A machine core for box sealing

Abstract

The application discloses a carton sealing machine core and relates to the technical field of packaging equipment. The carton sealing machine core comprises a core side plate, a front pressing wheel assembly, a rear pressing wheel assembly, a second reset member and a transmission mechanism. The second reset member is arranged to drive the rear pressing wheel assembly to rotate forward. The transmission mechanism comprises a lever assembly, a first connecting member and a second connecting member. The lever assembly comprises at least one transmission lever. The transmission lever is rotationally connected to the core side plate. The front pressing wheel assembly is in transmission connection with the first input / output end of the lever assembly through the first connecting member. The rear pressing wheel assembly is in transmission connection with the second input / output end of the lever assembly through the second connecting member. The lever assembly is arranged in such a way that, at the same time, the equivalent force arm length of the first connecting member to the lever assembly is greater than the force arm length of the second connecting member to the lever assembly. The above scheme can avoid the carton from being stuck or deformed due to excessive resistance during the running process, and improves the sealing smoothness and structural reliability.

Description

Technical Field

[0001] This application relates to the field of packaging equipment technology, and in particular to a carton sealing machine mechanism. Background Technology

[0002] A carton sealing machine is an automated device widely used for sealing packaging boxes. It can operate as a standalone unit or be integrated into a production line. Its core component is the machine mechanism, which is responsible for applying and cutting the adhesive tape to the box. Traditional carton sealing machines require a high pressure setting on the pressure roller assembly to ensure the tape adheres firmly. However, this high pressure can create excessive resistance when lifting the box, hindering its movement and causing jamming or deformation.

[0003] Patent CN208947735U discloses a carton sealing machine mechanism, including a clamping plate, a tape reel, guide rollers, a blade holder, blades, a front support, a rear support, a front pressure roller, a rear pressure roller, a linkage rod, a first spring, and a second spring. The front and rear pressure rollers are directly connected via the linkage rod, allowing them to rise and fall synchronously. During the sealing operation, the linkage rod, under the action of the springs, drives the front and rear supports to rotate around a pivot, causing the front and rear pressure rollers to press the tape together, completing the sealing action. However, the technical solution in this patent still suffers from the aforementioned problem of the packaging box being obstructed due to high pressure. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this application provides a carton sealing machine core that can prevent the packaging box from jamming or deforming due to excessive resistance during the process, thereby improving the sealing smoothness and structural reliability.

[0005] To achieve the above objectives, this application adopts the following technical solution: A carton sealing machine mechanism includes a mechanism side plate, a front pressure roller assembly, a rear pressure roller assembly, a second reset member, and a transmission mechanism. Both the front and rear pressure roller assemblies are rotatably mounted on the mechanism side plate. The second reset member is configured to drive the rear pressure roller assembly to rotate forward. The transmission mechanism includes a lever assembly, a first connecting member, and a second connecting member. The lever assembly includes at least one transmission lever, which is rotatably connected to the mechanism side plate. The front pressure roller assembly is driven by the first connecting member to the first input / output end of the lever assembly, and the rear pressure roller assembly is driven by the second connecting member to the second input / output end of the lever assembly. The lever assembly is configured such that, at any given time, the equivalent force arm length of the first connecting member relative to the lever assembly is greater than the lever arm length of the second connecting member relative to the lever assembly.

[0006] In the above technical solution, the rotation direction of the front pressure roller assembly when it is lifted is opposite to that of the rear pressure roller assembly when it is lifted. When sealing the box, the box enters from the side of the front pressure roller assembly through the conveying mechanism. The front pressure roller assembly can rotate forward and lift around the side plate of the mechanism under the pressure of the front side wall of the box. During the process of being lifted by the box, the front pressure roller assembly can press the front side of the box with glue. At the same time, through the linkage of the lever assembly, the rear pressure roller assembly rotates in the opposite direction and is lifted. As the box continues to move forward, the front pressure roller assembly presses against the top of the box to complete the top surface glue pressing. When the box continues to move forward and disengages from the front pressure roller assembly, and the box enters the corresponding position of the rear pressure roller assembly, the rear pressure roller assembly rotates forward and presses down under the action of the second reset component to press the rear side of the box with glue, thereby realizing the glue pressing and sealing of the front, rear and top surfaces. This application achieves efficient force transmission and directional conversion between the front and rear pressure roller assemblies by setting a lever assembly between the front and rear pressure roller assemblies. At the same time, it utilizes the difference in lever arms to realize the labor-saving design of the front pressure roller assembly, avoiding the packaging box from jamming or deforming due to excessive resistance during the movement of the box, thus improving the sealing smoothness and structural reliability. It is especially suitable for the adaptive pressing needs of packaging boxes of different heights in high-speed automated packaging production lines.

[0007] Preferably, the first connector is a first link, and the two ends of the first link are respectively hinged to the first connector and the first input / output end; Alternatively, the first connecting member includes a first sliding member and a first rotating member. The first sliding member is slidably connected to the first input / output terminal, one end of the first rotating member is rotatably connected to the first sliding member, and the other end of the first rotating member is fixed to the front pressure roller assembly. Alternatively, the first connecting member includes a first sliding member and a first rotating member. The first sliding member is slidably connected to the front pressure roller assembly, one end of the first rotating member is rotatably connected to the first sliding member, and the other end of the first rotating member is fixed to the first input / output terminal. Alternatively, the first connector includes a first abutment, which is connected to the front pressure roller assembly. The first abutment abuts against the first input / output end so that the first abutment can slide and rotate relative to the first input / output end. The abutting connection of the first abutment is configured such that when the current pressure roller assembly rotates in the forward direction, the first abutment abuts against the first input / output end and drives the first input / output end to rotate; when the current pressure roller assembly rotates in the reverse direction, the first abutment disengages from the first input / output end. Alternatively, the first connector includes a first abutment, which is connected to the first input / output terminal. The first abutment abuts against the front pressure roller assembly so that the first abutment can slide and rotate relative to the front pressure roller assembly. The abutting connection of the first abutment is configured such that when the front pressure roller assembly rotates in the forward direction, the front pressure roller assembly abuts against the first abutment and drives the first input / output terminal to rotate; when the front pressure roller assembly rotates in the reverse direction, the front pressure roller assembly disengages from the first abutment.

[0008] In the first technical solution described above, a bidirectional transmission connection between the first connecting member and the first input / output terminal is achieved through the first connecting rod. In the second and third technical solutions described above, a combination of the first sliding member and the first rotating member is used to achieve bidirectional transmission between the first connecting member and the first input / output terminal.

