Tow device for a multi-channel bag making apparatus

Abstract

The utility model discloses a kind of traction devices of multi-channel bag making equipment, including a pair of traction components arranged side by side on rack.Each traction component includes traction drive component, and traction roller is drivingly connected with traction drive component, wherein, the axial direction of traction roller is parallel with the width direction of rack.And, the traction roller of a pair of traction components is coaxially joined in one side end portion adjacent to each other, and the other side end portion is drivingly connected with corresponding traction drive component.The traction device of this pair of traction components respectively pulls the base material in the channel of a pair of bag making equipment, even when one channel (and corresponding traction component or forming device) fails and needs to be maintained, the driving force of the traction component can be cut off alone, the other traction component can still be normally operated under the driving of its driving component, ensure that packaging bag production can still be made, greatly reduce the overall shutdown probability of bag making equipment, ensure the continuity of packaging bag production.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag processing technology, and in particular to a traction device for a multi-channel bag making equipment. Background Technology

[0002] Due to their high practicality and portability, packaging bags are widely used in various fields, including retail, gift packaging, and business activities. They have become an indispensable tool in modern society. Specifically, in the retail industry, packaging bags are an essential shopping aid; in the gift packaging sector, exquisite packaging bags can enhance the perceived value and prestige of gifts; and in business activities, customized packaging bags have become an important means for companies to promote their brand image.

[0003] Therefore, in order to meet the huge market demand, improving the production efficiency of packaging bags has become a key focus for packaging bag manufacturers. In existing technologies, to improve the production efficiency of packaging bags, bag-making equipment can simplify the forming process of the substrate, shortening the processing time for a single bag; and it can also be equipped with multiple parallel channels, allowing the substrate to be cut and fed into multiple channels simultaneously for forming, thereby producing more packaging bags.

[0004] When a bag-making machine has multiple channels, the substrates in each channel usually share a traction device because the forming process is the same. However, if one of the channels or the forming device it passes through malfunctions, especially when maintenance is required, the substrates in other channels cannot be tractioned and transported, causing the entire bag-making machine to stop and seriously affecting the production of packaging bags. Utility Model Content

[0005] The purpose of this invention is to solve the technical problem in existing multi-channel bag making equipment where, when one of the channels or the forming device it passes through malfunctions, especially when maintenance is required, the substrate in other channels cannot be pulled and transported, causing the entire bag making equipment to stop and seriously affecting the production of packaging bags.

[0006] To solve the above-mentioned technical problems, the present invention discloses a traction device for a multi-channel bag making equipment, including a pair of traction components arranged side by side on the frame.

[0007] Each traction assembly includes a traction drive component and a traction roller that is driveably connected to the traction drive component, wherein the axial direction of the traction roller is parallel to the width direction of the frame. Furthermore, the traction rollers of a pair of traction assemblies are coaxially engaged at one side of each other, and the other side of each traction roller is driveably connected to the corresponding traction drive component.

[0008] Using the above technical solution, this traction device includes a pair of traction components arranged side by side, which respectively traction the substrate in a pair of channels of the bag making equipment. Even if one of the channels (and the corresponding traction component or forming device) fails and needs to be shut down for maintenance, the driving force of the traction component can be cut off separately, while the other traction component can still operate normally under the drive of its own driving component, ensuring that the production of packaging bags can still be carried out, greatly reducing the overall downtime probability of the bag making equipment and ensuring the continuity of packaging bag production.

[0009] Furthermore, when both channels are operating normally, the coaxially connected pair of traction rollers can maintain the same rotational speed and conveying speed under the synchronous control of their respective drive components. This ensures consistent substrate traction rates in different channels, avoiding molding process deviations (such as heat-sealing position offsets, cutting size errors, etc.) caused by differences in substrate conveying speed, and guaranteeing the uniformity of packaging bag product quality in multi-channel production. Similarly, when a deviation occurs in the transport of substrate in one channel, only the driving force of the corresponding traction drive component on the traction roller needs to be adjusted to correct the transport of substrate in that channel, without affecting the transport of substrate in the corresponding channel of the other traction component.

[0010] In addition, the traction device can flexibly adjust its working mode according to production needs: it can operate with two channels simultaneously to increase the capacity of the bag making equipment, or it can operate with a single channel independently to adapt to the production needs of small batches and customized packaging bags, thus enhancing the adaptability of the multi-channel bag making equipment to different production scenarios.

[0011] The present invention also discloses a traction device for a multi-channel bag making equipment, wherein the traction roller of each traction component includes a drive shaft and a sleeve fixed to the outer periphery of the drive shaft.

[0012] In this configuration, the ends of a pair of drive shafts are coaxially joined on one side, and the other end is connected to the corresponding traction drive component. Furthermore, the ends of a pair of sleeves are coaxially joined on one side, and the radial dimensions of the outer peripheral walls of the two sleeves are the same.

[0013] Using the above technical solution, each traction roller includes a drive shaft and a sleeve fixed to the outer periphery of the drive shaft. The adjacent ends of a pair of drive shafts are coaxially engaged, while the sleeves are independently coaxially connected. The drive shafts mainly transmit the driving torque, while the sleeves only bear the frictional traction effect with the substrate. Furthermore, the radial dimensions of the outer peripheral walls of a pair of sleeves are the same. When the dual channels operate synchronously, the contact linear velocity between the substrate and the sleeves is exactly the same, avoiding uneven substrate conveying speed caused by differences in the working surface diameter of the traction rollers. This prevents the substrate from being stretched, wrinkled, or shifted during traction, ensuring the synchronicity of substrate transportation in multiple channels and ultimately improving the accuracy of the packaging bag forming process in each channel (such as the consistency of heat sealing position and cutting size).

