CN114523047B - Gear bionic-shape tooth surface rolling forming equipment - Google Patents
Gear bionic-shape tooth surface rolling forming equipment Download PDFInfo
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- CN114523047B CN114523047B CN202210165886.XA CN202210165886A CN114523047B CN 114523047 B CN114523047 B CN 114523047B CN 202210165886 A CN202210165886 A CN 202210165886A CN 114523047 B CN114523047 B CN 114523047B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
- B21D53/28—Making other particular articles wheels or the like gear wheels
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Abstract
A gear bionic morphology tooth surface rolling forming device comprises a workbench, a cylinder assembly, a gear tooth surface processing assembly and a reducer assembly; the electric control translation platform is connected with an adjusting slide block, a rack lining block is connected in a T-shaped groove of a fixed block in a sliding mode and fixedly connected with the adjusting slide block, a rack is arranged at the upper end of the rack lining block, a connecting shaft is fixedly connected with a speed reducing motor rotor through a speed reducing motor coupler, the connecting shaft is rotatably connected with a bearing seat arranged on a speed reducing motor support and extends to the outer side of the bearing seat, the head end of the connecting shaft is connected with a gear shaft, a gear is connected with a gear shaft through a spline, a top tailstock is fixedly connected with the speed reducing motor support and is connected with a cone shaft, a plurality of conical blocks with different diameters are connected to the side, close to the gear shaft, of the cone shaft and abutted against the gear shaft for limiting the gear.
Description
Technical Field
The invention relates to the technical field of bionic strengthening of gear tooth surfaces, in particular to gear bionic shape tooth surface roll forming equipment.
Background
The gear tooth surface processing refers to a process for obtaining a specific structure and precision of a gear surface by using a mechanical means, the wear resistance of a gear processed by the existing gear tooth surface processing technology is usually not high, in addition, the situation that the processed gear is difficult to replace exists in the processing process, the production efficiency is extremely low, and the gear tooth surface processing technology is not suitable for processing and manufacturing of a production line. Therefore, the invention designs gear bionic-shape tooth surface rolling forming equipment.
Disclosure of Invention
The invention aims to provide gear bionic morphology tooth surface roll forming equipment which can process regular and densely arranged spherical bionic morphologies on the tooth-shaped surface of a gear, increase the lubricating capability of a gear meshing surface and enhance the wear resistance of the gear, thereby prolonging the service life of the gear.
A gear bionic morphology tooth surface rolling forming device comprises a workbench, a lifting assembly, a cylinder assembly, a gear tooth surface processing assembly and a reducer assembly;
the four corners of the vertical plate of the workbench are longitudinally provided with second slide rails;
the lifting assembly comprises a lifting cushion block, a first worm spiral lifter, a second worm spiral lifter, a rigid shaft of the lifter, a first coupler, a second coupler, a third coupler, a lifting motor base plate and a lifting motor;
the lifting cushion block is arranged on the lower platen of the workbench, a first worm screw lifter and a second worm screw lifter are respectively arranged on two sides of the upper end of the lifting cushion block, two ends of a rigid shaft of the lifter are fixedly connected with the first worm screw lifter and the second worm screw lifter through a first coupler and a second coupler respectively, the lifting motor is connected with the lower platen of the workbench through a lifting motor backing plate, and a lifting motor rotor is fixedly connected with the second worm screw lifter through a third coupler;
the air cylinder assembly comprises a first guide rail, a first air cylinder, a second air cylinder, an air cylinder connecting block, an air cylinder workbench, an air cylinder bracket and a guide rail clamp;
the lower end face of the cylinder workbench is fixedly connected with the movable ends of the first worm screw lifter and the second worm screw lifter, first guide rails are arranged on two sides of the upper end of the cylinder workbench, the cylinder workbench is connected with the second slide rail in a sliding mode through sliding grooves formed in four corners, guide rail clamp devices capable of being clamped on the second slide rail are further arranged at the four corners of the cylinder workbench, the first cylinder and the second cylinder are oppositely arranged on the inner side of the cylinder workbench through cylinder supports, and a piston rod of the first cylinder is connected with a piston rod of the second cylinder through a cylinder connecting block;
