Intermittent box filling machine cam replacement mechanism and control method thereof

Abstract

The application discloses a cam replacement mechanism of an intermittent boxing machine, which comprises a main shaft, a driving motor and a cam set fixed on the main shaft; the driving motor is in transmission connection with the main shaft and is used for providing a power source for rotation of the main shaft; the cam set is in transmission connection with each movement mechanism of the intermittent boxing machine, and when the main shaft rotates, the cam set drives each movement mechanism of the intermittent boxing machine to continuously and periodically work. The application further discloses a control method of the cam replacement mechanism of the intermittent boxing machine. The cam replacement mechanism of the intermittent boxing machine provided by the application can make the overall structure of the intermittent boxing machine equipment more compact and higher in reliability, and can improve the working efficiency of the intermittent boxing machine.

Description

Technical Field

[0001] This invention relates to the field of packaging machinery technology, and in particular to a cam replacement mechanism for an intermittent cartoning machine and its control method. Background Technology

[0002] Intermittent cartoning machines are a common type of intermittent cartoning machinery, especially prevalent in the pharmaceutical packaging industry. They work by combining pharmaceutical materials and instructions, and automatically loading them into cartons without human intervention. The main components of the machine include a guide hopper mechanism, a push rod mechanism, a clamping mechanism, a feeding conveyor mechanism, and a closing conveyor mechanism.

[0003] However, the operation of the main mechanisms of existing intermittent cartoning machines is mostly controlled by multiple servo systems. Due to the intermittent nature of cartoning, the servo motion patterns are not continuous, which limits the overall efficiency of the equipment.

[0004] Based on this, a cam replacement mechanism for an intermittent cartoning machine and its control method are proposed to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a cam replacement mechanism and its control method for an intermittent cartoning machine, thereby improving the working efficiency of the intermittent cartoning machine.

[0006] To solve the above-mentioned technical problems, the present invention provides an intermittent cartoning machine cam replacement mechanism, including a main shaft, a drive motor and a cam assembly fixed on the main shaft; The drive motor is connected to the main shaft and is used to provide a power source for the rotation of the main shaft; The cam assembly is connected to the various motion mechanisms of the intermittent cartoning machine. When the main shaft rotates, the cam assembly drives the various motion mechanisms of the intermittent cartoning machine to perform continuous cyclic operations.

[0007] Furthermore, the cam assembly includes a guide cam, a push rod cam, an opening and closing cam, a lifting cam, and two intermittent cams; The lifting cam is connected to the gripping mechanism of the intermittent cartoning machine. When the main shaft rotates one revolution, the lifting cam controls the gripping mechanism to perform one round of reciprocating lifting motion. The opening and closing cam is connected to the gripping mechanism of the intermittent cartoning machine. When the main shaft rotates one revolution, the opening and closing cam controls the gripper of the gripping mechanism to perform one round of opening and closing motion. The guide cam is connected to the material guide mechanism of the intermittent cartoning machine. When the main shaft rotates one revolution, the guide cam controls the material guide mechanism to perform one round of reciprocating lateral movement. The push rod cam is connected to the push rod mechanism of the intermittent cartoning machine. When the main shaft rotates one revolution, the push rod cam controls the push rod mechanism to perform one round of reciprocating lateral movement. The two intermittent cams are respectively connected to the feeding conveying mechanism and the box conveying mechanism of the intermittent cartoning machine. When the main shaft rotates once, the two intermittent cams respectively control the feeding conveying mechanism and the box conveying mechanism to perform one round of intermittent motion.

[0008] Furthermore, both intermittent cams and the lifting cam are fixed to the main shaft by tapered pins. The guide cam, push rod cam, and opening / closing cam are all movably fitted with mounting seats. The mounting seats are fixed to the main shaft by tapered pins, and fastening screws are installed on the mounting seats.

[0009] Furthermore, the main body of the intermittent cam is cylindrical, and a guide groove structure is formed on the surface of the intermittent cam. The guide groove structure is connected to a sprocket through a rotary drive component. The guide groove structure includes a drive groove and a transition groove connected to the drive groove; The drive groove occupies one-third of the circumference of the intermittent cam. When the rotary drive acts on the drive groove, the sprocket rotates; when the rotary drive acts on the transition groove, the sprocket remains stationary.

[0010] Furthermore, the main shaft is connected to a handwheel adjustment mechanism, which is used to manually rotate the main shaft for equipment debugging and maintenance; The handwheel adjustment mechanism includes a driven helical gear, a driving helical gear, a handwheel shaft, and a handwheel; The driven helical gear is fixed to the main shaft by a tapered pin; The drive helical gear is connected to the handwheel via the handwheel shaft; A connecting seat is movably fitted on the handwheel shaft.

[0011] Furthermore, the handwheel shaft is provided with a first groove and a second groove at intervals along its length, and the connecting seat is threaded with a pin that mates with the first groove and the second groove; When the pin is located in the first groove, the driven helical gear and the driving helical gear mesh; when the pin is located in the second groove, the driven helical gear and the driving helical gear disengage. The driven helical gear and the driving helical gear are arranged in a cross-shaped pattern.

[0012] The present invention also provides a control method for a cam replacement mechanism of an intermittent cartoning machine, comprising the following steps: The cam replacement mechanism is fixedly installed so that its cam assembly is connected to the corresponding mechanisms of the intermittent cartoning machine; Perform debugging work on the intermittent cartoning machine to ensure that each mechanism of the intermittent cartoning machine is in a suitable initial state; The power source is started, and the cam group controls the various mechanisms of the intermittent cartoning machine to perform continuous cyclic operations to realize the cartoning operation; the working time of each mechanism of the intermittent cartoning machine in one cycle is the time it takes for the main shaft to rotate one revolution.

[0013] Furthermore, the specific operating steps for debugging the intermittent cartoning machine are as follows: The main shaft is rotated by using a handwheel adjustment mechanism, so that the connection point between the rotary drive and the intermittent cam is located at the connection point between the transition groove and the drive groove; After adjusting the feeding conveyor and box conveyor of the intermittent cartoning machine to the appropriate positions, use chains to connect them to the two intermittent cam drives respectively; The guide cam and push rod cam are rotated to adjust the position of the feed bin mechanism and push rod mechanism of the intermittent cartoning machine, and the opening and closing cam is rotated to put the clamp of the clamping mechanism of the intermittent cartoning machine into the appropriate state.

[0014] Furthermore, the working time of each mechanism of the intermittent cartoning machine in one cycle includes two time nodes, namely the first time node and the second time node. The workflow of each mechanism of the intermittent cartoning machine controlled by the cam group within the first time node is as follows: The connection point between the rotary drive and the intermittent cam moves from one end of the transition groove to the other end of the transition groove, while the feeding conveyor and the box conveyor are in a stopped state. The lifting cam controls the clamping mechanism to rise to the highest point and then descend to the lowest point, and then controls the clamping mechanism to reset. The clamping mechanism controlled by the opening and closing cam gradually closes, and is fully closed after the clamping mechanism reaches its highest point; then it is gradually released as the clamping mechanism descends, and is fully released after the clamping mechanism reaches its lowest point; after the clamping mechanism is fully released, the clamping mechanism controlled by the opening and closing cam resets. The guide cam controls the material guide bin mechanism to move laterally from directly below the feeding conveyor mechanism toward the box conveyor mechanism. Once the material guide bin mechanism reaches directly above the box conveyor mechanism, the guide cam controls the material guide bin mechanism to adjust and reset. The push rod cam controls the push rod mechanism to move laterally toward the box conveying mechanism. After the push rod mechanism moves laterally to the designated position, the push rod cam controls the push rod mechanism to adjust and reset.

[0015] Furthermore, the workflow of each mechanism of the intermittent cartoning machine controlled by the cam group within the second time node is as follows: The connection point between the rotary drive and the intermittent cam moves from one end of the drive groove to the other end of the drive groove. The two intermittent cams control the movement of the feeding conveyor mechanism and the box conveyor mechanism, respectively. The lifting cam, opening and closing cam, guide cam, and push rod cam control the clamping mechanism, the clamping fixture of the clamping mechanism, the guide bin mechanism, and the push rod mechanism to complete the reset operation that was not completed at the first time node.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: The cam replacement mechanism for the intermittent cartoning machine provided by this invention serves as a unified transfer component for the power source of each mechanism in the intermittent cartoning machine. It only requires connecting a main shaft to a single drive mechanism to realize the operation of multiple mechanisms in the intermittent cartoning machine. Compared with traditional multi-servo control, it makes the overall structure of the intermittent cartoning machine more compact and more reliable. At the same time, when the speed changes, each mechanism can achieve more stable movement, and the mechanisms can also maintain synchronization. Furthermore, the actions can be superimposed, and the next action can begin before the previous action is finished. Therefore, the cycle time can be shortened, which improves the working efficiency of the intermittent cartoning machine. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the intermittent cartoning machine cam replacement mechanism in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the drive arm component in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the installation of the cam assembly and the drive arm component in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram showing the installation of the cam replacement mechanism of the intermittent cartoning machine and the main body of the intermittent cartoning machine according to Embodiment 1 of the present invention. Figure 5 This is a rear view of the installation schematic diagram of the cam replacement mechanism of the intermittent cartoning machine and the main body of the intermittent cartoning machine according to Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the mounting base structure according to Embodiment 1 of the present invention; Figure 7 This is a schematic cross-sectional view of the handwheel shaft in the intermittent cartoning machine cam replacement mechanism of the present invention. Detailed Implementation

