A stubble burying device for a rotary tillage and straw returning machine and the rotary tillage and straw returning machine

Abstract

The present invention relates to a stubble burying device for a rotary tillage and straw returning machine and a rotary tillage and straw returning machine, which includes a stubble burying cutter roller shaft and several stubble burying cutter wheels. The two ends of the stubble burying cutter roller shaft are pivotally connected to the frame of the rotary tillage and straw returning machine, and several stubble burying cutter wheels are equidistantly arranged on the stubble burying cutter roller shaft. Each stubble burying cutter wheel includes several stubble burying cutters, and the stubble burying cutters are rotationally symmetrically arranged to form a cutter wheel; several stubble burying notches are provided on the arc-shaped outer edge of each stubble burying cutter. The stubble burying notches on the stubble burying cutter wheel can increase the contact area between the stubble burying cutter and the straw, and the straw will be rotated and pressed into the soil as the stubble burying cutter roller shaft rotates. The present invention also relates to a rotary tillage and straw returning machine with a stubble burying device, which includes a frame, a rotary tillage cutter roller shaft, rotary tillage cutter wheels, a stubble burying cutter roller shaft and stubble burying cutter wheels. The rotary tillage cutter roller shaft and the stubble burying cutter roller shaft are sequentially pivotally connected to the frame. The main feature is that it is improved into a multi-functional land preparation machine for both paddy fields and dry fields, with double shafts for front rotary tillage, rear stubble burying and straw pressing, which reduces the operation time and greatly improves the operation efficiency.

Description

Technical Field

[0001] The invention relates to agricultural machinery, in particular to a stubble burying device used on a rotary tillage machine and a rotary tillage machine with the stubble burying device. Background Art

[0002] After the corresponding crops are harvested in corn, rice and wheat planting areas, the fields will be left with straw and rice or wheat stubble. In order to ensure subsequent planting, the straw, rice stubble and wheat stubble in the fields need to be processed accordingly. The existing rotary tillers are single-axis machines with a single rotary tillage function. The straw on the land after rotary tillage is fine and scattered, and the straw can no longer be effectively buried and returned to the field. In addition, the sizes of straw and grass stalks of different crops after rotary tillage or cutting are quite different. At present, there is no effective stubble burying device or rotary tillage burying machine suitable for multiple crops in multiple terrains, which greatly increases the difficulty of burying the stubble and returning the field. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a stubble burying device for a rotary tillage machine and a rotary tillage machine with the stubble burying device.

[0004] The present invention provides a stubble burying device for a rotary tillage machine, comprising a stubble burying knife roller shaft and a plurality of stubble burying knife wheels. Both ends of the stubble burying knife roller shaft are pivotally connected to a frame of the rotary tillage machine. A plurality of stubble burying knife wheels are equidistantly arranged on the stubble burying knife roller shaft. The stubble burying knife wheels are coaxial with the stubble burying knife roller shaft.

[0005] Each stubble burying blade wheel includes several stubble burying blades, which are arranged rotationally symmetrically to form a blade wheel; a plurality of stubble burying notches are provided on the upper part of the arc-shaped outer edge of each stubble burying blade. The stubble burying notches are unequal-sided angle notches, the notch angle is greater than or equal to 90°, the long side is at the upper part of the arc-shaped outer edge of the stubble burying blade, and the short side is at the lower part of the arc-shaped outer edge of the stubble burying blade.

[0006] The stubble burying knife wheels are arranged in a staggered manner on the stubble burying knife roller shaft.

[0007] The stubble burying device also includes a grass retaining grille, which is composed of a number of vertical elastic teeth arranged in an equidistant array. The grass retaining grille is fixed on the machine frame and is located in front of the stubble burying knife roller shaft. The grass retaining grille is inclined toward the stubble burying knife roller shaft; each stubble burying knife wheel extends into each grille gap of the grass retaining grille.

[0008] The present invention provides a rotary tillage machine with a stubble burying device, comprising a frame, a rotary tillage blade roller shaft, a rotary tillage blade wheel, a stubble burying blade roller shaft and a stubble burying blade wheel, wherein the rotary tillage blade roller shaft and the stubble burying blade roller shaft are pivotally connected to the frame in sequence, with the rotary tillage blade roller shaft in front and the stubble burying blade roller shaft in the back; a plurality of rotary tillage blade wheels are equidistantly arranged on the rotary tillage blade roller shaft, and a plurality of stubble burying blade wheels are equidistantly arranged on the stubble burying blade roller shaft; the stubble burying blade wheel comprises a plurality of stubble burying blades, which are rotationally symmetrically arranged to form a blade wheel; a plurality of stubble burying notches are arranged on the upper part of the arc-shaped outer edge of each stubble burying blade. The stubble burying notches are unequal-sided angular notches, with an angle of notch greater than or equal to 90°, a long side at the upper part of the arc-shaped outer edge of the stubble burying blade, and a short side at the lower part of the arc-shaped outer edge of the stubble burying blade.

[0009] The rotary tillage machine also includes a grass retaining grille, which is composed of a number of vertical elastic teeth arranged in an equidistant array. The grass retaining grille is fixed on the frame and is located in front of the stubble burying knife roller shaft. The grass retaining grille is inclined toward the stubble burying knife roller shaft; each stubble burying knife wheel extends into each grille gap of the grass retaining grille.

[0010] The rotary tillage machine also includes a transmission box, an input bevel gear shaft and two transmission half shafts. The transmission box is arranged at the front end of the frame, the input bevel gear shaft is pivoted to the transmission box, and the two transmission half shafts are respectively pivoted on both sides of the transmission box. The bevel gear of the input bevel gear shaft is meshed with the bevel gear of the transmission half shaft in the transmission box; one side of the transmission half shaft is connected to the rotary tillage roller shaft through a transmission assembly, and the other side of the transmission half shaft is connected to the stubble burying roller shaft through a transmission assembly.

[0011] The outer end of the transmission half shaft on one side is provided with a gear, which is connected to the gear of the rotary tiller roller shaft through a gear transmission assembly; the outer end of the transmission half shaft on the other side is provided with a sprocket, which is connected to the sprocket of the stubble roller shaft through a chain transmission assembly.

[0012] The rear part of the frame is connected with a grass pressing plate through an elastic plate, and a number of arc-shaped grass pressing teeth are arranged in an equidistant array at the lower part of the grass pressing plate; a connecting rod is pivotally connected to the grass pressing plate, a supporting rod is sleeved on the connecting rod, and the other end of the supporting rod is fixed on the frame; a reset spring is also sleeved on the connecting rod, one end of the reset spring is fixed on the connecting rod, and the other end is connected to the supporting rod.

[0013] Working principle of the present invention:

[0014] The stubble burying device for a rotary tillage machine provided by the present invention can be installed on the frame of the rotary tillage machine and used in conjunction with the rotary tillage machine. The stubble burying device is installed at the rear of the rotary tillage machine. As the rotary tillage machine moves forward, power is provided by the power input system of the rotary tillage machine to drive the stubble burying knife roller shaft to rotate forward, and the stubble burying knife wheel on the stubble burying knife roller shaft rotates accordingly, and the grass stalks are pressed into the soil by means of the stubble burying recesses on the arc-shaped outer edge of each stubble burying knife on the stubble burying knife wheel, so that the straw or grass stalks after rotary tillage are effectively buried and returned to the field; the grass retaining grille blocks the grass stalks or soil blocks lifted up by the rotary tillage machine to prevent them from being entangled in or blocked by the stubble burying knife wheel, and at the same time, the stubble burying knife wheel presses the grass stalks blocked by the grass retaining grille into the soil.

[0015] The present invention provides a rotary tillage machine with a stubble burying device, which is equipped with the above-mentioned stubble burying device. The stubble burying device is installed at the rear of the rotary tillage machine, and the rotary tillage machine is suspended and connected to the rear of a tractor. The input bevel gear shaft is connected to the tractor power output shaft through a universal joint. The power of the tractor is transmitted to the input bevel gear shaft of the machine's transmission box through the power output shaft, and is reduced in one stage and changed in direction through a pair of bevel gears. The power is transmitted to the gears and sprockets by the rotation of two transmission half shafts. The gears of the transmission half shaft on one side transmit the power to the rotary tillage knife roller shaft through the gear transmission assembly, driving the rotary tillage knife roller shaft to rotate, and the sprockets of the transmission half shaft on the other side transmit the power to the stubble burying knife roller shaft through the chain transmission assembly, driving the stubble burying knife roller shaft to rotate. The rotary tillage blade roller shaft rotates to drive the rotary tillage blade wheel to till the planting soil, and the stubble burying device operates synchronously, and the stubble burying blade wheel is driven by the stubble burying blade roller shaft to rotate, and the grass straw is pressed into the soil through the stubble burying notch on the arc-shaped outer edge of the stubble burying blade. The grass retaining grille cooperates with the stubble burying blade wheel, and the stubble burying blade wheel presses the grass straw or soil blocks blocked on the grass retaining grille into the soil, thereby realizing the effective stubble burying and returning of the straw or grass stalks after rotary tillage. The grass pressing plate connected by an elastic plate at the rear of the stubble burying device can further realize the function of pressing grass and leveling the land. The elastic plate connecting the grass pressing plate and the reset spring connecting rod connected to the upper part thereof provide a certain elastic force and pressure for the grass pressing plate, and the grass straw is further pressed into the soil and compacted through the arc-shaped grass pressing teeth equidistantly arrayed at the lower part of the grass pressing plate.

