CN116692664A - Hoisting method of large bearing hoisting tool - Google Patents
Hoisting method of large bearing hoisting tool Download PDFInfo
- Publication number
- CN116692664A CN116692664A CN202310593564.XA CN202310593564A CN116692664A CN 116692664 A CN116692664 A CN 116692664A CN 202310593564 A CN202310593564 A CN 202310593564A CN 116692664 A CN116692664 A CN 116692664A
- Authority
- CN
- China
- Prior art keywords
- claw
- lifting
- sliding block
- fixing block
- large bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- 210000000078 claw Anatomy 0.000 claims abstract description 121
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
- B66C1/28—Duplicate, e.g. pivoted, members engaging the loads from two sides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/04—Preventing damage to bearings during storage or transport thereof or when otherwise out of use
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses a hoisting method of a large bearing hoisting tool, which adopts the hoisting tool and comprises the following steps: step 1, determining the installation position of a swing arm, and hinging the swing arm on an upper cross beam frame; step 2, installing a right-handed sliding block and a left-handed sliding block; step 3, connecting a left-handed transmission shaft and a right-handed transmission shaft; step 4, installing a left claw fixing block and a right claw fixing block; step 5, installing proper inner claws or outer claws; step 6, connecting the hanging ring with the upper beam frame reliably; and 7, hooking and connecting the lifting tool with the large bearing, connecting the lifting ring with lifting equipment, and starting lifting. The method has the advantages of simple assembly operation, reasonable structural design, wide assembly selection adaptability, meeting the requirements on the surface precision protection of the large bearing, and safe and simple assembly, disassembly and lifting processes.
Description
Technical Field
The invention belongs to the technical field of mechanical equipment manufacturing, and particularly relates to a hoisting method of a large-scale bearing hoisting tool.
Background
The large-scale bearing is generally designed with a lifting threaded hole, so that the lifting and the installation are convenient and smooth. However, in special cases, due to specific restrictions in terms of strength and structure, a lifting screw hole cannot be designed, and thus lifting and mounting of a large bearing become a rather difficult task.
In addition, the traditional operation method is manual operation, a wire rope is adopted to directly tie up and hoist the large-scale bearing manually when the crown block is lifted, the surface of the large-scale bearing is easy to scratch, the labor intensity of manual operation is high, the operation is complex, the safety is low, and the whole process is low in efficiency, high in cost and poor in reliability.
Disclosure of Invention
The invention aims to provide a lifting method of a large-scale bearing lifting tool, which solves the problem that the surface of a large-scale bearing is easily scratched by adopting a wire rope direct bundling lifting mode for manual operation in the prior art for the large-scale bearing without a lifting threaded hole.
The technical scheme adopted by the invention is that the hoisting method of the large-scale bearing hoisting tool adopts the hoisting tool and is implemented according to the following steps:
step 1, determining the installation position of a swing arm, and hinging the swing arm on an upper cross beam frame;
step 2, installing a right-handed sliding block and a left-handed sliding block;
step 3, connecting a left-handed transmission shaft and a right-handed transmission shaft;
step 4, installing a left claw fixing block and a right claw fixing block;
step 5, installing proper inner claws or outer claws;
step 6, connecting the hanging ring with the upper beam frame reliably;
and 7, hooking and connecting the lifting tool with the large bearing, connecting the lifting ring with lifting equipment, and starting lifting.
The large bearing lifting tool (hereinafter referred to as lifting tool) has the advantages of simple assembly operation, reasonable structural design, wide assembly selection adaptability, meeting the requirements on the surface precision protection of the large bearing, and safe and simple installation, disassembly and lifting processes.
Drawings
FIG. 1 is a perspective view of a trolley used in the method of the present invention;
FIG. 2 is a perspective view of a lifting tool employing an inner jaw one of the unprotected rubber pad of example 1 of the present invention;
FIG. 3 is a perspective view of a lifting tool employing an outer jaw one with an unprotected rubber pad in accordance with example 2 of the present invention;
FIG. 4 is a perspective view of a lifting tool employing a second inner jaw with a protective cushion in accordance with embodiment 3 of the present invention;
FIG. 5 is a perspective view of a lifting tool employing a second outer jaw with a protective cushion in accordance with embodiment 4 of the present invention;
FIG. 6 is a perspective view of a large bearing of a hoisted object in accordance with the method of the present invention;
FIG. 7 is a schematic view of an upper beam frame in the trolley of the present invention;
FIG. 8 is a schematic view of a swing arm in the swing tool of the present invention;
FIG. 9 is a schematic view of a left-hand slider in the swing tool of the present invention;
FIG. 10 is a schematic view of a right-hand slider in the swing tool of the present invention;
FIG. 11 is a schematic view of the drive shaft of the adjustment lever in the trolley of the present invention;
FIG. 12 is a schematic view of an unprotected rubber mat inner jaw in the handling tool of the present invention;
FIG. 13 is a schematic view of an unprotected rubber pad outer jaw in the handling tool of the present invention;
FIG. 14 is a schematic view of a bail in the hoist tool of the present invention;
FIG. 15 is a schematic view of an inner and outer jaw securing block in the trolley of the present invention;
FIG. 16 is a schematic view of a second inner jaw with a protective cushion in the trolley of the present invention;
FIG. 17 is a schematic view of a second outer jaw with a protective cushion in the trolley of the present invention;
FIG. 18 is a schematic view of a manual crank in the trolley of the present invention;
FIG. 19 is a schematic view of a protective rubber pad in the handling tool of the present invention;
FIG. 20 is a schematic view of a second inner jaw with a protective cushion in the trolley of the present invention;
fig. 21 is a schematic view of a second outer jaw with a protective cushion in the trolley of the present invention.
In the figure, a large bearing, a first inner claw, a swing arm, a left claw fixing block, a left-handed sliding block, a upper cross beam frame, a lifting ring, a hinge pin, a right-handed sliding block, a left-handed transmission shaft, a right-handed transmission shaft, a manual crank, a fixing nut, a right-handed claw fixing block, a first inner claw, a second inner claw, a first outer claw, a second outer claw and a protective rubber mat.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The terms "up and down", "left and right" used in the following description are only for the spatial positions shown in the drawings, and are not to be construed as limiting the connection relation of the relevant components, the actual installation positions, and so on.
Referring to fig. 6, the large-scale bearing 1 without a lifting threaded hole is an object of the method, and the application range is that the inner circle is more than 500mm and the outer circle is less than 1400mm.
Referring to fig. 1, the lifting tool adopted by the method of the invention has a structure comprising a lifting ring 7 and an upper beam frame 6, wherein the lifting ring 7 is arranged at the middle position of the upper surface of the upper beam frame 6, and the lifting ring 7 is connected with the upper beam frame 6 in a plugging manner; four mounting holes are respectively and horizontally formed in the two longitudinal sides of the cantilever of the upper beam frame 6 from outside to inside, and two swing arms 3 are respectively hinged in the mounting holes at symmetrical positions of the two sides by hinge pins 8; the middle parts of the two swing arms 3 on the left are hinged with a left-hand sliding block 5, the middle parts of the two swing arms 3 on the right are hinged with a right-hand sliding block 9, the left-hand sliding block 5 and the right-hand sliding block 9 are sleeved with a left-hand and right-hand transmission shaft 10 together, and the outer end of one side of the left-hand and right-hand transmission shaft 10 is provided with a manual crank 11; the lower parts of the two swing arms 3 on the left side are fixedly provided with a left claw fixing block 4, the left claw fixing block 4 is downwards provided with an inner claw or an outer claw, the lower parts of the two swing arms 3 on the right side are fixedly provided with a right claw fixing block 13, the right claw fixing block 13 is symmetrically provided with the inner claw or the outer claw with the same structure, and after the top ends of all the inner claws or the outer claws extend out of the left claw fixing block 4 or the right claw fixing block 13, fixing nuts 12 and/or safety nuts are arranged.
The inner claw used in the invention is divided into an inner claw I2 and an inner claw II 14 according to the size and precision requirements of the large-sized bearing 1, and the outer claw is divided into an outer claw I15 and an outer claw II 16 according to the size and precision requirements of the large-sized bearing 1.
Referring to fig. 7, four horizontal mounting holes are symmetrically formed at both sides of the upper beam frame 6, respectively, and a jack is formed in the middle.
Referring to fig. 8, a circular hole of phi 20H7 is provided in the middle of each swing arm 3.
Referring to fig. 9 and 10, a left-handed thread is machined in a central through hole of the left-handed slider 5, the specification is M20, and a hinge rod is respectively fixed to the two radial sides of the central through hole and used for being inserted into a round hole of the swing arm 3. The size and structure of the right-handed slide block 9 are identical with those of the left-handed slide block 5, except that a right-handed thread is processed in the central through hole of the right-handed slide block 9, and the specification is M20.
Referring to fig. 11, the middle section of the left-right rotation transmission shaft 10 is a polished rod, and left-hand external threads and right-hand external threads are respectively provided on the outer circles of the left-hand section and the right-hand section of the left-right rotation transmission shaft 10. The left-handed external thread (with the specification of M20) is matched with the left-handed sliding block 5, the right-handed external thread (with the specification of M20) is matched with the right-handed sliding block 9, and the distance between the right-handed sliding block 9 and the left-handed sliding block 5 can be controlled by operating the manual crank 11.
Referring to fig. 14, the upper part of the hanging ring 7 is a circular ring, the lower part is a plug rod, and the hanging ring 7 extends into a jack in the middle of the upper beam frame 6 through the plug rod and is fixed reliably.
Referring to fig. 15, the left claw fixing block 4 and the right claw fixing block 13 have the same structure, and two pairs of through holes (with the specification of phi 21) are vertically formed in the upper and lower cross beams of the rectangular frame, so that the straight rod section on the upper part of the inner claw or the outer claw can conveniently pass through the through holes.
Referring to fig. 18, the fixed head of the manual crank 11 is fixedly sleeved with one end of the left-right rotation transmission shaft 10, and the other end of the manual crank 11 is in a handshake position and is manually rocked.
Referring to fig. 19, the protection rubber pad 17 is made of rubber material, and is completely wrapped on the surface of the inner claw or the outer claw, so that the large-sized bearing 1 is prevented from being scratched during hooking.
The hoisting method of the large bearing hoisting tool adopts the hoisting tool and is implemented according to the following steps:
step 1, determining the installation position of the swing arm 3, hinging the swing arm 3 on the upper cross beam frame 6,
the four swing arms 3 are divided into two groups which are respectively connected into symmetrical mounting holes on two sides of the upper beam frame 6 through hinge pins 8 according to the size of the large bearing 1;
step 2, installing a right-handed sliding block 9 and a left-handed sliding block 5,
round holes phi 20H7 are formed in the middle parts of the four swing arms 3 and are respectively in plug-in fit with the phi 20f7 hinging rods in the middle parts of the left-handed sliding block 5 and the right-handed sliding block 9, and the left-handed sliding block 5 and the right-handed sliding block 9 can rotate around the hinging rods in the round holes of the swing arms 3 so as to adapt to the installation angle of the swing arms 3 when being inclined;
step 3, connecting the left-right rotation transmission shaft 10,
the left-right rotation transmission shaft 10 is in threaded sleeve joint with the left-rotation sliding block 5 and the right-rotation sliding block 9, one end of the left-right rotation transmission shaft 10 is provided with left-rotation external threads M20 matched with the left-rotation sliding block 5, and the other end of the left-right rotation transmission shaft is provided with right-rotation external threads M20 matched with the right-rotation sliding block 9;
step 4, installing a left claw fixing block 4 and a right claw fixing block 13,
the left claw fixing block 4 and the right claw fixing block 13 are respectively welded at the lower parts of the swing arms 3 at two sides, so that the left claw fixing block 4, the right claw fixing block 13 and the swing arms 3 where the left claw fixing block and the right claw fixing block are positioned are manufactured into two rigid integers (the rigidity can be improved after the welding, and the integral adjustment is convenient to realize);
step 5, installing proper inner claws or outer claws,
in the through holes of the left claw fixing block 4 and the right claw fixing block 13, proper inner claws or outer claws are selected according to the size of the large bearing 1, the upper straight section of the inner claw or the outer claw is extended into the through hole, and the exposed upper end is fixed by a fixing nut 12 (the specification is M20);
step 6, installing a hanging ring 7,
the hanging ring 7 is reliably connected with the upper beam frame 6;
step 7, hooking and connecting with the large-scale bearing 1,
firstly, according to the actual size of a large bearing 1, an inner claw I2 is used for hooking on the inner ring of the large bearing 1; or the outer claw 15 is used for hooking on the outer ring of the large-scale bearing 1; if the installation environment requirement of the large-scale bearing 1 is very high, the inner claw II 14 and the outer claw II 16 with the protection rubber cushion 17 shown in the figures 16, 17, 20 and 21 are adopted to protect the surface finish of the large-scale bearing 1, avoid the surface from being scratched by collision and ensure finer installation;
then, the manual crank 11 is manually rotated to drive the left-handed sliding block 5 and the right-handed sliding block 9 to move in the same direction or in the opposite direction, and along with the movement of the left-handed sliding block 5 and the right-handed sliding block 9, the swing arms 3 at two ends are driven to swing inwards or outwards simultaneously, so that four inner and outer or four outer claws are tightly attached to the large bearing 1, the large bearing 1 is firmly fixed, and after the fixation is firm, the lifting can be implemented.