[0018] The intermittent cartoning machine cam replacement mechanism and its control method of the present invention will be described in more detail below with reference to the schematic diagrams, which illustrate preferred embodiments of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving the advantageous effects of the invention. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the invention.

[0019] The invention is described more specifically by way of example in the following paragraphs with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0020] Example 1 like Figure 1 As shown in the figure, an embodiment of the present invention proposes a cam replacement mechanism for an intermittent cartoning machine, including a main shaft 1, a drive motor 13, and a cam assembly fixed on the main shaft 1; the drive motor 13 is connected to the main shaft 1 for transmission and is used to provide a power source for the rotation of the main shaft 1; the cam assembly is connected to each motion mechanism of the intermittent cartoning machine for transmission, and when the main shaft 1 rotates, the cam assembly drives each motion mechanism of the intermittent cartoning machine to perform continuous periodic operation.

[0021] Specifically, the cam assembly includes a guide cam 2, a push rod cam 3, an opening and closing cam 4, a lifting cam 5, and two intermittent cams 6; The lifting cam 5 is connected to the gripping mechanism of the intermittent cartoning machine. When the main shaft 1 rotates one revolution, the lifting cam 5 controls the gripping mechanism to perform one round of reciprocating lifting motion. The opening and closing cam 4 is connected to the clamping mechanism of the intermittent cartoning machine. When the main shaft 1 rotates one revolution, the opening and closing cam 4 controls the clamping fixture of the clamping mechanism to perform one round of opening and closing motion. The guide cam 2 is connected to the material guide mechanism of the intermittent cartoning machine. When the main shaft 1 rotates one revolution, the guide cam 2 controls the material guide mechanism to perform one round of reciprocating lateral movement. The push rod cam 3 is connected to the push rod mechanism of the intermittent cartoning machine. When the main shaft 1 rotates one revolution, the push rod cam 3 controls the push rod mechanism to perform one round of reciprocating lateral movement. The two intermittent cams 6 are respectively connected to the feeding conveying mechanism and the box conveying mechanism of the intermittent cartoning machine. When the main shaft 1 rotates once, the two intermittent cams 6 respectively control the feeding conveying mechanism and the box conveying mechanism to perform one round of intermittent motion.

[0022] In this embodiment, both ends of the main shaft 1 are rotatably mounted with fixed seats 10. Multiple fixing holes are provided on the fixed seats 10. Bolts are passed through the fixing holes and tightened to mount the main shaft 1 at the corresponding positions on the main body b of the intermittent cartoning machine (e.g., ...). Figure 4 and Figure 5 As shown), it connects to various mechanisms of the main body of the equipment and acts on the relevant drive arm component a (as shown) within the main body of the equipment. Figure 3 (As shown).

[0023] Preferably, the spindle 1 is rotatably connected to the fixed seat 10 via an outer spherical bearing (not shown in the figure). The outer spherical bearing is actually a variation of the deep groove ball bearing, characterized by its outer ring outer diameter surface being spherical, which can fit into the corresponding concave spherical surface of the bearing seat to achieve self-aligning.

[0024] Combined with reference Figure 2 , Figure 2 This is a structural diagram of the drive arm component a within the main body of the equipment, which consists of multiple movable swing arms. Among them, the guide cam 2, push rod cam 3, opening and closing cam 4, and lifting cam 5 can each act on the drive arm component a to drive different swing arms.

