CN209516820U - A kind of electric pushrod - Google Patents
A kind of electric pushrod Download PDFInfo
- Publication number
- CN209516820U CN209516820U CN201920499183.4U CN201920499183U CN209516820U CN 209516820 U CN209516820 U CN 209516820U CN 201920499183 U CN201920499183 U CN 201920499183U CN 209516820 U CN209516820 U CN 209516820U
- Authority
- CN
- China
- Prior art keywords
- shaft
- electric pushrod
- speed reducer
- connecting rod
- mounting blocks
- 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
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model discloses a kind of electric pushrods, including motor, the speed reducer that is connected to motor, the shaft of output end for being connected to speed reducer, the connecting rod that is connected in shaft, motor is rotated for drive shaft to drive connecting rod linear reciprocating motion, it further include the mounting blocks being cooperatively connected using thrust bearing and shaft, mounting blocks are fixedly connected with speed reducer.Since shaft is cooperatively connected by thrust bearing and mounting blocks, therefore, when the band dynamic load of shaft drive link does linear reciprocating motion by axial force, the axial compressive force being subject to will be transferred on mounting blocks by shaft by thrust bearing, output end without being transferred directly to speed reducer, it can avoid speed reducer and motor to be damaged by excessive pressure, the bearing capacity of electric pushrod substantially increased, to improve the service life of electric pushrod.
Description
Technical field
The utility model relates to machinery manufacturing technology fields, more specifically to a kind of electric pushrod.
Background technique
Electric pushrod is a kind of spare and accessory parts of electromechanical, and working principle is that the rotary motion of motor is changed into push rod
Straight reciprocating motion power-driven gear.Existing electric pushrod is mainly by groups such as motor, speed reducer, push rod and control systems
At.It can bear high load, have the high and with long service life electric pushrod of precision is more and more to be used in industry, medical treatment, household
Etc. industries.
The shortcomings that existing electric pushrod is that bearing capacity is not strong, easily damage mechanism, influences service life.And it is existing electronic
The stroke adjustment of push rod realizes by travel switch and microcomputer network and automatically controls that travel switch is easily affected by environment, can not
It is precisely controlled the position of electric pushrod.
Therefore, how to solve the problems, such as that electric pushrod bearing capacity is not strong and easy to damage, be current those skilled in the art
Urgent problem to be solved.
Utility model content
In view of this, holding for electric pushrod can be dramatically increased the purpose of the utility model is to provide a kind of electric pushrod
Power is carried, to protect motor not damaged.
To achieve the goals above, the utility model provides the following technical solutions:
A kind of electric pushrod, including motor, the speed reducer that is connected to the motor, the output end for being connected to the speed reducer
Shaft, the connecting rod that is connected in the shaft, the motor is for driving the shaft rotation to drive the connecting rod reciprocal
Linear motion further includes the mounting blocks being cooperatively connected using thrust bearing and the shaft, the mounting blocks and the speed reducer
It is fixedly connected.
Preferably, the shaft and the connecting rod are cooperatively connected using screw thread pair.
Preferably, the mounting blocks are cylindrical sleeves, and the through-hole of the cylindrical sleeves is equipped with for installing the thrust
The positioning table terrace of bearing, the shaft are equipped with the positioning shaft shoulder for installing the thrust bearing.
Preferably, the thrust bearing is double-direction thrust ball bearing, and the double-direction thrust ball bearing includes inner ring, outside first
Circle and the second outer ring, first outer ring are pressed in the positioning table terrace, and the inner ring is pressed in the positioning shaft shoulder, also wraps
The pressing plate for being set in the shaft and being fixedly connected on the cylindrical sleeves outer end face is included, second outer ring is pressed in described
Pressing plate.
Preferably, the pressing plate is fixedly connected using bolt with washer with the cylindrical sleeves.
Preferably, the pressing plate is equipped with the protective case for preventing dust from entering the thrust bearing, the protection
The pressing plate is sheathed between the shaft.
