CN208135736U - It is a kind of convenient for adjust to positive nose suspension type traction electric machine stator turnover device - Google Patents
It is a kind of convenient for adjust to positive nose suspension type traction electric machine stator turnover device Download PDFInfo
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- CN208135736U CN208135736U CN201820605069.0U CN201820605069U CN208135736U CN 208135736 U CN208135736 U CN 208135736U CN 201820605069 U CN201820605069 U CN 201820605069U CN 208135736 U CN208135736 U CN 208135736U
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- electric machine
- seat board
- traction electric
- machine stator
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Abstract
The utility model discloses a kind of convenient for adjusting to positive nose suspension type traction electric machine stator turnover device.It includes pedestal, it is fixed on the upside of in pedestal that there are two sunpenders, thereafter upside is hinged with first hydraulic cylinder, connecting rod is fixed between two sunpender upper ends, first bearing there are two being set in the connecting rod, the outer ring of the first bearing is connected with the first seat board, and the piston rod front end of the first hydraulic cylinder is hinged on the back side of first seat board, and first seat board lower end is vertically fixedly connected with the second seat board.The utility model overturns the rotation of the first seat board by traction electric machine stator by hydraulic cylinder extension, strut and cooling air holes can be made to just by the left-right position of rotation turntable and regulating orifice plate, convenient for being inserted into strut in cooling air holes, strut limits traction electric machine stator when overturning, stator winding will not be caused to damage, overturning back stay, which becomes stabilizer blade, can be directly placed at working region, convenient for the operation such as the cleaning, drying and dipping lacquer in later period.
Description
Technical field
The present invention relates to Transit Equipments to overhaul field, and in particular to a kind of to draw electricity to positive nose suspension type convenient for adjusting
Machine stator turnover device.
Background technique
Traction electric machine is the driving equipment on subway, be directly related to subway can normally travel, traction electric machine is frame
It repairs or the important maintenance component of overhaul.It is sealed by oil baffle with bearing cap inside and outside bearing, due to oil baffle
It is fixed on axis, bearing cap is fixed on end cap, and traction electric machine not may occur in which between bearing cap and oil baffle in the process of running
Friction, so there is fit clearance between the two in designing for manufacturing, in the process of running, the oil discharge outlet on end cap is often
Pollution occur causes the lubricating grease of oral area to harden, and extra or liquefied lubricating grease cannot be discharged from oil discharge outlet in time, at this time will
Be discharged between bearing cap and end cap or between bearing cap and deflector, into inside traction electric machine, thus to stator around
Group is polluted, in maintenance process, need by the lubricating grease on stator winding it is clean after just can be carried out dipping lacquer operation.By
It is closer from the bottom surface of stator in stator winding bottom side, the lubricating grease at this be difficult to it is clean, so preferably traction electric machine is determined
Son overturning is vertical state, and is conducive to the drying after cleaning and operates with dipping lacquer.
Summary of the invention
The purpose of the present invention is in view of the deficienciess of the prior art, providing a kind of convenient for adjusting to positive nose suspension type traction
Motor stator turnover device.
To achieve the above object, dress is overturn to positive nose suspension type traction electric machine stator convenient for adjusting the present invention provides a kind of
It sets, including pedestal, there are two sunpenders for upside fixation in the pedestal, and upside is hinged with first hydraulic cylinder, two sunpender upper ends thereafter
Between be fixed with connecting rod, set in the connecting rod there are two first bearing, the outer ring of the first bearing is connected with First
Plate, the piston rod front end of the first hydraulic cylinder are hinged on the back side of first seat board, and first seat board lower end is vertically solid
Surely it is connected with the second seat board, an orifice plate is provided on second seat board, multiple holes, each hole interpolation are provided on the orifice plate
There is a strut, the middle part periphery of the strut protrudes to form limiting section, and the diameter of the limiting section is greater than traction electric machine to be flipped
The cooling air holes of stator and the internal diameter in the hole, and the diameter of the strut on the outside of it is less than the internal diameter of the cooling air holes, it is described
First seat board is equipped with a slide plate, the slide plate can be moved up in the first seat board it is dynamic, with far from or close to second seat board, and make
The strut is inserted into the cooling air holes or therefrom extracts out, and the end face of the traction electric machine stator is abutted with the limiting section
Afterwards, winding and the orifice plate are equipped with distance, and the slide plate is equipped with a groove, is equipped with bearing block, the axis in the groove
It holds and is equipped with second bearing in seat, be equipped with a shaft in the second bearing, the shaft upper end is fixed with a turntable.