[0009] In the fourth and fifth technical solutions mentioned above, the first abutting member realizes the unidirectional transmission connection of the transmission mechanism, that is, it only transmits power when the front pressure roller assembly rotates in the forward direction, and disengages in the reverse direction. Thus, when the front pressure roller assembly leaves the packaging box, it rotates in the reverse direction and presses down to reset first, which can reset before the blade assembly. This increases the tape length between the front pressure roller assembly and the rear pressure roller assembly without changing the length of the mechanism, providing sufficient and stable tape allowance for the subsequent cutting action of the blade assembly. After the packaging box passes through the blade assembly, the blade assembly needs to press down a certain distance before it can contact and press the tape to complete the tape cutting action. At this time, the tape length left at the tail of the packaging box is increased, and the remaining tape can be stably pressed onto the surface of the box by the rear pressure roller assembly during the subsequent tape sealing process. Due to the increased tape allowance, the problem of poor sealing caused by the tape being too short is effectively avoided. Furthermore, because the front pressure roller assembly has already completed its reset before the blade assembly cuts, the tape remains taut during the front pressure roller assembly operation, making it less prone to slack or shifting. This ensures accurate and stable tape positioning. After the tape is cut, the front pressure roller assembly does not pull on the tape, further preventing positional shifts. This avoids the situation where the front pressure roller assembly resets after the blade assembly cuts the tape, which could lead to bending, wrinkling, or positional shifts in the tape after cutting, affecting the stability and quality of subsequent box sealing.

[0010] Preferably, the first abutting member is a roller, and the first abutting member is rotatably connected to the front pressure roller assembly or rotatably connected to the first input / output terminal.

[0011] In the above technical solution, the roller can rotate freely relative to the front pressure roller assembly or the first input / output end, effectively reducing frictional resistance during movement and improving transmission smoothness.

[0012] Preferably, the second connector is a second link, and the two ends of the second link are respectively hinged to the second connector and the second input / output end; Alternatively, the second connecting member includes a second sliding member and a second rotating member. The second sliding member is slidably connected to the second input / output terminal, one end of the second rotating member is rotatably connected to the second sliding member, and the other end of the second rotating member is fixed to the rear pressure roller assembly. Alternatively, the second connecting member includes a second sliding member and a second rotating member. The second sliding member is slidably connected to the rear pressure roller assembly, one end of the second rotating member is rotatably connected to the second sliding member, and the other end of the second rotating member is fixed to the second input / output terminal. Alternatively, the second connector includes a second abutment, which is connected to the rear pressure roller assembly. The second abutment abuts against the second input / output end so that the second abutment can slide and rotate relative to the second input / output end. The abutting connection of the second abutment is configured such that when the current pressure roller assembly rotates in the forward direction, the second input / output end abuts against the second abutment and drives the rear pressure roller assembly to rotate in the forward direction; when the current pressure roller assembly rotates in the reverse direction, the second abutment disengages from the second input / output end. Alternatively, the second connector includes a second abutment, which is connected to a second input / output terminal. The second abutment abuts against the front pressure roller assembly so that it can slide and rotate relative to the front pressure roller assembly. The abutting connection of the second abutment is configured such that when the front pressure roller assembly rotates in the forward direction, the second abutment abuts against the rear pressure roller assembly and drives the rear pressure roller assembly to rotate in the forward direction; when the front pressure roller assembly rotates in the reverse direction, the second abutment disengages from the rear pressure roller assembly.

[0013] In the first technical solution described above, a bidirectional transmission connection between the second connecting member and the second input / output terminal is achieved through the second connecting rod. In the second and third technical solutions described above, a combination of the second sliding member and the second rotating member is used to achieve bidirectional transmission between the second connecting member and the second input / output terminal.

[0014] In the fourth and fifth technical solutions mentioned above, the transmission mechanism achieves unidirectional transmission connection through the second abutment member. That is, it transmits power only when the front pressure roller assembly rotates in the forward direction and disengages in the reverse direction. This allows the front pressure roller assembly to rotate in the reverse direction and reset before the packaging box, thus resetting before the blade assembly. This increases the tape length between the front and rear pressure roller assemblies while keeping the core length unchanged, providing sufficient and stable tape allowance for the subsequent cutting action of the blade assembly. After the packaging box passes through the blade assembly, the blade assembly needs to press down a certain distance before contacting and pressing the tape to complete the tape cutting action. At this time, the tape length left at the tail of the packaging box is increased, allowing the pressure roller assembly to stably press the remaining tape onto the box surface after passing through during the subsequent tape sealing process. Due to the increased tape allowance, the problem of loose sealing caused by excessively short tape is effectively avoided. Furthermore, because the front pressure roller assembly has already completed its reset before the blade assembly cuts, the tape remains taut during the front pressure roller assembly operation, making it less prone to slack or shifting. This ensures accurate and stable tape positioning. After the tape is cut, the front pressure roller assembly does not pull on the tape, further preventing positional shifts. This avoids the situation where the front pressure roller assembly resets after the blade assembly cuts the tape, which could lead to bending, wrinkling, or positional shifts in the tape after cutting, affecting the stability and quality of subsequent box sealing.

[0015] Preferably, the second abutment is a roller, and the second abutment is rotatably connected to the rear pressure roller assembly or rotatably connected to the second input / output end.

[0016] In the above technical solution, the roller can rotate freely relative to the rear pressure roller assembly or the second input / output end, effectively reducing frictional resistance during movement and improving transmission smoothness.

[0017] Preferably, two adjacent transmission levers are connected by a third connecting member: The third connecting member is a third link, and the two ends of the third link are respectively hinged to two adjacent transmission levers; Alternatively, the third connecting member includes a third sliding member and a third rotating member. The third sliding member is slidably connected to the first of two adjacent transmission levers, one end of the third rotating member is rotatably connected to the third sliding member, and the other end of the third rotating member is fixed to the second of two adjacent transmission levers. Alternatively, the third connecting member includes a third abutment member, which is connected to the first of two adjacent transmission levers. The third abutment member abuts against the second of the two adjacent transmission levers, so that the third abutment member can slide and rotate relative to the second transmission lever. The abutting connection of the third abutment member is configured such that when the current pressure roller assembly rotates in the forward direction, the third abutment member abuts against and drives the second transmission lever to rotate; when the current pressure roller assembly rotates in the reverse direction, the third abutment member disengages from the second transmission lever.

[0018] In the first technical solution described above, a bidirectional transmission connection between the two transmission levers is achieved through a third connecting rod. In the second technical solution described above, a combination of a third sliding member and a third rotating member is used to achieve bidirectional transmission between the two transmission levers.

[0019] In the third technical solution mentioned above, the transmission mechanism achieves unidirectional transmission connection through the third abutment component. That is, it transmits power only when the front pressure roller assembly rotates in the forward direction and disengages in the reverse direction. This allows the front pressure roller assembly to rotate in the reverse direction and reset before the packaging box, thus resetting before the blade assembly. This increases the tape length between the front and rear pressure roller assemblies while keeping the core length unchanged, providing sufficient and stable tape allowance for the subsequent cutting action of the blade assembly. After the packaging box passes through the blade assembly, the blade assembly needs to press down a certain distance before contacting and pressing the tape, completing the tape cutting action. At this time, the tape length left at the tail of the packaging box is increased, and the remaining tape can be stably pressed onto the box surface by the rear pressure roller assembly during the subsequent tape sealing process. Due to the increased tape allowance, the problem of poor sealing caused by excessively short tape is effectively avoided. Furthermore, because the front pressure roller assembly has already completed its reset before the blade assembly cuts, the tape remains taut during the front pressure roller assembly operation, making it less prone to slack or shifting. This ensures accurate and stable tape positioning. After the tape is cut, the front pressure roller assembly does not pull on the tape, further preventing positional shifts. This avoids the situation where the front pressure roller assembly resets after the blade assembly cuts the tape, which could lead to bending, wrinkling, or positional shifts in the tape after cutting, affecting the stability and quality of subsequent box sealing.