[0014] Meanwhile, the coaxial design of the sleeves allows the working surfaces of the two traction rollers to form a continuous and flat contact surface in the axial direction. When the substrate passes through, it will not be stuck or scratched due to the steps or gaps at the sleeve joints, reducing the risk of substrate damage and ensuring the smoothness of the traction process.

[0015] Furthermore, as a consumable part that comes into direct contact with the substrate (long-term friction may cause surface wear and a decrease in anti-slip performance), the sleeve can be disassembled and replaced separately. This is especially important when adapting to substrates of different thicknesses and materials; in such cases, only the sleeve with matching surface characteristics (e.g., anti-slip texture, hardness) or dimensions needs to be replaced, without replacing the entire traction roller. Compared to replacing the entire traction roller, replacing only the sleeve is less costly and simpler, reducing equipment maintenance time and economic costs.

[0016] The present invention also discloses a traction device for a multi-channel bag making equipment, wherein the ends of a pair of drive shafts adjacent to each other are coaxially joined together by a connecting part.

[0017] The connecting part includes a connecting recess at one end of a drive shaft and a connecting protrusion at the other end of a drive shaft. The connecting protrusion is rotatably fitted into the connecting recess about the axial direction of the traction roller.

[0018] By adopting the above technical solution, the connecting protrusion can be rotatably fitted into the connecting recess around the traction roller axis, which restricts the axial and radial relative positions of the two drive shafts, avoids eccentricity, tilting or shaking of a pair of drive shafts during operation, and prevents problems such as uneven substrate traction speed and packaging bag forming size deviation caused by the displacement of the drive shaft position, thereby further improving the processing accuracy of multi-channel bag making.

[0019] The present invention also discloses a traction device for a multi-channel bag making equipment, wherein the connecting protrusion is configured as a columnar protrusion extending along the axial direction of the traction roller, and a connecting bearing is sleeved on the outer peripheral wall of the columnar protrusion.

[0020] Furthermore, the connecting recess is configured as a circular blind hole that fits the outer peripheral surface of the connecting bearing; wherein, the connecting protrusion is fitted inside the connecting recess, and the inner wall surface of the circular blind hole is tightly engaged with the outer peripheral surface of the connecting bearing.

[0021] By adopting the above technical solution, the connecting protrusion is set as a columnar boss and fitted with a connecting bearing, and the connecting recess is adapted to be a circular blind hole that fits against the outer circumferential surface of the bearing, thus transforming the sliding friction between a pair of drive shafts into rolling friction. The resistance of rolling friction is much smaller than that of sliding friction, which can significantly reduce the mechanical wear when the two drive shafts rotate independently. On the one hand, this makes the power output of the traction drive component more efficient; on the other hand, it also avoids the jamming and sticking phenomena caused by sliding friction, ensuring that even when operating independently in a single channel, the working drive shaft can maintain smooth and stable operation.

[0022] The present invention also discloses a traction device for a multi-channel bag making equipment, wherein the ends of a pair of sleeves adjacent to each other are coaxially connected, and the connection points are aligned with the connection points of the ends of a pair of drive shafts adjacent to each other in the axial direction of the traction roller.

[0023] Alternatively, the ends of a pair of sleeves are coaxially connected on one side, and the connection point is offset from the connection point of the ends of a pair of drive shafts on one side in the axial direction of the traction roller.

[0024] By adopting the above technical solution, when the joint of a pair of sleeves and the joint of a pair of drive shafts are aligned in the axial direction of the traction roller, only one of the joint positions needs to be used as the reference position during assembly. There is no need to position and adjust the two joints separately, which greatly reduces the complexity of assembly, improves assembly efficiency, and facilitates position verification during later maintenance.

[0025] When the joint of a pair of sleeves and the joint of a pair of drive shafts are offset axially from each other on the traction roller, if the joint of a pair of drive shafts has slight radial protrusions due to bearings, protrusions and recesses, etc., and if the pair of drive shafts may experience significant radial vibration at the joint during operation, the axially offset layout allows the joint of a pair of sleeves to avoid the vibration area. This enables the contact working surface of each sleeve to transport the substrate more smoothly, preventing the substrate from scratching or jamming with the drive shaft joint structure during traction. It is especially suitable for traction and conveying thin and easily damaged substrates (such as plastic film and kraft paper), reducing the risk of substrate damage.

[0026] The present invention also discloses a traction device for a multi-channel bag making equipment. A fastener is provided between the end of the sleeve of each traction roller that is close to the corresponding traction drive component and the corresponding position of the internal transmission shaft, and a support member is rotatably provided between the end that is away from the corresponding traction drive component and the corresponding position of the internal transmission shaft.

[0027] Using the above technical solution, the end of each sleeve closest to the traction drive component is fixedly connected to the drive shaft via fasteners. This allows the torque of the drive shaft to be directly transmitted to the sleeve, preventing slippage due to relative rotation between the sleeve and the drive shaft. This ensures that the power of the traction drive component is accurately converted into the traction speed of the sleeve, guaranteeing the stability of the substrate conveying speed and preventing problems such as substrate conveying delays and packaging bag forming process disruptions (e.g., misalignment of heat sealing and cutting processes) caused by sleeve slippage. Simultaneously, the end of each sleeve furthest from the traction drive component is rotatably connected to the drive shaft via a support member. During the traction of the substrate, when the sleeve is subjected to radial pressure from the substrate, the support member effectively distributes the load, preventing the sleeve from swaying or radially shifting relative to the drive shaft, further improving the stability of the sleeve in traction of the substrate.

