CN112737280A - Electric power variable torque type new energy automobile differential mechanism - Google Patents
Electric power variable torque type new energy automobile differential mechanism Download PDFInfo
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- CN112737280A CN112737280A CN202110116432.9A CN202110116432A CN112737280A CN 112737280 A CN112737280 A CN 112737280A CN 202110116432 A CN202110116432 A CN 202110116432A CN 112737280 A CN112737280 A CN 112737280A
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- 230000007246 mechanism Effects 0.000 title claims description 24
- 238000004804 winding Methods 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000005192 partition Methods 0.000 claims description 10
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
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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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
- F16H2001/327—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear with orbital gear sets comprising an internally toothed ring gear
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to an electric power torque conversion type new energy automobile differential, wherein one end of a differential shell is rotatably connected with an input shaft, the other end of the differential shell is rotatably connected with an output shaft, and an output transmission assembly, a floating driving assembly and an input transmission assembly are sequentially arranged between the input shaft and the output shaft; the input transfer assembly includes a set of planetary gear sets; the sun gear is also coaxially and fixedly connected with a permanent magnet A; an annular stator core is arranged in the differential shell, and a stator winding is arranged on the stator core; the output transmission assembly comprises an output disc coaxially connected to the output shaft, a permanent magnet B is connected to the output disc, a conductive support ring is connected to the inner wall of the middle part of the differential shell in a sliding mode, a rotor core A is arranged on the outer surface of the conductive support ring, and a rotor core B is arranged on the inner ring of the conductive support ring; the floating driving assembly comprises an electromagnetic iron core which is vertically fixed at the end part of the support ring B; the floating drive assembly further comprises a permanent magnet C fixed to the front end of the conductive support ring.
Description
Technical Field
The invention relates to an electric power torque conversion type new energy automobile differential mechanism, and belongs to the field of new energy automobile transmission mechanisms.
Background
The existing automobile differential has huge weight and complex gear structure, and particularly for a new energy automobile, because a complex traditional structure is not needed, a motor can be directly arranged in front or behind the automobile differential, and output is carried out through a simpler speed change mechanism; the differential mechanism which is suitable for the new energy automobile and is directly driven by the motor can be designed to reduce the structural complexity and the weight of the chassis by benefiting from the driving principle of the new energy automobile; although in the prior art, a driving mechanism adopting a dual-motor design utilizes one set of electric control system to control two sets of motors designed in parallel and utilizes independent rotation control of the two sets of motors to realize output, in the process of slipping, the loads of the two sets of motors are different, the current control system can lead the slipping motor to rotate in an overspeed manner and overheat, and the trapped motor can lose enough power supply due to the overspeed rotation of the other set of motor in a magnetic resistance manner, thus leading the vehicle to be out of control; the electric control system with two sets of motors independent can solve the problems, but the cost is too high, and the electric control system cannot be suitable for some low-end vehicle types.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical problem in the prior art is solved, and the electric power torque conversion type new energy automobile differential is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an electric power torque conversion type new energy automobile differential mechanism comprises:
one end of the differential shell is rotatably connected with the input shaft, the other end of the differential shell is rotatably connected with the output shaft, and an output transmission assembly, a floating driving assembly and an input transmission assembly are sequentially arranged between the input shaft and the output shaft;
the input transmission assembly comprises a group of planetary gear sets, the outer sides of gear rings of the planetary gear sets are rotationally connected with the differential shell, the middle parts of the gear rings are coaxially fixed with the input shaft, and the middle parts of sun gears of the planetary gear sets are coaxially connected with a transfer shaft; a support ring A is also coaxially and fixedly connected to the sun gear, and a plurality of permanent magnets A are arranged on the support ring A in an annular array; a supporting ring B is fixed at the rotary connection position of the differential shell corresponding to the supporting ring A, an annular stator core is arranged in the supporting ring B, and a stator winding is arranged on the stator core;
the output transmission assembly comprises an output disc coaxially connected to an output shaft, an annular support ring C is vertically connected to the output disc, an annular permanent magnet B is arranged in the support ring C, a sliding support ring is arranged on the inner wall of the middle part of the differential shell, and an electric conduction support ring is connected to the inner wall of the sliding support ring in a sliding manner;
the floating driving assembly comprises an attraction ring vertically fixed at the end part of the support ring B, an annular electromagnetic iron core is arranged on the attraction ring, and an electromagnetic winding is arranged on the electromagnetic iron core; the floating driving assembly also comprises a pushing ring vertically fixed at the front end part of the conductive support ring, and a plurality of permanent magnets C are arranged on the pushing ring in an annular array; the electromagnetic winding drives the electromagnetic iron core to generate magnetic force to control the movement of the push ring; an annular partition plate is arranged at a position, corresponding to the position between the suction ring and the pushing ring, of the differential shell, an embedding groove A is formed in the partition plate, an annular embedding groove B is formed in the periphery of the front end of the conductive support ring, and a contraction spring is arranged between the embedding groove A and the embedding groove B;
the end part of the adapter shaft extends to the inner wall of the conductive support ring, a support block is fixed at the end part of the adapter shaft, and a plurality of permanent magnets D are arranged on the surface of the support block in an annular array.
