CN217856428U - Anti-splashing stone crusher for safety production - Google Patents
Anti-splashing stone crusher for safety production Download PDFInfo
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- CN217856428U CN217856428U CN202222134885.7U CN202222134885U CN217856428U CN 217856428 U CN217856428 U CN 217856428U CN 202222134885 U CN202222134885 U CN 202222134885U CN 217856428 U CN217856428 U CN 217856428U
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Abstract
The application discloses a stone crusher for anti-splashing safety production, which relates to the field of concrete production and processing equipment and comprises a machine body, wherein a feeding hole is formed in the top end of the machine body, a first stone crushing roller and a second stone crushing roller which are used for crushing gravel are arranged in the machine body, a double-open type protective cover plate which is used for shielding and protecting the feeding hole and a guide assembly which is used for guiding the gravel to the protective cover plate are arranged at the feeding hole, the protective cover plate is movably connected in the machine body and positioned above the first stone crushing roller and the second stone crushing roller, and the guide assembly is positioned above the protective cover plate; the feeding port is also connected with a dust pumping assembly for pumping dust; this application can effectively shelter from the building stones in the breakage and the dust that produces among the crushing process for building stones is difficult to follow the feed inlet splash, and reduces simultaneously and gushes on the dust, has reduced a large amount of dust of stone crusher feed inlet department and has scattered and have the problem of rubble spill.
Description
Technical Field
The application relates to the field of concrete production and processing equipment, in particular to a splash-proof stone crusher for safety production.
Background
Concrete is generally artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones and chemical additives and mineral admixtures if necessary, uniformly stirring, densely forming, curing and hardening according to a proper proportion, and crushing or smashing broken stones by a stone crusher in the concrete processing production process.
In the related art, a chinese utility model patent document with an authorization publication No. CN210207009U discloses a stone crusher for gravel, which belongs to the technical field of concrete construction accessories, the stone crusher comprises a body, a support frame is arranged at the bottom end of the body, and a feed port is arranged at the top end of the body; a first stone crushing roller and a second stone crushing roller for crushing gravel are arranged in the machine body through bearing seats, a driving motor is arranged on the machine body, the output end of the driving motor is connected with the first stone crushing roller, one end of the first stone crushing roller, far away from the driving motor, extends to the outer side of the machine body and is provided with a driving gear, and one end of the second stone crushing roller, far away from the driving motor, extends to the outer side of the machine body and is provided with a driven gear in meshing transmission with the driving gear; the spiral feeding mechanism is arranged in the machine body and below the first gravel crushing roller, a mounting opening is formed in the bottom end of the machine body, and a screening net assembly used for distinguishing crushed gravel sizes and detachably connecting the crushed gravel sizes is arranged on the mounting opening. Above-mentioned stone crusher can sieve the coarse fodder grit and the fine material grit after smashing, has the effect of better crushing grit.
With respect to the related art in the above, the inventors found that: in the stone crushers in the related technology, as well as the common stone crushers such as the jaw stone crusher and the hammer stone crusher, in order to facilitate feeding, the feeding holes are generally arranged in an open manner, and in the process of crushing the crushed stones by the stone crushers, part of the crushed stones fly out of the feeding holes, so that personal injury is caused to constructors; meanwhile, a large amount of dust is generated in the broken stone crushing process, and the dust is easy to scatter from the feed inlet, so that dust pollution is caused, and the health of constructors is influenced.
SUMMERY OF THE UTILITY MODEL
In order to improve the lithotripter among the relevant art and have some rubble from the feed inlet splash and have the problem that a large amount of dust feed inlets fly apart when broken rubble, this application provides a prevent splashing for safety in production lithotripter.
The application provides a prevent splashing for safety in production stone crusher adopts following technical scheme:
a stone crusher for anti-splashing safety production comprises a crusher body, wherein a feeding hole is formed in the top end of the crusher body, a first stone crushing roller and a second stone crushing roller which are used for crushing gravel are arranged in the crusher body, a double-open type protective cover plate which is used for shielding and protecting the feeding hole and a material guide assembly which is used for guiding the gravel to the protective cover plate are arranged at the feeding hole, the protective cover plate is movably connected in the crusher body and is positioned above the first stone crushing roller and the second stone crushing roller, and the material guide assembly is positioned above the protective cover plate; the feeding port is also connected with a dust pumping assembly for pumping dust.
By adopting the technical scheme, in the process of crushing crushed stones, workers/feeding machinery can conduct stone materials to the protective cover plate through the material guide assembly; when stones are conducted to the protective cover plate, the protective cover plate can move in the machine body along with the stones, so that the stones naturally fall onto the first stone crushing roller and the second stone crushing roller under the action of gravity to crush the stones. In this in-process, the whole dust that produces to the building stones in the breakage and broken in-process of building stones of protective cover board and whereabouts has effectively sheltered from for the building stones are difficult to follow the feed inlet splash, and reduce simultaneously and kick on the dust, take out the dirt subassembly and also can suction the dust in feed inlet department, have reduced a large amount of dust scattering problems of feed inlet department effectively.
Optionally, the protective cover plate includes a left cover plate and a right cover plate, the left cover plate and the right cover plate are respectively arranged above the first gravel roller and the second gravel roller, a gap exists between the left cover plate and the right cover plate, one sides of the left cover plate and the right cover plate, which are far away from each other, are respectively hinged to two opposite side walls of the machine body, and two hinge axes are parallel to each other; and a reset piece used for enabling the left cover plate and the right cover plate to recover the parallel and level is arranged between the left cover plate and the machine body and between the right cover plate and the machine body in a matched manner.
By adopting the technical scheme, when the stone is transmitted to the left cover plate and the right cover plate through the material guide assembly, the stone can naturally press the left cover plate and the right cover plate downwards and fall onto the first stone crushing roller and the second stone crushing roller through the left cover plate and the right cover plate, so that the stone crushing is conveniently carried out; and at this in-process, the whole stone material that can upwards splash of left side apron, right side apron and whereabouts is sheltered from, has effectively improved the problem that the rubble splashes from feed inlet department.
Optionally, the reset piece is a torsion spring, and two wings of the torsion spring between the left cover plate/right cover plate and the machine body are respectively connected to the inner side walls of the left cover plate/right cover plate and the machine body.
By adopting the technical scheme, when the stone is transmitted to the left cover plate/the right cover plate through the material guide assembly, the left cover plate/the right cover plate has the trend of rotating downwards, the torsion spring is extruded/stretched under stress, and the stone is smoothly discharged; simultaneously, the torsional spring is lapped to left side/right side all the time and is applyed ascending resilience force for left side apron and right side apron can be when guaranteeing the smooth and easy whereabouts of building stones, and the building stones that relatively conveniently cooperate in the feeding effectively shelter from the feed inlet.
Optionally, the material guiding assembly comprises a left material guiding plate and a right material guiding plate, the left material guiding plate and the right material guiding plate are respectively located above the left cover plate and the right cover plate, the left material guiding plate and the right material guiding plate are fixed to each other, an included angle is formed between the left material guiding plate and the right material guiding plate, and the tip end of the included angle faces upwards.
Through adopting above-mentioned technical scheme, left stock guide and right stock guide can shunt the building stones comparatively conveniently, reduce the direct striking to left stock guide, right stock guide and garrulous stone roller of building stones, and simultaneously, left stock guide and right stock guide can further cover left side apron and right apron for the building stones are difficult for upwards splashing.
Optionally, a left adjusting part used for adjusting the distance between the left cover plate and the feed inlet and a right adjusting part used for adjusting the distance between the right cover plate and the feed inlet are respectively arranged below the left cover plate and the right cover plate, the left adjusting part and the right adjusting part are both installed on the machine body, and one end of the machine body is far away from by the left adjusting part and one end of the machine body is far away from by the right adjusting part are movably abutted to the left cover plate and the right cover plate respectively.
Through adopting above-mentioned technical scheme, adopt left regulating part and right regulating part to support left side apron and right side apron respectively to correspondingly control and adjust the distance between left side apron and the feed inlet and the distance between right side apron and the feed inlet, can carry out accurate control to the opening size between left side apron and the right side apron, reduce splashing and the effluvium of dust of rubble.
