CN107124956A - A kind of design method of bionical stubble breaking knife - Google Patents
A kind of design method of bionical stubble breaking knife Download PDFInfo
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- CN107124956A CN107124956A CN201710298582.XA CN201710298582A CN107124956A CN 107124956 A CN107124956 A CN 107124956A CN 201710298582 A CN201710298582 A CN 201710298582A CN 107124956 A CN107124956 A CN 107124956A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/835—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes
- A01D34/8355—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes for cutting up or crushing remaining standing stalks, e.g. stubble
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Abstract
A kind of design method of bionical stubble breaking knife belongs to agricultural machinery technological field, and the present invention comprises the following steps：Set the geometry of stubble breaking knife：Stubble breaking knife is made up of cutter hub, handle of a knife and the basil；By setting up the equation of plane M on cutter hub, design plane M；By setting up cutter hub top-surface camber N equation, design curved surface N；Pass through the prototype curve a to being set up0b0Equation is zoomed in and out, the outer blade curve B of design stubble breaking knife；Design curve D and curve G；Pass through the equation of the set up gradual change type basil, design the basil.Stubble breaking knife designed by the present invention can save energy consumption in operation process, and can improve operating efficiency.
Description
Technical field
The invention belongs to agricultural machinery technological field, and in particular to a kind of design method of bionical stubble breaking knife.
Background technology
No-tillage seeding operation is carried out under the conditions of earth's surface has stalk and crop residue cover, by Soil Straw before sowing
Processing with stubble can be that follow-up seeding operation and seed growth provide good operating condition and kind bed environment.Stubble cutting parts are made
For stalk during no-tillage farming and the critical component of cutting corn rootstalk, it can be because by stalk, root stubble and soil in operation process
The resistance of earth comprehensive function and produce that breaking effect is not good and part phenomenon easy to wear.Therefore, to ensure its good operation
Performance, service life and economic performance are, it is necessary to which parts cutting excellent performance, anti-wear performance are high, process and installation method is easy.
Longicorn is important forest trunk borer, larval feeding trunk, imago feeding trunk or little tree branch skin and xylem,
Female adult can gnaw groove spawning on branch, and its dentes plays a part of cutting during taking food and gnawing groove, bites and chew.Light
Shoulder longicorn beetle (Anoplophora glabripennis) is the main trunk borer of the seeds such as willow, willow, elm, by right
Larvae of Anoplophora glabripennis and adult dentes morphological feature and the research of its feeding habit finds, either larva or adult,
Its equal wedgewise in maxilla end, cutting part cutting edge is to be transitioned into space by space plane into sag vertical curve, at the nearly cutting edge in cutting face
The irregular eutectic of curved surface.And it is in gradual change type that the basil of the cutting part at the adult maxilla back side, which can be observed, the basil is from outside to inside
Gradually increase.Because the form of insect is always adapted with its function, living environment, therefore, based on longicorn dentes form knot
Improvement of the bionic design of structure to no-tillage seeding stubble breaking knife performance is significant.
The content of the invention
It is an object of the invention to provide a kind of design method of bionical stubble breaking knife.Cut by imitating anoplophora glabripennis dentes
Dimension scale between toothed portion outer rim geometry, section geometry, cutting outer rim basil variation tendency and Each part
Relation, obtains a kind of design method of bionical stubble breaking knife.