the speed reducer assembly comprises a speed reducing motor, a motor fixing plate, a motor base, a speed reducer support, a support frame, a speed reducing motor coupler and an adjustable sizing block, wherein the speed reducing motor is connected with the motor base through the motor fixing plate;
the gear tooth surface processing assembly comprises a fixing block, a rack filler block, a rack, a gear, a T-shaped groove limiting assembly, a connecting shaft, a bearing seat, a gear shaft, a conical shaft, a tip tailstock, an adjusting slide block, an electric control translation table and a conical block;
the fixing block is fixedly connected above the cylinder connecting block and is in sliding connection with the first guide rail, an electric control translation table is arranged in the hollow part of the fixing block, an adjusting slider is connected onto the electric control translation table, a rack lining block is in sliding connection with a T-shaped groove of the fixing block and is fixedly connected with the adjusting slider, T-shaped groove limiting assemblies capable of limiting the rack lining block are arranged in the T-shaped grooves on two sides of the rack lining block, a rack is arranged at the upper end of the rack lining block, a connecting shaft is fixedly connected with a rotor of a speed reducing motor through a speed reducing motor coupler and extends to the outer side of a bearing seat, the connecting shaft is rotatably connected with the bearing seat arranged on a speed reducer support and is connected with a gear shaft through a flange, a gear is connected with the gear shaft through a spline, a tip tailstock is fixedly connected with the speed reducer support and is connected with a taper shaft, a plurality of tapered blocks with different diameters are connected to the side, close to the gear shaft, and the tapered blocks are connected with a collision gear shaft for limiting the gear;
and the tooth-shaped surface of the rack is regularly provided with a bionic forming die matched with the bionic shape of the tooth-shaped surface of the gear to be processed.
Preferably, the bionic tire mold with the rack toothed surface is a regular hemispherical bulge protruding outwards.
Preferably, the speed reducing motor is a servo motor.
Preferably, when the gear to be processed rotates clockwise, the rack moves leftwards, the first cylinder on the left side of the gear to be processed is in an extending state, the second cylinder is in a retracting state, the thrust of the first cylinder needs to be overcome when the rack moves leftwards, meanwhile, the rack receives the meshing force of the gear to be processed, after the first cylinder contracts in place, the second cylinder is in an extending state, the gear to be processed rotates anticlockwise, the gear surface is processed in a reciprocating mode, the first cylinder and the second cylinder provide thrust for the rack, and the bionic morphology is rolled on the surface of the gear.
The invention has the beneficial effects that:
1. the invention can process regular and close-packed spherical bionic morphology on the tooth-shaped surface of the gear, increase the lubricating capacity of the gear meshing surface, and enhance the wear resistance of the gear, thereby prolonging the service life of the gear.
2. The rack can change the position, the rack lining block and the rack fixed at the upper end of the rack lining block can move left and right by adjusting the T-shaped groove limiting component, and the T-shaped groove limiting component is fixed after the rack lining block and the rack are moved to a proper position so as to fix the position of the rack and facilitate the processing of a gear with larger width.
3. The conical blocks are arranged in the conical shaft and the gear shaft, so that the gear is convenient to mount, and the other end of the conical shaft is connected with the tip tailstock, so that the gear is convenient to disassemble and assemble.
4. According to the invention, the worm and gear structures of the first worm screw elevator and the second worm screw elevator are driven to lift through the rotation of the lifting motor, the heights of the fixing block and the rack can be adjusted, and the fixing block and the rack can move in the vertical direction, so that the effects of processing different types of gears and high production efficiency are achieved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the lifting assembly of the present invention.
Fig. 3 is a schematic view of the structure of the cylinder assembly of the present invention.
Fig. 4 is a second perspective structural view of the cylinder assembly of the present invention.
FIG. 5 is a schematic view of a first perspective view of a gear tooth surface machining assembly in accordance with the present invention.
Fig. 6 is a first perspective view of the retarder unit according to the invention.
Fig. 7 is a schematic structural diagram of the internal tapered block of the present invention.
