CN103697131B - A kind of ball screw - Google Patents
A kind of ball screw Download PDFInfo
- Publication number
- CN103697131B CN103697131B CN201410002923.0A CN201410002923A CN103697131B CN 103697131 B CN103697131 B CN 103697131B CN 201410002923 A CN201410002923 A CN 201410002923A CN 103697131 B CN103697131 B CN 103697131B
- Authority
- CN
- China
- Prior art keywords
- bearing
- ball
- thrust
- female groove
- screw mandrel
- 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
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
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
-
- 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
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0497—Screw mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention provides a kind of ball screw, comprise the female groove cover of open type and screw mandrel assembly, described screw mandrel assembly is arranged in the female groove cover of open type, and the female groove cover of described open type is the internal thread sleeve pipe that a sidewall is provided with notch; Described screw mandrel assembly comprises coupling shaft, ball assembly, loading axle sleeve, gear, clutch shaft bearing seat, the second bearing support, the first thrust-bearing, the second thrust-bearing and the 3rd thrust-bearing, and described ball assembly, loading axle sleeve, gear, clutch shaft bearing seat, the second bearing support, the first thrust-bearing, the second thrust-bearing and the 3rd thrust-bearing are arranged on coupling shaft.The rotation of screw mandrel assembly of the present invention, open type female groove cover is fixing, the walking in the female groove cover of open type of screw mandrel assembly, and open type female groove cover middle part can be provided with multiple fulcrum, and strut stability is good; The present invention is provided with lubricating fitting, the wearing and tearing of the ball decreased, and the temperature rise of screw mandrel assembly and open type female groove cover is little, makes running accuracy of the present invention high, long service life.
Description
Technical field
The present invention relates to a kind of ball screw.
Background technique
Along with the fast development of industry, the application area of ball screw is more and more wider, the screw mandrel that general CAME is common and ball screw are all adopt screw spiral, nut walking loading, such structure, except the two ends of screw rod, on screw rod, intermediate portion can not arrange the strong point, and when the strong point, screw rod is slightly long, screw rod will be easy to bend, swing, and strut stability is poor.And traditional CAME screw mandrel and ball screw all do not install self lubricating system, like this, just can not well lubricate between nut and screw mandrel, the ball of screw mandrel will be made easy to wear, the temperature of screw mandrel raises and causes screw mandrel poor rigidity, strut stability is poorer, has a strong impact on running accuracy, and affects the working life of ball screw.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides that a kind of structure is simple, the not limit for length's degree of walking, can selflubricating and the good ball screw of strut stability.
The technical solution used in the present invention is: comprise the female groove cover of open type and screw mandrel assembly, and described screw mandrel assembly is arranged in the female groove cover of open type, and the female groove cover of described open type is the internal thread sleeve pipe that a sidewall is provided with notch, described screw mandrel assembly comprises coupling shaft, ball assembly, loading axle sleeve, gear, clutch shaft bearing seat, second bearing support, first thrust-bearing, second thrust-bearing and the 3rd thrust-bearing, described ball assembly, loading axle sleeve, gear, clutch shaft bearing seat, second bearing support, first thrust-bearing, second thrust-bearing and the 3rd thrust-bearing are arranged on coupling shaft, described loading axle sleeve is placed between ball assembly and gear, first thrust-bearing, clutch shaft bearing seat and the second thrust-bearing are placed between ball assembly and loading axle sleeve, clutch shaft bearing seat is positioned between the first thrust-bearing and the second thrust-bearing, 3rd thrust-bearing and the second bearing support are placed between loading axle sleeve and gear, 3rd thrust-bearing is near loading axle sleeve, described ball assembly comprises ball inner sleeve, two ball stop ring covers, ball and snap ring, and described ball sidewall of the inside race is provided with ball grooves, and the position of ball grooves is corresponding with the thread groove that the female groove of open type overlaps, described ball is arranged in ball grooves, two described ball stop ring covers are in semi-circular, the two ends of ball stop ring cover are provided with annular groove, the sidewall of ball stop ring cover corresponds to the ball grooves put in ball and is provided with clamping, two ball stop ring covers are sleeved on outside ball inner sleeve, and snap ring is embedded in the annular groove at two ball stop ring cover two ends.
In above-mentioned ball screw, also comprise safe screw mandrel, the 3rd bearing support and the 4th thrust-bearing, the diameter of described safe screw mandrel is less than the diameter of ball assembly; Safe screw mandrel is placed on coupling shaft, is positioned at ball assembly loading axle sleeve side dorsad, and the 3rd bearing support and the 4th bearing are between security thread bar and ball bearing.
In above-mentioned ball screw, also comprise safe screw mandrel, the 3rd bearing support and the 4th thrust-bearing, described safe screw mandrel is between ball assembly and loading axle sleeve, 3rd bearing support and the 4th bearing are between security thread bar and ball bearing, first thrust-bearing, clutch shaft bearing seat and the second thrust-bearing are placed between safe screw mandrel and loading axle sleeve, and clutch shaft bearing seat is positioned between the first thrust-bearing and the second thrust-bearing.
In above-mentioned ball screw, the female groove cover of described open type comprises female groove inner sleeve, female groove overcoat and key, and female groove inner sleeve is inlaid in female groove overcoat, is connected with female groove overcoat by key, and described female groove overcoat back is provided with link.
In above-mentioned ball screw, also comprise and connect oil drum and Lubricating oil barrel, described Lubricating oil barrel is arranged on the gear end of coupling shaft, connects the other end that oil drum is arranged on coupling shaft.
Compared with prior art, technique effect of the present invention is: the rotation of screw mandrel assembly of the present invention, and open type female groove cover is fixing, and make the walking in the female groove cover of open type of screw mandrel assembly, and open type female groove cover middle part can be provided with multiple fulcrum, strut stability is good; And the present invention is also provided with lubricating fitting, can to screw mandrel assembly and open type female groove cover lubrication, decrease the female groove of screw mandrel assembly and open type overlap between friction, the wearing and tearing of the ball that cause this reduces, the temperature rise of screw mandrel assembly and open type female groove cover is little, make running accuracy of the present invention high, long service life.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is screw mandrel assembly structure schematic diagram of the present invention.
Fig. 3 is the plan view of ball assembly of the present invention.
Fig. 4 is the left view of ball assembly of the present invention.
Fig. 5 is ball inner sleeve structural representation of the present invention.
Fig. 6 is female groove jacket structure schematic diagram of the present invention.
Fig. 7 is female groove jacket structure schematic diagram of splicing structure.
Fig. 8 is the structural representation of the present invention when using.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, the present invention includes the female groove cover 1 of open type and screw mandrel assembly 2, described screw mandrel assembly 2 is arranged in the female groove cover 1 of open type, and the female groove cover 1 of described open type is the internal thread sleeve pipe that a sidewall is provided with notch 101.As shown in Figure 2, described screw mandrel assembly 2 comprises coupling shaft 201, safe screw mandrel 202, ball assembly 203, loading axle sleeve 204, gear 205, clutch shaft bearing seat 206, second bearing support 209, 3rd bearing support 211, first thrust-bearing 207, second thrust-bearing 208, 3rd thrust-bearing 210 and the 4th thrust-bearing 212, described safe screw mandrel 202, ball assembly 203, loading axle sleeve 204, gear 205, clutch shaft bearing seat 206, second bearing support 209, 3rd bearing support 211, first thrust-bearing 207, second thrust-bearing 208, 3rd thrust-bearing 210 and the 4th thrust-bearing 212 are arranged on coupling shaft 201, described loading axle sleeve 204 is placed between ball assembly 203 and gear 205, safe screw mandrel 202 is positioned at ball assembly 203 loading axle sleeve 204 side dorsad, described loading axle sleeve 204 also can be placed between safe screw mandrel 202 and gear 205, and ball assembly 203 is placed in safe screw mandrel 202 loading axle sleeve 204 side dorsad.First thrust-bearing 207, clutch shaft bearing seat 206 and the second thrust-bearing 208 are placed between ball assembly 203 and loading axle sleeve 204 or between safe screw mandrel 202 and loading axle sleeve 204, clutch shaft bearing seat 206 is between the first thrust-bearing 207 and the second thrust-bearing 208,3rd thrust-bearing 210 and the second bearing support 209 are placed between loading axle sleeve 204 and gear 205, and the 3rd thrust-bearing 210 is near loading axle sleeve 204.The diameter of described safe screw mandrel 202 is less than the diameter of ball assembly 203, when screw mandrel assembly 2 is walked, and ball 2033 landing of ball assembly 203 or when wearing and tearing excessive, safe screw mandrel 202 plays auto-lock function, ensures the safety of contained object.
As shown in Figure 3,4, described ball assembly 203 comprises ball inner sleeve 2031, two ball stop ring cover 2032, ball 2033 and snap ring 2034, as shown in Figure 5, described ball inner sleeve 2031 sidewall is provided with ball grooves 20311, and the position of ball grooves 20311 is corresponding with the thread groove that the female groove of open type overlaps 1; Described ball 2033 is arranged in ball grooves 20311, two described ball stop ring covers 2032 are in semi-circular, the two ends of ball stop ring cover 2032 are provided with annular groove 20321, on the sidewall of ball stop ring cover 2032, the ball grooves 20311 corresponded in ball inner sleeve 2031 is provided with clamping 20322, two ball stop ring covers 2032 are sleeved on outside ball inner sleeve 2031, and snap ring 2034 is embedded in two ball stop rings and overlaps in the annular groove 20321 at 2032 two ends.
As shown in Figure 6, the female groove cover 1 of described open type comprises female groove inner sleeve 12, female groove overcoat 13 and key 14, and female groove inner sleeve 12 is inlaid in female groove overcoat 13, is connected with female groove overcoat 13 by key 14, and described female groove overcoat 13 back is provided with link 131.The opening plane of female groove overcoat 13 is provided with tapped hole 132, as shown in Figure 7, tapped hole 132 can be used for connecting female groove overcoat 13 and female groove overcoat link 133, the two ends of female groove overcoat link 133 are provided with bolt sleeve 134, after two female groove overcoats 13 dock, the bolt sleeve 134 of the female groove overcoat link 133 on two female groove overcoats 13 docks, and is linked together by two female groove overcoats 13 by bolt, increases the length of the female groove cover 1 of open type.
The two ends of the coupling shaft 21 of screw mandrel assembly 2 of the present invention are respectively equipped with and connect oil drum 214 and Lubricating oil barrel 213, and described Lubricating oil barrel 213 is arranged on the gear end of coupling shaft 21, connects the other end that oil drum 214 is arranged on coupling shaft.This lubricating structure is only limitted to the ball screw of vertical direction walking, if the ball screw of laterally walking, the shape and the mounting type that connect oil drum 214 and Lubricating oil barrel 213 can make corresponding change, and this belongs to prior art, is no longer repeated at this.
As shown in Figure 8, when the present invention uses, loading Sliding partitions 3 is connected with loading axle sleeve 204 of the present invention, the upper end of loading Sliding partitions 3 is provided with fuel tank 4, the bottom of fuel tank 4 is communicated with Lubricating oil barrel 213 of the present invention by a pipeline, the oil drum 214 that connects of the present invention is connected by the top of a pipeline with fuel tank 4, connects the pipeline that oil drum 214 is connected with fuel tank 4 and is provided with oil pump 41.Described loading Sliding partitions 3 is also provided with driving gear 31 and driven gear 32, driving gear 31 engages with driven gear 32, driving gear 31 is connected with motor 5, driven gear 32 engages with gear 205 of the present invention, when loading Sliding partitions 3 is walked, motor 5 drives driving gear 31 to rotate, rotation is passed to gear 205 of the present invention by driven gear 32, gear 205 of the present invention drives screw mandrel assembly 2 to rotate, because the female groove cover 1 of open type is fixing, so, screw mandrel assembly 2 straight line motion, the loading axle sleeve 204 of screw mandrel assembly 2 drives loading Sliding partitions 3 straight line moving, thus drive the object 6 on loading Sliding partitions 3 to walk.In order to prevent female groove inner sleeve 12 from skidding off from the axis of female groove overcoat 13, the two ends up and down of female groove overcoat 13 are respectively equipped with sealing cover 7 and lower sealing lid 8.
Claims (5)
1. a ball screw, is characterized in that: comprise the female groove cover of open type and screw mandrel assembly, and described screw mandrel assembly is arranged in the female groove cover of open type, and the female groove cover of described open type is the internal thread sleeve pipe that a sidewall is provided with notch, described screw mandrel assembly comprises coupling shaft, ball assembly, loading axle sleeve, gear, clutch shaft bearing seat, second bearing support, first thrust-bearing, second thrust-bearing and the 3rd thrust-bearing, described ball assembly, loading axle sleeve, gear, clutch shaft bearing seat, second bearing support, first thrust-bearing, second thrust-bearing and the 3rd thrust-bearing are arranged on coupling shaft, described loading axle sleeve is placed between ball assembly and gear, first thrust-bearing, clutch shaft bearing seat and the second thrust-bearing are placed between ball assembly and loading axle sleeve, clutch shaft bearing seat is positioned between the first thrust-bearing and the second thrust-bearing, 3rd thrust-bearing and the second bearing support are placed between loading axle sleeve and gear, 3rd thrust-bearing is near loading axle sleeve, described ball assembly comprises ball inner sleeve, two ball stop ring covers, ball and snap ring, and described ball sidewall of the inside race is provided with ball grooves, and the position of ball grooves is corresponding with the thread groove that the female groove of open type overlaps, described ball is arranged in ball grooves, two described ball stop ring covers are in semi-circular, the two ends of ball stop ring cover are provided with annular groove, the sidewall of ball stop ring cover corresponds to the ball grooves put in ball and is provided with clamping, two ball stop ring covers are sleeved on outside ball inner sleeve, and snap ring is embedded in the annular groove at two ball stop ring cover two ends.
2. ball screw according to claim 1, is characterized in that: also comprise safe screw mandrel, the 3rd bearing support and the 4th thrust-bearing, and the diameter of described safe screw mandrel is less than the diameter of ball assembly; Safe screw mandrel is placed on coupling shaft, is positioned at ball assembly loading axle sleeve side dorsad, and the 3rd bearing support and the 4th bearing are between security thread bar and ball bearing.
3. ball screw according to claim 1, it is characterized in that: also comprise safe screw mandrel, the 3rd bearing support and the 4th thrust-bearing, described safe screw mandrel is between ball assembly and loading axle sleeve, 3rd bearing support and the 4th bearing are between security thread bar and ball bearing, first thrust-bearing, clutch shaft bearing seat and the second thrust-bearing are placed between safe screw mandrel and loading axle sleeve, and clutch shaft bearing seat is positioned between the first thrust-bearing and the second thrust-bearing.
4. the ball screw according to claim 1,2 or 3, it is characterized in that: the female groove cover of described open type comprises female groove inner sleeve, female groove overcoat and key, female groove inner sleeve is inlaid in female groove overcoat, and be connected with female groove overcoat by key, described female groove overcoat back is provided with link.
5. ball screw according to claim 4, is characterized in that: also comprise and connect oil drum and Lubricating oil barrel, and described Lubricating oil barrel is arranged on the gear end of coupling shaft, connects the other end that oil drum is arranged on coupling shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410002923.0A CN103697131B (en) | 2014-01-03 | 2014-01-03 | A kind of ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410002923.0A CN103697131B (en) | 2014-01-03 | 2014-01-03 | A kind of ball screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103697131A CN103697131A (en) | 2014-04-02 |
| CN103697131B true CN103697131B (en) | 2016-03-02 |
Family
ID=50358763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410002923.0A Active CN103697131B (en) | 2014-01-03 | 2014-01-03 | A kind of ball screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103697131B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412994B (en) * | 2018-03-12 | 2020-09-29 | 嵊州市旭辉建材有限公司 | Linear feeding mechanism for quantitative rotation |
| CN111863654B (en) * | 2019-04-26 | 2023-07-25 | 昆山基侑电子科技有限公司 | Wafer soaking tank |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2819021A1 (en) * | 1978-03-30 | 1979-11-08 | Ass Eng Ltd | ACTUATING DEVICE IN THE FORM OF A SPINDLE-NUT ARRANGEMENT |
| GB2166835B (en) * | 1984-11-14 | 1988-08-03 | British Aerospace | Movement converting device |
| US4945781A (en) * | 1988-07-19 | 1990-08-07 | Hugo Isert | Ball screw mechanism |
| JPH10169747A (en) * | 1996-12-06 | 1998-06-26 | Tsubakimoto Chain Co | Ball screw shaft locking type linearly working machine |
| CN101517270A (en) * | 2006-09-29 | 2009-08-26 | Thk株式会社 | Rolling body screw device |
| WO2010043484A1 (en) * | 2008-10-14 | 2010-04-22 | Continental Automotive Gmbh | Spindle drive having anti-turn mechanism |
| CN201696571U (en) * | 2010-05-31 | 2011-01-05 | 贵州华烽电器有限公司 | Ball-screw pair |
| CN203796883U (en) * | 2014-01-03 | 2014-08-27 | 李国锋 | Ball screw |
-
2014
- 2014-01-03 CN CN201410002923.0A patent/CN103697131B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2819021A1 (en) * | 1978-03-30 | 1979-11-08 | Ass Eng Ltd | ACTUATING DEVICE IN THE FORM OF A SPINDLE-NUT ARRANGEMENT |
| GB2166835B (en) * | 1984-11-14 | 1988-08-03 | British Aerospace | Movement converting device |
| US4945781A (en) * | 1988-07-19 | 1990-08-07 | Hugo Isert | Ball screw mechanism |
| JPH10169747A (en) * | 1996-12-06 | 1998-06-26 | Tsubakimoto Chain Co | Ball screw shaft locking type linearly working machine |
| CN101517270A (en) * | 2006-09-29 | 2009-08-26 | Thk株式会社 | Rolling body screw device |
| WO2010043484A1 (en) * | 2008-10-14 | 2010-04-22 | Continental Automotive Gmbh | Spindle drive having anti-turn mechanism |
| CN201696571U (en) * | 2010-05-31 | 2011-01-05 | 贵州华烽电器有限公司 | Ball-screw pair |
| CN203796883U (en) * | 2014-01-03 | 2014-08-27 | 李国锋 | Ball screw |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103697131A (en) | 2014-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203888874U (en) | Lubrication system for front axle steering | |
| CN103697131B (en) | A kind of ball screw | |
| CN203796883U (en) | Ball screw | |
| CN102748431B (en) | A kind of speed reducer and be provided with the development machine of this speed reducer | |
| CN204164159U (en) | A kind of engine cam thrust device | |
| CN204755872U (en) | Hoist drive arrangement bearing automatic lubrication installation | |
| CN206000890U (en) | Cross axle universal joint | |
| CN108457605B (en) | Built-in passive full-automatic anti-eccentric wear oil pipe rotator | |
| CN203836207U (en) | Mechanical sealing device for stepped shaft | |
| CN106438736A (en) | Automobile constant-velocity joint with convenient grease replacement function | |
| CN203627794U (en) | Padding plane sealing device | |
| CN102418735A (en) | Self-lubricated ball pull rod mechanism | |
| CN201786960U (en) | Transmission shaft | |
| CN205745227U (en) | Automobile transmission lubrication system | |
| CN105217237B (en) | Drag conveyor | |
| CN205895944U (en) | Quick lubricated cross axle | |
| CN204372501U (en) | Material taking machine claw steering base lubricating fitting | |
| CN205858988U (en) | Hooks coupling universal coupling cross bag | |
| CN204008133U (en) | The test unit of final drive shaft and the interlock of auxiliary transmission shaft | |
| CN217713353U (en) | Wear-resisting bearing bush for automobile engine | |
| CN203239765U (en) | Special copper sleeve for crusher | |
| CN202348137U (en) | Eccentric wear resistant sucker rod collar | |
| CN202732700U (en) | Reinforced abrasion-resistant bearing bush | |
| CN202545618U (en) | Big swing angle constant-velocity drive axle assembly | |
| CN221299808U (en) | Roller assembly structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211224 Address after: 410100 room 1205, shuntiancheng building, No. 59, Section 2, Furong Middle Road, Furong district, Changsha City, Hunan Province Patentee after: Hunan Leifeng Memorial Culture Communication Co.,Ltd. Address before: 411101 Room 601, unit 3, building 5, Jingui Mingcheng, No. 8, Hedong Avenue, Xiangtan City, Hunan Province Patentee before: Li Guofeng |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221110 Address after: Building 14, Hexibu City, Jiangongshan Community, Wangchengpo Street, Yuelu District, Changsha City, Hunan Province 410000 Patentee after: Hunan Zhongmu Assembly Technology Co.,Ltd. Address before: 410100 room 1205, shuntiancheng building, No. 59, Section 2, Furong Middle Road, Furong district, Changsha City, Hunan Province Patentee before: Hunan Leifeng Memorial Culture Communication Co.,Ltd. |