Seedling belt minimal tillage straw cleaning device

Abstract

A seedling zone minimal tillage straw cleaning device is mounted in front of a seeding single body during working and is characterized by comprising a rotary cutter shaft, a left-handed straw cleaning spiral blade, a left-handed spiral soil crushing cutter, a stubble cutting disc, a right-handed spiral soil crushing cutter and a right-handed straw cleaning spiral blade, the stubble cutting disc is mounted on the rotary cutter shaft, and the left-handed spiral soil crushing cutter and the right-handed spiral soil crushing cutter are mounted on the rotary cutter shaft. A plurality of left-hand spiral soil breaking cutters and a plurality of right-hand spiral soil breaking cutters are symmetrically installed on the circumference of the rotary cutter shaft on the two sides of the stubble cutting disc, the left-hand spiral soil breaking cutters and the left-hand straw cleaning spiral blades are connected into an integrated spiral structure, and the right-hand spiral soil breaking cutters and the right-hand straw cleaning spiral blades are connected into an integrated spiral structure. And the rear output power of the tractor is connected with and drives the rotary cutter shaft to operate through the gearbox. Corn stubbles are cut through the stubble cutting disc, straw of a seedling belt is cut off through the left-handed spiral soil breaking cutter and the right-handed spiral soil breaking cutter, the straw is transversely conveyed to the two sides, and the straw is pushed to at least the two sides of the seedling cultivating belt under the combined action of the left-handed straw cleaning spiral blade and the right-handed straw cleaning spiral blade.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a seedling belt less-tillage and straw clearing device. Background Art

[0002] Conservation tillage covers the ground with crop straw by carrying out less or no tillage on farmland, thus reducing soil erosion and improving soil fertility. In the mode of returning all the straw to the field, there is a large amount of straw on the ground, which will cause the sowing machine to be blocked. The working principle of the seedling belt straw cleaning device is to clean the straw of the seedling belt to the space between two adjacent seedling belts on the straw-covered surface, so as to carry out sowing operations in the clean seedling belt. There are two main types of seedling belt straw cleaning devices: passive and active. The active straw cleaning device is driven by mechanical or hydraulic means, with high speed and good cleaning effect, but it moves a large amount of soil. The passive straw cleaning device rotates by friction with the soil and straw, which is prone to slippage and has limited ability to clean straw. Therefore, it is necessary to study a new type of straw cleaning device to solve the technical problems existing in the prior art. Summary of the invention

[0003] In view of the above-mentioned technical problems, the present invention provides a seedling belt less tillage and straw clearing device, which cuts the straw in the seedling belt through left-handed and right-handed spiral soil-breaking cutters and transports the straw horizontally to both sides. Under the joint action of left-handed and right-handed straw-clearing spiral blades, the straw is pushed to at least both sides of the seedling belt.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] The present invention discloses a seedling belt reduced-tillage and straw-clearing device, which is installed in front of the working front of a sowing unit and comprises a rotating knife shaft, a left-handed straw-clearing spiral blade, a left-handed spiral soil-breaking cutter, a stubble cutting disc, a right-handed spiral soil-breaking cutter and a right-handed straw-clearing spiral blade. The stubble cutting disc is installed on the rotating knife shaft, and a plurality of left-handed spiral soil-breaking cutters and right-handed spiral soil-breaking cutters are symmetrically installed on the circumference of the rotating knife shaft on both sides of the stubble cutting disc, and the left-handed spiral soil-breaking cutter is connected with the left-handed straw-clearing spiral blade as an integrated spiral structure, and the right-handed spiral soil-breaking cutter is connected with the right-handed straw-clearing spiral blade as an integrated spiral structure. When working, the rear output power of the tractor is connected through the gearbox and drives the rotating knife shaft to operate.

[0006] Furthermore, a plurality of the left-handed / right-handed spiral soil crushing cutters are evenly installed along the outer circumference of the rotating blade shaft, and each of the left-handed / right-handed spiral soil crushing cutters is a plurality of left-handed / right-handed cutters evenly spaced on the outer circumference of the left-handed / right-handed spiral blade.

[0007] Furthermore, the cutting edge curves of the left-handed cutter and the right-handed cutter are both eccentric arc curves.

[0008] Furthermore, the left-handed cutters of two adjacent left-handed spiral blades are staggered, and the right-handed cutters of two adjacent right-handed spiral blades are staggered.

