Synchronous driving device for multiple units of die-cutting machine

Abstract

The die cutting machine multi-unit synchronous driving device comprises at least two driving assemblies arranged side by side along the process direction, and a first servo motor, a second servo motor, a first transmission assembly and a second transmission assembly. Each transmission assembly comprises a transmission shaft and a clutch. Each driving assembly is provided with an input shaft, an input wheel, an output shaft and an output wheel. The input wheel and the output wheel are drivingly connected by a transmission belt. The two transmission assemblies are alternatively arranged between the adjacent driving assemblies, on the outer sides of the two side driving assemblies, or one is arranged between the adjacent driving assemblies and the other is arranged on the outer side. The transmission shaft and the coupling of the transmission assembly are connected with the input shaft of the corresponding driving assembly. The device realizes multi-process synchronous driving through the cooperation of the double servo motors and the clutch, ensures the synchronization accuracy between the processes, reduces the requirement for the output torque of a single motor, and improves the flexibility of the layout through the multiple optional arrangement positions. The device is especially suitable for the die cutting machine system with the number of driving assemblies not less than two.

Description

Technical Field

[0001] This utility model relates to the field of die-cutting machine technology, specifically to a multi-unit synchronous drive device for die-cutting machines. Background Technology

[0002] Die-cutting machines are key equipment in the printing and packaging industry used for die-cutting, creasing, waste removal, and paper collection of materials such as paper and cardboard. A typical flatbed die-cutting machine usually includes multiple process units such as paper feeding, die-cutting, and waste removal. Each process unit needs to be synchronized through a drive device to ensure processing accuracy and production efficiency.

[0003] Currently, there are two main approaches to multi-process drive systems in die-cutting machines: First, each drive unit is driven by a separate servo motor, meaning each process unit is driven by an independent motor. The disadvantage of this approach is that each process unit operates independently, resulting in poor synchronization. Asynchrony leads to a large number of defective products, and each process unit requires a separate synchronization adjustment mechanism to ensure accuracy, resulting in a complex structure and high cost. Second, a single high-power motor drives three drive units simultaneously via a long transmission shaft. While this approach offers higher synchronization, it places extremely high demands on the motor's torque output. At high speeds, the excessively long transmission shaft is prone to twisting or vibration, leading to damage to the transmission gears. Furthermore, the large-scale motor increases the overall cost of the equipment.

[0004] Therefore, there is an urgent need for a drive device that can ensure the synchronization accuracy between multiple processes, reduce the torque requirements of a single motor, and has a flexible structural layout. Utility Model Content

[0005] The purpose of this invention is to provide a multi-unit synchronous drive device for die-cutting machines, so as to solve the technical problems of poor synchronization of multi-motor independent drive and high requirements for torque and transmission shaft of single motor drive in the prior art.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a multi-unit synchronous drive device for a die-cutting machine, including at least two drive components arranged side by side along the process direction, preferably two, three or more, forming the drive basis for multiple continuous process units. The device also includes a first servo motor and a second servo motor; a first transmission assembly and a second transmission assembly, each including a transmission shaft and a clutch mounted on the transmission shaft; each drive assembly has an input shaft and an output shaft, the input shaft having an input wheel and the output shaft having an output wheel, the input wheel and the output wheel being connected by a conveyor belt; the first transmission assembly and the second transmission assembly are optionally arranged in the following positions: • The two transmission assemblies are respectively located between adjacent drive assemblies; or, the two transmission assemblies are respectively located outside the two outermost drive assemblies; or, one transmission assembly is located between adjacent drive assemblies, and the other transmission assembly is located outside the remaining drive assemblies, in which case the two ends of the transmission shaft of the transmission assembly located between adjacent drive assemblies are respectively connected to the input shafts of the two drive assemblies on both sides via couplings, the transmission shaft of the outer transmission assembly is connected to the input shaft of its adjacent drive assembly via a coupling, and the input shaft of the middle drive assembly is connected to the input shaft of its adjacent drive assembly via a coupling; The first servo motor drives the corresponding input shaft through the first transmission component, the second servo motor drives the corresponding input shaft through the second transmission component, and the clutch is used to control the on and off of the transmission connection between the servo motor and the corresponding input shaft.

