A turnover device for a carton assembly production line

Abstract

This utility model discloses a flipping device for a packaging box assembly line, including a chassis with two lifting plates on both sides inside the chassis. Each lifting plate is slidably mounted on two vertically arranged guide shafts, which are fixedly connected to the top and bottom plates of the chassis, respectively. Two lead screw modules for driving the vertical movement of the lifting plates are arranged on both sides of the lifting plates. Two clamping slots are provided between the two lifting plates, and a rotating shaft is arranged between each clamping slot and a lifting plate. One end of the rotating shaft is rotatably connected to a lifting plate, and the other end is connected to the lifting plate through an adjustment component. Each lifting plate is equipped with a drive mechanism for driving the rotating shaft. This utility model can realize the synchronous flipping of multiple packaging box cardboards, with high flipping efficiency and smooth integration with subsequent processes.

Description

Technical Field

[0001] This utility model relates to the field of packaging box processing equipment technology, and in particular to a flipping device for use on a packaging box assembly production line. Background Technology

[0002] In the production of packaging boxes such as premium boxes, pasting is a crucial process. Coated paper, art paper, velvet, leather, etc., are glued or sprayed with adhesive using a gluing machine and then firmly bonded to the grey board. To ensure a smoother and more aesthetically pleasing pasting finish and avoid issues such as bubbles and wrinkles, the cardboard needs to be flipped over. This allows for better application of glue to the back of the box or adjustment of the paper position, ensuring the quality of the pasting.

[0003] Current packaging box flipping equipment is not suitable for flipping multiple packaging boxes; it can only flip a single packaging box. The flipping time for a single packaging box is uncertain, which makes it impossible for subsequent processes to match and hinders smooth transitions between processes. Utility Model Content

[0004] This utility model provides a flipping device for packaging box assembly production line, which solves the problems of traditional packaging box cardboard flipping equipment that can only flip a single packaging box cardboard, the packaging box cardboard flipping time is uncertain, it cannot match with subsequent processes, and the processes cannot be smoothly connected.

[0005] This utility model provides a flipping device for a packaging box assembly production line, including a chassis. Two lifting plates are arranged on both sides of the chassis. Each lifting plate is slidably mounted on two vertically arranged guide shafts. The two guide shafts are fixedly connected to the top plate and bottom plate of the chassis, respectively. Two lead screw modules for driving the vertical movement of the lifting plates are arranged on both sides of the two lifting plates. Two clamping slots are arranged between the two lifting plates. A rotating shaft is arranged between each clamping slot and the lifting plate. One end of the rotating shaft is rotatably connected to the lifting plate, and the other end is connected to the lifting plate through an adjustment component. Each lifting plate is provided with a drive mechanism for driving the rotating shaft to rotate.

[0006] In the above technical solution, the driving mechanism further includes a gear, which is coaxially mounted on a rotating shaft. A fixed plate is provided below the gear, a guide rail is provided on the fixed plate, a slider is provided on the guide rail, a rack is provided on the slider, and a first hydraulic cylinder is provided on one side of the rack. The telescopic end of the first hydraulic cylinder is connected to a hinge seat provided on the side wall of the rack.

[0007] In the above technical solution, the adjusting component further includes a fixed rod, the middle of which is fixedly connected to the rotating shaft. Two guide rods are provided at both ends of the fixed rod. One end of each guide rod is connected to the clamping groove, and the other end passes through a guide hole correspondingly provided on the fixed rod for guiding and sliding cooperation. A compression spring is provided between the two guide rods. One end of the compression spring is elastically fixedly connected to the fixed rod, and the other end is elastically fixedly connected to the clamping groove.

