CN108161503B - Workpiece pressing mechanism for outer contour - Google Patents
Workpiece pressing mechanism for outer contour Download PDFInfo
- Publication number
- CN108161503B CN108161503B CN201711329964.0A CN201711329964A CN108161503B CN 108161503 B CN108161503 B CN 108161503B CN 201711329964 A CN201711329964 A CN 201711329964A CN 108161503 B CN108161503 B CN 108161503B
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- holes
- pressing
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- limiting
- plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/061—Work-clamping means adapted for holding a plurality of workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/069—Work-clamping means for pressing workpieces against a work-table
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a workpiece pressing mechanism for an outer contour, which comprises a carrier plate and two symmetrically arranged operation blocks, wherein a first through hole and a pressing block which are matched with a fastening bolt are arranged on the carrier plate; the support plate is also provided with a pressing plate, the pressing plate is provided with a plurality of accommodating through holes capable of accommodating pressing blocks along the height direction of the pressing plate, and the accommodating through holes are arranged in a matrix shape; a plurality of second through holes are formed in the side wall of the pressing plate; the buffer plate is located between the pressing plate and the carrier plate, a second limiting hole is formed in the buffer plate, and the second limiting hole is coaxial with the first through hole and the accommodating through hole. When the pressing block is positioned under the pressing plate, the limiting protrusion is positioned in the limiting groove, and when the pressing block is positioned above the workpiece, the movable limiting rod is moved, so that the limiting protrusion is separated from the limiting groove, and the pressing block is released.
Description
Technical Field
The invention relates to the field of machining, in particular to a workpiece pressing mechanism for an outer contour.
Background
When the existing workpiece with the center as the through hole is used for processing the outer contour, a pressing block and a screw are needed to compress the workpiece. For example, in order to facilitate installation of a workpiece or prevent a sharp corner from accidentally injuring a person, a chamfering process is added to the workpiece before shipment. When chamfering the outer periphery of the workpiece, only the middle position of the workpiece can be fixed. The existing workpiece fixing method is that a workpiece is placed on a carrier plate, then a fixing block is pressed on the workpiece, and then a bolt is screwed up and fixed through an electric wrench. And the workpieces can be fixed on the carrier plate one by repeating the previous actions when pressing one workpiece, so that the working efficiency is very low.
Therefore, how to provide a workpiece for pressing a through hole at the center can reduce the complicated operation actions, which is a problem to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a workpiece pressing mechanism for an outer contour, which can solve the problems that workpieces need to be pressed one by one and the working efficiency is very low in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: a workpiece pressing mechanism for an outer contour comprises a support plate, wherein a first through hole and a pressing block which are matched with a fastening bolt are arranged on the support plate, the workpiece pressing mechanism further comprises two symmetrically arranged operation blocks, a plurality of parallel movable limiting rods are arranged between the two operation blocks, limiting bulges are arranged on the side walls of the movable limiting rods, limiting grooves are formed in the pressing block, and when the limiting bulges are located in the limiting grooves, the movable limiting rods lift and place the pressing block;
the support plate is also provided with a pressing plate, the pressing plate is provided with a plurality of accommodating through holes capable of accommodating pressing blocks along the height direction of the pressing plate, and the accommodating through holes are arranged in a matrix shape; the side wall of the pressing plate is provided with a plurality of second through holes, the movable limiting rod penetrates through the second through holes to be connected with the operation block, the movable limiting rod can horizontally move in the second through holes, the second through holes are communicated with the accommodating through holes, the limiting protrusions are positioned on one side of the accommodating through holes communicated with the second through holes, the limiting grooves are close to one side of the accommodating through holes communicated with the second through holes and are matched with the limiting protrusions, and the first through holes and the accommodating through holes are coaxial;
the buffer plate is located between the pressing plate and the carrier plate, a second limiting hole is formed in the buffer plate, and the second limiting hole is coaxial with the first through hole and the accommodating through hole.
