A conveying structure and packaging machine

Abstract

The present invention relates to the field of conveying, and provides a conveying structure and a packaging machine, wherein a conveying structure comprises a frame, a workbench, front and rear cylinders, front and rear slide rails, a pushing device, a flexible connection component, and a pulley component; the workbench is arranged on the frame, and the workbench is used to support the workpiece upward; the fixing parts of the front and rear cylinders are arranged on the frame; the front and rear slide rails extend along the front and rear directions, and the front and rear slide rails are arranged on the frame; the pushing device is arranged on the front and rear slide rails, and the pushing device and the front and rear slide rails can be relatively slidably matched and connected, and the pushing device is used to push the workpiece; one end of the flexible connection component is fixed on the pushing device, and the other end of the flexible connection component is fixed on the frame; the pulley component is arranged on the movable parts of the front and rear cylinders, and the pulley component is used to pull the flexible connection component to drive the pushing device to reciprocate along the front and rear directions.

Description

Technical Field

[0001] The invention relates to the field of conveying, in particular to a conveying structure and a packaging machine. Background Art

[0002] Before packaging relatively fluffy and elastic tissue products such as tissues, sponges and cotton pads (hereinafter referred to as "workpieces"), the workpieces are usually transported over long distances via conveyor belts or conveyor chains. Before compression and packaging, the pusher pushes the workpieces individually to a space separated from the upstream conveyor belt or conveyor chain for compression. This measure is intended to prevent the mechanism compressing the workpiece in the width direction from interfering with the conveyor belt or conveyor chain, and to avoid applying pressure to the workpiece in the height direction to avoid damaging equipment such as conveyor belts.

[0003] At present, when conveying workpieces, the push rod is mainly driven by the synchronous belt assembly to achieve the translational movement of the workpiece. However, the purchase cost of the synchronous belt assembly is relatively high, and after long-term use, the synchronous belt assembly may slip, resulting in inaccurate driving distance. If you choose to use a relatively cheap cylinder for direct drive, when the required pushing distance is longer, the volume of the cylinder will also increase accordingly. This will not only take up more space, but also the cost of the cylinder will be higher. Summary of the invention

[0004] The technical problem to be solved by the present invention is to solve at least one of the technical problems mentioned above.

[0005] The solution of the present invention to solve its technical problem is:

[0006] A conveying structure includes a frame, a workbench, front and rear cylinders, front and rear slide rails, a pushing device, a flexible connection component, and a pulley assembly; the workbench is arranged on the frame, and the workbench is used to support the workpiece upward; the fixing parts of the front and rear cylinders are arranged on the frame; the front and rear slide rails extend along the front and rear directions, and the front and rear slide rails are arranged on the frame; the pushing device is arranged on the front and rear slide rails, and the pushing device and the front and rear slide rails can be relatively slidably connected, and the pushing device is used to push the workpiece; one end of the flexible connection component is fixed to the pushing device, and the other end of the flexible connection component is fixed to the frame; the pulley assembly is arranged on the movable parts of the front and rear cylinders, and the pulley assembly is used to pull the flexible connection component to drive the pushing device to reciprocate along the front and rear directions.

[0007] As a further improvement of the above technical solution, the frame includes a base frame and a top frame fixed on the base frame, the workbench is arranged on the base frame, and the front and rear cylinders, the front and rear slide rails, the flexible connection assembly and the pulley assembly are respectively arranged on the top frame.

[0008] As a further improvement of the above technical solution, the front and rear cylinders include front and rear cylinder bodies, a sliding frame and a roller, the sliding frame is fixed on the movable part of the front and rear cylinders, the fixed part of the front and rear cylinder bodies is fixed on the frame, the roller is arranged on the sliding frame, the roller presses downward against the frame to support the frame, and the pulley assembly is arranged on the sliding frame.

[0009] As a further improvement of the above technical solution, the pulley assembly includes a first sprocket, which is arranged on the movable part of the front and rear cylinders, and the first sprocket and the movable parts of the front and rear cylinders can rotate relative to each other, and the flexible connection assembly includes a chain, one end of the chain is connected to the pushing device, and the other end of the chain is connected to the frame, and the chain is wrapped around the front side of the first sprocket, and the first sprocket and the chain are meshed.

[0010] As a further improvement of the above technical solution, the pulley assembly also includes a first fixed pulley, a second fixed pulley and a first movable pulley, the flexible connection assembly includes a connecting rope, the first movable pulley is arranged on the movable part of the front and rear cylinders, the first fixed pulley and the second fixed pulley are respectively arranged on the frame, the first fixed pulley is arranged in front of the second fixed pulley, the front end of the connecting rope is fixedly connected to the frame, the rear end of the connecting rope is sequentially wrapped around the rear side of the first movable pulley, the front side of the first fixed pulley and the rear side of the second fixed pulley, the rear end of the connecting rope is fixedly connected to the pushing device, the fixing point of the connecting rope and the pushing device is called a connecting part, and the connecting part is located between the first fixed pulley and the second fixed pulley.

[0011] As a further improvement of the above technical solution, the pushing device includes front and rear sliders, a pushing rack, an up and down movement mechanism and a pushing mechanism, the front and rear sliders are arranged on the front and rear slide rails, the front and rear sliders and the front and rear slide rails can be relatively slidably connected, one end of the flexible connection component is fixedly connected to the front and rear sliders, the up and down movement mechanism is arranged on the front and rear sliders, the pushing rack is arranged on the up and down movement mechanism, the up and down movement mechanism drives the pushing rack to reciprocate along the up and down directions, the pushing mechanism is fixed on the pushing rack, and the pushing mechanism is used to push the workpiece.

[0012] As a further improvement of the above technical solution, the up and down movement mechanism includes upper and lower cylinders, upper and lower sliders and upper and lower slide rails, the upper and lower slide rails are fixed to the pushing rack, the upper and lower sliders are arranged on the upper and lower slide rails, the upper and lower sliders and the upper and lower slide rails can slide up and down relative to each other, the upper and lower cylinders are fixed to the front and rear sliders, the upper and lower sliders are fixedly connected to the front and rear sliders, and the movable parts of the upper and lower cylinders are fixedly connected to the pushing rack to drive the pushing rack to move up and down.

