CN215957209U - Comb-tooth reel type pineapple harvesting machine - Google Patents
Comb-tooth reel type pineapple harvesting machine Download PDFInfo
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- CN215957209U CN215957209U CN202122139611.2U CN202122139611U CN215957209U CN 215957209 U CN215957209 U CN 215957209U CN 202122139611 U CN202122139611 U CN 202122139611U CN 215957209 U CN215957209 U CN 215957209U
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- fruit collecting
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Abstract
A tropical fruit harvesting machine, in particular to a comb-tooth reel type pineapple harvesting machine, and belongs to the technical field of agricultural machinery. The utility model solves the problem of low mechanization degree of pineapple harvesting in the prior art. The conveying device is fixedly connected with the fruit collecting vehicle in the highland crack and arranged on one side of the harvesting main body, the shaftless comb tooth seedling pulling wheel is controlled to rotate in the circumferential direction through the first motor, the sliding plate and the supporting comb teeth are fixedly arranged inside the shaftless comb tooth seedling pulling wheel through the rack, the sliding plate is obliquely arranged above the supporting comb teeth, one end of the conveying device is communicated with the fruit collecting vehicle in the highland crack, the other end of the conveying device is arranged below the low end of the sliding plate, in the advancing process of the fruit collecting vehicle in the highland crack, the supporting comb teeth pull pineapples in the advancing direction, the shaftless comb tooth seedling pulling wheel rotates in the circumferential direction to pick pineapples, the picked pineapples are thrown onto the sliding plate along with the circumferential rotation of the shaftless comb tooth seedling pulling wheel, and the pineapples fall into the conveying device in the oblique direction of the sliding plate and are conveyed into the fruit collecting vehicle in the highland crack through the conveying device.
Description
Technical Field
The utility model relates to a tropical fruit harvesting machine, in particular to a comb-tooth reel type pineapple harvesting machine, and belongs to the technical field of agricultural machinery.
Background
The unique characteristics and use value of the pineapples are more and more popular, so that the rapid development of the pineapple planting and related additional industries is promoted. Increasing demand has prompted the growing production area of pineapples. However, the picking season of the pineapples is not long, the pineapples are generally harvested only in a harvesting period of about one and a half months, the planting area is wide, the yield is relatively high, and the problems and the tests are brought to the picking and harvesting of the pineapples. The picking of the pineapples is mainly carried out manually at present, mechanical auxiliary equipment can be used in parts of places, and the labor cost required in the whole picking operation period can account for 40 percent of the production profit of the pineapples. In the case of an increasing lack of labour, fruit growers wish to be able to have some difficulty, mainly because: firstly, pineapples belong to shrub species, branches and leaves growing on mother plants are flourishing and have strong toughness, the space of mechanical movement can be shielded, picking operation is difficult, the pineapples are just in the fruit maturation period during picking, most of mechanical picking belongs to violent picking, and the pineapples are easily damaged; finally, the picking period of the pineapple is short, and once the optimal period is missed, the pineapple is rotten in the field, so that the harvest and the yield of the pineapple are seriously influenced. Therefore, the development of pineapple harvesting related equipment has important strategic development significance for solving the problems of relieving labor shortage, reducing labor intensity, improving harvesting production efficiency, harvesting conveying efficiency and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem of low mechanization degree of pineapple harvesting in the prior art, and further provides a comb-tooth reel type pineapple harvesting machine.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a comb-tooth reel type pineapple harvesting machine comprises a high-ground-clearance fruit collecting vehicle, a frame, a conveying device, a first motor and a harvesting main body, wherein the conveying device is fixedly connected with the high-ground-clearance fruit collecting vehicle and arranged on one side of the harvesting main body, the harvesting main body comprises a shaftless comb-tooth reel, a sliding plate and supporting comb teeth, the first motor is fixedly arranged behind the high-ground-clearance fruit collecting vehicle and controls the shaftless comb-tooth reel to rotate circumferentially through the first motor, the sliding plate and the supporting comb teeth are fixedly arranged inside the shaftless comb-tooth reel through the frame, the sliding plate is obliquely arranged above the supporting comb teeth, one end of the conveying device is communicated with the high-ground-clearance fruit collecting vehicle, the other end of the conveying device is lower than the low end of the sliding plate, the supporting comb teeth pull pineapples in the advancing direction during the advancing process of the high-ground-clearance fruit collecting vehicle, the shaftless comb-tooth reel rotates circumferentially to harvest pineapples, the picked pineapples are thrown to the sliding plate along with the circumferential rotation of the shaftless comb-tooth stalk pulling wheel, fall into the conveying device along the inclined direction of the sliding plate and are conveyed into the high-ground-clearance fruit collecting vehicle through the conveying device.
