CN104596565B - Large-angle swinging test table - Google Patents
Large-angle swinging test table Download PDFInfo
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- CN104596565B CN104596565B CN201410848477.5A CN201410848477A CN104596565B CN 104596565 B CN104596565 B CN 104596565B CN 201410848477 A CN201410848477 A CN 201410848477A CN 104596565 B CN104596565 B CN 104596565B
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Abstract
The invention provides a large-angle swinging test table, including a test base, a platform, a driving mechanism and a turning mechanism, wherein the turning mechanism includes a power assembly and a turning ring, the platform supports the turning ring to rotate around the central line of the turning ring, and the power assembly provides power for driving the turning ring to rotate around the central line thereof; the driving mechanism includes a front driving assembly, a rear driving assembly and a lateral driving assembly uniformly distributed on the side wall of the platform; the front driving assembly and the rear driving assembly are arranged symmetrically; the lateral driving assembly is arranged between the front and rear driving assemblies; the front driving assembly includes a first hydraulic cylinder and a second hydraulic cylinder; the included angle between the piston rods of the first and second hydraulic cylinders is am acute angle. The large-angle swinging test table can swing in a large angle of two degrees of freedom, meanwhile the product to be tested can be rotated and moved upwards; the large-angle swinging test table is simple and ingenious in structural design, so that the test table is very convenient to maintain when a fault occurs.
Description
Technical field
The invention belongs to testing inspection field, especially relates to a kind of wide-angle Swaying Test Platform.
Background technology
Swaying Test Platform is a kind of analogue simulation assay device, produces different degrees of for the requirement of different product
Rolling test, however in existing Swaying Test Platform not two degree of freedom all can the testing stand that waves of wide-angle, simultaneously
Can there are some unstable situations it is impossible to accurately carry out spy according to test requirements document in rolling test in the structure of existing testing stand
Rocking action under tentering degree.
Content of the invention
The invention problem to be solved is to propose a kind of two degree of freedom and all can achieve to wave and the waving of wide-angle
Testing stand.
For solving above-mentioned technical problem, the invention the technical scheme is that a kind of wide-angle Swaying Test Platform, its
Including testing stand, platform, drive mechanism and slew gear；
Described platform is located at the top of described testing stand；
Described slew gear includes Power Component and turning circle, and this turning circle of described platform supports rotates around its axis,
Described Power Component provides, for described turning circle, the power rotating around its axis；
Described drive mechanism includes front drive component, rear drive component and the side drive component being distributed in mesa sidewalls,
Described front drive component and rear drive component are symmetrically set up, described side drive component located at front drive component and rear drive component it
Between, described front drive component includes first hydraulic cylinder and second hydraulic cylinder, the piston of described first hydraulic cylinder and second hydraulic cylinder
Masthead portion is adjacent to be set up and all hinged with described platform, the bottom of described first hydraulic cylinder and second hydraulic cylinder all with described test
Table-hinges connects, and the axis angle of the piston rod of first hydraulic cylinder and second hydraulic cylinder is acute angle, and described rear drive component includes
Three hydraulic cylinders and the 4th hydraulic cylinder, and the 3rd hydraulic cylinder and the 4th hydraulic cylinder piston rod part adjacent set up and with described platform
Hinged, the bottom of the 3rd hydraulic cylinder and the 4th hydraulic cylinder is all hinged with described testing stand, and described side drive component includes first
Hinge and the second hinge, described first hinge is placed between second hydraulic cylinder and the 3rd hydraulic cylinder, described second hinge
Portion is placed between first hydraulic cylinder and the 4th hydraulic cylinder, and the top of the first hinge and the second hinge is all hinged with platform,
Its bottom is all hinged with testing stand.
Further, described first hydraulic cylinder, second hydraulic cylinder, the 3rd hydraulic cylinder and the 4th hydraulic cylinder piston rod part equal
Side walls hinged by Hooke's hinge and described platform.
Further, described first hydraulic cylinder, the bottom of second hydraulic cylinder, the 3rd hydraulic cylinder and the 4th hydraulic cylinder are all by ball
Hinge is hinged with described testing stand.
Further, described platform is for having manhole, the axis of described turning circle and this circle in the middle part of polyhedron and its
The axis of shape through hole is conllinear, and the annular diameters of described turning circle are more than the aperture of described manhole.
