CN105673818B - Single screw extrusion machine main-gear box assembly and its application - Google Patents
Single screw extrusion machine main-gear box assembly and its application Download PDFInfo
- Publication number
- CN105673818B CN105673818B CN201610246106.9A CN201610246106A CN105673818B CN 105673818 B CN105673818 B CN 105673818B CN 201610246106 A CN201610246106 A CN 201610246106A CN 105673818 B CN105673818 B CN 105673818B
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- thrust
- output shaft
- screw rod
- hollow output
- gear
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Classifications
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
- B29C48/2522—Shaft or screw supports, e.g. bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
- B29C48/2526—Direct drives or gear boxes
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
- F16H57/022—Adjustment of gear shafts or bearings
- F16H2057/0221—Axial adjustment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of single screw extrusion machine main-gear box assembly and its application, including main-gear box and thrust screw rod, main-gear box are hollow output shaft, and its end is internal spline, while are provided with two positioning holes；Thrust screw rod front portion is thrust spiral, and rear portion is positioning neck, and positioning neck is provided with external splines and raised axle journal, and the diameter of raised axle journal is more than the diameter of thrust spiral, and less than the diameter of end external splines；The distal end faces of hollow output shaft are furnished with adjusting pad and rear pressing cover, and front end is furnished with the outer gear sleeve containing endoporus, and the endoporus of outer gear sleeve is more than the diameter of thrust spiral；After the preceding end thrust spiral of thrust screw rod passes through outer gear sleeve endoporus, raised axle journal is placed in the positioning hole of hollow output shaft, and external splines engages with internal spline；Swivel joint passes through rear pressing cover and adjusting pad and is connected with thrust screw rod, and is linked up with the cyclic water channel in thrust screw rod.In use, extrusion glue unit at least configures the material conveyor of an assembly containing single-screw extruder gearbox.
Description
Technical field
It is especially a kind of single the present invention relates to a kind of main-gear box assembly supporting with rubber industry extrusion glue unit equipment
Screw extruder main-gear box assembly.
Background technology
With the continuous development of China's economy, automobile industry increasingly shows its importance in economic development.Its
Quickly development has also driven flourishing for rubber and tyre industry simultaneously.Continued to develop in rubber tyre industry same
When, higher requirement it is also proposed to the production equipment of its related industry.Single screw extrusion machine is as in rubber processing industry
Necessaries, demand are increased.Gear-box is as a kind of production key equipment, due to the applying working condition of single screw extrusion machine
Very special, just the design to gear-box and manufacture propose higher requirement for this.Big specification, high speed, how compound single spiral shell
Bar extruder gearbox has become the direction trend of single-screw extruder gearbox.
Screw rod is the core component of material conveyor in extruder, and is consumable accessory, and user need to change screw rod in every 1 ~ 2 year,
Period must periodic maintenance repair thrust screw rod, at this moment must dismantle thrust screw rod.The dismantling screw of traditional single screw extrusion machine
The step of being is：The pin on material conveyor machine barrel is first dismantled, head and die head are dismantled, then from the back side of main-gear box
Thrust screw rod is ejected forward with jack, because screw rod is longer and heavier, it is necessary to large-scale lifting appliance be employed, to meet necessarily
The withdrawal space of amount, often also need to dismantle a large amount of subordinate line equipment at material mixed export end, such as film cooling system etc., take
When it is laborious.Because inside screw must lead to hot water heating, single-screw extruder gearbox, hot water return are by output shaft at present
What hole was realized, it easily causes the concentric locating face corrosion of thrust screw rod and reduction gearbox output shaft to this traditional way of supplying water,
Cause screw rod to be difficult to split out, the positioning precision between output shaft and thrust screw rod is even influenced whether when serious, causes to make thrust
Screw rod sweeps the mechanical accident of thorax.
How to mitigate workload when safeguarding thrust screw rod, and prevent from traditional by output shaft endoporus way of supplying water being jeopardized
The positioning precision of thrust screw rod, the problems such as thrust screw rod stator scrapping rotor is even resulted in when serious, be that this area is in the urgent need to address
Technical barrier, the solution for corresponding to these technical problems at present is not seen in report.