Optionally, elastic members are connected to the lower portions of the left cover plate, the right cover plate, the left material guide plate and the right material guide plate.
Through adopting above-mentioned technical scheme, the elastic component can protect left apron, right apron, left stock guide and right stock guide, alleviates the rubble that splashes and to the collision of above plate body, prolongs the holistic life of stone crusher.
Optionally, the left material guiding plate and the right material guiding plate are slidably connected to the machine body along a direction close to or far away from the first crushed stone roller/the second crushed stone roller, and a connecting part of the left material guiding plate and the right material guiding plate is provided with a thread locking piece for locking the sliding of the left material guiding plate and the right material guiding plate.
Through adopting above-mentioned technical scheme, screw thread locking piece and left stock guide and right stock guide cooperate, can make the distance between left stock guide and right stock guide and the left side apron/right side apron comparatively effectively adapt to the rubble of different particle sizes, and the guarantee building stones smoothly fall to shelter from the protection to the feed inlet.
Optionally, one side that left side apron and right side apron are close to mutually all protrudes and is equipped with and keeps off the material arch, keep off the protruding one side surface of keeping away from left side apron/right side apron and incline towards the organism is inside along the direction of keeping away from the feed inlet gradually.
Through adopting above-mentioned technical scheme, when the rubble upwards splashes, keep off the material arch and can intercept the rubble, further reduce the problem that the rubble splashes.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the protective cover plate, the material guide assembly and the dust extraction assembly are matched, so that stone materials in crushing and dust generated in the crushing process can be effectively shielded, the stone materials are not easy to splash out from a feed inlet, meanwhile, the dust upwelling is reduced, and the problem of scattering of a large amount of dust at the feed inlet is reduced;
2. by arranging the left adjusting piece and the right adjusting piece, the size of an inlet between the left cover plate and the right cover plate can be accurately adjusted and controlled, and the splashing of broken stones and the scattering of dust are further reduced;
3. through setting up and keeping off the material arch, can intercept the rubble that upwards splashes, further reduce the problem that the rubble splashes.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
fig. 2 is a partial structural view for showing the connection relationship between the internal components of the lithotripter body.
Reference numerals: 1. a body; 11. a left adjustment member; 12. a right adjustment member; 13. an observation window; 14. positioning holes; 2. crushing a stone roller I; 3. a second stone crushing roller; 4. a protective cover plate; 41. a left cover plate; 42. a right cover plate; 43. a torsion spring; 44. the material blocking bulge is arranged; 5. a material guiding assembly; 51. a left stock guide; 52. a right stock guide plate; 53. a flow distribution plate; 531. a locking hole; 54. a screw locking member; 6. a dust extractor; 7. an elastic pad.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses prevent stone crusher for safety in production that splashes relates to the field of concrete production processing equipment.
Referring to fig. 1 and 2, prevent splashing for safety in production stone crusher is including being suitable for the vertical organism 1 of placing on the horizontal plane, and the feed inlet has been seted up on 1 top of organism, is equipped with the rubble roller 2 and the rubble roller 3 that are used for smashing the grit in the organism 1, and feed inlet department is equipped with and is used for sheltering from the double open type of protection cover plate 4 of protection, is used for conducting the rubble to the guide subassembly 5 of protection cover plate 4 department and is used for carrying out the dust extraction subassembly of suction to the dust.
Specifically, referring to fig. 2, the first stone crushing roller 2 and the second stone crushing roller 3 are both located in the middle of the machine body 1, and the first stone crushing roller 2 and the second stone crushing roller 3 are symmetrically arranged along the center line of the machine body 1. The protective cover plate 4 comprises a left cover plate 41 and a right cover plate 42, the left cover plate 41 and the right cover plate 42 are respectively arranged above the first gravel roller 2 and the second gravel roller 3, the left cover plate 41 and the right cover plate 42 are also symmetrically arranged along the center line of the machine body 1, a gap exists between the left cover plate 41 and the right cover plate 42, one sides, far away from the left cover plate 41 and the right cover plate 42, are respectively hinged with two opposite side walls corresponding to the machine body 1, and the hinge axis between the left cover plate 41 and the machine body 1 is parallel to the hinge axis between the right cover plate 42 and the machine body 1; a restoring member for restoring the left cover plate 41 and the right cover plate 42 to be flush is further cooperatively arranged between the left cover plate 41 and the machine body 1 and between the right cover plate 42 and the machine body 1.
