporting plate
(13) lower end is connected by screw pair with afterburning trapezoidal screw (18), the most afterburning movable supporting plate (13) lower end and axially directed axle
(19) it is slidably connected by rolling linear bearing (17).
Pull and push dynamometer assay device the most according to claim 1 and 2, it is characterised in that: described rotating mechanism one (25) wraps
Include bearing block one (6), supporting plate axle one (7) and ball bearing one (8)；Under described supporting plate axle one (7) upper end and standard supporting plate (10)
One end, surface is fixing to be connected, and described supporting plate axle one (7) lower end is rotationally connected with bearing block one (6) by ball bearing one (8), described
With vertical, bearing block one (6) adjusts that supporting plate (3) other end is fixing to be connected.
5. according to the pull and push dynamometer assay device described in claim 1 or 3, it is characterised in that: described rotating mechanism two (27) wraps
Include bearing block two (28), supporting plate axle two (29) and ball bearing two (30)；Described supporting plate axle two (29) upper end and pull and push dynamometer (14)
Supporting plate lower surface one end is fixing to be connected, and described supporting plate axle two (29) lower end is rotated with bearing block two (28) by ball bearing two (30)
Connecting, described bearing block two (28) is fixing with the most afterburning movable supporting plate (13) upper end to be connected.
Pull and push dynamometer assay device the most according to claim 1, it is characterised in that: described standard reaction plate (11) and survey
The side that force transducer (12) contacts is stress surface one, and described stress surface one is arc surface one, the circular arc of described arc surface 1 half
The radius of gyration that footpath is turned round with standard reaction plate (11) is equivalently-sized.
Pull and push dynamometer assay device the most according to claim 1, it is characterised in that: described pull and push dynamometer reaction plate (15) with
The side that pull and push dynamometer (14) contacts is stress surface two, and described stress surface two is arc surface two, the circular arc of described arc surface 2 half
The radius of gyration that footpath is turned round with pull and push dynamometer reaction plate (15) is equivalently-sized.
Pull and push dynamometer assay device the most according to claim 1, it is characterised in that: described pulling force counter-force frame (23) is U-shaped
Frame, the opening of described U-shaped frame is arranged towards standard reaction plate (11), and two end faces of U-shaped frame are inclined-plane, and said two is oblique
The outer end in face is all to the bottom surface lopsidedness of U-shaped frame.
Pull and push dynamometer assay device the most according to claim 1, it is characterised in that: described boosting-rod (21) be two ends be ball
The cylindrical bar of head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610669698.5A CN106092438B (en) | 2016-08-15 | 2016-08-15 | Pull and push dynamometer calibrating installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610669698.5A CN106092438B (en) | 2016-08-15 | 2016-08-15 | Pull and push dynamometer calibrating installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106092438A true CN106092438A (en) | 2016-11-09 |
| CN106092438B CN106092438B (en) | 2018-08-28 |
Family
ID=58069252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610669698.5A Active CN106092438B (en) | 2016-08-15 | 2016-08-15 | Pull and push dynamometer calibrating installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106092438B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374199A (en) * | 2018-12-07 | 2019-02-22 | 哈尔滨市计量检定测试院 | A kind of dynamometer calibrating installation |
| CN109443639A (en) * | 2018-12-21 | 2019-03-08 | 广州赛宝计量检测中心服务有限公司 | A kind of measuring device |
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|---|---|---|---|---|
| CN109374199A (en) * | 2018-12-07 | 2019-02-22 | 哈尔滨市计量检定测试院 | A kind of dynamometer calibrating installation |
| CN109374199B (en) * | 2018-12-07 | 2024-01-19 | 哈尔滨市计量检定测试院 | Dynamometer calibrating device |
| CN109443639A (en) * | 2018-12-21 | 2019-03-08 | 广州赛宝计量检测中心服务有限公司 | A kind of measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106092438B (en) | 2018-08-28 |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Duoli Inventor after: Zhang Hui Inventor after: Li Shiyan Inventor after: Zhao Yue Inventor after: Yuan Shuai Inventor after: Liu Jinling Inventor after: Jin Longxue Inventor after: Yang Zhiyong Inventor after: Li Jianjuan Inventor after: Zhang Shijun Inventor after: Yuan Xiaodai Inventor after: Xu Tengyu Inventor after: Wu Yueming Inventor after: Zhao Yunpeng Inventor before: Zhang Duoli Inventor before: Zhang Hui Inventor before: Li Shiyan Inventor before: Zhao Yue Inventor before: Yuan Shuai Inventor before: Liu Jinling Inventor before: Jin Longxue Inventor before: Yang Zhiyong Inventor before: Li Jianjuan Inventor before: Zhang Shijun Inventor before: Yuan Xiaodai Inventor before: Xu Tengyu Inventor before: Wu Yueming Inventor before: Zhao Yunpeng |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |