CN107081713A - Press-loading device and press-loading apparatus - Google Patents
Press-loading device and press-loading apparatus Download PDFInfo
- Publication number
- CN107081713A CN107081713A CN201710482066.2A CN201710482066A CN107081713A CN 107081713 A CN107081713 A CN 107081713A CN 201710482066 A CN201710482066 A CN 201710482066A CN 107081713 A CN107081713 A CN 107081713A
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- China
- Prior art keywords
- press
- loading device
- tapered sleeve
- along
- pushing block
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/12—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same mounting or demounting piston rings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Abstract
It is easily damaged and cause the short technical problem of service life with the press-loading apparatus for solving correlation technique offer the invention discloses a kind of press-loading device and press-loading apparatus.The press-loading device includes propulsion assembly；The propulsion assembly includes at least two pushing blocks set gradually along same circumferencial direction, and at least two pushing block surrounds the spliced eye for the miner diameter end grafting with tapered sleeve；Also, at least two pushing block can be synchronous close or synchronous away from so that the aperture of the spliced eye and the external diameter of tapered sleeve match along the radial direction of the circumference.
Description
Technical field
The present invention relates to technology of pressure mounting field, more particularly to a kind of press-loading device and press-loading apparatus.
Background technology
Piston ring is the seal of hydraulic test, such as hydraulic jack, and piston ring is arranged between oil cylinder and piston rod and risen
Sealing function.The qualification rate direct correlation of the installation quality and hydraulic test of piston ring, the installation effectiveness of piston ring can direct shadow
Ring the production efficiency and maintenance cycle of hydraulic test.
Correlation technique provides a kind of press-loading apparatus, is promoted as shown in figure 1, the press-loading apparatus includes transition tapered sleeve 1, elasticity
Device 2 and centering spindle 3, wherein, the bigger diameter end of transition tapered sleeve 1 is used for grafting piston 5, and centering spindle 3 is plugged on the path of transition tapered sleeve 1
In end；Elastic propeller 2 is socketed in the outside of transition tapered sleeve 1 by the miner diameter end of transition tapered sleeve 1, and its import internal diameter is bored between transition
Between the big footpath of set 1 and path, the propulsion length of elastic propeller 2 is equal to the length of transition tapered sleeve 1.In use, by transition
The bigger diameter end of tapered sleeve 1 and the grafting of piston 5, make the bigger diameter end end face of transition tapered sleeve 1 reach at the groove 6 of piston 5, by piston ring 4
It is socketed in by the miner diameter end of transition tapered sleeve 1 on transition tapered sleeve 1, elastic propeller 2 is socketed in transition tapered sleeve 1 by centering spindle 3
On, and elastic propeller 2 is promoted by miner diameter end to the direction of bigger diameter end of transition tapered sleeve 1, under the promotion of elastic propeller 2,
Periphery of the piston ring 4 along transition tapered sleeve 1 is uniformly opened, while along the axial movement of tapered sleeve into groove 6.
Elastic propeller in the press-loading apparatus that above-mentioned correlation technique is provided is loop configuration, and transition tapered sleeve is rigid member,
Its periphery is taper, promotes elastic propeller along the axial direction of transition tapered sleeve, elastic propeller is deformed upon along its circumference, with continuous
Adapt to the outer peripheral face of tapered sleeve.Because elastic propeller is constantly deformed upon in progradation, cause propeller easily damaged, use
Short life.
The content of the invention
It is an object of the invention to provide a kind of press-loading device, with the press-loading apparatus that correlation technique offer is provided it is easily damaged and
Cause the technical problem that service life is short.
The present invention provides a kind of press-loading device, and the press-loading device includes propulsion assembly；The propulsion assembly is included along same
At least two pushing blocks that circumferencial direction is set gradually, at least two pushing block surrounds inserting for the miner diameter end grafting with tapered sleeve
Connect hole；Also,
At least two pushing block can be synchronous close or synchronous away from so that the spliced eye along the radial direction of the circumference
Aperture and the external diameter of tapered sleeve match.
Further, the propulsion assembly includes two pushing blocks, radial direction phase of two pushing blocks along the circumference
To setting.
Further, two pushing block elastic connections.
Further, in addition to connection component；The connection component include two columns, be connected to two columns it
Between elastic component；
Two columns and two pushing blocks are corresponded and set.
Further, including two connection components, two connection components are diametrically set along the circumference
Put.
