CN211453217U - Gear Rockwell hardness detection device for wind power generation - Google Patents
Gear Rockwell hardness detection device for wind power generation Download PDFInfo
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- CN211453217U CN211453217U CN201922361187.9U CN201922361187U CN211453217U CN 211453217 U CN211453217 U CN 211453217U CN 201922361187 U CN201922361187 U CN 201922361187U CN 211453217 U CN211453217 U CN 211453217U
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- gear
- positioning seat
- positioning
- sliding
- racks
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- 238000010248 power generation Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 title claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 9
- 238000007542 hardness measurement Methods 0.000 abstract description 2
- 238000010030 laminating Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007550 Rockwell hardness test Methods 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model relates to a Rockwell hardness testing device of a gear for wind power generation, which comprises an object stage arranged on a machine body, wherein a positioning seat is arranged on the object stage, two sliding grooves are respectively arranged on the two sides of the positioning seat along the length direction, a rack is respectively connected in the two sliding grooves in a sliding way, a driving gear is rotatably connected between the two sliding grooves, the two racks are all meshed with the driving gear, and a driving rod extending out of the positioning seat is fixedly connected on the driving gear; a tension spring is arranged between the racks and the bottom of the sliding groove, and one sides of the two racks extending out of the positioning seat are respectively provided with a propping plate; the gear is placed one side that the positioning seat deviates from the objective table, two the inner wall of supporting the tight board all with the gear laminating. The utility model discloses have the effect of clamping gear, can reduce the condition that the gear dropped from the objective table and take place to the operator tests the hardness of gear.
Description
Technical Field
The utility model belongs to the technical field of metal hardness test equipment technique and specifically relates to a gear rockwell hardness detection device for wind power generation is related to.
Background
The rockwell hardness tester is designed according to the rockwell hardness test principle, and can test the hardness of metal only by contacting a test sample on one side.
Chinese patent with publication number CN207439844U discloses a full-automatic rockwell hardness tester control system, including organism and hardness detecting system, the middle part of organism is seted up flutedly, the fixed head is installed at the top of recess, the pressure head is installed to the bottom of fixed head, the circular slot has been seted up to the central authorities of pressure head bottom, install the hardness detector in the circular slot, strain gauge sensor is all installed to the both sides of pressure head bottom, and strain gauge sensor is located the left and right sides of hardness detector respectively, the fixing base is installed to the bottom of recess, the screw thread post is installed at the top of fixing base.
The above prior art solutions have the following drawbacks: above-mentioned scheme can also be used for the test of gear hardness for wind power generation, when testing the gear, directly places the gear on the objective table, can't fix the gear, and the objective table causes the gear to place the shakiness easily at the in-process that goes up and down this moment to lead to the gear to drop from the objective table easily.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, one of the purposes of the utility model is to provide a gear rockwell hardness detection device for wind power generation, it has the effect of pressing from both sides tight gear, can reduce the condition emergence that the gear dropped from the objective table to the operator tests the hardness of gear.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a Rockwell hardness detection device for a gear for wind power generation comprises an object stage arranged on a machine body, wherein a positioning seat is arranged on the object stage, two sliding grooves are respectively formed in two sides of the positioning seat along the length direction, a rack is connected in each of the two sliding grooves in a sliding manner, a driving gear is rotatably connected between the two sliding grooves, the two racks are meshed with the driving gear, and a driving rod extending out of the positioning seat is fixedly connected to the driving gear; a tension spring is arranged between the racks and the bottom of the sliding groove, and one sides of the two racks extending out of the positioning seat are respectively provided with a propping plate; the gear is placed one side that the positioning seat deviates from the objective table, two the inner wall of supporting the tight board all with the gear laminating.
Through adopting above-mentioned technical scheme, the operator rotates the actuating lever, the actuating lever drives drive gear and rotates, drive two racks of drive gear drive extend to the one side that deviates from mutually, make two distance expansions of supporting between the tight board, the extension spring receives the pulling force of rack to be elongated simultaneously, the operator places the gear on the positioning seat, the operator loosens the actuating lever this moment, the extension spring is under the effect of shrink force, two racks of extension spring pulling move simultaneously, make two support the tight board and be close to each other, until two support the tight board and support tightly on the gear, thereby support the tight board and played the tight fixed effect of clamp to the gear, and then reduce the condition that the gear dropped from the objective table and take place, so that the operator tests the hardness of gear.
The present invention may be further configured in a preferred embodiment as: the sliding groove is connected with a plurality of rollers in a rotating mode along the length direction on one side, away from each other, of the two racks, and the rollers are abutted to the racks.
Through adopting above-mentioned technical scheme, the rack is at the in-process that removes, and rack and gyro wheel produce the friction and drive the gyro wheel and rotate, and the pivoted gyro wheel can convert the sliding friction between rack and the groove that slides into rolling friction to the gyro wheel has reduced the frictional force between rack and the groove that slides, and then the smoothness degree when increasing the rack and sliding.
The present invention may be further configured in a preferred embodiment as: the sliding groove is provided with a guide groove along the length direction, and the rack is provided with a guide block matched with the sliding groove.
Through adopting above-mentioned technical scheme, the rack is at the in-process that removes, and the rack drives the guide block and slides along the length direction in groove that slides, and the guide way has restricted the moving direction of guide block this moment to the cooperation of guide way and guide block has played the effect of direction to the rack, and then has reduced the possibility that the rack takes place the skew.
The present invention may be further configured in a preferred embodiment as: the side of the drive rod, which extends out of the positioning seat, is provided with a connecting plate, a positioning rod is arranged on the connecting plate in a penetrating manner, the positioning seat is provided with positioning holes matched with the positioning rod, and the positioning holes are provided with a plurality of positioning holes along the peripheral direction of the drive rod.
Through adopting above-mentioned technical scheme, after supporting tight board clamping gear, the operator removes the locating lever for the locating lever cooperatees with the locating hole, and the locating hole can carry on spacingly to the moving direction of locating lever, and the rotation of actuating lever circumferencial direction can be restricted in the cooperation of locating lever and locating hole simultaneously, thereby locating lever and locating hole have played fixed effect to the actuating lever, and then reduce the actuating lever and appear pivoted possibility.
The present invention may be further configured in a preferred embodiment as: the positioning rod is provided with a positioning seat, and the positioning seat is provided with a positioning hole.
Through adopting above-mentioned technical scheme, conical tip can reduce the area of contact of locating lever and positioning seat, can increase the density between the locating hole simultaneously, and then the operator of being convenient for is more accurate fixes a position the actuating lever to support the more firm tight gear of clamp of board.
The present invention may be further configured in a preferred embodiment as: the positioning rod is provided with a stop block between the connecting plate and the positioning seat, and a spring is sleeved on the positioning rod between the stop block and the connecting plate.
Through adopting above-mentioned technical scheme, when the locating lever matches with the locating slot, the dog extrudees the spring, and the spring has elastic restoring force under the compression to the spring promotes the baffle and drives the locating lever and supports tightly in the locating hole under the effect of elastic restoring force, thereby the spring has played the impetus to the locating lever, and then reduces the condition emergence that the locating lever breaks away from in the locating hole.
The present invention may be further configured in a preferred embodiment as: one side of each of the two abutting plates opposite to each other is provided with a rubber pad.
Through adopting above-mentioned technical scheme, the rubber pad is made by the rubber material, and rubber self is softer has elasticity, and produces deformation easily, when supporting tight board and being close to the gear, the rubber pad can fill up the gap between tight board and the gear to be convenient for support tight board and press from both sides tightly the gear, and then increase the stability of gear.
The present invention may be further configured in a preferred embodiment as: a sliding seat is arranged between the object stage and the positioning seat, a first sliding groove is formed in one side, away from the object stage, of the sliding seat along the width direction of the positioning seat, a first sliding block matched with the first sliding groove is arranged on the positioning seat, and a first lead screw in threaded connection with the first sliding block is rotatably connected to the sliding seat along the length direction of the first sliding groove; the object stage is provided with a second sliding groove along the length direction of the positioning seat, a second sliding block matched with the second sliding groove is arranged on the sliding seat, and a second lead screw in threaded connection with the second sliding block is rotatably connected to the object stage along the length direction of the second sliding groove.
Through adopting above-mentioned technical scheme, when the operator rotated first lead screw, the first slider of first lead screw drive slided along the length direction of first spout, first slider drives the positioning seat and removes, thereby first lead screw can drive the positioning seat and carry out longitudinal movement, the operator rotates the second lead screw simultaneously, the length direction of second spout is followed to second lead screw drive second slider and is removed, the second slider drives the slide and removes, thereby the second lead screw can drive the positioning seat and carry out lateral shifting, the mesh of diversified regulation positioning seat has been realized, and then the operator of being convenient for tests the hardness of the different positions of gear, with the accuracy that improves test data.
To sum up, the utility model discloses a following at least one useful technological effect:
1. the abutting plate plays a role in clamping and fixing the gear, so that the gear can be prevented from falling off the objective table, and an operator can test the hardness of the gear conveniently;
2. the positioning rod and the positioning hole have a fixing effect on the driving rod, so that the possibility of rotation of the driving rod can be reduced;
3. the purpose of adjusting the positioning seat in multiple directions is achieved through the first screw rod and the second screw rod, an operator can conveniently test the hardness of the gear at different positions, and therefore the accuracy of test data is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present embodiment.
Fig. 2 is a schematic structural diagram for embodying the positioning seat in this embodiment.
Fig. 3 is an enlarged schematic view of a portion a in fig. 1.
Fig. 4 is an enlarged schematic view of a portion B in fig. 1.
In the figure, 1, a machine body; 11. an object stage; 12. a cylinder; 13. a loading plate; 14. a pressure head; 2. positioning seats; 21. a sliding groove; 211. a guide groove; 212. a guide block; 22. a rack; 23. a drive gear; 24. a drive rod; 241. a first knob; 25. a tension spring; 26. a propping plate; 27. a roller; 28. a groove; 29. a rubber pad; 3. a connecting plate; 31. positioning a rod; 32. positioning holes; 33. a stopper; 34. a spring; 4. a slide base; 41. a first chute; 42. a first slider; 43. a first lead screw; 44. a second chute; 46. a second slider; 47. a second lead screw; 48. a second knob; 5. a gear.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a gear rockwell hardness detection device for wind power generation, including organism 1, the bottom of organism 1 is equipped with cylinder 12, and the tip of cylinder 12 piston rod is equipped with carries thing board 13, and one side that organism 1 kept away from cylinder 12 is equipped with pressure head 14, and the axle center of pressure head 14 is on same axis with the center of carrying thing board 13.
Referring to fig. 1 and 2, one side of carrying board 13 deviating from cylinder 12 is equipped with objective table 11, and objective table 11 is equipped with positioning seat 2 in the one side that deviates from carrying board 13, and positioning seat 2 is along the equal one sliding groove 21 in length direction's both ends, and two sliding grooves 21 are located the upper portion and the lower part of positioning seat 2 respectively, and the opening of two sliding grooves 21 deviates from mutually. All sliding connection has a rack 22 in two sliding groove 21, and two racks 22 extend two sliding groove 21 respectively and all are connected with one through the connecting rod and support tight board 26, and the cross-section of supporting tight board 26 is the arc. The middle part of positioning seat 2 is seted up with the communicating recess 28 in two grooves 21 that slide, is equipped with drive gear 23 in the recess 28, and two racks 22 all mesh with drive gear 23 mutually, and drive gear 23 rotates through actuating lever 24 and connects on positioning seat 2, and drive gear 23 and actuating lever 24 fixed connection, is equipped with the first knob 241 of the operator pivoted of being convenient for on the actuating lever 24.
Referring to fig. 1 and 2, a tension spring 25 is disposed between the rack 22 and the bottom of the sliding slot 21, when an operator rotates the driving lever 24 through the first knob 241, the driving lever 24 drives the driving gear 23 to rotate, the driving gear 23 drives the two racks 22 to move toward the opposite side, so that the distance between the two tightening plates 26 is expanded, and the tension spring 25 is lengthened by the racks 22. At this moment, the operator places the tested gear 5 on the positioning seat 2, then the operator loosens the first knob 241, the tension spring 25 resets to generate a contraction force, the rack 22 is pulled to move, the two abutting plates 26 are close to each other until the two abutting plates 26 abut against the gear 5, and the abutting plates 26 clamp and fix the gear 5, so that the situation that the gear 5 falls off from the objective table 11 is reduced, and the hardness of the gear 5 is tested by the operator.
Referring to fig. 2 and 3, the driving rod 24 is provided with a connecting plate 3 between the first knob 241 and the positioning seat 2, the positioning rod 31 penetrates through the connecting plate 3, the positioning seat 2 is provided with a positioning hole 32 matched with the positioning rod 31, the end portions of the positioning hole 32 and the positioning rod 31 are conical, and the positioning hole 32 is provided with a plurality of positioning holes along the circumferential direction of the driving rod 24. A stop 33 is fixedly connected to the positioning rod 31 between the connecting plate 3 and the positioning seat 2, a spring 34 is sleeved between the stop 33 and the connecting plate 3 of the positioning rod 31, and when the positioning rod 31 is matched with the positioning hole 32, the spring 34 is in a partially compressed state. Meanwhile, one side of each of the two abutting plates 26 opposite to each other is provided with a rubber pad 29, and the rubber pads 29 are made of rubber materials, so that the rubber is soft and elastic and is easy to deform.
Referring to fig. 2 and 3, when the tightening plate 26 approaches the gear 5, the operator rotates the driving rod 24 to make the tightening plate 26 further tighten the gear 5, and at this time, the rubber pad 29 can fill the gap between the gear 5 and the tightening plate 26, so as to increase the fastening strength between the tightening plate 26 and the gear 5. Meanwhile, the operator fits the positioning rod 31 with the positioning hole 32, and the positioning hole 32 restricts the moving direction of the positioning rod 31, so that the positioning rod 31 restricts the rotation of the driving lever 24 in the circumferential direction. And under the action of the elastic restoring force of the spring 34, the spring 34 pushes the stopper 33, so that the positioning rod 31 abuts against the positioning hole 32, and the situation that the positioning rod 31 is separated from the positioning hole 32 is reduced, and the situation that the abutting plate 26 is loosened due to the rotation of the driving rod 24 is reduced.
Referring to fig. 2, two sliding grooves 21 are provided with a set of rollers 27 on the side where two racks 22 depart from each other, and each set of rollers 27 is connected with a plurality of rollers along the length of sliding groove 21. When the rack 22 moves, the rack 22 drives the roller 27 to rotate through friction, and when the roller 27 rotates, the roller 27 can convert sliding friction between the groove wall of the sliding groove 21 and the rack 22 into rolling friction, so that the roller 27 reduces friction between the rack 22 and the groove wall of the sliding groove 21, and further increases fluency of the rack 22 during moving.
Referring to fig. 2 and 4, a guide groove 211 is formed in each of two side walls of the sliding groove 21 in the length direction, two guide blocks 212 respectively matched with the two guide grooves 211 are arranged on the rack 22, when the rack 22 moves, the guide blocks 212 slide along the length direction of the guide grooves 211 along with the rack 22, and the guide grooves 211 limit the moving direction of the guide blocks 212, so that the guide blocks 212 and the guide grooves 211 guide and limit the rack 22, and further, the stability of the rack 22 during moving is improved, and the situation that the rack 22 is separated from the driving gear 23 is reduced.