[0028] The present invention also discloses a traction device for a multi-channel bag making equipment, wherein the fastener is configured as an expansion sleeve between the inner wall surface of the sleeve and the corresponding outer wall surface of the internal drive shaft, and the support is configured as a support bearing between the inner wall surface of the sleeve and the corresponding outer wall surface of the internal drive shaft.

[0029] Using the above technical solution, the expansion sleeve undergoes radial deformation by tightening the bolts, thereby forming a gapless interference fit between the inner wall of the sleeve and the outer wall of the drive shaft. This achieves a secure connection between the drive shaft and the corresponding sleeve, reducing the risk of relative slippage between them and ensuring the accuracy of substrate delivery. This is particularly suitable for the power transmission requirements in high-speed bag-making production scenarios. Furthermore, the expansion sleeve is a detachable mechanical connector. Installation only requires tightening the matching bolts, and disassembly releases the interference fit by loosening the bolts. No welding or cutting is required on the mating surfaces of the sleeve or drive shaft, and no scratches or damage are caused. Compared to traditional fixing methods such as key connections and welding, this significantly simplifies the sleeve assembly and disassembly process and improves maintenance efficiency.

[0030] The support bearing supports the end of the sleeve furthest from the traction drive component, thereby limiting the radial offset of the sleeve and providing stable radial support. During substrate traction, even if the sleeve is subjected to uneven radial pressure, the support bearing keeps the sleeve's axis of rotation aligned with the drive shaft, preventing the sleeve from wobbling and ensuring uniform contact between the outer circumference of the sleeve and the substrate, thus avoiding wrinkles or damage to the substrate due to uneven traction force.

[0031] Furthermore, when the joint of a pair of sleeves is offset from the joint of a pair of drive shafts in the axial direction of the traction roller, and the end of one sleeve away from the traction drive component is fitted onto the outer circumference of the drive shaft of the other traction roller, the sleeve may rotate relative to the other drive shaft during operation. The support bearing can convert the sliding friction between the sleeve and the drive shaft into rolling friction, reduce the wear between the two, and avoid the jamming phenomenon caused by sliding friction, thereby further improving the stability of the sleeve traction substrate.

[0032] The present invention also discloses a traction device for a multi-channel bag making equipment. Each traction drive component includes a drive motor located on the side of the corresponding traction roller away from the other traction roller in the width direction of the frame. A transmission belt is provided between the output end of the drive motor and the corresponding end of the corresponding transmission shaft.

[0033] By adopting the above technical solution, the traction drive motor is set on the side of the corresponding traction roller away from the other traction roller, so as to avoid the installation positions of the two drive motors overlapping and interfering with each other in the width direction of the frame, and to make reasonable use of the redundant space on the frame.

[0034] Furthermore, the drive motor and the corresponding drive shaft transmit power through a drive belt. The flexibility of the belt can effectively buffer the torque impact generated when the drive motor starts, stops, or adjusts its speed. Compared with rigid transmission methods such as gears and couplings, this flexible transmission can reduce the impact of torque fluctuations on the drive shaft and avoid problems such as loosening of the drive shaft joint and accelerated wear of the sleeve caused by rigid impact.

[0035] The present invention also discloses a traction device for a multi-channel bag making equipment. The traction device further includes a pair of pressing components disposed on the frame, and the width direction of the frame corresponds to a pair of traction components.

[0036] Each clamping assembly includes a clamping drive component and a clamping part that is connected to the clamping drive component. The clamping part is spaced apart from the corresponding traction roller. The clamping drive component moves in conjunction with the clamping part toward the outer wall surface of the corresponding traction roller to clamp the substrate on the outer wall surface of the corresponding traction roller.

[0037] By adopting the above technical solution, a pair of clamping members corresponding to a pair of traction components are set up so that the clamping drive component drives the clamping part to act on the substrate, thereby pressing the substrate against the outer peripheral surface of the traction roller, increasing the positive pressure between the substrate and the traction roller, and greatly improving the friction between the two. This avoids slippage caused by the substrate surface being smooth (such as plastic film), being too thin, or having too fast traction speed, and ensures that the rotation speed of the traction roller can be accurately converted into the conveying speed of the substrate, preventing the substrate from being conveyed late, deviating, or wrinkled, and ensuring the synchronicity and stability of substrate conveying in each channel in the multi-channel system.

[0038] The present invention also discloses a traction device for a multi-channel bag making equipment. Each pressing component includes a pressing drive cylinder and a pressing part including a pressing wheel. The pressing wheel is mounted on a mounting seat rotatably connected to the frame. The output end of the pressing drive cylinder is fixedly connected to the mounting seat. The pressing drive cylinder is linked to the mounting seat to swing, causing the pressing wheel to move toward the outer wall of the corresponding traction roller.

[0039] Using the above technical solution, during the traction of the substrate, the clamping drive cylinder drives the mounting base to swing, causing the outer circumference of the clamping wheel to press against the substrate on the outer wall of the corresponding traction roller. This ensures that the traction force on the traction roller can be transmitted to the substrate. Simultaneously, the clamping wheel rotates during traction, converting the sliding friction between the clamping assembly and the substrate into rolling friction. The contact resistance of rolling friction is much lower than that of sliding friction, effectively reducing scratches and wear on the substrate surface, making it particularly suitable for packaging substrates with printed patterns that are easily scratched.

