Agricultural rotary cultivator suitable for different types of cultivated land requirements

Abstract

The invention relates to the field of agricultural machinery, in particular to an agricultural rotary cultivator adapting to different types of cultivated land requirements, which comprises a gearbox, rotary tillage shafts are rotatably connected to two sides of the gearbox, control grooves are formed in the rotary tillage shafts, one end of each rotary tillage shaft is fixedly connected with a protective cover through a bearing seat, and the gearbox is fixedly connected with the protective cover. A plurality of rotary blades distributed in an array mode are rotatably connected to the rotary tillage shaft, double-motion motors are fixedly connected to the two ends of the rotary tillage shaft correspondingly, and rotating mechanisms are connected to output shafts of the double-motion motors. The large gear can be controlled to rotate through the rotating mechanisms, the large gear drives the small gear to rotate, and then the worm drives the worm gear to rotate; the worm gear drives the rotary blade to rotate, so that the angle of the rotary blade can be adjusted, and the problem that when rotary tillage operation is carried out on different types of cultivated land, switching can only be carried out by replacing different rotary blades, and consequently carrying is inconvenient is solved.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery, and in particular to an agricultural rotary tiller that can adapt to the needs of different types of cultivated land. Background Art

[0002] my country possesses a vast array of different types of arable land. This primarily includes paddy fields used for growing aquatic crops, irrigated land with guaranteed water sources and irrigation facilities, and dry land that relies primarily on natural precipitation to grow drought-tolerant crops. Cultivating this land typically requires the use of a rotary tiller, which breaks up soil clumps and softens the ground, facilitating root growth and nutrient absorption. However, different types of arable land have varying degrees of hardness and require varying tillage depths. This necessitates the use of different agricultural machinery, creating inconvenience for farmers with different types of land.

[0003] Existing rotary tillers have the following deficiencies when cultivating: 1. The angle of the rotary tiller blade of the traditional rotary tiller is fixed. Different cultivated land has different requirements and uses different rotary tillers. Therefore, when performing rotary tillage operations on different types of cultivated land, the only way to switch is to replace different rotary tillers, which makes it inconvenient to carry, difficult to operate, and time-consuming and labor-intensive. 2. The rotary tillage effect is poor for hard arable land such as dry land. After rotary tillage, there are still many large clods of soil, and the clod breakage rate is low, which is not conducive to land cultivation. 3. When performing rotary tillage operations on soft soil such as sand, silt and paddy fields, the rotary tiller can easily sink into the soil and become unable to move, thus putting the rotary tiller in a trapped state.

[0004] To this end, the present invention provides an agricultural rotary tiller that can adapt to the needs of different types of cultivated land. Summary of the Invention

[0005] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides an agricultural rotary tiller that can adapt to the needs of different types of cultivated land.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an agricultural rotary tiller that can adapt to the needs of different types of cultivated land, including a gearbox, a rotary tilling shaft and a shield. The gearbox is rotatably connected to the rotary tilling shaft on both sides, and a control groove is opened in the rotary tilling shaft. One end of the rotary tilling shaft is fixedly connected to the shield through a bearing seat. The gearbox is fixedly connected to the shield. A number of rotary tilling blades distributed in an array are rotatably connected to the rotary tilling shaft. Both ends of the rotary tilling shaft are fixedly connected to a dual-motion motor. A rotating mechanism is connected to the output shaft of the dual-motion motor. The rotating mechanism is located in the control groove. The rotating mechanism is used to drive the rotary tilling blades to rotate synchronously, thereby adjusting the posture of the rotary tilling blades. One end of the dual-motion motor is connected to a moving mechanism. The moving mechanism is used to drive the rotary tilling blades to crush the soil blocks.

[0007] Preferably, the rotating mechanism includes a large gear fixedly connected to the output end of the dual-motion motor, a plurality of small gears are arrayed inside the rotary tillage shaft, and the plurality of small gears are all meshed with the large gear. A worm is fixedly connected to the small gear, and both ends of the worm are rotatably connected to the rotary tillage shaft. A worm wheel is fixedly connected to one end of the rotary tillage blade, and the worm wheel is meshed with the worm.

[0008] Preferably, the moving mechanism includes a straight rod rotatably connected to the output end of the dual-motion motor, a plurality of long racks are fixedly connected to the straight rod, a movable groove is provided in the rotary blade, a rotating shaft is rotatably connected in the rotary blade, the rotating shaft is located in the movable groove, one end of the rotating shaft is fixedly connected to a driving gear, the driving gear corresponds to the long rack one by one and is meshed with each other, an extension unit and a stretching unit are connected to the rotating shaft, and the extension unit and the stretching unit are staggered.

[0009] Preferably, a plurality of sliding cylinders are slidably connected to the straight rod, a plurality of connecting rods are arrayed on the sliding cylinder, the connecting rods are staggered with the worm, and the connecting rods are fixedly connected to the inner wall of the rotary tillage shaft.

[0010] Preferably, the extending unit includes a shift rod, and several shift rods are symmetrically connected to the center of the rotating shaft. Several crushing grooves are opened on both sides of the rotary blade, and several crushing grooves are connected to the movable groove. A crushing knife is movably connected in the crushing groove, and the crushing knife is located on the movement trajectory of the shift rod, which is convenient for the shift rod to push the crushing knife out of the crushing groove.

[0011] Preferably, a locking groove is provided on the surface of the crushing knife, and a movable groove is provided on the inner walls on both sides of the rotary tiller. A push rod and a locking rod are provided in the movable groove, one end of the push rod and the locking rod contact each other, and the other end of the locking rod cooperates with the locking groove.

[0012] Preferably, a second spring is provided on both sides of the push rod, one end of the second spring is fixedly connected to the rotary tiller, and a tensioning spring is fixedly connected between the locking rod and the movable groove to facilitate the resetting of the crushing knife after use.

[0013] Preferably, the extension unit includes an arc-shaped rack, and several arc-shaped racks are symmetrically connected to the rotating shaft. The arc-shaped racks are staggered with the shift rod. Several accommodating grooves are opened on both sides of the rotary tiller, and several accommodating grooves are connected to the movable groove. A widening plate is movably connected in the accommodating groove, and several gear telescopic structures are symmetrically connected in the center of the movable groove. One end of the gear telescopic structure is rotatably connected to the widening plate, and the other end of the gear telescopic structure is engaged with the arc-shaped rack. The gear telescopic structure facilitates the extension of the widening plate to increase the contact area between the rotary tiller and the soil.

[0014] Preferably, the gear telescopic structure includes a support rod fixedly connected in the movable groove, one end of the support rod is rotatably connected to the first gear, the first gear corresponds to the arc-shaped rack one-to-one and is located on the motion trajectory of the arc-shaped rack, the first gear is fixedly connected to the second gear through a connecting rod, the second gear is meshed with the third gear, the second gear and the third gear are connected by a connecting plate, one side of the third gear is fixedly connected to a rotating rod, and the rotating rod is rotatably connected to the widening plate.

[0015] Preferably, a first spring is fixedly connected between the widening plate and the movable groove, and the first spring facilitates the resetting of the widening plate.

[0016] The beneficial effects are as follows: 1. The present invention can control the rotation of the large gear through the rotation mechanism, the large gear drives the small gear to rotate, and then the worm drives the worm wheel to rotate through the worm, and the worm wheel drives the rotary blade to rotate, so that the angle of the rotary blade can be adjusted; 2. The present invention can push the crushing blade out of the crushing groove through the extension unit via the lever. When the crushing blade is extended, it will contact the hard soil after the rotary tiller enters the hard soil. The diamond-shaped crushing blade will then crush the hard soil cut by the rotary tiller again, thereby improving the crushing rate of the hard soil. 3. The present invention can push the widening plate out of the accommodating groove through the extension unit through the arc-shaped rack and gear telescopic structure, thereby increasing the contact area with the land, making it difficult for the rotary tiller to get stuck in the paddy field or facilitating the rotary tiller to escape when it is stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of the present invention; Figure 2 A partial cross-sectional view of the rotary tillage shaft of the present invention; Figure 3 for Figure 2 A in the enlarged structural diagram; Figure 4 It is a schematic diagram of a partial three-dimensional structure of the straight rod in the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the rotary tiller in the present invention; Figure 6 This is a schematic diagram of a first top view of the rotary tiller blade of the present invention; Figure 7 This is a schematic diagram of a second top view of the rotary tiller blade of the present invention; Figure 8 It is a schematic diagram of the partial structure of the rotary tiller in the present invention; Figure 9 Schematic diagram of the structure of the locking groove in the present invention; Figure 10 for Figure 9 A schematic diagram of the structure at point B in FIG. Figure 11 The state of the rotary tillage blade of the present invention when rotary tilling land with a relatively high hardness; Figure 12 This is the state of the rotary tillage blade when rotary tilling a paddy field according to the present invention.

[0018] The names and serial numbers of the parts in the figure are: 1-rotary tillage shaft, 101-control slot, 2-gearbox, 3-shield, 4-rotary tillage blade, 41-movable slot, 5-double-motion motor, 6-large gear, 7-worm, 8-worm gear, 9-pinion, 10-straight rod, 11-sliding cylinder, 111-connecting rod, 12-rotating shaft, 13-driving gear, 14-long rack, 15-arc rack, 16-gear telescopic structure, 161-first gear, 162-second gear, 163-third gear, 164-connecting rod, 165-rotating rod, 166-support rod, 17-widening plate, 171-accommodating slot, 18-first spring, 19-shift lever, 20-crushing slot, 21-crushing blade, 22-locking slot, 23-push rod, 24-locking rod, 25-second spring, 26-tensioning spring. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings. Example

[0020] An agricultural rotary tiller that adapts to the needs of different types of cultivated land, such as Figure 1-12 As shown, it includes a gearbox 2, both sides of the gearbox 2 are rotatably connected to a rotary tillage shaft 1, a control slot 101 is opened in the rotary tillage shaft 1, one end of the rotary tillage shaft 1 is fixedly connected to a shield 3 through a bearing seat, the gearbox 2 is fixedly connected to the shield 3, and five array-distributed rotary tillage blades 4 are rotatably connected to the rotary tillage shaft 1, both ends of the rotary tillage shaft 1 are fixedly connected to a double-motion motor 5, the double-motion motor 5 is a ball spline shaft double-motion motor, and a rotating mechanism is connected to the output shaft of the double-motion motor 5, the rotating mechanism is located in the control slot 101, and the rotating mechanism is used to drive the rotary tillage blades 4 to rotate synchronously, thereby adjusting the posture of the rotary tillage blades 4, and one end of the double-motion motor 5 is connected to The moving mechanism is used to drive the rotary tiller 4 to break up the soil. When in use, people adjust the rotary tiller 4 of this agricultural rotary tiller to different states according to different types of cultivated land. When it is necessary to adjust the rotary tiller 4, people start the dual-motion motor 5, and the dual-motion motor 5 drives the rotating mechanism to work, and the rotating mechanism drives the rotary tiller 4 to rotate, and then the rotary tiller 4 can be adjusted to an appropriate state. When it is necessary to perform rotary tillage operations on land or paddy fields with higher hardness, the dual-motion motor 5 drives the moving mechanism to work, and then adjusts the rotary tiller 4, so that this agricultural rotary tiller can be suitable for different types of cultivated land and has stronger adaptability.

[0021] The rotating mechanism includes a large gear 6 fixedly connected to the output end of the dual-motion motor 5, and five small gears 9 are arrayed in the rotary tillage shaft 1. The five small gears 9 are all engaged with the large gear 6. A worm 7 is fixedly connected to the small gear 9, and both ends of the worm 7 are rotatably connected to the rotary tillage shaft 1. One end of the rotary tiller 4 is fixedly connected to a worm wheel 8, and the worm wheel 8 is engaged with the worm 7. Through the arrangement of the large gear 6, small gear 9, worm wheel 8 and worm 7, the worm 7 can drive the worm wheel 8 to rotate, and then the posture of the rotary tiller 4 can be adjusted to adapt to different types of cultivated land.

[0022] The moving mechanism includes a straight rod 10 rotatably connected to the output end of the dual-motion motor 5, and five groups of long racks 14 are fixedly connected to the straight rod 10, each group of long racks 14 has five, and a movable groove 41 is opened in the rotary blade 4, and a rotating shaft 12 is rotatably connected in the rotary blade 4, and the rotating shaft 12 is located in the movable groove 41. One end of the rotating shaft 12 is fixedly connected to a driving gear 13, and the driving gear 13 corresponds to the long rack 14 one by one and is meshed with each other. An extension unit and a stretching unit are connected to the rotating shaft 12, and the extension unit and the stretching unit are staggered. The extension unit can adapt to land with higher hardness, improve the crushing rate of the soil of the extension unit, which is beneficial to people's planting, and the stretching unit can adapt to softer land such as paddy fields, increase the ability of the agricultural rotary tiller to escape, and will not sink into the soil.

[0023] There are four sliding cylinders 11 slidingly connected to the straight rod 10. The sliding cylinder 11 can provide support for the straight rod 10 to facilitate the sliding of the straight rod 10. There are five connecting rods 111 arrayed on the sliding cylinder 11. The connecting rods 111 are staggered with the worm 7 and will not affect the rotation of the worm 7. The connecting rods 111 are fixedly connected to the inner wall of the rotary tillage shaft 1.

[0024] The extending unit includes a shift lever 19, and five groups of shift levers 19 are symmetrically connected to the center of the rotating shaft 12. Five groups of crushing grooves 20 are opened on both sides of the rotary tillage blade 4, and the five groups of crushing grooves 20 are connected to the movable groove 41. A crushing knife 21 is movably connected in the crushing groove 20. The crushing knife 21 is located on the motion trajectory of the shift lever 19. The crushing knife 21 corresponds to the shift lever 19 one by one, which makes it convenient for the shift lever 19 to push the crushing knife 21 out of the crushing groove 20. The crushing knife 21 is in the shape of a diamond, which is convenient for crushing large pieces of hard soil and improving the crushing rate.

[0025] A locking groove 22 is provided on the surface of the crushing knife 21, and a movable groove is provided on the inner walls on both sides of the rotary tillage knife 4. A push rod 23 and a locking rod 24 are provided in the movable groove. One end of the push rod 23 and the locking rod 24 are in contact with each other, and the other end of the locking rod 24 cooperates with the locking groove 22. After the crushing knife 21 is extended, the crushing knife 21 can be fixed by the push rod 23 and the locking rod 24, so that the crushing knife 21 can remain in the extended state, which is beneficial to the crushing of large lumps of soil.

[0026] A second spring 25 is provided on both sides of the push rod 23, one end of the second spring 25 is fixedly connected to the rotary tiller 4, and a tensioning spring 26 is fixedly connected between the locking rod 24 and the movable groove to facilitate the reset of the crushing knife 21 after use.

[0027] The extension unit includes an arc-shaped rack 15, and five groups of arc-shaped racks 15 are symmetrically connected to the rotating shaft 12. The arc-shaped racks 15 and the shift rod 19 are staggered. Five groups of accommodating grooves 171 are opened on both sides of the rotary tiller 4. The accommodating grooves 171 and the crushing grooves 20 are staggered. The five groups of accommodating grooves 171 are all connected to the movable groove 41. A widening plate 17 is movably connected in the accommodating groove 171. Five groups of gear telescopic structures 16 are symmetrically connected in the center of the movable groove 41. The gear telescopic structures 16 correspond one-to-one to the widening plates 17 and the arc-shaped racks 15. The gear telescopic structures 16 facilitate the extension of the widening plates 17 to increase the contact area between the rotary tiller 4 and the land.

[0028] The gear telescopic structure 16 includes a support rod 166 fixedly connected to the movable groove 41, one end of the support rod 166 is rotatably connected to the first gear 161, the first gear 161 corresponds to the arc-shaped rack 15 one-to-one and is located on the motion trajectory of the arc-shaped rack 15, the first gear 161 is fixedly connected to the second gear 162 through a connecting rod 164, the second gear 162 is meshed with the third gear 163, the rotating shaft of the second gear 162 and the rotating shaft of the third gear 163 are connected by a connecting plate, one side of the third gear 163 is fixedly connected to a rotating rod 165, and the rotating rod 165 is rotatably connected to the widening plate 17.

[0029] A first spring 18 is fixedly connected between the widening plate 17 and the movable groove 41 , and the first spring 18 facilitates the resetting of the widening plate 17 .

[0030] When people are performing rotary tillage operations on different types of cultivated land, they start the dual-motion motor 5, which drives the large gear 6 to rotate, and the large gear 6 drives the small gear 9 to rotate, and then drives the worm wheel 8 to rotate through the worm 7, and the worm wheel 8 drives the rotary tiller 4 to rotate, so that the angle of the rotary tiller 4 can be adjusted; when it is necessary to perform rotary tillage operations on irrigated land or land with low hardness, people adjust the angle between the rotary tiller 4 and the rotary tillage shaft 1 to 45 degrees, so that the soil penetration angle is convenient for improving the effect of rotary tillage; when it is necessary to perform rotary tillage operations on dry ... When performing rotary tillage on land with higher hardness, people adjust the angle between the rotary tiller 4 and the rotary tiller shaft 1 to 90 degrees, so that the rotary tiller 4 can better enter the soil, reduce the chance of the rotary tiller 4 idling, and improve the rotary tillage efficiency; when rotary tillage is required on paddy fields or soft soil or the rotary tiller is trapped in silt, people adjust the angle between the rotary tiller 4 and the rotary tiller shaft 1 to 180 degrees, so as to increase the contact area between the rotary tiller 4 and the land or silt, which can effectively increase the contact area, reduce the entrapment rate or enable the rotary tiller to escape from the trapped state.

[0031] When it is necessary to perform rotary tillage on dry land or land with high hardness, people start the dual-motion motor 5, which controls the straight rod 10 to perform linear motion, and the straight rod 10 drives the long rack 14 to perform linear motion, thereby driving the rotating shaft 12 and the driving gear 13 to rotate, and the rotating shaft 12 drives the dial rod 19 to rotate, and the dial rod 19 pushes the crushing knife 21 to extend from the crushing groove 20. When the crushing knife 21 is fully extended, people turn off the dual-motion motor 5, and the dual-motion motor 5 stops working. The dial rod 19 supports the crushing knife 21 and fixes the crushing knife 21. When the crushing knife 21 is extended, the crushing knife 21 will push the push rod 23 to move , the push rod 23 drives the locking rod 24 to move, the second spring 25 and the tensioning spring 26 contract, and when the crushing knife 21 is fully extended, the push rod 23 and the locking rod 24 move into place, and the locking rod 24 is located in the locking groove 22, and then the locking rod 24 can fix the crushing knife 21, ensuring that the crushing knife 21 will not retreat when it comes into contact with hard soil. At the same time, the crushing knives 21 on both sides are extended and will come into contact with the hard soil after the rotary tillage knife 4 enters the hard soil, and then the diamond-shaped crushing knife 21 will crush the hard soil cut by the rotary tillage knife 4 again, thereby improving the crushing rate of the hard soil, reducing repeated rotary tillage, and facilitating people's planting and seed germination.

[0032] When rotary tillage is required on paddy fields or soft soil, the dual motion motor 5 is started, and the dual motion motor 5 controls the straight rod 10 to perform linear motion, and the straight rod 10 drives the long rack 14 to perform linear motion, thereby driving the rotating shaft 12 and the driving gear 13 to rotate, and the rotating shaft 12 drives the arc rack 15 to rotate, and the arc rack 15 drives the first gear 161 to rotate when it is engaged with the first gear 161, and then drives the second gear 162 to rotate by driving the connecting rod 164, and the second gear 162 drives the third gear 163. When the widening plate 17 is fully extended, the connecting rod 164 and the rotating rod 165 are on the same horizontal plane, and the entire gear telescopic structure 16 is in an extended state, thereby increasing the contact area with the land, making it less likely for the rotary tiller to be trapped in the paddy field or facilitating the escape of the rotary tiller when trapped. When the widening plate 17 is extended outward, the first spring 18 is compressed, thereby providing power for the reset of the widening plate 17.

[0033] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all modifications and equivalent structures and functions.

Claims

1. An agricultural rotary tiller adapted to the needs of different types of cultivated land, characterized in that: The invention comprises a gearbox (2), wherein both sides of the gearbox (2) are rotatably connected to a rotary tillage shaft (1), a control slot (101) is provided in the rotary tillage shaft (1), one end of the rotary tillage shaft (1) is fixedly connected to a shield (3) via a bearing seat, the gearbox (2) is fixedly connected to the shield (3), a plurality of rotary tillage blades (4) distributed in an array are rotatably connected to the rotary tillage shaft (1), both ends of the rotary tillage shaft (1) are fixedly connected to a dual-motion motor (5), an output shaft of the dual-motion motor (5) is connected to a rotating mechanism, the rotating mechanism is located in the control slot (101), the rotating mechanism is used to drive the rotary tillage blades (4) to rotate synchronously, and thus adjust the posture of the rotary tillage blades (4), one end of the dual-motion motor (5) is connected to a moving mechanism, the moving mechanism is used to drive the rotary tillage blades (4) to move and crush soil clods.

2. The agricultural rotary tiller adapted to different types of cultivated land according to claim 1, characterized in that: The moving mechanism comprises a straight rod (10) rotatably connected to the output end of the dual-motion motor (5), a plurality of long racks (14) are fixedly connected to the straight rod (10), a movable groove (41) is provided in the rotary tiller (4), a rotating shaft (12) is rotatably connected in the rotary tiller (4), the rotating shaft (12) is located in the movable groove (41), one end of the rotating shaft (12) is fixedly connected to a driving gear (13), the driving gear (13) corresponds to the long racks (14) one by one and is meshed with each other, a protruding unit and a stretching unit are connected to the rotating shaft (12), and the protruding unit and the stretching unit are staggered.