Referring to fig. 1 and 2, sliding connection has a slide 4 between objective table 11 and positioning seat 2, slide 4 has seted up first spout 41 along the length direction of positioning seat 2 in the one side that deviates from objective table 11, sliding connection has first slider 42 in the first spout 41, first slider 42 fixed connection is on positioning seat 2, the swivelling joint has the first lead screw 43 with first slider 42 threaded connection in the first spout 41, and slide 4 is extended to the one end of first lead screw 43 along length direction. Meanwhile, a second sliding groove 44 is formed in one side, away from the object carrying plate 13, of the object carrying platform 11 along the length direction of the positioning seat 2, a second sliding block 46 is connected to the second sliding groove 44 in a sliding mode, the second sliding block 46 is fixedly connected with the sliding seat 4, a second lead screw 47 in threaded connection with the second sliding block 46 is connected to the second sliding groove 44 in a rotating mode, the object carrying platform 11 extends out of one end of the second lead screw 47 along the length direction, and a second knob 48 is arranged on each of the first lead screw 43 and the second lead screw 47.
Referring to fig. 1 and 2, an operator rotates the first lead screw 43 through the second knob 48, the first lead screw 43 drives the first slider 42 to drive the positioning seat 2 to move, and the positioning seat 2 slides along the length direction of the first sliding groove 41, so that the first lead screw 43 drives the positioning seat 2 to move longitudinally. Meanwhile, an operator rotates the second screw rod 47, the second screw rod 47 drives the second sliding block 46 to move along the length direction of the second sliding groove 44, so that the second screw rod 47 drives the positioning seat 2 to move transversely, the first screw rod 43 and the second screw rod 47 achieve the purpose of adjusting the positioning seat 2 in multiple directions, and the pressure head 14 is convenient to perform hardness testing on different positions of the gear 5, so that the accuracy of testing data is improved.
The implementation principle of the embodiment is as follows: an operator rotates the first knob 241, the first knob 241 rotates the driving gear 23 through the driving rod 24, the driving gear 23 drives the two racks 22 to move towards the opposite side, so that the distance between the two abutting plates 26 is enlarged, then the operator places the gear 5 to be tested on the positioning seat 2, the operator loosens the first knob 241, the tension spring 25 pulls the racks 22, the two racks 22 approach to each other, the two abutting plates 26 clamp the gear 5 tightly, at the moment, the operator starts the cylinder 12, the cylinder 12 drives the objective table 11 to approach the pressure head 14, hardness detection is performed on the gear 5, then the operator drives the cylinder 12 to contract, the operator rotates the first screw rod 43 to longitudinally move the positioning seat 2, then rotates the second screw rod 47 to transversely move the positioning seat 2, and multi-point test is performed on the gear 5.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a gear rockwell hardness detection device for wind power generation, includes objective table (11) of setting on organism (1), its characterized in that: the positioning seat (2) is arranged on the objective table (11), two sliding grooves (21) are respectively formed in two sides of the positioning seat (2) along the length direction, a rack (22) is connected to each of the two sliding grooves (21) in a sliding manner, a driving gear (23) is rotatably connected between the two sliding grooves (21), the two racks (22) are meshed with the driving gear (23), and a driving rod (24) extending out of the positioning seat (2) is fixedly connected to the driving gear (23);
a tension spring (25) is arranged between the racks (22) and the bottom of the sliding groove (21), and one sides of the two racks (22) extending out of the positioning seat (2) are respectively provided with a pressing plate (26);
the gear (5) is placed on one side, deviating from the objective table (11), of the positioning seat (2), and the inner walls of the two abutting plates (26) are attached to the gear (5).
