CN110771346A - Wild grass seed harvesting knife with double semicircular arc tooth shapes - Google Patents
Wild grass seed harvesting knife with double semicircular arc tooth shapes Download PDFInfo
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- CN110771346A CN110771346A CN201911242085.3A CN201911242085A CN110771346A CN 110771346 A CN110771346 A CN 110771346A CN 201911242085 A CN201911242085 A CN 201911242085A CN 110771346 A CN110771346 A CN 110771346A
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- 238000003306 harvesting Methods 0.000 title claims abstract description 102
- 244000025254 Cannabis sativa Species 0.000 title claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 7
- 239000004459 forage Substances 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract description 10
- 238000012360 testing method Methods 0.000 description 13
- 210000005069 ears Anatomy 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 241000132521 Erigeron Species 0.000 description 3
- 241001124569 Lycaenidae Species 0.000 description 2
- 241000585809 Stipa capillata Species 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241000235935 Hilaria belangeri Species 0.000 description 1
- 241001598107 Imperata Species 0.000 description 1
- 241000209504 Poaceae Species 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D45/00—Harvesting of standing crops
- A01D45/30—Harvesting of standing crops of grass-seeds or like seeds
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Harvester Elements (AREA)
Abstract
The invention discloses a double-semicircular-arc-tooth-shaped wild grass seed harvesting knife which comprises a knife main body, a mounting hole and a knife tooth group, wherein the mounting hole is positioned at the lower part of the knife main body and is used for mounting a harvesting knife; the cutter tooth group is positioned at the upper part of the cutter main body and comprises a plurality of equal-height cutter teeth arranged side by side, and the cutter teeth are in double semi-circular arc tooth shapes and used for harvesting wild grass seeds. The invention improves the harvest purity of wild grass seeds, greatly reduces the phenomenon of 'tooth sticking' commonly existing in the prior art, eliminates the phenomenon of 'knife winding', and provides a solution for the high-purity harvest of wild grass seeds in high-altitude cold regions.
Description
Technical Field
The invention belongs to the technical field of pasture seed harvesting equipment, relates to a technology for harvesting wild pasture seeds in high-altitude cold regions, and particularly relates to a double-semicircular-arc-tooth-shaped wild pasture seed harvesting knife.
Background
The mechanized harvesting of wild grass seeds is an effective way for meeting the requirements of large-scale grassland construction on seeds. The existing hand-held wild grass seed harvesting machines are all small-sized devices, the working effect is positioned in primary harvesting, namely only grass seeds ears are harvested under the field environment without threshing treatment, and therefore, the mechanical harvesting purity is generally not high. The harvesting knife is used as a core part of the seed harvesting machine, and the shape of the knife teeth of the harvesting knife directly determines the harvesting purity of the wild grass seeds by the harvesting machine.
Therefore, people do a great deal of technical work on the aspect of the shape of the cutter teeth of the harvesting cutter of the field grass harvesting machine, and have different problems and defects respectively, which are as follows:
the Chinese utility model patent with the application number of '201520362246.3' and the name of 'a harvesting device for plateau wild grass seeds and ears' provides four kinds of toothed harvesting knives, namely triangular teeth, trapezoidal teeth, circular teeth and wave teeth. The utility model discloses a four kinds of sword teeth do not all provide cutter size parameter, and the sword top surface, sword cutting edge face, the bottom of tooth face in the sword tooth are the plane, mean that the morpheme change of sword tooth is great, must lead to the results purity not high, and "the latch twines the sword" phenomenon comparatively generally.
The application number is "201721404842.9", the name is "miniature wild short grass seed harvesting device of hand-held type" the chinese utility model patent provides a results cutter, and this results cutter is the semicircle tubular type, and the results mode is "rotatory formula of beating", and the during operation, the results cutter is rotatory to a work plane, and the results cutter breaks the grass ear of grain pole, and the whole entering semicircle lumen of grass seed ear is got rid of the seed under the effect of inertial force and is stored the chamber. The harvesting cutter is suitable for wild pasture with short and uniform seed ear height and seed ear diameter far larger than ear stem diameter, but obviously is not suitable for the wild pasture with uneven seed ear height and small difference between the seed ear diameter and the ear stem diameter. More importantly, the harvesting knife is used for integrally harvesting the grass seeds and ears, so that the harvesting purity is not high.