[0007] Preferably, the first drive assembly, the second drive assembly, and the third drive assembly are all provided with a tensioning assembly. The tensioning assembly includes a tensioning seat, a slider slidably disposed on the tensioning seat, a tensioning wheel rotatably disposed on the slider, and an adjusting screw for driving the slider to slide. The tensioning wheel abuts against the conveyor belt, and the tensioning seat is provided with a locking structure for locking the slider in the adjusting position.

[0008] Preferably, the tensioning seat is provided with an inclined groove, the slider is slidably disposed in the groove, the adjusting screw is rotatably connected to the tensioning seat and one end is threadedly connected to the slider; the locking structure includes a tensioning elongated hole opened in the groove, a locking screw disposed on the slider and a locking pressure plate threadedly connected to the locking screw, the locking screw passes through the tensioning elongated hole, and the slider is fixed to the groove by tightening the locking pressure plate.

[0009] Preferably, the system also includes a controller electrically connected to the first servo motor, the second servo motor, and the two clutches. The controller is configured to: first control the first servo motor and the second servo motor to start under no-load and achieve speed synchronization during startup, and then control the two clutches to engage simultaneously to transmit power synchronously to each drive component.

[0010] The beneficial effects of this utility model are: 1. By using dual servo motors in conjunction with a clutch to synchronously drive three sets of drive components, the synchronization accuracy between each process unit is ensured, and the requirements for the output torque of a single motor are reduced. This avoids the problem of twisting or shaking of the long drive shaft under high-speed operation in the single motor solution, and improves the working reliability and service life of the transmission system. 2. The two servo motors and transmission components offer three optional placement positions, which can be flexibly selected according to the internal space and process layout of the die-cutting machine, improving the adaptability of the equipment design and the flexibility of the layout. 3. The transmission structure using an input wheel, an output wheel, and a conveyor belt has advantages over gear transmission, such as buffering and vibration absorption, low noise, and low maintenance costs. Furthermore, the tension of the conveyor belt can be easily adjusted through the tensioning component to ensure transmission accuracy. 4. The controller adopts a control strategy of first synchronizing under no-load conditions and then engaging the clutch to ensure that the two servo motors have reached speed synchronization before engaging the load. This avoids instantaneous asynchrony and mechanical shock caused by speed differences during load start-up, further improving synchronization accuracy and system stability. 5. The tensioning assembly, through the cooperation of the inclined slide, adjusting screw and locking structure, can achieve precise adjustment and reliable locking of the tensioning wheel position. It has a simple structure, is easy to operate, and effectively ensures the long-term stable operation of the conveyor belt. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 2 This is a partial structural schematic diagram of Embodiment 2 of this utility model; Figure 3 This is a partial structural schematic diagram of Embodiment 3 of this utility model; Figure 4 This is a front view of the tensioning component of this utility model; Figure 5 This is a rear view of the tensioning component of this utility model.

[0012] In the diagram: 1. First drive assembly; 2. Second drive assembly; 3. Third drive assembly; 4. First servo motor; 5. Second servo motor; 6. First transmission assembly; 7. Second transmission assembly; 8. Drive shaft; 9. Clutch; 10. Input shaft; 11. Output shaft; 12. Input wheel; 13. Output wheel; 14. Conveyor belt; 15. Coupling; 16. Tensioning assembly; 17. Tensioning seat; 18. Slider; 19. Tensioning wheel; 20. Adjusting screw; 21. Slide groove; 22. Tensioning elongated hole; 23. Locking screw; 24. Locking pressure plate; 25. Locking nut; 26. Adjusting nut; 27. Reducer; 28. Transition assembly. Detailed Implementation

[0013] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. Example

[0014] like Figure 1 , Figures 4 to 5 The diagram illustrates a multi-unit synchronous drive device for a die-cutting machine, applied to a flatbed die-cutting machine, used to synchronously drive three process units: a hot stamping unit, a holographic unit, and a die-cutting unit. The device includes a first drive assembly 1, a second drive assembly 2, and a third drive assembly 3 arranged side-by-side along the process direction, each corresponding to one of the three process units.

