A film winding device and a full-automatic hydraulic baling and film wrapping machine

Abstract

The application discloses a film winding device and a full-automatic hydraulic baling and film wrapping machine. The film winding device comprises a film winding mechanism vertically arranged on a rack and through which a material to be packed passes horizontally from a center. A mounting rack for assembling a stretch film assembly is horizontally arranged on one side of the film winding mechanism. A film cutting mechanism for cutting the stretch film is arranged above the rack at the discharge end of the film winding mechanism through a vertical column perpendicular to the rack. The film winding mechanism rotates relative to the rack in a vertical plane to wrap the material to be packed. The full-automatic hydraulic baling and film wrapping machine comprises a rack, a PLC controller and a picking and throwing mechanism, a compression mechanism, the film winding device, a conveying mechanism and a film wrapping mechanism arranged on the rack in sequence. The application has the advantages of simple structure, stable work, low cost, automatic baling operation for the material passing through the center in the axial direction, improved baling and film wrapping efficiency and wide application range.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural and animal husbandry machinery and equipment, in particular to a film wrapping device used in a silage production process and the application of the film wrapping device to a film wrapping machine. Background Art

[0002] With the rapid development of my country's animal husbandry, the demand for forage is increasing. Natural forage grass is far from meeting the requirements of animal husbandry development, and therefore the area of ​​forage cultivation has also increased year by year. The traditional method of harvesting forage grass is to cut and dry it before harvesting hay, which results in a loss of forage nutrients. However, forage silage has been proven to be the best harvesting method for preserving forage nutrients, reducing losses, and facilitating storage. However, silage harvesters in my country are currently in their infancy, and the silage wrapping machines currently in use are mostly imported equipment, which is expensive and adds significant costs to forage cultivation. In addition, existing silage wrapping machines mainly use the principle of rotary rolling to compact the forage grass before wrapping it, resulting in a relatively complex structure. In addition, their wrapping methods are mostly limited to wrapping cylindrical forage. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a film wrapping device with a simple structure and a baling and wrapping machine equipped with the film wrapping device, which are used for harvesting silage to reduce costs and improve baling and wrapping efficiency.

[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0005] A film wrapping device includes a film wrapping mechanism vertically arranged on a frame and through which the material to be packaged passes horizontally from the center; a mounting frame for assembling a stretch film assembly is horizontally arranged on one side of the film wrapping mechanism; a film cutting mechanism for cutting the stretch film is arranged above the frame at the discharge end of the film wrapping mechanism through a column perpendicular to the frame; the film wrapping mechanism rotates in a vertical plane relative to the frame to wrap the material to be packaged.

[0006] The above-mentioned film wrapping device has a specific structure of the film wrapping mechanism as follows: the film wrapping mechanism includes a fixed ring assembly fixedly connected to the frame and a movable ring assembly rotating in a vertical plane relative to the fixed ring assembly, an inner ring gear is fixedly provided on one side of the movable ring assembly, a hydraulic motor for driving the inner ring gear and the movable ring assembly to rotate is horizontally provided on the fixed ring assembly, and the output shaft end of the hydraulic motor is connected to a driving gear meshing with the inner ring gear; the mounting frame for mounting the stretching film assembly is horizontally arranged on the discharge side of the movable ring assembly.

[0007] The improvement of the film wrapping mechanism of the above-mentioned film wrapping device is that the moving coil assembly is sleeved on the outer circumference side of the fixed coil assembly, and a plurality of rollers for limiting the moving coil assembly are evenly distributed on the circumference side of the fixed coil assembly.

[0008] The above-mentioned film wrapping device, the film wrapping mechanism is further improved in that: a plurality of fixing brackets for assembling the output housing of the material to be packaged are evenly distributed on the inner wall of the fixed ring component.

