CN214429094U - Lengthened insulated electric fastening tool - Google Patents
Lengthened insulated electric fastening tool Download PDFInfo
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- CN214429094U CN214429094U CN202120414381.3U CN202120414381U CN214429094U CN 214429094 U CN214429094 U CN 214429094U CN 202120414381 U CN202120414381 U CN 202120414381U CN 214429094 U CN214429094 U CN 214429094U
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Abstract
The application discloses insulating electronic fastening tool of extension. The lengthened insulated electric fastening tool comprises a handheld main body, a lengthened insulating rod, a fastening installation shell, a bolt locking assembly and a transmission structure. The hand-held body is provided with a drive unit. The extension insulator spindle includes first insulating tube and the second insulating tube that links to each other through coupling assembling, and first insulating tube is fixed in holds the main part. The fastening installation housing is connected to an end of the second insulating tube. The bolt locking assembly is arranged on the fastening installation shell and is provided with a sleeve for locking the bolt. The transmission structure is located the extension insulator spindle to run through to fastening installation shell and be connected with bolt locking assembly transmission, drive unit orders about the sleeve through transmission structure and rotates. The electric fastening tool with lengthened insulation can fasten the loosened bolt on the power transmission line.
Description
Technical Field
The application relates to the technical field of electric power overhaul, in particular to an insulated electric fastening tool with a lengthened structure.
Background
The 5kV strain insulator drainage wire uses being mostly the longer circuit of operating duration that parallel groove clamp connects, be mostly single line power supply because of 35kV, the circuit defect can not get the power failure for a long time and overhauls the processing, the circuit defect accumulation is more, especially the gold utensil of main tie point is because of the time longer not overhauld, the oxidation appears in the wire, the bolt galvanizing coat disappears, the bolt corrosion is serious, get off for a long time and lead to using parallel groove clamp tie point appearance not hard up, the space, if can not get timely processing, the trouble that the drainage was burnt out can appear. There is currently no suitable tool for indirectly tightening and replacing the bolt.
SUMMERY OF THE UTILITY MODEL
The application provides an insulating electronic fastening means of extension for the not hard up bolt on the fastening transmission line.
The application provides an insulating electronic fastening tool of extension, includes:
a grip body configured with a drive unit;
the lengthened insulating rod comprises a first insulating pipe and a second insulating pipe which are connected through a connecting assembly, and the first insulating pipe is fixed on the handheld main body;
a fastening installation shell connected to the end of the second insulating tube;
the bolt locking assembly is arranged on the fastening installation shell and is provided with a sleeve for locking a bolt; and
the transmission structure is positioned in the lengthened insulating rod and penetrates through the fastening installation shell to be in transmission connection with the bolt locking assembly, and the driving unit drives the sleeve to rotate through the transmission structure.
In the process of realizing the tool, a maintainer can hold the hand-held main body to conveniently operate the tool so as to timely fasten the loosened bolt in the live working of the power transmission line. Because the lengthened insulating rod is arranged, bolts far away can be reinforced, an operator holds the main body by hand, the sleeve is sleeved on the bolts, the driving unit is started, and therefore the sleeve is driven to rotate, and finally fastening work of the bolts is finished.
Optionally, in one possible implementation, the connection assembly includes a cylindrical connection screw and a cylindrical connection nut;
the external thread of the connecting screw is screwed on the inner wall of the first insulating pipe and the inner wall of the connecting nut;
and the external thread of the connecting nut is screwed on the inner wall of the second insulating pipe.
Above-mentioned in-process of realizing can assemble first insulating tube and second insulating tube effectively through connecting screw and coupling nut to make the length of extension insulating rod accord with the actual work demand.
Optionally, in a possible implementation manner, the transmission structure includes a first transmission rod, a second transmission rod, a first transmission connector and a second transmission connector;
one end of the first transmission rod is in transmission connection with the driving unit, and the other end of the first transmission rod is clamped with the first transmission connecting piece;
one end of the second transmission rod is in transmission connection with the bolt locking assembly, the other end of the second transmission rod is in clamping connection with the second transmission connecting piece, and the first transmission connecting piece is in clamping connection with the second transmission connecting piece.
In the process of realizing, the first transmission connecting piece is clamped in the opening of the first transmission rod, the second transmission connecting piece is clamped in the opening of the second transmission rod, the first transmission connecting piece is clamped in the second transmission connecting piece, the torque of the first transmission connecting piece can be effectively transmitted to the second transmission rod, and the power generated by the driving unit is ensured to be smoothly transmitted to the bolt locking assembly. It should be noted that, in order to ensure that the first transmission rod and the second transmission rod smoothly rotate in the lengthened insulating rod, the first transmission connecting piece is sleeved with a bearing, and the bearing is in contact with the inner wall of the lengthened insulating rod or the inner wall of the connecting screw.
Optionally, in one possible implementation, the bolt locking assembly includes a transmission assembly, a centrifugal flywheel, and a transmission shaft;
the transmission assembly, the centrifugal flywheel and the transmission shaft are rotatably arranged in the fastening installation shell, and the second transmission rod is in transmission connection with the transmission assembly;
the transmission assembly is in transmission connection with the centrifugal flywheel, one end of the transmission shaft is fixed with the centrifugal flywheel, and the other end of the transmission shaft is fixed with the sleeve.
In the implementation process, the second transmission rod transmits the torque to the transmission assembly, and the power is transmitted through the centrifugal flywheel, so that the sleeve can stably rotate under the condition of large torque to stably screw the bolt.
Optionally, in one possible implementation, the transmission assembly includes a first toothed transmission disc and a second toothed transmission disc;
the first gear transmission disc is provided with a plurality of first gear transmission tooth structures, the second gear transmission disc is provided with a plurality of second gear transmission tooth structures, and the first gear transmission tooth structures and the second gear transmission tooth structures are meshed with each other;
the first gear transmission disc is supported in the fastening installation shell through a bearing, a transmission block is formed on one side of the first gear transmission disc, the transmission block is inserted into the second transmission rod, and the second transmission gear structure is connected with the centrifugal flywheel.
Optionally, in a possible implementation manner, the centrifugal flywheel includes a rotating shaft and a flywheel body which are connected and coaxial with each other;
the rotating shaft is supported in the fastening installation shell through a bearing and is connected with the second transmission gear structure;
the flywheel body is C-shaped, a groove is formed in the inner surface of the flywheel body, the groove is connected with one end of the transmission shaft through a bearing, and an opening of the flywheel body is fixed with the periphery of the transmission shaft through the bearing;
and a wear-resistant shaft sleeve is fixed in the fastening installation shell and is fixed at the periphery of the transmission shaft.
Optionally, in one possible implementation, the driving unit includes a battery module, a control switch, a driving module, and a reduction transmission module;
the battery module is arranged in the handheld main body, a charging hole corresponding to the battery module is formed in the outer side of the handheld main body, and the battery module is configured to be charged and discharged and used for supplying power to the driving module;
the drive module is arranged in the hand-held main body, the control switch is arranged on the outer surface of the hand-held main body and used for controlling the working state of the drive module, and the drive module is connected with the speed reduction transmission module;
the speed reduction transmission module is arranged in the hand-held main body and is connected with the transmission structure.
In the implementation process, a maintainer can control whether the driving module works or not and control the positive and negative directions of the output power of the driving module through the control switch; meanwhile, the battery module is conveniently charged by connecting the charger through the charging hole.
Optionally, in a possible implementation manner, the driving module includes a motor, and the control switch includes a power switch and a positive-negative switch;
the power switch is used for controlling the conduction of the battery module and the motor, and the positive and negative switch is used for controlling the steering of the motor;
the driving unit further comprises a display screen, and the display screen is connected with the battery module and used for displaying the state of the battery module.
In the implementation process, the battery module is turned on through the battery switch, power can be supplied to the motor, and the voltage of the power supply module and the remaining percentage of the electric quantity can be observed on the display screen; the steering of the motor is controlled through the positive and negative switches so as to achieve the effect of locking or loosening the bolt.
Optionally, in a possible implementation manner, the reduction transmission module includes a reduction gear, an output shaft of the motor is provided with a transmission gear, the transmission gear is engaged with the reduction gear, and the reduction gear is fixed at an end of the transmission structure.
Optionally, in one possible implementation, the top of the hand grip body is formed with a grip slot.
In the process of the implementation, the maintainer can hold the holding groove at the top of the handheld main body, so that the lengthened insulated electric fastening tool can be easily taken and operated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a perspective view of an elongated insulated power fastening tool of the present embodiment;
FIG. 2 is a schematic view of the connecting assembly of the present embodiment;
FIG. 3 is a sectional view of the bolt lock assembly in this embodiment;
fig. 4 is an internal view of the hand-held body according to the embodiment.
Icon: 10-holding the body; 11-lengthening an insulating rod; 12-a secure mounting housing; 13-bolt locking assembly; 13 a-a sleeve; 14-a transmission structure; 15-a first insulating tube; 16-a second insulating tube; 17-a connecting assembly; 18-connecting screws; 19-a coupling nut; 20-a first transfer lever; 21-a second transmission rod; 22-a first drive connection; 23-a second drive connection; 24-a centrifugal flywheel; 25-a drive shaft; 26-a transmission assembly; 27-a first toothed transmission disc; 28-a second toothed transmission disc; 29-wear resistant shaft sleeve; 30-a battery module; 31-a drive module; 32-a reduction transmission module; 33-a charging aperture; 34-a power switch; 35-positive and negative switches; 36-a display screen; 37-battery snap; 38-a battery protection layer; 39-grip groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as conventionally placed in use of the product of the application, or as conventionally understood by those skilled in the art, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The technical solution in the present application will be described below with reference to the accompanying drawings.
The present embodiments provide an insulated power fastening tool that is lengthened for fastening loose bolts on power transmission lines.
Referring to fig. 1, fig. 1 is a perspective view of an elongated insulated electric fastening tool in accordance with the present embodiment.
The lengthened insulated electric fastening tool comprises a hand-held body 10, a lengthened insulated rod 11, a fastening and mounting shell 12, a bolt locking assembly 13 and a transmission structure 14.
The grip body 10 is provided with a drive unit. The elongated insulating rod 11 includes a first insulating tube 15 and a second insulating tube 16 connected by a connecting assembly 17, the first insulating tube 15 being fixed to the grip body 10. The tight fitting housing 12 is attached to the end of the second insulating tube 16. The bolt lock assembly 13 is provided to the fastening installation housing 12, and has a sleeve 13a for locking the bolt. The transmission structure 14 is positioned in the elongated insulating rod 11 and penetrates through the fastening installation shell 12 to be in transmission connection with the bolt locking assembly 13, and the driving unit drives the sleeve 13a to rotate through the transmission structure 14.
In the above implementation process, the maintainer can hold the hand-held main body 10 to conveniently operate the tool, so as to timely fasten the loosened bolt in the live working of the power transmission line. Because of the lengthened insulating rod 11, bolts far away can be reinforced, an operator can hold the main body 10 with a hand, sleeve the bolts, and start the driving unit, so that the sleeve is driven to rotate, and finally the fastening work of the bolts is completed.
Referring to fig. 2, fig. 2 is a schematic view of the connecting assembly 17 in this embodiment.
The coupling assembly 17 includes a cylindrical coupling screw 18 and a cylindrical coupling nut 19. The external thread of the coupling screw 18 is screwed to the inner wall of the first insulating tube 15 and the inner wall of the coupling nut 19. The external thread of the coupling nut 19 is screwed to the inner wall of the second insulating tube 16.
In the implementation process, the first insulating tube 15 and the second insulating tube 16 can be effectively assembled through the connecting screw 18 and the connecting nut 19, so that the length of the lengthened insulating rod 11 meets the actual working requirement.
The transmission structure 14 includes a first transmission rod 20, a second transmission rod 21, a first transmission connector 22 and a second transmission connector 23. One end of the first transmission rod 20 is connected with the driving unit in a transmission manner, and the other end of the first transmission rod 20 is clamped with the first transmission connecting piece 22. One end of the second transmission rod 21 is in transmission connection with the bolt locking assembly 13, the other end of the second transmission rod 21 is clamped with the second transmission connecting piece 23, and the first transmission connecting piece 22 is clamped with the second transmission connecting piece 23.
In the process of the above implementation, the first transmission connecting piece 22 is clamped in the opening of the first transmission rod 20, the second transmission connecting piece 23 is clamped in the opening of the second transmission rod 21, and the first transmission connecting piece 22 is clamped in the second transmission connecting piece 23, so that the torque of the first transmission connecting piece 22 can be effectively transmitted to the second transmission rod 21, and the power generated by the driving unit is ensured to be smoothly transmitted to the bolt locking assembly 13. It should be noted that, in order to ensure that the first transmission rod 20 and the second transmission rod 21 rotate smoothly in the elongated insulating rod 11, the first transmission connecting member 22 is sleeved with a bearing, and the bearing is in contact with the inner wall of the elongated insulating rod 11 or the inner wall of the connecting screw 18.
Referring to fig. 3, fig. 3 is a sectional view of the bolt locking assembly 13 in the present embodiment.
The bolt lock assembly 13 includes a drive assembly 26, a centrifugal flywheel 24 and a drive shaft 25.
The transmission assembly 26, the centrifugal flywheel 24 and the transmission shaft 25 are rotatably arranged in the fastening installation shell 12, and the second transmission rod 21 is in transmission connection with the transmission assembly 26.
The transmission assembly 26 is in transmission connection with the centrifugal flywheel 24, one end of the transmission shaft 25 is fixed with the centrifugal flywheel 24, and the other end is fixed with the sleeve.
In the above implementation process, the second transmission rod 21 transmits the torque to the transmission assembly 26, and the power is transmitted through the centrifugal flywheel 24, so that the sleeve can rotate smoothly under the condition of high torque force, and the bolt can be screwed stably.
In the present disclosure, the transmission assembly 26 includes a first toothed transmission disc 27 and a second toothed transmission disc 28.
The first toothed gearing plate 27 has a plurality of first gearing structures, and the second toothed gearing plate 28 has a plurality of second gearing structures, which mesh with one another. The first gear transmission disc 27 is supported in the fastening installation shell 12 through a bearing, a transmission block is formed on one side of the first gear transmission disc 27, the transmission block is inserted into the second transmission rod 21, and the second gear transmission disc 28 is connected with the centrifugal flywheel 24.
It should be noted that centrifugal flywheel 24 includes a rotating shaft and a flywheel body that are connected to each other and are coaxial. The rotating shaft is supported in the fastening installation shell 12 through a bearing and is connected with the second transmission gear structure. The flywheel body is "C" type, and the internal surface of flywheel body is formed with the recess, and the recess passes through the bearing to be connected with the one end of transmission shaft 25, and the opening of flywheel body passes through the bearing and fixes with the periphery of transmission shaft 25. A wear-resistant shaft sleeve 29 is fixed in the fastening installation shell 12, and the wear-resistant shaft sleeve 29 is fixed on the periphery of the transmission shaft 25.
Referring to fig. 4, fig. 4 is a schematic view of the interior of the hand-held body 10 according to the present embodiment.
The driving unit includes a battery module 30, a control switch, a driving module 31, and a reduction gear module 32. The battery module 30 is built in the grip body 10, and a charging hole 33 corresponding to the battery module 30 is formed at an outer side of the grip body 10, and the battery module 30 is configured to be chargeable and dischargeable for supplying power to the driving module 31. The driving module 31 is arranged in the hand-held body 10, the control switch is arranged on the outer surface of the hand-held body 10, the control switch is used for controlling the working state of the driving module 31, and the driving module 31 is connected with the speed reduction transmission module 32. The reduction drive module 32 is built into the hand grip body 10 and is connected to the drive structure 14.
In the implementation process, the maintainer can control whether the driving module 31 works or not and control the positive and negative directions of the output power of the driving module through the control switch; meanwhile, the battery module 30 is conveniently charged by connecting a charger through the charging hole 33.
In the present disclosure, the driving module 31 includes a motor, and the control switch includes a power switch 34 and a forward/reverse switch 35.
The power switch 34 is used for controlling the conduction of the battery module 30 and the motor, and the positive and negative switch 35 is used for controlling the rotation direction of the motor. The driving unit further comprises a display screen 36, and the display screen 36 is connected with the battery module 30 and is used for displaying the state of the battery module 30.
In the implementation process, the battery module 30 is turned on through the battery switch, power can be supplied to the motor, and the voltage of the power supply module and the remaining percentage of the electric quantity can be observed on the display screen 36; the steering of the motor is controlled through the positive and negative switch 35 to achieve the effect of locking or loosening the bolt.
It should be noted that, the battery module 30 includes a lithium battery, the hand-held body 10 is formed with a battery box, the lithium battery is locked in the battery box through a battery buckle 37, and meanwhile, a battery protection layer 38 is further provided for protecting the lithium battery.
It should be noted that the reduction transmission module 32 includes a reduction gear, an output shaft of the motor is provided with a transmission gear, the transmission gear is engaged with the reduction gear, and the reduction gear is fixed at an end of the transmission structure 14.
Meanwhile, a grip groove 39 is formed at the top of the grip body 10. The service man can hold the holding groove 39 at the top of the hand-held body 10 to easily take and operate the elongated insulated electric fastening tool.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An elongated insulated power fastening tool, comprising:
a grip body configured with a drive unit;
the lengthened insulating rod comprises a first insulating pipe and a second insulating pipe which are connected through a connecting assembly, and the first insulating pipe is fixed on the handheld main body;
a fastening installation shell connected to the end of the second insulating tube;
the bolt locking assembly is arranged on the fastening installation shell and is provided with a sleeve for locking a bolt; and
the transmission structure is positioned in the lengthened insulating rod and penetrates through the fastening installation shell to be in transmission connection with the bolt locking assembly, and the driving unit drives the sleeve to rotate through the transmission structure.
