CN110645328B - Spherical surface structure stepless speed change device - Google Patents
Spherical surface structure stepless speed change device Download PDFInfo
- Publication number
- CN110645328B CN110645328B CN201910935412.7A CN201910935412A CN110645328B CN 110645328 B CN110645328 B CN 110645328B CN 201910935412 A CN201910935412 A CN 201910935412A CN 110645328 B CN110645328 B CN 110645328B
- Authority
- CN
- China
- Prior art keywords
- transmission
- spherical surface
- chain
- reducing
- wheel
- 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.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/24—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using chains or toothed belts, belts in the form of links; Chains or belts specially adapted to such gearing
Abstract
The invention relates to the technical field of stepless speed change, in particular to a spherical structure stepless speed change device which comprises a chain and a transmission wheel set, wherein the transmission wheel set comprises a left wheel and a right wheel, a variable-diameter transmission groove is formed between the left wheel and the right wheel, a first spherical surface and a second spherical surface are respectively formed on two opposite side walls of the variable-diameter transmission groove, and the chain is arranged in the variable-diameter transmission groove and is abutted against the first spherical surface and the second spherical surface. According to the invention, by arranging the first spherical surface and the second spherical surface, when the left wheel and/or the right wheel are driven to move axially by hydraulic drive, the radial directions of the resultant force directions acting on the chain by the first spherical surface and the second spherical surface are the same, so that the diameter of the chain is changed, the chain is increased or decreased along the arc lines of the first spherical surface and the second spherical surface, the axial moving distance of the left wheel and/or the right wheel is short, the axial moving stroke is short, and the diameter changing efficiency is high.
Description
Technical Field
The invention relates to the technical field of stepless speed change, in particular to a stepless speed change device with a spherical structure.
Background
At present, stepless speed change is realized by a mode of forming V-shaped grooves and chain friction transmission by two groups of conical transmission wheels in the prior art, when a chain moves in contact with the conical surfaces of the conical transmission wheels, the axial force applied to the chain by the conical surfaces is large, so that the diameter-changing resistance of the chain is large, the energy consumption of hydraulic drive is large, in addition, the axial moving distance of the conical transmission wheels in the prior art is large when the diameter is changed, the consumption of the hydraulic drive is further increased, and the size of a stepless speed change structure is increased.
Disclosure of Invention
The invention aims to provide a spherical structure stepless speed change device which is beneficial to reducing the diameter change resistance, reducing the driving energy consumption, improving the diameter change efficiency and reducing the equipment volume.
In order to achieve the above purpose, the present invention provides a spherical structure stepless speed change device, which comprises a chain and a transmission wheel set, wherein the transmission wheel set comprises a left wheel and a right wheel, a variable diameter transmission groove is formed between the left wheel and the right wheel, two opposite side walls of the variable diameter transmission groove respectively form a first spherical surface and a second spherical surface, and the chain is arranged in the variable diameter transmission groove and is abutted against the first spherical surface and the second spherical surface so as to be used for friction transmission between the left wheel and the chain and between the right wheel and the chain.
Optionally, the reducing mechanism further comprises at least two groups of reducing transmission assemblies, wherein the reducing transmission assemblies are arranged in the reducing transmission grooves and meshed with the chains and move along the radial direction of the transmission wheel set.
Optionally, the first spherical surface and the second spherical surface are both provided with movable grooves, two ends of the variable diameter transmission assembly are respectively movably connected to the movable grooves of the first spherical surface and the second spherical surface, the variable diameter transmission assembly is provided with a third spherical surface, and the third spherical surface is embedded in the movable grooves and is on the same spherical surface with the first spherical surface or the second spherical surface.
Optionally, the reducing transmission assembly comprises a chain transmission gear and a reducing driving frame rotatably connected to two ends of the chain transmission gear, the chain transmission gear is meshed with the chain, the reducing driving frame is movably mounted in the movable groove, and one end face of the reducing driving frame is the third spherical surface.
Optionally, the chain transmission gear is provided with a reducing transmission part, the inner side wall of the movable groove is provided with a transmission rack which is used for being in transmission connection with the reducing transmission part, the reducing transmission part is meshed with the transmission rack, a reducing driving module is arranged on the reducing driving frame, and the reducing driving module is in transmission connection with the reducing transmission part.
Optionally, the reducing transmission part is sleeved with a self-aligning bearing, a reducing gear is sleeved on the outer side face of the self-aligning bearing, and the reducing gear is connected with the transmission rack and the reducing driving module respectively.
