Film mulching and soil covering machine

Abstract

The utility model discloses a film mulching and soil covering machine which comprises a machine frame, and a soil covering assembly is installed at the rear end of the machine frame. A side film pressing assembly is mounted in front of the soil covering assembly; the side film pressing assembly comprises a film pressing wheel, a supporting plate, a mounting rod and a first connecting rod; a first connecting rod and a second connecting rod; the first connecting rod is hinged with the second connecting rod; the second connecting rod is bent, and one end of the second connecting rod is hinged to a rotating shaft of the film pressing wheel; a cylinder is rotationally mounted on the second connecting rod; the lower part of the mounting rod is provided with threads, and the lower end is in threaded connection with the cylinder; cotter pins are inserted into the upper part and the middle part of the mounting rod. The film pressing wheel has the advantages that the film pressing wheel can be suitable for the fluctuating ground, the film pressing wheel can be well attached to the ground, and therefore the two sides of a film are well pressed, and conditions are provided for follow-up soil covering operation.

Description

Technical Field

[0001] This utility model relates to the field of film laying machine technology, and in particular to a film laying and soil covering machine. Background Technology

[0002] Film mulching technology plays a vital role in agricultural production. Its main benefits lie in providing a favorable growing environment, promoting crop growth, and increasing yield and quality. Film mulching is essential for the cultivation of many crops, including tobacco and strawberries. While most existing film mulching machines are equipped with soil-covering components, uneven terrain prevents proper pressing of the film's sides during mulching, resulting in incomplete soil coverage. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a film laying and soil covering machine that can be applied to uneven ground, and can make the film pressing wheel fit well with the ground, thereby pressing the two sides of the film well and providing conditions for subsequent soil covering operations.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is a film-laying and soil-covering machine, including a frame, a soil-covering component installed at the rear end of the frame; a side-pressing film component installed in front of the soil-covering component; the side-pressing film component includes a rotatably mounted pressing wheel and a support plate fixed to the outer wall of the frame; the lower end of the mounting rod passes through the support plate, and a gap is left between the two; the lower end of the first connecting rod is hinged to the second connecting rod, and the upper end is fixed to the lower end of the support plate; the second connecting rod is bent, and one end of it is hinged to the rotating shaft of the pressing wheel; a cylinder is rotatably mounted on the second connecting rod; the lower part of the mounting rod is threaded, and its lower end passes through the cylinder, and the two are threadedly connected; a handle is fixed to the top of the mounting rod; cotter pins are inserted into the upper and middle parts of the mounting rod; a washer is installed between the upper cotter pin and the upper surface of the support plate; a washer is installed above the lower cotter pin; the upper end of the first spring contacts the lower end of the support plate, and the lower end contacts the lower washer.

[0005] Furthermore, the frame includes an L-shaped second insert rod fixedly connected to the support plate; the soil covering assembly includes a third outer tube fitted onto one end of the second insert rod, a fourth outer tube fixedly connected to the side wall of the third outer tube, a third insert rod inserted into the fourth outer tube, and a soil covering wheel rotatably installed at the lower end of the third insert rod.

[0006] Furthermore, the frame also includes a second outer tube, a U-shaped frame, a first outer tube, a movable outer tube, and a lower rod, all mounted on the second insert rod; one end of the U-shaped frame is fixedly connected to the second outer tube, and the other end is inserted into the first outer tube; the first outer tube is fixedly connected to the rear side of the movable outer tube; the movable outer tube is mounted on the lower rod.

[0007] Furthermore, a trenching assembly is installed on the front side of the movable outer tube; the trenching assembly includes a fixed square tube fixed to the front side of the movable outer tube, a first insert rod inserted into the fixed square tube, and a trenching shovel fixed to the lower end of the first insert rod; the fixed square tube and the first insert rod are fastened together by bolts.

[0008] Furthermore, the frame also includes two side plates, two inner rods, an outer rod, and a support rod; an inner rod is fixedly connected to one end of the inner wall of each of the two side plates; both ends of the outer rod are inserted into the two inner rods; a lower rod is fixedly connected to the lower end of the outer rod via the support rod; and a roller mounting assembly is installed in the middle of each of the two side plates.

[0009] Furthermore, the roller mounting assembly includes a second connecting plate that is detachably and fixedly mounted on the outside of the side plate; a sleeve is fixedly connected to the outer wall of each second connecting plate; one end of the insert shaft passes through the sleeve and is fixedly connected to a disc, and a clamping roller is rotatably mounted on the other end; a second spring is installed between the clamping roller and the second connecting plate.

[0010] Furthermore, the second connecting plate and the side plate are fastened together by bolts; the second connecting plate has a strip hole for the bolt to pass through.

[0011] Furthermore, an intermediate pressing assembly is installed between the rear ends of the two side plates; the intermediate pressing assembly includes two rotating shafts and bushings; a second tube sleeve is fixedly connected to the outer wall of each side plate; one end of each rotating shaft passes through the second tube sleeve and is fixedly connected to a positioning plate; the positioning plate is in contact with the outer wall of the side plate; several positioning holes are provided on the side plate in an arc shape with the rotating shaft as the center; the positioning plate is fastened to the side plate by bolts; both ends of the bushing are respectively fitted onto the two rotating shafts; several insertion holes are provided at equal intervals on the bushing and the two rotating shafts; mounting plates are fixedly connected to the side walls of both ends of the bushing; a first connecting plate is installed on each mounting plate; a pressing roller is rotatably installed between the two first connecting plates.

[0012] Furthermore, the first connecting plate is connected to the mounting plate by bolts; the first connecting plate has a strip hole for the bolt to pass through.

[0013] Furthermore, one end of the cylinder is provided with a shoulder, and a groove is opened at one end of the cylinder; a retaining spring is installed in the groove; one end of the cylinder passes through the second connecting rod, and the second connecting rod is located between the shoulder and the retaining spring.

[0014] Furthermore, the front side of the lower rod is fixedly connected to a connecting part for connecting with an external traction device.

[0015] The beneficial effects of this utility model are:

[0016] Before operation, the mounting rod is rotated according to the height of the level ground or raised ground, driving the cylinder to move horizontally along the mounting rod, thereby adjusting the height of the pressure roller. During operation, when the pressure roller encounters a raised area, it is lifted up, causing the second connecting rod to rotate around its hinge point with the first connecting rod. During the rotation of the second connecting rod, the cylinder 31 moves obliquely upward. Due to the threaded connection between the cylinder and the mounting rod, the cylinder also causes the mounting rod to move obliquely upward. Under the action of the mounting rod, the cylinder and the cylinder rotate together at a certain angle. The gap between the mounting rod and the support plate allows the mounting rod to rotate at a certain angle. At this time, the first spring is compressed. After passing through the raised area, the pressure roller descends under the thrust of the first spring until the mounting rod descends to the point where the cotter pin at its top contacts the washer. This invention allows for adjustment of the installation height of the pressure roller as needed and is applicable to undulating ground, ensuring that the pressure roller fits well against the ground, thus effectively pressing down both sides of the film and providing conditions for subsequent soil covering operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0018] Figure 2 for Figure 1 Enlarged view of the structure of the mid-side pressure membrane assembly;

[0019] Figure 3 for Figure 2 Structural diagram of the central cylinder and schematic diagram of the connection between the cylinder and the second connecting rod;

[0020] Figure 4 for Figure 1 Enlarged view of the structure at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the trenching component in an embodiment;

[0022] Figure 6 This is a schematic diagram of the soil covering component in an embodiment.

[0023] In the diagram, 1-outer rod, 2-inner rod, 3-side plate, 4-support rod, 5-lower rod, 6-movable outer tube, 7-first outer tube, 8-U-shaped frame, 9-first insert rod, 10-fixed square tube, 11-trenching shovel, 12-second outer tube, 13-second insert rod, 14-film pressing wheel, 15-third outer tube, 16-fourth outer tube, 17-third insert rod, 18-covering wheel, 19-rotating shaft, 20-positioning plate, 21-positioning hole, 2 2-Sleeve, 23-Insertion hole, 24-Mounting plate, 25-First connecting plate, 26-Pressure roller, 27-Support plate, 28-Mounting rod, 29-First connecting rod, 30-Second connecting rod, 31-Cylinder, 3101-Shoulder, 3102-Slot, 32-First spring, 33-Washer, 34-Handle, 35-Second connecting plate, 36-Clamping roller, 37-Tube sleeve, 38-Insertion shaft, 39-Second spring, 40-Snap ring. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] Example

[0026] A type of film-laying and soil-covering machine, such as Figure 1-6 As shown, the machine includes a frame, with a soil covering assembly installed at the rear end of the frame; a side-pressing membrane assembly is installed at the front of the soil covering assembly; the side-pressing membrane assembly includes a rotatably mounted pressing wheel 14 and a support plate 27 fixed to the outer wall of the frame; the lower end of the mounting rod 28 passes through the support plate 27, with a gap between them; the lower end of the first connecting rod 29 is hinged to the second connecting rod 30, and the upper end is fixed to the lower end of the support plate 27; the second connecting rod 30 is bent, and one end of it is hinged to the rotating shaft of the pressing wheel 14; the second connecting rod 29... A cylinder 31 is rotatably mounted on the rod 30; the lower part of the mounting rod 28 is threaded, and its lower end passes through the cylinder 31, and the two are threadedly connected; a handle 34 is fixedly connected to the top of the mounting rod 28; cotter pins are inserted into the upper and middle parts of the mounting rod 28; a washer 33 is installed between the upper cotter pin and the upper surface of the support plate 27; a washer 33 is installed above the lower cotter pin; the upper end of the first spring 32 contacts the lower end of the support plate 27, and the lower end contacts the lower washer 33.

[0027] Before operation, the mounting rod 28 is rotated according to the height of the level ground or the raised bed, driving the cylinder 31 to translate along the mounting rod 28, thereby adjusting the height of the pressure roller 14. During operation, the pressure roller 14 is lifted when it encounters a raised area, causing the second connecting rod 30 to rotate around its hinge point with the first connecting rod 29. During the rotation of the second connecting rod 30, the cylinder 31 moves obliquely upward. Due to the threaded connection between the cylinder 31 and the mounting rod 28, the cylinder 31 also causes the mounting rod 28 to move obliquely upward. Under the action of the mounting rod 28, the cylinder 31 and the rod rotate together at a certain angle. The gap between the mounting rod 28 and the support plate 27 allows the mounting rod 28 to rotate at a certain angle. At this time, the first spring 32 is compressed. After passing through the raised area, the pressure roller 14 descends under the thrust of the first spring 32 until the mounting rod 28 descends to the point where its upper cotter pin contacts the washer 33. This invention allows for adjustment of the installation height of the pressing roller 14 as needed, and is applicable to uneven ground. It enables the pressing roller 14 to fit well against the ground, thereby pressing the two sides of the film well and providing conditions for subsequent soil covering operations.

[0028] The frame includes an L-shaped second insert rod 13 fixedly connected to the support plate 27; the soil covering assembly includes a third outer tube 15 fitted onto one end of the second insert rod 13, a fourth outer tube 16 fixed to the side wall of the third outer tube 15, a third insert rod 17 inserted into the fourth outer tube 16, and a soil covering wheel 18 rotatably mounted on the lower end of the third insert rod 17. The second insert rod 13 and the third outer tube 15, and the fourth outer tube 16 and the third insert rod 17 are both fastened together with bolts. By adjusting the installation position of the third outer tube 15 on the second insert rod 13, the distance between the two soil covering wheels 18 can be adjusted, thus accommodating different film laying widths. By adjusting the height at which the third insert rod 17 is inserted into the fourth outer tube 16, the installation height of the soil covering wheel 18 can be adjusted.

[0029] The frame also includes a second outer tube 12, a U-shaped frame 8, a first outer tube 7, a movable outer tube 6, and a lower rod 5, all mounted on the second insertion rod 13. One end of the U-shaped frame 8 is fixed to the second outer tube 12, and the other end is inserted into the first outer tube 7. The first outer tube 7 is fixed to the rear side of the movable outer tube 6. The movable outer tube 6 is mounted on the lower rod 5. The movable outer tube 6 and the lower rod 5 are fastened together by bolts. The first outer tube 7 and the U-shaped frame 8 can also be fastened together by bolts, or by having insertion holes on both the first outer tube 7 and the U-shaped frame 8, and using cylindrical pins and cotter pins to connect the first outer tube 7 and the U-shaped frame 8. By adjusting the installation position of the movable outer tube 6 and the position of the U-shaped frame 8 inserted into the first outer tube 7, the positions of the side-pressure membrane assembly and the soil covering assembly can be further adjusted to accommodate different membrane laying widths.

[0030] A trenching assembly is also installed on the front side of the movable outer tube 6; the trenching assembly includes a fixed square tube 10 fixed to the front side of the movable outer tube 6, a first insert rod 9 inserted into the fixed square tube 10, and a trenching shovel 11 fixed to the lower end of the first insert rod 9; the fixed square tube 10 and the first insert rod 9 are fastened together by bolts.

[0031] The frame also includes two side plates 3, two inner rods 2, an outer rod 1, and a support rod 4. An inner rod 2 is fixedly connected to one end of the inner wall of each of the two side plates 3. Both ends of the outer rod 1 are inserted into the two inner rods 2. A lower rod 5 is fixedly connected to the lower end of the outer rod 1 via the support rod 4. Roller mounting assemblies are installed in the middle of each of the two side plates 3. The inner rods 2 and outer rods 1 are fastened together with bolts. The depth to which the inner rod 2 is inserted into the outer rod 1 can be adjusted according to the actual film laying width requirements, thereby adjusting the distance between the roller mounting assemblies.

[0032] The film roll mounting assembly includes a second connecting plate 35 detachably and fixedly mounted on the outside of the side plate 3; a sleeve 37 is fixedly connected to the outer wall of each second connecting plate 35; one end of the insert shaft 38 passes through the sleeve 37 and is fixedly connected to a disc, while the other end is rotatably mounted with a clamping roller 36; a second spring 39 is installed between the clamping roller 36 and the second connecting plate 35. Holding the disc fixed to one end of the insert shaft 38 and pulling it outwards increases the distance between the clamping rollers 36 on both sides, compressing the second spring 39 and placing the corresponding size film roll in the appropriate position. Releasing the disc causes the clamping rollers 36 on both sides to move towards each other under the action of the second spring 39 until the clamping roller 36 is inserted into one end of the film roll. The width of the film laying can be flexibly adjusted according to actual needs, facilitating the assembly and disassembly of the film roll, making it flexible and highly practical.

[0033] The second connecting plate 35 and the side plate 3 are fastened together by bolts; the second connecting plate 35 has a strip hole for the bolt to pass through. The installation height of the second connecting plate 35 relative to the side plate 3 can be adjusted through the strip hole, thereby adjusting the height of the film roll off the ground, so as to adapt to flat ground and ridging.

[0034] An intermediate film pressing assembly is installed between the rear ends of the two side plates 3. The intermediate film pressing assembly includes two rotating shafts 19 and bushings 22. Second tube sleeves are fixed to the outer walls of the side plates 3. One end of the rotating shaft 19 passes through the second tube sleeve and is fixed to a positioning plate 20. The positioning plate 20 fits against the outer wall of the side plate 3. Several positioning holes 21 are provided on the side plate 3 in an arc shape with the rotating shaft 19 as the center. The positioning plate 20 is fastened to the side plate 3 by bolts. The two ends of the bushing 22 are respectively fitted onto the two rotating shafts 19. Several insertion holes 23 are provided at equal intervals on the bushing 22 and the two rotating shafts 19. Mounting plates 24 are fixed to the side walls of both ends of the bushing 22. First connecting plates 25 are installed on the mounting plates 24. A film pressing roller 26 is rotatably installed between the two first connecting plates 25. The film pressing roller 26 plays the role of pressing the middle part of the film. Based on the membrane's height from the ground, the positioning plate 20 is installed on the appropriate positioning hole 21 using bolts and nuts, thereby adjusting the tilt angle of the first connecting plate 25 relative to the ground, and thus adjusting the height of the pressure roller 26 from the ground. The bushing 22 and the rotating shaft 19 are connected by a cylindrical pin passing through them, along with a cotter pin, or by wrapping with wire. When adjusting the distance between the side plates 3, it is adjusted according to certain specifications. In this embodiment, the spacing between adjacent insertion holes 23 is 10 cm, and the adjustment distance on one side of the side plate 3 is an integer multiple of 10 cm. During adjustment, the distance between the two rotating shafts 19 changes, the insertion holes 23 on the bushing 22 and the original insertion holes 23 on the rotating shaft 19 are misaligned, and they are re-aligned with the other insertion holes 23 on the rotating shaft 19.

[0035] The height of the pressure roller 26 above the ground is further adjusted, and the first connecting plate 25 is connected to the mounting plate 24 by bolts; the first connecting plate 25 has a strip hole for the bolt to pass through.

[0036] One end of the cylinder 31 is provided with a shoulder 3101, and the other end of the cylinder 31 has a groove 3102; a retaining spring 40 is installed in the groove 3102; one end of the cylinder 31 passes through the second connecting rod 30, and the second connecting rod 30 is located between the shoulder 3101 and the retaining spring 40. The retaining spring 40 can restrict the axial movement of the cylinder 31 and the second connecting rod 30, but does not restrict the rotation of the cylinder 31.

[0037] The front side of the lower rod 5 is fixed with a connecting part for connecting to an external traction device. During operation, this device is mounted on a traction machine via the connecting part, and the traction machine drives the device to move.

[0038] The working principle of this utility model:

[0039] Before operation, the mounting rod 28 is rotated according to the height of the level ground or the raised bed, driving the cylinder 31 to translate along the mounting rod 28, thereby adjusting the height of the pressure roller 14. During operation, the pressure roller 14 is lifted when it encounters a raised area, causing the second connecting rod 30 to rotate around its hinge point with the first connecting rod 29. During the rotation of the second connecting rod 30, the cylinder 31 moves obliquely upward. Due to the threaded connection between the cylinder 31 and the mounting rod 28, the cylinder 31 also causes the mounting rod 28 to move obliquely upward. Under the action of the mounting rod 28, the cylinder 31 and the rod rotate together at a certain angle. The gap between the mounting rod 28 and the support plate 27 allows the mounting rod 28 to rotate at a certain angle. At this time, the first spring 32 is compressed. After passing through the raised area, the pressure roller 14 descends under the thrust of the first spring 32 until the mounting rod 28 descends to the point where its upper cotter pin contacts the washer 33. This invention allows for adjustment of the installation height of the pressing roller 14 as needed, and is applicable to uneven ground. It enables the pressing roller 14 to fit well against the ground, thereby pressing the two sides of the film well and providing conditions for subsequent soil covering operations.

[0040] When the film-laying width needs to be adjusted, loosen the fastening bolts, adjust the length of the inner rods 2 inserted into the outer rods 1 on both sides, so that the distance between the two clamping rollers 36 is adjusted to the predetermined distance, and then tighten the fastening bolts again. This utility model can also adjust the distance between the two trenching shovels 11, the two film pressing rollers 14 and the two soil covering rollers 18, so as to adapt to different film-laying widths.

[0041] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A mulch layer and coverer characterised in that: The machine frame comprises a back-end soil covering assembly, and a front-end side film pressing assembly; the side film pressing assembly comprises a rotatingly installed film pressing wheel (14), a support plate (27) fixed to the outer wall of the machine frame, and a mounting rod (28) whose lower end penetrates the support plate (27) with a gap left between them; the lower end of a first connecting rod (29) is hingedly connected to a second connecting rod (30), and the upper end of the first connecting rod (29) is fixed to the lower end of the support plate (27); the second connecting rod (30) is in a bent shape, and one end thereof is hingedly connected to the rotating shaft of the film pressing wheel (14); a cylinder (31) is rotatingly installed on the second connecting rod (30); the lower part of the mounting rod (28) is provided with a screw thread, and the lower end thereof penetrates the cylinder (31) and is screw-connected thereto; a handle (34) is fixed to the top end of the mounting rod (28); split pins are inserted into the upper and middle parts of the mounting rod (28); a gasket (33) is installed between the upper surface of the support plate (27) and the split pin in the upper part; a gasket (33) is installed above the split pin in the lower part; the upper end of a first spring (32) is in contact with the lower end of the support plate (27), and the lower end of the first spring (32) is in contact with the gasket (33) in the lower part.

2. The mulch layer and soil coverer of claim 1 wherein: The machine frame further comprises an L-shaped second insertion rod (13) fixed to the support plate (27); the soil covering assembly comprises a third outer tube (15) sleeving one end of the second insertion rod (13), a fourth outer tube (16) fixed to the side wall of the third outer tube (15), a third insertion rod (17) inserted into the fourth outer tube (16), and a soil covering wheel (18) rotatingly installed at the lower end of the third insertion rod (17).

3. The mulch layer and soil coverer of claim 2 wherein: The machine frame further comprises a second outer tube (12) sleeving the second insertion rod (13), a U-shaped frame (8), a first outer tube (7), a moving outer tube (6), and a lower rod (5); one end of the U-shaped frame (8) is fixed to the second outer tube (12), and the other end is inserted into the first outer tube (7); the first outer tube (7) is fixed to the rear side of the moving outer tube (6); the moving outer tube (6) is sleeved on the lower rod (5).

4. The mulch layer and soil coverer of claim 3 wherein: The front side of the moving outer tube (6) is further provided with a ditching assembly; the ditching assembly comprises a fixed square tube (10) fixed to the front side of the moving outer tube (6), a first insertion rod (9) inserted into the fixed square tube (10), and a ditching shovel (11) fixed to the lower end of the first insertion rod (9); the fixed square tube (10) and the first insertion rod (9) are fastened and connected by bolts.

5. The mulch layer and soil coverer of claim 3 wherein: The machine frame further comprises two side plates (3), two inner rods (2), an outer rod (1), and a support rod (4); the inner wall of each of the two side plates (3) is fixed with an inner rod (2) at one end; the two ends of the outer rod (1) are inserted into the two inner rods (2); the lower end of the outer rod (1) is fixed with the lower rod (5) through the support rod (4); each of the two side plates (3) is provided with a roller mounting assembly in the middle part.

6. The mulch layer and soil coverer of claim 5 wherein: The roll mounting assembly comprises second connecting plates (35) detachably and fixedly mounted outside the side plates (3); the outer wall of each second connecting plate (35) is fixedly connected with a pipe sleeve (37); one end of an insertion shaft (38) penetrates through the pipe sleeve (37) and is fixedly connected with a disc, and the other end is rotatably connected with a clamping roller (36); a second spring (39) is mounted between the clamping roller (36) and the second connecting plate (35).

7. The mulch layer and soil coverer of claim 6 wherein: The second connecting plate (35) and the side plate (3) are connected through bolt fastening; a strip-shaped hole for bolt penetration is formed in the second connecting plate (35).

8. The mulch layer and soil coverer of claim 5 wherein: An intermediate film pressing assembly is mounted between the rear ends of the two side plates (3); the intermediate film pressing assembly comprises two rotating shafts (19) and a shaft sleeve (22); the outer wall of the side plate (3) is fixedly connected with a second pipe sleeve; one end of the rotating shaft (19) penetrates through the second pipe sleeve and is fixedly connected with a positioning plate (20); the positioning plate (20) is attached to the outer wall of the side plate (3); a plurality of positioning holes (21) are formed in the side plate (3) and are arranged in an arc shape with the rotating shaft (19) as the center; the positioning plate (20) is fastened to the side plate (3) through bolts; the two ends of the shaft sleeve (22) are sleeved on the two rotating shafts (19); a plurality of insertion holes (23) are formed in the shaft sleeve (22) and the two rotating shafts (19) at equal intervals; the two end side walls of the shaft sleeve (22) are fixedly connected with mounting plates (24); the mounting plates (24) are mounted with first connecting plates (25); the two first connecting plates (25) are rotatably mounted with a film pressing roller (26).

9. The mulch layer and soil coverer of claim 8 wherein: The first connecting plate (25) and the mounting plate (24) are connected through bolts; a strip-shaped hole for bolt penetration is formed in the first connecting plate (25).

10. The mulch layer and soil coverer of claim 1 wherein: One end of the cylinder (31) is provided with a shaft shoulder (3101), and one end of the cylinder (31) is provided with a clamping groove (3102); a clamping spring (40) is mounted in the clamping groove (3102); one end of the cylinder (31) penetrates through the second connecting rod (30), and the second connecting rod (30) is located between the shaft shoulder (3101) and the clamping spring (40).

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