CN209256588U - Clean type grinding machine process equipment - Google Patents
Clean type grinding machine process equipment Download PDFInfo
- Publication number
- CN209256588U CN209256588U CN201821947252.5U CN201821947252U CN209256588U CN 209256588 U CN209256588 U CN 209256588U CN 201821947252 U CN201821947252 U CN 201821947252U CN 209256588 U CN209256588 U CN 209256588U
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- Prior art keywords
- liquid
- workbench
- net
- grinding machine
- torsion shaft
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Abstract
The utility model discloses clean type grinding machine process equipments, belong to the technical field of mold processing, its key points of the technical solution are that including fuselage and workpiece polishing mechanism, the workbench for placing workpiece is provided on fuselage, the fuselage outer side is provided with liquid filtering apptss, the spray part to workpiece ejecting liquid is provided on fuselage, liquid-collecting hole is provided on workbench, it is connected between liquid-collecting hole and liquid filtering apptss and receives liquid channel, water plug is connected between liquid filtering apptss and spray part, anti-blocking plug assembly is provided between workbench and liquid-collecting hole, anti-blocking plug assembly includes the receipts liquid net covered at liquid-collecting hole, receiving surface of the liquid net far from liquid-collecting hole is continuing surface, it receives and is provided with overturning component between liquid net and workbench, the useless slot of receipts is provided on workbench, overturning component drives continuing surface to be located at for receiving the overturning of liquid net and receives right above useless slot, reach raising cooling The effect of liquid degree of purity.
Description
Technical field
The utility model relates to a kind of technical field of mold processing, in particular to a kind of clean type grinding machine process equipments.
Background technique
Grinding machine is the lathe for carrying out grinding to workpiece surface using grinding tool.Most of grinding machine is using high speed rotation
Grinding wheel carry out grinding, a small number of is processed using other grinding tools such as oilstone, abrasive band and free abrasive, such as honing
Machine, superfinisher, abrasive belt grinding machine, grinder and polishing machine etc..
Phenomena such as mold is widely used in metal plate and decoration industry, can generate abrasion due to the long-term use of mold, when
When cutting edge rust, then need to carry out reconditioning using grinding machine, in the prior art it is generally necessary to fill using chuck or special fixture
Clamp mould, when carrying out reconditioning to mold, usual reconditioning mold core, since mold core is smaller, clamping is more difficult, leads to flat stone mill bed body
Product is big.In order to solve the above-mentioned technical problem, people improve the prior art, it is existing can refer to application No. is
201210217590.4 Chinese patent, it discloses a kind of mold special purpose grinders, pass through its top mounting seat and folder
Tight device is provided with groove on pedestal and is equipped with the coolant liquid that cooling system extends between the column and clamping apparatus of groove
Pipe.
But in place of above-mentioned technical proposal Shortcomings, although being provided with cooling system, mold is beaten in grinding machine
The sundries such as clast can be generated during mill, if cooling liquid circulation uses, doping cutting sundries will affect grinding accuracy and light
Slippery, while the cooling effect of coolant liquid also will receive influence, and newly generated clast can not be made to clean out.
Utility model content
The purpose of this utility model is to provide a kind of clean type grinding machine process equipment, reaches and improve coolant liquid degree of purity
Effect.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of clean type grinding machine process equipment, including fuselage and workpiece polishing mechanism are provided with for placing workpiece on fuselage
Workbench, the fuselage outer side are provided with liquid filtering apptss, are provided with the spray part to workpiece ejecting liquid on fuselage, on workbench
It is provided with liquid-collecting hole, is connected between liquid-collecting hole and liquid filtering apptss and receives liquid channel, is connected with pumping between liquid filtering apptss and spray part
Water installations, are provided with anti-blocking plug assembly between workbench and liquid-collecting hole, anti-blocking plug assembly includes the receipts liquid covered at liquid-collecting hole
Net, receiving surface of the liquid net far from liquid-collecting hole is continuing surface, receives and is provided with overturning component between liquid net and workbench, sets on workbench
It is equipped with the useless slot of receipts, overturning component drives continuing surface to be located at for receiving the overturning of liquid net and receives right above useless slot.
