CN107124956B - 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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- 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 category agricultural machinery technological field of bionical stubble breaking knife, the present invention include the following steps: the geometry for setting stubble breaking knife: stubble breaking knife is made of cutter hub, knife handle and the basil；By establishing the equation of plane M on cutter hub, design plane M；By establishing the equation of cutter hub top-surface camber N, curved surface N is designed；By to the prototype curve a established0b0Equation zooms in and out, the outer blade curve B of design stubble breaking knife；Design curve D and curve G；By the equation for the gradual change type basil established, the basil is designed.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 fields, and in particular to a kind of design method of bionical stubble breaking knife.
Background technique
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 provide good operating condition and kind bed environment for subsequent seeding operation and seed growth.Stubble cutting parts are made
It, can be because by stalk, root stubble and soil in operation process for the critical component of stalk during no-tillage farming and cutting corn rootstalk
The resistance of earth comprehensive function and generate that breaking is ineffective and component phenomenon easy to wear.Therefore, to guarantee its good operation
Performance, service life and economic performance need parts cutting excellent performance, wear-resisting property height, processing and installation method easy.
Longicorn is important forest trunk borer, larval feeding trunk, imago feeding trunk or little tree branch skin and xylem,
Female adult can gnaw slot oviposition on branch, and dentes play the role of cutting, bite and chewing in feeding and gnaw slot during.Light
Shoulder longicorn beetle (Anoplophora glabripennis) is the main trunk borer of the tree species such as poplar, willow, elm, by right
Larvae of Anoplophora glabripennis and adult dentes morphological feature and its feeding habit the study found that either larva or adult,
Its equal wedgewise in maxilla end, cutting part cutting edge are transitioned into space by space plane at the nearly cutting edge in cutting face at concave curve
The irregular eutectic of curved surface.And the basil that the cutting part at the adult maxilla back side can be observed is in gradual change type, the basil is from outside to inside
It is gradually increased.Since the form of insect is always adapted with its function, living environment, it is based on longicorn dentes form knot
The bionic design of structure is of great significance to the improvement of no-tillage seeding stubble breaking knife performance.
Summary of the invention
The object of the present invention is to provide a kind of design methods of bionical stubble breaking knife.It is 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
Relationship obtains a kind of design method of bionical stubble breaking knife.
The present invention includes the following steps:
The geometry of 1.1 bionical stubble breaking knifes is made of cutter hub 1, knife handle 2 and the basil 5, and structure feature is from roundheaded borer
And basic parameter is obtained in the research of adult dentes feeding site structural form feature, with dentes cutting part for bionical original
Type, it is final to obtain, in which: cutter hub 1 is just by the measurement to blade curve, the basil and section structure, fitting, analysis and optimization
Facial contour is formed by connecting by ba curve, amn curve, np straight line, pr camber line and rb linear sequence, and the positive Middle face of cutter hub 1 is longitudinally set
There is rm straight line；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
Blocking is reduced conducive to the rupture and shunting of the materials to be cut such as stalk by the design of plane to surface blending,；Ba curve is breaking
It is stubble breaking knife straight line E, rm straight line, that is, plane M and curved surface N that outer blade curve B, amn curve of knife, which is stubble breaking knife curve D, np straight line,
Front intersecting lens is stubble breaking knife straight line C；Cutter hub (1) negative profile is straight by jk curve, khg curve, gf straight line, fi camber line and ij
Line is linked in sequence, longitudinal in the middle part of 1 reverse side of cutter hub to be equipped with ih straight line；Jk curve is stubble breaking knife inner cutter hole curve I, khg curve
The reverse side intersecting lens for being stubble breaking knife straight line F, ih straight line, that is, plane M and curved surface N for stubble breaking knife curve G, gf straight line, ih are stubble breaking knife
Straight line H；
The frontal outline of knife handle 2 is by bb1Straight line, b1C straight line, cq camber line and qp1Straight line, p1P straight line, pr camber line and rb are straight
Line is formed by connecting, and the front of knife handle 2 is connect with the positive top of cutter hub 1 by pr camber line and rb straight line below, in 2 frontal outline of knife handle
