CN204131919U - A kind of variable curvature takes off native drag reduction disk harrow - Google Patents
A kind of variable curvature takes off native drag reduction disk harrow Download PDFInfo
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- CN204131919U CN204131919U CN201420537159.2U CN201420537159U CN204131919U CN 204131919 U CN204131919 U CN 204131919U CN 201420537159 U CN201420537159 U CN 201420537159U CN 204131919 U CN204131919 U CN 204131919U
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- disk harrow
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- cutting edge
- curved surface
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Abstract
A kind of variable curvature takes off native drag reduction disk harrow, comprise integrative-structure and the disk harrow body of equal thickness, the center of disk harrow body is the assembled portion for being connected with power set, the outer rim side face of disk harrow body is the cutting edge for breaking ground, cutting edge is evenly equipped with discrete circular arc cutting edge, the convex-concave two sides that disk harrow body is oppositely arranged is respectively outer tactile native curved surface and interior tactile native curved surface, in to touch native curved surface be to be moved 360 ° of curved surfaces obtained along the center continuous rotation of disk harrow body by lead curve, this lead curve meets equation
, wherein, the span of x is 0 ~ 18.The utility model is attached on disk harrow by touching native curved surface in variable curvature, reduces the contact probability on soil particle and disk harrow surface, and soil is reduced the resistance on disk harrow surface and adhesiveness.
Description
Technical field
The utility model relates to a kind of disk harrow for agriculture scarification equipment, and a kind of variable curvature takes off native drag reduction disk harrow specifically.
Background technology
Scarification equipment also claims surface tillage machinery, and kind is a lot, common are disk harrow, spike-tooth harrow, packer, power drive rake, paddy field harrow and paddy field driving harrow.Disk harrow is mainly used in the hack after ploughing pacifically, also can be used for stirring soil, weeding, mixed fertilizer, and the shallow plowing after results, stubble-cleaning, loosening the soil before sowing, the lid kind after aircraft broadcasts sowing applies maximum a kind of facility in surface tillage machinery.But the tactile native curved design of traditional disk harrow is sphere, namely touch native curved surface each point iso-curvature radius or iso-curvature.In the process of arable land, there is serious wear, working resistance be large and dig, take off the undesirable phenomenon of soil nature energy in this disk harrow.
For overcoming the above-mentioned defect of wearing and tearing, conventional method carries out Surface hardened layer, and at present, conventional Case hardening techniques has spraying, deposition, coating etc., but due to thin hardened layer thinner, reduce the validity that Prepared for Touching-soil Components of Terrain Machinery uses under abrasive wear operating mode; Further, the raising of engineering material case hardness is also limited.Excessive for overcoming working resistance, conventional art suitably increases blade radius of curvature, but the performance of digging causing disk harrow reduces; Or get the less blade basil, but add the rate of wear of rake sword, thus add maintenance cost; Or reducing rake group drift angle, blade should not bury, and soil-shifting, shovel grass, hack, performance of digging all weaken.In order to improve above-mentioned condition, people more concentrate on sight and improve material stiffness and increase disk harrow thickness, mate the more aspect such as big-power tractor, but the defect that the service life that resistance when these all fundamentally can not change disk harrow work adheres to greatly, high, serious wear causes is short.
Utility model content
Technical problem to be solved in the utility model overcomes existing disk harrow working resistance greatly, ploughs native inefficient problem, provide a kind of and improve the variable curvature disk harrow that disk harrow touches the geometric form of native curved surface because clay seriously causes.
The utility model for the adopted technical scheme that solves the problem is: a kind of variable curvature takes off native drag reduction disk harrow, comprise integrative-structure and the disk harrow body of equal thickness, the center of disk harrow body is the assembled portion for being connected with power set, the outer rim side face of disk harrow body is the cutting edge for breaking ground, cutting edge is evenly equipped with discrete circular arc cutting edge, the convex-concave two sides that disk harrow body is oppositely arranged is respectively outer tactile native curved surface and interior tactile native curved surface, in to touch native curved surface be to be moved 360 ° of curved surfaces obtained along the center continuous rotation of disk harrow body by lead curve, this lead curve meets equation
, wherein, the span of x is 0 ~ 18.