[0013] As a further improvement of the above technical solution, the pushing mechanism includes a pushing plate, a pushing cylinder, a pressing cylinder and a pressure block. The pushing plate and the pushing frame are fixedly connected, and the fixed part of the pushing cylinder is fixed on the pushing frame or the pushing plate. The pushing plate is used to push the workpiece, and a avoidance hole that penetrates the thickness of the pushing plate is opened on the pushing plate. The movable part of the pushing cylinder passes through the avoidance hole to push the workpiece to make the workpiece separate from the pushing plate, and the pressure block is hinged to the pushing plate, one end of the pressing cylinder is hinged to the pressure block, and the other end of the pressing cylinder is hinged to the pushing plate, and the pressing cylinder drives the pressure block to swing up and down around the hinge between the pushing plate and the pressure block, so that the pressure block can clamp the workpiece downward.

[0014] As a further improvement of the above technical solution, the conveying structure also includes a pressing cylinder, a connecting rod and a lower pressure plate. The fixed part of the pressing cylinder is fixed on the frame. The frame is provided with a slide groove extending in the up and down directions. The connecting rod is inserted into the slide groove. The connecting rod and the slide groove can slide relative to each other. The pressing cylinder drives the connecting rod to move up and down. The lower pressure plate is fixedly connected to the connecting rod. The lower pressure plate is arranged downstream of the pushing device. The lower pressure plate is used to press the workpiece downward.

[0015] As a further improvement of the above technical solution, the conveying structure also includes a left clamping block, a right clamping block, a left screw rod, a right screw rod, a left slide rail, a right slide rail and a driving motor, the left slide rail and the right slide rail are respectively fixed on the frame, the left slide rail and the right slide rail both extend in the left and right directions, a clamping space is arranged between the left sliding block and the right clamping block, the left screw rod and the right screw rod are coaxially connected, the driving motor is arranged on the frame, the left clamping block is threadedly matched with the left screw rod, and the right clamping block is threadedly matched with the right screw rod, the threads on the left screw rod and the right screw rod have opposite rotation directions, and the driving motor drives the left screw rod and the right screw rod to rotate, so that the left clamping block and the right clamping block move toward or away from each other, thereby adjusting the width of the clamping space, and the pushing device can push the workpiece through the clamping space.

[0016] As a further improvement of the above technical solution, the conveying structure also includes a first conveying chain assembly and multiple shifting rods, all of the shifting rods are respectively fixedly connected to the conveying chains in the first conveying chain assembly, the shifting rods are used to move the workpiece, and the pushing device is arranged downstream of the first conveying chain assembly.

[0017] As a further improvement of the above technical solution, the conveying structure also includes an upper protective baffle, a lower protective baffle, a plurality of upper guide rods and a plurality of lower guide rods, all of the upper guide rods and all of the lower guide rods extend in the left-right direction, all of the upper guide rods and all of the lower guide rods are slidably connected to the frame in the left-right direction, all of the upper guide rods are fixedly connected to the upper protective baffle, all of the lower guide rods are fixedly connected to the lower protective baffle, the upper protective baffle is arranged above the lower protective baffle, so that a gap is formed between the upper protective baffle and the lower protective baffle, the shift rod passes through the gap, and the upper protective baffle and the lower protective baffle are arranged between the workpiece and the first conveying chain assembly.

[0018] The present invention also provides a packaging machine, which includes the conveying structure in any of the above technical solutions.

[0019] The beneficial effect of the present invention is that when the workpiece is placed on the workbench, the pulley assembly arranged on the movable part of the front and rear cylinders moves accordingly under the telescopic movement of the front and rear cylinders. Since the two ends of the flexible connection assembly are respectively connected to the frame and the pusher device, the pulley assembly will also pull the flexible connection assembly, thereby driving the pusher device to reciprocate along the front and rear slide rails. Thus, a movable pulley mechanism is formed between the pulley assembly and the flexible connection assembly. Since the front and rear cylinders directly drive the pulley assembly to move forward and backward, the movable pulley mechanism formed between the pulley assembly and the flexible connection assembly is equivalent to a "labor-intensive lever", so that the actual stroke of the pusher device is greater than the stroke of the front and rear cylinders, which can effectively reduce the space occupied by the front and rear cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of a conveying structure according to an embodiment of the present invention.

[0021] Figure 2 The present invention Figure 1 Axonometric view of the section at AA in .

[0022] Figure 3 It is an axonometric view of a conveying structure according to an embodiment of the present invention.

[0023] Figure 4 It is a top view of a conveying structure according to an embodiment of the present invention, in which the right side of the top surface of the conveying structure is partially cut to form a broken cross-sectional view.

[0024] Figure 5 It is an axonometric view of a material pushing mechanism according to an embodiment of the present invention.

[0025] In the accompanying drawings: 1-frame, 11-top frame, 12-bottom frame, 13-workbench, 21-front and rear cylinder body, 22-sliding frame, 23-roller, 3-front and rear slide rails, 4-pushing device, 41-front and rear sliders, 42-pushing frame, 43-upper and lower movement mechanism, 431-upper and lower cylinders, 432-upper and lower sliders, 433-upper and lower slide rails, 44-pushing mechanism, 441-pushing plate, 442-pushing cylinder, 443-downward pressure cylinder, 444-pressing block, 5-flexible connection assembly, 501-connecting rope and The fixed end of the frame, 502-chain and the fixed end of the frame, 51-connecting rope, 52-chain, 6-pulley assembly, 61-first sprocket, 62-first fixed pulley, 63-second fixed pulley, 64-first movable pulley, 71-pressing cylinder, 72-connecting rod, 73-lower pressing plate, 81-left clamping block, 82-right clamping block, 83-left slide rail, 84-right slide rail, 85-left screw rod, 86-right screw rod, 91-upper guard plate, 92-lower guard plate, 93-upper guide rod, 94-lower guide rod, 10-shift rod. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the above briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0027] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the present invention can be combined interchangeably without conflicting with each other.

[0028] Before packaging fluffy and elastic paper products such as tissues, sponges and cotton pads (hereinafter referred to as "workpieces"), these workpieces are usually transported over long distances via conveyor belts or conveyor chains. Before compression and packaging, the pusher pushes the workpieces individually into a space separated from the upstream conveyor belt or conveyor chain for compression. The purpose of this measure is to prevent the mechanism that compresses the workpiece in the width direction from interfering with the conveyor belt or conveyor chain, and to avoid applying pressure to the workpiece in the height direction to avoid damaging equipment such as the conveyor belt.

