A bottom drawing assembly of a paper bag machine

Abstract

The utility model discloses a paper bag machine draws bottom subassembly relates to paper bag machine field. The paper bag machine draws bottom subassembly including frame, the bottom subassembly still includes drive unit, first drive chain system, second drive chain system and a plurality of support shaft. The paper bag machine draws bottom subassembly through adopting motor main part direct integration setting different specifications first main sprocket and second main sprocket on the coaxial output shaft, has guaranteed the synchronization of power source, has eliminated double -drive system synchronization error risk, makes the running phase of first chain and second chain always keep consistent, utilizes the specification difference of two main sprocket and directly produces the preset, constant linear velocity difference, has simplified the overall mechanical structure, this not only reduces cost and failure rate, also has promoted transmission efficiency and response speed, and this component can complete the bottom forming action fast, avoids the wrinkle and deformation of bag bottom, and has promoted the forming quality of product.

Description

Technical Field

[0001] This utility model relates to the field of paper bag machine technology, specifically to a bottom-pulling component for a paper bag machine. Background Technology

[0002] In the paper bag manufacturing process, bottom stretching is the process of forming the three-dimensional structure of the paper bag. Its purpose is to stretch and shape the pre-glued flat bottom of the bag through mechanical action.

[0003] In existing technologies, some devices use two independent drive sources to drive two sets of bottom-pulling chains respectively, and generate speed differences by setting different rotation speeds to achieve bottom pulling. However, this dual-drive system has problems such as complex control and high cost. Moreover, it is difficult for the two drive units to maintain absolute synchronization during start-up, shutdown and speed adjustment, which can easily lead to uncoordinated bottom pulling actions, causing wrinkles, tears or irregular forming at the bottom of the paper bag, affecting product quality. Furthermore, this traditional structural design results in poor structural compactness, and the complex structure also leads to increased manufacturing and maintenance costs. In order to address the shortcomings of existing technologies, this utility model provides a bottom-pulling component for a paper bag machine to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a bottom-pulling component for a paper bag machine. By integrating a first and second main sprocket of different specifications directly onto the coaxial output shaft of the motor body, synchronization of the power source is ensured, eliminating the risk of synchronization errors in dual-drive systems and ensuring that the running phases of the first and second chains remain consistent. The difference in specifications between the two main sprockets directly generates a preset, constant linear speed difference, simplifying the overall mechanical structure. This not only reduces costs and failure rates but also improves transmission efficiency and response speed. The component utilizes the stable and reliable speed difference between the two parallel chains at the bottom-pulling station to apply a uniform and continuous staggered pulling force to the bottom of the paper bag, thereby quickly completing the bottom-pulling forming action, avoiding wrinkles and deformation of the bag bottom, and improving the forming quality of the product.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bottom-pulling assembly for a paper bag machine, comprising a frame, wherein the bottom-pulling assembly further comprises:

[0006] A drive unit is mounted on the frame. The drive unit includes a motor body and an output shaft driven by the motor. A first main sprocket and a second main sprocket are coaxially arranged on the output shaft.

[0007] A first drive chain system includes a first chain surrounding the first main sprocket;

[0008] The second drive chain system includes a second chain that surrounds the second main sprocket;

[0009] The first and second main sprockets have different specifications, which results in the first and second drive chain systems having different operating linear speeds.

[0010] Multiple support shafts are fixedly connected to the frame, and multiple driven sprockets are provided on them for supporting and guiding the first chain and the second chain.

[0011] Preferably, the motor body of the drive unit is a servo motor.

[0012] Preferably, the driven sprocket includes a fixed driven sprocket and an adjustable driven sprocket; the fixed driven sprocket is fixedly sleeved on the support shaft; the adjustable driven sprocket is rotatably mounted on the support shaft via an adjusting arm, and the tension of the first chain or the second chain is adjusted by swinging the adjusting arm.

[0013] Preferably, the adjusting arm is fixed to the support shaft by a locking bolt. Loosening the locking bolt allows the adjusting arm to swing and adjust the position of the adjustable driven sprocket.

[0014] Preferably, the number of teeth on the first main sprocket is greater than the number of teeth on the second main sprocket, so that the linear velocity of the first chain is greater than the linear velocity of the second chain.

[0015] Preferably, the first chain and the second chain are configured to be parallel to each other and spaced apart at the bottom-pulling station, and the speed difference between them is used to generate a misaligned pulling force on the bottom of the paper bag to achieve bottom-pulling.

[0016] Preferably, the number of support shafts is at least three sets, and the support shafts are used to define the annular transmission path of the first chain and the second chain.

[0017] Preferably, the adjusting arm is an L-shaped sheet metal part.