The present invention comprises the following steps：
The geometry of 1.1 bionical stubble breaking knifes, is made up of cutter hub 1, handle of a knife 2 and the basil 5, and its architectural feature is from roundheaded borer
And basic parameter is obtained in the research of adult dentes feeding site structural form feature, using dentes cutting part as bionical original
Type, it is final to obtain by the measurement, fitting, analysis and optimization to blade curve, the basil and section structure, wherein：Cutter hub 1 is just
Facial contour is formed by connecting by ba curves, amn curves, np straight lines, pr camber lines and rb linear sequences, and the positive Middle face of cutter hub 1 is longitudinally set
There are rm straight lines；It is plane M that the face formed is connected by a, b, r, m, a, and it is curved surface N, stubble breaking knife that the face formed is connected by r, m, n, p, r
By the design of plane to surface blending, beneficial to the rupture and shunting of the materials to be cut such as stalk, reduce and block,；Ba curves are breaking
Outer blade curve B, amn curve of knife is that stubble breaking knife curve D, np straight line are that stubble breaking knife straight line E, rm straight line is plane M and curved surface N
Front intersecting lens, is stubble breaking knife straight line C；Cutter hub (1) negative profile is straight by jk curves, khg curves, gf straight lines, fi camber lines and ij
Line, which is linked in sequence, to be formed, and longitudinal direction is provided with ih straight lines in the middle part of the reverse side of cutter hub 1；Jk curves are stubble breaking knife inner cutter hole curve I, khg curve
For stubble breaking knife curve G, gf straight line be stubble breaking knife straight line F, ih straight line be plane M and curved surface N reverse side intersecting lens, ih is stubble breaking knife
Straight line H；
The frontal outline of handle of a knife 2 is by bb1Straight line, b1C straight lines, cq camber lines and qp1Straight line, p1P straight lines, pr camber lines and rb are straight
Line is formed by connecting, and the front of handle of a knife 2 is connected with the positive top of cutter hub 1 by pr camber lines and rb straight lines below, in the frontal outline of handle of a knife 2
B1C straight lines, cq camber lines and qp1Straight line is in the bb in same plane P, the frontal outline of handle of a knife 21Straight line, p1P straight lines, pr camber lines
Same curved surface K is in rb straight lines, wherein：Straight line p1b1It is plane P and curved surface K intersecting lens, b1C straight lines and bb1Straight line is common
Line；
The negative profile of handle of a knife 2 is by jj1Straight line, j1D straight lines, de camber lines, ef1Straight line, f1F straight lines, fi camber lines and ij straight lines
It is formed by connecting, the reverse side of handle of a knife 2 is connected with the reverse side top of cutter hub 1 by fi camber lines and ij straight lines below, in the negative profile of handle of a knife 2
j1D straight lines, de camber lines and ef1Straight line is in the jj in same plane P ', the negative profile of handle of a knife 21Straight line, f1F straight lines, fi camber lines
Same curved surface K ' is in ij straight lines, wherein：Straight line j1f1It is plane P ' and curved surface K ' intersecting lens；
Point b is an intersection point between curved surface K and plane M, and with straight line b1The common sides of c；
Handle of a knife 2 is provided with hole I 3 and hole II 4；
Plane M described in design procedure 1.1：With the front outline of handle of a knife 2 and the front outline intersection point b points of cutter hub 1
For origin O ', straight line b1B is that the plane P on X ' axles, the frontal outline of handle of a knife 2 is X ' O ' Z ' coordinate surfaces, sets up three-dimensional system of coordinate
O '-X ' Y ' Z ', plane M equation is：
Wherein：h4For the length of rb straight lines；β is the angle of plane M and X ' O ' Z ' coordinate surfaces；
Curved surface N described in design procedure 1.1:Equations of the curved surface N in three-dimensional system of coordinate O '-X ' Y ' Z ' be：
0≤x'≤
990k,
Wherein：h4For the length of rb straight lines；hp' it is that the midpoint p ' of rp camber lines arrives the distance of r points and p point lines；R1For pr arcs
The radius R of line1；h4=1.33h5, h5For the midpoint M ' on blade curve ab to point a and point b lines distance；
Cutter hub 1 and the junction section of handle of a knife 2 are in coordinate system O ' Y ' Z ', projection width h of the b points to p points in Z ' axles6=
4.15h5；The midpoint p ' of rp camber lines is to r points and p point lines apart from hP’=0.2h6；
The radius R of pr camber lines1Met with the angle β of plane M and X ' O ' Z ' coordinate surfaces：