B1C straight line, cq camber line and qp1Straight line is in same plane P, the bb in 2 frontal outline of knife handle1Straight line, p1P straight line, pr camber line
Same curved surface K is in rb straight line, in which: straight line p1b1It is the intersecting lens of plane P Yu curved surface K, b1C straight line and bb1Straight line is total
Line；
The negative profile of knife handle 2 is by jj1Straight line, j1D straight line, de camber line, ef1Straight line, f1F straight line, fi camber line and ij straight line
It is formed by connecting, the reverse side of knife handle 2 is connect with 1 reverse side top of cutter hub by fi camber line and ij straight line below, in 2 negative profile of knife handle
j1D straight line, de camber line and ef1Straight line is in same plane P ', the jj in 2 negative profile of knife handle1Straight line, f1F straight line, fi camber line
Same curved surface K ' is in ij straight line, in which: straight line j1f1It is the intersecting lens of plane P ' Yu curved surface K '；
An intersection point of the point b between curved surface K and plane M, and with straight line b1C is total to side；
Knife handle 2 is equipped with hole I 3 and hole II 4；
Plane M described in design procedure 1.1: with the front outer profile intersection point b point of the front outer profile of knife handle 2 and cutter hub 1
For origin O ', straight line b1B is X ' axis, and the plane P on 2 frontal outline of knife handle is X ' O ' Z ' coordinate surface, establishes three-dimensional system of coordinate
O '-X ' Y ' Z ', the equation of plane M are as follows:
Wherein: h4For the length of rb straight line；β is the angle of plane M and X ' O ' Z ' coordinate surface；
Curved surface N described in design procedure 1.1: the curved surface N equation in three-dimensional system of coordinate O '-X ' Y ' Z ' are as follows:
0≤x'≤
990k,
Wherein: h4For the length of rb straight line；hp' it is midpoint p ' Dao the r point of rp camber line and the distance of p point line；R1For pr arc
The radius R of line1；h4=1.33h5, h5For the distance of midpoint M ' Dao point a and point b line on blade curve ab；
Cutter hub 1 and 2 junction section of knife handle are in coordinate system O ' Y ' Z ', projection width h of the b point to p point in Z ' axis6=
4.15h5；Midpoint p ' Dao the r point of rp camber line and the distance h of p point lineP’=0.2h6；
The radius R of pr camber line1Meet with the angle β of plane M and X ' O ' Z ' coordinate surface:
Wherein: h6For interior, projection width of the b point to p point in Z ' axis 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 are as follows:
F (x)=0.000535x2- 0.55x+7.037,0≤x≤990mm
In prototype equation the effective unit of x be pixel, for the ease of design, mm can be translated into；
Stubble breaking knife should meet blade curve length in operation process and cut arc length greater than maximum needed for operation process,
Pass through the analysis to blade endpoint motion profile in stubble breaking knife operation process, it can be deduced that the cutting of maximum needed for operation process
Arc length LmaxAre as follows:
Wherein: R is stubble breaking knife outer diameter；h1For toothing and straw mulching layer thickness；h2For stubble breaking knife embedded depth；h3For root
Stubble depth；
Using b point as coordinate origin, plane where plane M is XOY, and straight line is Y-axis where straight line br, and the positive direction of X-axis is
The direction of stubble breaking knife starting breaking cutting edge a, in the case where known elemental operation condition, available equation are directed toward by origin b
Zoom factor k obtains the side of the outer blade curve B of stubble breaking knife by carrying out equal proportion scaling to blade curve prototype Equation f (x)
Journey are as follows:
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 guarantee smooth effective progress of breaking operation, k=L/Lmax, L is curve
Length of curve of the Equation f (x) in section [0,990mm]；Equation f (x) _ 1 that L ' is the outer blade curve B of stubble breaking knife section [0,
990kmm] length of curve；h5For on blade curve ab midpoint M ' Dao point a and point b line distance, and
Curve D described in design procedure 1.1 and curve G:
Curve D and curve G is the identical convex arc on 2 frontal outline plane P of cutter hub handle, 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,
The convex arc radius of curvature satisfaction of point h, point g, curve D and curve G:
lab/ 2 < ρ < 2lab
Wherein: IabIt is blade curve B outside stubble breaking knife in section [0,990k mm] scant length, i.e. point a and point b line 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 incision width of the progress of industry, stubble breaking knife is gradually increased along blade curve direction, in favor of splitting incision material to be cut, and then is improved
Breaking efficiency, and in breaking cutting edge any point basil αiMeet 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 length of curve of any point on blade curve at breaking edge starting point a, L is outside stubble breaking knife
Length of curve of Equation f (x) _ 1 of blade curve B in section [0,990k mm].
Stubble breaking knife designed by the present invention is, it can be achieved that it saves energy consumption, raising operating efficiency in operation process.
