CN217059574U - Road engineering detects uses road bed substrate check out test set - Google Patents
Road engineering detects uses road bed substrate check out test set Download PDFInfo
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- CN217059574U CN217059574U CN202220213629.4U CN202220213629U CN217059574U CN 217059574 U CN217059574 U CN 217059574U CN 202220213629 U CN202220213629 U CN 202220213629U CN 217059574 U CN217059574 U CN 217059574U
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Abstract
The utility model relates to a roadbed base material detection technical field, in particular to a roadbed base material detection device for road engineering detection; comprises a shell, a strip shell, a pushing cylinder, a compaction mechanism and a rotating mechanism; the top end of the shell is fixedly connected with a supporting plate, the middle part of the left side of the supporting plate is provided with a strip-shaped hole, the shell is arranged in the strip-shaped hole, and the shell is in sliding connection with the strip-shaped hole; the top end of the shell is fixedly connected with a square plate, the rotating mechanism is arranged on the square plate, and the top end of the rotating mechanism is fixedly connected with a compaction cylinder; the bottom of the strip-shaped shell is fixedly connected to the right side of the shell, the pushing cylinder is fixedly connected to the bottom of the strip-shaped shell, and a piston of the pushing cylinder is fixedly connected with the right side wall of the shell; the top end of the strip-shaped shell is fixedly connected with a top shell, and the compaction mechanism is arranged in the middle of the top shell; the utility model provides a staff's clearance when hitting a real section of thick bamboo, hit the closely knit hard of soil sample in the real section of thick bamboo, the more difficult problem of staff's clearance.
Description
Technical Field
The application relates to the technical field of roadbed base material detection, and particularly discloses roadbed base material detection equipment for road engineering detection.
Background
The subgrade base material comprises materials such as cement, soil for a road base layer and the like, and the backfill earthwork density must be ensured to reach the maximum value in the road backfill project; before the layered backfill treatment, the optimal state of the soil sample is detected, and a compaction test is carried out on the soil sample used for the engineering; in the compaction test, a compaction cylinder is put in a soil sample, then a hammer is used for compacting the soil sample, the wet density is calculated according to the volume of the compaction cylinder and the total weight of compacted soil in the cylinder, and further the dry density is calculated; the impact hammer in the existing experimental equipment tamps the soil sample in the tamping barrel, after the experiment is completed, when workers clean the tamping barrel, the soil sample in the tamping barrel is dense and hard, and the workers are difficult to clean.
In view of the above, the present invention provides a roadbed substrate detection device for road engineering detection, so as to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a road engineering detects uses roadbed substrate check out test set to when solving the staff clearance and hit a real section of thick bamboo, hit the closely knit hard of soil sample in the real section of thick bamboo, the staff clears up the problem of comparative difficulty.
In order to achieve the above object, the basic scheme of the utility model provides a road bed substrate detection device for road engineering detection, which comprises a shell, a strip-shaped shell, a pushing cylinder, a compaction mechanism and a rotating mechanism; the top end of the shell is fixedly connected with a supporting plate, the middle part of the left side of the supporting plate is provided with a strip-shaped hole, the shell is arranged in the strip-shaped hole, and the shell is in sliding connection with the strip-shaped hole; the bottom end of the shell is fixedly connected with a sliding block, the middle part of the bottom surface in the shell is fixedly connected with a guide rail, and the sliding block is connected with the guide rail in a sliding manner; the top end of the shell is fixedly connected with a square plate, the rotating mechanism is arranged on the square plate, and the top end of the rotating mechanism is fixedly connected with a compaction cylinder; the bottom of the strip-shaped shell is fixedly connected to the right side of the shell, the pushing cylinder is fixedly connected to the bottom of the strip-shaped shell, and a piston of the pushing cylinder is fixedly connected with the right side wall of the shell; the top end of the strip-shaped shell is fixedly connected with a top shell, and the compaction mechanism is arranged in the middle of the top shell.