By using above-mentioned technical proposal, workpiece is placed on the table, workpiece polishing mechanism alignment pieces are waited for into burnishing part
Surface, start clean type grinding machine process equipment, polish workpiece, it is continual to beating that part is sprayed in bruting process
Spraying cooling liquid at mill while coolant liquid plays cooling effect to burnishing part, takes away the clast that polishing is formed, is mixed with clast
The coolant liquid of sundries leaves table surface from liquid-collecting hole, receives liquid net and stops to the biggish clast sundries of volume size.Make
The accumulation that clast sundries is had after a period of time, at continuing surface causes the blocking for receiving liquid net, will at this time by overturning component
It receives liquid net to be overturn, be fallen in the useless slot of receipts so that receiving the sundries that liquid mesh belt moves on continuing surface, then will be received by overturning component
Liquid net is overturn to original position, i.e., continues to cover at liquid-collecting hole so that receiving liquid net, achieve the purpose that prevent liquid-collecting hole from blocking,
To guarantee that liquid filtering apptss have enough coolant liquids to be filtered.Coolant liquid enters liquid filtering apptss by receiving liquid channel, and coolant liquid exists
It is filtered at liquid filtering apptss.Coolant liquid in liquid filtering apptss is extracted and is conveyed to out spray part by water plug, again for spray part
It uses.Due to filtration of the coolant liquid through filtered fluid mechanism that reuses of spray part, clast sundries from coolant liquid
Middle removing effectively improves the degree of purity of coolant liquid.
The utility model is further arranged to: the overturning component includes the inversion boot being fixedly connected with workbench and turns
The dynamic torsion shaft being connected in inversion boot is provided with connecting rod, the axis of torsion shaft and inversion boot between torsion shaft and receipts liquid net
It is overlapped and horizontally disposed.
By using above-mentioned technical proposal, torsion shaft is rotated, torsion shaft, which is able to drive, receives the overturning of liquid net, torsion shaft rotation one
It 180 degree, enables to continuing surface upward to overturn 180 degree, so that accepting down, is deposited on continuing surface
Clast sundries is fallen in the useless slot of receipts.Torsion shaft and inversion boot cooperate so that the flip-flop movement for receiving liquid net is more smooth laborsaving.
The utility model is further arranged to: being provided with disassembly component between the connecting rod and receipts liquid net, is dismantled component
Including the stripper being fixedly connected with the connecting rod, demounting bolt is threaded between stripper and receipts liquid net.
By using above-mentioned technical proposal, after a period of use, receipts liquid net is damaged or some clast sundries are stuck in
Receiving liquid can not be such that it falls by way of stirring or shaking on the net, directly unscrew demounting bolt, will receive liquid net from connecting rod
On remove, liquid net will be received and replaced, avoid blocking, so that new receipts liquid net works on, reach and improve equipment and integrally make
With the effect in service life.
The utility model is further arranged to: the torsion shaft is fixedly connected with handle.
By using above-mentioned technical proposal, handle rotates torsion shaft to worker and provides the point of application, mobile by holding handle
Handle achievees the purpose that rotate torsion shaft, easy to use, convenient for operation.
The utility model is further arranged to: return unit is provided between the torsion shaft and workbench, return unit provides
Receipts liquid net is driven to be covered on the elastic force on liquid-collecting hole to torsion shaft.
By using above-mentioned technical proposal, after return unit is arranged, worker overcomes the elasticity of return unit by rotation torsion shaft
Power rotates torsion shaft, falls in the useless slot of receipts so that receiving the online clast sundries of liquid, return unit stores power at this time, works as worker
Let hand go, the elastic force of return unit rotates torsion shaft, receives liquid net to drive and returns to original position, continue for liquid-collecting hole into
Row covering, reaches convenient and efficient, labor-saving effect.Shorten and receive the time that liquid net leaves liquid-collecting hole, reduces liquid-collecting hole and do not having
There is the probability received and blocked in this period that liquid net blocks by clast sundries.
The utility model is further arranged to: the return unit is stretch cord, and stretch cord one end is fixedly connected with workbench,
The other end is fixedly connected with torsion shaft.