[0008] In the above technical solution, a feeding conveyor is further provided at the bottom of the front end of the chassis, a support is provided above the feeding conveyor, a positioning plate is provided on the support, a flipping plate is provided at the lower end of the positioning plate, the upper end of one end of the flipping plate is hinged to the lower end of the positioning plate, a second hydraulic cylinder is provided at the rear side of the positioning plate, the fixed end of the second hydraulic cylinder is hinged to the hinge seat on the rear side wall of the positioning plate, and the telescopic end of the second hydraulic cylinder is hinged to the hinge seat on the side wall of the flipping plate.

[0009] In the above technical solution, a lifting frame is further provided above the bracket, the upper end of the lifting frame is fixedly connected to the top of the chassis, and a third hydraulic cylinder is horizontally provided at the lower end, with the telescopic end of the third hydraulic cylinder fixedly connected to the push plate.

[0010] Furthermore, in the above technical solution, a material unloading conveyor is provided at the rear end of the chassis.

[0011] In the above technical solution, a support is further provided on the lifting plate, a fourth hydraulic cylinder is provided on the support, and an electromagnet is provided at the extension and retraction end of the fourth hydraulic cylinder.

[0012] As can be seen from the above technical solutions, this utility model provides a flipping device for use in a packaging box assembly production line. Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes an adjustable assembly to allow the clamping slot to adapt to packaging cardboard of varying widths and provide stable clamping force. A dual-screw module, dual-guide shafts, and linear bearings ensure smooth and precise lifting movements. A hydraulic cylinder drives a rack and pinion transmission to provide high torque, enabling stable 0-360° rotation. Photoelectric sensors and a hydraulic flipping plate ensure precise entry of the packaging box into the clamping position. Electromagnetic adsorption and a hydraulic cylinder work together to overcome spring force and open the clamping slot when needed, automatically clamping it back up when released. The ingenious and reliable structure facilitates the clamping and rotation of multiple packaging cardboard boxes. The rotation time is controllable, ensuring smooth transitions with subsequent processes. Attached Figure Description

[0013] To more clearly illustrate the technical solution of this utility model, the drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0014] Figure 1 This is a front view schematic diagram of the overall structure of a flipping device for a packaging box assembly production line proposed in this utility model; Figure 2 Appendix to this utility model Figure 1 A partially enlarged structural diagram of position I; Figure 3 This is a three-dimensional structural diagram of a flipping device for use on a packaging box assembly production line proposed in this utility model; Figure 4 This is a schematic diagram of the internal structure of a flipping device for use on a packaging box assembly production line according to the present invention; Figure 5 Appendix to this utility model Figure 4 A magnified schematic diagram of the partial structure at position II; Figure 6 This is a side view of the overall structure of a flipping device for use on a packaging box assembly line, as proposed in this utility model.

[0015] In the picture: 1-Chassis; 2-Lifting plate; 21-Support; 22-Fourth hydraulic cylinder; 23-Electromagnet; 24-Motor; 25-Lead screw; 26-Lead screw nut; 3-Guide shaft; 4-Clamping groove; 5-Rotating shaft; 6-Adjusting assembly; 61-Fixed rod; 62-Guide rod; 63-Compression spring; 7-Drive mechanism; 71-Gear; 72-Fixed plate; 73-Guide rail; 74-Slider; 75-Rack; 76-First hydraulic cylinder; 8-Feeding conveyor; 81-Bracket; 82-Positioning plate; 83-Tilting plate; 84-Second hydraulic cylinder; 85-Lifting frame; 86-Third hydraulic cylinder; 87-Push plate; 9-Unloading conveyor; 10-Carton. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0017] Example 1: See Figure 1-6A flipping device for use on a packaging box assembly line includes a housing 1. Two lifting plates 2 are arranged on both sides inside the housing 1. Each lifting plate 2 is slidably mounted on two vertically arranged guide shafts 3. The two guide shafts 3 are fixedly connected to the top plate and bottom plate of the housing 1, respectively. Two lead screw modules for driving the vertical movement of the lifting plates 2 are arranged on both sides of the two lifting plates 2. Two clamping slots 4 are arranged between the two lifting plates 2. A rotating shaft 5 is arranged between each clamping slot 4 and the lifting plate 2. One end of the rotating shaft 5 is rotatably connected to the lifting plate 2, and the other end is connected to the lifting plate 2 through an adjustment component 6. A drive mechanism 7 for driving the rotating shaft 5 to rotate is arranged on each lifting plate 2.

[0018] In this embodiment, the front and rear ends of the chassis 1 are open. The chassis 1 has an internal rectangular three-dimensional steel frame and is externally welded from Q235 steel plates. There are two lifting plates 2, symmetrically arranged on both sides of the chassis, made of aluminum. Each lifting plate 2 has two vertical guide holes at both ends, with two linear bearings installed within these holes. The lifting plates 2 are slidably mounted on two guide shafts 3 via these linear bearings. Each guide shaft 3 is vertically fixed between the top and bottom plates of the chassis, ensuring the vertical movement accuracy of the lifting plates (±0.1mm). The clamping groove 4 is a horizontal U-shaped groove with the U-shaped openings facing each other. The bottom sidewall of the clamping groove 4 has a rubber coating for flexible clamping of the packaging cardboard. On both sides, two clamping slots 4 are used to support the two ends of the packaging box. Each lifting plate 2 has a horizontal mounting hole on its side wall. The rotating shaft 5 is horizontally inserted into the mounting hole and rotated and supported by a deep groove ball bearing (model: 6205ZZ) in the mounting hole. One end of the rotating shaft 5 is adjusted by the adjusting component 6 to finely adjust the position of the clamping slot 4 and clamp the packaging box. Each lifting plate is equipped with a set of drive mechanism 7 to drive the rotating shaft 5 to rotate (0-360° adjustable) to realize the lifting and synchronous flipping function of the packaging box. The guide shaft 5 ensures the stability of the movement.

[0019] In this embodiment, see Figure 4 , 5 Each lead screw module includes a motor 24, a lead screw 25, a lead screw nut 26, a shaft seat, and a coupling. The lead screw 25 is vertically installed on one side of the lifting plate 2 inside the housing 1. The two ends of the lead screw 25 are rotatably supported by the shaft seats on the top and bottom side walls of the housing 1. The motor is installed on the top of the housing 1. The motor is a servo motor. The output shaft of the motor 24 passes through the top plate of the housing 1 and is coaxially and fixedly connected to the upper end of the lead screw 25 through the coupling. The lead screw nut 26 is installed on the lead screw 25. The lead screw nut 26 is fixedly connected to the lifting plate 2. The motor drives the lead screw 25 to rotate, which drives the lead screw nut 26 and the lifting plate 2 to move up and down synchronously.

[0020] In this embodiment, see Figure 5The drive mechanism 7 includes a gear 71, which is coaxially mounted on the rotating shaft 5. A fixed plate 72 is positioned below the gear 71, a guide rail 73 is mounted on the fixed plate 72, a slider 74 is mounted on the guide rail 73, and a rack 75 is mounted on the slider 74. A first hydraulic cylinder 76 is mounted on one side of the rack 75, and the telescopic end of the first hydraulic cylinder 76 is connected to a hinge seat on the side wall of the rack 75. The rotating shaft 5 extends to one side of the lifting plate 2 and is coaxially keyed to the gear 71. The fixed plate 72 is welded to the lifting plate 2. The guide rail 73, model HGH20CA, is a linear guide rail. The slider 74 is matched with the guide rail and fixed at the top. The first hydraulic cylinder 76, model MOB50×200, has a thrust of 5kN. Its telescopic end pushes the rack to move linearly through the hinge seat. The hydraulic drive of the rack 75-gear 71 transmission achieves high torque output (≥300N·m) for the flipping action.

