Double-clamping-plate bag clamping device

Abstract

The utility model relates to a double-clamping-plate bag clamping device, and relates to the field of powder bag feeding machines. According to the technical scheme, the structure is ingenious and reasonable, and the clamping positions of the small clamping plate and the large clamping plate are matched with the bag opening of the bag by arranging the first and second hinge seats, the first and second cylinders and the first and second hinge connecting rods. Under the condition, the air cylinder drives the hinged connecting rod to drive the clamping plate to act, accurate clamping of a bag opening can be achieved, a full-automatic powder packaging machine adopting the bag clamp can remarkably improve the packaging quality only by low cost, the packaging success rate is increased to be close to 98%, the bagging problem of a powder bagging machine is fundamentally solved, and the packaging efficiency is improved. The automatic degree and reliability of packaging are improved, manual intervention is reduced, powder leakage is effectively avoided, and an efficient and stable solution is provided for the field of powder packaging.

Description

TECHNICAL FIELD

[0001] The utility model relates to powder bagging machine technical field, especially in kind of double clamping plate bag clamp device. BACKGROUND

[0002] In the debugging production practice of powder bagging machine, the traditional single clamping plate bag clamp exposes significant problems. When using single clamping plate bag clamp, the bagging manipulator can be loosened only after the single clamping plate clamps the bag opening, otherwise the bag will fall off. Specifically, while the single clamping plate clamps the bag opening, the bag will slide in the bagging manipulator. Since the bagging manipulator and the bag need to be clamped (otherwise it is easy to fall off during movement), and the contact surface between the bagging manipulator and the bag is usually designed in a sawtooth shape to increase static friction, if the bag slides in the bagging manipulator, it is easy to cause the bag opening to tear, or to form internal resistance between the bagging manipulator and the single clamping plate through the bag, resulting in bagging failure. In addition, the length of the bag opening between the two ends of the bagging manipulator changes greatly before and after the single clamping plate clamps it, and the stretchability of packaging bags in the powder, feed, plastic, seed and other industries cannot meet such a large length change. Therefore, reducing the value of A is the key to fundamentally improving the bagging success rate.

[0003] In view of the application of the device in the powder field, in order to ensure good sealing and avoid powder spraying from the bag opening during discharge packaging, the length of the single clamping plate needs to enclose the discharge opening as much as possible, which cannot reduce the value of A by reducing the length of the single clamping plate as in the treatment of granular materials. Through in-depth analysis and observation, the double clamping plate bag clamp device is designed to solve the above-mentioned contradictions. SUMMARY

[0004] The purpose of the utility model is to provide a double clamping plate bag clamp device to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] A double clamping plate bag clamp device, comprising a bag clamp body, the top of the bag clamp body is an inlet, the bottom of the bag clamp body is a discharge port, the double clamping plate bag clamp device further comprises:

[0007] A first hinge seat is installed on the bag clamp body, which has an inner hinge end on the side close to the bag clamp body and an outer hinge end on the side away from the bag clamp body;

[0008] A first air cylinder is hingedly installed on the inner hinge end of the first hinge seat;

[0009] A second hinge seat is installed on the bag clamp body below the first hinge seat;

[0010] A first articulated connecting rod, the top end of which is articulated with the telescopic end of the first cylinder, the middle end of which is articulated with the second articulated seat, and the bottom end of which is provided with a small clamp plate;

[0011] A second cylinder, which is articulatedly installed on the outer articulated end of the first articulated seat;

[0012] A third articulated seat, which is installed on the bag clamp body and is located below the second articulated seat; and

[0013] A second articulated connecting rod, the top end of which is articulated with the telescopic end of the second cylinder, the middle end of which is articulated with the third articulated seat, and the bottom end of which is provided with a large clamp plate;

[0014] Wherein, the bag is sleeved on the discharge port of the bag clamp body, and the clamping positions of the small clamp plate and the large clamp plate match the bag opening of the bag.

[0015] In a possible implementation, the bottom end of the second articulated connecting rod is further provided with a contact switch for detecting whether the large clamp plate clamps the bag opening of the bag.

[0016] In a possible implementation, the top end of the first articulated connecting rod is articulated with the telescopic end of the first cylinder through cooperation of a rod end joint bearing, a pin shaft and a split pin.

[0017] In a possible implementation, the middle end of the first articulated connecting rod is articulated with the second articulated seat through cooperation of a self-lubricating radial joint bearing and a bolt shaft.

[0018] In a possible implementation, the top end of the second articulated connecting rod is articulated with the telescopic end of the second cylinder through cooperation of a rod end joint bearing, a pin shaft and a split pin.