Wherein：h6For interior, projection width of the b points to p points in Z ' axles in coordinate system O ' Y ' Z '；
The prototype curve a of the outer blade curve B of stubble breaking knife described in design procedure 1.10b0Equation is：
F (x)=0.000535x2- 0.55x+7.037,0≤x≤990mm
X effective unit is pixel in prototype equation, for the ease of design, can be translated into mm；
Stubble breaking knife should meet blade curve length more than the maximum cutting arc length needed for operation process in operation process,
Pass through the analysis to blade end points movement locus in stubble breaking knife operation process, it can be deduced that the maximum cutting needed for operation process
Arc length LmaxFor：
Wherein：R is stubble breaking knife external diameter；h1For toothing and straw mulching layer thickness；h2For stubble breaking knife embedded depth；h3For root
Stubble depth；
Using b points as the origin of coordinates, plane where plane M is that straight line is Y-axis where XOY, straight line br, and the positive direction of X-axis is
Stubble breaking knife starting breaking cutting edge a direction is pointed to by origin b, in the case of known elemental operation condition, equation can be obtained
Zoom factor k, by carrying out equal proportion scaling to blade curve prototype Equation f (x), obtains the outer blade curve B of stubble breaking knife side
Cheng Wei：
F (x) _ 1=k [0.000535 (x/k)2- 0.55 (x/k)+7.037], 0≤x≤990kmm, and meet L ' >=Lmax；
Wherein：K is equation zoom factor, in order to ensure smooth effective progress of breaking operation, k=L/Lmax, L is curve
Length of curve of the Equation f (x) in interval [0,990mm]；Equation f (x) _ 1 that L ' is the outer blade curve B of stubble breaking knife it is interval [0,
990kmm] length of curve；h5The distance of point a and point b lines is arrived for the midpoint M ' on blade curve ab, and
Curve D and curve G described in design procedure 1.1：
Curve D and curve G are the identical convex arc on the frontal outline plane P of cutter hub handle 2, and point a on curve D, point m,
Point g, point h, point k on point n and curve G are located at same curved surface, and curve D crosses point g, point n, point m and point a, curve G cross point a, point k,
Point h, point g, curve D and curve G convex arc radius of curvature are met：
lab/ 2 ＜ ρ ＜ 2lab
Wherein：IabBe blade curve B outside stubble breaking knife in interval [0,990k mm] scant length, i.e. point a and point b lines are long
Degree；
The basil 5 described in design procedure 1.1：The basil 5 is the gradual change type basil, and the basil 5 is originated by the breaking cutting edge of cutter hub 1
Point a is linearly increasing to breaking cutting edge terminating point b, and the basil is along the ever-increasing design in blade curve direction so that as breaking is made
The progress of industry, the incision width of stubble breaking knife gradually increases along blade curve direction, in favor of splitting incision material to be cut, and then improves
The basil α of any point in breaking efficiency, and breaking cutting edgeiMeet following mathematic(al) representation：
Wherein：α0For the basil at breaking cutting edge starting point a, and 22 °≤α0≤35°；αnAt breaking cutting edge terminating point b
The basil, and αn>α0；IiFor the length of curve at any point on blade curve to breaking edge starting point a, L is outside stubble breaking knife
Length of curve of blade curve B Equation f (x) _ 1 at interval [0,990k mm].
Stubble breaking knife designed by the present invention, can be achieved it and energy consumption is saved in operation process, improve operating efficiency.
Brief description of the drawings
Fig. 1 is the design method flow chart of bionical stubble breaking knife
Fig. 2 is the axonometric drawing (forward sight) of bionical stubble breaking knife
Fig. 3 is the axonometric drawing (backsight) of bionical stubble breaking knife
Fig. 4 is the schematic diagram of coordinate system where plane M and curved surface N on bionical stubble breaking knife cutter hub
Fig. 5 is the scale diagrams of Section A-A in Fig. 4
Fig. 6 is bionical stubble breaking knife blade curve equation schematic diagram
Fig. 7 is that stubble breaking knife cuts stalk and root stubble process schematic
Fig. 8 is bionical stubble breaking knife cutter hub upper curve D and curve G structural representation
Fig. 9 is gradual change type basil structural representation
Wherein：1. e. terminates breaking sword at the basil a. of 2. handle of a knife of cutter hub, 3. hole, I 4. hole II 5. starting breaking cutting edges
S. toothings and straw mulching layer t. surface layer u. stubble breaking knife underground layers at mouthful
Embodiment
The present invention is described further below in conjunction with the accompanying drawings.
