Viscosity-reducing resistance-reducing rotary tillage coulter

Abstract

The invention discloses a rotary tillage coulter capable of reducing viscosity and resistance, and belongs to the technical field of agricultural machinery. Comprising a cutter shaft, a plurality of cutter sleeves are rotationally installed on the cutter shaft, cutters are installed in the cutter sleeves, and the installation directions of every two adjacent cutters in the circumferential direction of the cutter shaft are opposite; the moving assembly comprises a double-thread lead screw rotationally connected with the cutter shaft and a plurality of top plates sliding in the cutter shaft, two sets of adjusting plates are arranged on the double-thread lead screw in a threaded fit mode, the two top plates on the opposite sides are installed on the same adjusting plate, a plurality of connecting pipes are rotationally installed on the top plates, and the adjusting rods of the cutter sleeves are sleeved with the connecting pipes. The adjusting plate can be driven by rotating the double-thread lead screw to drive the top plate to move in the reverse direction or the same direction, then the cutter sleeve and the cutter are made to rotate around the axis of the sleeve through cooperation of the connecting pipe and the adjusting rod, and accurate adjustment of the cut-in angle is achieved; different rotary tillage requirements can be met, and the operation flexibility is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural machinery technology, in particular to a rotary tillage plow blade with reduced viscosity and resistance. BACKGROUND

[0002] The rotary tillage plow blade is a core component of agricultural machinery, widely used in farmland soil tillage operation, and its performance directly affects the rotary tillage efficiency, soil breaking quality and energy cost. With the development of agricultural modernization, higher requirements are put forward for the adaptability, maintenance convenience and viscosity reduction and resistance reduction performance of the rotary tillage plow blade.

[0003] The existing rotary tillage plow blade has a fixed design of the cutting angle (the angle between the blade plane and the forward direction of the rotary tiller), which cannot be dynamically adjusted according to the real-time working conditions such as soil humidity and viscosity. In dry and low-viscosity soil, a fixed small cutting angle leads to insufficient plowing depth and insufficient soil breaking; and in wet and high-viscosity soil, a fixed large cutting angle increases the contact area between the blade and the soil, aggravates soil adhesion and increases cutting resistance, resulting in reduced operation efficiency and even blocked tools. In view of this, a rotary tillage plow blade with reduced viscosity and resistance is proposed. SUMMARY

[0004] The purpose of the present application is to provide a rotary tillage plow blade with reduced viscosity and resistance, which solves the problem of soil adhesion and poor rotary tillage effect caused by the inability to adjust the cutting angle in the prior art.

[0005] The embodiment of the present application provides a rotary tillage plow blade with reduced viscosity and resistance, which comprises a blade shaft, a plurality of blade sleeves are rotatably installed on the blade shaft, a cutting blade is installed in the blade sleeve, and the installation directions of two adjacent cutting blades along the circumference of the blade shaft are opposite. A moving assembly comprises a double-thread screw rod rotatably connected with the blade shaft, and a plurality of top plates sliding in the blade shaft, two groups of adjusting plates are threadedly connected on the double-thread screw rod, two top plates on the opposite sides are installed on the same adjusting plate, a plurality of connecting pipes are rotatably installed on the top plate, and the connecting pipes are sleeved on the adjusting rods of the blade sleeves. The double-thread screw rod drives the movement of the connecting pipes, drives the adjusting rods in the same row to swing in the same direction, drives the adjusting rods in the adjacent rows to swing in opposite directions, and synchronously adjusts the cutting angle of the cutting blade in the bending direction.

[0006] As a further description of the above technical solution, a plurality of pull blocks are provided, a locking block is installed at the end of the pull block, and the pull block is clamped in the buckle groove of the cutting blade through the locking block; A plurality of blade seats are installed on the blade shaft, the pull block is matched with the blade groove on the blade seat, a limiting ball elastically installed on the blade seat is clamped on the pull block, and the pull block and the blade seat are limited.

[0007] As a further description of the above technical solution, the knife shaft is internally slidably mounted with a plurality of moving plates, the moving plates are mounted with a plurality of positioning blocks, the positioning blocks are adapted with the positioning grooves of the pull blocks, and the screw rods screwed on the knife shaft are rotationally connected with the moving plates.