The content of the invention
It is an object of the invention to：It can only be dismantled for current single-screw extruder gearbox screw rod from front portion, workload
It is larger, and traditional positioning precision by output shaft endoporus way of supplying water entail dangers to thrust screw rod, thrust is even resulted in when serious
A series of problems, such as screw rod stator scrapping rotor, there is provided a kind of new single screw extrusion machine main-gear box and its application.
The object of the present invention is achieved like this：A kind of single screw extrusion machine main-gear box assembly, including main-gear box and
Thrust screw rod, it is characterised in that：The output shaft of main-gear box is hollow output shaft, and its end is provided with internal spline, hollow output shaft
In be provided with two before and after the positioning hole that is distributed, the diameter of positioning hole is less than the internal diameter of hollow output shaft；Thrust screw rod front portion is provided with
Thrust spiral, rear portion are positioning neck, and positioning neck end is provided with the external splines matched with internal spline in hollow output shaft, positioned on neck
Two sections of raised axle journals are additionally provided with, they are corresponding with positioning hole in hollow output shaft, and the diameter of raised axle journal is more than anterior thrust
The diameter of spiral, and less than the diameter of end external splines；The distal end faces of hollow output shaft are furnished with adjusting pad and rear pressing cover, front end
Equipped with the outer gear sleeve containing endoporus, the endoporus of outer gear sleeve is more than the diameter of thrust spiral；Thrust screw rod front portion thrust spiral is worn
More after outer gear sleeve endoporus, the raised axle journal for positioning neck is placed in the positioning hole of hollow output shaft, the external splines of latter end with it is hollow
Internal spline engagement in output shaft, adjusting pad are mounted by means of bolts on the end face of thrust screw rod, and rear pressing cover is by uniformly dividing
The inner ring bolt of cloth is connected with adjusting pad and thrust screw rod, while passes through equally distributed outer ring bolt and hollow output shaft end face
Connection；Swivel joint passes through rear pressing cover and adjusting pad and is connected with thrust screw rod successively, its water inlet and water return outlet respectively with thrust
Cyclic water channel in screw rod is linked up.
In the present invention：Main-gear box includes input gear axle, double reduction gearing axle and the described sky be arrangeding in parallel
Heart output shaft, they by bearings in casing, wherein, deceleration gear wheel is equipped with double reduction gearing axle, they
It is fixedly mounted on by key on corresponding reduction gear shaft, output gear wheel is installed with by key in hollow output shaft；It is defeated
Enter gear shaft to engage with first reduction gear wheel, first order reduction gear shaft engages with second level deceleration gear wheel, the second level
Reduction gear shaft engages with output gear wheel；Swivel joint from rear pressing cover and adjusting pad center pass through after by the screw thread of matching with
Thrust screw rod distal end faces are connected, and its water inlet and water return outlet are linked up with the cyclic water channel in thrust screw rod respectively.
In the present invention：Spring bearing positioned at hollow output shaft end is cylinder roller bearing, positioned at hollow output shaft
The spring bearing of front end is followed successively by thrust bearing and cylinder roller bearing from inside to outside；Described thrust roller bearing passes through sky
Seam positioning on the axle journal and casing of heart output shaft.
A kind of application of above-mentioned main-gear box assembly, it is characterised in that rubber industry extrudes the material of glue unit equipment
Import at least configures the material conveyor of an assembly containing single-screw extruder gearbox.
