CN116475443A - Dead protection mechanism of drive equipment for lathe processing - Google Patents
Dead protection mechanism of drive equipment for lathe processing Download PDFInfo
- Publication number
- CN116475443A CN116475443A CN202310630818.0A CN202310630818A CN116475443A CN 116475443 A CN116475443 A CN 116475443A CN 202310630818 A CN202310630818 A CN 202310630818A CN 116475443 A CN116475443 A CN 116475443A
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- fixed
- gear box
- box
- main shaft
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- 230000007246 mechanism Effects 0.000 title claims abstract description 42
- 239000012530 fluid Substances 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 239000000725 suspension Substances 0.000 claims abstract description 5
- 238000005086 pumping Methods 0.000 claims description 26
- 238000003754 machining Methods 0.000 claims description 20
- 125000006850 spacer group Chemical group 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 2
- 230000002035 prolonged effect Effects 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B25/00—Accessories or auxiliary equipment for turning-machines
- B23B25/04—Safety guards specially designed for turning machines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
Abstract
The invention relates to the technical field of protection of driving systems, in particular to a locking protection mechanism of driving equipment for lathe processing, which comprises a transmission case, wherein two sides of the transmission case are respectively and rotatably connected with a main shaft and an output shaft, the side wall of the main shaft is in sealed and rotatable connection with a gear box, the side wall of the output shaft is fixedly provided with a speed reducing tooth, the speed reducing tooth is meshed with the gear box, the side wall of the main shaft is fixedly provided with a plurality of driving plates, electrorheological fluid is filled in the gear box, the driving plates are positioned in the gear box and wrapped by the electrorheological fluid, the inner wall of the transmission case is fixedly provided with an electric connection box, and the inner top of the electric connection box is connected with an electric connection block through a suspension spring. The advantages are that: when the output is blocked, the electrorheological fluid is restored to be liquid, so that the main shaft can rotate automatically without being limited by the gear box, and when the output is blocked, the main shaft keeps rotating without influencing the driving motor, and the service life of the driving part is greatly prolonged.
Description
Technical Field
The invention relates to the technical field of protection of driving systems, in particular to a locking protection mechanism of driving equipment for lathe machining.
Background
In a driving system of a common lathe, a direct driving component is generally a motor, the motor is an electromagnetic device for realizing electric energy conversion or transmission according to an electromagnetic induction law, the motor is used as a power source for providing power, the driving device operates, and a main shaft of the motor is blocked and is not powered off, so that the service life of the motor is greatly reduced.
When the lathe is machined, the operation error is encountered, the feed amount is overlarge, or the hardness of a workpiece is higher, so that when the workpiece cannot be directly machined at a high speed, the spindle of the lathe is easy to clamp and stop, and finally the internal consumption of a driving system is caused to damage the spindle.
Disclosure of Invention
The invention aims to solve the problem of driving damage caused by clamping in the prior art, and provides a clamping protection mechanism of driving equipment for lathe machining.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the clamping protection mechanism of the driving device for lathe machining comprises a transmission case, wherein two sides of the transmission case are respectively and rotatably connected with a main shaft and an output shaft, the side wall of the main shaft is in sealed and rotatable connection with a gear box, the side wall of the output shaft is fixedly provided with a reduction gear which is meshed with the gear box, the side wall of the main shaft is fixedly provided with a plurality of driving plates, electrorheological fluid is filled in the gear box, and the driving plates are positioned in the gear box and are wrapped by the electrorheological fluid;
the inner wall of transmission case is fixed with the electric connection case, the interior top of electric connection case is connected with the electric connection piece through hanging the spring, the inner wall of electric connection case inlays and is equipped with a pair of electric plates, the inside of electric connection case is equipped with outage mechanism, the inner wall of transmission case is fixed with the pump gas case, the inside of pump gas case is equipped with pump gas slow-release mechanism, the lateral wall of drive board is equipped with pump gas actuating mechanism.
In the dead lock protection mechanism of the driving device for lathe machining, the pumping driving mechanism comprises an installation shaft fixed on the side wall of the gear box, a pushing wheel is fixed on the side wall of the installation shaft, and the end face of the pushing wheel is an inclined plane.