[0029] At present, in the process of conveying workpieces, synchronous belt assemblies are mainly used to drive push rods to achieve translational movement of workpieces. However, the procurement cost of synchronous belt assemblies is relatively expensive, and they may slip during long-term use, which will lead to inaccurate driving distance. On the other hand, if a lower-cost cylinder is chosen for direct drive, the volume of the cylinder will increase when the required pushing distance is longer. This will not only take up more space, but also increase the cost of the cylinder accordingly.

[0030] For this reason, Figures 1 to 5 As shown, the present invention provides a conveying structure, which includes a frame 1, a workbench 13, front and rear cylinders, front and rear slide rails 3, a pushing device 4, a flexible connection component 5, and a pulley assembly 6; the workbench 13 is arranged on the frame 1, and the workbench 13 is used to support the workpiece upward; the fixed parts of the front and rear cylinders are arranged on the frame 1; the front and rear slide rails 3 extend along the front and rear directions, and the front and rear slide rails 3 are arranged on the frame 1; the pushing device 4 is arranged on the front and rear slide rails 3, and the pushing device 4 and the front and rear slide rails 3 can be relatively slidably matched and connected, and the pushing device 4 is used to push the workpiece; one end of the flexible connection component 5 is fixed on the pushing device 4, and the other end of the flexible connection component 5 is fixed on the frame 1; the pulley assembly 6 is arranged on the movable parts of the front and rear cylinders, and the pulley assembly 6 is used to pull the flexible connection component 5 to drive the pushing device 4 to reciprocate along the front and rear directions.

[0031] From the above, it can be seen that when the workpiece is placed on the workbench 13, the pulley assembly 6 set in the movable part of the front and rear cylinders moves accordingly under the telescopic movement of the front and rear cylinders. Since the two ends of the flexible connection assembly 5 are respectively connected to the frame 1 and the pusher 4, the pulley assembly 6 will also pull the flexible connection assembly 5, thereby driving the pusher 4 to reciprocate along the front and rear slide rails 3. Therefore, a movable pulley mechanism is formed between the pulley assembly 6 and the flexible connection assembly 5. Since the front and rear cylinders directly drive the pulley assembly 6 to move forward and backward, the movable pulley mechanism formed between the pulley assembly 6 and the flexible connection assembly 5 is equivalent to a "labor-intensive lever", so that the actual stroke of the pusher 4 is greater than the stroke of the front and rear cylinders.

[0032] In other words, the pulley assembly 6 is arranged on the movable part of the front and rear cylinders, and the pulley assembly 6 is driven to move forward and backward by the telescopic movement of the front and rear cylinders. One end of the flexible connection assembly 5 (such as a chain 52, a connecting rope 51, etc.) is fixed to the pusher 4, and the other end is fixed to the frame 1. The pulley assembly 6 drives the pusher 4 by pulling the flexible connection assembly 5. When the pulley assembly 6 moves, the pusher 4 will reciprocate along the front and rear slide rails 3 due to the change in the relative position between the fixed end and the movable end of the flexible connection assembly 5.

[0033] Next, the combination of the pulley assembly 6 and the flexible connection assembly 5 forms a movable pulley mechanism, which is equivalent to a laborious lever in mechanics. In the laborious lever, the power arm (i.e., the stroke of the front and rear cylinders) is short, while the resistance arm (i.e., the actual stroke of the pusher 4) is long. This means that although the cylinder needs to provide a large driving force, a large displacement can be generated on the pusher 4 through the lever action.

[0034] Next, the workbench 13 is used to support the workpiece. The front and rear slide rails 3 ensure the stability and linearity of the pusher 4 during movement. The front and rear cylinders provide a power source, which is converted into a reciprocating motion of the pusher 4 through the transmission of the pulley assembly 6 and the flexible connection assembly 5.

[0035] By combining the movable pulley mechanism and the lever principle, the actual stroke of the pusher 4 is greater than the stroke of the front and rear cylinders, thereby achieving the purpose of pushing the workpiece over a long distance with a smaller cylinder stroke. Since there is no need to use a large cylinder or electric cylinder to directly drive the pusher 4, space is saved and costs are reduced. The introduction of the front and rear slide rails 3 ensures the stability and linearity of the pusher 4 during movement, improving the reliability of the entire conveying structure.

[0036] Considering the need to improve the stability and rigidity of the conveying structure, optimize the spatial layout, and facilitate adjustment and maintenance. In one embodiment, the frame 1 includes a bottom frame 12 and a top frame 11 fixed to the bottom frame 12, a workbench 13 is arranged on the bottom frame 12, and front and rear cylinders, front and rear slide rails 3, a flexible connection assembly 5 and a pulley assembly 6 are respectively arranged on the top frame 11.

[0037] The combined design of the bottom frame 12 and the top frame 11 conforms to the layered load-bearing principle in structural mechanics. The bottom frame 12, as the main load-bearing structure, transfers the load to the ground; the top frame 11, as the secondary load-bearing structure, supports and fixes the drive and transmission components to ensure that they can operate stably and accurately during operation.

[0038] Dividing the rack 1 into two parts, the base frame 12 and the top frame 11, is a modular design concept. This design allows for better interchangeability and maintainability between components. When a component fails or needs to be upgraded, the component can be directly replaced or upgraded without making large-scale changes to the entire rack 1. The rack 1 is designed as a two-layer structure of a base frame 12 and a top frame 11. This layered design helps to enhance the stability and rigidity of the entire rack 1. The base frame 12 serves as the basic support and bears the main load; the top frame 11 is used to install and support key components such as the front and rear cylinders, front and rear slide rails 3, flexible connection assembly 5 and pulley assembly 6 to ensure their stability and precision during operation.

[0039] By setting the workbench 13 on the bottom frame 12 and the driving and transmission components on the top frame 11, the space is optimized. This layout not only avoids the spatial conflict between the components, but also makes the entire conveying structure more compact and efficient. The spatial layout can be optimized, and the workbench 13 is set on the bottom frame 12 to provide a stable support platform for the workpiece. The driving and transmission components such as the front and rear cylinders, front and rear slide rails 3, flexible connection components 5 and pulley components 6 are set on the top frame 11. This layout prevents the components from interfering with each other, which is convenient for installation, debugging and maintenance.

[0040] The layered design makes it easier to adjust and maintain the components on the top frame 11. For example, when it is necessary to adjust the stroke of the front and rear cylinders or replace the flexible connection assembly 5, the operator can operate directly on the top frame 11 without making extensive changes to the workbench 13 or the bottom frame 12.

[0041] In order to effectively reduce the vertical loads borne by the front and rear cylinders and improve the working efficiency of the front and rear cylinders, in one embodiment, the front and rear cylinders include a front and rear cylinder body 21, a sliding frame 22 and a roller 23, the sliding frame 22 is fixed to the movable part of the front and rear cylinders, the fixed part of the front and rear cylinder body 21 is fixed to the frame 1, the roller 23 is arranged on the sliding frame 22, the roller 23 is pressed downward against the frame 1 to support the sliding frame 22, and the pulley assembly 6 is arranged on the sliding frame 22. In actual use, the fixed ends of the front and rear cylinder bodies 21 are fixed to the frame 1.

[0042] The front and rear cylinder bodies 21 serve as a power source and are responsible for generating the driving force required by the pusher device 4. The slide frame 22 is fixed to the movable parts of the front and rear cylinders and moves with the extension and contraction of the cylinders. This design enables the driving force of the cylinders to be directly transmitted to the slide frame 22, and then drives the pusher device 4 through the pulley assembly 6 and the flexible connection assembly 5.

[0043] The roller 23 is arranged on the sliding frame 22 and is pressed against the frame 1 downwards to support the pulley frame. This design not only shares the weight of the cylinder and the sliding frame 22, but also reduces the motion resistance through rolling friction, thereby improving the smoothness and efficiency of the motion.

[0044] The pulley assembly 6 is arranged on the sliding frame 22 and connected to the flexible connection assembly 5. When the cylinder is extended and retracted, the sliding frame 22 drives the pulley assembly 6 to move, and then drives the pusher device 4 through the flexible connection assembly 5. This integrated design simplifies the transmission structure, reduces the connection and friction between components, and improves the reliability and efficiency of the transmission.

[0045] The combination of the sliding frame 22 and the cylinder body and the supporting function of the roller 23 together enhance the stability and rigidity of the entire cylinder assembly, so that the cylinder can maintain stable and accurate movement during the driving process. The rolling friction of the roller 23 reduces the resistance of the cylinder assembly when it moves, making the movement smoother. The integrated design of the pulley assembly 6 simplifies the transmission structure, reduces the energy loss during the movement, and improves the transmission efficiency.

[0046] The integrated design of the pulley assembly 6 reduces the connection and friction between components, reduces the failure rate and maintenance cost. When it is necessary to adjust the cylinder stroke or replace the flexible connection assembly 5, the operator can operate directly on the sliding frame 22 without making large-scale changes to the entire cylinder assembly.

[0047] In one embodiment, the pulley assembly 6 includes a first sprocket 61, which is arranged on the movable parts of the front and rear cylinders, and the first sprocket 61 and the movable parts of the front and rear cylinders can rotate relative to each other. The flexible connection assembly 5 includes a chain 52, one end of the chain 52 is connected to the pusher device 4, and the other end of the chain 52 is connected to the frame 1. The chain 52 passes through the front side of the first sprocket 61, and the first sprocket 61 and the chain 52 are meshed. The first sprocket 61 is arranged on the movable parts of the front and rear cylinders, but the two are designed to rotate relative to each other. This means that when the movable part of the cylinder is extended or retracted, the first sprocket 61 can move with it, but at the same time maintain its own rotation ability so as to mesh with the chain 52 for transmission. The chain 52 is one of the flexible connection assemblies 5, one end of which is connected to the pusher device 4, and the other end is connected to the frame 1. This design enables the chain 52 to transmit the driving force of the movable part of the cylinder, while adapting to the relative position change between the pusher device 4 and the frame 1.

[0048] The chain 52 passes through the front side of the first sprocket 61 and meshes with the first sprocket 61, so that when the movable part of the cylinder is driven forward, the first sprocket 61 can push the chain 52 forward. When the first sprocket 61 rotates, its teeth mesh with the links of the chain 52, thereby driving the chain 52 to move. This meshing transmission method has the characteristics of large transmission force, accurate transmission, and smooth operation.

[0049] In some embodiments, the first sprocket 61 is mounted on the sliding frame 22 , and the first sprocket 61 and the sliding frame 22 are connected via a rotating shaft, so that the first sprocket 61 and the sliding frame 22 can rotate relative to each other.

[0050] Optionally, two first sprockets 61 are provided, and the two first sprockets 61 are arranged along the left and right sides, and the two first sprockets 61 are both installed on the movable parts of the front and rear cylinders. For example, the two first sprockets 61 are both installed on the sliding frame 22, and the two first sprockets 61 are engaged with the same chain 52 mentioned above.

[0051] The two first sprockets 61 are respectively arranged on the left and right sides of the front and rear cylinder movable parts, and are both engaged with the chain 52. When the front and rear cylinder movable parts are moved by the driving force, the two first sprockets 61 will rotate synchronously, thereby pushing the chain 52 to move forward. The chain 52 passes through the front sides of the two first sprockets 61 and is tightly engaged with them. This design not only ensures the stability of the chain 52 during the transmission process, but also reduces the shaking and sagging of the chain 52 through the supporting effect of the two sprockets. The driving force generated by the cylinder movable part is evenly transmitted to the chain 52 through the two first sprockets 61. This force transmission method not only improves the efficiency of the transmission, but also reduces the force on a single sprocket and the chain 52 by dispersing the load, thereby extending their service life.