[0016] Beneficial effects of the present invention:

[0017] The present invention provides a stubble burying device for a rotary tillage machine. The stubble burying notch on the stubble burying wheel can increase the contact area between the stubble burying knife and the grass straw. The outer edge of the stubble burying knife is set in an arc shape. As the stubble burying knife roller rotates, the grass straw is pressed into the soil to achieve a good stubble burying effect. The grass straw or soil blocks raised by the rotary tiller are prevented from winding around the stubble burying wheel or blocking the stubble burying wheel. The grass burying grille blocks the grass straw outside the stubble burying wheel, which helps the stubble burying wheel to press the grass straw into the soil, thereby improving the stubble burying rate and stubble burying operation efficiency. The radius of the stubble burying wheel, that is, the length of the stubble burying knife, can be designed according to soil conditions and relevant requirements, and the stubble burying depth can be finally achieved in the range of 0-40 cm. The width between the stubble burying wheels and the width of the grass burying grille can be designed according to relevant indicators such as the length and hardness of the grass straw, so that they are matched with each other, the stubble burying rate and operation efficiency can be improved, and the stubble burying effect can reach more than 98%.

[0018] The present invention provides a rotary tillage machine with a stubble burying device, which is mainly characterized by being improved from the single-axis single rotary tillage function in the past to a multifunctional land preparation machine with a double-axis front rotary tillage, rear stubble burying and grass pressing for both water and dry fields, and truly being able to complete rotary tillage and soil crushing, rhizome crushing, pulping, stubble burying, and land leveling operations in one operation. The machine can perform rotary tillage, crushing, raking, stubble burying and other dragging operations after wheat harvest and before rice planting, and can also perform rotary tillage, crushing, burying stubble and directly plant wheat after rice harvest, thereby reducing the operation time, eliminating the need for multiple operations, and preventing the machine from damaging the land by multiple operations, greatly improving the operation efficiency. After the rhizome is returned to the field, organic fertilizer can be formed after a certain period of time, reducing the amount of chemical fertilizer used, greatly reducing the planting cost of farmers, and also avoiding excessive use of chemical fertilizers to cause soil hardening, alkalization or acidification, greatly improving the economic benefits and social benefits of planting. The front rotary tillage adopts gear transmission, and the rear stubble burying adopts chain transmission. The speed of the front and rear axles is controlled by the ratio of the number of large and small gears and the number of sprocket teeth, so that the speed configuration of the front and rear axles is reasonable, thus achieving ideal working effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic structural diagram of a stubble burying device used on a rotary tillage machine.

[0020] Figure 2 The present invention is a schematic diagram of the structure of a stubble burying wheel of a stubble burying device used on a rotary tillage machine.

[0021] Figure 3 The figure is a schematic diagram of the grass retaining grille structure of the stubble burying device of the present invention.

[0022] Figure 4 The structure of a rotary tillage machine with a stubble burying device according to the present invention is shown in FIG. Figure 1 .

[0023] Figure 5The structure of a rotary tillage machine with a stubble burying device according to the present invention is shown in FIG. Figure 2 .

[0024] Figure 6 The present invention is a schematic diagram of the cross-sectional structure of a rotary tillage machine with a stubble burying device.

