CN107570739B - A kind of vibration drilling auxiliary machining device - Google Patents
A kind of vibration drilling auxiliary machining device Download PDFInfo
- Publication number
- CN107570739B CN107570739B CN201711075859.9A CN201711075859A CN107570739B CN 107570739 B CN107570739 B CN 107570739B CN 201711075859 A CN201711075859 A CN 201711075859A CN 107570739 B CN107570739 B CN 107570739B
- Authority
- CN
- China
- Prior art keywords
- circular
- ring shape
- circular ring
- cylindrical housing
- annulus
- 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.)
- Expired - Fee Related
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 17
- 238000003754 machining Methods 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
- Drilling And Boring (AREA)
Abstract
The present invention relates to hole machined technology, specifically a kind of vibration drilling auxiliary machining device.The present invention solves the problems, such as traditional hole machined mode, and when processing the small deep hole or difficult-to-machine material of big L/D ratio, processing efficiency is low, machining accuracy is poor, tool wear is serious, heat dissipation effect is bad.A kind of vibration drilling auxiliary machining device, including cylindrical housing, circular upper cover, round lower cover, input shaft, output shaft, tapered roller bearing, separation annulus, circular ring shape exciting, positioning annulus, N number of ball, reset spring, thrust ball bearing；N is positive integer, and N >=3；Wherein, the top and bottom of cylindrical housing are equipped with opening；The upper end that circular upper cover is covered in cylindrical housing is open, and the end face middle thereof of circular upper cover offers the first assembly circular hole；The lower end that round lower cover is covered in cylindrical housing is open, and the end face middle thereof of round lower cover offers the second assembly circular hole.The present invention is suitable for hole machined.
Description
Technical field
The present invention relates to hole machined technology, specifically a kind of vibration drilling auxiliary machining device.
Background technique
In traditional hole machined mode, the motion mode of drilling cutters is single movement (being only limitted to rotate), thus band
The problem come is: when processing the small deep hole or difficult-to-machine material (metal, composite material etc.) of big L/D ratio, traditional hole adds
The generally existing problem that processing efficiency is low, machining accuracy is poor, tool wear is serious, heat dissipation effect is bad of work mode.Based on this, have
Necessity invents a kind of completely new hole processing device, to solve in a manner of traditional hole machined in the small deep hole of processing big L/D ratio or
The problem that processing efficiency is low when difficult-to-machine material, machining accuracy is poor, tool wear is serious, heat dissipation effect is bad.
Summary of the invention
The present invention in order to solve traditional hole machined mode process big L/D ratio small deep hole or difficult-to-machine material when
The problem that processing efficiency is low, machining accuracy is poor, tool wear is serious, heat dissipation effect is bad provides a kind of vibration drilling
Auxiliary machining device.