[0040] The beneficial effects of this utility model are as follows:

[0041] This utility model discloses a traction device for a multi-channel bag-making equipment, including a pair of traction components arranged side-by-side on a frame. Each traction component includes a traction drive component and a traction roller driven by the traction drive component, wherein the axial direction of the traction roller is parallel to the width direction of the frame. Furthermore, the traction rollers of the pair of traction components are coaxially engaged on one side and driven by the other side of the rollers. This traction device allows the pair of traction components to pull the substrate in a pair of channels of the bag-making equipment. Even if one channel (and its corresponding traction component or forming device) malfunctions and requires maintenance, the driving force of that traction component can be cut off independently, while the other traction component continues to operate normally under the drive of its own drive component, ensuring that bag production can still be carried out. This significantly reduces the overall downtime probability of the bag-making equipment and ensures the continuity of bag production.

[0042] In addition, the traction device can flexibly adjust its working mode according to production needs: it can operate with two channels simultaneously to increase the capacity of the bag making equipment, or it can operate with a single channel independently to adapt to the production needs of small batches and customized packaging bags, thus enhancing the adaptability of the multi-channel bag making equipment to different production scenarios. Attached Figure Description

[0043] Figure 1 A three-dimensional structural schematic diagram of the traction device (removing a pair of sleeves) of the multi-channel bag making equipment provided in the embodiment of this utility model;

[0044] Figure 2 A cross-sectional schematic diagram of a traction component of a traction device for a multi-channel bag-making equipment provided in an embodiment of this utility model;

[0045] Figure 3 A cross-sectional schematic diagram of another traction component of the traction device for the multi-channel bag making equipment provided in this embodiment of the utility model;

[0046] Figure 4 A three-dimensional structural diagram of the sleeve of the traction device of the multi-channel bag making equipment provided in the embodiments of this utility model;

[0047] Figure 5 An exploded structural diagram of a pair of drive shafts of the traction device of the multi-channel bag making equipment provided in this embodiment of the utility model;

[0048] Figure 6 A schematic diagram of the pressing component and the traction component of the traction device of the multi-channel bag making equipment provided in this embodiment of the utility model.

[0049] Explanation of reference numerals in the attached figures:

[0050] 100. Traction drive components; 110. Drive motor; 111. Drive belt; 112. Drive pulley;

[0051] 200. Traction roller; 201. Connecting part; 202. Connecting protrusion; 203. Connecting recess; 204. Columnar boss; 205. Connecting bearing; 206. Circular blind hole;

[0052] 210. Drive shaft; 220. Sleeve;

[0053] 230. Fastener; 231. Expansion sleeve; 240. Support component; 241. Support bearing;

[0054] 300. Clamping assembly;

[0055] 310. Clamping drive component; 311. Clamping drive cylinder; 320. Clamping part; 321. Clamping wheel; 330. Mounting base;

[0056] 20. Rack;

[0057] X, the width direction of the rack. Detailed Implementation

[0058] As mentioned in the background section, in the existing multi-channel bag making equipment, when one of the channels or the forming device it passes through malfunctions, especially when maintenance is required, the substrate in other channels cannot be pulled and transported, causing the entire bag making equipment to stop and seriously affecting the production of packaging bags.

[0059] To address this, the present invention provides a traction device for a multi-channel bag-making equipment. Taking a dual-channel setup as an example, this traction device includes a pair of traction components arranged side-by-side on the frame, which respectively traction the substrate in a pair of channels of the bag-making equipment. Even if one channel (and its corresponding traction component or forming device) malfunctions and requires shutdown for maintenance, the driving force of that traction component can be cut off individually, while the other traction component can still operate normally under the drive of its own driving component, ensuring that packaging bags can still be made. This significantly reduces the overall downtime probability of the bag-making equipment and ensures the continuity of packaging bag production.

[0060] Specifically, each traction assembly includes a traction drive component and a traction roller that is driven by the traction drive component. Furthermore, the traction rollers of a pair of traction assemblies are coaxially engaged on one side and driven by the other side of their respective traction drive components. The coaxially engaged pair of traction rollers can maintain the same rotational speed and conveying speed under the synchronous control of their respective drive components, ensuring that the substrate traction rate is consistent in different channels.

[0061] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0062] This embodiment provides a traction device for a multi-channel bag making machine. As the name suggests, the multi-channel bag making machine has multiple channels, which are usually arranged side by side along the width of the frame. The initial substrate needs to be cut into parts corresponding to the multiple channels, and then transported to each channel respectively. Subsequently, the forming process is completed in the channel to form a packaging bag. Regarding the forming process of the substrate in the channel, those skilled in the art can design it according to the actual situation and specific needs. This embodiment does not limit it to a single one.

[0063] To facilitate understanding, the following explanation uses a bag-making machine with parallel dual channels as an example to illustrate this traction device.

