A knife shaft anti-winding device for rotary tiller

Abstract

The utility model relates to the technical field of anti-winding of rotary tillers, and discloses an anti-winding device for a knife shaft of a rotary tiller, comprising a chassis, a gear box fixedly installed on the top of the chassis, a transmission shaft rotatably installed on the gear box, two symmetrically distributed support plates 1 fixedly installed on the top of the chassis, front and rear ends of the transmission shaft respectively rotate and penetrate the two support plates 1, first pulleys are fixedly installed on the front and rear ends of the transmission shaft, and a hollow knife shaft is rotatably installed in the chassis. The utility model has the following advantages and effects: it can control the reciprocating movement of the cutting knife to cut back and forth the crop roots and stems wound on the hollow knife shaft, improve the cutting effect of the crop roots and stems and the anti-winding ability of the hollow knife shaft, and can also control the rotary cutter to move back and forth according to actual conditions, first cut the crop roots and stems in the forward direction, reduce the probability of the crop roots and stems winding on the hollow knife shaft, and further improve the anti-winding ability.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-winding of rotary tillers, in particular to an anti-winding device for a knife shaft of a rotary tiller. Background Art

[0002] A rotary tiller is a tilling machine that is used in conjunction with a tractor to complete ploughing and harrowing operations. It has been widely used because of its strong soil crushing ability and flat surface after ploughing. At the same time, it can cut up the root stubble buried below the surface, which is convenient for the seed drill to operate and provide a good seed bed for later sowing. During the use of existing rotary tillers, the rotary tiller blade drives the blade to rotate to cultivate the land. Since there are various weeds and crop roots in the land, some weeds and crop roots will become more and more tightly entangled on the blade as the blade rotates. The weeds and crop roots will become more and more tightly after being entangled, making it difficult to remove them.

[0003] In the prior art, a Chinese patent with a publication number of CN220586756U discloses an anti-winding device for a knife shaft of a rotary tiller, comprising a frame, side plates fixedly mounted at both ends of the frame, a gear box fixedly mounted at the axis of the frame, a hollow knife shaft arranged between the lower output end of the gear box and the side plate, a plurality of blades fixedly mounted on the outer wall of the hollow knife shaft, and an anti-winding component arranged on the hollow knife shaft. Although the device can spread out the entangled crop roots and stems, it still needs to be removed manually, which is inconvenient to directly cut off the crop roots and stems, and the cleaning effect is not good.

[0004] Therefore, it is necessary to design a knife shaft anti-winding device for a rotary tiller that can automatically cut off the entangled crop roots without manual cleaning. Utility Model Content

[0005] The utility model aims to provide a knife shaft anti-winding device for a rotary tiller, which has the effect of automatically cutting off the wound crop roots without manual cleaning.

[0006] The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a knife shaft anti-winding device for a rotary tiller, comprising a chassis, a gear box fixedly installed on the top of the chassis, a transmission shaft rotatably installed on the gear box, two symmetrically distributed support plates 1 fixedly installed on the top of the chassis, front and rear ends of the transmission shaft respectively rotate and penetrate the two support plates 1, front and rear ends of the transmission shaft are fixedly installed with first pulleys, a hollow knife shaft is rotatably installed in the chassis, the front and rear sides of the hollow knife shaft extend outside the chassis and are fixedly installed with second pulleys, a transmission belt is wound around the two first pulleys and the corresponding second pulleys, a plurality of evenly distributed blades are fixedly installed on the hollow knife shaft, an anti-winding mechanism for cleaning crop roots and stems is provided on the hollow knife shaft, and a rotary cutting mechanism for cutting crop roots and stems is provided on the chassis.

[0007] By adopting the above technical solution, the crop roots and stems in the forward direction can be cut first, reducing the probability of the crop roots and stems being entangled on the hollow knife shaft, and then the crop roots and stems that have been entangled on the hollow knife shaft can be cut off to improve the anti-entanglement ability.