2. The elongate insulated power fastening tool of claim 1,
the connecting assembly comprises a cylindrical connecting screw and a cylindrical connecting nut;
the external thread of the connecting screw is screwed on the inner wall of the first insulating pipe and the inner wall of the connecting nut;
and the external thread of the connecting nut is screwed on the inner wall of the second insulating pipe.
3. The elongate insulated power fastening tool of claim 2,
the transmission structure comprises a first transmission rod, a second transmission rod, a first transmission connecting piece and a second transmission connecting piece;
one end of the first transmission rod is in transmission connection with the driving unit, and the other end of the first transmission rod is clamped with the first transmission connecting piece;
one end of the second transmission rod is in transmission connection with the bolt locking assembly, the other end of the second transmission rod is in clamping connection with the second transmission connecting piece, and the first transmission connecting piece is in clamping connection with the second transmission connecting piece.
4. The elongate insulated power fastening tool of claim 3,
the bolt locking assembly comprises a transmission assembly, a centrifugal flywheel and a transmission shaft;
the transmission assembly, the centrifugal flywheel and the transmission shaft are rotatably arranged in the fastening installation shell, and the second transmission rod is in transmission connection with the transmission assembly;
the transmission assembly is in transmission connection with the centrifugal flywheel, one end of the transmission shaft is fixed with the centrifugal flywheel, and the other end of the transmission shaft is fixed with the sleeve.
5. The elongate insulated power fastening tool of claim 4,
the transmission assembly comprises a first tooth transmission disc and a second tooth transmission disc;
the first gear transmission disc is provided with a plurality of first gear transmission tooth structures, the second gear transmission disc is provided with a plurality of second gear transmission tooth structures, and the first gear transmission tooth structures and the second gear transmission tooth structures are meshed with each other;
the first gear transmission disc is supported in the fastening installation shell through a bearing, a transmission block is formed on one side of the first gear transmission disc, the transmission block is inserted into the second transmission rod, and the second transmission gear structure is connected with the centrifugal flywheel.
6. The elongate insulated power fastening tool of claim 5,
the centrifugal flywheel comprises a rotating shaft and a flywheel body which are mutually connected and coaxial;
the rotating shaft is supported in the fastening installation shell through a bearing and is connected with the second transmission gear structure;
the flywheel body is C-shaped, a groove is formed in the inner surface of the flywheel body, the groove is connected with one end of the transmission shaft through a bearing, and an opening of the flywheel body is fixed with the periphery of the transmission shaft through the bearing;
and a wear-resistant shaft sleeve is fixed in the fastening installation shell and is fixed at the periphery of the transmission shaft.
7. The elongate insulated power fastening tool of claim 6,
the driving unit comprises a battery module, a control switch, a driving module and a speed reduction transmission module;
the battery module is arranged in the handheld main body, a charging hole corresponding to the battery module is formed in the outer side of the handheld main body, and the battery module is configured to be charged and discharged and used for supplying power to the driving module;
the drive module is arranged in the hand-held main body, the control switch is arranged on the outer surface of the hand-held main body and used for controlling the working state of the drive module, and the drive module is connected with the speed reduction transmission module;
the speed reduction transmission module is arranged in the hand-held main body and is connected with the transmission structure.
8. The elongate insulated power fastening tool of claim 7,
the driving module comprises a motor, and the control switch comprises a power switch and a positive and negative switch;
the power switch is used for controlling the conduction of the battery module and the motor, and the positive and negative switch is used for controlling the steering of the motor;
the driving unit further comprises a display screen, and the display screen is connected with the battery module and used for displaying the state of the battery module.
9. The elongate insulated power fastening tool of claim 8,
the speed reduction transmission module comprises a speed reduction gear, a transmission gear is arranged on an output shaft of the motor and meshed with the speed reduction gear, and the speed reduction gear is fixed at the end of the transmission structure.
10. The elongated insulated electric fastening tool of any one of claims 1 to 9,
the top of the hand-held body is provided with a holding groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120414381.3U CN214429094U (en) | 2021-02-25 | 2021-02-25 | Lengthened insulated electric fastening tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120414381.3U CN214429094U (en) | 2021-02-25 | 2021-02-25 | Lengthened insulated electric fastening tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214429094U true CN214429094U (en) | 2021-10-19 |
Family
ID=78071902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120414381.3U Active CN214429094U (en) | 2021-02-25 | 2021-02-25 | Lengthened insulated electric fastening tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214429094U (en) |
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2021
- 2021-02-25 CN CN202120414381.3U patent/CN214429094U/en active Active
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