CN212677043U - Traction motor dismounting device - Google Patents
Traction motor dismounting device Download PDFInfo
- Publication number
- CN212677043U CN212677043U CN202021699562.7U CN202021699562U CN212677043U CN 212677043 U CN212677043 U CN 212677043U CN 202021699562 U CN202021699562 U CN 202021699562U CN 212677043 U CN212677043 U CN 212677043U
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- plate
- sleeving
- shaft
- telescopic
- assembled
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Abstract
A traction motor dismounting device comprises a sleeving connection plate, wherein the sleeving connection plate is sleeved on one end, penetrating out of an end cover, of a motor shaft, a shaft sleeve is arranged on the sleeving connection plate, an anti-skidding sleeve is sleeved outside the shaft sleeve, and the anti-skidding sleeve is assembled with the outer wall of the shaft sleeve in a screwing mode through threads; the two sides of the sleeving and connecting plate are respectively provided with a sleeving and connecting shaft plate, the sleeving and connecting shaft plate is fixedly assembled with one end of a sleeving and connecting middle rotating shaft, belt wheels are sleeved on the sleeving and connecting middle rotating shaft in a circumferentially rotatable manner, a synchronous belt respectively bypasses the two belt wheels and the two rotating cylinders to form a belt transmission mechanism, the rotating cylinders are assembled with the two rotating retaining rings, the two rotating retaining rings are respectively fixed at the two ends of the retaining connecting block, and the retaining connecting block is fixed on the sleeving and connecting plate; the inner part of the rotary cylinder is a hollow rotary inner cylinder, and the rotary inner cylinder is clamped with one end of the ejection bolt, can axially slide and cannot be circumferentially and rotatably assembled; the other end of the ejection bolt penetrates through the sleeving and connecting plate and the fabrication hole and then is tightly attached to the end face of the stator, and the ejection bolt is assembled with the sleeving and connecting plate and the fabrication hole in a screwing mode through threads.
Description
Technical Field
The utility model relates to a subway traction motor's dismouting technique especially relates to a traction motor dismouting device.
Background
Referring to fig. 1, a traction motor for traction of a steel wheel of a subway mainly includes the following structure: the motor comprises a stator 110 and a rotor 140, wherein a motor shaft 130 is mounted on the rotor 140, one end of the motor shaft 130 penetrates through the stator 110 and can be assembled with the stator 110 in a circumferential rotating mode, the rotor 140 is mounted in the stator 110, the stator 110 drives the rotor 140 to rotate in the circumferential mode, the other end of the motor shaft 130 can be assembled with an end cover 120 in the circumferential rotating mode, the end cover 120 is mounted on the stator 110 through 4 bolts 150, and the end cover 120 is provided with a process hole 121. When the traction motor is overhauled, the rotor 140 needs to be pulled out of the stator 110, and the specific steps are as follows:
1. first, two bolts 150 are removed and then supported by a tool on the end of the motor shaft 130 that extends through the end cap 120;
2. removing the two residual bolts 150, then enabling the ejector bolts to pass through the fabrication holes 121 to enable the end faces of the ejector bolts to be attached to the end faces of the stator 110, and screwing the ejector bolts and the fabrication holes 121 together through threads; the ejector bolts are rotated and extended toward the stator 110, so that the end cover 120 and the rotor 140 are partially ejected from the stator, and then the rotor is completely pulled out of the stator by a tool. The whole process ensures that the rotor cannot greatly shake due to the need of the medicine, and the rotor is prevented from colliding with the stator.
3. And (5) placing the disassembled rotor on a transfer trolley for transferring and storing.
The whole disassembly process needs at least two workers to operate, and the efficiency is very low. And the rotating shaft is required to be placed on the transfer trolley after being dismantled, so that steps are increased, and the efficiency is also influenced. To this inventor design a traction motor dismouting device, it can carry out quick assembly disassembly and dismantle the rotor and need not to place again on the transfer car (buggy) after the rotor.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defects in the prior art, the technical problem to be solved in the present invention is to provide a dismounting device for a traction motor.
