Tillage depth control device for horticultural tractor

Abstract

The invention discloses a tillage depth control device for a horticultural tractor, and relates to the technical field of tractors. The tilling depth control device for the gardening tractor comprises the tractor and the like, the tractor is rotationally connected with a mounting plate frame through a universal ball, the mounting plate frame is rotationally connected with paired tilling frames through a power assembly, and the tractor is rotationally connected with paired adjusting hydraulic devices; the telescopic ends of the paired adjusting hydraulic devices are rotationally connected with the mounting plate frame, the mounting plate frame is rotationally connected with paired rotating shafts, the rotating shafts are fixedly connected with missing gears, the mounting plate frame is rotationally connected with paired knocking frames, and the knocking frames are fixedly connected with straight gears. By means of the parts such as the missing gear and the straight gear, the knocking frame can intermittently knock the tillage frame, so that the tillage frame vibrates and the adhered wet soil is shaken off, the adhesion soil is prevented from increasing the tillage difficulty of the tractor and affecting the subsequent tillage effect, and the tillage efficiency and quality of the horticultural tractor are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tractors, and in particular to a tillage depth control device for a garden tractor. Background Art

[0002] A horticultural tractor is an agricultural machine designed for horticulture and gardening operations. It is small, flexible and has moderate power. It can be divided into walk-behind tractors, four-wheel drive tractors, crawler tractors and intelligent tractors according to its structure and intelligence level. A horticultural tractor can adapt to the operation requirements of small and complex terrains such as orchards, vegetable fields and tea gardens. It is widely used in a variety of horticultural work such as ploughing, fertilization, transportation and lawn management, and can create good soil conditions for growing crops.

[0003] When using an existing garden tractor, it is necessary to adjust the tillage depth of the tillage frame through a control device according to the user's tillage needs. However, once the tillage depth of the garden tractor is deepened, the tillage frame will come into contact with the moist soil deep in the ground. When the tillage frame plows the moist soil, the soil may adhere to the blades of the tillage frame or get stuck between two adjacent blades, which will not only increase the tillage difficulty of the tractor, but also affect the subsequent tillage effect.

[0004] Based on the above situation, the present invention provides a tillage depth control device for a garden tractor with a function of preventing soil adhesion. Summary of the invention

[0005] In order to overcome the disadvantage that when the existing gardening tractor plows the wet soil, the soil may adhere to the blades of the tillage frame or get stuck between two adjacent blades, thereby increasing the tillage difficulty of the tractor and affecting the subsequent tillage effect, the present invention provides a tillage depth control device for a gardening tractor with the function of preventing soil adhesion.

[0006] A tillage depth control device for a gardening tractor comprises a tractor, a mounting plate frame, a tillage frame, an adjusting hydraulic device, a rotating shaft, a missing gear, a transmission belt, a spur gear and a knocking frame. The tractor is rotatably connected to the mounting plate frame through a universal ball, the mounting plate frame is rotatably connected to a pair of tillage frames through a power assembly, the tillage frames are fixedly connected with blades equidistantly distributed around the circumference, the tractor is rotatably connected to a pair of adjusting hydraulic devices, the telescopic ends of the pairs of adjusting hydraulic devices are rotatably connected to the mounting plate frame, the mounting plate frame is rotatably connected to a pair of rotating shafts, the rotating shafts are fixedly connected with the missing gears, a transmission belt is sleeved between the rotating shafts and the tillage frame, the mounting plate frame is rotatably connected to a pair of knocking frames, the knocking frames are in contact with and matched with the tillage frames, the knocking frames are fixedly connected with spur gears, and the spur gears mesh with the missing gears.

[0007] In addition, it is particularly preferred that a spraying mechanism is also included, which is arranged on a mounting plate frame, and the spraying mechanism includes a liquid storage barrel, a guide pipe, a spray rack, a push block, a push frame, an air cylinder, a tension spring and an air pipe, the pairs of liquid storage barrels are fixedly connected to the mounting plate frame, the mounting plate frame is fixedly connected with a pair of spray racks, the spray racks and the liquid storage barrels are fixedly connected and connected with a guide pipe, the gear is fixedly connected with push blocks equidistantly distributed around the circumference, the mounting plate frame is fixedly connected with a pair of air cylinders, the air cylinders are slidably connected with a push frame, the push frame and the push block are extrusion-fitted, a tension spring is fixedly connected between the push frame and the air cylinder, and the air pipe is fixedly connected and connected between the air cylinder and the liquid storage barrel.

[0008] Furthermore, it is particularly preferred that the gas cylinder is fixedly connected with a one-way valve, and the gas guide tube is also fixedly connected with a one-way valve.

[0009] In addition, it is particularly preferred that it also includes a dividing mechanism, which is arranged on the tractor, and the dividing mechanism includes a connecting frame, a threaded rod, a supporting frame, a dividing block and a guide frame, the guide frame is fixed to the tractor, the guide frame is slidably connected to the connecting frame, the guide frame is rotatably connected to the threaded rod, the threaded rod is threadedly connected to the connecting frame, the connecting frame is slidably connected to a pin, the pin is slidably connected to the guide frame, the tractor is fixed to the supporting frame, the supporting frame is slidably connected to the connecting frame, and the connecting frame is fixed with longitudinally distributed dividing blocks.

[0010] Furthermore, it is particularly preferred that the guide frame is provided with pairs of longitudinally distributed clamping grooves.

[0011] In addition, it is particularly preferred that a guiding mechanism is further included, the guiding mechanism is arranged on the tractor, the guiding mechanism includes a guiding frame and an elastic component, the elastic components distributed in a triangular shape are all fixed to the tractor, and the guiding frame is fixed between the telescopic ends of the elastic components distributed in a triangular shape.

[0012] In addition, it is particularly preferred that both sides of the guide frame are curved surfaces.

[0013] In addition, it is particularly preferred that it also includes a jacking mechanism, which is arranged on the tillage frame, and the jacking mechanism includes a jacking block, a jacking ring and an elastic cloth, the circumferentially equidistantly distributed top blocks are slidably connected to the tillage frame, pairs of jacking rings are fixedly connected between the circumferentially equidistantly distributed top blocks, and the elastic cloth is fixedly connected between the circumferentially equidistantly distributed top blocks.

[0014] Beneficial effects: 1. The present invention can make the knocking frame intermittently knock the tillage frame through the missing gears and spur gears and other components, so that the tillage frame vibrates and shakes off the adhered wet soil, so as to avoid the adhered soil increasing the difficulty of tractor tillage and affecting the subsequent tillage effect, thereby improving the tillage efficiency and quality of this garden tractor.

[0015] 2. The present invention can intermittently spray tea bran water onto the moist soil adhered to the tillage frame through components such as a spray frame and an air cylinder, thereby not only washing away the adhered moist soil to ensure the subsequent tillage effect, but also killing pests in the soil to create good soil conditions for subsequent crop planting, thereby improving the tillage quality and practicality of the garden tractor.

[0016] 3. The present invention enables the user to adjust the height of the dividing block as needed through components such as threaded rods and guide frames, and use the dividing blocks to divide the soil and the roots in the soil in advance, thereby reducing the difficulty of subsequent tillage of the tillage frame and improving the tillage efficiency of the horticultural tractor.

[0017] 4. The present invention can guide impurities such as stones on the ground to both sides of the tractor through components such as guide frames and elastic components, thereby preventing the tillage frame from colliding with impurities such as stones and being damaged during subsequent tillage, extending the service life of the tillage frame and improving the practicality of the garden tractor.

[0018] 5. The present invention uses components such as a top ring and an elastic cloth to enable the three top blocks to lift up in turn and push out the wet soil stuck between two adjacent blades of the tillage frame, thereby preventing the wet soil on the tillage frame from increasing the tillage difficulty of the tractor and affecting the subsequent tillage effect, thereby improving the tillage efficiency and quality of the horticultural tractor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the tractor, mounting plate frame, tillage frame and other components of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the components such as the rotating shaft, the missing gear and the transmission belt of the present invention.

[0022] Figure 4 It is a three-dimensional structural schematic diagram of components such as the transmission belt, spur gear and knocking frame of the present invention.

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the components such as the liquid storage barrel, the guide pipe and the spray rack of the present invention.

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the components such as the air cylinder, tension spring and air guide tube of the present invention.

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the connecting frame, threaded rods, supporting frame and other components of the present invention.

[0026] Figure 8It is a three-dimensional structural schematic diagram of the supporting frame, dividing blocks, guide frame and other components of the present invention.

[0027] Fig. 9 It is a three-dimensional structural schematic diagram of the tractor, guide frame, elastic component and other components of the present invention.

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the guide frame and the elastic component of the present invention.

[0029] Fig.11 It is a three-dimensional structural schematic diagram of the guide frame, elastic component, tillage frame and other components of the present invention.

[0030] Fig.12 It is a schematic diagram of the three-dimensional structure of the top block, the top ring and the elastic cloth component of the present invention.

[0031] In the figure: 1. tractor, 11. mounting plate frame, 12. tillage frame, 13. adjusting hydraulic press, 14. rotating shaft, 15. missing gear, 16. transmission belt, 17. spur gear, 18. knocking frame, 2. liquid storage barrel, 21. guide pipe, 22. spray frame, 23. push block, 24. push frame, 25. air cylinder, 26. tension spring, 27. air pipe, 3. connecting frame, 31. threaded rod, 32. supporting frame, 33. dividing block, 34. guide frame, 4. guide frame, 41. elastic component, 5. top block, 51. top ring, 52. elastic cloth. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope and application scope of the present invention are not limited.

[0033] Example 1 A tillage depth control device for a garden tractor, such as Figure 1-Figure 4 As shown, the tractor 1 includes a mounting plate frame 11, a tillage frame 12, an adjusting hydraulic device 13, a rotating shaft 14, a missing gear 15, a transmission belt 16, a spur gear 17 and a knocking frame 18. The right side of the tractor 1 is rotatably connected to the mounting plate frame 11 through a universal ball, and the front and rear sides of the lower part of the mounting plate frame 11 are rotatably connected to the tillage frame 12 through a power component. The outside of the tillage frame 12 is fixed with blades distributed equidistantly around the circumference. The front and rear parts of the right side of the tractor 1 are rotatably connected to the adjusting hydraulic device 13. The front and rear adjusting devices are The telescopic ends of the hydraulic press 13 are rotatably connected to the mounting plate frame 11, and the front and rear sides of the mounting plate frame 11 are rotatably connected with a rotating shaft 14, and a missing gear 15 is fixedly connected to the outside of the rotating shaft 14. A transmission belt 16 is sleeved between the rotating shaft 14 and the adjacent tillage frame 12. The front and rear sides of the lower part of the mounting plate frame 11 are rotatably connected with a knocking frame 18, and the knocking frame 18 is in contact with the tillage frame 12. The sides of the front and rear knocking frames 18 that are away from each other are fixedly connected with a spur gear 17, and the spur gear 17 is meshed with the adjacent missing gear 15.

[0034] When workers need to plow the land, they can first start the tractor 1 and drive the mounting plate frame 11 and the tillage frame 12 to move to the left. During this period, the workers can start the power component and drive the tillage frame 12 to rotate clockwise to plow the land. The workers can also control the extension or shortening of the hydraulic cylinder 13 as needed, thereby controlling the mounting plate frame 11 and the tillage frame 12 to rotate downward or upward, so as to adjust the tillage depth of the tillage frame 12. When the workers control the extension of the hydraulic cylinder 13 and make the tillage frame 12 and other components rotate downward, the tillage frame 12 will plow the deeper soil, and the soil deep in the land is usually more moist. At this time, the moist soil may stick to the blades of the tillage frame 12 or get stuck between two adjacent blades, but the clockwise rotation of the tillage frame 12 will pass through the transmission skin. The belt 16 and the rotating shaft 14 drive the missing gear 15 to rotate clockwise. When the missing gear 15 rotates to engage with the spur gear 17, the missing gear 15 will drive the spur gear 17 and the knocking frame 18 to rotate counterclockwise, and the knocking frame 18 will then separate from the tillage frame 12. When the missing gear 15 rotates to separate from the spur gear 17, the knocking frame 18 will drive the spur gear 17 to rotate clockwise and reset under the action of its own gravity and knock on the tillage frame 12. In this cycle, the knocking frame 18 can intermittently knock on the tillage frame 12, so that the tillage frame 12 vibrates and shakes off the adhered wet soil, so as to avoid the adhered soil increasing the tillage difficulty of the tractor 1 and affecting the subsequent tillage effect. After the tillage is completed, the hydraulic valve 13 is adjusted to rotate the mounting plate frame 11 and the tillage frame 12 and other components upward to reset, and the tractor 1 and the power assembly can be turned off.

[0035] Example 2 On the basis of Example 1, Figure 5 and Figure 6 As shown, a spraying mechanism is also included, which is arranged on the mounting plate frame 11. The spraying mechanism includes a liquid storage barrel 2, a guide pipe 21, a spray frame 22, a push block 23, a push frame 24, an air cylinder 25, a tension spring 26 and an air guide pipe 27. The two liquid storage barrels 2 are respectively fixed to the front and rear sides of the top of the mounting plate frame 11, and the spray frame 22 is fixed to the front and rear sides of the lower part of the mounting plate frame 11. The spray frame 22 is fixed to the adjacent liquid storage barrel 2 and is connected to the guide pipe 21. The side of the missing gear 15 away from the mounting plate frame 11 is fixed to the push blocks 23 equidistantly distributed around the circumference, and the air cylinder 25 is fixed to the front and rear sides of the top of the mounting plate frame 11. The push frame 24 is slidably connected to the right side of the air cylinder 25. The push frame 24 is squeezed and matched with the adjacent push block 23. A tension spring 26 is fixed between the push frame 24 and the adjacent air cylinder 25, and an air guide pipe 27 is fixed to the air cylinder 25 and is connected to the adjacent liquid storage barrel 2.

[0036] like Figure 5 and Figure 6As shown, a one-way valve is fixedly connected to the upper right side of the air cylinder 25, and a one-way valve is also fixedly connected to the inside of the air guide pipe 27.

[0037] When the tillage frame 12 drives the missing gear 15 to rotate clockwise through the transmission belt 16, the push block 23 will also rotate clockwise with the missing gear 15, and the push block 23 will first contact and squeeze the push frame 24 when rotating clockwise, so that the push frame 24 moves to the right and injects the air in the air cylinder 25 into the liquid storage barrel 2 through the air guide pipe 27. The tension spring 26 is then stretched, and the injected air will also squeeze the tea bran water in the liquid storage barrel 2, so that the tea bran water first enters the spray frame 22 through the guide pipe 21, and then is sprayed out from the spray frame 22. When the push block 23 rotates to contact the push frame 24 When separated, the push frame 24 will move to the left and reset under the action of the tension spring 26, and suck the outside air into the air cylinder 25 through the one-way valve on the air cylinder 25 for replenishment, while the one-way valve on the air guide pipe 27 can prevent the tea bran water and air in the liquid storage barrel 2 from flowing back. In this way, the spray frame 22 can be used to intermittently spray tea bran water on the moist soil adhered to the tillage frame 12, so that the adhered moist soil can be washed away to ensure the subsequent tillage effect, and the tea bran water can also be used to kill pests in the soil to create good soil conditions for subsequent crop planting.

[0038] like Figure 7 and Figure 8 As shown, a splitting mechanism is also included, which is arranged on the tractor 1. The splitting mechanism includes a connecting frame 3, a threaded rod 31, a support frame 32, a splitting block 33 and a guide frame 34. The guide frame 34 is fixed to the top of the right side of the tractor 1, and the lower part of the guide frame 34 is slidably connected to the connecting frame 3, and the middle part of the guide frame 34 is rotatably connected to the threaded rod 31, and the threaded rod 31 is threadedly connected to the connecting frame 3. A pin is slidably connected to the right side of the connecting frame 3, and the pin is slidably connected to the guide frame 34. A support frame 32 is fixed to the lower part of the right side of the tractor 1, and the support frame 32 is slidably connected to the connecting frame 3. The bottom of the connecting frame 3 is fixed with splitting blocks 33 distributed longitudinally front and back.

[0039] like Figure 7 and Figure 8 As shown, the guide frame 34 is provided with vertically distributed slots on both the front and rear sides.