It is an advantage of the current invention that because output shaft is hollow output shaft, thrust screw rod end face is equipped with adjusting pad and rear pressure
Lid, adjusting pad are mounted by means of bolts on the end face of thrust screw rod, and rear pressing cover passes through equally distributed inner ring bolt and adjustment
Pad connects with thrust screw rod.Due to being provided with positioning hole in hollow output shaft, the diameter of positioning hole is less than the internal diameter of hollow output shaft,
The axle journal of projection is additionally provided with positioning neck, they are corresponding with positioning hole in hollow output shaft, and raised diameter is more than anterior thrust
The diameter of spiral, and less than the diameter of end external splines, thrust screw rod can insert from hollow output shaft end during assembling, and pass through
Internal and external cycle bolt on adjusting pad and rear pressing cover is fixedly connected with hollow output shaft, is taken out after can removing bolt during maintenance from end
Go out, it is not necessary to dismantle a large amount of subordinate line equipment at material inlet end.Because hollow output shaft end is provided with internal spline, before thrust screw rod
Hold as thrust spiral, latter end is provided with external splines, the preceding end thrust spiral of thrust screw rod pass through be connected with hollow output shaft it is outer
After geared sleeve, the external splines of latter end engages with the internal spline of hollow output shaft, can effectively transmit moment of torsion.Before thrust screw rod
After the thrust spiral in portion passes through outer gear sleeve, the raised axle journal for positioning neck is placed in the positioning hole of hollow output shaft, it can be ensured that
Thrust screw rod precise positioning.Because hollow output shaft front end is furnished with outer gear sleeve, outer gear sleeve and hollow output shaft are same in use
Step motion, drives the gear in barrel, drives material to be released through thrust spiral.Due to swivel joint successively from pass through rear pressing cover and
After adjusting pad, its central passage and the center water channel of thrust screw rod are linked up, and hot water only circulates in thrust inside screw, avoids borrowing
It output shaft, can avoid entering output shaft for the hot water of thrust screw rod, avoid forming incrustation scale, corrosion in hollow input shaft,
Influence the positioning precision to thrust screw rod.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the structural representation of hollow output shaft embodiment；
Fig. 3 is the partial enlarged drawing of I in Fig. 1；
Fig. 4 is the end C direction views of hollow output shaft of the present invention；
Application of Fig. 5 present invention in the rubber equipment that two kinds of materials compound.
In figure：1st, input gear axle；2nd, first order reduction gear shaft；3rd, second level reduction gear shaft；4th, casing；5th, first
Level deceleration gear wheel；6th, double reduction gear wheel；7th, gear wheel is exported；8th, rear pressing cover；9th, adjusting pad；10th, cylinder roller bearing；
11st, hollow output shaft；12nd, thrust bearing；13rd, cylinder roller bearing；14th, outer ring bolt；15th, inner ring bolt；16th, rotation connects
Head；17th, bolt；18th, thrust screw rod；19th, external splines；20th, internal spline；21st, water inlet；22nd, water return outlet；23rd, material is mixed into
Mouthful, 24, positioning hole；25, axle journal；26th, outer gear sleeve.
Embodiment
The nonrestrictive concrete structure for disclosing the embodiment of the present invention of accompanying drawing, makees to the present invention into one below in conjunction with the accompanying drawings
The description of step.
From Fig. 1-4, the present invention includes single main-gear box and thrust screw rod 18, and the output shaft of main-gear box is hollow defeated
Shaft 11, its end are provided with internal spline 20, are provided with the positioning hole 24 being distributed before and after two in hollow output shaft, positioning hole 24 it is straight
Footpath is less than the internal diameter of hollow output shaft 11；Thrust screw rod 18 is anterior to be provided with thrust spiral, and rear portion is positioning neck, and positioning neck end is set
Have an external splines 19 matched with internal spline in hollow output shaft, position and be additionally provided with two sections of raised axle journals 25 on neck, they with it is empty
The correspondence of positioning hole 24 in heart output shaft 11, the diameter of raised axle journal 25 is more than the diameter of anterior thrust spiral, and is less than outside end
The diameter of spline 19；The distal end faces of hollow output shaft 11 are furnished with adjusting pad 9 and rear pressing cover 8, and front end is furnished with the external tooth containing endoporus
Wheel case 26, the endoporus of outer gear sleeve 26 are more than the diameter of thrust spiral；The preceding end thrust spiral of thrust screw rod 18 passes through external gear
Set 26 after, the raised axle journal 25 for positioning neck is placed in the positioning hole 24 of hollow output shaft 11, the external splines 19 of latter end with it is hollow defeated
Internal spline 20 in shaft 11 engages, and adjusting pad 9 is fixedly mounted on the end face of thrust screw rod 18 by bolt 17, and rear pressing cover 8 is logical
Cross equally distributed inner ring bolt 15 to be connected with adjusting pad 9 and thrust screw rod 18, while pass through equally distributed outer ring bolt 14
It is connected with the end face of hollow output shaft 11；Swivel joint 16 passes through rear pressing cover 8 and adjusting pad 9 successively, its water inlet 21 and water return outlet
22 link up with the cyclic water channel in thrust screw rod 18 respectively.