Preferably, the outer wall of the speed reducer is equipped with flange, and the mounting blocks and the flange use bolt and washer
It is fixedly connected.
It preferably, further include for detecting the rotation angle of the shaft, being sent to remote microcomputer will test information
Angular transducer, the body portion of the angular transducer are fixedly connected on the speed reducer, and the detector of the angular transducer connects
It is connected on end face of the shaft far from the connecting rod, the detector is used to rotate with the shaft.
Preferably, the shaft is equipped with interior hexagonal counterbore on the end face far from the connecting rod, and the detector is equipped with
Outer-hexagonal head for being inserted into the interior hexagonal counterbore and with the interior hexagonal counterbore cooperation.
Preferably, the roller end is equipped with the threaded hole for mounting screw, and the interior hexagonal counterbore is set to described
On the nut of screw.
Electric pushrod provided by the utility model including motor, the speed reducer that is connected to motor, is connected to the defeated of speed reducer
The shaft of outlet, the connecting rod being connected in shaft, motor are rotated to drive connecting rod linear reciprocating motion for drive shaft, are also wrapped
The mounting blocks being cooperatively connected using thrust bearing and shaft are included, mounting blocks are fixedly connected with speed reducer.Since shaft passes through thrust
Bearing and mounting blocks are cooperatively connected, and therefore, when the band dynamic load of shaft drive link does linear reciprocating motion by axial force, turn
The axial compressive force being subject to will be transferred on mounting blocks by axis by thrust bearing, the output without being transferred directly to speed reducer
End, can avoid speed reducer and motor and has been damaged by excessive pressure, substantially increased the bearing capacity of electric pushrod, thus
Improve the service life of electric pushrod.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 provides the structural schematic diagram of electric pushrod specific embodiment by the utility model；
Fig. 2 provides the partial schematic diagram of electric pushrod specific embodiment by the utility model；
Fig. 3 provides the motor and speed reducer schematic diagram of electric pushrod specific embodiment by the utility model；
Fig. 4 is provided the schematic diagram of the angular transducer of electric pushrod specific embodiment by the utility model.
Wherein, 1- motor, 2- speed reducer, 3- flange, 4- mounting blocks, 5- pin hole, 6- pressing plate, 7- seal cover board, 8- spiral
Steel band type protective case, 9- shaft, 10- lubricating cup, 11- connecting rod, 12- angular transducer, 13- detector, 14- screw, 15- positioning table
Terrace, 16- nut, 17- positioning ring, 18- double-direction thrust ball bearing, 19- positioning shaft shoulder, 20- keyway.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
The core of the utility model is to provide a kind of electric pushrod, can dramatically increase the bearing capacity of electric pushrod, to protect
It is not damaged to protect motor.
Please refer to figs. 1 to 4, and Fig. 1 provides the structural schematic diagram of electric pushrod specific embodiment by the utility model；Figure
2 provide the partial schematic diagram of electric pushrod specific embodiment by the utility model；Fig. 3 provides electronic push away by the utility model
The motor and schematic diagram of reducer of bar specific embodiment；Fig. 4 provides the angle of electric pushrod specific embodiment by the utility model
Spend the schematic diagram of sensor.
Electric pushrod provided by the utility model including motor 1, the speed reducer 2 that is connected to motor 1, is connected to deceleration
The shaft 9 of the output end of machine 2, the connecting rod 11 being connected in shaft 9, motor 1 are rotated for drive shaft 9 to drive connecting rod 11 past
Linear motion further includes the mounting blocks 4 being cooperatively connected using thrust bearing and shaft 9, and mounting blocks 4 and speed reducer 2, which are fixed, to be connected
It connects.
Wherein, motor 1 is power part, is rotated for drive shaft 9 with output torque, speed reducer 2 is for reducing motor 1
Output revolving speed, to improve the output torque of shaft 9, shaft 9 is connect with connecting rod 11, and shaft 9 is for driving connecting rod 11 to do back and forth
The rotary motion of shaft 9 is changed into the straight reciprocating motion of connecting rod 11 by linear motion, and connecting rod 11 is used for band dynamic load, from
And load can be driven to do linear reciprocating motion.
