CN102797808B - Speed control system - Google Patents
Speed control system Download PDFInfo
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- CN102797808B CN102797808B CN 201210048349 CN201210048349A CN102797808B CN 102797808 B CN102797808 B CN 102797808B CN 201210048349 CN201210048349 CN 201210048349 CN 201210048349 A CN201210048349 A CN 201210048349A CN 102797808 B CN102797808 B CN 102797808B
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- planet carrier
- driving wheel
- transmission shaft
- central gear
- speed
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- 239000000969 carrier Substances 0.000 claims abstract description 84
- 230000005540 biological transmission Effects 0.000 claims abstract description 59
- 230000000295 complement Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000001105 regulatory Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000875 corresponding Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 230000023298 conjugation with cellular fusion Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000003068 static Effects 0.000 description 1
- 230000021037 unidirectional conjugation Effects 0.000 description 1
Abstract
The invention discloses a speed control system. The speed control system comprises a driving wheel, a planetary gear mechanism, and a transmission shaft which penetrates through the driving wheel and a center wheel sequentially, wherein the transmission shaft is provided with a connecting piece. The speed control system also comprises a gear shifting device used for adjusting output rotating speed. The driving wheel operates by applying an acting force and transfers the acting force to the transmission shaft through the center wheel or a planetary carrier, and the transmission shaft outputs power. As the gear shifting device is additionally arranged in the speed control system, the transmission modes among the driving wheel, the center wheel, the planetary carrier and the transmission shaft can be adjusted through the gear shifting device according to different operation needs, and then the output rotating speed of the transmission shaft is adjusted without consuming much acting forceso as to reduce the amount of labor. Moreover, the speed control system adopts mechanical transmission mode for adjusting the speed, and is simple in structure, convenient in operation, good in stability, long in service life, and low in use and maintenance costs compared with speed adjustment by using a motor.
Description
Technical field
The present invention relates to a kind of speed variator system, be specifically related to a kind of mechanical variable speed system.
Background technique
Existing bicycle mainly is to make its operation by the people for applying active force, its speed becomes a cube ratio with the active force that human body applies, therefore, if will regulate the vehicle forward velocity, just need expend more active force, the amount of labour is bigger, and the electric bicycle that occurs on the existing market can carry out real-time speed regulating as required, but it mainly is the operation speed governing that realizes vehicle by the rotational velocity of regulating motor, the damage once motor breaks down, electric bicycle then is difficult to normal operation, influences the use of daily life, and replacing and the maintenance cost of motor are higher.
And most of lathes are as drilling machine, milling machine, lathe etc., mainly be to adopt to change belt pulley and carry out speed change, and this method inconvenient operation that wastes time and energy, working efficiency is lower.
Also have a kind of mechanical variable speed device in the prior art, be specially the dual-clutch gear-shifting speed governing, but there are serious wearing and tearing in it when gearshift and transmission, energy consumption is serious, and noise is bigger, and working life is lower.
Therefore, a kind of real-time speed regulating of realizing equipment such as vehicle or lathe, simple in structure, easy to operate, reduce the amount of labour, and the lower speed variator system of user cost is demanded occurring urgently.
Summary of the invention
Mainly be the speed of regulating vehicle operating by artificial acting for solving traditional vehicle, the amount of labour is bigger, and the electric motor car on the existing market adopts motor to carry out speed governing or adopts the double clutch speed governing, serious wear, fragile, replacing and maintenance cost are all higher, most of machine adopted are changed the belt pulley speed change in addition, problems such as working efficiency is lower, the invention discloses a kind of speed variator system, to reach the motion speed of effectively regulating equipment such as vehicle or lathe according to concrete needs, reduce the amount of labour, easy to operate, the purpose of minimizing user cost.
For achieving the above object, technological scheme of the present invention is as follows:
A kind of speed variator system comprises drive unit, arrangements for speed regulation and output unit, and described drive unit is driving wheel; Described arrangements for speed regulation are planetary gears, and described planetary gears comprises central gear, planet wheel, planet carrier and gear ring, and described gear ring is fixed;
Described output unit is for running through the transmission shaft of described driving wheel and described central gear successively, and described transmission shaft is provided with the link that is in transmission connection with described central gear or described planet carrier;
Described speed variator system also comprises by described driving wheel is switched the gearshift that is connected to regulate output speed with described central gear or described planet carrier.
Preferably, described link is at least one section axle external splines that is arranged on the described transmission shaft.