[0020] Preferably, the third abutment is a roller, and the third abutment is rotatably connected to the second transmission lever.

[0021] In the above technical solution, the roller can rotate freely relative to the first transmission lever, effectively reducing frictional resistance during movement and improving transmission smoothness.

[0022] Preferably, the lever assembly includes a transmission lever, which includes a rotating part, a first connecting part, and a second connecting part. The rotating part is rotatably connected to the side plate of the movement via a rotating shaft. The first connecting member is pulsatorically connected to the first connecting part, and the second connecting member is pulsatorically connected to the second connecting part. The transmission lever is located between the first connecting member and the second connecting member, and the first connecting part and the second connecting part are located on the same side of the rotating part.

[0023] In the above technical solution, by placing the first connecting part and the second connecting part on the same side of the rotating part, the rotation direction switching of the front pressure roller assembly and the rear pressure roller assembly is realized. When the front end of the packaging box contacts the front pressure roller assembly and lifts it forward, the first connecting part drives the transmission lever to rotate around the rotating shaft. Since the first connecting part and the second connecting part are located on the same side of the rotating part, and the stress arm of the first connecting part is greater than that of the second connecting part, the transmission lever drives the rear pressure roller assembly to lift in the opposite direction with a smaller torque, realizing the coordinated control of front pressure saving and rear pressure linkage.

[0024] Preferably, the lever assembly includes multiple transmission levers, with adjacent transmission levers being connected by transmission. The first input / output end is located near the first transmission lever of the front pressure wheel assembly, and the second input / output end is located near the second transmission lever of the rear pressure wheel assembly.

[0025] In the above technical solution, by setting multiple transmission levers and connecting them sequentially, a greater lever arm gain and motion stroke amplification can be achieved with a relatively small height.

[0026] Preferably, it also includes a first reset member, which is configured to drive the current pressure roller assembly to rotate in the opposite direction; or, the front pressure roller assembly has a raised state and a pressed state, and the center of gravity height of the front pressure roller assembly decreases from the raised state to the pressed state.

[0027] In the above technical solution, after the front pressure roller assembly completes the tape bonding, it can be pressed down and reset under the first reset member or gravity.

[0028] Preferably, the movement side plate is provided with a stop bar, and the front pressure roller assembly is provided with a limiting piece, so that when the front pressure roller assembly is reset by the first reset member, the limiting piece abuts against the stop bar.

[0029] In the above technical solution, the stop bar and the limiting piece abut against each other to limit the reset position of the front pressure roller assembly, prevent it from rotating excessively, and ensure that the front pressure roller assembly is stably stopped at the preset pressing position during the reset process, thereby ensuring the repeatability accuracy of each tape bonding action and the consistency of the sealing quality.

[0030] Preferably, the rear pressure roller assembly is rotatably mounted on the side plate of the movement via a first rotating shaft. The rear pressure roller assembly is provided with an adjustment component, and the second reset component is a torsion spring. The adjustment component is provided with several positions. The second reset component is sleeved on the first rotating shaft, and one end of the second reset component is connected to the first rotating shaft, while the other end is connected to any one of the positions.

[0031] In the above technical solution, by adjusting the torsion spring and different gear positions, the reset torque of the rear pressure roller assembly can be flexibly adjusted to adapt to the sealing requirements of packaging boxes of different thicknesses or materials. This ensures that the rear pressure roller stably adheres to the tape while avoiding excessive pressure that could cause the tape to break or the box to deform, thus improving the applicability of the equipment and the reliability of the sealing. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of this application. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this application. Figure 2 ; Figure 3 This is a schematic diagram of the structure of this application. Figure 3 ; Figure 4 This is a schematic diagram of the structure of this application. Figure 4 ; Figure 5 This is a schematic diagram of the front pressure roller assembly, rear pressure roller assembly, and blade assembly in this application when they are raised; Figure 6 This is a schematic diagram of the structure in Example 2. Figure 6 ; Figure 7 This is a schematic diagram of the structure in Example 2. Figure 7 ; Figure 8 This is a schematic diagram of the structure in Example 4. Figure 8 ; Figure 9 This is a schematic diagram of the structure in Example 7. Figure 9 ; Figure 10 This application presents a schematic diagram of the structure when the front pressure roller assembly is pressed down and the rear pressure roller assembly and blade assembly are raised.

[0033] In the diagram: 1. Movement side plate; 2. Front pressure roller assembly; 2.1. Limiting plate; 3. Rear pressure roller assembly; 3.1. Adjusting component; 3.2. Gear position; 3.3. First rotating shaft; 4. First reset component; 5. Second reset component; 6. Transmission mechanism; 6.1. Lever assembly; 6.1.1. Transmission lever; 6.1.1. Rotating part; 6.1.11. First connecting part; 6.1.12. Second connecting part; 6.1.13. Third connecting part; 6.1.2. Third connecting rod; 6.1.21. Third sliding part; 6.1.22. Third rotating part; 6.1.23. Third abutting part; 6.1.24. First connecting part; 6.2. First connecting rod; 6.2.1. First abutting part; 6.2.4. Second connecting part; 6.3. Second connecting rod; 6.3.1. Blade assembly; 7. Toothed blade; 7.1. First lifting component; 7.2. Third reset component; 8. Gear lever; 9. Adhesive tape; 10. Detailed Implementation

[0034] The present application will now be further described with reference to the accompanying drawings and specific embodiments.

[0035] Example 1: like Figures 1 to 5 As shown, a carton sealing machine mechanism includes a mechanism side plate 1, a front pressure roller assembly 2, a rear pressure roller assembly 3, a second reset member 5, and a transmission mechanism 6. The front pressure roller assembly 2 and the rear pressure roller assembly 3 are both rotatably mounted on the mechanism side plate 1. The second reset member 5 is configured to drive the rear pressure roller assembly 3 to rotate forward and press down. The transmission mechanism 6 includes a lever assembly 6.1, a first connecting member 6.2, and a second connecting member 6.3. The lever assembly 6.1 includes at least one transmission lever 6.1.1, which is rotatably connected to the mechanism side plate 1. The front pressure roller assembly 2... The first input / output end of the lever assembly 6.1 is connected to the first input / output end of the first connector 6.2, and the rear pressure roller assembly 3 is connected to the second input / output end of the lever assembly 6.1 via the second connector 6.3. The lever assembly 6.1 is configured such that at any given time, the equivalent force arm length of the first connector 6.2 on the lever assembly 6.1 is greater than the lever arm length of the second connector 6.3 on the lever assembly 6.1, that is, the reaction force of the lever assembly 6.1 on the front pressure roller assembly 2 can be less than the reaction force of the lever assembly 6.1 on the rear pressure roller assembly 3.

[0036] In this application, "forward" refers to... Figure 2 , Figure 3 The clockwise direction - S direction, and the reverse direction refers to Figure 2 , Figure 3The counterclockwise direction -N direction in the middle, the rotation direction of the front pressure roller assembly 2 when it is lifted is opposite to the rotation direction of the rear pressure roller assembly 3 when it is lifted, and both are clockwise. In the above technical solution, the rotation direction of the front pressure roller assembly 2 when it is lifted is opposite to that of the rear pressure roller assembly 3 when it is lifted. When sealing the box, the box enters from the front pressure roller assembly 2 via the conveying mechanism. The front pressure roller assembly 2 can rotate and lift around the side plate 1 of the mechanism under the pressure of the front side wall of the box. During the process of being lifted by the box, the front pressure roller assembly 2 can press the front side of the box with glue. At the same time, through the linkage of the lever assembly 6.1, the rear pressure roller assembly 3 rotates and lifts in the opposite direction. As the box continues to move forward, the front pressure roller assembly 2 presses against the top of the box to complete the top surface glue pressing. When the box continues to move forward and disengages from the front pressure roller assembly 2, and the box enters the corresponding position of the rear pressure roller assembly 3, the rear pressure roller assembly 3 rotates and presses down a small distance under the action of the second reset member 5 to press the rear side of the box with glue, thereby achieving the glue pressing and sealing of the front, rear and top sides. This application achieves efficient force transmission and directional switching between the front and rear pressure roller assemblies 2 and 3 by setting a lever assembly 6.1 between the front pressure roller assembly 2 and the rear pressure roller assembly 3. Simultaneously, it utilizes the difference in lever arms to achieve a labor-saving design for the front pressure roller assembly 2, preventing the packaging box from jamming or deforming due to excessive resistance during its movement. This improves the sealing smoothness and structural reliability, making it particularly suitable for the adaptive pressing requirements of packaging boxes of different heights in high-speed automated packaging production lines. In this application, the sealing machine mechanism can also be used inverted, i.e., the sealing machine mechanism is installed below the conveyor mechanism, allowing the packaging box to pass over the sealing machine mechanism.

[0037] Specifically, the front pressure roller assembly 2 includes a front rotating frame and a front pressure roller, the front rotating frame being rotatably connected to the machine core side plate 1 via a rotating shaft. The rear pressure roller assembly 3 includes a rear rotating frame and a rear pressure roller, the rear rotating frame being rotatably connected to the machine core side plate 1 via a first rotating shaft 3.3. The second reset member 5 can be a torsion spring or a telescopic spring. The sealing machine core also includes a blade assembly 7, which is rotatably or slidably connected to the machine core side plate 1 and has a downward cutting position and a raised clearance position. A third reset member 8 is connected between the machine core side plate 1 and the blade assembly 7, and the third reset member 8 is configured to drive the blade assembly 7 to remain in the cutting position. The blade assembly 7 is provided with a first lifting member 7.2 and a toothed blade 7.1 for cutting the tape. When the first lifting member 7.2 contacts the packaging box, the blade assembly 7 rotates and lifts against the elastic force of the third reset member 8, so that the blade avoids the top of the packaging box. After the packaging box passes, the first lifting member 7.2 is released as the end of the packaging box is detached. Under the action of the third reset member 8, the blade assembly 7 rotates in the opposite direction and presses down to the cutting position, and the toothed blade 7.1 accurately cuts the tape.

[0038] Preferably, the rear pressure roller assembly 3 is rotatably mounted on the side plate 1 of the mechanism via a first rotating shaft 3.3. The rear pressure roller assembly 3 is equipped with an adjusting component 3.1, and the second reset component 5 is a torsion spring. The adjusting component 3.1 has several positions 3.2. The second reset component 5 is sleeved on the first rotating shaft 3.3, with one end connected to the first rotating shaft 3.3 and the other end connected to any one of the positions 3.2. In the above technical solution, by adjusting the cooperation between the torsion spring and different positions 3.2, the reset torque of the rear pressure roller assembly 3 can be flexibly adjusted to adapt to the sealing requirements of packaging boxes of different thicknesses or materials. This ensures that the rear pressure roller stably adheres to the tape while avoiding excessive pressure that could cause tape breakage or box deformation, thus improving the applicability of the equipment and the reliability of the sealing process.

[0039] Preferably, in one embodiment, the sealing machine mechanism further includes a first reset member 4, which is configured to drive the current pressure roller assembly 2 to press down in the opposite direction. In the above technical solution, the first reset member 4 can quickly drive the front pressure roller assembly 2 to press down and reset after the tape is applied. The first reset member 4 can be a torsion spring or a telescopic spring.

[0040] Understandably, in another embodiment, the front pressure roller assembly 2 has a raised state and a pressed state, and the center of gravity height of the front pressure roller assembly 2 decreases from the raised state to the pressed state. The decrease in the center of gravity height of the front pressure roller assembly 2 from the raised state to the pressed state also allows it to naturally tend towards the pressed state when no external force is applied, and can quickly press down and reset by its own gravity after the front pressure roller assembly 2 completes the tape application.

[0041] Preferably, the side plate 1 of the mechanism is provided with a stop bar 9, and the front pressure roller assembly 2 is provided with a limiting piece 2.1. When the front pressure roller assembly 2 is reset by the first reset piece 4 or by gravity, the limiting piece 2.1 abuts against the stop bar 9. In the above technical solution, the stop bar 9 and the limiting piece 2.1 abut against each other to limit the reset position of the front pressure roller assembly 2, prevent it from rotating excessively, and ensure that the front pressure roller assembly 2 is stably stopped at the preset pressing position during the reset process, thereby ensuring the repeatability accuracy of each tape application action and the consistency of the sealing quality.

[0042] Example 2: Based on Example 1, such as Figure 3 and Figure 4 As shown, in this embodiment: the lever assembly 6.1 includes a plurality of transmission levers 6.1.1, and two adjacent transmission levers 6.1.1 are connected by a third connector 6.1.2. The transmission lever 6.1.1 includes a first transmission lever and a second transmission lever. The first input / output end is located near the first transmission lever 6.1.1 of the front pressure wheel assembly 2, and the second input / output end is located near the second transmission lever 6.1.1 of the rear pressure wheel assembly 3.

[0043] In the above technical solution, by setting multiple transmission levers 6.1.1 and connecting them sequentially, a greater lever arm gain and motion stroke amplification can be achieved with a relatively small height.

[0044] Preferably, the number of transmission levers 6.1.1 is two.