In the dead protection mechanism of the driving device for lathe processing, the pumping slow-release mechanism comprises a piston plate which is in sealing sliding connection with the inner wall of the pumping box, a piston spring is fixed on the piston plate and the inner wall of the pumping box together, a push rod is fixed on the side wall of the piston plate, a push ball is connected to the end part of the push rod in a rotating mode, an air inlet hole is formed in the side wall of the pumping box in a penetrating mode, an air outlet pipe communicated with the inside of the power connection box is arranged in the side wall of the pumping box in a penetrating mode, and one-way valves are arranged in the air inlet hole and the inside of the air outlet pipe.
In the dead protection mechanism of the driving device for lathe machining, the power-off mechanism comprises an adsorption block fixed at the inner bottom of the power-on box, the adsorption block is used for attracting the power-on block to separate from the power-on plate, the side wall of the power-on box is provided with ventilation holes in a penetrating mode, the side wall of the transmission box is provided with ventilation holes in a penetrating mode, and the side walls of the power-on box and the transmission box are provided with exhaust holes for air flow.
In the dead protection mechanism of the driving device for lathe processing, the spacer ring is fixed on the inner wall of the gear box, the main shaft is connected with the inner wall of the spacer ring in a sealing and rotating mode, a plurality of magnetic plates are fixed on the side wall of the main shaft, the magnetic plates and the driving plates are respectively located on two sides of the spacer ring, magnetorheological fluid is filled in the gear box, the magnetorheological fluid and the electrorheological fluid are respectively located on two sides of the spacer ring, a plurality of magnetic blocks are fixed on the inner wall of the gear box, and the magnetic blocks and the magnetic plates are immersed in the magnetorheological fluid.
In the dead lock protection mechanism of the driving device for lathe machining, a counter is fixed on the inner wall of the power receiving box, the counter is positioned at the lower part of the power receiving plate, and the counter is used for counting and disconnecting the power supply of the device when being electrically pressed and is connected with an external controller.
Compared with the prior art, the invention has the advantages that:
1. when the piston plate reciprocates, the air flow in the transmission case is accelerated, so that external air enters through the air vent and is discharged through the air vent, further, friction heat generated by transmission parts in the transmission case is rapidly diffused, and the service life of equipment is prolonged;
2. when the output is blocked, the electrorheological fluid is restored to be in a liquid state, so that the main shaft can rotate automatically without being limited by a gear box, and when the output is blocked, the main shaft keeps rotating without influencing a driving motor, and the service life of a driving part is greatly prolonged;
3. by arranging the magnetorheological fluid, the magnetic block and the magnetic plate, the gear box can still be driven to slowly rotate when the clamping occurs, so that the output shaft can be maintained to slowly rotate outwards, the output shaft is not completely clamped and cannot be output, and when the device faces some materials difficult to process at one time, the final processing can be completed through a slow small amount of processing, the adaptability of the device is improved, and the service life of the driving motor of the device is not influenced;
4. when the magnet passes through the power-on block, the power-on block performs small-amplitude shaking, and then triggers the counting of the counter, after the counting reaches a certain value, an electric number is output, and an external control system turns off the power supply of the driving system, so that the whole equipment stops acting, excessive continuous processing caused by the fact that no workpiece which cannot be processed is found in time is avoided, the equipment runs for a long time, the service life of the equipment is influenced, and the service life and safety of the equipment are improved.
Drawings
Fig. 1 is a schematic structural view of a locking protection mechanism of a driving device for lathe machining according to the present invention;
FIG. 2 is a half cross-sectional view of a lock protection mechanism of a driving device for lathe machining according to the present invention;
fig. 3 is a top cross-sectional view of a lock protection mechanism of a driving device for lathe machining according to the present invention;
FIG. 4 is a schematic view showing the external structure of a gear box part of a seizing protection mechanism of a driving device for lathe machining according to the present invention;
FIG. 5 is a schematic diagram of the structure of a pumping box part of a locking protection mechanism of a driving device for lathe machining;
fig. 6 is a schematic diagram of the internal structure of a gear box in a second embodiment of a seizing protection mechanism of a driving device for lathe machining according to the present invention;
fig. 7 is a schematic diagram of the internal structure of a second intermediate connection box portion of the second embodiment of the lock protection mechanism of the driving device for lathe machining according to the present invention.
In the figure: the device comprises a transmission case 1, a main shaft 2, an output shaft 3, a gear box 4, a speed reducing gear 5, a driving plate 6, a mounting shaft 7, a propelling wheel 8, a power receiving case 9, a suspension spring 10, a power receiving block 11, a power receiving plate 12, an adsorption block 13, a ventilation hole 14, an exhaust hole 15, a pumping air box 16, a piston spring 17, a piston plate 18, a push rod 19, a push ball 20, an air inlet 21, an air outlet 22, an air vent 23, a partition ring 24, a magnetic plate 25, a magnetic block 26 and a counter 27.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.