Example 1
According to the implementation of the step process of the invention, when the proper inner claw or the proper outer claw is installed in the step 5, referring to fig. 2 and 12, the inner claw I2 without a protection rubber mat is adopted, the left claw fixing block 4 is provided with the two inner claw I2 downwards, the right claw fixing block 13 is symmetrically provided with the two inner claw I2 with the same structure, and the lower ends of the four inner claw I2 are respectively tilted outwards and upwards, so that the inner ring part of the large-sized bearing 1 is conveniently hooked; other components and structures are consistent with the method steps described above.
Example 2
According to the implementation of the step process of the invention, when the proper inner claw or outer claw is installed in the step 5, referring to fig. 3 and 13, the outer claw 15 without a protection rubber mat is adopted, the left claw fixing block 4 is provided with two outer claw 15 downwards, the right claw fixing block 13 is symmetrically provided with two outer claw 15 with the same structure, and the lower ends of the four outer claw 15 are tilted inwards and upwards, so that the outer ring part of the large bearing 1 is conveniently hooked; other components and structures are consistent with the method steps described above.
Example 3
According to the implementation of the step process of the invention, when the proper inner claw or outer claw is installed in the step 5, referring to fig. 4, 16 and 20, the inner claw two 14 with the protection rubber pad is adopted, the left claw fixing block 4 is downwards provided with the two inner claw two 14, the right claw fixing block 13 is symmetrically provided with the two inner claw two 14 with the same structure, and the lower ends of the four inner claw two 14 are horizontally extended outwards, so that the inner ring part of the large bearing 1 is conveniently hooked; other components and structures are consistent with the method steps described above.
Example 4
According to the implementation of the step process of the invention, when the proper inner claw or outer claw is installed in the step 5, referring to fig. 5, 17 and 21, the outer claw two 16 with the protection rubber pad is adopted, the left claw fixing block 4 is provided with the two outer claw two 16 downwards, the right claw fixing block 13 is symmetrically provided with the two outer claw two 16 with the same structure, and the lower ends of the four outer claw two 16 are horizontally extended inwards, so that the outer ring part of the large bearing 1 is conveniently hooked; other components and structures are consistent with the method steps described above.
The assembly process of the lifting tool can also adjust the sequence of individual steps according to the field environment and the size specification of the large-sized bearing 1, so that the lifting can be implemented more adaptively and smoothly.
The method has a large adjustable range, and the inner circle of the large bearing 1 is larger than 500mm, and the outer circle is smaller than 1400mm, so that the method can be safely used. The screw threads of M24X2.5 are arranged at the two ends of the left-handed transmission shaft 10, and have good self-locking property, so that the left-handed sliding block 5 and the right-handed sliding block 9 can be prevented from moving in the lifting process, and the swing arm 3 is ensured to be stable and safe in the whole process.
Claims (8)
1. The lifting method of the large bearing lifting tool is characterized by comprising the following steps of:
step 1, determining the installation position of a swing arm (3), and hinging the swing arm (3) on an upper cross beam frame (6);
step 2, installing a right-handed sliding block (9) and a left-handed sliding block (5); step 3, connecting a left-right rotation transmission shaft (10); step 4, installing a left claw fixing block (4) and a right claw fixing block (13); step 5, installing an inner claw or an outer claw; step 6, connecting the hanging ring (7) with the upper beam frame (6); and 7, hooking and connecting the lifting tool with the large bearing (1), connecting the lifting ring (7) with lifting equipment, and starting lifting.
2. The method of lifting a large bearing lifting tool according to claim 1, wherein in step 1, the specific process is:
the positions of the mounting holes are selected according to the size of the large bearing (1), and the four swing arms (3) are divided into two groups and are respectively connected into the symmetrical mounting holes at two sides of the upper cross beam frame (6) through hinge pins (8).