Furthermore, the shaftless comb-tooth reel comprises two coaxially arranged frame rings, a plurality of support rods connected between the two frame rings, and a group of tangential comb teeth and a group of radial comb teeth arranged on each support rod, wherein one frame ring is fixedly arranged at the output end of the first motor, and each group of tangential comb teeth are arranged tangentially along the rotation direction of the frame ring.
Furthermore, the supporting comb teeth comprise a comb tooth frame and a row of J-shaped comb teeth integrally and fixedly arranged at the bottom end of the comb tooth frame, and the J-shaped comb teeth are back to back arranged on the fruit collection vehicle with high clearance.
Furthermore, the first motor and the transmission device are respectively arranged at two sides of the shaftless comb-tooth reel.
Further, the fruit collecting vehicle in the high clearance comprises a fruit collecting box and at least two first travelling wheels which support and drive the fruit collecting box to move.
Furthermore, the front end of the fruit collecting vehicle in the high clearance is connected to the rear end of the tractor through a traction frame.
Furthermore, conveyer is U type band conveyer, and it includes the second motor, the protective housing, two first belt pulleys, two second belt pulleys, four third belt pulleys and a plurality of belt, wherein the one end of protective housing clamps in the upper portion of collecting the fruit car in the highland crack, the other end is fixed in the frame, first belt pulley and second belt pulley are arranged in the protective housing and are close to the one end of slide, the third belt pulley is arranged in the protective housing and is close to the one end of collecting the fruit car in the highland crack, two second belt pulleys are arranged between two first belt pulleys, and the diameter of two second belt pulleys is less than the diameter of two first belt pulleys, two second belt pulleys correspond four third belt pulleys of connection through the belt respectively, four third belt pulleys pass through the coaxial drive of second motor.
Furthermore, the top end of one side wall of the sliding plate, which is far away from the fruit collecting vehicle in the high ground clearance, and the top end of one side wall of one end, which is far away from the conveying device, are fixedly provided with baffles respectively, and the baffles are all arranged obliquely to the sliding plate.
Furthermore, four harvesting main bodies are correspondingly provided with two first motors and three transmission devices, wherein the two first motors and the three transmission devices are arranged at intervals, each two adjacent harvesting main bodies are correspondingly driven by one first motor, and the three transmission devices are correspondingly positioned on one side of each harvesting main body, which is far away from the first motor.
Furthermore, a second running wheel is arranged below each of the two first motors, and each second running wheel is rotatably mounted on the machine frame.
Compared with the prior art, the utility model has the following effects:
in the advancing process, the supporting comb teeth comb pineapple plants, pineapple branches and leaves smoothly pass through the supporting comb teeth, the supporting comb teeth pull the pineapples firstly, the pineapples are bent through acting force on the pineapples, and subsequent picking is facilitated. The pineapple tree species belongs to the genus of shrubs, branches and leaves growing on the parent plant are flourishing and strong in toughness, and the comb-tooth type reel wheels are adopted to comb and brush the branches and leaves of the pineapples, so that the branches and leaves of the pineapples are prevented from influencing the operation of the machine when the pineapples are picked.
Gather in the highland crack fruit car rear and arrange a harvesting main part and can realize the harvesting of at least one line, also can select to arrange two or more harvesting main parts in the highland crack fruit car rear according to actual need, adopt the planting mode of big ridge double row according to the pineapple, but this application once only gathers the multirow. The whole harvesting process is driven by a motor, and the pineapple harvesting process is automated under the control of a driver's electric button. Through the pineapple harvesting machine, the whole-course mechanical harvesting of pineapples can be realized, and the harvesting efficiency is high. Compared with manual harvesting, the pineapple harvesting efficiency is improved by about 300%.