As a further improvement of the invention, the transfer shaft is rotationally connected with the middle part of the suction ring.
As a further improvement of the invention, the transfer shaft is rotatably connected with the middle part of the partition plate.
As a further improvement of the invention, the conductive support ring comprises an inner frame and an outer frame, an air gap is arranged between the inner frame and the outer frame, and the inner frame and the outer frame are fixedly connected through a plurality of support ribs.
As a further improvement of the invention, an annular driving disc is fixedly connected to the input shaft, and a driving support ring is vertically connected to the driving disc; the driving support ring is positioned on the inner side of the support ring A, a toothed ring is arranged on the inner ring of the front half part of the driving support ring, a retainer is rotatably connected to the inner ring of the rear half part of the driving support ring, the middle part of the retainer is rotatably connected with the input shaft, a plurality of planetary gears are rotatably connected to the retainer, sun gears are meshed to the middle parts of the planetary gears, the end parts of the sun gears are coaxially connected with a support ring E, the outer ring of the support ring E is vertically connected with the support ring A, and a rotating support bearing is arranged between the support ring A and the driving support.
The invention has the beneficial effects that:
1. the input rotating speed of the differential mechanism is increased through the planetary gear set, the high rotating speed is input to the double-winding motor mechanism with the variable turns number, the double-winding motor mechanism controls the output torque transmission ratio control and the non-constant speed connection of the wheels on one side, a complex differential gear structure is eliminated through a simple transmission mechanism and an electromagnetic structure, the non-constant speed driving of the wheels on two sides is efficiently realized only by adopting one set of planetary gear, the input shaft can transmit electromagnetic force through the double-winding motor mechanism when the rotating speed of the wheel on one side is too high at the front end, so that the output shaft is dynamically driven to output power, and the higher the rotating speed of the wheel on one side is, the stronger the reverse thrust of the conductive support ring is realized, so that the.
2. The rotation support node of the adapter shaft is added, and the rotation stability of the adapter shaft is improved.
3. The inner frame and the outer frame are arranged separately, so that the mutual influence of the iron core of the inner frame part and the iron core of the outer frame part is reduced, the size of a single iron core is reduced, and the sensitivity of the mechanism and the conversion efficiency between electromagnetism and current are improved.
