CN110307237A - A kind of hydraulic nut - Google Patents
A kind of hydraulic nut Download PDFInfo
- Publication number
- CN110307237A CN110307237A CN201910684165.8A CN201910684165A CN110307237A CN 110307237 A CN110307237 A CN 110307237A CN 201910684165 A CN201910684165 A CN 201910684165A CN 110307237 A CN110307237 A CN 110307237A
- Authority
- CN
- China
- Prior art keywords
- slot
- offers
- nut
- locking slot
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 7
- 235000005121 Sorbus torminalis Nutrition 0.000 claims description 6
- 244000152100 Sorbus torminalis Species 0.000 claims description 6
- 238000000034 method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
Abstract
The present invention relates to nut fields, specifically a kind of hydraulic nut, including nut body, the lower end of nut body offers circular groove, the upper end of nut body offers through slot, and circular groove is connected with through slot, the inner wall of circular groove is rotatably connected to latch segment by ball, the side wall of latch segment offers locking hole, the lower end right side opening of nut body is equipped with locking window, the inside of latch segment offers loose slot, the internal slide of loose slot is connected with clamping block, the interior lower end of clamping block offers the first locking slot, the upper end of first locking slot offers the second locking slot, the upper end of second locking slot offers third locking slot.Pass through the first locking slot of setting, the second locking slot and third locking slot, three kinds of different size of retainers can be latched using the first locking slot, the second locking slot and third locking slot, people using when increase the scope of application of hydraulic nut, facilitate people carry out using.
Description
Technical field
The present invention relates to hydraulic nut field, specifically a kind of hydraulic nut.
Background technique
Hydraulic nut is a kind of advanced bolt assembling method, tight especially suitable for narrow space and heavy load vibrating machine
Gu.The working principle of hydraulic nut is directly to apply external force to bolt using hydraulic cylinder, makes the bolt for being applied power in its bullet
Property is elongated in deformed area, the retainer on hydraulic nut is screwed after bolt lengthening, such bolt will be locked at elongation by retainer
Position on.
Hydraulic nut used at present can only carry out single retainer using needing replacing when locking different retainers
The hydraulic nut of different model, the scope of application is small, is also required to corresponding swivel nut to spiral shell when locking to the screw rod that needs stretch
Bar is fixed, and existing hydraulic nut can only also be fixed corresponding screw rod, and it is same to encounter different size of screw rod
Hydraulic nut is needed replacing, work together inefficiency, and the bottom of hydraulic nut has no any safeguard measure, in the process of pressurization
In may be to needing the surface of securing objects to cause to weigh wounded.
Summary of the invention
For the problems of the prior art, the present invention provides a kind of hydraulic nuts.
The technical solution adopted by the present invention to solve the technical problems is: a kind of hydraulic nut, including nut body, special
Sign is: the lower end of the nut body offers circular groove, and the upper end of the nut body offers through slot, and circular groove and through slot
It is connected, the inner wall of the circular groove is rotatably connected to latch segment by ball, and the side wall of the latch segment offers locking hole, institute
The lower end right side opening for stating nut body is equipped with locking window, and the inside of the latch segment offers loose slot, the loose slot it is interior
Portion slidably connects clamping block, and the interior lower end of the clamping block offers the first locking slot, the upper end of first locking slot
The second locking slot is offered, the upper end of second locking slot offers third locking slot, and the upper end of the locking slot offers
First through hole, and the upper end of latch segment also offers first through hole, the upper end of the clamping block is fixedly connected with adjustable spring, and
The upper end of adjustable spring is fixedly connected with the top of loose slot, offers hydraulic cavities in the middle part of the nut body.
Specifically, being fixedly connected with pressurization connecting tube on the left of the nut body, the right side of the nut body is fixed
It is connected with pressure release connecting tube, and connecting tube of pressurizeing is connected with hydraulic cavities with pressure release connecting tube, the inside of the hydraulic cavities is set
There is hydraulic piston, the upper end of the hydraulic piston is fixedly connected with jacking block, offers activity in the upper half of the nut body
Chamber, and movable chamber runs through the upper end of nut body.
Specifically, the jacking block is flexibly connected through the inside that hydraulic cavities protrude into movable chamber with movable chamber, the movable chamber
Internal activity be connected with and prop up block, the upper end for propping up block is fixedly connected with top cover, and the upper end of the top cover offers card
Slot is closed, the bottom of the engaging slot offers the second through-hole, and the inside of the engaging slot, which is connected together, retaining mechanism, and locks
Mechanism protrudes into the inside of through slot through the second through-hole, and the inside of the retaining mechanism offers screw hole, under the nut body
End is fixedly connected with rubber mat.
