Automatic bag clamping machine

Abstract

The application relates to the technical field of automatic bag clamping machines, and discloses an automatic bag clamping machine, which comprises a mounting table arranged at the upper end of a support, a leakage hopper arranged at the middle part of the mounting table, an opening above the mounting table being a feeding port, and an opening below the mounting table being a discharging port; a first bag clamping arm and a second bag clamping arm are arranged at the two sides of the discharging port and surround the leakage hopper sidewall at the discharging port, and the inner sides of the first bag clamping arm and the second bag clamping arm are respectively provided with a first flexible pressing strip and a second flexible pressing strip; a piston rod of a cylinder is rotationally connected with the upper end of a first connecting rod, the lower end of the first connecting rod is connected with one end of the first bag clamping arm, the shell of the cylinder is rotationally connected with the upper end of a second connecting rod, the lower end of the second connecting rod is connected with one end of the second bag clamping arm, a first supporting arm is arranged in the middle part of the first connecting rod, the end part of the first supporting arm is rotationally connected with the mounting table, a second supporting arm is arranged in the middle part of the second connecting rod, and the end part of the second supporting arm is rotationally connected with the mounting table.

Description

Technical Field

[0001] This application relates to the field of automatic bag clamping machine technology, and specifically to an automatic bag clamping machine. Background Technology

[0002] In the packaging of powdery or granular materials (such as fertilizers, grains, and chemical raw materials), it is often necessary to fill the materials into open packaging bags. Traditional manual bagging and clamping methods have the following significant problems:

[0003] Low efficiency and high labor intensity: Workers need to manually align the bag opening with the discharge port and press it to fix it. After filling, they need to manually remove it. The operation is cumbersome and slow.

[0004] Unstable clamping and leakage risk: Manual pressing makes it difficult to ensure that the bag opening is evenly stressed, which can easily lead to material leakage from the gaps during filling, resulting in waste and environmental pollution.

[0005] Poor adaptability: The clamping force needs to be adjusted for packaging bags of different thicknesses or slightly deformed bags. Manual operation is difficult to control precisely, and it is easy to cause the bags to not be clamped tightly or to break.

[0006] Safety hazards: Workers' hands need to be close to the discharge port, and there is a risk of being splashed or pinched by materials.

[0007] While some existing simple mechanical bag clamping devices can replace some manual labor, they generally suffer from problems such as uneven clamping force, poor adaptability to different bag types, complex structure making maintenance difficult, or low degree of automation. Therefore, there is an urgent need for a bag clamping mechanism that can automatically, reliably, and efficiently clamp the opening of packaging bags, is highly adaptable, and easy to operate. Summary of the Invention

[0008] The purpose of this application is to provide an automatic bag clamping machine to solve the problems of uneven clamping force, poor adaptability to different bag types, complex structure and difficult maintenance or low degree of automation in the existing manual bag clamping methods.

[0009] To achieve the above objectives, this application provides an automatic bag clamping machine, comprising: a bracket, a mounting platform, a hopper, a cylinder, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a first bag clamping arm, and a second bag clamping arm, wherein...

[0010] The mounting platform is located at the upper end of the bracket, and the hopper is located in the middle of the mounting platform. The opening of the hopper above the mounting platform is the inlet, and the opening of the hopper below the mounting platform is the outlet.

[0011] The first bag clamping arm and the second bag clamping arm are respectively disposed on both sides of the discharge port, and the first bag clamping arm and the second bag clamping arm are arc-shaped, surrounding the side wall of the hopper at the discharge port. The inner sides of the first bag clamping arm and the second bag clamping arm are respectively provided with a first flexible pressure strip and a second flexible pressure strip. The two ends of the first flexible pressure strip are respectively connected to the two ends of the first bag clamping arm, and the two ends of the second flexible pressure strip are respectively connected to the two ends of the second bag clamping arm.

[0012] The piston rod of the cylinder is rotatably connected to the upper end of the first connecting rod, the lower end of the first connecting rod is connected to one end of the first bag clamping arm, the housing of the cylinder is rotatably connected to the upper end of the second connecting rod, the lower end of the second connecting rod is connected to one end of the second bag clamping arm, a first support arm is provided in the middle of the first connecting rod, the end of the first support arm is rotatably connected to the mounting platform, and the rotation axis is perpendicular to the piston rod; a second support arm is provided in the middle of the second connecting rod, the end of the second support arm is rotatably connected to the mounting platform, and the rotation axis is perpendicular to the piston rod.

