CN111406493A - Peanut strip laying machine and control method thereof - Google Patents
Peanut strip laying machine and control method thereof Download PDFInfo
- Publication number
- CN111406493A CN111406493A CN202010362149.XA CN202010362149A CN111406493A CN 111406493 A CN111406493 A CN 111406493A CN 202010362149 A CN202010362149 A CN 202010362149A CN 111406493 A CN111406493 A CN 111406493A
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- driving
- peanut
- shaft
- main frame
- strip
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D29/00—Harvesters for peanuts
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D33/00—Accessories for digging harvesters
Abstract
The invention discloses a peanut strip laying machine and a control method thereof. The peanut strip laying machine comprises a main frame, two folding frames, a plurality of strip laying mechanisms and a driving mechanism; the main frame is positioned between the two folding frames, a driving shaft is arranged on the main frame, supporting wheels are arranged at the bottom of the main frame, a driven shaft is arranged on the folding frames, the folding frames are rotatably arranged on the main frame, a first oil cylinder is arranged between the folding frames and the main frame, and the driving shaft is used for driving the driven shaft to rotate; the strip paving mechanism comprises a mounting frame, a transmission shaft, two digging shovels and two clamping assemblies, wherein each clamping assembly comprises a clamping chain, a driving chain wheel and a plurality of driven chain wheels, a driving rotating shaft of the driving chain wheel and a driven rotating shaft of the driven chain wheel are respectively and rotatably arranged on the mounting frame, the transmission shaft is used for driving the driving rotating shaft to rotate, the two clamping chains are arranged side by side, and the two digging shovels are arranged at the front end part of the mounting frame; the bottom of the main frame and the bottom of the folding frame are respectively provided with a strip paving mechanism. The peanut strip-spreading machine has the advantages of high universality and high harvesting efficiency.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a peanut strip laying machine and a control method thereof.
Background
The peanut is also known as peanut, is known as 'vegetable meat', has the oil content of up to 50 percent, good quality and fragrant smell. However, the mechanization degree of peanut harvesting is not high in China, manual harvesting is abundant, the peanut harvesting process is complex, the processes of digging, soil screening, airing, picking and the like are needed, the processes are multiple, the labor intensity is high, great manpower is needed for manual operation, the manual harvesting efficiency is very low, and the pushing mechanized harvesting operation is forced to be carried out in the very first Chinese patent No. 201410529009.1, which discloses a peanut harvester with a seedling and fruit strip spreading device, and particularly discloses that peanuts and peanut seedlings are shoveled from a planting field by adopting a digging shovel, and after people walk, the peanut seedlings are automatically output and spread by two clamping chains which are arranged oppositely. However, the working surface of the conventional peanut harvester is narrow, and if a plurality of groups of digging shovels and clamping chains are arranged side by side at the same time, the requirement of the narrow working surface cannot be met. In view of this, how to design a peanut strip paver with strong universality and high harvesting efficiency is the technical problem to be solved by the invention.
Disclosure of Invention
The invention provides a peanut strip laying machine and a control method thereof, which can improve the universality of the peanut strip laying machine and the harvesting efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a peanut strip laying machine, which comprises: the device comprises a main frame, two folding frames, a plurality of strip paving mechanisms, a depth limiting mechanism and a driving mechanism; the folding frame is rotatably arranged on the main frame, a first oil cylinder is arranged between the folding frame and the main frame, and the driving shaft is used for driving the driven shaft to rotate; the strip paving mechanism comprises a mounting frame, a transmission shaft, two digging shovels and two clamping assemblies, wherein the transmission shaft is rotatably mounted on the mounting frame, each clamping assembly comprises a clamping chain, a driving chain wheel and a plurality of driven chain wheels, a driving rotating shaft of the driving chain wheel and a driven rotating shaft of the driven chain wheel are respectively and rotatably arranged on the mounting frame, the transmission shaft is used for driving the driving rotating shafts to rotate, the two clamping chains are arranged side by side, two lifting assemblies are arranged at the front end part of the mounting frame, and the two digging shovels are arranged at the front end parts of the mounting frame on the corresponding lifting assemblies; the bottom parts of the main frame and the folding frame are respectively provided with the strip paving mechanism, the driven shaft is used for driving the transmission shaft to rotate, and the driving mechanism is used for driving the driving shaft to rotate; the depth limiting mechanism comprises a roller, a sleeve, an insertion pipe, a spring and a first displacement sensor, the sleeve is vertically arranged on the main frame, the insertion pipe is arranged in the sleeve, the spring is located in the sleeve and is abutted against the top of the insertion pipe, the first displacement sensor is arranged on the sleeve and is used for detecting the displacement of the insertion pipe, and the roller is rotatably arranged at the bottom of the insertion pipe.