[0045] Understandably, in one embodiment, the third connecting member 6.1.2 includes a third abutting member 6.1.24, which is connected to the first transmission lever 6.1.1 of two adjacent transmission levers 6.1.1. The third abutting member 6.1.24 abuts against the second transmission lever 6.1.1 of the two adjacent transmission levers 6.1.1, so that the third abutting member 6.1.24 can slide and rotate relative to the second transmission lever 6.1.1. The abutting connection of the third abutting member 6.1.24 is configured such that when the current pressure roller assembly 2 rotates forward and lifts, the third abutting member 6.1.24 abuts against and drives the second transmission lever 6.1.1 to rotate; when the current pressure roller assembly 2 rotates in the reverse direction and presses down, the third abutting member 6.1.24 disengages from the second transmission lever 6.1.1. Preferably, the third abutting member 6.1.24 is a roller, and the third abutting member 6.1.24 is rotatably connected to the second transmission lever 6.1.1. The roller can rotate freely relative to the first transmission lever 6.1.1, effectively reducing frictional resistance during movement and improving transmission smoothness.

[0046] In the third technical solution mentioned above, the transmission mechanism 6 is connected in one direction only through the third abutment 6.1.24. That is, it transmits power only when the front pressure roller assembly 2 rotates in the forward direction and disengages in the reverse direction. This allows the front pressure roller assembly 2 to rotate in the reverse direction and reset before the packaging box, thus resetting before the blade assembly 7. This increases the length of the tape 10 between the front pressure roller assembly 2 and the rear pressure roller assembly 3 while keeping the length of the mechanism unchanged. This provides sufficient and stable tape allowance for the subsequent cutting action of the blade assembly 7. After the packaging box passes through the blade assembly 7, the blade assembly 7 needs to press down a certain distance before it can contact and press the tape, completing the tape cutting action. At this time, the length of the tape left at the tail of the packaging box is increased. In the subsequent tape sealing process, the rear pressure roller assembly 3 can stably press the remaining tape onto the surface of the box. Due to the increased tape allowance, the problem of poor sealing caused by the tape being too short is effectively avoided. Furthermore, since the front pressure roller assembly 2 has already completed its reset before the blade assembly 7 cuts, the tape is always taut during the front pressure roller assembly 2 process, making it less prone to slack or shifting. This ensures the tape is accurately positioned and does not shift. After the tape is cut, the front pressure roller assembly 2 will not pull on the tape, ensuring the cut tape is not easily shifted. Because the above setup does not require increasing the overall length of the sealing machine, the sealing machine can be adapted to smaller packaging boxes, reducing the space occupied by the equipment and improving the stability and adaptability of the sealing operation.

[0047] In existing technology, the front pressure roller assembly 2 and the rear pressure roller assembly 3 are generally bidirectionally connected. When the front pressure roller assembly 2 is raised, it can drive the rear pressure roller assembly 3 to rise synchronously. However, while the rear pressure roller assembly 3 remains raised, the front pressure roller assembly 2 cannot reset and press down. This means the front pressure roller assembly 2 must wait for the rear pressure roller assembly 3 to reset before it can operate. The cutting action of the blade assembly 7 is completed before the rear pressure roller assembly 3 needs to reset. After the blade assembly 7 cuts, because the rear pressure roller assembly 3 is still raised, the front pressure roller assembly 2 cannot reset in time. This results in the tape lacking tension at the front end after cutting, causing it to fall freely downwards. This can easily lead to bending, wrinkling, or misalignment of the tape end, affecting the accurate application of the tape during subsequent sealing. Furthermore, the disturbance generated by the front pressure roller assembly 2 during its subsequent reset process further increases the risk of bending, wrinkling, or misalignment, thus affecting the stability and quality of subsequent sealing. In this application, after adopting a one-way transmission connection, the front pressure roller assembly 2 can be reset independently of the rear pressure roller assembly 3. The reset action can be completed before the blade assembly 7 cuts the tape 10. When the blade assembly 7 cuts the tape 10, the front pressure roller assembly 2 is already in the downward pressure state and does not need to perform a reset action. It will not generate additional downward pressure and disturbance on the tape 10, thereby effectively reducing the possible risk of the tape 10 bending, wrinkling or positional displacement, ensuring that the cut of the tape 10 stays stably in the predetermined position, and improving the tape position accuracy.

[0048] Understandably, in another embodiment, such as Figure 6 As shown, the third connecting member 6.1.2 is a third link 6.1.21, and both ends of the third link 6.1.21 are hinged to two adjacent transmission levers 6.1.1 respectively. In the above technical solution, the bidirectional transmission connection between the two transmission levers 6.1.1 is realized through the third link 6.1.21.

[0049] Understandably, in another embodiment, such as Figure 7 As shown, the third connecting member 6.1.2 includes a third sliding member 6.1.22 and a third rotating member 6.1.23. The third sliding member 6.1.22 is slidably connected to the first transmission lever 6.1.1 of the two adjacent transmission levers 6.1.1. One end of the third rotating member 6.1.23 is rotatably connected to the third sliding member 6.1.22, and the other end of the third rotating member 6.1.23 is fixed to the second transmission lever 6.1.1 of the two adjacent transmission levers 6.1.1. In the above technical solution, the combination of the third sliding member 6.1.22 and the third rotating member 6.1.23 realizes bidirectional transmission between the two transmission levers 6.1.1.

[0050] Example 3: Based on Example 1, such as Figure 2 , Figure 3 , Figure 4 and Figure 10 As shown, in this embodiment: the first connecting member 6.2 includes a first abutting member 6.2.4, which is connected to the front pressure roller assembly 2. The first abutting member 6.2.4 abuts against the first input / output end, allowing it to slide and rotate relative to the first input / output end. The abutting connection of the first abutting member 6.2.4 is configured such that when the front pressure roller assembly 2 rotates forward and lifts, the first abutting member 6.2.4 abuts against the first input / output end and drives it to rotate; when the front pressure roller assembly 2 rotates backward and presses down, the first abutting member 6.2.4 disengages from the first input / output end. Preferably, the first abutting member 6.2.4 is a roller, rotatably connected to the front pressure roller assembly 2. The roller can rotate freely relative to the front pressure roller assembly 2, effectively reducing frictional resistance during movement and improving transmission smoothness.

[0051] In the above technical solution, the first abutting member 6.2.4 realizes the one-way transmission connection of the transmission mechanism 6, that is, it only transmits power when the front pressure roller assembly 2 rotates in the forward direction, and disengages in the reverse direction. Thus, when the front pressure roller assembly 2 leaves the packaging box, it rotates in the reverse direction to reset first, and can reset before the blade assembly 7. Thus, while keeping the length of the mechanism unchanged, the length of the tape 10 between the front pressure roller assembly 2 and the rear pressure roller assembly 3 is increased, providing sufficient and stable tape allowance for the subsequent cutting action of the blade assembly 7. When the packaging box passes through the blade assembly 7, the blade assembly 7 needs to press down a certain distance before it can contact and press against the tape to complete the tape cutting action. At this time, the length of the tape left at the tail of the packaging box is increased, and the remaining part of the tape can be stably pressed against the surface of the box by the rear pressure roller assembly 3 during the subsequent tape sealing process. Due to the increased tape allowance, the problem of poor sealing caused by the tape being too short is effectively avoided. Furthermore, since the front pressure roller assembly 2 has already completed its reset action before the blade assembly 7 cuts, the tape is always in a taut state during the front pressure roller assembly 2, and it is not easy for it to loosen or shift, which can ensure that the tape position is accurate and does not shift. After the tape is cut, the front pressure roller assembly 2 will not pull on the tape, ensuring that the position of the cut tape is not easily shifted.