[0009] Furthermore, the left-handed straw-cleaning spiral blades and the right-handed straw-cleaning spiral blades are both variable-diameter spiral blades that only transport straw axially without moving the soil.

[0010] Furthermore, the cutting disc cutting edge curve adopts an Archimedean spiral.

[0011] The beneficial effects of the present invention are:

[0012] 1. The present invention is installed right in front of the no-till sowing unit. The rear output power of the tractor drives the rotating knife shaft through the gearbox, thereby driving the seedling belt less-tillage and straw clearing device to rotate at high speed. The stubble cutting disc cuts the corn stubble, the left-handed spiral soil breaking cutter and the right-handed spiral soil breaking cutter cut the straw of the seedling belt, and transport the straw horizontally to both sides. Under the joint action of the left-handed straw clearing spiral blade and the right-handed straw clearing spiral blade, the straw is pushed to at least both sides of the tillage seedling belt.

[0013] 2. The staggered distribution of the cutters in the present invention is conducive to the separation of the straw and soil in the seedling belt, and reduces the lateral displacement of the soil in the seedling belt. The left-handed spiral soil-breaking cutter and the right-handed spiral soil-breaking cutter are used to shallowly rotate the soil in the seedling belt and clean the straw, forming a loose seedling belt without straw cover, which is conducive to increasing ground temperature, improving sowing quality, and promoting early growth of corn. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of the present invention.

[0015] Figure 2 It is a left view of the present invention.

[0016] Figure 3 This is a schematic diagram of the positions of the device, soil and straw when the present invention is working.

[0017] Figure 4 Schematic diagram of a left-handed spiral soil crushing cutter.

[0018] Figure 5 Schematic diagram of a right-hand spiral soil crushing cutter.

[0019] In the figure: 1. rotating knife shaft, 2. left-handed spiral blade for cleaning straw, 3. left-handed spiral soil-breaking cutter, 31 left-handed spiral blade, 32 left-handed cutter, 4. stubble cutting disc, 5. right-handed spiral soil-breaking cutter, 51 right-handed spiral blade, 52 right-handed cutter, 6. right-handed spiral blade for cleaning straw, 7. straw layer, 8. soil layer, 9. seedling belt. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0021] Embodiment: The present invention provides a seedling belt less tillage straw cleaning device, which is installed in front of the sowing unit, and includes a rotating blade shaft 1, a left-handed straw cleaning spiral blade 2, a left-handed spiral soil breaking cutter 3, a stubble cutting disc 4, a right-handed spiral soil breaking cutter 5 and a right-handed straw cleaning spiral blade 6. The stubble cutting disc 4 is installed on the rotating blade shaft 1, and a plurality of left-handed spiral soil breaking cutters 3 and right-handed spiral soil breaking cutters 5 are respectively installed on the circumference of the rotating blade shaft 1 on both sides of the stubble cutting disc 4, and the left-handed spiral soil breaking cutter 3 and the left-handed straw cleaning spiral blade 6 are connected to each other. The blades 2 are connected as an integrated spiral structure, and the right-handed spiral soil crushing cutter 5 is connected as an integrated spiral structure with the right-handed straw cleaning spiral blade 2. When working, the rear output power of the tractor is connected through the gearbox and drives the rotating knife shaft 1 to operate, the stubble cutting disc 4 cuts the corn stubble, the left-handed spiral soil crushing cutter 3 and the right-handed spiral soil crushing cutter 5 cut the straw of the seedling belt and transport the straw horizontally to both sides, and under the joint action of the left-handed straw cleaning spiral blade 2 and the right-handed straw cleaning spiral blade 6, the straw is pushed to at least both sides of the tilled seedling belt 9.

[0022] like Figure 4 As shown, a plurality of the left-handed spiral soil-crushing cutters 3 are evenly installed along the outer circumference of the rotating cutter shaft 1, and each of the left-handed spiral soil-crushing cutters 3 is evenly spaced and arranged with a plurality of groups of left-handed cutters 32 on the outer circumference of the left-handed spiral blade 31. In this example, the number of the left-handed spiral blades 31 on the left-handed spiral soil-crushing cutter 3 is 4, and the number of the left-handed cutters 32 is 10. The 4 groups of left-handed spiral blades 31 are evenly distributed with 3, 2, 3, and 2 left-handed cutters 33, respectively.