Further, the outer wall around described turning circle uniformly has tooth bar, and described Power Component includes motor and gear, described
Gear is engaged with the tooth bar on described turning circle, and this gear is placed on the outer wall of described motor output shaft.
Further, described first hinge and the second hinge all include hinge and lower hinge, and described upper hinge
It is hinged with described platform that Hooke's hinge is passed through at top.
Further, two side walls of the bottom of described upper hinge are arranged with hinge hanger on a pair, described lower hinge
Top and bottom two side walls on be equipped with a pair symmetrical lower hinge hanger, a pair of nextpage at the top of described lower hinge
Form rotation space between piece hanger, and this is to rotating shaft in supporting one between lower hinge hanger, the bottom of described upper hinge is placed in
In this rotation space, through the through hole on upper hinge hanger, on this, hinge passes through rotating shaft and institute in this for simultaneously described middle rotating shaft
State lower hinge and rotate and connect.
Further, support a lower rotary shaft between a pair of described lower hinge bottom lower hinge hanger, described testing stand sets
Have and connect hanger corresponding a pair with this lower hinge hanger, this lower hinge bottom is turned with described connection hanger by described lower rotary shaft
It is dynamically connected.
Further, described side drive component also includes fiveth hydraulic pressure corresponding with the first hinge and the second hinge respectively
Cylinder and the 6th hydraulic cylinder, the lower surface of the middle and upper part of described upper hinge has a groove, and two internal groove side walls of this groove have
A pair symmetrical installing hole, by this to rotating shaft in installing hole supporting one, the upper hinge in described first hinge is passed through thereon
The upper rotating shaft installed is hinged with the piston rod of the 5th hydraulic cylinder, and the upper hinge in described second hinge is upper by install thereon
Rotating shaft is hinged with the piston rod of the 6th hydraulic cylinder.
Further, the bottom of the 5th hydraulic cylinder and the 6th hydraulic cylinder is all hinged with described testing stand by ball pivot.
The invention has the advantages and positive effects that: for this testing stand is compared to existing testing stand, can be two
The large angle pendulum of individual degree of freedom, also enables to provide rotation and ascending motion, structure design to the product needing test simultaneously
Simple and ingenious, so testing stand is when breaking down, maintenance is also very convenient.
Brief description
Fig. 1 is the structural representation of the present embodiment；
Fig. 2 is the structural representation of the slew gear of the present embodiment；
Fig. 3 is the structural representation of second hinge of the present embodiment；
Fig. 4 is the first hydraulic cylinder of the present embodiment and the displacement curve figure of second hydraulic cylinder；
Fig. 5 is the 3rd hydraulic cylinder of the present embodiment and the displacement curve figure of the 4th hydraulic cylinder；
Fig. 6 is the pin joint speed curve diagram of the first hydraulic cylinder of the present embodiment to the 4th hydraulic cylinder；
Fig. 7 is the first hydraulic cylinder of the present embodiment and the pin joint stress curve figure of second hydraulic cylinder；
Fig. 8 is the 3rd hydraulic cylinder of the present embodiment and the pin joint stress curve figure of the 4th hydraulic cylinder；
Fig. 9 is the rotation stress curve figure in first hinge of the present embodiment；
Figure 10 is the rotation stress curve figure in second hinge of the present embodiment；
Figure 11 be the present embodiment platform move 5 seconds when be subject to bang load when second hydraulic cylinder pin joint stress
Curve chart；
Figure 12 be the present embodiment platform move 5 seconds when be subject to bang load when the 3rd hydraulic cylinder pin joint stress
Curve chart；
Figure 13 be the present embodiment platform move 5 seconds when be subject to bang load when first hinge rotate stress curve
Figure；
Figure 14 be the present embodiment platform move 5 seconds when be subject to bang load when second hinge rotate stress curve
Figure.
In figure:
1st, first hydraulic cylinder 2, second hydraulic cylinder 3, the 3rd hydraulic cylinder 4 the 4th hydraulic cylinder
5th, the 5th hydraulic cylinder 6, the 6th hydraulic cylinder 7, the first hinge 8, the second hinge
9th, testing stand 10, platform 11, ball pivot 12, Hooke's hinge
82nd, lower hinge 821, lower rotary shaft 83, upper hinge 84, middle rotating shaft
831st, upper rotating shaft 91, turning circle 92, motor 921, gear
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the invention is elaborated.