[0064] Specifically, such as Figures 1 to 3 As shown, this traction device includes a pair of traction assemblies arranged side-by-side on a frame 20. Each traction assembly includes a traction drive component 100 and a traction roller 200 (see [reference needed]) that is driveably connected to the traction drive component 100. Figure 2 and Figure 3 In this configuration, the axial direction of the traction roller 200 is parallel to the width direction X of the frame 20. Furthermore, the traction rollers 200 of a pair of traction components are coaxially engaged on one side and connected to the corresponding traction drive component 100 on the other side. When both channels are operating normally, the coaxially engaged pair of traction rollers 200 can maintain the same rotational speed and conveying speed under the synchronous control of their respective drive components. This ensures consistent substrate traction rates in different channels, avoiding molding process deviations (such as heat-sealing position offsets, cutting size errors, etc.) caused by differences in substrate conveying speed, and guaranteeing the uniformity of packaging bag product quality in multi-channel production. Similarly, when a deviation occurs in the transport of substrate in one channel, only the driving force of the corresponding traction drive component 100 on the traction roller 200 needs to be adjusted to correct the transport of substrate in that channel, while the other traction component continues to normally traction the substrate in the corresponding channel.

[0065] Furthermore, the traction device can flexibly adjust its working mode according to production needs: it can operate with both channels simultaneously to increase the capacity of the bag-making equipment, or it can operate with a single channel independently to adapt to the production needs of small batches and customized packaging bags, thus enhancing the adaptability of the multi-channel bag-making equipment to different production scenarios.

[0066] Of course, if the bag making equipment includes three channels, the two adjacent parallel channels can use the above-mentioned traction device, while the other separate channel is independently equipped with a corresponding traction component; if the bag making equipment includes four channels, the four channels are divided into two groups of channels, each group of channels includes two adjacent parallel channels, and each group of channels is equipped with the above-mentioned traction device.

[0067] Furthermore, in this embodiment, the traction roller 200 of each traction assembly includes a drive shaft 210 and a sleeve 220 fixed to the outer periphery of the drive shaft 210.

[0068] In this configuration, the two drive shafts 210 are coaxially joined at one side and connected to the corresponding traction drive component 100 at the other side. Furthermore, the two sleeves 220 are coaxially joined at one side and have the same radial dimension on their outer peripheral walls.

[0069] like Figures 2 to 4 As shown, each traction roller 200 includes a drive shaft 210 and a sleeve 220 fixed to the outer periphery of the drive shaft 210. The adjacent ends of a pair of drive shafts 210 are coaxially engaged, while the sleeves 220 are independently coaxially connected. The drive shafts 210 mainly transmit the driving torque, while the sleeves 220 only bear the frictional traction effect with the substrate. Furthermore, the radial dimensions of the outer peripheral walls of a pair of sleeves 220 are the same. When the dual channels are running synchronously, the contact linear velocity between the substrate and the sleeves 220 is exactly the same, avoiding uneven substrate conveying speed caused by differences in the working surface diameter of the traction rollers 200. This prevents the substrate from being stretched, wrinkled, or shifted during traction, ensuring the synchronicity of substrate transportation in multiple channels and ultimately improving the accuracy of the packaging bag forming process in each channel (such as the consistency of heat sealing position and cutting size).

[0070] Meanwhile, the coaxial connection of the sleeves 220 allows the working surfaces of the two traction rollers 200 to form a continuous and flat contact surface in the axial direction. When the substrate passes through, it will not be stuck or scratched due to the steps or gaps at the connection of the sleeves 220, reducing the risk of substrate damage and ensuring the stability of the traction process.

[0071] In addition, such as Figure 4 As shown, sleeve 220, being a vulnerable part that directly contacts the substrate (long-term friction may lead to surface wear and decreased anti-slip performance), can be disassembled and replaced separately. This is especially important when adapting to substrates of different thicknesses and materials; only sleeve 220 with matching surface characteristics (such as anti-slip texture and hardness) or dimensions needs to be replaced, without replacing the entire traction roller 200. Compared to replacing the entire traction roller 200, replacing only sleeve 220 is less costly and simpler, reducing equipment maintenance time and economic costs.

[0072] Furthermore, such as Figure 1As shown, each traction drive component 100 includes a drive motor 110 located on the side of the corresponding traction roller 200 away from the other traction roller 200 in the width direction X of the frame 20. A transmission belt 111 is provided between the output end of the drive motor 110 and the corresponding end of the corresponding transmission shaft 210. It should be noted that both the output end of the drive motor 110 and the corresponding end of the corresponding transmission shaft 210 are provided with transmission pulleys 112, and the output end of the drive motor 110 and the corresponding end of the corresponding transmission shaft 210 cooperate with the transmission belt 111 through the transmission pulleys 112.

[0073] In this embodiment, the traction drive motor 110 is positioned on the side of the corresponding traction roller 200 away from the other traction roller 200, so as to avoid the installation positions of the two drive motors 110 overlapping and interfering with each other in the width direction X of the frame 20, and to make reasonable use of the redundant space on the frame 20.

[0074] Furthermore, the drive motor 110 and the corresponding transmission shaft 210 transmit power through the transmission belt 111. The flexibility of the belt can effectively buffer the torque impact generated when the drive motor 110 starts, stops, or adjusts its speed. Compared with rigid transmission methods such as gears and couplings, this flexible transmission can reduce the impact of torque fluctuations on the transmission shaft 210 and avoid problems such as loosening of the joint of the transmission shaft 210 and accelerated wear of the sleeve 220 caused by rigid impact.

[0075] Of course, the drive motor 110 and the corresponding transmission shaft 210 can also be connected by a gear set or a coupling, and this embodiment does not limit this to only one.

[0076] The following is a detailed description of the engagement structure of the adjacent ends of a pair of drive shafts 210.

[0077] In this embodiment, as Figure 5 As shown, the ends of a pair of drive shafts 210 adjacent to each other are connected by a connecting part 201 (see...). Figure 3 They are coaxially joined together.