In order to achieve the purpose, the utility model provides a traction motor dismounting device, which comprises a sleeve joint plate, wherein the sleeve joint plate is sleeved on one end of a motor shaft penetrating out of an end cover, a shaft sleeve is arranged on the sleeve joint plate, an anti-skid sleeve is sleeved outside the shaft sleeve, and the anti-skid sleeve is screwed and assembled with the outer wall of the shaft sleeve through threads;
the two sides of the sleeving and connecting plate are respectively provided with a sleeving and connecting shaft plate, the sleeving and connecting shaft plate and one end of a sleeving and connecting middle rotating shaft are fixedly assembled, belt wheels are sleeved on the sleeving and connecting middle rotating shaft in a circumferential rotating mode, a synchronous belt respectively bypasses the two belt wheels and the two rotating cylinders to form a belt transmission mechanism, the rotating cylinders and the two rotating retaining rings can be assembled in a circumferential rotating mode and cannot move axially, the two rotating retaining rings are respectively fixed at the two ends of a retaining connecting block, and the retaining connecting block is fixed on the sleeving and connecting plate;
the inner part of the rotary cylinder is a hollow rotary inner cylinder, and the rotary inner cylinder is clamped with one end of the ejection bolt, can axially slide and cannot be circumferentially and rotatably assembled; the other end of the ejection bolt penetrates through the sleeving and connecting plate and the fabrication hole and then is tightly attached to the end face of the stator, and the ejection bolt is assembled with the sleeving and connecting plate and the fabrication hole in a screwing mode through threads.
Preferably, one end of the rotating cylinder, which is far away from the socket plate, penetrates through the rotating retaining ring and then is assembled and fixed with the nut sleeve, and the outline of the outer wall of the nut sleeve is polygonal.
Preferably, the inner wall of the rotating inner cylinder is provided with clamping teeth distributed along the axial direction of the rotating inner cylinder, and the clamping teeth are uniformly distributed along the inner wall of the rotating inner cylinder in the circumferential direction so as to form an inner gear; the internal gear is clamped with the rotary gear, can axially slide and cannot be circumferentially rotatably assembled, and the rotary gear is sleeved and fixed on one end of the ejection bolt.
Preferably, the sheathing plate is fixedly assembled with one end of a first tooling plate, the other end of the first tooling plate is fixedly assembled with one end of a second tooling plate, the other end of the second tooling plate passes through a tooling plate sliding groove on a tooling expansion plate and is clamped with the tooling plate sliding groove and can be assembled in a sliding manner, the top end of the tooling expansion plate penetrates through a top plate and an expansion plate groove and then is fixedly assembled with a handle plate, the expansion plate groove is arranged on an expansion locking block, an expansion locking plate groove communicated with the expansion plate groove is further arranged on the expansion locking block, the expansion locking plate groove is clamped with the expansion locking plate and can be assembled in a sliding manner, an expansion convex strip is arranged on the end face of one end of the expansion locking plate facing the tooling expansion plate, and the expansion convex strip is clamped into an expansion clamping groove; the plurality of telescopic clamping grooves are distributed along the length direction of the tool telescopic plate; the telescopic lock plate is fixedly assembled with one end of the telescopic lock shaft, and the other end of the telescopic lock shaft penetrates through the telescopic lock block and the telescopic shaft plate and then is arranged in the electromagnet.
Preferably, the telescopic raised lines are provided with raised line inclined planes, and the raised line inclined planes are arranged in a manner of inclining upwards from one end close to the tool telescopic plate to the other end.
Preferably, the telescopic lock shaft is sleeved with a telescopic limiting ring at a part between the telescopic lock block and the telescopic shaft plate, and the telescopic lock shaft is sleeved with a telescopic pressure spring at a part between the telescopic limiting ring and the telescopic shaft plate, and the telescopic pressure spring is used for applying elasticity to the telescopic lock shaft to push the telescopic lock plate.
Preferably, flexible locking piece, flexible beam plate all install on the roof, the roof is fixed at the backup pad top, the backup pad bottom assembles with the universal wheel.
Preferably, the part of the second tooling plate, which is located between the first tooling plate and the tooling expansion plate, is fixedly assembled with one end of a bearing belt, the other end of the bearing belt is fixedly connected with a bearing block, the bearing block is fixed on one end of a bearing threaded sleeve, and the other end of the bearing threaded sleeve penetrates through the bearing partition plate and is assembled with the bearing partition plate in a non-circumferential rotation manner and in an axial movement manner; the bearing threaded sleeve is internally provided with a hollow threaded hole, the threaded hole is assembled with one end of a screw rod in a threaded screwing mode, and the other end of the screw rod penetrates through the top plate and then is fixedly connected with an output shaft of the motor through a coupler; the bearing partition plate is fixed on the bearing mounting plate, and the bearing mounting plate is fixed on the top plate; the load bearing belt has flexibility.
The utility model has the advantages that:
the utility model discloses simple structure, convenient to use can drive two ejecting bolt circumferential rotations simultaneously moreover to realize the stable ejecting of pivot, prevent that rotor and stator from colliding. And can keep away from end cover one end with the motor shaft through the bandage after dismantling the rotor and install on roof 220 to the realization just also need not the transfer car (buggy) to the steady support of rotor, directly pass through the utility model discloses transport can.
Drawings
Fig. 1 is a schematic structural view of a traction motor.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic structural diagram of the present invention.
Fig. 4 is a sectional view at the center plane of the axis of the motor shaft.
Fig. 5 is an enlarged view at F1 in fig. 4.
Fig. 6 is a cross-sectional view at another center plane where the axis of the motor shaft is located.
Fig. 7 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1 to 7, the dismounting device for a traction motor in this embodiment includes a socket plate 610, the socket plate 610 is sleeved on one end of the motor shaft 130, which penetrates through the end cover 120, a shaft sleeve 680 is installed on the socket plate 610, an anti-slip sleeve 810 is sleeved outside the shaft sleeve 680, and the anti-slip sleeve 810 is screwed on an outer wall of the shaft sleeve 680 through a thread;
the two sides of the socket plate 610 are respectively provided with a socket shaft plate 611, the socket shaft plate 611 and one end of the socket central rotating shaft 910 are fixedly assembled, the socket central rotating shaft 910 is sleeved with a pulley 821 in a circumferential rotating manner, the synchronous belt 820 respectively bypasses the two pulleys 821 and the two rotating cylinders 830 to form a belt transmission mechanism, the rotating cylinders 830 and the two rotating retaining rings 860 can be assembled in a circumferential rotating manner and can not move in an axial direction, the two rotating retaining rings 860 are respectively fixed at two ends of the retaining connecting block 850, the retaining connecting block 850 is fixed on the socket plate 610, one end of the rotating cylinder 830, which is far away from the socket plate 610, penetrates through the rotating retaining rings 860 and is fixedly assembled with the nut sleeve 832, the outline of the outer wall 832 of the nut sleeve is polygonal, and when in use, a wrench is sleeved on the nut sleeve 832 to drive;
the inside of the rotating cylinder 830 is a hollow rotating inner cylinder 831, the inner wall of the rotating inner cylinder 831 is provided with latch teeth distributed along the axial direction, and the latch teeth are uniformly distributed along the inner wall of the rotating inner cylinder 831 in the circumferential direction to form an internal gear. The internal gear is assembled with the rotating gear 840 in a clamping mode, the rotating gear 840 is fixed to one end of the ejection bolt 920 in a sleeved mode, the other end of the ejection bolt 920 penetrates through the sleeving plate 610 and the process hole 121 and then is attached to the end face of the stator 110, and the ejection bolt 920 is assembled with the sleeving plate 610 and the process hole 121 in a screwing mode through threads. When one of the rotary cylinders 830 rotates circumferentially, the rotary cylinder 830 drives the other rotary cylinder 830 to rotate synchronously through a synchronous belt, so that the ejection bolt 920 is driven to rotate circumferentially through the rotary gear 840, and the ejection bolt 920 can move axially towards the end cover 120 through the screw driver when rotating circumferentially, so that the end cover 120 and the rotor 140 are ejected out of the stator along the axial direction of the motor shaft. And because the rotating gear 840 is in clamping transmission with the clamping teeth, the rotating gear 840 is always in clamping assembly with the rotating cylinder 830 when moving axially once. After the end cover 120 is ejected, the rotor and the end cover can be driven to exit from the stator by moving the sleeving connection plate 610, so that the stator and the rotor are disassembled.