3. The method of lifting a large bearing lifting tool according to claim 1, wherein in step 2, the specific process is:
round holes are formed in the middle of the four swing arms (3), and are respectively matched with hinge rods in the middle of the left-handed sliding block (5) and the right-handed sliding block (9) in an inserting mode, so that the left-handed sliding block (5) and the right-handed sliding block (9) freely rotate around the hinge rods in the round holes of the swing arms (3), and the installation angle of the swing arms (3) when being inclined is adapted.
4. The method of lifting a large bearing lifting tool as recited in claim 1, wherein in step 3, the specific process is:
the left-right rotation transmission shaft (10) is in threaded sleeve joint with the left-rotation sliding block (5) and the right-rotation sliding block (9), one end of the left-right rotation transmission shaft (10) is provided with left-rotation external threads matched with the left-rotation sliding block (5), and the other end of the left-right rotation transmission shaft is provided with right-rotation external threads matched with the right-rotation sliding block (9).
5. The method of lifting a large bearing lifting tool as recited in claim 1, wherein in step 4, the specific process is:
the left claw fixing block (4) and the right claw fixing block (13) are welded at the lower parts of the swing arms (3) at two sides respectively, so that the left claw fixing block (4), the right claw fixing block (13) and the swing arms (3) where the left claw fixing block and the right claw fixing block are arranged are manufactured into two rigid integers.
6. The method of lifting a large bearing lifting tool according to claim 1, wherein in step 5, the specific process is:
the proper inner claw or outer claw is selected according to the size of the large-sized bearing (1), the upper straight section of the inner claw or outer claw correspondingly stretches into the through holes of the left claw fixing block (4) and the right claw fixing block (13), and the exposed upper end is fixed by a fixing nut (12).
7. The method of lifting a large bearing lifting tool as recited in claim 1, wherein in step 7, the specific process is:
firstly, according to the actual size of a large-sized bearing (1), an inner claw I (2) is used for hooking on the inner ring of the large-sized bearing (1); or the outer claw I (15) is used for hooking on the outer ring of the large-scale bearing (1); if the installation environment requirement of the large bearing (1) is high, an inner claw II (14) and an outer claw II (16) with a protection rubber cushion (17) are adopted;
then, the manual crank (11) is manually rotated to drive the left-handed sliding block (5) and the right-handed sliding block (9) to move in the same direction or in the opposite direction, and along with the movement of the left-handed sliding block (5) and the right-handed sliding block (9), the swing arms (3) at two ends are driven to swing inwards or outwards simultaneously, so that four inner and outer or four outer claws are tightly attached to the large bearing (1), the large bearing (1) is firmly fixed, and finally, the lifting ring (7) is connected with lifting equipment to start lifting.
8. The method of lifting a large bearing trolley of claim 1 wherein: the lifting tool has the structure that the lifting tool comprises a lifting ring (7) and an upper cross beam frame (6), wherein the lifting ring (7) is arranged in the middle of the upper surface of the upper cross beam frame (6); four mounting holes are respectively and horizontally formed in the two longitudinal sides of the cantilever of the upper beam frame (6) from outside to inside, and two swing arms (3) are respectively hinged in the mounting holes at symmetrical positions of the two sides; the middle parts of the two swing arms (3) on the left are hinged with a left rotating slide block (5), the middle parts of the two swing arms (3) on the right are hinged with a right rotating slide block (9), and the left rotating slide block (5) and the right rotating slide block (9) are sleeved with a left rotating transmission shaft (10) together; the lower parts of the two swing arms (3) on the left are fixedly provided with a left claw fixing block (4), the left claw fixing block (4) is downwards provided with an inner claw or an outer claw, the lower parts of the two swing arms (3) on the right are fixedly provided with a right claw fixing block (13), and the right claw fixing block (13) is symmetrically provided with the inner claw or the outer claw with the same structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310593564.XA CN116692664A (en) | 2023-05-24 | 2023-05-24 | Hoisting method of large bearing hoisting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310593564.XA CN116692664A (en) | 2023-05-24 | 2023-05-24 | Hoisting method of large bearing hoisting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116692664A true CN116692664A (en) | 2023-09-05 |
Family
ID=87828498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310593564.XA Pending CN116692664A (en) | 2023-05-24 | 2023-05-24 | Hoisting method of large bearing hoisting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116692664A (en) |
-
2023
- 2023-05-24 CN CN202310593564.XA patent/CN116692664A/en active Pending
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