Film winding device and film winding method

Abstract

The invention belongs to the technical field of packaging machines, and particularly relates to a film winding device and a film winding method. The film winding device comprises a fixing frame, a feeding mechanism, a rolling mechanism and a film winding mechanism, and the feeding mechanism, the rolling mechanism and the film winding mechanism are installed on the fixing frame. The feeding mechanism is arranged on one side of the rolling mechanism and used for conveying the bales to the rolling mechanism; the film winding mechanism is arranged above the rolling mechanism, the film winding mechanism comprises a rotating support arm and film winding structures, the two ends of the rotating support arm are connected with the film winding structures, and the rotating support arm rotates to enable the two film winding structures to wind films on the bales on the rolling mechanism at the same time; the rolling mechanism is used for rolling the bales in the bale film winding process. The film winding structures are arranged at the two ends of the rotary supporting arm, so that the two film winding structures wind a film on a bale on the rolling mechanism at the same time; the efficiency can be improved, the rotating speed requirement is reduced, the vehicle body stability is improved, kinetic energy is saved, and cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of baling machines, and in particular relates to a film wrapping device and a film wrapping method. Background Art

[0002] There are two types of automatic packaging methods for existing balers, namely automatic net wrapping and automatic rope tying. The automatic net wrapping mechanism is installed on the discharge port of the baler, and ties the baling net to the crushed and compressed straw bale, but only ties to the middle of the bale, and the two ends cannot be sealed. The automatic rope wrapping mechanism is an integrated structure with another square bale baler, which is directly installed inside the baler. The rope is tied to the bale during the baling process, but it cannot tie the crushed and compressed straw bale.

[0003] The existing square baler can pick up, crush and bale the straw, but can only automatically wrap the crushed and baled straw with nets or ropes. Due to its slippery characteristics and fermentation storage, the crushed and baled green fodder needs to be sealed and packaged with plastic bags or plastic films. The existing square baler does not have an automatic bagging device or an automatic film wrapping device, and cannot seal and package the crushed and baled straw. It can only be processed by manually putting on plastic bags.

[0004] Chinese patent application: CN116458343A discloses an automatic film wrapping device to perform secondary film wrapping on straw after being wrapped with nets or tied with ropes; however, the application still has the following defects:

[0005] (1) Low wrapping efficiency;

[0006] (2) Poor wrapping uniformity;

[0007] (3) Poor feeding accuracy;

[0008] (4) In order to keep up with the baling speed of the baler itself, it is necessary to wrap the film at a high speed, which not only consumes more power but also causes greater shaking of the body.

[0009] (5) No safety protection.

[0010] In view of this, the present invention is proposed. Summary of the invention

[0011] In order to solve the technical problems existing in the prior art, the present invention provides a film wrapping device and a film wrapping method. The present invention provides film wrapping structures at both ends of a rotating support arm, so that two film wrapping structures can wrap the straw bales on the rolling mechanism at the same time; while improving efficiency, the rotation speed requirement is reduced, the vehicle body stability is improved, kinetic energy is saved, and costs are reduced.

[0012] The present invention includes the following technical solutions:

[0013] A first aspect of the present invention provides a film wrapping device, comprising a fixed frame and a feeding mechanism, a rolling mechanism and a film wrapping mechanism installed on the fixed frame;

[0014] The feeding mechanism is arranged on one side of the rolling mechanism and is used to feed the straw bale to the rolling mechanism;

[0015] The film wrapping mechanism is arranged above the rolling mechanism, and comprises a rotating arm and a film wrapping structure, both ends of the rotating arm are connected with the film wrapping structure, and the rotating arm rotates so that the two film wrapping structures wrap the straw bale on the rolling mechanism at the same time;

[0016] The rolling mechanism is used for rolling the straw bale during the straw bale wrapping process.

[0017] Furthermore, the rotating support arm includes a first vertical portion, a second vertical portion and a transverse portion, the two ends of the transverse portion are respectively fixedly connected to the upper ends of the first vertical portion and the second vertical portion, and the lower ends of the first vertical portion and the second vertical portion are both used to set the wrapping structure; the first vertical portion and the second vertical portion rotate around the center of the transverse portion.

[0018] Furthermore, the film wrapping mechanism also includes a rotary motor and a support frame, the lower end of the support frame is fixedly connected to the fixed frame, the upper end of the support frame is fixedly connected to the rotary motor, and the output shaft of the rotary motor is fixedly connected to the transverse part.

[0019] Furthermore, the feeding mechanism includes a flipping structure, a flipping cylinder and a clamping structure, the flipping structure is rotatably connected to the fixed frame, and the flipping structure is located on one side of the rolling mechanism, the lower part of the flipping structure is fixedly connected to the flipping cylinder, and the flipping cylinder drives the flipping structure to flip and send the straw bale to the rolling mechanism; the clamping structure is used to clamp the straw bale on the flipping frame.

[0020] Furthermore, the flip structure includes a feeding platform and a flip frame, one end of the flip frame is rotatably connected to the fixed frame and the other end is fixedly connected to the feeding platform, and the bottom of the flip frame is fixedly connected to the telescopic end of the flip cylinder.

[0021] Furthermore, the clamping structure includes a first clamping piece, a second clamping piece and a clamping cylinder, the middle parts of the first clamping piece and the second clamping piece are rotatably connected to the opposite sides of the feeding platform, the lower ends of the first clamping piece and the second clamping piece are rotatably connected to the two ends of the clamping cylinder, and the clamping cylinder is extended so that the upper ends of the first clamping piece and the second clamping piece clamp the bale on the feeding platform.

[0022] Furthermore, the clamping structure further comprises a first connecting rod, a second connecting rod and a third connecting rod; located below the feeding platform, the first clamping member is rotatably connected to one end of the first connecting rod, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, the other end of the second connecting rod is rotatably connected to one end of the third connecting rod, and the other end of the third connecting rod is rotatably connected to the second clamping member;

[0023] The middle portion of the second connecting rod is rotatably connected to a boss arranged at the bottom of the feeding platform.

[0024] Furthermore, the tumbling mechanism comprises a first rotating frame, a second rotating frame, a turning roller and an adjustment structure; along the feeding direction of the feeding mechanism, one end of the two first rotating frames are respectively rotatably connected to the opposite sides of the fixed frame, the other ends of the two first rotating frames are respectively rotatably connected to one end of the two second rotating frames, and the tops of the two second rotating frames are rotatably connected to two turning rollers, and the axial directions of the four turning rollers are perpendicular to the feeding direction;

[0025] In the axial direction of the turning roller, the adjusting structure is connected below the first rotating frame, and the adjusting structure drives and adjusts the position of the second rotating frame.

[0026] Furthermore, the surface of the turning roller is provided with a protrusion extending along the axial direction of the turning roller.

[0027] A second aspect of the present invention provides a film wrapping method, which is implemented based on the above-mentioned film wrapping device, and the film wrapping method comprises the following steps:

[0028] The overlap width of the film wrapped around the bale is controlled by controlling the bale rotation speed.

[0029] By adopting the above technical solution, the present invention has the following advantages:

[0030] 1. The present invention has wrapping structures at both ends of the rotating support arm, so that the two wrapping structures can wrap the straw bales on the rolling mechanism at the same time; while improving efficiency, it can reduce the speed requirement, improve the stability of the vehicle body, save kinetic energy and reduce costs.

[0031] 2. The bag clamping structure provided in the feeding mechanism of the present invention can fix the straw bale when the straw bale is fed to the rolling mechanism, thereby preventing the straw bale from falling or shifting during the transmission, resulting in poor feeding accuracy; it has the advantage of improving feeding accuracy.

[0032] 3. The film wrapping method of the present invention controls the overlap width of the film wrapped around the straw bale by controlling the ratio of the rotation speed of the rotating arm and the rotation speed of the straw bale, which has the advantage of improving the uniformity of film wrapping.

[0033] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the structure of a film wrapping device in an embodiment of the present invention Figure 1 ;

[0036] Figure 2 A schematic diagram of the structure of a film wrapping device in an embodiment of the present invention Figure 2 ;

[0037] Figure 3 A schematic diagram of the structure of a film wrapping device in an embodiment of the present invention Figure 3 ;

[0038] Figure 4 A schematic diagram of the structure of a film wrapping device in an embodiment of the present invention Figure 4 ;

[0039] Figure 5 A schematic diagram of the structure of a film wrapping device in an embodiment of the present invention Figure 5 ;

[0040] Figure 6 The structure of the cutting mechanism in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0041] Figure 7 The structure of the cutting mechanism in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0042] Figure 8 The structure of the cutting mechanism in the embodiment of the present invention is shown in FIG. Figure 3 ;

[0043] Fig. 9 It is a structural schematic diagram of a tumbling mechanism in an embodiment of the present invention;

[0044] Fig.10 A schematic diagram of the structure of a film wrapping device in an embodiment of the present invention Figure 6 ;

[0045] Fig.11 for Fig.10 Schematic diagram of the local structure;

[0046] Fig.12 A schematic diagram of the structure of a film wrapping device in an embodiment of the present invention Figure 7 ;

[0047] Fig.13 It is a structural schematic diagram of a film wrapping mechanism in an embodiment of the present invention;

[0048] Fig.14 It is a partial structural schematic diagram of the film wrapping mechanism in an embodiment of the present invention;

[0049] In the figure, 10-fixed frame, 20-feeding mechanism, 21-turning structure, 211-feeding table, 212-turning frame, 213-receiving cylinder, 22-turning cylinder, 23-clamping structure, 231-first clamping member, 232-second clamping member, 233-clamping cylinder, 234-first connecting rod, 235-second connecting rod, 236-third connecting rod, 30-turning mechanism, 31-first rotating frame, 32-second rotating frame, 33-turning roller, 331-protrusion, 35-adjusting structure, 3 7-hydraulic motor, 40-film wrapping mechanism, 41-rotating support arm, 411-first vertical part, 412-second vertical part, 413-lateral part, 42-rotating motor, 43-support frame, 44-film wrapping structure, 441-film rolling, 442-opening member, 34-cutting mechanism, 341-connecting frame, 342-fixing plate, 343-first oil cylinder, 344-fourth connecting rod, 345-fifth connecting rod, 346-sixth connecting rod, 347-seventh connecting rod, 348-cutter, 60-guardrail. DETAILED DESCRIPTION

[0050] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In a first aspect, the present embodiment provides a film wrapping device, such as Figure 1 , Figure 2 As shown, it includes a fixed frame 10 and a feeding mechanism 20, a rolling mechanism 30 and a film wrapping mechanism 40 installed on the fixed frame 10;

[0053] The feeding mechanism 20 is arranged on one side of the rolling mechanism 30 and is used to feed the straw bale to the rolling mechanism 30;

[0054] The film wrapping mechanism 40 is arranged above the rolling mechanism 30, and comprises a rotating arm 41 and a film wrapping structure 44. Both ends of the rotating arm 41 are connected to the film wrapping structure 44. The rotating arm 41 rotates so that the two film wrapping structures 44 wrap the straw bale on the rolling mechanism 30 at the same time.

[0055] The rolling mechanism 30 is used to roll the straw bale during the process of wrapping the straw bale, so as to realize the self-rotation of the straw bale. During the wrapping process, the straw bale rotates simultaneously, which has the advantage of further improving the uniformity of wrapping.

[0056] In some embodiments, Figure 2 As shown, the rotating arm 41 includes a first vertical portion 411, a first vertical portion 412 and a transverse portion 413, the two ends of the transverse portion 413 are respectively fixedly connected to the upper ends of the first vertical portion 411 and the first vertical portion 412, the lower ends of the first vertical portion 411 and the first vertical portion 412 are used to set the film wrapping structure 44; the first vertical portion 411 and the first vertical portion 412 rotate around the center of the transverse portion 413. The rotating arm 41 configured in this way can ensure the uniformity of the film wrapping of the two film wrapping structures 44 on the one hand, and also play a role in better driving the rotating arm 41 on the other hand.

[0057] In some embodiments, Figure 1 , Figure 2 As shown, the film wrapping mechanism 40 further includes a rotary motor 42 and a support frame 43, the lower end of the support frame 43 is fixedly connected to the fixed frame 10, the upper end of the support frame 43 is fixedly connected to the rotary motor 42, and the output shaft of the rotary motor 42 is fixedly connected to the transverse portion 413; the rotary motor 42 drives the transverse portion 413 to rotate. The rotary motor 42 controls the rotation of the rotary arm 41, and the width of the film wrapping overlap can be controlled by controlling the rotation speed of the rotary arm 41; this can adapt to the film wrapping of bales of different sizes, can ensure the uniformity and aesthetics of the film wrapping of bales of different sizes, and has the advantage of reducing costs.

[0058] Preferably, the rotary motor 42 is a single-stage sprocket reducer, which has less power loss and is more fuel-efficient than a three-stage gear reducer.

[0059] In some embodiments, Figure 1As shown, the feeding mechanism 20 includes a flipping structure 21, a flipping cylinder 22 and a clamping structure 23. The flipping structure 21 is rotatably connected to the fixed frame 10, and the flipping structure 21 is located on one side of the rolling mechanism 30. The lower part of the flipping structure 21 is fixedly connected to the flipping cylinder 22. The flipping cylinder 22 drives the flipping structure 21 to flip and send the straw bale to the rolling mechanism 30; the clamping structure 23 is used to clamp the straw bale on the flipping frame 212.

[0060] In some embodiments, Figure 3 As shown, the flip structure 21 includes a feeding platform 211 and a flip frame 212. One end of the flip frame 212 is rotatably connected to the fixed frame 10 and the other end is fixedly connected to the feeding platform 211. The bottom of the flip frame 212 is fixedly connected to the telescopic end of the flip cylinder 22.

[0061] In some embodiments, Figure 4 As shown in the figure, the clamping structure 23 includes a first clamping member 231, a second clamping member 232 and a clamping cylinder 233, the middle parts of the first clamping member 231 and the second clamping member 232 are rotatably connected to the opposite sides of the feeding platform 211, the lower ends of the first clamping member 231 and the second clamping member 232 are rotatably connected to the two ends of the clamping cylinder 233, and the clamping cylinder 233 is extended so that the upper ends of the first clamping member 231 and the second clamping member 232 clamp the bale on the feeding platform 211.

[0062] In some embodiments, Figure 4 As shown, the turning frame 212 is configured as a rectangle, the four sides of the rectangular turning frame 212 are all rotatably connected, and a material receiving cylinder 213 is connected between two opposite sides of the rectangular turning frame 212; thus, the rectangular turning frame 212 can be driven to rotate by the material receiving cylinder 213, so that the feeding table 211 can take materials.

[0063] In some embodiments, Figure 4 As shown, the clamping structure 23 further includes a first connecting rod 234, a second connecting rod 235 and a third connecting rod 236; located below the feeding platform 211, the first clamping member 231 is rotatably connected to one end of the first connecting rod 234, the other end of the first connecting rod 234 is rotatably connected to one end of the second connecting rod 235, the other end of the second connecting rod 235 is rotatably connected to one end of the third connecting rod 236, and the other end of the third connecting rod 236 is rotatably connected to the second clamping member 232;

[0064] The middle portion of the second connecting rod 235 is rotatably connected to a boss disposed at the bottom of the feeding platform 211 .

