CN106762959A - Flow direction conversion equipment - Google Patents
Flow direction conversion equipment Download PDFInfo
- Publication number
- CN106762959A CN106762959A CN201710076622.6A CN201710076622A CN106762959A CN 106762959 A CN106762959 A CN 106762959A CN 201710076622 A CN201710076622 A CN 201710076622A CN 106762959 A CN106762959 A CN 106762959A
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- CN
- China
- Prior art keywords
- fluid
- conversion
- connecting hole
- hole
- connecting tube
- 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
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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
- F15B15/1423—Component parts; Constructional details
-
- 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
Abstract
The present invention provides a kind of flow direction conversion equipment, and the device includes body and conversion control.Body includes conversion cradle, has fluid inlet hole, Fluid-exiting apertures, the first connecting hole and the second connecting hole on conversion cradle, and the first connecting hole and the second connecting hole are connected with outer closures device.Conversion control is connected with conversion cradle, has the first connecting tube, the second connecting tube and the 3rd connecting tube on conversion control.Cause that conversion control is operated on different stations by changing three link positions of connecting tube, on the second station, fluid is flowed into through the second connecting hole, the fluid circulation of first direction is realized in the outflow of the first connecting hole；And in 3rd station, fluid is flowed into through the first connecting hole, the fluid circulation of second direction is realized in the outflow of the second connecting hole.
Description
Technical field
The present invention relates to hydraulic machinery field, and more particularly to a kind of flow direction conversion equipment.
Background technology
Fluid conversion equipment is a kind of part that can change flow direction.To realize the reciprocating motion of piston in hydraulic cylinder,
Generally need to be set in hydraulic cylinder that the fluid conversion equipment in oil circuit direction can be changed.The structure of existing hydraulic cylinder generally has two
Kind, Yi Zhongshi：Oil circuit can only drive piston forward into that can only be circulated in one direction after hydraulic cylinder in hydraulic cylinder
Motion, the retrogressing of piston could realize after then needing manual draining, and user uses very inconvenient, and operating efficiency is very low.
Another method is：To realize that the automatic of piston is return, oil circuit conversion can be configured in hydraulic cylinder on the market at present
Valve, so as to turn into bidirectional hydraulic.However, in the hydraulic cylinder of this structure, the distribution of the complex structure and oil circuit of oil circuit switching valve
Also very complicated, this sealing not only between high cost and oil circuit also has larger hidden danger.
The content of the invention
The present invention is in order to overcome the deficiencies in the prior art, there is provided a kind of fluid side of the fluid circulation of achievable both direction
To conversion equipment.
To achieve these goals, the present invention provides a kind of flow direction conversion equipment, and the device includes body and conversion
Control.Body includes conversion cradle, has fluid inlet hole, Fluid-exiting apertures, the first connecting hole and the second connecting hole on conversion cradle,
First connecting hole and the second connecting hole are connected with outer closures device.Conversion control is connected with conversion cradle, changes control
It is upper that there is the first connecting tube, the second connecting tube and the 3rd connecting tube.
On the first station, the two ends of the second connecting tube are connected with fluid inlet hole and Fluid-exiting apertures, and fluid connects through second
Adapter is circulated between fluid inlet hole and Fluid-exiting apertures, and fluid is introduced into outer closures device；
On the second station, the two ends of the first connecting tube are connected with the first connecting hole and Fluid-exiting apertures respectively, and the 3rd connects
The two ends of adapter are connected with the second connecting hole and fluid inlet hole respectively, and fluid flows into outer through the 3rd connecting tube from the second connecting hole
The first cavity in portion's closure means, the fluid in the second cavity of outer closures device is through the first connecting hole, the first connecting tube
From Fluid-exiting apertures outflow, first fluid circulation in direction is formed；
In 3rd station, the two ends of the first connecting tube are connected with the first connecting hole and fluid inlet hole respectively, and the 3rd connects
The two ends of adapter are connected with the second connecting hole and Fluid-exiting apertures respectively, and fluid flows into outer through the first connecting tube from the first connecting hole
The second cavity in portion's closure means, the fluid in the first cavity of outer closures device is through the second connecting hole, the 3rd connecting tube
From Fluid-exiting apertures outflow, second fluid circulation in direction is formed.