[0023] The number of the left-handed straw cleaning spiral blades 2 is 4, which are evenly distributed along the outer circumference of the rotating blade shaft 1, and can produce an axial pushing effect on the straw, which is beneficial to the axial movement of the straw. The variable-diameter spiral blades are used to only axially transport the straw without moving the soil, thereby reducing the amount of moving soil.

[0024] like Figure 5 As shown, a plurality of right-handed spiral soil-crushing cutters 5 are evenly installed along the outer circumference of the rotating cutter shaft 1, and each right-handed spiral soil-crushing cutter 5 is provided with a plurality of right-handed cutters 52 evenly spaced around the outer circumference of the right-handed spiral blade 51. In this example, the number of right-handed spiral blades 51 on the right-handed spiral soil-crushing cutter 5 is 4, and the number of right-handed cutters 52 is 10. The 4 groups of right-handed spiral blades 51 are evenly distributed with 3, 2, 3, and 2 right-handed cutters 52, respectively.

[0025] There are four right-handed straw-cleaning spiral blades 6, which are evenly distributed along the outer circumference of the rotating knife shaft 1, and can produce an axial pushing effect on the straw, which is beneficial to the axial movement of the straw. The variable-diameter spiral blades are used to only transport the straw axially without moving the soil, thereby reducing the amount of moving soil.

[0026] The left-handed cutters 32 of two adjacent left-handed spiral blades 31 are staggered, and the right-handed cutters 52 of two adjacent right-handed spiral blades 51 are staggered, which reduces the number of cutters and facilitates the separation of seedling strip straw and soil.

[0027] The cutting edge curves of the left-handed cutter 32 and the right-handed cutter 52 are both eccentric arc curves (existing technology), which have a sliding cutting effect on straw and soil and reduce operating resistance.

[0028] The cutting edge curve of the stubble cutting disc 4 adopts an Archimedean spiral (existing technology), which has a sliding cutting effect on stubble, straw and soil, thereby reducing operating resistance.

[0029] The components not described in detail in this application are all existing conventional technologies and will not be described in detail here.

[0030] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A seedling belt less tillage and straw clearing device, installed in front of the sowing unit, characterized by: It comprises a rotating knife shaft, a left-handed straw-clearing spiral blade, a left-handed spiral soil-breaking cutter, a stubble cutting disc, a right-handed spiral soil-breaking cutter and a right-handed straw-clearing spiral blade. The stubble cutting disc is mounted on the rotating knife shaft. A plurality of left-handed spiral soil-breaking cutters and right-handed spiral soil-breaking cutters are symmetrically mounted on the circumference of the rotating knife shaft on both sides of the stubble cutting disc. The left-handed spiral soil-breaking cutter is connected with the left-handed straw-clearing spiral blade as an integrated spiral structure, while the right-handed spiral soil-breaking cutter is connected with the right-handed straw-clearing spiral blade as an integrated spiral structure. When working, the rear output power of the tractor is connected through the gearbox and drives the rotating knife shaft to operate.

2. The seedling belt less tillage and straw clearing device according to claim 1, characterized in that: A plurality of left-handed / right-handed spiral soil-crushing cutters are evenly installed along the outer circumference of the rotating cutter shaft, and each of the left-handed / right-handed spiral soil-crushing cutters is a plurality of left-handed / right-handed cutters evenly spaced on the outer circumference of the left-handed / right-handed spiral blade.

3. The seedling belt less tillage and straw clearing device according to claim 2, characterized in that: The cutting edge curves of the left-handed cutting knife and the right-handed cutting knife are both eccentric arc curves.

4. The seedling belt less tillage and straw clearing device according to claim 2, characterized in that: The left-handed cutters of two adjacent left-handed spiral blades are staggered, and the right-handed cutters of two adjacent right-handed spiral blades are staggered.

5. The seedling belt less tillage and straw clearing device according to claim 1 or 2, characterized in that: The left-handed straw-cleaning spiral blade and the right-handed straw-cleaning spiral blade are both variable-diameter spiral blades, which only transport the straw axially without moving the soil.

6. The seedling belt less tillage and straw clearing device according to claim 1, characterized in that: The cutting disc cutting edge curve adopts the Archimedean spiral.

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