[0078] Specifically, the connecting part 201 includes a connecting protrusion 202 disposed at one end of a drive shaft 210 and a connecting recess 203 disposed at the other end of a drive shaft 210. The connecting protrusion 202 is rotatably fitted into the connecting recess 203 about the axial direction of the traction roller 200.

[0079] In this embodiment, the connecting protrusion 202 is rotatably fitted into the connecting recess 203 around the traction roller 200, which restricts the axial and radial relative positions of the two drive shafts 210, avoids eccentricity, tilting or shaking of the pair of drive shafts 210 during operation, and prevents problems such as uneven substrate traction speed and packaging bag forming size deviation caused by the displacement of the drive shaft 210 position, further improving the processing accuracy of multi-channel bag making.

[0080] More specifically, such as Figure 5 As shown, the connecting protrusion 202 is configured as a columnar protrusion 204 extending along the axial direction of the traction roller 200, and a connecting bearing 205 is sleeved on the outer peripheral wall of the columnar protrusion 204. The number of connecting bearings 205 can be one, two, three or other numbers arranged sequentially along the axial direction of the columnar protrusion 204. This embodiment does not limit this to a single number.

[0081] Furthermore, the connecting recess 203 is adapted to a circular blind hole 206 that fits against the outer peripheral surface of the connecting bearing 205; wherein, the connecting protrusion 202 is sleeved within the connecting recess 203, and the inner wall surface of the circular blind hole 206 is tightly engaged with the outer peripheral surface of the connecting bearing 205, so that the sliding friction between the pair of drive shafts 210 is transformed into rolling friction. The resistance of rolling friction is much smaller than that of sliding friction, which can significantly reduce the mechanical wear when the two drive shafts 210 rotate independently. On the one hand, it makes the power output of the traction drive component 100 more efficient; on the other hand, it also avoids the jamming and sticking phenomena caused by sliding friction, ensuring that even when operating independently in a single channel, the working drive shaft 210 can maintain smooth and stable operation.

[0082] Of course, in another embodiment, the connecting protrusion 202 is configured as a truncated cone extending along the axial direction of the traction roller 200 and with a gradually decreasing diameter, while the connecting recess 203 is configured as a conical recess that fits the outer circumferential surface of the truncated cone. The truncated cone is embedded in the conical recess. This connecting part 201 does not require bearings and can withstand a large axial loading force, ensuring the assembly stability of a pair of drive shafts 210 and meeting the stability requirements of a pair of drive shafts 210 under high-speed rotation, making it suitable for high-speed bag making equipment.

[0083] Therefore, this embodiment does not limit the engagement structure of the adjacent ends of a pair of drive shafts 210 to a single design, and those skilled in the art can design it according to actual conditions and specific needs.

[0084] The drive shaft 210 and sleeve 220 of each traction roller 200 are described in detail below.

[0085] In this embodiment, as Figure 2 , Figure 3 as well as Figure 5As shown, a fastener 230 is provided between the end of the sleeve 220 of each traction roller 200 near the corresponding traction drive component 100 and the corresponding position of the internal drive shaft 210. The fastener 230 is used to connect the sleeve 220 and the corresponding drive shaft 210. A support member 240 is rotatably provided between the end of the sleeve 220 away from the corresponding traction drive component 100 and the corresponding position of the internal drive shaft 210.

[0086] Each sleeve 220 is fixedly connected to the drive shaft 210 at one end near the traction drive component 100 via fasteners 230. This allows the torque of the drive shaft 210 to be directly transmitted to the sleeve 220, preventing slippage due to relative rotation between the sleeve 220 and the drive shaft 210. This ensures that the power of the traction drive component 100 is accurately converted into the traction speed of the sleeve 220, guaranteeing the stability of the substrate conveying speed and preventing problems such as substrate conveying delays and packaging bag forming process disruptions (e.g., misalignment of heat sealing and cutting processes) caused by sleeve 220 slippage. Simultaneously, the end of each sleeve 220 furthest from the traction drive component 100 is rotatably connected to the drive shaft 210 via a support member 240. During the traction of the substrate, when the sleeve 220 is subjected to radial pressure from the substrate, the support member 240 effectively shares the load, preventing the sleeve 220 from swaying or radially shifting relative to the drive shaft 210, further improving the stability of the sleeve 220 in traction of the substrate.

[0087] Specifically, the fastener 230 is configured as an expansion sleeve 231 between the inner wall of the sleeve 220 and the corresponding outer wall of the internal drive shaft 210. The expansion sleeve 231 deforms radially by tightening the bolts, creating a gapless interference fit between the inner wall of the sleeve 220 and the outer wall of the drive shaft 210. This achieves a secure connection between the drive shaft 210 and the corresponding sleeve 220, reducing the risk of relative slippage and ensuring accurate substrate delivery. This is particularly suitable for power transmission requirements in high-speed bag-making production scenarios. Furthermore, the expansion sleeve 231 is a detachable mechanical connector. Installation only requires tightening the matching bolts, and disassembly releases the interference fit by loosening the bolts. No welding or cutting is required on the mating surfaces of the sleeve 220 or drive shaft 210, and no scratches or damage are caused. Compared to traditional fixing methods such as key connections and welding, this significantly simplifies the assembly and disassembly process of the sleeve 220 and improves maintenance efficiency. It should be noted that the structure of the fastener 230 is not limited to the expansion sleeve 231 in the above embodiment. It can also be set as a bar key, with keyways provided at the corresponding parts of the drive shaft 210 and the sleeve 220, and the bar key is embedded in the keyway.