In one embodiment of the invention, fluid inlet hole and Fluid-exiting apertures are oppositely arranged, the first connecting hole and the second connecting hole
It is oppositely arranged, line and the first connecting hole center and the second connecting hole center between fluid inlet hole center and Fluid-exiting apertures center
Between line it is perpendicular.
In one embodiment of the invention, the first connecting tube, the second connecting tube and the 3rd connecting tube are arranged in arc-shaped and turn
Change on control.
In one embodiment of the invention, conversion control is rotated with conversion cradle and is connected, and is caused by rotating conversion control
Flow direction conversion equipment switches between the first station, the second station and 3rd station.
There is the spacing of limitation conversion control rotational angle in one embodiment of the invention, on conversion control and conversion cradle
Portion, limiting section includes three arc grooves being arranged on conversion cradle and is arranged on recessed with three arcs on conversion control
The lug boss that groove is engaged, three arc grooves are correspondingly arranged with fluid inlet hole, the first connecting hole and the second connecting hole respectively.
In one embodiment of the invention, conversion cradle and body detachable connection.
In one embodiment of the invention, one end of body has the connecting portion being connected with outer eccentric drive component, even
There are multiple circumferentially disposed piston components along eccentric shaft in socket part, there are multiple connection conversion cradles on each piston component
Through hole.
In one embodiment of the invention, each piston component includes spring base, spring, piston and oil switch living.Spring
It is fixed on spring base.Piston is connected with spring, the through hole on piston with multiple connection conversion cradles.Oil switch sleeve living is located at
Spring and positioned at piston near the side of spring base.
In one embodiment of the invention, flow direction conversion equipment also include be arranged on it is intrinsic and with fluid inlet hole and
At least one fluid storage tank that Fluid-exiting apertures are connected.
In sum, the flow direction conversion equipment that the present invention is provided is gone out by setting fluid inlet hole, fluid on body
Hole, the first connecting hole and the second connecting hole are simultaneously set and fluid inlet hole, Fluid-exiting apertures, the first connecting hole and the on conversion control
Three connecting tubes that two connecting holes are connected.Cause that conversion control is operated in not by changing three link positions of connecting tube
On same station, on the second station, fluid is flowed into through the second connecting hole, the outflow of the first connecting hole, realizes the stream of first direction
Body circulation；And in 3rd station, fluid is flowed into through the first connecting hole, the fluid of second direction is realized in the outflow of the second connecting hole
Circulation.
Additionally, being additionally provided with the connecting portion being connected with outer eccentric drive device on body, therefore can directly be installed at
Realize that the automatic of piston in hydraulic cylinder moves forward and backward on traditional hydraulic pump.It is not only greatly convenient for users to use, while
Also significantly reduce cost.
It is that above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly,
And coordinate accompanying drawing, it is described in detail below.
Brief description of the drawings
Fig. 1 a show the structural representation of body in the fluid conversion equipment of present invention offer.
Fig. 1 b show the structural representation at another visual angle of body in fluid conversion equipment in Fig. 1 a.
Fig. 2 show the structural representation of conversion control in the fluid conversion equipment of present invention offer.
The assembling schematic diagram of conversion cradle and conversion control when Fig. 3 show fluid conversion equipment positioned at the first station.
Fluid when Fig. 4 show fluid conversion equipment positioned at the first station flows to schematic diagram.
The assembling schematic diagram of conversion cradle and conversion control when Fig. 5 show fluid conversion equipment positioned at the second station.
Fluid when Fig. 6 show fluid conversion equipment positioned at the second station flows to schematic diagram.
The assembling schematic diagram of conversion cradle and conversion control when Fig. 7 show fluid conversion equipment positioned at 3rd station.