In the present embodiment：Single screw extrusion machine main-gear box includes input gear axle 1, the first order deceleration be arrangeding in parallel
Gear shaft 2, second level reduction gear shaft 3 and described hollow output shaft 11, they by bearings in casing 4, wherein,
First order reduction gear shaft 2 is provided with first reduction gear wheel 5, and second level reduction gear shaft 3 is provided with the second level and slowed down greatly
Gear 6, they by key be fixedly mounted on corresponding to be installed with reduction gear shaft, in hollow output shaft 11 by key it is defeated
Go out gear wheel 7；Input gear axle 1 engages with first reduction gear wheel 5, and first order reduction gear shaft 2 slows down big with the second level
Gear 6 engages, and second level reduction gear shaft 3 engages with output gear wheel 7；Swivel joint 16 is from rear pressing cover 8 and the center of adjusting pad 9
Be connected after passing through by the screw thread of matching with the distal end faces of thrust screw rod 18, its water inlet 21 and water return outlet 22 respectively with thrust
Cyclic water channel in screw rod 18 is linked up.
During specific implementation：The spring bearing of the end of hollow output shaft 11 is cylinder roller bearing 10, the support of the other end
Bearing is followed successively by thrust bearing 12 and cylinder roller bearing 13 from inside to outside；Described thrust roller bearing 12 passes through hollow output
Seam positioning on the axle journal and casing 4 of axle 11.
In actual applications, the material mixing import 23 of rubber industry extrusion glue unit equipment at least configures one to the present invention
Material conveyor containing single-screw extruder gearbox, their discharging opening are located at the material mixing import of rubber equipment
23.As seen from Figure 5, when glue raw material contains two kinds of materials, it should two groups of single screw extrusion machine main-gear box assemblies are configured, and
The anterior thrust spiral of thrust screw rod 18 in single screw extrusion machine main-gear box assembly is placed in pusher thorax.
Claims (4)
1. a kind of single screw extrusion machine main-gear box assembly, including main-gear box and thrust screw rod, it is characterised in that：Main-gear box
Output shaft be hollow output shaft, its end is provided with internal spline, and the positioning hole being distributed before and after two is provided with hollow output shaft, fixed
The diameter in position hole is less than the internal diameter of hollow output shaft；Thrust screw rod front portion is provided with thrust spiral, and rear portion is positioning neck, and positioning neck is last
End is provided with the external splines that match with internal spline in hollow output shaft, positions and is additionally provided with two sections of raised axle journals on neck, they and sky
Positioning hole is corresponding in heart output shaft, and the diameter of raised axle journal is more than the diameter of anterior thrust spiral, and less than end external splines
Diameter；The distal end faces of hollow output shaft are furnished with adjusting pad and rear pressing cover, and front end is furnished with the outer gear sleeve containing endoporus, outer gear sleeve
Endoporus be more than thrust spiral diameter；After thrust screw rod front portion thrust spiral passes through outer gear sleeve endoporus, the projection of neck is positioned
Axle journal is placed in the positioning hole of hollow output shaft, and the external splines of latter end engages with the internal spline in hollow output shaft, and adjusting pad leads to
The end face that bolt is fixedly mounted on thrust screw rod is crossed, rear pressing cover passes through equally distributed inner ring bolt and adjusting pad and thrust screw rod
Connection, while be connected by equally distributed outer ring bolt with hollow output shaft end face；Swivel joint pass through successively rear pressing cover and
Adjusting pad is connected with thrust screw rod, and its water inlet and water return outlet are linked up with the cyclic water channel in thrust screw rod respectively.
2. single screw extrusion machine main-gear box assembly according to claim 1, it is characterised in that：Main-gear box includes parallel
Input gear axle, double reduction gearing axle and the described hollow output shaft of setting, they by bearings in casing, its
In, deceleration gear wheel is equipped with double reduction gearing axle, they are fixedly mounted on corresponding reduction gear shaft by key, empty
Output gear wheel is installed with by key on heart output shaft；Input gear axle engages with first reduction gear wheel, the first order
Reduction gear shaft engages with second level deceleration gear wheel, and second level reduction gear shaft engages with output gear wheel；Swivel joint from
Rear pressing cover and adjusting pad center are connected after passing through by the screw thread of matching with thrust screw rod distal end faces.
3. single screw extrusion machine main-gear box assembly according to claim 2, it is characterised in that：Positioned at hollow output shaft end
The spring bearing at end is cylinder roller bearing, and the spring bearing positioned at hollow output shaft front end is followed successively by thrust axis from inside to outside
Hold and cylinder roller bearing；Seam positioning on the axle journal and casing that described thrust bearing passes through hollow output shaft.