[0088] The support member 240 is configured as a support bearing 241 between the inner wall surface of the sleeve 220 and the corresponding outer wall surface of the internal drive shaft 210. The support bearing 241 supports the end of the sleeve 220 away from the traction drive component 100, thereby limiting the radial displacement of the sleeve 220 and providing stable radial support for the sleeve 220. During the substrate traction process, even if the sleeve 220 is subjected to uneven radial pressure, the support bearing 241 can keep the rotation axis of the sleeve 220 aligned with the drive shaft 210, preventing the sleeve 220 from shaking and ensuring uniform contact between the outer circumferential surface of the sleeve 220 and the substrate, avoiding wrinkles or damage to the substrate due to uneven traction force. Of course, the support member 240 can also be configured as a frustum protruding radially outward on the outer circumferential surface of the drive shaft 210, supporting the outer sleeve 220 through the protruding frustum.

[0089] It should be noted that, in one embodiment, such as Figure 2 As shown, the adjacent ends of a pair of sleeves 220 are coaxially connected, and the connection points are aligned with the adjacent ends of a pair of drive shafts 210 in the axial direction of the traction roller 200. During assembly, only one of the connection points needs to be used as the reference position, without the need to position and adjust the two connection points separately. This greatly reduces the complexity of assembly, improves assembly efficiency, and facilitates position verification during later maintenance.

[0090] Of course, in another embodiment, such as Figure 3 As shown, the adjacent ends of a pair of sleeves 220 are coaxially connected, and the connection points of the sleeves 220 and the adjacent ends of a pair of drive shafts 210 are offset axially from each other on the traction roller 200. If the joint of a pair of drive shafts 210 has a small radial protrusion due to bearings, protrusions and recesses, etc., and the pair of drive shafts 210 may experience significant radial vibration at the joint position during operation, the axially offset layout allows the joint of a pair of sleeves 220 to avoid the vibration area. This allows the contact working surface of each sleeve 220 to transport the substrate more smoothly, preventing the substrate from scratching or jamming with the joint structure of the drive shaft 210 during traction. This is especially suitable for the traction and transport of thin and easily damaged substrates (such as plastic film and kraft paper), reducing the risk of substrate damage.

[0091] Furthermore, when the contact points of a pair of sleeves 220 and the contact points of a pair of drive shafts 210 are misaligned axially with the traction roller 200, one of the sleeves 220 ( Figure 3 The end of the sleeve 220 on the right side, away from the traction drive component 100, will be sleeved on the drive shaft 210 of another traction roller 200. Figure 3On the outer periphery of the drive shaft 210 on the left side, during operation, the sleeve 220 may rotate relative to another drive shaft 210. The support bearing 241 can convert the sliding friction between the sleeve 220 and the drive shaft 210 into rolling friction, reduce the wear between the two, and avoid the jamming phenomenon caused by sliding friction, further improving the stability of the sleeve 220 traction substrate.

[0092] It should be noted that the traction roller 200 is not limited to the structure of the aforementioned drive shaft 210 and sleeve 220; it can also be configured as an integral structure. Specifically, the traction roller 200 is configured as a cylindrical structure, with one end forming an axially protruding transmission part that is connected to the traction drive component 100. The outer peripheral surface of the cylindrical structure serves as the working surface of the traction substrate. To improve the traction force, the friction of the outer peripheral surface of the cylindrical structure can be increased, or multiple protrusions can be provided on the outer peripheral surface of the cylindrical structure. Therefore, the structure of the traction roller 200 is not uniquely limited in this embodiment.

[0093] Furthermore, in order to provide traction stability of the traction device on the substrate, in this embodiment, such as Figure 1 As shown, the traction device also includes a pair of clamping components 300 disposed on the frame 20, and the width direction X of the frame 20 corresponds to a pair of traction components.

[0094] Among them, such as Figure 6 As shown, each clamping assembly 300 includes a clamping drive component 310 and a clamping part 320 that is pulsatorically connected to the clamping drive component 310. The clamping part 320 is spaced apart from the corresponding traction roller 200. The clamping drive component 310 moves in conjunction with the clamping part 320 toward the outer wall surface of the corresponding traction roller 200 to clamp the substrate on the outer wall surface of the corresponding traction roller 200.

[0095] In this embodiment, by setting a pair of clamping members corresponding to a pair of traction components, the clamping drive component 310 drives the clamping part 320 to act on the substrate, thereby pressing the substrate against the outer peripheral surface of the traction roller 200, increasing the positive pressure between the substrate and the traction roller 200, greatly improving the friction between the two, avoiding slippage caused by a smooth substrate surface (such as plastic film), excessive thickness, or excessive traction speed, ensuring that the rotational speed of the traction roller 200 can be accurately converted into the conveying speed of the substrate, preventing the substrate from experiencing conveying lag, deviation, or wrinkles, and ensuring the synchronicity and stability of substrate conveying in each channel of the multi-channel system.

[0096] Specifically, each clamping assembly 300 includes a clamping drive component 310 with a clamping drive cylinder 311 and a clamping part 320 with a clamping wheel 321. The clamping wheel 321 is mounted on a mounting base 330 rotatably connected to the frame 20. The output end of the clamping drive cylinder 311 is fixedly connected to the mounting base 330. The clamping drive cylinder 311 moves in conjunction with the mounting base 330 to swing, causing the clamping wheel 321 to move toward the outer wall surface of the corresponding traction roller 200.