[0040] Before starting the tractor 1, the worker can first rotate the threaded rod 31 forward as needed, thereby driving the connecting frame 3 and the dividing block 33 to move downward and insert into the soil, and then insert the pin on the connecting frame 3 into the slot on the guide frame 34, so as to fix the position of the connecting frame 3 and the dividing block 33. When the tractor 1 drives the dividing block 33 and other components to move to the left, the dividing block 33 can divide the soil and the roots in the soil in advance, thereby reducing the difficulty of subsequent tillage of the tillage frame 12. After the tillage is completed, the pin is removed and the threaded rod 31 is rotated in the opposite direction, so that the connecting frame 3 and the dividing block 33 can move upward and reset.

[0041] like Fig. 9 and Fig.10 As shown, a guiding mechanism is also included, which is arranged on the tractor 1. The guiding mechanism includes a guiding frame 4 and an elastic component 41. The three elastic components 41 distributed in a triangle are all fixedly connected to the bottom of the tractor 1, and the guiding frame 4 is fixedly connected between the telescopic ends of the elastic components 41 distributed in a triangle.

[0042] like Fig. 9 and Fig.10 As shown, both the front and rear sides of the guide frame 4 are arc surfaces.

[0043] When the tractor 1 drives the mounting plate frame 11, the tillage frame 12 and other components to move to the left, the guide frame 4 and the elastic component 41 will also move to the left with the tractor 1, and the guide frame 4 will remain in close contact with the ground under the action of its own gravity and the elastic force of the elastic component 41. Since the guide frame 4 is provided with an inclined surface and an arc surface, the guide frame 4 can guide impurities such as stones on the ground to the front and rear sides of the tractor 1, thereby preventing the tillage frame 12 from colliding with impurities such as stones and being damaged during the subsequent tillage process, thereby extending the service life of the tillage frame 12.

[0044] like Fig.11 and Fig.12 As shown, it also includes a jacking mechanism, which is arranged on the tillage frame 12. The jacking mechanism includes a jacking block 5, a jacking ring 51 and an elastic cloth 52. The circumferentially equidistantly distributed jacking blocks 5 are all slidably connected to the outside of the tillage frame 12. Two front and rear jacking rings 51 are fixedly connected between the circumferentially equidistantly distributed jacking blocks 5, and the elastic cloth 52 is fixedly connected between the circumferentially equidistantly distributed jacking blocks 5.

[0045] When the worker drives the tillage frame 12 and other components to rotate downward by adjusting the hydraulic press 13, the top ring 51 and other components will also rotate downward with the tillage frame 12. When the top ring 51 rotates downward until it contacts the ground, the lower part of the top ring 51 will be squeezed by the ground and deform and shrink upward, thereby driving the lower top block 5 to move inward, and the upper part of the top ring 51 will immediately deform and expand upward and drive the upper top block 5 to move outward, and the upper elastic cloth 52 will be stretched immediately. When the power assembly drives the tillage frame 12 to rotate clockwise, the top ring 51 and other components The parts will also rotate clockwise with the tillage frame 12, and the clockwise rotation of the top ring 51 can make the three top blocks 5 rotate to the upper part in turn, so that the three top blocks 5 can move outward in turn and push out the wet soil stuck between two adjacent blades of the tillage frame 12, so as to avoid the wet soil on the tillage frame 12 increasing the tillage difficulty of the tractor 1 and affecting the subsequent tillage effect. When the tillage frame 12 and the top ring 51 and other parts are rotated upward to reset, the top ring 51 and the elastic cloth 52 will return to their original state under the action of their own elasticity.

