CN212126826U - Material successive layer lifting device - Google Patents
Material successive layer lifting device Download PDFInfo
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- CN212126826U CN212126826U CN201922241993.2U CN201922241993U CN212126826U CN 212126826 U CN212126826 U CN 212126826U CN 201922241993 U CN201922241993 U CN 201922241993U CN 212126826 U CN212126826 U CN 212126826U
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Abstract
A material layer-by-layer lifting apparatus comprising: the device comprises a material collecting hopper, a first group of shoveling and conveying mechanisms, a second group of shoveling and conveying mechanisms, a driving device, a fixed supporting frame and a material discharging mechanism; the material collecting hopper is positioned at the lower part and used for receiving materials to be lifted to the high part; the material collecting hopper is arranged below the first group of shoveling and conveying mechanisms and the second group of shoveling and conveying mechanisms; the first group of shoveling and conveying mechanisms and the second group of shoveling and conveying mechanisms are driven by the driving device to carry out reciprocating circular motion, so that the materials are lifted from the material collecting hopper to the high positions layer by layer; the fixed support frame is used for fixedly supporting the material collecting hopper and the driving device. The utility model discloses area is few, installation space is little, reduce hot-blast leakage, simple structure, stability is strong, the power consumption is little.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of material conveying equipment, especially, relate to a material successive layer hoisting device.
[ background of the invention ]
After the sludge dewatering machine dewaters the sludge or the dewatered sludge cake is dried by the sludge drying machine, the produced materials fall to the lower part. The materials can be conveyed to a high place only by the material conveying device, so that the materials can be collected or further conveyed conveniently.
The material lifting device in the prior art comprises an inclined spiral conveyor, a pipe chain conveying device and the like. The prior art has the following defects: 1. in order to lift the materials to a certain height, a larger and higher installation space needs to be reserved at the discharge port for installing the lifting and conveying device, and the occupied area is large. 2. The rear end of the sludge drier is easy to leak hot air. 3. A relatively large power driving motor is required. 4. Wear of the screw shaft or the pipe chain device easily occurs.
[ Utility model ] content
The utility model aims to solve the technical problem that a material successive layer hoisting device that area is little is provided.
The utility model discloses a realize like this:
a material layer-by-layer lifting apparatus comprising: the device comprises a material collecting hopper, a first group of shoveling and conveying mechanisms, a second group of shoveling and conveying mechanisms, a driving device, a fixed supporting frame and a material discharging mechanism;
the material collecting hopper is positioned at the lower part and used for receiving materials to be lifted to the high part;
the first group of shoveling and conveying mechanisms and the second group of shoveling and conveying mechanisms are driven by the driving device to carry out reciprocating circular motion, so that the materials are lifted from the material collecting hopper to the high positions layer by layer;
the fixed support frame is used for fixedly supporting the material collecting hopper and the driving device;
the first set of scooping mechanisms comprising: the scraper comprises a group of first guide plates positioned on two sides, and a plurality of first scraper plates positioned between the two first guide plates and arranged at intervals from top to bottom; two side edges of the first scraping plates are respectively and fixedly connected with the first guide plates; the arrangement of the positions of the first scraping plates is a first oblique line which is oblique to the direction opposite to the scraping direction of the scraping plates from bottom to top;
the second set of scooping mechanisms comprising: the second scraper conveyer comprises a group of second guide plates positioned on two sides and a plurality of second scraper conveyer plates positioned between the two second guide plates and arranged at intervals from top to bottom; the two second guide plates are arranged between the two first guide plates; the second scooping panel includes: a material shoveling part and a supporting part; the front end of the supporting part of each second scraping plate is connected with the scraping part, and two side edges of the tail end of the supporting part of each second scraping plate are respectively and fixedly connected with the second guide plate; the positions of the second scraping plates are arranged from bottom to top to form a second oblique line which is oblique in the direction opposite to the scraping direction of the scraping plates; the second oblique line is parallel to the first oblique line;