Example 1
Referring to fig. 1-5, a dead lock protection mechanism of a driving device for lathe machining comprises a transmission case 1, wherein two sides of the transmission case 1 are respectively connected with a main shaft 2 and an output shaft 3 in a rotating way, the main shaft 2 is connected with a driving motor, the output shaft 3 is connected with a machining shaft, the side wall of the main shaft 2 is connected with a gear box 4 in a sealing rotating way, a speed reducing tooth 5 is fixed on the side wall of the output shaft 3, the speed reducing tooth 5 is meshed with the gear box 4, a plurality of driving plates 6 are fixed on the side wall of the main shaft 2, electrorheological fluid is filled in the gear box 4, the driving plates 6 are positioned in the gear box 4 and are wrapped by the electrorheological fluid, and the electrorheological fluid is solidified after being electrified, so that the flowability is lost, the wrapped driving plates 6 are combined with the electrorheological fluid, the rotation of the main shaft 2 can drive the gear box 4 to rotate, and then the isomorphic gear is meshed to finish external output transmission;
the inner wall of the transmission case 1 is fixed with an electric connection box 9, the inner top of the electric connection box 9 is connected with an electric connection block 11 through a suspension spring 10, a pair of electric connection plates 12 are embedded in the inner wall of the electric connection box 9, the electric connection block 11 conducts the two electric connection plates 12, so that electrorheological fluid is electrified and solidified, the electrorheological fluid is powered off after the electric connection block 11 is separated from the electric connection plates 12, the electrorheological fluid is recovered to be in a liquid state, an outage mechanism is arranged in the electric connection box 9, a pumping box 16 is fixed on the inner wall of the transmission case 1, a pumping slow-release mechanism is arranged in the pumping box 16, and a pumping driving mechanism is arranged on the side wall of the driving plate 6.
The pumping driving mechanism comprises a mounting shaft 7 fixed on the side wall of the gear box 4, a propulsion wheel 8 is fixed on the side wall of the mounting shaft 7, the end face of the propulsion wheel 8 is an inclined plane, and the propulsion wheel 8 rotates under the drive of the mounting shaft 7.
The pumping slow release mechanism comprises a piston plate 18 which is in sealed sliding connection with the inner wall of a pumping box 16, a piston spring 17 is jointly fixed on the piston plate 18 and the inner wall of the pumping box 16, a push rod 19 is fixed on the side wall of the piston plate 18, a top ball 20 is rotatably connected to the end part of the push rod 19, the top ball 20 is always propped against the inclined plane of a propelling wheel 8, the abrasion is reduced by means of the rotatability of the push rod, an air inlet 21 is formed in the side wall of the pumping box 16 in a penetrating manner, an air outlet 22 communicated with the inside of a power box 9 is arranged in the penetrating manner on the side wall of the pumping box 16, one-way valves are arranged in the air inlet 21 and the inside of the air outlet 22, and the piston plate 18 can do reciprocating piston motion under the cooperation of the piston spring 17 due to the fact that the end face of the propelling wheel 8 is the inclined plane, and therefore air in the transmission box 1 is conveyed into the power box 9.