[0013] The upper ends of the third and fourth connecting rods are rotatably connected to the mounting platform, and the rotation axis is perpendicular to the piston rod. The lower ends of the third and fourth connecting rods are respectively connected to the other ends of the first and second bag clamping arms.

[0014] Optionally, the end of the piston rod is rotatably connected to one end of a first connecting shaft, and the other end of the first connecting shaft is rotatably connected to the upper end of the first connecting rod.

[0015] Optionally, the cylinder has a connecting block at its tail end, which is rotatably connected to one end of a second connecting shaft, and the other end of the second connecting shaft is rotatably connected to the upper end of the second connecting rod.

[0016] Optionally, the lower end of the mounting platform is provided with a first connecting plate and a second connecting plate, the ends of the first and second support arms are rotatably connected to the first connecting plate, and the rotation axis is perpendicular to the piston rod, the upper ends of the third and fourth connecting rods are rotatably connected to the second connecting plate, and the rotation axis is perpendicular to the piston rod.

[0017] Optionally, the mounting platform is provided with a pneumatic switch, the pneumatic switch is provided with a handle, the air inlet of the pneumatic switch is connected to a first air pipe, the air outlet of the pneumatic switch is connected to a second air pipe, and the other end of the second air pipe is connected to the cylinder body of the cylinder.

[0018] Optionally, the two ends of the first flexible pressure strip and the second flexible pressure strip are respectively fixedly connected to the two ends of the first bag clamping arm and the second bag clamping arm by connecting bolts.

[0019] Optionally, the lower end of the bracket is provided with a base.

[0020] Optionally, the hopper is funnel-shaped, and the diameter of the inlet is larger than the diameter of the outlet.

[0021] The embodiments of this application have the following advantages:

[0022] High-efficiency and reliable clamping:

[0023] It adopts a double arc-shaped bag clamping arm + flexible pressure strip design, which perfectly fits the outer wall of the material hopper outlet to form a ring-shaped clamping force.

[0024] Flexible pressure strips (such as rubber) deform under pressure, which can tightly fill the gap between the bag opening and the hopper wall, effectively preventing leakage, while protecting the bag opening from damage by rigid components.

[0025] Excellent adaptability:

[0026] The elasticity and deformability of the flexible sealing strip allow it to adapt to packaging bag openings of different thicknesses, slight wrinkles, or minor deformations, ensuring a tight seal.

[0027] The curved clamp design allows for a certain degree of tolerance for bag openings of different diameters.

[0028] Easy and effortless to operate:

[0029] The pneumatic switch handle allows for one-button control of the cylinder's movement, enabling the bag clamping arm to open and close, significantly reducing the workload for workers.

[0030] Workers simply need to put the bag opening over the discharge port and pull the handle to clamp it. After filling, they can pull the handle to release it.

[0031] The clamping force is large and uniform:

[0032] The four-bar linkage (first to fourth connecting rods) efficiently converts the linear motion of the cylinder into the rotational clamping motion of the bag-gripping arm.

[0033] This mechanism has a force-amplifying effect, enabling a relatively small cylinder thrust to generate a larger clamping force.

[0034] The design of two pairs of connecting rods (the first and second connecting rods have support arms, while the third and fourth connecting rods are independent) ensures that the bag clamping arms on both sides move synchronously and in parallel, and the applied clamping force is evenly distributed along the circumference of the bag opening.

[0035] Stable structure and precise movement:

[0036] The rotation axis of all rotating connection points is perpendicular to the cylinder piston rod, ensuring the consistency of the motion plane and preventing jamming.

[0037] The first connecting plate fixes the rotation points of the first and second connecting rods, and the second connecting plate fixes the rotation points of the third and fourth connecting rods. The structure has good rigidity and the motion trajectory is stable and accurate.

[0038] Easy to maintain:

[0039] Key components (such as flexible pressure strips) are connected by bolts, which facilitates quick replacement after wear.

[0040] The pneumatic system (cylinder, switch, air pipe) is mature, reliable, and easy to maintain.