Optionally, the chain transmission gear is provided with a tooth position correcting portion, the reducing drive frame is provided with a correcting drive module, and the correcting drive module is in transmission connection with the tooth position correcting portion.
Optionally, a fourth spherical surface is respectively arranged on both sides of the chain, and the fourth spherical surface is abutted against the first spherical surface, the second spherical surface and the third spherical surface.
Optionally, the chain is formed by sequentially connecting a plurality of spheres and cylinders or tooth-shaped bodies, both ends of which are respectively provided with the fourth spherical surface, in series.
Optionally, the number of the reducing transmission assemblies is two, and the two reducing transmission assemblies are uniformly arranged along the circumferential direction of the transmission wheel set.
The embodiment of the invention has the following technical effects:
according to the invention, by arranging the first spherical surface and the second spherical surface, when the left side wheel and/or the right side wheel are driven to move axially by hydraulic pressure, the resultant force direction of the forces applied to the chain by the first spherical surface and the second spherical surface is the same as the radial direction of the transmission wheel set, so that the diameter of the chain is changed, and the circumference of the chain is enlarged or reduced along the arc lines of the first spherical surface and the second spherical surface; when the chain circumference diminishes, the hydraulic drive left side wheel and the motion of right side wheel back to back, the chain removes along the pitch arc of first sphere and second sphere under the pulling force effect, and the resistance is less, and reducing is efficient.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
fig. 2 is a partially enlarged schematic view at a in fig. 1.
Description of the reference numerals:
1. the variable-diameter driving device comprises a chain, 11, a sphere, 2, a driving wheel group, 21, a left wheel, 22, a right wheel, 23, a variable-diameter driving groove, 24, a first spherical surface, 25, a second spherical surface, 26, a movable groove, 3, a variable-diameter driving assembly, 31, a chain driving gear, 32, a variable-diameter driving frame, 321, a third spherical surface, 33, a variable-diameter driving module, 34, a self-aligning bearing, 35, a variable-diameter gear, 36, a tooth position correcting portion, 37 and a correcting driving module.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings only for the convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In addition, the terms "first", "second", and the like are used in the present invention to describe various information, but the information should not be limited to these terms, which are used only to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
Referring to fig. 1 and 2, the present embodiment provides a spherical stepless speed change device, including a chain 1 and a transmission pulley set 2, the transmission pulley set 2 includes a left side pulley 21 and a right side pulley 22, a reducing transmission groove 23 is formed between the left side pulley 21 and the right side pulley 22, two opposite side walls of the reducing transmission groove 23 form a first spherical surface 24 and a second spherical surface 25 respectively, and the chain 1 is disposed in the reducing transmission groove 23 and abutted against the first spherical surface 24 and the second spherical surface 25, so that the left side pulley 21 and the right side pulley 22 and the chain 1 transmit through friction. According to the invention, by arranging the first spherical surface 24 and the second spherical surface 25, when the left side wheel 21 and/or the right side wheel 22 are driven to axially move by hydraulic pressure, the radial directions of the resultant force directions of the first spherical surface 24 and the second spherical surface 25 acting on the chain 1 are the same, so that the diameter of the chain 1 is changed, and the circumference of the chain 1 is enlarged or reduced along the arcs of the first spherical surface 24 and the second spherical surface 25; when the circumference of the chain 1 is reduced, the power system drives the left side wheel 21 and the right side wheel 22 to move back to back, the chain 1 moves along the arcs of the first spherical surface 24 and the second spherical surface 25 under the action of tensile force, the resistance is small, and the diameter changing efficiency is high.
Still include at least two sets of reducing drive assembly 3, reducing drive assembly 3 sets up in reducing drive groove 23 and 1 meshing of chain and moves along the radial direction of transmission wheelset 2, drive reducing drive assembly 3 and rotate around the axis of transmission wheelset 2 when left side wheel 21 and right side wheel 22 rotate, through reducing drive assembly 3 and 1 meshing of chain and drive chain 1 and rotate, the problem that left side wheel 21 and right side wheel 22 and 1 friction drive of chain skidded has been avoided, drive 1 rotations of chain through reducing drive assembly 3 and the cooperation of transmission wheelset 2, the driven efficiency and the stability of 1 chain have further been improved, in this embodiment, the quantity of reducing drive assembly 3 is two sets of, two sets of reducing drive assembly 3 are along 2 circumferencial directions of transmission wheelset evenly arranged, thereby when making wheelset 2 rotate, reducing drive assembly 3 has at least one set to mesh with 1 chain and carry out the transmission, guarantee the job stabilization nature of 1 chain.