By adopting the technical scheme, the method has the advantages that: when a worker puts a soil sample into the compaction cylinder and the detection equipment works, the pushing cylinder pushes the shell outwards along the guide rail; the rotating mechanism drives the compaction cylinder to rotate, and the compaction mechanism acts to hammer the soil sample in the compaction cylinder; the pushing cylinder pulls the shell back along the guide rail towards the inner side, and the compaction mechanism can uniformly hammer the soil sample in the compaction cylinder; after the soil sample in the compaction cylinder is compacted, a worker takes down the measured data of the compaction cylinder, after the data is recorded, the worker puts the compaction cylinder back to the rotating mechanism, the rotating mechanism moves upwards, the rotating mechanism can push the soil sample in the compaction cylinder out of the compaction cylinder, and the cleaning is simple and convenient; the problem of when the staff cleared up and hit a real section of thick bamboo, hit the closely knit hard of soil sample in a real section of thick bamboo, the staff clearance is more difficult is solved.
Further, the rotating mechanism comprises a positioning shell, a cleaning cylinder, a rotating motor and a baffle plate; a round hole is formed in the left side of the square plate, and the positioning shell is rotatably connected in the round hole; the baffle is fixedly connected to the bottom end of the positioning shell, and the bottom end of the positioning shell is radially and fixedly connected with a gear ring; a vertical plate is vertically arranged in the bottom of the right side of the positioning shell, the rotating motor is fixedly connected to the vertical plate, a gear is connected to the upper key of the rotating motor shaft, and the gear is meshed with the gear ring; the middle part of the top surface of the baffle is fixedly connected with a cleaning cylinder which is arranged in the positioning shell; a through hole is formed in the middle of the top end of the positioning shell, the cleaning cylinder piston is arranged in the through hole, supporting columns are arranged on two sides of the top end of the positioning shell, external threads are arranged on the tops of the supporting columns, and the compaction cylinder is fixedly connected to the supporting columns.
By adopting the technical scheme, the device has the advantages that: when the rotating mechanism works, the rotating motor rotates, the gear is meshed with the gear ring, and the gear drives the positioning shell to rotate in the round hole; the compaction cylinder is fixedly connected to the support column, and the compaction cylinder rotates when the positioning shell rotates; the compacting cylinder has a larger diameter, and when the compacting cylinder rotates, the compacting mechanism can uniformly hammer the soil sample in the compacting cylinder; after the worker takes down the compaction cylinder to measure data, the compaction cylinder is fixedly connected to the supporting column, the cleaning cylinder acts, and the cleaning cylinder piston can act upwards to eject out the compact soil sample in the compaction cylinder.
Further, the device also comprises a backing plate; the bottom of the compaction cylinder is provided with a communicating hole, and the backing plate is arranged at the bottom of the inner side of the compaction cylinder; the bottom of the outer side of the compaction cylinder is provided with a circular ring, the middle part of the outer side of the compaction cylinder is provided with a round platform, and two sides of the circular ring and the round platform are provided with fixing holes; the compaction cylinder is arranged at the top end of the positioning shell, the communication hole is aligned to the through hole, and the cleaning cylinder piston is abutted against the backing plate; the support column sets up in the fixed orifices, and threaded connection has the nut after the fixed orifices on the round platform is passed on the support column top, and the nut supports the round platform.
By adopting the technical scheme, the device has the advantages that: the soil sample is placed in a space formed by the upper part of the base plate and the compaction cylinder; when the compaction barrel is cleaned, the cleaning air cylinder acts, a cleaning air cylinder piston upwards props against the backing plate, the cleaning air cylinder piston upwards drives the backing plate to move, and a compact soil sample above the backing plate is ejected out of the compaction barrel; the nut props against the round table, and the compaction cylinder is fixedly connected onto the positioning shell through the nut.
Furthermore, the compaction mechanism comprises a hammer, an incomplete gear and a driving motor; a rectangular plate is fixedly connected to the inner bottom surface of the middle part of the top shell, a driving motor is fixedly connected to the rectangular plate, and a driving motor shaft penetrates through the rectangular plate to be connected with the incomplete gear key; a square hole is formed in the middle of the top shell, a sliding rod is arranged at the top of the driving hammer and is in sliding connection with the square hole, a transmission gear is arranged on the right side of the top of the sliding rod, and the incomplete gear is meshed with the transmission gear; the hammer is aligned with the compaction cylinder.