[0041] In summary, this automatic bag clamping machine utilizes a pneumatically driven parallel four-bar linkage mechanism to efficiently and stably convert the linear motion of the cylinder into the synchronous parallel opening and closing motion of two arc-shaped bag clamping arms. It also leverages the elastic deformation of the flexible pressure strip to achieve reliable clamping, sealing, and self-adaptation of the packaging bag opening. Its design significantly improves packaging efficiency, clamping reliability, operational safety, and adaptability to different bag openings, effectively solving the problems associated with traditional manual or simple mechanical bag clamping methods. Attached Figure Description

[0042] To more clearly illustrate the embodiments of this application or the technical solutions in 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 merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0043] Figure 1 A front view of an automatic bag clamping machine provided for at least one embodiment of this application;

[0044] Figure 2 A rear view of an automatic bag clamping machine provided for at least one embodiment of this application;

[0045] Figure 3 A left view of an automatic bag clamping machine provided for at least one embodiment of this application;

[0046] Figure 4 A right view of an automatic bag clamping machine provided for at least one embodiment of this application;

[0047] Figure 5 This is a schematic diagram of the structure of a first bag clamping arm and a second bag clamping arm of an automatic bag clamping machine provided for at least one embodiment of this application.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Bracket, 2. Mounting platform, 3. Flying hopper, 4. Inlet, 5. Outlet, 6. Cylinder, 7. Piston rod, 8. Connecting block, 9. First connecting shaft, 10. Second connecting shaft, 11. First connecting rod, 12. Second connecting rod, 13. First support arm, 14. Second support arm, 15. Third connecting rod, 16. Fourth connecting rod, 17. First bag clamping arm, 18. Second bag clamping arm, 19. First flexible pressure strip, 20. Second flexible pressure strip, 21. Connecting bolt, 22. Pneumatic switch, 23. Handle, 24. First air pipe, 25. Second air pipe, 26. First connecting plate, 27. Second connecting plate, 28. Base. Detailed Implementation

[0050] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, 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 this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0053] This application provides an automatic bag clamping machine, see reference. Figures 1 to 5 ,include:

[0054] 1. Support bracket; 2. Mounting platform; 3. Material hopper; 6. Cylinder; 11. First connecting rod; 12. Second connecting rod; 15. Third connecting rod; 16. Fourth connecting rod; 17. First bag clamping arm; 18. Second bag clamping arm.

[0055] The mounting platform 2 is located at the upper end of the bracket 1, and the hopper 3 is located in the middle of the mounting platform 2. The opening of the hopper 3 above the mounting platform 2 is the inlet 4, and the opening of the hopper 3 below the mounting platform 2 is the outlet 5.

[0056] The first bag clamping arm 17 and the second bag clamping arm 18 are respectively disposed on both sides of the discharge port 5, and the first bag clamping arm 17 and the second bag clamping arm 18 are arc-shaped, surrounding the side wall of the hopper 3 at the discharge port 5. The inner sides of the first bag clamping arm 17 and the second bag clamping arm 18 are respectively provided with a first flexible pressure strip 19 and a second flexible pressure strip 20. The two ends of the first flexible pressure strip 19 are respectively connected to the two ends of the first bag clamping arm 17, and the two ends of the second flexible pressure strip 20 are respectively connected to the two ends of the second bag clamping arm 18.

[0057] The piston rod 7 of the cylinder 6 is rotatably connected to the upper end of the first connecting rod 11, the lower end of the first connecting rod 11 is connected to one end of the first bag clamping arm 17, the housing of the cylinder 6 is rotatably connected to the upper end of the second connecting rod 12, the lower end of the second connecting rod 12 is connected to one end of the second bag clamping arm 18, the first connecting rod 11 is provided with a first support arm 13 in the middle, the end of the first support arm 13 is rotatably connected to the mounting platform 2, and the rotation axis is perpendicular to the piston rod 7; the second connecting rod 12 is provided with a second support arm 14 in the middle, the end of the second support arm 14 is rotatably connected to the mounting platform 2, and the rotation axis is perpendicular to the piston rod 7.

[0058] The upper ends of the third connecting rod 15 and the fourth connecting rod 16 are rotatably connected to the mounting platform 2, and the rotation axis is perpendicular to the piston rod 7. The lower ends of the third connecting rod 15 and the fourth connecting rod 16 are respectively connected to the other ends of the first bag clamping arm 17 and the second bag clamping arm 18.