The further improved scheme in the technical scheme is as follows:
in the above scheme, the number of the second through holes is the same as the number of columns or rows of the accommodating through holes.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the workpiece pressing mechanism for the outer contour is characterized in that the side wall of the movable limiting rod is provided with a limiting bulge, the limiting bulge is matched with the pressing block, the pressing block is provided with a limiting groove, and the limiting bulge is positioned in the limiting groove so that the movable limiting rod can lift a plurality of pressing blocks simultaneously.
2. The workpiece pressing mechanism for the outer contour is provided with accommodating through holes which are arranged in a matrix mode in the height direction of a pressing plate, meanwhile, the side wall of the pressing plate is provided with a second through hole, and the accommodating through holes are communicated with the second through hole. Wear to be equipped with the activity gag lever post in the second through-hole, the activity gag lever post is located and holds through-hole and second through-hole one side and be provided with spacing arch, is provided with spacing recess on the briquetting and uses with spacing protruding cooperation, can mention a plurality of briquettings simultaneously and make a plurality of briquettings place simultaneously on the work piece, when the briquetting was located the pressure strip under, spacing arch was located spacing recess, when the briquetting was located the work piece top, remove the activity gag lever post, make spacing arch break away from with spacing recess, the briquetting was released.
3. The workpiece pressing mechanism for the outer contour can be structurally used for placing a plurality of pressing blocks at the same time, all the pressing plates can be separated from the pressing plate at one time through the mechanism, and meanwhile, all the pressing plates on the support plate can be clamped through the pressing plates, so that the problem that an operator needs to repeatedly place the pressing blocks on the support plate one by one is solved, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of a workpiece pressing mechanism for an outer contour provided by the invention;
FIG. 2 is a top view of a workpiece hold-down mechanism for an outer profile provided by the present invention;
FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 3I;
FIG. 5 is a sectional view taken along the direction of FIG. 2B-B;
FIG. 6 is a schematic structural view of a compression plate provided by the present invention;
FIG. 7 is a front view of the hold-down plate provided in FIG. 6;
FIG. 8 is a cross-sectional view of the hold-down plate provided in FIG. 7;
FIG. 9 is a schematic structural view of a movable stop lever according to the present invention;
FIG. 10 is a schematic structural diagram of a briquette provided by the present invention.
In the above drawings: 1. a carrier plate; 11. a first through hole; 2. fastening a bolt; 3. a compression plate; 31. an accommodating through-hole; 32. a second through hole; 33. a guide post; 4. briquetting; 41. a limiting groove; 42. a working part; 43. a contact portion; 44. a limiting part; 45. a third through hole; 5. a movable limiting rod; 51. a limiting bulge; 52. a first limit hole; 6. a limiting spring; 7. an operation block; 8. a buffer plate; 81. a second limiting hole.
Detailed Description
The invention is further described with reference to the following figures and examples:
example 1: referring to fig. 1-10, the jig includes a support plate 1, the support plate 1 is provided with a first through hole 11 matching with a fastening bolt 2, the support plate 1 is further provided with a pressing plate 3; the pressure strip 3 has seted up a plurality of holding through-holes 31 that can hold briquetting 4 along its direction of height, holding through-hole 31 arranges into the matrix shape, a plurality of second through-holes 32 have been seted up on the lateral wall of pressure strip 3, all wear to be equipped with movable gag lever post 5 in the second through-hole 32, but activity gag lever post 5 horizontal migration in second through-hole 32, wherein second through-hole 32 with hold through-hole 31 intercommunication, be provided with spacing arch 51 on the activity gag lever post 5 lateral wall, spacing arch 51 is located the one side of holding through-hole 31 with the intercommunication of second through-hole 32, briquetting 4 is close to the one side that holds through-hole 31 and second through-hole 32 intercommunication and is provided with spacing recess 41 and spacing arch 51 and mutually supports, first through-hole 11 is the same with the quantity that holds through-hole 31 with holding through-hole 31.
Each movable limiting rod 5 can be simultaneously clamped with a plurality of pressing blocks 4, so that the pressing blocks 4 can be simultaneously pressed on the carrier plate 1 by the structure. As shown in fig. 3 to 5, it should be noted that the second through hole 32 communicates with the closest receiving through hole 31, wherein the closest receiving through hole 31 refers to the receiving through hole 31 closest to the limiting projection 51 on the movable limiting rod 5 located in the second through hole 32 and is not communicated with other receiving through holes 31. As shown in fig. 8, the movable limiting rod 5 and the second through hole 32 have the same shape in this embodiment. The length of the limiting bulge is the same as that of the movable limiting rod 5.
When the pressing plate 3 is placed on the carrier plate 1, the first through hole and the receiving through hole 31 cannot be coaxial due to operational problems, and for this purpose, the bottom of the pressing plate 3 is further provided with a guide pillar 33, and the carrier plate 1 is provided with a guide hole (not shown) matching with the guide pillar 33. In the installation process, the support plate 1 and the pressing plate 3 can be installed only by inserting the guide post 33 into the guide hole. As shown in fig. 7, the guide posts 33 are symmetrically disposed at two ends of the bottom of the compacting plate, and the number is not less than two. The guide holes are symmetrically arranged at two ends of the top of the carrier plate 1.
The number of the second through holes 32 is the same as the number of columns or rows of the accommodating through holes 31. The number of rows of the second through holes 32 and the accommodating through holes 31 is the same in this embodiment. This ensures that the maximum number of movable limiting rods 5 can be placed simultaneously on the carrier plate 1.
In order to solve the problem that the movable limiting rod 5 can move horizontally in the process of moving along with the pressing plate 3, a limiting spring 6 is further arranged in the second through hole 32 in the embodiment. As shown in fig. 3 and 9, a first limiting hole 52 capable of accommodating the limiting spring 6 is further formed in the side wall of the movable limiting rod 5 contacting the limiting spring 6, one end of the limiting spring 6 abuts against the pressure plate 3, and the other end of the limiting spring abuts against the bottom wall of the first limiting hole 52. Meanwhile, the working state and the non-working state of the limiting spring 6 are both in a compressed state. The number of the first limiting holes 52 is the same as that of the limiting springs 6, and the number of the first limiting holes 52 is the same as that of the first through holes 11 and the accommodating through holes 31.
In order to save the time for releasing the pressing block 4, in this embodiment, both ends of the movable limiting rod 5 penetrate through the second through hole 32, and both ends of the movable limiting rod 5 are fixedly connected with the operation block 7. The plurality of movable limiting rods 5 move along with the operation block 7, and the function that the pressing block 4 is released simultaneously can be realized.
In this embodiment, the buffer board 8 is further included, as shown in fig. 3-5, the buffer board 8 is located between the pressing board 3 and the carrier board 1, and the buffer board 8 is provided with a second limiting hole 81, and the second limiting hole 81 is coaxial with the first through hole 11 and the accommodating through hole 31. The purpose of the buffer plate 8 is to prevent the workpiece from being damaged due to the large impact force of the pressing plate 3 when the pressing plate 3 is not lightly placed.
In the present embodiment, the pressing block 4 includes a working portion 42 extending into the accommodating through hole 31 and a contact portion 43 contacting with the carrier plate 1, as shown in fig. 10, a limiting portion 44 is further disposed between the working portion 42 and the contact portion 43, and a diameter of the limiting portion 44 is larger than diameters of the working portion 42 and the contact portion 43. Meanwhile, the pressing block 4 is provided with a third through hole 45 which can pass through the fastening screw 2 along the axial direction. The side of the pressure strip 3 contacting the carrier plate 1 is further provided with a counter bore, and the specific position of the counter bore is located at one end of the accommodating through hole 31 close to the carrier plate 1.
In order to place the contact portion 43 of the pressure block 4 in the second stopper hole 81 during mounting, the diameter of the second stopper hole 81 is equal to or larger than the diameter of the contact portion 43.
Handles are arranged on two sides of the pressing plate 3 which are not provided with the operation block 7, and the side wall of the carrier plate 1 is also provided with the handles. The structure is convenient for operators to carry the pressing plate 3 or the carrier plate 1.
The use method of the workpiece pressing mechanism for the outer contour comprises the following steps:
firstly, a workpiece is placed on the carrier plate 1, and the workpiece is located right above the first through hole 11. Moving the operating block 7 towards the compression direction of the limiting spring 6, placing the pressing block 4 in the accommodating through hole 31, and then loosening the operating block 7 to enable the movable limiting rod 5 to tightly clamp the pressing block 4; then the guide post 33 on the pressing plate 3 is inserted into the guide hole on the carrier plate 1, when the guide post 33 is completely inserted into the guide hole, the operation block 7 is moved to the compression direction of the limit spring 6 again, the pressing block 4 is released, then the pressing plate 3 is lifted, the pressing block 4 is separated from the accommodating through hole 31, the workpiece is pressed, then the fastening bolt 2 is driven into the pressing block 4 and the carrier plate 1 through the electric wrench, and the workpiece clamping is completed at the moment.
After the chamfering of the workpiece is finished, the fastening bolt 2 is drilled out, the actions are repeated, attention is paid to the fact that no pressing block 4 exists on the pressing plate 3, the guide pillar 3 is matched with the guide hole, all the pressing blocks are clamped tightly by the movable limiting rod 5 and then lifted, and the pressing block 4 is separated from the workpiece. At this time, the chamfering process of the workpiece is completed.
Of course, in other embodiments, the workpiece pressing mechanism for the outer contour includes two symmetrically arranged operation blocks 7, a plurality of movable limiting rods 5 are arranged between the two operation blocks 7, a limiting protrusion 51 is arranged on a side wall of each movable limiting rod 5, the limiting protrusion 51 is matched with the pressing block 4, a limiting groove 41 is arranged on the pressing block 4, and the limiting protrusion 51 is located in the limiting groove 41 to enable the movable limiting rods 5 to lift the pressing block 4. That is to say that the pressure strip 3 is not present in the other embodiments. The lifting and placing limiting bulge of the pressing block plays a main role. Meanwhile, guide pillars are required to be arranged on two sides of the operation block 7, and the support plate 1 is provided with guide holes for the guide pillars of the operation block 7.
According to the invention, the workpiece pressing mechanism for the outer contour can be used for fixing a workpiece needing chamfering, and the jig can be used for processing workpieces with through holes at the centers.
When the workpiece pressing mechanism for the outer contour is adopted, the side wall of the movable limiting rod is provided with a limiting bulge, the limiting bulge is matched with the pressing block, the pressing block is provided with a limiting groove, and the limiting bulge is positioned in the limiting groove so that the movable limiting rod can lift a plurality of pressing blocks simultaneously; secondly, it is provided with the holding through-hole that is the matrix arrangement in the direction of pressure strip height, and the pressure strip lateral wall sets up the second through-hole simultaneously, holds through-hole and second through-hole intercommunication. Wear to be equipped with movable gag lever post in the second through-hole, activity gag lever post is located and holds through-hole and second through-hole one side and be provided with spacing arch, is provided with spacing recess on the briquetting and uses with spacing protruding cooperation, can mention a plurality of briquettings simultaneously and make a plurality of briquettings place simultaneously on the work piece, and when the briquetting was located the clamp plate under, spacing arch was located spacing recess. When the pressing block is positioned above the workpiece, the movable limiting rod is moved to separate the limiting protrusion from the limiting groove, and the pressing block is released; and a plurality of pressing blocks can be placed simultaneously by the structure, all the pressing plates and the pressing plate can be separated once by the mechanism, and meanwhile, all the pressing plates on the support plate can be pressed into the pressing plate through the pressing plate, so that the problem that an operator needs to repeatedly move the pressing blocks one by one on the support plate is solved, and the production efficiency is improved.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (2)