Drawings
Fig. 1 is a first perspective view of the present application;
FIG. 2 is a second perspective view of the present application;
FIG. 3 is a schematic rear view of the present application;
FIG. 4 is a schematic side view of the present application;
FIG. 5 is a schematic perspective view of a shaftless comb-tooth reel;
FIG. 6 is a schematic perspective view of the supporting comb teeth;
FIG. 7 is a perspective view of the conveyor;
FIG. 8 is a perspective view of the slide plate;
fig. 9 is a schematic diagram of the process of harvesting pineapples by the harvesting body.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 9, a comb-teeth reel type pineapple harvesting machine, which includes a high-clearance fruit collecting vehicle 1, a frame 2, a conveying device 3, a first motor 4 and a harvesting main body 5, wherein the conveying device 3 is fixedly connected with the high-clearance fruit collecting vehicle 1 and is arranged on one side of the harvesting main body 5, the harvesting main body 5 includes a shaftless comb-teeth reel 51, a sliding plate 52 and supporting comb teeth 53, the first motor 4 is fixedly arranged at the rear of the high-clearance fruit collecting vehicle 1, the shaftless comb-teeth reel 51 is controlled by the first motor 4 to rotate circumferentially, the sliding plate 52 and the supporting comb teeth 53 are fixedly arranged inside the shaftless comb-teeth reel 51 through the frame 2, the sliding plate 52 is obliquely arranged above the supporting comb teeth 53, one end of the conveying device 3 is communicated with the high-clearance fruit collecting vehicle 1, and the other end is arranged lower than the low end of the sliding plate 52, in the advancing process of the fruit collecting vehicle 1 in the high ground clearance, the supporting comb teeth 53 pull pineapples in the advancing direction, the shaftless comb tooth stalk pulling wheel 51 circumferentially rotates to pick pineapples, the picked pineapples are thrown onto the sliding plate 52 along with the circumferential rotation of the shaftless comb tooth stalk pulling wheel 51, and the pineapples fall into the conveying device 3 along the inclined direction of the sliding plate 52 and are conveyed into the fruit collecting vehicle 1 in the high ground clearance through the conveying device 3.
The conveyor 3 is preferably a U-belt conveyor. The picked pineapples fall onto the slide plate 52 and then roll onto the U-shaped belt conveyor.
When the fruit collecting vehicle 1 is in the forward state in the high clearance, the rotation direction of the shaftless comb-tooth reel 51 is clockwise. The pineapple is picked by the shaftless comb-tooth reel through rotation.
In the advancing process, the supporting comb teeth 53 comb and brush pineapple plants, pineapple branches and leaves smoothly pass through the supporting comb teeth 53, the supporting comb teeth 53 pull the pineapples firstly, and the pineapples are bent by acting force on the pineapples, so that subsequent picking is facilitated. The pineapple tree species belongs to the genus of shrubs, branches and leaves growing on the parent plant are flourishing and strong in toughness, and the comb-tooth type reel wheels are adopted to comb and brush the branches and leaves of the pineapples, so that the branches and leaves of the pineapples are prevented from influencing the operation of the machine when the pineapples are picked.
Gather in the highland crack fruit car 1 rear and arrange a harvesting main part 5 and can realize the harvesting of at least one line, also can select to arrange two or more harvesting main parts 5 in the highland crack fruit car 1 rear according to actual need, adopt the planting mode of big ridge double row according to the pineapple, but this application once only gathers the multirow. The whole harvesting process is driven by a motor, and the pineapple harvesting process is automated under the control of a driver's electric button. Through the pineapple harvesting machine, the whole-course mechanical harvesting of pineapples can be realized, and the harvesting efficiency is high. Compared with manual harvesting, the pineapple harvesting efficiency is improved by about 300%.
For example, when one harvesting body 5 can achieve two-row harvesting and the number of harvesting bodies 5 is two, four rows of pineapples can be harvested at one time; when one harvesting main body 5 can realize two-row harvesting and the number of the harvesting main bodies 5 is four, eight rows of pineapples can be harvested at one time.
Preferably, two adjacent harvesting bodies share a first motor, or each harvesting body may share a motor.