Referring to fig. 2, the restoring member is specifically a torsion spring 43, two wings of the torsion spring 43 may be disposed between the upper side of the left cover plate 41/the right cover plate 42 and the machine body 1, or between the lower side of the left cover plate 41/the right cover plate 42 and the machine body 1, and two wings of the torsion spring 43 are respectively welded to the left cover plate 41/the right cover plate 42 and the inner side wall of the machine body 1.
The material guiding assembly 5 specifically comprises a left material guiding plate 51 and a right material guiding plate 52, the left material guiding plate 51 and the right material guiding plate 52 are respectively located above the left cover plate 41 and the right cover plate 42, the left material guiding plate 51 and the right material guiding plate 52 are symmetrical and integrally connected with each other about the center line of the machine body 1, the left material guiding plate 51 and the right material guiding plate 52 are arranged in an obtuse angle, and the tip of the obtuse angle is upward; a vertical flow distribution plate 53 is arranged above the joint of the left material guide plate 51 and the right material guide plate 52, and the flow distribution plate 53 is fixedly connected with the left material guide plate 51 and the right material guide plate 52.
When stones are fed through the feeding hole and fall onto the left cover plate 41/the right cover plate 42, the stones press the left cover plate 41/the right cover plate 42, the left cover plate 41/the right cover plate 42 have a tendency of rotating downwards, and two wings of the torsion spring 43 are correspondingly stressed to be opened/stressed to be compressed, so that the stones can be fed smoothly; meanwhile, in the process, the torsion spring 43 always applies upward resilience to the left cover plate 41/the right cover plate 42 to drive the left cover plate 41 and the right cover plate 42 to be close to each other, so that the left cover plate 41, the right cover plate 42 and the falling stones can be matched with each other, and the broken stones and dust generated in the breaking process are effectively blocked while smooth falling of the stones is guaranteed.
Referring to fig. 1 and 2, the dust extraction assembly specifically includes a dust extractor 6 and a connecting pipe, the dust extractor 6 is fixedly mounted on the top of the machine body 1, one end of the connecting pipe is communicated with the air extraction end of the dust extractor 6, the other end of the connecting pipe is communicated with the inner cavity of the machine body 1, and the connecting positions of the connecting pipe and the machine body 1 are located above the left material guide plate 51 and the right material guide plate 52 and below the left cover plate 41 and the right cover plate 42; when dust generated by stone crushing gushes upwards from the left material guide plate 51 and the right material guide plate 52, the dust extractor 6 and the connecting pipe can suck the dust, so that the problem of dust scattering is solved.
Furthermore, elastic members are connected below the left stock guide plate 51, the right stock guide plate 52, the left cover plate 41 and the right cover plate 42, the elastic members are elastic pads 7 made of rubber in the embodiment of the application, and the elastic pads 7 are adhered to the left stock guide plate 51/the right stock guide plate 52/the left cover plate 41/the right cover plate 42 through viscose glue and are further connected and fixed with the plate bodies through anchor nails; in the process of crushing stones, the elastic cushion 7 can protect the left material guide plate 51, the right material guide plate 52, the left cover plate 41 and the right cover plate 42, reduce the collision of splashed crushed stones on the left material guide plate 51, the right material guide plate 52, the left cover plate 41 and the right cover plate 42, and prolong the service life of the whole stone crusher.
Referring to fig. 2, material blocking protrusions 44 are further convexly arranged on the sides, close to the left cover plate 41 and the right cover plate 42, of the left cover plate 41, the material blocking protrusions 44 are specifically long, and the length direction of the material blocking protrusions 44 is parallel to the hinge axis of the left cover plate 41; the material blocking bulges 44 on the left cover plate 41 and the right cover plate 42 are all provided with a plurality of material blocking bulges 44, the material blocking bulges 44 on the left cover plate 41/the right cover plate 42 are all uniformly distributed on the left cover plate 41/the right cover plate 42 along the surface of the left cover plate 41/the right cover plate 42, and one side surface of the material blocking bulge 44, which is far away from the left cover plate 41/the right cover plate 42, inclines towards the inside of the machine body 1 along the direction of gradually far away from the feed port.