[0052] Considering that after the movable parts of the front and rear cylinders carry the pusher 4 forward, when the front and rear cylinders move backward, it is also necessary to make the pusher 4 move backward and reset. In one embodiment, the pulley assembly 6 also includes a first fixed pulley 62, a second fixed pulley 63, and a first movable pulley 64, and the flexible connection assembly 5 includes a connecting rope 51, the first movable pulley 64 is arranged on the movable parts of the front and rear cylinders, the first fixed pulley 62 and the second fixed pulley 63 are respectively arranged on the frame 1, the first fixed pulley 62 is arranged in front of the second fixed pulley 63, the front end of the connecting rope 51 is fixedly connected to the frame 1, the rear end of the connecting rope 51 is successively wound around the rear side of the first movable pulley 64, the front side of the first fixed pulley 62 and the rear side of the second fixed pulley 63, the rear end of the connecting rope 51 is fixedly connected to the pusher 4, and the fixing point of the connecting rope 51 and the pusher 4 is called a connecting part, and the connecting part is located between the first fixed pulley 62 and the second fixed pulley 63. The first movable pulley 64 is mounted on the movable part of the front and rear cylinders and moves with the extension and retraction of the front and rear cylinders. The first fixed pulley 62 and the second fixed pulley 63 are mounted on the frame 1 as fixed fulcrums, and the first fixed pulley 62 is located in front of the second fixed pulley 63. The front end of the connecting rope 51 is fixed to the frame 1, and the rear end passes through the first movable pulley 64, the first fixed pulley 62 and the second fixed pulley 63 through a carefully designed path, and is finally connected to the pusher 4.

[0053] When the front and rear cylinders move backward, since the fixed end of the connecting rope 51 is connected to the frame 1 and bypasses the first movable pulley 64, the first fixed pulley 62 and the second fixed pulley 63, the backward movement of the first movable pulley 64 will push the pusher 4 to reset backward through the connecting rope 51. In combination with certain embodiments, when the movable part of the front and rear cylinders is driven to move forward, the two first sprockets 61 will rotate synchronously, thereby pushing the chain 52 to move forward. The front and rear cylinders, the front and rear slide rails 3, the flexible connection assembly 5 and the pulley assembly 6 can realize the forward and backward reciprocating motion of the pusher 4.

[0054] Considering that workpieces of different thicknesses need to be transported, in one embodiment, the pusher device 4 includes a front and rear slider 41, a pusher rack 42, an up and down motion mechanism 43 and a pusher mechanism 44. The front and rear sliders 41 are arranged on the front and rear slide rails 3, and the front and rear sliders 41 and the front and rear slide rails 3 can be relatively slidably matched and connected. One end of the flexible connection component 5 is fixedly connected to the front and rear sliders 41, and the up and down motion mechanism 43 is arranged on the front and rear sliders 41. The pusher rack 42 is arranged on the up and down motion mechanism 43, and the up and down motion mechanism 43 drives the pusher rack 42 to reciprocate along the up and down directions. The pusher mechanism 44 is fixed on the pusher rack 42, and the pusher mechanism 44 is used to push the workpiece. The front and rear sliders 41 are arranged on the front and rear slide rails 3, and the two are relatively slidably matched and connected, so that the front and rear sliders 41 can move smoothly in a straight line along the front and rear slide rails 3. One end of the flexible connection component 5 (such as the previous connecting rope 51 or chain 52, etc.) is fixedly connected to the front and rear sliders 41. By pulling the flexible connection component 5, the front and rear sliders 41 and the components thereon can be driven to move along the front and rear directions.

[0055] The up-down movement mechanism 43 is arranged on the front and rear sliders 41, and the up-down movement mechanism 43 can generate a driving force in the up-down direction. The pusher 42 is installed on the up-down movement mechanism 43, so it can reciprocate in the up-down direction with the driving of the up-down movement mechanism 43. This design enables the pusher 42 to adjust its height as needed to accommodate workpieces of different heights or thicknesses.

[0056] The push mechanism 44 is fixed on the push frame 42 and moves with the movement of the push frame 42. When the push frame 42 moves to an appropriate position, the push mechanism 44 starts to work and pushes the workpiece to move or position. The design of the push mechanism 44 can be customized according to the characteristics of the workpiece and the pushing requirements to ensure the accuracy and stability of the pushing.

[0057] In some embodiments, the front and rear sliders 41 are provided with a clamping device, which includes a clamping seat and a clamping block fixed to the front and rear sliders 41, the clamping block and the clamping seat are connected by screws, and the clamping block and the clamping seat are used to clamp the connecting rope 51. In addition, the clamping seat is also provided with a chain clamp, which is used to clamp the chain 52 to achieve fixation between the chain 52 and the clamping seat.

[0058] In some embodiments, two front and rear cylinders, two flexible connection components 5, and two pulley components 6 are respectively provided, and the front and rear cylinders, the flexible connection components 5, and the pulley components 6 are provided one by one, and the two front and rear cylinders, the two flexible connection components 5, and the two pulley components 6 are respectively provided as mirror images of each other, and the pusher device 4 is provided between the two front and rear cylinders, that is, the two front and rear cylinders are respectively provided on the left and right sides of the pusher device 4. In actual use, the two front and rear cylinders work synchronously.

[0059] The two front and rear cylinders are respectively arranged on the left and right sides of the pusher 4, forming a mirror-symmetrical layout. When the two cylinders work simultaneously, they respectively apply thrust or pull force to the pusher 4 through their respective piston rods, thereby driving the pusher 4 to move in the front-back direction. This double-side drive design ensures the stability and balance of the pusher 4 during movement.

[0060] Each front and rear cylinder is connected to the pusher 4 through a corresponding flexible connection assembly 5. The flexible connection assembly 5 can transmit the thrust or pull of the cylinder, while allowing a certain degree of flexibility to accommodate slight deviations or unevenness of the pusher 4 during movement. The mirror-image flexible connection assembly 5 ensures that the pusher 4 is subjected to balanced forces on the left and right sides, further improving the stability of movement.

[0061] The up-down movement mechanism 43 is used to drive the pusher 42 to move up and down. In one embodiment, the up-down movement mechanism 43 includes an up-down cylinder 431, an up-down slider 432 and an up-down slide rail 433. The up-down slide rail 433 is fixed to the pusher 42. The up-down slider 432 is arranged on the up-down slide rail 433. The up-down slider 432 and the up-down slide rail 433 can slide up and down relatively. The up-down cylinder 431 is fixed to the front and rear sliders 41. The up-down slider 432 is fixedly connected to the front and rear sliders 41. The movable part of the up-down cylinder 431 is fixedly connected to the pusher 42 to drive the pusher 42 to move up and down. The up-down cylinder 431 is used as a power source to generate a driving force through the extension and contraction of its piston rod. The fixed part of the up-down cylinder 431 is installed on the front and rear sliders 41, which ensures that the up-down cylinder 431 moves forward and backward with the front and rear sliders 41, so that its position is stable. The up-down slide rail 433 is fixed to the pusher 42, providing a stable guide path for the up-down slider 432. The upper and lower sliders 432 are arranged on the upper and lower slide rails 433, and the cooperation between the two allows the sliders to slide smoothly in the up and down directions along the slide rails.

[0062] The upper and lower sliders 432 are fixedly connected to the front and rear sliders 41. This design enables the driving force of the upper and lower cylinders 431 to be transmitted to the front and rear sliders 41, and then through the coordinated movement of the overall structure, the pusher rack 42 is driven to reciprocate in the up and down direction. The movable parts of the upper and lower cylinders 431 are fixedly connected to the pusher rack 42. When the piston rod of the cylinder is extended or retracted, the pusher rack 42 is directly driven to move up and down.

[0063] In addition, the up-and-down movement mechanism 43 can also use electric screw rods, electric cylinders, etc. to drive the pusher rack 42 to move up and down.

[0064] The pushing mechanism 44 is used for pushing. In one embodiment, the pushing mechanism 44 includes a pushing plate 441, a pushing cylinder 442, a pressing cylinder 443 and a pressing block 444. The pushing plate 441 is fixedly connected to the pushing frame 42. The fixed part of the pushing cylinder 442 is fixed on the pushing frame 42 or the pushing plate 441. The pushing plate 441 is used to push the workpiece. A avoidance hole that runs through the thickness of the pushing plate 441 is provided on the pushing plate 441. The movable part of the pushing cylinder 442 passes through the avoidance hole to push the workpiece so that the workpiece is separated from the pushing plate 441. The pressing block 444 is hinged to the pushing plate 441, one end of the pressing cylinder 443 is hinged to the pressing block 444, and the other end of the pressing cylinder 443 is hinged to the pushing plate 441. The pressing cylinder 443 drives the pressing block 444 to swing up and down around the hinge between the pushing plate 441 and the pressing block 444, so that the pressing block 444 can clamp the workpiece downward.

[0065] The fixed part of the push cylinder 442 is installed on the push rack 42 or the push plate 441 to provide power for the push mechanism 44. The push plate 441 is fixedly connected to the push rack 42 and serves as the main contact surface for pushing the workpiece. The avoidance hole opened on the push plate 441 allows the movable part of the push cylinder 442 to pass through and directly act on the workpiece to push the workpiece.

[0066] The pressing block 444 is connected to the push plate 441 by a hinge, allowing the pressing block 444 to swing up and down around the hinge point. One end of the pressing cylinder 443 is hinged to the push plate 441, and the other end is hinged to the pressing block 444, forming a lever mechanism. The telescopic movement of the pressing cylinder 443 drives the pressing block 444 to swing around the hinge point through the lever action, realizing the up and down movement of the pressing block 444, thereby clamping or releasing the workpiece.

[0067] In actual use, the hinge of the pressing block 444 and the push plate 441 is located between the hinge of the pressing cylinder 443 and the pressing block 444 and the pressing end of the pressing block 444. This design enables the pressing block 444 to swing downward more effectively using the lever principle when the pressing cylinder 443 is extended, thereby pressing the workpiece downward.

[0068] The workpiece is pressed downward by the pressing block 444 so that when the push plate 441 pushes the workpiece, the workpiece will not slide relative to the push plate 441 .

[0069] In one embodiment, the conveying structure also includes a pressing cylinder 71, a connecting rod 72 and a lower pressure plate 73. The fixed part of the pressing cylinder 71 is fixed on the frame 1. The frame 1 is provided with a slide groove extending in the up and down directions. The connecting rod 72 is inserted in the slide groove. The connecting rod 72 and the slide groove can slide relative to each other. The pressing cylinder 71 drives the connecting rod 72 to move up and down. The lower pressure plate 73 is fixedly connected to the connecting rod 72. The lower pressure plate 73 is arranged at the conveying downstream of the pushing device 4, and the lower pressure plate 73 is used to press the workpiece downward.

[0070] The fixed part of the pressing cylinder 71 is installed on the frame 1, serving as the power source of the entire mechanism. When the cylinder receives a compression signal, its piston rod will contract, thereby generating downward pressure. The connecting rod 72 is inserted into the slide groove extending in the up and down direction on the frame 1, and maintains a relative sliding relationship with the slide groove. This design allows the connecting rod 72 to move freely in the vertical direction while maintaining a stable guide. When the piston rod of the pressing cylinder 71 is extended or retracted, it pushes or pulls the connecting rod 72 to move up and down along the slide groove. The lower pressing plate 73 is fixedly connected to the connecting rod 72, so when the connecting rod 72 moves up and down, the lower pressing plate 73 will also move accordingly. The lower pressing plate 73 is arranged downstream of the conveying of the pushing device 4, and the lower pressing plate 73 is used to compress the workpiece.

[0071] When the workpiece needs to be compressed, the press cylinder 71 pushes the connecting rod 72 to slide downward along the slide slot, thereby driving the lower pressing plate 73 to move downward, applying pressure to the workpiece below the lower pressing plate 73 to achieve a compression effect. After the compression is completed, the press cylinder 71 drives the lower pressing plate 73 to rise through the connecting rod 72, returns to the initial position, and prepares for the next compression operation.

[0072] In some embodiments, two of each of the press cylinder 71, the connecting rod 72 and the lower pressing plate 73 are provided, and the press cylinder 71, the connecting rod 72 and the lower pressing plate 73 are mirror images of each other. The lower pressing plate 73 is provided in an inverted L shape. A compression channel is formed between the two lower pressing plates 73 and between the workbench 13, and the workpiece passes through the compression channel.

[0073] The avoidance hole provided on the push plate 441 allows the movable part of the push cylinder 442 to pass through and directly act on the workpiece to push the workpiece. The push cylinder 442 can be used as a further backup solution to avoid inaccurate position adjustment of the push plate 441. The push cylinder 442 can be used to push the workpiece away from the workbench. For example, after the workpiece is compressed, the movable part of the push cylinder 442 pushes the workpiece, so that the workpiece moves forward and leaves the bottom of the lower pressing plate 73, thereby unloading the workpiece.