Fluid when Fig. 8 show fluid conversion equipment positioned at 3rd station flows to schematic diagram.
Fig. 9 show the structural representation of piston component in fluid conversion equipment.
Specific embodiment
As shown in Figure 1 to Figure 3, in the present embodiment, flow direction conversion equipment includes body 100 and conversion control 200.
Body 100 includes conversion cradle 1, has fluid inlet hole 11, Fluid-exiting apertures 12, the first connecting hole 13 and second on conversion cradle 1
Connecting hole 14, the first connecting hole 13 and the second connecting hole 14 are connected with outer closures device 300.Conversion control 200 and conversion
Base 1 is connected, and has the first connecting tube 201, the second connecting tube 202 and the 3rd connecting tube 203 on conversion control 200.
In the present embodiment, the flow direction conversion equipment is used for hydraulic pump, and the outer closures device 300 is oil
Chamber.However, the present invention is not limited in any way to this.In other embodiments, the flow direction conversion equipment that the present invention is provided is same
Change in the direction that sample is applied to current.
The flow direction conversion equipment that Fig. 3 and Fig. 4 sets forth the present embodiment offer changes bottom when being located at the first station
Seat flows to schematic diagram with the assembling schematic diagram and fluid for changing control.On the first station, the two ends of the second connecting tube 202
E and E1 is connected with fluid inlet hole 11 and Fluid-exiting apertures 12, and fluid is through the second connecting tube 202 in fluid inlet hole 11 and Fluid-exiting apertures
Circulated between 12, fluid is introduced into oil pocket.Under the station, because fluid (being hydraulic oil in the present embodiment) is introduced into oil
Chamber, the power set 400 (push rod or piston rod) being connected in oil pocket will not work.
The flow direction conversion equipment that Fig. 5 and Fig. 6 sets forth the present embodiment offer changes bottom when being located at the second station
Seat flows to schematic diagram with the assembling schematic diagram and fluid for changing control.Now, as shown in figure 5, the two of the first connecting tube 201
End D and D1 is connected with the first connecting hole 13 and Fluid-exiting apertures 12 respectively, and the two ends F1 and F of the 3rd connecting tube 203 are respectively with the
Two connecting holes 14 are connected with fluid inlet hole 11, and fluid flows into the of oil pocket 300 through the 3rd connecting tube 203 from the second connecting hole 14
In one cavity 301, oily power set 400 are promoted to travel forward, the fluid in the second cavity 302 is through the second connecting hole the 14, the 3rd
Connecting tube 203 flows out from Fluid-exiting apertures 12, forms first fluid circulation in direction.
The flow direction conversion equipment that Fig. 7 and Fig. 8 sets forth the present embodiment offer changes bottom when being located at 3rd station
Seat flows to schematic diagram with the assembling schematic diagram and fluid for changing control.Now, the two ends D1 and D of the first connecting tube 201 point
Be not connected with the first connecting hole 13 and fluid inlet hole 11, the two ends F and F1 of the 3rd connecting tube 203 respectively with the second connecting hole 14
It is connected with Fluid-exiting apertures 12, fluid flows into the second cavity 302 through the first connecting tube 201 from the first connecting hole 13, and power is filled
Put 400 and push back to initial position, the hydraulic oil in the first cavity 301 is through the second connecting hole 14 and the 3rd connecting tube 203 from fluid
Portal 12 outflows, form second fluid circulation in direction.The alternation of the second station and 3rd station causes power set
Reciprocating motion can be automatically obtained, compared to traditional oil circuit switching valve, the flow direction conversion device structure that the present invention is provided is simple,
Enormously simplify the distribution of oil circuit.