In the present embodiment, to the 4th hydraulic cylinder all using a length of 4500mm of cylinder, stroke is 3000mm to first hydraulic cylinder, the 5th
The a length of 2600mm of cylinder of hydraulic cylinder and the 6th hydraulic cylinder, stroke is 2000mm；
And Hooke's hinge and ball pivot are 400kn's all using bearing capacity.
And first hinge 7 and the second hinge 8 rotate the rotating shaft that stress point is in corresponding Hooke's hinge 12
Stress.
As Figure 1-3, a kind of wide-angle Swaying Test Platform, it includes testing stand 9, platform 10, drive mechanism and revolution
Mechanism；
Described platform 10 is located at the top of described testing stand 9；
Described slew gear includes Power Component and turning circle 91, and described platform 10 supports this turning circle 91 around its axis
Rotate, described Power Component provides, for described turning circle 91, the power rotating around its axis；
Described platform 10 has manhole in the middle part of octahedron and its, and the axis of described turning circle 91 is led to this circle
The axis in hole is conllinear, and the annular diameters of described turning circle 91 are more than the aperture of described manhole；
Outer wall around described turning circle 91 uniformly has tooth bar, and described Power Component includes motor 92 and gear 921, described
Gear 921 is engaged with the tooth bar on described turning circle 91, and this gear 921 is placed on the outer wall of described motor 92 output shaft.
Described drive mechanism includes front drive component, rear drive component and the side driving group being distributed on platform 10 side wall
Part, described front drive component and rear drive component are symmetrically set up, and described side drive component is located at front drive component and rear driving group
Between part, described front drive component includes first hydraulic cylinder 1 and second hydraulic cylinder 2, described first hydraulic cylinder 1 and second hydraulic cylinder
2 piston rod part is adjacent to be set up and all hinged with described platform 10, the bottom of described first hydraulic cylinder 1 and second hydraulic cylinder 2
All hinged with described testing stand 9, the axis angle of the piston rod of first hydraulic cylinder 1 and second hydraulic cylinder 2 is acute angle, described after
Drive component includes the 3rd hydraulic cylinder 3 and the 4th hydraulic cylinder 4, and the piston rod part phase of the 3rd hydraulic cylinder 3 and the 4th hydraulic cylinder 4
Neighbour sets up and hinged with described platform 10, and the bottom of the 3rd hydraulic cylinder 3 and the 4th hydraulic cylinder 4 is all hinged with described testing stand 9；
Described first hydraulic cylinder 1, second hydraulic cylinder 2, the 3rd hydraulic cylinder 3 and the 4th hydraulic cylinder 4 piston rod part all logical
Cross the side walls hinged of Hooke's hinge 12 and described platform 10, its bottom is all hinged with described testing stand 9 by ball pivot 11.
Described side drive component includes the first hinge 7 and the second hinge 8, and described first hinge 7 is placed in the second liquid
Between cylinder pressure 2 and the 3rd hydraulic cylinder 3, described second hinge 8 is placed between first hydraulic cylinder 1 and the 4th hydraulic cylinder 4, and first
The top of hinge 7 and the second hinge 8 is all hinged with platform 10, and its bottom is all hinged with testing stand 9；
Described first hinge 7 and the second hinge 8 all include hinge 83 and lower hinge 82, and described upper hinge 83
It is hinged with described platform 10 that Hooke's hinge 12 is passed through at top；
Hinge hanger on a pair, the top of described lower hinge are arranged with two side walls of the bottom of described upper hinge 82
With a pair symmetrical lower hinge hanger be equipped with the two of bottom side walls, a pair lower hinge hanger at the top of described lower hinge
Between formed rotation space, and this between lower hinge hanger supporting one in rotating shaft 84, the bottom of described upper hinge 83 is placed in this
In rotation space, through the through hole on upper hinge hanger, on this, hinge 83 passes through rotating shaft 84 in this for simultaneously described middle rotating shaft 84
Rotate with described lower hinge 82 and be connected；
A lower rotary shaft 821 is supported, described testing stand 9 is provided between the lower hinge hanger of a pair of described lower hinge 82 bottom
Connect hanger with this lower hinge hanger corresponding a pair, this lower hinge 82 bottom is hung by described lower rotary shaft 821 and described connection
Ear rotates and connects.