4. the application of a kind of main-gear box assembly as described in one of claim 1-3, it is characterised in that rubber industry extrudes glue
The material inlet of unit equipment at least configures the material conveyor of an assembly of main-gear box containing single screw extrusion machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610246106.9A CN105673818B (en) | 2016-04-20 | 2016-04-20 | Single screw extrusion machine main-gear box assembly and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610246106.9A CN105673818B (en) | 2016-04-20 | 2016-04-20 | Single screw extrusion machine main-gear box assembly and its application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105673818A CN105673818A (en) | 2016-06-15 |
| CN105673818B true CN105673818B (en) | 2018-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610246106.9A Active CN105673818B (en) | 2016-04-20 | 2016-04-20 | Single screw extrusion machine main-gear box assembly and its application |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606064A (en) * | 2017-09-18 | 2018-01-19 | 南京宁嘉机电有限公司 | Gear-box for single screw extrusion machine |
| CN108119612A (en) * | 2018-02-06 | 2018-06-05 | 宜兴市台科实业有限公司 | A kind of efficient single-screw extruder gearbox |
| CN110271163A (en) * | 2019-07-16 | 2019-09-24 | 南京宁嘉机电有限公司 | Screw extruder gear case assembly and screw extruder |
| CN114719009B (en) * | 2022-06-09 | 2022-08-19 | 常州海特赐仁传动科技有限公司 | Transmission device based on electric appliance spline shaft |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0071159A1 (en) * | 1981-07-31 | 1983-02-09 | Windmöller & Hölscher | Feed hopper part of a single screw extruder |
| JPS608013A (en) * | 1983-06-28 | 1985-01-16 | Mitsubishi Heavy Ind Ltd | Adjuster of screw movement in screw kneader |
| JP3321452B2 (en) * | 2000-02-15 | 2002-09-03 | 住友重機械工業株式会社 | Electric injection molding machine |
| DE10113644A1 (en) * | 2001-03-21 | 2002-09-26 | Zahnradwerk Koellmann Gmbh | Spur gear transmission unit for a single screw extruder has a symmetrical housing with shaft bearings in end faces and a thrust bearing for the driven shaft in a separate housing on one end face |
| CN200958584Y (en) * | 2006-09-25 | 2007-10-10 | 南京高精齿轮集团有限公司 | Outputting mechanism of main speed reducer for single-srew extruder |
| DE102008026806B4 (en) * | 2008-06-05 | 2010-12-23 | Sew-Eurodrive Gmbh & Co. Kg | drive |
| CN202176699U (en) * | 2011-07-27 | 2012-03-28 | 南京盖因特机电有限责任公司 | Long shaft output shaft structure of three-shaft transmission system of equidirectional parallel double-screw extrusion machine |
| CN202241891U (en) * | 2011-09-02 | 2012-05-30 | 江阴齿轮箱制造有限公司 | Speed reducer for plastic single-screw extruder |
| CN205618641U (en) * | 2016-04-20 | 2016-10-05 | 南京宁嘉机电有限公司 | Single screw extruder owner gear box assembly |
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2016
- 2016-04-20 CN CN201610246106.9A patent/CN105673818B/en active Active
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| CN105673818A (en) | 2016-06-15 |
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Effective date of registration: 20190930 Address after: Jiangsu province Nanjing City Xijing road 211151 Jiangning economic and Technological Development Zone Co-patentee after: Nanjing High Precision Transmission Equipment Manufacturing Group Co., Ltd. Patentee after: Nanjing Ningjia Machinery & Electronics Co., Ltd. Address before: Airport Industrial Park in Jiangsu province Nanjing City Xijing road 211153 Jiangning economic and Technological Development Zone Patentee before: Nanjing Ningjia Machinery & Electronics Co., Ltd. |
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Effective date of registration: 20200507 Address after: No. 79 Jianheng Road, Jiangning District, Nanjing City, Jiangsu Province, 210000 Patentee after: NANJING HIGH-SPEED & ACCURATE GEAR GROUP Co.,Ltd. Address before: Jiangsu province Nanjing City Xijing road 211151 Jiangning economic and Technological Development Zone Co-patentee before: Nanjing High Precision Transmission Equipment Manufacturing Group Co., Ltd. Patentee before: NANJING NINGJIA ELECTROMECHANICAL Co.,Ltd. |
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