[0065] In some embodiments, Figure 3 , Figure 4 , Figure 5As shown, the rolling mechanism 30 includes a first rotating frame 31, a second rotating frame 32, a turning roller 33 and an adjustment structure 5; along the feeding direction of the feeding structure, one end of the two first rotating frames 31 are respectively connected to the opposite sides of the fixed frame 10, and the other ends of the two first rotating frames 31 are respectively connected to one end of the two second rotating frames 32, and the upper parts of the two second rotating frames 32 are both connected to two turning rollers 33, and the axial directions of the four turning rollers 33 are perpendicular to the feeding direction, and the turning rollers 33 are driven to rotate by the turning structure;

[0066] In the axial direction of the turning roller 33 , the adjusting structure 5 is connected below the first rotating frame 31 , and the adjusting structure 5 drives and adjusts the position of the second rotating frame 32 .

[0067] In some embodiments, the turning roller 33 is driven to rotate by a hydraulic motor 37. Preferably, the turning rollers 33 connected to the same second rotating frame 32 are driven by a hydraulic motor 37. In this way, the rotation speeds of the two turning rollers 33 can be ensured to be the same. Specifically, it can be achieved through a sprocket, where the ends of the two turning rollers 33 are connected to gears, and the gears are connected by a chain, so that one hydraulic motor 37 can drive the two turning rollers 33 to rotate.

[0068] In some embodiments, Figure 4 As shown, the adjustment structure includes a second oil cylinder.

[0069] In some embodiments, Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, it also includes a cutting mechanism 34, which is used to cut the film; the cutting mechanism 34 includes a connecting frame 341, a fixed plate 342, a first cylinder 343, a fourth connecting rod 344, a fifth connecting rod 345, a sixth connecting rod 346, a seventh connecting rod 347 and a cutter 348, at least the first cylinder 343, the fourth connecting rod 344, the fifth connecting rod 345, and the sixth connecting rod 346 are arranged between two fixed plates 342, and the two fixed plates 342 limit the freedom of the first cylinder 343, the fourth connecting rod 344, the fifth connecting rod 345, and the sixth connecting rod 346 toward the fixed plate 342; one of the fixed plates 342 is fixedly connected to the connecting frame 341, and the connecting frame 341 is fixedly connected to the fixed frame 10.

[0070] Combination Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, one end of the first oil cylinder 343 is rotatably connected to the fixed plate 342, and the other end is rotatably connected to one end of the fourth connecting rod 344, the other end of the fourth connecting rod 344 is rotatably connected to one end of the fifth connecting rod 345, and the other end of the fifth connecting rod 345 is rotatably connected to the middle of the seventh connecting rod 347; one end of the seventh connecting rod 347 is rotatably connected to one end of the sixth connecting rod 346, and the other end of the sixth connecting rod 346 is rotatably connected to the fixed plate 342 and located above the first oil cylinder 343; the other end of the seventh connecting rod 347 is rotatably connected to one end of the cutter 348; the fourth connecting rod 344 is rotatably connected to the sixth connecting rod 346 through a rotating shaft. The fifth connecting rod 345 and the sixth connecting rod 346 are also matched through a concave-convex structure, and the cutter 348 is slidably connected to the fifth connecting rod 345, and its sliding direction is the axial direction of the cutter 348.

[0071] During cutting, the first oil cylinder 343 drives the lifting cutter 348 to cut the film; after the cutter 348 cuts the film, the joint of the film falls on the cutter 348; when starting the film wrapping, the first oil cylinder 343 drives the lifting cutter 348 to wrap the film around the straw bale.

[0072] In some embodiments, the cutting mechanism may include a robotic arm and a cutter; the robotic arm drives the cutter to cut; preferably, two cutting mechanisms are provided to cut the films on the two wrapping structures respectively.

[0073] In some embodiments, Fig.10 , Fig.11 As shown, the surface of the turning roller 33 is provided with a protrusion 331 extending along the axial direction of the turning roller 33. This can prevent the straw bale from slipping during the film wrapping process, which can not only improve the film wrapping efficiency, but also further ensure the uniformity of the film wrapping.

[0074] In some embodiments, Fig.12 As shown, a guardrail 60 is also provided, which can increase safety and prevent injuries.

[0075] In some embodiments, the film wrapping device of this embodiment is fixedly connected to the baler through a fixing frame; the baler first performs baling, and after baling is completed, the feeding structure 20 receives the bales and sends the completed bales to the rolling mechanism 30 for film wrapping.

[0076] When the film wrapping device of this embodiment is applied to a baler, the receiving structure 20 needs to receive the bale, and the position of the feeding platform 211 needs to ensure that the material can be received. In order to improve the film wrapping efficiency, a structure such as a film wrapping structure 44 is connected to both ends of the rotating arm 41. The rotation of the rotating arm 41 requires a larger space, so the distance between the feeding platform 211 and the rotating arm 41 is increased. Since the feeding mechanism 20 of this embodiment wraps the film at both ends of the rotating arm 41 at the same time, the rotation space of the rotating arm 41 is also increased, which makes it more difficult to feed accurately. The feeding mechanism 20 of this embodiment can ensure accurate feeding when the film wrapping device is applied to the baler.

[0077] In some embodiments, Fig.13 , Fig.14 As shown, the film wrapping structure 44 includes a film roll 441 and an opening piece 442, and the film roll 441 is rotatably connected to the rotating support arm 41; in the figure, the opening piece 442 is also rotatably connected to the rotating support arm 41, and a spring is connected between the opening piece 442 and the film roll 441; the film on the film roll passes through the two rotating rods of the tensioning member, and the upper and lower ends of the two rotating rods are provided with textures, so that the film can be ensured to be always open; it has the advantage of improving the uniformity of film wrapping.

[0078] A second aspect of the present invention provides a film wrapping method, which is implemented based on the above-mentioned film wrapping device, and the film wrapping method comprises the following steps:

[0079] The overlap width of the film wrapped around the bale is controlled by controlling the bale rotation speed.

[0080] The ratio of the bale rotation speed (controlled by the rotation of the turning roller 33) to the film wrapping speed (the rotation speed of the rotating arm 41) can be freely adjusted, so that the overlap width between the films can be adjusted; that is, the speed of the rotating arm 41 remains unchanged, and the bale rotation speed is adjusted. When the bale rotation speed increases, the overlap width between the films becomes smaller, and when the bale rotation speed decreases, the overlap width between the films becomes larger.

[0081] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0082] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of multiple components or the interaction relationship of multiple components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the description of the present invention, it should be understood that all terms used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation on the present invention.

[0084] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A film wrapping device, characterized in that: It comprises a fixed frame (10) and a feeding mechanism (20), a rolling mechanism (30) and a film wrapping mechanism (40) installed on the fixed frame (10); The feeding mechanism (20) is arranged on one side of the rolling mechanism (30) and is used to feed the straw bale to the rolling mechanism (30); The film wrapping mechanism (40) is arranged above the rolling mechanism (30), and comprises a rotating arm (41) and a film wrapping structure (44). Both ends of the rotating arm (41) are connected to the film wrapping structures (44). The rotating arm (41) rotates so that the two film wrapping structures (44) wrap the straw bales on the rolling mechanism (30) at the same time. The rolling mechanism (30) is used for rolling the straw bale during the straw bale wrapping process.

2. A film wrapping device according to claim 1, characterized in that: The rotating support arm (41) comprises a first vertical portion (411), a second vertical portion (412) and a transverse portion (413); two ends of the transverse portion (413) are respectively fixedly connected to the upper ends of the first vertical portion (411) and the second vertical portion (412); the lower ends of the first vertical portion (411) and the second vertical portion (412) are used to set the film wrapping structure (44); the first vertical portion (411) and the second vertical portion (412) rotate around the center of the transverse portion (413).

3. A film wrapping device according to claim 2, characterized in that: The film wrapping mechanism (40) further comprises a rotating motor (42) and a supporting frame (43), wherein the lower end of the supporting frame (43) is fixedly connected to the fixing frame (10), the upper end of the supporting frame (43) is fixedly connected to the rotating motor (42), and the output shaft of the rotating motor (42) is fixedly connected to the transverse portion (413).

4. A film wrapping device according to any one of claims 1 to 3, characterized in that: The feeding mechanism (20) comprises a turning structure (21), a turning cylinder (22) and a clamping structure (23); the turning structure (21) is rotatably connected to the fixed frame (10), and the turning structure (21) is located on one side of the rolling mechanism (30); the lower part of the turning structure (21) is fixedly connected to the turning cylinder (22); the turning cylinder (22) drives the turning structure (21) to turn over and deliver the straw bale to the rolling mechanism (30); the clamping structure (23) is used to clamp the straw bale on the turning frame (212).

5. A film wrapping device according to claim 4, characterized in that: The turning structure (21) comprises a feeding platform (211) and a turning frame (212); one end of the turning frame (212) is rotatably connected to the fixed frame (10) and the other end is fixedly connected to the feeding platform (211); the bottom of the turning frame (212) is fixedly connected to the telescopic end of the turning cylinder (22).

6. A film wrapping device according to claim 5, characterized in that: The clamping structure (23) comprises a first clamping member (231), a second clamping member (232) and a clamping oil cylinder (233); the middle parts of the first clamping member (231) and the second clamping member (232) are rotatably connected to the opposite sides of the feeding platform (211); the lower ends of the first clamping member (231) and the second clamping member (232) are rotatably connected to the two ends of the clamping oil cylinder (233); the clamping oil cylinder (233) is extended so that the upper ends of the first clamping member (231) and the second clamping member (232) clamp the straw bale on the feeding platform (211).

7. A film wrapping device according to claim 6, characterized in that: The clamping structure (23) further comprises a first connecting rod (234), a second connecting rod (235) and a third connecting rod (236); the first clamping member (231) is rotatably connected to one end of the first connecting rod (234), the other end of the first connecting rod (234) is rotatably connected to one end of the second connecting rod (235), the other end of the second connecting rod (235) is rotatably connected to one end of the third connecting rod (236), and the other end of the third connecting rod (236) is rotatably connected to the second clamping member (232); The middle portion of the second connecting rod (235) is rotatably connected to a boss arranged at the bottom of the feeding platform (211).

8. A film wrapping device according to any one of claims 1 to 3, characterized in that: The rolling mechanism (30) comprises a first rotating frame (31), a second rotating frame (32), a turning roller (33) and an adjustment structure (35); along the feeding direction of the feeding mechanism (20), one end of the two first rotating frames (31) are respectively rotatably connected to the opposite sides of the fixed frame (10), the other ends of the two first rotating frames (31) are respectively connected to one end of the two second rotating frames (32), and the tops of the two second rotating frames (32) are both rotatably connected to two turning rollers (33), and the axial directions of the four turning rollers (33) are perpendicular to the feeding direction; In the axial direction of the turning roller (33), the adjustment structure (35) is connected below the first rotating frame (31), and the adjustment structure (35) drives and adjusts the position of the second rotating frame (32).

9. A film wrapping device according to claim 8, characterized in that: The surface of the turning roller (33) is provided with a protrusion (331) extending along the axial direction of the turning roller (33).

10. A film wrapping method, characterized in that: The film wrapping device according to any one of claims 1 to 9 is implemented, and the film wrapping method comprises the following steps: The overlap width of the film wrapped around the bale is controlled by controlling the bale rotation speed.

Images