Furthermore, a first gear is respectively arranged on the driving shaft and the driven shaft, a second gear is arranged on the transmission shaft, and the second gear is meshed with the first gear.
Furthermore, two end parts of the transmission shaft are respectively provided with a first bevel gear, the driving rotating shaft is provided with a second bevel gear, and the first bevel gear is meshed with the second bevel gear.
Furthermore, two ends of the driving shaft are provided with first universal couplings, one end of the driven shaft is provided with a second universal coupling, and the first universal couplings are connected with the second universal couplings on the corresponding sides through connecting parts.
Furthermore, the connecting part comprises a connecting sleeve and a connecting rod, the connecting rod is inserted into the connecting sleeve, the connecting sleeve is arranged on the second universal coupler, and the connecting rod is arranged on the first universal coupler.
Furthermore, a second oil cylinder, a sliding rail and a sliding seat are respectively arranged on the main frame and the folding frame, the sliding seat is slidably arranged on the sliding rail, and the second oil cylinder is used for driving the sliding seat to slide along the sliding rail; the mounting frame is arranged at the bottom of the sliding seat.
Furthermore, a second displacement sensor for detecting the sliding displacement of the sliding seat is further arranged on the second oil cylinder.
Furthermore, the lifting assembly is a third oil cylinder or an electric push rod.
The invention also provides a control method of the peanut strip laying machine, which comprises the following steps: the depth-limiting mechanism detects the up-and-down movement distance of the insertion pipe through the first displacement sensor to control the lifting assembly to drive the digging shovel to lift.
Furthermore, the position of the corresponding mounting rack is adjusted by each second oil cylinder according to the distance between different peanut ridges.
Compared with the prior art, the technical scheme of the invention has the following technical effects: folding frames are respectively arranged on two sides of the main frame, and strip paving mechanisms are respectively arranged on the main frame and the folding frames, so that the quantity of the strip paving mechanisms participating in work can be selected according to the size of an actual working face in the actual use process, and the folding frames are only operated through the strip paving mechanisms on the main frame by retracting the two sides under the condition of a narrow working face, and the folding frames are put down under the condition of a wide working face, so that the strip paving mechanisms on the folding frames also participate in work, the universality of the peanut strip paving machine is improved, and the harvesting efficiency is improved.
Drawings
FIG. 1 is one of the schematic structural views of a peanut strip laying machine;
FIG. 2 is an enlarged view of a portion of area A of FIG. 1;
FIG. 3 is a second schematic structural view of the peanut strip laying machine;
FIG. 4 is one of the assembling views of the bar-laying mechanism and the folding frame of the peanut bar-laying machine;
fig. 5 is a second assembly view of the bar-laying mechanism and the folding frame of the peanut bar-laying machine.
Detailed Description
As shown in fig. 1 to 5, the present invention provides a peanut strip laying machine, comprising: the folding device comprises a main frame 1, two folding frames 2, a plurality of strip paving mechanisms 3 and a driving mechanism 4; the main frame 1 is located between two folding frame 2, is provided with driving shaft 11 on the main frame 1, and corresponding peanut strip spreads the machine and still is provided with supporting wheel (not shown) in the bottom of main frame 1, the front end of main frame is provided with drags connecting portion, and in the in-service use in-process, then peanut strip spreads the machine and can go through agricultural vehicles such as tractor power drive its traveling to make peanut strip spread the machine and can go in planting ground.