Described lead curve is in 0 ~ 18mm in x span, at the curved section that x and f (x) direction convergent-divergent same ratio obtains.
The center of described assembled portion is provided with square shaft hole, and assembled portion is evenly equipped with blade fixing hole along its side face.
In the utility model, be equal thickness by the cross section of disk harrow body diameter, as the thickness≤5mm of disk harrow body, the thickness≤0.8mm of cutting edge; As the thickness G reatT.GreaT.GT 5mm of disk harrow body, the thickness≤1mm of cutting edge.
Beneficial effect is: 1), the utility model improves the geometry that disk harrow touches native curved surface, the geometry touching native curved surface in variable curvature is attached on disk harrow, even if the lead curve of variable curvature along disk harrow center around 360 ° move continuously formed from the centre of gyration to wheel rim profile curve, this geometry can change soil in the motion state being in contact with it surface, guiding effect is produced to the soil of motion, soil particle is made to produce rolling effect, and reduce the soil particle quantity of boundary layer, reduce the contact probability on soil particle and disk harrow surface, preponderated by original slidingly contacting and change into based on Structure deformation, soil is reduced the resistance on disk harrow surface and adhesiveness, variable curvature disk harrow wearability of the present utility model is than the improve 40% of traditional spheric disk rake, drag reduction desorption performance improves 40%.
2), variable curvature disk harrow of the present utility model, be variable curvature along its section of diameter and interior tactile native surfaces intersection, by the former variable curvature curve of suitable adjustment
x, f (x) scaling, can when disk harrow diameter be constant, obtain optimum penetrating angle, common GB spheric disk rake compared to existing technology, can when not increasing disk harrow diameter, not changing plough group drift angle, keep good and bury, bulldoze, hack, the performance such as to dig.
Accompanying drawing explanation
Fig. 1 is curve map and the convergent-divergent example curve figure of lead curve in the utility model;
Fig. 2 is the structure chart of disk harrow in the utility model;
Fig. 3 is the front view of Fig. 2.
Reference numeral: 1, outer tactile native curved surface, 2, interior tactile native curved surface, 3, assembled portion, 301, square shaft hole, 302, blade fixing hole, 4, cutting edge, 5, circular arc cutting edge.
Embodiment
A kind of variable curvature drag reduction disk harrow, comprising the disk harrow body of integrative-structure, is equal thickness by the cross section of the diameter of disk harrow body.As shown in Figures 2 and 3, the center of disk harrow body is the assembled portion 3 for being connected with power set, the center of assembled portion 3 is provided with square shaft hole 301, and assembled portion 3 is evenly equipped with blade fixing hole 302 along its side face, the outer rim side face of disk harrow body is the cutting edge 4 for breaking ground, and cutting edge 4 is evenly equipped with discrete circular arc cutting edge 5.
Wherein, the convex-concave two sides that disk harrow body is oppositely arranged is respectively outer tactile native curved surface 1 and interior tactile native curved surface 2, and interior tactile native curved surface 2 to be moved 360 ° of curved surfaces obtained along the center continuous rotation of disk harrow body by lead curve, and this lead curve meets polynomial function equation
, wherein, the span of x is 0 ~ 18.
Described lead curve is in 0 ~ 18mm in x span, at the curved section that x and f (x) the direction identical or different ratio of convergent-divergent obtains.Through inspection, the degree of fitting of the functional equation of lead curve is:
.
As the thickness≤5mm of disk harrow body, the thickness≤0.8mm of cutting edge 4; As the thickness G reatT.GreaT.GT 5mm of disk harrow body, the thickness≤1mm of cutting edge 4.
X-f (x) two-dimensional coordinate system as shown in Figure 1, wherein, what real segment represented is the curve map of lead curve equation at 0≤x≤18mm; What phantom line segments represented is, this lead curve EQUATION x, f (x) direction are amplified 4.13 times, 13.89 times respectively and obtained, disk harrow body base diameter equals the interior tactile native curved surface alignment chart of 500mm, and interior tactile native curved surface to be moved 360 ° of curved surfaces obtained around x-axis continuous rotation by the center of this lead curve along disk harrow body.Base diameter and the working face axial length of drag reduction disk harrow all adopt the national standard size of relevant disk harrow, by controlling this variable curvature curve x, f (x) multiplication factor, each tilling depth can be adapted to by this disk harrow, by controlling this variable curvature curve variable x span, the cutting angle adapting to various soil can be obtained.Variable curvature disk harrow can make soil replace sliding motion to reduce to adhere to along interior tactile native curved surface with part rolling movement, reduces working resistance; Bury with suitable cutting angle, reduce penetrating distance.