[0019] In a possible implementation, the middle end of the second articulated connecting rod is articulated with the third articulated seat through cooperation of a self-lubricating radial joint bearing and a bolt shaft.

[0020] In a possible implementation, the small clamp plate is a polyurethane clamp plate.

[0021] In a possible implementation, the large clamp plate is a polyurethane clamp plate.

[0022] The technical scheme provided by the utility model has at least the following beneficial effects:

[0023] This technical solution features a clever and rational structure. By setting up first and second hinge seats, first and second cylinders, and first and second hinge connecting rods, the clamping positions of the small and large clamping plates are matched with the bag opening. In this configuration, the cylinders drive the hinge connecting rods to move the clamping plates, achieving precise clamping of the bag opening. Fully automatic powder packaging machines using this bag clamp can significantly improve packaging quality with minimal cost, achieving a packaging success rate of nearly 98%. This fundamentally solves the bagging problem in powder bagging machines, enhances the automation and reliability of packaging, reduces manual intervention, effectively prevents powder leakage, and provides an efficient and stable solution for the powder packaging industry. Attached Figure Description

[0024] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0025] Figure 1 A schematic diagram of the structure of a double-clamp bag clamp device provided in an exemplary embodiment of the present invention is shown.

[0026] Figure 2 It shows Figure 1 A schematic diagram showing the state when neither the small nor the large clamping plate is clamped in direction A.

[0027] Figure 3 It shows Figure 1 A schematic diagram of the state when the small clamping plate is used for clamping.

[0028] Figure 4 It shows Figure 1 A schematic diagram showing the state when both the small and large clamping plates are in the middle (A) direction.

[0029] In the diagram: 1. Bag clamp body; 2. First hinge seat; 3. First cylinder; 4. Second hinge seat; 5. First hinge link; 6. Small clamping plate; 7. Second cylinder; 8. Third hinge seat; 9. Second hinge link; 10. Large clamping plate; 11. Bag; 12. Contact switch; 13. Bag-making robot. Detailed Implementation

[0030] 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.

[0031] Wherein, same parts are indicated by same reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings accompanying the utility model specification, and the words "bottom" and "top", "inner" and "outer" refer to the directions towards or away from the specific parts. In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model specification, the meaning of "multiple" is two or more than two.

[0032] The utility model will be further described below in combination with the drawings and examples.

[0033] Figure 1 The structure schematic view of the double-clamping-plate bag clamping device provided by one exemplary embodiment of the utility model is shown, which comprises a bag clamping body 1, the top of the bag clamping body 1 is a feeding port, and the bottom of the bag clamping body 1 is a discharging port. The double-clamping-plate bag clamping device further comprises: a first hinged seat 2 installed on the bag clamping body 1, which has an inner hinged end on the side close to the bag clamping body 1 and an outer hinged end on the side away from the bag clamping body 1; a first air cylinder 3 hingedly installed on the inner hinged end of the first hinged seat 2; a second hinged seat 4 installed on the bag clamping body 1 and below the first hinged seat 2; a first hinged connecting rod 5, the top end of which is hingedly connected with the telescopic end of the first air cylinder 3, the middle end of which is hingedly connected with the second hinged seat 4, and the bottom end of which is installed with a small clamping plate 6; a second air cylinder 7 hingedly installed on the outer hinged end of the first hinged seat 2; a third hinged seat 8 installed on the bag clamping body 1 and below the second hinged seat 4; and a second hinged connecting rod 9, the top end of which is hingedly connected with the telescopic end of the second air cylinder 7, the middle end of which is hingedly connected with the third hinged seat 8, and the bottom end of which is installed with a large clamping plate 10; wherein, a bag 11 is sleeved on the discharging port of the bag clamping body 1, and the clamping positions of the small clamping plate 6 and the large clamping plate 10 match the bag opening of the bag 11.

[0034] In the embodiment of the present application, the bag clamp body 1 serves as a bearing base, the feeding port and the discharging port are respectively used for powder input and bag 11 sleeving; the first hinge seat 2 is connected with the first cylinder 3 and the second cylinder 7 through inner and outer hinge ends, forming a double power source support structure; the first cylinder 3 drives the first hinge connecting rod 5 to rotate around the second hinge seat 4, and drives the small clamp plate 6 to clamp the upper part of the bag opening; the second cylinder 7 drives the second hinge connecting rod 9 to act around the third hinge seat 8 through the outer hinge end, so that the large clamp plate 10 is clamped for the second time below the small clamp plate. The double hinge connecting rod structure is designed through a layered clamping point, and the accurate driving force of the cylinder extension is used to accurately match the size of the clamp plate and the bag opening position, and the stable clamping and release of the flexible bag opening are realized through mechanical linkage, thereby providing a reliable mechanical foundation for full-automatic packaging.

[0035] Further, the bottom end of the second hinge connecting rod 9 is also provided with a contact switch 12, which is used to detect whether the large clamp plate 10 clamps the bag opening of the bag 11.

[0036] In the embodiment of the present application, when the second hinge connecting rod 9 drives the large clamp plate 10 to act downward, the contact switch 12 moves synchronously with the connecting rod and approaches the bag opening area. If the large clamp plate 10 successfully clamps the bag opening of the bag 11, the contact switch 12 triggers a signal due to extrusion or displacement, and feeds back to the control system (PLC or MCU) of the powder bagging machine in real time, confirms that the bag clamping action is completed, and thus allows the subsequent procedures such as discharging and sealing to start; if the clamping signal is not detected, the control system of the powder bagging machine can automatically trigger an alarm or pause the process, avoiding abnormal situations such as empty clamping and missed clamping. Through the accurate electrical feedback mechanism, the design ensures the reliability of the cooperative action of the double clamp plates, improves the automatic closed-loop control capability of the packaging process, effectively reduces the manual intervention and reduces the risk of misoperation, and further guarantees the packaging success rate and the equipment operation stability.

[0037] Further, the top end of the first hinge connecting rod 5 is hinged with the extension end of the first cylinder 3 through the cooperation of the rod end joint bearing, the pin shaft and the split pin; the middle end of the first hinge connecting rod 5 is hinged with the second hinge seat 4 through the cooperation of the self-lubricating radial joint bearing and the bolt shaft. The top end of the second hinge connecting rod 9 is hinged with the extension end of the second cylinder 7 through the cooperation of the rod end joint bearing, the pin shaft and the split pin; the middle end of the second hinge connecting rod 9 is hinged with the third hinge seat 8 through the cooperation of the self-lubricating radial joint bearing and the bolt shaft.

[0038] In this embodiment, the combination of the rod end spherical bearing with the pin and cotter pin allows the hinge point to swing flexibly within a certain angle, adapting to changes in the motion trajectory during cylinder extension and retraction. The anti-disengagement design of the cotter pin ensures reliable connection and prevents loosening during movement. The cooperation between the self-lubricating radial spherical bearing and the bolt shaft forms a low-friction rotational fulcrum at the middle of the hinged connecting rod, allowing it to withstand radial loads without additional lubrication, reducing mechanical wear and improving transmission efficiency. The synergistic application of these two types of bearings enables the first and second hinged connecting rods to achieve smooth reciprocating motion under cylinder drive, accurately transmitting clamping force.

[0039] It is worth mentioning that both the small clamp 6 and the large clamp 10 are polyurethane clamps. Polyurethane has high elasticity, wear resistance, and tear resistance. When in contact with the flexible bag opening, it can fit tightly against the edge of the bag opening through moderate deformation, avoiding the bag damage or scratches caused by rigid contact with traditional metal clamps. Its high surface friction coefficient can provide stable clamping force while reducing slippage. In addition, polyurethane material is corrosion-resistant and anti-aging, and can adapt to the dust erosion that may exist in the powder packaging environment, extending the service life of the clamps.

[0040] Next, the working principle of a double-clamp bag clamping device involved in the embodiments of this utility model will be explained.

[0041] Figure 2 It shows Figure 1 A schematic diagram showing the state when neither the small nor the large clamping plate in direction A is clamped. Figure 3 It shows Figure 1 A schematic diagram showing the state when the middle A is clamped by the small clamping plate. Figure 4 It shows Figure 1 A schematic diagram showing the state when both the small and large clamping plates are used in direction A. Specifically:

[0042] First, the bag 11 is precisely transported by the bagging robot 13 to the discharge port (bag clamp opening) at the bottom of the bag clamp body 1 for positioning;

[0043] Secondly, the first cylinder 3 drives the small clamping plate 6 to move upward, stably clamping the bag opening area of ​​the bag 11. Then the bagging robot 13 releases and withdraws. At this time, except for the part clamped by the small clamping plate 6, the rest of the bag 11 is in a natural hanging state, avoiding the stretching and deformation of the bag body caused by a single clamping point.