The folding frame 2 is provided with a driven shaft 21, the folding frame 2 is rotatably arranged on the main frame 1, a first oil cylinder 5 is arranged between the folding frame 2 and the main frame 1, and the driving shaft 11 is used for driving the driven shaft 21 to rotate.
The strip paving mechanism 3 comprises a mounting frame 31, a transmission shaft 32, two digging shovels 33 and two clamping assemblies 34, wherein the transmission shaft 32 is rotatably mounted on the mounting frame 31, each clamping assembly 34 comprises a clamping chain 341, a driving chain 342 and a plurality of driven chain wheels 343, a driving rotating shaft 3421 of the driving chain 342 and a driven rotating shaft of the driven chain wheels 343 are respectively rotatably arranged on the mounting frame 31, the transmission shaft 32 is used for driving the driving rotating shafts to rotate, the two clamping chains 341 are arranged side by side, and the two digging shovels 33 are arranged at the front end part of the mounting frame 31; the bottom of the main frame 1 and the bottom of the folding frame 2 are respectively provided with a strip paving mechanism 3, the driven shaft 21 is used for driving the transmission shaft 32 to rotate, and the driving mechanism 4 is used for driving the driving shaft 11 to rotate.
In the actual use process, the peanut strip laying machine is transported to the planting place, and when the peanuts are harvested, the states of the two folding frames 2 can be adjusted according to the width of the working face. The method specifically comprises the following steps: when peanuts are harvested on a narrow working surface, the harvesting operation is usually carried out by only adopting the strip-laying mechanism 3 arranged on the main frame 1. When harvesting operation is carried out on the planting land in a large area, the folding frames 2 on the two sides of the main frame 1 can be respectively put down due to the large width of the working face, so that the strip paving mechanisms 3 on the folding frames 2 participate in the harvesting operation. Therefore, the harvesting operation requirements of different working face widths can be met, and the harvesting efficiency can be effectively improved when a large area is harvested.
The strip paving mechanisms 3 on the main frame 1 and the folding frame 2 are driven by the same driving mechanism 4. The driving mechanism 4 generally comprises a reduction box 41 and a motor (not shown), the reduction box 41 is directly mounted on the main frame 1, and the motor can also be mounted on the main frame 1. The output shaft of the speed reducer is connected with the driving shaft 11 on the main frame 1 to provide power for the driving shaft 11. And the driving shaft 11 transmits power to the strip paving mechanisms 3 on the main frame 1 to drive the corresponding driving chain wheels 342 to rotate, and meanwhile, the driving shaft 11 also transmits power to the driven shaft 21 on the folding frame 2 to drive the strip paving mechanisms 3 on the folding frame 2 to operate through the driven shaft 21. For the specific manner of receiving peanuts by the bar paving mechanism 3, reference may be made to a peanut bar paving machine in the conventional technology, which is not limited and described herein.
In addition, two strip paving mechanisms 3 are arranged at the bottom of the main frame 1, correspondingly, the reduction gearbox 41 is located between the two strip paving mechanisms 3 on the main frame 1, and the reducer adopts a double-output shaft design, so that the output shafts at two sides of the reducer are correspondingly connected with the driving shaft 11, and the strip paving mechanisms 3 at the corresponding side are driven to operate through the driving shaft 11.
Meanwhile, in order to reduce the peanut missing, the peanut swath paver also comprises a depth limiting mechanism 9 which comprises a roller 91, a sleeve 92, an insertion tube 93, a spring (not shown) and a first displacement sensor 94, wherein the sleeve is vertically arranged on the main frame, the spring is arranged in the sleeve and is abutted against the top of the insertion tube, the first displacement sensor is arranged on the sleeve and is used for detecting the displacement of the insertion tube, the roller is rotatably arranged at the bottom of the insertion tube, correspondingly, the front end part of the mounting frame is provided with two lifting assemblies 331, two digging shovels 33 are arranged on the corresponding lifting assemblies 331, in the actual use process, the roller is always abutted against the surface of the planting ground under the action of the spring, and along with the fluctuation of the height of the planting ground, the roller drives the insertion tube to move, and then the distance of the up-down movement is detected by the first displacement sensor, the controller L arranged on the peanut swath paver is used for detecting the distance of the up-down movement, and the digging shovel is adjusted according to the detected by the first displacement sensor, and the controller is used for adjusting the digging depth of the digging shovel assembly, and the digging sensor.