The socket plate 610 is fixed with the assembly of first frock board 620 one end, the first frock board 620 other end is fixed with the assembly of second frock board 630 one end, the second frock board 630 other end passes frock board spout 512 on the frock expansion plate 510 and block, slidable assembly with it, frock expansion plate 510 top is worn out roof 220, expansion plate groove 241 back and is fixed with the assembly of handle board 520, expansion plate groove 241 sets up on flexible locking piece 240, still be provided with the flexible jam plate groove 242 with expansion plate groove 241 intercommunication on the flexible locking piece 240, flexible jam plate groove 242 and flexible jam plate 530 block, slidable assembly, be provided with flexible sand grip 540 on the flexible jam plate 530 towards the one end terminal surface of frock expansion plate 510, flexible sand grip 540 clamps and goes into flexible draw-in groove 511 to relatively fixed frock expansion plate 510 in frock expansion plate 510 length direction. The plurality of telescopic slots 511 are distributed along the length direction of the tool telescopic plate 510, the telescopic convex strips 540 are provided with convex strip inclined planes 541, and the convex strip inclined planes 541 are inclined upwards from one end close to the tool telescopic plate 510 to the other end; this kind of design makes can move down and can not move up when frock expansion plate 510 and the combination of flexible hasp board during the use.
The telescopic lock plate 530 is fixedly assembled with one end of the telescopic lock shaft 550, the other end of the telescopic lock shaft 550 penetrates through the telescopic lock block 240 and the telescopic shaft plate 221 and then is arranged in the electromagnet 410, and the electromagnet 410 can drive the telescopic lock shaft 550 to axially move after being started. The telescopic lock shaft 550 is sleeved with a telescopic limit ring 551 at a part between the telescopic lock block 240 and the telescopic shaft plate 221, the telescopic lock shaft 550 is sleeved with a telescopic pressure spring 560 at a part between the telescopic limit ring 551 and the telescopic shaft plate 221, and the telescopic pressure spring 560 is used for applying elastic force to the telescopic lock shaft 550 to push the telescopic lock plate 530.
The telescopic locking block 240 and the telescopic shaft plate 221 are both mounted on the top plate 220, the top plate 220 is fixed on the top of the supporting plate 210, and the bottom of the supporting plate 210 is assembled with the universal wheel 310. The weight box 230 is further installed on the top plate 220, and the weight box 230 is used for increasing the weight of one end of the top plate 220 far away from the sleeving connection plate 610 so as to prevent the top plate 220 from being turned over by the weight of the rotor when the rotor is taken out.
The part of the second tooling plate 630, which is located between the first tooling plate 620 and the tooling expansion plate 510, is fixedly assembled with one end of a bearing belt 640, the other end of the bearing belt 640 is fixedly connected with a bearing block 650, the bearing block 650 is fixed on one end of a bearing threaded sleeve 660, and the other end of the bearing threaded sleeve 660 passes through the bearing partition plate 251 and is assembled with the bearing partition plate 251 in a non-circumferential rotation manner and in an axial movement manner; the bearing thread insert 660 is internally provided with a hollow threaded hole 661, the threaded hole 661 is assembled with one end of the screw 670 in a threaded screwing mode, the other end of the screw 670 penetrates through the top plate 220 and then is fixedly connected with an output shaft of the motor 420 through a coupler, and the motor 420 can drive the screw 670 to rotate circumferentially after being started. The bearing partition 251 is fixed on the bearing mounting plate 250, and the bearing mounting plate 250 is fixed on the top plate 220; the load bearing belt 640 has flexibility.