the group of first guide plates and the group of second guide plates are also respectively connected with the driving device; the driving device drives the group of first guide plates and the group of second guide plates to do reciprocating circular motion, and then drives the first group of shoveling and conveying mechanisms and the second group of shoveling and conveying mechanisms to do reciprocating circular motion, so that materials are alternately lifted layer by layer from the material collecting hopper at a lower position to a higher position through the second shoveling and conveying plates and the first shoveling plates and are discharged from the material discharge mechanism;
the material collecting hopper is arranged below the first group of shoveling and conveying plates and the second group of shoveling and conveying plates;
when the second shoveling and transporting plate at the bottommost part moves downwards and in the shoveling direction, shovels materials from the material collecting bucket, and moves to the highest point, the first shoveling and transporting plate above the second shoveling and transporting plate at the bottommost part just moves to the lowest point, and shovels away the materials on the second shoveling and transporting plate at the bottommost part; when the first shoveling and transporting plate moves to the highest point, the second shoveling and transporting plate above the first shoveling and transporting plate just moves to the lowest point, and shovels away materials on the first shoveling and transporting plate; when the second scraping plate moves to the highest point, the first scraping plate above the second scraping plate just moves to the lowest point, and the materials on the second scraping plate are scraped; by parity of reasoning, the materials are lifted to the high position layer by layer from the low position; the shoveling and conveying plate at the highest position is a material pushing plate, and materials on the shoveling and conveying plate at the highest position are pushed to the material discharging mechanism to be discharged;
and the material discharging mechanism is used for receiving the material pushed out by the material pushing plate.
Further, the driving device includes: a group of guide plate driving central shafts, a group of first eccentric devices, a group of second eccentric devices and a driving mechanism;
the group of guide plate driving central shafts comprises two or more guide plate driving central shafts;
the number and the positions of the group of first eccentric devices are uniformly distributed and arranged on the group of first guide plates;
the number and the positions of the group of second eccentric devices are uniformly distributed and arranged on the group of second guide plates;
each guide plate driving central shaft sequentially penetrates through a first eccentric device on the first guide plate, a second eccentric device on the second guide plate and a first eccentric device on the first guide plate, wherein the first eccentric devices are positioned on one side of the first guide plate, the second eccentric devices are positioned on the other side of the second guide plate, and the first eccentric devices are positioned on the first guide plate;
the rotating speeds of the group of first eccentric devices and the group of second eccentric devices are the same, the eccentric distances are the same, and the eccentric directions are opposite;
the set of guide plate drive center shafts are connected to the drive mechanism.
Further, the drive mechanism includes: a transmission central shaft and a driving motor;
a group of gear redirectors are arranged on the transmission central shaft;
the drive center shaft is connected to the set of guide plate drive center shafts through the set of gear diverters;
the transmission central shaft is connected with the driving motor.
Further, the device also comprises a feeding mechanism;
the feeding mechanism comprises: a U-shaped groove and a screw shaft;
the spiral shaft is arranged in the U-shaped groove; the tail end of the U-shaped groove is provided with the material collecting hopper;
the transmission central shaft is positioned below the U-shaped groove, and the transmission central shaft is meshed with the screw shaft through a gear set;
the driving motor is connected with the screw shaft or the transmission central shaft;
the driving motor drives the screw shaft to feed materials in a rotating manner, and the screw shaft drives the transmission central shaft to rotate through the gear set; or the driving motor drives the transmission central shaft to rotate, and the transmission central shaft drives the screw shaft to feed materials in a rotating manner through the gear set;
the transmission central shaft drives the group of guide plates to drive the central shaft to rotate through the group of gear redirectors, and the group of guide plates drive the central shaft to drive the first group of shoveling and conveying mechanisms and the second group of shoveling and conveying mechanisms to do reciprocating circular motion through the group of first eccentric devices and the group of second eccentric devices.
Furthermore, a first torsion spring is arranged between one end of the material collecting hopper and the fixed support frame; the material collecting hopper is upward tilted relative to the horizontal plane;
when the shoveling and transporting plate at the bottommost part moves to the lowest point, the material collecting hopper is pressed into a horizontal shape, then the shoveling and transporting plate shovels materials on the material collecting hopper to move upwards to leave the material collecting hopper, and the material collecting hopper is restored under the action of the first torsion spring.