[0021] In this embodiment, see Figure 2 The adjusting component 6 includes a fixed rod 61, the middle of which is fixedly connected to the rotating shaft 5. Two guide rods 62 are provided at both ends of the fixed rod 61. One end of each guide rod 62 is connected to the clamping groove 4, and the other end is inserted into the guide hole corresponding to the fixed rod 61 for guidance and sliding fit. A compression spring 63 is provided between the two guide rods 62. One end of the compression spring 63 is elastically fixedly connected to the fixed rod 61, and the other end is elastically fixedly connected to the clamping groove 4. The middle of the fixed rod 61 is fixedly connected to the rotating shaft 5. There are two guide rods 62. One end of each guide rod 62 is fixed to the side wall of the clamping groove 4, and the other end is inserted into the guide hole of the fixed rod (gap 0.05mm) for guidance and sliding fit. The end of the guide rod 62 extending out of the guide hole is limited by a fixing nut. The compression spring model 63 has a diameter of D×d×H=30×20×80 (unit: mm) and a preload of 200N. One end is elastically fixed to the first spring seat fixed on the fixing rod 61, and the other end is elastically fixed to the second spring seat set on the side wall of the clamping groove, so that the distance between the two clamping grooves 4 can be adjusted to accommodate the width of the packaging box for clamping.

[0022] In this embodiment, see Figure 3 , 4A feeding conveyor 8 (a commercially available device) is installed at the bottom front of the chassis 1. A support 81 is installed above the feeding conveyor 8, and a positioning plate 82 is installed on the support 81. A tilting plate 83 is installed at the lower end of the positioning plate 82. The upper end of one end of the tilting plate 83 is hinged to the lower end of the positioning plate 82. A second hydraulic cylinder 84 is installed on the rear side of the positioning plate 82. The fixed end of the second hydraulic cylinder 84 is hinged to a hinge seat on the rear side wall of the positioning plate 82, and the telescopic end of the second hydraulic cylinder 84 is hinged to a hinge seat on the side wall of the tilting plate 83. The feeding conveyor 8 is a roller belt conveyor with a power of 0.75kW. The support 81 is fixed to the bottom frame of the chassis 1. The positioning plate 82 is equipped with a photoelectric sensor (model E3Z-D61) to detect the box's positioning. The tilting plate 83 is connected to the lower end of the positioning plate 82 via a hinge (optional). The second hydraulic cylinder, model 84 MOB30×100, drives the tilting plate 83 to open and close at 0-90°. By intercepting, multiple stacked packaging cardboard boxes are neatly placed on the feeding conveyor 8. The tilting plate 83 is lifted to release the packaging cardboard boxes and accurately enter the clamping station. The tilting plate prevents the boxes from shifting.

[0023] In this embodiment, see Figure 3 , 4 6. A lifting frame 85 is installed above the support 81. The upper end of the lifting frame 85 is fixedly connected to the top of the machine housing 1, and the lower end is horizontally installed with a third hydraulic cylinder 86. The telescopic end of the third hydraulic cylinder 86 is fixedly connected to a push plate 87. The lifting frame 85 is suspended from the top of the machine housing 1. The third hydraulic cylinder 86, model MOB40×300, is installed horizontally, and its telescopic end is connected to the push plate 87. The push plate 87 is made of polyurethane and is used to push the flipped packaging cardboard into the unloading conveyor 9 (a commercially available device) located at the rear end of the machine housing 1.

[0024] In this embodiment, see Figure 5 A support 21 is installed on the lifting plate 2, and a fourth hydraulic cylinder 22 is installed on the support 21. An electromagnet 23 is installed at the telescopic end of the fourth hydraulic cylinder 22. The support 21 is welded to the lifting plate 2. The fourth hydraulic cylinder 22 is a MOB20×50 model, and the electromagnet 23 is installed at its telescopic end. The electromagnet 23 is a MHE2-15D model with a suction force of 1.5kN. When the fourth hydraulic cylinder 22 extends its telescopic end, the electromagnet 23 touches the clamping groove 4. Then, it is energized to attract the metal parts of the clamping groove 4. The fourth hydraulic cylinder 22 drives its telescopic end to retract, causing the two clamping grooves 4 to move to both sides a certain distance. Then, the feeding conveyor 8 transports the multi-layer packaging cardboard into the two clamping grooves 4 completely. Then, the electromagnet 23 is de-energized. Under the action of the compression spring 63 of the adjusting component 6, the two clamping grooves 4 clamp and fix the two sides of the packaging cardboard to prevent slippage.