By adopting the technical scheme, the device has the advantages that: when the compaction mechanism acts, the driving motor rotates, and the driving motor shaft drives the incomplete gear to rotate; the incomplete gear is meshed with the transmission gear, when the incomplete gear rotates, the sliding rod is driven to do intermittent motion, and the driving hammer hammers the soil sample in the compaction cylinder.
Further, a cylinder body hole is formed in the bottom of the strip-shaped shell, the pushing cylinder is fixedly connected in the cylinder body hole, and the pushing cylinder piston is arranged in the middle of the right side wall of the shell; the bottom and the right end of the right side of the top shell are fixedly connected with the strip-shaped shell.
By adopting the technical scheme, the device has the advantages that: the cylinder body hole provides a fixed connection space for pushing the cylinder; the bottom of the right side of the top shell and the right end of the top shell are fixedly connected with the strip-shaped shell, and a space on the left side of the top shell is reserved for installing a compaction mechanism.
Furthermore, the diameter of the communication hole is the same as that of the through hole, and two sides of the left side of the strip-shaped hole are in a semicircular arc shape; the section of the shell is circular.
By adopting the technical scheme, the method has the advantages that: the diameter of the communicating hole is the same as that of the through hole, so that the piston of the cleaning cylinder can move up and down conveniently; the two sides of the left side of the strip-shaped hole are in a semicircular arc shape, namely, the two sides of the left side of the strip-shaped hole are matched with the circular shell, and the collision of sharp edges and corners is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram illustrating a roadbed base material detection device for road engineering detection according to an embodiment of the present application;
FIG. 2 shows a cross-sectional view taken along the plane A-A of FIG. 1;
FIG. 3 shows a cross-sectional view taken along the plane B-B in FIG. 1;
fig. 4 shows a cross-sectional view through plane C-C of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. 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.
The following is further detailed by the specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a shell 1, a strip-shaped shell 2, a top shell 3, a pushing cylinder 4, a guide rail 5, a sliding block 6, a shell 7, a rotating motor 8, a gear 9, a gear ring 10, a baffle plate 11, a cleaning cylinder 12, a positioning shell 13, a support pillar 14, a nut 15, a compacting cylinder 16, a circular truncated cone 17, a hammer 18, a sliding rod 19, an incomplete gear 20, a rectangular plate 21, a driving motor 22, a base plate 23, a support plate 24, a strip-shaped hole 2401, a square plate 25 and a vertical plate 26.
An embodiment of a roadbed base material detection device for road engineering detection is shown in figures 1-4 as follows,
the utility model discloses a concrete implementation process:
as shown in fig. 1 and 2: comprises a shell 1, a shell 7, a strip-shaped shell 2, a pushing cylinder 4, a compaction mechanism and a rotating mechanism; the top end of the shell 1 is fixedly connected with a support plate 24, the middle part of the left side of the support plate 24 is provided with a strip-shaped hole 2401, the shell 7 is arranged in the strip-shaped hole 2401, and the shell 7 is connected with the strip-shaped hole 2401 in a sliding manner; the bottom end of the shell 7 is fixedly connected with a sliding block 6, the middle part of the inner bottom surface of the shell 1 is fixedly connected with a guide rail 5, and the sliding block 6 is in sliding connection with the guide rail 5; the top end of the shell 7 is fixedly connected with a square plate 25, the rotating mechanism is arranged on the square plate 25, and the top end of the rotating mechanism is fixedly connected with a compaction cylinder 16; the bottom of the strip-shaped shell 2 is fixedly connected to the right side of the shell 1, the pushing cylinder 4 is fixedly connected to the bottom of the strip-shaped shell 2, and a piston of the pushing cylinder 4 is fixedly connected with the right side wall of the shell 7; the top end of the strip-shaped shell 2 is fixedly connected with a top shell 3, and the compaction mechanism is arranged in the middle of the top shell 3.