[0052] In existing technology, the front pressure roller assembly 2 and the rear pressure roller assembly 3 are generally bidirectionally connected. When the front pressure roller assembly 2 is raised, it can drive the rear pressure roller assembly 3 to rise synchronously. However, while the rear pressure roller assembly 3 remains raised, the front pressure roller assembly 2 cannot reset and press down. This means the front pressure roller assembly 2 must wait for the rear pressure roller assembly 3 to reset before it can operate. The cutting action of the blade assembly 7 is completed before the rear pressure roller assembly 3 needs to reset. After the blade assembly 7 cuts, because the rear pressure roller assembly 3 is still raised, the front pressure roller assembly 2 cannot reset in time. This results in the tape lacking tension at the front end after cutting, causing it to fall freely downwards. This can easily lead to bending, wrinkling, or misalignment of the tape end, affecting the accurate application of the tape during subsequent sealing. Furthermore, the disturbance generated by the front pressure roller assembly 2 during its subsequent reset process further increases the risk of bending, wrinkling, or misalignment, thus affecting the stability and quality of subsequent sealing. In this application, after adopting a one-way transmission connection, the front pressure roller assembly 2 can be reset independently of the rear pressure roller assembly 3. The reset action can be completed before the blade assembly 7 cuts the tape 10. When the blade assembly 7 cuts the tape 10, the front pressure roller assembly 2 is already in the downward pressure state and does not need to perform a reset action. It will not generate additional downward pressure and disturbance on the tape 10, thereby effectively reducing the possible risk of the tape 10 bending, wrinkling or positional displacement, ensuring that the cut of the tape 10 stays stably in the predetermined position, and improving the tape position accuracy.

[0053] Understandably, in another embodiment, the first connecting member includes a first abutment member connected to the first input / output terminal. The first abutment member abuts against the front pressure roller assembly, allowing it to slide and rotate relative to the front pressure roller assembly. The abutting connection of the first abutment member is configured such that when the front pressure roller assembly rotates and lifts forward, the front pressure roller assembly abuts against the first abutment member and drives the first input / output terminal to rotate; when the front pressure roller assembly rotates downward in the opposite direction, the front pressure roller assembly disengages from the first abutment member. Preferably, the first abutment member is a roller, rotatably connected to the front pressure roller assembly or rotatably connected to the first input / output terminal. Preferably, the first abutment member is a roller, rotatably connected to the first input / output terminal. The roller can rotate freely relative to the first input / output terminal, effectively reducing frictional resistance during movement and improving transmission smoothness.

[0054] In the above technical solution, the first abutting member realizes the unidirectional transmission connection of the transmission mechanism, that is, it only transmits power when the front pressure roller assembly rotates in the forward direction, and disengages in the reverse direction. Thus, when the front pressure roller assembly leaves the packaging box, it rotates in the reverse direction to reset first, which can reset before the blade assembly. This increases the tape length between the front pressure roller assembly and the rear pressure roller assembly while keeping the core length unchanged, providing sufficient and stable tape allowance for the subsequent cutting action of the blade assembly. After the packaging box passes the blade assembly, the blade assembly needs to press down a certain distance before it can contact and press the tape to complete the tape cutting action. At this time, the tape length left at the tail of the packaging box is increased, and the remaining tape can be stably pressed onto the surface of the box by the rear pressure roller assembly during the subsequent tape sealing process. Due to the increased tape allowance, the problem of poor sealing caused by the tape being too short is effectively avoided. Furthermore, since the front pressure roller assembly has already completed its reset action before the blade assembly cuts, the tape is always in a taut state during the front pressure roller assembly, making it less prone to slack or displacement. This ensures that the tape is accurately positioned and does not shift. After the tape is cut, the front pressure roller assembly will not pull on the tape, ensuring that the position of the cut tape is not easily shifted.

[0055] Example 4: Based on Example 1, such as Figure 8 As shown, in this embodiment: the first connecting member 6.2 is a first connecting rod 6.2.1, and the two ends of the first connecting rod 6.2.1 are respectively hinged to the first connecting member 6.2 and the first input / output terminal. In the above technical solution, the bidirectional transmission connection between the first connecting member 6.2 and the first input / output terminal is realized through the first connecting rod 6.2.1.

[0056] Understandably, in another embodiment, the first connecting member 6.2 includes a first sliding member and a first rotating member. The first sliding member is slidably connected to the first input / output terminal, one end of the first rotating member is rotatably connected to the first sliding member, and the other end of the first rotating member is fixed to the front pressure roller assembly 2. In the above technical solution, the combination of the first sliding member and the first rotating member realizes bidirectional transmission between the first connecting member 6.2 and the first input / output terminal.

[0057] Understandably, in another embodiment, the first connecting member 6.2 includes a first sliding member and a first rotating member. The first sliding member is slidably connected to the front pressure roller assembly 2, one end of the first rotating member is rotatably connected to the first sliding member, and the other end of the first rotating member is fixed to the first input / output terminal. In the above technical solution, the combination of the first sliding member and the first rotating member realizes bidirectional transmission between the first connecting member 6.2 and the first input / output terminal.

[0058] Example 5: Based on Example 1, such as Figures 1 to 5 As shown, in this embodiment: the second connecting member 6.3 is the second connecting rod 6.3.1, and the two ends of the second connecting rod 6.3.1 are respectively hinged to the second connecting member 6.3 and the second input / output terminal. In the above technical solution, the bidirectional transmission connection between the second connecting member 6.3 and the second input / output terminal is realized through the second connecting rod 6.3.1.

[0059] Understandably, in another embodiment, the second connecting member 6.3 includes a second sliding member and a second rotating member. The second sliding member is slidably connected to the second input / output terminal, one end of the second rotating member is rotatably connected to the second sliding member, and the other end of the second rotating member is fixed to the rear pressure roller assembly 3. In the above technical solution, the combination of the second sliding member and the second rotating member realizes bidirectional transmission between the second connecting member 6.3 and the second input / output terminal.

[0060] Understandably, in another embodiment, the second connecting member 6.3 includes a second sliding member and a second rotating member. The second sliding member is slidably connected to the rear pressure roller assembly 3, one end of the second rotating member is rotatably connected to the second sliding member, and the other end of the second rotating member is fixed to the second input / output terminal. In the above technical solution, the combination of the second sliding member and the second rotating member realizes bidirectional transmission between the second connecting member 6.3 and the second input / output terminal.