Described side drive component also include respectively with the first hinge 7 and corresponding 5th hydraulic cylinder 5 of the second hinge 8 and
6th hydraulic cylinder 6, the lower surface of the middle and upper part of described upper hinge 83 has a groove, and two internal groove side walls of this groove have one
To symmetrical installing hole, by this to rotating shaft 831 in installing hole supporting one, the upper hinge 83 in described first hinge 7 is passed through
The upper rotating shaft 831 installed thereon is hinged with the piston rod of the 5th hydraulic cylinder 5, and the upper hinge 83 in described second hinge 8 is passed through
The upper rotating shaft 831 installed thereon is hinged with the piston rod of the 6th hydraulic cylinder 6；Described 5th hydraulic cylinder 5 and the bottom of the 6th hydraulic cylinder 6
Portion is all hinged with described testing stand 9 by ball pivot 11.
The operation principle of the present embodiment:
Stress between each mechanism and running assembly and running orbit are as shown in figs. 4 through 10.
Now illustrate taking an instantaneous time point as a example:
When whole laboratory table has operated 1 second, the piston rod of first hydraulic cylinder 1 and second hydraulic cylinder 1 does and stretches out
Action and be in extreme position, the 3rd hydraulic cylinder 3 now and the piston rod of the 4th hydraulic cylinder 4 are in the extreme position of retraction,
Now platform 10 will swing, then towards the 3rd hydraulic cylinder 3 and the deflection of the 4th hydraulic cylinder 4 position, now flat
Platform 10 is not subject to moving of the 5th hydraulic cylinder 5 and the 6th hydraulic cylinder 6, and the Hooke's hinge 12 on the first hinge 7 and the second hinge 8
Also receive torsion；
And when the 5th hydraulic cylinder 5 gives 10 1 thrust of platform, the 6th hydraulic cylinder 6 is then mutually matched, to platform
10 offer pulling force, and first hydraulic cylinder 1 now all can produce the effect of a power to the 4th hydraulic cylinder 4 to platform 10.
While platform 10 waves, motor 92 band moving gear 921 rotates, and then stirs the turning circle 91 engaging,
The product of required test is fixed on turning circle 91 and rotates.
According to above-mentioned operation it is inferred that with first hydraulic cylinder 1 and second hydraulic cylinder 2 as front, and then can set
The orientation of x, y, z axle, the face that x-axis and z-axis are formed is front, is z-axis with horizontal plane, laterally for x-axis, platform 10
Be positive and negative 45 degree and its cycle to be the 3-10 second around the angle that x-axis rotates, and the angle that platform 10 rotates around y-axis for positive and negative 15 degree and
Its cycle is the 4-10 second, and platform 10 also can move up and down along z-axis, and slew gear can provide turning circle 91 to turn around z-axis simultaneously
Dynamic angle is positive and negative 10 degree and its cycle is the 4-10 second, and platform 10 also can do translational motion along x-axis, above whole rolling test
Platform can achieve the swing of five degree of freedom.
The range spacing of described first hydraulic cylinder 1 to the 4th hydraulic cylinder 4 is 2773.73mm, and waves maximal rate
For 1281mm/s, the 3rd hydraulic cylinder 3 and the 4th hydraulic cylinder 4 are 26.02 tons to the maximum force of platform 10, and the first hinge
The maximum weighted of 7 each rotating shaft is 28.8 tons, and each rotating shaft maximum weighted of the second hinge 8 is 33.97 tons, now the
The maximum weighted of five hydraulic cylinders 5 is 46 tons.
And when platform 10 moves to 5 seconds, reached the operational limitation of each hydraulic cylinder, the first hinge now
The stress in portion 7 is 38.86 tons, and the stress of the second hinge 8 now reduces, the stress of connected 6th hydraulic cylinder 6
Corresponding reduction.
Above the embodiment of the invention is described in detail, but described content has been only the preferable of the invention
Embodiment is it is impossible to be considered the practical range for limiting the invention.All impartial changes made according to the invention scope
Change and improve etc., all should still belong within this patent covering scope.