[0015] The device also includes a first servo motor 4, a second servo motor 5, a first transmission assembly 6, and a second transmission assembly 7. Both the first transmission assembly 6 and the second transmission assembly 7 include a drive shaft 8 and a clutch 9 mounted on the drive shaft 8. In this embodiment, the clutch 9 is a pneumatic clutch or an electromagnetic clutch. A reducer 27 is connected to the output end of the first servo motor 4, and the output end of the reducer 27 is connected to the drive shaft 8 of the first transmission assembly 6 via a belt, chain, or gear. Similarly, a reducer 27 is connected to the output end of the second servo motor 5, and the output end of the reducer 27 is also connected to the drive shaft 8 of the second transmission assembly 7 via a belt, chain, or gear. The reducer 27 converts the high-speed, low-torque output of the servo motor into a low-speed, high-torque output, making the selection of servo motors more flexible and reducing motor costs.

[0016] The first drive assembly 1, the second drive assembly 2, and the third drive assembly 3 are each equipped with an input shaft 10 and an output shaft 11. The input shaft 10 is rotatably mounted on the drive assembly, and an input wheel 12 is fixedly mounted on the input shaft 10. The output shaft 11 is rotatably mounted on the drive assembly, with one end extending through the drive assembly to the outside. An output wheel 13 is fixedly mounted on this extended end. The output shaft 11 is used to drive the operation of the corresponding process unit. The input wheel 12 and the output wheel 13 are connected by a conveyor belt 14. The conveyor belt 14 can be a synchronous belt, a V-belt, or a flat belt. In this embodiment, the conveyor belt 14 is a synchronous belt, and the input wheel 12 and the output wheel 13 are synchronous pulleys matched with the synchronous belt to ensure a precise transmission ratio and avoid slippage.

[0017] In this embodiment, the first transmission assembly 6 and the second transmission assembly 7 are arranged in a third configuration, i.e., one transmission assembly is located between adjacent drive assemblies, and the other transmission assembly is located outside the remaining drive assemblies. Specifically, the first transmission assembly 6 is located on the side of the first drive assembly 1 away from the second drive assembly 2, and the second transmission assembly 7 is located between the second drive assembly 2 and the third drive assembly 3. The drive shaft 8 of the first transmission assembly 6 is connected to the input shaft 10 of the first drive assembly 1 via a coupling 15. The second transmission assembly 7 is located between two adjacent sets of drive assemblies. To facilitate the installation of the clutch 9, the output end of the second transmission assembly 7 is also provided with a transition assembly 28. The second transmission assembly 7 is connected to the input shafts 10 of the second drive assembly 2 and the input shafts 10 of the third drive assembly 3 at both ends via the transition assembly 28 and the coupling 15. The input shafts 10 of the first drive assembly 1 and the input shafts 10 of the second drive assembly 2 are connected via the coupling 15.

[0018] Thus, the power of the first servo motor 4 is transmitted to the input shaft 10 of the first drive assembly 1 via the first transmission component 6, and the power of the second servo motor 5 is transmitted to the input shafts 10 of the second drive assembly 2 and the third drive assembly 3 via the second transmission component 7. The input shafts 10 of the three drive assemblies are connected in series by a coupling 15 to achieve synchronous drive of the two servo motors. The clutch 9 is used to control the connection between the corresponding servo motor and the input shaft 10.

[0019] It should be noted that this arrangement also includes another symmetrical arrangement, in which the first transmission component 6 is placed between the first drive component 1 and the second drive component 2, and the second transmission component 7 is placed on the side of the third drive component 3 away from the second drive component 2. The connection method is symmetrical to the above. Those skilled in the art can clearly understand and implement this arrangement based on the above description, so it is not shown in the accompanying drawings.

[0020] Tensioning components 16 are provided on the first drive assembly 1, the second drive assembly 2, and the third drive assembly 3. Each tensioning component 16 includes a tensioning seat 17, a slider 18, a tensioning wheel 19, and an adjusting screw 20. The tensioning seat 17 is fixed to the drive assembly and has an inclined groove 21. Two elongated tensioning holes 22 parallel to the groove's axis are formed within the groove 21. The slider 18 is slidably disposed within the groove 21, and the tensioning wheel 19 is rotatably disposed on the slider 18 via bearings and a rotating shaft, abutting against the conveyor belt 14. The adjusting screw 20 is rotatably connected to the tensioning seat 17. Specifically, a guide block is fixedly provided on the tensioning seat 17, and the adjusting screw 20 passes through the guide block and can rotate relative to it. One end of the adjusting screw 20 is threaded to the slider 18, and a locking nut 25 is screwed onto the end of the adjusting screw 20 and abuts against the slider 18; an adjusting nut 26 is threaded onto the side of the adjusting screw 20 away from the slider 18, and the adjusting nut abuts against the guide block.