Detailed description of the invention
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 the structural schematic diagram of bionical stubble breaking knife cutter hub upper curve D and curve G
Fig. 9 is gradual change type basil structural schematic diagram
Wherein: 1. cutter hub, 2. knife handle, 3. hole, I 4. hole, II 5. basil a. originates e. at breaking cutting edge and terminates breaking sword
S. toothing and straw mulching layer t. surface layer u. stubble breaking knife underground layer at mouthful
Specific embodiment
The present invention is described further with reference to the accompanying drawing.
As shown in Figure 1, the present invention includes the following steps:
1.1 as depicted in figs. 1 and 2, and the geometry of bionical stubble breaking knife is made of cutter hub 1, knife handle 2 and the basil 5, knot
Structure feature obtains basic parameter from the research of roundheaded borer and adult dentes feeding site structural form feature, with dentes
Cutting part is that bionical prototype is finally obtained by the measurement to blade curve, the basil and section structure, fitting, analysis and optimization
, in which: 1 frontal outline of cutter hub is formed by connecting by ba curve, amn curve, np straight line, pr camber line and rb linear sequence, cutter hub 1
Positive Middle face is longitudinally equipped with rm straight line；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 is reduced stifled by the design of plane to surface blending conducive to the rupture and shunting of the materials to be cut such as stalk
Plug,；It is stubble breaking knife straight line E, rm straight line that ba curve, which is that blade curve B, amn curve is stubble breaking knife curve D, np straight line outside stubble breaking knife,
That is the front intersecting lens of plane M and curved surface N is stubble breaking knife straight line C；Cutter hub (1) negative profile is straight by jk curve, khg curve, gf
Line, fi camber line and ij linear sequence are formed by connecting, longitudinal in the middle part of 1 reverse side of cutter hub to be equipped with ih straight line；Jk curve is stubble breaking knife inner edge
Mouth curve I, khg curve is the reverse side phase that stubble breaking knife curve G, gf straight line is stubble breaking knife straight line F, ih straight line, that is, plane M and curved surface N
Intersection, ih are stubble breaking knife straight line H；
The frontal outline of knife handle 2 is by bb1Straight line, b1C straight line, cq camber line and qp1Straight line, p1P straight line, pr camber line and rb are straight
Line is formed by connecting, and the front of knife handle 2 is connect with the positive top of cutter hub 1 by pr camber line and rb straight line below, in 2 frontal outline of knife handle
B1C straight line, cq camber line and qp1Straight line is in same plane P, the bb in 2 frontal outline of knife handle1Straight line, p1P straight line, pr camber line
Same curved surface K is in rb straight line, in which: straight line p1b1It is the intersecting lens of plane P Yu curved surface K, b1C straight line and bb1Straight line is total
Line；
The negative profile of knife handle 2 is by jj1Straight line, j1D straight line, de camber line, ef1Straight line, f1F straight line, fi camber line and ij straight line
It is formed by connecting, the reverse side of knife handle 2 is connect with 1 reverse side top of cutter hub by fi camber line and ij straight line below, in 2 negative profile of knife handle
j1D straight line, de camber line and ef1Straight line is in same plane P ', the jj in 2 negative profile of knife handle1Straight line, f1F straight line, fi camber line
Same curved surface K ' is in ij straight line, in which: straight line j1f1It is the intersecting lens of plane P ' Yu curved surface K '；
An intersection point of the point b between curved surface K and plane M, and with straight line b1C is total to side；
Knife handle 2 is equipped with hole I 3 and hole II 4；
As shown in Figure 4 and Figure 5, plane M described in design procedure 1.1: just with the front outer profile of knife handle 2 and cutter hub 1
Face outer profile intersection point b point is origin O ', straight line b1B is X ' axis, and the plane P on 2 frontal outline of knife handle is X ' O ' Z ' coordinate surface, is built
Vertical three-dimensional system of coordinate O '-X ' Y ' Z ', the equation of plane M are as follows:
Wherein: h4For the length of rb straight line；β is the angle of plane M and X ' O ' Z ' coordinate surface；
As shown in Figure 4 and Figure 5, curved surface N described in design procedure 1.1: curved surface N in three-dimensional system of coordinate O '-X ' Y ' Z '
Equation are as follows:
0≤x'≤
990k,
Wherein: h4For the length of rb straight line；hp' it is midpoint p ' Dao the r point of rp camber line and the distance of p point line；R1For pr arc
The radius R of line1；h4=1.33h5, h5For the distance of midpoint M ' Dao point a and point b line on blade curve ab；
Cutter hub 1 and 2 junction section of knife handle are in coordinate system O ' Y ' Z ', projection width h of the b point to p point in Z ' axis6=
4.15h5；Midpoint p ' Dao the r point of rp camber line and the distance h of p point lineP’=0.2h6；