Preferably, described axle external splines is two sections that are distributed on the described transmission shaft, and the output terminal of described planet carrier and the input end of described central gear are provided with the internal spline that is complementary with described axle external splines, are respectively first internal spline and second internal spline; The input end of described planet carrier and the input end of described central gear are provided with external splines, are respectively first external splines and second external splines, and the output terminal of described driving wheel is provided with the driving wheel internal spline that is complementary with described external splines.
Preferably, described speed variator system also comprises the positioning means with described central gear and described planet carrier longitudinal register.
Preferably, described positioning means comprises the position limit pin that is fixedly set on the described central gear, and the inner groovy that is positioned at described planet carrier input end inboard, and described position limit pin can be along described inner groovy circumferential running.
Preferably, described gearshift comprises for the push rod that promotes described planet carrier, and the position-limit mechanism that is used for the described push rod stroke of restriction.
Preferably, described gear ring is provided with through hole, and described position-limit mechanism comprises the screens element that is arranged at the limited impression on the described push rod and is positioned at described through hole, and described limited impression is at least 2.
Preferably, described screens element comprises spring and steel ball.
Preferably, the front end of described push rod also is provided with shift fork, and the output terminal arranged outside of described planet carrier has outer groove, and described shift fork stretches in the described outer groove.
Preferably, described shift fork is sector structure.
Speed variator system disclosed by the invention comprises driving wheel, planetary gears and the transmission shaft that runs through described driving wheel and central gear successively, and described transmission shaft is provided with link; Speed variator system also comprises for the gearshift of regulating output speed.Make driving wheel turn round by applying active force, driving wheel is given transmission shaft by central gear or planet carrier with force transmission, and transmission shaft is exported power.Owing to added gearshift in the speed variator system, according to different operation needs, by the kind of drive between gearshift adjusting driving wheel, central gear, planet carrier and transmission shaft, and then the output speed of adjusting transmission shaft, need not to consume more active force, reduced the amount of labour, and the present invention carries out speed governing for mechanical drive mode, simple in structure, easy to operate, stability is better, and working life is longer, relative motor speed-regulating, use and maintenance cost are lower.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technological scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of speed variator system disclosed by the invention;
Fig. 2 is the structural representation of driving wheel in a kind of speed variator system disclosed by the invention;
Fig. 3 is the structural representation of central gear in a kind of speed variator system disclosed by the invention;
Fig. 4 is the structural representation of planet carrier in a kind of speed variator system disclosed by the invention;
Fig. 5 is the structural representation of transmission shaft in a kind of speed variator system disclosed by the invention;
Fig. 6 is the structural representation that push rod cooperates with gear ring in a kind of speed variator system disclosed by the invention.
The title of the numeral among the figure or the corresponding part of alphabetical representative:
1, driving wheel 2, central gear 3, planet carrier 4, planet wheel 5, gear ring 6, transmission shaft 7, push rod;
11, driving wheel internal spline;
21, second internal spline 22, second external splines 23, position limit pin;
31, first internal spline 32, first external splines 33, inner groovy 34, outer groove;
51, through hole 52, screens element 53, groove;
61, axle first external splines 62, axle second external splines;
71, shift fork 72, limited impression.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technological scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment who obtains under the creative work prerequisite.
The invention discloses a kind of speed variator system, to reach the motion speed of effectively regulating equipment such as vehicle or lathe according to concrete needs, reduce the amount of labour, easy to operate, the purpose of minimizing user cost.
Shown in Fig. 1-6, a kind of speed variator system comprises drive unit, arrangements for speed regulation and output unit, and drive unit is driving wheel 1; Arrangements for speed regulation are planetary gears, and planetary gears comprises central gear 2, planet wheel 4, planet carrier 3 and gear ring 5, and gear ring 5 maintains static; The input end of planet carrier 3 is provided with the circular hole (not shown), and central gear 2 passes the output terminal of planet carrier 3, make central gear 2 stretch in the circular hole and rotational fixation on planet carrier 3, be meshed with planet wheel 4 on the planet carrier 3.
Output unit is for running through the transmission shaft 6 of driving wheel 1 and central gear 2 successively, and transmission shaft 6 is provided with the link that is in transmission connection with central gear 2 or planet carrier 3;
Speed variator system also comprises by driving wheel is switched the gearshift that is connected to regulate output speed with central gear or planet carrier.
Make driving wheel 1 running by applying active force, driving wheel 1 is given transmission shaft 6 by central gear 2 or planet carrier 3 with force transmission, and transmission shaft 6 is exported power.Owing to added gearshift in the speed variator system, according to different operation needs, by the kind of drive between gearshift adjusting driving wheel, central gear, planet carrier and transmission shaft, and then the output speed of adjusting transmission shaft, need not to consume more active force, reduced the amount of labour, and the present invention carries out speed governing for mechanical drive mode, simple in structure, easy to operate, stability is better, and working life is longer, relative motor speed-regulating, use and maintenance cost are lower.