The pineapple harvesting work is completed by the cooperation of the shaftless comb-tooth reel and the supporting comb teeth. The shaftless comb-tooth reel and the supporting comb teeth both adopt a comb-tooth structure, so that the damage to pineapple leaves is reduced in the picking process.
The sliding plate 52 is a groove-shaped structure with one end sealed and is formed by welding 2mm steel plates.
The whole size of the pineapple harvester is 4800mm multiplied by 3500mm multiplied by 1500mm in length multiplied by width multiplied by height.
The shaftless comb-tooth reel 51 comprises two frame rings 511 which are coaxially arranged, a plurality of support rods 512 connected between the two frame rings 511, and a group of tangential comb teeth 513 and a group of radial comb teeth 514 which are arranged on each support rod 512, wherein one frame ring 511 is fixedly arranged at the output end of the first motor 4, and each group of tangential comb teeth 513 are tangentially arranged along the rotating direction of the frame ring 511. The two frame rings 511 and the support rods 512 together form a cylindrical structure with a diameter of 1000mm and a length of 700 mm. The support rods 512 are uniformly distributed along the circumferential direction of the frame ring 511. The number of the support rods 512 is preferably six. The pitch of the radial comb teeth 514 is 65mm, the tooth length is 100mm, and the number of the teeth is 10; the pitch of the tangential comb teeth 513 is 65mm, the tooth length is 150mm, and the number of teeth is 10.
The first motor 4 rotates the frame ring 511, which in turn rotates the tangential comb teeth 513 and the radial comb teeth 514. Pineapples enter the interior of the reel from the space between the two rows of tangential comb teeth 513 and are picked by the radial comb teeth 514.
The supporting comb teeth 53 comprise a comb tooth frame 531 and a row of J-shaped comb teeth 532 integrally and fixedly arranged at the bottom end of the comb tooth frame 531, and the J-shaped comb teeth 532 are arranged back to back in a high-clearance manner on the fruit collecting vehicle 1. The outer arc surface of the lower part of the J-shaped comb teeth 532 is contacted with the pineapples in the advancing process of the high-gap fruit collecting vehicle 1, and the pineapples are prevented from being damaged in the process of pulling the pineapples. According to actual conditions, one row of J-shaped comb teeth 532 fixedly mounted at the bottom end of the comb rack 531 can be divided into two groups, a gap exists between the two groups of J-shaped comb teeth 532, each group of J-shaped comb teeth 532 corresponds to one row of pineapples, and manufacturing cost of the supporting comb teeth 53 is effectively saved. Preferably, the number of the comb teeth in each group of J-shaped comb teeth 532 is eight, the distance between every two adjacent comb teeth is 25mm, and each comb tooth is formed by bending a steel pipe with the diameter of 10 mm. The space between the two groups of comb teeth is 135 mm.
The first motor 4 and the transmission device 3 are respectively arranged at two sides of the shaftless comb-tooth reel 51.
The fruit collecting vehicle 1 in the high ground clearance comprises a fruit collecting box 11 and at least two first travelling wheels 12 for supporting and driving the fruit collecting box to move. And a high ground clearance tire is adopted to ensure that the bottom of the fruit collecting box 11 is higher than pineapple plants. The size of the fruit collecting box 11 is 4400mm multiplied by 1000mm multiplied by 800mm multiplied by length multiplied by width multiplied by height, and the fruit collecting box is formed by cutting and welding steel plates.
The front end of the fruit collecting vehicle 1 in the high clearance is connected to the rear end of the tractor through a traction frame 6. In the harvesting operation, the tractor is used for traction and walking.