Further, the material discharge mechanism includes: a first bearing part and a second bearing part; an angle is formed between the first bearing part and the second bearing part, and the first bearing part and the second bearing part can completely bear materials pushed out by the material pushing plate from the shoveling plate; a second torsion spring is arranged at the connecting part of the first bearing part and the second bearing part;
the second bearing part is fixedly connected to the fixed support frame;
when the shoveling plate touches the first bearing part in the shoveling process, the first bearing part rotates around the second bearing part under the action of the second torsion spring, so that the abdicating function is realized;
when the shoveling plate moves upwards to leave the first bearing part, the first bearing part restores to the original state under the action of the second torsion spring to bear the material pushed out by the material pushing plate.
The utility model has the advantages that: 1. greatly reducing the occupied area and the installation space. 2. The rear end of the sludge drier can reduce the leakage of hot air. 3. The power consumption is small. 4. Simple structure and strong stability.
[ description of the drawings ]
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a first scooping mechanism of the present invention.
Fig. 2 is a schematic structural view of the second scooping mechanism of the present invention.
Fig. 3 to 6 are schematic diagrams of the movement routes of the first scooping plate and the second scooping plate in the present invention.
Fig. 7 is a schematic diagram of the partially exploded structure of the present invention.
Fig. 8 is a schematic structural diagram of the present invention.
[ detailed description ] embodiments
As shown in fig. 1 to 8, a material layer-by-layer lifting device includes: the device comprises a feeding mechanism 1, a material collecting hopper 2, a first group of shoveling and conveying mechanisms 3, a second group of shoveling and conveying mechanisms 4, a driving device, a fixed support frame 6 and a material discharging mechanism.
Feeding mechanism 1 includes: a U-shaped groove 11 and a screw shaft 12.
The screw shaft 12 is arranged in the U-shaped groove 11; the tail end of the U-shaped groove 11 is provided with a material collecting bucket 2. The material in the U-shaped groove 11 is fed by the rotation of the screw shaft 12 and finally reaches the material collecting hopper 2.
The U-shaped groove 11, the screw shaft 12, and the driving means are provided on the fixed support frame 6.
The first group of shoveling and transporting mechanisms 3 and the second group of shoveling and transporting mechanisms 4 are connected with the driving device, the first group of shoveling and transporting mechanisms 3 and the second group of shoveling and transporting mechanisms 4 do reciprocating circular motion under the action of the driving device, and materials in the material collecting bucket 2 located at the lower position are alternately lifted to the high position layer by layer.
A first set of scooping mechanisms 3 comprising: a group of first guide plates 31 positioned at both sides, and a plurality of first scooping plates 32 positioned between the two first guide plates 31 and spaced apart from top to bottom; two side edges of the first scraping plates 32 are respectively and fixedly connected with the first guide plates 31; the arrangement of the positions of the first scooping plates 32 is a first oblique line 100 inclined in the direction opposite to the scooping direction of the scooping plates from bottom to top, that is: in the present embodiment, the plurality of first guide plates 31 move clockwise and move leftward to scoop materials when they are located at a low position, and the plurality of first scooping plates 32 are arranged in an array of first oblique lines 100 inclined rightward from bottom to top.
A second set of scooping mechanisms 4 comprising: a group of second guide plates 41 located at both sides, and a plurality of second scooping plates 42 located between the two second guide plates 41 and spaced apart from top to bottom; the two second guide plates 41 are located between the two first guide plates 31. Each second scraper plate 42 includes: a scooping portion 421 and a supporting portion 422; the front end of the supporting part 422 of each second scraping plate 42 is connected with the scraping part 421, the tail end thereof is connected with a surrounding plate 43, and two side edges of the tail end thereof are respectively fixedly connected with the second guide plate 41; a first oblique line 200 that is inclined rightward from below and is arranged at the position of the plurality of second scooping plates 42; the second oblique line 200 is parallel to the first oblique line 100.
A drive device, comprising: two guide plate drive center shafts 51, four first eccentrics 52, four second eccentrics 53, two gear diverters 54, and one drive center shaft 55.