Link is at least one section axle external splines that is arranged on the transmission shaft 6, the axle external splines is two sections that are distributed on the transmission shaft 6, be respectively axle first external splines 61 that is positioned at driving wheel 1 one sides and axle second external splines 62 that is positioned at planet carrier 3 one sides, the input end of the output terminal of planet carrier 3 and central gear 2 is provided with the internal spline that is complementary with the axle external splines, is respectively first internal spline 31 and second internal spline 21; The input end of the input end of planet carrier 3 and central gear 2 is provided with external splines, is respectively first external splines 32 and second external splines 22, and the output terminal of driving wheel 1 is provided with the driving wheel internal spline 11 that is complementary with external splines.
The one or both ends of transmission shaft are provided with the output spline, are connected with equipment by the output spline, and power is exported.
Speed variator system also comprises the positioning means of central gear 2 with planet carrier 3 longitudinal registers.Positioning means comprises the position limit pin 23 that is fixedly set on the central gear 2, and the inner groovy 33 that is positioned at planet carrier 3 input end inboards, and position limit pin 23 can be along inner groovy 33 circumferential runnings.Central gear 2 stretches in the circular hole of planet carrier.By position limit pin and inner groovy mating reaction are set, in the vertical central gear and planet carrier are effectively located on the one hand, can make central gear vertically moving and move with planet carrier, on the other hand, because the rotational velocity of central gear and planet carrier is inconsistent, to guarantee the two normal operation in a circumferential direction, do not produce mutual interference.
In addition, except arranging at central gear position limit pin positions, also can catch be set at central gear and position, catch can be sector structure, and concentric with inner groovy, to guarantee the normal operation between central gear and planet carrier, the structural type of positioning means does not limit at this.
Gearshift comprises for the push rod 7 that promotes planet carrier 3, and the position-limit mechanism that is used for restriction push rod 7 strokes.Gear ring 5 is provided with through hole 51, and position-limit mechanism comprises the limited impression 72 that is arranged on the push rod 7 and the screens element 52 that is positioned at through hole 51, is provided with groove 53 with the through hole corresponding position on the gear ring, and screens element 52 is fixedly set in the groove.Limited impression 72 is at least 2.By the effect of cooperatively interacting of limited impression and screens element, push rod is carried out the restriction of different strokes, realize that the gearshift of planet carrier and central gear is moved, by being set, the screens element make operator can clearly understand gear, so that operation.Screens element 52 comprises spring and steel ball.By to the compression of spring and reset and realize the effect of screens gearshift.Wherein also can directly at gear ring the convex edge that is complementary with limited impression be set, the edge of convex edge is arc, is convenient to clamping and the disengaging of limited impression, is convenient to gear shift operation.
The front end of push rod 7 also is provided with shift fork 71, and the output terminal arranged outside of planet carrier 3 has outer groove 34, and shift fork 71 stretches in the outer groove 34.By shift fork being stretched in the outer groove 34, it is fixing to make push rod and planet carrier vertically go up, planet carrier and central gear can with push rod vertically move and mobile, and shift fork is sector structure, with do not have interference on the circumferencial direction of planet carrier, the circumference that can not influence planet carrier rotates, and guarantees the normal operation of planet carrier.
Embodiment 1
The axle external splines is axle second external splines 62 that is arranged at planet carrier one end, and the limited impression 72 on the push rod is 2, and its concrete working principle is as follows:
One grade: limited impression 72 clampings that screens element 52 and push rod are previous, driving wheel internal spline 11 is meshed with second external splines 22 on the central gear 2, central gear 2 is vertically gone up relative fixed with planet carrier 3, first internal spline 31 of planet carrier output terminal and 62 engagements of axle second external splines, applied external force drives driving wheel 1 running, driving wheel 1 will rotate by central gear 2-planet wheel 4-planet carrier 3 and transmit successively, and planet carrier 3 passes to transmission shaft 6 with rotation at last, and transmission shaft 6 is exported power.
Second gear: push rod 7 promotes planet carrier 3 and moves with the direction of central gear 2 to driving wheel 1, one limited impression 72 clampings behind screens element 52 and the push rod, second external splines 22 breaks away from driving wheel internal spline 11, first external splines 32 of planet carrier 3 is meshed with driving wheel internal spline 11, central gear 2 is vertically gone up relative fixed with planet carrier 3, because axle second external splines 62 long enoughs, after push rod 7 promotion planet carriers move, first internal spline 31 of planet carrier output terminal still meshes with axle second external splines 62, applied external force drives driving wheel 1 running, driving wheel 1 is directly passed to planet carrier 3 with rotation, last planet carrier 3 passes to transmission shaft 6 with rotation, and transmission shaft 6 is exported power.