[0025] Specifically, refer to Figure 2 The first swing arm 15 of the drive arm component a is the drive arm of the guide bin mechanism of the intermittent cartoning machine and is connected to the guide cam 2. When the guide cam 2 drives the first swing arm 15 to swing, it will drive the guide bin mechanism to move laterally, transporting the material to the position to be pushed by the push rod. The second swing arm 16 and the third swing arm 20 are the drive arms of the push rod mechanism of the intermittent cartoning machine. When the second swing arm 16 and the third swing arm 20 swing, the stroke is amplified, pushing the material located at the position to be pushed by the push rod into the packaging box. The fourth swing arm 17, the fifth swing arm 18 and the sixth swing arm 19 cooperate to be the drive arms for the lifting and lowering of the clamping mechanism and the opening and closing of the clamps of the intermittent cartoning machine. The three cooperate with each other to control the clamping mechanism to clamp the instruction manual to the appropriate position.

[0026] In this embodiment, no changes were made to the drive arm component a. Its structure and function are existing technologies. Those skilled in the art should know how it controls the material guide mechanism, push rod mechanism and clamping mechanism. It will not be described in detail here.

[0027] In a specific example, the main body of the intermittent cam 6 is cylindrical, and the surface of the intermittent cam 6 is provided with a guide groove structure, which is connected to the sprocket 11 through the rotary drive component 12. The guide groove structure includes a drive groove 61 and a transition groove 62 connected to the drive groove 61; The drive groove 61 occupies one-third of the circumference of the intermittent cam. When the rotary drive 12 acts on the drive groove 61, the sprocket 11 rotates. When the rotary drive 12 acts on the transition groove 62, the sprocket 11 is stationary. That is, the intermittent cam 6 rotates 360° in one revolution, and the guide sprocket 11 rotates 120°.

[0028] In an optional embodiment, motor 13 is a 1.5KW servo motor, fixed at the corresponding position on the main body b of the equipment, and transmits torque to the main shaft 1 through chain drive. Specifically, a transmission sprocket is fixed on the main shaft 1 by a tapered pin, and the transmission sprocket is connected to the motor drive through a chain. The tapered pin is designed with a taper ratio of 1:50, which is convenient for assembly and ensures positioning accuracy.

[0029] In one specific embodiment, the two intermittent cams 6 and the lifting cam 5 are all fixed to the main shaft 1 by tapered pins. The guide cam 2, push rod cam 3, and opening / closing cam 4 are all movably fitted with mounting seats 7. The mounting seats 7 are fixed to the main shaft by tapered pins, and fastening screws 9 (such as...) are installed on the mounting seats 7. Figure 4 (As shown). Preferably, the taper ratio of the tapered pin is 1:50.

[0030] The guide cam 2, push rod cam 3, and opening / closing cam 4 are all movably fitted with mounting seats 7, which facilitates the adjustment of the guide cam 2, push rod cam 3, and opening / closing cam 4 after installation.

[0031] Specifically, refer to Figure 6 The mounting base 7 consists of a circular limiting plate 71 and a circular positioning boss 72. The diameter of the limiting plate 71 is larger than the diameter of the positioning boss 72, and a movable arc groove 73 is formed through the end face of the limiting plate 71. When installing the guide cam 2, the positioning boss 72 is fixed to the main shaft 1 using a tapered pin. Then, the guide cam 2 is fitted onto the positioning boss 72, and a fastening screw 9 is used to connect and tighten it to the guide cam 2 through the movable arc groove 73, completing the installation of the guide cam 2. When adjustment of the guide cam 2 is required, simply loosen the fastening screw 9; the operation is simple. The installation and subsequent adjustment of the push rod cam 3 and the opening / closing cam 4 are the same as those of the guide cam 2 described above, and will not be elaborated further here.

[0032] In a preferred embodiment, the spindle 1 is driven by a handwheel adjustment mechanism 8, which is used to manually rotate the spindle 1 for equipment debugging and maintenance.

[0033] Specifically, the handwheel adjustment mechanism 8 includes a driven helical gear 81, a driving helical gear 82, a handwheel shaft 83, and a handwheel 84. The driven helical gear 81 is fixed to the main shaft by a tapered pin with a taper ratio of 1:50. The driving helical gear 82 is connected to the handwheel 84 through the handwheel shaft 83, and a connecting seat 85 is movably sleeved on the handwheel shaft 83.

[0034] The connecting seat 85 is fixed at the corresponding position on one side of the main body b of the equipment. By rotating the handwheel 84, the main shaft 1 is driven to rotate under the transmission of the driven helical gear 81 and the driving helical gear 82, which facilitates the debugging and maintenance of the equipment.

