Novel split-flow type combined land preparation machine

Abstract

The invention discloses a novel split-flow type combined land preparation machine, which belongs to the technical field of agricultural machinery and comprises a traction frame, a folding frame is hinged to the rear end of the traction frame, a telescopic mechanism is arranged between the traction frame and the folding frame, one end of the telescopic mechanism is hinged to the traction frame, and the other end of the telescopic mechanism is fixed on the folding frame. The telescopic mechanism is used for adjusting the angle between the traction frame and the folding frame, a corrugated rake set is arranged at the front end of the folding frame, liftable walking wheels are arranged in the middle of the folding frame, and a movable press wheel set and a height-adjustable soil leveling patter are sequentially arranged at the rear end of the folding frame. The device is simple and compact in structure, economical and practical, soil blocks can be effectively crushed by adopting the corrugated harrow blades, and soil is driven to reduce operation resistance for subsequent soil leveling; the limiting height of the press wheel can be adjusted through the movable connecting plate, so that self-adaptive adjustment of the press compactness is achieved, soil hilling is not likely to happen, the soil unloading effect is good, and operation power consumption is low.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a novel split-flow combined land preparation machine. Background Art

[0002] In the process of mechanized tillage and land preparation, different agricultural machinery and implements are required to perform multiple operations to meet all agronomic requirements for tillage and land preparation before sowing. Multiple field mechanical operations cause soil compaction, and multiple factors lead to a shallow tillage layer, compacted soil, and damaged pores. The soil is more susceptible to erosion by water, wind, and gravity, leading to soil loss and erosion, reducing soil fertility and production capacity. In order to reduce the damage to soil texture, bulk density, moisture content, compactness, porosity, etc. caused by excessive tillage, the development of combined land preparation machines can meet the requirements of the flatness of the land after plowing according to the soil type, soil moisture, and land preparation time, and the hardness of the soil.

[0003] Traditional combined land preparation machines are prone to mounding and poor in soil unloading, which leads to increased power consumption during operation and technical problems such as uneven land during operation and failure to meet sowing requirements. Therefore, how to develop a combined land preparation machine with a compact overall structure, not prone to mounding, good soil unloading effect, and a loose seed bed state is a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a novel split-flow combined land preparation machine to solve the deficiencies in the prior art.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is:

[0006] A novel split-flow combined land leveling machine comprises: a traction frame, a folding frame is hingedly connected to the rear end of the traction frame, a telescopic mechanism is arranged between the traction frame and the folding frame, one end of the telescopic mechanism is hingedly connected to the traction frame, and the other end is fixed to the folding frame, the telescopic mechanism is used to adjust the angle between the traction frame and the folding frame, a corrugated harrow group is arranged at the front end of the folding frame, a liftable walking wheel is arranged in the middle of the folding frame, and a movable pressing wheel group and an adjustable leveling trowel are arranged in sequence at the rear end of the folding frame.

[0007] Preferably, the folding frame includes: a middle frame, the left and right sides of the middle frame are hinged with diversion frames, the two diversion frames are mirror images of each other, a folding cylinder is arranged between the middle frame and the diversion frame, and the two ends of the folding cylinder are respectively hinged to the middle frame and the diversion frame.

[0008] Preferably, the diversion frame comprises: an outer beam, a plurality of middle cross beams are fixed on the inner side of the outer beam, the front end and the rear end of the outer beam are both provided with outer beam hanging ears and cylinder hanging ears, the outer beam hanging ears are used to be hinged with the middle frame, and the cylinder hanging ears are used to be hinged with one end of the folding cylinder, front side plates are symmetrically arranged on both sides of the front end of the outer beam, rear side plates are symmetrically arranged on both sides of the rear end of the outer beam, and an intermediate plate is fixed at the midpoint between the two rear side plates at the rear end of the outer beam, and an inverted eight-shaped leveling plate and an eight-shaped diversion leveling plate are welded in sequence from front to back below the middle cross beam, and the angle between the sandy soil leveling plate and the diversion leveling plate and the longitudinal beam is 40° to 45°, and the angle between the loam soil leveling plate and the diversion leveling plate and the longitudinal beam is 45° to 50°.

[0009] Preferably, the bottom ends of the converging and leveling plates and the dividing and leveling plates are both connected with wear plates.

[0010] Preferably, the suppressing wheel group includes four suppressing mechanisms with the same structure, and the suppressing mechanisms are movably arranged between the rear side plate and the middle plate. The suppressing mechanisms include: two movable connecting plates, and the facing ends of the two movable connecting plates are provided with bearing assemblies, and a suppressing roller shaft is arranged between the two bearing assemblies, and a plurality of suppressing wheels are sleeved on the suppressing roller shaft.

[0011] Preferably, the two movable connecting plates are respectively installed on the rear side plate and the middle plate, and a first center hole and a first arc-shaped slot are opened on the movable connecting plate, and a pin shaft and a limit pin are respectively passed through the first center hole and the first arc-shaped slot, so that the movable connecting plate can move along the first arc-shaped slot with the first center hole as the center, so as to realize contour following, and an axial limit plate is also installed between the pin shaft and the limit pin.

[0012] Preferably, a plurality of grooves are provided at the rear end of the movable connecting plate, a plurality of limiting holes are correspondingly provided on the rear side plate and the middle plate, and detachable limiting bolts are provided in the limiting holes.

[0013] Preferably, the soil leveling plate comprises: a plurality of mounting brackets, the mounting brackets being mounted on the rear side plate and the middle plate, the mounting brackets being provided with a second center hole and a second arc-shaped slot, the second center hole and the second arc-shaped slot being respectively penetrated by a pin shaft and a locking bolt, so that the mounting bracket can rotate along the second arc-shaped slot with the second center hole as the center so as to adjust the height of the soil leveling plate, the end portions of the mounting brackets are bolted to a triangular plate, and the soil leveling plate is welded to the bottom end of the triangular plate.

[0014] Preferably, a travel wheel cylinder is fixedly provided at the middle front end of the middle frame, a transmission shaft is rotatably provided at the middle rear end of the middle frame, a connecting rod is hinged at the output end of the travel wheel cylinder, the other end of the connecting rod is fixed on the transmission shaft, a rotating rod is fixed at the end of the transmission shaft, and a travel wheel is rotatably provided at the other end of the rotating rod.

[0015] Preferably, the corrugated harrow group includes: a mounting beam, which is fixed to the front end of the diversion frame by bolts, and a plurality of soil crushing mechanisms are arranged below the mounting beam, and the soil crushing mechanisms include: a connecting bracket, a fixed shaft is arranged at the bottom of the connecting bracket, a corrugated harrow blade is rotatably arranged on one side of the fixed shaft, and a bearing is sleeved on the other side, a bearing seat is sleeved on the outside of the bearing, the bearing seat is connected to the corrugated harrow blade by bolts, and a bearing end cover is fixed to the end of the bearing seat away from the connecting bracket.

[0016] The novel split-flow combined land preparation machine provided by the present invention has the following advantages compared with the prior art:

[0017] The invention has a simple and compact structure, is economical and practical, and adopts a corrugated harrow blade to effectively break up soil clods and drive the soil to reduce the operation resistance for subsequent soil leveling; a movable connecting plate is adopted to adjust the limit height of the pressing wheel, thereby realizing adaptive adjustment of the compaction compaction degree, and is not easy to pile up soil, has a good soil unloading effect, and has low operation power consumption;

[0018] The present invention is suitable for land preparation operations for seedbed preparation. After land preparation, the soil is finely broken, the surface is flat, there are no wheel tracks, the soil unloading effect is good, the soil compaction compaction degree is adjustable, and efficient land leveling can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 is an axonometric view of the present invention;

[0021] Figure 2 A top view of the present invention;

[0022] Figure 3 It is an axonometric view of the diversion frame of the present invention;

[0023] Figure 4 A bottom view of the diversion frame of the present invention;

[0024] Figure 5It is a schematic diagram of the matching relationship between the poly-leveling soil plate and the wear plate of the present invention;

[0025] Figure 6 It is an axonometric view of the frame in the present invention;

[0026] Figure 7 It is a structural schematic diagram of the suppression mechanism of the present invention;

[0027] Figure 8 It is an axonometric diagram of the suppression mechanism of the present invention;

[0028] Fig. 9 It is a structural schematic diagram of the movable connecting plate of the present invention;

[0029] Fig.10 This is a schematic diagram of the structure of the soil leveling screed of the present invention;

[0030] Fig.11 It is a structural schematic diagram of the travel wheel of the present invention;

[0031] Fig.12 An exploded view of the soil crushing mechanism of the present invention;

[0032] Fig.13 It is a side view of the soil crushing mechanism of the present invention.

[0033] In the figure: 1-traction frame, 2-telescopic mechanism, 3-corrugated harrow group, 4-travel wheel, 5-pressing wheel group, 6-soil leveling plate, 7-middle frame, 8-diverter frame, 9-folding cylinder, 10-outer beam, 11-middle cross beam, 12-outer beam hanging ear, 13-cylinder hanging ear, 14-front side plate, 15-rear side plate, 16-middle plate, 17-leveling soil plate, 18-diverter leveling soil plate, 19-wear plate, 20-mounting beam, 21-connecting bracket, 22-fixed shaft , 23-corrugated harrow blade, 24-bearing, 25-bearing seat, 26-bearing end cover, 27-travel wheel cylinder, 28-transmission shaft, 29-connecting rod, 30-rotating rod, 31-movable connecting plate, 32-bearing assembly, 33-pressing roller shaft, 34-pressing wheel, 35-first center hole, 36-first arc-shaped notch, 37-axial limit plate, 38-mounting frame, 39-second center hole, 40-second arc-shaped notch, 41-triangular plate, 42-soil smearing plate. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0035] refer to Figure 1-2As shown, the present invention provides a new type of split-flow combined land leveling machine, characterized in that it includes: a traction frame 1, the rear end of the traction frame 1 is hinged with a folding frame, a telescopic mechanism 2 is arranged between the traction frame 1 and the folding frame, one end of the telescopic mechanism 2 is hinged on the traction frame 1, and the other end is fixed on the folding frame, the telescopic mechanism 2 is used to adjust the angle between the traction frame 1 and the folding frame, the front end of the folding frame is provided with a corrugated harrow group 3, the middle part of the folding frame is provided with a liftable walking wheel 4, and the rear end of the folding frame is provided with a movable pressing wheel group 5 and an adjustable leveling trowel 6 in sequence. Preferably, the telescopic mechanism 2 adopts an adjusting screw, which can play a role in locking the traction angle, making the operation process more stable.

[0036] As a preferred embodiment, the folding frame includes: a middle frame 7, a diverter frame 8 is hinged on both the left and right sides of the middle frame 7, the two diverter frames 8 are mirror images of each other, a folding cylinder 9 is arranged between the middle frame 7 and the diverter frame 8, and the two ends of the folding cylinder 9 are respectively hinged to the middle frame 7 and the diverter frame 8. The folding cylinder 9 is extended and retracted, thereby driving the diverter frames 8 on the left and right sides to be retracted and extended, so as to achieve the effect of folding and reducing the horizontal width during transportation.

[0037] refer to Figure 3-6 As shown, the diversion frame 8 includes: an outer beam 10, a plurality of middle cross beams 11 are fixed on the inner side of the outer beam 10, the front end and rear end of the outer beam 10 are provided with outer beam hanging ears 12 and cylinder hanging ears 13, the outer beam hanging ears 12 are used to be hinged with the middle frame 7, and the cylinder hanging ears 13 are used to be hinged with one end of the folding cylinder 9, front side plates 14 are symmetrically arranged on both sides of the front end of the outer beam 10, and rear side plates 15 are symmetrically arranged on both sides of the rear end of the outer beam 10, and an intermediate plate 16 is fixed at the midpoint between the two rear side plates 14 at the rear end of the outer beam 10, and a gathering leveling plate 17 and a diversion leveling plate 18 are welded in sequence from front to back below the middle cross beam 11. During operation, the diversion type combined land leveling machine gathers and diverts the surface soil by cooperating at a certain angle with the diversion frame 8's gathering and leveling plates 17 and 18, so that the surface soil is evenly distributed and the land is horizontally leveled. At the same time, the soil is leveled by its own weight to achieve efficient land leveling.

[0038] As a preferred embodiment, the bottom ends of the poly-leveling plate 17 and the diverting leveling plate 18 are connected with a wear plate 19. Wear plates 19 are installed under the poly-leveling plate 17 and the diverting leveling plate 18 to facilitate replacement of easily worn parts. Countersunk holes are provided on the wear plate 19, which are connected to the poly-leveling plate 18 and the diverting leveling plate 19 by countersunk bolts to ensure the flatness of the contact between the working parts and the seed bed.

[0039] refer to Figure 7-9As shown, the suppressing wheel group 5 includes four suppressing mechanisms with the same structure, and the suppressing mechanisms are movably arranged between the rear side plate 15 and the middle plate 16. The suppressing mechanisms include: two movable connecting plates 31, and the facing ends of the two movable connecting plates 31 are provided with bearing assemblies 32, and a suppressing roller shaft 33 is arranged between the two bearing assemblies 32, and a plurality of suppressing wheels 34 are sleeved on the suppressing roller shaft 33.

[0040] As a preferred embodiment, the two movable connecting plates 31 are respectively mounted on the rear side plate 15 and the middle plate 16, and the movable connecting plate 31 is provided with a first center hole 35 and a first arc-shaped notch 36, and the first center hole 35 and the first arc-shaped notch 36 are respectively penetrated with a pin shaft and a limit pin, so that the movable connecting plate 31 can move along the first arc-shaped notch 36 with the first center hole 35 as the center of the circle, and an axial limit plate 37 is also installed between the pin shaft and the limit pin. When working on the ground, the softness of different soils varies, and the position of the set suppression mechanism can be adjusted in a contour as the suppression sinking height changes, and the position is adjusted along the first arc-shaped notch 36 with the first center hole 35 as the center of the circle. The axial limit plate 37 is used to prevent the suppression mechanism from axial movement.

[0041] As a preferred embodiment, the rear end of the movable connecting plate 31 is provided with a plurality of grooves, and the rear side plate 15 and the middle plate 16 are provided with a plurality of limit holes correspondingly, and the limit holes are provided with detachable limit bolts. The grooves on the movable connecting plate 31 cooperate with the limit bolts provided on the rear side plate 15 and the middle plate 16 to achieve the maximum contouring height limit.

[0042] refer to Fig.10 As shown, the soil leveling smear plate 6 includes: a plurality of mounting frames 38, the mounting frames 38 are mounted on the rear side plate 15 and the middle plate 16, the mounting frames 38 are provided with a second center hole 39 and a second arc-shaped notch 40, the second center hole 39 and the second arc-shaped notch 40 are respectively penetrated with a pin shaft and a locking bolt, so that the mounting frame 38 can rotate along the second arc-shaped notch 40 with the second center hole 39 as the center and be locked and fixed, the end of the mounting frame 38 is bolted with a triangular plate 41, and the bottom end of the triangular plate 41 is welded with a soil leveling smear plate 42. The soil leveling smear plate 6 can level the finely crushed soil after being pressed by the pressing wheel 34. The soil leveling smear plate 42 can be adjusted in height with the soil leveling plate through the mounting frame 38, so as to adapt to different soil environments.

[0043] refer to Fig.11As shown, a travel wheel cylinder 27 is fixedly provided at the middle front end of the middle frame 7, a transmission shaft 28 is rotatably provided at the middle rear end of the middle frame 7, a connecting rod 29 is hinged at the output end of the travel wheel cylinder 27, the other end of the connecting rod 29 is fixed on the transmission shaft 28, a rotating rod 30 is fixed at the end of the transmission shaft 28, and a travel wheel 4 is rotatably provided at the other end of the rotating rod 30. The travel wheel cylinder 27 is extended and retracted, thereby driving the travel wheel 4 to rise and fall, so that the travel wheel 4 can be put down during transportation for easy transportation, and is stored above the leveling smear plate 6 during operation to avoid wheel rutting.

[0044] refer to Figure 12-13 As shown, the corrugated harrow group 3 includes: a mounting beam 20, which is fixed to the front end of the diversion frame 8 by bolts, and multiple groups of soil crushing mechanisms are arranged below the mounting beam 20, and the soil crushing mechanisms include: a connecting bracket 21, and a fixed shaft 22 is arranged at the bottom of the connecting bracket 21, and a corrugated harrow blade 23 is rotatably arranged on one side of the fixed shaft 22, and a bearing 24 is sleeved on the other side, and a bearing seat 25 is sleeved on the outside of the bearing 24, and the bearing seat 25 is connected to the corrugated harrow blade 23 by bolts, and a bearing end cover 26 is fixed to the end of the bearing seat 25 away from the connecting bracket 21. Each corrugated harrow blade 23 is assembled independently, has good anti-disturbance ability, and can be arranged at a certain angle to the left and right, and can achieve soil crushing as the machine moves forward, and loosen the soil to provide good working conditions for subsequent leveling operations.

[0045] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0046] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0047] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A new type of split-flow combined land preparation machine, characterized in that: include: A traction frame (1), the rear end of the traction frame (1) is hinged with a folding frame, a telescopic mechanism (2) is arranged between the traction frame (1) and the folding frame, one end of the telescopic mechanism (2) is hinged on the traction frame (1), and the other end is fixed on the folding frame, the telescopic mechanism (2) is used to adjust the angle between the traction frame (1) and the folding frame, a corrugated harrow group (3) is arranged at the front end of the folding frame, a liftable walking wheel (4) is arranged in the middle of the folding frame, and a movable pressing wheel group (5) and an adjustable leveling shovel (6) are arranged in sequence at the rear end of the folding frame.

2. A novel split-flow combined land preparation machine according to claim 1, characterized in that: The folding frame comprises: a middle frame (7), the left and right sides of the middle frame (7) are both hingedly connected with diversion frames (8), the two diversion frames (8) are mirror images of each other, a folding cylinder (9) is arranged between the middle frame (7) and the diversion frame (8), and the two ends of the folding cylinder (9) are respectively hingedly connected to the middle frame (7) and the diversion frame (8).

3. A novel split-flow combined land preparation machine according to claim 2, characterized in that: The diversion frame (8) comprises: an outer beam (10), a plurality of middle cross beams (11) are fixed on the inner side of the outer beam (10), the front end and the rear end of the outer beam (10) are both provided with an outer beam hanging ear (12) and a cylinder hanging ear (13), the outer beam hanging ear (12) is used for hinged connection with the middle frame (7), the cylinder hanging ear (13) is used for hinged connection with one end of the folding cylinder (9), the front end of the outer beam (10) is symmetrically provided with front side plates (14), the rear end of the outer beam (10) is symmetrically provided with A rear side plate (15), a middle plate (16) is fixed at the rear end of the outer beam (10) at the midpoint between the two rear side plates (14), and an inverted eight-shaped gathering and leveling plate (17) and an eight-shaped diversion and leveling plate (18) are welded in sequence from front to back below the middle cross beam (11), wherein the angle between the gathering and leveling plate (17) and the diversion and leveling plate (18) and the longitudinal beam for sandy soil is 40° to 45°, and the angle between the gathering and leveling plate (17) and the diversion and leveling plate (18) and the longitudinal beam for loamy soil is 45° to 50°.

4. A novel split-flow combined land preparation machine according to claim 3, characterized in that: The bottom ends of the gathering and leveling soil plate (17) and the dividing and leveling soil plate (18) are both connected with a wear plate (19).

5. The novel split-flow combined land preparation machine according to claim 3 is characterized in that: The suppressing wheel group (5) includes four suppressing mechanisms with the same structure, and the suppressing mechanisms are movably arranged between the rear side plate (15) and the middle plate (16). The suppressing mechanisms include: two movable connecting plates (31), and the facing ends of the two movable connecting plates (31) are each provided with a bearing assembly (32), and a suppressing roller shaft (33) is arranged between the two bearing assemblies (32), and a plurality of suppressing wheels (34) are sleeved on the suppressing roller shaft (33).

6. A novel split-flow combined land preparation machine according to claim 5, characterized in that: The two movable connecting plates (31) are respectively mounted on the rear side plate (15) and the middle plate (16); a first central hole (35) and a first arc-shaped slot (36) are provided on the movable connecting plate (31); a pin shaft and a limit pin are respectively inserted into the first central hole (35) and the first arc-shaped slot (36), so that the movable connecting plate (31) can move along the first arc-shaped slot (36) with the first central hole (35) as the center of the circle, thereby realizing contour tracking; an axial limit plate (37) is also installed between the pin shaft and the limit pin.

7. The novel split-flow combined land preparation machine according to claim 5 is characterized in that: The rear end of the movable connecting plate (31) is provided with a plurality of grooves, and the rear side plate (15) and the middle plate (16) are correspondingly provided with a plurality of limiting holes, and detachable limiting bolts are provided in the limiting holes.

8. The novel split-flow combined land preparation machine according to claim 3 is characterized in that: The soil leveling plate (6) comprises: a plurality of mounting frames (38), wherein the mounting frames (38) are mounted on the rear side plate (15) and the middle plate (16), wherein a second center hole (39) and a second arc-shaped notch (40) are formed on the mounting frames (38), wherein a pin shaft and a locking bolt are respectively inserted into the second center hole (39) and the second arc-shaped notch (40), so that the mounting frames (38) can rotate along the second arc-shaped notch (40) with the second center hole (39) as the center of the circle, thereby adjusting the height of the soil leveling plate (6), wherein the end of the mounting frames (38) is bolted to a triangular plate (41), and a soil leveling plate (42) is welded to the bottom end of the triangular plate (41).

9. The novel split-flow combined land preparation machine according to claim 2 is characterized in that: A travel wheel cylinder (27) is fixedly arranged at the front middle part of the middle frame (7), a transmission shaft (28) is rotatably arranged at the rear middle part of the middle frame (7), a connecting rod (29) is hingedly connected to the output end of the travel wheel cylinder (27), the other end of the connecting rod (29) is fixed to the transmission shaft (28), a rotating rod (30) is fixed to the end of the transmission shaft (28), and a travel wheel (4) is rotatably arranged at the other end of the rotating rod (30).

10. The novel split-flow combined land preparation machine according to claim 1, characterized in that: The corrugated harrow group (3) comprises: a mounting beam (20), the mounting beam (20) being fixed to the front end of the diversion frame (8) by bolts, a plurality of soil crushing mechanisms being arranged below the mounting beam (20), the soil crushing mechanisms comprising: a connecting bracket (21), a fixed shaft (22) being arranged at the bottom of the connecting bracket (21), a corrugated harrow blade (23) being rotatably arranged on one side of the fixed shaft (22), and a bearing (24) being sleeved on the other side, a bearing seat (25) being sleeved on the outside of the bearing (24), the bearing seat (25) being connected to the corrugated harrow blade (23) by bolts, and a bearing end cover (26) being fixed to one end of the bearing seat (25) away from the connecting bracket (21).

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