Further, a first gear 101 is disposed on the driving shaft 11 and the driven shaft 21, respectively, and a second gear 102 is disposed on the transmission shaft 32, wherein the second gear 102 is engaged with the first gear 101. Specifically, in the rotation process of the driving shaft 11 or the driven shaft 21, the first gear 101 is driven to rotate, the transmission shaft 32 is driven to rotate by the cooperation of the first gear 101 and the second gear 102, and the transmission shaft 32 is utilized to drive the driving sprocket 342 in the belt paving mechanism 3 to rotate, so that the rotation of the two clamping chains 341 is realized. In the way that the transmission shaft 32 drives the driving sprocket 342, the two ends of the transmission shaft 32 are respectively provided with a first bevel gear 103, the driving rotation shaft is provided with a second bevel gear 104, and the first bevel gear 103 is meshed with the second bevel gear 104.
Based on the above technical solution, optionally, two end portions of the driving shaft 11 are provided with first universal couplings 201, one end portion of the driven shaft 21 is provided with a second universal coupling 202, and the first universal couplings 201 are connected with the second universal couplings 202 on the corresponding side through connecting parts. Specifically, two universal couplings are adopted to connect the driven shaft 21 and the driving shaft 11, so that the phenomenon of unsmooth power transmission caused by the fact that the opening position of the folding frame 2 cannot keep high consistency can be effectively reduced.
Wherein, to adapting unit, it can adopt detachable mode to connect between two universal joint, like this, under 2 folded frame fold condition, then with adapting unit from dismantling between two universal joint, adapting unit then can adopt modes such as connecting axle. Preferably, in order to improve the convenience of use, the connection member does not need to be disassembled even when the folding frame 2 is in the folded state, and then the connection member includes a connection sleeve 203 and a connection rod 204, the connection rod 204 is inserted into the connection sleeve 203, the connection sleeve 203 is disposed on the second universal coupling 202, and the connection rod 204 is disposed on the first universal coupling 201. Specifically, the connecting part is composed of a connecting sleeve 203 and a connecting rod 204 which can slide relatively, and in the process that the first oil cylinder 5 drives the folding frame 2 to rotate, the connecting rod 204 slides in the connecting sleeve 203 and is matched with two universal couplings, so that the folding requirement of the folding frame 2 can be met on the premise that the connecting part is not detached. And then need not operating personnel in the harvest process, frequent dismantlement adapting unit has reduced workman's intensity of labour and is more favorable to improving results efficiency.
Furthermore, for different planting areas, the planting intervals of the peanuts are different, and in order to improve the universality, a second oil cylinder 6, a sliding rail 7 and a sliding seat 8 are respectively arranged on the main frame 1 and the folding frame 2, the sliding seat 8 is slidably arranged on the sliding rail 7, and the second oil cylinder 6 is used for driving the sliding seat 8 to slide along the sliding rail 7; the mounting frame 31 is provided at the bottom of the sliding seat 8. Specifically, to the peanut ridge of different intervals, then can drive slide carriage 8 through second hydro-cylinder 6 and slide, adjust the position that corresponds position department strip shop mechanism 3 to make the top of strip shop mechanism 3 and peanut ridge, with accurate the peanut results. In order to accurately control the moving distance of the second oil cylinder 6, a second displacement sensor 61 for detecting the sliding displacement of the sliding seat 8 may be further disposed on the second oil cylinder 6, and the moving distance of the sliding seat 8 is detected by the second displacement sensor 61, so as to accurately control the moving distance of the bar-paving mechanism 3.
Based on the technical solution related to the peanut strip laying machine described in the above embodiment, the present invention also provides a control method of the peanut strip laying machine, including: the step of automatically adjusting the digging depth and the step of automatically adapting to the peanut ridge spacing.