[0059] In some embodiments, the end of the piston rod 7 is rotatably connected to one end of the first connecting shaft 9, and the other end of the first connecting shaft 9 is rotatably connected to the upper end of the first connecting rod 11.

[0060] In some embodiments, the tail end of the cylinder 6 is provided with a connecting block 8, the connecting block 8 is rotatably connected to one end of the second connecting shaft 10, and the other end of the second connecting shaft 10 is rotatably connected to the upper end of the second connecting rod 12.

[0061] In some embodiments, the lower end of the mounting platform 2 is provided with a first connecting plate 26 and a second connecting plate 27, the ends of the first support arm 13 and the second support arm 14 are rotatably connected to the first connecting plate 26, and the rotation axis is perpendicular to the piston rod 7, the upper ends of the third connecting rod 15 and the fourth connecting rod 16 are rotatably connected to the second connecting plate 27, and the rotation axis is perpendicular to the piston rod 7.

[0062] In some embodiments, the mounting platform 2 is provided with a pneumatic switch 22, the pneumatic switch 22 is provided with a handle 23, the air inlet of the pneumatic switch 22 is connected to a first air pipe 24, the air outlet of the pneumatic switch 22 is connected to a second air pipe 25, and the other end of the second air pipe 25 is connected to the cylinder body of the cylinder 6.

[0063] Specifically, the pneumatic switch 22 is used to control the extension and retraction of the piston rod 7 of the cylinder 6 by operating the handle 23.

[0064] In some embodiments, the two ends of the first flexible pressure strip 19 and the second flexible pressure strip 20 are respectively fixedly connected to the two ends of the first bag clamping arm 17 and the second bag clamping arm 18 by connecting bolts 21.

[0065] Specifically, the first flexible pressure strip 19 and the second flexible pressure strip 20 can be made of rubber. When the first bag clamping arm 17 and the second bag clamping arm 18 are closed, the first flexible pressure strip 19 and the second flexible pressure strip 20 clamp the side wall of the hopper 3 at the discharge port 5, thereby fixing the opening of the bag between the side wall of the hopper 3 at the discharge port 5 and the first flexible pressure strip 19 and the second flexible pressure strip 20.

[0066] In some embodiments, the lower end of the bracket 1 is provided with a base 28.

[0067] In some embodiments, the hopper 3 is funnel-shaped, and the diameter of the inlet 4 is larger than the diameter of the outlet 5.

[0068] The working process of the automatic bag clamping machine provided in this application is as follows:

[0069] 1. Initial / Release State:

[0070] The piston rod 7 of cylinder 6 is in the extended position.

[0071] Through the linkage of the first connecting rod 11, the second connecting rod 12 and their support arms, as well as the third and fourth connecting rods 16, the first bag clamping arm 17 and the second bag clamping arm 18 are driven to open outward to form a sufficiently large opening.

[0072] The flexible pressure strip is separated from the side wall of the hopper.

[0073] 2. Bagging operation:

[0074] The worker places the opening of the packaging bag over the outside of the discharge port 5 of the hopper 3.

[0075] 3. Clamping operation:

[0076] The worker operates the pneumatic switch 22 by turning the handle 23.

[0077] When the pneumatic switch 22 is activated, compressed air enters the rodless chamber (or corresponding chamber) of the cylinder 6 through the second air pipe 25, driving the piston rod 7 to retract.

[0078] The piston rod 7 retracts, pulling the upper end of the first connecting rod 11, while the cylinder housing 6 pushes the upper end of the second connecting rod 12.

[0079] Supported by the first arm 13 (rotating around the first connecting plate 26) and the second arm 14 (rotating around the first connecting plate 26), the lower ends of the first connecting rod 11 and the second connecting rod 12 respectively drive one end of the first bag clamping arm 17 and the second bag clamping arm 18 to rotate inward.

[0080] At the same time, the upper ends of the third connecting rod 15 and the fourth connecting rod 16 rotate around the second connecting plate 27, and their lower ends drive the other ends of the first bag clamping arm 17 and the second bag clamping arm 18 to rotate inward synchronously.

[0081] The two bag clamping arms move towards the center synchronously and in parallel, causing the first flexible pressure strip 19 and the second flexible pressure strip 20 on their inner sides to press tightly against the side wall of the hopper 3 at the discharge port 5.