Preferably, outside is fixed with stabiliser bar in the middle part of the sunpender, the stabiliser bar includes two, is symmetrically obliquely installed
In the two sides of the sunpender.
Preferably, the first bearing bearing is cylinder roller bearing, the second bearing is tapered roller bearing.
Preferably, being uniformly provided with multiple stabilizer blades on the downside of the turntable, first idler wheel, institute are equipped on the downside of each stabilizer blade
The rolling of the first idler wheel is stated to be connected on the upside of the bottom portion of groove.
Preferably, the side that connect with the second seat board of the orifice plate is equipped at least sliding rail together, on second seat board
Sliding slot is opened up with sliding rail corresponding position, the sliding rail is slidably connected in the sliding slot, and second of the sliding rail at least side
A nut is fixed on plate, the nut thread is connected with an adjusting rod, and the adjusting rod outer end is equipped with adjusting handle.
Preferably, being equipped with mounting groove on the upside of first seat board, the slide plate is arranged in the mounting groove, the cunning
Board bottom portion is uniformly provided with multiple second idler wheels, and the second idler wheel rolling is connected on the upside of the installation trench bottom.
Preferably, the mounting groove both sides are equipped with limiting slot, the slide plate two sides are equipped with retention bead, the limit
Protrusion is slidably connected in the limiting slot.
Preferably, being additionally provided with second hydraulic cylinder, the piston rod outer end of the second hydraulic cylinder on the upside of first seat board
It is connect with the slide plate.
Preferably, the upper end of the strut offers external thread structure, and it is threaded with lifting lug.
Preferably, the hole is 4 or 6.
Beneficial effect：The present invention overturns the rotation of the first seat board by traction electric machine stator by hydraulic cylinder extension, leads to
The left-right position for crossing rotation turntable and regulating orifice plate can make strut and cooling air holes to just, convenient for making strut be inserted into cooling air holes
Interior, strut limits traction electric machine stator when overturning, will not cause to damage to stator winding, and overturning back stay becomes stabilizer blade
It can be directly placed at working region, convenient for the operation such as the cleaning, drying and dipping lacquer in later period.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of traction electric machine in the prior art；
Fig. 2 is the structural representation convenient for adjusting to positive nose suspension type traction electric machine stator turnover device of the embodiment of the present invention
Figure；
Fig. 3 is the structural schematic diagram that the strut of the embodiment of the present invention is inserted into after cooling air holes；
Fig. 4 is the embodiment of the present invention convenient for adjusting to showing after positive nose suspension type traction electric machine stator turnover device overturning
It is intended to；
Fig. 5 is the left view of Fig. 4；
Fig. 6 is the turntable, slide plate and the second seat board attachment structure schematic diagram of the embodiment of the present invention；
Fig. 7 is the orifice plate of the embodiment of the present invention and the connection schematic diagram of the first seat board；
Fig. 8 is the left view of Fig. 7.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, and the present embodiment is with technical solution of the present invention
Premised under implemented, it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
Existing traction electric machine is that multiple cooling air holes are provided on stator body a bit, as shown in Figure 1, it is A Ersi
Air is blown into cooling wind from rear end by the cooling fan of the structural schematic diagram of the traction electric machine of logical model 4LCA2138, rear end
Hole, and be discharged from drive end bearing bracket, traction electric machine is cooled down with this, the present invention is exactly to be used to such be equipped on stator
The traction electric machine of cooling air holes.