[0025] In this embodiment, in order to achieve precise automated control and ensure reliable connection of each process action, the device is equipped with a variety of sensors at key workstations to detect key information such as the position of the packaging box, clamping status, lifting height and flipping angle.

[0026] This embodiment can use a feeding position detection sensor (photoelectric sensor) (not shown in the figure): "A photoelectric sensor (model E3Z-D61) is vertically installed at the lower center of the positioning plate 82, and its beam shines downwards onto the running path of the packaging cardboard on the feeding conveyor 8. When the packaging cardboard runs to the bottom of the positioning plate 82 and blocks the beam of the photoelectric sensor, it indicates that the packaging cardboard has reached the predetermined feeding position, and the sensor sends a position signal." This embodiment can employ a clamping state detection sensor (pressure sensor) (not shown in the figure): "A pressure sensor (e.g., a thin-film pressure sensor) is embedded in the inner wall of each clamping slot 4 (i.e., the side facing the cardboard side of the packaging box). When the clamping slot 4 clamps the two sides of the cardboard packaging box under the action of the compression spring 63, the pressure sensor detects that the pressure value has reached a preset threshold and sends a clamping confirmation signal; when the electromagnet 23 attracts the clamping slot 4 and opens it against the spring force, the pressure disappears, and the sensor sends a release signal." This embodiment can employ a lifting position detection sensor (limit switch / proximity switch) (not shown in the figure): "On the internal frame of the chassis 1, corresponding to the initial (lowest) position and the highest flip position of the lifting plate 2, limit switches or proximity switches are installed respectively (for example, installed near the top of the guide shaft 3 corresponding to the highest position, and on the bottom plate of the chassis 1 corresponding to the lowest position). When the lifting plate 2 moves to the preset height position under the drive of the lead screw module, the corresponding limit switch or proximity switch is triggered, and a position signal is sent to accurately control the start and end points of the lifting stroke." This embodiment can employ a flip angle detection sensor (rotary encoder): "A rotary encoder is coaxially mounted at one end of the rotating shaft 5 that extends out of the lifting plate 2 (usually the opposite end to the connection end with the drive mechanism 7). The rotary encoder monitors the rotation angle of the rotating shaft 5 in real time and feeds the angle signal back to the control system for precise control of the start and stop positions of the flipping action (such as 0°, 90°, 180°, 360°)." This embodiment can use a push plate position detection sensor (limit switch / proximity switch): "A limit switch or proximity switch is installed near the initial (retracted) position and the fully extended position of the push plate 87, at the corresponding position inside the hoisting frame 85 or the housing 1. It is used to detect whether the push plate 87 is in a safe initial position (to avoid interfering with feeding) and whether the extension action has been completed and reached the unloading position." The working principle of this utility model: 1. Feeding and positioning: The packaging boxes to be assembled (usually stacked flat cardboard) are fed into the front end of the device by the feeding conveyor 8 (roller belt conveyor). When the cardboard box runs under the positioning plate 82, the photoelectric sensor (E3Z-D61) at the lower end of the positioning plate 82 detects the position and sends a signal, triggering the flip plate 83 to intercept and subsequent actions (such as the clamping slot opening command). At this time, the flip plate 83 is in a near-vertical "interception" state (adjustable from 0-90°) under the action of the second hydraulic cylinder 84, preventing the subsequent cardboard from advancing and ensuring that the cardboard at the current station is stacked neatly and in accurate position. At the same time, the clamping mechanism needs to open to prepare to receive the cardboard. 