Mounting blocks 4 and shaft 9 are cooperatively connected by thrust bearing, and mounting blocks 4 are fixedly mounted on speed reducer 2 simultaneously,
When connecting rod 11 does linear reciprocating motion by axial compressive force with dynamic load, since shaft 9 is matched by thrust bearing with mounting blocks 4
Connection is closed, therefore, the axial compressive force that shaft 9 is subject to will be transferred on mounting blocks 4 by thrust bearing, without directly transmitting
To the output end of speed reducer 2, damaged with motor 1 by excessive pressure to can avoid speed reducer 2, shaft 9 and speed reducer 2
It can be cooperatively connected by the keyway 20 being arranged in shaft 9 and the flat key being mounted on keyway 20.
To guarantee thrust bearing, shaft 9 and the smooth rotation of connecting rod 11, can also be arranged on mounting blocks 4 for being added
The oil filler point of lubricating oil, and the lubricating cup 10 for lubricating oil to be added is set at the cooperation of shaft 9 and connecting rod 11.
Electric pushrod provided by the utility model including motor 1, the speed reducer 2 that is connected to motor 1, is connected to speed reducer 2
The shaft 9 of output end, the connecting rod 11 being connected in shaft 9, motor 1 are rotated for drive shaft 9 to drive connecting rod 11 reciprocal straight
Line movement, further includes the mounting blocks 4 being cooperatively connected using thrust bearing and shaft 9, and mounting blocks 4 are fixedly connected with speed reducer 2.By
It is cooperatively connected in shaft 9 by thrust bearing and mounting blocks 4, therefore, when 9 drive link 11 of shaft does reciprocating linear with dynamic load
When movement is by axial force, the axial compressive force being subject to will be transferred on mounting blocks 4 by shaft 9 by thrust bearing, without
It is transferred directly to the output end of speed reducer 2, speed reducer 2 is can avoid and is damaged with motor 1 by excessive pressure, thus significantly electric
The bearing capacity of dynamic push rod, while improving the service life of electric pushrod.
On the basis of above-described embodiment, it is contemplated that the connection type between shaft 9 and connecting rod 11, since shaft 9 exists
It only makes rotating motion under the driving of motor 1, and shaft 9 needs drive link 11 to do linear reciprocating motion, therefore, it is necessary to by shaft
9 rotary motion is changed into the straight reciprocating motion of connecting rod 11, it is preferred that and shaft 9 and connecting rod 11 are cooperatively connected using screw thread pair,
External screw thread can be set in shaft 9, correspondingly, threaded hole is arranged on connecting rod 11, on the threaded hole on connecting rod 11 and shaft 9
External screw thread is cooperatively connected, when connecting rod 11 is connected to load, 1 drive shaft 9 of motor rotation, due to connecting rod 11 and load connection
It can not rotate, therefore, in the course of rotation, connecting rod 11 can only be rotated by screw thread pair relative to shaft 9 shaft 9, to make
Connecting rod 11 moves along a straight line relative to shaft 9, by the positive and negative rotation of shaft 9, can drive link 11 move forward and backward.Certainly, shaft 9
It can also be connect in other way with connecting rod 11, for example, the modes such as ball-screw.
About in a kind of embodiment of mounting blocks 4, mounting blocks 4 can be cylindrical sleeves, and cylindrical sleeves are equipped with through-hole, will
Cylindrical sleeves are set in shaft 9, and the inner wall of the through-hole of cylindrical sleeves is equipped with the positioning step for installed thrust bearing
Face 15, positioning table terrace 15 should cooperate with the steel ring of thrust bearing, to guarantee that thrust bearing is smoothly installed, correspondingly, shaft 9
On should also be as setting be used for installed thrust bearing positioning shaft shoulder 19.Wherein, positioning table terrace 15 and positioning shaft shoulder 19 is specific
Size, should according to the model of selected thrust bearing and size flexible setting.