As shown in Fig. 2 to 8, positive nose suspension type traction electric machine stator is turned over convenient for adjusting the embodiment of the invention provides a kind of
Rotary device, the turnover device include pedestal 31, fixed there are two sunpender 32 in the middle upside of pedestal 31, due to this turnover device compared with
Height opens up slot on the ground, and the part of pedestal 31 and sunpender 32 is arranged in the slot of below ground, easily facilitates operation.?
The rear upside of pedestal 31 is hinged with first hydraulic cylinder 33, and connecting rod 34 is fixed between the upper end of two sunpenders 32, is connecting
First bearing 35 is installed on bar 34, first bearing 35 is preferably two, in order to ensure the bearing capacity of two first bearings 35,
Two first bearings 35 preferably all use cylinder roller bearing.Two first bearings 35 are symmetrically installed in connecting rod 34, the
The outer ring of one bearing 35 is fixedly connected with the first seat board 1, and the front end of the piston rod 331 of first hydraulic cylinder 33 is hinged on the first seat board
1 back side, in this way, control piston rod 331 stretches in first hydraulic cylinder 33, so that it may so that First plate 1 is around 34 turns of connecting rod
It is dynamic, traction electric machine stator 6 is overturn to realize.It is vertically fixedly connected with the second seat board 2 in the lower end of the first seat board 1,
First seat board 1 and the L-shape setting of the second seat board 2.It is provided with an orifice plate 3 on second seat board 2, is provided with multiple holes on the aperture plate 3
4, the distribution in hole 4 is identical as the distribution of cooling air holes 61 on traction electric machine stator 6 to be flipped, including upper and lower two groups, every group
In arc-shaped.A strut 5 is inserted in each hole 4, the middle part periphery of strut 5 protrudes to form limiting section 51.In order to meet limiting section
The diameter of 51 limit function, limiting section 51 is greater than the cooling air holes 61 of traction electric machine stator 6 to be flipped and the internal diameter in hole 4.For
Strut 5 is set to be inserted into cooling air holes 61, the diameter of the strut 5 in 51 outside of limiting section is less than the internal diameter of cooling air holes 61.
A slide plate 7 is equipped on the first seat board 1, slide plate 7 can move on the first seat board 1, with far from or close to second
Seat board 2, when slide plate 7 moves right close to the second seat board 2, strut 5 ready for insertion into cooling air holes 61, slide plate 7 to the left
When moving away from the second seat board 2, strut 5 is just extracted out out of cooling air holes 61.In the right end face 62 and limit of traction electric machine stator 6
Position portion 51 abut after, stator winding 63 cannot be contacted with orifice plate 3, should there are a certain distance, otherwise will cause stator winding 63
Damage deformation.The length of limiting section 51 can be set greater than to the distance of stator winding 63 to stator right end face 62, it can also
The slot that can accommodate stator winding 63 is opened up with the middle part in orifice plate 3, is contacted to avoid stator winding 63 with orifice plate 3.
In order to improve stability, stabiliser bar 36, each 32 middle part of sunpender are respectively fixed on the outside of two 32 middle parts of sunpender
The fixed stabiliser bar 36 in outside is preferably two, and two stabiliser bars 36 are symmetrically inclined at the two sides of sunpender 32.In this way, passing through
Four stabiliser bars 36 can make two sunpenders 32, and all around directional stability improves.
For the ease of adjusting traction electric machine stator 6 with orifice plate 3 to positive-angle, as shown in fig. 6, being equipped with one on slide plate 2
Groove 16, groove 16 is preferably circular, is equipped with bearing block 17 at the interior middle part of groove 16, is equipped with second bearing in bearing block 17
18, since second bearing 18 needs to bear biggish vertical active force, second bearing 18 has choosing using tapered roller bearing.
There is a shaft 19 in 18 inner ring of second bearing, is fixed with a turntable 20 in the upper end of shaft 19.Turntable 20 is preferably also circle,
Radius is slightly less than the radius of groove 16, is in this way that traction electric machine stator 6 is adjusted with orifice plate 3 to positive angle by adjusting turntable 20
Degree, convenient for when slide plate 7 is mobile, strut 5 is inserted into cooling air holes 61.In order to improve stability when turntable 20 rotates, turn
It is uniformly provided with multiple stabilizer blades 21 on the downside of disk 20, first idler wheel 22 is equipped on the downside of each stabilizer blade 21, the first idler wheel 22, which rolls, to be connected
It connects on the upside of the bottom of groove 16.