Under the step of automatically adjusting the excavating depth, the depth limiting mechanism detects the up-down movement distance of the insertion pipe through the first displacement sensor to control the lifting assembly to drive the excavating shovel to lift. Under the step of automatically adapting to the peanut ridge distance, an operator inputs the information of the corresponding peanut ridge distance according to the distance between different peanut ridges in the planting field, and then the position of the corresponding mounting frame is adjusted by each second oil cylinder.
Compared with the prior art, the technical scheme of the invention has the following technical effects: folding frames are respectively arranged on two sides of the main frame, and strip paving mechanisms are respectively arranged on the main frame and the folding frames, therefore, in the actual use process, the quantity of the strip paving mechanisms participating in the work can be selected according to the size of an actual working face, and under the condition of a narrow working face, the folding frames 2 on two sides are folded, the strip paving mechanisms on the main frame are only operated, and under the condition of a wide working face, the folding frames are put down, so that the strip paving mechanisms on the folding frames also participate in the work, the universality of the peanut strip paving machine is improved, and the harvesting efficiency is improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A peanut strip laying machine, comprising: the device comprises a main frame, two folding frames, a plurality of strip paving mechanisms, a depth limiting mechanism and a driving mechanism; the folding frame is rotatably arranged on the main frame, a first oil cylinder is arranged between the folding frame and the main frame, and the driving shaft is used for driving the driven shaft to rotate; the strip paving mechanism comprises a mounting frame, a transmission shaft, two digging shovels and two clamping assemblies, wherein the transmission shaft is rotatably mounted on the mounting frame, each clamping assembly comprises a clamping chain, a driving chain wheel and a plurality of driven chain wheels, a driving rotating shaft of the driving chain wheel and a driven rotating shaft of the driven chain wheel are respectively and rotatably arranged on the mounting frame, the transmission shaft is used for driving the driving rotating shafts to rotate, the two clamping chains are arranged side by side, two lifting assemblies are arranged at the front end part of the mounting frame, and the digging shovels are arranged on the corresponding lifting assemblies; the bottom parts of the main frame and the folding frame are respectively provided with the strip paving mechanism, the driven shaft is used for driving the transmission shaft to rotate, and the driving mechanism is used for driving the driving shaft to rotate; the depth limiting mechanism comprises a roller, a sleeve, an insertion pipe, a spring and a first displacement sensor, the sleeve is vertically arranged on the main frame, the insertion pipe is arranged in the sleeve, the spring is located in the sleeve and is abutted against the top of the insertion pipe, the first displacement sensor is arranged on the sleeve and is used for detecting the displacement of the insertion pipe, and the roller is rotatably arranged at the bottom of the insertion pipe.
2. The peanut stripe paving machine as claimed in claim 1, wherein a first gear is provided on each of said driving shaft and said driven shaft, and a second gear is provided on said driving shaft, said second gear being engaged with said first gear.
3. The peanut stick paving machine as claimed in claim 1, wherein first bevel gears are respectively arranged at two end parts of the transmission shaft, a second bevel gear is arranged on the driving rotating shaft, and the first bevel gears are meshed with the second bevel gears.
4. The peanut stick laying machine according to claim 1, wherein first universal couplings are arranged at two end portions of the driving shaft, second universal couplings are arranged at one end portion of the driven shaft, and the first universal couplings are connected with the second universal couplings on the corresponding side through connecting parts.
5. The peanut stick laying machine of claim 4, wherein the connecting member includes a connecting sleeve and a connecting rod, the connecting rod is inserted in the connecting sleeve, the connecting sleeve is disposed on the second universal coupling, and the connecting rod is disposed on the first universal coupling.
6. The peanut strip laying machine as claimed in claim 1, wherein the main frame and the folding frame are respectively provided with a second oil cylinder, a slide rail and a sliding seat, the sliding seat is slidably arranged on the slide rail, and the second oil cylinder is used for driving the sliding seat to slide along the slide rail; the mounting frame is arranged at the bottom of the sliding seat.