4. The sun gear and the gear ring are mutually nested and rotationally connected, so that the stability of the structure is improved, and the technical problem of poor stability of the planetary gear mechanism in a high-speed state is solved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. a differential housing; 2. an input shaft; 3. an output shaft; 4. a drive disc; 5. driving the support ring; 6. a holder; 7. a planetary gear; 8. a sun gear; 9. a support ring E; 10. a support ring A; 11. a support ring B; 12. a stator core; 13. a permanent magnet A; 14. a suction ring; 15. an electromagnetic core; 16. a transfer shaft; 17. a partition plate; 18. embedding the groove A; 19. a retraction spring; 20. an output tray; 21. a support ring C; 22. a permanent magnet B; 23. an outer frame; 24. an inner frame; 25. supporting ribs; 26. a rotor core A; 27. a rotor core B; 28. a support block; 29. a permanent magnet D; 30. a push ring; 31. a sliding support ring; 32. a raised key; 33. a permanent magnet C; 34. and embedding the groove B.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1, the present invention is an electric power torque conversion type new energy automobile differential, including:
one end of the differential shell is rotatably connected with the input shaft, the other end of the differential shell is rotatably connected with the output shaft, and an output transmission assembly, a floating driving assembly and an input transmission assembly are sequentially arranged between the input shaft and the output shaft;
the input transmission assembly comprises a group of planetary gear sets, an annular driving disc is fixedly connected to the input shaft, and a driving support ring is vertically connected to the driving disc; the driving support ring is positioned on the inner side of the support ring A, a toothed ring is arranged on the inner ring of the front half part of the driving support ring, a retainer is rotatably connected to the inner ring of the rear half part of the driving support ring, the middle part of the retainer is rotatably connected with the input shaft, a plurality of planetary gears are rotatably connected to the retainer, sun gears are meshed to the middle parts of the planetary gears, a transfer shaft is coaxially connected to the middle parts of the sun gears, the end parts of the sun gears are also coaxially connected with a support ring E, the outer ring of the support ring E is vertically connected with the support ring A, a rotating support bearing is arranged between the support ring A and the driving support ring, and a plurality of permanent; a supporting ring B is fixed at the rotary connection position of the differential shell corresponding to the supporting ring A, an annular stator core is arranged in the supporting ring B, and a stator winding is arranged on the stator core;
the output transmission assembly comprises an output disc coaxially connected to an output shaft, an annular support ring C is vertically connected to the output disc, an annular permanent magnet B is arranged in the support ring C, a sliding support ring is arranged on the inner wall of the middle part of the differential mechanism shell, a conductive support ring is connected to the inner wall of the sliding support ring in a sliding manner, the conductive support ring comprises an inner frame and an outer frame, an air gap is arranged between the inner frame and the outer frame, the inner frame and the outer frame are fixedly connected through a plurality of support ribs, a raised key which is connected to the inner wall of the sliding support ring in a sliding manner is arranged on the outer wall of the front half part of the outer frame, an annular rotor iron core A is arranged on the outer surface of the rear half part of the outer frame through a support ring D, a rotor winding A is arranged on the rotor iron, the rotor core B is provided with a rotor winding B, and corresponding windings between the rotor winding A and the rotor winding B are mutually connected;
the floating driving assembly comprises an attraction ring vertically fixed at the end part of the support ring B, the transfer shaft is rotationally connected with the middle part of the attraction ring, an annular electromagnetic iron core is arranged on the attraction ring, and an electromagnetic winding is arranged on the electromagnetic iron core; the floating driving assembly also comprises a pushing ring vertically fixed at the front end part of the conductive support ring, and a plurality of permanent magnets C are arranged on the pushing ring in an annular array; the electromagnetic winding drives the electromagnetic iron core to generate magnetic force to control the movement of the push ring; an annular partition plate is arranged at a position, corresponding to the position between the attraction ring and the pushing ring, of the differential shell, the transfer shaft is rotatably connected with the middle of the partition plate, an embedding groove A is formed in the partition plate, an annular embedding groove B is formed in the periphery of the front end of the conductive support ring, and a contraction spring is arranged between the embedding groove A and the embedding groove B;
the end part of the adapter shaft extends to the inner wall of the conductive support ring, a support block is fixed at the end part of the adapter shaft, and a plurality of permanent magnets D are arranged on the surface of the support block in an annular array;