As shown in figure 1, the present invention comprises the following steps：
1.1 as depicted in figs. 1 and 2, the geometry of bionical stubble breaking knife, is made up of cutter hub 1, handle of a knife 2 and the basil 5, and it is tied
Structure feature obtains basic parameter from the research of roundheaded borer and adult dentes feeding site structural form feature, with dentes
Cutting part is bionical prototype, by the measurement, fitting, analysis and optimization to blade curve, the basil and section structure, is finally obtained
, wherein：The frontal outline of cutter hub 1 is formed by connecting by ba curves, amn curves, np straight lines, pr camber lines and rb linear sequences, cutter hub 1
Positive Middle face is longitudinally provided with rm straight lines；It is plane M that the face formed is connected by a, b, r, m, a, and the face formed is connected by r, m, n, p, r
For curved surface N, stubble breaking knife, beneficial to the rupture and shunting of the materials to be cut such as stalk, is reduced stifled by the design of plane to surface blending
Plug,；Ba curves are that outer blade curve B, amn curve of stubble breaking knife is that stubble breaking knife curve D, np straight line are stubble breaking knife straight line E, rm straight line
That is plane M and curved surface N front intersecting lens, is stubble breaking knife straight line C；Cutter hub (1) negative profile is straight by jk curves, khg curves, gf
Line, fi camber lines and ij linear sequences are formed by connecting, and longitudinal direction is provided with ih straight lines in the middle part of the reverse side of cutter hub 1；Jk curves are stubble breaking knife inner edge
Mouthful curve I, khg curve be stubble breaking knife curve G, gf straight line be stubble breaking knife straight line F, ih straight line be plane M and curved surface N reverse side phase
Intersection, ih is stubble breaking knife straight line H；
The frontal outline of handle of a knife 2 is by bb1Straight line, b1C straight lines, cq camber lines and qp1Straight line, p1P straight lines, pr camber lines and rb are straight
Line is formed by connecting, and the front of handle of a knife 2 is connected with the positive top of cutter hub 1 by pr camber lines and rb straight lines below, in the frontal outline of handle of a knife 2
B1C straight lines, cq camber lines and qp1Straight line is in the bb in same plane P, the frontal outline of handle of a knife 21Straight line, p1P straight lines, pr camber lines
Same curved surface K is in rb straight lines, wherein：Straight line p1b1It is plane P and curved surface K intersecting lens, b1C straight lines and bb1Straight line is common
Line；
The negative profile of handle of a knife 2 is by jj1Straight line, j1D straight lines, de camber lines, ef1Straight line, f1F straight lines, fi camber lines and ij straight lines
It is formed by connecting, the reverse side of handle of a knife 2 is connected with the reverse side top of cutter hub 1 by fi camber lines and ij straight lines below, in the negative profile of handle of a knife 2
j1D straight lines, de camber lines and ef1Straight line is in the jj in same plane P ', the negative profile of handle of a knife 21Straight line, f1F straight lines, fi camber lines
Same curved surface K ' is in ij straight lines, wherein：Straight line j1f1It is plane P ' and curved surface K ' intersecting lens；
Point b is an intersection point between curved surface K and plane M, and with straight line b1The common sides of c；
Handle of a knife 2 is provided with hole I 3 and hole II 4；
As shown in Figure 4 and Figure 5, the plane M described in design procedure 1.1：With the front outline and cutter hub 1 of handle of a knife 2 just
Face outline intersection point b points are origin O ', straight line b1B is that the plane P on X ' axles, the frontal outline of handle of a knife 2 is X ' O ' Z ' coordinate surfaces, is built
Three-dimensional system of coordinate O '-X ' Y ' Z ' are found, plane M equation is：
Wherein：h4For the length of rb straight lines；β is the angle of plane M and X ' O ' Z ' coordinate surfaces；
As shown in Figure 4 and Figure 5, the curved surface N described in design procedure 1.1:Curved surface N is in three-dimensional system of coordinate O '-X ' Y ' Z '
Equation is：
0≤x'≤
990k,
Wherein：h4For the length of rb straight lines；hp' it is that the midpoint p ' of rp camber lines arrives the distance of r points and p point lines；R1For pr arcs
The radius R of line1；h4=1.33h5, h5For the midpoint M ' on blade curve ab to point a and point b lines distance；