The Chinese journal paper, "research on design scheme of grass ear harvesting device for wild pasture grass in Tibet (Nenjiang science and technology, No. 3 in 2016, pages 56-57)", provides two harvesting modes as harvesting tools, namely an impeller type and a hairbrush type, wherein the impeller type adopts a scheme of 5 different torsion angles, and the hairbrush type adopts a scheme of 3 middle-hardness hairbrushes. The blade of the impeller type cutter is a straight line, and when the cutter rotates, the blade mainly acts on the ear stem part, so that the wild pasture grass ears are difficult to knock, and most of the harvested grass ears are grass leaves or ear stems containing the whole grass ears, thus the harvesting effect is poor; according to the brush type harvesting scheme, the soft brush cannot break the grass ears and cannot harvest the grass, the number of grass leaves of the harvesting knife is large, the hard brush can sweep too many grass leaves and ear stems into the harvesting cavity, and high-purity harvesting of seeds cannot be achieved.
In view of the above, the prior art harvesting knife technology is clearly not adaptable for high purity harvesting of wild grass seeds.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the invention provides the double-semicircular-arc-tooth-shaped wild grass seed harvesting knife, which improves the harvesting purity of wild grass seeds, greatly reduces the phenomenon of 'tooth clamping' commonly existing in the prior art, eliminates the phenomenon of 'knife winding', and provides a solution for high-purity harvesting of wild grass seeds in high-altitude cold regions.
Therefore, the invention adopts the following technical scheme:
a double-semicircular-arc-tooth-shaped wild grass seed harvesting knife comprises a knife main body, a mounting hole and a knife tooth group, wherein the mounting hole is positioned at the lower part of the knife main body and is used for mounting the harvesting knife; the cutter tooth group is positioned at the upper part of the cutter main body and comprises a plurality of equal-height cutter teeth arranged side by side, and the cutter teeth are in double semi-circular arc tooth shapes and used for harvesting wild grass seeds.
Further, the knife main body is a metal flat plate, and the plane of the knife main body is symmetrical about the symmetry axis.
Further, the cutter tooth group mainly comprises 25.5 cutter teeth with the height of 5 mm.
Further, the width, height and thickness of the cutter tooth are respectively 10mm, 5mm and 1.8mm, and the cutter tooth comprises a cutter top part and a cutter bottom part.
Furthermore, the top of the knife and the bottom of the knife are both semicircular arcs with the diameter of 5mm, the two are oppositely arranged from left to right in sequence, the lower right corner of the top of the knife is connected with the upper left corner of the bottom of the knife, and the upper right corner of the bottom of the knife is connected with the lower left corner of the top of the next knife tooth knife.
Further, the profile outer edge of the top of the knife and the profile outer edge of the bottom of the knife are both provided with a semicircular angle, and the diameter of the semicircular angle is 1.8 mm.
Preferably, the mounting holes comprise two mounting holes, the diameter of each mounting hole is 5mm, the mounting holes are symmetrically distributed along a symmetry line of the cutter main body, the distance between two hole centers is 90mm, and the distance between the hole centers and the lower edge of the cutter main body is 10 mm.
Preferably, the harvesting knife is integrally made of 45 steel materials.
Compared with the prior art, the invention has the beneficial effects that:
(1) by improving the shape of the cutter teeth and determining the size parameters of the cutter, the harvesting purity of the wild grass seeds is improved.
(2) The semicircular arc-shaped cutter tooth contour line and the semicircular corner cutter tooth contour outer edge greatly reduce the ubiquitous 'latch' phenomenon in the prior art and eliminate the 'cutter winding' phenomenon.
(3) The method can adapt to the harvesting environment of the wild grass seeds in the high-altitude cold regions, and provides a solution for high-purity harvesting of the wild grass seeds in the high-altitude cold regions.