2. The clamping mechanism opens: The control system activates the fourth hydraulic cylinder 22 (mounted on the support 21 of the lifting plate 2). The telescopic end of the fourth hydraulic cylinder 22 extends, pushing the electromagnet 23 at its front end forward. After the electromagnet 23 contacts the metal part (clamping groove body) on the clamping groove 4, it is energized, generating a suction force (1.5kN), firmly holding the clamping groove 4. The telescopic end of the fourth hydraulic cylinder 22 begins to retract. Because the electromagnet 23 is attracted to the clamping groove 4, it overcomes the preload force (200N) of the compression spring 63 in the adjusting assembly 6, pulling the two clamping grooves 4 to move to both sides (away from the center). When the clamping grooves 4 move, the guide rod 62 on them slides in the guide hole of the fixed rod 61 (gap 0.05mm, to ensure stability), causing the clamping grooves 4 to open straight to both sides in the horizontal direction. The distance between the two clamping grooves 4 increases to be sufficient to accommodate the cardboard packaging box to be clamped. 3. The packaging box enters the clamping station: Upon receiving a signal that the clamping slot 4 has opened, the second hydraulic cylinder 84 actuates, driving the tilting plate 83 to rotate upwards and open (0-90°). The feeding conveyor 8 restarts, precisely feeding the multi-layered cardboard packaging boxes previously intercepted and positioned by the tilting plate 83 into the U-shaped space formed by the two open clamping slots 4. The two ends of the cardboard are supported in the U-shaped grooves of the two clamping slots 4 respectively. 4. Clamp the packaging box: After the cardboard box is fully inserted between the two clamping slots 4, the electromagnet 23 is de-energized, causing it to lose its magnetism and release its attraction to the clamping slots 4. The extension end of the fourth hydraulic cylinder 22 fully retracts to its original position. Under the action of the adjusting component 6, the clamping slots 4, now free from the electromagnet's pull, automatically move towards the center (closer to both sides of the cardboard box) along the guide rod 62, under the strong restoring force (preload 200N) of the compression spring 63. The two clamping slots 4 move inward synchronously, firmly clamping both sides of the cardboard box within the U-shaped groove. The continuous elasticity of the compression spring 63 provides a stable clamping force, preventing the cardboard box from slipping or shifting during subsequent lifting or flipping. The guide holes on the guide rod 62 and the fixing rod 61 ensure that the clamping action is linear, stable, and reliable. Only after the pressure sensor on the inner wall of the clamping slot 4 detects that the pressure has reached the threshold and issues a clamping confirmation signal will the system execute subsequent lifting actions. 5. Lifting / lowering: After the clamping action is completed, the control system activates the lead screw module that drives the lifting plate 2. The two lead screw modules drive synchronously, causing the two lifting plates 2 to move vertically along the guide shaft 3 (guided by linear bearings) (rising to the preset height). The guide shaft 3 and linear bearings ensure high precision (±0.1mm) and stability of the lifting motion. Since the clamping slot 4 is mounted on the lifting plate 2 via the rotating shaft 5, the clamping slot 4 and the cardboard box it clamps also rise and fall synchronously to the required working height. When the lifting plate 2 rises to the preset height (initial position or flip position), the limit switch / proximity switch at the corresponding position is triggered, sending a positioning signal, and the lifting action stops. 6. Flip: Once the packaging box is raised to the target height, the drive mechanism 7 activates, extending the telescopic end of the first hydraulic cylinder 76 (fixed to the fixed plate 72). The telescopic end of the first hydraulic cylinder 76 pushes the rack 75, which is hinged to it. The rack 75 is mounted on the slider 74, which moves precisely in a straight line along the guide rail 73 (model HGH20CA). The linear movement of the rack 75 drives the gear 71 meshing with it to rotate. A rotary encoder monitors the angle in real time, and the control system precisely controls the telescopic amount of the first hydraulic cylinder 76 based on the angle signal fed back by the encoder, achieving precise rotation and stopping at the target angle (e.g., 180°). The gear 71 is coaxially fixed to the rotating shaft 5 via a key connection, so the rotation of the gear 71 directly drives the rotation of the rotating shaft 5. The rotation of the rotating shaft 5 is transmitted to the entire adjusting assembly 6 and the clamping slots 4 via the fixed rod 61 (fixed to the middle of the rotating shaft 5). Finally, the two clamping slots 4 and the cardboard boxes they clamp rotate synchronously by 180°. The powerful thrust (5kN) provided by the first hydraulic cylinder 76 and the rack and pinion transmission ensure high torque output (≥300N·m), enabling stable load flipping. 