Specifically, the inner wall of the loose slot offers sliding slot, the side wall of the clamping block corresponds to first sliding groove sliding and connects
It is connected to sliding block.Clamping block is facilitated to be slided in the inside of sliding groove.
Specifically, the bore of second locking slot is 3/4ths of the first locking slot bore, the third locking slot
Bore be 3/4ths of the second locking slot, can be adapted for three kinds of different screw rods of bore.
Specifically, the inside of the hydraulic cavities is fixedly connected with sealing block, and jacking block runs through sealing block.Strengthen hydraulic cavities
Internal leakproofness.
Specifically, the upper half and lower half two sidewalls of the movable chamber offer guide groove, the jacking block and prop up
The two sides of block are fixedly connected to guide pad, and guide groove is slidably connected with guide pad.When alloing jacking block and propping up block and move
It is more stable.
Specifically, the retaining mechanism includes the first swivel nut, the second swivel nut and third swivel nut, and the first swivel nut, the second spiral shell
Set and third swivel nut are corresponding with the first locking slot, the second locking slot and third locking slot internal screw bore respectively, improve
The scope of application of nut body.
Specifically, the lower end of the rubber mat offers anti-skid chequer, and anti-skid chequer is set as waveform, avoids nut body and exists
There are problems that sliding during use.
Beneficial effects of the present invention:
(1) present invention is by the first locking slot of setting, the second locking slot and third locking slot, utilizes the first locking slot, the
Two locking slots and third locking slot can latch three kinds of different size of retainers, people using when increase the suitable of hydraulic nut
With range, facilitate people carry out using.
(2) present invention is by the first swivel nut of setting, the second swivel nut and third swivel nut, using the first swivel nut, the second swivel nut and
Third swivel nut can be threadedly coupled the screw rod of three kinds of different bores, improve the working efficiency of workpeople, avoid original
Have device that can only fix a kind of screw rod and dally over one's work the time the problem of.
(3) present invention can be played using foot pad when hydraulic nut is worked slow by setting foot pad and anti-skid chequer
The effect of punching, and foot pad is avoided and is directly contacted while generating pressure between hydraulic nut and fastener, it is therefore prevented that fastening
Object is under pressure and damages.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is a kind of overall structure diagram of hydraulic nut proposed by the present invention；
Fig. 2 is a kind of schematic diagram of internal structure of hydraulic nut proposed by the present invention；
Fig. 3 is a kind of main view of hydraulic nut proposed by the present invention；
Fig. 4 is a kind of portion A enlarged drawing of hydraulic nut proposed by the present invention.
In figure: 1, nut body；2, circular groove；3, through slot；4, latch segment；5, locking hole；6, window is locked；7, loose slot；8,
Clamping block；9, the first locking slot；10, the second locking slot；11, third locking slot；12, first through hole；13, adjustable spring；14, liquid
Press chamber；15, pressurization connecting tube；16, pressure release connecting tube；17, hydraulic piston；18, jacking block；19, movable chamber；20, block is propped up；21,
Top cover；22, engaging slot；23, the second through-hole；24, retaining mechanism；2401, the first swivel nut；2402, the second swivel nut；2403, third
Swivel nut；25, screw hole；26, rubber mat；27, sliding slot；28, sliding block；29, sealing block；30, guide groove；31, guide pad；32, anti-skid chequer.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is further explained.