Further, in addition to connection ring and guidance set；
The connection ring is coaxially disposed with the propulsion assembly；
The guidance set includes pilot hole and lead；The pilot hole is arranged on the pushing block and along the circumference
Radially extend；The first end of the lead is connected with the connection ring, the second end and the pilot hole of the lead
Grafting and it can be moved along the length direction of the pilot hole.
Further, the guidance set is two；Two guidance sets are corresponded with two pushing blocks and set
Put；
Second end of two leads in two guidance sets is connected with the connection ring.
Further, the guidance set is two；Length direction interval of two guidance sets along the pushing block
Set；
Second end of two leads in two guidance sets is connected with the connection ring.
Further, in addition to handle；The handle and the contiguous block are oppositely arranged on the both sides of the propulsion assembly；
Second end of the lead is connected through the pilot hole and with the handle.
The press-loading device that the present invention is provided, propulsion assembly therein includes at least two set gradually along same circumferencial direction
Individual pushing block, at least two pushing blocks surround the spliced eye for the miner diameter end grafting with tapered sleeve, and at least two pushing blocks can be along the circle
The radial direction in week is synchronous close or synchronous away from so that the aperture of spliced eye and the external diameter of tapered sleeve match.In use, by piston ring
It is socketed on the periphery of tapered sleeve, makes miner diameter end and the spliced eye grafting of tapered sleeve, make bigger diameter end and the piston rod grafting of tapered sleeve, and makes
Seal groove on piston rod is concordant with the bigger diameter end end face of tapered sleeve；It is propulsion side by miner diameter end to the direction of bigger diameter end of tapered sleeve
To promoting above-mentioned propulsion assembly along the direction of propulsion, it is synchronously remote to surround radial direction of each pushing block of spliced eye along tapered sleeve, grafting
The aperture in hole constantly becomes big, is adapted to the external diameter for the tapered sleeve for constantly becoming big, propulsion assembly constantly promotes the big of piston ring tapered sleeve
Footpath end is moved, and final piston ring departs from tapered sleeve and entered in seal groove.The press-loading apparatus provided compared to correlation technique, the present invention is carried
The press-loading device of confession is not deformed upon in propelling piston ring, and structure is reliable and durable, and its service life is high.
Another object of the present invention also resides in a kind of press-loading apparatus of offer, and the press-loading apparatus includes tapered sleeve and as described above
Press-loading device；
The spliced eye grafting of the tapered sleeve and the press-loading device.
Above-mentioned press-loading apparatus has compared with the above-mentioned press-loading device compared to the beneficial effect of prior art with prior art
Beneficial effect is identical, and here is omitted.
Brief description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the press-loading apparatus in correlation technique；
Fig. 2 is the structural representation of press-loading device according to embodiments of the present invention；
Fig. 3 is Fig. 2 sectional view；
Fig. 4 is the structural representation of pushing block according to embodiments of the present invention；
Fig. 5 is the structural representation of tapered sleeve according to embodiments of the present invention；
Fig. 6 is the schematic diagram of the use state of press-loading device according to embodiments of the present invention.
In figure：
10- propulsion assemblies；20- spliced eyes；
30- connection components；40- connection rings；
50- guidance sets；60- handles；
70- tapered sleeves；80- piston rods；
90- piston rings；11- pushing blocks；
31- columns；32- elastic components；
51- pilot holes；52- leads.
Embodiment
It should be noted that in the case where not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Fig. 2 is the structural representation of press-loading device according to embodiments of the present invention, and Fig. 3 is Fig. 2 sectional view, and Fig. 4 is root
According to the structural representation of the pushing block of the embodiment of the present invention, Fig. 5 is the structural representation of tapered sleeve according to embodiments of the present invention, Fig. 6
It is the schematic diagram of the use state of press-loading device according to embodiments of the present invention.
Reference picture 2 is to shown in Fig. 6, and the present embodiment provides a kind of press-loading device, and the press-loading device includes propulsion assembly 10, pushed away
Enter at least two pushing blocks 11 that component 10 includes setting gradually along same circumferencial direction, at least two pushing blocks 11, which are surrounded, to be used for and cone
The spliced eye 20 of the miner diameter end grafting of set 70；Also, at least two pushing blocks 11 can be circumferentially radial direction it is synchronous close to or it is synchronous
Away from so that the aperture of spliced eye 20 and the external diameter of tapered sleeve 70 match.