[0008] The utility model is further configured as follows: the anti-winding mechanism includes two horizontal plates, two support plates II, a first screw, a first motor, a moving block and a cutting knife, the two horizontal plates are fixedly mounted on the front and rear sides of the chassis respectively, the two support plates II are fixedly mounted on the tops of the two horizontal plates respectively, the first screw is rotatably mounted on the two support plates II and is located in the hollow knife shaft, the first motor is fixedly mounted on the front support plate II, the output shaft end of the first motor is fixedly connected to the front end of the first screw, the moving block is threadedly mounted on the first screw, the cutting knife is fixedly mounted on the moving block, a strip groove is provided on the hollow knife shaft, and the cutting knife is slidably mounted in the strip groove.

[0009] By adopting the above technical solution, the roots and stems of crops wound around the hollow knife shaft can be cut conveniently.

[0010] The utility model is further configured as follows: limiting grooves are provided on the top inner wall and the bottom inner wall of the hollow knife shaft, limiting blocks are fixedly installed on the top and the bottom of the moving block, and the two limiting blocks are respectively slidably installed in the two limiting grooves.

[0011] By adopting the above technical solution, the movement of the moving block can be guided and constrained.

[0012] The utility model is further configured as follows: the cutting knife is an isosceles obtuse triangle structure, and the two short sides of the cutting knife are the blades.

[0013] By adopting the above technical solution, the cutting knife can cut the entangled crop roots and stems during the reciprocating motion.

[0014] The utility model is further configured as follows: the peeling mechanism includes a front and rear adjustment component, a lifting component, a mounting block, a protective box, a second motor, a connecting shaft and a plurality of peeling knives, the front and rear adjustment component is arranged on the top of the chassis, the lifting component is arranged on the front and rear adjustment component, the mounting block is arranged on the lifting component, the protective box is fixedly mounted on the bottom of the mounting block, the second motor is fixedly mounted in the protective box, the connecting shaft is fixedly mounted on the output shaft end of the second motor and is located outside the protective box, and the plurality of peeling knives are fixedly mounted on the bottom end of the connecting shaft and are evenly distributed.

[0015] By adopting the above technical solution, the roots and stems of crops on the forward route can be cut off, reducing the probability of the roots and stems of crops being entangled on the hollow knife shaft.

[0016] The utility model is further configured as follows: the front and rear adjustment components include two positioning plates, a second screw, a third motor, a movable plate and a slide seat, the two positioning plates are fixedly mounted on the top of the chassis, the second screw is rotatably mounted on the two positioning plates, the third motor is fixedly mounted on the top of the chassis, the output shaft end of the third motor is fixedly connected to the front end of the second screw, the movable plate is threadedly mounted on the second screw, the slide seat is fixedly mounted on the top of the chassis and is located on the left side of the two positioning plates, and the movable plate is slidably mounted on the top of the slide seat.

[0017] By adopting the above technical solution, the rotary cutter can be controlled to move forward and backward according to actual conditions, thereby expanding the range of cutting crop roots and stems.

[0018] The utility model is further configured as follows: a guide groove is provided on the top of the slide seat, a guide block is slidably installed in the guide groove, and the top of the guide block is fixedly connected to the movable plate.

[0019] By adopting the above technical solution, the movement of the movable plate can be guided and limited, thereby improving the stability of the movement of the movable plate.

[0020] The utility model is further configured as follows: the lifting assembly includes a moving box, a lifting rod, a rack, a driving motor and a gear; the moving box is fixedly mounted at the bottom of the moving plate and is located on the left side of the chassis; through holes are provided at the top and bottom of the moving box; the lifting rod is slidably mounted in the two through holes; the rack is fixedly mounted on the right side of the lifting rod; the driving motor is fixedly mounted on the bottom inner wall of the moving box; the gear is fixedly mounted on the output shaft end of the driving motor and meshes with the rack.

[0021] By adopting the above technical solution, the rotary cutter can be controlled to rise according to actual conditions to avoid cutting hard objects and damaging the rotary cutter.

[0022] The utility model is further configured as follows: a limit plate is fixedly installed on the top of the lifting rod.

[0023] By adopting the above technical solution, the moving range of the lifting rod can be limited.

[0024] The utility model is further configured as follows: a heat dissipation hole and an inspection window are provided on the protection box.

[0025] By adopting the above technical solution, the second motor can be easily repaired.

[0026] The beneficial effects of the utility model are:

[0027] 1. The utility model utilizes an anti-winding mechanism composed of two horizontal plates, two supporting plates, a first screw, a first motor, a moving block and a cutting knife, which can control the cutting knife to move back and forth, cut the crop roots and stems wound around the hollow knife shaft back and forth, and improve the cutting effect of the crop roots and stems and the anti-winding ability of the hollow knife shaft.

[0028] 2. The utility model uses a front-rear adjustment assembly composed of two positioning plates, a second screw, a third motor, a moving plate and a slide seat to control the forward and backward movement of the rotary cutter according to actual conditions, thereby expanding the range of cutting crop roots and stems and reducing the probability of crop roots and stems being entangled on the hollow cutter shaft.

[0029] 3. The utility model uses a lifting assembly composed of a moving box, a lifting rod, a rack, a driving motor and a gear, and can control the rise of the rotary cutter according to actual conditions to avoid damaging the rotary cutter by cutting hard objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic diagram of the three-dimensional structure of this embodiment. Figure 1 .

[0032] Figure 2 It is a schematic diagram of the main cross-sectional structure of this embodiment.

[0033] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of part A.

[0034] Figure 4 This is a schematic diagram of the three-dimensional structure of this embodiment. Figure 2 .

[0035] Figure 5 It is a schematic diagram of the three-dimensional structure of the hollow knife shaft.

[0036] Figure 6 It is a schematic diagram of the main structure of the cutting knife.

[0037] In the figure, 1, chassis; 2, gear box; 3, transmission shaft; 4, support plate 1; 5, first pulley; 6, hollow knife shaft; 7, second pulley; 8, transmission belt; 9, blade; 10, cross plate; 11, support plate 2; 12, first screw; 13, first motor; 14, moving block; 15, cutting knife; 16, strip groove; 17, limit groove; 18, limit block; 19, mounting block; 20, protection box; 21, second motor; 22, connecting shaft; 23, rotary cutter; 24, positioning plate; 25, second screw; 26, third motor; 27, moving plate; 28, slide; 29, guide groove; 30, guide block; 31, moving box; 32, through hole; 33, lifting rod; 34, rack; 35, drive motor; 36, gear; 37, limit plate. DETAILED DESCRIPTION

[0038] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The utility model provides a knife shaft anti-winding device for a rotary tiller, including a chassis 1, a gear box 2 is fixedly installed on the top of the chassis 1, it should be noted that the transmission shaft 3 rotates and passes through the gear box 2, a section of the transmission shaft 3 is located in the gear box 2 and is fixedly sleeved with a first bevel gear, the right side of the gear box 2 is rotatably installed with a transmission connecting rod connected to the tractor rotation, one end of the transmission connecting rod located in the gear box 2 is fixedly sleeved with a first bevel gear, the first bevel gear is meshed with the second bevel gear, and then the power transmission of the tractor is used to control the transmission shaft 3 to rotate. Since the gear box 2 is a prior art in the field, it will not be described in detail in this article. A transmission shaft 3 is rotatably installed on the gear box 2, and two gears are fixedly installed on the top of the chassis 1. A support plate 4 is symmetrically distributed, and the front and rear ends of the transmission shaft 3 rotate and penetrate the two support plates 4 respectively. The front and rear ends of the transmission shaft 3 are fixedly installed with a first pulley 5, and a hollow knife shaft 6 is rotatably installed in the chassis 1. The front and rear sides of the hollow knife shaft 6 extend to the outside of the chassis 1 and are fixedly installed with a second pulley 7. A transmission belt 8 is wound around the two first pulleys 5 and the corresponding second pulley 7. A plurality of evenly distributed blades 9 are fixedly installed on the hollow knife shaft 6. An anti-winding mechanism for cleaning crop roots and stems is provided on the hollow knife shaft 6. A rotary cutting mechanism for cutting crop roots and stems is provided on the chassis 1. Through the above-mentioned arrangement, the hollow knife shaft 6 and the plurality of blades 9 can be driven to rotate to turn the soil.

[0040] Specifically, the peeling mechanism includes a front-and-rear adjustment component, a lifting component, a mounting block 19, a protection box 20, a second motor 21, a connecting shaft 22 and a plurality of peeling knives 23. The front-and-rear adjustment component is arranged on the top of the chassis 1, the lifting component is arranged on the front-and-rear adjustment component, the mounting block 19 is arranged on the lifting component, the protection box 20 is fixedly mounted on the bottom of the mounting block 19, a heat dissipation hole and an inspection window are opened on the protection box 20, the second motor 21 is fixedly mounted in the protection box 20, the connecting shaft 22 is fixedly mounted on the output shaft end of the second motor 21 and is located at the protection box 20. Outside the protective box 20, multiple rotary cutters 23 are fixedly mounted on the bottom end of the connecting shaft 22 and are evenly distributed. The front and rear adjustment components include two positioning plates 24, a second screw 25, a third motor 26, a moving plate 27 and a slide 28. The two positioning plates 24 are fixedly mounted on the top of the chassis 1, and the second screw 25 is rotatably mounted on the two positioning plates 24. The third motor 26 is fixedly mounted on the top of the chassis 1. It should be noted that the third motor 26 is a forward and reverse motor. The output shaft end of the third motor 26 is fixedly connected to the front end of the second screw 25. The moving plate 27 and the slide 28 are fixedly mounted on the second screw 25. The movable plate 27 is threadedly mounted on the second screw rod 25, the slide 28 is fixedly mounted on the top of the chassis 1 and is located on the left side of the two positioning plates 24, the movable plate 27 is slidably mounted on the top of the slide 28, a guide groove 29 is provided on the top of the slide 28, a guide block 30 is slidably mounted in the guide groove 29, the top of the guide block 30 is fixedly connected to the movable plate 27, the lifting assembly includes a moving box 31, a lifting rod 33, a rack 34, a driving motor 35 and a gear 36, the moving box 31 is fixedly mounted on the bottom of the movable plate 27 and is located on the left side of the chassis 1, and the movable plate 27 is slidably mounted on the top of the slide 28. Through holes 32 are provided at the top and bottom of the moving box 31, and the lifting rod 33 is slidably installed in the two through holes 32. A limit plate 37 is fixedly installed on the top of the lifting rod 33, and a rack 34 is fixedly installed on the right side of the lifting rod 33. The driving motor 35 is fixedly installed on the bottom inner wall of the moving box 31. It should be noted that the driving motor 35 is a forward and reverse motor, and the gear 36 is fixedly installed on the output shaft end of the driving motor 35 and meshes with the rack 34. By utilizing the meshing rotation of the gear 36 and the rack 34, the lifting rod 33 can be controlled to move up and down.

[0041] Specifically, the anti-winding mechanism includes two transverse plates 10, two supporting plates 11, a first screw 12, a first motor 13, a moving block 14 and a cutting knife 15. The two transverse plates 10 are respectively fixedly mounted on the front and rear sides of the chassis 1, and the two supporting plates 11 are respectively fixedly mounted on the tops of the two transverse plates 10. The first screw 12 is rotatably mounted on the two supporting plates 11 and is located in the hollow knife shaft 6. The first motor 13 is fixedly mounted on the front supporting plate 11. It should be noted that the first motor 13 is a forward and reverse motor, and when the first motor 13 is powered off, the rotor of the first motor 13 can rotate freely without affecting the first screw 12, the moving block 14 and the cutting knife 15 to rotate with the hollow knife shaft 6. The output of the first motor 13 The output shaft end is fixedly connected to the front end of the first screw rod 12, the moving block 14 is threadedly installed on the first screw rod 12, and the cutting knife 15 is fixedly installed on the moving block 14. The cutting knife 15 is an isosceles obtuse triangle structure, and the two short sides of the cutting knife 15 are blades. A strip groove 16 is provided on the hollow knife shaft 6, and the cutting knife 15 is slidably installed in the strip groove 16. The top inner wall and the bottom inner wall of the hollow knife shaft 6 are provided with limiting grooves 17. The top and bottom of the moving block 14 are fixedly installed with limiting blocks 18, and the two limiting blocks 18 are respectively slidably installed in the two limiting grooves 17. Through the above arrangement, the cutting knife 15 can be controlled to reciprocate back and forth, and the crop roots and stems wrapped around the hollow knife shaft 6 can be cut back and forth, thereby improving the anti-winding ability.