As Figure 1-Figure 4, a kind of hydraulic nut of the present invention, including nut body 1, the nut body 1
Lower end offers circular groove 2, and the upper end of the nut body 1 offers through slot 3, and circular groove 2 is connected with through slot 3, the circular groove 2
Inner wall latch segment 4 is rotatably connected to by ball, the side wall of the latch segment 4 offers locking hole 5, the nut body 1
Lower end right side opening be equipped with locking window 6, the inside of the latch segment 4 offers loose slot 7, the internal slide of the loose slot 7
It is connected with clamping block 8, the interior lower end of the clamping block 8 offers the first locking slot 9, and the upper end of first locking slot 9 is opened
Equipped with the second locking slot 10, the upper end of second locking slot 10 offers third locking slot 11, and the upper end of the locking slot is opened
Equipped with first through hole 12, and the upper end of latch segment 4 also offers first through hole 12, and the upper end of the clamping block 8 is fixedly connected with
Adjustable spring 13, and the upper end of adjustable spring 13 is fixedly connected with the top of loose slot 7, the middle part of the nut body 1 opens up
There are hydraulic cavities 14；
The left side of the nut body 1 is fixedly connected with pressurization connecting tube 15, and the right side of the nut body 1 is fixedly connected
There is pressure release connecting tube 16, and connecting tube 15 of pressurizeing is connected with hydraulic cavities 14 with pressure release connecting tube 16, the hydraulic cavities 14
Inside is equipped with hydraulic piston 17, and the upper end of the hydraulic piston 17 is fixedly connected with jacking block 18, the upper half of the nut body 1
Movable chamber 19 is inside offered, and movable chamber 19 runs through the upper end of nut body 1, and jacking block 18 protrudes into movable chamber through hydraulic cavities 14
19 inside is flexibly connected with movable chamber 19, and the internal activity of the movable chamber 19, which is connected with, props up block 20, described to prop up block 20
Upper end be fixedly connected with top cover 21, the upper end of the top cover 21 offers engaging slot 22, and the bottom of the engaging slot 22 opens up
There is the second through-hole 23, the inside of the engaging slot 22, which is connected together, retaining mechanism 24, and retaining mechanism 24 runs through the second through-hole
23 protrude into the inside of through slot 3, and the inside of the retaining mechanism 24 offers screw hole 25, and the lower end of the nut body 1 is fixed to be connected
It is connected to rubber mat 26.
As a kind of specific technical solution of the present embodiment, the inner wall of the loose slot 7 offers sliding slot 27, the engaging
The side wall of block 8 corresponds to first sliding groove 27 and slidably connects sliding block 28, and clamping block 8 is movable in loose slot 7, sliding block while movable
28, in 27 internal slide of sliding slot, ensure that the movable stabilization of clamping block 8.
As a kind of specific technical solution of the present embodiment, the bore of second locking slot 10 is 9 mouthfuls of the first locking slot
3/4ths of diameter, the bore of the third locking slot 11 are 3/4ths of the second locking slot 10, the second set locking
The bore of slot 10 and the caliber size of third locking slot 11 are bonded the most with corresponding retainer outer diameter, the first locking slot 9, second lock
Tight slot 10, third locking slot 11 can carry out fastening clamping from different retainers, keep 1 scope of application of nut body more extensive.
As a kind of specific technical solution of the present embodiment, the inside of the hydraulic cavities 14 is fixedly connected with sealing block 29,
And jacking block 18 runs through sealing block 29, sealing block 29 can reinforce the sealing effect inside hydraulic cavities 14, and leakage is avoided to press.
As a kind of specific technical solution of the present embodiment, the upper half and lower half two sidewalls of the movable chamber 19 are opened
Equipped with guide groove 30, the jacking block 18 and the two sides for propping up block 20 are fixedly connected to guide pad 31, and guide groove 30 and guiding
Block 31 is slidably connected, and jacking block 18 is moved with guide pad 31 while propping up the movement of block 20 along guide groove 30, avoids top
Block 18 and prop up block 20 movement it is unstable, the retaining mechanism 24 include the first swivel nut 2401, the second swivel nut 2402 and third spiral shell
Set 2403, and the first swivel nut 2401, the second swivel nut 2402 and third swivel nut 2403 respectively with the first locking slot 9, the second locking slot
10 and 11 internal screw bore of third locking slot it is corresponding.
In the present embodiment, by being fixed with different size of screw rod, the use scope of nut body 1 is increased.
As a kind of specific technical solution of the present embodiment, the lower end of the rubber mat 26 offers anti-skid chequer 32, and anti-skidding
Line 32 is set as waveform, and the frictional force of 1 bottom of nut body is increased by anti-skidding ripple, plays nut body 1 anti-skidding
Effect.