By using above-mentioned technical proposal, after torsion shaft rotation, the overall length side length of stretch cord generates accumulation of energy, when making
After the power disappearance for obtaining torsion shaft rotation, the storage power of stretch cord drives torsion shaft to rotate in the opposite direction, achievees the effect that reset.
Stretch cord has elastic force, and repeated multiple times can use, and is highly suitable for herein.
The utility model is further arranged to: the top for receiving useless slot is in open state.
By using above-mentioned technical proposal, so that clast sundries is easier to fall to the useless slot of receipts with the overturning for receiving liquid net
It is interior, it improves and receives useless efficiency, improve the cleannes of Workshop Production.
The utility model is further arranged to: the return unit is the torsional spring for being set in torsion shaft peripheral outer wall, inversion boot
The holding tank placed for torsional spring is inside offered, one end of torsional spring is fixedly connected with torsion shaft, and the other end is fixedly connected with inversion boot.
By using above-mentioned technical proposal, after torsion shaft rotation, torsional spring stores power, generates accumulation of energy, when rotating torsion shaft
Power disappear after, the storage power of torsional spring drives torsion shaft to rotate in the opposite direction, achievees the effect that reset.Torsional spring setting is accommodating
In slot, have the effect of protection, the sprays of reduction external impurities or coolant liquid as far as possible to the influence with torsional spring service life,
So that the reset effect of return unit is protected, the further service life for improving equipment reduces cost.
The utility model is further arranged to: the liquid filtering apptss include filtrate box, and partition, partition are provided in Rose Box
Rose Box is divided into the muddy liquid bath being disposed adjacent in horizontal direction and liquid tank, is offered at the top of partition by muddy liquid bath and liquid tank
The filtrate hole of connection.
By using above-mentioned technical proposal, filter plate plays the role of separating muddy liquid bath and liquid tank, clast sundries due to
Sole mass is heavier, can sink to the lower layer of coolant liquid, and by partition barrier in muddy liquid bath, limpid filtered fluid is flowed into clear by filtrate hole
In liquid bath, the size of filtrate hole can also stop a part of clast sundries, effectively be filtered to cutting fluid.
The utility model is further arranged to: being installed with several flexibilities at the filtrate hole and is blocked item.
By using above-mentioned technical proposal, part crumb powder can swim in cutting fluid upper layer since sole mass is lighter
Surface, flexibility are blocked item to blocking at filtrate hole, are blocked to part crumb powder, flexibility block item and filtrate hole it
Between gap and adjacent flexible block the gap between item and can enter liquid tank for coolant liquid, it is further to improve filter
Liquid effect further increases the degree of purity of coolant liquid.In conclusion the advantageous effects of the utility model are as follows:
1, reach anticlogging effect, improve filter effect, effectively improve the degree of purity of coolant liquid;
2, manpower is saved, is easy to use;
3, it improves service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the clean type grinding machine process equipment in the utility model embodiment one;
Fig. 2 is the partial enlargement diagram in Fig. 1 at A;
Fig. 3 is to overturn component in the utility model embodiment one to overturn receipts liquid net to signal when receiving right above on useless slot
Figure;
Fig. 4 is the partial enlargement diagram in Fig. 3 at B;
Fig. 5 is the partial enlargement diagram in Fig. 3 at C;
Fig. 6 is the partial sectional view in the utility model embodiment one in order to embody rotation axis and rotation nested structure;
Fig. 7 is the partial sectional view in the utility model embodiment two in order to embody torsional spring and receiving slot structure.
