Spring type independent harrow blade seat and land preparation machine

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a spring type independent harrow blade seat and a soil preparation machine, the spring type independent harrow blade seat comprises a mounting seat, a rotating arm, a limiting plate, a tensioning rod and a first elastic reset piece, a fixed shaft is detachably and fixedly mounted on the inner side of the lower portion of the mounting seat, and the rotating arm is rotatably mounted on the outer side of the fixed shaft; a mounting through hole is formed in the left side of the lower part of the rotating arm corresponding to the rear position of the fixed shaft. The novel harrow disk is reasonable and compact in structure, when the novel harrow disk is used, the upper side of the mounting seat is fixedly mounted on the lower side of the rack, the harrow disk shaft is fixedly mounted in the mounting through hole, the harrow disk bearing seat is mounted on the outer side of the end part of the harrow disk shaft, and then the existing known harrow disk and the end surface, far away from the rotating arm, of the bearing seat are fixedly mounted together; when the traction equipment drives the machine frame to move forwards, the harrow blades rotate on the surface layer of soil, soil blocks on the surface layer of the soil can be cut up, the harrow turning and soil crushing effects can be achieved, the problems that the harrow blades are difficult to replace, the harrow blades are fragile, and large stones are clamped are solved, and the maintenance time and the operation cost are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, and relates to a spring-type independent harrow blade seat and a land preparation machine. Background Art

[0002] A harrow is an agricultural implement used to plow and loosen the soil to make it looser and more fertile for plant growth. Traditional harrows are used by installing multiple harrows on a central shaft, or by installing the harrows on a harrow seat, which is then installed on a frame. However, in actual use, the two harrow installation methods mentioned above are prone to trapping large rocks, making the harrows fragile. Installing multiple harrows on a central shaft makes it difficult to replace the harrows, resulting in long maintenance time and low operating efficiency. Summary of the Invention

[0003] The utility model provides a spring-type independent harrow blade seat and a soil leveling machine, which overcomes the deficiencies of the prior art and can effectively solve the problems of the prior harrow blades being easily clamped with large stones, being easily broken, and being difficult to replace.

[0004] One of the technical solutions of the present utility model is achieved through the following measures: a spring-type independent rake blade seat, including a mounting seat, a rotating arm, a limit plate, a tensioning rod and a first elastic reset member, a fixed shaft is detachably fixedly installed on the inner side of the lower part of the mounting seat, a rotating arm is rotatably installed on the outer side of the fixed shaft, a mounting through-hole is provided on the left side of the lower part of the rotating arm corresponding to the rear position of the fixed shaft, a spacing is provided between the projection of the center axis of the mounting through-hole on the horizontal plane and the projection of the center axis of the fixed shaft on the horizontal plane, a limit plate is fixedly installed on the inner side of the rear part of the mounting seat corresponding to the position above the fixed shaft, a through hole is provided on the front side of the limit plate, a tensioning rod is hingedly installed on the upper part of the rotating arm corresponding to the position above the fixed shaft, and the rear end passes through the through hole and is located behind the limit plate, and a first elastic reset member is installed between the rear end of the tensioning rod and the rear side of the limit plate.

[0005] The following is a further optimization and / or improvement of one of the above-mentioned utility model technical solutions:

[0006] The lower portion of the rotating arm can be bent toward the lower left to form a support portion, or the lower portion of the rotating arm can be bent toward the lower right to form a support portion, and the mounting through hole is provided at the lower portion of the support portion.

[0007] The rear side of the rotating arm corresponding to the rear position of the fixed shaft may have a limiting surface, and the upper portion of the limiting surface is inclined forward relative to the lower portion.

[0008] A pad can be mounted on the outside of the rear portion of the tension rod, and a loose nut is threaded on the outside of the tension rod at the rear portion of the pad. The first elastic reset member is mounted on the outside of the tension rod between the front portion of the pad and the rear portion of the limit plate.

[0009] The front end of the tension rod can be fixedly installed with a U-shaped connecting ear with an opening facing forward, the rear side of the connecting ear is in contact with the front side of the limit plate, and the upper part of the rotating arm is hingedly installed on the inner side of the front part of the connecting ear.

[0010] A hinge hole running through the left and right sides can be provided on the lower left side of the above-mentioned mounting seat, the fixed shaft is sleeved in the hinge hole, a disassembly plate is fixedly installed on the outer side of the left end of the fixed shaft, a positioning hole is provided on the left side of the upper part of the disassembly plate, a fixing screw hole is provided on the left side of the mounting seat corresponding to the position above the fixed shaft, and an anti-loosening bolt is provided in the positioning hole, which is screwed into the fixing screw hole on the right outer side.

[0011] A fixing hole that passes through the left and right sides can be provided on the upper left side of the above-mentioned rotating arm, and a fixing sleeve that is mounted on the outside of the fixed shaft is fixedly installed in the fixing hole. An oil filling hole that is connected inside and outside is provided on the outside of the fixing sleeve, and an oil filling nozzle is fixedly installed on the outside of the fixing sleeve corresponding to the position of the oil filling hole.

[0012] The upper side of the mounting seat may be provided with a plurality of vertically penetrating connection holes at intervals.

[0013] The second technical solution of the present invention is achieved through the following measures: a land preparation machine includes a frame, a left mounting frame, a right mounting frame, a spring-type independent rake blade seat, a rake blade and a transport wheel, a traction frame is hingedly installed on the front side of the frame, a left mounting frame is hingedly installed on the left side of the frame, a left driving mechanism that can make the left mounting frame swing up and down is installed on the upper left side of the frame, a first crossbeam and a second crossbeam are fixedly installed at intervals on the front and rear sides of the lower side of the left mounting frame, a right mounting frame is hingedly installed on the right side of the frame, and a mechanism that can make the right mounting frame swing up and down is installed on the upper right side of the frame The right driving mechanism of the mounting frame swings up and down, the third crossbeam and the fourth crossbeam are fixedly installed at intervals on the lower side of the right mounting frame, and a plurality of spring-type independent rake blade seats are fixedly installed at intervals on the lower sides of the first crossbeam, the second crossbeam, the third crossbeam and the fourth crossbeam, a rake blade shaft is fixedly installed in the mounting through hole of each spring-type independent rake blade seat, and a rake blade is rotatably installed on the outer side of each rake blade shaft, a first articulated frame is hingedly installed on the rear side of the frame, and a first soil crushing roller and a first soil pressing roller are installed at intervals on the lower side of the first articulated frame. At least one first pressing assembly is provided on the upper left and right sides of the rear portion of the vehicle frame, which enables the first soil crushing roller and the first soil pressing roller to compact the ground. A second articulated frame is hingedly installed on the rear side of the left mounting frame corresponding to the left position of the first articulated frame. A second soil crushing roller and a second soil pressing roller are installed at intervals on the front and rear side of the lower side of the second articulated frame. At least one second pressing assembly is provided on the upper left and right sides of the rear portion of the left mounting frame. A third articulated frame is hingedly installed on the rear side of the right mounting frame corresponding to the right position of the first articulated frame. A third articulated frame is installed at intervals on the front and rear side of the lower side of the third articulated frame. There are three soil-crushing rollers and a third soil-pressing roller, and at least one third clamping assembly is arranged at intervals on the left and right sides of the upper rear side of the right mounting frame. The second clamping assembly structure and the third clamping assembly structure are the same as the first clamping assembly structure. A suspension frame is fixedly installed on the lower rear side of the frame between the front of the first articulated frame and the rear of the second crossbeam, and an axle is rotatably installed on the lower side of the suspension frame. Transport wheels are installed on the left and right parts of the axle. A supporting cylinder is installed on the upper rear side of the frame, and the rear end of the piston rod of the supporting cylinder is hinged to the outer side of the upper part of the axle.

[0014] The following is a further optimization and / or improvement of the second technical solution of the above utility model:

[0015] The right portion of the first beam can be tilted backward relative to the left portion, and the right portion of the third beam can be tilted forward relative to the left portion. The lower portions of the rotating arms of the spring-type independent rake blade seats on the lower sides of the first beam and the fourth beam are bent downward to the right to form a support portion, and the lower portions of the rotating arms of the spring-type independent rake blade seats on the lower sides of the second beam and the third beam are bent downward to the left to form a support portion.

[0016] A V-shaped front scraper with its opening facing backward can be fixedly installed on the lower front side of the above-mentioned traction frame, a support arm is fixedly installed on the upper front side of the frame, an articulated sleeve is hingedly installed on the upper end of the support arm, a front adjustment rod is installed in the articulated sleeve, the front end of the front adjustment rod and the upper rear side of the traction frame are hingedly installed together, a second elastic reset part is installed between the rear part of the front adjustment rod and the rear part of the articulated sleeve, and a third elastic reset part is installed between the front part of the front adjustment rod and the front part of the articulated sleeve.

[0017] The above-mentioned first clamping assembly may include a fixed seat, a rear adjustment rod and a fourth elastic reset member. The fixed seat is fixedly installed on the upper side of the rear portion of the frame. The rear adjustment rod is hingedly installed between the upper part of the fixed seat and the upper side of the front portion of the first articulated frame. The fourth elastic reset member is installed between the upper side of the rear adjustment rod and the fixed seat.

[0018] The first soil pressing assembly can be installed at the rear of the above-mentioned first articulated frame, and the first soil pressing assembly includes a soil pressing plate, a soil pressing rod, a soil pressing rod and a fifth elastic reset member. A soil pressing plate is provided at the lower rear of the first articulated frame corresponding to the rear position of the first soil pressing roller, and a number of soil pressing rods are installed at intervals on the left and right between the upper side of the soil pressing plate and the lower side of the rear of the first articulated frame. The front of each soil pressing rod is inclined upward relative to the rear, and a soil pressing rod is hingedly installed between the upper side of the rear of the soil pressing rod and the rear side of the first articulated frame. A fifth elastic reset member is installed between the soil pressing rod and the first articulated frame, and the rear of the second articulated frame and the third articulated frame are both provided with a second soil pressing assembly with the same structure as the first soil pressing assembly.

[0019] The utility model has a reasonable and compact structure. When in use, the upper side of the mounting seat is fixedly mounted on the lower side of the frame, the rake blade shaft is fixedly mounted in the mounting through hole, the bearing seat is mounted on the outer side of the end of the rake blade shaft, and then the existing known rake blade and the end face of the bearing seat away from the rotating arm are fixedly mounted together. The rake blade can be a disc rake blade or a notched rake blade. The frame is connected to the traction equipment (tractor). When the traction equipment drives the frame forward, the rake blade rotates on the soil surface and can cut the soil blocks on the soil surface, which can play the role of raking and crushing the soil. When the rake blade encounters larger stones or larger soil blocks, there is a projection of the central axis of the mounting through hole on the horizontal plane between the projection of the central axis of the fixed shaft on the horizontal plane. The rake blades are arranged in a manner such that they can roll along the surface of larger stones or larger soil blocks, and the rake blades drive the rotating arm to swing, thereby preventing the rake blades from breaking when cutting stones. The first elastic reset member is provided, and after the rake blades roll over the surface of larger stones or larger soil blocks, the first elastic reset member acts on the rear of the tensioning rod, so that the tensioning rod pulls the upper part of the rotating arm. After the tensioning rod pulls the upper part of the rotating arm, the rake blades are reset and continue to cut the soil blocks on the surface of the soil. In this way, the rake blades can follow the shape of the soil surface when the random frame advances, and the soil crushing effect is better. It can also avoid the effect of stones or soil blocks being clamped between the rake blades, which solves the problems of difficulty in replacing rake blades, fragility of rake blades, and clamping of large stones, and effectively reduces maintenance time and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attachment Figure 1 This is a schematic diagram of the main structure of the second embodiment of the present invention in which the lower part of the rotating arm is bent to the lower left.

[0021] Attachment Figure 2 For attachment Figure 1 Schematic diagram of the right side cross-sectional structure.

[0022] Attachment Figure 3 For attachment Figure 1 Schematic diagram of the three-dimensional structure.

[0023] Attachment Figure 4 This is a schematic diagram of the main structure of the second embodiment of the present invention in which the lower part of the rotating arm is bent to the lower right.

[0024] Attachment Figure 5 For attachment Figure 4 Schematic diagram of the left-side sectional structure.

[0025] Attachment Figure 6 For attachment Figure 4 Schematic diagram of the three-dimensional structure.

[0026] Attachment Figure 7 This is a schematic diagram of the main structure of Example 9 of the present utility model.

[0027] Attachment Figure 8 This is a left-side structural schematic diagram of the ninth embodiment of the present utility model.

[0028] Attachment Figure 9 This is a right side structural diagram of the ninth embodiment of the present invention.

[0029] Attachment Figure 10 This is a schematic diagram of the top structure of Example 9 of the present utility model.

[0030] Attachment Figure 11 This is a schematic diagram of the three-dimensional structure of Example 9 of the present utility model.

[0031] The codes in the accompanying drawings are: 1 for the mounting seat, 2 for the rotating arm, 3 for the limiting plate, 4 for the tensioning rod, 5 for the first elastic reset member, 6 for the fixed shaft, 7 for the bearing seat, 8 for the supporting portion, 9 for the limiting surface, 10 for the pad, 11 for the loosening nut, 12 for the connecting ear, 13 for the disassembly plate, 14 for the anti-loosening bolt, 15 for the fixing sleeve, 16 for the oiling nozzle, 17 for the connecting hole, 18 for the frame, 19 for the traction frame, 20 for the left mounting frame, 21 for the left driving mechanism, 22 for the first crossbeam, 23 for the second crossbeam, 24 for the right mounting frame, 25 for the right driving mechanism, 26 for the third crossbeam, 27 for the fourth crossbeam, 28 for the rake blade, 29 for the rake blade shaft, 30 for the first articulated frame, 31 for the second articulated frame, 32 for the third articulated frame, 33 for the first crushing frame Roller, 34 is the second soil-breaking roller, 35 is the third soil-breaking roller, 36 is the first soil-pressing roller, 37 is the second soil-pressing roller, 38 is the third soil-pressing roller, 39 is the second compacting assembly, 40 is the third compacting assembly, 41 is the suspension frame, 42 is the axle, 43 is the transport wheel, 44 is the supporting cylinder, 45 is the front scraper, 46 is the supporting arm, 47 is the articulated sleeve, 48 is the front adjusting rod, 49 is the second elastic return member, 50 is the third elastic return member, 51 is the fixed seat, 52 is the rear adjusting rod, 53 is the fourth elastic return member, 54 is the soil-pressing plate, 55 is the soil-pressing rod, 56 is the soil-pressing pull rod, 57 is the fifth elastic return member, 58 is the second soil-pressing assembly, 59 is the leveling plate, 60 is the leveling pull rod, 61 is the sixth elastic return member, and 62 is the second leveling assembly. DETAILED DESCRIPTION

[0032] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0033] In this utility model, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 The layout is described in detail, such as the positional relationships of front, back, top, bottom, left, and right are based on the Figure 1 The layout direction is determined by the

[0034] The present invention will be further described below in conjunction with the embodiments and accompanying drawings:

[0035] Example 1: As shown in the attached Figures 1 to 6As shown, the spring-type independent rake blade seat includes a mounting seat 1, a rotating arm 2, a limit plate 3, a tensioning rod 4 and a first elastic reset member 5. A fixed shaft 6 is detachably fixedly installed on the inner side of the lower part of the mounting seat 1, and a rotating arm 2 is rotatably installed on the outer side of the fixed shaft 6. A mounting through-hole is provided on the left side of the lower part of the rotating arm 2 corresponding to the rear position of the fixed shaft 6. A spacing is provided between the projection of the center axis of the mounting through-hole on the horizontal plane and the projection of the center axis of the fixed shaft 6 on the horizontal plane. A limit plate 3 is fixedly installed on the inner side of the rear of the mounting seat 1 corresponding to the position above the fixed shaft 6, and a through hole is provided on the front side of the limit plate 3. A tensioning rod 4 is hingedly installed on the upper part of the rotating arm 2 corresponding to the position above the fixed shaft 6, and the rear end passes through the through hole and is located behind the limit plate 3. A first elastic reset member 5 is installed between the rear part of the tensioning rod 4 and the rear side of the limit plate 3.

[0036] According to the requirements, the projection of the central axis of the mounting hole on the horizontal plane is located behind the projection of the central axis of the fixed shaft 6 on the horizontal plane. The distance between the projection of the central axis of the mounting hole on the horizontal plane and the projection of the central axis of the fixed shaft 6 on the horizontal plane can be 20 mm. The mounting hole can be circular, and an arc-shaped limit block with an opening downward is fixed on the upper inner wall of the mounting hole. A rake shaft 29 with a limited plane processed on the outer side is installed in the mounting hole. In this way, the rake shaft 29 is installed in the mounting hole to prevent the rake shaft 29 from rotating. The first elastic reset member 5 is an existing well-known technology, such as a compression spring. When in use, the upper side of the mounting base 1 is fixedly mounted on the lower side of the frame, the rake blade shaft 29 is fixedly mounted in the mounting through hole, the existing known rake blade bearing seat 7 is installed on the outer side of the end of the rake blade shaft 29, and then the existing known rake blade 28 is fixedly mounted together with the end face of the bearing seat 7 away from the rotating arm 2. The rake blade 28 can be a disc rake blade or a notched rake blade. The frame is connected to a traction device (such as a tractor). When the traction device drives the frame forward, the rake blade 28 rotates on the surface of the soil, which can cut the soil blocks on the surface of the soil, and can play the role of raking and crushing the soil. When the rake blade 28 encounters larger stones or larger soil blocks, there is a spacing between the projection of the central axis of the mounting through hole on the horizontal plane and the projection of the central axis of the fixed shaft 6 on the horizontal plane. The rake blades 28 can roll along the surface of larger stones or larger soil blocks, and the rake blades 28 drive the rotating arm 2 to swing, thereby preventing the rake blades 28 from breaking when cutting stones. The first elastic reset member 5 is set. After the rake blades 28 roll over the surface of larger stones or larger soil blocks, the first elastic reset member 5 acts on the rear part of the tensioning rod 4, so that the tensioning rod 4 pulls the upper part of the rotating arm 2. After the tensioning rod 4 pulls the upper part of the rotating arm 2, the rake blades 28 are reset and continue to cut the soil blocks on the surface of the soil. In this way, the rake blades 28 can follow the shape of the soil surface when the random frame advances, and the soil crushing effect is better. It can also avoid the effect of stones or soil blocks being clamped between the rake blades 28, solves the problems of difficulty in replacing the rake blades 28, the fragility of the rake blades 28, and the clamping of large stones, and effectively reduces maintenance time and operating costs.

[0037] The above-mentioned spring-type independent harrow blade seat can be further optimized and / or improved according to actual needs:

[0038] Example 2: As an optimization of the above example, as shown in the attached Figures 1 to 6 As shown, the lower portion of the rotating arm 2 is bent toward the lower left to form the support portion 8 , or the lower portion of the rotating arm 2 is bent toward the lower right to form the support portion 8 , and the mounting through hole is provided at the lower portion of the support portion 8 .

[0039] As required, two reserved holes are provided at intervals on the lower portion of the support portion 8. The lower portion of the rotating arm 2 is bent downward and rightward to form the support portion 8. The angle between the support portion 8 and the vertical plane is 5 to 12 degrees. In this way, after the rake blade shaft 29 is installed in the installation hole, the angle between the central axis of the rake blade shaft 29 and the horizontal plane is 5 to 12 degrees. In this embodiment, the angle between the support portion 8 and the vertical plane is 8 degrees, that is, the angle between the central axis of the rake blade shaft 29 and the horizontal plane is 8 degrees. The rake blade 28 is then rotated and installed at the right end of the rake blade shaft 29. In this way, the rake blade 28 can reduce resistance during rotation, allowing the rake blade 28 to better cut into the soil, making the process of entering and breaking the soil smoother, thereby reducing wear on the rake blade 28 and extending the service life of the rake blade 28.

[0040] Similarly, the lower portion of the rotating arm 2 is bent toward the lower left to form a support portion 8, and the angle between the support portion 8 and the vertical plane is 5 to 12 degrees. In this way, after the rake blade shaft 29 is installed in the mounting hole, the angle between the central axis of the rake blade shaft 29 and the horizontal plane is 5 to 12 degrees. In this embodiment, the angle between the support portion 8 and the vertical plane is 8 degrees, that is, the angle between the central axis of the rake blade shaft 29 and the horizontal plane is 8 degrees. Then, the rake blade 28 is rotated and installed at the left end of the rake blade shaft 29, and the lower portion of the rotating arm 2 is bent toward the lower left or lower right to form the support portion 8. In this way, the opening direction of the rake blade 28 can be adjusted according to demand.

[0041] Example 3: As an optimization of the above embodiment, as shown in the attached Figure 2 、 3 As shown in Figures 5 and 6, the rear side of the rotating arm 2 corresponding to the rear position of the fixed shaft 6 has a limiting surface 9, and the upper part of the limiting surface 9 is inclined forward relative to the lower part.

[0042] According to requirements, the angle between the limiting surface 9 and the lower side of the limiting plate 3 is 31 degrees. In this way, during use, when the rake blade 28 encounters a stone or hard object, the rake blade 28 will swing backward and upward. When the limiting surface 9 and the lower side of the limiting plate 3 come into contact with each other, the rotating arm 2 stops swinging. This can prevent the rake blade 28 and the rotating arm 2 from swinging too much, which may cause the connection between the tension rod 4 and the rotating arm 2 to break, thereby reducing the failure rate. On the other hand, it can prevent the rotating arm 2 from swinging too much and colliding with the first elastic return member 5.

[0043] Example 4: As an optimization of the above embodiment, as shown in the attached Figure 2 、 3 As shown in Figures 5 and 6, a pad 10 is mounted on the outer side of the rear portion of the tension rod 4, a loose nut 11 is screwed onto the outer side of the tension rod 4 at the rear side of the pad 10, and the first elastic reset member 5 is mounted on the outer side of the tension rod 4 between the front side of the pad 10 and the rear side of the limit plate 3.

[0044] According to the needs, an annular groove is provided on the outer side of the pad 10, and the rear end of the first elastic reset member 5 is installed in the annular groove, so that the pad 10 can support the first elastic reset member 5 to avoid wear between the first elastic reset member 5 and the tensioning rod 4. The setting of the pad 10 can also increase the contact area between the tightening nut 11 and the first elastic reset member 5. By setting the tightening nut 11, the compression amount of the first elastic reset member 5 can be adjusted to avoid the rake blade 28 from not being able to swing upward in time to avoid hard objects when encountering hard objects, causing the rake blade 28 to break.

[0045] Example 5: As an optimization of the above embodiment, as shown in the attached Figure 1 、 2 As shown in Figures 4 and 5, a U-shaped connecting ear 12 with an opening facing forward is fixedly installed at the front end of the tensioning rod 4. The rear side of the connecting ear 12 is in contact with the front side of the limiting plate 3, and the upper part of the rotating arm 2 is hingedly installed on the inner side of the front part of the connecting ear 12.

[0046] The setting of the connecting ear 12 not only facilitates the hinged installation of the tensioning rod 4 and the upper end of the rotating arm 2, but also plays a limiting role. The rear side of the connecting ear 12 is in contact with the front side of the limiting plate 3, which can avoid the rake blade 28 installed on the rake blade shaft 29 eccentrically arranged with the fixed shaft 6 from swinging backward and upward during use, affecting the soil crushing effect.

[0047] Example 6: As an optimization of the above embodiment, as shown in the attached Figure 1 、 3 As shown in Figures 4 and 6, when the lower part of the rotating arm 2 is bent to the lower right to form the supporting part 8, in order to facilitate the disassembly and assembly of the fixed shaft 6, a hinge hole is provided on the left side of the lower part of the mounting seat 1, which passes through the left and right sides. The fixed shaft 6 is inserted into the hinge hole, and a disassembly plate 13 is fixedly installed on the outer side of the left end of the fixed shaft 6. A positioning hole is provided on the left side of the upper part of the disassembly plate 13, and a fixing screw hole is provided on the left side of the mounting seat 1 corresponding to the position above the fixed shaft 6. The positioning hole is provided with an anti-loosening bolt 14 which is screwed into the fixing screw hole on the right side.

[0048] According to the needs, the fixing screw hole is provided on the mounting base 1 outside the fixed shaft 6, and the disassembly plate 13 and the loosening bolt can also be provided on the right side of the mounting base 1. The disassembly plate 13 and the fixed shaft 6 can be provided integrally. In use, this arrangement facilitates the disassembly and assembly of the fixed shaft 6, making the disassembly and assembly between the rotating arm 2 and the mounting base 1 more convenient and reducing the difficulty of maintenance.

[0049] When the lower part of the rotating arm 2 is bent to the lower left to form the support part 8, in order to facilitate the disassembly and assembly of the fixed shaft 6, a hinge hole is provided on the right side of the lower part of the mounting seat 1, which passes through the left and right sides. The fixed shaft 6 is inserted into the hinge hole, and a disassembly plate 13 is fixedly installed on the outer side of the right end of the fixed shaft 6. A positioning hole is provided on the left side of the upper part of the disassembly plate 13, and a fixing screw hole is provided on the right side of the mounting seat 1 corresponding to the position above the fixed shaft 6. The positioning hole is provided with a locking bolt 14 that is screwed into the fixing screw hole on the outer side of the left side.

[0050] Example 7: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown in Figure 6, a fixing hole is provided on the left side of the upper part of the rotating arm 2, which passes through the left and right sides. A fixing sleeve 15 is fixedly installed in the fixing hole and is mounted on the outside of the fixed shaft 6. An oil filling hole that communicates inside and outside is provided on the outside of the fixing sleeve 15. An oil filling nozzle 16 is fixedly installed on the outside of the fixing sleeve 15 corresponding to the position of the oil filling hole.

[0051] The grease nipple 16 is a conventionally known technology, and is provided as needed. During use, the fixed sleeve 15 prevents the tension rod 4 from bending and deforming due to the swinging arm 2 swinging left and right outside the fixed shaft 6. The grease nipple 16 facilitates the injection of lubricant into the annular space between the inside of the fixed sleeve 15 and the outside of the fixed shaft 6, thereby reducing wear between the fixed sleeve 15 and the fixed shaft 6 and extending the service life of the fixed shaft 6 and the fixed sleeve 15.

[0052] Example 8: As an optimization of the above embodiment, as shown in the attached Figures 1 to 6 As shown, a plurality of vertically penetrating connection holes 17 are provided at intervals on the upper side of the mounting base 1 .

[0053] According to the needs, three connecting holes 17 that pass through the upper and lower sides of the mounting base 1 are provided at intervals. The setting of the connecting holes 17 facilitates the disassembly and assembly between the mounting base 1 and the frame, and the spring-type independent rake blade seat and the frame can be quickly installed together. The material of the mounting base 1 can be NM450, the material of the fixed shaft 6 can be 42CrMo, the material of the rotating arm 2 can be BS700, and the material of the rake blade 28 can be wear-resistant boron steel. In order to facilitate the disassembly and assembly of the mounting base 1, a thread can be provided in the connecting hole 17, and the connecting hole 17 can also be a light hole. A nut is fixedly installed in the mounting base 1 corresponding to the position of the light hole.

[0054] Example 9: As shown in the attached Figures 1 to 11As shown, the land leveling machine includes a frame 18, a left mounting frame 20, a right mounting frame 24, a spring-type independent rake blade seat, a rake blade 28 and a transport wheel 43. A traction frame 19 is hingedly installed on the front side of the frame 18, a left mounting frame 20 is hingedly installed on the left side of the frame 18, a left drive mechanism 21 is installed on the upper left side of the frame 18 so as to enable the left mounting frame 20 to swing up and down, a first crossbeam 22 and a second crossbeam 23 are fixedly installed at intervals on the front and rear sides of the lower side of the left mounting frame 20, a right mounting frame 24 is hingedly installed on the right side of the frame 18, and a right drive mechanism is installed on the upper right side of the frame 18 so as to enable the right mounting frame 24 to swing up and down 25, the lower side of the right mounting frame 24 is fixedly installed with a third crossbeam 26 and a fourth crossbeam 27 at intervals in front and back. A plurality of spring-type independent rake blade seats are fixedly installed at intervals on the lower sides of the first crossbeam 22, the second crossbeam 23, the third crossbeam 26 and the fourth crossbeam 27. A rake blade shaft 29 is fixedly installed in the mounting through hole of each spring-type independent rake blade seat, and a rake blade 28 is rotatably installed on the outer side of each rake blade shaft 29. A first articulated frame 30 is hingedly installed on the rear side of the frame 18. A first soil crushing roller 33 and a first soil pressing roller 36 are installed at intervals in front and back on the lower side of the first articulated frame 30. The left upper side of the rear of the frame 18 At least one first pressing assembly is provided at intervals on the right, which enables the first crushing roller 33 and the first compacting roller 36 to compact the ground. A second articulated frame 31 is hingedly installed on the rear side of the left mounting frame 20 corresponding to the left position of the first articulated frame 30. A second crushing roller 34 and a second compacting roller 37 are installed at intervals on the front and rear sides of the second articulated frame 31. At least one second compacting assembly 39 is provided at intervals on the left and right sides of the upper rear side of the left mounting frame 20. A third articulated frame 32 is hingedly installed on the rear side of the right mounting frame 24 corresponding to the right position of the first articulated frame 30. A third crushing roller 35 and a The third soil-pressing roller 38, at least one third clamping assembly 40 is provided at intervals on the left and right sides of the upper rear side of the right mounting frame 24, the structure of the second clamping assembly 39 and the third clamping assembly 40 are the same as the structure of the first clamping assembly, and a suspension frame 41 is fixedly installed on the lower rear side of the frame 18 between the front of the first articulated frame 30 and the rear of the second crossbeam 23, and an axle 42 is rotatably installed on the lower side of the suspension frame 41, and transport wheels 43 are installed on the left and right parts of the axle 42, and a supporting cylinder 44 is installed on the upper rear side of the frame 18, and the rear end of the piston rod of the supporting cylinder 44 is hingedly installed to the outer upper part of the axle 42.

[0055] According to the needs, the left drive mechanism 21, the right drive mechanism 25 and the supporting cylinder are all existing well-known hydraulic cylinders, which are connected to the hydraulic system of the tractor. An existing well-known articulated seat is fixedly installed on the upper rear side of the axle 42, and the rear end of the piston rod of the supporting cylinder 44 is hingedly installed with the articulated seat. The setting of the articulated seat facilitates the disassembly and assembly between the piston rod of the supporting cylinder 44 and the axle 42. After the piston rod of the supporting cylinder 44 is extended and retracted, the rotation of the axle 42 can be made more labor-saving, and the transport wheel 43 can be quickly raised to start leveling the land or quickly lowered for transfer. The first soil crushing roller 33, the second soil crushing roller 34 and the third soil crushing roller 35 are all existing well-known technologies, and the first soil pressing roller 36, the second soil pressing roller 37 and the third soil pressing roller 38 are all existing well-known technologies. The left end of the soil crushing roller is located on the right side of the soil pressing roller, so that the soil blocks between the soil crushing rollers can be crushed.

[0056] When in use, the traction frame 19 is connected to the tractor. When the tractor drives the frame 18 forward, the piston rod of the supporting cylinder 44 is retracted, which drives the axle 42 to rotate, thereby raising the transport wheel 43, so that the rake blade 28, the crushing roller and the soil pressing roller contact the soil surface, and the land preparation operation begins. When the land preparation operation is completed, the piston rod of the supporting cylinder 44 is extended, which drives the axle 42 to rotate, thereby lowering the transport wheel 43, so that the rake blade 28, the crushing roller and the soil pressing roller keep a distance from the ground, which is convenient for the transfer and transportation of the land preparation machine. By setting the left drive mechanism 21 and the right The driving mechanism 25 can realize a folding effect by rotating the left mounting frame 20 and the right mounting frame 24 90 degrees when transferring the land leveling machine, so that the land leveling machine can be moved on narrow roads. In order to improve the safety of rotating the left mounting frame 20 and the right mounting frame 24 90 degrees, two support frames are fixedly installed on the upper left and right sides of the rear part of the frame 18 at intervals. After the left mounting frame 20 and the right mounting frame 24 are rotated 90 degrees, they are respectively fixed together with the corresponding support frames to improve stability. By setting a compaction component, the soil crushing roller and the soil pressing roller can compact the soil surface, thereby improving the land leveling effect.

[0057] The above-mentioned land preparation machine can be further optimized and / or improved according to actual needs:

[0058] Example 10: As an optimization of the above embodiment, as shown in the attached Figures 1 to 11 As shown, the right portion of the first crossbeam 22 is tilted backward relative to the left portion, and the right portion of the third crossbeam 26 is tilted forward relative to the left portion. The lower portions of the rotating arms 2 of the spring-type independent rake blade seats on the lower sides of the first crossbeam 22 and the fourth crossbeam 27 are bent downward to the right to form a support portion 8, and the lower portions of the rotating arms 2 of the spring-type independent rake blade seats on the lower sides of the second crossbeam 23 and the third crossbeam 26 are bent downward to the left to form a support portion 8.

[0059] The first crossbeam 22 and the third crossbeam 26 are symmetrically arranged on the left and right, and the second crossbeam 23 and the fourth crossbeam 27 are symmetrically arranged on the left and right. The harrow blades 28 on the lower sides of the first crossbeam 22 and the lower sides of the fourth crossbeam 27 are both open to the left, and the harrow blades 28 on the lower sides of the second crossbeam 23 and the lower sides of the third crossbeam 26 are both open to the right. This avoids the formation of harrow furrows or missed harrowing on the soil surface after land preparation, and the surface of the treated land is smoother.

[0060] Example 11: As an optimization of the above example, as shown in the attached Figures 7 to 11 As shown, a V-shaped front scraper plate 45 with its opening facing backward is fixedly installed on the lower front side of the traction frame 19, a support arm 46 is fixedly installed on the upper front side of the vehicle frame 18, an articulated sleeve 47 is hingedly installed on the upper end of the support arm 46, a front adjusting rod 48 is installed in the articulated sleeve 47, and a second elastic reset member 49 is installed between the rear part of the front adjusting rod 48 and the rear part of the articulated sleeve 47, and a third elastic reset member 50 is installed between the front part of the front adjusting rod 48 and the front part of the articulated sleeve 47.

[0061] According to the requirements, the second elastic return member 49 and the third elastic return member 50 are both existing well-known compression springs. In order to increase the force-bearing area of ​​the second elastic return member 49 and the third elastic return member 50, the upper and lower parts of the front adjusting rod 48 are both equipped with front support pads, and the ends of the front support pads away from the compression springs are provided with front adjusting nuts screwed to the outside of the front adjusting rod 48. In this way, by adjusting the two front adjusting nuts on the upper and lower parts of the front adjusting rod 48, the swing angle of the traction frame 19 relative to the frame 18 can be limited, and the height of the frame 18 during operation can be adjusted.

[0062] There are four connecting rods spaced apart between the front scraper plate 45 and the traction frame 19, so that the front scraper plate 45, the traction frame 19, and the connecting rod form a parallelogram connecting rod structure, and two symmetrically arranged adjusting connecting rods are fixedly installed on the inner side of the rear of the front scraper plate 45, and the adjusting connecting rods are all in an inverted T-shape. A number of adjusting holes that pass through the front and back are provided at intervals on the upper and lower outer sides of the upper part of each adjusting connecting rod, and a mounting pin whose lower end contacts the traction frame 19 is installed in the corresponding adjusting hole of one of the two adjusting connecting rods. In this way, the height of the front scraper plate 45 can be adjusted, and the front scraper plate 45 can be adjusted according to the properties of the soil, so that the front scraper plate 45 can not only have a scraping effect, but also avoid deformation and breakage due to excessive resistance.

[0063] Example 12: As an optimization of the above example, as shown in the attached Figures 7 to 11 As shown, the first clamping assembly includes a fixed seat 51, a rear adjusting rod 52 and a fourth elastic reset member 53. The fixed seat 51 is fixedly installed on the upper side of the rear of the frame 18, the rear adjusting rod 52 is hingedly installed between the upper part of the fixed seat 51 and the upper side of the front of the first articulated frame 30, and the fourth elastic reset member 53 is installed between the upper side of the rear adjusting rod 52 and the fixed seat 51.

[0064] According to the needs, a buffer sleeve is hingedly installed in the fixed seat 51 and is mounted on the outside of the rear adjusting rod 52. The upper and lower ends of the rear adjusting rod 52 are provided with rear support pads and rear adjustment nuts. The fourth elastic reset member 53 is a compression spring mounted between the upper end of the rear support pad and the lower end of the buffer sleeve. By rotating the two rear adjusting nuts, the first articulated frame 30 can play a buffering and shock-absorbing effect when floating up and down, thereby reducing damage to components and reducing the failure rate.

[0065] Example 13: As an optimization of the above embodiment, as shown in the attached Figures 8 to 11 As shown, a first soil compacting assembly is installed at the rear of the first articulated frame 30, and the first soil compacting assembly includes a soil compacting plate 54, a soil compacting rod 55, a soil compacting rod 56 and a fifth elastic reset member 57. A soil compacting plate 54 is provided at the lower rear of the first articulated frame 30 corresponding to the rear position of the first soil compacting roller 36. A plurality of soil compacting rods 55 are installed at intervals on the left and right between the upper side of the soil compacting plate 54 and the lower side of the rear of the first articulated frame 30. The front of each soil compacting rod 55 is inclined upward relative to the rear. A soil compacting rod 56 is hingedly installed between the upper side of the rear of the soil compacting rod 55 and the rear side of the first articulated frame 30. A fifth elastic reset member 57 is installed between the soil compacting rod 56 and the first articulated frame 30. A second soil compacting assembly 58 with the same structure as the first soil compacting assembly is provided at the rear of the second articulated frame 31 and the third articulated frame 32.

[0066] According to the needs, a limiting sleeve is hingedly installed at the rear of the first articulated frame 30, and the upper end of the soil-pressing rod 56 passes through the upper end of the limiting sleeve and is screwed with a soil-pressing adjusting nut. The fifth elastic reset member 57 is a compression spring mounted on the outside of the soil-pressing rod 56 at the lower end of the limiting sleeve. The outer side of the lower part of the soil-pressing rod 56 at the lower end of the fifth elastic reset member 57 is sequentially installed with soil-pressing gaskets and soil-pressing nuts from top to bottom. Adjusting the soil-pressing adjusting nut and the soil-pressing nut can adjust the height of the soil-pressing plate 54, thereby adjusting the degree of compaction of the soil surface.

[0067] Example 14: As an optimization of the above embodiment, as shown in the attached Figures 8 to 11 As shown, a first leveling assembly is provided at the rear of the frame 18, and the first leveling assembly includes a leveling plate 59, a leveling rod 60 and a sixth elastic return member 61. A leveling plate 59 is provided at the lower rear portion of the frame 18 corresponding to the position of the first articulated frame 30, and a plurality of leveling rods 60 are provided at intervals on the left and right sides between the upper rear side of the leveling plate 59 and the rear side of the frame 18. A sixth elastic return member 61 is installed between each leveling rod 60 and the frame 18, and a second leveling assembly 62 with the same structure as the first leveling assembly is installed at the lower rear side of the frame 18 corresponding to the positions of the second articulated frame 31 and the third articulated frame 32.

[0068] If required, the leveling plate 59 is V-shaped, opening downward, and can be made of angle steel. A lifting lug is fixed to the lower rear side of the vehicle frame 18, corresponding to the position of the first articulated frame 30. The upper end of the leveling rod 60 passes through the lifting lug and is screwed onto a leveling adjustment nut. The sixth elastic reset member 61 is a compression spring mounted on the outside of the leveling rod 60 below the lifting lug. Leveling washers and leveling nuts are sequentially mounted on the outside of the lower portion of the leveling rod 60 below the sixth elastic reset member 61, from top to bottom. Adjusting the leveling adjustment nut adjusts the height of the leveling plate 59, thereby adjusting the leveling height of the soil surface.

[0069] The above technical features respectively constitute the various embodiments of the present invention, which have strong adaptability and optimal implementation effects. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A spring-type independent rake blade seat, characterized in that It includes a mounting seat, a rotating arm, a limit plate, a tensioning rod and a first elastic reset part. A fixed shaft is detachably fixedly installed on the inner side of the lower part of the mounting seat, and a rotating arm is rotatably installed on the outer side of the fixed shaft. A mounting through hole is provided on the left side of the lower part of the rotating arm corresponding to the rear position of the fixed shaft. A spacing is provided between the projection of the center axis of the mounting through hole on the horizontal plane and the projection of the center axis of the fixed shaft on the horizontal plane. A limiting plate is fixedly installed on the inner side of the rear part of the mounting seat corresponding to the position above the fixed shaft, and a through hole is provided on the front side of the limiting plate. A tensioning rod is hingedly installed on the upper part of the rotating arm corresponding to the position above the fixed shaft, and the rear end passes through the through hole and is located behind the limiting plate. A first elastic reset part is installed between the rear of the tensioning rod and the rear side of the limiting plate.

2. The spring-type independent rake blade seat according to claim 1, characterized in that The lower portion of the rotating arm is bent toward the lower left to form a support portion, or the lower portion of the rotating arm is bent toward the lower right to form a support portion, and the mounting through hole is provided at the lower portion of the support portion.

3. The spring-type independent rake blade seat according to claim 1 or 2, characterized in that A limiting surface is provided on the rear side of the rotating arm corresponding to the rear position of the fixed shaft, and the upper portion of the limiting surface is inclined forward relative to the lower portion.

4. The spring-type independent rake blade seat according to claim 1 or 2, characterized in that A backing plate is sleeved on the outer side of the rear portion of the tension rod, a loose nut is screwed on the outer side of the tension rod corresponding to the rear side of the backing plate, and a first elastic reset member is sleeved on the outer side of the tension rod between the front side of the backing plate and the rear side of the limit plate; Or / and, a U-shaped connecting ear with an opening facing forward is fixedly installed at the front end of the tensioning rod, the rear side of the connecting ear contacts the front side of the limit plate, and the upper part of the rotating arm is hingedly installed on the inner side of the front part of the connecting ear.

5. The spring-type independent rake blade seat according to claim 3, characterized in that A backing plate is sleeved on the outer side of the rear portion of the tension rod, a loose nut is screwed on the outer side of the tension rod corresponding to the rear side of the backing plate, and a first elastic reset member is sleeved on the outer side of the tension rod between the front side of the backing plate and the rear side of the limit plate; Or / and, a U-shaped connecting ear with an opening facing forward is fixedly installed at the front end of the tensioning rod, the rear side of the connecting ear contacts the front side of the limit plate, and the upper part of the rotating arm is hingedly installed on the inner side of the front part of the connecting ear.

6. The spring-type independent rake blade seat according to claim 1, 2 or 5, characterized in that A hinge hole is provided on the left side of the lower part of the mounting seat, which passes through the left and right sides. The fixed shaft is sleeved in the hinge hole. A disassembly plate is fixedly installed on the outer side of the left end of the fixed shaft. A positioning hole is provided on the left side of the upper part of the disassembly plate. A fixing screw hole is provided on the left side of the mounting seat corresponding to the position above the fixed shaft. The positioning hole is provided with a locking bolt which is screwed into the fixing screw hole on the right side. Or / and, a fixing hole is provided on the left side of the upper portion of the rotating arm and is passed through from left to right. A fixing sleeve is fixedly installed in the fixing hole and is sleeved on the outside of the fixed shaft. An oil filling hole is provided on the outside of the fixing sleeve and is connected to the outside. An oil filling nozzle is fixedly installed on the outside of the fixing sleeve at the position of the oil filling hole. Or / and, a plurality of vertically penetrating connection holes are provided at intervals on the upper side of the mounting seat.

7. The spring-type independent rake blade seat according to claim 3, characterized in that A hinge hole is provided on the left side of the lower part of the mounting seat, which passes through the left and right sides. The fixed shaft is sleeved in the hinge hole. A disassembly plate is fixedly installed on the outer side of the left end of the fixed shaft. A positioning hole is provided on the left side of the upper part of the disassembly plate. A fixing screw hole is provided on the left side of the mounting seat corresponding to the position above the fixed shaft. The positioning hole is provided with a locking bolt which is screwed into the fixing screw hole on the right side. Or / and, a fixing hole is provided on the left side of the upper portion of the rotating arm and is passed through from left to right. A fixing sleeve is fixedly installed in the fixing hole and is sleeved on the outside of the fixed shaft. An oil filling hole is provided on the outside of the fixing sleeve and is connected to the outside. An oil filling nozzle is fixedly installed on the outside of the fixing sleeve at the position of the oil filling hole. Or / and, a plurality of vertically penetrating connection holes are provided at intervals on the upper side of the mounting seat.

8. The spring-type independent rake blade seat according to claim 4, characterized in that A hinge hole is provided on the left side of the lower part of the mounting seat, which passes through the left and right sides. The fixed shaft is sleeved in the hinge hole. A disassembly plate is fixedly installed on the outer side of the left end of the fixed shaft. A positioning hole is provided on the left side of the upper part of the disassembly plate. A fixing screw hole is provided on the left side of the mounting seat corresponding to the position above the fixed shaft. The positioning hole is provided with a locking bolt which is screwed into the fixing screw hole on the right side. Or / and, a fixing hole is provided on the left side of the upper portion of the rotating arm and is passed through from left to right. A fixing sleeve is fixedly installed in the fixing hole and is sleeved on the outside of the fixed shaft. An oil filling hole is provided on the outside of the fixing sleeve and is connected to the outside. An oil filling nozzle is fixedly installed on the outside of the fixing sleeve at the position of the oil filling hole. Or / and, a plurality of vertically penetrating connection holes are provided at intervals on the upper side of the mounting seat.

9. A soil leveling machine using the spring-type independent harrow blade seat according to any one of claims 1 to 8, characterized in that The vehicle comprises a frame, a left mounting frame, a right mounting frame, a spring-type independent rake blade seat, a rake blade and a transport wheel. A traction frame is hingedly installed on the front side of the frame, a left mounting frame is hingedly installed on the left side of the frame, a left driving mechanism capable of swinging the left mounting frame up and down is installed on the upper left side of the frame, a first crossbeam and a second crossbeam are fixedly installed at intervals at the front and rear sides of the lower side of the left mounting frame, a right mounting frame is hingedly installed on the right side of the frame, a right driving mechanism capable of swinging the right mounting frame up and down is installed on the upper right side of the frame, and a right driving mechanism capable of swinging the right mounting frame up and down is installed on the front and rear sides of the lower side of the right mounting frame. The third crossbeam and the fourth crossbeam are fixedly installed at intervals, and a plurality of spring-type independent rake blade seats are fixedly installed at intervals on the lower sides of the first crossbeam, the second crossbeam, the third crossbeam and the fourth crossbeam. A rake blade shaft is fixedly installed in the mounting through hole of each spring-type independent rake blade seat, and a rake blade is rotatably installed on the outer side of each rake blade shaft. A first articulated frame is hingedly installed on the rear side of the frame, and a first soil crushing roller and a first soil pressing roller are installed at intervals on the front and rear sides of the lower side of the first articulated frame. At least one The first pressing assembly can enable the first soil crushing roller and the first soil pressure roller to press the ground tightly, and the second articulated frame is hingedly installed on the rear side of the left mounting frame corresponding to the left position of the first articulated frame, and the second soil crushing roller and the second soil pressure roller are installed at intervals on the front and rear of the lower side of the second articulated frame, and at least one second pressing assembly is provided on the left and right upper side of the rear of the left mounting frame at intervals. The third articulated frame is hingedly installed on the rear side of the right mounting frame corresponding to the right position of the first articulated frame, and the third soil crushing roller and the third soil pressure roller are installed at intervals on the front and rear of the lower side of the third articulated frame, and at least one third pressing assembly is provided on the left and right upper side of the rear of the right mounting frame at intervals. The second pressing assembly structure and the third pressing assembly structure are the same as the first pressing assembly structure. The suspension frame is fixedly installed on the lower side of the rear of the frame corresponding to the position between the front of the first articulated frame and the rear of the second crossbeam, and the axle is rotatably installed on the lower side of the suspension frame, and transport wheels are installed on the left and right parts of the axle, and a support cylinder is installed on the upper side of the rear of the frame, and the rear end of the piston rod of the support cylinder is hingedly installed to the outer side of the upper axle.

10. The soil preparation machine according to claim 9, characterized in that The right portion of the first crossbeam is tilted backward relative to the left portion, the right portion of the third crossbeam is tilted forward relative to the left portion, the lower portions of the rotating arms of the spring-type independent harrow blade seats on the lower sides of the first crossbeam and the fourth crossbeam are bent downward to the right to form a support portion, and the lower portions of the rotating arms of the spring-type independent harrow blade seats on the lower sides of the second crossbeam and the third crossbeam are bent downward to the left to form a support portion; or / and, a V-shaped front scraper blade with a rearward opening is fixedly mounted on the lower front side of the traction frame, a support arm is fixedly mounted on the upper front side of the vehicle frame, an articulated sleeve is hingedly mounted on the upper end of the support arm, a front adjustment rod whose front end is hingedly mounted to the upper rear side of the traction frame is mounted in the articulated sleeve, a second elastic reset member is mounted between the rear part of the front adjustment rod and the rear part of the articulated sleeve, and a third elastic reset member is mounted between the front part of the front adjustment rod and the front part of the articulated sleeve; Or / and, the first clamping assembly includes a fixing seat, a rear adjustment rod and a fourth elastic reset member, the fixing seat is fixedly mounted on the upper side of the rear portion of the frame, the rear adjustment rod is hingedly mounted between the upper portion of the fixing seat and the upper side of the front portion of the first articulated frame, and the fourth elastic reset member is mounted between the upper side of the rear adjustment rod and the fixing seat; Or / and, a first soil pressing assembly is installed at the rear of the first articulated frame, and the first soil pressing assembly includes a soil pressing plate, a soil pressing rod, a soil pressing rod and a fifth elastic reset member. A soil pressing plate is provided at the lower rear of the first articulated frame corresponding to the rear position of the first soil pressing roller, and a plurality of soil pressing rods are installed at intervals on the left and right between the upper side of the soil pressing plate and the lower side of the rear of the first articulated frame. The front of each soil pressing rod is inclined upward relative to the rear, and a soil pressing rod is hingedly installed between the upper side of the rear of the soil pressing rod and the rear side of the first articulated frame. A fifth elastic reset member is installed between the soil pressing rod and the first articulated frame, and a second soil pressing assembly with the same structure as the first soil pressing assembly is provided at the rear of the second articulated frame and the third articulated frame.

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