The working principle of the invention and process for using: when in use, taking suitable retaining mechanism 24 first, then will card
It closes block 8 and is socketed in the retainer upper end for needing to fasten, make the first locking slot 9 or the second locking slot 10 or third locking slot 11 and needs
The retainer of fastening engages, and is threadedly coupled the screw rod that retaining mechanism 24 is threadedly coupled with retainer after engaging, makes retaining mechanism
24 are fastened on the inside of 21 upper end engaging slot 22 of top cover, then using pressurization connecting tube 15 to pressurizeing inside hydraulic cavities 14,
Pressure inside hydraulic cavities 14, which rises, pushes hydraulic piston 17 to move up, and jacking block 18 is pushed while hydraulic piston 17 moves up and is propped up
Block 20 is moved up by guide pad 31 along guide groove 30, is propped up and is driven the engaging of 18 upper end of jacking block while block 20 moves up
Retaining mechanism 24 inside slot 22 moves up, and because retaining mechanism 24 is connect with bolt thread, retaining mechanism 24 drives bolt to move up
A reversed active force can be generated simultaneously, adjustable spring 13 is made to apply pressure to clamping block 8, is then locked by the way that pin shaft to be inserted into
The inside of tieholen 5 makes clamping block 8 drive retainer rotation, passes through pressure release connecting tube after locking retainer by pin shaft rotation lock block 4
16 carry out pressure release, complete the fastening to retainer.Pass through the first locking slot 9 of setting, the second locking slot 10 and third locking slot 11, benefit
Three kinds of different size of retainers can be latched with the first locking slot 9, the second locking slot 10 and third locking slot 11, are used in people
When increase the scope of application of hydraulic nut, facilitate people carry out using；By the way that the first swivel nut 2401, the second swivel nut is arranged
2402 and third swivel nut 2403, it can be to three kinds of differences using the first swivel nut 2401, the second swivel nut 2402 and third swivel nut 2403
The screw rod of bore is threadedly coupled, and the working efficiency of workpeople is improved, and a kind of screw rod can only be fixed by avoiding original device
And dally over one's work the time the problem of.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the description in above embodiment and specification only illustrates the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and
Improvement is both fallen in the scope of protection of present invention.The claimed scope of the invention is by appended claims and its equivalent
Object defines.
Claims (9)
1. a kind of hydraulic nut, including nut body (1), it is characterised in that: the lower end of the nut body (1) offers circular groove
(2), the upper end of the nut body (1) offers through slot (3), and circular groove (2) is connected with through slot (3), the circular groove (2)
Inner wall is rotatably connected to latch segment (4) by ball, and the side wall of the latch segment (4) offers locking hole (5), the nut sheet
The lower end right side opening of body (1) is equipped with locking window (6), and the inside of the latch segment (4) offers loose slot (7), the loose slot
(7) internal slide is connected with clamping block (8), and the interior lower end of the clamping block (8) offers the first locking slot (9), described
The upper end of first locking slot (9) offers the second locking slot (10), and the upper end of second locking slot (10) offers third lock
Tight slot (11), the upper end of the locking slot offers first through hole (12), and the upper end of latch segment (4) also offers first through hole
(12), the upper end of the clamping block (8) is fixedly connected with adjustable spring (13), and the upper end of adjustable spring (13) and loose slot
(7) top is fixedly connected, and offers hydraulic cavities (14) in the middle part of the nut body (1).
2. a kind of hydraulic nut according to claim 1, it is characterised in that: the left side of the nut body (1) is fixed to be connected
It is connected to pressurization connecting tube (15), is fixedly connected with pressure release connecting tube (16) on the right side of the nut body (1), and connecting tube of pressurizeing
(15) it is connected with hydraulic cavities (14) with pressure release connecting tube (16), the inside of the hydraulic cavities (14) is equipped with hydraulic piston
(17), the upper end of the hydraulic piston (17) is fixedly connected with jacking block (18), is offered in the upper half of the nut body (1)
Movable chamber (19), and movable chamber (19) runs through the upper end of nut body (1).
3. a kind of hydraulic nut according to claim 2, it is characterised in that: the jacking block (18) is stretched through hydraulic cavities (14)
The inside for entering movable chamber (19) is flexibly connected with movable chamber (19), and the internal activity of the movable chamber (19), which is connected with, props up block
(20), the upper end for propping up block (20) is fixedly connected with top cover (21), and the upper end of the top cover (21) offers engaging slot
(22), the bottom of the engaging slot (22) offers the second through-hole (23), and the inside of the engaging slot (22) is connected together and has lock
Tight mechanism (24), and retaining mechanism (24) protrudes into the inside of through slot (3) through the second through-hole (23), the retaining mechanism (24)
Inside offers screw hole (25), and the lower end of the nut body (1) is fixedly connected with rubber mat (26).
4. a kind of hydraulic nut according to claim 1, it is characterised in that: the inner wall of the loose slot (7) offers cunning
Slot (27), the side wall of the clamping block (8) correspond to first sliding groove (27) and slidably connect sliding block (28).
5. a kind of hydraulic nut according to claim 1, it is characterised in that: the bore of second locking slot (10) is
3/4ths of one locking slot (9) bore, the bore of the third locking slot (11) are 3/4ths of the second locking slot (10).
6. a kind of hydraulic nut according to claim 1, it is characterised in that: the inside of the hydraulic cavities (14) is fixedly connected
Have sealing block (29), and jacking block (18) runs through sealing block (29).