Detailed Description
Referring to fig. 1 to 7, a gear bionic morphology tooth surface rolling forming device comprises a workbench 1, a lifting assembly 2, a cylinder assembly 3, a gear tooth surface processing assembly 4 and a reducer assembly 5;
the four corners of the vertical plate of the workbench 1 are longitudinally provided with second slide rails 10;
the lifting assembly 2 comprises a lifting cushion block 21, a first worm screw lifter 22, a second worm screw lifter 23, a rigid shaft 24 of the lifter, a first coupler 25, a second coupler 26, a third coupler 27, a lifting motor backing plate 28 and a lifting motor 29;
the lifting cushion block 21 is arranged on the lower platen of the workbench 1, a first worm screw lifter 22 and a second worm screw lifter 23 are respectively arranged on two sides of the upper end of the lifting cushion block 21, two ends of a rigid shaft 24 of the lifter are fixedly connected with the first worm screw lifter 22 and the second worm screw lifter 23 through a first coupler 25 and a second coupler 26 respectively, a lifting motor 29 is connected with the lower platen of the workbench 1 through a lifting motor backing plate 28, and a rotor of the lifting motor 29 is fixedly connected with the second worm screw lifter 23 through a third coupler 27; the lifting motor 29 drives the first worm screw lifter 22 and the worm inside the second worm screw lifter 23 to rotate through the lifter rigid shaft 24 so as to drive the movable ends of the first worm screw lifter 22 and the second worm screw lifter 23 to lift; the first worm screw elevator 22 and the second worm screw elevator 23 are of a construction known in the art;
the cylinder assembly 3 comprises a first guide rail 31, a first cylinder 33, a second cylinder 34, a cylinder connecting block 37, a cylinder workbench 38, a cylinder bracket 39 and a guide rail clamp 311;
the lower end face of the cylinder workbench 38 is fixedly connected with the movable ends of the first worm screw elevator 22 and the second worm screw elevator 23, the two sides of the upper end of the cylinder workbench 38 are respectively provided with a first guide rail 31, the cylinder workbench 38 is in sliding connection with the second slide rail 10 through a sliding chute arranged at the four corners, the four corners of the cylinder workbench 38 are also provided with guide rail clamping devices 311 capable of being clamped on the second slide rail 10, the first cylinder 33 and the second cylinder 34 are oppositely arranged on the inner side of the cylinder workbench 38 through cylinder supports 39, and a piston rod of the first cylinder 33 is connected with a piston rod of the second cylinder 34 through a cylinder connecting block 37;
the speed reducer assembly 5 comprises a speed reducing motor 51, a motor fixing plate 52, a motor base 53, a speed reducer bracket 54, a supporting frame 55, a speed reducing motor coupler 56 and an adjustable sizing block 57; the speed reducing motor 51 is connected with the motor base 53 through the motor fixing plate 52, the four corners of the motor base 53 are provided with adjustable sizing blocks 57, the rotor of the speed reducing motor 51 penetrates through the speed reducer support 54 arranged on the motor base 53, and the speed reducer support 54 is also connected with a support frame 55;
the gear tooth surface machining assembly 4 comprises a fixed block 41, a rack pad 42, a rack 43, a gear 44, a T-shaped groove limiting assembly 45, a connecting shaft 49, a bearing seat 411, a gear shaft 412, a conical shaft 413, a tip tailstock 414, an adjusting slide block 415, an electric control translation table 416 and a conical block 417;
a fixed block 41 is fixedly connected above the cylinder connecting block 37 and is in sliding connection with the first guide rail 31, an electric control translation stage 416 is arranged in the hollow interior of the fixed block 41, an adjusting slider 415 is connected on the electric control translation stage 416, a rack lining block 42 is in sliding connection with a T-shaped groove of the fixed block 41 and is fixedly connected with the adjusting slider 415, T-shaped groove limiting assemblies 45 capable of limiting the rack lining block 42 are arranged in the T-shaped grooves on two sides of the rack lining block 42, a rack 43 is arranged at the upper end of the rack lining block 42, a connecting shaft 49 is fixedly connected with a rotor of a speed reducing motor 51 through a speed reducing motor coupler 56, the connecting shaft 49 is rotatably connected with a bearing seat 411 arranged on a speed reducing gear support 54 and extends to the outer side of the bearing seat 411, the head end of the connecting shaft 49 is connected with a gear shaft 412 through a flange, a gear 44 is connected with the gear shaft 412 through a spline, an apex 414 is fixedly connected with the speed reducing gear support 54, a taper shaft 413 is connected on the taper shaft 413 close to the side of the taper shaft 413, and a plurality of taper blocks 417 are connected with the gear shaft 412 and are abutted against the gear shaft 412 to limit the gear 44;
the tooth-shaped surface of the rack 43 is regularly provided with a bionic forming die matched with the bionic shape of the tooth-shaped surface of the gear 44 to be processed.
