Bag width adjustable bag clamping device

Abstract

The utility model belongs to the technical field of packing machine. Bag width adjustable bag clamping device, its characterized in being, include: pivot subassembly, the both ends of pivot subassembly set up first bag width adjusting mechanism, second bag width adjusting mechanism respectively, bag clamping mechanism, including, first bag clamping mechanism, set up in first bag width adjusting mechanism, first bag width adjusting mechanism drive first bag clamping mechanism along pivot subassembly and carry out linear reciprocating motion, second bag clamping mechanism, set up in second bag width adjusting mechanism, second bag width adjusting mechanism drive second bag clamping mechanism along pivot subassembly and carry out linear reciprocating motion. The utility model is used to solve the technical problem of existing bag feeding mechanical arm switching different width material bag, adjusting time -consuming and labor -intensive.

Description

Technical Field

[0001] This utility model belongs to the field of packaging machine technology, specifically relating to a bag clamping device with adjustable bag width. Background Technology

[0002] In the packaging machinery field, the bag-loading robotic arm, as the core equipment for automated bagging, directly determines production efficiency and packaging quality. Taking industries such as pet food, premixed feed, and additives as examples, their finished product materials come in various specifications (such as 5kg, 10kg, 25kg, etc.), with corresponding packaging bag widths varying significantly, typically exceeding 200mm in width (e.g., 5kg bags are 300mm wide, 25kg bags are 500mm wide). However, existing packaging machinery struggles to adapt to such wide-span bag requirements. In actual production, due to changes in packaging bag specifications, manual adjustment of the robotic arm width is often necessary to meet the bag width requirements.

[0003] Existing bag-loading robotic arms use threaded locking mechanisms such as bolts, nuts, and washers, which present the following technical problems: 1. Limited compatibility: Only applicable to bags of a single width; manual adjustment is required for different materials. 2. Slow adjustment speed: Traditional robotic arms need to be adapted to different bag widths by changing the gripper or manually adjusting mechanical parts (such as screws and limit blocks). The locking mechanism relies on mechanical bolts, and additional tightening steps are required after adjustment. The operation process is cumbersome and time-consuming, which cannot match the pace of high-speed production lines. 3. Lack of closed-loop control: During the adjustment process, the alignment and distance of the robotic arm rely entirely on human subjective judgment, which makes it difficult to guarantee accuracy. It may be necessary to make multiple adjustments to ensure the accuracy of the bag loading. 4. Traditional mechanical adjustment mechanisms are prone to wear due to frequent friction, requiring regular lubrication or replacement of parts, which increases equipment downtime and maintenance costs.

[0004] Based on extensive research and incomplete statistics, there are currently no patents, papers, or market applications in the packaging machinery field that involve research and application examples of bag-loading robotic arms for various bag widths. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable bag clamping device to solve the technical problem that the existing bag-loading robotic arm is time-consuming and labor-intensive when switching between bags of different widths.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: an adjustable bag clamping device, characterized in that it includes: A rotating shaft assembly, wherein a first bag width adjustment mechanism and a second bag width adjustment mechanism are respectively provided at both ends of the rotating shaft assembly; The bag clamping mechanism includes; The first bag clamping mechanism is mounted on the first bag width adjusting mechanism. The first bag width adjusting mechanism drives the first bag clamping mechanism to perform linear reciprocating motion along the rotating shaft assembly. The second bag clamping mechanism is mounted on the second bag width adjusting mechanism, which drives the second bag clamping mechanism to perform linear reciprocating motion along the rotating shaft assembly.

[0007] For bags with different width specifications, the first bag width adjustment mechanism drives the first bag clamping mechanism to perform linear reciprocating motion along the rotating shaft assembly; the second bag width adjustment mechanism drives the second bag clamping mechanism to perform linear reciprocating motion along the rotating shaft assembly, thereby changing the position of the first (second) bag clamping mechanism, and thus achieving adaptation to different bag widths.

[0008] To solve the technical problems of the rotating shaft assembly, the present invention adopts the following technical solution: the rotating shaft assembly includes a first base, a second base, a rotating shaft, and a rotating shaft drive component. The two ends of the rotating shaft are rotatably disposed on the first base and the second base, and the rotating shaft drive component drives and connects to the rotating shaft.

[0009] To solve the technical problem of how to implement the first bag width adjustment mechanism, this utility model adopts the following technical solution, wherein the first bag width adjustment mechanism includes: The first sliding bearing assembly includes a first sliding bearing and a first guide rod; both ends of the first guide rod are respectively mounted on the rotating shaft via corresponding first mounting brackets, and the first sliding bearing is slidably mounted on the first guide rod. The first driving member is hinged to the first mounting bracket, and the telescopic end of the first driving member is hinged to the first sliding bearing. The second bag width adjustment mechanism includes: The second sliding bearing assembly includes a second sliding bearing and a second guide rod; both ends of the second guide rod are mounted on the rotating shaft via corresponding second mounting brackets, and the second sliding bearing is slidably mounted on the second guide rod. The second drive component is hinged to the second mounting bracket, and the telescopic end of the second drive component is hinged to the second sliding bearing.

[0010] For bags with different widths, the position of the first (second) bag clamping mechanism can be changed by adjusting the extension length of the first (second) drive component, thereby achieving adaptation to different bag widths.

[0011] To solve the technical problem of the stability of the first and second bag width adjustment mechanisms, the present invention adopts the following technical solution: there are two first sliding bearing assemblies, which are respectively arranged on both sides of the rotating shaft. The two first sliding bearing assemblies are connected by a first connecting plate. A first connecting shaft is provided on the first connecting plate. The first connecting shaft is connected to the telescopic end of the first driving member by a first joint bearing. There are two second sliding bearing assemblies, which are respectively disposed on both sides of the rotating shaft. The two second sliding bearing assemblies are connected by a second connecting plate. A second connecting shaft is disposed on the second connecting plate. The second connecting shaft is connected to the telescopic end of the second drive member via a second spherical bearing.

[0012] This invention features two first sliding bearing assemblies symmetrically arranged on both sides of the rotating shaft assembly to ensure the consistency and stability of the reciprocating motion of the first and second bag width adjustment mechanisms.

[0013] To solve the technical problem of how the first bag-clamping mechanism is implemented, this utility model adopts the following technical solution, wherein the first bag-clamping mechanism includes: The first swing arm assembly includes a first swing arm bracket and a first swing arm drive component; the first swing arm bracket is connected to the first sliding bearing assembly via a first connecting frame, and the first swing arm bracket and the first connecting frame are rotatably connected; the fixed end of the first swing arm drive component is hinged to the inner side of the first swing arm bracket, and the telescopic end of the first swing arm drive component is connected to a third connecting shaft provided on the first connecting frame via a third joint bearing; the first swing arm drive component is used to drive the first swing arm assembly to swing inward and outward. The first bag clamping assembly includes two opposing first bag clamping grippers and a first bag clamping drive. The first bag clamping grippers are hinged to the first swing arm bracket, the fixed end of the first bag clamping drive is hinged to the first swing arm bracket, and the telescopic end of the first bag clamping drive is hinged to the first bag clamping grippers.

[0014] To solve the technical problem of how to implement the second bag clamping mechanism, this utility model adopts the following technical solution, wherein the second bag clamping mechanism includes: The second swing arm assembly includes a second swing arm bracket and a second swing arm drive component. The second swing arm bracket is connected to the second sliding bearing assembly via a second connecting frame, and the second swing arm bracket and the second connecting frame are rotatably connected. The fixed end of the second swing arm drive component is hinged to the inner side of the second swing arm bracket, and the telescopic end of the second swing arm drive component is connected to a fourth connecting shaft provided on the second connecting frame via a fourth joint bearing. The second swing arm drive component is used to drive the second swing arm assembly to swing in and out. The second bag clamping assembly includes two opposing second bag clamping grippers and a second bag clamping drive. The second bag clamping grippers are hinged to the second swing arm bracket, the fixed end of the second bag clamping drive is hinged to the second swing arm bracket, and the telescopic end of the second bag clamping drive is hinged to the second bag clamping grippers.

[0015] To address the issues of stability and alignment after bag clamping, this invention employs the following technical solution: the first bag width adjustment mechanism and the second bag width adjustment mechanism are symmetrically arranged on the rotating shaft assembly, resulting in a mirror-image design of the first bag clamping mechanism and the second bag clamping mechanism, thereby ensuring stability and alignment after bag clamping.

