Agricultural planting and seedling raising greenhouse film winding and unwinding device

Abstract

The application discloses an agricultural planting and seedling raising greenhouse film winding and unwinding device and relates to the technical field of agricultural greenhouses. The device comprises fixing plates, arc-shaped support frames, arc-shaped sleeves, winding rollers, driving assemblies, winding linkage assemblies and film fixed ends, which are arranged on one of the fixing plates and used for fixing the unwinding ends of the films. The device further comprises pressing assemblies arranged on the other side of the greenhouse and used for pressing the surfaces of the films after the films are laid. In the application, the first gear is driven by a servo motor to mesh with the first arc-shaped gear rack, so that the arc-shaped sleeve is automatically slid along the greenhouse contour. Meanwhile, the second gear is linked with the second arc-shaped gear rack to automatically complete the winding and unwinding of the films by the winding rollers during the sliding process. The device completely replaces the traditional operation mode of manually pulling the films by multiple persons, greatly reduces the required number of workers and lowers the labor intensity.

Description

Technical Field

[0001] This invention relates to the field of agricultural greenhouse technology, specifically to a film loading and unloading device for agricultural planting and seedling cultivation greenhouses. Background Technology

[0002] Agricultural greenhouses, or simply greenhouses, are enclosed or semi-enclosed agricultural buildings that provide controlled growing conditions for crops in unsuitable climatic environments. These facilities have functions such as light transmission, heat preservation (or heating), and rain protection.

[0003] Existing agricultural seedling greenhouses typically require a plastic film to be laid on the surface for insulation. The laying of the film and daily ventilation and insulation operations mainly rely on manual methods for opening and closing. Specifically, multiple workers are usually needed to pull the edges of the film and work together to cover or remove it from the greenhouse surface. This purely manual method has the following drawbacks:

[0004] On the one hand, multi-person collaborative operation leads to high labor costs and high labor intensity; on the other hand, due to the lack of a mechanical transmission mechanism, when ventilation or insulation is needed due to sudden climate changes, the opening or closing of the film cannot be completed quickly, resulting in a slow response and affecting the growth of crops inside the greenhouse. Therefore, there is an urgent need for a greenhouse film opening and closing device that can reduce manual labor intensity and achieve rapid film opening and closing. Summary of the Invention

[0005] The purpose of this invention is to provide a film loading and unloading device for agricultural planting and seedling greenhouses, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a film-laying and unlaying device for agricultural seedling greenhouses, comprising:

[0007] Fixed plates are installed on both sides of the greenhouse width.

[0008] An arc-shaped support frame, with its two ends fixed to the two fixed plates respectively, is located on the outside of the greenhouse, and its outline matches the outline of the greenhouse.

[0009] An arc-shaped sleeve is fitted onto the arc-shaped support frame and can slide freely around the center of the arc of the arc-shaped support frame;

[0010] A winding roller, rotatably connected to the arc-shaped sleeve, is used for winding the film;

[0011] A driving component is disposed between the arc-shaped sleeve and the arc-shaped support frame, for driving the arc-shaped sleeve to slide along the arc-shaped support frame;

[0012] A winding linkage assembly is disposed between the arc-shaped sleeve, the winding roller and the arc-shaped support frame, and is used to drive the winding roller to rotate to wind up or unwind the film when the arc-shaped sleeve slides.

[0013] A film fixing end is disposed on one of the fixing plates and is used to fix the unwinding end of the film;

[0014] The pressing component, located on the other side of the greenhouse, is used to press the film surface firmly after the film is laid.

[0015] Furthermore, the driving component includes:

[0016] The first arc-shaped rack is fixedly embedded in the outer periphery of the arc-shaped support frame;

[0017] A servo motor is horizontally mounted on a motor support on the upper side wall of the arc-shaped sleeve;

[0018] The first gear is fixedly sleeved on the motor shaft of the servo motor;

[0019] The wall of the arc-shaped sleeve is provided with a first clearance groove through which the first gear passes. The first gear passes through the first clearance groove and meshes with the first arc-shaped rack for transmission.

[0020] Furthermore, the winding linkage component includes:

[0021] The second arc-shaped rack is fixedly embedded in the inner periphery of the arc-shaped support frame;

[0022] The support arm is fixed to the wall of the arc-shaped sleeve and extends downward, and the winding roller is rotatably connected between the two support arms of the arc-shaped sleeve through the installation bearing;

[0023] The second gear is coaxially fixed to both ends of the winding roller;

[0024] The wall of the arc-shaped sleeve is provided with a second clearance groove through which the second gear passes. The second gear passes through the second clearance groove and meshes with the second arc-shaped rack for transmission.

[0025] Furthermore, the film fixing end includes:

[0026] A strip clamp is fixed to the upward-facing side of one of the fixing plates, and the upward-facing side of the strip clamp has a clamping groove for engaging the end of the film;

[0027] Multiple fastening bolts are installed on the strip clamp to clamp and fix the film in the clamping groove.

[0028] Furthermore, the clamping assembly includes:

[0029] Multiple pressure strips are provided and are evenly spaced along the length of the greenhouse. One end of each pressure strip is fixed to a fixed plate with the strip clamp, and the other end passes around the winding roller and extends to another fixed plate. The pressure strip passes through the winding roller and the connecting rod and has elastic deformation capability.

[0030] A rotating roller is horizontally rotatably connected to a fixed plate away from the strip clamping plate. The end of the pressure strip away from the strip clamping plate is fixedly connected to the rotating roller. When the rotating roller rotates, it can wind up the pressure strip.

[0031] A linkage pressing part is disposed between the rotating roller and the arc-shaped sleeve, and is used to drive the rotating roller to rotate so that the pressure strip tightens and presses the film when the arc-shaped sleeve slides to the end point.

[0032] Furthermore, the linkage clamping part includes:

[0033] The actuating arm is fixed to both ends of the rotating roller in the axial direction and extends toward the arc-shaped support frame;

[0034] The actuating block is fixed to the end of the arc-shaped sleeve;

[0035] When the arc-shaped sleeve slides on the arc-shaped support frame toward the rotating roller, the actuating block can squeeze the actuating arm, causing the actuating arm to drive the rotating roller to rotate downwards.

[0036] Furthermore, the linkage clamping part also includes an adaptive extrusion structure, the adaptive extrusion structure comprising:

[0037] A retaining ring is fixedly sleeved around the periphery of the rotating roller;

[0038] A hollow cylinder is fixed to the periphery of the fixing ring and extends radially outward. The hollow cylinder is hollow inside and has one end open.

[0039] A sliding rod is inserted and installed in the inner cavity of the hollow cylinder and can slide freely along the axial direction;

[0040] A toggle part is fixedly connected to one end of the sliding rod that protrudes from the hollow cylinder. The axial direction of the toggle part is perpendicular to the axial direction of the sliding rod, and each toggle part corresponds to one pressure strip.

[0041] When the rotating roller rotates downwards, it drives the hollow cylinder and the actuating part to swing towards the greenhouse, causing the actuating part to press the surface of the pressure strip.

[0042] Furthermore, the adaptive extrusion structure also includes:

[0043] A tension spring is installed in the inner cavity of the hollow cylinder. The two ends of the tension spring are respectively fixedly connected to the end face of the sliding rod and the inner wall of the hollow cylinder. Under normal conditions, the tension spring exerts a pulling force on the sliding rod to move towards the fixed ring.

[0044] A sliding pin is fixedly connected to one end of the sliding rod that passes through the inner cavity of the hollow cylinder;

[0045] An oblong hole is formed on the wall of the hollow cylinder to allow the sliding pin to pass freely. The length direction of the oblong hole is parallel to the axial direction of the hollow cylinder.

[0046] Furthermore, the adaptive extrusion structure also includes:

[0047] The extrusion plate is fixedly attached to the fixed plate on which the rotating roller is provided, and corresponds to the fixed ring;

[0048] An inclined surface is provided on the upper end of the extrusion plate facing the greenhouse;

[0049] When the hollow cylinder swings downwards, the sliding pin slides on the inclined surface and is driven by the thrust of the inclined surface to move the sliding rod and the actuating part toward the pressure bar, so that the actuating part slides from top to bottom on the surface of the pressure bar and the pressing force gradually increases.

[0050] Furthermore, it also includes a connecting rod, which is horizontally fixed between the two arc-shaped sleeves, and the winding roller is parallel to the connecting rod and parallel to the length direction of the greenhouse;

[0051] Connecting arms are welded to both ends of a fixed plate away from the strip clamp along its length. The rotating roller is horizontally rotatably connected between the two connecting arms via a mounting bearing. There is a gap between the connecting arms and the arc-shaped support frame that allows the arc-shaped sleeve to pass freely.

[0052] Compared with the prior art, the beneficial effects of the present invention are:

[0053] 1. Achieve automated take-off and delivery, significantly reducing labor costs and labor intensity.

[0054] This device uses a servo motor to drive a first gear that meshes with a first arc-shaped rack, causing the arc-shaped sleeve to slide automatically along the outline of the greenhouse. Simultaneously, the second gear and the second arc-shaped rack work together to automatically complete the winding and unwinding of the film by the winding roller during the sliding process. This completely replaces the traditional method of manually pulling the film by multiple people, greatly reducing the number of workers required and lowering labor intensity.

[0055] 2. Rapid response, enhancing the ability to cope with sudden climate change.

[0056] Thanks to the use of mechanized and electric transmission, when encountering sudden climate changes (such as a sudden drop in temperature requiring insulation, or a high temperature requiring emergency ventilation), the servo motor can be activated to quickly complete the full covering or retraction of the film. The response time is extremely short, avoiding the adverse effects of slow manual operation on the growth of crops in the greenhouse.

[0057] 3. Simultaneous laying and compaction improve work efficiency and film stability.

[0058] The device innovatively incorporates a pressure strip and a linked clamping mechanism. As the film unwinding and laying nears completion, the movement of the arc-shaped sleeve automatically triggers a lever to press against the lever arm, causing the roller to rotate and tighten the pressure strip. This achieves a seamless transition between film laying and pressure strip tautness. No further manual tightening is required after laying, improving efficiency and ensuring a tight fit of the film on the greenhouse surface, preventing it from being blown away by the wind and avoiding the problem of film curling at the edges if it hasn't been properly tightened immediately after laying.

[0059] 4. Features adaptive progressive clamping, ensuring reliable clamping while protecting the film.

[0060] Through the cooperation of the hollow cylinder, sliding rod, tension spring, sliding pin, and the inclined surface of the extrusion plate, the device achieves "adaptive progressive pressing" when pressing the film: as the rotating roller drives the hollow cylinder to swing downwards, the sliding pin slides on the inclined surface, forcing the actuating part to move from top to bottom on the pressure bar surface and gradually increasing the pressing force. This design not only makes the pressure bar on the film increasingly stronger and more reliable, but also avoids instantaneous rigid impact on the film or pressure bar, providing good protection; at the same time, when the film is wound in reverse, the tension spring can automatically reset, and the movement is smooth and without jamming. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of the overall structure of an agricultural planting and seedling greenhouse film loading and unloading device according to the present invention.

[0062] Figure 2 for Figure 1 A magnified schematic diagram of the positional relationship of a local structure at point A in the middle;

[0063] Figure 3 for Figure 1 A magnified schematic diagram of the positional relationship of the local structure at point B in the middle section;

[0064] Figure 4 for Figure 1 A schematic diagram of the positional relationship of the central structure from a first-person perspective;

[0065] Figure 5 for Figure 1 A schematic diagram of the positional relationship of the middle structure from a second perspective;

[0066] Figure 6 for Figure 5 A magnified schematic diagram of the positional relationship of the local structure at point K;

[0067] Figure 7 This is a schematic diagram showing the positional relationship of the arc-shaped sleeve, connecting rod, and winding roller after assembly in this invention;

[0068] Figure 8 This is a schematic diagram showing the positional relationship of the hollow cylinder, sliding rod, and actuating part after assembly in this invention.

[0069] The following are explanations of the reference numerals in the figures: 1. Strip clamp; 2. Greenhouse; 3. Arc-shaped support frame; 4. Arc-shaped sleeve; 5. Connecting rod; 6. Winding roller; 7. Pressure strip; 8. Rotating roller; 9. Fixing plate; 10. First arc-shaped rack; 11. Second arc-shaped rack; 12. First gear; 13. Servo motor; 14. Second gear; 15. Actuating part; 16. Sliding rod; 17. Hollow cylinder; 18. Inclined surface; 19. Actuating arm; 20. Extrusion plate; 21. Actuating block; 22. Clamping groove; 23. Waist-shaped hole; 24. Sliding pin; 25. Tension spring. Detailed Implementation

[0070] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0071] Please see Figures 1-8 This invention provides a technical solution: an agricultural planting and seedling greenhouse film loading and unloading device, including fixed plates 9 installed on both sides of the greenhouse 2 in the width direction. The two fixed plates 9 can be installed on the ground by expansion bolts, and the length direction of the fixed plates 9 is parallel to the length direction of the greenhouse 2. The two fixed plates 9 are fixedly connected to the two ends of the length direction with an arc-shaped support frame 3. The arc-shaped support frame 3 is located on the outside of the greenhouse 2, and its outline matches the outline of the greenhouse 2. Arc-shaped sleeves 4 are fitted on the two arc-shaped support frames 3. The arc-shaped sleeves 4 and the arc-shaped support frames 3 can slide freely around the arc center of the arc-shaped support frame 3. The outer and inner peripheries of the arc-shaped support frame 3 are respectively fixedly embedded with a first arc-shaped rack 10 and a second arc-shaped rack 11. A motor support is fixedly connected to the upper side wall of the arc-shaped sleeve 4. A servo motor 13 is horizontally installed on the motor support. A connecting rod 5 is horizontally fixed between the two arc-shaped sleeves 4.

[0072] A first gear 12 is fixedly sleeved on the motor shaft of the servo motor 13. A first clearance groove is provided on the wall of the arc sleeve 4 to allow the first gear 12 to pass freely. The first clearance groove is connected to the central hole of the arc sleeve 4. The first gear 12 passes through the first clearance groove and meshes with the first arc rack 10 for transmission. In this way, when the motor shafts of the two servo motors 13 rotate, the first gear 12 will rotate. Then, through the meshing transmission of the first gear 12 and the first arc rack 10, the arc sleeve 4 can be driven to slide on the arc support frame 3. A first slot is provided on the central hole wall of the arc sleeve 4 to allow the first arc rack 10 to pass freely.

[0073] Combination Figures 1 to 8 As shown, and please refer to the following: Figure 2 The arc sleeve 4 has a downwardly extending support arm fixed to its wall. The two support arms on the two arc sleeves 4 are connected to a winding roller 6 by a bearing. The winding roller 6 is parallel to the connecting rod 5 and parallel to the length direction of the greenhouse 2. The two ends of the winding roller 6 are coaxially fixed with a second gear 14. The wall of the arc sleeve 4 is provided with a second clearance groove for the second gear 14 to pass through freely. The second clearance groove is connected to the middle hole of the arc sleeve 4. The second gear 14 passes through the second clearance groove and is meshed with the second arc rack 11. When the motor shaft of the servo motor 13 rotates, the first gear 12 and the first arc rack 10 mesh and drive each other, thereby driving the arc sleeve 4 to slide on the periphery of the arc support frame 3.

[0074] When the arc sleeve 4 slides, it will cause the second gear 14 and the second arc rack 11 to mesh and drive. When meshing and driving, it will drive the winding roller 6 to rotate. One of the fixed plates 9 is fixed to the upward side with a strip clamping plate 1. The upward side of the strip clamping plate 1 is provided with a clamping groove 22. A film is wound on the winding roller 6. The end of the film that is unwound from the winding roller 6 is engaged in the clamping groove 22. The strip clamping plate 1 is provided with multiple fastening bolts (not shown in the figure). The fastening bolts are used to clamp the film so that the film can be fixedly installed in the clamping groove 22. When the arc sleeve 4 slides on the arc support frame 3, it will cause the second gear 14 and the second arc rack 11 to mesh and drive, thereby enabling the film to be wound up and unwound.

[0075] Combination Figures 1 to 8 As shown, and please refer to the following: Figure 3Multiple pressure strips 7 are fixedly attached to a fixed plate 9 with a strip clamp 1. The multiple pressure strips 7 are evenly spaced along the length direction of the greenhouse 2. One end of the pressure strip 7 is fixed to the fixed plate 9 along the length direction, and the other end passes around the winding roller 6 and extends to another fixed plate 9. The pressure strip 7 passes through the winding roller 6 and the connecting rod 5. In addition, the pressure strip 7 is made of high carbon tool steel or manganese steel, which gives it a high elastic deformation capacity. The pressure strip 7 is similar to a measuring tape, so that when the end of the pressure strip 7 away from the strip clamp 1 is pulled, the pressure strip 7 can be tightened. Connecting arms are welded to both ends of the fixed plate 9 away from the strip clamp 1 along the length direction.

[0076] A rotating roller 8 is horizontally rotatably connected between two connecting arms via bearings. The end of the pressure strip 7 away from the strip clamp 1 is fixedly connected to the rotating roller 8, so that the rotating roller 8 can wind up the pressure strip 7 when rotating. There is a certain gap between the connecting arm and the arc support frame 3, so that the arc sleeve 4 can pass freely between the connecting arm and the arc support frame 3. Multiple fixed rings are fixedly sleeved around the periphery of the rotating roller 8. A hollow cylinder 17 extending radially outward from the periphery of the fixed ring is fixedly connected to the periphery of the fixed ring. The hollow cylinder 17 is hollow inside and the end face away from the fixed ring is open. A sliding rod 16 is inserted into the inner cavity of the hollow cylinder 17 and can slide freely along the axial direction of the hollow cylinder 17 in the inner cavity of the hollow cylinder 17.

[0077] Combination Figures 1 to 8 As shown, and please refer to the following: Figure 8 One end of the sliding rod 16 that extends out of the hollow cylinder 17 is fixedly connected to a prying part 15. The axis of the prying part 15 is perpendicular to the axis of the sliding rod 16. In addition, the axis of the prying part 15 is parallel to the length direction of the greenhouse 2. Each prying part 15 corresponds to a pressure strip 7. When the prying part 15 rotates around the axis of the rotating roller 8 toward the greenhouse 2, it will press the surface of the pressure strip 7. A tension spring 25 is installed in the inner cavity of the hollow cylinder 17. The two ends of the tension spring 25 are fixedly connected to the end face of the sliding rod 16 and the inner wall of the hollow cylinder 17, respectively. Under normal conditions, the tension spring 25 has the potential energy to move the sliding rod 16 toward the fixed ring. One end of the sliding rod 16 that extends into the inner cavity of the hollow cylinder 17 is fixedly connected to a sliding pin 24. The wall of the hollow cylinder 17 is provided with an oblong hole 23 for the sliding pin 24 to pass freely. The length direction of the oblong hole 23 is parallel to the axis of the hollow cylinder 17.

[0078] At both ends of the rotating roller 8, a lever arm 19 extending toward the arc-shaped support frame 3 is fixedly connected. At the end of the arc-shaped sleeve 4, a lever block 21 is fixedly connected. When the arc-shaped sleeve 4 slides toward the rotating roller 8 on the arc-shaped support frame 3, the lever block 21 will gradually approach the lever arm 19, so that the lever block 21 can squeeze the lever arm 19, thereby causing the lever arm 19 to drive the rotating roller 8 to rotate downward, and thus causing the hollow cylinder 17 to swing toward the greenhouse 2. A number of extrusion plates 20 are fixedly connected to a fixed plate 9 with a connecting arm. The number of extrusion plates 20 correspond to the number of fixed rings respectively. The upper end of the extrusion plate 20 facing the greenhouse 2 has an inclined surface 18. The inclined surface 18 cooperates with the sliding pin 24, so that when the hollow cylinder 17 swings downward, the sliding pin 24 will slide on the inclined surface 18, and the sliding pin 24 can drive the sliding rod 16 to move toward the greenhouse 2.

[0079] Working principle of the invention:

[0080] When laying the film, the arc sleeve 4 is located on one side of the arc support frame 3 and the strip clamp plate 1. The film is wound on the winding roller 6. The end of the film that is unwound from the winding roller 6 is installed in the clamping groove 22 of the strip clamp plate 1. At the same time, two servo motors 13 are started and the motor shafts of the two servo motors 13 rotate synchronously, which causes the first gear 12 and the first arc rack 10 to mesh and drive, so that the arc sleeve 4 moves on the arc support frame 3 toward the other fixed plate 9. During the movement, the second gear 14 will mesh and drive with the second arc rack 11, which will enable the winding roller 6 to rotate. When the winding roller 6 rotates, the film can be unwound from the winding roller 6 and the unwound film will be laid on the surface of the greenhouse 2.

[0081] Since the rotating roller 8 can rotate freely at this time, the actuating part 15 will not exert pressure on the pressure strip 7, so the pressure strip 7 will not be taut. When the arc-shaped sleeve 4 approaches the actuating arm 19, the arc-shaped sleeve 4 enters between the rotating roller 8 and the arc-shaped support frame 3, thereby causing the actuating block 21 to contact the actuating arm 19. As the arc-shaped sleeve 4 continues to slide, the actuating block 21 presses against the actuating arm 19, thereby causing the actuating arm 19 to swing downward. When the actuating arm 19 swings downward, it will drive the rotating roller 8 to rotate clockwise (see reference). Figure 6 This causes the rotating roller 8 to drive the hollow cylinder 17 to swing, which in turn causes the hollow cylinder 17 to drive the sliding rod 16 and the actuating part 15 to swing towards the greenhouse 2, so that the actuating part 15 contacts the pressure strip 7 and begins to exert pressure on the pressure strip 7, and at this time the pressure strip 7 will not interfere with the winding roller 6.

[0082] As the hollow cylinder 17 rotates, the actuating part 15 presses against the pressure strip 7, causing the pressure strip 7 to tighten and press down on the film already laid on the surface of the greenhouse 2. During the rotation of the hollow cylinder 17, the sliding pin 24 slides on the inclined plane 18 and is pushed by the inclined plane 18, which in turn causes the sliding pin 24 to drive the sliding rod 16 to move towards the pressure strip 7. This allows the actuating part 15 to slide from top to bottom on the surface of the pressure strip 7. During the sliding process, the downward pressing force of the actuating part 15 on the pressure strip 7 increases, thus causing the pressure strip to tighten. 7 can better compress the film. When the arc sleeve 4 moves between the rotating roller 8 and the arc support frame 3, the film is laid. At the same time, the pressure strip 7 also completes the compression of the film. When the film needs to be rolled up, the servo motor 13 starts, causing the arc sleeve 4 to move in the opposite direction, which in turn causes the actuating arm 19 to disengage from the actuating block 21. The elastic deformation capability of the pressure strip 7 itself will cause the actuating part 15 to swing upward, and cause the sliding pin 24, sliding rod 16 and other components to reset. When the arc sleeve 4 moves in the opposite direction, the winding roller 6 also rotates in the opposite direction and winds up the film.

[0083] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A film-laying and unlaying device for agricultural seedling greenhouses, characterized in that, include: Fixed plates (9) are set on both sides of the width direction of the greenhouse (2); The arc-shaped support frame (3) is fixed at both ends to the two fixed plates (9) respectively, and is located on the outside of the greenhouse (2), and its outline matches the outline of the greenhouse (2); The arc-shaped sleeve (4) is fitted onto the arc-shaped support frame (3) and can slide freely around the arc center of the arc-shaped support frame (3); The winding roller (6) is rotatably connected to the arc-shaped sleeve (4) and is used to wind the film; A driving component is disposed between the arc-shaped sleeve (4) and the arc-shaped support frame (3) for driving the arc-shaped sleeve (4) to slide along the arc-shaped support frame (3); A winding linkage assembly is disposed between the arc sleeve (4), the winding roller (6) and the arc support frame (3), and is used to drive the winding roller (6) to rotate to wind or unwind the film when the arc sleeve (4) slides. A film fixing end is disposed on one of the fixing plates (9) and is used to fix the unwound end of the film; A pressing component is set on the other side of the greenhouse (2) to press the film surface after the film is laid.

2. The agricultural planting and seedling greenhouse film loading and unloading device according to claim 1, characterized in that, The driving component includes: The first arc-shaped rack (10) is fixedly embedded on the outer periphery of the arc-shaped support frame (3); The servo motor (13) is horizontally mounted on the motor support on the upper side wall of the arc sleeve (4); The first gear (12) is fixedly sleeved on the motor shaft of the servo motor (13); The wall of the arc sleeve (4) is provided with a first clearance groove through which the first gear (12) passes. The first gear (12) passes through the first clearance groove and meshes with the first arc rack (10) for transmission.

3. The agricultural planting seedling greenhouse film loading and unloading device according to claim 2, characterized in that, The winding linkage component includes: The second arc-shaped rack (11) is fixedly embedded in the inner periphery of the arc-shaped support frame (3); The support arm is fixed to the wall of the arc sleeve (4) and extends downward. The winding roller (6) is rotatably connected between the two support arms of the arc sleeve (4) by means of a mounting bearing. The second gear (14) is coaxially fixed to both ends of the winding roller (6); The wall of the arc sleeve (4) is provided with a second clearance groove for the second gear (14) to pass through. The second gear (14) passes through the second clearance groove and meshes with the second arc rack (11) for transmission.

4. The agricultural planting and seedling greenhouse film loading and unloading device according to claim 1, characterized in that, The film fixing end includes: A strip clamp (1) is fixed to the upward side of one of the fixing plates (9), and the upward side of the strip clamp (1) is provided with a clamping groove (22) for engaging the end of the film. Multiple fastening bolts are installed on the strip clamp (1) to clamp and fix the film in the clamping groove (22).

5. The agricultural planting and seedling greenhouse film loading and unloading device according to claim 4, characterized in that, The clamping assembly includes: Multiple pressure strips (7) are provided and are evenly spaced along the length of the greenhouse (2). One end of the pressure strip (7) is fixed to the fixed plate (9) provided with the strip clamp (1), and the other end passes around the winding roller (6) and extends to another fixed plate (9). The pressure strip (7) passes through the winding roller (6) and the connecting rod (5) and has elastic deformation capability. The rotating roller (8) is horizontally rotatably connected to a fixed plate (9) away from the strip clamp (1). The end of the pressure strip (7) away from the strip clamp (1) is fixedly connected to the rotating roller (8). When the rotating roller (8) rotates, it can wind up the pressure strip (7). The linkage pressing part is disposed between the rotating roller (8) and the arc sleeve (4) and is used to drive the rotating roller (8) to rotate when the arc sleeve (4) slides to the end point so that the pressure strip (7) tightens and presses the film.

6. The agricultural planting seedling greenhouse film loading and unloading device according to claim 5, characterized in that, The linkage clamping part includes: The actuating arm (19) is fixed to both ends of the roller (8) in the axial direction and extends toward the arc-shaped support frame (3); The actuating block (21) is fixed to the end of the arc-shaped sleeve (4); When the arc sleeve (4) slides on the arc support frame (3) toward the rotating roller (8), the actuating block (21) can squeeze the actuating arm (19), causing the actuating arm (19) to drive the rotating roller (8) to rotate downward.

7. The agricultural planting seedling greenhouse film loading and unloading device according to claim 6, characterized in that, The linkage clamping part further includes an adaptive extrusion structure, which includes: A retaining ring is fixedly sleeved around the periphery of the rotating roller (8); Hollow cylinder (17) is fixed to the periphery of the fixed ring and extends radially outward. The hollow cylinder (17) is hollow inside and has one end open. The sliding rod (16) is inserted into the inner cavity of the hollow cylinder (17) and can slide freely along the axial direction; A prying part (15) is fixed to one end of the sliding rod (16) that protrudes from the hollow cylinder (17). The axial direction of the prying part (15) is perpendicular to the axial direction of the sliding rod (16), and each prying part (15) corresponds to one pressure strip (7). When the roller (8) rotates downwards, it drives the hollow cylinder (17) and the actuating part (15) to swing towards the greenhouse (2), so that the actuating part (15) presses the surface of the pressure strip (7).

8. The agricultural planting seedling greenhouse film loading and unloading device according to claim 7, characterized in that, The adaptive extrusion structure further includes: A tension spring (25) is installed in the inner cavity of the hollow cylinder (17). The two ends of the tension spring (25) are respectively fixedly connected to the end face of the sliding rod (16) and the inner wall of the hollow cylinder (17). Under normal conditions, the tension spring (25) exerts a pulling force on the sliding rod (16) to move towards the fixed ring. A sliding pin (24) is fixed to one end of the sliding rod (16) that passes through the inner cavity of the hollow cylinder (17); An oblong hole (23) is formed on the wall of the hollow cylinder (17) to allow the sliding pin (24) to pass freely. The length direction of the oblong hole (23) is parallel to the axial direction of the hollow cylinder (17).

9. The agricultural planting seedling greenhouse film loading and unloading device according to claim 8, characterized in that, The adaptive extrusion structure further includes: The extrusion plate (20) is fixedly attached to the fixed plate (9) on which the rotating roller (8) is provided, and corresponds to the fixed ring; An inclined surface (18) is provided on the side of the upper end of the extrusion plate (20) facing the greenhouse (2); When the hollow cylinder (17) swings downward, the sliding pin (24) slides on the inclined surface (18) and is driven by the thrust of the inclined surface (18) to move the sliding rod (16) and the actuating part (15) toward the pressure bar (7), so that the actuating part (15) slides from top to bottom on the surface of the pressure bar (7) and the squeezing pressure gradually increases.

10. The agricultural planting and seedling greenhouse film loading and unloading device according to claim 5, characterized in that, It also includes a connecting rod (5), which is horizontally fixed between the two arc sleeves (4), and the winding roller (6) is parallel to the connecting rod (5) and parallel to the length direction of the greenhouse (2); A connecting arm is welded to each end of a fixed plate (9) away from the strip clamp (1) along its length. The roller (8) is horizontally rotatably connected between the two connecting arms by means of a bearing. There is a gap between the connecting arm and the arc support frame (3) that allows the arc sleeve (4) to pass freely.

Images