Furthermore, the bionic tire mold with the toothed surface of the rack 43 is a regular hemispherical protrusion protruding outwards.
More specifically, the deceleration motor 51 is a servo motor.
The working principle and the using process of the invention are as follows:
when in use, the gear 44 to be processed is assembled on the gear shaft 412 through a sliding key, the bevel shaft 413 is arranged on the gear shaft 412 in an overhead mode and used for limiting the gear 44 to be processed, the lifting motor 29 is started, the lifting motor 29 drives the first worm screw lifting machine 22 and the second worm screw lifting machine 23 to rise through the rigid shaft 24 of the lifting machine, at the moment, the air cylinder workbench 38 gradually rises through the matching of sliding grooves arranged at four corners and the second sliding rail 10, the air cylinder workbench is clamped on the second sliding rail 10 through the guide rail clamp 311 after rising to a proper position so as to ensure good stability of the air cylinder workbench 38, the lifting function of the air cylinder workbench 38 is to adapt to the processing of the gears 44 with different diameters, according to the width of the gear 44 to be processed, the electric control translation table 416 is adjusted to drive the movement of the adjusting slide block 415 and the pad 42, and after the pad 42 moves to a position capable of being meshed with the gear 44 to be processed, stopping the operation of the electrically controlled translation stage 416, and using a T-shaped groove limiting component 45 clamped into the T-shaped groove to limit the rack pad block 42, the first air cylinder 33 and the second air cylinder 34 respectively reciprocate in opposite directions, that is, referring to fig. 1, when the gear 44 to be processed rotates clockwise, the rack 43 moves to the left, the first air cylinder 33 on the left side of the gear 44 to be processed is in an extended state, the second air cylinder 34 is in a retracted state, when the rack 43 moves to the left, the thrust of the first air cylinder 33 needs to be overcome, or the first air cylinder 33 retracts slowly, meanwhile, the rack 43 receives the meshing force of the gear 44 to be processed, when the first air cylinder 33 retracts in place, the second air cylinder 34 is in an extended state, the gear 44 to be processed rotates counterclockwise, so as to reciprocate to process the surface of the gear 44, the first air cylinder 33 and the second air cylinder 34 function to provide thrust to the rack 43, the gear 44 rotates to drive the rack 43 to reciprocate, the rack 43 and the fixing block 41 integrally slide on the first guide rail 31 and drive the first cylinder 33 and the second cylinder 34 to reciprocate, the gear 44 and the rack 43 are meshed with each other to roll and form the tooth surface of the bionic feature of the gear 44, and the bionic feature similar to a hemisphere is processed to increase the wear resistance of the surface of the gear 44; the tip tailstock 414 is driven by a servo motor and can control the tip to withdraw so as to be convenient for replacing gears 44 of different models, and when the gears 44 rotate, the conical block 417 props against the gear shaft 412 to synchronously rotate and limit the gears 44; the reducer bracket 54 may reinforce the rigidity of the gear shaft 412, the gear shaft 412 is prevented from shaking. The tip tailstock 414 is of a construction known in the art.