[0016] To solve the technical problem of how to implement the first and second driving components, the present invention adopts the following technical solution: the first driving component is a cylinder, an electric cylinder screw mechanism, or a worm gear mechanism. The second driving component is a cylinder, an electric cylinder, a lead screw mechanism, or a worm gear mechanism, which enables controllable linear motion.

[0017] To solve the technical problem of bag opening closure during bag loading, this utility model adopts the following technical solution: the bag width adjustable clamping device also includes a knife insertion mechanism to ensure that the bag opening is open during bag loading.

[0018] To solve the technical problem of how to implement the inserting mechanism, this utility model adopts the following technical solution, wherein the inserting mechanism includes: A blade inserter arm, which is mounted on the rotating shaft assembly via a fixing block; The insert shaft is rotatably connected to the insert arm; A inserter is mounted on the inserter shaft via an inserter mounting block; the mounting position of the inserter on the inserter mounting block is adjustable, so that the extension length of the inserter is adjustable. The insert drive component has its fixed end hinged to the insert arm, and its telescopic end hinged to the insert shaft. The extension length of the insert is adjustable to meet the needs of different bags. Attached Figure Description

[0019] Figure 1 This utility model is a three-dimensional adjustable bag clamping device. Figure 1 ; Figure 2 This is a schematic diagram of the first bag width adjustment mechanism and the first bag clamping mechanism of the adjustable bag width clamping device of this utility model; Figure 3 This is a schematic diagram of the second bag width adjustment mechanism and the second bag clamping mechanism of the adjustable bag width clamping device of this utility model; Figure 4This is a schematic diagram of the insert arm of the adjustable bag clamping device of this utility model; Figure 5 This is a schematic diagram of the adjustable bag clamping device of this utility model adapted to the maximum bag width; Figure 6 This is a schematic diagram of the adjustable bag clamping device of this utility model adapted to the minimum bag width; Figure 7 This utility model is a three-dimensional adjustable bag clamping device. Figure 2 (Using an electric cylinder); In the picture: 10-bag width adjustable bag clamping device; 100 Rotary shaft assembly; 101 First base; 102 Second base; 103 Rotary shaft; 104 Rotary shaft drive component; 200 First bag width adjustment mechanism; 210 First sliding bearing assembly; 211 First sliding bearing; 212 First guide rod; 213 First mounting bracket; 214 First connecting plate; 215 First connecting shaft; 216 First spherical bearing; 220 First driving component; 300 Second bag width adjustment mechanism; 310 Second sliding bearing assembly; 311 Second sliding bearing; 312 Second guide rod; 313 Second mounting bracket; 314 Second connecting plate; 315 Second connecting shaft; 316 Second spherical bearing; 320 Second driving component; 400 First bag clamping mechanism; 410 First swing arm assembly; 411 First swing arm bracket; 412 First swing arm drive component; 413 First connecting frame; 414 Third connecting shaft; 415 Third joint bearing; 420 First bag clamping assembly; 421 First bag clamping gripper; 422 First bag clamping drive component; 500 Second bag clamping mechanism; 510 Second swing arm assembly; 511 Second swing arm bracket; 512 Second swing arm drive; 513 Second connecting frame; 514 Third connecting shaft; 515 Third joint bearing; 520 Second bag clamping assembly; 521 Second bag clamping gripper; 522 Second bag clamping drive; 600 Tool insertion mechanism; 610 Tool insertion arm; 611 Fixing block; 620 Tool insertion shaft; 630 Tool insertion; 631 Tool insertion mounting block; 640 Tool insertion drive component; 701 Maximum bag width material bag; 702 Minimum bag width material bag. Detailed Implementation

[0020] The present invention will be further described below with reference to the figures.

[0021] Example 1 like Figure 1 As shown, the adjustable bag width clamping device 10 includes a rotating shaft assembly 100, a first bag width adjustment mechanism 200, a second bag width adjustment mechanism 300, and a bag clamping mechanism.