By adopting the technical scheme, the method has the advantages that: when a worker puts a soil sample into the compaction cylinder 16 and the detection equipment works, the pushing cylinder 4 pushes the shell 7 outwards along the guide rail 5; the rotating mechanism drives the compaction cylinder 16 to rotate, and the compaction mechanism acts to hammer the soil sample in the compaction cylinder 16; the pushing cylinder 4 pulls the shell 7 back inwards along the guide rail 5, and the compaction mechanism can uniformly hammer the soil sample in the compaction cylinder 16; after the soil sample in the compaction cylinder 16 is compacted, a worker takes down the measured data of the compaction cylinder 16, after the data is recorded, the worker puts the compaction cylinder 16 back to the rotating mechanism, the rotating mechanism moves upwards, the rotating mechanism can push the soil sample in the compaction cylinder 16 out of the compaction cylinder 16, and the cleaning is simple and convenient; the problem of when the staff cleared up and hit solid section of thick bamboo 16, hit closely knit hard of the soil sample in solid section of thick bamboo 16, the staff clearance is more difficult is solved.
The rotating mechanism comprises a positioning shell 13, a cleaning air cylinder 12, a rotating motor 8 and a baffle plate 11; the rotating motor 8 is a horizontal motor with a speed reduction function; a round hole is formed in the left side of the square plate 25, and the positioning shell 13 is rotatably connected in the round hole; the baffle 11 is fixedly connected to the bottom end of the positioning shell 13, and the bottom end of the positioning shell 13 is radially and fixedly connected with the gear ring 10; a vertical plate 26 is vertically arranged in the bottom of the right side of the positioning shell 13, the rotating motor 8 is fixedly connected to the vertical plate 26, a gear 9 is connected to the shaft of the rotating motor in a key mode, and the gear 9 is meshed with the gear ring 10; the middle part of the top surface of the baffle plate 11 is fixedly connected with a cleaning cylinder 12, and the cleaning cylinder 12 is arranged in a positioning shell 13; a through hole is formed in the middle of the top end of the positioning shell 13, a piston of the cleaning air cylinder 12 is arranged in the through hole, supporting columns 14 are arranged on two sides of the top end of the positioning shell 13, external threads are arranged at the tops of the supporting columns 14, and the compaction cylinder 16 is fixedly connected to the supporting columns 14.
By adopting the technical scheme, the method has the advantages that: when the rotating mechanism works, the rotating motor 8 rotates, the gear 9 is meshed with the gear ring 10, and the gear 9 drives the positioning shell 13 to rotate in the circular hole; the compaction cylinder 16 is fixedly connected to the supporting column 14, and the compaction cylinder 16 rotates when the positioning shell 13 rotates; the compacting cylinder 16 has a larger diameter, and when the compacting cylinder 16 rotates, the compacting mechanism can uniformly hammer the soil sample in the compacting cylinder 16; after the worker takes down the compaction cylinder 16 and measures the data, the compaction cylinder 16 is fixedly connected to the supporting column 14, the cleaning cylinder 12 acts, and the piston of the cleaning cylinder 12 can act upwards to eject the compact soil sample in the compaction cylinder 16.
Further comprises a backing plate 23; the bottom of the compaction cylinder 16 is provided with a communicating hole, and the backing plate 23 is arranged at the bottom of the inner side of the compaction cylinder 16; a circular ring is arranged at the bottom of the outer side of the compaction barrel 16, a circular platform 17 is arranged in the middle of the outer side of the compaction barrel 16, and fixing holes are formed in the two sides of the circular ring and the circular platform 17; the compaction cylinder 16 is arranged at the top end of the positioning shell 13, the communication hole is aligned with the through hole, and the piston of the cleaning air cylinder 12 is abutted against the backing plate 23; in the support column 14 set up the fixed orifices, threaded connection has nut 15 behind the fixed orifices on round platform 17 is passed on the support column 14 top, and nut 15 supports round platform 17.