Drawings
FIG. 1 is a schematic structural view of a double-semicircular-arc-tooth-shaped wild grass seed harvesting knife provided by the invention.
Fig. 2 is a schematic structural view of section a in fig. 1.
Fig. 3 is a schematic structural view of the cutter teeth of the double-semicircular-arc-tooth-shaped wild grass seed harvesting cutter provided by the invention.
Description of reference numerals: i, a knife main body; II, mounting holes; III, a cutter tooth group; 3. cutter teeth; 2-1, semicircular angle; 3-1, the top of the knife; 3-2, the bottom of the knife.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are provided for illustration only and are not to be construed as limiting the invention.
As shown in figures 1-3, the invention discloses a double-semicircular-arc-tooth-shaped wild grass seed harvesting knife which comprises a knife main body I, mounting holes II and a knife tooth group III, wherein the upper part of the knife main body I is provided with 25.5 knife teeth 3 with the height of 5mm side by side, and the lower part of the knife main body I is provided with two symmetrical mounting holes II.
The knife main body I is a metal flat plate with the length, the height and the thickness of 255mm, 50mm and 1.8mm, and the plane of the knife main body I is symmetrical about a dot-dash line L.
The width, height and thickness of the cutter teeth 3 are respectively 10mm, 5mm and 1.8mm, and the cutter teeth comprise a cutter top part 3-1 and a cutter bottom part 3-2.
The cutter top part 3-1 and the cutter bottom part 3-2 are semicircular arcs with the diameter of 5mm, the two are sequentially arranged from left to right, the lower right corner of the cutter top part 3-1 is connected with the upper left corner of the cutter bottom part 3-2, and the upper right corner of the cutter bottom part 3-2 is connected to the lower left corner of the next cutter tooth cutter top part.
The outer edges of the profiles of the top part 3-1 and the bottom part 3-2 of the knife are provided with a fillet 2-1, and the diameter of the fillet 2-1 is 1.8 mm.
The two mounting holes II are symmetrically distributed according to a symmetrical line L of the cutter main body I, the diameter of each mounting hole II is 5mm, and a hole center O is formed
1O
2The distance between the hole centers and the lower edge line BC of the harvesting knife is 10 mm.
The whole material of the harvesting knife is made of 45 steel.
Examples
In order to examine the harvesting purity of a double-semicircular-arc-tooth-shaped wild grass seed harvesting knife, a wild grass seed harvesting test in a high-altitude cold area was performed in this embodiment, wherein the harvesting knife is a harvesting knife scheme provided by the present invention, an impeller scheme and a hairbrush scheme provided by the trapezoidal-tooth harvesting knife scheme provided by the utility model with the application number of "201520362246.3" and the study of the design scheme of the wild grass ear harvesting device in tibetan of the journal paper in china (inland river science and technology, 2016, 3 rd year, pages 56-57) ", and 6 types of harvesting knife comparison schemes are counted, and are specifically shown in table 1:
TABLE 1 Harvest type contrast protocol (unit: mm)
The wild grass seed harvesting test of this example was conducted under the same environmental conditions (the same plot, harvesting time, and motor speed were all consistent), and the harvested seeds were weighed to determine the harvest purity, and the 6 protocols in table 1 were analyzed by comparison. Meanwhile, the conditions of the 'latch' and the 'winding cutter' in the test are inspected. The protocol was as follows:
2 dominant wild pastures in high-altitude cold regions, namely dense-spike pastures, namely Tibet fleabane pasture, loose-spike pastures, and namely stipa capillata are selected. Selecting 6 blocks with the area of 1000m in high altitude cold regions