3. The agricultural rotary tiller adapted to different types of cultivated land according to claim 2, characterized in that: A plurality of sliding cylinders (11) are slidably connected to the straight rod (10), a plurality of connecting rods (111) are arrayed on the sliding cylinder (11), and the connecting rods (111) are fixedly connected to the inner wall of the rotary tillage shaft (1).

4. The agricultural rotary tiller adapted to different types of cultivated land according to claim 2, characterized in that: The extending unit includes a shifting rod (19), a plurality of shifting rods (19) are centrally symmetrically connected to the rotating shaft (12), a plurality of crushing grooves (20) are provided on both sides of the rotary tiller (4), the plurality of crushing grooves (20) are connected to the movable groove (41), a crushing knife (21) is movably connected in the crushing groove (20), and the crushing knife (21) is located on the motion trajectory of the shifting rod (19), so that the shifting rod (19) can push the crushing knife (21) out of the crushing groove (20).

5. The agricultural rotary tiller adapted to different types of cultivated land as claimed in claim 4, characterized in that: A locking groove (22) is provided on the surface of the crushing blade (21), and a movable groove is provided on the inner walls on both sides of the rotary tillage blade (4). A push rod (23) and a locking rod (24) are provided in the movable groove, and one end of the push rod (23) and the locking rod (24) are in contact with each other, and the other end of the locking rod (24) is engaged with the locking groove (22).

6. The agricultural rotary tiller adapted to different types of cultivated land according to claim 5, characterized in that: A second spring (25) is provided on both sides of the push rod (23), one end of the second spring (25) is fixedly connected to the rotary tiller (4), and a tension spring (26) is fixedly connected between the locking rod (24) and the movable groove to facilitate the reset of the crushing knife (21) after use.

7. The agricultural rotary tiller adapted to different types of cultivated land according to claim 2, characterized in that: The extension unit comprises an arc-shaped rack (15), a plurality of arc-shaped racks (15) are symmetrically connected to the rotating shaft (12), the arc-shaped racks (15) and the shifting rod (19) are staggered, a plurality of accommodating grooves (171) are provided on both sides of the rotary tiller (4), the plurality of accommodating grooves (171) are connected to the movable groove (41), a widening plate (17) is movably connected in the accommodating groove (171), a plurality of gear telescopic structures (16) are centrally symmetrically connected in the movable groove (41), one end of the gear telescopic structure (16) is rotatably connected to the widening plate (17), and the other end of the gear telescopic structure (16) is meshed with the arc-shaped rack (15), and the gear telescopic structure (16) facilitates the widening plate (17) to be extended to increase the contact area between the rotary tiller (4) and the soil.

8. The agricultural rotary tiller adapted to different types of cultivated land according to claim 7, characterized in that: The gear telescopic structure (16) includes a support rod (166) fixedly connected to the movable groove (41), one end of the support rod (166) is rotatably connected to a first gear (161), the first gear (161) corresponds to the arc-shaped rack (15) one-to-one and is located on the motion trajectory of the arc-shaped rack (15), the first gear (161) is fixedly connected to a second gear (162) through a connecting rod (164), the second gear (162) is meshedly connected to a third gear (163), the second gear (162) and the third gear (163) are connected via a connecting plate, one side of the third gear (163) is fixedly connected to a rotating rod (165), and the rotating rod (165) is rotatably connected to the widening plate (17).

9. The agricultural rotary tiller adapted to different types of cultivated land according to claim 7, characterized in that: A first spring (18) is fixedly connected between the widening plate (17) and the movable groove (41), and the first spring (18) facilitates the resetting of the widening plate (17).

10. The agricultural rotary tiller adapted to different types of cultivated land according to claim 3, characterized in that: The rotating mechanism comprises a large gear (6) fixedly connected to the output end of the dual-motion motor (5); a plurality of small gears (9) are arrayed in the rotary tillage shaft (1); the plurality of small gears (9) are all meshed with the large gear (6); a worm (7) is fixedly connected to the small gear (9); both ends of the worm (7) are rotationally connected to the rotary tillage shaft (1); the connecting rod (111) and the worm (7) are staggered; one end of the rotary tillage blade (4) is fixedly connected to a worm wheel (8); the worm wheel (8) is meshed with the worm wheel (7).

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