The conveying device 3 is a U-shaped belt conveyor, which comprises a second motor 31, a protective shell 32, two first belt pulleys 33, two second belt pulleys 34, four third belt pulleys 35 and a plurality of belts, wherein one end of the protective shell 32 is clamped at the upper part of the fruit collecting vehicle 1 in the highland, the other end is fixedly arranged on the machine frame 2, the first belt pulley 33 and the second belt pulley 34 are arranged at one end of the protective shell 32 close to the sliding plate 52, the third belt pulley 35 is arranged at one end of the protective shell 32 close to the fruit collecting vehicle 1 in the highland, the two second belt pulleys 34 are arranged between the two first belt pulleys 33, the diameters of the two second belt pulleys 34 are smaller than the diameters of the two first belt pulleys 33, the two first belt pulleys 33 and the two second belt pulleys 34 are respectively and correspondingly connected with four third belt pulleys 35 through belts 36, and the four third belt pulleys 35 are coaxially driven through the second motor 31. Due to the design, the first belt pulley 33 and the second belt pulley 34 are different in diameter and are coaxially arranged, and form a U shape, so that the belt close to one end of the sliding plate 52 is arranged in a groove shape, and has a certain wrapping effect on the pineapples, and the pineapples can be conveniently conveyed. When the pineapples roll off the slide plate 52, the pineapples are effectively prevented from falling outside the machine. The third belt pulley 35 is driven to rotate by the second motor 31, so as to drive the belt to move. The second motor 31 is a small 12V dc motor.
The harvesting main bodies 5 are four in number, two first motors 4 and three transmission devices 3 are correspondingly arranged, wherein the two first motors 4 and the three transmission devices 3 are arranged at intervals, each two adjacent harvesting main bodies 5 are correspondingly driven by one first motor 4, and the three transmission devices 3 are correspondingly positioned on one side, far away from the first motor 4, of each harvesting main body 5. So design, can realize gathering in the highland crack that fruit car 1 walks once, gather four rows or eight rows of pineapples simultaneously, specific line number is confirmed according to the group number of every support broach 53 of gathering in the main part 5. The two harvesting bodies 5 in the middle share one conveyor 3, and one conveyor 3 may be provided each.
A second running wheel 7 is respectively arranged below the two first motors 4, and each second running wheel 7 is rotatably arranged on the frame 2. The second running wheels 7 mainly run between ridges. Through setting up the second wheel 7 of traveling, have certain supporting role to gathering main part 5, and make the walking of whole machine more smooth and easy. The advancing direction of the second driving wheel 7 can be provided with a nearside divider to separate the pineapple branches and leaves, so that the second driving wheel 7 is prevented from being influenced. The second running wheel is connected with the frame through a pin shaft, and the second running wheel and the frame can perform profiling motion according to the change of ground movement when the machine runs.
Claims (10)
1. The utility model provides a comb tooth reel formula pineapple harvester which characterized in that: the harvesting machine comprises a high-ground-clearance fruit collecting vehicle (1), a rack (2), a conveying device (3), a first motor (4) and a harvesting main body (5), wherein the conveying device (3) is fixedly connected with the high-ground-clearance fruit collecting vehicle (1) and arranged on one side of the harvesting main body (5), the harvesting main body (5) comprises a shaftless comb-tooth grain pulling wheel (51), a sliding plate (52) and supporting comb teeth (53), the first motor (4) is fixedly arranged behind the high-ground-clearance fruit collecting vehicle (1), the shaftless comb-tooth grain pulling wheel (51) is controlled to rotate circumferentially through the first motor (4), the sliding plate (52) and the supporting comb teeth (53) are fixedly arranged inside the shaftless comb-tooth grain pulling wheel (51) through the rack (2), the sliding plate (52) is obliquely arranged above the supporting comb teeth (53), one end of the conveying device (3) is communicated with the high-ground-clearance fruit collecting vehicle (1), the other end of the lifting device is arranged lower than the low end of the sliding plate (52), in the advancing process of the fruit collecting vehicle (1) in the high ground clearance, the supporting comb teeth (53) pull the pineapples in the advancing direction, the shaftless comb tooth stalk pulling wheel (51) rotates in the circumferential direction to pick the pineapples, the picked pineapples are thrown onto the sliding plate (52) along with the circumferential rotation of the shaftless comb tooth stalk pulling wheel (51), and the pineapples fall into the conveying device (3) along the inclined direction of the sliding plate (52) and are conveyed into the fruit collecting vehicle (1) in the high ground clearance through the conveying device (3).