Wherein, movable groove 26 has all been seted up to first sphere 24 and second sphere 25, 3 both ends of reducing drive assembly swing joint respectively in the movable groove of first sphere 24 and second sphere 25, make reducing drive assembly 3 remove along movable groove 26, when left side wheel 21 and right side wheel 22 axial displacement made chain 1 reduce, reducing drive assembly 3 keeps with the meshing of chain 1, realize driven stability, in addition, reducing drive assembly 3 is equipped with third sphere 321, third sphere 321 inlays and locates movable groove 26 and with first sphere 24 or second sphere 25 on same sphere, compensate the opening that movable groove 26 formed through third sphere 321, avoid movable groove 26 the chain jamming phenomenon to appear.
Specifically, the reducing transmission assembly 3 comprises a chain transmission gear 31 and reducing driving frames 32 which are rotatably connected to two ends of the chain transmission gear 31, the chain transmission gear 31 is meshed with the chain 1, the reducing driving frames 32 are movably mounted in the movable groove 26, the chain transmission gear 31 moves along the movable groove 26, the moving reliability of the chain transmission gear 31 is improved, and one end face of the reducing driving frame 32 is abutted to the third spherical surface 321 and the chain 1. Wherein, the derailleur is practical preferred, and the diameter of chain drive gear 31 is 10mm-90mm, and in addition, the removal reducing scope of the reducing drive assembly 3 of at least two sets of is 20mm-180mm.
Further, the chain transmission gear 31 is provided with a reducing transmission part, the inner side wall of the movable groove 26 is provided with a transmission rack which is used for being in transmission connection with the reducing transmission part, the reducing transmission part is meshed with the transmission rack, the reducing driving frame 32 is provided with a reducing driving module 33, the reducing driving module 33 is in transmission connection with the reducing transmission part, the chain transmission gear 31 is driven by the reducing driving module 33 to move along the transmission rack, namely, the chain transmission gear moves along the axis direction of the left side wheel 21 and the right side wheel 22 along the spherical arc line of the first spherical surface 24 or the second spherical surface 25, the chain transmission gear moves to be meshed with the chain 1 all the time through the synchronization of the reducing driving module 33 and the driving of a power system, and when the left side wheel 21 and the right side wheel 22 move axially to push the chain 1 to reduce the diameter, the reducing driving module 33 drives the chain transmission gear 31 to move to be meshed with the chain 1 all the time.
Wherein, because the reducing gear frame removes along the sphere pitch arc when removing, and the drive rack arranges along sphere pitch arc, if reducing transmission portion need all the time with the drive rack with install the reducing drive module 33 meshing at the reducing gear frame, reducing transmission portion need follow the sphere pitch arc and deflect, refer to fig. 2, through being equipped with self-aligning bearing 34 at reducing transmission portion cover, and self-aligning bearing 34 lateral surface cover is equipped with reducing gear 35, reducing gear 35 is connected with drive rack and reducing drive module 33 respectively, drive self-aligning bearing 34 along the sphere pitch arc deflection when the reducing gear frame removes, thereby make reducing drive module 33 and drive rack and cover establish the reducing gear 35 that establishes at self-aligning bearing 34 lateral surface and keep meshing.
Further, the chain transmission gear 31 is provided with a tooth position correcting part 36, the reducing driving frame 32 is provided with a correcting driving module 37, the correcting driving module 37 is in transmission connection with the tooth position correcting part 36, when the chain 1 is reduced in diameter, the chain transmission gear 31 is driven to rotate by the correcting driving module 37 in the moving process of the chain transmission gear 31, so that the chain transmission gear 31 and the chain 1 are kept synchronous, and the transmission stability of the chain 1 is kept.
Specifically, the reducing drive module 33 and the correction drive module 37 in this embodiment are both servo motors connected to screw shafts, and are in meshing transmission with the reducing gear 35 and the tooth position correction portion 37 through the screw shafts.
In this embodiment, in order to further reduce the wear between the chain 1 and the transmission wheel set 2, the two sides of the chain 1 are respectively provided with a fourth spherical surface, the fourth spherical surfaces are abutted to the first spherical surface 24, the second spherical surface 25 and the third spherical surface 321, and further, the chain 1 is formed by sequentially connecting a plurality of spherical bodies 11, and cylinders or tooth-shaped bodies (such as a toothed belt or a toothed chain plate, etc.) which are respectively provided with the fourth spherical surfaces at the two sides in series.