[0018] The technical effects and advantages of this utility model are as follows:

[0019] This paper bag machine's bottom-pulling assembly integrates a first and second main sprocket of different specifications directly on the coaxial output shaft of the motor body. This ensures power source synchronization, eliminates the risk of synchronization errors in dual-drive systems, and keeps the running phases of the first and second chains consistent. The difference in specifications between the two main sprockets directly generates a preset, constant linear speed difference, simplifying the overall mechanical structure. This not only reduces costs and failure rates but also improves transmission efficiency and response speed. The assembly utilizes the stable and reliable speed difference between the two parallel chains at the bottom-pulling station to apply a uniform and continuous staggered pulling force to the bottom of the paper bag, thereby quickly completing the bottom-pulling forming action, avoiding wrinkles and deformation of the bag bottom, and improving product forming quality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is an enlarged schematic diagram of the overall structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the motor of this utility model.

[0024] In the diagram: 1. Frame; 2. Motor body; 3. Output shaft; 4. First main sprocket; 5. Second main sprocket; 6. First chain; 7. Second chain; 8. Fixed driven sprocket; 9. Support shaft; 10. Adjustable driven sprocket; 11. Adjusting arm; 12. Locking bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This embodiment discloses a bottom-pulling assembly for a paper bag machine, according to the attached... Figure 1 To be continued Figure 3 As shown, the system includes a frame 1, a drive unit, a first transmission chain system, a second transmission chain system, and multiple support shafts 9. The drive unit is mounted on the frame 1 and includes a motor body 2 and an output shaft 3 driven by it. A first main sprocket 4 and a second main sprocket 5 are coaxially mounted on the output shaft 3. The first transmission chain system includes a first chain 6 surrounding the first main sprocket 4, and the second transmission chain system includes a second chain 7 surrounding the second main sprocket 5. The first main sprocket 4 and the second main sprocket 5 have different specifications, resulting in different linear operating speeds for the first and second transmission chain systems. Multiple support shafts 9 are fixedly connected to the frame 1 and have multiple driven sprockets mounted on them for supporting and guiding the first chain 6 and the second chain 7.

[0027] According to the appendix Figure 2 and attached Figure 3As shown, the motor body 2 of the drive unit is a servo motor, which allows for precise control of the rotational speed and position of the output shaft 3, thereby achieving precise adjustment of the chain running speed to adapt to the production needs of different paper bag specifications. Furthermore, according to the attached... Figure 2 As shown, the driven sprocket includes a fixed driven sprocket 8 and an adjustable driven sprocket 10; the fixed driven sprocket 8 is fixedly sleeved on the support shaft 9, providing a stable support point; the adjustable driven sprocket 10 is rotatably mounted on the support shaft 9 via an adjusting arm 11, and the tension of the first chain 6 or the second chain 7 is adjusted by swinging the adjusting arm 11 to ensure tight meshing between the chain and the sprocket and to prevent slippage or chain derailment.

[0028] According to the appendix Figure 2 As shown, the adjusting arm 11 is fixed to the support shaft 9 by the locking bolt 12. Loosening the locking bolt 12 allows the adjusting arm 11 to swing and adjust the position of the adjustable driven sprocket 10, thereby flexibly controlling the chain tension. After adjustment, tightening the locking bolt 12 fixes the position, making operation simple. (See attached diagram) Figure 3 As shown, the number of teeth on the first main sprocket 4 is greater than that on the second main sprocket 5, which makes the linear velocity of the first chain 6 greater than that of the second chain 7. This design utilizes the speed difference to generate the necessary misalignment tension at the bottom of the pull position.

[0029] Specifically disclosed, according to the appendix Figure 1 and attached Figure 2 As shown, the first chain 6 and the second chain 7 are configured to be parallel to each other and spaced apart at the bottom-pulling station. The speed difference between them generates a staggered pulling force on the bottom of the paper bag to achieve bottom pulling. This pulling force stretches and unfolds the bottom material of the paper bag, forming a flat bottom structure. According to the attached... Figure 2 As shown, the number of support shafts 9 is set to at least three sets. The support shafts 9 are used to define the circular transmission path of the first chain 6 and the second chain 7 to ensure that the chain runs smoothly and the path is accurate.

[0030] It needs to be emphasized that, according to the appendix Figure 2 As shown, the adjusting arm 11 is an L-shaped sheet metal part. This design provides sufficient structural strength to withstand chain tension while allowing the adjusting arm 11 to swing flexibly on the support shaft 9, enabling fine-tuning of the tension. It should be particularly emphasized that, according to the attached... Figure 1 To be continued Figure 3 As shown, the entire component has a compact structure and is installed on frame 1. Through the coordinated work of the drive unit and the transmission chain system, it efficiently completes the bottom pulling process of paper bags.