[0009] The above-mentioned film wrapping device, the specific structure of the film cutting mechanism is: the film cutting mechanism includes an L-shaped base vertically fixed on the front and rear side columns of the frame, a knife for hooking the stretch film is rotatably provided on the horizontal plate of the base, and a fixed knife for cooperating with the knife for cutting the stretch film and a driving mechanism for driving the knife to rotate are also fixedly provided on the horizontal plate of the base; the driving mechanism includes a motor and a reduction gear box connected by shafts, the reduction gear box and the motor are mounted above the horizontal plate on the base through a motor seat, and the reduction gear box passes through the bottom end of the output shaft of the motor seat and is fixedly connected to one end of the knife.

[0010] The improvement of the film cutting mechanism of the above-mentioned film wrapping device is that: the fixed knife is fixed to the base by two positioning columns perpendicular to the horizontal plate of the base, and a film pressing plate for pressing the film between the wrapping knife and the fixed knife is mounted on the positioning column above the fixed knife; a compression spring is mounted on the positioning column above the film pressing plate, and the top of the positioning column is limited by a matching nut to limit the compression spring.

[0011] A fully automatic hydraulic baling and wrapping machine includes the above-mentioned wrapping device, which shares a frame with the wrapping machine; the wrapping machine also includes a picking and throwing mechanism arranged from left to right on the frame for picking up and crushing the grass, a compression mechanism for compressing the crushed grass into shape, a conveying mechanism for conveying the shaped grass, and a wrapping mechanism for horizontally circumferentially wrapping the shaped grass; the wrapping device is installed between the compression mechanism and the conveying mechanism, and is used for wrapping the shaped grass in a vertical plane.

[0012] The above-mentioned fully automatic hydraulic baling and wrapping machine, the compression mechanism includes a vertically arranged receiving hopper and a compression hopper and a horizontally arranged discharge pipe, the top of the receiving hopper is connected to the throwing port of the picking and throwing mechanism, the bottom of the receiving hopper is connected to the middle of the compression hopper, the bottom of the compression hopper is connected to one end of the discharge pipe, the outer end of the discharge pipe is fixedly connected to the wrapping device, and the discharge pipe and the wrapping mechanism of the wrapping device are coaxially arranged; a feeding cylinder for pushing the grass into the compression hopper is provided on the inner wall of the receiving hopper, a compression cylinder for compressing the grass into shape is provided above the compression hopper, and a discharge cylinder for pushing the shaped grass to the discharge pipe for output is provided on the inner side wall of the compression hopper.

[0013] The improvement of the compression mechanism of the above-mentioned fully automatic hydraulic baling and wrapping machine lies in that the compression hopper and the discharge pipe are rectangular parallelepiped structures.

[0014] The above-mentioned fully automatic hydraulic baling and wrapping machine has a specific structure of the conveying mechanism as follows: the conveying mechanism includes two parallel walking tracks fixedly arranged on the frame, a frame is slidably mounted between the two walking tracks, a plurality of ratchet rollers perpendicular to the walking direction of the formed grass are mounted on the top of the frame, and a pushing cylinder is fixed on the frame to push the frame to move back and forth in the walking tracks.

[0015] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows.

[0016] The present invention has a simple structure, stable operation and low cost. The cooperation of the moving coil assembly and the fixed coil assembly can realize the automatic packaging operation of the material passing through the central axis, improves the sealing performance of the film wrapping and the baling efficiency, and can not only harvest silage, but also harvest dry straw, and wrap the dry straw into bales, so it has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the film wrapping device of the present invention;

[0018] Figure 2 This is an exploded view of the film wrapping mechanism of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the film cutting mechanism of the present invention;

[0020] Figure 4 This is a structural diagram of Application Example 1 of the present invention;

[0021] Figure 5 This is a schematic diagram of the compressed state of the grass in Application Example 1;

[0022] Figure 6 This is a schematic diagram of the structure of the compressed grass coating in Application Example 1;

[0023] Figure 7 Schematic diagram of the structure of the conveying mechanism described in Application Example 1;

[0024] Figure 8 This is a structural diagram of Application Example 2 of the present invention.

[0025] 1. Frame, 11. Column, 2. Picking and throwing mechanism, 3. Compression mechanism, 31. Feed cylinder, 32. Compression cylinder, 33. Discharge cylinder, 34. Rectangular straw, 35. Discharge port of compression mechanism; 4. Wrapping device, 41. Film cutting mechanism, 42. Film stretching, 43. Wrapping mechanism, 431. Moving coil assembly, 432. Inner gear ring, 433. Fixed coil assembly, 434. Roller, 435. Fixed bracket, 436. Hydraulic motor; 411. Base, 412. Motor base, 413. Motor, 414. Blade, 415. Film pressing plate, 416. Fixed blade, 417. Compression spring; 5. Conveying mechanism, 51. Travel track, 52. Ratchet roller, 53. Pulley, 54. Frame, 55. Pushing cylinder, 6. Wrapping mechanism. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific application examples.

[0027] A film wrapping device, the structure of which is as follows Figures 1 to 3 As shown, it includes a frame and a film wrapping mechanism 43, a stretch film assembly and a film cutting mechanism 41 arranged on the frame; the film wrapping mechanism 43 is vertically arranged on the frame, and the material to be packaged passes horizontally through the center of the film wrapping mechanism; a mounting frame is horizontally arranged on one side of the film wrapping mechanism 43 for assembling the stretch film 42 assembly, and a column 11 perpendicular to the frame is arranged above the frame at the discharge end of the film wrapping mechanism, and the film cutting mechanism 41 is mounted on the column for cutting the stretch film.

[0028] The wrapping mechanism 43 rotates in a vertical plane relative to the frame to wrap the material to be packaged. Figure 2 As shown, it includes a fixed ring assembly 433, a moving ring assembly 431, an inner gear ring 432, and a hydraulic motor 436. The fixed ring assembly 433 is fixedly connected to the frame, and the moving ring assembly 431 rotates in a vertical plane relative to the fixed ring assembly. The inner gear ring 432 is fixedly mounted on one side of the moving ring assembly, and the hydraulic motor 436 is horizontally mounted on the fixed ring assembly. The output shaft end of the hydraulic motor is connected to a drive gear that matches the inner gear ring. The hydraulic motor is used to drive the inner gear ring and the moving ring assembly to rotate. The mounting bracket for mounting the stretch film assembly is horizontally mounted on the discharge side of the moving ring assembly.

[0029] In the present invention, the inner diameter of the moving coil assembly 431 is larger than the outer diameter of the fixed coil assembly. The moving coil assembly is sleeved on the outer circumference of the fixed coil assembly 433. Several rollers 434 are evenly distributed around the circumference of the fixed coil assembly to support and limit the moving coil assembly and prevent it from deviating. A total of 16 rollers are provided in the present invention.

[0030] To facilitate fixing the fixed ring assembly on the frame and in accordance with the requirement that the material to be packaged passes through the central axis of the film wrapping mechanism, the present invention evenly arranges a number of fixing brackets 435 on the inner wall of the fixed ring assembly 433 for assembling the housing for outputting the material to be packaged.

[0031] When the film wrapping mechanism is in operation, the hydraulic motor is activated, driving the drive gear. Simultaneously, the internal gear ring meshing with the drive gear and the dynamic coil assembly fixedly connected to it rotate. The stretch film assembly, mounted on the mounting frame, rotates along with the dynamic coil assembly, while simultaneously rotating relative to the mounting frame to unwind the film. Because one end of the stretch film is secured by the film cutting mechanism, the film can be wrapped around the material being discharged during the dynamic coil assembly's rotation.

[0032] The film cutting mechanism 41 is used to fix one end of the stretch film and also to cut the stretch film after packaging is completed in the vertical plane. Figure 3 As shown, it includes a base 411, a motor base 412, a motor 413, a reduction gear box, a sweeping knife 414, a fixed knife 416 and a film pressing plate 415, wherein the shaft-connected motor 413 and the reduction gear box constitute a driving mechanism for driving the sweeping knife to rotate.

[0033] The base 411 is an L-shaped structure in a certain direction. The vertical plate of the base is vertically fixed on the columns on the front and rear sides of the frame. The motor base 412 is mounted above the horizontal plate on the base. The reduction gearbox and the motor are installed on the motor base. The reduction gearbox passes through the bottom end of the output shaft of the motor base and is fixedly connected to one end of the sweeping knife. The other end of the sweeping knife is a free end. The sweeping knife 414 can rotate in the horizontal plane relative to the horizontal plate of the base under the drive of the motor, and can realize 180° reciprocating swing.

[0034] Two positioning columns perpendicular to the base are fixedly set on the horizontal plate of the base. Two through holes are opened on the fixed knife. After the positioning columns pass through the two through holes of the fixed knife, the fixed knife is positioned on the horizontal plate of the base. The fixed knife cooperates with the sweeping knife to cut the stretch film 42.

[0035] A film pressing plate 415 is sleeved on the positioning column above the fixed knife. A gap is set between the film pressing plate 415 and the fixed knife 416, and the gap is greater than the thickness of the sweeping knife 414, which is used for the sweeping knife to enter and exit and to press the stretch film between the sweeping knife and the fixed knife.

[0036] In order to enable the film pressing plate to press the stretch film without affecting the rotation of the sweeping knife, the present invention has a compression spring 417 mounted on the positioning column above the film pressing plate, and the top of the positioning column limits the compression spring through a matching nut; at the same time, an elastic material is bonded under the film pressing plate 415, which can better clamp the stretch film between the sweeping knife and the film pressing plate. After the film wrapping mechanism is wrapped around the straw for more than two turns to form a self-pressure effect, the sweeping knife returns to the open position, and the end of the stretch film previously clamped between the sweeping knife and the film pressing plate naturally falls onto the straw bale.

[0037] When the film cutting mechanism is working, the reduction motor 413 drives the sweeping knife 414 to rotate 180 degrees. The sweeping knife 414 brings the stretched film into the gap between the film pressing plate 415 and the fixed knife 416. The stretched film located below the sweeping knife 414 is cut off, and the stretched film above is clamped between the sweeping knife 414 and the film pressing plate 415, thereby completing the film sweeping, film cutting and film clamping actions.

[0038] Application Example 1

[0039] This application example is an application of a film wrapping device, which is used in a fully automatic hydraulic baling and wrapping machine to achieve baling, wrapping and sealing of grass.

[0040] The film wrapping machine in this application example includes a frame 1, a PLC controller, and a picking and throwing mechanism 2, a compression mechanism 3, a film wrapping device 4, a conveying mechanism 5, and a film wrapping mechanism 6 arranged on the frame in sequence. The connection relationship between each mechanism is as follows: Figures 4 to 7 As shown, specifically: the frame 1 is the supporting part of the whole machine, the picking and throwing mechanism 2 is installed at the front of the frame 1; the compression mechanism 3 is installed in the middle of the frame 1, and the feeding port of the compression mechanism 3 corresponds to the throwing port of the picking and throwing mechanism 2; the film wrapping device 4 is installed at the discharge port position of the compression mechanism 3; the film wrapping mechanism 6 is installed at the rear of the frame 1; the conveying mechanism 5 is located between the compression mechanism 3 and the film wrapping mechanism 6.

[0041] A hydraulic station is also provided on the frame, which draws power from the rear output shaft of the tractor for use by the picking and throwing mechanism 2, compression mechanism 3, wrapping device 4, conveying mechanism 5, and wrapping mechanism 6 of the wrapping machine. Under the instruction of the PLC controller, it coordinates the picking, crushing and compression, wrapping of the inner circumference of the vertical plane, conveying, wrapping of the inner circumference of the horizontal plane, and unloading of forage. The wrapping machine completes the shaping and wrapping and sealing operations of the forage based on the hydraulic principle.

[0042] The picking and throwing mechanism 2 is used to pick up grass and crush it, and then throw the crushed grass into the compression mechanism. The picking and throwing mechanism 2 in the present invention is a common straw collector in the industry, which can be directly purchased and assembled for use.

[0043] The compression mechanism 3 is used to compress the crushed grass into shape. Its structure is as follows: Figure 5As shown, it includes a vertically arranged receiving hopper and a compression hopper and a horizontally arranged discharge pipe, the top of the receiving hopper is connected to the throwing port of the picking and throwing mechanism 2, the bottom of the receiving hopper is connected to the middle of the compression hopper, the bottom of the compression hopper is connected to one end of the discharge pipe, the outer end of the discharge pipe is fixedly connected to the wrapping device, and the wrapping mechanism of the discharge pipe wrapping device is coaxially arranged; a feeding cylinder 31 is provided on the inner wall of the receiving hopper, which is used to push the material into the compression chamber of the compression hopper; a compression cylinder 32 is provided above the compression hopper, which is used to compress the grass in the compression chamber into shape; a discharge cylinder 33 is provided on the inner side wall of the compression hopper, which is used to push the compressed grass to the discharge pipe for output.

[0044] This application example is used to achieve silage, that is, to achieve baling, film wrapping and sealing of forage. In order to facilitate storage and save storage space, the film-wrapped and sealed forage can be made into a rectangular parallelepiped shape. The compression hopper and discharge pipe in this application example are both set to a rectangular parallelepiped structure, such as Figure 5 shown.

[0045] The wrapping device 4 is installed between the compression mechanism 3 and the conveying mechanism 5 and is used to wrap the formed straw material in a vertical plane. In this application example, the discharge pipe of the compression mechanism should extend below the stretch film assembly. During the wrapping process, a portion of the stretch film will be wrapped around the outer wall of the discharge pipe, preventing the formed straw material from being scattered. During the wrapping process, the friction between the straw material and the discharge pipe is greater than the friction between the discharge pipe and the stretch film. As the formed straw material is wrapped and discharged, it will pull the stretch film wrapped around the discharge pipe off. The film will be repeatedly compressed and wrapped in the subsequent wrapping process, thereby achieving the wrapping and filming operation of the formed straw material, providing a foundation for subsequent sealing.

[0046] The length of the discharge pipe extending from the bottom of the stretch film assembly can be adjusted according to the compression density requirements of the grass, the relative width of the stretch film, and the viscosity of the grass. In this application example, the length of the discharge pipe extending from the bottom of the stretch film is two-thirds. Figure 5 and Figure 6 That is, during the wrapping process, one-third of the width of the stretch film is wrapped around the formed straw, and two-thirds of the width of the stretch film is wrapped around the outer wall of the discharge pipe.

[0047] The conveying mechanism 5 is used to convey the shaped straw material that has been wrapped in a vertical plane by the wrapping device and convey it to the wrapping mechanism 6.

[0048] The structure of the conveying mechanism 5 is as follows: Figure 6 and Figure 7As shown, it includes two running rails 51, a plurality of ratchet rollers 52 and pulleys 53, a frame 54 and a push cylinder 55. The two running rails 51 are fixedly arranged on the inner end surface of the frame in parallel; the frame 54 is slidably mounted between the two running rails 51, and a plurality of pulleys 53 are fixedly mounted on the two side walls of the frame, and the pulleys 53 are restricted to roll in the running rails 51.

[0049] The two ends of the ratchet roller 52 are respectively installed in parallel on the top of the frame through bearings. There is an anti-reversal mechanism inside the ratchet roller. The ratchet roller 52 is set perpendicular to the moving direction of the formed straw and can only rotate clockwise in the moving direction of the straw. The length of the ratchet roller 52 must be more than 10 cm less than the width of the straw bale to prevent the stretch film from being blocked when the wrapping mechanism 6 is working.

[0050] The pushing oil cylinder 55 is fixedly arranged on the frame, and its piston rod is fixedly connected to the frame body, and is used to push the frame body to move back and forth in the walking track.

[0051] In this application example, in order to facilitate material cutting, the end of the walking track is set to a downward curved structure, such as Figure 7 As shown; that is, when the frame runs to the end of the walking track, it will tilt slightly to facilitate the film on the ratchet roller to complete the falling of the grass.

[0052] The wrapping mechanism 6 is used to wrap the formed straw horizontally and circumferentially. It is a common mechanism in the industry and can be installed and used directly after purchase. Its main function is to wrap the straw bale with film on all four sides. It also has functions such as film cutting and film clamping, and can work continuously.

[0053] In this application example, when the grass is silaged, the grass is picked up from the ground by the picking and throwing mechanism 2 and thrown to the compression mechanism 3; the grass is pushed into the compression chamber by the feeding cylinder 31 in the compression mechanism 3, and the compression cylinder 32 compresses the grass to the set density, and then the grass is pushed out of the discharge pipe by the discharge cylinder 33 in the shape of a rectangular parallelepiped; during the process of the rectangular parallelepiped grass being pushed out, the film wrapping device 4 wraps the stretch film around the vertical surface of the rectangular parallelepiped grass; then the rectangular parallelepiped grass bale wrapped with film on all four sides enters the conveying mechanism 5; the conveying mechanism 5 pushes the rectangular parallelepiped grass bale to the film wrapping machine The conveying mechanism conveys the straw bale into a position suitable for the wrapping mechanism 6 to work, and the conveying mechanism stops operating; the wrapping mechanism 6 starts working, wrapping the rectangular straw bale with stretch film on all sides in the horizontal plane, and finally sealing the rectangular straw bale tightly; finally, the pushing cylinder of the conveying mechanism continues to push the frame to move toward the end of the walking track. When the frame moves to the end, a set of pulleys at the front end rolls downward along the walking track 51, and the entire frame is in a state of tilting toward the end. The sealed rectangular material bale will automatically slide to the ground, completing the baling, wrapping and sealing operations.

[0054] Application Example 2

[0055] This application example is another application of the wrapping device, which is used in a fully automatic hydraulic baler for hay. It is used to harvest dry straw or forage that does not require sealed storage. It can realize automated operation and does not require manual assistance in wrapping the net or bagging.

[0056] The difference between this application example and application example 1 is that the conveying mechanism 5 and the film wrapping mechanism 6 are not included, and the stretch film is replaced with a wrapping net, which is mounted on the mounting frame. The structure is as follows: Figure 8 When used for baling dry straw, the straw is picked up from the ground by the picking and throwing mechanism 2 and thrown to the compression mechanism 3. Inside the compression mechanism 3, the straw is pushed into the compression chamber by the feed cylinder 31. The compression cylinder 32 compresses the straw to a set density and then the discharge cylinder 33 pushes the straw out of the discharge pipe in the shape of a rectangular parallelepiped. As the compressed rectangular straw is pushed out of the discharge pipe, the film wrapping device 4 wraps the wrapping net around the vertical surface of the rectangular straw.

Claims

1. A film wrapping device, characterized in that: The invention comprises a film wrapping mechanism (43) vertically arranged on a frame and through which the material to be packaged passes horizontally from the center, a mounting frame for assembling a stretch film (42) assembly is horizontally arranged on one side of the film wrapping mechanism (43), and a film cutting mechanism (41) for cutting the stretch film is arranged above the frame at the discharge end of the film wrapping mechanism through a column (11) perpendicular to the frame; the film wrapping mechanism (43) rotates in a vertical plane relative to the frame to wrap the material to be packaged; The film cutting mechanism (41) includes an L-shaped base (411) vertically fixedly arranged on the front and rear side columns of the frame, a knife (414) for hooking the stretch film is rotatably arranged on the horizontal plate of the base, and a fixed knife (416) for cooperating with the knife for cutting the stretch film (42) and a driving mechanism for driving the knife to rotate are also fixedly arranged on the horizontal plate of the base; the driving mechanism includes a motor (413) and a reduction gearbox connected to the shaft, the reduction gearbox and the motor are mounted above the horizontal plate on the base through a motor base (412), and the reduction gearbox passes through the bottom end of the output shaft of the motor base and is fixedly connected to one end of the knife; The fixed knife (416) is fixed to the base via two positioning columns perpendicular to the horizontal plate of the base, and a film pressing plate (415) for pressing the film between the knife and the fixed knife is sleeved on the positioning column above the fixed knife; a compression spring (417) is sleeved on the positioning column above the film pressing plate, and the top end of the positioning column is limited by a matching nut to limit the compression spring; An elastic material is bonded under the lamination plate (415).

2. A film wrapping device according to claim 1, characterized in that: The film wrapping mechanism (43) includes a fixed ring assembly (433) fixedly connected to the frame and a movable ring assembly (431) rotating in a vertical plane relative to the fixed ring assembly, an inner gear ring (432) fixedly provided on one side of the movable ring assembly, a hydraulic motor (436) for driving the inner gear ring and the movable ring assembly to rotate is horizontally provided on the fixed ring assembly, and an output shaft end of the hydraulic motor is connected to a driving gear meshing with the inner gear ring; a mounting frame for mounting the stretch film assembly is horizontally provided on the discharge side of the movable ring assembly.

3. A film wrapping device according to claim 2, characterized in that: The moving coil assembly (431) is sleeved on the outer circumferential side of the fixed coil assembly (433), and a plurality of rollers (434) for limiting the moving coil assembly are evenly distributed on the circumferential side of the fixed coil assembly.

4. A film wrapping device according to claim 3, characterized in that: A plurality of fixing brackets (435) for assembling a housing for discharging the material to be packaged are evenly distributed on the inner wall of the fixed ring assembly (433).

5. Fully automatic hydraulic baling and wrapping machine, characterized by: The wrapping device comprises the film wrapping device according to any one of claims 1 to 4, and the film wrapping device and the film wrapping machine share a frame; the film wrapping machine further comprises a picking and throwing mechanism (2) arranged on the frame from left to right for picking up and crushing the grass, a compression mechanism (3) for compressing the crushed grass into shape, a conveying mechanism (5) for conveying the formed grass, and a film wrapping mechanism (6) for performing horizontal circumferential film wrapping on the formed grass; the film wrapping device (4) is installed between the compression mechanism (3) and the conveying mechanism (5) and is used for performing film wrapping operations on the formed grass in a vertical plane; The compression mechanism (3) includes a vertically arranged receiving hopper and a compression hopper and a horizontally arranged discharge pipe, the top of the receiving hopper is connected to the throwing port of the picking and throwing mechanism (2), the bottom of the receiving hopper is connected to the middle of the compression hopper, the bottom of the compression hopper is connected to one end of the discharge pipe, the outer end of the discharge pipe is fixedly connected to the film wrapping device, and the discharge pipe and the film wrapping mechanism of the film wrapping device are arranged coaxially; a feed cylinder (31) for pushing grass into the compression hopper is provided on the inner wall of the receiving hopper, a compression cylinder (32) for compressing the grass into shape is provided above the compression hopper, and a discharge cylinder (33) for pushing the compressed grass into the discharge pipe is provided on the inner side wall of the compression hopper; During the wrapping process, one-third of the width of the stretch film is wrapped around the formed straw, and two-thirds of the width of the stretch film is wrapped around the outer wall of the discharge pipe.

6. The fully automatic hydraulic baling and wrapping machine according to claim 5, characterized in that: The compression hopper and the discharge pipe are rectangular parallelepiped structures.

7. The fully automatic hydraulic baling and wrapping machine according to claim 5, characterized in that: The conveying mechanism (5) comprises two parallel running rails (51) fixedly arranged on a frame, a frame (54) is slidably mounted between the two running rails (51), a top end of the frame is provided with a plurality of ratchet rollers (52) perpendicular to the running direction of the formed grass material, and a pushing oil cylinder (55) is fixedly arranged on the frame for pushing the frame to move back and forth in the running rails.

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