[0021] The locking structure includes the aforementioned tensioning elongated hole 22, two locking screws 23 disposed on the slider 18, and a locking pressure plate 24 threadedly connected to the locking screws 23. The two locking screws 23 extend through the two tensioning elongated holes 22 to the other side of the tensioning seat 17, and the locking pressure plate 24 is sleeved on the locking screws 23. By tightening the locking pressure plate 24, the slider 18 can be fixed at a certain position on the slide groove 21.

[0022] When adjusting the tension of conveyor belt 14, first loosen the locking plate 24, then rotate the adjusting nut 26. The adjusting nut 26 abuts against the guide block, causing the adjusting screw 20 to move axially, thereby pulling the slider 18 to slide along the slide groove 21, thus changing the position of the tensioning wheel 19 and adjusting the tension of conveyor belt 14. After adjustment, tighten the locking nut 25 to lock the relative position of the adjusting screw 20 and the slider 18, and then tighten the locking plate 24 to press and fix the slider 18 onto the tensioning seat 17. The inclined slide groove 21 allows the tensioning wheel 19 to move both along the direction of conveyor belt 14 and perpendicular to the direction of conveyor belt 14 during adjustment, which can more effectively adjust the tension of conveyor belt 14.

[0023] The device also includes a controller (not shown in the figure). The controller is electrically connected to the first servo motor 4, the second servo motor 5, the clutch 9 in the first transmission assembly 6, and the clutch 9 in the second transmission assembly 7. The controller can be a PLC controller or a motion controller. The controller is configured to execute the following control strategy: When the device starts, the controller first controls both clutches 9 to be in the disengaged state, and then simultaneously sends start commands to the first servo motor 4 and the second servo motor 5, causing the two servo motors to start under no-load. The controller acquires the speed feedback signals of the two servo motors in real time. When it is determined that both servo motors have reached the preset speed and the speed is synchronized, the controller simultaneously sends engagement commands to the two clutches 9, controlling the two clutches 9 to engage simultaneously, and synchronously transmitting power to the input shaft 10 of each drive assembly, thereby driving each process unit to operate synchronously.

[0024] This control strategy avoids instantaneous asynchrony and mechanical shock caused by the difference in speed between the two motors during load start-up, effectively protecting the transmission system and improving synchronization accuracy. Example

[0025] like Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the first transmission component 6 and the second transmission component 7 are arranged in a second manner, that is, the two transmission components are respectively arranged outside the first drive component 1 and the third drive component 3.

[0026] Specifically, the first transmission assembly 6 is located on the side of the first drive assembly 1 away from the second drive assembly 2, and the second transmission assembly 7 is located on the side of the third drive assembly 3 away from the second drive assembly 2. The drive shaft 8 of the first transmission assembly 6 is connected to the input shaft 10 of the first drive assembly 1 via a coupling 15; the drive shaft 8 of the second transmission assembly 7 is connected to the input shaft 10 of the third drive assembly 3 via a coupling 15. The input shafts 10 of the first drive assembly 1, the second drive assembly 2, and the third drive assembly 3 are connected in series via couplings 15.

[0027] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described again here. Example

[0028] like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the first transmission component 6 and the second transmission component 7 adopt the first arrangement position, that is, the two transmission components are respectively arranged between adjacent drive components.