[0031] Example 1: This example uses the bottom-pulling process of a paper bag as an example, combined with the attached... Figure 1 To be continued Figure 3 Detailed explanation of the workflow: The workflow is as follows:

[0032] The motor body 2 of the drive unit starts, driving the output shaft 3 to rotate.

[0033] The first main sprocket 4 and the second main sprocket 5 on the output shaft 3 rotate simultaneously. However, since the first main sprocket 4 has more teeth than the second main sprocket 5, the first chain 6 runs at a higher linear speed, while the second chain 7 runs at a lower linear speed.

[0034] Guided by driven sprockets on multiple support shafts 9, the first chain 6 and the second chain 7 form a circular transmission path and maintain parallel spacing at the bottom-pulling station.

[0035] When the bottom of the paper bag enters the bottom-pulling station, the first chain 6 and the second chain 7 contact the bottom of the paper bag at different speeds, generating a misaligned pulling force, which stretches the bottom material of the paper bag and shapes it into the desired shape.

[0036] The chain tension is adjusted by the adjustable driven sprocket 10 and the adjusting arm 11 to ensure stable transmission and consistent bottoming effect.

[0037] Example 2: This example uses chain tension adjustment as an example, combined with the attached... Figure 1 To be continued Figure 3 Detailed explanation of the workflow: The workflow is as follows:

[0038] When the first chain 6 or the second chain 7 becomes loose due to long-term use, first loosen the locking bolt 12.

[0039] The swing adjustment arm 11 changes the position of the adjustable driven sprocket 10 relative to the support shaft 9, thereby tightening or loosening the chain.

[0040] Observe the chain tension, adjust it to the appropriate position, and tighten the locking bolt 12 to fix the position of the adjusting arm 11 and the adjustable driven sprocket 10.

[0041] This adjustment process can be performed online without disassembling components, making maintenance convenient and ensuring that the drivetrain system is always in optimal working condition.

[0042] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bottom-pulling assembly for a paper bag machine, comprising a frame (1), characterized in that, The bottom-pull component also includes: A drive unit is mounted on the frame (1). The drive unit includes a motor body (2) and an output shaft (3) driven by it. A first main sprocket (4) and a second main sprocket (5) are coaxially arranged on the output shaft (3). The first drive chain system includes a first chain (6) surrounding the first main sprocket (4). The second drive chain system includes a second chain (7) that surrounds the second main sprocket (5); The first main sprocket (4) and the second main sprocket (5) have different specifications, which makes the first transmission chain system and the second transmission chain system have different operating linear speeds; Multiple support shafts (9) are fixedly connected to the frame (1), and multiple driven sprockets are provided on them for supporting and guiding the first chain (6) and the second chain (7).

2. The paper bag machine bottom-pulling assembly according to claim 1, characterized in that, The motor body (2) of the drive unit is a servo motor.

3. The bottom-pulling assembly for a paper bag machine according to claim 1, characterized in that, The driven sprocket includes a fixed driven sprocket (8) and an adjustable driven sprocket (10); the fixed driven sprocket (8) is fixedly sleeved on the support shaft (9); the adjustable driven sprocket (10) is rotatably mounted on the support shaft (9) via an adjusting arm (11), and the tension of the first chain (6) or the second chain (7) is adjusted by swinging the adjusting arm (11).

4. The bottom-pulling assembly for a paper bag machine according to claim 3, characterized in that, The adjusting arm (11) is fixed to the support shaft (9) by a locking bolt (12). Loosening the locking bolt (12) allows the adjusting arm (11) to swing to adjust the position of the adjustable driven sprocket (10).

5. A bottom-pulling assembly for a paper bag machine according to claim 1, characterized in that, The first main sprocket (4) has more teeth than the second main sprocket (5), which makes the linear velocity of the first chain (6) greater than the linear velocity of the second chain (7).

6. A bottom-pulling assembly for a paper bag machine according to claim 1, characterized in that, The first chain (6) and the second chain (7) are configured to be parallel to each other and spaced apart at the bottom-pulling station, and the speed difference between them is used to generate a misaligned pulling force on the bottom of the paper bag to achieve bottom-pulling.

7. The bottom-pulling assembly for a paper bag machine according to claim 1, characterized in that, The number of support shafts (9) is set to at least three sets, and the support shafts (9) are used to define the annular transmission path of the first chain (6) and the second chain (7).

8. A bottom-pulling assembly for a paper bag machine according to claim 3, characterized in that, The adjusting arm (11) is an L-shaped sheet metal part.

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