7. Unloading: After the packaging box completes a 180° rotation, the lifting plate 2 can be adjusted to the unloading height according to process requirements. The telescopic end of the fourth hydraulic cylinder 22 begins to extend, causing the electromagnet 23 to contact the side wall of the clamping groove 4. The electromagnet 23 is energized and attracts the clamping groove 4, overcoming the preload (200N) of the compression spring 63 in the adjusting assembly 6, and pulling the two clamping grooves 4 to move to both sides (away from the center). When the clamping groove 4 moves, the guide rod 62 on it slides in the guide hole of the fixed rod 61 (with a gap of 0.05mm to ensure stability), causing the clamping groove 4 to open straight to both sides in the horizontal direction, releasing the cardboard of the packaging box. The control system activates the third hydraulic cylinder 86 (horizontally mounted on the lifting frame 85). The telescopic end of the third hydraulic cylinder 86 extends, pushing the push plate 87 (made of polyurethane to avoid damaging the packaging box) at its front end. When the push plate 87 is extended to the end, it triggers the limit switch / proximity switch, sending an extension completion signal; retracting to the initial position triggers another switch to confirm the reset is complete. The push plate 87 moves horizontally, smoothly pushing the flipped packaging box cardboard out of the U-shaped grooves of the two clamping slots 4. The pushed packaging box slides into the unloading conveyor 9 set at the rear end and is transported to the next assembly station. 8. Reset: After unloading, the third hydraulic cylinder 86 retracts, causing the push plate 87 to reset. The lifting plate 2 drives the lead screw module to move, causing the clamping mechanism to descend to its initial position. The first hydraulic cylinder 76 of the drive mechanism 7 actuates, rotating the clamping slot 4 back to its initial angle (usually 0°, i.e., horizontal support state). When each moving part (lifting plate, tilting plate, push plate) resets to its initial position, it is confirmed by the corresponding limit switch / proximity switch. The device returns to the state of step 1, waiting for the next packaging box to enter, and begins a new cycle. In this utility model: Adaptive clamping: Adjustment component 6 (spring and guide rod) enables clamping slot 4 to adapt to packaging boxes of different widths and provides stable clamping force. High-precision lifting: The dual lead screw module, dual guide shafts, and linear bearings ensure smooth and precise lifting motion (±0.1mm). Powerful rotation: The hydraulic cylinder-driven rack and pinion transmission provides high torque (≥300N·m), enabling stable rotation from 0-360°. Reliable feeding and positioning: Photoelectric sensors and hydraulic flip plates ensure that the packaging box enters the clamping station accurately. Smooth unloading: The horizontal hydraulic cylinder and polyurethane push plate achieve non-destructive pushing. Electromagnet-assisted clamping opening and closing: Utilizing the attraction of an electromagnet and the cooperation of a hydraulic cylinder, the clamping slot is opened by overcoming the spring force when needed, and automatically clamped by the spring force when released. The structure is ingenious and reliable. Modular and rigid: The chassis is made of rectangular steel frame and Q235 steel plate, which ensures overall rigidity and stability and adapts to the production line environment. This invention utilizes the coordinated operation of hydraulics, motors, precision mechanical structures, and sensors to efficiently, accurately, and automatically complete the task of flipping packaging boxes on the assembly line. Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of the invention is indicated by the claims.