Claims (10)
1. a kind of wide-angle Swaying Test Platform it is characterised in that: include testing stand (9), platform (10), drive mechanism and turn-around machine
Structure；
Described platform (10) is located at the top of described testing stand (9), and described platform (10) has circle in the middle part of polyhedron and its
Through hole；
Described slew gear includes Power Component and turning circle (91), and described platform (10) supports this turning circle (91) around its axis
Line rotates, and described Power Component is that described turning circle (91) provides the power rotating around its axis；
Described drive mechanism includes front drive component, rear drive component and the side drive component being distributed on the wall of platform (10) side,
Described front drive component and rear drive component are symmetrically set up, described side drive component located at front drive component and rear drive component it
Between, described front drive component includes first hydraulic cylinder (1) and second hydraulic cylinder (2), described first hydraulic cylinder (1) and the second hydraulic pressure
The piston rod part of cylinder (2) is adjacent to be set up and all hinged with described platform (10), described first hydraulic cylinder (1) and second hydraulic cylinder
(2) bottom is all hinged with described testing stand (9), the axis wire clamp of the piston rod of first hydraulic cylinder (1) and second hydraulic cylinder (2)
Angle is acute angle, and described rear drive component includes the 3rd hydraulic cylinder (3) and the 4th hydraulic cylinder (4), and the 3rd hydraulic cylinder (3) and the 4th
The piston rod part of hydraulic cylinder (4) is adjacent to be set up and hinged with described platform (10), the 3rd hydraulic cylinder (3) and the 4th hydraulic cylinder
(4) bottom is all hinged with described testing stand (9), and described side drive component includes the first hinge (7) and the second hinge
(8), described first hinge (7) is placed between second hydraulic cylinder (2) and the 3rd hydraulic cylinder (3), and described second hinge (8) is put
Between first hydraulic cylinder (1) and the 4th hydraulic cylinder (4), and the top of the first hinge (7) and the second hinge (8) all with flat
Platform (10) is hinged, and its bottom is all hinged with testing stand (9).
2. a kind of wide-angle Swaying Test Platform according to claim 1 it is characterised in that: described first hydraulic cylinder (1),
The piston rod part of two hydraulic cylinders (2), the 3rd hydraulic cylinder (3) and the 4th hydraulic cylinder (4) is all flat with described by Hooke's hinge (12)
Platform (10) side walls hinged.
3. a kind of wide-angle Swaying Test Platform according to claim 1 and 2 it is characterised in that: described first hydraulic cylinder
(1), the bottom of second hydraulic cylinder (2), the 3rd hydraulic cylinder (3) and the 4th hydraulic cylinder (4) is all by ball pivot (11) and described test
Platform (9) is hinged.
4. a kind of wide-angle Swaying Test Platform according to claim 1 it is characterised in that: described platform (10) be polyhedron
And in the middle part of it, having manhole, the axis of described turning circle (91) is conllinear with the axis of this manhole, and described time
Turn-take (91) annular diameters be more than described manhole aperture.
5. a kind of wide-angle Swaying Test Platform according to claim 4 it is characterised in that: outer around described turning circle (91)
Wall uniformly has tooth bar, and described Power Component includes motor (92) and gear (921), described gear (921) and described turning circle
(91) the tooth bar engagement on, this gear (921) is placed on the outer wall of described motor (92) output shaft.
6. a kind of wide-angle Swaying Test Platform according to claim 1 it is characterised in that: described first hinge (7) and
Second hinge (8) all includes hinge (83) and lower hinge (82), and Hooke's hinge is passed through at the top of described upper hinge (83)
(12) hinged with described platform (10).
7. a kind of wide-angle Swaying Test Platform according to claim 6 it is characterised in that: the bottom of described upper hinge (83)
Two side walls on be arranged with hinge hanger on a pair, two side walls of the top of described lower hinge and bottom are equipped with one
To symmetrical lower hinge hanger, between a pair lower hinge hanger at the top of described lower hinge, form rotation space, and this under
Rotating shaft (84) in supporting one between hinge hanger, the bottom of described upper hinge (83) is placed in this rotation space, simultaneously described in
Through the through hole on upper hinge hanger, on this, hinge (83) passes through rotating shaft (84) and described lower hinge (82) in this for rotating shaft (84)
Rotate and connect.