[0008] As a further description of the above technical solution, the thickness of the lock block is equal to the groove depth of the buckle groove.

[0009] As a further description of the above technical solution, the width and height of the pull block are equal to the width and height of the cutter.

[0010] As a further description of the above technical solution, the knife seat comprises a base, and the length of the pull block is greater than the spacing between the base and the cutter sleeve.

[0011] As a further description of the above technical solution, the base is distributed along the axial direction of the knife shaft, the cutter grooves on the base are circumferentially distributed around the axis of the knife shaft, and the positions of the cutter grooves correspond to the positions of the cutter sleeves one by one.

[0012] As a further description of the above technical solution, the knife shaft comprises a plurality of guide blocks circumferentially distributed around the axis, and the top plate and the moving plate slide on the corresponding guide blocks.

[0013] As a further description of the above technical solution, the surface of the cutter is coated with a coating.

[0014] As a further description of the above technical solution, the limiting ball is connected with the base through an elastic member.

[0015] By adopting the above technical solution, when the cutter is installed, the pull block is buckled on the cutter through the lock block, the cutter and the pull block are adjusted to be parallel, the pull block is inserted into the cutter sleeve through the cutter sleeve, and the cutter is simultaneously inserted into the cutter sleeve under the driving of the pull block. When the pull block is inserted into the cutter groove, the limiting ball is extruded, the elastic member is compressed, and when the pull block is inserted into the cutter groove to the limiting position, the limiting ball corresponds to the limiting groove in position, the positioning groove corresponds to the guide groove in position, and the limiting ball is pushed into the limiting groove under the action of the elastic member, thereby preliminarily limiting the pull block and the cutter. After a plurality of pull blocks and cutters are inserted into the cutter grooves and the cutter sleeves, a tool is used to rotate and screw the screw rod to push the moving plate to move, so that a plurality of positioning blocks are simultaneously inserted into the positioning grooves from the guide grooves, a plurality of pull blocks in the same row are locked on the base, the cutter is fixed in the cutter sleeve under the limiting action of the lock block, and the above operation is repeated to lock and fix different rows of cutters. When the angle between the cutter blade plane and the forward direction of the rotary cultivator needs to be adjusted, the double-thread screw rod is rotated with a tool, the two adjusting plates are moved towards each other through threaded transmission, the two adjacent top plates are moved in opposite directions, the two top plates on the opposite sides are moved in the same direction, and the connecting pipe moves with the top plates; when the connecting pipe moves, the adjusting rod slides relative to the connecting pipe, and can drive the adjusting rod, the cutter sleeve and the cutter to rotate around the axis of the sleeve pipe; because the adjacent top plates move in opposite directions and the two top plates on the opposite sides move in the same direction, the adjusting rods in the same row swing in the same direction, the adjusting rods in adjacent rows swing in opposite directions, and then the rotary directions of the cutters in adjacent rows are opposite, and the end part of the cutter is bent in the direction, so that the cutting angle adjustment of the cutter is realized.

[0016] In summary, due to the adoption of the technical scheme, the application has the following beneficial effects: 1. The double-thread screw rod can drive the adjusting plates to move the top plates in opposite directions / same direction, and then through the cooperation of the connecting pipe and the adjusting rod, the cutter sleeve and the cutter rotate around the axis of the sleeve pipe, so that the cutting angle is accurately adjusted; the design that the adjacent cutters rotate in opposite directions and the cutters on the opposite sides rotate in the same direction can dynamically adjust according to the soil humidity and viscosity: the cutting angle is increased to increase the plowing depth in dry and low-viscosity soil, and the cutting angle is reduced to reduce the contact area in wet and high-viscosity soil, so that different rotary plowing requirements are met, and the operation flexibility is improved.

[0017] 2. The cutter and the pull block are buckled through the lock block, the elastic element drives the limiting ball to pop into the limiting groove to realize preliminary positioning after the pull block is inserted into the cutter groove; then the moving plate is driven by rotating the screw rod to make the positioning block synchronously inserted into the guide groove and the positioning groove, and the rapid locking of multiple groups of cutters is completed; compared with the traditional bolt fixing, the structure eliminates the step of screwing and unscrewing the bolts one by one, and the installation / removal of a row of cutters can be completed in a single process, so that the problem of low efficiency of the traditional fixing mode is solved, and the maintenance time is greatly shortened.

[0018] 3. The cutters adjacent in the circumferential direction of the sleeve are opposite in the installation direction, and when the moving assembly is adjusted, the adjacent cutters rotate in opposite directions, so that the soil is subjected to shear forces in alternating directions during rotary plowing, the problem of too large soil blocks or missed plowing caused by traditional one-way cutting is avoided, and the uniformity of soil crushing is significantly improved, thereby creating better conditions for subsequent seeding or fertilization. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The overall structure schematic diagram of the rotary plowing coulter disclosed by the preferred embodiment of the application is disclosed. Figure 2 The partial structure schematic diagram of the rotary plowing coulter disclosed by the preferred embodiment of the application is disclosed. Figure 3 The cutter installation schematic diagram of the rotary plowing coulter disclosed by the preferred embodiment of the application is disclosed. Figure 4The adjusting rod connecting structure of the viscosity-reducing and resistance-reducing rotary ploughing blade is disclosed in a preferred embodiment of the present application. Figure 5 The moving plate and top plate distribution of the viscosity-reducing and resistance-reducing rotary ploughing blade is disclosed in a preferred embodiment of the present application. Figure 6 The blade seat structure of the viscosity-reducing and resistance-reducing rotary ploughing blade is disclosed in a preferred embodiment of the present application. Figure 7 The blade seat structure of the viscosity-reducing and resistance-reducing rotary ploughing blade is disclosed in a preferred embodiment of the present application. Figure 8 The pulling block connecting structure of the viscosity-reducing and resistance-reducing rotary ploughing blade is disclosed in a preferred embodiment of the present application. Figure 9 The pulling block structure of the viscosity-reducing and resistance-reducing rotary ploughing blade is disclosed in a preferred embodiment of the present application. Figure 10 The positioning block plug-in limiting diagram of the viscosity-reducing and resistance-reducing rotary ploughing blade is disclosed in a preferred embodiment of the present application. Figure 11 The cutting blade cutting angle adjustment diagram of the viscosity-reducing and resistance-reducing rotary ploughing blade is disclosed in a preferred embodiment of the present application.

[0020] Label explanation in the figure: 1, blade shaft; 2, blade sleeve; 3, moving assembly; 4, blade seat; 5, cutting blade; 6, pulling block; 7, moving plate; 11, shaft sleeve; 12, fixed plate; 13, support column; 14, guide block; 15, sleeve; 21, connecting block; 22, adjusting rod; 31, double-threaded screw rod; 32, top plate; 33, adjusting plate; 34, connecting pipe; 41, base; 42, blade groove; 43, guide groove; 44, fixed pipe; 45, elastic member; 46, limiting ball; 47, stop block; 51, buckle groove; 52, groove; 61, lock block; 62, positioning groove; 63, limiting groove; 71, positioning block; 72, screw rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0022] REFERENCE Figures 1 to 11The embodiment discloses a rotary cultivator with reduced viscosity and resistance, which comprises a blade shaft 1 and a plurality of blade sleeves 2. The blade shaft 1 comprises a shaft sleeve 11, two ends of the shaft sleeve 11 are fixedly provided with fixed plates 12, the two fixed plates 12 are fixedly connected through a support column 13, the inner wall of the shaft sleeve 11 is fixedly provided with a plurality of guide blocks 14, the plurality of guide blocks 14 are circumferentially distributed around the axis of the shaft sleeve 11, a plurality of sleeve pipes 15 are fixedly arranged on the shaft sleeve 11, the axis of the sleeve pipe 15 intersects with the axis of the shaft sleeve 11, the sleeve pipe 15 is circumferentially distributed around the axis of the shaft sleeve 11, the blade sleeve 2 is in one-to-one correspondence with the sleeve pipe 15, and the blade sleeve 2 is rotationally connected with the sleeve pipe 15 through a connecting block 21. An adjusting rod 22 is fixedly arranged on the blade sleeve 2.

[0023] With reference to Figure 2 , Figure 4 and Figure 5 , a moving assembly 3 is arranged on the blade shaft 1. The moving assembly 3 comprises a double-thread screw rod 31 and a plurality of top plates 32 sliding on the guide blocks 14. One end of the double-thread screw rod 31 penetrates through the fixed plate 12 and is rotationally connected with the fixed plate 12. The other end of the double-thread screw rod 31 is rotationally connected with the shaft sleeve 11. Two groups of adjusting plates 33 are threadedly arranged on the double-thread screw rod 31. The adjusting plates 33 are sleeved on the support column 13. The two top plates 32 on the opposite sides are arranged on the same adjusting plate 33. A plurality of connecting pipes 34 are rotationally arranged on the top plate 32. The connecting pipes 34 are distributed along the axial direction of the shaft sleeve 11. The connecting pipes 34 are sleeved on the adjusting rod 22. When the double-thread screw rod 31 is rotated, the two adjusting plates 33 move towards or away from each other, thereby causing the two adjacent top plates 32 to move in opposite directions. The two top plates 32 on the opposite sides move in the same direction. The connecting pipes 34 move with the top plates 32. When the connecting pipes 34 move, the connecting pipes 34 slide relative to the adjusting rod 22 and can drive the adjusting rod 22 and the blade sleeve 2 to rotate around the axis of the sleeve pipe 15, thereby achieving the angle adjustment of the blade sleeve 2.

[0024] With reference to Figure 3 , Figure 6 and Figure 7 , a plurality of blade seats 4 are arranged on the support column 13 and are distributed along the axial direction. The blade seat 4 comprises a base 41 fixedly arranged on the support column 13. A plurality of blade grooves 42 are arranged on the base 41 and are circumferentially distributed around the axis of the support column 13. A plurality of guide grooves 43 are arranged on the base 41 and are in communication with the blade grooves 42. A plurality of fixed pipes 44 are fixedly arranged on the base 41 and are distributed on the two sides of the blade grooves 42 and are in communication with the blade grooves 42. The fixed pipes 44 are sleeved with elastic members 45. One end of the elastic member 45 is fixedly connected with the fixed pipe 44. The other end is fixedly arranged with a limiting ball 46. The diameter of the limiting ball 46 is smaller than the inner diameter of the fixed pipe 44. A stop block 47 is fixedly arranged on the limiting ball 46. An annular limiting step is arranged on the inner side of the port of the fixed pipe 44. The stop block 47 is matched with the step to limit the maximum extension of the limiting ball 46, thereby avoiding the complete insertion of the limiting ball 46 into the blade groove 42 to cause the jamming.

[0025] Referring to Figures 7 to 9 , the rotary tillage blade further comprises a plurality of cutters 5 and a plurality of pull blocks 6, the width and height of the pull block 6 are equal to the width and height of the cutter 5, the pull block 6 is inserted and matched with the blade groove 42, the cutter 5 is inserted and matched with the cutter sleeve 2, the cutter 5 is provided with a buckling groove 51, and the cutter 5 is provided with a recess 52 communicated with the buckling groove 51. The pull block 6 is fixedly installed with a locking block 61, the thickness of the locking block 61 is equal to the groove depth of the buckling groove 51, the locking block 61 is movably inserted in the buckling groove 51, and the locking block 61 is provided with a positioning groove 62 and a limiting groove 63. The locking block 61 is buckled on the cutter 5, the pull block 6 passes through the cutter sleeve 2 and drives the cutter 5 to be inserted into the cutter sleeve 2, the pull block 6 continues to move and is inserted into the blade groove 42, and the pull block 6 is moved to the limiting position at the bottom of the blade groove 42, at this time, the positioning groove 62 is aligned with the guide groove 43, and the limiting ball 46 is popped into the limiting groove 63 to be limited, so that the pull block 6 is stably kept on the base 41.

[0026] The installation directions of two cutters 5 adjacent to the circumference of the shaft sleeve 11 are opposite, that is, the inclined directions of the end portions of the cutters 5 are opposite, so that the rotary tillage effect is improved. The surface of the cutter 5 is coated with a multilayer nitride protective coating, such as a TiAlN / AlCrN nano coating, so as to improve the surface hardness and chemical stability of the cutter 5, reduce friction and heat damage, and achieve certain viscosity reduction and drag reduction effects.

[0027] Referring to Figure 2 and Figure 10 , the moving plate 7 is slidably installed on the guide block 14, the moving plate 7 is fixedly installed with a plurality of positioning blocks 71, the thickness of the positioning block 71 is equal to the groove width of the positioning groove 62, the end portion of the moving plate 7 is rotatably connected with a screw rod 72, and the screw rod 72 is threadedly matched with the fixed plate 12. The moving plate 7 is moved by screwing the screw rod 72, so that the plurality of positioning blocks 71 can be inserted into the guide groove 43 and the positioning groove 62, the plurality of pull blocks 6 in the same row are synchronously limited and locked on the corresponding base 41, the stability of the rotary tillage operation of the cutter 5 is ensured, the fixing efficiency of the cutter 5 is greatly improved by synchronously limiting the plurality of pull blocks 6, and the problem of low efficiency of the traditional bolt fixed cutter 5 is solved.

[0028] Working principle: when the cutter 5 is installed, the pull block 6 is buckled on the cutter 5 through the locking block 61, the cutter 5 and the pull block 6 are adjusted to be parallel, the pull block 6 passes through the cutter sleeve 2 and is inserted into the blade groove 42, the cutter 5 is synchronously inserted into the cutter sleeve 2 under the driving of the pull block 6, the pull block 6 is pressed when being inserted into the blade groove 42, the elastic member 45 is compressed, the limiting ball 46 and the limiting groove 63 are in position correspondence when the pull block 6 is inserted into the blade groove 42 to the limiting position, the positioning groove 62 and the guide groove 43 are in position correspondence, the limiting ball 46 is topped into the limiting groove 63 under the action of the elastic member 45, and the pull block 6 and the cutter 5 are preliminarily limited.

[0029] After the plurality of pulling blocks 6 and the cutting knives 5 are inserted into the knife grooves 42 and the knife sleeves 2, the tool is used to screw the screw rods 72, so that the moving plate 7 is moved, and the plurality of positioning blocks 71 are simultaneously inserted into the positioning grooves 62 from the guide grooves 43, so that the plurality of pulling blocks 6 in the same row are locked on the base 41, and the cutting knives 5 are fixed in the knife sleeves 2 under the limiting action of the locking blocks 61. The above operation is repeated to lock and fix the cutting knives 5 in different rows.

[0030] When it is necessary to adjust the included angle between the cutting edge plane of the cutting knife 5 and the advancing direction of the rotary tiller to adapt to different rotary tillage requirements, the double-threaded screw rod 31 is screwed by using the tool, the two adjusting plates 33 are moved towards each other through threaded transmission, the two adjacent top plates 32 are moved in opposite directions, the two top plates 32 on the opposite sides are moved in the same direction, and the connecting pipe 34 moves with the top plates 32. When the connecting pipe 34 moves, the connecting pipe 34 slides relative to the adjusting rod 22, and can drive the adjusting rod 22, the knife sleeve 2 and the cutting knife 5 to rotate around the axis of the sleeve pipe 15. Since the movement directions of the adjacent top plates 32 are opposite, the movement directions of the two top plates 32 on the opposite sides are the same, the adjusting rods 22 in the same row swing in the same direction, the adjusting rods 22 in adjacent rows swing in opposite directions, and then the rotary directions of the cutting knives 5 in adjacent rows are opposite, and the cutting knives 5 are rotated towards the bending direction of the end of the cutting knife 5, so that the cutting angle adjustment of the cutting knife 5 is realized.

[0031] It should be noted that the length of the pulling block 6 is greater than the distance between the base 41 and the knife sleeve 2, when the front end of the pulling block 6 is inserted into the knife groove 42, the tail end of the pulling block 6 can be in the knife sleeve 2, so as to reduce the difficulty of inserting the pulling block 6 and the knife groove 42. When the pulling block 6 and the cutting knife 5 are fixed, the pulling block 6 has completely left the knife sleeve 2, and the cutting knife 5 is not inserted into the knife groove 42, the locking block 61 is coaxial with the connecting block 21, when the cutting knife 5 and the knife sleeve 2 rotate, the pulling block 6 can remain in a stationary state, the cutting knife 5 rotates relative to the locking block 61, and the rotary interference is avoided. When the pulling block 6 and the cutting knife 5 are installed, the two adjusting plates 33 need to keep the maximum distance, at this time, the insertion port of the knife sleeve 2 is aligned with the port of the knife groove 42.

[0032] When the rotary tillage soil is relatively dry and has low viscosity, the cutting angle of the cutting knife 5 can be increased to improve the rotary tillage effect; when the rotary tillage soil is relatively wet and has high viscosity, the cutting angle of the cutting knife 5 can be reduced, so that the contact area between the cutting knife 5 and the soil is reduced, and the component of the cutting force along the normal direction of the cutting knife 5 is reduced, so as to reduce the adhesion resistance of the soil to the blade.

[0033] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A rotary tiller blade with reduced stickiness and drag, characterized in that: Includes a cutter shaft (1), on which a plurality of cutter sleeves (2) are rotatably mounted, and cutters (5) are installed inside the cutter sleeves (2), with two adjacent cutters (5) installed in opposite directions along the circumference of the cutter shaft (1); The moving component (3) includes a double-threaded screw (31) rotatably connected to the cutter shaft (1) and several top plates (32) sliding inside the cutter shaft (1). Two sets of adjusting plates (33) are threadedly fitted on the double-threaded screw (31). The two top plates (32) on opposite sides are mounted on the same adjusting plate (33). Several connecting pipes (34) are rotatably mounted on the top plate (32). The connecting pipes (34) are sleeved on the adjusting rod (22) of the cutter sleeve (2). The double threaded screw (31) drives the connecting pipe (34) to move, causing the adjusting rod (22) in the same row to swing in the same direction, and the adjusting rod (22) in adjacent rows to swing in opposite directions, so that the cutter (5) can adjust the cutting angle synchronously along the bending direction.

2. The anti-sticking and drag-reducing rotary tiller blade according to claim 1, characterized in that: It also includes several pull blocks (6), the ends of which are fitted with locking blocks (61), and the pull blocks (6) are engaged in the slots (51) of the cutter (5) by the locking blocks (61); The cutter shaft (1) is equipped with several cutter holders (4), the pull block (6) is adapted to the cutter groove (42) on the cutter holder (4), and the limiting ball (46) elastically installed on the cutter holder (4) is engaged with the pull block (6) to limit the pull block (6) and the cutter holder (4).

3. The anti-sticking and drag-reducing rotary tiller blade according to claim 2, characterized in that: A number of movable plates (7) are slidably installed inside the cutter shaft (1). A number of positioning blocks (71) are installed on the movable plates (7). The positioning blocks (71) are adapted to the positioning grooves (62) of the pull block (6). The screw (72) screwed on the cutter shaft (1) is rotatably connected to the movable plates (7).

4. The anti-sticking and drag-reducing rotary tiller blade according to claim 2, characterized in that: The thickness of the locking block (61) is equal to the depth of the groove (51).

5. The anti-sticking and drag-reducing rotary tiller blade according to claim 2, characterized in that: The width and height of the pull block (6) are equal to the width and height of the cutter (5).

6. The anti-sticking and drag-reducing rotary tiller blade according to claim 2, characterized in that: The blade holder (4) includes a base (41), and the length of the pull block (6) is greater than the distance between the base (41) and the blade sleeve (2).

7. The anti-sticking and drag-reducing rotary tiller blade according to claim 6, characterized in that: The base (41) is arranged in an array along the axial direction of the cutter shaft (1), and the cutter grooves (42) on the base (41) are arranged in a circular array around the axis of the cutter shaft (1), and the positions of the cutter grooves (42) correspond one-to-one with the positions of the cutter sleeves (2).

8. The anti-sticking and drag-reducing rotary tiller blade according to any one of claims 1-7, characterized in that: The cutter shaft (1) includes a plurality of guide blocks (14) arranged in a circular array around the axis, and the top plate (32) and the moving plate (7) slide on the corresponding guide blocks (14).

9. The anti-sticking and drag-reducing rotary tiller blade according to any one of claims 1-7, characterized in that: The surface of the cutter (5) is coated with a coating.

10. The anti-sticking and drag-reducing rotary tiller blade according to claim 6, characterized in that: The limiting ball (46) is connected to the base (41) through the elastic element (45).

Images