[0022] In one embodiment, such as Figure 1 As shown, the rotating shaft assembly 100 includes a first base 101, a second base 102, a rotating shaft 103, and a rotating shaft drive 104. The two ends of the rotating shaft 102 are rotatably mounted on the first base 101 and the second base 102, and the rotating shaft drive 104 drives and connects to the rotating shaft 103. One end of the rotating shaft 103 is connected to the rotating shaft drive 104, and both ends of the rotating shaft 103 are connected to the first base 101 and the second base 102.

[0023] The two ends of the rotating shaft assembly 100 are respectively provided with a first bag width adjustment mechanism 200 and a second bag width adjustment mechanism 300.

[0024] In one embodiment, such as Figure 2 As shown, the first bag width adjustment mechanism 200 includes a first sliding bearing assembly 210 and a first drive member 220.

[0025] The first sliding bearing assembly 210 includes a first sliding bearing 211 and a first guide rod 212; Both ends of the first guide rod 212 are respectively mounted on the rotating shaft 103 via corresponding first mounting brackets 213, and a first sliding bearing 211 is slidably mounted on the first guide rod 212; The fixed end of the first driving member 220 is hinged to the first mounting bracket 213, and the telescopic end of the first driving member 220 is hinged to the first sliding bearing 211.

[0026] In one embodiment, there are two first sliding bearing assemblies 210, which are respectively disposed on both sides of the rotating shaft 103. The two first sliding bearing assemblies 210 are connected by a first connecting plate 214. A first connecting shaft 215 is disposed on the first connecting plate 214. The first connecting shaft 215 is connected to the telescopic end of the first driving member 220 via a first spherical bearing 216.

[0027] In one embodiment, the first driving element 220 can be a cylinder. The first driving element 220 can also be a structure that realizes controllable linear motion, such as an electric cylinder, a lead screw mechanism, or a worm gear mechanism. Taking an electric cylinder as an example: the electric cylinder uses closed-loop servo control, which has just the right precision and stability, and can stop at any position within the range of the electric cylinder's extension rod. Figure 7 . In one embodiment, such as Figure 3 As shown, the second bag width adjustment mechanism 300 includes a second sliding bearing assembly 310 and a second drive member 320.

[0028] The second sliding bearing assembly 310 includes a second sliding bearing 311 and a second guide rod 312; the two ends of the second guide rod 312 are mounted on the rotating shaft 103 via corresponding second mounting brackets 313, and the second sliding bearing 311 is slidably mounted on the second guide rod 312. The fixed end of the second driving member 320 is hinged to the second mounting bracket 313, and the telescopic end of the second driving member 320 is hinged to the second sliding bearing 312.

[0029] In one embodiment, there are two second sliding bearing assemblies 310, which are respectively disposed on both sides of the rotating shaft 103. The two second sliding bearing assemblies are connected by a second connecting plate 314. A second connecting shaft 315 is disposed on the second connecting plate 314. The second connecting shaft 315 is connected to the telescopic end of the second drive member 320 via a second spherical bearing 316.

[0030] In one embodiment, the second driving element 320 can be a cylinder. The first driving element 220 can also be a structure that realizes controllable linear motion, such as an electric cylinder, a lead screw mechanism, a worm gear mechanism, etc. Taking an electric cylinder as an example: the electric cylinder adopts closed-loop servo control, which has just the right precision and stability, and can stop at any position within the range of the electric cylinder's extension rod. Figure 7 .

[0031] The bag clamping mechanism includes a first bag clamping mechanism 400 and a second bag clamping mechanism 500.

[0032] The first bag clamping mechanism 400 is disposed on the first bag width adjusting mechanism 200, and the first bag width adjusting mechanism 200 drives the first bag clamping mechanism 400 to perform linear reciprocating motion along the rotating shaft assembly 100. In one embodiment, such as Figure 2 As shown, the first bag clamping mechanism 400 includes a first swing arm assembly 410 and a first bag clamping assembly 420.

[0033] The first swing arm assembly 410 includes a first swing arm bracket 411 and a first swing arm drive member 412. The first swing arm bracket 411 is connected to the first sliding bearing assembly 210 via a first connecting frame 413, and the first swing arm bracket 411 and the first connecting frame 413 are rotatably connected. The fixed end of the first swing arm drive member 412 is hinged to the inner side of the first swing arm bracket 411, and the telescopic end of the first swing arm drive member 412 is connected to the third connecting shaft 414 provided on the first connecting frame 413 via a third joint bearing 415. The first swing arm drive member 412 is used to drive the first swing arm assembly to swing inward and outward.

[0034] The first bag clamping assembly 420 includes two opposing first bag clamping grippers 421 and a first bag clamping drive member 422. The first bag clamping grippers 421 are hinged to the first swing arm bracket 411. The fixed end of the first bag clamping drive member 422 is hinged to the first swing arm bracket 411. The telescopic end of the second bag clamping drive member 422 is hinged to the second bag clamping grippers 421.

[0035] The second bag clamping mechanism 500 is mounted on the second bag width adjusting mechanism 300. The second bag width adjusting mechanism 300 drives the second bag clamping mechanism 500 to perform linear reciprocating motion along the rotating shaft assembly 100.

[0036] In one embodiment, such as Figure 3 As shown, the second bag clamping mechanism 500 includes a second swing arm assembly 510 and a second bag clamping assembly 520.

[0037] The second swing arm assembly 510 includes a second swing arm bracket 511 and a second swing arm drive member 512. The structure of the second swing arm assembly 510 is exactly the same as that of the first swing arm assembly 410, but they are mirror images of each other. The second swing arm bracket 511 is connected to the second sliding bearing assembly 310 via a second connecting frame 513, and the second swing arm bracket 511 and the second connecting frame 513 are rotatably connected. A fourth connecting shaft 514 is provided on the second connecting frame 513. The second swing arm drive member 512 is used to drive the second swing arm assembly 510 to swing in and out. The fixed end of the second swing arm drive member 512 is hinged to the inner side of the second swing arm bracket 511, and the telescopic end of the second swing arm drive member 512 is connected to the fourth connecting shaft 514 via a fourth joint bearing 515.

[0038] The second bag clamping assembly 520 includes two opposing second bag clamping grippers 521 and a second bag clamping drive member 522. The second bag clamping grippers 521 are hinged to the second swing arm bracket 511. The fixed end of the second bag clamping drive member 522 is hinged to the second swing arm bracket 511. The telescopic end of the second bag clamping drive member 522 is hinged to the inner second bag clamping gripper 521.

[0039] In one embodiment, the first bag width adjustment mechanism 200 and the second bag width adjustment mechanism 300 are symmetrically arranged on the rotating shaft assembly 100, so that the first bag clamping mechanism and the second bag clamping mechanism are mirror-designed to ensure stability and centering after clamping the bag.

[0040] In one embodiment, such as Figure 1 As shown, the bag-width adjustable clamping device 10 also includes a knife insertion mechanism 600. Specifically, as... Figure 4 As shown, the inserting mechanism 600 includes an inserting arm 610, an inserting shaft 620, an inserting blade 630, and an inserting drive component 640.

[0041] The insert arm 620 is mounted on the rotating shaft assembly 100 via a fixing block 621. Specifically, both one side of the insert arm 620 and the fixing block 621 are provided with grooves, which can be inserted into the rotating shaft 103 and are connected to the rotating shaft 103 after being fixed by bolts.

[0042] The insert shaft 620 is rotatably connected to the insert arm 610. Specifically, the insert arm 620 is connected to the insert shaft 620 via bearings.

[0043] The inserter is mounted on the inserter shaft. Specifically, the inserter 630 is mounted on the inserter shaft 620 via the inserter mounting block 631; the mounting position of the inserter 630 on the inserter mounting block 631 is adjustable, allowing the extension length of the inserter 630 to be adjusted. Specifically, both the inserter mounting block 631 and the inserter 630 are provided with adjustment holes. After the inserter 630 is adjusted to a suitable position, a bolt is used to lock it in the adjustment hole, thus achieving adjustable inserter position. The fixed end of the insert drive component 640 is hinged to the insert arm 620, and the telescopic end of the insert drive component 640 is hinged to the insert shaft 620. Specifically, the fixed end of the insert drive cylinder 640 is mounted in the middle position of the insert arm by means of a hinge, and its telescopic end is hinged to the insert shaft 620.