Since turntable 20 can only adjust traction electric machine stator 6 with orifice plate 3 to positive-angle, when traction electric machine stator 6 is placed on
When position on turntable 20 is more inclined, left-right position of the traction electric machine stator 6 on turntable 20 can not be adjusted, in order to further be convenient for
It adjusts to just, as shown in Fig. 7 to 8, in the side that orifice plate 3 is connect with the second seat board 2 equipped at least sliding rail 23, sliding rail 23 are excellent together
Twice are selected as, open up sliding slot 24 with 23 corresponding position of sliding rail on the second seat board 2, sliding rail 23 is slidably connected in sliding slot 24.?
A nut 25, preferably 2 middle part of the second seat board in the two sides of sliding rail 23 are fixed in the middle part of second seat board 2 of at least side of sliding rail 23
It is respectively and fixedly provided with a nut 25.An adjusting rod 26 is threaded on nut 25, the outer end of adjusting rod 26 is equipped with adjusting handle
27.Rotation adjusting handle 27 can be such that orifice plate 3 moves left and right on the second seat board 2, and then adjustable hole 4 and strut 5 or so
To just.It should be noted that when using an adjusting rod 26 with the cooperation adjusting of nut 25, the inner end of adjusting rod 26 will be with
Orifice plate 3 is fixedly connected, when being adjusted using two adjusting rods 26 and two cooperations of nut 25, inner end and the orifice plate 3 of adjusting rod 26
Side is not fixed, and after the adjusting rod 26 for unclamping side, can be adjusted by the adjusting rod 26 of the other side, after adjusting, two
The inner end of adjusting rod 26 is abutted with orifice plate 3, orifice plate 3 can be made to connect with the second seat board 2 firm.
In order to reduce the moving resistance of slide plate 7, sliding track mechanism can be set between slide plate 7 and the first seat board 1, preferably exist
Multiple second idler wheels 9 are arranged in slide plate 7, and the quality of traction electric machine stator is larger, in order to make 7 uniform force of slide plate, multiple second rollings
The bottom side for being distributed in slide plate 7 of wheel 9 perfectly even.After overturning, slide plate 7 is in a vertical state, in order to prevent slide plate 7 from first
It is split away off on seat board 1, mounting groove 10 is equipped on the upside of the first seat board 1, slide plate 7 is arranged in mounting groove 10, and idler wheel 9, which rolls, to be connected
It connects on the upside of 10 bottom of mounting groove, mounting groove both sides are equipped with limiting slot 11, and 7 two sides of slide plate are equipped with retention bead 12, limit convex
Rise and 12 be slidably connected in limiting slot 11, in this way, retention bead 12 can anti-limited slip plate 7 fall off from the first seat board 1.
After traction electric machine stator 6 is hung on slide plate 7, slide plate 7 can be pushed mobile using artificial, for the ease of making
With being additionally provided with second hydraulic cylinder 13 on the upside of the first seat board 1,131 outer end of piston rod of second hydraulic cylinder 13 is connect with slide plate 7.
Second hydraulic cylinder 13 is 1 or 2, it is preferred to use 1, the upper middle side part of the first seat board 1 is arranged in second hydraulic cylinder 13, will not go out
Now pushing away local derviation causes resistance excessive, second hydraulic cylinder 13 can be made to stop afterwards in place in traction electric machine stator 6 by the way that limit switch is arranged
It only runs, equally, first hydraulic cylinder 33 can also be made to stop when the first seat board 1 is in horizontal and vertical position by limit switch
Only run.