Cutter hub 1 and the junction section of handle of a knife 2 are in coordinate system O ' Y ' Z ', projection width h of the b points to p points in Z ' axles6=
4.15h5；The midpoint p ' of rp camber lines is to r points and p point lines apart from hP’=0.2h6；
The radius R of pr camber lines1Met with the angle β of plane M and X ' O ' Z ' coordinate surfaces：
Wherein：h6For interior, projection width of the b points to p points in Z ' axles in coordinate system O ' Y ' Z '；
As shown in Figure 6 and Figure 7, described in design procedure 1.1 the outer blade curve B of stubble breaking knife prototype curve a0b0Equation
For：
F (x)=0.000535x2- 0.55x+7.037,0≤x≤990mm
X effective unit is pixel in prototype equation, for the ease of design, can be translated into mm；
Stubble breaking knife should meet blade curve length more than the maximum cutting arc length needed for operation process in operation process,
Pass through the analysis to blade end points movement locus in stubble breaking knife operation process, it can be deduced that the maximum cutting needed for operation process
Arc length LmaxFor：
Wherein：R is stubble breaking knife external diameter；h1For toothing and straw mulching layer thickness；h2For stubble breaking knife embedded depth；h3For root
Stubble depth；
Using b points as the origin of coordinates, plane where plane M is that straight line is Y-axis where XOY, straight line br, and the positive direction of X-axis is
Stubble breaking knife starting breaking cutting edge a direction is pointed to by origin b, in the case of known elemental operation condition, equation can be obtained
Zoom factor k, by carrying out equal proportion scaling to blade curve prototype Equation f (x), obtains the outer blade curve B of stubble breaking knife side
Cheng Wei：
F (x) _ 1=k [0.000535 (x/k)2- 0.55 (x/k)+7.037], 0≤x≤990kmm, and meet L ' >=Lmax；
Wherein：K is equation zoom factor, in order to ensure smooth effective progress of breaking operation, k=L/Lmax, L is curve
Length of curve of the Equation f (x) in interval [0,990mm]；Equation f (x) _ 1 that L ' is the outer blade curve B of stubble breaking knife it is interval [0,
990kmm] length of curve；h5The distance of point a and point b lines is arrived for the midpoint M ' on blade curve ab, and
As shown in figure 8, curve D and curve G described in design procedure 1.1：
Curve D and curve G are the identical convex arc on the frontal outline plane P of cutter hub handle 2, and point a on curve D, point m,
Point g, point h, point k on point n and curve G are located at same curved surface, and curve D crosses point g, point n, point m and point a, curve G cross point a, point k,
Point h, point g, curve D and curve G convex arc radius of curvature are met：
lab/ 2 ＜ ρ ＜ 2lab
Wherein：IabBe blade curve B outside stubble breaking knife in interval [0,990k mm] scant length, i.e. point a and point b lines are long
Degree；
As shown in figure 9, the basil 5 described in design procedure 1.1：The basil 5 is the gradual change type basil, and the basil 5 is by the broken of cutter hub 1
Stubble cutting edge starting point a is linearly increasing to breaking cutting edge terminating point b, and the basil is along the ever-increasing design in blade curve direction so that
With the progress of breaking operation, the incision width of stubble breaking knife gradually increases along blade curve direction, is cut in favor of splitting to cut
Thing, and then improve the basil α of any point in breaking efficiency, and breaking cutting edgeiMeet following mathematic(al) representation：
Wherein：α0For the basil at breaking cutting edge starting point a, and 22 °≤α0≤35°；αnAt breaking cutting edge terminating point b
The basil, and αn>α0；IiFor the length of curve at any point on blade curve to breaking edge starting point a, L is outside stubble breaking knife
Length of curve of blade curve B Equation f (x) _ 1 at interval [0,990k mm].
Claims (1)
1. a kind of design method of bionical stubble breaking knife, it is characterised in that comprise the following steps：
The geometry of 1.1 setting stubble breaking knifes：Stubble breaking knife is made up of cutter hub (1), handle of a knife (2) and the basil (5), wherein：
Cutter hub (1) frontal outline is formed by connecting by ba curves, amn curves, np straight lines, pr camber lines and rb linear sequences, cutter hub (1)
Positive Middle face is longitudinally provided with rm straight lines；It is plane M that the face formed is connected by a, b, r, m, a, and the face formed is connected by r, m, n, p, r