[0044] The first bag width adjustment mechanism 200, the first bag clamping mechanism 400, the second bag width adjustment mechanism 300, the second bag clamping mechanism 500, and the inserting knife mechanism 600 are all mounted on the rotating shaft 103. The first (second) sliding bearing and the first (second) driving component are bolted to the rotating shaft via the first (second) mounting bracket, and the first (second) sliding bearing and the first (second) driving component are hinged together by a spherical bearing. In actual adjustment, the position of the first (second) swing arm bracket can be adjusted by controlling the extension distance of the first (second) driving component. The first (second) connecting bracket at one end of the first (second) swing arm bracket is bolted to the first (second) sliding bearing, and the other side is hinged to two first (second) bag clamping claws, one of which is hinged to the first (second) bag clamping driving component.

[0045] How to use the adjustable bag clamping device: For bags with different width specifications, the position of the first (second) swing arm bracket can be changed by adjusting the extension length of the first (second) drive component, thereby achieving adaptation to different bag widths.

[0046] The cylinder has two extreme positions: fully extended and fully retracted. ① Figure 5 The diagram shows the bag clamping mechanism adapted to the device with a maximum bag width, including the bag-loading robotic arm 10 and the maximum bag width material bag 701. When the cylinder is fully extended, the maximum bag width that can be clamped is W1.

[0047] ② Figure 6The diagram shows the minimum bag width that the device is adapted to, including the bag-loading robotic arm 10 and the minimum bag width material bag 702. When the cylinder is fully retracted, the minimum bag width that can be gripped is W2.

[0048] In practical applications, when the width of the material bag needs to be changed or adjusted, the extension position of the cylinder can be controlled simply by inputting the adjustment value through the control panel, thereby adjusting the width distance between the two swing arms. The electrical components of the device can be explosion-proofed as required.

[0049] This invention enables tool-free, rapid, stepless adjustment for different widths; closed-loop control ensures precise adjustment and positioning, high device stability, long service life, and low maintenance costs.

[0050] This utility model has wide adaptability and can meet the clamping of packaging bags of different widths; it adopts a dual-bearing linkage structure, combined with drive control, to achieve tool-free stepless adjustment of the width between the two robotic arms; closed-loop servo control provides high control precision, accurate positioning, and high reliability; the integrated electrical design provides a high protection level, long service life, and is also easy to implement explosion-proof treatment.

[0051] This utility model is a brand-new product developed specifically for the needs of current projects. It reduces the complexity of manually adjusting for different bag widths and realizes automatic switching for the applicability of material bags of different sizes. The switching process is convenient, quick, and can be operated with one button, which greatly improves customer satisfaction and increases the production efficiency of packaging in multi-formula industries.

[0052] Based on demand, we have developed bag clamping devices suitable for various bag widths for industries with multiple specifications and varieties of materials such as pet food, premixed feed, and additives. These devices can automatically switch between applicable bag widths with a single click, improving the adaptability of the equipment and enhancing the competitiveness of the packaging products.

[0053] The above embodiments are only for illustrating the technical features and concept of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made according to the spirit and implementation of this utility model should be covered within the protection scope of this utility model.

Claims

1. An adjustable bag clamping device, characterized in that, include: A rotating shaft assembly, wherein a first bag width adjustment mechanism and a second bag width adjustment mechanism are respectively provided at both ends of the rotating shaft assembly; The bag clamping mechanism includes; The first bag clamping mechanism is mounted on the first bag width adjusting mechanism. The first bag width adjusting mechanism drives the first bag clamping mechanism to perform linear reciprocating motion along the rotating shaft assembly. The second bag clamping mechanism is mounted on the second bag width adjusting mechanism, which drives the second bag clamping mechanism to perform linear reciprocating motion along the rotating shaft assembly.

2. The bag-width adjustable clamping device according to claim 1, characterized in that, The rotating shaft assembly includes a first base, a second base, a rotating shaft, and a rotating shaft drive component. The two ends of the rotating shaft are rotatably mounted on the first base and the second base, and the rotating shaft drive component drives and connects to the rotating shaft.