The four first eccentric devices 52 are respectively installed on the first guide plates 31 located on two sides in pairs, and the two guide plate driving central shafts 51 penetrate through the corresponding first eccentric devices 52 on the two first guide plates 31;
the four second eccentric devices 53 are respectively installed on the second guide plates 41 on two sides in pairs, and the two guide plate driving central shafts 51 penetrate through the corresponding second eccentric devices 53 on the two second guide plates 41;
the two guide plate driving center shafts 51 are connected to a driving center shaft 55 through two gear diverters 54, respectively, and the driving center shaft 55 and the screw shaft 12 are engaged with each other through a gear train 56.
In this embodiment, the driving center shaft 55 is connected to a motor (not shown), the screw shaft 12 receives power from the driving center shaft 55 to perform a rotating motion, and the driving center shaft 55 simultaneously drives the two guide plates to drive the center shaft 51 to rotate, so as to drive the first group of scooping mechanisms 3 and the second group of scooping mechanisms 4 to perform a reciprocating circular motion.
In particular practice, the two guide plate drive central shafts 51 may also be directly driven by a motor without necessarily providing a transmission central shaft 55 to take power therefrom; alternatively, it may be: the motor is directly connected to the screw shaft 12, the screw shaft 12 drives the driving center shaft 55, and the two guide plate driving center shafts 51 take power from the driving center shaft 55 through the two gear diverters 54.
As shown in fig. 3 to 6, the material collection bucket 2 is disposed below the second scraper plate 42 at the lowermost portion. When the second shoveling and transporting plate 42 at the bottommost moves to the lowest point, shoveling the materials from the material collecting bucket 2, and when the second shoveling and transporting plate moves to the highest point, the first shoveling and transporting plate 32 above the second shoveling and transporting plate 42 at the bottommost just moves to the lowest point, and shoveling the materials on the second shoveling and transporting plate 42 at the bottommost; when the first scraper blade 32 moves to the highest point, the second scraper blade 42 located above the first scraper blade 32 just moves to the lowest point to scrape the materials on the first scraper blade 32; when the second scraping plate 42 moves to the highest point, the first scraping plate 32 above the second scraping plate 42 just moves to the lowest point, and the materials on the second scraping plate 42 are scraped; by parity of reasoning, the materials are lifted to the high position layer by layer from the low position; the first scraper plate 32 at the highest position is a material pushing plate 321, and the material on the second scraper plate 42 at the highest position is pushed to the material discharging mechanism to be discharged; and the material discharging mechanism is used for receiving the material pushed out by the material pushing plate 321.
A first torsion spring 8 is arranged between one end of the material collecting hopper 2 and the fixed support frame 6; the material collecting hopper 2 is upward tilted relative to the horizontal plane.
When the scraper plate at the bottommost part moves to the lowest point, the material collecting hopper 2 is pressed into a horizontal shape, then the material on the material collecting hopper 2 is shoveled to move upwards to leave the material collecting hopper 2, and the material collecting hopper 2 is restored under the action of the first torsion spring 8.
Material discharge mechanism includes: a first receiving portion 71 and a second receiving portion 72; the first receiving portion 71 and the second receiving portion 72 have an angle therebetween, and are capable of completely receiving the material pushed out from the scraper blade by the pusher plate 321, and a second torsion spring 9 is provided at a connecting portion of the first receiving portion 71 and the second receiving portion 72.
The first receiving portion 71 is close to the material pushing plate 321 and is used for receiving the material pushed by the material pushing plate 321;
the second bearing part 72 is inclined downwards for discharging; the bottom of the second receiving portion 72 is fixedly connected to the fixed support frame 6. The material discharge mechanism and the fixed support frame 6 play a role in enclosing materials.
When the first scooping plate 32 and the second scooping plate 42 touch the first receiving portion 71 during the movement process, the first receiving portion 71 rotates around the second receiving portion 72 under the action of the second torsion spring 9, so that the abdicating function is achieved.
When the scraping plate moves upward and leaves the first receiving portion 71, the first receiving portion 71 recovers to the original shape under the action of the second torsion spring 9, and receives the material pushed out by the material pushing plate 321.