The working principle of the invention is as follows:
the transmission wheel set 2 is connected with a power system, under the driving of a hydraulic unit, a left side wheel 21 and a right side wheel 22 of the transmission wheel set 2 move oppositely or oppositely along an axis, the chain 1 is arranged in a reducing transmission groove 23 and is abutted against a first spherical surface 24 and a second spherical surface 25, so that the left side wheel 21 and the right side wheel 22 push the chain 1 to change the circumference size in the moving process to realize stepless speed change, meanwhile, a reducing driving module 33 drives a chain transmission gear 31 to move synchronously along a movable groove 26 and keep being meshed with the chain 1 to drive the chain 1 to rotate, the chain 1 and the transmission wheel set 2 are prevented from skidding, in the reducing process of the chain 1, the chain transmission gear 31 and the chain 1 generate a gear difference, the gear difference is corrected through a gear position correcting part 36 and a correcting driving module 37, and the chain transmission gear 31 and the chain 1 keep stable transmission.
In addition, when the hydraulic unit is not used for driving, the variable diameter driving module 33 can synchronously drive the left side wheel 21 and the right side wheel 22 to relatively move along the chain transmission gear 31 when the driving chain transmission gear 31 moves along the spherical arc of the first spherical surface 24 or the second spherical surface 25 to the axial direction of the left side wheel 21 and the right side wheel 22.
In summary, by arranging the first spherical surface 24 and the second spherical surface 25, when the left side wheel 21 and/or the right side wheel 22 are driven to axially move by hydraulic pressure, the radial directions of the resultant force directions of the first spherical surface 24 and the second spherical surface 25 acting on the chain 1 are the same, so that the chain 1 is caused to realize diameter change, the arc lines of the chain 1 along the first spherical surface 24 and the second spherical surface 25 become larger or smaller, the axial moving distance of the left side wheel 21 and/or the right side wheel 22 is smaller, the axial moving stroke is shorter, the diameter changing efficiency is higher, when the circumference of the chain 1 becomes larger, the resistance of the left side wheel 21 and the right side wheel 22 to move towards each other by hydraulic pressure is smaller, and the energy consumption of hydraulic drive is reduced; when the circumference of the chain 1 is reduced, the left side wheel 21 and the right side wheel 22 are driven by hydraulic pressure to move back and forth, the chain 1 moves along the arc lines of the first spherical surface 24 and the second spherical surface 25 under the action of pulling force, the resistance is small, and the diameter changing efficiency is high.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (8)
1. A stepless speed change device with a spherical structure is characterized by comprising a chain and a transmission wheel group, wherein the transmission wheel group comprises a left wheel and a right wheel, a variable-diameter transmission groove is formed between the left wheel and the right wheel, two opposite side walls of the variable-diameter transmission groove respectively form a first spherical surface and a second spherical surface, and the chain is arranged in the variable-diameter transmission groove and is abutted against the first spherical surface and the second spherical surface so as to be used for friction transmission between the left wheel and the chain as well as between the right wheel and the chain;
the reducing transmission assembly is arranged in the reducing transmission groove, is meshed with the chain and moves along the radial direction of the transmission wheel set;
the variable diameter transmission assembly is provided with a third spherical surface which is embedded in the movable groove and is on the same spherical surface with the first spherical surface or the second spherical surface.
2. The stepless speed change device with the spherical structure according to claim 1, wherein the variable diameter transmission assembly comprises a chain transmission gear and variable diameter driving frames rotatably connected to two ends of the chain transmission gear, the chain transmission gear is engaged with the chain, the variable diameter driving frames are movably mounted in the movable groove, and one end face of each variable diameter driving frame is the third spherical surface.
3. The stepless speed change device with the spherical structure according to claim 2, wherein the chain transmission gear is provided with a reducing transmission part, the inner side wall of the movable groove is provided with a transmission rack for being in transmission connection with the reducing transmission part, the reducing transmission part is meshed with the transmission rack, the reducing driving frame is provided with a reducing driving module, and the reducing driving module is in transmission connection with the reducing transmission part.
4. The stepless speed change device with the spherical structure according to claim 3 is characterized in that the reducing transmission part is sleeved with a self-aligning bearing, a reducing gear is sleeved on the outer side surface of the self-aligning bearing, and the reducing gear is respectively connected with the transmission rack and the reducing driving module.
5. The stepless speed change device with the spherical structure as claimed in claim 2, wherein the chain transmission gear is provided with a tooth position correcting portion, the reducing drive rack is provided with a correcting drive module, and the correcting drive module is in transmission connection with the tooth position correcting portion.