The power-off mechanism comprises an adsorption block 13 fixed at the inner bottom of the power-on box 9, the adsorption block 13 is used for attracting the power-on block 11 to separate from the power-on plate 12, the adsorption block 13 is an electromagnet, when the equipment operates, the power-on block 11 is attracted to move downwards, the side wall of the power-on box 9 is penetrated and provided with an air vent 14, the side wall of the transmission box 1 is penetrated and provided with an air vent 23, the side walls of the power-on box 9 and the transmission box 1 are provided with air vents 15 for air circulation, when the piston plate 18 reciprocates, the air flow in the transmission box 1 is accelerated, so that external air enters through the air vent 23 and is discharged through the air vent 15, and further, the friction heat generated by transmission parts in the transmission box 1 is rapidly diffused, and the service life of the equipment is prolonged;
the air flow filled into the electric connection box 9 is discharged from the air vent 15 in a large quantity, part of the air flow leaves from the air vent 14, after the electric connection block 11 moves downwards for a certain distance, the air vent 15 is shielded, the air vent speed of the single air vent 14 is limited, so that the electric connection block 11 is pushed upwards under the action of air pressure, the electric connection block 11 can not move downwards smoothly to be separated from the electric connection plate 12 all the time during normal air pumping, so that the continuous solidification of electrorheological fluid can be ensured, but when the situation of output clamping occurs, the transmission process is in a nearly stagnation state, so that the gear box 4 can not rotate or rotate at a very slow speed, the air pumping speed is greatly reduced, the ventilation capacity of the air vent 14 is enabled to be used, the electric connection block 11 is separated from the electric connection plate 12 under the action of the adsorption block 13, the electrorheological fluid is enabled to recover to be in a liquid state, the main shaft 2 can rotate by itself without being limited by the gear box 4, the main shaft 2 keeps rotating when the external clamping is not influenced, and the service life of a driving motor is greatly prolonged;
after the whole power is cut off, the power connection block 11 moves upwards and resets under the action of the suspension spring 10, so that the equipment automatically recovers to an initial state, and when the external clamping state is eliminated, the equipment is only required to be restarted.
Example two
Referring to fig. 6, a spacer ring 24 is fixed on the inner wall of the gear case 4, the main shaft 2 is in sealed rotation connection with the inner wall of the spacer ring 24, a plurality of magnetic plates 25 are fixed on the side wall of the main shaft 2, the magnetic plates 25 and the driving plates 6 are respectively positioned on two sides of the spacer ring 24, magnetorheological fluid is filled in the gear case 4, the magnetorheological fluid and the electrorheological fluid are respectively positioned on two sides of the spacer ring 24, a plurality of magnetic blocks 26 are fixed on the inner wall of the gear case 4, and the magnetic blocks 26 and the magnetic plates 25 are immersed in the magnetorheological fluid;
the spacer ring 24 increases magnetorheological fluid under the condition that the regulation and control of the magnetorheological fluid are reserved in two areas inside the gear box 4, when the driving overload occurs outside, the output shaft 3 cannot be directly driven to rotate rapidly, the magnetorheological fluid can liquefy, so that the main shaft 2 rotates automatically, the magnetic plate 25 rotates along with the main shaft 2 when the main shaft 2 rotates, the magnetorheological fluid is subjected to the magnetic field action of the magnetic block 26, the self fluidity is low, the rotation of the main shaft 2 cannot be limited greatly, the generated viscous resistance can be output to a certain extent to drive the gear box 4 to rotate, the magnetic block 26 and the magnetic plate 25 interact with each other magnetically, the gear box 4 can be driven to rotate, although the gear box 4 is not directly driven, and an uncertain transmission ratio exists, the gear box 4 can still be driven to rotate slowly, so that the output shaft 3 can be maintained to rotate slowly outwards, the output shaft cannot be completely blocked and can not be output, the final processing can be completed through slow small amount of processing when the main shaft is faced with some materials difficult to process once, the adaptability of equipment is improved, and the service life of the equipment is not influenced;
the device is not damaged, the worn part is the magnetic plate 25, the manufacturing strength of the magnetic plate 25 is not limited by other requirements, the wear-resistant material can be selected for manufacturing, the wear is not large, and the equipment adaptability is enhanced;
referring to fig. 7, a counter 27 is fixed on the inner wall of the power connection box 9, the counter 27 is positioned at the lower part of the power connection plate 12, the counter 27 is used for counting and disconnecting the power supply of the equipment when the counter 27 is electronically pressed, after the counter is jammed, the power connection block 11 moves downwards to be separated from the power connection plate 12 so as to be propped against the counter 27, and when the subsequent gear box 4 is in retarded rotation driving, the magnetic block 26 is in retarded rotation, so that when the counter 11 passes through the power connection block 11, the magnetic force drives the power connection block 11 to move upwards slightly under the action of the magnetic force, and after the counter is separated from the nearest position, the magnetic force is reduced due to the elongation of the distance, so that the power connection block 11 moves downwards, and when the magnetic block 26 passes through the power connection block 11, the counter 27 is triggered to count, and after the counter reaches a certain value, the external control system turns off the power supply of the driving system, the whole equipment stops, the whole equipment is prevented from being in time, the continuous time is not found, the service life of the equipment is prolonged, and the service life of the equipment is prolonged;
the foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The utility model provides a dead protection machanism of drive arrangement for lathe processing, includes transmission case (1), its characterized in that, the both sides of transmission case (1) are rotated respectively and are connected with main shaft (2) and output shaft (3), the lateral wall of main shaft (2) is sealed to rotate and is connected with gear box (4), the lateral wall of output shaft (3) is fixed with speed reduction tooth (5), speed reduction tooth (5) and gear box (4) meshing, the lateral wall of main shaft (2) is fixed with a plurality of drive boards (6), the inside of gear box (4) is filled with electrorheological fluid, drive board (6) are located inside gear box (4) and are wrapped up by electrorheological fluid;
the inner wall of transmission case (1) is fixed with and connects electric case (9), the interior top of electric case (9) is connected with through suspension spring (10) and connects electric piece (11), the inner wall of electric case (9) inlays and is equipped with a pair of electric plate (12), the inside of electric case (9) is equipped with outage mechanism, the inner wall of transmission case (1) is fixed with pump gas case (16), the inside of pump gas case (16) is equipped with pump gas slow-release mechanism, the lateral wall of drive board (6) is equipped with pump gas actuating mechanism.