When the broken stones splash upwards, the blocking bulge 44 can intercept the broken stones, and the problem of broken stone splashing is further reduced.
Referring to fig. 1 and 2, a left adjusting member 11 for adjusting the distance between the left cover plate 41 and the feed inlet and a right adjusting member 12 for adjusting the distance between the right cover plate 42 and the feed inlet are respectively arranged below the left cover plate 41 and the right cover plate 42, the left adjusting member 11 and the right adjusting member 12 are both threaded rod members, the left adjusting member 11 and the right adjusting member 12 respectively penetrate through two corresponding opposite side walls of the machine body 1 and are respectively in threaded connection with the two opposite side walls of the machine body 1, one end of the left adjusting member 11 extending into the machine body 1 is suitable for being movably abutted to the left cover plate 41, and one end of the right adjusting member 12 extending into the machine body 1 is suitable for being movably abutted to the right cover plate 42.
Further, in order to enable the gap between the left guide plate 51 and the left cover plate 41 and the gap between the right cover plate 42 and the right guide plate 52 to be suitable for stones with different particle sizes, the left guide plate 51, the right guide plate 52 and the flow dividing plate 53 are slidably connected to the machine body 1 along a direction close to or away from the stone crushing roller I2/stone crushing roller II 3, and a screw locking member 54 for locking the sliding of the left guide plate 51 and the right guide plate 52 is arranged at the connection position of the left guide plate 51 and the right guide plate 52.
Specifically, referring to fig. 1 and 2, the dividing plate 53 is suitable for being provided with a plurality of locking holes 531 at equal intervals along the vertical direction on two opposite side walls butted with the machine body 1, the side wall at the feed inlet at the top of the machine body 1 is provided with a positioning hole 14 suitable for being communicated with the locking holes 531 in a penetrating manner, the thread locking member 54 can be a threaded rod member such as a bolt, a screw rod or a screw, and the locking holes 531 are screw holes; the machine body 1 is further provided with an observation window 13 suitable for workers to observe the broken condition of stones in the inner cavity of the machine body 1, and the specific working conditions among the left material guide plate 51, the right material guide plate 52 and the right cover plate 42 can be observed through the observation window 13.
Therefore, the staff can adjust the distance between the left cover plate 41 and the right cover plate 42 and the feeding port by using the left adjusting part 11 and the right adjusting part 12 through the observation condition of the observation window 13, and fixedly connect the left material guide plate 51 and the right material guide plate 52 on the machine body 1 by using the thread locking part 54 to penetrate through the positioning hole 14 and be in thread fixation with the corresponding locking hole 531, so as to shield and protect the feeding port and ensure smooth stone discharging.
The implementation principle of the stone crusher for the anti-splashing safety production is as follows: in the process of crushing crushed stones, stones can be split into two parts by the splitter plate 53, the two parts of stones respectively fall onto the left cover plate 41 along the left guide plate 51 and fall onto the right cover plate 42 along the right guide plate 52 and correspondingly press the left cover plate 41 and the right cover plate 42, and fall onto the first crushed stone roller 2 and the second crushed stone roller 3 through the left cover plate 41 and the right cover plate 42 to be crushed, and the exhaust fan is positioned among the left cover plate 41, the right cover plate 42, the left guide plate 51 and the right guide plate 52 and sucks dust; whole stone material and the dust that produces among the crushing process in to being broken have carried out effective sheltering from for the stone material is difficult for following the feed inlet splash, and has reduced the dust simultaneously and has upwelled, has reduced a large amount of dust scattering and the stone material spill problem of feed inlet department effectively.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a prevent stone crusher for safety in production that splashes, includes organism (1), the feed inlet has been seted up on organism (1) top, be equipped with in organism (1) and be used for smashing gravel roller (2) and gravel roller two (3) of grit, its characterized in that: the feeding port is provided with a double-open type protective cover plate (4) for shielding and protecting the feeding port and a material guide assembly (5) for guiding broken stones to the protective cover plate (4), the protective cover plate (4) is movably connected in the machine body (1) and positioned above the first broken stone roller (2) and the second broken stone roller (3), and the material guide assembly (5) is positioned above the protective cover plate (4); the feeding port is also connected with a dust pumping assembly for pumping dust.