7. a kind of hydraulic nut according to claim 1, it is characterised in that: the upper half of the movable chamber (19) and lower half
Portion two sidewalls offer guide groove (30), and the jacking block (18) and the two sides for propping up block (20) are fixedly connected to guide pad
(31), and guide groove (30) is slidably connected with guide pad (31).
8. a kind of hydraulic nut according to claim 1, it is characterised in that: the retaining mechanism (24) includes the first swivel nut
(2401), the second swivel nut (2402) and third swivel nut (2403), and the first swivel nut (2401), the second swivel nut (2402) and third spiral shell
It is corresponding with the first locking slot (9), the second locking slot (10) and third locking slot (11) internal screw bore respectively to cover (2403).
9. a kind of hydraulic nut according to claim 1, it is characterised in that: the lower end of the rubber mat (26) offers anti-skidding
Line (32), and anti-skid chequer (32) is set as waveform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910684165.8A CN110307237B (en) | 2019-07-26 | 2019-07-26 | Hydraulic nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910684165.8A CN110307237B (en) | 2019-07-26 | 2019-07-26 | Hydraulic nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110307237A true CN110307237A (en) | 2019-10-08 |
| CN110307237B CN110307237B (en) | 2021-03-26 |
Family
ID=68081852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910684165.8A Active CN110307237B (en) | 2019-07-26 | 2019-07-26 | Hydraulic nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110307237B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03103610A (en) * | 1989-09-18 | 1991-04-30 | Toshiba Corp | Apparatus for tightening axial force bolt |
| CN1344193A (en) * | 1999-02-26 | 2002-04-10 | 约翰温特沃思·巴克内尔 | Tensioning hydraulic nuts |
| CN2758526Y (en) * | 2003-12-24 | 2006-02-15 | 沈阳气体压缩机股份有限公司 | Crosshead hydraulic jointing fastener |
| CN1994683A (en) * | 2006-10-20 | 2007-07-11 | 渤海船舶重工有限责任公司 | Force split hydraulic screw |
| CN102350678A (en) * | 2011-09-28 | 2012-02-15 | 河南科技大学 | Multi-specification sleeve |
| CN202200024U (en) * | 2011-08-16 | 2012-04-25 | 上海创力集团股份有限公司 | Hydraulic screw rod stretcher |
| CN104691009A (en) * | 2013-12-10 | 2015-06-10 | 扬州锻压机床股份有限公司 | Nut locking device for press machine |
| CN204843481U (en) * | 2015-07-24 | 2015-12-09 | 大连金航船机有限公司 | Shipbuilding / nuclear power field is with automatic re -setting hydraulic tensioning ware |
| CN207437551U (en) * | 2017-10-23 | 2018-06-01 | 科赫工业设备技术（上海）有限公司 | A kind of hydraulic nut |
-
2019
- 2019-07-26 CN CN201910684165.8A patent/CN110307237B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03103610A (en) * | 1989-09-18 | 1991-04-30 | Toshiba Corp | Apparatus for tightening axial force bolt |
| CN1344193A (en) * | 1999-02-26 | 2002-04-10 | 约翰温特沃思·巴克内尔 | Tensioning hydraulic nuts |
| CN2758526Y (en) * | 2003-12-24 | 2006-02-15 | 沈阳气体压缩机股份有限公司 | Crosshead hydraulic jointing fastener |
| CN1994683A (en) * | 2006-10-20 | 2007-07-11 | 渤海船舶重工有限责任公司 | Force split hydraulic screw |
| CN202200024U (en) * | 2011-08-16 | 2012-04-25 | 上海创力集团股份有限公司 | Hydraulic screw rod stretcher |
| CN102350678A (en) * | 2011-09-28 | 2012-02-15 | 河南科技大学 | Multi-specification sleeve |
| CN104691009A (en) * | 2013-12-10 | 2015-06-10 | 扬州锻压机床股份有限公司 | Nut locking device for press machine |
| CN204843481U (en) * | 2015-07-24 | 2015-12-09 | 大连金航船机有限公司 | Shipbuilding / nuclear power field is with automatic re -setting hydraulic tensioning ware |
| CN207437551U (en) * | 2017-10-23 | 2018-06-01 | 科赫工业设备技术（上海）有限公司 | A kind of hydraulic nut |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110307237B (en) | 2021-03-26 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210126 Address after: 315410 Zhangting Town Industrial Park, Yuyao City, Ningbo City, Zhejiang Province Applicant after: Zhejiang Jieneng Auto Parts Co.,Ltd. Address before: 230000 7536, North building, No.19 Tianzhi Road, high tech Zone, Hefei City, Anhui Province Applicant before: Zhou Chao |
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| GR01 | Patent grant |