The utility model discloses material successive layer promotes device's working process:
materials are conveyed to the material collecting hopper 2 from the feeding mechanism 1, when the second shoveling plate 42 positioned at the bottommost part moves to the lowest point, the material collecting hopper 2 is pressed into a horizontal shape, then the materials on the material collecting hopper 2 are shoveled to move upwards to leave the material collecting hopper 2, and the material collecting hopper 2 is restored under the action of the second torsion spring 9; along with the reciprocating circular motion of the first scraping plate 32 and the second scraping plate 42, the material is lifted to the second scraping plate 42 at the highest position layer by layer, and when the second scraping plate 42 at the highest position moves to the highest position, the material is pushed to the first receiving part 71 of the material discharging mechanism by the material pushing plate 321 and then falls to the second receiving part 72 to be discharged.
The utility model discloses area is few, installation space is little, reduce hot-blast leakage, simple structure, stability is strong, the power consumption is little.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a material successive layer hoisting device which characterized in that:
the method comprises the following steps: the device comprises a material collecting hopper, a first group of shoveling and conveying mechanisms, a second group of shoveling and conveying mechanisms, a driving device, a fixed supporting frame and a material discharging mechanism;
the material collecting hopper is positioned at the lower part and used for receiving materials to be lifted to the high part;
the first group of shoveling and conveying mechanisms and the second group of shoveling and conveying mechanisms are driven by the driving device to carry out reciprocating circular motion, so that the materials are lifted from the material collecting hopper to the high positions layer by layer;
the fixed support frame is used for fixedly supporting the material collecting hopper and the driving device;
the first set of scooping mechanisms comprising: the scraper comprises a group of first guide plates positioned on two sides, and a plurality of first scraper plates positioned between the two first guide plates and arranged at intervals from top to bottom; two side edges of the first scraping plates are respectively and fixedly connected with the first guide plates; the arrangement of the positions of the first scraping plates is a first oblique line which is oblique in the direction opposite to the scraping direction of the scraping plates from bottom to top;
the second set of scooping mechanisms comprising: the second scraper conveyer comprises a group of second guide plates positioned on two sides and a plurality of second scraper conveyer plates positioned between the two second guide plates and arranged at intervals from top to bottom; the two second guide plates are arranged between the two first guide plates; the second scooping panel includes: a material shoveling part and a supporting part; the front end of the supporting part of each second scraping plate is connected with the scraping part, and two side edges of the tail end of the supporting part of each second scraping plate are respectively and fixedly connected with the second guide plate; the positions of the second scraping plates are arranged from bottom to top to form a second oblique line which is oblique in the direction opposite to the scraping direction of the scraping plates; the second oblique line is parallel to the first oblique line;
the group of first guide plates and the group of second guide plates are also respectively connected with the driving device; the driving device drives the group of first guide plates and the group of second guide plates to do reciprocating circular motion, and then drives the first group of shoveling and conveying mechanisms and the second group of shoveling and conveying mechanisms to do reciprocating circular motion, so that materials are alternately lifted layer by layer from the material collecting hopper at a lower position to a higher position through the second shoveling and conveying plates and the first shoveling plates and are discharged from the material discharge mechanism;
the material collecting hopper is arranged below the first shoveling plate and the second shoveling plate;
when the second shoveling and transporting plate at the bottommost part moves downwards and in the shoveling direction, shovels materials from the material collecting bucket, and moves to the highest point, the first shoveling and transporting plate above the second shoveling and transporting plate at the bottommost part just moves to the lowest point, and shovels away the materials on the second shoveling and transporting plate at the bottommost part; when the first shoveling and transporting plate moves to the highest point, the second shoveling and transporting plate above the first shoveling and transporting plate just moves to the lowest point, and shovels away materials on the first shoveling and transporting plate; when the second scraping plate moves to the highest point, the first scraping plate above the second scraping plate just moves to the lowest point, and the materials on the second scraping plate are scraped; by parity of reasoning, the materials are lifted to the high position layer by layer from the low position; the shoveling and conveying plate at the highest position is a material pushing plate, and materials on the shoveling and conveying plate at the highest position are pushed to the material discharging mechanism to be discharged;
and the material discharging mechanism is used for receiving the material pushed out by the material pushing plate.