[0061] Example 6: Based on Embodiment 1, in this embodiment: the second connecting member 6.3 includes a second abutting member, which is connected to the rear pressure roller assembly 3. The second abutting member abuts against the second input / output end, allowing it to slide and rotate relative to the second input / output end. The abutting connection of the second abutting member is configured such that when the current pressure roller assembly 2 rotates and lifts in the forward direction, the second input / output end abuts against the second abutting member and drives the rear pressure roller assembly 3 to rotate and lift in the forward direction; when the current pressure roller assembly 2 rotates and presses down in the reverse direction, the second abutting member disengages from the second input / output end. Preferably, the second abutting member is a roller, which is rotatably connected to the rear pressure roller assembly 3. The roller can rotate freely relative to the rear pressure roller assembly 3, effectively reducing frictional resistance during movement and improving transmission smoothness.

[0062] In the above technical solution, the transmission mechanism 6 is connected in one direction only through the second abutting member. Power is transmitted only when the front pressure roller assembly 2 rotates in the forward direction and disengages in the reverse direction. This allows the front pressure roller assembly 2 to rotate in the reverse direction and reset before the packaging box, thus resetting before the blade assembly 7. This increases the length of the tape 10 between the front pressure roller assembly 2 and the rear pressure roller assembly 3 while keeping the core length unchanged. This provides sufficient and stable tape allowance for the subsequent cutting action of the blade assembly 7. After the packaging box passes through the blade assembly 7, the blade assembly 7 needs to press down a certain distance before it can contact and press against the tape to complete the tape cutting action. At this time, the length of the tape left at the tail of the packaging box is increased. During the subsequent tape sealing process, the rear pressure roller assembly 3 can stably press the remaining tape onto the surface of the box. Due to the increased tape allowance, the problem of loose sealing caused by the tape being too short is effectively avoided. Furthermore, since the front pressure roller assembly 2 has already completed its reset action before the blade assembly 7 cuts, the tape is always in a taut state during the front pressure roller assembly 2, and it is not easy for it to loosen or shift, which can ensure that the tape position is accurate and does not shift. After the tape is cut, the front pressure roller assembly 2 will not pull on the tape, ensuring that the position of the cut tape is not easily shifted.

[0063] In existing technology, the front pressure roller assembly 2 and the rear pressure roller assembly 3 are generally bidirectionally connected. When the front pressure roller assembly 2 is raised, it can drive the rear pressure roller assembly 3 to rise synchronously. However, while the rear pressure roller assembly 3 remains raised, the front pressure roller assembly 2 cannot reset and press down. This means the front pressure roller assembly 2 must wait for the rear pressure roller assembly 3 to reset before it can operate. The cutting action of the blade assembly 7 is completed before the rear pressure roller assembly 3 needs to reset. After the blade assembly 7 cuts, because the rear pressure roller assembly 3 is still raised, the front pressure roller assembly 2 cannot reset in time. This results in the tape lacking tension at the front end after cutting, causing it to fall freely downwards. This can easily lead to bending, wrinkling, or misalignment of the tape end, affecting the accurate application of the tape during subsequent sealing. Furthermore, the disturbance generated by the front pressure roller assembly 2 during its subsequent reset process further increases the risk of bending, wrinkling, or misalignment, thus affecting the stability and quality of subsequent sealing. In this application, after adopting a one-way transmission connection, the front pressure roller assembly 2 can be reset independently of the rear pressure roller assembly 3. The reset action can be completed before the blade assembly 7 cuts the tape 10. When the blade assembly 7 cuts the tape 10, the front pressure roller assembly 2 is already in the downward pressure state and does not need to perform a reset action. It will not generate additional downward pressure and disturbance on the tape 10, thereby effectively reducing the possible risk of the tape 10 bending, wrinkling or positional displacement, ensuring that the cut of the tape 10 stays stably in the predetermined position, and improving the tape position accuracy.

[0064] Understandably, in another embodiment: the second connecting member 6.3 includes a second abutting member, which is connected to the second input / output terminal. The second abutting member abuts against the front pressure roller assembly 2, allowing it to slide and rotate relative to the front pressure roller assembly 2. The abutting connection of the second abutting member is configured such that when the front pressure roller assembly 2 rotates and lifts in the forward direction, the second abutting member abuts against the rear pressure roller assembly 3 and drives the rear pressure roller assembly 3 to rotate and lift in the forward direction; when the front pressure roller assembly 2 rotates and presses down in the reverse direction, the second abutting member disengages from the rear pressure roller assembly 3. Preferably, the second abutting member is a roller, which is rotatably connected to the second input / output terminal. The roller can rotate freely relative to the second input / output terminal, effectively reducing frictional resistance during movement and improving transmission smoothness.

[0065] In the above technical solution, the transmission mechanism 6 is connected in one direction only through the second abutting member. Power is transmitted only when the front pressure roller assembly 2 rotates in the forward direction and disengages in the reverse direction. This allows the front pressure roller assembly 2 to rotate in the reverse direction and reset before the packaging box, thus resetting before the blade assembly 7. This increases the length of the tape 10 between the front pressure roller assembly 2 and the rear pressure roller assembly 3 while keeping the core length unchanged. This provides sufficient and stable tape allowance for the subsequent cutting action of the blade assembly 7. After the packaging box passes through the blade assembly 7, the blade assembly 7 needs to press down a certain distance before it can contact and press against the tape to complete the tape cutting action. At this time, the length of the tape left at the tail of the packaging box is increased. During the subsequent tape sealing process, the rear pressure roller assembly 3 can stably press the remaining tape onto the surface of the box. Due to the increased tape allowance, the problem of loose sealing caused by the tape being too short is effectively avoided. Furthermore, since the front pressure roller assembly 2 has already completed its reset action before the blade assembly 7 cuts, the tape is always in a taut state during the front pressure roller assembly 2, and it is not easy for it to loosen or shift, which can ensure that the tape position is accurate and does not shift. After the tape is cut, the front pressure roller assembly 2 will not pull on the tape, ensuring that the position of the cut tape is not easily shifted.

[0066] Example 7: like Figure 9 As shown, based on Embodiment 1, the lever assembly 6.1 includes a transmission lever 6.1.1. The transmission lever 6.1.1 includes a rotating part 6.1.11, a first connecting part 6.1.12, and a second connecting part 6.1.13. The rotating part 6.1.11 is rotatably connected to the movement side plate 1 via a rotating shaft. The first connecting member 6.2 is drive-connected to the first connecting part 6.1.12, and the second connecting member 6.3 is drive-connected to the second connecting part 6.1.13. The transmission lever 6.1.1 is located between the first connecting member 6.2 and the second connecting member 6.3, and the first connecting part 6.1.12 and the second connecting part 6.1.13 are located on the same side of the rotating part 6.1.11.

[0067] In the above technical solution, by placing the first connecting part 6.1.12 and the second connecting part 6.1.13 on the same side of the rotating part 6.1.11, the rotation direction switching of the front pressure roller assembly 2 and the rear pressure roller assembly 3 is realized. When the front end of the packaging box contacts the front pressure roller assembly 2 and lifts it forward, the first connecting member 6.2 drives the transmission lever 6.1.1 to rotate around the rotating shaft. Since the first connecting part 6.1.12 and the second connecting part 6.1.13 are located on the same side of the rotating part 6.1.11, and the stress arm of the first connecting member 6.2 is greater than that of the stress arm of the second connecting member 6.3, the transmission lever 6.1.1 drives the rear pressure roller assembly 3 to lift in the opposite direction with a smaller torque, realizing the coordinated control of front pressure saving and rear pressure linkage.