In the present embodiment, fluid inlet hole 11 and Fluid-exiting apertures 12 are oppositely arranged, the first connecting hole 13 and the second connecting hole
14 are oppositely arranged, the center of line and the first connecting hole 13 between the center of fluid inlet hole 11 and the center of Fluid-exiting apertures 12 and
Line between the center of the second connecting hole 14 is perpendicular, and the first connecting hole 13 is arrived between fluid inlet hole 11 and Fluid-exiting apertures 12
Distance it is equal, the second connecting hole 14 is equal to the distance between fluid inlet hole 11 and Fluid-exiting apertures 12.Corresponding, such as Fig. 2
Shown, on conversion control 200, the first connecting tube 201 is identical with the structure of the 3rd connecting tube 203 and is symmetricly set on the second connecting tube
202 both sides.The setting causes, when change control 200 by the first station can be realized when both sides rotate to the left and right the first station and
The switching of the second station.However, the present invention is not limited in any way to this.
In the present embodiment, connection is rotated between conversion control 200 and conversion cradle 1, to realize between different station
Switching, it is preferred that the first connecting tube 201, the second connecting tube 202 and the 3rd connecting tube 203 are set and are arranged on conversion in arc-shaped
On control 200.The setting causes that user makees using the first connecting tube 201, the second connecting tube 202 and the 3rd connecting tube 203
Realize changing the rotation of control 200 for swing handle.However, the present invention is not limited in any way to this.
To realize the accurate switching between the first station, the second station and 3rd station, in other the present embodiment, can set
The limiting section on conversion control 200 and conversion cradle 1 with limitation conversion control rotational angle is put, limiting section turns including being arranged on
Refoot on seat three arc grooves and be arranged on conversion control on the lug boss being engaged with three arc grooves, three
Arc groove is correspondingly arranged with fluid inlet hole, the first connecting hole and the second connecting hole respectively.However, the present invention does not make any to this
Limit.In other embodiments, can be in the position corresponding to conversion cradle upper fluid inlet hole, the first connecting hole and the second connecting hole
Three station location markers of upper setting, are also equipped with rotating mark, by rotating mark and corresponding position on corresponding conversion control
Conversion control is characterized when mark is to correspondence to rotate in place.
It is detachable connection between conversion cradle 1 and body 100 in the present embodiment, the setting is greatly facilitated
The replacing and maintenance of conversion cradle 1.
The flow direction conversion equipment that the present embodiment is provided is applied on hydraulic tool, therefore, such as Fig. 1 in the present embodiment
One end of shown body has the connecting portion 2 being connected with outer eccentric drive component, has multiple on connecting portion 2 along eccentric shaft
Circumferentially disposed piston component 21, there are the through holes of multiple connection conversion cradles (due to angle on each piston component 21
Problem, not shown).
As shown in figure 9, each piston component 21 includes spring base 211, spring 212, piston 213 and oil switch 214 living.
Spring 212 is fixed on spring base 211.Piston 213 is connected with spring 212, has multiple connection conversion cradles on piston 213
Through hole.Oil switch 214 living is sheathed on spring 212 and positioned at piston 213 near the side of spring base 211.Specific operation principle
For：Outer eccentric drive component extrudes multiple along its circumferentially disposed piston component 21 in rotation process, in piston component 21
Piston 313 on there are the through holes of multiple connection conversion cradles, piston 213 is in eccentric drive component 400,214 and of oil switch living
Moved back and forth in the presence of spring 212, squeeze the oily via through holes in fuel tank, conversion control and conversion cradle during motion
It is pressed into oil pocket.Pressure in oil pocket increases, and promotes propulsion power device 400 to move.In the second station, propulsion power dress
Put 400 to travel forward, in 3rd station, propulsion power device 400 is moved backward, recover to initial position.
It is that, with enough oil reserves, in the present embodiment, flow direction conversion equipment is also intrinsic including being arranged on
And be connected with fluid inlet hole and Fluid-exiting apertures to two fluid storage tanks 3.However, number of the present invention to fluid storage tank 3
Amount is not limited in any way.