2. A material layer-by-layer lifting device as recited in claim 1, wherein: the driving device includes: a group of guide plate driving central shafts, a group of first eccentric devices, a group of second eccentric devices and a driving mechanism;
the group of guide plate driving central shafts comprises two or more guide plate driving central shafts;
the number and the positions of the first eccentric devices are uniformly arranged on the first guide plates;
the number and the positions of the second eccentric devices are uniformly arranged on the second guide plates;
each guide plate driving central shaft sequentially penetrates through a first eccentric device on the first guide plate, a second eccentric device on the second guide plate and a first eccentric device on the first guide plate, wherein the first eccentric devices are positioned on one side of the first guide plate, the second eccentric devices are positioned on the other side of the second guide plate, and the first eccentric devices are positioned on the first guide plate;
the rotating speeds of the group of first eccentric devices and the group of second eccentric devices are the same, the eccentric distances are the same, and the eccentric directions are opposite;
the set of guide plate drive center shafts are connected to the drive mechanism.
3. A material layer-by-layer lifting device as recited in claim 2, wherein: the drive mechanism includes: a transmission central shaft and a driving motor;
a group of gear redirectors are arranged on the transmission central shaft;
the drive center shaft is connected to the set of guide plate drive center shafts through the set of gear diverters;
the transmission central shaft is connected with the driving motor.
4. A material layer-by-layer lifting device as recited in claim 3, wherein: the device also comprises a feeding mechanism;
the feeding mechanism comprises: a U-shaped groove and a screw shaft;
the spiral shaft is arranged in the U-shaped groove; the tail end of the U-shaped groove is provided with the material collecting hopper;
the transmission central shaft is positioned below the U-shaped groove, and the transmission central shaft is meshed with the screw shaft through a gear set;
the driving motor is connected with the screw shaft or the transmission central shaft;
the driving motor drives the screw shaft to feed materials in a rotating manner, and the screw shaft drives the transmission central shaft to rotate through the gear set; or the driving motor drives the transmission central shaft to rotate, and the transmission central shaft drives the screw shaft to feed materials in a rotating manner through the gear set;
the transmission central shaft drives the group of guide plates to drive the central shaft to rotate through the group of gear redirectors, and the group of guide plates drive the central shaft to drive the first group of shoveling and conveying mechanisms and the second group of shoveling and conveying mechanisms to do reciprocating circular motion through the group of first eccentric devices and the group of second eccentric devices.
5. A material layer-by-layer lifting device as claimed in any one of claims 1 to 4, wherein:
a first torsion spring is arranged between one end of the material collecting hopper and the fixed support frame; the material collecting hopper is upward tilted relative to the horizontal plane;
when the shoveling and transporting plate at the bottommost part moves to the lowest point, the material collecting hopper is pressed into a horizontal shape, then the shoveling and transporting plate shovels materials on the material collecting hopper to move upwards to leave the material collecting hopper, and the material collecting hopper is restored under the action of the first torsion spring.
6. A material layer-by-layer lifting device as recited in claim 1, wherein:
the material discharge mechanism includes: a first bearing part and a second bearing part; an angle is formed between the first bearing part and the second bearing part, and the first bearing part and the second bearing part can completely bear materials pushed out by the material pushing plate from the shoveling plate; a second torsion spring is arranged at the connecting part of the first bearing part and the second bearing part;
the second bearing part is fixedly connected to the fixed support frame;
when the shoveling plate touches the first bearing part in the shoveling process, the first bearing part rotates around the second bearing part under the action of the second torsion spring, so that the abdicating function is realized;
when the shoveling plate moves upwards to leave the first bearing part, the first bearing part restores to the original state under the action of the second torsion spring to bear the material pushed out by the material pushing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922241993.2U CN212126826U (en) | 2019-12-13 | 2019-12-13 | Material successive layer lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922241993.2U CN212126826U (en) | 2019-12-13 | 2019-12-13 | Material successive layer lifting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212126826U true CN212126826U (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922241993.2U Active CN212126826U (en) | 2019-12-13 | 2019-12-13 | Material successive layer lifting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212126826U (en) |
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2019
- 2019-12-13 CN CN201922241993.2U patent/CN212126826U/en active Active
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