The present embodiment provide press-loading device, propulsion assembly 10 therein include along same circumferencial direction set gradually to
Few two pushing blocks 11, at least two pushing blocks 11 surround the spliced eye 20 for the miner diameter end grafting with tapered sleeve 70, and at least two push away
Block 11 can be synchronous close or synchronous away from so that the aperture of spliced eye 20 matches with the external diameter of tapered sleeve 70 along the radial direction of the circumference
It is suitable.Shown in reference picture 6, in use, piston ring 90 is socketed on the periphery of tapered sleeve 70, make the miner diameter end and spliced eye of tapered sleeve 70
20 grafting, make bigger diameter end and the grafting of piston rod 80 of tapered sleeve 70, and make the bigger diameter end of the seal groove and tapered sleeve 70 on piston rod 80
End face is concordant；It is direction of propulsion by miner diameter end to the direction of bigger diameter end of tapered sleeve 70, above-mentioned propulsion group is promoted along the direction of propulsion
Part 10, each radial direction of pushing block 11 along tapered sleeve 70 for surrounding spliced eye 20 is synchronously remote, and the aperture of spliced eye 20 constantly becomes big, fits
Should be in the external diameter for constantly becoming big tapered sleeve 70, propulsion assembly 10 constantly promotes piston ring 90 to be moved to the bigger diameter end of tapered sleeve 70, most
Whole piston ring 90 departs from tapered sleeve 70 and entered in seal groove.The press-loading apparatus provided compared to correlation technique, the pressure that the present invention is provided
Mounting mechanism is not deformed upon in propelling piston ring, and structure is reliable and durable, and its service life is high.
Preferably, in the present embodiment, propulsion assembly 10 includes two pushing blocks 11, radial direction of two pushing blocks 11 along same circumference
It is oppositely arranged, in other words, axial direction of two pushing blocks 11 along same circumference is set gradually, and can only be met using only two pushing blocks 11
It is required that, simplifying the structure for the press-loading device can be made.
In other embodiment, propulsion assembly 10 may include the pushing block 11, at least three or three of more than at least three or three
Pushing block 11 more than individual surrounds the spliced eye 20 for the miner diameter end grafting with tapered sleeve 70；Also, more than at least three or three
Pushing block 11 can along same circumference radial direction it is synchronous close to or it is synchronous away from so that spliced eye 20 aperture and tapered sleeve 70 it is outer
Footpath matches.Due to complicatedization of the press-loading device can be caused using the pushing block of more than at least three or three, therefore, this
In embodiment, preferably the press mounting structure includes two pushing blocks 11 being oppositely arranged, with the simplification of holding structure.
Further, two elastic connections of pushing block 11, two pushing blocks 11 can be close to each other or remote along the radial direction of same circumference
From, for example, two pushing blocks 11 can be connected by telescoping mechanism or flexible part, wherein, telescoping mechanism can be gas spring,
Elastomeric element can be spring or elastic band.
The press-loading device that the present embodiment is provided also includes connection component 30, and the connection component 30 includes two columns 31, connected
The elastic component 32 between two columns 31 is connected on, two columns 31 and two pushing blocks 11 are corresponded and set.Wherein, pushing block 11 is
Rectangle structure, the width of pushing block 11 is radially consistent with spliced eye 20, and two pushing blocks 11 are by respective width phase
Mutually close to each other or away from each other, column 31 is arranged on the side of the length direction of pushing block 11, and elastic component 32 is preferably ring junction
Structure, elastic component 32 is socketed in two columns 31. certainly, and elastic component 32 can also be single line, and the two ends of elastic component 32 are respectively with two
Individual column is tightened.
In other embodiment, connection component 30 may include two columns 31, two be separately positioned on two columns 31
The first thread segment and the second thread segment in opposite direction, two screwed holes and are provided with screwed hole, and screw rod, the screw rod
One thread segment and second end of thread correspond threaded connection, and two columns 31 and two pushing blocks 11 are corresponded and set.
Wherein, pushing block 11 is rectangle structure, the width of pushing block 11 and radially consistent, two pushing blocks of spliced eye 20
11 is close to each other each other or away from each other by respective width, and column 31 is arranged on the side of the length direction of pushing block 11；
When radial direction of two pushing blocks 11 along spliced eye 20 is close to each other or is located remotely from each other, due to the first thread segment and the second thread segment
Screw thread on the contrary, therefore, two pushing blocks 11 can lead-screw threadingly hole axial movement, still, due to this kind of connection component
Structure is more complicated, and preferably two columns 31 of the present embodiment are connected by elastic component 32.
Press-loading device includes two connection components, and the diametrically setting of two connection components 30 circumferentially is flat to improve
Weighing apparatus property and steadiness.Wherein, two columns 31, two edges of column 31 are provided with each pushing block 11 in two pushing blocks 11
The length direction of pushing block 11 is oppositely arranged.
Press-loading device also includes connection ring 40 and guidance set 50, and connection ring 40 is coaxially disposed with propulsion assembly 10, is oriented to
Component 50 includes pilot hole 51 and lead 52；Pilot hole 51 is arranged on radially extending on pushing block 11 and circumferentially；Lead
52 first end is connected with connection ring 40, the second end of lead 52 and the grafting of pilot hole 51 and can along pilot hole 51 length
Move in direction.
In the present embodiment, lead 52 is preferably bolt, and thickness direction of the bolt along connection ring 40 runs through connection ring 40,
The first end of the bolt is fixedly connected with connection ring 40, the second end of the bolt run through after connection ring 40 with the pilot hole on pushing block
51 grafting, because the thickness direction of connection ring 40 is the axial direction of propulsion assembly 10, therefore, the bolt can be to propulsion assembly 10
Axially position is carried out, makes multiple pushing blocks 11 along central axis while moving, it is to avoid axial deviation occur；Also, due to pilot hole
51 radially extending along pushing block 11, then bolt can be to its guide effect of pushing block 11, length direction of the pushing block 11 along pilot hole 51
Motion, keeps the synchronism and uniformity of multiple pushing blocks 11.
Preferably, in the present embodiment, guidance set 50 is two, and two guidance sets 50 are corresponded with two pushing blocks 11
Set, the second end of two leads 52 in two guidance sets 50 is connected with connection ring 40.Wherein, in two pushing blocks 11
Each pushing block 11 on be provided with two pilot holes 51, length direction of two pilot holes 51 along pushing block 11 is oppositely arranged,
Two leads 52 and two pilot holes 51 correspond grafting.
Further, for same pushing block 11, guidance set 50 is two, and two guidance sets 50 are along pushing block 11
Length direction is arranged at intervals, and the second end of two leads 52 in two guidance sets 50 is connected with connection ring 40.
In the present embodiment, a pilot hole 51 can be set on pushing block 11, the width of the pilot hole 51 along pushing block 11 prolongs
Stretch, the pilot hole 51 is located at the center of the length direction of pushing block 11, wherein one warp of the pilot hole 51 and spliced eye 20
It is completely superposed, this warp is the first warp.When the pilot hole on pushing block 11 is two, because the direction of motion of pushing block is slotting
The radial direction in hole 20 is connect, now, the bearing of trend of the pilot hole 51 on pushing block 11 is parallel with the bearing of trend of the first warp but does not weigh
Close.
In the present embodiment, guidance set 50 is that two are respectively set on four, each pushing block 11, and four guidance sets 50 are along even
The circumference for connecing ring 30 is arranged at intervals successively.
Press-loading device also includes handle 60, and handle 60 and connection ring 40 are oppositely arranged on the both sides of propulsion assembly 10, are oriented to
Second end of post 52 is connected through pilot hole 51 and with handle 60, wherein, handle 60 is tubular structure, and lead 52 is multiple
When, multiple leads are arranged at intervals successively along the circumference of handle 60, handle 60 is fixed relative to propulsion assembly 10, in order to push away
Dynamic propulsion assembly 10 is moved along direction of propulsion.
Another object of the present invention also resides in a kind of press-loading apparatus of offer, the press-loading apparatus press-fiting including tapered sleeve and as above
The spliced eye grafting of mechanism, tapered sleeve and press-loading device.
Above-mentioned press-loading apparatus has compared with the above-mentioned press-loading device compared to the beneficial effect of prior art with prior art
Beneficial effect is identical, and here is omitted.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. a kind of press-loading device, it is characterised in that including propulsion assembly (10)；The propulsion assembly (10) is included along same circumference
At least two pushing blocks (11) that direction is set gradually, at least two pushing block (11) is surrounded for the miner diameter end with tapered sleeve (70)
The spliced eye (20) of grafting；Also,
At least two pushing block (11) can be synchronous close or synchronous away from so that the spliced eye along the radial direction of the circumference
(20) external diameter in aperture and tapered sleeve (70) matches.
2. press-loading device according to claim 1, it is characterised in that the propulsion assembly (10) includes two pushing blocks
(11), diametrically setting of two pushing blocks (11) along the circumference.
3. press-loading device according to claim 2, it is characterised in that two pushing block (11) elastic connections.
4. press-loading device according to claim 3, it is characterised in that also including connection component (30)；The connection component
(30) two columns (31), the elastic component (32) being connected between two columns (31) are included；
Two columns (31) correspond with two pushing blocks (32) and set.
5. press-loading device according to claim 4, it is characterised in that including two connection components (30), two institutes
State diametrically setting of the connection component (30) along the circumference.
6. press-loading device according to claim 2, it is characterised in that also including connection ring (40) and guidance set (50)；
The connection ring (40) is coaxially disposed with the propulsion assembly (10)；
The guidance set (50) includes pilot hole (51) and lead (52)；The pilot hole (51) is arranged on the pushing block
(11) radially extending on and along the circumference；The first end of the lead (52) is connected with the connection ring (40), described
Second end of lead (52) and the pilot hole (51) grafting and it can be moved along the length direction of the pilot hole (51).
7. press-loading device according to claim 6, it is characterised in that the guidance set (50) is two；Described in two
Guidance set (50) is corresponded with two pushing blocks (11) and set；
Second end of two leads (52) in two guidance sets (50) is connected with the connection ring (40).
8. press-loading device according to claim 6, it is characterised in that the guidance set (50) is two；Described in two
Length direction of the guidance set (50) along the pushing block (11) is arranged at intervals；
Second end of two leads (52) in two guidance sets (50) is connected with the connection ring (40).
9. press-loading device according to claim 6, it is characterised in that also including handle (60)；The handle (60) and institute
State the both sides that contiguous block (40) is oppositely arranged on the propulsion assembly (10)；
Second end of the lead (52) is connected through the pilot hole (51) and with the handle (60).
10. a kind of press-loading apparatus, it is characterised in that press-fit including tapered sleeve (70) and as claimed in any one of claims 1-9 wherein
Mechanism；
The tapered sleeve (70) and spliced eye (20) grafting of the press-loading device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482066.2A CN107081713B (en) | 2017-06-22 | 2017-06-22 | Press-loading device and press-loading apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482066.2A CN107081713B (en) | 2017-06-22 | 2017-06-22 | Press-loading device and press-loading apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107081713A true CN107081713A (en) | 2017-08-22 |
| CN107081713B CN107081713B (en) | 2019-06-14 |
Family
ID=59606340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710482066.2A Active CN107081713B (en) | 2017-06-22 | 2017-06-22 | Press-loading device and press-loading apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107081713B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058231A (en) * | 2018-09-30 | 2018-12-21 | 杭州力龙液压有限公司 | Hydraulic motor braking moment test fixture and system |
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| CN102069465A (en) * | 2011-01-24 | 2011-05-25 | 国营红峰机械厂 | Installation tool of O-shaped ring |
| CN202640287U (en) * | 2012-05-31 | 2013-01-02 | 上海东方泵业(集团)有限公司 | Device for withdrawing bearing |
| CN203542518U (en) * | 2013-11-22 | 2014-04-16 | 山东钢之杰机电制造有限公司 | Oil cylinder piston DAS seal ring installation tool |
| FR2998500B1 (en) * | 2012-11-26 | 2014-12-12 | Peugeot Citroen Automobiles Sa | DEVICE FOR FACILITATING THE INTRODUCTION OF A PISTON WITH ITS SEGMENTS IN A CYLINDER OF A MOTOR VEHICLE |
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| CN204686814U (en) * | 2015-06-03 | 2015-10-07 | 湖南省映鸿科技有限公司 | A kind of cylinder outer sleeve dress pressure device |
| CN206883554U (en) * | 2017-06-22 | 2018-01-16 | 杭州力龙液压有限公司 | Press-loading device and press-loading apparatus |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069465A (en) * | 2011-01-24 | 2011-05-25 | 国营红峰机械厂 | Installation tool of O-shaped ring |
| CN202640287U (en) * | 2012-05-31 | 2013-01-02 | 上海东方泵业(集团)有限公司 | Device for withdrawing bearing |
| FR2998500B1 (en) * | 2012-11-26 | 2014-12-12 | Peugeot Citroen Automobiles Sa | DEVICE FOR FACILITATING THE INTRODUCTION OF A PISTON WITH ITS SEGMENTS IN A CYLINDER OF A MOTOR VEHICLE |
| CN203542518U (en) * | 2013-11-22 | 2014-04-16 | 山东钢之杰机电制造有限公司 | Oil cylinder piston DAS seal ring installation tool |
| CN204263093U (en) * | 2014-11-13 | 2015-04-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of erecting tools of sealing piston of hydraulic cylinder ring |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058231A (en) * | 2018-09-30 | 2018-12-21 | 杭州力龙液压有限公司 | Hydraulic motor braking moment test fixture and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107081713B (en) | 2019-06-14 |
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