[0097] During the traction process of the substrate, the clamping drive cylinder 311 drives the mounting base 330 to swing, causing the outer circumference of the clamping roller 321 to press against the substrate on the outer wall of the corresponding traction roller 200. This ensures that the traction force on the traction roller 200 can be transmitted to the substrate. At the same time, the clamping roller 321 rotates during the traction process, converting the sliding friction between the clamping assembly 300 and the substrate into rolling friction. The contact resistance of rolling friction is much smaller than that of sliding friction, which can effectively reduce scratches and wear on the substrate surface, and is especially suitable for packaging substrates with printed patterns that are easily scratched.

[0098] Of course, this embodiment does not limit the specific structure of the pressing assembly 300. For example, in another alternative embodiment, the pressing assembly 300 includes a pressing drive component 310 and a pressing plate disposed at the output end of the pressing drive component 310. The pressing drive component 310 drives the pressing plate toward the outer periphery of the traction roller 200 to press the substrate on the outer wall surface of the corresponding traction roller 200, ensuring that the traction force on the traction roller 200 can be transmitted to the substrate. At the same time, it reduces the vibration of the substrate during transportation and improves the stability of the substrate in subsequent molding processes.

[0099] Therefore, this embodiment does not limit the specific structure of the clamping assembly 300.

[0100] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. In order to provide a deep understanding of this utility model, many specific details are included in the above description, and this utility model may also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0101] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0102] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0103] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0104] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0105] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A traction device for a multi-channel bag-making machine, characterized in that, Includes a pair of traction components mounted side-by-side on the frame; wherein Each of the traction assemblies includes a traction drive component and a traction roller driveably connected to the traction drive component, wherein the axial direction of the traction roller is parallel to the width direction of the frame; and The traction rollers of the pair of traction components are coaxially engaged on one side of each other, and the other side of each roller is connected to the corresponding traction drive component.

2. The traction device of the multi-channel bag-making equipment as described in claim 1, characterized in that, in Each of the traction components includes a traction roller comprising a drive shaft and a sleeve fixed to the outer periphery of the drive shaft; wherein The two drive shafts are coaxially joined at one end and their other ends are connected to the corresponding traction drive component; and The two sleeves are coaxially connected at their adjacent ends, and the radial dimensions of the outer peripheral walls of the two sleeves are the same.

3. The traction device of the multi-channel bag-making equipment as described in claim 2, characterized in that, The two drive shafts are coaxially joined together at their adjacent ends via a connecting part; wherein The connecting portion includes a connecting recess disposed at one end of one of the drive shafts and a connecting protrusion disposed at the other end of the drive shaft. The connecting protrusion is rotatably fitted into the connecting recess about the axial direction of the traction roller.

4. The traction device of the multi-channel bag-making equipment as described in claim 3, characterized in that, The connecting protrusion is configured as a columnar boss extending axially along the traction roller, and a connecting bearing is fitted onto the outer peripheral wall of the columnar boss; and The connecting recess is configured as a circular blind hole adapted to the outer peripheral surface of the connecting bearing; wherein, the connecting protrusion is sleeved in the connecting recess, and the inner wall surface of the circular blind hole is tightly engaged with the outer peripheral surface of the connecting bearing.

5. The traction device of the multi-channel bag-making equipment as described in claim 2, characterized in that, in The two sleeves are coaxially connected at their adjacent ends, and the connection point is aligned with the connection position of the two drive shafts at their adjacent ends in the axial direction of the traction roller. or The two sleeves are coaxially connected at their adjacent ends, and the connection point is offset from the connection point of the two drive shafts at their adjacent ends in the axial direction of the traction roller.

6. The traction device of the multi-channel bag-making equipment as described in claim 5, characterized in that, in Each of the traction rollers has a fastener connecting the sleeve to the corresponding drive shaft between the end of the sleeve near the traction drive component and the corresponding position of the internal drive shaft, and a support member rotatably provided between the end away from the traction drive component and the corresponding position of the internal drive shaft.

7. The traction device of the multi-channel bag-making equipment as described in claim 6, characterized in that, in The fastener is configured as an expansion sleeve between the inner wall surface of the sleeve and the corresponding outer wall surface of the internal drive shaft, and the support is configured as a support bearing between the inner wall surface of the sleeve and the corresponding outer wall surface of the internal drive shaft.

8. The traction device of the multi-channel bag-making equipment as described in claim 2, characterized in that, in Each of the traction drive components includes a drive motor located on the side of the corresponding traction roller away from the other traction roller in the width direction of the frame, and a drive belt is provided between the output end of the drive motor and the corresponding end of the corresponding drive shaft.

9. The traction device of the multi-channel bag-making equipment as described in any one of claims 1 to 8, characterized in that, The traction device further includes a pair of clamping components disposed on the frame, wherein the width direction of the frame corresponds to the pair of traction components; wherein Each of the clamping assemblies includes a clamping drive component and a clamping part that is throttledly connected to the clamping drive component. The clamping part is spaced apart from the corresponding traction roller. The clamping drive component moves in conjunction with the clamping part toward the outer wall surface of the corresponding traction roller to clamp the substrate of the outer wall surface of the corresponding traction roller.

10. The traction device of the multi-channel bag-making equipment as described in claim 9, characterized in that, in Each of the clamping assemblies includes a clamping drive component, and the clamping part includes a clamping wheel. The clamping wheel is disposed on a mounting base rotatably connected to the frame. The output end of the clamping drive cylinder is fixedly connected to the mounting base. The clamping drive cylinder is linked to the mounting base to swing, causing the clamping wheel to move toward the outer wall surface of the corresponding traction roller.

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