[0046] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tillage depth control device for a garden tractor, comprising a tractor (1), a mounting plate frame (11), a tillage frame (12) and an adjusting hydraulic device (13), wherein the tractor (1) is rotatably connected to the mounting plate frame (11) via a universal ball, the mounting plate frame (11) is rotatably connected to a pair of tillage frames (12) via a power assembly, the tillage frames (12) are fixedly connected with blades equidistantly distributed around the circumference, the tractor (1) is rotatably connected to a pair of adjusting hydraulic devices (13), and the telescopic ends of the pair of adjusting hydraulic devices (13) are rotatably connected to the mounting plate frame (11), wherein: The invention also comprises a rotating shaft (14), a missing gear (15), a transmission belt (16), a spur gear (17) and a knocking frame (18). The mounting plate frame (11) is rotatably connected to a pair of rotating shafts (14). The rotating shaft (14) is fixedly connected to the missing gear (15). A transmission belt (16) is sleeved between the rotating shaft (14) and the tillage frame (12). The mounting plate frame (11) is rotatably connected to a pair of knocking frames (18). The knocking frames (18) are in contact with the tillage frame (12). The knocking frames (18) are fixedly connected to the spur gear (17). The spur gear (17) meshes with the missing gear (15).

2. A tillage depth control device for a garden tractor according to claim 1, characterized in that: The invention also includes a spraying mechanism, which is arranged on the mounting plate frame (11). The spraying mechanism includes a liquid storage barrel (2), a flow guide pipe (21), a spray frame (22), a push block (23), a push frame (24), an air cylinder (25), a tension spring (26) and an air guide pipe (27). The paired liquid storage barrels (2) are fixedly connected to the mounting plate frame (11). The mounting plate frame (11) is fixedly connected to the paired spray frames (22). The spray frames (22) and the liquid storage barrels (2) are connected to the spray frames (22). A guide tube (21) is fixedly connected and communicated with the missing gear (15), push blocks (23) equidistantly distributed on the circumference are fixedly connected to the mounting plate frame (11), a pair of air cylinders (25) are fixedly connected to the air cylinder (25), a push frame (24) is slidably connected to the air cylinder (25), the push frame (24) and the push block (23) are pressed together, a tension spring (26) is fixedly connected between the push frame (24) and the air cylinder (25), and an air guide tube (27) is fixedly connected and communicated with the air cylinder (25) and the liquid storage barrel (2).

3. A tillage depth control device for a garden tractor according to claim 2, characterized in that: The gas cylinder (25) is fixedly connected with a one-way valve, and the air guide pipe (27) is also fixedly connected with a one-way valve.

4. A tillage depth control device for a garden tractor according to claim 3, characterized in that: The invention also comprises a splitting mechanism, which is arranged on the tractor (1), and comprises a connecting frame (3), a threaded rod (31), a supporting frame (32), a splitting block (33) and a guide frame (34). The guide frame (34) is fixedly connected to the tractor (1), the guiding frame (34) is slidably connected to the connecting frame (3), the guiding frame (34) is rotatably connected to the threaded rod (31), the threaded rod (31) is threadedly connected to the connecting frame (3), the connecting frame (3) is slidably connected to a latch, the latch is slidably connected to the guide frame (34), the tractor (1) is fixedly connected to the supporting frame (32), the supporting frame (32) is slidably connected to the connecting frame (3), and the connecting frame (3) is fixedly connected to the splitting blocks (33) distributed longitudinally.

5. A tillage depth control device for a garden tractor according to claim 4, characterized in that: The guide frame (34) There are pairs of longitudinally distributed card slots.

6. A tillage depth control device for a garden tractor according to claim 5, characterized in that: The invention also comprises a guiding mechanism, which is arranged on the tractor (1), and comprises a guiding frame (4) and elastic components (41), wherein the elastic components (41) distributed in a triangular shape are all fixedly connected to the tractor (1), and the guiding frame (4) is fixedly connected between the telescopic ends of the elastic components (41) distributed in a triangular shape.

7. A tillage depth control device for a garden tractor according to claim 6, characterized in that: Among them guide Both sides of the frame (4) are curved surfaces.

8. A tillage depth control device for a garden tractor according to claim 7, characterized in that: The invention also comprises a pushing mechanism, which is arranged on a tillage frame (12), and comprises a pushing block (5), a pushing ring (51) and an elastic cloth (52). The pushing blocks (5) which are evenly spaced around the circumference are all slidably connected to the tillage frame (12), a pair of pushing rings (51) are fixedly connected between the pushing blocks (5) which are evenly spaced around the circumference, and an elastic cloth (52) is fixedly connected between the pushing blocks (5) which are evenly spaced around the circumference.

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