The utility model discloses a use as follows:
1. the utility model is covered outside the traction motor, namely the supporting plates 210 are respectively positioned at the two sides of the traction motor;
2. pulling the hitching plate 610, so that the hitching plate 610 and the shaft sleeve 680 are sleeved on the motor shaft 130, and sleeving the anti-slip sleeve 810 on the shaft sleeve 680, so that the hitching plate 610 cannot pass through the motor shaft 130 and exit from the motor shaft 130;
3. when the electromagnet 410 is activated, the electromagnet drives the retractable lock shaft 550 to move in a direction away from the retractable lock plate 530 against the elastic force of the retractable compression spring, so that the retractable protrusion strip 540 exits the retractable slot 511. The tool telescoping plate 510 is pulled up until it cannot be pulled by holding the handle plate 520.
4. The motor 420 is activated and drives the bearing nut 660 up the screw 670 so that the bearing belt 640 is tightened and the rotor is supported.
5. The wrench is sleeved on the nut sleeve 832, the wrench drives the nut sleeve 832 to rotate circumferentially, so that the rotating cylinder 830 rotates circumferentially, the rotating cylinder drives the ejection bolt 920 to rotate circumferentially, and the ejection screw 920 moves towards the end cover to eject the end cover and the rotor part out of the stator. Because the two ends of the second tooling plate 630 are respectively assembled through the first tooling plate 620 and the tooling expansion plate 510 in a rigid manner, and the middle of the second tooling plate is connected and supported through the bearing belt 640, the sleeving plate 610 is not easy to rock, namely, the rotor is not easy to collide with the stator.
6. Promote the utility model discloses to keeping away from the stator direction and removing, the utility model discloses carry the rotor and pull out the stator gradually, then keep away from end cover 120 one end with the motor shaft and fix with the bandage assembly, then fix the bandage on roof 220 and tighten to make the rotor can be supported effectively.
7. Finally, the utility model discloses can remove the rotor, it is very convenient.
The details of the present invention are well known to those skilled in the art.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. The utility model provides a traction motor dismouting device which characterized by: the motor shaft anti-skidding device comprises a sleeving and connecting plate, wherein the sleeving and connecting plate is sleeved on one end, penetrating out of an end cover, of a motor shaft, a shaft sleeve is arranged on the sleeving and connecting plate, an anti-skidding sleeve is sleeved outside the shaft sleeve, and the anti-skidding sleeve is assembled with the outer wall of the shaft sleeve in a screwing mode through threads;
the two sides of the sleeving and connecting plate are respectively provided with a sleeving and connecting shaft plate, the sleeving and connecting shaft plate and one end of a sleeving and connecting middle rotating shaft are fixedly assembled, belt wheels are sleeved on the sleeving and connecting middle rotating shaft in a circumferential rotating mode, a synchronous belt respectively bypasses the two belt wheels and the two rotating cylinders to form a belt transmission mechanism, the rotating cylinders and the two rotating retaining rings can be assembled in a circumferential rotating mode and cannot move axially, the two rotating retaining rings are respectively fixed at the two ends of a retaining connecting block, and the retaining connecting block is fixed on the sleeving and connecting plate;
the inner part of the rotary cylinder is a hollow rotary inner cylinder, and the rotary inner cylinder is clamped with one end of the ejection bolt, can axially slide and cannot be circumferentially and rotatably assembled; the other end of the ejection bolt penetrates through the sleeving and connecting plate and the fabrication hole and then is tightly attached to the end face of the stator, and the ejection bolt is assembled with the sleeving and connecting plate and the fabrication hole in a screwing mode through threads.
2. The dismounting device for the traction motor as claimed in claim 1, wherein: one end of the rotating cylinder, far away from the sleeving plate, penetrates out of the rotating retaining ring and is fixedly assembled with the nut sleeve, and the outline of the outer wall of the nut sleeve is polygonal.