2. The dead lock protection mechanism of a driving device for lathe machining according to claim 1, wherein the pumping driving mechanism comprises a mounting shaft (7) fixed on the side wall of a gear box (4), a pushing wheel (8) is fixed on the side wall of the mounting shaft (7), and the end face of the pushing wheel (8) is an inclined plane.
3. The dead protection mechanism of drive equipment for lathe machining according to claim 2, wherein the pumping slow-release mechanism comprises a piston plate (18) which is in sealing sliding connection with the inner wall of a pumping box (16), a piston spring (17) is fixed on the piston plate (18) and the inner wall of the pumping box (16) together, a push rod (19) is fixed on the side wall of the piston plate (18), a push ball (20) is rotatably connected to the end part of the push rod (19), an air inlet hole (21) is formed in the side wall of the pumping box (16) in a penetrating manner, an air outlet pipe (22) communicated with the inside of a power receiving box (9) is arranged in the side wall of the pumping box (16) in a penetrating manner, and one-way valves are arranged in the air inlet hole (21) and the air outlet pipe (22).
4. A dead guard mechanism of drive equipment for lathe machining according to claim 3, characterized in that, the outage mechanism is including being fixed in the absorption piece (13) of bottom in electric connection case (9), absorption piece (13) are used for attracting electric connection piece (11) and break away from electric connection board (12), bleeder vent (14) have been seted up in the lateral wall of electric connection case (9) run through, bleeder vent (23) have been seted up in the lateral wall of transmission case (1) run through, exhaust hole (15) for the air current circulation have been seted up in the lateral wall of electric connection case (9) and transmission case (1).
5. The dead protection mechanism of driving equipment for lathe machining according to claim 1, wherein a spacer ring (24) is fixed on the inner wall of the gear box (4), the main shaft (2) is connected with the inner wall of the spacer ring (24) in a sealing and rotating mode, a plurality of magnetic plates (25) are fixed on the side wall of the main shaft (2), the magnetic plates (25) and the driving plates (6) are respectively located on two sides of the spacer ring (24), magnetorheological fluid is filled in the gear box (4), the magnetorheological fluid and the electrorheological fluid are respectively located on two sides of the spacer ring (24), a plurality of magnetic blocks (26) are fixed on the inner wall of the gear box (4), and the magnetic blocks (26) and the magnetic plates (25) are immersed in the magnetorheological fluid.
6. The dead lock protection mechanism of a driving device for lathe machining according to claim 5, wherein a counter (27) is fixed on the inner wall of the power receiving box (9), the counter (27) is located at the lower part of the power receiving plate (12), and the counter (27) is an electronic pressing counter and is connected with an external controller for counting and disconnecting a power supply of the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310630818.0A CN116475443A (en) | 2023-05-31 | 2023-05-31 | Dead protection mechanism of drive equipment for lathe processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310630818.0A CN116475443A (en) | 2023-05-31 | 2023-05-31 | Dead protection mechanism of drive equipment for lathe processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116475443A true CN116475443A (en) | 2023-07-25 |
Family
ID=87215831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310630818.0A Withdrawn CN116475443A (en) | 2023-05-31 | 2023-05-31 | Dead protection mechanism of drive equipment for lathe processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116475443A (en) |
-
2023
- 2023-05-31 CN CN202310630818.0A patent/CN116475443A/en not_active Withdrawn
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Application publication date: 20230725 |