CN1969599A - Bionic rotary-cutting and stubble-breaking blade - Google Patents

Abstract

The invention discloses a bionic rotary tillage stubble-grinding general-purpose blade, which is composed of lateral tangent plane part, positive tangent plane part and transition part between lateral and positive tangent plane parts, wherein the positive and lateral tangent plane parts aren't in the same plane; the positive tangent plane bends along bending line of knife shaft.

Description

Bionic rotary-cutting and stubble-breaking blade

Technical field

The invention belongs to the agricultural machinery category, relate in particular to a kind of rotary tillage blade.

Background technology

Rotary tillage and broken stubble (the particularly north) at home are two kinds of modal soil cultivations.The full width rotary tillage generally is used for the flat ground of doing more, and as paddy field, field of vegetables, wheatland etc., broken stubble generally is used for ridge culture ground in the north.External rotovator uses more, but does not have independent stubble cutter, is equipped with except that stubble parts in the seed-furrow opener front on some no-tillage seeding machine, removes the root stubble of crop row.The unit recoverable amount of domestic rotary tillage or the operation of broken stubble is all more than several ten thousand.In the last few years, some have occurred and can finish the type of rotary tillage and two kinds of operations of broken stubble on facility, and mainly contained two kinds of forms: (1) is changed different rotors and is satisfied rotary tillage or two kinds of different work of broken stubble; (2) double knife roller structure, broken stubble and rotary tillage operation simultaneously.Though two kinds of types have than much progress than unit, two rotors all to be arranged, two cover farming blade fixed part and two kinds of blades.If realize rotary tillage and two kinds of operations of broken stubble, use prior blade more tool changing rod and corresponding blade, so operation is not only bothersome, and efficiency of operation is also comparatively low.

Summary of the invention

The object of the present invention is to provide a kind of bionic rotary-cutting and stubble-breaking blade that can finish rotary tillage and two kinds of operations of broken stubble simultaneously.

By soil animals such as vole, pangolin, mole cricket being carried out in body, stripped dynamic desorption behavior test research, with telephotography stereomicroscope and high-speed motion picture camera different animals is excavated the observation of (soil-engaging component) enough, study its biological visbreaking and fall resistance mechanism, it is little that discovery has a resistance, be not stained with soil, the disturbed soil features of smaller is developed bionic rotary-cutting and stubble-breaking blade of the present invention in view of the above.

Bionic rotary-cutting and stubble-breaking blade of the present invention mainly by lateral tangent plane part with side cutting blade, have the transition of transitional edges positive tangent plane part facial and that have a positive cutting blade and form.Side cutting blade curve imitation animal touches the outside gabarit in native position, and its slip cutting angle α is changed from small to big to the cutter end by the cutter root, and the side tangent plane has the function of cutting Tu Fa, cutting off or pushing open grass blade, stubble.Positive cutting blade is a straight line then, finishes the chopping to the root stubble, also has functions such as digging, throw soil.

The blade curve that touches native curved surface of described side cutting blade, transitional edges and positive cutting blade satisfies following equation respectively:

Side cutting blade: y=0.0363x ²-10.049x+699.03 (1)

Transitional edges: $\{\begin{array}{c}70x+210y-123z-13460=0\\ {(y-190.5)}^2+{(z-40)}^2={40}^2\end{array}---\left(2\right)$

Positive cutting blade: $\frac{x-102}{-127}=\frac{y-243}{124}=\frac{z-70}{44}---\left(3\right)$

The Z axle is the tool roller axis center line in described coordinate system, and initial point O is the intersection point of blade side tangent plane and tool roller axis Z center line.

Bionic rotary-cutting and stubble-breaking blade of the present invention has solved the common question of rotary tillage and two kinds of elemental operations of broken stubble more up hill and dale, has the minimizing resistance, the characteristics that desorption performance is good, accomplish designs simplification (only with a cover rotor, blade fixture and tillage blade), (only need move gear lever conversion axle rotational speed when changing operation type) simple to operate, use (facility needn't carry out any dismounting combination) easy to adjust, thereby be convenient to applying of facility.In addition, the design of bionic rotary-cutting and stubble-breaking blade of the present invention has absorbed bionic achievement in research, and it is little to cut soil resistance, simple in structure, function admirable.

Description of drawings

Fig. 1 is the structural representation of bionic rotary-cutting and stubble-breaking blade of the present invention.