[0025] 1. Stubble burying knife roller shaft, 2. Stubble burying knife wheel, 3. Frame, 4. Stubble burying knife, 5. Stubble burying notch, 6. Grass retaining grille, 7. Rotary tillage knife roller shaft, 8. Rotary tillage knife wheel, 9. Transmission box, 10. Input bevel gear shaft, 11. Transmission half shaft, 12. Gear transmission assembly, 13. Chain transmission assembly, 14. Elastic plate, 15. Grass pressing plate, 16. Grass pressing teeth, 17. Connecting rod, 18. Support rod, 19. Return spring. DETAILED DESCRIPTION

[0026] In conjunction with the instruction manual Figure 1-3 As shown:

[0027] The present invention provides a stubble burying device for a rotary tillage machine, comprising a stubble burying cutter roller shaft 1 and a plurality of stubble burying cutter wheels 2. The two ends of the stubble burying cutter roller shaft 1 are pivotally connected to a frame 3 of the rotary tillage machine. The stubble burying cutter roller shaft 1 is equidistantly provided with a plurality of stubble burying cutter wheels 2. The stubble burying cutter wheels 2 are coaxial with the stubble burying cutter roller shaft 1.

[0028] Each stubble burying blade wheel 2 includes three stubble burying blades 4, which are arranged rotationally symmetrically to form a blade wheel; three stubble burying notches 5 are provided on the upper part of the arc-shaped outer edge of each stubble burying blade 4. The stubble burying notches 5 are unequal angle notches, with an angle greater than 90°, a long side at the upper part of the arc-shaped outer edge of the stubble burying blade 4, and a short side at the lower part of the arc-shaped outer edge of the stubble burying blade 4. The angle of the stubble burying notches 5 and the setting of the long and short sides help the stubble burying blade 4 to bury the grass straw in the soil when it rotates downward, and when the stubble burying blade rotates out of the soil, the long side of the stubble burying notches 5 will not bring out the straw that has been buried in the soil.

[0029] The stubble burying blade wheels 2 are arranged in a staggered manner on the stubble burying blade roller shaft 1 to prevent grass straw from being left out and not being buried.

[0030] The stubble burying device also includes a grass retaining grille 6, which is composed of a number of vertical elastic teeth arranged in an equidistant array. The grass retaining grille 6 is fixed on the machine frame 3 and is located in front of the stubble burying knife roller shaft 1. The grass retaining grille 6 is inclined toward the stubble burying knife roller shaft 1, so that the grass straw can slide downward. Each stubble burying knife wheel 2 extends into each grille gap of the grass retaining grille 6, which is convenient for the stubble burying knife wheel 2 to bury the stubble.

[0031] In conjunction with the instruction manual Figure 1-6 As shown:

[0032] The present invention provides a rotary tillage machine with a stubble burying device, comprising a frame 3, a rotary tillage roller shaft 7, a rotary tillage wheel 8, a stubble burying roller shaft 1 and a stubble burying wheel 2, wherein the rotary tillage roller shaft 7 and the stubble burying roller shaft 1 are pivotally connected to the frame 3 in sequence, with the rotary tillage roller shaft 7 in front and the stubble burying roller shaft 1 in the back, and the stubble burying roller shaft 1 rotates forward clockwise; a plurality of rotary tillage wheels 8 are equidistantly arranged on the rotary tillage roller shaft 7, and a plurality of stubble burying wheels 2 are equidistantly arranged on the stubble burying roller shaft 1.

[0033] Each stubble burying blade wheel 2 includes three stubble burying blades 4, which are rotationally symmetrically arranged to form a blade wheel; three stubble burying notches 5 are provided on the upper part of the arc-shaped outer edge of each stubble burying blade 4. The stubble burying notches 5 are unequal-sided angular notches, with an angle of notch greater than 90°, a long side at the upper part of the arc-shaped outer edge of the stubble burying blade 4, and a short side at the lower part of the arc-shaped outer edge of the stubble burying blade 4.

[0034] The rotary tillage machine also includes a grass retaining grille 6, which is composed of a number of vertical elastic teeth arranged in an equidistant array. The grass retaining grille 6 is fixed on the frame 3 and is located in front of the stubble burying knife roller shaft 1. The grass retaining grille 6 is inclined toward the stubble burying knife roller shaft 1, so that the grass straw can slide downward. Each stubble burying knife wheel 2 extends into each grille gap of the grass retaining grille 6, which is convenient for the stubble burying knife wheel 2 to bury the stubble.

[0035] The rotary tillage machine also includes a transmission box 9, an input bevel gear shaft 10 and two transmission half shafts 11. The transmission box 9 is arranged at the front end of the frame 3, the input bevel gear shaft 10 is pivoted on the transmission box 9, and the two transmission half shafts 11 are respectively pivoted on both sides of the transmission box 9. The bevel gear of the input bevel gear shaft 10 is meshed with the bevel gear of the transmission half shaft 11 in the transmission box 9; one side of the transmission half shaft 11 is connected to the rotary tillage roller shaft 7 through a transmission assembly, and the other side of the transmission half shaft 11 is connected to the stubble burying roller shaft 1 through a transmission assembly.