For curved surface N；Ba curves are that outer blade curve B, amn curve of stubble breaking knife is that stubble breaking knife curve D, np straight line are stubble breaking knife straight line E, rm
Straight line is plane M and curved surface N front intersecting lens, is stubble breaking knife straight line C；Cutter hub (1) negative profile by jk curves, khg curves,
Gf straight lines, fi camber lines and ij linear sequences are formed by connecting, and longitudinal direction is provided with ih straight lines in the middle part of cutter hub (1) reverse side；Jk curves are breaking
Knife inner cutter hole curve I, khg curve are that stubble breaking knife curve G, gf straight line are that stubble breaking knife straight line F, ih straight line is plane M and curved surface N
Reverse side intersecting lens, ih is stubble breaking knife straight line H；The frontal outline of handle of a knife (2) is by bb1Straight line, b1C straight lines, cq camber lines and qp1Straight line,
p1P straight lines, pr camber lines and rb straight lines are formed by connecting, and the front of handle of a knife (2) is below with the positive top of cutter hub (1) by pr camber lines and rb
Straight line is connected, the b in handle of a knife (2) frontal outline1C straight lines, cq camber lines and qp1Straight line is in same plane P, handle of a knife (2) front wheel
Bb in exterior feature1Straight line, p1P straight lines, pr camber lines and rb straight lines are in same curved surface K, wherein:Straight line p1b1It is plane P and curved surface K
Intersecting lens, b1C straight lines and bb1Straight line is conllinear；The negative profile of handle of a knife (2) is by jj1Straight line, j1D straight lines, de camber lines, ef1Directly
Line, f1F straight lines, fi camber lines and ij straight lines are formed by connecting, and the reverse side of handle of a knife (2) is below with cutter hub (1) reverse side top by fi camber lines
Connected with ij straight lines, the j in handle of a knife (2) negative profile1D straight lines, de camber lines and ef1Straight line is in same plane P ', handle of a knife (2)
Jj in negative profile1Straight line, f1F straight lines, fi camber lines and ij straight lines are in same curved surface K ', wherein：Straight line j1f1It is plane P '
With curved surface K ' intersecting lens；Point b is an intersection point between curved surface K and plane M, and with straight line b1The common sides of c；Handle of a knife is set on (2)
There are hole I (3) and hole II (4)；
Plane M described in 1.2 design procedures 1.1：With the front outline of handle of a knife (2) and the front outline intersection point b of cutter hub (1)
Point is origin O ', straight line b1B is that the plane P on X ' axles, handle of a knife (2) frontal outline is X ' O ' Z ' coordinate surfaces, sets up three-dimensional coordinate
It is O '-X ' Y ' Z ', plane M equation is：
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Wherein：h4For the length of rb straight lines；β is the angle of plane M and X ' O ' Z ' coordinate surfaces；
Curved surface N described in 1.3 design procedures 1.1:Equations of the curved surface N in three-dimensional system of coordinate O '-X ' Y ' Z ' be：
0≤x'≤990k,
Wherein：h4For the length of rb straight lines；hp' it is that the midpoint p ' of rp camber lines arrives the distance of r points and p point lines；R1For pr camber lines
Radius R1；h4=1.33h5, h5For the midpoint M ' on blade curve ab to point a and point b lines distance；
Cutter hub (1) and handle of a knife (2) junction section are in coordinate system O ' Y ' Z ', projection width h of the b points to p points in Z ' axles6=
4.15h5；The midpoint p ' of rp camber lines is to r points and p point lines apart from hP’=0.2h6；
The radius R of pr camber lines1Met with the angle β of plane M and X ' O ' Z ' coordinate surfaces：
Wherein：h6For interior, projection width of the b points to p points in Z ' axles in coordinate system O ' Y ' Z '；
The prototype curve a of the outer blade curve B of stubble breaking knife described in 1.4 design procedures 1.10b0Equation is：
F (x)=0.000535x2- 0.55x+7.037,0≤x≤990mm
Maximum cutting arc length L needed for operation processmaxFor：
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<mo>+</mo>
<msub>
<mi>h</mi>
<mn>3</mn>
</msub>
</mrow>
<mi>R</mi>
</mfrac>
<mo>&rsqb;</mo>
</mrow>
Wherein：R is stubble breaking knife external diameter；h1For toothing and straw mulching layer thickness；h2For stubble breaking knife embedded depth；h3It is deep for root stubble