In figure, 1, fuselage;11, workbench;12, workpiece polishing mechanism;13, part is sprayed;14, useless slot is received;15, the first through slot;16,
Second through slot;17, boss;2, liquid filtering apptss;21, filtrate box;211, muddy liquid bath;212, liquid tank;22, partition;221, filtrate
Hole;222, flexibility blocks item;3, liquid-collecting hole;4, liquid channel is received;5, water plug;6, liquid net is received;61, continuing surface;7, inversion boot;
71, torsion shaft;72, handle;73, connecting rod;731, component is dismantled;7311, stripper;7312, demounting bolt;8, stretch cord;
9, torsional spring;91, holding tank.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment one:
Referring to Fig.1, it is a kind of clean type grinding machine process equipment disclosed by the utility model, including fuselage 1, is set on fuselage 1
It is equipped with the workbench 11 for placing workpiece and the workpiece polishing mechanism 12 for polishing workpiece, workpiece polishing mechanism 12 is located at work
Make 11 top of platform, workbench 11 is rectangle.It is provided on fuselage 1 for the spray part 13 to workpiece spraying cooling liquid.Spray
Part 13 is located at 12 side of workpiece polishing mechanism, is directed toward the workpiece for being located at 12 lower section of workpiece polishing mechanism.
As shown in figure 3, being provided with circular liquid-collecting hole 3 on workbench 11, it is sprayed at work pieces process and flow to workbench
The coolant liquid on 11 surfaces is fallen into liquid-collecting hole 3.Anti-blocking plug assembly, anti-blocking plug assembly are provided between workbench 11 and liquid-collecting hole 3
Receipts liquid net 6 including being covered on 3 top of liquid-collecting hole.
As shown in Fig. 2, the upper surface that the upper surface for receiving liquid net 6 flushed with the upper surface of workbench 11 and received liquid net 6 is to hold
Junction 61.Coolant liquid is adulterated clast sundries and is flowed at continuing surface 61, and the biggish clast sundries of volume size is by continuing surface 61
It accepts, coolant liquid is fallen into liquid-collecting hole 3 by receiving liquid net 6.
It is provided with overturning component between liquid net 6 and workbench 11 as shown in figure 4, receiving, the useless slot of receipts is provided on workbench 11
14, the side that useless slot 14 is located at workbench 11 is received, the top for receiving useless slot 14 is in open state.Overturn component for receive liquid net 6 overturning with
Continuing surface 61 is driven to protrude into the useless slot 14 of receipts.
In conjunction with Fig. 4 and Fig. 6, boss 17 is fixedly installed on workbench 11, overturning component includes that inversion boot 7 and rotation connect
The torsion shaft 71 in inversion boot 7 is connect, inversion boot 7 is fixedly connected on boss 17, and inversion boot 7 is realized and worked by boss 17
Platform 11 is fixedly connected.Torsion shaft 71 is overlapped and is horizontally disposed with the axis of inversion boot 7.Torsion shaft 71 is fixedly connected with handle
72。
Fig. 1 and Fig. 2 are reviewed, the connecting rod 73 of door shape, connecting rod 73 and receipts are provided between torsion shaft 71 and receipts liquid net 6
Disassembly component 731 is provided between liquid net 6, disassembly component 731 includes the stripper 7311 being fixedly connected with connecting rod 73, disassembly
Plate 7311 and receive liquid net 6 between be threaded with demounting bolt 7312, by demounting bolt 7312 can will receive liquid net 6 with connect
Plate, which is detachably fixed, to link together.
As shown in figure 4, being provided with return unit between torsion shaft 71 and workbench 11, return unit is supplied to the drive of torsion shaft 71
It receives liquid net 6 and is covered on the elastic force on liquid-collecting hole 3.Return unit in this embodiment is stretch cord 8,8 one end of stretch cord and work
Platform 11 is fixedly connected, and the other end is fixedly connected with connecting rod 73, since connecting rod 73 is fixedly connected with torsion shaft 71, so elastic force
Rope 8 also corresponds to be fixedly connected with torsion shaft 71.
As shown in figure 4, the edge of workbench 11 raises upward, certain collection is played to the coolant liquid on 11 surface of workbench
Effect.There is the first through slot 15 passed through for stretch cord 8 in 11 edge of workbench, also has confession in the edge of workbench 11
The second through slot 16 that connecting rod 73 passes through.
Liquid channel 4 is received as shown in figure 3, being communicated with below liquid-collecting hole 3,4 a part of liquid channel is received and is placed in 3 lower section of liquid-collecting hole
In fuselage 1, another part is exposed to 1 side of fuselage.Liquid filtering apptss 2 are connected by receiving liquid channel 4 in 1 side of fuselage.