2. The rock crusher for splash-proof safety production as recited in claim 1, characterized in that: the protective cover plate (4) comprises a left cover plate (41) and a right cover plate (42), the left cover plate (41) and the right cover plate (42) are respectively arranged above the gravel roller I (2) and the gravel roller II (3), a gap is formed between the left cover plate (41) and the right cover plate (42), one sides, far away from the left cover plate (41) and the right cover plate (42), of the left cover plate and the right cover plate are respectively hinged with two opposite side walls of the machine body (1), and two hinge axes are parallel to each other; and a resetting piece used for enabling the left cover plate (41) and the right cover plate (42) to be leveled is further arranged between the left cover plate (41) and the machine body (1) and between the right cover plate (42) and the machine body (1) in a matching manner.
3. The rock crusher for splash-proof safety production as recited in claim 2, characterized in that: the reset piece is a torsion spring (43), and two wings of the torsion spring (43) positioned between the left cover plate (41)/the right cover plate (42) and the machine body (1) are respectively connected to the inner side walls of the left cover plate (41)/the right cover plate (42) and the machine body (1).
4. The splash-proof rock crusher for safety production according to any one of claims 2 to 3, characterized in that: the material guiding assembly (5) comprises a left material guiding plate (51) and a right material guiding plate (52), the left material guiding plate (51) and the right material guiding plate (52) are respectively located above a left cover plate (41) and a right cover plate (42) and are mutually fixed, an included angle is formed between the left material guiding plate (51) and the right material guiding plate (52) in a distributed mode, and the tip end of the included angle faces upwards.
5. The rock crusher for splash-proof safety production as recited in claim 2, characterized in that: left side apron (41) and right side apron (42) below are provided with respectively and are used for adjusting left regulating part (11) of distance between left side apron (41) and the feed inlet and are used for adjusting right regulating part (12) of distance between right side apron (42) and the feed inlet, left side regulating part (11) and right regulating part (12) are all installed on organism (1), just organism (1) is kept away from in left side regulating part (11) one end and right regulating part (12) one end of keeping away from organism (1) respectively with left side apron (41) and right side apron (42) activity butt.
6. The rock crusher for splash-proof safety production as recited in claim 4, characterized in that: elastic pieces are connected below the left cover plate (41), the right cover plate (42), the left material guide plate (51) and the right material guide plate (52).
7. The rock crusher for splash-proof safety production as recited in claim 4, wherein: the left material guide plate (51) and the right material guide plate (52) are connected to the machine body (1) in a sliding mode along the direction close to or far away from the first gravel roller (2)/the second gravel roller (3), and a thread locking piece (54) used for locking the sliding of the left material guide plate (51) and the right material guide plate (52) is arranged at the connecting position of the left material guide plate (51) and the right material guide plate (52).
8. The rock crusher for splash-proof safety production as recited in claim 2, characterized in that: left side apron (41) and right side apron (42) one side that is close to mutually all the protrusion be equipped with keep off protruding (44), keep off protruding (44) one side surface of keeping away from left side apron (41)/right side apron (42) along the direction of keeping away from the feed inlet gradually towards organism (1) inside slope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222134885.7U CN217856428U (en) | 2022-08-11 | 2022-08-11 | Anti-splashing stone crusher for safety production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222134885.7U CN217856428U (en) | 2022-08-11 | 2022-08-11 | Anti-splashing stone crusher for safety production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217856428U true CN217856428U (en) | 2022-11-22 |
Family
ID=84077142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222134885.7U Active CN217856428U (en) | 2022-08-11 | 2022-08-11 | Anti-splashing stone crusher for safety production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217856428U (en) |
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2022
- 2022-08-11 CN CN202222134885.7U patent/CN217856428U/en active Active
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