Degree；
Using b points as the origin of coordinates, plane where plane M is that straight line where XOY, straight line br is Y-axis, and the positive direction of X-axis is by original
Point b points to stubble breaking knife starting breaking cutting edge a direction, by carrying out equal proportion scaling to blade curve prototype Equation f (x), obtains
Blade curve B equation is outside to stubble breaking knife：
F (x) _ 1=k [0.000535 (x/k)2- 0.55 (x/k)+7.037], 0≤x≤990k mm, and meet L ' >=Lmax；
Wherein：K is equation zoom factor, k=L/Lmax, L is lengths of curve of the curvilinear equation f (x) in interval [0,990mm]；L’
For blade curve B outside stubble breaking knife Equation f (x) _ 1 interval [0,990k mm] length of curve；h5For on blade curve ab
Midpoint M ' to point a and point b lines distance, and
Curve D and curve G described in 1.5 design procedures 1.1：
Curve D and curve G are the identical convex arc on cutter hub handle (2) frontal outline plane P, and point a, point m, point n on curve D
It is located at same curved surface with the point g on curve G, point h, point k, curve D crosses point g, point n, point m and point a, curve G and crosses point a, point k, point
H, point g, curve D and curve G convex arc radius of curvature are met：
lab/ 2 ＜ ρ ＜ 2lab
Wherein：IabIt is blade curve B outside stubble breaking knife in interval [0,990k mm] scant length, i.e. point a and point b wire lengths；
The basil (5) described in 1.6 design procedures 1.1：
The basil (5) is the gradual change type basil, and the basil (5) is by the breaking cutting edge starting point a of cutter hub (1) to breaking cutting edge terminating point b lines
Property increase, and in breaking cutting edge any point basil αiMeet following mathematic(al) representation：
<mrow>
<msub>
<mi>&alpha;</mi>
<mi>i</mi>
</msub>
<mo>=</mo>
<msub>
<mi>&alpha;</mi>
<mn>0</mn>
</msub>
<mo>+</mo>
<mrow>
<mo>(</mo>
<mfrac>
<mrow>
<msub>
<mi>&alpha;</mi>
<mi>n</mi>
</msub>
<mo>-</mo>
<msub>
<mi>&alpha;</mi>
<mn>0</mn>
</msub>
</mrow>
<mi>L</mi>
</mfrac>
<mo>)</mo>
</mrow>
<msub>
<mi>l</mi>
<mi>i</mi>
</msub>
<mo>,</mo>
<mn>0</mn>
<mo>&le;</mo>
<msub>
<mi>l</mi>
<mi>i</mi>
</msub>
<mo>&le;</mo>
<mi>L</mi>
</mrow>
Wherein：α0For the basil at breaking cutting edge starting point a, and 22 °≤α0≤35°；αnFor the sword at breaking cutting edge terminating point b
Angle, and αn>α0；IiFor the length of curve at any point on blade curve to breaking edge starting point a, L is the outer cutting edge of stubble breaking knife
Length of curve of curve B Equation f (x) _ 1 at interval [0,990k mm].
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110587667A (en) * | 2019-09-19 | 2019-12-20 | 上海海洋大学 | Mussel dissection cutter with cutter board curvature self-adaptive to shell shape |
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|---|---|---|---|---|
| CN1969599A (en) * | 2006-12-06 | 2007-05-30 | 吉林大学 | Bionic rotary-cutting and stubble-breaking blade |
| CN2932949Y (en) * | 2006-07-28 | 2007-08-15 | 姜明海 | Slurry-stirring blade for stubber-burying of paddy field |
| CN101258793A (en) * | 2008-04-24 | 2008-09-10 | 吉林大学 | Bionic drag reduction stubbling knife and design method thereof |
| CN101548592A (en) * | 2009-05-04 | 2009-10-07 | 吉林大学 | Cultivation rotation working part with bionic geometric structure |
| CN102326468A (en) * | 2011-03-25 | 2012-01-25 | 吉林大学 | Bionic wear-resisting deep-digging shovel blade |
| CN202587810U (en) * | 2012-01-12 | 2012-12-12 | 新疆农垦科学院 | Blade stubble-cutting furrow opener |
-
2017
- 2017-05-02 CN CN201710298582.XA patent/CN107124956B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2932949Y (en) * | 2006-07-28 | 2007-08-15 | 姜明海 | Slurry-stirring blade for stubber-burying of paddy field |
| CN1969599A (en) * | 2006-12-06 | 2007-05-30 | 吉林大学 | Bionic rotary-cutting and stubble-breaking blade |
| CN101258793A (en) * | 2008-04-24 | 2008-09-10 | 吉林大学 | Bionic drag reduction stubbling knife and design method thereof |
| CN101548592A (en) * | 2009-05-04 | 2009-10-07 | 吉林大学 | Cultivation rotation working part with bionic geometric structure |
| CN102326468A (en) * | 2011-03-25 | 2012-01-25 | 吉林大学 | Bionic wear-resisting deep-digging shovel blade |
| CN202587810U (en) * | 2012-01-12 | 2012-12-12 | 新疆农垦科学院 | Blade stubble-cutting furrow opener |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110587667A (en) * | 2019-09-19 | 2019-12-20 | 上海海洋大学 | Mussel dissection cutter with cutter board curvature self-adaptive to shell shape |
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