The present invention is achieved by the following technical scheme:
A kind of vibration drilling auxiliary machining device, including cylindrical housing, circular upper cover, round lower cover, input shaft,
Output shaft, tapered roller bearing separate annulus, circular ring shape exciting, positioning annulus, N number of ball, reset spring, thrust ball axis
It holds；N is positive integer, and N >=3；
Wherein, the top and bottom of cylindrical housing are equipped with opening；Circular upper cover is covered in the upper end of cylindrical housing
Opening, and the end face middle thereof of circular upper cover offers the first assembly circular hole；Round lower cover is covered under cylindrical housing
End is open, and the end face middle thereof of round lower cover offers the second assembly circular hole；Input shaft rotationally runs through the first assembly
Circular hole, and the lower end surface of input shaft offers spline；Output shaft rotationally runs through the second assembly circular hole, and output shaft is upper
End face is equipped with the spline cooperated with spline；The lateral surface of output shaft is equipped with round ring boss；The side of round ring boss and circle
The medial surface clearance fit of cylindrical outer casing；The upper surface of round ring boss offers the first circular ring shape arc slot；Round ring boss
Lower end surface offers the first circular ring shape square groove；
The outer ring lateral surface of tapered roller bearing and the medial surface of cylindrical housing are interference fitted；Tapered roller bearing it is interior
The lateral surface for enclosing medial surface and input shaft is interference fitted；The upper surface of tapered roller bearing and the lower end surface of circular upper cover close to；
Separate the outside that annulus is sheathed on input shaft, and separates the lateral surface of annulus and the medial surface clearance fit of cylindrical housing；Point
Every the upper surface of annulus and the outer ring lower end face contact of tapered roller bearing；The lateral surface and cylindrical housing of circular ring shape exciting
Medial surface interference fit；The medial surface of circular ring shape exciting and the lateral surface clearance fit of input shaft；Circular ring shape exciting
Upper surface and the lower end face contact for separating annulus；The lower end surface of circular ring shape exciting offers the second circular ring shape arc slot；Second circle
The line of rabbet joint of circular arc slot is the annular sine curve in N number of period；The lower end surface outer ring of circular ring shape exciting and lower end surface inner ring are equal
For the annular sine surface in N number of period；
Position the lateral surface of annulus and the medial surface clearance fit of cylindrical housing；Position the medial surface and input shaft of annulus
Lateral surface interference fit；Position annulus upper surface and circular ring shape exciting lower end surface close to；Position the lower end surface of annulus
With the upper surface of round ring boss close to；The end face perforation of positioning annulus offers N number of positioning round orifice, and N number of positioning round orifice edge
Circumferentially equidistant arrangement；N number of ball rolls be arranged in N number of positioning round orifice correspondingly；The lower part of N number of ball rolls and is embedded
In in the first circular ring shape arc slot；The top of N number of ball, which rolls, to be embedded in the second circular ring shape arc slot；Reset spring is sheathed on defeated
The outside of shaft, and the upper end of reset spring is embedded in the first circular ring shape square groove；Thrust ball bearing is sheathed on the outer of output shaft
Side；The seat ring lower end surface of thrust ball bearing and the upper surface of round lower cover are fixed；The blowout patche upper surface of thrust ball bearing and reset
The lower end of spring is fixed.
When work, cylindrical housing is installed on lathe base, and the upper end of input shaft is equipped with standard knife handle, standard knife handle
It is connect with machine tool chief axis, the lower end of output shaft is equipped with elastic collet, is equipped with drilling cutters on elastic collet.Specific works mistake
Journey is as follows: when carrying out hole machined, machine tool chief axis passes sequentially through standard knife handle, input shaft, output shaft, elastic collet and drives drilling
Cutter is rotated.During rotation, input shaft drives the inner ring of tapered roller bearing and positioning annulus to be rotated, and positions
Annulus drives N number of ball to be rotated along the second circular ring shape arc slot.Output shaft drives round ring boss to be rotated, circular ring shape
Boss drives reset spring to be rotated, and reset spring drives the blowout patche of thrust ball bearing to be rotated.Due to the second circular ring shape
The line of rabbet joint of arc slot is the annular sine curve in N number of period, and reset spring passes through round ring boss always and applies axis to N number of ball
To thrust, so that N number of ball is vibrated while rotation along axial direction, (machine tool chief axis per revolution, N number of ball vibrate
N times) so that round ring boss, output shaft, elastic collet, drilling cutters are vibrated along axial direction together, so that boring
Cutting knife tool is rotated and is vibrated simultaneously.In above process, the effect for separating annulus is by tapered roller bearing and circular ring shape
Exciting is isolated, so that tapered roller bearing is conveniently replaceable.
Based on the above process, compared with traditional hole machined mode, a kind of vibration drilling auxiliary of the present invention
Processing unit (plant) is by using brand new, so that the motion mode of drilling cutters is converted into compound motion (simultaneously by single movement
Rotated and vibrated), therefore when processing the small deep hole or difficult-to-machine material (metal, composite material etc.) of big L/D ratio,
Processing efficiency of the invention is higher, machining accuracy is higher, tool wear is less, better heat-radiation effect.
Structure of the invention is reasonable, ingenious in design, efficiently solves traditional hole machined mode in the small of processing big L/D ratio
The problem that processing efficiency is low when deep hole or difficult-to-machine material, machining accuracy is poor, tool wear is serious, heat dissipation effect is bad is fitted
For hole machined.
Detailed description of the invention
Fig. 1 is external structure schematic diagram of the invention.
Fig. 2 is schematic diagram of internal structure of the invention.
Fig. 3 is the structural schematic diagram of circular ring shape exciting in the present invention.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the A-A cross-sectional view of Fig. 4.
Fig. 6 is the B-B cross-sectional view of Fig. 4.
Fig. 7 is the C-C cross-sectional view of Fig. 4.
In figure: 1- cylindrical housing, 2- circular upper cover, 3- circle lower cover, 4- input shaft, 5- output shaft, 6- taper roller
Bearing, 7- separate annulus, and 8- circular ring shape exciting is sub, 9- positioning annulus, 10- ball, 11- reset spring, 12- thrust ball bearing,
13- circlip, the first screw of 14-, the second screw of 15-, 16- elastic collet.
Specific embodiment
A kind of vibration drilling auxiliary machining device, including cylindrical housing 1, circular upper cover 2, round lower cover 3, input
Axis 4, tapered roller bearing 6, separates annulus 7, circular ring shape exciting 8, positioning annulus 9, N number of ball 10, resets bullet output shaft 5
Spring 11, thrust ball bearing 12；N is positive integer, and N >=3；
Wherein, the top and bottom of cylindrical housing 1 are equipped with opening；Circular upper cover 2 is covered in the upper of cylindrical housing 1
End is open, and the end face middle thereof of circular upper cover 2 offers the first assembly circular hole；Round lower cover 3 is covered in cylindrical housing 1
Lower end it is open, and the end face middle thereof of round lower cover 3 offers the second assembly circular hole；Input shaft 4 is rotationally through the
One assembly circular hole, and the lower end surface of input shaft 4 offers spline；Output shaft 5 rotationally assembles circular hole through second, and defeated
The upper surface of shaft 5 is equipped with the spline cooperated with spline；The lateral surface of output shaft 5 is equipped with round ring boss；Round ring boss
Side and cylindrical housing 1 medial surface clearance fit；The upper surface of round ring boss offers the first circular ring shape arc slot；Circle
The lower end surface of annular convex platform offers the first circular ring shape square groove；
The outer ring lateral surface of tapered roller bearing 6 and the medial surface of cylindrical housing 1 are interference fitted；Tapered roller bearing 6
Inner ring medial surface and input shaft 4 lateral surface be interference fitted；The upper surface of tapered roller bearing 6 and the lower end of circular upper cover 2
Face paste is close；Separate the outside that annulus 7 is sheathed on input shaft 4, and separates the lateral surface of annulus 7 and the medial surface of cylindrical housing 1
Clearance fit；Separate the upper surface of annulus 7 and the outer ring lower end face contact of tapered roller bearing 6；The outside of circular ring shape exciting 8
The medial surface of face and cylindrical housing 1 is interference fitted；The medial surface of circular ring shape exciting 8 is matched with the lateral surface gap of input shaft 4
It closes；The upper surface of circular ring shape exciting 8 and the lower end face contact for separating annulus 7；The lower end surface of circular ring shape exciting 8 offers
Two circular ring shape arc slots；The line of rabbet joint of second circular ring shape arc slot is the annular sine curve in N number of period；The lower end of circular ring shape exciting 8
Face outer ring and lower end surface inner ring are the annular sine surface in N number of period；
Position the lateral surface of annulus 9 and the medial surface clearance fit of cylindrical housing 1；Position annulus 9 medial surface with it is defeated
Enter the lateral surface interference fit of axis 4；Position annulus 9 upper surface and circular ring shape exciting 8 lower end surface close to；Position annulus 9
Lower end surface and round ring boss upper surface close to；The end face perforation of positioning annulus 9 offers N number of positioning round orifice, and N number of fixed
Circle of position hole circumferentially equidistant arrangement；N number of ball 10 rolls be arranged in N number of positioning round orifice correspondingly；Under N number of ball 10
Portion, which rolls, to be embedded in the first circular ring shape arc slot；The top of N number of ball 10, which rolls, to be embedded in the second circular ring shape arc slot；It is multiple
Position spring 11 is sheathed on the outside of output shaft 5, and the upper end of reset spring 11 is embedded in the first circular ring shape square groove；Thrust ball axis
Hold 12 outsides for being sheathed on output shaft 5；The seat ring lower end surface of thrust ball bearing 12 and the upper surface of round lower cover 3 are fixed；Thrust
The blowout patche upper surface of ball bearing 12 and the lower end of reset spring 11 are fixed.
The lateral surface of input shaft 4 offers the second circular ring shape square groove, and the second circular ring shape square groove is located at tapered roller bearing 6
Upper surface and circular upper cover 2 lower end surface between；Circlip 13 is embedded in second circular ring shape square groove.
Circular upper cover 2 is open by the upper end that six the first screws 14 are covered in cylindrical housing 1；Round lower cover 3 passes through
The lower end that six the second screws 15 are covered in cylindrical housing 1 is open.
When it is implemented, the value of N is 4.The amplitude of the sinusoidal amplitude of annular and annular sine surface is 0.1 ~
0.2mm。
Claims (3)
1. a kind of vibration drilling auxiliary machining device, it is characterised in that: including cylindrical housing (1), circular upper cover (2),
Round lower cover (3), input shaft (4), output shaft (5), tapered roller bearing (6), separate annulus (7), circular ring shape exciting (8),
Position annulus (9), N number of ball (10), reset spring (11), thrust ball bearing (12)；N is positive integer, and N >=3；
Wherein, the top and bottom of cylindrical housing (1) are equipped with opening；Circular upper cover (2) is covered in cylindrical housing (1)
Upper end is open, and the end face middle thereof of circular upper cover (2) offers the first assembly circular hole；Round lower cover (3) is covered in cylinder
The lower end of shape shell (1) is open, and the end face middle thereof of round lower cover (3) offers the second assembly circular hole；Input shaft (4) can
Rotationally through the first assembly circular hole, and the lower end surface of input shaft (4) offers spline；Output shaft (5) rotationally runs through
Second assembly circular hole, and the upper surface of output shaft (5) is equipped with the spline cooperated with spline；The lateral surface of output shaft (5) is equipped with
Round ring boss；The side of round ring boss and the medial surface clearance fit of cylindrical housing (1)；The upper surface of round ring boss
Offer the first circular ring shape arc slot；The lower end surface of round ring boss offers the first circular ring shape square groove；
The outer ring lateral surface of tapered roller bearing (6) and the medial surface of cylindrical housing (1) are interference fitted；Tapered roller bearing
(6) lateral surface of inner ring medial surface and input shaft (4) is interference fitted；The upper surface of tapered roller bearing (6) and circular upper cover
(2) lower end surface close to；Separate the outside that annulus (7) are sheathed on input shaft (4), and separates the lateral surface and cylinder of annulus (7)
The medial surface clearance fit of shape shell (1)；The outer ring lower end surface of the upper surface and tapered roller bearing (6) that separate annulus (7) connects
Touching；The lateral surface of circular ring shape exciting (8) and the medial surface of cylindrical housing (1) are interference fitted；Circular ring shape exciting (8) it is interior
The lateral surface clearance fit of side and input shaft (4)；The upper surface of circular ring shape exciting (8) and the lower end surface for separating annulus (7)
Contact；The lower end surface of circular ring shape exciting (8) offers the second circular ring shape arc slot；The line of rabbet joint of second circular ring shape arc slot is N number of week
The annular sine curve of phase；The lower end surface outer ring of circular ring shape exciting (8) and lower end surface inner ring are that the annular in N number of period is sinusoidal
Curved surface；
Position the lateral surface of annulus (9) and the medial surface clearance fit of cylindrical housing (1)；Position annulus (9) medial surface with
The lateral surface of input shaft (4) is interference fitted；Position annulus (9) upper surface and circular ring shape exciting (8) lower end surface close to；It is fixed
The lower end surface of circle of position ring (9) and the upper surface of round ring boss close to；The end face perforation of positioning annulus (9) offers N number of positioning
Circular hole, and N number of positioning round orifice circumferentially equidistant arrangement；N number of ball (10) rolls be arranged in N number of positioning round orifice correspondingly
It is interior；The lower part of N number of ball (10), which rolls, to be embedded in the first circular ring shape arc slot；The top of N number of ball (10), which rolls, to be embedded
In in the second circular ring shape arc slot；Reset spring (11) is sheathed on the outside of output shaft (5), and the upper end of reset spring (11) is embedded
In in the first circular ring shape square groove；Thrust ball bearing (12) is sheathed on the outside of output shaft (5)；Under the seat ring of thrust ball bearing (12)
End face and the upper surface of round lower cover (3) are fixed；The blowout patche upper surface of thrust ball bearing (12) and the lower end of reset spring (11)
It is fixed.
2. a kind of vibration drilling auxiliary machining device according to claim 1, it is characterised in that: input shaft (4)
Lateral surface offers the second circular ring shape square groove, and the second circular ring shape square groove is located at upper surface and the circle of tapered roller bearing (6)
Between the lower end surface of upper cover (2)；Circlip (13) are embedded in second circular ring shape square groove.
3. a kind of vibration drilling auxiliary machining device according to claim 1 or 2, it is characterised in that: circular upper cover
(2) upper end for being covered in cylindrical housing (1) by six the first screws (14) is open；Round lower cover (3) passes through six second
The lower end that screw (15) is covered in cylindrical housing (1) is open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711075859.9A CN107570739B (en) | 2017-11-06 | 2017-11-06 | A kind of vibration drilling auxiliary machining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711075859.9A CN107570739B (en) | 2017-11-06 | 2017-11-06 | A kind of vibration drilling auxiliary machining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107570739A CN107570739A (en) | 2018-01-12 |
| CN107570739B true CN107570739B (en) | 2019-05-31 |
Family
ID=61041348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711075859.9A Expired - Fee Related CN107570739B (en) | 2017-11-06 | 2017-11-06 | A kind of vibration drilling auxiliary machining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107570739B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637290A (en) * | 2018-05-21 | 2018-10-12 | 晋西工业集团有限责任公司 | A kind of processing method of deep hole |
| CN109079203B (en) * | 2018-08-23 | 2020-01-10 | 大连理工大学 | Modular micro pecking device for automatic feeding drill |
| CN110116312A (en) * | 2019-05-29 | 2019-08-13 | 浙江双正科技股份有限公司 | A kind of reversely hung Yong waterwheel |
| CN110480062A (en) * | 2019-09-29 | 2019-11-22 | 河北工业大学 | A kind of cam mechanism type axial vibration drilling equipment |
| CN110695414A (en) * | 2019-10-28 | 2020-01-17 | 西安石油大学 | Amplitude-adjustable low-frequency axial vibration drilling device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU844139A1 (en) * | 1979-08-15 | 1981-07-07 | Предприятие П/Я А-7332 | Chuck for vibration working of parts |
| CN86206994U (en) * | 1986-09-19 | 1987-11-07 | 何章鸣 | Vibrating and rotating grinding wheel head attached to a lathe |
| CN1476949A (en) * | 2003-06-18 | 2004-02-25 | 北京航空航天大学 | Vibration equipment for drilling |
| CN203401108U (en) * | 2013-07-30 | 2014-01-22 | 东莞宝顺力电子塑胶制品厂有限公司 | Impact output mechanism of impact drilling tool |
| CN107052401A (en) * | 2017-05-15 | 2017-08-18 | 北京航空航天大学 | A kind of axial low frequency rotary vibration device applied to difficult-to-machine material deep hole machining |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3505442A1 (en) * | 1985-02-16 | 1986-08-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Device for producing blows in a percussion drilling machine |
| RU1771890C (en) * | 1988-02-26 | 1992-10-30 | Производственное Объединение "Мосстанкосервис" | Shock-and-drill head for hand tool |
| RU1785495C (en) * | 1991-01-25 | 1992-12-30 | Арендное Территориально-Производственное Объединение "Пульс" | Tool fixture |
| GB201504106D0 (en) * | 2015-03-11 | 2015-04-22 | Iti Scotland Ltd | Resonance enhanced rotary drilling actuator |
-
2017
- 2017-11-06 CN CN201711075859.9A patent/CN107570739B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU844139A1 (en) * | 1979-08-15 | 1981-07-07 | Предприятие П/Я А-7332 | Chuck for vibration working of parts |
| CN86206994U (en) * | 1986-09-19 | 1987-11-07 | 何章鸣 | Vibrating and rotating grinding wheel head attached to a lathe |
| CN1476949A (en) * | 2003-06-18 | 2004-02-25 | 北京航空航天大学 | Vibration equipment for drilling |
| CN203401108U (en) * | 2013-07-30 | 2014-01-22 | 东莞宝顺力电子塑胶制品厂有限公司 | Impact output mechanism of impact drilling tool |
| CN107052401A (en) * | 2017-05-15 | 2017-08-18 | 北京航空航天大学 | A kind of axial low frequency rotary vibration device applied to difficult-to-machine material deep hole machining |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107570739A (en) | 2018-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107570739B (en) | A kind of vibration drilling auxiliary machining device | |
| JP5870099B2 (en) | Cutting inserts and holders for rotary applications | |
| US10112277B2 (en) | Combined type angle head milling cutter for machining mounting faces of axial bearing | |
| EP2964420B1 (en) | Turbine driven power unit for a cutting tool | |
| JP6490060B2 (en) | Tool shaft with active magnetic bearings | |
| US10399194B2 (en) | Rotary table assembly with cover | |
| KR101575198B1 (en) | A device for processing a key groove | |
| JP2017087383A (en) | Cover for sucking chip, and machine tool | |
| CN204209147U (en) | Compound tool | |
| CN209736653U (en) | Efficient multitool head tool rest | |
| CN206839687U (en) | A kind of handle of a knife component for machine tool | |
| CN109014778B (en) | Numerical control machining method for sealing ring groove of non-rotating part | |
| CN207405323U (en) | It is a kind of that there is the sewing machine of joint-cutting | |
| CN201189680Y (en) | Flat-plate cut-off machine with turning functional knife head | |
| WO2008134095A3 (en) | Spherical internal motion cutting tool | |
| CN216599286U (en) | Motor with copying rotary table | |
| CN213437437U (en) | Milling cutter convenient to change milling cutter edge | |
| JP6749806B2 (en) | Precision hole finishing device | |
| CN102699395B (en) | Helical milling device | |
| CN216575594U (en) | Eccentric expansion sleeve of lathe | |
| CN202763211U (en) | Machining knife with support structure | |
| CN111659958B (en) | Power chamfering device for radial holes on inner side walls of small holes | |
| JP5547920B2 (en) | U-axis holder unit | |
| CN217571046U (en) | Vertical and horizontal dual-purpose milling head | |
| CN210755210U (en) | Milling machine spindle for processing watchcase |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190531 |