In sum, the flow direction conversion equipment that the present invention is provided is gone out by setting fluid inlet hole, fluid on body
Hole, the first connecting hole and the second connecting hole are simultaneously set and fluid inlet hole, Fluid-exiting apertures, the first connecting hole and the on conversion control
Three connecting tubes that two connecting holes are connected.Cause that conversion control is operated in not by changing three link positions of connecting tube
On same station, on the second station, fluid is flowed into through the second connecting hole, the outflow of the first connecting hole, realizes the stream of first direction
Body circulation；And in 3rd station, fluid is flowed into through the first connecting hole, the fluid of second direction is realized in the outflow of the second connecting hole
Circulation.
Additionally, being additionally provided with the connecting portion being connected with outer eccentric drive device on body, therefore can directly be installed at
Realize that the automatic of piston in hydraulic cylinder moves forward and backward on traditional hydraulic pump.It is not only greatly convenient for users to use, while
Also significantly reduce cost.
Although the present invention is disclosed above by preferred embodiment, but the present invention is not limited to, it is any to know this skill
Skill person, without departing from the spirit and scope of the present invention, can make a little change and retouching, therefore protection scope of the present invention is worked as
It is defined depending on claims scope required for protection.
Claims (9)
1. a kind of flow direction conversion equipment, it is characterised in that including：
Body, including conversion cradle, there is fluid inlet hole, Fluid-exiting apertures, the first connecting hole and second to connect on the conversion cradle
Hole is connect, first connecting hole and the second connecting hole are connected with outer closures device；
Conversion control, is connected with the conversion cradle, has the first connecting tube, the second connecting tube and the on the conversion control
Three connecting tubes；
On the first station, the two ends of the second connecting tube are connected with fluid inlet hole and Fluid-exiting apertures, and fluid is through the second connecting tube
Circulated between fluid inlet hole and Fluid-exiting apertures, fluid is introduced into outer closures device；
On the second station, the two ends of the first connecting tube are connected with the first connecting hole and Fluid-exiting apertures respectively, the 3rd connecting tube
Two ends be connected with the second connecting hole and fluid inlet hole respectively, fluid flows into outside envelope through the 3rd connecting tube from the second connecting hole
The first cavity closed in device, fluid in the second cavity of outer closures device is through the first connecting hole, the first connecting tube from stream
Body portals outflow, forms first fluid circulation in direction；
In 3rd station, the two ends of the first connecting tube are connected with the first connecting hole and fluid inlet hole respectively, the 3rd connecting tube
Two ends be connected with the second connecting hole and Fluid-exiting apertures respectively, fluid flows into outside envelope through the first connecting tube from the first connecting hole
The second cavity closed in device, fluid in the first cavity of outer closures device is through the second connecting hole, the 3rd connecting tube from stream
Body portals outflow, forms second fluid circulation in direction.
2. flow direction conversion equipment according to claim 1, it is characterised in that fluid inlet hole and Fluid-exiting apertures are relative sets
Put, the first connecting hole and the second connecting hole are oppositely arranged, the line between fluid inlet hole center and Fluid-exiting apertures center and first
Line between connecting hole center and the second connecting hole center is perpendicular.
3. flow direction conversion equipment according to claim 1, it is characterised in that first connecting tube, the second connection
Pipe and the 3rd connecting tube are arranged on conversion control in arc-shaped.
4. flow direction conversion equipment according to claim 1, it is characterised in that conversion control is rotated with conversion cradle and connected
Connect, cause that flow direction conversion equipment is cut between the first station, the second station and 3rd station by rotating conversion control
Change.
5. flow direction conversion equipment according to claim 4, it is characterised in that on the conversion control and conversion cradle
Limiting section with limitation conversion control rotational angle, the limiting section includes three arc grooves being arranged on conversion cradle
And be arranged on conversion control on the lug boss being engaged with three arc grooves, three arc grooves respectively with
Fluid inlet hole, the first connecting hole and the second connecting hole are correspondingly arranged.
6. flow direction conversion equipment according to claim 1, it is characterised in that the conversion cradle and body are detachable
Formula is connected.
7. flow direction conversion equipment according to claim 1, it is characterised in that one end of the body has and outside
The connecting portion that eccentric drive component is connected, has multiple circumferentially disposed piston components along eccentric shaft on the connecting portion,
There is the through hole of multiple connection conversion cradles on each piston component.