Claims (4)
1. A gear bionic morphology tooth surface rolling forming device is characterized in that: comprises a workbench (1), a lifting component (2), a cylinder component (3), a gear tooth surface processing component (4) and a reducer component (5);
the four corners of the vertical plate of the workbench (1) are longitudinally provided with second sliding rails (10);
the lifting assembly (2) comprises a lifting cushion block (21), a first worm spiral lifter (22), a second worm spiral lifter (23), a rigid shaft (24) of the lifter, a first coupler (25), a second coupler (26), a third coupler (27), a lifting motor cushion plate (28) and a lifting motor (29);
the lifting cushion block (21) is arranged on a lower platen of the workbench (1), a first worm screw lifter (22) and a second worm screw lifter (23) are respectively arranged on two sides of the upper end of the lifting cushion block (21), two ends of a rigid shaft (24) of the lifter are fixedly connected with the first worm screw lifter (22) and the second worm screw lifter (23) through a first coupler (25) and a second coupler (26), a lifting motor (29) is connected with the lower platen of the workbench (1) through a lifting motor backing plate (28), and a rotor of the lifting motor (29) is fixedly connected with the second worm screw lifter (23) through a third coupler (27);
the air cylinder assembly (3) comprises a first guide rail (31), a first air cylinder (33), a second air cylinder (34), an air cylinder connecting block (37), an air cylinder workbench (38), an air cylinder bracket (39) and a guide rail clamp (311);
the lower end face of the air cylinder workbench (38) is fixedly connected with the movable ends of the first worm screw lifter (22) and the second worm screw lifter (23), first guide rails (31) are arranged on two sides of the upper end of the air cylinder workbench (38), the air cylinder workbench (38) is in sliding connection with the second slide rail (10) through sliding grooves formed in four corners, guide rail clamping devices (311) capable of being clamped on the second slide rail (10) are further arranged in the four corners of the air cylinder workbench (38), the first air cylinder (33) and the second air cylinder (34) are oppositely arranged on the inner side of the air cylinder workbench (38) through air cylinder supports (39), and a piston rod of the first air cylinder (33) is connected with a piston rod of the second air cylinder (34) through an air cylinder connecting block (37);
the speed reducer assembly (5) comprises a speed reducing motor (51), a motor fixing plate (52), a motor base (53), a speed reducer support (54), a support frame (55), a speed reducing motor coupler (56) and an adjustable sizing block (57), wherein the speed reducing motor (51) is connected with the motor base (53) through the motor fixing plate (52), the adjustable sizing blocks (57) are arranged at four corners of the motor base (53), a rotor of the speed reducing motor (51) penetrates through the speed reducer support (54) arranged on the motor base (53), and the support frame (55) is further connected onto the speed reducer support (54);
the gear tooth surface machining assembly (4) comprises a fixed block (41), a rack pad block (42), a rack (43), a gear (44), a T-shaped groove limiting assembly (45), a connecting shaft (49), a bearing seat (411), a gear shaft (412), a conical shaft (413), an apex tailstock (414), an adjusting slider (415), an electric control translation table (416) and a conical block (417);
the fixing block (41) is fixedly connected above the air cylinder connecting block (37) and is in sliding connection with the first guide rail (31), an electric control translation table (416) is arranged in the hollow interior of the fixing block (41), an adjusting slider (415) is connected to the electric control translation table (416), a rack lining block (42) is connected to a T-shaped groove of the fixing block (41) in a sliding manner and is fixedly connected with the adjusting slider (415), T-shaped grooves on two sides of the rack lining block (42) are internally provided with a T-shaped groove limiting component (45) capable of limiting the rack lining block (42), a rack (43) is arranged at the upper end of the rack lining block (42), a connecting shaft (49) is fixedly connected with a rotor of a speed reducing motor (51) through a speed reducing motor coupler (56), the tip (49) is rotatably connected with a bearing seat (411) arranged on the speed reducer support (54) and extends to the outer side of the bearing seat (411), the head end of the connecting shaft (49) is connected with a gear shaft (412) through a flange, the gear (44) is connected with the gear shaft (412) through a spline, tips (414) are abutted against the speed reducer support (54) and are connected with a plurality of conical shaft (417), and are connected with conical gear shafts (417) close to conical blocks (417) and used for connecting conical blocks (417) and are connected with the conical shafts (412);
the tooth-shaped surface of the rack (43) is regularly provided with a bionic forming die matched with the bionic shape of the tooth-shaped surface of the gear (44) to be processed.