[0036] The outer end of the transmission half shaft 11 on one side is provided with a gear, which is connected to the gear of the rotary tiller roller shaft 7 through a gear transmission assembly 12; the outer end of the transmission half shaft 11 on the other side is provided with a sprocket, which is connected to the sprocket of the stubble roller shaft 1 through a chain transmission assembly 13.

[0037] A grass pressing plate 15 is connected to the rear of the frame 3 through an elastic plate 14, and a plurality of arc-shaped grass pressing teeth 16 are arranged in an equidistant array at the lower part of the grass pressing plate 15; a connecting rod 17 is pivotally connected to the upper part of the grass pressing plate 15, and a support rod 18 is sleeved on the upper end of the connecting rod 17, and the other end of the support rod 18 is fixed to the frame 3; a return spring 19 is also sleeved on the connecting rod 17, and one end of the return spring 19 is fixed to the connecting rod 17, and the other end is connected to the support rod 18.

[0038] Working principle of the present invention:

[0039] The stubble burying device for a rotary tillage machine provided by the present invention can be installed on a frame 3 of the rotary tillage machine for use with the rotary tillage machine. The stubble burying device is installed at the rear of the rotary tillage machine. As the rotary tillage machine moves forward, the power input system of the rotary tillage machine provides power to drive the stubble burying knife roller shaft 1 to rotate forward clockwise, and the stubble burying knife wheel 2 on the stubble burying knife roller shaft 1 rotates accordingly. The grass stalks are pressed into the soil with the help of the stubble burying recesses 5 on the arc-shaped outer edge of each stubble burying knife 4 on the stubble burying knife wheel 2, so that the straw or grass stalks after rotary tillage are effectively buried and returned to the field; the grass blocking grille 6 blocks the grass stalks or soil blocks rolled up by the rotary tillage machine to prevent them from being entangled with the stubble burying knife wheel 2 or blocked by the stubble burying knife wheel 2. At the same time, the stubble burying knife wheel 2 presses the grass stalks blocked by the grass blocking grille 6 into the soil.

[0040] A rotary tillage machine with a stubble burying device provided by the present invention is equipped with the above-mentioned stubble burying device, which is installed at the rear of the rotary tillage machine, and the rotary tillage machine is suspended and connected to the rear of a tractor. The input bevel gear shaft 10 is connected to the tractor power output shaft through a universal joint. The power of the tractor is transmitted to the input bevel gear shaft 10 of the machine transmission box 9 through the power output shaft, and is reduced and changed in direction through a pair of bevel gears. The power is transmitted to the gears and sprockets by the rotation of two transmission half shafts 11. The gears of the transmission half shaft 11 on one side transmit the power to the rotary tillage roller shaft 7 through the gear transmission assembly 12, driving the rotary tillage roller shaft 7 to rotate, and the sprockets of the transmission half shaft 11 on the other side transmit the power to the stubble burying roller shaft 1 through the chain transmission assembly 13, driving the stubble burying roller shaft 1 to rotate. The rotary tillage blade roller shaft 7 rotates to drive the rotary tillage blade wheel 8 to till the planting soil, crush the rhizomes and grass straws, and the stubble burying device operates synchronously. The stubble burying blade roller shaft 1 drives the stubble burying blade wheel 2 to rotate, and the grass straws are pressed into the soil through the stubble burying notch 5 on the arc-shaped outer edge of the stubble burying blade 4. The grass blocking grille 6 cooperates with the stubble burying blade wheel 2, and the stubble burying blade wheel 2 presses the grass straws or soil blocks blocked on the grass blocking grille 6 into the soil, thereby effectively burying the straws or grass stems after rotary tillage. The grass pressing plate 15 connected to the elastic plate 14 at the rear of the stubble burying device can further achieve the function of pressing grass and leveling the land. The elastic plate 14 connected to the grass pressing plate 15 and the reset spring 19 connecting rod 17 connected to the upper part thereof provide a certain elastic force and pressure for the grass pressing plate 15, and the grass straws are further pressed into the soil and compacted through the arc-shaped grass pressing teeth 16 arranged equidistantly at the lower part of the grass pressing plate 15.