when the differential mechanism is used, the input shaft is connected to the driving shaft of the wheel on one side, the wheel on the other side is connected to the output shaft, and differential motion is performed between the wheels through the differential mechanism; the stator winding of the stator core is connected to the battery through the controller and used for auxiliary driving, and meanwhile, the stator winding is also connected to the electromagnetic winding of the electromagnetic core;
when the mechanism works, firstly, the driving force of the wheel on one side can be input from the input shaft, then the speed is increased through the planetary gear set on the first stage, so that the sun gear rotates at high speed to drive the stator core on the support ring B to cut the magnetic force line of the permanent magnet A, the stator winding of the stator core generates current, the current outputs a certain amount of current to drive the electromagnetic core to generate magnetic force after passing through the controller, the whole conductive support ring is pushed to move towards the output shaft, the cutting sectional area between the permanent magnet B and the rotor core A can be changed in the moving process of the conductive support ring, the sun wheel rotating at high speed can drive the support block to rotate at high speed, so that the rotor core B cuts the permanent magnet D, the rotor winding B generates changed current, the changed current can generate a magnetic field with a stroke change on the rotor winding A of the rotor core A, and, the rotating speed of the rotor is determined by the cutting sectional area between the permanent magnet B and the rotor iron core A, the larger the sectional area is, the larger the speed is, and meanwhile, a group of planetary gear sets can be connected to the output shaft for speed reduction, so that a wheel on one side can obtain larger rotating torque; when the wheel on one side slips and rotates at a high speed, the wheel on one side can obtain larger torque, and meanwhile, the stator winding on the centering iron core can input certain current through the controller to assist the existing input shaft to output larger power.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides an electric power moment of transformation formula new energy automobile differential mechanism, characterized by includes:
one end of the differential shell is rotatably connected with the input shaft, the other end of the differential shell is rotatably connected with the output shaft, and an output transmission assembly, a floating driving assembly and an input transmission assembly are sequentially arranged between the input shaft and the output shaft;
the input transmission assembly comprises a group of planetary gear sets, the outer sides of gear rings of the planetary gear sets are rotationally connected with the differential shell, the middle parts of the gear rings are coaxially fixed with the input shaft, and the middle parts of sun gears of the planetary gear sets are coaxially connected with a transfer shaft; a support ring A is also coaxially and fixedly connected to the sun gear, and a plurality of permanent magnets A are arranged on the support ring A in an annular array; a supporting ring B is fixed at the rotary connection position of the differential shell corresponding to the supporting ring A, an annular stator core is arranged in the supporting ring B, and a stator winding is arranged on the stator core;
the output transmission assembly comprises an output disc coaxially connected to an output shaft, an annular support ring C is vertically connected to the output disc, an annular permanent magnet B is arranged in the support ring C, a sliding support ring is arranged on the inner wall of the middle part of the differential shell, and an electric conduction support ring is connected to the inner wall of the sliding support ring in a sliding manner;
the floating driving assembly comprises an attraction ring vertically fixed at the end part of the support ring B, an annular electromagnetic iron core is arranged on the attraction ring, and an electromagnetic winding is arranged on the electromagnetic iron core; the floating driving assembly also comprises a pushing ring vertically fixed at the front end part of the conductive support ring, and a plurality of permanent magnets C are arranged on the pushing ring in an annular array; the electromagnetic winding drives the electromagnetic iron core to generate magnetic force to control the movement of the push ring; an annular partition plate is arranged at a position, corresponding to the position between the suction ring and the pushing ring, of the differential shell, an embedding groove A is formed in the partition plate, an annular embedding groove B is formed in the periphery of the front end of the conductive support ring, and a contraction spring is arranged between the embedding groove A and the embedding groove B;
the end part of the adapter shaft extends to the inner wall of the conductive support ring, a support block is fixed at the end part of the adapter shaft, and a plurality of permanent magnets D are arranged on the surface of the support block in an annular array.
2. The differential mechanism of the electric power torque conversion type new energy automobile as claimed in claim 1, characterized in that: the transfer shaft is rotationally connected with the middle part of the suction ring.
3. The differential mechanism of the electric power torque conversion type new energy automobile as claimed in claim 1, characterized in that: the transfer shaft is rotatably connected with the middle part of the partition plate.