2. The gear bionic morphology tooth surface rolling forming device according to claim 1, characterized in that: the bionic tire mold on the tooth-shaped surface of the rack (43) is a regular hemispherical bulge protruding outwards.
3. The gear bionic morphology tooth surface rolling forming device according to claim 1, characterized in that: the speed reducing motor (51) is a servo motor.
4. The gear bionic morphology tooth surface rolling forming device according to claim 1, characterized in that: when the gear (44) to be machined rotates clockwise, the rack (43) moves leftwards, the first air cylinder (33) on the left side of the gear (44) to be machined is in an extending state, the second air cylinder (34) is in a retracting state, when the rack (43) moves leftwards, the thrust of the first air cylinder (33) needs to be overcome, meanwhile, the rack (43) is subjected to the meshing force of the gear (44) to be machined, when the first air cylinder (33) contracts to a certain position, the second air cylinder (34) is in an extending state, the gear (44) to be machined rotates anticlockwise, the machining of the surface of the gear (44) is achieved in a reciprocating mode, the first air cylinder (33) and the second air cylinder (34) provide thrust for the rack (43), and the bionic morphology is rolled on the surface of the gear (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210165886.XA CN114523047B (en) | 2022-02-23 | 2022-02-23 | Gear bionic-shape tooth surface rolling forming equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210165886.XA CN114523047B (en) | 2022-02-23 | 2022-02-23 | Gear bionic-shape tooth surface rolling forming equipment |
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| Publication Number | Publication Date |
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| CN114523047A CN114523047A (en) | 2022-05-24 |
| CN114523047B true CN114523047B (en) | 2022-10-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210165886.XA Active CN114523047B (en) | 2022-02-23 | 2022-02-23 | Gear bionic-shape tooth surface rolling forming equipment |
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| CN117810373B (en) * | 2024-02-28 | 2024-04-30 | 常州纳科诺尔精密轧制设备有限公司 | Lithium ion battery electrode plate roll squeezer and rolling method thereof |
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| CN204685874U (en) * | 2015-04-15 | 2015-10-07 | 西安理工大学 | High speed cold is tempered lathe indexing fixture |
| CN108453318A (en) * | 2018-04-15 | 2018-08-28 | 吉林大学 | A kind of rolling tool and its method for the bionical micro-structure processing of gear surface |
| CN113426873A (en) * | 2021-06-25 | 2021-09-24 | 吉林大学 | Spinning forming device and method with bionic drag reduction surface fairing |
| CN215144181U (en) * | 2021-05-31 | 2021-12-14 | 东莞帕姆蒂昊宇液态金属有限公司 | Hot-pressing equipment for manufacturing flexible gear of amorphous alloy harmonic reducer |
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2022
- 2022-02-23 CN CN202210165886.XA patent/CN114523047B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4596127A (en) * | 1983-09-12 | 1986-06-24 | Ex-Cell-O Corporation | Method and machine for splining clutch hubs |
| CN1126640A (en) * | 1994-11-30 | 1996-07-17 | 昭和株式会社 | Method of manufacturing an automobile steering rack |
| CN1913988A (en) * | 2004-02-06 | 2007-02-14 | 恩斯特格罗布股份公司 | Device and method for producing tooth-like profiled sections on workpieces |
| CN104741493A (en) * | 2013-12-27 | 2015-07-01 | 爱信精机株式会社 | Form rolling apparatus and form rolling method |
| CN204685874U (en) * | 2015-04-15 | 2015-10-07 | 西安理工大学 | High speed cold is tempered lathe indexing fixture |
| CN108453318A (en) * | 2018-04-15 | 2018-08-28 | 吉林大学 | A kind of rolling tool and its method for the bionical micro-structure processing of gear surface |
| CN215144181U (en) * | 2021-05-31 | 2021-12-14 | 东莞帕姆蒂昊宇液态金属有限公司 | Hot-pressing equipment for manufacturing flexible gear of amorphous alloy harmonic reducer |
| CN113426873A (en) * | 2021-06-25 | 2021-09-24 | 吉林大学 | Spinning forming device and method with bionic drag reduction surface fairing |
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| CN114523047A (en) | 2022-05-24 |
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