[0082] The flexible strip undergoes elastic deformation, firmly and sealingly "hugging" the opening of the packaging bag between the outer wall of the discharge port 5 of the hopper 3 and the strip.

[0083] 4. Filling materials:

[0084] The material enters from the inlet 4 above the hopper 3, is collected by the funnel-shaped hopper body, and is smoothly poured into the clamped packaging bag from the outlet 5.

[0085] 5. Loosen the bag:

[0086] After filling is completed, the worker will once again turn the pneumatic switch 22 handle 23 to the released position.

[0087] When the pneumatic switch 22 reverses, compressed air enters the rod chamber (or corresponding chamber) of the cylinder 6 through the first air pipe 24, driving the piston rod 7 to extend.

[0088] Under the reverse linkage of the linkage mechanism, the first bag clamping arm 17 and the second bag clamping arm 18 open outwards simultaneously, and the flexible pressure strip leaves the wall of the hopper 3.

[0089] Workers can easily remove the packaging bags filled with materials.

[0090] Cycle: Repeat steps 2-5 to fill the next bag.

[0091] Working principle:

[0092] The core working principle of this automatic bag clamping machine is based on the motion conversion and force amplification of pneumatic drive and parallel four-bar linkage:

[0093] Its power source is cylinder 6, which provides the power for linear reciprocating motion. The movement of cylinder 6 is manually controlled by pneumatic switch 22 via handle 23. The extension and retraction of piston rod 7 are achieved by switching the air intake path (via first air pipe 24 or second air pipe 25).

[0094] Motion conversion and amplification are the core of this mechanism. This is mainly composed of a first connecting rod 11 (with a first support arm 13), a second connecting rod 12 (with a second support arm 14), a third connecting rod 15, a fourth connecting rod 16, and a first connecting plate 26 (for the support arm rotation) and a second connecting plate 27 (for the rotation of the third and fourth rods) on the mounting platform 2, forming a precise planar linkage system. The conversion principle is as follows: the linear motion (retraction or extension) of the piston rod 7 of the cylinder 6 is transmitted to the upper ends of the first connecting rod 11 and the second connecting rod 12 via the connecting shaft. Since the middle parts of the first and second connecting rods 12 are hinged to the fixed first connecting plate 26 through their respective support arms, they essentially form levers with this hinge point as the fulcrum. The movement of the piston rod 7 drives these two levers to rotate synchronously in opposite directions around their fulcrum (when the piston rod 7 retracts, the lower ends of the two levers swing inward; when extended, they swing outward). The key to maintaining parallelism lies in the third connecting rod 15 and the fourth connecting rod 16. Their upper ends are hinged to the second connecting plate 27, and their lower ends are connected to the other ends of the two bag-clamping arms, respectively. These two rods, together with the first and second connecting rods 12, constrain the movement of the two bag-clamping arms, ensuring they maintain a nearly parallel posture throughout the opening and closing process. This is similar to the motion principle of a parallelogram and is the core of achieving a uniform distribution of clamping force. The entire linkage mechanism also produces a significant force-amplifying effect, cleverly converting the relatively small stroke and moderate thrust of the piston rod 7 of cylinder 6 into a larger opening and closing displacement and a greater clamping force required at the end of the bag-clamping arms, sufficient to overcome the deformation resistance of the flexible pressure strip and the force required to hold the packaging bag.

[0095] Meanwhile, the flexible clamping and sealing functions are achieved by key components. The arc-shaped design of the bag clamping arm allows it to effectively surround the discharge port 5, providing circumferential constraint. The flexible pressure strip (such as one made of rubber) is fixed at both ends to the bag clamping arm. When the bag clamping arm closes, the pressure strip is forced against the rigid sidewall of the hopper 3. The pressure strip then undergoes elastic deformation. This deformation, on the one hand, fills all the microscopic gaps between the bag opening, the pressure strip, and the hopper wall, achieving a reliable seal against leakage; on the other hand, the uniformly distributed rebound force it generates provides a stable clamping force. This design allows it to adapt to the bag opening thickness and local unevenness, while effectively avoiding the risk of bag breakage that may be caused by rigid clamping.