The radius R of pr camber line1Meet with the angle β of plane M and X ' O ' Z ' coordinate surface:
Wherein: h6For interior, projection width of the b point to p point in Z ' axis in coordinate system O ' Y ' Z '；
As shown in Figure 6 and Figure 7, the prototype curve a of the outer blade curve B of stubble breaking knife described in design procedure 1.10b0Equation
Are as follows:
F (x)=0.000535x2- 0.55x+7.037,0≤x≤990mm
In prototype equation the effective unit of x be pixel, for the ease of design, mm can be translated into；
Stubble breaking knife should meet blade curve length in operation process and cut arc length greater than maximum needed for operation process,
Pass through the analysis to blade endpoint motion profile in stubble breaking knife operation process, it can be deduced that the cutting of maximum needed for operation process
Arc length LmaxAre as follows:
Wherein: R is stubble breaking knife outer diameter；h1For toothing and straw mulching layer thickness；h2For stubble breaking knife embedded depth；h3For root
Stubble depth；
Using b point as coordinate origin, plane where plane M is XOY, and straight line is Y-axis where straight line br, and the positive direction of X-axis is
The direction of stubble breaking knife starting breaking cutting edge a, in the case where known elemental operation condition, available equation are directed toward by origin b
Zoom factor k obtains the side of the outer blade curve B of stubble breaking knife by carrying out equal proportion scaling to blade curve prototype Equation f (x)
Journey are as follows:
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 guarantee smooth effective progress of breaking operation, k=L/Lmax, L is curve
Length of curve of the Equation f (x) in section [0,990mm]；Equation f (x) _ 1 that L ' is the outer blade curve B of stubble breaking knife section [0,
990kmm] length of curve；h5For on blade curve ab midpoint M ' Dao point a and point b line distance, and
As shown in figure 8, curve D described in design procedure 1.1 and curve G:
Curve D and curve G is the identical convex arc on 2 frontal outline plane P of cutter hub handle, 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,
The convex arc radius of curvature satisfaction of point h, point g, curve D and curve G:
lab/ 2 < ρ < 2lab
Wherein: IabIt is blade curve B outside stubble breaking knife in section [0,990k mm] scant length, i.e. point a and point b line 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 it is linearly increasing to breaking cutting edge terminating point b, the basil along the ever-increasing design in blade curve direction so that
With the progress of breaking operation, the incision width of stubble breaking knife is gradually increased along blade curve direction, is cut in favor of splitting to cut
Object, so improve breaking efficiency, and in breaking cutting edge any point basil αiMeet 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 length of curve of any point on blade curve at breaking edge starting point a, L is outside stubble breaking knife
Length of curve of Equation f (x) _ 1 of blade curve B in section [0,990k mm].
Claims (1)
1. a kind of design method of bionical stubble breaking knife, it is characterised in that include the following steps:
The geometry of 1.1 setting stubble breaking knifes: stubble breaking knife is made of cutter hub (1), knife handle (2) and the basil (5), in which:
Cutter hub (1) frontal outline is formed by connecting by ba curve, amn curve, np straight line, pr camber line and rb linear sequence, cutter hub (1)
Positive Middle face is longitudinally equipped with rm straight line；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；It is stubble breaking knife straight line E, rm that ba curve, which is that blade curve B, amn curve is stubble breaking knife curve D, np straight line outside stubble breaking knife,
The front intersecting lens of straight line, that is, plane M and curved surface N is stubble breaking knife straight line C；Cutter hub (1) negative profile by jk curve, khg curve,
Gf straight line, fi camber line and ij linear sequence are formed by connecting, longitudinal in the middle part of cutter hub (1) reverse side to be equipped with ih straight line；Jk curve is breaking
Knife inner cutter hole curve I, khg curve is that stubble breaking knife curve G, gf straight line is stubble breaking knife straight line F, ih straight line, that is, plane M and curved surface N
Reverse side intersecting lens, ih are stubble breaking knife straight line H；The frontal outline of knife handle (2) is by bb1Straight line, b1C straight line, cq camber line and qp1Straight line,
p1P straight line, pr camber line and rb straight line are formed by connecting, and the front of knife handle (2) is below with the positive top of cutter hub (1) by pr camber line and rb
Straight line connects, the b in knife handle (2) frontal outline1C straight line, cq camber line and qp1Straight line is in same plane P, knife handle (2) front wheel
Bb in exterior feature1Straight line, p1P straight line, pr camber line and rb straight line are in same curved surface K, in which: straight line p1b1It is plane P and curved surface K
Intersecting lens, b1C straight line and bb1Straight line is conllinear；The negative profile of knife handle (2) is by jj1Straight line, j1D straight line, de camber line, ef1Directly