6. The continuously variable transmission of a spherical structure according to claim 1, wherein a fourth spherical surface is provided on each of both sides of the chain, and the fourth spherical surface abuts against the first spherical surface, the second spherical surface, and the third spherical surface.
7. The stepless speed change device with a spherical structure as claimed in claim 6, wherein the chain is formed by connecting a plurality of spheres, cylinders or tooth-shaped bodies with the fourth spherical surface at both ends in series.
8. The stepless speed change device with the spherical structure according to claim 1, wherein the number of the reducing transmission assemblies is two, and the two reducing transmission assemblies are uniformly arranged along the circumferential direction of the transmission wheel set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910935412.7A CN110645328B (en) | 2019-09-29 | 2019-09-29 | Spherical surface structure stepless speed change device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910935412.7A CN110645328B (en) | 2019-09-29 | 2019-09-29 | Spherical surface structure stepless speed change device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110645328A CN110645328A (en) | 2020-01-03 |
| CN110645328B true CN110645328B (en) | 2022-11-29 |
Family
ID=68993322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910935412.7A Active CN110645328B (en) | 2019-09-29 | 2019-09-29 | Spherical surface structure stepless speed change device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110645328B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116427873B (en) * | 2023-05-04 | 2023-11-03 | 西南石油大学 | Oil gas production tubular column cutterbar |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1127165B (en) * | 1961-01-25 | 1962-04-05 | Reimers Getriebe K G | Infinitely variable transmission with traction train running between pairs of conical pulleys and hydraulic control |
| CN1288121A (en) * | 1999-09-09 | 2001-03-21 | 李维纲 | Chinese dragon type mechanical variable speed system |
| CN1693739A (en) * | 2004-05-08 | 2005-11-09 | 郑富森 | Automatic stepless speed change mechanism |
| CN103791050A (en) * | 2013-12-06 | 2014-05-14 | 莫韬 | Chained infinitely variable speed transmission gear |
| CN108006177B (en) * | 2017-12-05 | 2019-12-13 | 陈学琴 | Planetary gear tracking engagement continuously variable transmission |
| CN109139835B (en) * | 2018-08-20 | 2020-06-02 | 金剑 | Ball chain transmission mechanism |
-
2019
- 2019-09-29 CN CN201910935412.7A patent/CN110645328B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110645328A (en) | 2020-01-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100457526C (en) | Variable gear ratio steering apparatus for an automobile | |
| US20120238384A1 (en) | Locking continuously variable transmission (cvt) | |
| CN110645328B (en) | Spherical surface structure stepless speed change device | |
| CN105570410A (en) | Multi-line planetary traction and transmission type speed reducing bearing | |
| CN100351545C (en) | Back action mechanism of belt type stepless gear | |
| CN106763613B (en) | Novel joint speed reducer | |
| CN110234908B (en) | Thrust chain device | |
| CN100441915C (en) | Ball-wedge speed reducer | |
| KR20210018816A (en) | Fixed ratio ground or friction drive | |
| CN101033916A (en) | Large-scale chain grate stoker driving system | |
| CN203051669U (en) | Device driving movable shaft to flexibly reversely rotate or forward rotate | |
| CN203730678U (en) | Continuously-variable transmission driven by friction wheel | |
| CN1616847A (en) | Method for close contact of soft wheel and rigid wheel in harmonic driving and floating wave generator | |
| CN205366873U (en) | Sprocket synchronous motion overspeed device tensioner | |
| CN100478582C (en) | Driving apparatus of independent adjustable backlash changing thickness cycloidal gear | |
| CN203627699U (en) | Roller cone plate type stepless speed variator | |
| CN111396522A (en) | Steel ring type friction transmission stepless speed changer | |
| CN216134376U (en) | Flexible gear motor of gear box | |
| CN101349322B (en) | Small inclination drive gearbox | |
| CN104061292A (en) | Novel space transmission tooth-shaped chain system | |
| CN2634199Y (en) | Stepless variable speed harmonic driving device | |
| CN108557387B (en) | Power transmission device and power transmission method | |
| CN219345391U (en) | Multifunctional chain capable of lifting and pushing | |
| CN203906685U (en) | Novel space transmission tooth-shaped chain system | |
| CN110630710B (en) | Anti-skid continuously variable transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 601, No. 4, Yachengtang South Street, Tangxi Dawei, Baiyun District, Guangzhou City, Guangdong Province, 510000 Applicant after: Liang En Address before: 537509 No.34, Dongtou team, Tatan village, Yangcun Town, Rong County, Yulin City, Guangxi Zhuang Autonomous Region Applicant before: Liang En |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |