CN107191428A - A kind of interior outer piston self-locking cylinder - Google Patents
A kind of interior outer piston self-locking cylinder Download PDFInfo
- Publication number
- CN107191428A CN107191428A CN201710377107.1A CN201710377107A CN107191428A CN 107191428 A CN107191428 A CN 107191428A CN 201710377107 A CN201710377107 A CN 201710377107A CN 107191428 A CN107191428 A CN 107191428A
- Authority
- CN
- China
- Prior art keywords
- protecgulum
- piston
- piston rod
- brake
- cylinder
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B2015/268—Fluid supply for locking or release independent of actuator pressurisation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of interior outer piston self-locking cylinder, including cylinder body, cylinder body two ends have been respectively fixedly connected with protecgulum and bonnet, cylinder body includes inner cylinder liner and outer cylinder sheath, inner cylinder liner is provided with inner carrier and piston rod, piston rod stretches into inner cylinder liner from protecgulum, and piston rod is fixedly connected with inner carrier, protecgulum is provided with the venthole that inner cylinder liner is in communication with the outside, outer piston and hydraulic oil are provided with outer cylinder sheath, protecgulum is provided with the air admission hole connected with outer piston, cover afterwards provided with the connecting hole for connecting hydraulic oil with inner cylinder liner, protecgulum is provided with the accommodating cavity connected with venthole, accommodating cavity inside brake lock set, braking lock set includes brake bar, piston rod is provided with the caulking groove coordinated with brake bar, brake bar end is connected with brake piston, provided with spring so that brake bar closely offsets with caulking groove between brake piston and accommodating cavity.The present invention has simple in construction, can voluntarily be unlocked after piston rod lock, and piston rod is the characteristics of can operate steadily.
Description
Technical field
The present invention relates to cylinder technical field, more particularly to a kind of interior outer piston self-locking cylinder.
Background technology
Cylinder is usually to be made up of parts such as cylinder body, end cap, piston, piston rod and seals.Cylinder is that guiding piston exists
The cylindrical metal parts of straight reciprocating motion are wherein carried out, the pressure energy of compressed air is converted into mechanical energy, drive mechanism
Make straight reciprocating motion, swing and rotary motion.Current cylinder is widely used to printing, semiconductor, Automated condtrol, machine
The multiple fields such as people.
Motion due to cylinder during cylinder use fully relies on the gas-powered with certain pressure, therefore once
Leaked air in system or the problems such as pneumatic supply is damaged, the cylinder piston run out of steam in eminence will gravity effect
Fall, cause the injures and deaths for damaging even personnel of workpiece.In order to solve this problem, it can typically be set at the piston rod of cylinder
Safety pin is put, piston rod is locked, but piston rod needs operating personnel's manual unlocking after locking, causes using not
Just, and existing cylinder also there are problems that mostly it is complicated,.
The content of the invention
There is provided a kind of interior outer piston self-locking cylinder, simple in construction, piston rod lock with defect in view of the shortcomings of the prior art
After can voluntarily unlock, and piston rod can operate steadily.
To achieve the above object, the present invention provides following technical scheme.
A kind of interior outer piston self-locking cylinder, including cylinder body, cylinder body two ends have been respectively fixedly connected with protecgulum and bonnet, cylinder body bag
Inner cylinder liner and outer cylinder sheath are included, inner cylinder liner is provided with moveable inner carrier and piston rod, and piston rod stretches into inner cylinder liner from protecgulum, and living
One end that stopper rod stretches into inner cylinder liner is fixedly connected with inner carrier, and protecgulum is provided with the venthole that inner cylinder liner is in communication with the outside, outside
Outer piston and hydraulic oil are provided with cylinder sleeve, protecgulum is provided with air admission hole connect with outer piston, after cover provided with by hydraulic oil and
The connecting hole of inner cylinder liner connection, protecgulum is provided with the accommodating cavity connected with venthole, accommodating cavity inside brake lock set, braking lock group
Part includes brake bar, and piston rod is provided with the caulking groove coordinated with brake bar, and brake bar end is connected with brake piston, brake piston
Provided with spring so that brake bar closely offsets with caulking groove between accommodating cavity.
Further, handle is additionally provided with accommodating cavity, handle is stretched into accommodating cavity from protecgulum, and handle is consolidated with brake piston
Fixed connection, spring housing is outside handle.
Further, protecgulum is provided with the seal ring assembly coordinated with piston rod, seal ring assembly rectangular in cross-section, sealing
Coil assembly two ends are made up of hard material, are made up in the middle of seal ring assembly of soft material, and protecgulum front end is connected by adjusting screw
Flange is connected to, O-ring is provided between flange and seal ring assembly.
Further, the bushing coordinated with piston rod is additionally provided with protecgulum.
Further, inner carrier and outer piston are embedded with sealing ring and wear ring.
Further, between protecgulum and cylinder body, it is respectively equipped with O-ring between bonnet and cylinder body.
Beneficial effects of the present invention are：The invention provides a kind of interior outer piston self-locking cylinder, gas is through air inlet when using
Hole, which enters in outer cylinder sheath, promotes outer piston movement, and outer piston, which is moved, make it that hydraulic oil enters inner casing through interface channel in outer cylinder sheath
Set, hydraulic oil will promote inner carrier to move, and the gas of inner cylinder liner is discharged through venthole, and inner carrier drives piston rod movement to carry out
Work, promotes piston rod movement, it is ensured that cylinder can operate steadily, when piston rod is moved to certain distance by hydraulic oil,
Caulking groove will offset with brake bar and piston rod is locked, during reset, and gas enters inner cylinder liner through venthole, due to accommodating cavity
Connected with venthole, portion gas enters in accommodating cavity through venthole, now gas push brake piston is moved so that brake bar
Separated with caulking groove no longer to piston rod lock, the gas that inner cylinder liner enters will promote inner carrier to drive piston rod to reset.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
In figure, 1. inner cylinder liners；11. inner carrier；12. piston rod；13. wear ring；14. sealing ring；2. outer cylinder sheath；21. outside
Piston；22. hydraulic oil；3. protecgulum；31. venthole；32. air admission hole；33. accommodating cavity；331. brake bar；332. brake piston；
333. handle；334. spring；34. seal ring assembly；35. flange；36. bushing；37. adjusting screw；4. bonnet；41. connecting hole.
Embodiment
With reference to accompanying drawing to the further explaination of the present invention.
A kind of interior outer piston self-locking cylinder shown in Figure 1, including cylinder body, cylinder body two ends are solid by connecting screw rod respectively
Surely protecgulum 3 and bonnet 4 are connected with, O-ring is respectively equipped between protecgulum 3 and cylinder body, between bonnet 4 and cylinder body, to ensure cylinder
Sealing it is good, cylinder body includes inner cylinder liner 1 and outer cylinder sheath 2, and inner cylinder liner 1 is provided with moveable inner carrier 11 and piston rod 12,
Inner carrier 11 is embedded with sealing ring 14 and wear ring 13, and to ensure the sealing and wearability of inner carrier 11, piston rod 12 is in the past
Lid 3 stretches into inner cylinder liner 1, and piston rod 12 stretches into one end of inner cylinder liner 1 and is fixedly connected with inner carrier 11, and piston rod 12 is located at inner casing
One end outside set 1 is connected with the bushing 36 for being additionally provided with and coordinating with piston rod 12 in nut, protecgulum 3, it is ensured that piston rod 12 is difficult mill
Damage.
Protecgulum 3, which is provided with the venthole 31 that inner cylinder liner 1 is in communication with the outside, outer cylinder sheath 2, is provided with outer piston 21 and hydraulic pressure
Oil 22, protecgulum 3 is provided with the air admission hole 32 connected with outer piston 21, and bonnet 4 is provided with connect hydraulic oil 22 with inner cylinder liner 1
Connecting hole 41, for the ease of processing, connecting hole 41 is through type, and the place of being in communication with the outside of connecting hole 41 is provided with sealing plug, preceding
Lid 3 is provided with the accommodating cavity 33 connected with venthole 31, and the inside brake lock set of accommodating cavity 33, braking lock set includes brake bar
331, piston rod 12 is provided with the caulking groove coordinated with brake bar 331, and the end of brake bar 331 is connected with brake piston 332, and braking is lived
Spring 334 is provided between plug 332 and accommodating cavity 33, the one end of spring 334, which is supported, is located at the inwall of accommodating cavity 33, and the other end of spring 334 is supported
Located at brake piston 332, so that brake bar 331 closely offsets with caulking groove.
Gas enters in outer cylinder sheath 2 through air admission hole 32 when the present invention is used promotes outer piston 21 to move, and outer piston 21 is moved
So that hydraulic oil 22 enters inner cylinder liner 1 through interface channel in outer cylinder sheath 2, hydraulic oil 22 will promote inner carrier 11 to move, inner casing
The gas of set 1 is discharged through venthole 31, and inner carrier 11 drives the movement of piston rod 12 to be operated, and piston is promoted by hydraulic oil 22
Bar 12 is moved, it is ensured that cylinder can operate steadily, when piston rod 12 is moved to certain distance, and caulking groove will be with brake bar 331
Offset and piston rod 12 is locked, during reset, gas enters inner cylinder liner 1 through venthole 31, due to accommodating cavity 33 and venthole
31 connections, portion gas enters in accommodating cavity 33 through venthole 31, and now gas push brake piston 332 is moved so that braking
Bar 331 is separated with caulking groove no longer to be locked to piston rod 12, and the gas that inner cylinder liner 1 enters will promote inner carrier 11 to drive piston rod
12 are resetted so that cylinder can be unlocked voluntarily, easy to operate.Handle 333 is additionally provided with accommodating cavity 33, handle 333 is stretched from protecgulum 3
Enter in accommodating cavity 33, and handle 333 is fixedly connected with brake piston 332, spring 334 is sheathed on outside handle 333, manual when needing
During unblock, only handle 333 need to be pulled so that lever is separated no longer with caulking groove to the locking of piston rod 12.
Further, protecgulum 3 is provided with the seal ring assembly 34 coordinated with piston rod 12, and the section of seal ring assembly 34 is in square
Shape, the two ends of seal ring assembly 34 are made up of hard material, are made up in the middle of seal ring assembly 34 of soft material, and the front end of protecgulum 3 leads to
Overregulate screw 37 and be connected with flange 35, between flange 35 and seal ring assembly 34 be provided with O-ring, the one end of seal ring assembly 34 with
Protecgulum 3 closely offsets, and the other end of seal ring assembly 34 offsets with O-ring, because the motion frequency of piston rod 12 is higher, easily causes
Seal ring assembly 34 weares and teares, and causes the air-tightness of cylinder to reduce, when 34 serious wear of seal ring assembly, is adjusted by adjusting
The pretightning force of screw 37, makes flange 35 move and promote O-ring to be moved to seal ring assembly 34, due to the two ends of seal ring assembly 34
It is made up, is made up in the middle of seal ring assembly 34 of soft material of hard material, seal ring assembly 34 occurs in the presence of O-ring
To both sides deformation and it is thickening, and then cause seal ring assembly 34 fitted with piston rod 12 closely, it is ensured that the sealing of cylinder is good
It is good.
Described above is only the better embodiment of the present invention, therefore all constructions according to described in present patent application scope,
The equivalent change or modification that feature and principle are done, is included in the range of present patent application.
Claims (6)
1. a kind of interior outer piston self-locking cylinder, including cylinder body, cylinder body two ends have been respectively fixedly connected with protecgulum（3）And bonnet（4）, its
It is characterised by：Cylinder body includes inner cylinder liner（1）And outer cylinder sheath（2）, inner cylinder liner（1）Provided with moveable inner carrier（11）And piston rod
（12）, piston rod（12）From protecgulum（3）Stretch into inner cylinder liner（1）, and piston rod（12）Stretch into inner cylinder liner（1）One end and inner carrier
（11）It is fixedly connected, protecgulum（3）It is provided with inner cylinder liner（1）The venthole being in communication with the outside（31）, outer cylinder sheath（2）It is interior to be provided with outer
Piston（21）And hydraulic oil（22）, protecgulum（3）It is provided with and outer piston（21）The air admission hole of connection（32）, bonnet（4）It is provided with
By hydraulic oil（22）With inner cylinder liner（1）The connecting hole of connection（41）, protecgulum（3）It is provided with and venthole（31）The accommodating cavity of connection
（33）, accommodating cavity（33）Inside brake lock set, braking lock set includes brake bar（331）, piston rod（12）It is provided with and braking
Bar（331）The caulking groove of cooperation, brake bar（331）End is connected with brake piston（332）, brake piston（332）With accommodating cavity
（33）Between be provided with spring（334）So that brake bar（331）Closely offseted with caulking groove.
2. a kind of interior outer piston self-locking cylinder according to claim 1, it is characterised in that：Accommodating cavity（33）Inside it is additionally provided with hand
Handle（333）, handle（333）From protecgulum（3）Stretch into accommodating cavity（33）It is interior, and handle（333）With brake piston（332）It is fixed to connect
Connect, spring（334）It is sheathed on handle（333）Outside.
3. a kind of interior outer piston self-locking cylinder according to claim 1, it is characterised in that：Protecgulum（3）It is provided with and piston
Bar（12）The seal ring assembly of cooperation（34）, seal ring assembly（34）Rectangular in cross-section, seal ring assembly（34）Two ends are hard
Material is made, seal ring assembly（34）Centre is made up of soft material, protecgulum（3）Front end passes through adjusting screw（37）It is connected with method
It is blue（35）, flange（35）With seal ring assembly（34）Between be provided with O-ring.
4. a kind of interior outer piston self-locking cylinder according to claim 1, it is characterised in that：Protecgulum（3）Inside it is additionally provided with living
Stopper rod（12）The bushing of cooperation（36）.
5. a kind of interior outer piston self-locking cylinder according to claim 1, it is characterised in that：Inner carrier（11）And outer piston
（21）It is embedded with sealing ring（14）And wear ring（13）.
6. a kind of interior outer piston self-locking cylinder according to claim 1, it is characterised in that：Protecgulum（3）Between cylinder body, after
Lid（4）O-ring is respectively equipped between cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710377107.1A CN107191428B (en) | 2017-05-25 | 2017-05-25 | A kind of interior outer piston self-locking cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710377107.1A CN107191428B (en) | 2017-05-25 | 2017-05-25 | A kind of interior outer piston self-locking cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107191428A true CN107191428A (en) | 2017-09-22 |
| CN107191428B CN107191428B (en) | 2018-08-24 |
Family
ID=59875746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710377107.1A Active CN107191428B (en) | 2017-05-25 | 2017-05-25 | A kind of interior outer piston self-locking cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107191428B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730744A (en) * | 2018-06-14 | 2018-11-02 | 宁波威曼智能科技有限公司 | A kind of cylinder barrel inner wall oil dispersing device |
| CN108953282A (en) * | 2018-09-17 | 2018-12-07 | 谈振新 | Single sided entry double-acting cylinder |
| CN109049155A (en) * | 2018-09-25 | 2018-12-21 | 萧进雄 | Vapour-pressure type gang drill self-locking mechanism |
| CN109058229A (en) * | 2018-10-16 | 2018-12-21 | 山东百帝气动科技股份有限公司 | A kind of cylinder with double self-locking structures |
| WO2020124267A1 (en) * | 2018-12-21 | 2020-06-25 | 8082464 Canada Inc. | Hydraulic cylinder assembly, lifting apparatus and method for lifting a heavy machinery |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63180705A (en) * | 1987-01-23 | 1988-07-25 | Kimura Takashi | Pneumatic cylinder with stopping device |
| US20020014380A1 (en) * | 1999-03-08 | 2002-02-07 | Jolly Mark R. | Linear-acting controllable pneumatic motion control apparatus and control method therefor |
| CN2509362Y (en) * | 2001-10-12 | 2002-09-04 | 济南华能气动元器件公司 | Air cylinder with piston bar self-locking device |
| CN2553195Y (en) * | 2002-07-12 | 2003-05-28 | 烟台市渤塔气动液压工程有限公司 | Cylinder |
| WO2004067971A1 (en) * | 2003-01-29 | 2004-08-12 | Koganei Corporation | Hydraulic cylinder |
| EP2762258A1 (en) * | 2013-02-04 | 2014-08-06 | KGR S.p.A. | Fluid operated actuator, particularly for controlling the relative movement of the electrode holder arms of a resistance spot welding gun |
| CN206035937U (en) * | 2016-08-31 | 2017-03-22 | 奉化市鑫潮自动化元件有限公司 | Floating piston rod gas -liquid damping cylinder |
| CN206860581U (en) * | 2017-05-25 | 2018-01-09 | 宁波市鑫潮自动化元件有限公司 | A kind of interior outer piston self-locking cylinder |
-
2017
- 2017-05-25 CN CN201710377107.1A patent/CN107191428B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63180705A (en) * | 1987-01-23 | 1988-07-25 | Kimura Takashi | Pneumatic cylinder with stopping device |
| US20020014380A1 (en) * | 1999-03-08 | 2002-02-07 | Jolly Mark R. | Linear-acting controllable pneumatic motion control apparatus and control method therefor |
| CN2509362Y (en) * | 2001-10-12 | 2002-09-04 | 济南华能气动元器件公司 | Air cylinder with piston bar self-locking device |
| CN2553195Y (en) * | 2002-07-12 | 2003-05-28 | 烟台市渤塔气动液压工程有限公司 | Cylinder |
| WO2004067971A1 (en) * | 2003-01-29 | 2004-08-12 | Koganei Corporation | Hydraulic cylinder |
| EP2762258A1 (en) * | 2013-02-04 | 2014-08-06 | KGR S.p.A. | Fluid operated actuator, particularly for controlling the relative movement of the electrode holder arms of a resistance spot welding gun |
| CN206035937U (en) * | 2016-08-31 | 2017-03-22 | 奉化市鑫潮自动化元件有限公司 | Floating piston rod gas -liquid damping cylinder |
| CN206860581U (en) * | 2017-05-25 | 2018-01-09 | 宁波市鑫潮自动化元件有限公司 | A kind of interior outer piston self-locking cylinder |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730744A (en) * | 2018-06-14 | 2018-11-02 | 宁波威曼智能科技有限公司 | A kind of cylinder barrel inner wall oil dispersing device |
| CN108953282A (en) * | 2018-09-17 | 2018-12-07 | 谈振新 | Single sided entry double-acting cylinder |
| CN109049155A (en) * | 2018-09-25 | 2018-12-21 | 萧进雄 | Vapour-pressure type gang drill self-locking mechanism |
| CN109058229A (en) * | 2018-10-16 | 2018-12-21 | 山东百帝气动科技股份有限公司 | A kind of cylinder with double self-locking structures |
| WO2020124267A1 (en) * | 2018-12-21 | 2020-06-25 | 8082464 Canada Inc. | Hydraulic cylinder assembly, lifting apparatus and method for lifting a heavy machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107191428B (en) | 2018-08-24 |
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Address after: 315500 Tai Ao Industrial Park, Xikou Town, Fenghua District, Ningbo, Zhejiang, China Applicant after: Ningbo Xinchao automation component Co., Ltd. Address before: 315500 No. 8, Tian Hu Road, Tai Ao industrial area, Xikou Town, Fenghua District, Ningbo, Zhejiang Applicant before: Fenghua Xinchao Automatization Component Co., Ltd. |
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