This embodiment has realized the replacing of two gears, and the instant speed change when being convenient to vehicle and travelling or effectively adjust the rotating speed of other equipment such as conversion lathe need not to consume more active force, has reduced the amount of labour.
Embodiment 2
All the other are identical with embodiment 1, difference is that the axle external splines is two sections that are distributed on the transmission shaft 6, is respectively axle first external splines 61 that is positioned at driving wheel 1 one sides and axle second external splines 62 that is positioned at planet carrier 3 one sides, limited impression 72 on the push rod 7 is 3, and its concrete working principle is as follows:
One grade: limited impression 72 clampings that screens element 52 and push rod are previous, driving wheel internal spline 11 is meshed with second external splines 22 on the central gear 2, central gear 2 is vertically gone up relative fixed with planet carrier 3, first internal spline 31 of planet carrier output terminal and 62 engagements of axle second external splines, applied external force drives driving wheel 1 running, driving wheel 1 will rotate by central gear 2-planet wheel 4-planet carrier 3 and transmit successively, and planet carrier 3 passes to transmission shaft 6 with rotation at last, and transmission shaft 6 is exported power.
Second gear: push rod 7 promotes planet carrier 3 and moves with the direction of central gear 2 to driving wheel 1, screens element 52 and middle limited impression 72 clampings of push rod, second external splines 22 on the central gear breaks away from driving wheel internal spline 11, first external splines 32 of planet carrier 3 is meshed with driving wheel internal spline 11, central gear 2 is vertically gone up relative fixed with planet carrier 3, because axle second external splines 62 long enoughs, after push rod 7 promotion planet carriers move, first internal spline 31 of planet carrier output terminal still meshes with axle second external splines 62, applied external force drives driving wheel 1 running, driving wheel 1 is directly passed to planet carrier 3 with rotation, last planet carrier 3 passes to transmission shaft 6 with rotation, and transmission shaft 6 is exported power.
Third gear: push rod 7 promotes planet carrier 3 to be continued to move with the direction of central gear 2 to driving wheel 1, limited impression 72 clampings behind screens element 52 and the push rod, at this moment, first internal spline 31 of planet carrier breaks away from axle second external splines 62, second internal spline 21 of central gear is meshed with axle first external splines 61, first external splines 32 of planet carrier is meshed with driving wheel internal spline 11, central gear 2 is vertically gone up relative fixed with planet carrier 3, applied external force drives driving wheel 1 running, driving wheel 1 is directly passed to planet carrier 3 with rotation, planet carrier passes to planet wheel 31-central gear 2 successively with power, last central gear 2 passes to transmission shaft 6 with rotation, and transmission shaft 6 is exported power.
This embodiment has realized the replacing of three gears, and the instant speed change when being convenient to vehicle and travelling or effectively adjust the rotating speed of other equipment such as conversion lathe need not to consume more active force, has reduced the amount of labour.
All there is chamfering in the splined end that above embodiment mentions, and the incision of being convenient to spline connects, and the two ends of transmission shaft all can be exported.
Locate to adopt between transmission shaft, driving wheel, central gear and the planet carrier spline fixedly connected outside, also can adopt gear connection etc., concrete Placement does not limit.
Speed variator system disclosed by the invention comprises driving wheel, planetary gears and the transmission shaft that runs through described driving wheel and central gear successively, and described transmission shaft is provided with link; Speed variator system also comprises for the gearshift of regulating output speed.Make driving wheel turn round by applying active force, driving wheel is given transmission shaft by central gear or planet carrier with force transmission, and transmission shaft is exported power.Owing to added gearshift in the speed variator system, according to different operation needs, by the kind of drive between gearshift adjusting driving wheel, central gear, planet carrier and transmission shaft, and then the output speed of adjusting transmission shaft, need not to consume more active force, reduced the amount of labour, and the present invention carries out speed governing for mechanical drive mode, simple in structure, easy to operate, stability is better, and working life is longer, relative motor speed-regulating, use and maintenance cost are lower.