[0042] In this example, it should be noted that a controller is provided in the cab of the tractor on which the rotary tiller is installed, and a plurality of control buttons are provided on the controller. The controller, the first motor 13, the second motor 21, the third motor 26, and the drive motor 35 are electrically connected to the power supply, and the first motor 13, the second motor 21, the third motor 26, and the drive motor 35 can be turned on and off respectively through the plurality of control buttons.

[0043] Through the above structure, the utility model provides a knife shaft anti-winding device for a rotary tiller, which can control the cutting knife 15 to reciprocate back and forth, cut the crop roots and stems wound on the hollow knife shaft 6 back and forth, improve the cutting effect of the crop roots and stems and the anti-winding ability of the hollow knife shaft 6, and can also control the rotary cutter 23 to move back and forth according to actual conditions, first cut the crop roots and stems in the forward direction, reduce the probability of the crop roots and stems being wound on the hollow knife shaft 6, and further improve the anti-winding ability. When used specifically, the transmission of the power of the tractor is controlled to The driving connecting rod rotates, and the transmission shaft 3 is controlled to rotate by utilizing the meshing rotation of the first bevel gear and the second bevel gear. The hollow cutter shaft 6 can be controlled to rotate by utilizing the joint action of the two first pulleys 5, the two second pulleys 7 and the two transmission belts 8, so as to turn the soil. In the process of turning the soil, when a large number of crop roots are found to be entangled on the hollow cutter shaft 6, the power transmission to the gear box 2 is interrupted, and the first motor 13 is controlled to rotate forward. The first motor 13 drives the first screw 12 to rotate, so as to control the movement. The block 14 and the cutting knife 15 slide forward to cut the crop roots and stems wound on the hollow knife shaft 6. When the cutting knife 15 moves forward and hits the front inner wall of the strip groove 16, the first motor 13 is controlled to reverse, and the cutting knife 15 is controlled to move rightward to cut the crop roots and stems again, thereby improving the cutting effect on the crop roots and stems and improving the anti-winding ability of the hollow knife shaft 6. When there are obviously more crop roots and stems in the advancing direction, the second motor 21 is controlled to run, and the second motor 21 drives the connecting shaft 22 and the rotary cutter 23 to rotate, so as to cut off the crop roots and stems in advance. , and according to actual conditions, the third motor 26 is controlled to rotate forward, and the third motor 26 drives the second screw 25 to rotate, thereby controlling the movable plate 27 and the movable box 31 to move backward to cut off the crop roots on the rear side, which can greatly reduce the probability of the crop roots entangled with the hollow knife shaft 6. When hard objects appear on the front approach path, the drive motor 35 can be controlled to rotate forward, and the drive motor 35 drives the gear 36 to rotate. By utilizing the meshing rotation of the gear 36 and the rack 34, the rotary cutter 23 is controlled to move upward to avoid hard objects and extend the service life of the rotary cutter.

[0044] The above is a detailed introduction to the anti-winding device for the blade shaft of a rotary tiller provided by the utility model. This article uses specific embodiments to explain the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A knife shaft anti-winding device for a rotary tiller, characterized in that: The invention comprises a chassis (1), a gear box (2) is fixedly mounted on the top of the chassis (1), a transmission shaft (3) is rotatably mounted on the gear box (2), two symmetrically distributed support plates (4) are fixedly mounted on the top of the chassis (1), the front and rear ends of the transmission shaft (3) respectively rotate and penetrate the two support plates (4), the front and rear ends of the transmission shaft (3) are fixedly mounted with first pulleys (5), a hollow blade shaft (6) is rotatably mounted in the chassis (1), the front and rear sides of the hollow blade shaft (6) both extend outside the chassis (1) and are fixedly mounted with second pulleys (7), a transmission belt (8) is wound around the two first pulleys (5) and the corresponding second pulleys (7), a plurality of uniformly distributed blades (9) are fixedly mounted on the hollow blade shaft (6), an anti-winding mechanism for cleaning crop roots and stems is arranged on the hollow blade shaft (6), and a rotary cutting mechanism for cutting crop roots and stems is arranged on the chassis (1).

2. The anti-winding device for a rotary tiller blade shaft according to claim 1, characterized in that: The anti-winding mechanism comprises two transverse plates (10), two supporting plates (11), a first screw (12), a first motor (13), a moving block (14) and a cutting knife (15); the two transverse plates (10) are respectively fixedly mounted on the front and rear sides of the chassis (1); the two supporting plates (11) are respectively fixedly mounted on the tops of the two transverse plates (10); the first screw (12) is rotatably mounted on the two supporting plates (11) and is located in a hollow knife shaft (6); the first motor (13) is fixedly mounted on the front supporting plate (11); the output shaft end of the first motor (13) is fixedly connected to the front end of the first screw (12); the moving block (14) is threadedly mounted on the first screw (12); the cutting knife (15) is fixedly mounted on the moving block (14); a strip groove (16) is provided on the hollow knife shaft (6); and the cutting knife (15) is slidably mounted in the strip groove (16).

3. The anti-winding device for a rotary tiller blade shaft according to claim 2, characterized in that: Limiting grooves (17) are provided on the top inner wall and the bottom inner wall of the hollow blade shaft (6), and limiting blocks (18) are fixedly installed on the top and the bottom of the movable block (14), and the two limiting blocks (18) are slidably installed in the two limiting grooves (17) respectively.

4. The anti-winding device for a rotary tiller blade shaft according to claim 2, characterized in that: The cutting knife (15) is of an isosceles obtuse triangle structure, and the two short sides of the cutting knife (15) are blades.

5. The anti-winding device for a rotary tiller blade shaft according to claim 1, characterized in that: The rotary cutting mechanism comprises a front-to-back adjustment component, a lifting component, a mounting block (19), a protection box (20), a second motor (21), a connecting shaft (22) and a plurality of rotary cutting knives (23); the front-to-back adjustment component is arranged on the top of the chassis (1); the lifting component is arranged on the front-to-back adjustment component; the mounting block (19) is arranged on the lifting component; the protection box (20) is fixedly mounted on the bottom of the mounting block (19); the second motor (21) is fixedly mounted in the protection box (20); the connecting shaft (22) is fixedly mounted on the output shaft end of the second motor (21) and is located outside the protection box (20); and the plurality of rotary cutting knives (23) are fixedly mounted on the bottom end of the connecting shaft (22) and are evenly distributed.

6. The anti-winding device for a rotary tiller blade shaft according to claim 5, characterized in that: The front-rear adjustment assembly comprises two positioning plates (24), a second screw rod (25), a third motor (26), a movable plate (27) and a slide seat (28), wherein the two positioning plates (24) are fixedly mounted on the top of the chassis (1), the second screw rod (25) is rotatably mounted on the two positioning plates (24), the third motor (26) is fixedly mounted on the top of the chassis (1), the output shaft end of the third motor (26) is fixedly connected to the front end of the second screw rod (25), the movable plate (27) is threadedly mounted on the second screw rod (25), the slide seat (28) is fixedly mounted on the top of the chassis (1) and is located on the left side of the two positioning plates (24), and the movable plate (27) is slidably mounted on the top of the slide seat (28).

7. The anti-winding device for a rotary tiller blade shaft according to claim 6, characterized in that: A guide groove (29) is provided at the top of the slide seat (28), a guide block (30) is slidably installed in the guide groove (29), and the top of the guide block (30) is fixedly connected to the movable plate (27).

8. The anti-winding device for a rotary tiller blade shaft according to claim 7, characterized in that: The lifting assembly comprises a moving box (31), a lifting rod (33), a rack (34), a driving motor (35) and a gear (36); the moving box (31) is fixedly mounted at the bottom of the moving plate (27) and is located on the left side of the chassis (1); through holes (32) are provided at the top and bottom of the moving box (31); the lifting rod (33) is slidably mounted in the two through holes (32); the rack (34) is fixedly mounted on the right side of the lifting rod (33); the driving motor (35) is fixedly mounted on the inner wall of the bottom of the moving box (31); and the gear (36) is fixedly mounted on the output shaft end of the driving motor (35) and meshes with the rack (34).

9. The anti-winding device for a rotary tiller blade shaft according to claim 8, characterized in that: A limiting plate (37) is fixedly mounted on the top of the lifting rod (33).

10. The anti-winding device for a rotary tiller blade shaft according to claim 5, characterized in that: The protection box (20) is provided with heat dissipation holes and an inspection window.

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