By adopting the technical scheme, the method has the advantages that: the soil sample is placed in a space formed between the upper part of the backing plate 23 and the compaction cylinder 16; when the compaction cylinder 16 is cleaned, the cleaning cylinder 12 acts, the piston of the cleaning cylinder 12 upwards props against the backing plate 23, the piston of the cleaning cylinder 12 upwards drives the backing plate 23 to move, and a compact soil sample above the backing plate 23 is ejected out of the compaction cylinder 16; the nut 15 abuts against the circular truncated cone 17, and the compaction cylinder 16 is fixedly connected to the positioning shell 13 through the nut 15.
As shown in fig. 1 and 3: the compaction mechanism comprises a hammer 18, an incomplete gear 20 and a driving motor 22; the driving motor 22 is a vertical motor with speed reduction; a rectangular plate 21 is fixedly connected to the inner bottom surface of the middle part of the top shell 3, a driving motor 22 is fixedly connected to the rectangular plate 21, and a driving motor shaft penetrates through the rectangular plate 21 to be in key connection with the incomplete gear 20; a square hole is formed in the middle of the top shell 3, a sliding rod 19 is arranged at the top of the driving hammer 18, the sliding rod 19 is connected with the square hole in a sliding mode, a transmission gear is arranged on the right side of the top of the sliding rod 19, and the incomplete gear 20 is meshed with the transmission gear; the hammer 18 is aligned with the impact cylinder 16.
By adopting the technical scheme, the method has the advantages that: when the compaction mechanism acts, the driving motor 22 rotates, and the driving motor shaft drives the incomplete gear 20 to rotate; the incomplete gear 20 is meshed with the transmission gear, when the incomplete gear 20 rotates, the sliding rod 19 is driven to do intermittent motion, and the hammer 18 hammers the soil sample in the compaction cylinder 16.
As shown in fig. 1: a cylinder body hole is formed in the bottom of the strip-shaped shell 2, the pushing cylinder 4 is fixedly connected in the cylinder body hole, and a piston of the pushing cylinder 4 is arranged in the middle of the right side wall of the shell 7; the bottom and the right end of the right side of the top shell 3 are fixedly connected with the strip-shaped shell 2.
By adopting the technical scheme, the method has the advantages that: the cylinder body hole provides a fixed connection space for pushing the cylinder 4; the bottom and the right end of the right side of the top shell 3 are fixedly connected with the strip-shaped shell 2, and the space on the left side of the top shell 3 is reserved for installing a compaction mechanism.
As shown in fig. 1 and 4: the diameter of the communicating hole is the same as that of the through hole, and the two sides of the left side of the strip-shaped hole 2401 are in a semicircular arc shape; the housing 7 is circular in cross-section.
By adopting the technical scheme, the method has the advantages that: the diameter of the communicating hole is the same as that of the through hole, so that the piston of the cleaning air cylinder 12 can move up and down conveniently; the two sides of the left side of the strip-shaped hole 2401 are in a semicircular arc shape, namely, the strip-shaped hole is matched with the circular shell 7, so that the collision of sharp edges and corners is avoided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (6)
1. The utility model provides a road engineering detects uses road bed substrate check out test set which characterized in that: comprises a shell, a strip shell, a pushing cylinder, a compaction mechanism and a rotating mechanism; the top end of the shell is fixedly connected with a supporting plate, the middle part of the left side of the supporting plate is provided with a strip-shaped hole, the shell is arranged in the strip-shaped hole, and the shell is in sliding connection with the strip-shaped hole; the bottom end of the shell is fixedly connected with a sliding block, the middle part of the bottom surface in the shell is fixedly connected with a guide rail, and the sliding block is connected with the guide rail in a sliding manner; the top end of the shell is fixedly connected with a square plate, the rotating mechanism is arranged on the square plate, and the top end of the rotating mechanism is fixedly connected with a compaction cylinder; the bottom of the strip-shaped shell is fixedly connected to the right side of the shell, the pushing cylinder is fixedly connected to the bottom of the strip-shaped shell, and a piston of the pushing cylinder is fixedly connected with the right side wall of the shell; the top end of the strip-shaped shell is fixedly connected with a top shell, and the compaction mechanism is arranged in the middle of the top shell.