8. a kind of wide-angle Swaying Test Platform according to claim 7 it is characterised in that: described lower hinge (82) bottom
A lower rotary shaft (821) is supported, described testing stand (9) is provided with and this lower hinge hanger corresponding between a pair lower hinge hanger
To connecting hanger, this lower hinge (82) bottom is passed through described lower rotary shaft (821) and is connected with described connection hanger rotation.
9. a kind of wide-angle Swaying Test Platform according to claim 6,7 or 8 it is characterised in that: described side drive component
Also include fiveth hydraulic cylinder (5) corresponding with the first hinge (7) and the second hinge (8) and the 6th hydraulic cylinder (6) respectively, institute
The lower surface stating the middle and upper part of hinge (83) has a groove, and two internal groove side walls of this groove have a pair symmetrical installation
Hole, by this to rotating shaft (831) in installing hole supporting one, the upper hinge (83) in described first hinge (7) is passed through to pacify thereon
The upper rotating shaft (831) of dress is hinged with the piston rod of the 5th hydraulic cylinder (5), and the upper hinge (83) in described second hinge (8) is led to
Cross the upper rotating shaft (831) installed thereon hinged with the piston rod of the 6th hydraulic cylinder (6).
10. a kind of wide-angle Swaying Test Platform according to claim 9 it is characterised in that: described 5th hydraulic cylinder (5) and
The bottom of the 6th hydraulic cylinder (6) is all hinged with described testing stand (9) by ball pivot (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848477.5A CN104596565B (en) | 2014-12-30 | 2014-12-30 | Large-angle swinging test table |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848477.5A CN104596565B (en) | 2014-12-30 | 2014-12-30 | Large-angle swinging test table |
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| Publication Number | Publication Date |
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| CN104596565A CN104596565A (en) | 2015-05-06 |
| CN104596565B true CN104596565B (en) | 2017-01-18 |
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| CN201410848477.5A Active CN104596565B (en) | 2014-12-30 | 2014-12-30 | Large-angle swinging test table |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106510260A (en) * | 2016-12-10 | 2017-03-22 | 宁秀芬 | Intelligent rocking chair |
| WO2018148917A1 (en) * | 2017-02-17 | 2018-08-23 | 苏州科爱佳自动化科技有限公司 | Aerospace-grade ball grid detection system |
| CN108286426B (en) * | 2017-12-18 | 2023-10-27 | 中国矿业大学 | Horizontal inclined hole inclinometry platform |
| CN109048808A (en) * | 2018-08-29 | 2018-12-21 | 江苏大学 | A kind of Three Degree Of Freedom waves turntable |
| CN112525451A (en) * | 2020-10-26 | 2021-03-19 | 中国人民解放军92942部队 | Multi-axis swinging and vibrating composite test platform |
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| CN102708723A (en) * | 2012-05-18 | 2012-10-03 | 燕山大学 | Six-freedom-degree static-balance parallel motion simulation platform with large bearing surface |
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| JP4120112B2 (en) * | 1999-09-29 | 2008-07-16 | 株式会社Ｉｈｉ | Segment positioning device |
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| CN102708723A (en) * | 2012-05-18 | 2012-10-03 | 燕山大学 | Six-freedom-degree static-balance parallel motion simulation platform with large bearing surface |
| CN103592095A (en) * | 2013-11-05 | 2014-02-19 | 燕山大学 | Two-rotation two-motion four-freedom-degree parallel excitation platform |
| CN104005902A (en) * | 2014-05-05 | 2014-08-27 | 上海交通大学 | Novel multi-dimensional parallel connecting swing wave power generation device |
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Denomination of invention: Large-angle swinging test table Effective date of registration: 20190925 Granted publication date: 20170118 Pledgee: Tianjin SME Credit Financing Guarantee Center Pledgor: Tianjin Fuyun Tianyi Technology Co., Ltd. Registration number: Y2019120000006 |
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Date of cancellation: 20220427 Granted publication date: 20170118 Pledgee: Tianjin SME Credit Financing Guarantee Center Pledgor: TIANJIN FUYUN TIANYI TECHNOLOGY Co.,Ltd. Registration number: Y2019120000006 |