[0035] Furthermore, in conjunction with reference Figure 7 The handwheel shaft 83 is provided with a first groove 86 and a second groove 87 at intervals along its length, and the connecting seat 85 is threaded with a pin 88 that mates with the first groove 86 and the second groove 87.

[0036] Specifically, the driven helical gear 81 and the driving helical gear 82 are arranged in a cross pattern. When the pin 88 is located in the first groove 86, the driven helical gear 81 and the driving helical gear 82 mesh. At this time, the handwheel 84 can be rotated to drive the main shaft 1 to rotate. With the intermittent cam 6 and the lifting cam 5 as references, the installation angles of the guide cam 2, the push rod cam 3 and the opening and closing cam 4 can be adjusted to realize the debugging and maintenance of the equipment.

[0037] When the pin 88 is located in the second groove 87, the driven helical gear 81 and the driving helical gear 82 separate. At this time, even if the handwheel 84 is turned, it will not be able to drive the main shaft 1 to rotate, so that the equipment is out of the debugging and maintenance state.

[0038] Example 2 Based on Embodiment 1, this embodiment proposes a control method for a cam replacement mechanism in an intermittent cartoning machine, specifically including the following steps: S1. Fix the cam replacement mechanism so that its cam group is connected to the corresponding mechanisms of the intermittent cartoning machine; S2. Perform debugging work on the intermittent cartoning machine to ensure that each mechanism of the intermittent cartoning machine is in a suitable initial state; S3. Start the power source and use the cam group to control each mechanism of the intermittent cartoning machine to perform continuous cyclic operation to realize the cartoning operation; the working time of each mechanism of the intermittent cartoning machine in one cycle is the time for the main shaft to rotate one revolution.

[0039] In the above embodiments, the specific operation steps for debugging the intermittent cartoning machine are as follows: S21. The main shaft 1 is rotated by the handwheel adjustment mechanism 8, so that the connection point between the rotary drive component 12 and the intermittent cam 6 is located at the connection point between the transition groove 62 and the drive groove 61. S22. After adjusting the feeding conveyor and box conveyor of the intermittent cartoning machine to the appropriate positions, use a chain to connect them to the two intermittent cams 6 respectively. S23. Rotate the guide cam 2 and push rod cam 3 to adjust the position of the feed bin mechanism and push rod mechanism of the intermittent cartoning machine, and rotate the opening and closing cam 4 to put the clamp of the clamping mechanism of the intermittent cartoning machine in a suitable state.

[0040] In the above embodiments, in order to facilitate a detailed description of the operation process of each mechanism of the intermittent cartoning machine in one cycle, the operation time of each mechanism of the intermittent cartoning machine in one cycle is defined as two time nodes, namely the first time node and the second time node. The time when the connection point of the rotary drive 12 and the intermittent cam 6 moves from one end of the transition groove 62 to the other end of the transition groove 62 is defined as the first time node, and the time when the connection point of the rotary drive 12 and the intermittent cam 6 moves from one end of the drive groove 61 to the other end of the drive groove 61 is defined as the second time node. Specifically, the workflow of each mechanism of the intermittent cartoning machine controlled by the cam group within the first time node is as follows: The feeding conveyor and the box conveyor are both out of service. The lifting cam 5 controls the clamping mechanism to rise to the highest point and then descend to the lowest point, and then controls the clamping mechanism to reset. The opening and closing cam 4 controls the clamping mechanism to gradually close, and the clamping mechanism is fully closed after reaching the highest point; then it is gradually released when the clamping mechanism descends, and is fully released after reaching the lowest point; after the clamping mechanism is fully released, the opening and closing cam 4 controls the clamping mechanism to reset. Guide cam 2 controls the material guide bin mechanism to move laterally from directly below the feeding conveyor mechanism toward the box conveyor mechanism. After the material guide bin mechanism reaches directly above the box conveyor mechanism, guide cam 2 controls the material guide bin mechanism to adjust and reset. The push rod cam 3 controls the push rod mechanism to move laterally toward the box conveying mechanism. After the push rod mechanism moves laterally to the designated position, the push rod cam 3 controls the push rod mechanism to adjust and reset.