22 pieces of harvesting knives in 6 of the comparison scheme in the table 1 are respectively manufactured and symmetrically installed on a cutter installation shaft of 6 handheld wild grass seed harvesters, and the rotation speed of the installation shaft is set to be 300 r/min. The harvest trial consisted of 8 persons, with 6 persons mechanically harvested by operating the seed harvester and 2 persons data recorded. To ensure consistent environmental conditions, 6 seed harvesters are simultaneously carried out in one sample plot, each group of the solutions in each sample plot is mechanically harvested for 10 single tests, the harvesting time is 20min in total, and data recording, weighing, calculating and the like are carried out after the operation is finished, so that 60 single tests (30 times for each of 2 pasture grasses) are respectively carried out on each 6 harvesting knife solutions in the comparison solution in table 1, and the obtained seed related data are averaged to finally obtain the harvesting purity of different harvesting knife comparison solutions. The wild grass seed harvest test protocol is shown in table 2:
TABLE 2 wild grass seed harvest test protocol
The test results are shown in tables 3 and 4:
TABLE 3 Harvest purity statistical Table
TABLE 4 statistical table for cutter winding situation of latch
The above test data show that:
the double-semicircular-arc-tooth-shaped wild grass seed harvesting knife provided by the invention is used for carrying out a wild grass seed harvesting test in a high-altitude cold area, and under the same test environment condition, the knife shape provided by the invention achieves remarkable effects:
in the aspect of harvesting speed: as can be seen from the table 3, the harvesting knife-type scheme provided by the invention has excellent performance, the net harvesting weights of the Tibet fleabane seeds and the stipa capillata seeds are respectively 135.84g and 191.67g, the harvesting speeds are respectively 2.26g/min and 3.19g/min, the scheme is obviously superior to other schemes, the comparison effect is very obvious, and the scheme is the optimal harvesting speed scheme in the harvesting test.
And harvesting purity: as can be seen from the table 3, the harvesting knife-type scheme provided by the invention has excellent performance, the harvesting purity of the Tibet fleabane seeds and the Imperata elata seeds respectively reaches 81.6 percent and 85.5 percent, while the harvesting purity of other harvesting knife-type schemes is generally concentrated below 60 percent, and the comparison effect shows that the knife-type scheme provided by the invention is obviously superior to other schemes and is the optimal harvesting purity scheme of the harvesting test.
The aspect of the latch winding knife is as follows: it can be seen from table 4 that, thanks to the semi-circular corners arranged on the outer edges of the cutter teeth, the cutter type provided by the invention has no situations of 'latch' and 'knife winding' when grass seeds are harvested, and other schemes have situations of 'latch' and 'knife winding' in different degrees, in particular to a ladder-type scheme, wherein the 'latch' and the 'knife winding' respectively appear for 11 times and 19 times, which occupies 6.55min of working time, so that the total working time is shortened, and further the seed harvesting speed is influenced. The above situation shows that the harvesting knife type provided by the invention solves the problem of 'latch winding knife'.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and scope of the present invention are intended to be covered thereby.
Claims (8)
1. The utility model provides a two profile of semi-circular arc wild forage grass seed results sword, includes sword main part (I), mounting hole (II) and sword tooth group (III), its characterized in that: the mounting hole (II) is positioned at the lower part of the knife main body (I) and is used for mounting a harvesting knife; the cutter tooth group (III) is located on the upper portion of the cutter main body (I), and comprises a plurality of equal-height cutter teeth (3) arranged side by side, and the cutter teeth (3) are in double semi-circular arc tooth shapes and used for harvesting wild grass seeds.
2. The dual semi-circular toothed wildgrass seed harvesting knife of claim 1, wherein: the knife main body (I) is a metal flat plate, and the plane of the knife main body is symmetrical about a symmetry axis.
3. The dual semi-circular toothed wildgrass seed harvesting knife of claim 2, wherein: the cutter tooth group (III) mainly comprises 25.5 cutter teeth (3) with the height of 5 mm.
4. The dual semi-circular toothed wildgrass seed harvesting knife of claim 3, wherein: the width, height and thickness of the cutter teeth (3) are respectively 10mm, 5mm and 1.8mm, and the cutter teeth (3) comprise a cutter top part (3-1) and a cutter bottom part (3-2).