Complete overturning after, need to hang out traction electric machine stator 6, can traction electric machine stator 6 upside end face with
It is screwed into the hanging ring equipped with threaded rod in the fixation wire hole of end cap, traction electric machine stator can be sling by the hanging ring, preferably be existed
The upper end of strut 5 offers external thread structure, and the lifting lug 15 for being equipped with screw hole using one is threaded in the upper end of strut 5.It is logical
It crosses after lifting lug 15 slings traction electric machine stator 6, traction electric machine stator can be stabilizer blade with strut 5, be stably placed at work
In region, stability when slinging and place in order to ensure traction electric machine stator 6, the quantity in hole 4 is preferably 4 or 6, thus
4 or 6 struts can be used.
The principle of the present invention is illustrated in conjunction with Fig. 2 to Fig. 8, and the piston rod 331 for first controlling first hydraulic cylinder 33 stretches out, and makes first
Seat board 1 is maintained at horizontal position, then hangs traction electric machine stator 6 and formerly hangs traction electric machine stator 6 on turntable 20
Side makes the cooling air holes on strut 5 and traction electric machine stator by adjusting the left-right position of turntable 20 rotation and regulating orifice plate 3
61 pairs just, and slide plate 7 is then made to move right, and enters strut 5 in corresponding cooling air holes 61, and in traction electric machine stator
After 6 right end face is abutted with limiting section 51, lifting lug 15 is screwed in the outer end of strut 5, then controls the work of first hydraulic cylinder 33
Stopper rod 331 is shunk, the first seat board 1 rotation to vertical position.It can be so perpendicular by horizontality overturning by traction electric machine stator 6
Then straight state slings traction electric machine stator 6, strut 5 is extracted from hole 4 with traction electric machine stator 6, and strut 5 can be at this time
For the footing of traction electric machine stator 6, it can be directly placed on ground and carry out related cleaning, drying and dipping lacquer work, in completion
After stating work, traction electric machine stator 6 is hung on the aperture plate 3, and is inserted into the lower end of strut 5 in hole 4, and traction electric machine stator
The side of slide plate 7 is arranged in 6 bottom, and the piston rod 331 for then controlling first hydraulic cylinder 33 again stretches out, and makes 1 turn of the first seat board
It moves to horizontal position, traction electric machine stator 6 can be overturn by vertical state as horizontality, after being moved to the left slide plate 7
Traction electric machine stator 6 is sling.
In conclusion the present invention overturns the rotation of the first seat board by traction electric machine stator by hydraulic cylinder extension, lead to
The left-right position for crossing rotation turntable and regulating orifice plate can make strut and cooling air holes to just, convenient for making strut be inserted into cooling air holes
Interior, strut limits traction electric machine stator when overturning, will not cause to damage to stator winding, and overturning back stay becomes stabilizer blade
It can be directly placed at working region, convenient for the operation such as the cleaning, drying and dipping lacquer in later period.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. it is a kind of convenient for adjust to positive nose suspension type traction electric machine stator turnover device, which is characterized in that including pedestal, the bottom
Fixed on the upside of in seat there are two sunpenders, and upside is hinged with first hydraulic cylinder thereafter, is fixed with connecting rod between two sunpender upper ends, institute
It states and is set in connecting rod there are two first bearing, the outer ring of the first bearing is connected with the first seat board, the first hydraulic cylinder
Piston rod front end is hinged on the back side of first seat board, and first seat board lower end is vertically fixedly connected with the second seat board, institute
It states and is provided with an orifice plate on the second seat board, multiple holes are provided on the orifice plate, a strut is inserted in each hole, the strut
Middle part periphery protrudes to form limiting section, and the diameter of the limiting section is greater than the cooling air holes of traction electric machine stator to be flipped and described
The internal diameter in hole, and the diameter of the strut on the outside of it is less than the internal diameter of the cooling air holes, first seat board is equipped with a slide plate,
The slide plate can be moved up in the first seat board it is dynamic, with far from or close to second seat board, and the strut is made to be inserted into the cooling
It extracts out in air holes or therefrom, after the end face of the traction electric machine stator is abutted with the limiting section, winding is set with the orifice plate
There is distance, the slide plate is equipped with a groove, and bearing block is equipped in the groove, is equipped with second bearing, institute in the bearing block
It states and is equipped with a shaft in second bearing, the shaft upper end is fixed with a turntable.