2. The roadbed base material detection device for road engineering detection as claimed in claim 1, wherein the roadbed base material detection device comprises: the rotating mechanism comprises a positioning shell, a cleaning cylinder, a rotating motor and a baffle plate; a round hole is formed in the left side of the square plate, and the positioning shell is rotatably connected in the round hole; the baffle is fixedly connected to the bottom end of the positioning shell, and the bottom end of the positioning shell is radially and fixedly connected with a gear ring; a vertical plate is vertically arranged in the bottom of the right side of the positioning shell, the rotating motor is fixedly connected to the vertical plate, a gear is connected to the upper key of the rotating motor shaft, and the gear is meshed with the gear ring; the middle part of the top surface of the baffle is fixedly connected with a cleaning air cylinder which is arranged in the positioning shell; a through hole is formed in the middle of the top end of the positioning shell, the cleaning cylinder piston is arranged in the through hole, supporting columns are arranged on two sides of the top end of the positioning shell, external threads are arranged on the tops of the supporting columns, and the compaction cylinder is fixedly connected to the supporting columns.
3. The roadbed substrate detection equipment for road engineering detection, according to claim 2, is characterized in that: the device also comprises a backing plate; the bottom of the compaction cylinder is provided with a communicating hole, and the backing plate is arranged at the bottom of the inner side of the compaction cylinder; the bottom of the outer side of the compaction cylinder is provided with a circular ring, the middle part of the outer side of the compaction cylinder is provided with a round platform, and two sides of the circular ring and the round platform are provided with fixing holes; the compaction cylinder is arranged at the top end of the positioning shell, the communication hole is aligned to the through hole, and the cleaning cylinder piston is abutted against the backing plate; the support column sets up in the fixed orifices, and threaded connection has the nut after the fixed orifices on the round platform is passed on the support column top, and the nut supports the round platform.
4. The roadbed substrate detection equipment for road engineering detection, according to claim 3, is characterized in that: the compaction mechanism comprises a hammer, an incomplete gear and a driving motor; a rectangular plate is fixedly connected to the inner bottom surface of the middle part of the top shell, a driving motor is fixedly connected to the rectangular plate, and a driving motor shaft penetrates through the rectangular plate to be connected with the incomplete gear key; a square hole is formed in the middle of the top shell, a sliding rod is arranged at the top of the driving hammer and is in sliding connection with the square hole, a transmission gear is arranged on the right side of the top of the sliding rod, and the incomplete gear is meshed with the transmission gear; the hammer is aligned with the compaction cylinder.
5. The roadbed substrate detection equipment for road engineering detection, according to claim 4, is characterized in that: a cylinder body hole is formed in the bottom of the strip-shaped shell, the pushing cylinder is fixedly connected in the cylinder body hole, and a piston of the pushing cylinder is arranged in the middle of the right side wall of the shell; the bottom of the right side of the top shell and the right end of the right side of the top shell are fixedly connected with the strip-shaped shell.
6. The roadbed base material detection device for road engineering detection as claimed in claim 5, wherein the roadbed base material detection device comprises: the diameter of the communicating hole is the same as that of the through hole, and the two sides of the left side of the strip-shaped hole are in a semicircular arc shape; the section of the shell is circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220213629.4U CN217059574U (en) | 2022-01-26 | 2022-01-26 | Road engineering detects uses road bed substrate check out test set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220213629.4U CN217059574U (en) | 2022-01-26 | 2022-01-26 | Road engineering detects uses road bed substrate check out test set |
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| Publication Number | Publication Date |
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| CN217059574U true CN217059574U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220213629.4U Active CN217059574U (en) | 2022-01-26 | 2022-01-26 | Road engineering detects uses road bed substrate check out test set |
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| Country | Link |
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| CN (1) | CN217059574U (en) |
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2022
- 2022-01-26 CN CN202220213629.4U patent/CN217059574U/en active Active
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