About in a kind of embodiment of thrust bearing, it is preferred that thrust bearing is double-direction thrust ball bearing 18, due to connecting rod
11 during moving reciprocatingly, meeting while under tension and thrust, and therefore, shaft 9 also can be simultaneously by biggish pulling force
Double-direction thrust ball bearing 18 therefore can be selected with thrust.
Double-direction thrust ball bearing 18 includes inner ring, the first outer ring and the second outer ring, wherein the first outer ring is pressed in cylindrical sleeve
Positioning table terrace 15 on cylinder, inner ring can be set on the outer wall of shaft 9, and the side of inner ring is pressed in the locating shaft of shaft 9
Shoulder 19, due to shaft 9 by thrust or pulling force during, the positioning shaft shoulder 19 of shaft 9 mainly to inner ring apply pressure, because
This, the two sides of inner ring all should keep relatively fixed with shaft 9, it is preferred that the other side of inner ring can be by being arranged in 9 outer wall of shaft
On positioning ring 17 compress, positioning ring 17 can be compressed by screwing with the round nut 16 in shaft 9, thus can be firm by inner ring
It is pressed on the shaft shoulder of shaft 9, and inner ring is avoided to relatively move with shaft 9.
In view of the mounting means of the second outer ring, can be fixedly connected on the outer end face of cylindrical sleeves one for compress the
The pressing plate 6 of two outer rings, and pressing plate 6 should also be as being set in shaft 9, furthermore, it is contemplated that, the company between pressing plate 6 and cylindrical sleeves
Connect mode, it is preferred that pressing plate 6 is connected and fixed using bolt with washer with cylindrical sleeves.
On the basis of above-described embodiment, since pressing plate 6 is for being fixed outside the second of double-direction thrust ball bearing 18
Circle, therefore, to guarantee that pressing plate 6 does not influence the normal rotation of shaft 9, between needing to be arranged centainly between pressing plate 6 and shaft 9
Gap influences the normal use of bearing to avoid dust from entering in bearing in gap, can be arranged between shaft 9 in pressing plate 6
For preventing dust from entering the protective case of thrust bearing, and protective case should be arranged on pressing plate 6.
Certainly, can also be dust-proof by way of seal cover board 7 is installed on pressing plate 6, seal cover board 7 can be set in shaft 9
It is upper and be fixedly connected with pressing plate 6, protective case then is set between seal cover board 7 and shaft 9, since seal cover board 7 is opposite
In 6 easy disassembly of pressing plate, so conveniently replaced protective case.
In addition, also setting dust-proof protective case can be used in the shaft 9 for stretching out mounting blocks 4, to play sealing and dustproof work
With, it is preferred that protective case can be telescopic helical steel band formula protective case 8.
On the basis of above-described embodiment, it is contemplated that the connection type of speed reducer 2 and mounting blocks 4, it is preferred that can subtract
One flange 3 is set on the outer wall of fast machine 2, and mounting blocks 4 can be used bolt with flange 3 and be fixedly connected with washer.
On the basis of above-mentioned any embodiment, in order to which the position to connecting rod 11 is measured in real time, shaft 9 is separate
The end face of connecting rod 11 is connected to the detector 13 of angular transducer 12, and detector 13 is used to rotate with shaft 9 to detect connecting rod 11
Position, the body portion of angular transducer 12 is fixedly connected on speed reducer 2, and angular transducer 12 can also pass through screw and washer installation
It is fixed on speed reducer 2,12 signal of angular transducer is connected to remote microcomputer, and the rotation angle of shaft 9 is sent in real time
Remote microcomputer, remote microcomputer are used for the position according to rotation angle real-time detection connecting rod 11.