Claims

1. A stubble burying device for a rotary tillage and returning machine, Characterized in that: It includes a stubble burying cutter roller shaft and stubble burying cutter wheels. Both ends of the stubble burying cutter roller shaft are pivotally connected to the machine frame body, and several stubble burying cutter wheels are equidistantly arranged on the stubble burying cutter roller shaft; each of the stubble burying cutter wheels includes several stubble burying cutters, and the stubble burying cutters are rotationally symmetrically arranged to form a cutter wheel; several stubble burying notches are provided on the upper part of the arc-shaped outer edge of each stubble burying cutter. The stubble burying notches are non-equilateral angled notches, the notch angle is greater than or equal to 90°, the long side is on the upper part of the arc-shaped outer edge of the stubble burying cutter, and the short side is on the lower part of the arc-shaped outer edge of the stubble burying cutter; the stubble burying cutter wheels are staggeredly arranged on the stubble burying cutter roller shaft.

2. The stubble burying device for a rotary tillage and returning machine according to claim 1, Characterized in that: It further includes a grass blocking grille. The grass blocking grille is composed of several vertical elastic teeth arranged in an equidistant array. The grass blocking grille is fixed on the machine frame body, in front of the stubble burying cutter roller shaft, and the grass blocking grille is inclined towards the stubble burying cutter roller shaft side; each stubble burying cutter wheel extends into each grille gap of the grass blocking grille.

3. A rotary tillage and returning machine with a stubble burying device, Characterized in that: It includes a frame body, a rotary tillage cutter roller shaft, rotary tillage cutter wheels, a stubble burying cutter roller shaft and stubble burying cutter wheels. Among them, the rotary tillage cutter roller shaft and the stubble burying cutter roller shaft are sequentially pivotally connected to the frame body. Several rotary tillage cutter wheels are equidistantly arranged on the rotary tillage cutter roller shaft, and several stubble burying cutter wheels are equidistantly arranged on the stubble burying cutter roller shaft; each of the stubble burying cutter wheels includes several stubble burying cutters, and the stubble burying cutters are rotationally symmetrically arranged to form a cutter wheel; several stubble burying notches are provided on the arc-shaped outer edge of each stubble burying cutter; the stubble burying notches are non-equilateral angled notches, the notch angle is greater than or equal to 90°, the long side is on the upper part of the arc-shaped outer edge of the stubble burying cutter, and the short side is on the lower part of the arc-shaped outer edge of the stubble burying cutter; the stubble burying cutter wheels are staggeredly arranged on the stubble burying cutter roller shaft.

4. The rotary tillage and returning machine with a stubble burying device according to claim 3, Characterized in that: It further includes a grass blocking grille. The grass blocking grille is composed of several elastic teeth arranged in an equidistant array. The grass blocking grille is fixed on the frame body, in front of the stubble burying cutter roller shaft, and the grass blocking grille is inclined towards the stubble burying cutter roller shaft side; each stubble burying cutter wheel extends into each grille gap of the grass blocking grille.

5. The rotary tillage and returning machine with a stubble burying device according to claim 3, Characterized in that: It further includes a transmission box, an input bevel gear shaft and two transmission half shafts. The transmission box is arranged at the front end of the frame body, the input bevel gear shaft is pivotally connected to the transmission box, the two transmission half shafts are respectively pivotally connected to both sides of the transmission box, and the bevel gear of the input bevel gear shaft meshes with the bevel gear of the transmission half shaft in the transmission box; one side transmission half shaft is connected to the rotary tillage cutter roller shaft through a transmission component, and the other side transmission half shaft is connected to the stubble burying cutter roller shaft through a transmission component.

6. The rotary tillage and returning machine with a stubble burying device according to claim 5, Characterized in that: A gear is provided at the outer end of the one side transmission half shaft and is connected to the gear of the rotary tillage cutter roller shaft through a gear transmission component; a sprocket is provided at the outer end of the other side transmission half shaft and is connected to the sprocket of the stubble burying cutter roller shaft through a chain transmission component.

7. The rotary tillage and returning machine with a stubble burying device according to claim 3, Characterized in that: A pressing grass plate is connected to the rear part of the frame body through an elastic plate, and several arc-shaped pressing grass teeth are arranged at equal intervals in the lower part of the pressing grass plate; a connecting rod is pivotally connected to the upper part of the pressing grass plate, a support rod is sleeved on the upper end of the connecting rod, and the other end of the support rod is fixed on the frame body; a return spring is also sleeved on the connecting rod, one end of the return spring is fixed on the connecting rod, and the other end is connected to the support rod.

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