Line, f1F straight line, fi camber line and ij straight line are formed by connecting, and the reverse side of knife handle (2) is below with cutter hub (1) reverse side top by fi camber line
It is connected with ij straight line, the j in knife handle (2) negative profile1D straight line, de camber line and ef1Straight line is in same plane P ', knife handle (2)
Jj in negative profile1Straight line, f1F straight line, fi camber line and ij straight line are in same curved surface K ', in which: straight line j1f1It is plane P '
With the intersecting lens of curved surface K '；An intersection point of the point b between curved surface K and plane M, and with straight line b1C is total to side；Knife handle 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 outer profile intersection point b of the front outer profile of knife handle (2) and cutter hub (1)
Point is origin O ', straight line b1B is X ' axis, and the plane P on knife handle (2) frontal outline is X ' O ' Z ' coordinate surface, establishes three-dimensional coordinate
It is O '-X ' Y ' Z ', the equation of plane M are as follows:
0≤x'≤990k, 0≤z'≤h4/cosβ
Wherein: k is equation zoom factor；h4For the length of rb straight line；β is the angle of plane M and X ' O ' Z ' coordinate surface；
Curved surface N described in 1.3 design procedures 1.1: the curved surface N equation in three-dimensional system of coordinate O '-X ' Y ' Z ' are as follows:
0≤x'≤990k,
Wherein: h4For the length of rb straight line；hP 'For midpoint p ' to the r point of rp camber line and the distance of p point line；R1For pr camber line
Radius R1；h4=1.33h5, h5For the distance of midpoint M ' to point a and point b line on blade curve ab；
Cutter hub (1) and knife handle (2) junction section are in coordinate system O ' Y ' Z ', projection width h of the b point to p point in Z ' axis6=
4.15h5；Midpoint p ' to the r point of rp camber line and the distance h of p point lineP'=0.2h6；
The radius R of pr camber line1Meet with the angle β of plane M and X ' O ' Z ' coordinate surface:
Wherein: h6For in coordinate system O ' Y ' Z ', projection width of the b point to p point in Z ' axis；
The prototype curve a of the outer blade curve B of stubble breaking knife described in 1.4 design procedures 1.10b0Equation are as follows:
F (x)=0.000535x2- 0.55x+7.037,0≤x≤990mm
Maximum needed for operation process cuts arc length LmaxAre as follows:
Wherein: R is stubble breaking knife outer diameter；h1For toothing and straw mulching layer thickness；h2For stubble breaking knife embedded depth；h3For root stubble depth
Degree；
Using b point as coordinate origin, plane where plane M is XOY, and straight line where straight line br is Y-axis, and the positive direction of X-axis is by original
Point b is directed toward the direction of stubble breaking knife starting breaking cutting edge a, by carrying out equal proportion scaling to blade curve prototype Equation f (x), obtains
The equation of blade curve B outside to stubble breaking knife are as follows:
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 length of curve of the curvilinear equation f (x) in section [0,990mm]；
Length of curve of Equation f (x) _ 1 in section [0,990k mm] that L is the outer blade curve B of stubble breaking knife；h5For on blade curve ab
Midpoint M ' to point a and point b line distance, and
Curve D described in 1.5 design procedures 1.1 and curve G:
Curve D and curve G is the identical convex arc on knife handle (2) frontal outline plane P, and point a on curve D, point m, point n and
Point g, point h, point k on 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,
The convex arc radius of curvature of point g, curve D and curve G meet:
lab/ 2 < ρ < 2lab
Wherein: IabIt is blade curve B outside stubble breaking knife in section [0,990k mm] scant length, i.e. point a and point b wire length；
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 line
Property increase, and in breaking cutting edge any point basil αiMeet following mathematic(al) representation:
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 length of curve of any point on blade curve at breaking edge starting point a, L is the outer cutting edge of stubble breaking knife
Length of curve of Equation f (x) _ 1 of curve B in section [0,990k mm].
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710298582.XA CN107124956B (en) | 2017-05-02 | 2017-05-02 | A kind of design method of bionical stubble breaking knife |
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| CN201710298582.XA CN107124956B (en) | 2017-05-02 | 2017-05-02 | A kind of design method of bionical stubble breaking knife |
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| CN107124956B true CN107124956B (en) | 2019-05-17 |
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| 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 |
| CN114638063B (en) * | 2022-03-22 | 2024-08-13 | 中国农业大学 | Stalk bionic shredding knife shape design and optimization method based on river dog incisors |
Citations (6)
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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 |
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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 |
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