On the basis of above-described embodiment, shaft 9 is equipped with interior hexagonal counterbore, inspection on the end face far from the connecting rod 11
Gauge head 13 is equipped with the outer-hexagonal head for being inserted into interior hexagonal counterbore and with the cooperation of interior hexagonal counterbore.
In view of the angular transducer 12 for detecting 11 position of connecting rod and the connection type between shaft 9, due to shaft 9
That can generate certain axial displacement by axial load, for avoid angular transducer 12 during shaft 9 is mobile by
Damage, can in the end of shaft 9 is arranged hexagonal counterbore, and on detector 13 setting for being inserted into interior hexagonal counterbore and with interior six
The outer-hexagonal head of angle counterbore cooperation, in this way, shaft 9 can phase in shaft 9 when being generated certain axial displacement by axial load
It is mobile to detector 13 without damaging detector 13, and due to the amount of movement very little of shaft 9, detector 13 without departing from
Shaft 9 ensures that the safety in utilization of angular transducer 12.
On the basis of above-described embodiment, to avoid during installation, due to angular transducer 12 and shaft 9 it
Between distance it is excessive and cause detector 13 that can not be inserted into the interior hexagonal counterbore in shaft 9, can be arranged in 9 end of shaft and use
It is set on the nut of screw 14 in the threaded hole of mounting screw 14, and by interior hexagonal counterbore, thus can be by adjusting screw
14 are screwed into the depth of shaft 9 to adjust the distance between interior hexagonal counterbore and detector 13, so that it is guaranteed that detector 13 and shaft 9
Reliable installation.
For the use function of increasing electric pushrod, pin hole 5 at two can be also set on mounting blocks 4, and pin hole 5 can be with it at two
He is connected at attachment, forms different mechanisms, realizes different functions.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Electric pushrod provided by the utility model is described in detail above.Specific case pair used herein
The principles of the present invention and embodiment are expounded, and the above embodiments are only used to help understand, and this is practical new
The method and its core concept of type.It is practical not departing from it should be pointed out that for those skilled in the art
Under the premise of new principle, several improvements and modifications can be made to this utility model, these improvement and modification also fall into this
In the protection scope of utility model claims.
Claims (10)
1. a kind of electric pushrod, which is characterized in that including motor (1), the speed reducer (2) that is connected to the motor (1), be connected to
The shaft (9) of speed reducer (2) output end, the connecting rod (11) being connected on the shaft (9), the motor (1) is for driving
The shaft (9) rotation is moved to drive the connecting rod (11) linear reciprocating motion, further includes using thrust bearing and the shaft
(9) mounting blocks (4) being cooperatively connected, the mounting blocks (4) are fixedly connected with the speed reducer (2).
2. electric pushrod according to claim 1, which is characterized in that the shaft (9) and the connecting rod (11) use spiral shell
Line pair is cooperatively connected.
3. electric pushrod according to claim 1, which is characterized in that the mounting blocks (4) are cylindrical sleeves, the cylinder
The through-hole of sleeve is equipped with the positioning table terrace (15) for installing the thrust bearing, and the shaft (9) is equipped with for pacifying
Fill the positioning shaft shoulder (19) of the thrust bearing.
4. electric pushrod according to claim 3, which is characterized in that the thrust bearing is double-direction thrust ball bearing
(18), the double-direction thrust ball bearing (18) includes inner ring, the first outer ring and the second outer ring, and first outer ring is pressed in described
Positioning table terrace (15), the inner ring are pressed in the positioning shaft shoulder (19), further include being set on the shaft (9) and fixing
It is connected to the pressing plate (6) of the cylindrical sleeves outer end face, second outer ring is pressed in the pressing plate (6).
5. electric pushrod according to claim 4, which is characterized in that the pressing plate (6) and the cylindrical sleeves use spiral shell
Bolt is fixedly connected with washer.
6. electric pushrod according to claim 5, which is characterized in that the pressing plate (6) be equipped with for prevent dust into
Enter the protective case of the thrust bearing, the protective case is set between the pressing plate (6) and the shaft (9).