2. The comb-tooth reel type pineapple harvesting machine according to claim 1, characterized in that: the shaftless comb-tooth reel (51) comprises two frame rings (511) which are coaxially arranged, a plurality of support rods (512) connected between the two frame rings (511), and a group of tangential comb teeth (513) and a group of radial comb teeth (514) which are arranged on each support rod (512), wherein one frame ring (511) is fixedly arranged at the output end of the first motor (4), and each group of tangential comb teeth (513) are tangentially arranged along the rotating direction of the frame ring (511).
3. A comb-poking wheel type pineapple harvesting machine according to claim 1 or 2, characterized in that: the supporting comb teeth (53) comprise a comb tooth frame (531) and a row of J-shaped comb teeth (532) which are integrally and fixedly arranged at the bottom end of the comb tooth frame (531), and the J-shaped comb teeth (532) are arranged back to back in a high-clearance manner on the fruit collecting vehicle (1).
4. The comb-tooth reel type pineapple harvesting machine according to claim 1, characterized in that: the first motor (4) and the transmission device (3) are respectively arranged at two sides of the shaftless comb-tooth reel (51).
5. The comb-tooth reel type pineapple harvesting machine according to claim 1, 2 or 4, characterized in that: the high-clearance fruit collecting vehicle (1) comprises a fruit collecting box (11) and at least two first travelling wheels (12) which support and drive the fruit collecting box to move.
6. The comb-tooth reel type pineapple harvesting machine according to claim 5, wherein: the front end of the fruit collecting vehicle (1) in the high clearance is connected to the rear end of the tractor through a traction frame (6).
7. The comb-poking wheel type pineapple harvesting machine of claim 1, 2, 4 or 6, characterized in that: the conveying device (3) is a U-shaped belt conveyor and comprises a second motor (31), a protective shell (32), two first belt pulleys (33), two second belt pulleys (34), four third belt pulleys (35) and a plurality of belts, wherein one end of the protective shell (32) is clamped at the upper part of the fruit collecting vehicle (1) in the highland crack, the other end of the protective shell is fixedly arranged on the rack (2), the first belt pulleys (33) and the second belt pulleys (34) are arranged at one end, close to the sliding plate (52), in the protective shell (32), the third belt pulleys (35) are arranged at one end, close to the fruit collecting vehicle (1) in the highland crack, the two second belt pulleys (34) are arranged between the two first belt pulleys (33), the diameters of the two second belt pulleys (34) are smaller than those of the two first belt pulleys (33), the two first belt pulleys (33) and the two second belt pulleys (34) are respectively and correspondingly connected with the four third belt pulleys (35) through the belts (36), the four third pulleys (35) are coaxially driven by a second motor (31).
8. The comb-tooth reel type pineapple harvesting machine according to claim 1, characterized in that: baffle plates (521) are fixedly mounted at the top end of one side wall of the sliding plate (52) far away from the fruit collecting vehicle (1) in the high clearance and at the top end of one side wall of one end far away from the conveying device (3), and the baffle plates (521) are arranged obliquely to the sliding plate (52).
9. The comb-tooth reel type pineapple harvesting machine according to claim 1, characterized in that: the harvesting machine is characterized in that the harvesting main bodies (5) are four in number, two first motors (4) and three transmission devices (3) are correspondingly arranged, the two first motors (4) and the three transmission devices (3) are arranged at intervals, each two adjacent harvesting main bodies (5) are correspondingly driven by one first motor (4), and the three transmission devices (3) are correspondingly positioned on one side, far away from the first motors (4), of each harvesting main body (5).
10. The comb-tooth reel type pineapple harvesting machine according to claim 9, characterized in that: a second running wheel (7) is respectively arranged below the two first motors (4), and each second running wheel (7) is rotatably arranged on the frame (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122139611.2U CN215957209U (en) | 2021-09-06 | 2021-09-06 | Comb-tooth reel type pineapple harvesting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122139611.2U CN215957209U (en) | 2021-09-06 | 2021-09-06 | Comb-tooth reel type pineapple harvesting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215957209U true CN215957209U (en) | 2022-03-08 |
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ID=80467105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122139611.2U Active CN215957209U (en) | 2021-09-06 | 2021-09-06 | Comb-tooth reel type pineapple harvesting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215957209U (en) |
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2021
- 2021-09-06 CN CN202122139611.2U patent/CN215957209U/en active Active
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