2. according to claim 1 be convenient for adjusting to positive nose suspension type traction electric machine stator turnover device, which is characterized in that
Outside is fixed with stabiliser bar in the middle part of the sunpender, and the stabiliser bar includes two, is symmetrically inclined at the two sides of the sunpender.
3. according to claim 1 be convenient for adjusting to positive nose suspension type traction electric machine stator turnover device, which is characterized in that
The first bearing bearing is cylinder roller bearing, and the second bearing is tapered roller bearing.
4. according to claim 1 be convenient for adjusting to positive nose suspension type traction electric machine stator turnover device, which is characterized in that
It is uniformly provided with multiple stabilizer blades on the downside of the turntable, first idler wheel is equipped on the downside of each stabilizer blade, first idler wheel, which rolls, to be connected
It connects on the upside of the bottom portion of groove.
5. according to claim 1 be convenient for adjusting to positive nose suspension type traction electric machine stator turnover device, which is characterized in that
The side that the orifice plate is connect with the second seat board is equipped at least sliding rail together, opens up on second seat board with sliding rail corresponding position
Sliding slot, the sliding rail are slidably connected in the sliding slot, and a nut, institute are fixed on the second seat board of the sliding rail at least side
It states nut thread and is connected with an adjusting rod, the adjusting rod outer end is equipped with adjusting handle.
6. according to claim 1 be convenient for adjusting to positive nose suspension type traction electric machine stator turnover device, which is characterized in that
Mounting groove is equipped on the upside of first seat board, the slide plate is arranged in the mounting groove, and the slide plate bottom is uniformly provided with more
A second idler wheel, the second idler wheel rolling are connected on the upside of the installation trench bottom.
7. according to claim 6 be convenient for adjusting to positive nose suspension type traction electric machine stator turnover device, which is characterized in that
The mounting groove both sides are equipped with limiting slot, and the slide plate two sides are equipped with retention bead, and the retention bead is slidably connected at institute
It states in limiting slot.
8. according to claim 1 be convenient for adjusting to positive nose suspension type traction electric machine stator turnover device, which is characterized in that
It is additionally provided with second hydraulic cylinder on the upside of first seat board, the piston rod outer end of the second hydraulic cylinder is connect with the slide plate.
9. according to claim 1 be convenient for adjusting to positive nose suspension type traction electric machine stator turnover device, which is characterized in that
The upper end of the strut offers external thread structure, and is threaded with lifting lug.
10. according to claim 1 convenient for adjusting to positive nose suspension type traction electric machine stator turnover device, feature exists
In the hole is 4 or 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820605069.0U CN208135736U (en) | 2018-04-26 | 2018-04-26 | It is a kind of convenient for adjust to positive nose suspension type traction electric machine stator turnover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820605069.0U CN208135736U (en) | 2018-04-26 | 2018-04-26 | It is a kind of convenient for adjust to positive nose suspension type traction electric machine stator turnover device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208135736U true CN208135736U (en) | 2018-11-23 |
Family
ID=64311069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820605069.0U Expired - Fee Related CN208135736U (en) | 2018-04-26 | 2018-04-26 | It is a kind of convenient for adjust to positive nose suspension type traction electric machine stator turnover device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208135736U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108502705A (en) * | 2018-04-26 | 2018-09-07 | 南京海传燕兰轨道交通科技有限公司 | It is a kind of to be convenient for adjusting to positive nose suspension type traction electric machine stator turnover device |
| CN111704090A (en) * | 2020-05-06 | 2020-09-25 | 中铁六局集团有限公司 | Prefabricated part overturning method |
-
2018
- 2018-04-26 CN CN201820605069.0U patent/CN208135736U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108502705A (en) * | 2018-04-26 | 2018-09-07 | 南京海传燕兰轨道交通科技有限公司 | It is a kind of to be convenient for adjusting to positive nose suspension type traction electric machine stator turnover device |
| CN111704090A (en) * | 2020-05-06 | 2020-09-25 | 中铁六局集团有限公司 | Prefabricated part overturning method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20181123 Termination date: 20190426 |