8. flow direction conversion equipment according to claim 7, it is characterised in that each piston component includes：
Spring base；
Spring, is fixed on the spring base；
Piston, is connected with the spring, has multiple through holes being connected with conversion cradle on the piston；
Oil switch living, is sheathed on the spring and positioned at the piston near the side of spring base.
9. flow direction conversion equipment according to claim 1, it is characterised in that the flow direction conversion equipment is also wrapped
Include and be arranged at least one fluid storage tank that is intrinsic and being connected with fluid inlet hole and Fluid-exiting apertures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076622.6A CN106762959B (en) | 2017-02-13 | 2017-02-13 | Flow direction conversion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076622.6A CN106762959B (en) | 2017-02-13 | 2017-02-13 | Flow direction conversion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106762959A true CN106762959A (en) | 2017-05-31 |
| CN106762959B CN106762959B (en) | 2018-04-17 |
Family
ID=58956036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710076622.6A Active CN106762959B (en) | 2017-02-13 | 2017-02-13 | Flow direction conversion equipment |
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| Country | Link |
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| CN (1) | CN106762959B (en) |
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|---|---|---|---|---|
| US3135170A (en) * | 1955-12-13 | 1964-06-02 | Starrfraesmaschinen Ag | Hydraulic control for moving elements of a machine tool |
| CN103062430A (en) * | 2013-01-15 | 2013-04-24 | 东莞市骏兴机械科技有限公司 | Rotary fluid control valve |
| CN103775441A (en) * | 2014-01-26 | 2014-05-07 | 天津大学 | Electrical feedback large-scale servo hydraulic cylinder driven by double motors |
| CN105692791A (en) * | 2016-02-02 | 2016-06-22 | 北京工业大学 | Pressure energy recovery method based on rotary liquid switcher |
| CN105712438A (en) * | 2016-02-02 | 2016-06-29 | 北京工业大学 | Pressure energy recovering method based on rotary self-sealing liquid switchers |
| CN106321544A (en) * | 2016-11-03 | 2017-01-11 | 杭州欧盾机电有限公司 | Conversion valve |
| CN206478058U (en) * | 2017-02-13 | 2017-09-08 | 杭州欧盾机电有限公司 | Flow direction conversion equipment |
-
2017
- 2017-02-13 CN CN201710076622.6A patent/CN106762959B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3135170A (en) * | 1955-12-13 | 1964-06-02 | Starrfraesmaschinen Ag | Hydraulic control for moving elements of a machine tool |
| CN103062430A (en) * | 2013-01-15 | 2013-04-24 | 东莞市骏兴机械科技有限公司 | Rotary fluid control valve |
| CN103775441A (en) * | 2014-01-26 | 2014-05-07 | 天津大学 | Electrical feedback large-scale servo hydraulic cylinder driven by double motors |
| CN105692791A (en) * | 2016-02-02 | 2016-06-22 | 北京工业大学 | Pressure energy recovery method based on rotary liquid switcher |
| CN105712438A (en) * | 2016-02-02 | 2016-06-29 | 北京工业大学 | Pressure energy recovering method based on rotary self-sealing liquid switchers |
| CN106321544A (en) * | 2016-11-03 | 2017-01-11 | 杭州欧盾机电有限公司 | Conversion valve |
| CN206478058U (en) * | 2017-02-13 | 2017-09-08 | 杭州欧盾机电有限公司 | Flow direction conversion equipment |
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| Publication number | Publication date |
|---|---|
| CN106762959B (en) | 2018-04-17 |
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Address after: 310000 E 157, 2 floor, 688 Binan Road, Changhe street, Binjiang District, Hangzhou, Zhejiang. Patentee after: Europe Shield Technology Co., Ltd. Address before: 310000 E 157, 2 floor, 688 Binan Road, Changhe street, Binjiang District, Hangzhou, Zhejiang. Patentee before: Hangzhou Oudun Electromechanical Co., Ltd. |
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