5. The dual semi-circular toothed wildgrass seed harvesting knife of claim 4, wherein: the top part (3-1) and the bottom part (3-2) are both semicircular arcs with the diameter of 5mm, the top part and the bottom part are sequentially and oppositely arranged from left to right, the right lower corner of the top part (3-1) is connected with the left upper corner of the bottom part (3-2), and the right upper corner of the bottom part (3-2) is connected with the left lower corner of the top part of the next cutter tooth cutter.
6. The dual semi-circular toothed wildgrass seed harvesting knife of claim 5, wherein: the outer edges of the profiles of the top part (3-1) and the bottom part (3-2) of the knife are both provided with a semicircular angle (2-1), and the diameter of the semicircular angle (2-1) is 1.8 mm.
7. The dual semi-circular toothed wildgrass seed harvesting knife of claim 2, wherein: the mounting holes (II) comprise two holes, the diameter of each mounting hole is 5mm, the mounting holes are symmetrically distributed along the symmetrical line of the cutter main body (I), the distance between two hole centers is 90mm, and the distance between the hole centers and the lower edge of the cutter main body (I) is 10 mm.
8. The dual semi-circular toothed wildgrass seed harvesting knife of any of claims 1 to 7, wherein: the whole harvesting knife is made of 45-steel materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911242085.3A CN110771346A (en) | 2019-12-06 | 2019-12-06 | Wild grass seed harvesting knife with double semicircular arc tooth shapes |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911242085.3A CN110771346A (en) | 2019-12-06 | 2019-12-06 | Wild grass seed harvesting knife with double semicircular arc tooth shapes |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2195843Y (en) * | 1993-06-26 | 1995-05-03 | 敬培军 | Apparatus for rotating cutting stalks |
| JP2001245517A (en) * | 2000-03-07 | 2001-09-11 | Yutaka Kanamaru | Shaking out-type rotary knife and its blade |
| CN1593084A (en) * | 2004-07-13 | 2005-03-16 | 泰州现代农业装备有限公司 | Combine combing barrel |
| CN104838804A (en) * | 2015-05-30 | 2015-08-19 | 苗彦军 | Device and method for harvesting seed ears of plateau wild forage grass |
| CN104938151A (en) * | 2015-06-12 | 2015-09-30 | 柳州市侗天湖农业生态旅游投资有限责任公司 | Knife special for picking tea leaves |
| CN205142888U (en) * | 2015-12-07 | 2016-04-13 | 刘玉祥 | Amphibious weed cutting boat |
| CN209299737U (en) * | 2018-12-29 | 2019-08-27 | 安徽加德荫园林机械有限公司 | A kind of weeding bellows knife |
| CN211210555U (en) * | 2019-12-06 | 2020-08-11 | 西藏农牧学院 | Wild grass seed harvesting knife with double semicircular arc tooth shapes |
-
2019
- 2019-12-06 CN CN201911242085.3A patent/CN110771346A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2195843Y (en) * | 1993-06-26 | 1995-05-03 | 敬培军 | Apparatus for rotating cutting stalks |
| JP2001245517A (en) * | 2000-03-07 | 2001-09-11 | Yutaka Kanamaru | Shaking out-type rotary knife and its blade |
| CN1593084A (en) * | 2004-07-13 | 2005-03-16 | 泰州现代农业装备有限公司 | Combine combing barrel |
| CN104838804A (en) * | 2015-05-30 | 2015-08-19 | 苗彦军 | Device and method for harvesting seed ears of plateau wild forage grass |
| CN104938151A (en) * | 2015-06-12 | 2015-09-30 | 柳州市侗天湖农业生态旅游投资有限责任公司 | Knife special for picking tea leaves |
| CN205142888U (en) * | 2015-12-07 | 2016-04-13 | 刘玉祥 | Amphibious weed cutting boat |
| CN209299737U (en) * | 2018-12-29 | 2019-08-27 | 安徽加德荫园林机械有限公司 | A kind of weeding bellows knife |
| CN211210555U (en) * | 2019-12-06 | 2020-08-11 | 西藏农牧学院 | Wild grass seed harvesting knife with double semicircular arc tooth shapes |
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