[0044] Next, the second cylinder 7 drives the large clamping plate 10 to simultaneously clamp the bag opening at a preset position below the small clamping plate 6, forming a stepped clamping structure with upper and lower clamping plates. This design, through the synergistic effect of the two clamping plates, completely eliminates the antagonistic force between the clamping plate and the bagging robot in the traditional single clamping plate mode, making the bag clamping process more in line with the mechanical properties of flexible packaging materials and significantly improving clamping stability.

[0045] In a specific application example, for the same type of bag with a standard bag opening length of 474mm between the two ends of the bag-feeding robot, the change in bag opening length A between the two ends of the bag-feeding robot during the traditional single-clamp bag-feeding process reaches 82mm (556mm-474mm), indicating that the bag body bears a large tensile force due to a single clamping point. However, when using this double-clamp device, when the smaller clamp clamps the bag opening first and the bag-feeding robot has not yet released, the change in bag opening length B between the two ends of the bag-feeding robot is only 12mm (486mm-474mm), which is 70mm lower than the traditional solution. Combined with the material properties of flexible packaging bags, this slight deformation can ensure the bag opening is fixed and avoid damage or insecure clamping caused by excessive stretching, thus completely solving the technical bottleneck of single-clamp bag-feeding from a mechanical perspective.

[0046] In summary, this technical solution features a clever and reasonable structure. By setting up first and second hinge seats, first and second cylinders, and first and second hinge connecting rods, the clamping positions of the small and large clamping plates are matched with the bag opening. In this configuration, the cylinders drive the hinge connecting rods to move the clamping plates, achieving precise clamping of the bag opening. Fully automatic powder packaging machines using this bag clamp can significantly improve packaging quality with minimal cost, achieving a packaging success rate of nearly 98%. This fundamentally solves the bagging problem in powder bagging machines, enhances the automation and reliability of packaging, reduces manual intervention, effectively prevents powder leakage, and provides an efficient and stable solution for the powder packaging industry.

[0047] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A double-clamp bag clamping device, comprising a bag clamping body (1), wherein the top of the bag clamping body (1) is a feed inlet and the bottom of the bag clamping body (1) is a discharge outlet, characterized in that, The double-clamp bag clamp device also includes: The first hinge seat (2) is mounted on the bag clip body (1), and has an inner hinge end on the side close to the bag clip body (1) and an outer hinge end on the side away from the bag clip body (1). The first cylinder (3) is hingedly mounted on the inner hinge end of the first hinge seat (2); The second hinge seat (4) is mounted on the bag clip body (1) and located below the first hinge seat (2); The first hinged connecting rod (5) has its top end hinged to the telescopic end of the first cylinder (3), its middle end hinged to the second hinge seat (4), and its bottom end is fitted with a small clamping plate (6). The second cylinder (7) is hingedly mounted on the outer hinge end of the first hinge seat (2); The third hinge seat (8) is mounted on the bag clip body (1) and located below the second hinge seat (4); and The second hinged connecting rod (9) has its top end hinged to the telescopic end of the second cylinder (7), its middle end hinged to the third hinge seat (8), and its bottom end is fitted with a large clamping plate (10). The bag (11) is fitted onto the outlet of the bag clamp body (1), and the clamping positions of the small clamp (6) and the large clamp (10) are matched with the opening of the bag (11).

2. The double-clamp bag clamping device according to claim 1, characterized in that, The bottom end of the second hinge link (9) is also equipped with a contact switch (12), which is used to detect whether the large clamp (10) is holding the opening of the bag (11).

3. The double-clamp bag clamping device according to claim 1, characterized in that, The top end of the first hinged connecting rod (5) is hinged to the telescopic end of the first cylinder (3) through the cooperation of the rod end joint bearing, the pin, and the cotter pin.

4. The double-clamp bag clamping device according to claim 1, characterized in that, The middle end of the first hinge link (5) is hinged to the second hinge seat (4) through the cooperation of a self-lubricating radial joint bearing and a bolt shaft.

5. The double-clamp bag clamping device according to claim 1, characterized in that, The top end of the second hinged link (9) is hinged to the telescopic end of the second cylinder (7) through the cooperation of the rod end joint bearing, the pin, and the cotter pin.

6. The double-clamp bag clamping device according to claim 1, characterized in that, The middle end of the second hinge link (9) is hinged to the third hinge seat (8) through the cooperation of a self-lubricating radial joint bearing and a bolt shaft.

7. The double-clamp bag clamping device according to claim 1, characterized in that, The small splint (6) is a polyurethane splint.

8. The double-clamp bag clamping device according to claim 1, characterized in that, The large plywood (10) is a polyurethane plywood.

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