Embodiment

Fig. 1 shows the structure of bionic rotary-cutting and stubble-breaking blade of the present invention, in Fig. 1, origin of coordinates O is the intersection point of blade side tangent plane and tool roller axis center line Z, the structural representation of described interchangeable blade in XYZ coordinate system represented on the top of Fig. 1, wherein dotted portion is the projection of positive tangent plane part in XOY plane of this interchangeable blade, and the projection of this interchangeable blade in the YOZ plane represented in the lower part of Fig. 1.In the XYZ rectangular coordinate system, the Z axle is the tool roller axis center line, and lateral tangent plane part is in the XOY plane, and then not in XOY plane, it bends to the Z axle along folding line positive tangent plane part, shown in Fig. 1 the latter half.Transition face (QS curved surface place curved portion) is between lateral tangent plane part and positive tangent plane part.Two locating hole A of blade are all becoming on the ray at 20 ° of angles with X-axis with B and side cutting blade starting point P counterclockwise, the center in A hole and B hole and O point distance are respectively 55mm and 85mm, the length of OP is 135mm, and the length of OQ is 235mm, and wherein Q is the point of interface of side cutting blade and transitional edges.The blade curve that touches native curved surface of this bionic rotary-cutting and stubble-breaking blade satisfies equation:

Side cutting blade (PQ section): y=0.0363x ²-10.049x+699.03 (1)

Transitional edges (QS section): $\{\begin{array}{c}70x+210y-123z-13460=0\\ {(y-190.5)}^2+{(z-40)}^2={40}^2\end{array}---\left(2\right)$

Positive cutting blade (ST section) is: $\frac{x-102}{-127}=\frac{y-243}{124}=\frac{z-70}{44}---\left(3\right)$

Lead to and experimental results demonstrate the crooked process radius r between lateral tangent plane part and the positive tangent plane part ^*, bending angle φ and hilted broadsword fabric width b be bigger to operation quality and power consumption influence.R wherein ^*And φ is bigger to the operation quality influence, and b is bigger to the power consumption influence.A large amount of experiments show r ^*=40mm, φ=70 °, b=70mm can be the optimal parameter combination of interchangeable blade.The blade combination property has the break ground effect of soil moisture conservation of drag reduction, desorption, minimizing.Interchangeable blade is by 65Mn, and the steel plate that 8～10mm is thick is made, and for it is installed on the cutterhead, it is two in 14.5mm hole that there is diameter of phi in handle of a knife portion, with bolt blade and cutterhead is fixed, and blade is cut soil and cut root stubble position mill cutting edge.

Interchangeable blade of the present invention can be divided into a left side, two kinds of right tulwars, interchangeable blade is installed on the cutterhead of facility rotor that working width is 1400mm (2 row) by queueing discipline, facility are driven by Mount Taishan-30 tractor, rotary tillage and the operation of broken stubble are carried out in (dry farming) and the ridge culture of corn stubble on the ground in the paddy field respectively, axle rotational speed is respectively 218r/min and 409r/min, repeatedly the result of Ce Dinging is: rotary tillage degree of depth 13-14cm, tilling depth stability is 92% (＞85%), garrulous soil rate is 91% (＞60%), the broken stubble degree of depth is 10.5cm, stability coefficient is 89% (＞85%), broken stubble rate is 88% (＞86%), coverage rate is 87.8% (＞55%), all above the regulation of national standard the numerical value of national sector standard requirement (in the bracket for).

Claims (8)

1, a kind of bionic rotary-cutting and stubble-breaking blade, its mainly by lateral tangent plane part with side cutting blade, have the positive tangent plane part of positive cutting blade and between lateral tangent plane part and positive tangent plane part and facial composition of transition with transitional edges, it is characterized in that: the blade curve that touches native curved surface of described side cutting blade, transitional edges and positive cutting blade satisfies following equation respectively in XYZ coordinate is:

Side cutting blade (PQ section): y=0.0363x ²-10.049x+699.03 (1)

Transitional edges (QS section): $\left\{\begin{array}{c}70x+210y-123z-13460=0\\ {(y-190.5)}^2+{(z-40)}^2={40}^2\end{array}\right.---\left(2\right)$

Positive cutting blade (ST section) is: $\frac{x-102}{-127}=\frac{y-243}{124}=\frac{z-70}{44}---\left(3\right)$

The Z axle is the tool roller axis center line in described coordinate system, and initial point O is the intersection point of blade side tangent plane and tool roller axis Z center line.

2, interchangeable blade as claimed in claim 1 is characterized in that, described positive tangent plane part and lateral tangent plane part be not in same plane, and positive tangent plane part bends to the Z axle along folding line.

3, interchangeable blade as claimed in claim 2 is characterized in that, the crooked process radius r between lateral tangent plane part and the positive tangent plane part ^*Be 40mm, bending angle φ is 70 °, and hilted broadsword fabric width b is 70mm.

4, as the described interchangeable blade of one of claim 1-3, it is characterized in that, described blade have two locating holes (A, B).

5, interchangeable blade as claimed in claim 4 is characterized in that, described two locating holes and side cutting blade starting point (P) are all becoming on the ray at 20 ° of angles counterclockwise with X-axis.

6, interchangeable blade as claimed in claim 5 is characterized in that: described interchangeable blade is by 65Mn, and the steel plate that 8～10mm is thick is made.

7, as the described interchangeable blade of one of claim 1-3, it is characterized in that: described interchangeable blade is by 65Mn, and the steel plate that 8～10mm is thick is made.

8, interchangeable blade as claimed in claim 6 is characterized in that: the diameter of described locating hole is 145mm.

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