[0041] The workflow of each mechanism of the intermittent cartoning machine controlled by the cam group within the second time node is as follows: Two intermittent cams 6 control the movement of the feeding conveyor mechanism and the box conveyor mechanism, respectively; The lifting cam 5, opening and closing cam 4, guide cam 2 and push rod cam 3 respectively control the clamping mechanism, the clamping fixture of the clamping mechanism, the guide bin mechanism and the push rod mechanism to complete the reset operation that was not completed at the first time node.

[0042] As can be seen from the above, the general workflow of the intermittent cartoning machine under the action of the intermittent cartoning machine cam replacement mechanism is as follows: the motor 13, as the driving mechanism, inputs power to the main shaft 1, and the main shaft 1 transmits power to each actuator. The dynamic-to-static ratio of the intermittent cam 6 is 120°:240°. When the intermittent cam 6 is in the 120° time period, the two intermittent cams 6 drive the feeding mechanism and the closing mechanism to input the material and complete the closing of a carton. When the intermittent cam 6 is in the 240° time period, the opening and closing cam 4 and the lifting cam 5 control the clamping mechanism to send the instruction manual to the guide position. Then, the guide cam 2 controls the guide hopper mechanism to move, and at the same time, the push rod cam 3 controls the push rod mechanism to push the material and instruction manual in the station into the carton and exit the relevant station. At this time, the action of the first intermittent cam and the second intermittent cam within 240° has been completed. When the first intermittent cam and the second intermittent cam continue to rotate to 120°, a whole set of actions is completed.

[0043] In summary, by using the intermittent cartoning machine cam replacement mechanism provided by this invention as a unified transfer component for the power source of each mechanism in the intermittent cartoning machine, the operation of multiple mechanisms in the intermittent cartoning machine can be realized by connecting only one drive mechanism with the main shaft. Compared with traditional multi-servo control, this makes the overall structure of the intermittent cartoning machine more compact and more reliable. At the same time, when the speed changes, each mechanism can achieve more stable movement, and the mechanisms can also maintain synchronization. Furthermore, the actions can be superimposed, and the next action can start before the previous action is finished, thus shortening the cycle time and improving the working efficiency of the intermittent cartoning machine.

[0044] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A cam replacement mechanism for an intermittent cartoning machine, characterized in that, Includes a main shaft, a drive motor, and a cam assembly fixed on the main shaft; The drive motor is connected to the main shaft and is used to provide a power source for the rotation of the main shaft; The cam assembly is connected to each motion mechanism of the intermittent cartoning machine. When the main shaft rotates, the cam assembly drives each motion mechanism of the intermittent cartoning machine to perform continuous cyclic operation. The cam assembly includes a guide cam, a push rod cam, an opening and closing cam, a lifting cam, and two intermittent cams; The lifting cam is connected to the gripping mechanism of the intermittent cartoning machine. When the main shaft rotates one revolution, the lifting cam controls the gripping mechanism to perform one round of reciprocating lifting motion. The opening and closing cam is connected to the gripping mechanism of the intermittent cartoning machine. When the main shaft rotates one revolution, the opening and closing cam controls the gripper of the gripping mechanism to perform one round of opening and closing motion. The guide cam is connected to the material guide mechanism of the intermittent cartoning machine. When the main shaft rotates one revolution, the guide cam controls the material guide mechanism to perform one round of reciprocating lateral movement. The push rod cam is connected to the push rod mechanism of the intermittent cartoning machine. When the main shaft rotates one revolution, the push rod cam controls the push rod mechanism to perform one round of reciprocating lateral movement. The two intermittent cams are respectively connected to the feeding conveying mechanism and the box conveying mechanism of the intermittent cartoning machine. When the main shaft rotates one revolution, the two intermittent cams respectively control the feeding conveying mechanism and the box conveying mechanism to perform one round of intermittent motion. The main body of the intermittent cam is cylindrical, and the surface of the intermittent cam is provided with a guide groove structure. The guide groove structure is connected to a sprocket through a rotary drive component. The guide groove structure includes a drive groove and a transition groove connected to the drive groove; The drive groove occupies one-third of the circumference of the intermittent cam, and the sprocket rotates when the rotary drive acts on the drive groove. When the rotary drive acts on the transition groove, the sprocket is stationary.

2. The intermittent cartoning machine cam replacement mechanism as described in claim 1, characterized in that, Both intermittent cams and the lifting cam are fixed to the main shaft by tapered pins. The guide cam, push rod cam, and opening / closing cam are all movably fitted with mounting seats. The mounting seats are fixed to the main shaft by tapered pins, and fastening screws are installed on the mounting seats.