7. electric pushrod according to claim 1, which is characterized in that the outer wall of the speed reducer (2) is equipped with flange
(3), the mounting blocks (4) are fixedly connected using bolt with washer with the flange (3).
8. electric pushrod according to any one of claims 1 to 7, which is characterized in that further include for detecting the shaft
(9) rotation angle, will test the angular transducer that information is sent to remote microcomputer, the body portion of the angular transducer is fixed
It is connected to the speed reducer (2), the detector (13) of the angular transducer is connected to the shaft (9) far from the connecting rod
(11) on end face, the detector (13) rotates with the shaft (9).
9. electric pushrod according to claim 8, which is characterized in that the shaft (9) is in separate the connecting rod (11)
End face be equipped with interior hexagonal counterbore, the detector (13) be equipped with for be inserted into the interior hexagonal counterbore and with the interior hexagonal
The outer-hexagonal head of counterbore cooperation.
10. electric pushrod according to claim 9, which is characterized in that shaft (9) end, which is equipped with, is used for mounting screw
(14) threaded hole, the interior hexagonal counterbore are set on the nut of the screw (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920499183.4U CN209516820U (en) | 2019-04-12 | 2019-04-12 | A kind of electric pushrod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920499183.4U CN209516820U (en) | 2019-04-12 | 2019-04-12 | A kind of electric pushrod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209516820U true CN209516820U (en) | 2019-10-18 |
Family
ID=68188987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920499183.4U Active CN209516820U (en) | 2019-04-12 | 2019-04-12 | A kind of electric pushrod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209516820U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111422776A (en) * | 2020-03-06 | 2020-07-17 | 徐州东宏机械制造有限公司 | Connecting rod structure of vertically-arranged electric push rod |
-
2019
- 2019-04-12 CN CN201920499183.4U patent/CN209516820U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111422776A (en) * | 2020-03-06 | 2020-07-17 | 徐州东宏机械制造有限公司 | Connecting rod structure of vertically-arranged electric push rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101733600B (en) | Manual and automatic double-adjustment device | |
| CN107288830B (en) | A kind of energy storage electric cylinder | |
| CN103162962A (en) | Bi-directional loading testing machine of knuckle bearing | |
| CN209516820U (en) | A kind of electric pushrod | |
| CN101882829B (en) | Large-thrust directly connected-type electric cylinder | |
| CN105598732B (en) | A kind of electric linear feed unit and its assembly method | |
| CN210087717U (en) | Telescopic rotary hydraulic cylinder | |
| CN106975964A (en) | A kind of mechanical pushing linear motion device of use screw-nut transmission | |
| CN208133008U (en) | A kind of novel telescopic manipulator | |
| CN206368952U (en) | One kind rotates unit | |
| CN108758291A (en) | A kind of Electric Actuator assembly monitor check equipment | |
| CN210799925U (en) | High-thrust parallel electric cylinder | |
| CN208456943U (en) | Novel servo oil cylinder | |
| CN211501531U (en) | Steel wire transmission device | |
| CN207592959U (en) | A kind of fan type Gear Processing clamping device | |
| CN206422649U (en) | A kind of miniature slide unit of compact conformation | |
| CN206764422U (en) | A kind of mechanical pushing linear motion device being driven using screw-nut | |
| CN201726239U (en) | High thrust direct connection type electric cylinder | |
| CN201751122U (en) | Mechanical arm telescopic device | |
| CN110686057A (en) | High-thrust parallel electric cylinder and control method | |
| CN103335080B (en) | A kind of heavily loaded ball screw pair fittable slackening device | |
| CN219492763U (en) | High-precision pneumatic motor telescopic mechanism with self-locking function | |
| CN201352735Y (en) | High-speed precise electric main shaft with double main shafts | |
| CN221127045U (en) | Electric cylinder with built-in pressure sensor | |
| CN220043166U (en) | Electric cylinder with built-in magnetostriction displacement sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |