Film covering and winding packaging device for fresh keeping of agricultural products

Abstract

The invention relates to the technical field of unmanned aerial vehicles, and discloses an agricultural product fresh-keeping film covering and winding packaging device which comprises a rack, the inner side of the rack is rotationally connected with a film frame mechanism, a rotating disc is rotationally connected between the two sides of the rack, a second motor is arranged outside the rotating disc, and the outer wall of the rotating disc is fixedly connected with a winding arm. A cutting mechanism is arranged on the outer side of the winding arm and comprises a sliding ring, the sliding ring is arranged on the outer side of the winding arm in a threaded mode, a knife rest is fixedly connected to the outer side of the sliding ring, a feedback piece is slidably connected to the middle of the knife rest, fixing piles are fixedly connected to the two sides of the middle of the knife rest, and transmission gears are rotatably connected to the outer sides of the fixing piles. Two sliding grooves are symmetrically formed in the outer side of the knife rest. According to the device, the film is pre-pressed and fixed before cutting, it is ensured that the film is tightly attached to the surface of an agricultural product, meanwhile, the agricultural product is prevented from being damaged through a flexible structure, and the stability and packaging quality of the film in the cutting process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and particularly to a film-wrapping and winding packaging device for preserving agricultural products. Background Art

[0002] In the process of preserving and packaging agricultural products, it is a common protection method to use a film-wrapping and winding device to perform outer packaging on agricultural products. After the film winding is completed, the film needs to be cut to complete the packaging. However, for agricultural products with irregular shapes, when cutting, there are problems that the film is difficult to fit the surface of the agricultural products, and it is easy to generate wrinkles or displacements, resulting in inaccurate cutting positions and uneven cut edges, which affect the packaging effect. At the same time, traditional cutting mechanisms mostly adopt rigid contact methods, and it is easy to cause damage to the epidermis of agricultural products due to improper pressure control during pressing and cutting. Especially for fruits with delicate epidermis such as strawberries and peaches, the damage problem is more prominent. In addition, the existing devices lack a pre-pressing structure that can automatically adjust according to the shape of agricultural products, and the film cannot be effectively smoothed before cutting, and the stability of the film is poor, seriously affecting the packaging quality and efficiency. When the existing film-wrapping and winding packaging devices for agricultural products cut the film, they usually directly cut the film through mechanical knives, without setting feedback and pre-pressing mechanisms adapted to the shape of agricultural products. For agricultural products with irregular shapes, there will be slack or wrinkles in the film after winding. When cutting, the knife directly contacts the film, which not only cannot ensure that the film closely fits the outer surface of the agricultural products, but also easily causes damage to the agricultural products due to local pressure concentration. For example, when there are protrusions or depressions on the surface of agricultural products, traditional rigid pressing blocks are difficult to adapt to their contours, which may cause the film to be overstretched at the protrusions and slack at the depressions. When cutting, it is easy to generate tears at the slack parts, or damage the agricultural products due to excessive pressure at the protrusion parts.

[0003] Therefore, in view of the above problems, a film-wrapping and winding packaging device for preserving agricultural products is proposed to solve the above problems. Summary of the Invention

[0004] In order to make up for the above deficiencies, the present invention provides a film-wrapping and winding packaging device for preserving agricultural products, aiming to improve the problems that irregular agricultural products are easy to displace and damaged when cutting after film winding in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A film-wrapping and winding packaging device for preserving agricultural products includes a frame. A film rack mechanism is rotatably connected to the inner side of the frame. A turntable is rotatably connected between two sides of the frame. A second motor is arranged outside the turntable. A winding arm is fixedly connected to the outer wall of the turntable. A cutting mechanism is arranged outside the winding arm. The cutting mechanism includes a sliding ring, which is threadedly arranged outside the winding arm. A tool holder is fixedly connected to the outside of the sliding ring. A feedback member is slidably connected to the middle of the tool holder. Fixed piles are fixedly connected to both sides of the middle of the tool holder. Transmission gears are rotatably connected to the outside of the fixed piles. Two chutes are symmetrically formed on the outside of the tool holder. A pressing member is slidably connected to the outside of the tool holder. A cutting knife is slidably connected to the inside of the tool holder; As a further description of the above technical solution: The feedback member includes a sliding plate, which is slidably connected to the middle of the tool holder on the outside. A first rack plate is fixedly connected to one side of the sliding plate. The upper and lower sides of the first rack plate are engaged with the outside of the two transmission gears. A contact ball is fixedly connected to the front end of the sliding plate, and the contact ball is deformable; As a further description of the above technical solution: The pressing member includes a second rack plate, which is slidably connected to the inside of the chute on one side. The outside of the second rack plate is engaged with the outside of the transmission gear. A pressing block is fixedly connected to the outside of the second rack plate. The inner side of the pressing block is arc-shaped. A flexible smoothing strip is arranged on the inner side of the pressing block; As a further description of the above technical solution: The cutting knife includes a sliding rod, which is slidably connected to the inside of the tool holder on the outside. A knife body is fixedly connected to one end of the sliding rod. Sharp slope-shaped knife surfaces are arranged around the knife body. A spring is arranged between the other end of the sliding rod and the inner side of the tool holder; As a further description of the above technical solution: The film rack mechanism includes two threaded columns, the two ends of which are rotatably connected to the inside of the machine frame. A motor I is arranged on the outside of the machine frame, and the output end of the motor I is fixedly connected to one end of one of the threaded columns. A transmission member is arranged between the two threaded columns, and the transmission member is a belt-pulley transmission structure. A winding roller is threadedly connected to the outside of the threaded column. A preservative film is arranged between the two winding rollers. A limiting rod is arranged on the inside of the machine frame. The winding roller is slidably connected to the outside of the limiting rod; As a further description of the above technical solution: The winding arm includes a winding tube, one end of which is fixedly connected to the outside of the turntable. A middle-shaped groove is formed on the outside of the winding tube. The outside of the tool holder is slidably connected to the inside of the middle-shaped groove. The shape of the side of the tool holder in contact with the winding tube fits the outside of the winding tube; As a further description of the above technical solution: The winding arm further includes a threaded rod, which is rotatably connected to the inside of the winding tube. The inside of the sliding ring is threadedly connected to the outside of the threaded rod. A driving disk is fixedly connected to one end of the threaded rod; As a further description of the above technical solution: The bottom of the frame is fixedly connected with a fixed plate. Flexible jaws are arranged at the central positions on the sides of the fixed plate and the turntable close to each other, and the other end of the winding arm contacts the outside of the fixed plate.

[0006] The present invention has the following beneficial effects: 1. In the present invention, when the contact ball (deformable) of the feedback member contacts the outside of the agricultural product and slides inward, it drives the sliding plate to slide in the middle of the tool rest. The rack plate one on the sliding plate meshes with the transmission gear, driving the rack plate two to slide in the chute, so that the outer pressing block (with a flexible smoothing strip on the inner arc) moves and presses and smooths the winding film, realizing the pre-pressing and fixing of the film before cutting, ensuring that the film closely adheres to the surface of the agricultural product. At the same time, the flexible structure is used to avoid damaging the agricultural product, improving the stability of the film and the packaging quality during the cutting process.

[0007] 2. In the present invention, the cutting mechanism as a whole adopts a pure mechanical linkage trigger and feedback mechanism. The driving disk rotates to drive the threaded rod, so that the sliding ring slides along the middle-shaped groove and triggers the release of the elastic potential energy of the spring. Combined with the structural design of the slope-shaped tool surfaces around the tool body, the accurate cutting action without an electronic sensor is realized, ensuring that the film is completely cut off and the cut is neat, avoiding the packaging failure problem caused by incomplete cutting. This pure mechanical structure has significantly better reliability than the traditional electronic trigger system in harsh environments such as humidity and dust, effectively reducing the equipment failure rate and extending the service life. Description of the Drawings

[0008] Figure 1 is a three-dimensional schematic diagram of a film winding packaging device for agricultural product preservation proposed by the present invention Figure 1 ; Figure 2 is a three-dimensional schematic diagram of a film winding packaging device for agricultural product preservation proposed by the present invention Figure 2 ; Figure 3 is a structural schematic diagram of the turntable of a film winding packaging device for agricultural product preservation proposed by the present invention; Figure 4 is a structural schematic diagram of the winding tube of a film winding packaging device for agricultural product preservation proposed by the present invention; Figure 5 is a structural schematic diagram of the threaded rod of a film winding packaging device for agricultural product preservation proposed by the present invention; Figure 6 is a structural schematic diagram of the cutting mechanism of a film winding packaging device for agricultural product preservation proposed by the present invention; Figure 7 is a structural schematic diagram of the feedback member of a film winding packaging device for agricultural product preservation proposed by the present invention; Figure 8Schematic structural diagram of the pressing member of a film-wrapping and winding packaging device for preserving agricultural products proposed by the present invention; Figure 9 Schematic structural diagram of the cutting knife of a film-wrapping and winding packaging device for preserving agricultural products proposed by the present invention.

[0009] Legend: 1. Frame; 2. Film frame mechanism; 201. Threaded column; 202. Motor 1; 203. Transmission member; 204. Winding roller; 205. Fresh-keeping film; 206. Limit rod; 3. Turntable; 4. Motor 2; 5. Fixed plate; 6. Flexible gripper; 7. Winding arm; 701. Winding tube; 702. Middle-shaped groove; 703. Threaded rod; 704. Driving disk; 8. Cutting mechanism; 81. Sliding ring; 82. Tool holder; 83. Feedback member; 831. Sliding plate; 832. Contact ball; 833. Rack plate 1; 84. Fixed pile; 85. Transmission gear; 86. Pressing member; 861. Rack plate 2; 862. Pressing block; 863. Flexible smoothing strip; 87. Chute; 88. Cutting knife; 881. Sliding rod; 882. Knife body; 883. Spring. Specific implementation manners

[0010] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0011] Refer to Figures 1 to 9 , an embodiment provided by the present invention: A film-wrapping and winding packaging device for preserving agricultural products includes a frame 1. The frame 1 serves as the basic support structure of the device, providing an installation carrier for components such as the film frame mechanism 2, the turntable 3, and the fixed plate 5, ensuring the relative positions of the components are stable and guaranteeing the structural strength during the overall operation. The film frame mechanism 2 is rotatably connected to the inner side of the frame 1, and the turntable 3 is rotatably connected between the two sides of the frame 1. The turntable 3 is driven to rotate by the externally arranged motor 2, enabling the winding arm 7 fixed to the outer wall of the turntable 3 to obtain rotational power, and then driving the cutting mechanism 8 to perform a circular motion around the agricultural product, realizing the spiral winding and covering of the winding film. The motor 2 is arranged outside the turntable 3, the winding arm 7 is fixedly connected to the outer wall of the turntable 3, the cutting mechanism 8 is arranged outside the winding arm 7, the fixed plate 5 is fixedly connected to the bottom of the frame 1, and flexible grippers 6 are arranged at the central positions on the sides of the fixed plate 5 close to the turntable 3. The flexible grippers 6 achieve flexible fixation of the agricultural product through the characteristics of the flexible material, which can both stably limit the displacement of the agricultural product during the packaging process and avoid damage to the agricultural product caused by rigid clamping, and are applicable to various-shaped agricultural products. And the other end of the winding arm 7 contacts the outside of the fixed plate 5.

[0012] The film rack mechanism 2 includes two threaded columns 201. Both ends of the threaded column 201 are rotatably connected to the inner side of the frame 1. A first motor 202 is arranged on the outer side of the frame 1. The output end of the first motor 202 is fixedly connected to one end of the threaded column 201. The first motor 202 drives the threaded column 201 to rotate, and the winding roller 204 moves along the axial direction of the threaded column 201 through the thread transmission characteristic. A transmission member 203 is arranged between the two threaded columns 201. The transmission member 203 is a belt-pulley transmission structure, which synchronously transmits the rotational power of a single threaded column 201 to the other threaded column 201, ensuring that the rotational speeds of the two threaded columns 201 are the same, so that the movement of the winding rollers 204 on both sides is synchronized, and avoiding wrinkles or breaks of the fresh-keeping film 205 due to uneven tension on both sides. The winding roller 204 is threadedly connected to the outer side of the threaded column 201. A fresh-keeping film 205 is arranged between the two winding rollers 204. A limiting rod 206 is arranged on the inner side of the frame 1. The winding roller 204 is slidably connected to the outer side of the limiting rod 206. The winding roller 204 is used to install and carry the fresh-keeping film 205 roll. Under the limitation of the limiting rod 206, it can only slide in the horizontal direction, and cooperate with the rotation of the threaded column 201 to realize the automatic unwinding and position adjustment of the fresh-keeping film 205, ensuring that the outside of the agricultural product is completely covered by the film without dead angles.

[0013] The winding arm 7 includes a winding tube 701. One end of the winding tube 701 is fixedly connected to the outer side of the turntable 3. The winding tube 701 serves as the main structure of the winding arm 7. The middle-shaped groove 702 opened on its outer side provides a sliding track for the tool holder 82, enabling the tool holder 82 to move along the circumferential direction of the winding arm 7 to meet the cutting operation requirements of the cutting mechanism 8 at different positions. The middle-shaped groove 702 is opened on the outer side of the winding tube 701. The outer side of the tool holder 82 is slidably connected to the inside of the middle-shaped groove 702. The shape of the side of the tool holder 82 in contact with the winding tube 701 fits the outer side of the winding tube 701. The winding arm 7 further includes a threaded rod 703. The threaded rod 703 is rotatably connected to the inside of the winding tube 701. The inner side of the sliding ring 81 is threadedly connected to the outer side of the threaded rod 703. One end of the threaded rod 703 is fixedly connected to a driving disk 704. When the driving disk 704 rotates, it drives the threaded rod 703 to rotate. Using the principle of thread transmission, the sliding ring 81 moves along the axial direction of the threaded rod 703, and then drives the tool holder 82 to slide in the middle-shaped groove 702 through the sliding ring 81, realizing the precise adjustment of the position of the cutting knife 88 to adapt to the cutting requirements of agricultural products of different sizes.

[0014] The cutting mechanism 8 includes a sliding ring 81 which is threadedly arranged outside the winding arm 7. As an intermediate component connecting the winding arm 7 and the tool holder 82, through the threaded cooperation with the threaded rod 703, it converts the rotational motion of the threaded rod 703 into its own linear motion, thereby driving the tool holder 82 to slide along the winding arm 7 to achieve the position adjustment of the cutting mechanism 8. A tool holder 82 is fixedly connected to the outside of the sliding ring 81. A feedback member 83 is slidably connected to the middle of the tool holder 82. Fixed piles 84 are fixedly connected to both sides of the middle of the tool holder 82. The fixed piles 84 provide a rotation fulcrum for the transmission gear 85 to ensure the stable rotation of the transmission gear 85 and the transmission of power. A transmission gear 85 is rotatably connected to the outside of the fixed pile 84. Two chutes 87 are symmetrically formed on the outside of the tool holder 82. A pressing member 86 is slidably connected to the outside of the tool holder 82. A cutting knife 88 is slidably connected to the inside of the tool holder 82.

[0015] The feedback member 83 includes a sliding plate 831. The outside of the sliding plate 831 is slidably connected to the middle of the tool holder 82. A first rack plate 833 is fixedly connected to one side of the sliding plate 831. The upper and lower sides of the first rack plate 833 are engaged with the outside of the two transmission gears 85. A contact ball 832 is fixedly connected to the front end of the sliding plate 831. The contact ball 832 is deformable. When contacting the outside of the agricultural product during the cutting process, it senses the contour of the agricultural product through its own deformation, triggers the sliding plate 831 to slide in the middle of the tool holder 82, provides a trigger signal for the subsequent pressing action. At the same time, when the first rack plate 833 moves with the sliding plate 831, it meshes with the transmission gear 85, converts the linear motion of the sliding plate 831 into the rotational motion of the transmission gear 85, realizes the transmission and amplification of mechanical signals, and drives the pressing member 86 to act.

[0016] The pressing member 86 includes a second rack plate 861. One side of the second rack plate 861 is slidably connected inside the chute 87. The outside of the second rack plate 861 is engaged with the outside of the transmission gear 85. A pressing block 862 is fixedly connected to the outside of the second rack plate 861. The inner side of the pressing block 862 is arranged in an arc shape. A flexible smoothing strip 863 is arranged on the inner side of the pressing block 862. The second rack plate 861 meshes with the transmission gear 85 and slides along the chute 87 when the gear rotates, driving the pressing block 862 to move, converting the rotational motion of the transmission gear 85 into the linear motion of the pressing block 862. The arc-shaped structure on the inner side of the pressing block 862 fits the contour of the agricultural product. The flexible smoothing strip 863 is made of an elastic material, presses and smooths the wrinkles of the winding film before cutting, makes the film closely fit the surface of the agricultural product, and at the same time avoids rigid contact from damaging the agricultural product, improving the stability of the film during cutting.

[0017] The cutting knife 88 includes a sliding rod 881, the outer side of the sliding rod 881 is slidably connected to the inside of the knife holder 82, one end of the sliding rod 881 is fixedly connected to a knife body 882, and sharp sloped knife surfaces are arranged all around the knife body 882. A spring 883 is arranged between the other end of the sliding rod 881 and the inner side of the knife holder 82. The spring 883 stores elastic potential energy and releases it during cutting, providing power for the knife body 882 to extend outward, ensuring that the knife body 882 contacts the stretch film with a stable pressure, and cooperating with the sloped knife surfaces around the knife body 882, utilizing the sharp cutting edge and the labor-saving principle of the inclined surface, to achieve rapid cutting of the stretch film, to ensure that the film is completely cut and the incision is neat, to avoid packaging failure due to incomplete cutting.

[0018] Working principle: When in use, the agricultural products are placed on the cling film 205, and the agricultural products are fixed by two flexible clamps 6, and then the motor 2 4 is started, and the motor 2 4 drives the turntable 3 to rotate, and the winding arm 7 fixed on the outer wall of the turntable 3 rotates accordingly. At this time, the cling film 205 is drawn out from the film frame mechanism 2, and the agricultural products begin to be wound as the winding arm 7 rotates, and during the winding process, the motor 1 202 is turned on, and the rotation of the motor 1 202 drives the threaded column 201 to rotate, and the belt-pulley transmission structure drives another threaded column 201 to rotate synchronously, so that the winding roller 204 is driven to move horizontally through the limiting effect of the limit rod 206, so as to ensure that the outside of the agricultural products can be completely covered with the film.

[0019] When the coating is completed, the driving disk 704 is rotated, and the driving disk 704 rotates to drive the threaded rod 703 to rotate, and the threaded rod 703 rotates to drive the rotating ring to slide along the middle-shaped groove 702, so that the cutting knife 88 on the knife holder 82 cuts the two ends of the plastic wrap 205, and due to the elastic effect of the spring 883, the knife body 882 can extend outward, and the knife surface around the knife body 882 ensures that the plastic wrap 205 can be completely cut off, and during the cutting process, the contact ball 832 (deformable) of the feedback member 83 contacts the outside of the agricultural product and slides inward, so that the sliding plate 831 slides in the middle of the knife holder 82. The rack plate 1 833 on one side of the sliding plate 831 meshes with the transmission gear 85, driving the transmission gear 85 to rotate, and then the part meshing with the rack plate 2 861 drives the rack plate 2 861 to slide in the slide groove 87, and the clamping block 862 on the outside of the rack plate 2 861 moves accordingly. The inner arc-shaped structure with a flexible smoothing strip 863 presses and smoothes the film wrapped around the agricultural product, thereby ensuring that the cling film 205 can be completely close to the surface of the agricultural product without easily damaging the agricultural product.

[0020] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A film-wrapping and winding packaging device for preserving agricultural products, comprising a frame (1), characterized in that: The inner side of the frame (1) is rotatably connected with a film frame mechanism (2). A turntable (3) is rotatably connected between the two sides of the frame (1). An electric motor two (4) is arranged outside the turntable (3). A winding arm (7) is fixedly connected to the outer wall of the turntable (3). A cutting mechanism (8) is arranged outside the winding arm (7). The cutting mechanism (8) includes a sliding ring (81). The sliding ring (81) is threadedly arranged outside the winding arm (7). A tool holder (82) is fixedly connected to the outer side of the sliding ring (81). A feedback member (83) is slidably connected to the middle of the tool holder (82). Fixed posts (84) are fixedly connected to both sides of the middle of the tool holder (82). A transmission gear (85) is rotatably connected to the outside of the fixed post (84). Two chutes (87) are symmetrically formed on the outside of the tool holder (82). A pressing member (86) is slidably connected to the outside of the tool holder (82). A cutting knife (88) is slidably connected to the inside of the tool holder (82).

2. The film-wrapping and winding packaging device for preserving agricultural products according to claim 1, wherein: The feedback member (83) includes a sliding plate (831). The outer side of the sliding plate (831) is slidably connected to the middle of the tool holder (82). A first rack plate (833) is fixedly connected to one side of the sliding plate (831). The upper and lower sides of the first rack plate (833) are meshed with the outside of the two transmission gears (85). A contact ball (832) is fixedly connected to the front end of the sliding plate (831), and the contact ball (832) is deformable.

3. The film-wrapping and winding packaging device for preserving agricultural products according to claim 1, wherein: The pressing member (86) includes a second rack plate (861). One side of the second rack plate (861) is slidably connected inside the chute (87). The outside of the second rack plate (861) is meshed with the outside of the transmission gear (85). A pressing block (862) is fixedly connected to the outside of the second rack plate (861). The inner side of the pressing block (862) is arranged in an arc shape. A flexible smoothing strip (863) is arranged on the inner side of the pressing block (862).

4. A film-wrapping and winding packaging device for preserving agricultural products according to claim 1, characterized in that: The cutting knife (88) includes a sliding rod (881). The outer side of the sliding rod (881) is slidably connected to the inside of the tool holder (82). A knife body (882) is fixedly connected to one end of the sliding rod (881). The periphery of the knife body (882) is provided with sharp slope-shaped knife surfaces. A spring (883) is arranged between the other end of the sliding rod (881) and the inner side of the tool holder (82).

5. The film-wrapping and winding packaging device for preserving agricultural products according to claim 1, wherein: The film frame mechanism (2) includes two threaded columns (201). The two ends of the threaded columns (201) are rotatably connected to the inner side of the frame (1). An electric motor one (202) is arranged outside the frame (1). The output end of the electric motor one (202) is fixedly connected to one end of one of the threaded columns (201). A transmission member (203) is arranged between the two threaded columns (201), and the transmission member (203) is a belt-pulley transmission structure. A winding roller (204) is threadedly connected to the outside of the threaded column (201). A fresh-keeping film (205) is arranged between the two winding rollers (204). A limiting rod (206) is arranged on the inner side of the frame (1). The winding roller (204) is slidably connected to the outside of the limiting rod (206).

6. The film-wrapping and winding packaging device for preserving agricultural products according to claim 1, wherein: The winding arm (7) includes a winding tube (701). One end of the winding tube (701) is fixedly connected to the outside of the turntable (3). A Chinese character-shaped groove (702) is formed on the outside of the winding tube (701). The outside of the tool holder (82) is slidably connected to the inside of the Chinese character-shaped groove (702). The shape of the side of the tool holder (82) in contact with the winding tube (701) fits the outside of the winding tube (701).

7. The film-wrapping and winding packaging device for agricultural product preservation according to claim 1, characterized in that: The winding arm (7) further includes a threaded rod (703). The threaded rod (703) is rotatably connected to the inside of the winding tube (701). The inner side of the sliding ring (81) is threadedly connected to the outside of the threaded rod (703). One end of the threaded rod (703) is fixedly connected to a driving disc (704).

8. A film-wrapping and winding packaging device for agricultural product preservation according to claim 1, wherein: A fixed plate (5) is fixedly connected to the bottom of the frame (1). Flexible jaws (6) are provided at the central positions on the sides of the fixed plate (5) and the turntable (3) close to each other. The other end of the winding arm (7) contacts the outside of the fixed plate (5).

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