[0074] In one embodiment, the conveying structure also includes a left clamping block 81, a right clamping block 82, a left screw rod 85, a right screw rod 86, a left slide rail 83, a right slide rail 84 and a driving motor. The left slide rail 83 and the right slide rail 84 are respectively fixed on the frame 1, and the left slide rail 83 and the right slide rail 84 extend in the left and right directions. A clamping space is set between the left slider and the right clamping block 82, and the left screw rod 85 and the right screw rod 86 are coaxially connected. The driving motor is set on the frame 1, the left clamping block 81 and the left screw rod 85 are threadedly matched, and the right clamping block 82 and the right screw rod 86 are threadedly matched. The threads on the left screw rod 85 and the right screw rod 86 rotate in opposite directions. The driving motor drives the left screw rod 85 and the right screw rod 86 to rotate, so that the left clamping block 81 and the right clamping block 82 move toward or away from each other, and the width of the clamping space is adjusted. The pushing device 4 can push the workpiece through the clamping space. The left slide rail 83 and the right slide rail 84 are respectively fixed on the frame 1 and extend in the left and right directions. The left clamping block 81 and the right clamping block 82 are respectively arranged on the left slide rail 83 and the right slide rail 84 and can slide smoothly left and right along the slide rails. This design ensures the stability and linearity of the clamping block during movement.

[0075] The left screw rod 85 and the right screw rod 86 are connected by coaxial transmission, which means that they rotate synchronously. The left clamping block 81 is threadedly matched with the left screw rod 85, and the right clamping block 82 is also threadedly matched with the right screw rod 86. Moreover, the threads on the left screw rod 85 and the right screw rod 86 are rotated in opposite directions. Therefore, when the driving motor drives the left screw rod 85 and the right screw rod 86 to rotate, the left clamping block 81 and the right clamping block 82 will move relative to each other along the screw rods, that is, both move back to the middle or the left and right sides at the same time.

[0076] The driving motor serves as a power source, and its rotational motion drives the left screw rod 85 and the right screw rod 86 to rotate synchronously. By controlling the rotation direction and speed of the driving motor, the relative position between the left clamping block 81 and the right clamping block 82 can be accurately adjusted, thereby changing the width of the clamping space. In actual use, the left screw rod 85 and the right screw rod 86 are connected by a connecting shaft, and the connecting shaft and the output shaft of the driving motor are driven by a synchronous belt or a transmission chain.

[0077] In one embodiment, the conveying structure further includes a first conveying chain assembly and a plurality of levers 10, all of which are fixedly connected to the conveying chains in the first conveying chain assembly, and the levers 10 are used to move the workpieces, and the pushing device 4 is arranged downstream of the first conveying chain assembly. The levers 10 are fixedly connected to the conveying chain and move with the movement of the conveying chain. The shape and position design of the levers 10 enable it to effectively move the workpieces, ensuring that the workpieces move according to a predetermined path and rhythm during the conveying process. The pushing device 4 is arranged downstream of the first conveying chain assembly, and when the workpiece is conveyed to the position of the pushing device 4, the pushing device 4 starts to work.

[0078] In addition, in some embodiments, the push rack 42 is installed on the up-and-down motion mechanism 43 , so it can reciprocate in the up-and-down direction as the up-and-down motion mechanism 43 is driven, and can play the role of avoiding the lever 10 .

[0079] In one embodiment, the conveying structure also includes an upper protective baffle, a lower protective baffle, a plurality of upper guide rods 93 and a plurality of lower guide rods 94, all of the upper guide rods 93 and all of the lower guide rods 94 extend in the left-right direction, all of the upper guide rods 93 and all of the lower guide rods 94 are connected to the frame 1 so as to be slidable relative to the left-right direction, all of the upper guide rods 93 are fixedly connected to the upper protective baffle, all of the lower guide rods 94 are fixedly connected to the lower protective top plate, the upper protective baffle is arranged above the lower protective baffle, so that a gap is formed between the upper protective baffle and the lower protective baffle, the shift rod 10 passes through the gap, and the upper protective baffle and the lower protective baffle are arranged between the workpiece and the first conveying chain assembly.

[0080] The upper guide rod 93 and the lower guide rod 94 both extend in the left-right direction and are connected to the frame 1 so as to be relatively slidable left-right. This design allows the guide rods to be adjusted or adaptively moved according to the conveying requirements to adjust the positions of the upper guard plate 91 and the lower guard plate 92, ensuring that the workpiece can move stably along the predetermined path during the conveying process.

[0081] The upper and lower protective baffles are respectively arranged on the upper and lower sides of the workpiece, and a stable protective layer is formed by fixedly connecting with the upper guide rod 93 and the lower guide rod 94. The gap between the two baffles is designed just right, which allows the transmission parts such as the lever 10 to pass through, and can effectively block the workpiece, preventing the workpiece from touching the conveyor chain in the conveyor chain assembly during the conveying process, and preventing the lubricating oil on the conveyor chain from getting on the workpiece.

[0082] Optionally, a plurality of air holes are provided on the workbench 13, and the air holes are used to output gas so as to reduce the friction between the workpiece and the workbench 13 and facilitate transportation.

[0083] The present invention further provides a packaging machine, which includes the conveying structure in any of the above embodiments. Since the above content has described the conveying structure in detail, those skilled in the art should be able to understand it in conjunction with the drawings in the specification, so the conveying structure will not be described in detail here.

[0084] The design of the conveying structure takes into account workpieces of different specifications and types, so the packaging machine can handle multiple types of workpieces, improving the flexibility of the equipment. This helps companies respond to diverse market demands and expand their business scope. Because the conveying structure has efficient and stable workpiece conveying capabilities, the packaging machine can handle more workpieces faster, thereby improving overall packaging efficiency. This helps companies increase production capacity and meet market demand.

[0085] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A conveying structure, comprising a frame (1) and a workbench (13) arranged on the frame (1), wherein the workbench (13) is used to support a workpiece upward, and is characterized in that: The conveying structure also includes: Front and rear cylinders, the fixing parts of the front and rear cylinders being arranged on the frame (1); Front and rear slide rails (3), the front and rear slide rails (3) extending in a front-to-rear direction, the front and rear slide rails (3) being arranged on the frame (1); A material pushing device (4), the material pushing device (4) being arranged on the front and rear slide rails (3), the material pushing device (4) and the front and rear slide rails (3) being relatively slidably matched and connected, and the material pushing device (4) being used to push the workpiece; A flexible connection component (5), one end of the flexible connection component (5) is fixed to the material pushing device (4), and the other end of the flexible connection component (5) is fixed to the frame (1); and a pulley assembly (6), wherein the pulley assembly (6) is arranged on the movable parts of the front and rear cylinders, and the pulley assembly (6) is used to pull the flexible connection assembly (5) to drive the pushing device (4) to reciprocate in the front and rear directions; The pushing device (4) comprises front and rear sliders (41), a pushing frame (42), an up-and-down movement mechanism (43) and a pushing mechanism (44); the front and rear sliders (41) are arranged on the front and rear slide rails (3); the front and rear sliders (41) and the front and rear slide rails (3) are relatively slidably connected; one end of the flexible connection component (5) is fixedly connected to the front and rear sliders (41); the up-and-down movement mechanism (43) is arranged on the front and rear sliders (41); the pushing frame (42) is arranged on the up-and-down movement mechanism (43); the up-and-down movement mechanism (43) drives the pushing frame (42) to move. ) reciprocates in the up-and-down direction, the pushing mechanism (44) is fixed on the pushing frame (42), and the pushing mechanism (44) is used to push the workpiece; the up-and-down movement mechanism (43) comprises an up-and-down cylinder (431), an up-and-down slider (432), and an up-and-down slide rail (433), the up-and-down slide rail (433) is fixed on the pushing frame (42), the up-and-down slider (432) is arranged on the up-and-down slide rail (433), the up-and-down slider (432) and the up-and-down slide rail (433) can slide up-and-down relative to each other, the up-and-down cylinder (431) is fixed on the front and rear sliders (41), the up-and-down slider (432) is arranged on the up-and-down slide rail (433), the up-and-down slider (432) and the up-and-down slide rail (433) can slide up-and-down relative to each other, The slider (432) is fixedly connected to the front and rear sliders (41); the movable parts of the upper and lower cylinders (431) are fixedly connected to the push rack (42) to drive the push rack (42) to move up and down; the push mechanism (44) includes a push plate (441), a push cylinder (442), a downward pressure cylinder (443) and a pressure block (444); the push plate (441) is fixedly connected to the push rack (42); the fixed part of the push cylinder (442) is fixed on the push rack (42) or the push plate (441); the push plate (441) is used to push the workpiece; the push plate (441) is provided with a push rod (443) and a push rod (444). An avoidance hole is provided which runs through the thickness of the push plate (441); the movable part of the push cylinder (442) passes through the avoidance hole to push the workpiece so that the workpiece is separated from the push plate (441); the pressure block (444) is hinged to the push plate (441); one end of the downward pressure cylinder (443) is hinged to the pressure block (444); the other end of the downward pressure cylinder (443) is hinged to the push plate (441); the downward pressure cylinder (443) drives the pressure block (444) to swing up and down around the hinge between the push plate (441) and the pressure block (444), so that the pressure block (444) can clamp the workpiece downward.

2. The conveying structure according to claim 1, characterized in that: The frame (1) comprises a bottom frame (12) and a top frame (11) fixed to the bottom frame (12); the workbench (13) is arranged on the bottom frame (12); and the front and rear cylinders, the front and rear slide rails (3), the flexible connection assembly (5) and the pulley assembly (6) are respectively arranged on the top frame (11).

3. The conveying structure according to claim 1, characterized in that: The front and rear cylinders comprise a front and rear cylinder body (21), a sliding frame (22) and a roller (23); the sliding frame (22) is fixed to a movable portion of the front and rear cylinders; a fixed portion of the front and rear cylinder body (21) is fixed to the frame (1); the roller (23) is arranged on the sliding frame (22); the roller (23) presses downward against the frame (1) to support the sliding frame (22); and the pulley assembly (6) is arranged on the sliding frame (22).

4. The conveying structure according to claim 1, characterized in that: The pulley assembly (6) comprises a first sprocket (61), the first sprocket (61) being arranged on the movable parts of the front and rear cylinders, the first sprocket (61) and the movable parts of the front and rear cylinders being rotatable relative to each other, the flexible connection assembly (5) comprising a chain (52), one end of the chain (52) being connected to the pushing device (4), the other end of the chain (52) being connected to the frame (1), the chain (52) passing around the front side of the first sprocket (61), and the first sprocket (61) and the chain (52) being meshed with each other.

5. The conveying structure according to claim 4, characterized in that: The pulley assembly (6) further comprises a first fixed pulley (62), a second fixed pulley (63) and a first movable pulley (64); the flexible connection assembly (5) comprises a connecting rope (51); the first movable pulley (64) is arranged on the movable part of the front and rear cylinders; the first fixed pulley (62) and the second fixed pulley (63) are respectively arranged on the frame (1); the first fixed pulley (62) is arranged in front of the second fixed pulley (63); the front end of the connecting rope (51) is fixedly connected to the frame (1); the rear end of the connecting rope (51) is sequentially wound around the rear side of the first movable pulley (64), the front side of the first fixed pulley (62) and the rear side of the second fixed pulley (63); the rear end of the connecting rope (51) is fixedly connected to the pushing device (4); the fixing point of the connecting rope (51) and the pushing device (4) is called a connecting portion; the connecting portion is located between the first fixed pulley (62) and the second fixed pulley (63).

6. The conveying structure according to claim 1, characterized in that: The conveying structure further comprises a pressing cylinder (71), a connecting rod (72) and a lower pressing plate (73); the fixing portion of the pressing cylinder (71) is fixed on the frame (1); a slide groove extending in an up-down direction is provided on the frame (1); the connecting rod (72) is inserted into the slide groove; the connecting rod (72) and the slide groove can slide relative to each other; the pressing cylinder (71) drives the connecting rod (72) to move up and down; the lower pressing plate (73) is fixedly connected to the connecting rod (72); the lower pressing plate (73) is arranged at the conveying downstream of the pushing device (4); and the lower pressing plate (73) is used to press down the workpiece.

7. A packaging machine, characterized in that: Comprising the conveying structure according to any one of claims 1-6.

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