More than be the description to the embodiment of the invention, by the above-mentioned explanation to the disclosed embodiments, make related domain professional and technical personnel can realize or use the present invention.Multiple modification to these embodiments will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiments shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a speed variator system is characterized in that, comprises drive unit, arrangements for speed regulation and output unit, and described drive unit is driving wheel; Described arrangements for speed regulation are planetary gears, and described planetary gears comprises central gear, planet wheel, planet carrier and gear ring, and described gear ring is fixed;
Described output unit is for running through the transmission shaft of described driving wheel and described central gear successively, and described transmission shaft is provided with the link that is in transmission connection with described central gear or described planet carrier;
Described speed variator system also comprises by described driving wheel is switched the gearshift that is connected to regulate output speed with described central gear or described planet carrier;
Described link is at least one section axle external splines that is arranged on the described transmission shaft, described axle external splines is two sections that are distributed on the described transmission shaft, the output terminal of described planet carrier and the input end of described central gear are provided with the internal spline that is complementary with described axle external splines, are respectively first internal spline and second internal spline; The input end of described planet carrier and the input end of described central gear are provided with external splines, are respectively first external splines and second external splines, and the output terminal of described driving wheel is provided with the driving wheel internal spline that is complementary with described external splines.
2. speed variator system according to claim 1 is characterized in that, described speed variator system also comprises the positioning means with described central gear and described planet carrier longitudinal register.
3. speed variator system according to claim 2, it is characterized in that, described positioning means comprises the position limit pin that is fixedly set on the described central gear, and the inner groovy that is positioned at described planet carrier input end inboard, and described position limit pin can be along described inner groovy circumferential running.
4. speed variator system according to claim 3 is characterized in that, described gearshift comprises for the push rod that promotes described planet carrier, and the position-limit mechanism that is used for the described push rod stroke of restriction.
5. speed variator system according to claim 4 is characterized in that, described gear ring is provided with through hole, and described position-limit mechanism comprises the screens element that is arranged at the limited impression on the described push rod and is positioned at described through hole, and described limited impression is at least 2.
6. speed variator system according to claim 5 is characterized in that, described screens element comprises spring and steel ball.
7. speed variator system according to claim 6 is characterized in that, the front end of described push rod also is provided with shift fork, and the output terminal arranged outside of described planet carrier has outer groove, and described shift fork stretches in the described outer groove.
8. speed variator system according to claim 7 is characterized in that, described shift fork is sector structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210048349 CN102797808B (en) | 2012-02-29 | 2012-02-29 | Speed control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210048349 CN102797808B (en) | 2012-02-29 | 2012-02-29 | Speed control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102797808A CN102797808A (en) | 2012-11-28 |
| CN102797808B true CN102797808B (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210048349 Expired - Fee Related CN102797808B (en) | 2012-02-29 | 2012-02-29 | Speed control system |
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| Country | Link |
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| CN (1) | CN102797808B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103465087B (en) * | 2013-09-23 | 2015-08-19 | 苏州江源精密机械有限公司 | A kind of main shaft speed change device of accessories mill-head |
| CN104235303B (en) * | 2014-10-08 | 2016-09-14 | 常州市瑞泰工程机械有限公司 | Operation gear-box |
| CN104747656A (en) * | 2015-03-18 | 2015-07-01 | 成都飞机工业（集团）有限责任公司 | Speed increasing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106923A (en) * | 1985-02-27 | 1986-08-27 | 株式会社阿真 | Has simple and easy cassette player corresponding to a plurality of outside output shafts of recording substance |
| CN201610925U (en) * | 2010-03-18 | 2010-10-20 | 武春海 | Electric automobile concentric shaft speed variator |
| CN202468870U (en) * | 2012-02-29 | 2012-10-03 | 张家港市九鼎机械有限公司 | Speed control system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007255642A (en) * | 2006-03-24 | 2007-10-04 | Aisin Ai Co Ltd | Planetary gear type transmission |
-
2012
- 2012-02-29 CN CN 201210048349 patent/CN102797808B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106923A (en) * | 1985-02-27 | 1986-08-27 | 株式会社阿真 | Has simple and easy cassette player corresponding to a plurality of outside output shafts of recording substance |
| CN201610925U (en) * | 2010-03-18 | 2010-10-20 | 武春海 | Electric automobile concentric shaft speed variator |
| CN202468870U (en) * | 2012-02-29 | 2012-10-03 | 张家港市九鼎机械有限公司 | Speed control system |
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| CN102797808A (en) | 2012-11-28 |
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Effective date of registration: 20150106 Address after: 215300, No. 335 middle Lu Bai Lu, Yushan Town, Suzhou City, Jiangsu, Kunshan Patentee after: Kunshan Dongda Zhihui Technology Consulting Co., Ltd. Address before: 215000, Daxin Industrial Zone, Zhangjiagang, Jiangsu, Suzhou Patentee before: Zhangjiagang Jiuding Machinery Co., Ltd. |
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