In conjunction with Fig. 5, liquid filtering apptss 2 include filtrate box 21, and 21 top of filtrate box is opening-like.In filtrate box 21 vertically
It is provided with the partition 22 being fixedly connected with filtrate box 21, partition 22 every being in two independent compartments, divides 21 inner part of filtrate box
Muddy liquid bath 211 and liquid tank 212 that Wei be not adjacent in horizontal direction.Liquid channel 4 is received to protrude into muddy liquid bath 211.It is pushed up in partition 22
Portion offers filtrate hole 221, and filtrate hole 221 is through hole, and muddy liquid bath 211 is connected to liquid tank 212.At filtrate hole 221
It is fixedly installed several flexibilities and blocks item 222, flexibility, which is blocked, forms small gap between item 222 and filtrate hole 221, adjacent
Flexibility, which is blocked, also forms small gap between item 222, these gaps pass through for coolant liquid, and clast sundries is blocked in muddy liquid
In slot 211.It is connected with water plug 5 between filtrate box 21 and spray part 13, the lower end of water plug 5 extends to liquid tank 212
Bottom.Water plug 5 by the coolant liquid extraction in liquid tank 212 and returns to spray part 13 with pipeline, follows for spray part 13
Ring uses.
The implementation principle of the present embodiment are as follows: workpiece is placed on workbench 11,12 alignment pieces of workpiece polishing mechanism are waited beating
Surface at mill starts clean type grinding machine process equipment, polishes workpiece, and it is constant that part 13 is sprayed in bruting process
To burnishing part spraying cooling liquid, while coolant liquid plays cooling effect to burnishing part, take away polishing formed clast, mixing
There is the coolant liquid of clast sundries to leave 11 surface of workbench from liquid-collecting hole 3, receive liquid net 6 to the biggish clast sundries of volume size into
Row stops.After a period of use, the accumulation that clast sundries is had at continuing surface 61 causes the blocking for receiving liquid net 6, passes through at this time
Handle 72 rotates torsion shaft 71, will receive liquid net 6 and overturns, and drives the sundries on continuing surface 61 to fall to receipts so that receiving liquid net 6
In useless slot 14.After torsion shaft 71 rotates, the overall length side length of stretch cord 8 generates accumulation of energy, when the power for rotating torsion shaft 71
After disappearance, the storage power of stretch cord 8 drives torsion shaft 71 to rotate in the opposite direction, achievees the effect that reset, receives the overturning of liquid net 6 extremely
Original position continues to cover at liquid-collecting hole 3, achievees the purpose that prevent liquid-collecting hole 3 from blocking, to guarantee so that receiving liquid net 6
Liquid filtering apptss 2 have enough coolant liquids to be filtered.Coolant liquid enters muddy liquid bath 211 by receiving liquid channel 4, in muddy liquid bath 211
Inside relatively heavy clast sundries sinks to lower layer, and lighter clast sundries is stopped by flexible barrier piece, coolant liquid by filtrate hole 221 into
Enter liquid tank 212.Coolant liquid in liquid tank 212 is extracted and is conveyed to out spray part 13 by water plug 5, again for spray part 13
It uses.Due to filtration of the coolant liquid through filtered fluid mechanism that reuses of spray part 13, clast sundries from cooling
It is removed in liquid, effectively improves the degree of purity of coolant liquid.
Embodiment two:
With embodiment one the difference is that: refer to Fig. 7, return unit is the torsional spring for being set in 71 peripheral outer wall of torsion shaft
9, the holding tank 91 placed for torsional spring 9 is offered in inversion boot 7, one end of torsional spring 9 is fixedly connected with torsion shaft 71, the other end and
Inversion boot 7 is fixedly connected.Torsional spring 9 enables to torsion shaft 71 to have the effect of reset after rotation, while inversion boot 7 is external right
Torsional spring 9 plays a protective role, the sprays of reduction external impurities or coolant liquid as far as possible to the influence with 9 service life of torsional spring,
So that the reset effect of return unit is protected, the further service life for improving equipment reduces cost.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (10)
1. a kind of clean type grinding machine process equipment, including fuselage (1) and workpiece polishing mechanism (12), fuselage are provided on (1) for putting
Set the workbench (11) of workpiece, it is characterised in that: be provided with liquid filtering apptss (2) on the outside of the fuselage (1), fuselage is arranged on (1)
The spray part (13) of oriented workpiece ejecting liquid is provided with liquid-collecting hole (3) on workbench (11), liquid-collecting hole (3) and liquid filtering apptss
(2) it is connected between and receives liquid channel (4), be connected with water plug (5), workbench between liquid filtering apptss (2) and spray part (13)
(11) anti-blocking plug assembly is provided between liquid-collecting hole (3), anti-blocking plug assembly is included in the receipts liquid net covered at liquid-collecting hole (3)
(6), receiving the surface of liquid net (6) far from liquid-collecting hole (3) is continuing surface (61), receives and is provided between liquid net (6) and workbench (11)
Component is overturn, receipts are provided on workbench (11) and are given up slot (14), overturning component is for receiving liquid net (6) overturning to drive continuing surface (61)
Right above receipts useless slot (14).
2. clean type grinding machine process equipment according to claim 1, it is characterised in that: the overturning component includes and work
The inversion boot (7) and the torsion shaft (71) being rotatably connected in inversion boot (7) that platform (11) is fixedly connected, torsion shaft (71) and receipts
It is provided between liquid net (6) connecting rod (73), torsion shaft (71) is overlapped and is horizontally disposed with the axis of inversion boot (7).
3. clean type grinding machine process equipment according to claim 2, it is characterised in that: the connecting rod (73) and receipts liquid net
(6) disassembly component (731) is provided between, disassembly component (731) includes the stripper being fixedly connected with connecting rod (73)
(732), demounting bolt (733) are threaded between stripper (732) and receipts liquid net (6).
4. clean type grinding machine process equipment according to claim 2, it is characterised in that: the torsion shaft (71) is fixedly connected
There are handle (72).
5. clean type grinding machine process equipment according to claim 2, it is characterised in that: the torsion shaft (71) and workbench
(11) return unit is provided between, return unit is supplied to torsion shaft (71) and receipts liquid net (6) is driven to be covered on the bullet on liquid-collecting hole (3)
Property power.
6. clean type grinding machine process equipment according to claim 5, it is characterised in that: the return unit is stretch cord (8),
Stretch cord (8) one end is fixedly connected with workbench (11), and the other end is fixedly connected with torsion shaft (71).
7. clean type grinding machine process equipment according to claim 1, it is characterised in that: the top for receiving useless slot (14) is in
Open state.
8. clean type grinding machine process equipment according to claim 5, it is characterised in that: the return unit is to be set in overturning
The torsional spring (9) of axis (71) peripheral outer wall, inversion boot (7) is interior to offer the holding tank (91) placed for torsional spring (9), torsional spring (9)
One end is fixedly connected with torsion shaft (71), and the other end is fixedly connected with inversion boot (7).
9. clean type grinding machine process equipment according to claim 1, it is characterised in that: the liquid filtering apptss (2) include filter
Liquid case (21) is provided with partition (22) in Rose Box, and Rose Box is divided into the muddy liquid being disposed adjacent in horizontal direction by partition (22)
Slot (211) and liquid tank (212), partition (22) top offer the filtrate hole for being connected to muddy liquid bath (211) with liquid tank (212)
(221)。
10. clean type grinding machine process equipment according to claim 9, it is characterised in that: fixed at the filtrate hole (221)
There are several flexibilities to block item (222).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201821947252.5U CN209256588U (en) | 2018-11-23 | 2018-11-23 | Clean type grinding machine process equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201821947252.5U CN209256588U (en) | 2018-11-23 | 2018-11-23 | Clean type grinding machine process equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
CN209256588U true CN209256588U (en) | 2019-08-16 |
Family
ID=67564169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201821947252.5U Expired - Fee Related CN209256588U (en) | 2018-11-23 | 2018-11-23 | Clean type grinding machine process equipment |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN209256588U (en) |
-
2018
- 2018-11-23 CN CN201821947252.5U patent/CN209256588U/en not_active Expired - Fee Related
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190816 Termination date: 20211123 |
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