[0096] Finally, the material guiding function is achieved by the funnel-shaped hopper 3 (whose inlet 4 diameter is larger than the outlet 5 diameter). It uses gravity to allow the material to naturally converge and flow smoothly out of the outlet 5 into the packaging bag that has been clamped below.

[0097] Note that, unless otherwise explicitly stated, all features disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by alternative features for achieving the same, equivalent, or similar purpose. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features. Where used, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments, the combination of which with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment constitutes yet another embodiment.

[0098] In the implementation of functions and steps, the corresponding functions and steps in the various embodiments may occur in a different order than those shown. For example, two consecutive functions and steps may actually be executed or implemented substantially in parallel, and they may sometimes be executed or implemented in reverse order, depending on the functions involved.

[0099] Although this application has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this application fall within the scope of protection claimed in this application.

Claims

1. An automatic bag gripper, characterized in that, include: The components include a bracket, mounting platform, hopper, cylinder, first connecting rod, second connecting rod, third connecting rod, fourth connecting rod, first bag clamping arm, and second bag clamping arm. The mounting platform is located at the upper end of the bracket, and the hopper is located in the middle of the mounting platform. The opening of the hopper above the mounting platform is the inlet, and the opening of the hopper below the mounting platform is the outlet. The first bag clamping arm and the second bag clamping arm are respectively disposed on both sides of the discharge port, and the first bag clamping arm and the second bag clamping arm are arc-shaped, surrounding the side wall of the hopper at the discharge port. The inner sides of the first bag clamping arm and the second bag clamping arm are respectively provided with a first flexible pressure strip and a second flexible pressure strip. The two ends of the first flexible pressure strip are respectively connected to the two ends of the first bag clamping arm, and the two ends of the second flexible pressure strip are respectively connected to the two ends of the second bag clamping arm. The piston rod of the cylinder is rotatably connected to the upper end of the first connecting rod, the lower end of the first connecting rod is connected to one end of the first bag clamping arm, the housing of the cylinder is rotatably connected to the upper end of the second connecting rod, the lower end of the second connecting rod is connected to one end of the second bag clamping arm, a first support arm is provided in the middle of the first connecting rod, the end of the first support arm is rotatably connected to the mounting platform, and the rotation axis is perpendicular to the piston rod; a second support arm is provided in the middle of the second connecting rod, the end of the second support arm is rotatably connected to the mounting platform, and the rotation axis is perpendicular to the piston rod. The upper ends of the third and fourth connecting rods are rotatably connected to the mounting platform, and the rotation axis is perpendicular to the piston rod. The lower ends of the third and fourth connecting rods are respectively connected to the other ends of the first and second bag clamping arms.

2. The automatic bag clamping machine according to claim 1, characterized in that, The end of the piston rod is rotatably connected to one end of the first connecting shaft, and the other end of the first connecting shaft is rotatably connected to the upper end of the first connecting rod.

3. The automatic bag clamping machine according to claim 1, characterized in that, The cylinder has a connecting block at its tail end, which is rotatably connected to one end of a second connecting shaft, and the other end of the second connecting shaft is rotatably connected to the upper end of the second connecting rod.

4. The automatic bag clamping machine according to claim 1, characterized in that, The lower end of the mounting platform is provided with a first connecting plate and a second connecting plate. The ends of the first and second support arms are rotatably connected to the first connecting plate, and the rotation axis is perpendicular to the piston rod. The upper ends of the third and fourth connecting rods are rotatably connected to the second connecting plate, and the rotation axis is perpendicular to the piston rod.

5. The automatic bag clamping machine according to claim 1, characterized in that, The mounting platform is equipped with a pneumatic switch, which has a handle. The air inlet of the pneumatic switch is connected to a first air pipe, and the air outlet of the pneumatic switch is connected to a second air pipe. The other end of the second air pipe is connected to the cylinder body of the cylinder.

6. The automatic bag clamping machine according to claim 1, characterized in that, The two ends of the first flexible pressure strip and the second flexible pressure strip are respectively fixedly connected to the two ends of the first bag clamping arm and the second bag clamping arm by connecting bolts.

7. The automatic bag clamping machine according to claim 1, characterized in that, The lower end of the bracket is provided with a base.

8. The automatic bag clamping machine according to claim 1, characterized in that, The hopper is funnel-shaped, and the diameter of the inlet is larger than the diameter of the outlet.

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