Above-mentioned variable curvature curve is attached to disk harrow surface and makes entity, according to working condition, can adopt welding, the modes such as Surface Machining process, suitably increases assembled portion near zone thickness, can increase variable curvature disk harrow service life; Concrete size and the distribute spacing of above-mentioned variable curvature desorption drag reduction geometry entity should be determined according to concrete working environment and soil property; Meanwhile, should be taken into account the quality of processing technology and the height of use cost.Machining process route should according to material behavior, and existing processing method is specifically formulated.By controlling this variable curvature curve x, f (x) multiplication factor, all kinds of disk of the different-diameter that can design; By controlling this parametric equation variable x span, the different cutting angles adapting to various soil can be obtained.And this variable curvature structure can be applicable to the surface of multiple tactile earthenware tool such as such as hoe, weed shovel etc.
Claims (5)
1. a variable curvature takes off native drag reduction disk harrow, comprise integrative-structure and the disk harrow body of equal thickness, the center of disk harrow body is the assembled portion (3) for being connected with power set, the outer rim side face of disk harrow body is the cutting edge (4) for breaking ground, cutting edge (4) is evenly equipped with discrete circular arc cutting edge (5), it is characterized in that: the convex-concave two sides that disk harrow body is oppositely arranged is respectively outer tactile native curved surface (1) and interior tactile native curved surface (2), in to touch native curved surface (2) be to be moved 360 ° of curved surfaces obtained along the center continuous rotation of disk harrow body by lead curve, this lead curve meets equation
, wherein, the span of x is 0 ~ 18.
2. a kind of variable curvature according to claim 1 takes off native drag reduction disk harrow, it is characterized in that: described lead curve is in 0 ~ 18mm in x span, at the curved section that x and f (x) direction convergent-divergent same ratio obtains.
3. a kind of variable curvature according to claim 1 takes off native drag reduction disk harrow, it is characterized in that: the center of described assembled portion (3) is provided with square shaft hole (301), and assembled portion (3) is evenly equipped with blade fixing hole (302) along its side face.
4. a kind of variable curvature according to claim 1 takes off native drag reduction disk harrow, it is characterized in that: the thickness≤5mm of described disk harrow body, the thickness≤0.8mm of cutting edge (4).
5. a kind of variable curvature according to claim 1 takes off native drag reduction disk harrow, it is characterized in that: the thickness G reatT.GreaT.GT 5mm of described disk harrow body, the thickness≤1mm of cutting edge (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420537159.2U CN204131919U (en) | 2014-09-18 | 2014-09-18 | A kind of variable curvature takes off native drag reduction disk harrow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420537159.2U CN204131919U (en) | 2014-09-18 | 2014-09-18 | A kind of variable curvature takes off native drag reduction disk harrow |
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| Publication Number | Publication Date |
|---|---|
| CN204131919U true CN204131919U (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420537159.2U Expired - Fee Related CN204131919U (en) | 2014-09-18 | 2014-09-18 | A kind of variable curvature takes off native drag reduction disk harrow |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104255089A (en) * | 2014-09-18 | 2015-01-07 | 河南科技大学 | Variable-curvature soil-desorption/resistance-reduction disc harrow |
| CN105659949A (en) * | 2016-03-30 | 2016-06-15 | 柳州一合科技有限公司 | Novel folding disc harrow |
-
2014
- 2014-09-18 CN CN201420537159.2U patent/CN204131919U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104255089A (en) * | 2014-09-18 | 2015-01-07 | 河南科技大学 | Variable-curvature soil-desorption/resistance-reduction disc harrow |
| CN104255089B (en) * | 2014-09-18 | 2016-04-20 | 河南科技大学 | A kind of variable curvature takes off native drag reduction disk harrow |
| CN105659949A (en) * | 2016-03-30 | 2016-06-15 | 柳州一合科技有限公司 | Novel folding disc harrow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20150918 |
|
| EXPY | Termination of patent right or utility model |