3. The bag-width adjustable clamping device according to claim 2, characterized in that, The first bag width adjustment mechanism includes: The first sliding bearing assembly includes a first sliding bearing and a first guide rod; both ends of the first guide rod are respectively mounted on the rotating shaft via corresponding first mounting brackets, and the first sliding bearing is slidably mounted on the first guide rod. The first driving member is hinged to the first mounting bracket, and the telescopic end of the first driving member is hinged to the first sliding bearing. The second bag width adjustment mechanism includes: The second sliding bearing assembly includes a second sliding bearing and a second guide rod; both ends of the second guide rod are mounted on the rotating shaft via corresponding second mounting brackets, and the second sliding bearing is slidably mounted on the second guide rod. The second drive component is hinged to the second mounting bracket, and the telescopic end of the second drive component is hinged to the second sliding bearing.

4. The bag-width adjustable clamping device according to claim 3, characterized in that, There are two first sliding bearing assemblies, which are respectively disposed on both sides of the rotating shaft. The two first sliding bearing assemblies are connected by a first connecting plate. A first connecting shaft is disposed on the first connecting plate. The first connecting shaft is connected to the telescopic end of the first driving member via a first spherical bearing. There are two second sliding bearing assemblies, which are respectively disposed on both sides of the rotating shaft. The two second sliding bearing assemblies are connected by a second connecting plate. A second connecting shaft is disposed on the second connecting plate. The second connecting shaft is connected to the telescopic end of the second drive member via a second spherical bearing.

5. The bag-width adjustable clamping device according to claim 3 or 4, characterized in that, The first bag clamping mechanism includes: The first swing arm assembly includes a first swing arm bracket and a first swing arm drive component; the first swing arm bracket is connected to the first sliding bearing assembly via a first connecting frame, and the first swing arm bracket and the first connecting frame are rotatably connected; the fixed end of the first swing arm drive component is hinged to the inner side of the first swing arm bracket, and the telescopic end of the first swing arm drive component is connected to a third connecting shaft provided on the first connecting frame via a third joint bearing; the first swing arm drive component is used to drive the first swing arm assembly to swing inward and outward. The first bag clamping assembly includes two opposing first bag clamping grippers and a first bag clamping drive. The first bag clamping grippers are hinged to the first swing arm bracket, the fixed end of the first bag clamping drive is hinged to the first swing arm bracket, and the telescopic end of the first bag clamping drive is hinged to the first bag clamping grippers.

6. The bag-width adjustable clamping device according to claim 3 or 4, characterized in that, The second bag clamping mechanism includes: The second swing arm assembly includes a second swing arm bracket and a second swing arm drive component. The second swing arm bracket is connected to the second sliding bearing assembly via a second connecting frame, and the second swing arm bracket and the second connecting frame are rotatably connected. The fixed end of the second swing arm drive component is hinged to the inner side of the second swing arm bracket, and the telescopic end of the second swing arm drive component is connected to a fourth connecting shaft provided on the second connecting frame via a fourth joint bearing. The second swing arm drive component is used to drive the second swing arm assembly to swing in and out. The second bag clamping assembly includes two opposing second bag clamping grippers and a second bag clamping drive. The second bag clamping grippers are hinged to the second swing arm bracket, the fixed end of the second bag clamping drive is hinged to the second swing arm bracket, and the telescopic end of the second bag clamping drive is hinged to the second bag clamping grippers.

7. The bag-width adjustable clamping device according to claim 1, characterized in that, The first bag width adjustment mechanism and the second bag width adjustment mechanism are symmetrically arranged on the rotating shaft assembly.

8. The bag-width adjustable clamping device according to claim 3, characterized in that, The first driving component is a cylinder, an electric cylinder screw mechanism, or a worm gear mechanism; The second driving component is a cylinder, an electric cylinder, a lead screw mechanism, or a worm gear mechanism.

9. The bag-width adjustable clamping device according to claim 1, characterized in that, The adjustable bag clamping device also includes a knife insertion mechanism.

10. The bag-width adjustable clamping device according to claim 9, characterized in that, The inserting mechanism includes: A blade inserter arm, which is mounted on the rotating shaft assembly via a fixing block; The insert shaft is rotatably connected to the insert arm; A inserter is mounted on the inserter shaft via an inserter mounting block; the mounting position of the inserter on the inserter mounting block is adjustable, so that the extension length of the inserter is adjustable. A blade inserter drive, wherein the fixed end of the blade inserter drive is hinged to the blade inserter arm, and the telescopic end of the blade inserter drive is hinged to the blade inserter shaft.

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