Claims

1. A carton sealing machine core, comprising a core side plate, a front pressure roller assembly, a rear pressure roller assembly, a second reset member, and a transmission mechanism, wherein the front pressure roller assembly and the rear pressure roller assembly are rotatably mounted on the core side plate, and the second reset member is configured to drive the rear pressure roller assembly to rotate in the forward direction; characterized in that The transmission mechanism includes a lever assembly, a first connecting member, and a second connecting member. The lever assembly includes at least one transmission lever, which is rotatably connected to the side plate of the movement. The front pressure wheel assembly is driven to the first input / output end of the lever assembly through the first connecting member, and the rear pressure wheel assembly is driven to the second input / output end of the lever assembly through the second connecting member. The lever assembly is configured such that at any given time, the equivalent force arm length of the first connecting member to the lever assembly is greater than the lever arm length of the second connecting member to the lever assembly.

2. An apparatus as claimed in claim 1, wherein, The first connector is a first link, and the two ends of the first link are respectively hinged to the first connector and the first input / output end; Alternatively, the first connecting member includes a first sliding member and a first rotating member. The first sliding member is slidably connected to the first input / output terminal, one end of the first rotating member is rotatably connected to the first sliding member, and the other end of the first rotating member is fixed to the front pressure roller assembly. Alternatively, the first connecting member includes a first sliding member and a first rotating member. The first sliding member is slidably connected to the front pressure roller assembly, one end of the first rotating member is rotatably connected to the first sliding member, and the other end of the first rotating member is fixed to the first input / output terminal. Alternatively, the first connector includes a first abutment, which is connected to the front pressure roller assembly. The first abutment abuts against the first input / output end so that the first abutment can slide and rotate relative to the first input / output end. The abutting connection of the first abutment is configured such that when the current pressure roller assembly rotates in the forward direction, the first abutment abuts against the first input / output end and drives the first input / output end to rotate; when the current pressure roller assembly rotates in the reverse direction, the first abutment disengages from the first input / output end. Alternatively, the first connector includes a first abutment, which is connected to the first input / output terminal. The first abutment abuts against the front pressure roller assembly so that the first abutment can slide and rotate relative to the front pressure roller assembly. The abutting connection of the first abutment is configured such that when the front pressure roller assembly rotates in the forward direction, the front pressure roller assembly abuts against the first abutment and drives the first input / output terminal to rotate; when the front pressure roller assembly rotates in the reverse direction, the front pressure roller assembly disengages from the first abutment.

3. An apparatus as claimed in claim 2, wherein the apparatus is configured to: The first abutting member is a roller, and the first abutting member is rotatably connected to the front pressure roller assembly or rotatably connected to the first input / output terminal.

4. The machine core of claim 1, wherein, The second connector is a second link, and the two ends of the second link are respectively hinged to the second connector and the second input / output end; Alternatively, the second connecting member includes a second sliding member and a second rotating member. The second sliding member is slidably connected to the second input / output terminal, one end of the second rotating member is rotatably connected to the second sliding member, and the other end of the second rotating member is fixed to the rear pressure roller assembly. Alternatively, the second connecting member includes a second sliding member and a second rotating member. The second sliding member is slidably connected to the rear pressure roller assembly, one end of the second rotating member is rotatably connected to the second sliding member, and the other end of the second rotating member is fixed to the second input / output terminal. Alternatively, the second connector includes a second abutment, which is connected to the rear pressure roller assembly. The second abutment abuts against the second input / output end so that the second abutment can slide and rotate relative to the second input / output end. The abutting connection of the second abutment is configured such that when the current pressure roller assembly rotates in the forward direction, the second input / output end abuts against the second abutment and drives the rear pressure roller assembly to rotate in the forward direction; when the current pressure roller assembly rotates in the reverse direction, the second abutment disengages from the second input / output end. Alternatively, the second connector includes a second abutment, which is connected to a second input / output terminal. The second abutment abuts against the front pressure roller assembly so that it can slide and rotate relative to the front pressure roller assembly. The abutting connection of the second abutment is configured such that when the front pressure roller assembly rotates in the forward direction, the second abutment abuts against the rear pressure roller assembly and drives the rear pressure roller assembly to rotate in the forward direction; when the front pressure roller assembly rotates in the reverse direction, the second abutment disengages from the rear pressure roller assembly.

5. The sealing machine core according to claim 1, characterized in that, The two adjacent transmission levers are connected by a third connector: The third connecting member is a third link, and the two ends of the third link are respectively hinged to two adjacent transmission levers; Alternatively, the third connecting member includes a third sliding member and a third rotating member. The third sliding member is slidably connected to the first of two adjacent transmission levers, one end of the third rotating member is rotatably connected to the third sliding member, and the other end of the third rotating member is fixed to the second of two adjacent transmission levers. Alternatively, the third connecting member includes a third abutment member, which is connected to the first of two adjacent transmission levers. The third abutment member abuts against the second of the two adjacent transmission levers, so that the third abutment member can slide and rotate relative to the second transmission lever. The abutting connection of the third abutment member is configured such that when the current pressure roller assembly rotates in the forward direction, the third abutment member abuts against and drives the second transmission lever to rotate; when the current pressure roller assembly rotates in the reverse direction, the third abutment member disengages from the second transmission lever.

6. An apparatus as claimed in claim 5, wherein the apparatus is configured to: The third abutment is a roller, and the third abutment is rotatably connected to the second transmission lever.

7. The machine core of claim 1, wherein, The lever assembly includes a transmission lever, which includes a rotating part, a first connecting part, and a second connecting part. The rotating part is rotatably connected to the side plate of the movement via a rotating shaft. The first connecting member is pulsatorically connected to the first connecting part, and the second connecting member is pulsatorically connected to the second connecting part. The transmission lever is located between the first connecting member and the second connecting member, and the first connecting part and the second connecting part are located on the same side of the rotating part.

8. The machine core of claim 1, wherein, It also includes a first reset element, which is configured to drive the current pressure roller assembly to rotate in the opposite direction; Alternatively, the front pressure roller assembly has a raised state and a lowered state, and the center of gravity height of the front pressure roller assembly decreases from the raised state to the lowered state.

9. The machine core of claim 1, wherein, The movement side plate is provided with a stop bar, and the front pressure roller assembly is provided with a limiting piece. When the front pressure roller assembly is reset by the first reset member, the limiting piece abuts against the stop bar.

10. The machine core of claim 1, wherein, The rear pressure roller assembly is rotatably mounted on the side plate of the movement via a first rotating shaft. The rear pressure roller assembly is equipped with an adjustment component and a second reset component, which is a torsion spring. The adjustment component has several positions. The second reset component is sleeved on the first rotating shaft, with one end of the second reset component connected to the first rotating shaft and the other end connected to any one of the positions.

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