CN1972083A - Automobile alternator integral pulley assembly - Google Patents
Automobile alternator integral pulley assembly Download PDFInfo
- Publication number
- CN1972083A CN1972083A CNA2006100971472A CN200610097147A CN1972083A CN 1972083 A CN1972083 A CN 1972083A CN A2006100971472 A CNA2006100971472 A CN A2006100971472A CN 200610097147 A CN200610097147 A CN 200610097147A CN 1972083 A CN1972083 A CN 1972083A
- Authority
- CN
- China
- Prior art keywords
- needle roller
- mandrel
- outer ring
- ring
- dust
- 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
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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/001—Integrated brakes or clutches for stopping or coupling the relatively movable parts
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/28—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with two or more rows of rollers
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/50—Other types of ball or roller bearings
- F16C19/505—Other types of ball or roller bearings with the diameter of the rolling elements of one row differing from the diameter of those of another row
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/581—Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
- F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pulleys (AREA)
Abstract
This invention relates to one airmobile alternating motor integral slides bus with imbed single clutch, which is fixed on end of rotation axis and to drive automobile alternating moor through hook wireless joint band between the drive band wheels of the axis end. This invention is one integration structure outer ring composed of clutch outer ring, front supportive ring and back supportive ring.
Description
Technical field
The present invention relates to the automobile alternator integral pulley assembly of built-in one-way clutch, be fixed in the end of AC generator for vehicle rotating shaft, and be fixed between the drive pulley of engine crankshaft end, by hanging endless belt, drive above-mentioned AC generator for vehicle.
Background technology
In order to satisfy the powerful requirement of AC generator for vehicle, pulley assembly more and more obtains the concern of numerous main engine plants as the most feasible solution that realizes this function.At present, what domestic automobile current generator adopted is simple belt pulley, do not contain one-way clutch, under the requirement that automobile electrical power increases, easily produce skidding, cause that car load can't operate as normal, main cause is to consider the whole train life-span of automobile engine periphery, comprise belt and idle pulley, engine drives generator work by train, when engine quits work, because whole train is a slave unit, the belt pulley that comprises generator, and generator is because the effect of rotator inertia, still can be rotated further, in this case, the belt pulley that is used for transmission can be suddenly by tightly fluffing, like this, because the applying working condition of automobile, the state that has continual operation or stop, whole train is in all the time by tightly fluffing, become tight inotropic state by pine, very easily damage the idle pulley of belt and train, this situation is particularly evident in diesel engine, mainly be because since diesel engine to lack than petrol engine from the time that rated speed transfers to rapidly, impact is just big more like this, and simultaneously, the vibration of Diesel engine is much larger than petrol engine.Because the power demand of generator increases, make the moment of inertia of generator also increase (rotor weight continues to increase), can't shut down in short time, but this moment, engine quit work, so also cause impact (belt pulley and the generator shaft that adopts is to be rigidly connected at present, the existence of no relative motion) to train.At the problems referred to above, in recent years, the such technical scheme of external proposition, when the translational speed of endless belt is in certain or rising trend, can be freely from endless belt to the rotating shaft transferring power, and, the translational speed of endless belt is in when descending tendency, driven pulley and rotating shaft can freely counterrotating alternating current generator with the scheme of the pulley apparatus of built-in one-way clutch, open clear 56-101353 as the Japan Patent spy, Te Kaiping 7-317807, same 8-61443, same 10-285873, special fair 7-72585, the spy opens 2001-82586, French Patent (FRP) FR2726059A1 etc., and the such alternating current generator of a part is actually used with the pulley apparatus of built-in one-way clutch.The spy opens 2001-82586 disclosed " alternating current generator with the belt pulley of built-in one-way clutch ", it is the technical scheme that generating efficiency is higher and the endless belt life-span is long in the technique scheme, as shown in Figure 1, it adopts on the rotating shaft of alternating current generator, outside suit fixing mandrel freely; This mandrel around with the concentric driven pulley that is provided with of this mandrel; Between the axial pars intermedia of the inner headed face of the axial pars intermedia of mandrel periphery and driven pulley, only this driven pulley with respect to above-mentioned mandrel when the defined direction is inclined in relative rotation, the one-way clutch that can freely transmit of the rotatory force between driven pulley and the mandrel; At the state of clamping this one-way clutch from axial two ends, between the inner headed face of the periphery of above-mentioned mandrel and driven pulley, supporting the radial load that loads on this driven pulley, can make this mandrel and driven pulley can freedom 1 pair of block bearing in relative rotation.Above-mentioned one-way clutch and block bearing adopt the mode of interference fit to be sleeved on the mandrel, and the magnitude of interference of block bearing and driven pulley can directly have influence on the axial location precision of train, thereby causes the effective length disunity of transfer torque; Secondly, also be to adopt interference fit between one-way clutch and mandrel, this structure can satisfy instructions for use when running car when road conditions are preferably on the highway, but, when running car is on the bad road of road conditions, such as rugged mountain path etc., failure phenomenon can appear skidding between one-way clutch and mandrel; In addition, its block bearing outer end is not provided with dust seal, and the road conditions perfect condition, has dust and enters block bearing and influence useful life when road conditions are comparatively abominable along using in the vehicle traveling process.
Summary of the invention
The technical problem to be solved in the present invention is: use in the pulley assembly owing to there is not axial location reliably between one-way clutch and block bearing and mandrel at existing AC generator for vehicle, and influence the axial location precision of whole train, thereby cause the effective length disunity of transfer torque; The failure phenomenon that skids can appear between one-way clutch and mandrel; When road conditions are comparatively abominable, have dust in the vehicle traveling process and enter block bearing and influence deficiency such as useful life.The invention provides a kind of automobile alternator integral pulley assembly, the effective length of this pulley assembly transfer torque is unified, failure phenomenon, long service life can not occur between unidirectional mechanism and mandrel.
The technical solution adopted for the present invention to solve the technical problems is: a kind of automobile alternator integral pulley assembly, mandrel with the rotating shaft end that is fixedly set in alternating current generator, outside the mandrel circumference with the concentric driven pulley that is provided with of this mandrel, between mandrel and driven pulley, be provided with one-way clutch, preceding block bearing and rear trunnion hold, preceding block bearing and rear trunnion hold the front-end and back-end that are separately positioned on one-way clutch, one-way clutch, preceding block bearing and rear trunnion hold all outer ring and inner ring, the outer ring of one-way clutch, before the outer ring of block bearing and outer ring that rear trunnion holds all with the driven pulley interference fit, the outer ring of one-way clutch, the integral outer ring that the outer ring of preceding block bearing and the outer ring that rear trunnion holds are structure as a whole, there is the rib that is extended internally by integral outer ring at the integral outer ring two ends, the mandrel front portion is useful on the convex shoulder of integral outer ring's axial location, the inner ring of one-way clutch, the inner ring of preceding block bearing, inner ring and mandrel that rear trunnion holds are structure as a whole, and are respectively arranged with dust seal in the rear end that the front end and the rear trunnion of preceding block bearing holds between mandrel and driven pulley.The inner ring and the mandrel of the one-way clutch in the original structure are made of one structure, thereby have avoided the failure phenomenon that skids between one-way clutch and mandrel; The mandrel front portion is useful on the convex shoulder of integral outer ring's axial location, axial location precision height, and the effective length of transfer torque is unified.
Aforesaid one-way clutch has long needle roller and long cages for needle, long needle roller contacts with the inner headed face of integral outer ring and the periphery rolling of mandrel, long cages for needle is provided with the spring of the long needle roller of circumferencial direction elasticity pushing that equates with long needle roller quantity, be provided with the arc slope groove that equates with long needle roller quantity corresponding to long needle roller place on the mandrel periphery, arc slope groove axial length matches with long needle roller, and the radial spacing between the inner headed face of integral outer ring and the periphery of mandrel is at the diameter of non-arc slope groove less than long needle roller, at the diameter of arc slope groove groove depth maximum greater than long needle roller; Supporting needle roller before block bearing has before aforesaid, aforesaid rear trunnion holds has back supporting needle roller, preceding supporting needle roller contacts with the inner headed face of integral outer ring and the periphery rolling of mandrel respectively with back supporting needle roller, the diameter of long needle roller is greater than the diameter of preceding supporting needle roller, and the diameter of back supporting needle roller is greater than the diameter of long needle roller.
Aforesaid dust seal comprises dust ring and dust ring, and the driven pulley inner ring has the dust ring mounting groove, and dust ring is fitted in the dust ring mounting groove, and dust ring is fitted in the dust ring inner ring, and the dust ring inner ring cooperates with stem seal.Improve sealing property, avoided running car dust when abominable road conditions to enter bearing effectively, improved useful life.
For further improving sealing property, aforesaid dust ring has the end face seal lip.
The invention has the beneficial effects as follows that automobile alternator integral pulley assembly of the present invention is made the inner ring of the one-way clutch in original structure and mandrel all-in-one-piece, has effectively avoided the skidding between one-way clutch and mandrel; Axial location precision height, the effective length of transfer torque is unified, dust seal performance height, long service life is applicable to various road conditions.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the A-A cutaway view Amplified image of Fig. 1.
1. mandrels among the figure, 11. convex shoulders, 12. arc slope grooves, 2. driven pulley, 3. integral outer ring, 4. dust seal, 41. dust rings, 42. dust rings, 5. long needle roller, 6. long cages for needle, 7. spring, 8. before supporting needle roller, 9. back supporting needle roller.
Embodiment
As Fig. 1, automobile alternator integral pulley assembly of the present invention shown in 2, be cylindrical-shaped structure on the whole, mandrel 1 with the rotating shaft end that is sleeved on alternating current generator, on the mandrel 1 middle part inner headed face internal thread is arranged, be threaded with the rotating shaft of alternating current generator, on the mandrel 1 front end inner headed face internal spline is arranged, cooperate with the instrument of head band external splines, the rotating shaft that is used for mandrel 1 and alternating current generator assembles, outside mandrel 1 circumference with this mandrel 1 concentric driven pulley 2 that is provided with, between mandrel 1 and driven pulley 2, be provided with one-way clutch, preceding block bearing and rear trunnion hold, preceding block bearing and rear trunnion hold the front-end and back-end that are separately positioned on one-way clutch, one-way clutch, preceding block bearing and rear trunnion hold all outer ring and inner ring, the outer ring of one-way clutch, the integral outer ring 3 that the outer ring of preceding block bearing and the outer ring that rear trunnion holds are structure as a whole, integral outer ring 3 and driven pulley 2 interference fit, there is the rib that is extended internally by integral outer ring 3 at integral outer ring 3 two ends, mandrel 1 front portion is useful on the convex shoulder 11 of integral outer ring's 3 axial location, the inner ring of one-way clutch, the inner ring of preceding block bearing, inner ring that rear trunnion holds and mandrel 1 are structure as a whole, one-way clutch also has long needle roller 5 and long cages for needle 6, long needle roller 5 contacts with the inner headed face of integral outer ring 3 and the periphery rolling of mandrel 1, long cages for needle 6 is provided with the spring 7 of the long needle roller 5 of circumferencial direction elasticity pushing that equates with long needle roller 5 quantity, each spring 7 is to the long needle roller 5 of same direction pushing, as shown in Figure 2, spring 7 pushes long needle roller 5 to counterclockwise; Be provided with the arc slope groove 12 that equates with long needle roller 5 quantity corresponding to long needle roller 5 places on mandrel 1 periphery, arc slope groove 12 axial lengths match with long needle roller 5, radial spacing between the periphery of the inner headed face of integral outer ring 3 and mandrel 1 is the diameter less than long needle roller 5 at groove 12 places, non-arc slope, at the diameter of groove 12 groove depth maximums in arc slope greater than long needle roller 5, long cages for needle 6 can not relatively rotate with respect to mandrel 1, between driven pulley 2 and the alternating current generator rotating shaft, can only transmit the rotatory force of prescribed direction, in Fig. 2, suppose that mandrel 1 is fixing, only integral outer ring 3 rotates, so when integral outer ring 3 when clockwise direction rotates, the power that long needle roller 5 is subjected to owing to the inner headed face from integral outer ring 3, elastic force with resistance spring 7, move to the position that arc slope groove 12 groove depths deepen, long needle roller 5 just become can be in arc slope groove 12 can rotary state, 1 of integral outer ring 3 and mandrel just can not carry out the transmission of rotatory force, have promptly become to surmount state.On the contrary, when integral outer ring 3 when counter clockwise direction is rotated, long needle roller 5 is because the power that is subjected to from the inner headed face of integral outer ring 3 and the elastic force effect of spring 7, move to the position that arc slope groove 12 groove depths shoal, wedge-like ground is by wedging, integral outer ring 3 and mandrel 1 are combined into one, and 1 of integral outer ring 3 and mandrel just can freely transmit rotatory force, promptly become lock-out state.2 rear ends of holding at the front end and the rear trunnion of preceding block bearing of mandrel 1 and driven pulley are respectively arranged with dust seal 4, dust seal 4 comprises dust ring 41 and dust ring 42, driven pulley 2 inner rings have the dust ring mounting groove, dust ring 41 is fitted in the dust ring mounting groove, dust ring 42 is fitted in dust ring 41 inner rings, dust ring 42 inner rings and mandrel 1 are sealed and matched, and dust ring 42 has the end face seal lip.
Claims (4)
1. automobile alternator integral pulley assembly, mandrel (1) with the rotating shaft end that is fixedly set in alternating current generator, outside mandrel (1) circumference with the concentric driven pulley (2) that is provided with of this mandrel (1), between mandrel (1) and driven pulley (2), be provided with one-way clutch, preceding block bearing and rear trunnion hold, preceding block bearing and rear trunnion hold the front-end and back-end that are separately positioned on one-way clutch, one-way clutch, preceding block bearing and rear trunnion hold all outer ring and inner ring, the outer ring of one-way clutch, before the outer ring of block bearing and outer ring that rear trunnion holds all with driven pulley (2) interference fit, it is characterized in that: the outer ring of one-way clutch, the integral outer ring (3) that the outer ring of preceding block bearing and the outer ring that rear trunnion holds are structure as a whole, there is the rib that is extended internally by integral outer ring (3) at integral outer ring (3) two ends, mandrel (1) front portion is useful on the convex shoulder (11) of integral outer ring (3) axial location, the inner ring of one-way clutch, the inner ring of preceding block bearing, inner ring that rear trunnion holds and mandrel (1) are structure as a whole, and are respectively arranged with dust seal (4) in the rear end that the front end and the rear trunnion of preceding block bearing holds between mandrel (1) and driven pulley (2).
2. automobile alternator integral pulley assembly according to claim 1, it is characterized in that: described one-way clutch has long needle roller (5) and long cages for needle (6), long needle roller (5) contacts with the inner headed face of integral outer ring (3) and the periphery rolling of mandrel (1), long cages for needle (6) is provided with the spring (7) of the circumferencial direction elasticity long needle roller of pushing (5) that equates with long needle roller (5) quantity, locate to be provided with the arc slope groove (12) that equates with long needle roller (5) quantity corresponding to long needle roller (5) on mandrel (1) periphery, arc slope groove (12) axial length and long needle roller (5) match, and the radial spacing between the periphery of the inner headed face of integral outer ring (3) and mandrel (1) is located diameter less than long needle roller (5) at non-arc slope groove (12), at the diameter of arc slope groove (12) groove depth maximum greater than long needle roller (5); Supporting needle roller (8) before block bearing has before described, described rear trunnion holds has back supporting needle roller (9), preceding supporting needle roller (8) contacts with the inner headed face of integral outer ring (3) and the periphery rolling of mandrel (1) respectively with back supporting needle roller (9), the diameter of long needle roller (5) is greater than the diameter of preceding supporting needle roller (8), and the diameter of back supporting needle roller (9) is greater than the diameter of long needle roller (5).