1. A workpiece pressing mechanism for an outer contour comprises a carrier plate 1, wherein a first through hole (11) and a pressing block (4) which are matched with a fastening bolt (2) are formed in the carrier plate 1, and the workpiece pressing mechanism is characterized by further comprising two symmetrically arranged operation blocks (7), a plurality of parallel movable limiting rods (5) are arranged between the two operation blocks (7), limiting bulges (51) are arranged on the side walls of the movable limiting rods (5), limiting grooves (41) are formed in the pressing block (4), and when the limiting bulges (51) are located in the limiting grooves (41), the movable limiting rods (5) lift and place the pressing block (4);
the support plate (1) is further provided with a pressing plate (3), the pressing plate (3) is provided with a plurality of accommodating through holes (31) capable of accommodating pressing blocks (4) along the height direction of the pressing plate, and the accommodating through holes (31) are arranged in a matrix shape; a plurality of second through holes (32) are formed in the side wall of the pressing plate (3), the movable limiting rod (5) penetrates through the second through holes (32) to be connected with the operation block (7), the movable limiting rod (5) can horizontally move in the second through holes (32), the second through holes (32) are communicated with the accommodating through holes (31), the limiting protrusions (51) are located on one side where the accommodating through holes (31) are communicated with the second through holes (32), the limiting grooves (41) are close to one side where the accommodating through holes (31) are communicated with the second through holes (32) and are matched with the limiting protrusions (51), and the first through holes (11) are coaxial with the accommodating through holes (31);
still include buffer board (8), buffer board (8) are located pinch-off plate (3) with between support plate (1), just spacing hole of second (81) has been seted up on buffer board (8), spacing hole of second (81) with first through-hole (11), hold through-hole (31) are coaxial.
2. Workpiece pressing mechanism for outer contours according to claim 1, characterized in that the number of second through-holes (32) is the same as the number of columns or rows of receiving through-holes (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711329964.0A CN108161503B (en) | 2016-06-01 | 2016-06-01 | Workpiece pressing mechanism for outer contour |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711329964.0A CN108161503B (en) | 2016-06-01 | 2016-06-01 | Workpiece pressing mechanism for outer contour |
| CN201610380555.2A CN105855946B (en) | 2016-06-01 | 2016-06-01 | A kind of fixed jig |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610380555.2A Division CN105855946B (en) | 2016-06-01 | 2016-06-01 | A kind of fixed jig |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108161503A CN108161503A (en) | 2018-06-15 |
| CN108161503B true CN108161503B (en) | 2019-12-24 |
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711332800.3A Active CN108145479B (en) | 2016-06-01 | 2016-06-01 | Fixed fixture for card engaging workpiece |
| CN201711329964.0A Active CN108161503B (en) | 2016-06-01 | 2016-06-01 | Workpiece pressing mechanism for outer contour |
| CN201610380555.2A Active CN105855946B (en) | 2016-06-01 | 2016-06-01 | A kind of fixed jig |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711332800.3A Active CN108145479B (en) | 2016-06-01 | 2016-06-01 | Fixed fixture for card engaging workpiece |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610380555.2A Active CN105855946B (en) | 2016-06-01 | 2016-06-01 | A kind of fixed jig |
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| CN (3) | CN108145479B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108356625A (en) * | 2018-01-31 | 2018-08-03 | 江门市菲芃格林齿轮有限公司 | A kind of internal tooth part plain grinding tooling of stabilization |
| CN109166464B (en) * | 2018-11-07 | 2021-07-23 | 惠科股份有限公司 | Fixing jig, display device production process and display device |
| CN109909857B (en) * | 2019-03-06 | 2021-07-20 | 南京师范大学 | Full-automatic multi-working electrode polishing device |
| CN110216605A (en) * | 2019-05-21 | 2019-09-10 | 深圳市宏普欣电子科技有限公司 | A kind of universal jig |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105855946B (en) | 2018-01-05 |
| CN108145479B (en) | 2019-11-22 |
| CN105855946A (en) | 2016-08-17 |
| CN108161503A (en) | 2018-06-15 |
| CN108145479A (en) | 2018-06-12 |
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