[0029] Specifically, the first transmission assembly 6 is disposed between the first drive assembly 1 and the second drive assembly 2, and the second transmission assembly 7 is disposed between the second drive assembly 2 and the third drive assembly 3. Both the first transmission assembly 6 and the second transmission assembly 7 are disposed between two adjacent sets of drive assemblies. To facilitate the installation of the clutch 9, both the output ends of the first transmission assembly 6 and the second transmission assembly 7 are provided with transition assemblies 28. The first transmission assembly 6 is connected to the input shafts 10 of the first drive assembly 1 and the second drive assembly 2 at both ends via the transition assemblies 28 and a coupling 15. Similarly, the second transmission assembly 7 is connected to the input shafts 10 of the second drive assembly 2 and the third drive assembly 3 at both ends via the transition assemblies 28 and a coupling 15. The input shaft 10 of the second drive assembly 2 simultaneously receives power from both sides, achieving synchronous drive of the two servo motors.

[0030] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0031] It should be understood that although the above embodiments are described using three drive components as an example, this invention is also applicable to situations with only two drive components. For example, when only two drive components are provided, the following arrangement can be adopted: The first transmission component is located outside the first drive component, and the second transmission component is located outside the second drive component. The input shafts of the two are connected in series via a coupling. Alternatively, one transmission component can be positioned between the two drive components, and the other can be positioned on either side, with the two components connected by a coupling to form a synchronous transmission chain.

[0032] Therefore, this utility model is not limited to three drive components. Its core lies in using dual servo motors + clutch + flexibly arranged transmission components to achieve synchronous drive of multiple units. The number of drive components can be two or more, all of which fall within the protection scope of this utility model.

Claims

1. A multi-unit synchronous drive device for a die-cutting machine, comprising multiple drive components arranged side-by-side along the process direction, characterized in that: Also includes: First servo motor and second servo motor; A first transmission assembly and a second transmission assembly, each of which includes a transmission shaft and a clutch disposed on the transmission shaft; Each of the aforementioned drive components is provided with an input shaft and an output shaft. The input shaft is provided with an input wheel, and the output shaft is provided with an output wheel. The input wheel and the output wheel are connected by a conveyor belt. The first transmission assembly and the second transmission assembly are optionally arranged in the following positions: Two transmission components are respectively set between adjacent drive components. At this time, the two ends of the transmission shaft of each transmission component are connected to the input shaft of the two drive components through couplings. Alternatively, the two transmission components are respectively located outside the two outermost drive components. In this case, the transmission shaft of each transmission component is connected to the input shaft of its adjacent drive component through a coupling, and the input shafts of all drive components are connected in series through couplings. Alternatively, one transmission component is located between adjacent drive components, and another transmission component is located outside the remaining drive components. In this case, the two ends of the transmission shaft of the transmission component located between adjacent drive components are connected to the input shafts of the two drive components on both sides through couplings. The transmission shaft of the transmission component located on the outside is connected to the input shaft of the drive component next to it through a coupling, and the input shaft of the middle drive component is connected to the input shaft of the adjacent drive component through a coupling. The first servo motor drives the corresponding input shaft through the first transmission component, the second servo motor drives the corresponding input shaft through the second transmission component, and the clutch is used to control the on / off connection of the transmission connection between the servo motor and the corresponding input shaft. The number of driving components is no less than two.

2. The multi-unit synchronous drive device for die-cutting machines according to claim 1, characterized in that: Each drive assembly is equipped with a tensioning component, which includes a tensioning seat, a slider slidably disposed on the tensioning seat, a tensioning wheel rotatably disposed on the slider, and an adjusting screw for driving the slider to slide. The tensioning wheel abuts against the conveyor belt, and the tensioning seat is provided with a locking structure for locking the slider in the adjusting position.

3. The multi-unit synchronous drive device for die-cutting machines according to claim 2, characterized in that: The tensioning seat is provided with an inclined slide groove, and the slider is slidably disposed in the slide groove. The adjusting screw is rotatably connected to the tensioning seat and one end is threadedly connected to the slider. The locking structure includes a tensioning elongated hole opened in the slide groove, a locking screw disposed on the slider, and a locking pressure plate threadedly connected to the locking screw. The locking screw passes through the tensioning elongated hole, and the slider is fixed to the slide groove by tightening the locking pressure plate.

4. The multi-unit synchronous drive device for die-cutting machines according to claim 1, characterized in that: It also includes a controller, which is electrically connected to the first servo motor, the second servo motor and the two clutches. The controller is configured to: first control the first servo motor and the second servo motor to start under no-load and achieve speed synchronization during startup, and then control the two clutches to engage simultaneously to transmit power synchronously to each drive component.

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