3. The traction motor dismounting device according to claim 1 or 2, characterized in that: the inner wall of the rotary inner cylinder is provided with clamping teeth distributed along the axial direction of the rotary inner cylinder, and the clamping teeth are uniformly distributed along the circumferential direction of the inner wall of the rotary inner cylinder so as to form an inner gear; the internal gear is clamped with the rotary gear, can axially slide and cannot be circumferentially rotatably assembled, and the rotary gear is sleeved and fixed on one end of the ejection bolt.
4. The dismounting device for the traction motor as claimed in claim 1, wherein: the telescopic plate is fixedly assembled with one end of a first tooling plate, the other end of the first tooling plate is fixedly assembled with one end of a second tooling plate, the other end of the second tooling plate penetrates through a tooling plate sliding groove in a tooling expansion plate and is clamped with the tooling plate sliding groove and can be assembled in a sliding mode, the top end of the tooling expansion plate penetrates through a top plate and an expansion plate groove and then is fixedly assembled with a handle plate, the expansion plate groove is formed in an expansion locking block, an expansion locking plate groove communicated with the expansion plate groove is further formed in the expansion locking block, the expansion locking plate groove is clamped with the expansion locking plate and can be assembled in a sliding mode, an expansion convex strip is arranged on the end face, facing the tooling expansion plate, of the expansion locking plate, and the expansion convex strip is clamped into an expansion clamping groove; the plurality of telescopic clamping grooves are distributed along the length direction of the tool telescopic plate; the telescopic lock plate is fixedly assembled with one end of the telescopic lock shaft, and the other end of the telescopic lock shaft penetrates through the telescopic lock block and the telescopic shaft plate and then is arranged in the electromagnet.
5. The traction motor dismounting device according to claim 4, wherein: the tool expansion plate is characterized in that a convex strip inclined plane is arranged on the telescopic convex strip, and the convex strip inclined plane is inclined upwards from one end close to the tool expansion plate to the other end.
6. The traction motor dismounting device according to claim 4, wherein: the telescopic lock is characterized in that a telescopic limiting ring is sleeved on a part, located between the telescopic lock block and the telescopic shaft plate, of the telescopic lock shaft, a telescopic pressure spring is sleeved on a part, located between the telescopic limiting ring and the telescopic shaft plate, of the telescopic lock shaft, and the telescopic pressure spring is used for applying elasticity, pushed to the telescopic lock plate, to the telescopic lock shaft.
7. The traction motor dismounting device according to claim 4, wherein: the telescopic locking block and the telescopic shaft plate are both installed on the top plate, the top plate is fixed to the top of the supporting plate, and the bottom of the supporting plate is assembled with the universal wheel.
8. The traction motor dismounting device according to claim 4, wherein: the part of the second tooling plate, which is positioned between the first tooling plate and the tooling expansion plate, is fixedly assembled with one end of a bearing belt, the other end of the bearing belt is fixedly connected with a bearing block, the bearing block is fixed on one end of a bearing threaded sleeve, and the other end of the bearing threaded sleeve penetrates through a bearing partition plate and is not circumferentially rotatable with the bearing partition plate and can be axially movably assembled; the bearing threaded sleeve is internally provided with a hollow threaded hole, the threaded hole is assembled with one end of a screw rod in a threaded screwing mode, and the other end of the screw rod penetrates through the top plate and then is fixedly connected with an output shaft of the motor through a coupler; the bearing partition plate is fixed on the bearing mounting plate, and the bearing mounting plate is fixed on the top plate; the load bearing belt has flexibility.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021699562.7U CN212677043U (en) | 2020-08-15 | 2020-08-15 | Traction motor dismounting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021699562.7U CN212677043U (en) | 2020-08-15 | 2020-08-15 | Traction motor dismounting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212677043U true CN212677043U (en) | 2021-03-09 |
Family
ID=74821602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021699562.7U Expired - Fee Related CN212677043U (en) | 2020-08-15 | 2020-08-15 | Traction motor dismounting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212677043U (en) |
-
2020
- 2020-08-15 CN CN202021699562.7U patent/CN212677043U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210309 Termination date: 20210815 |