2. The device for detecting Rockwell hardness of a Gear for wind turbine according to claim 1, wherein: the sliding groove (21) is connected with a plurality of idler wheels (27) on one side of the two racks (22) which are deviated from each other in a rotating mode along the length direction, and the idler wheels (27) are abutted to the racks (22).
3. The device for detecting Rockwell hardness of a Gear for wind turbine according to claim 2, wherein: guide grooves (211) are formed in the sliding grooves (21) along the length direction, and guide blocks (212) matched with the sliding grooves (21) are arranged on the racks (22).
4. The device for detecting Rockwell hardness of a Gear for wind turbine according to claim 1, wherein: one side of the driving rod (24) extending out of the positioning seat (2) is provided with a connecting plate (3), the connecting plate (3) is provided with a positioning rod (31) in a penetrating mode, the positioning seat (2) is provided with positioning holes (32) matched with the positioning rod (31), and the positioning holes (32) are provided with a plurality of positioning holes along the peripheral direction of the driving rod (24).
5. The device for detecting Rockwell hardness of a Gear for wind turbine according to claim 4, wherein: the cross sections of one end of the positioning rod (31) close to the positioning seat (2) and the positioning hole (32) are conical.
6. The device for detecting Rockwell hardness of a Gear for wind Power Generation according to claim 5, wherein: a stop block (33) is arranged between the connecting plate (3) and the positioning seat (2) of the positioning rod (31), and a spring (34) is sleeved on the positioning rod (31) between the stop block (33) and the connecting plate (3).
7. The device for detecting Rockwell hardness of a Gear for wind turbine according to claim 1, wherein: one side of each of the two abutting plates (26) opposite to each other is provided with a rubber pad (29).
8. The device for detecting Rockwell hardness of a Gear for wind turbine according to claim 1, wherein: a sliding seat (4) is arranged between the objective table (11) and the positioning seat (2), a first sliding groove (41) is formed in one side, away from the objective table (11), of the sliding seat (4) along the width direction of the positioning seat (2), a first sliding block (42) matched with the first sliding groove (41) is arranged on the positioning seat (2), and a first screw rod (43) in threaded connection with the first sliding block (42) is rotatably connected to the sliding seat (4) along the length direction of the first sliding groove (41);
second spout (44) have been seted up along the length direction of positioning seat (2) in objective table (11), be equipped with on slide (4) with second spout (44) matched with second slider (46), objective table (11) are connected with second lead screw (47) with second slider (46) threaded connection along the length direction rotation of second spout (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922361187.9U CN211453217U (en) | 2019-12-24 | 2019-12-24 | Gear Rockwell hardness detection device for wind power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922361187.9U CN211453217U (en) | 2019-12-24 | 2019-12-24 | Gear Rockwell hardness detection device for wind power generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211453217U true CN211453217U (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922361187.9U Expired - Fee Related CN211453217U (en) | 2019-12-24 | 2019-12-24 | Gear Rockwell hardness detection device for wind power generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211453217U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112301212A (en) * | 2020-09-30 | 2021-02-02 | 广西玉柴机器股份有限公司 | Method for detecting minimum tempering temperature after gear ring quenching |
| CN113878513A (en) * | 2021-09-29 | 2022-01-04 | 伯朗特机器人股份有限公司 | Upper clamping assembly for gear meshing test and clamping device thereof |
-
2019
- 2019-12-24 CN CN201922361187.9U patent/CN211453217U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112301212A (en) * | 2020-09-30 | 2021-02-02 | 广西玉柴机器股份有限公司 | Method for detecting minimum tempering temperature after gear ring quenching |
| CN113878513A (en) * | 2021-09-29 | 2022-01-04 | 伯朗特机器人股份有限公司 | Upper clamping assembly for gear meshing test and clamping device thereof |
| CN113878513B (en) * | 2021-09-29 | 2023-03-10 | 伯朗特机器人股份有限公司 | Upper clamping assembly for gear meshing test and clamping device thereof |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200908 |