[0027] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model.

Claims

1. A flipping device for use on a packaging box assembly line, comprising a housing (1), characterized in that: Two lifting plates (2) are provided on both sides inside the chassis (1). Each lifting plate (2) is slidably mounted on two guide shafts (3). The two guide shafts (3) are fixedly connected to the top plate and bottom plate of the chassis (1) respectively. Two lead screw modules for driving the lifting plates (2) to move vertically are provided on both sides of the two lifting plates (2). Two clamping slots (4) are provided between the two lifting plates (2). A rotating shaft (5) is provided between each clamping slot (4) and the lifting plate (2). One end of the rotating shaft (5) is rotatably connected to the lifting plate (2), and the other end is connected to the lifting plate (2) through an adjustment component (6). A drive mechanism (7) for driving the rotating shaft (5) to rotate is provided on each lifting plate (2).

2. The flipping device for a packaging box assembly line according to claim 1, characterized in that, The drive mechanism (7) includes a gear (71) which is coaxially mounted on the rotating shaft (5). A fixed plate (72) is provided below the gear (71). A guide rail (73) is provided on the fixed plate (72). A slider (74) is provided on the guide rail (73). A rack (75) is provided on the slider (74). A first hydraulic cylinder (76) is provided on one side of the rack (75). The telescopic end of the first hydraulic cylinder (76) is connected to a hinge seat provided on the side wall of the rack (75).

3. A flipping device for a packaging box assembly production line according to claim 1, characterized in that, The adjustment assembly (6) includes a fixed rod (61), the middle part of which is fixedly connected to the rotating shaft (5). Two guide rods (62) are provided at both ends of the fixed rod (61). One end of each guide rod (62) is connected to the clamping groove (4), and the other end is inserted into the guide hole correspondingly provided on the fixed rod (61) for guidance and sliding cooperation. A compression spring (63) is provided between the two guide rods (62). One end of the compression spring (63) is elastically fixedly connected to the fixed rod (61), and the other end is elastically fixedly connected to the clamping groove (4).

4. A flipping device for a packaging box assembly production line according to claim 1, characterized in that, A feeding conveyor (8) is provided at the bottom front end of the chassis (1). A support (81) is provided above the feeding conveyor (8). A positioning plate (82) is provided on the support (81). A flip plate (83) is provided at the lower end of the positioning plate (82). The upper end of one end of the flip plate (83) is hinged to the lower end of the positioning plate (82). A second hydraulic cylinder (84) is provided on the rear side of the positioning plate (82). The fixed end of the second hydraulic cylinder (84) is hinged to the hinge seat on the rear side wall of the positioning plate (82). The telescopic end of the second hydraulic cylinder (84) is hinged to the hinge seat on the side wall of the flip plate (83).

5. A flipping device for a packaging box assembly line according to claim 4, characterized in that, A hoisting frame (85) is provided above the bracket (81). The upper end of the hoisting frame (85) is fixedly connected to the top of the chassis (1), and the lower end is horizontally provided with a third hydraulic cylinder (86). The telescopic end of the third hydraulic cylinder (86) is fixedly connected to the push plate (87).

6. A flipping device for a packaging box assembly line according to claim 1, characterized in that, The rear end of the chassis (1) is equipped with an unloading conveyor (9).

7. A flipping device for a packaging box assembly line according to claim 1, characterized in that, A support (21) is provided on the lifting plate (2), a fourth hydraulic cylinder (22) is provided on the support (21), and an electromagnet (23) is provided at the extension end of the fourth hydraulic cylinder (22).

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