7. The peanut stick laying machine of claim 6, wherein the second cylinder is further provided with a second displacement sensor for detecting the sliding displacement of the sliding seat.
8. The peanut stripe paving machine of claim 1, wherein the lifting assembly is a third cylinder or an electric push rod.
9. A method of controlling a peanut rod maker as claimed in any one of claims 1 to 8, comprising: the depth-limiting mechanism detects the up-and-down movement distance of the insertion pipe through the first displacement sensor to control the lifting assembly to drive the digging shovel to lift.
10. The method of claim 9, further comprising adjusting the position of the corresponding mounting bracket by each second cylinder based on the distance between different peanut ridges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010362149.XA CN111406493A (en) | 2020-04-30 | 2020-04-30 | Peanut strip laying machine and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010362149.XA CN111406493A (en) | 2020-04-30 | 2020-04-30 | Peanut strip laying machine and control method thereof |
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| Publication Number | Publication Date |
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| CN111406493A true CN111406493A (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010362149.XA Pending CN111406493A (en) | 2020-04-30 | 2020-04-30 | Peanut strip laying machine and control method thereof |
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| CN (1) | CN111406493A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4184314A (en) * | 1978-02-21 | 1980-01-22 | Hobbs Oliver K | Foldable tri-section vine fluffer |
| CN203661590U (en) * | 2013-12-23 | 2014-06-25 | 青岛弘盛汽车配件有限公司 | Automatic hydraulic two-ridge four-row row-aligning and harvesting device |
| CN104255171A (en) * | 2014-10-10 | 2015-01-07 | 青岛农业大学 | Peanut harvester with vine and fruit strip-spreading device |
| CN205865083U (en) * | 2016-05-27 | 2017-01-11 | 松原市宁江区昌盛花生产销加工专业合作社 | Four lines peanut harvester |
| CN206260289U (en) * | 2016-10-28 | 2017-06-20 | 农业部南京农业机械化研究所 | A kind of peanut combine harvesting-platform |
| CN206948906U (en) * | 2017-07-28 | 2018-02-02 | 山东源泉机械有限公司 | A kind of four-wheel pulling type list ridge double-row peanut cropper |
| US20180295773A1 (en) * | 2017-04-13 | 2018-10-18 | Fehr's Industrial Manufacturing, LLC | Peanut digger-shaker-inverter |
| CN208462372U (en) * | 2018-05-17 | 2019-02-05 | 烟台市博朗机器人科技有限公司 | A kind of rotary cutter type butterfly shape grass trimmer |
-
2020
- 2020-04-30 CN CN202010362149.XA patent/CN111406493A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4184314A (en) * | 1978-02-21 | 1980-01-22 | Hobbs Oliver K | Foldable tri-section vine fluffer |
| CN203661590U (en) * | 2013-12-23 | 2014-06-25 | 青岛弘盛汽车配件有限公司 | Automatic hydraulic two-ridge four-row row-aligning and harvesting device |
| CN104255171A (en) * | 2014-10-10 | 2015-01-07 | 青岛农业大学 | Peanut harvester with vine and fruit strip-spreading device |
| CN205865083U (en) * | 2016-05-27 | 2017-01-11 | 松原市宁江区昌盛花生产销加工专业合作社 | Four lines peanut harvester |
| CN206260289U (en) * | 2016-10-28 | 2017-06-20 | 农业部南京农业机械化研究所 | A kind of peanut combine harvesting-platform |
| US20180295773A1 (en) * | 2017-04-13 | 2018-10-18 | Fehr's Industrial Manufacturing, LLC | Peanut digger-shaker-inverter |
| CN206948906U (en) * | 2017-07-28 | 2018-02-02 | 山东源泉机械有限公司 | A kind of four-wheel pulling type list ridge double-row peanut cropper |
| CN208462372U (en) * | 2018-05-17 | 2019-02-05 | 烟台市博朗机器人科技有限公司 | A kind of rotary cutter type butterfly shape grass trimmer |
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Application publication date: 20200714 |
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