3. The intermittent cartoning machine cam replacement mechanism as described in claim 2, characterized in that, The main shaft is connected to a handwheel adjustment mechanism, which is used to manually rotate the main shaft for equipment debugging and maintenance. The handwheel adjustment mechanism includes a driven helical gear, a driving helical gear, a handwheel shaft, and a handwheel; The driven helical gear is fixed to the main shaft by a tapered pin; The drive helical gear is connected to the handwheel via the handwheel shaft; A connecting seat is movably fitted on the handwheel shaft.

4. The intermittent cartoning machine cam replacement mechanism as described in claim 3, characterized in that, The handwheel shaft is provided with a first groove and a second groove at intervals along its length, and the connecting seat is threaded with a pin that mates with the first groove and the second groove. When the pin is located in the first groove, the driven helical gear and the driving helical gear mesh; when the pin is located in the second groove, the driven helical gear and the driving helical gear disengage. The driven helical gear and the driving helical gear are arranged in a cross-shaped pattern.

5. A control method for a cam replacement mechanism of an intermittent cartoning machine, employing the cam replacement mechanism of an intermittent cartoning machine as described in any one of claims 1-4, characterized in that, Includes the following steps: The cam replacement mechanism is fixedly installed so that its cam assembly is connected to the corresponding mechanisms of the intermittent cartoning machine; Perform debugging work on the intermittent cartoning machine to ensure that each mechanism of the intermittent cartoning machine is in a suitable initial state; The power source is started, and the cam group controls the various mechanisms of the intermittent cartoning machine to perform continuous cyclic operations to realize the cartoning operation; the working time of each mechanism of the intermittent cartoning machine in one cycle is the time it takes for the main shaft to rotate one revolution. The operation time of each mechanism of the intermittent cartoning machine in one cycle includes two time nodes, namely the first time node and the second time node. The workflow of each mechanism of the intermittent cartoning machine controlled by the cam group within the first time node is as follows: The connection point between the rotary drive and the intermittent cam moves from one end of the transition groove to the other end of the transition groove, while the feeding conveyor and the box conveyor are in a stopped state. The lifting cam controls the clamping mechanism to rise to the highest point and then descend to the lowest point, and then controls the clamping mechanism to reset. The clamping mechanism controlled by the opening and closing cam gradually closes, and is fully closed after the clamping mechanism reaches its highest point; then it is gradually released as the clamping mechanism descends, and is fully released after the clamping mechanism reaches its lowest point; after the clamping mechanism is fully released, the clamping mechanism controlled by the opening and closing cam resets. The guide cam controls the material guide bin mechanism to move laterally from directly below the feeding conveyor mechanism toward the box conveyor mechanism. Once the material guide bin mechanism reaches directly above the box conveyor mechanism, the guide cam controls the material guide bin mechanism to adjust and reset. The push rod cam controls the push rod mechanism to move laterally toward the box conveying mechanism. After the push rod mechanism moves laterally to the designated position, the push rod cam controls the push rod mechanism to adjust and reset. The workflow of each mechanism of the intermittent cartoning machine controlled by the cam group within the second time node is as follows: The connection point between the rotary drive and the intermittent cam moves from one end of the drive groove to the other end of the drive groove. The two intermittent cams control the movement of the feeding conveyor mechanism and the box conveyor mechanism, respectively. The lifting cam, opening and closing cam, guide cam, and push rod cam control the clamping mechanism, the clamping fixture of the clamping mechanism, the guide bin mechanism, and the push rod mechanism to complete the reset operation that was not completed at the first time node.

6. The control method for the intermittent cartoning machine cam replacement mechanism as described in claim 5, characterized in that, The specific operating steps for debugging the intermittent cartoning machine are as follows: The main shaft is rotated by using a handwheel adjustment mechanism, so that the connection point between the rotary drive and the intermittent cam is located at the connection point between the transition groove and the drive groove; After adjusting the feeding conveyor and box conveyor of the intermittent cartoning machine to the appropriate positions, use chains to connect them to the two intermittent cam drives respectively; The guide cam and push rod cam are rotated to adjust the position of the feed bin mechanism, push rod mechanism and clamping mechanism of the intermittent cartoning machine, and the opening and closing cam is rotated to put the clamp of the clamping mechanism of the intermittent cartoning machine into the appropriate state.

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