3. automobile alternator integral pulley assembly according to claim 1, it is characterized in that: described dust seal (4) comprises dust ring (41) and dust ring (42), driven pulley (2) inner ring has the dust ring mounting groove, dust ring (41) is fitted in the dust ring mounting groove, dust ring (42) is fitted in dust ring (41) inner ring, and dust ring (42) inner ring and mandrel (1) are sealed and matched.
4. automobile alternator integral pulley assembly according to claim 3 is characterized in that: described dust ring (42) has the end face seal lip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100971472A CN100468917C (en) | 2006-10-25 | 2006-10-25 | Automobile alternator integral pulley assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100971472A CN100468917C (en) | 2006-10-25 | 2006-10-25 | Automobile alternator integral pulley assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1972083A true CN1972083A (en) | 2007-05-30 |
| CN100468917C CN100468917C (en) | 2009-03-11 |
Family
ID=38112733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100971472A Active CN100468917C (en) | 2006-10-25 | 2006-10-25 | Automobile alternator integral pulley assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100468917C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265968B (en) * | 2008-04-23 | 2010-09-29 | 江苏南方轴承股份有限公司 | Freestyle belt sheave |
| CN103541998A (en) * | 2012-07-13 | 2014-01-29 | Skf公司 | Mechanical system with one-way clutch and alternator comprising such a system |
| CN104485772A (en) * | 2015-01-08 | 2015-04-01 | 张志雄 | Disc type titanium alloy synchronous belt wheel motor |
| CN105980726A (en) * | 2014-02-11 | 2016-09-28 | 法雷奥电机设备公司 | Overrunning clutch cage and spring thereof having arms remote from the cage in the compressed position |
| FR3059171A1 (en) * | 2016-11-21 | 2018-05-25 | Valeo Equipements Electriques Moteur | PULLEY ASSEMBLY FOR ROTATING ELECTRICAL MACHINE |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561039B (en) * | 2009-05-20 | 2011-05-18 | 江苏南方轴承股份有限公司 | Pulley assembly of double bracing needle bearing |
-
2006
- 2006-10-25 CN CNB2006100971472A patent/CN100468917C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265968B (en) * | 2008-04-23 | 2010-09-29 | 江苏南方轴承股份有限公司 | Freestyle belt sheave |
| CN103541998A (en) * | 2012-07-13 | 2014-01-29 | Skf公司 | Mechanical system with one-way clutch and alternator comprising such a system |
| CN105980726A (en) * | 2014-02-11 | 2016-09-28 | 法雷奥电机设备公司 | Overrunning clutch cage and spring thereof having arms remote from the cage in the compressed position |
| CN104485772A (en) * | 2015-01-08 | 2015-04-01 | 张志雄 | Disc type titanium alloy synchronous belt wheel motor |
| FR3059171A1 (en) * | 2016-11-21 | 2018-05-25 | Valeo Equipements Electriques Moteur | PULLEY ASSEMBLY FOR ROTATING ELECTRICAL MACHINE |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100468917C (en) | 2009-03-11 |
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Owner name: JIANGSU SOUTHERN BEARING CO., LTD. Free format text: FORMER OWNER: SHI JIANWEI Effective date: 20081010 |
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Effective date of registration: 20081010 Address after: Spark North Road, hi tech Development Zone, Wujin District, Jiangsu, Changzhou Province, China: 213161 Applicant after: Jiangsu Nanfang Bearing Co.,Ltd. Address before: No. 1 Spark Road, Wujin hi tech Development Zone, Changzhou, Jiangsu Province, China: 213161 Applicant before: Shi Jianwei |
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Address after: 213000 Longxiang Road, Wujin high tech Development Zone, Changzhou City, Jiangsu Province Patentee after: Jiangsu Nanfang Precision Industry Co.,Ltd. Address before: 213161 Spark Road, hi tech Development Zone, Wujin District, Jiangsu, Changzhou Patentee before: Jiangsu Nanfang Bearing Co.,Ltd. |