4. The differential mechanism of the electric power torque conversion type new energy automobile as claimed in claim 1, characterized in that: the conductive support ring comprises an inner frame and an outer frame, an air gap is arranged between the inner frame and the outer frame, and the inner frame and the outer frame are fixedly connected through a plurality of support ribs.
5. The differential mechanism of the electric power torque conversion type new energy automobile as claimed in claim 1, characterized in that: the input shaft is fixedly connected with an annular driving disc, and the driving disc is vertically connected with a driving support ring; the driving support ring is positioned on the inner side of the support ring A, a toothed ring is arranged on the inner ring of the front half part of the driving support ring, a retainer is rotatably connected to the inner ring of the rear half part of the driving support ring, the middle part of the retainer is rotatably connected with the input shaft, a plurality of planetary gears are rotatably connected to the retainer, sun gears are meshed to the middle parts of the planetary gears, the end parts of the sun gears are coaxially connected with a support ring E, the outer ring of the support ring E is vertically connected with the support ring A, and a rotating support bearing is arranged between the support ring A and the driving support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110116432.9A CN112737280B (en) | 2021-01-21 | 2021-01-21 | Electric power torque-changing type new energy automobile differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110116432.9A CN112737280B (en) | 2021-01-21 | 2021-01-21 | Electric power torque-changing type new energy automobile differential mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112737280A true CN112737280A (en) | 2021-04-30 |
| CN112737280B CN112737280B (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110116432.9A Active CN112737280B (en) | 2021-01-21 | 2021-01-21 | Electric power torque-changing type new energy automobile differential mechanism |
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| Country | Link |
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| CN (1) | CN112737280B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491196A (en) * | 2020-11-20 | 2021-03-12 | 无锡南洋职业技术学院 | New energy automobile variable power motor |
| CN114778987A (en) * | 2022-05-16 | 2022-07-22 | 国网四川省电力公司眉山供电公司 | Dry-type reactor fault analysis device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1747284A (en) * | 2005-08-08 | 2006-03-15 | 浙江华辰电器股份有限公司 | Dual-speed motor with dynamic output |
| CN104377917A (en) * | 2014-12-10 | 2015-02-25 | 哈尔滨工业大学 | Radial-axial magnetic field electromagnetic planetary gear power divider |
| CN109163065A (en) * | 2018-09-26 | 2019-01-08 | 吉林大学 | A kind of decoupling wheel hem retarding mechanism suitable for distributed electric drive automobile |
| CN109863052A (en) * | 2016-11-02 | 2019-06-07 | 秦内蒂克有限公司 | Drive configuration |
-
2021
- 2021-01-21 CN CN202110116432.9A patent/CN112737280B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1747284A (en) * | 2005-08-08 | 2006-03-15 | 浙江华辰电器股份有限公司 | Dual-speed motor with dynamic output |
| CN104377917A (en) * | 2014-12-10 | 2015-02-25 | 哈尔滨工业大学 | Radial-axial magnetic field electromagnetic planetary gear power divider |
| CN109863052A (en) * | 2016-11-02 | 2019-06-07 | 秦内蒂克有限公司 | Drive configuration |
| CN109163065A (en) * | 2018-09-26 | 2019-01-08 | 吉林大学 | A kind of decoupling wheel hem retarding mechanism suitable for distributed electric drive automobile |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491196A (en) * | 2020-11-20 | 2021-03-12 | 无锡南洋职业技术学院 | New energy automobile variable power motor |
| CN114778987A (en) * | 2022-05-16 | 2022-07-22 | 国网四川省电力公司眉山供电公司 | Dry-type reactor fault analysis device |
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| Publication number | Publication date |
|---|---|
| CN112737280B (en) | 2023-12-29 |
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Effective date of registration: 20231121 Address after: 730070 No. 1, Fuxing Road, liujiabao street, Anning District, Lanzhou City, Gansu Province Applicant after: Super high voltage company of State Grid Gansu Electric Power Co. Address before: No. 390, Guangrui Road, Liangxi District, Wuxi City, Jiangsu Province, 214000 Applicant before: WUXI OPEN University |
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