Bag opening assembly for vacuumizing packaging bag

Abstract

The utility model belongs to the field of packaging bag vacuumizing, and discloses a bag opening assembly for packaging bag vacuumizing, which comprises clamping pieces arranged in pairs and a driving mechanism for driving the clamping pieces to open and close. The whole clamping piece is of an arch structure with the span capable of elastically changing, and the two ends of the arch structure are each provided with a clamping part used for clamping the side edge of a packaging bag. According to the utility model, the clamping parts can drive the side edges on the two sides of the packaging bag to be straightened along the width direction through the elastic deformation of the clamping pieces, so that the situation that the areas on the two sides of a block-shaped material are pressed together to form sealing due to the action of negative pressure can be avoided; according to the packaging bag opening device, air in the areas on the two sides of a packaging bag block-shaped material is difficult to be effectively emptied and pumped out, a plurality of bag opening stations are formed, the multiple stations conduct bag opening under the driving mode of relative overturning movement of the driving mechanism, batch processing is achieved, and the processing efficiency of the packaging bag is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuuming packaging bags, and in particular relates to a bag-supporting component used for vacuuming packaging bags. Background Art

[0002] The bag packaging machine is a packaging equipment that integrates multiple functions such as bag loading, unloading, vacuuming, sealing, and bag unloading. Food and other materials can be loaded into the packaging bag through unloading. After loading, the bag will be transported to the vacuuming station, where vacuuming is performed through a vacuum straw and a clamp that keeps the packaging bag relatively fixed.

[0003] In the prior art, a small-caliber flat-mouthed vacuum nozzle or vacuum straw is usually inserted into the middle of the bag opening of the packaging bag to perform vacuum extraction. However, when the packaging bag is filled with bulk materials, the air is mainly concentrated on both sides of the bulk materials (that is, the sides of the packaging bag). During the vacuum extraction process, the negative pressure will cause the bag walls on both sides of the packaging bag to fit together to form a seal, especially near the mouth of the vacuum nozzle, where the bag walls are more likely to fit together and form a seal, making it difficult to effectively extract and empty the air in the packaging bag, affecting the vacuum degree and thus the storage time of the material. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a bag support assembly for vacuuming a packaging bag, so as to solve the problem that the bag wall will be tightly sealed near the suction nozzle during the vacuum process of the packaging bag and the air in the lower part of the bag cannot be extracted.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A bag support assembly for vacuuming a packaging bag, comprising clamping pieces arranged in pairs and a driving mechanism for driving the clamping pieces to perform opening and closing actions;

[0007] The clamping piece is in the form of an arched structure with an elastically variable span as a whole, and both ends of the arched structure are respectively provided with clamping portions for clamping the sides of the packaging bag.

[0008] Through the above technical solution, two clamping parts driven by a driving mechanism to separate and close are used, and the distance between the clamping parts at both ends of the arch is increased through the elastic deformation of the arch to straighten the packaging bag, so that the two sides of the packaging bag can be tightened and straightened to achieve the bag support, avoiding the packaging bag on both sides of the bulk material area being pressed together due to negative pressure to form a seal, resulting in the air in the area on both sides of the bulk material of the packaging bag being difficult to effectively evacuate. The clamping parts with an arch structure can not only facilitate the avoidance of materials, but also facilitate the elastic movement of the clamping parts at both ends along the span direction.

[0009] In a possible implementation, the clamping piece is an integral structure.

[0010] Through the above technical solution, the integrated clamping piece has a compact structure, good stability, and is more convenient to assemble and disassemble, and can better utilize the elastic deformation of the arch structure to support the bag.

[0011] In a possible implementation, the clamping part is a sheet metal part formed by bending.

[0012] Through the above technical solution, the clamping parts of the sheet metal parts can be easily bent and processed, and can also have good elasticity.

[0013] In a possible implementation, the clamping portion is connected to a resistance-enhancing pad for contacting the packaging bag.

[0014] Through the above technical solution, a resistance-increasing pad is provided at the clamping part of the clamping member, and the friction between the clamping part and the packaging bag can be increased by the resistance-increasing pad, so that the packaging bag can be better straightened in the span direction through elastic deformation during the clamping process, making the bag-supporting more effective.

[0015] In a possible implementation, a clamping hole is provided on the clamping portion;

[0016] The resistance-enhancing pad comprises a pad portion and a columnar connecting portion passing through the clamping hole, and the columnar connecting portion is provided with a flexible clamping protrusion which cooperates with the clamping hole in a limiting manner.

[0017] Through the above technical solution, a drag-increasing pad with a columnar connecting part is adopted. The columnar connecting part has a flexible snap-fitting protrusion that can be elastically deformed. The elastic deformation can facilitate the columnar connecting part to pass through the snap hole and cooperate with the snap hole to limit the position, thereby realizing the installation of the drag-increasing pad and making disassembly easier. Therefore, the use of such a drag-increasing pad makes its connection with the clamping part more convenient and quicker.

[0018] In a possible implementation, the clamping members are arranged in pairs at intervals along the depth direction of the packaging bag.

[0019] Through the above-mentioned technical scheme, several pairs of clamping parts can respectively clamp different parts of the packaging bag in the depth direction, so that the sides of the packaging bag can be more effectively straightened during the bag-stretching process, thereby better avoiding the situation where the bag wall of the packaging bag is sealed under the action of external atmospheric pressure.

[0020] In a possible implementation, the driving mechanism drives the two clamping members in a pair to perform a relative linear motion or a relative deflection motion to open and close.

[0021] Through the above-mentioned technical scheme, the clamping parts can be driven by the driving mechanism to perform a closing and opening action of relative linear motion or relative deflection motion, thereby clamping the two side edges of the packaging bag and performing a bag-supporting action. Different motion driving modes can be selected so that the clamping parts can perform closing and opening actions.

[0022] In a possible implementation, the clamping members arranged in pairs are arranged in several groups along an arrangement direction to form parallel multi-stations.

[0023] Through the above technical solution, a plurality of bag-holding stations can be formed, and the plurality of bag-holding stations are driven by the driving mechanism to hold the bag, thereby realizing batch processing and improving the processing efficiency of the packaging bags.

[0024] In a possible implementation, the driving mechanism includes a linkage mechanism and a driving assembly transmission-connected to the linkage mechanism; the clamping members forming multiple parallel stations are connected to the linkage mechanism to drive the clamping members of all stations to perform opening and closing actions synchronously.

[0025] Through the above technical solution, the driving mechanism can realize the synchronous driving of multiple workstations through the linkage mechanism, and then the clamping parts of all workstations can realize the synchronous bag-holding action, thereby improving the work efficiency of batch processing. The linkage mechanism can also avoid the problem of complex structure and high cost caused by the need to configure multiple sets of driving mechanisms for driving.

[0026] In a possible implementation, the linkage mechanism includes two rotating shafts parallel to the arrangement direction, positioning shafts located below the two rotating shafts and parallel to each other, and a plurality of paired mounting arms respectively connected to each pair of clamping parts, wherein the positioning shaft is rotationally connected to the two mounting arms of each group at the same time, and the middle parts of the mounting arms located on the same side are connected through a linkage shaft, and the driving assembly is used to drive the two rotating shafts to perform synchronous forward and reverse rotation around their own axes; each of the rotating shafts is respectively fixed with a swing arm corresponding to each group of clamping parts on the same side, and each swing arm is respectively connected to the linkage shaft through a connecting rod, and both ends of the connecting rod are rotationally connected to the swing arm and the linkage shaft.

[0027] Through the above-mentioned technical solution, the linkage mechanism, under the drive of the driving component, can use the driving mode of relative deflection motion to make the clamping parts flip from top to bottom and perform synchronous separation and closing actions. This can not only achieve synchronous driving, but also reduce the occupancy of the lower space, and thus can be more conducive to the arrangement of other mechanisms and the design is more reasonable.

[0028] In a possible implementation, the drive assembly includes a drive component and a transmission component, wherein the transmission component is provided with two groups and is respectively installed at both ends of two rotating shafts, the transmission component includes two mutually meshing gears and a transmission wheel coaxially fixed with one of the gears, each gear is respectively fixedly connected to one of the rotating shafts, and the transmission wheel is connected to the drive component through a transmission member.

[0029] Through the above technical solution, the two gears respectively connected to the rotating shaft can perform synchronous forward and reverse rotation when being transmitted through mutual meshing, thereby enabling the two clamping parts connected to the rotating shaft through transmission structures such as swing arms, connecting rods, and mounting arms to move relative to each other synchronously, making the clamping more accurate, and enabling the driving of multiple groups of clamping components through one driving component, thereby reducing equipment costs.

[0030] In a possible implementation, the driving mechanism also includes a plurality of positioning plates spaced apart along the arrangement direction, each positioning plate is simultaneously connected by the two rotating shafts and the positioning shaft, and the positioning plate and the rotating shaft are rotatably matched; both ends of the rotating shaft are also rotatably connected with mounting plates, and the mounting plates are parallel to the positioning plates.

[0031] Through the above technical solution, the two rotating shafts and the positioning shaft can be relatively fixed by multiple positioning plates, so that they are connected as a whole, and the installation and fixation of the whole can be facilitated by the mounting plates on both sides, which is more convenient and the structural design is more reasonable.

[0032] Compared with the prior art, the utility model has the following beneficial effects:

[0033] The bag-stretching assembly for vacuuming a packaging bag of the utility model can, through the elastic deformation of the clamping parts, drive the side edges of the packaging bag on both sides to be straightened in the width direction by the clamping parts, thereby preventing the areas on both sides of the bulk material of the packaging bag from being pressed together to form a seal due to the negative pressure, which makes it difficult to effectively evacuate and extract the air in the areas on both sides of the bulk material of the packaging bag, and a plurality of bag-stretching stations are formed, and the plurality of stations carry out bag-stretching under the driving mode of the relative turning motion of the driving mechanism, thereby realizing batch processing and improving the processing efficiency of the packaging bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A three-dimensional view of a clamping member of a bag support assembly for vacuuming a packaging bag;

[0035] Figure 2 A practical schematic diagram of a clamping part of a bag-supporting assembly for vacuuming a packaging bag when clamping the packaging bag;

[0036] Figure 3 for Figure 2 A three-dimensional view of the vacuum nozzle used in the embodiment;

[0037] Figure 4 It is a schematic structural diagram of a clamping part of a bag support assembly for vacuuming a packaging bag when a resistance-enhancing pad is installed;

[0038] Figure 5 It is a schematic structural diagram of a clamping piece of a bag support assembly used for vacuuming a packaging bag when it is connected to a mounting arm;

[0039] Figure 6 A three-dimensional view from a first perspective of a plurality of clamping assemblies of a bag-supporting assembly for vacuuming a packaging bag connected to a driving mechanism through a mounting arm;

[0040] Figure 7 A stereoscopic view from a second perspective of a plurality of clamping assemblies of a bag support assembly for vacuuming a packaging bag connected to a driving mechanism through a mounting arm;

[0041] Figure 8 for Figure 7 A partial enlarged schematic diagram of part A.

[0042] In the figure: 1-sucking nozzle component; 11-suction tube; 12-suction port; 2-packaging bag; 21-bag opening; 3-clamping piece; 31-clamping part; 32-clamping hole; 4-block material; 5-resistance-increasing pad; 51-pad part; 52-columnar connecting part; 53-flexible clamping protrusion; 6-mounting arm; 7-driving mechanism; 71-rotating shaft; 72-swing arm; 73-connecting rod; 74-linkage shaft; 75-driving component; 76-gear; 77-positioning plate; 78-mounting plate; 79-positioning shaft. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0044] Figure 1 It is a three-dimensional view of a clamping member 3 of a bag-supporting assembly for vacuuming a packaging bag 2, and the figure mainly shows the movement direction of a pair of clamping members 3 when performing the separation and combination action; Figure 2 This is a practical principle diagram of a bag-stretching assembly for vacuuming a packaging bag 2, in which the clamping parts 3 are clamping the packaging bag 2. The diagram mainly shows the state in which the two pairs of clamping parts 3 jointly squeeze the two sides of the packaging bag 2 under the clamping action to stretch the bag toward both sides so as to draw a vacuum through the vacuum nozzle and other components inserted into the bag opening 21.

[0045] Please refer to Figure 1 and Figure 2As shown, an embodiment of the present application provides a bag-supporting assembly for vacuuming a packaging bag 2, comprising clamping members 3 arranged in pairs and a driving mechanism 7 for driving the clamping members 3 to perform separation and combination actions; the clamping members 3 are overall in the form of an arched structure with an elastically variable span, and both ends of the arched structure respectively have clamping portions 31 for clamping the sides of the packaging bag 2.

[0046] Among them, the pair of clamping members 3 can be clamped on both sides of the packaging bag 2, and the clamping parts 31 at both ends can contact the sides of the packaging bag 2. By designing the clamping member 3 as an arched structure, the clamping parts 31 at both ends can be displaced in the longitudinal plane where the packaging bag 2 is located when subjected to the clamping and squeezing force brought by the driving mechanism 7, and can then drive the parts of the packaging bag 2 in contact with them to straighten and tighten, thereby preventing the areas of the packaging bag 2 on both sides of the bulk material 4 from being pressed together to form a seal due to the negative pressure. Moreover, the clamping member 3 with an arched structure can also avoid the part of the packaging bag 2 that is supported by the bulk material 4 loaded into the packaging bag 2, so as to better support the bag.

[0047] The vacuum nozzle used can be selected and configured according to actual conditions, such as a flat-mouthed nozzle or a vacuum straw. Since the two sides of the packaging bag 2 are stretched open, either of these two types can achieve a more complete vacuum, so that the two sides of the packaging bag 2 are not easily sealed by the atmospheric pressure after being stretched out.

[0048] Figure 3 for Figure 2 A three-dimensional view of the vacuum nozzle used in the embodiment of the present invention.

[0049] Preferably, the vacuum nozzle can also be used as follows Figure 2 and Figure 3 The suction nozzle structure shown is a plate-like suction nozzle component 1 with a shuttle-shaped cross-section and a suction tube 11 connected thereto. The suction nozzle component 1 is adapted to the structure of the opening 4 of the packaging bag 2 for placing bulk materials, so that it can better fit with the inner wall of the bag opening 21 and provide a certain support. The main thing is that the suction port 12 can be set on both sides of the bottom thereof, so that the two sides that are straightened can be vacuumed in a targeted manner, and the vacuuming is more effective. A branch airway connected to the suction port 12 and the suction tube 11 is set inside.

[0050] Through the above-mentioned technical scheme, the paired clamps 3 can support the packaging bag 2 on both sides of the bulk material 4 where mainly air exists, and tighten and straighten the two sides of the packaging bag 2, thereby preventing the areas of the packaging bag 2 on both sides of the bulk material 4 from being pressed together to form a seal due to negative pressure, making it difficult to effectively empty and extract the air in the areas of the packaging bag 2 on both sides of the bulk material 4.

[0051] In a preferred embodiment of the clamping member 3, the clamping member 3 is an integral structure.

[0052] The clamping member 3 of the integrated structure can better utilize the elastic deformation of the arch structure to support the bag.

[0053] On this basis, the clamping part 3 can be a sheet metal part formed by bending. The clamping part 3 of the sheet metal part can be easy to be bent and also has good elasticity.

[0054] Figure 4 It is a schematic structural diagram of a clamping part 3 of a bag-supporting assembly for vacuuming a packaging bag 2 when a resistance-enhancing pad 5 is installed. The figure mainly shows a three-dimensional structure in which a clamping part 3 is installed with a resistance-enhancing pad 5.

[0055] Please refer to Figure 4 As shown, since the clamping member 3 is made of metal material, its clamping portion 31 may slip when clamping the packaging bag 2 which is usually made of plastic, so the clamping portion 31 may also be connected to a resistance-increasing pad 5 for contacting the packaging bag 2. The resistance-increasing pad 5 can increase the friction between the clamping portion 31 and the packaging bag 2, so that the packaging bag 2 can be better straightened in the span direction through elastic deformation during the clamping process, making the bag support more effective.

[0056] Specifically, the clamping portion 31 is provided with a clamping hole 32; the resistance-increasing pad 5 includes a pad portion 51 and a columnar connecting portion 52 passing through the clamping hole 32, and the columnar connecting portion 52 is provided with a flexible clamping protrusion 53 that is limitedly matched with the clamping hole 32. The resistance-increasing pad 5 having the columnar connecting portion 52 is adopted, and the resistance-increasing pad 5 is preferably made of rubber material as a whole. The flexible clamping protrusion 53 of the columnar connecting portion 52 can be elastically deformed, and the elastic deformation can facilitate the columnar connecting portion 52 to pass through the clamping hole 32 and be limitedly matched with the clamping hole 32, so as to realize the installation of the resistance-increasing pad 5, and the disassembly is also easier. Therefore, the use of such a resistance-increasing pad 5 makes it more convenient and quick to connect it with the clamping member 3.

[0057] In some embodiments, the clamping members 3 are arranged in a plurality of pairs at intervals along the depth direction of the packaging bag 2 , and the plurality of pairs include one or more pairs.

[0058] When multiple pairs are provided, different positions of the packaging bag 2 in the depth direction can be contacted and clamped respectively, so that the sides of the packaging bag 2 can be more effectively straightened during the bag-stretching process, thereby better avoiding the situation where the bag wall of the packaging bag 2 is sealed under the action of the external atmospheric pressure.

[0059] It can be understood that in order to realize the driving of the opening and closing action of the clamping member 3, different driving modes can be selected according to actual needs. For example, by driving the paired clamping members to perform the opening and closing action of relative linear motion, such a driving mode can be to connect a group of linear driving components on the clamping members on both sides, such as linear driving components such as cylinders. For example, by driving the paired clamping members to perform the opening and closing action of relative deflection motion, such a driving mode can be realized by a structure that can realize deflection or flipping. Of course, it can also be realized by other existing mechanisms with different motion modes that can realize the driving of the opening and closing action, without limitation.

[0060] Figure 5 The figure is a schematic structural diagram of a clamping member 3 of a bag-supporting assembly for vacuuming a packaging bag 2 when connected to a mounting arm 6. The figure mainly shows that the clamping member 3 is provided with two pairs of mounting arm 6 structures respectively mounted on a driving structure for driving relative deflection motion; Figure 6 A three-dimensional view from a first perspective of a plurality of clamping assemblies of a bag-supporting assembly for vacuuming a packaging bag 2 connected to a driving mechanism 7 via a mounting arm 6; Figure 7 A three-dimensional view from a second perspective of a plurality of clamping assemblies of a bag-supporting assembly for vacuuming a packaging bag 2 connected to a driving mechanism 7 via a mounting arm 6; Figure 8 for Figure 7 A partial enlarged schematic diagram of part A.

[0061] In the embodiment of the present application, in order to realize batch bag packaging operation, in the embodiment of the present application, the clamping members 3 arranged in pairs are arranged in several groups along an arrangement direction to form parallel multi-stations.

[0062] In this way, a plurality of bag-supporting workstations can be formed, and the plurality of bag-supporting workstations can be driven by the driving mechanism to support the bag, thereby realizing batch processing and improving the processing efficiency of the packaging bags.

[0063] Based on this, combined Figure 6 As shown, in order to realize that the driving mechanism can synchronously drive each station of the parallel multi-station, the driving mechanism 7 includes a linkage mechanism and a driving component connected to the linkage mechanism; the clamping parts 3 forming the parallel multi-station are connected to the linkage mechanism to drive the clamping parts 3 of all stations to synchronously perform the opening and closing actions. In this way, the driving mechanism can realize the synchronous driving of multiple stations through the linkage mechanism, and then realize the synchronous bag-holding action of the clamping parts of all stations, which improves the work efficiency of batch processing, and can also avoid the problem of complex structure and high cost caused by the need to configure multiple sets of driving mechanisms for driving through the linkage mechanism.

[0064] Please refer to Figure 5-8As shown, in a preferred embodiment of the linkage mechanism, the linkage mechanism includes two rotating shafts 71 parallel to the arrangement direction, positioning shafts 79 located below the two rotating shafts 71 and parallel to each other, and a plurality of mounting arms in pairs respectively connected to each pair of clamping parts 3, wherein the positioning shaft 79 is rotationally connected to the two mounting arms 6 of each group at the same time, and the middle parts of the mounting arms 6 located on the same side are connected through a linkage shaft 74, and the driving assembly is used to drive the two rotating shafts 71 to perform synchronous forward and reverse rotation around their own axes; each of the rotating shafts 71 is respectively fixed with a swing arm 72 corresponding to each group of clamping parts 3 on the same side, and each swing arm 72 is respectively connected to the linkage shaft 74 through a connecting rod 73, and both ends of the connecting rod 73 are rotationally connected to the swing arm 72 and the linkage shaft 74.

[0065] In this way, the linkage mechanism, under the drive of the driving assembly, can make the clamping member 3 turn from top to bottom and perform the opening and closing action synchronously in a relative deflection motion driving mode, which can not only realize synchronous driving, but also reduce the occupation of the lower space, and thus be more conducive to the arrangement of other mechanisms and make the design more reasonable. In order to further improve the overall synchronization stability, a linkage shaft 74 can be set at the connection between the swing arm 72 and the connecting rod 73.

[0066] Specifically, under the drive of the driving component, the two rotating shafts 71 can synchronously rotate forward and reverse around their own axes, thereby driving the clamping members 3 on both sides to clamp or separate. For example, when clamping, the rotation of the rotating shaft 71 is driven by the driving component, and can drive the connecting rod 73 to be pressed down through the swing arm 72. The connecting rod 73 can make the mounting arm 6 rotate downward around the positioning axis 79, and the clamping member 3 installed on the mounting arm 6 will also deflect downward and gradually approach the two sides of the packaging bag 2 with the clamping member 3 on the opposite side, thereby realizing the clamping of the packaging bag 2. Conversely, the driving component drives the rotating shaft 71 to rotate in the opposite direction, thereby driving the clamping members 3 to move away from each other.

[0067] On this basis, in order to achieve synchronous drive, the driving assembly includes a driving component 75 and a transmission component, wherein the transmission component is provided with two groups and is respectively installed at the two ends of the two rotating shafts 71, and the transmission component includes two mutually meshing gears 76 and a transmission wheel coaxially fixed with one of the gears 76, each gear 76 is respectively fixedly connected to one of the rotating shafts 71, and the transmission wheel is connected to the driving component 75 through a transmission member. In this way, the two gears 76 respectively connected to the rotating shafts 71 can perform synchronous forward and reverse rotation when being driven by mutual meshing, thereby enabling the two clamping parts 3 connected to the rotating shafts 71 through the transmission structure such as the swing arm 72, the connecting rod 73, and the mounting arm 6 to synchronize relative movement, making the clamping more accurate, and the driving of multiple groups of clamping components can be achieved through one driving component 75, thereby reducing the equipment cost.

[0068] In the specific implementation process, the driving mechanism 7 further includes a plurality of positioning plates 77 spaced apart along the arrangement direction, each positioning plate 77 is simultaneously connected by the two rotating shafts 71 and the positioning shaft 79, and the positioning plate 77 is rotatably matched with the rotating shaft 71; the two ends of the rotating shaft 71 are also rotatably connected with mounting plates 78, and the mounting plates 78 are parallel to the positioning plates 77. The two rotating shafts 71 and the positioning shaft 79 can be relatively fixed by the plurality of positioning plates 77, so that they are connected as a whole, and the mounting plates 78 on both sides can facilitate the installation and fixation of the whole, which is more convenient and the structural design is more reasonable.

[0069] Specifically, the driving component 75 can be a driving motor, or a driving motor connected to the output of a reducer and transmitted through a belt transmission structure, thereby driving the gear 76 or the rotating shaft 71 to rotate.

[0070] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention. The protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A bag support assembly for vacuuming a packaging bag, characterized in that: It comprises clamping members (3) arranged in pairs and a driving mechanism (7) for driving the clamping members (3) to perform opening and closing actions; The clamping member (3) is in the form of an arched structure whose span can be elastically changed as a whole, and both ends of the arched structure are respectively provided with clamping portions (31) for clamping the sides of the packaging bag (2).

2. A bag support assembly for vacuuming a packaging bag as claimed in claim 1, characterized in that: The clamping piece (3) is an integrated structure.

3. A bag support assembly for vacuuming a packaging bag as claimed in claim 2, characterized in that: The clamping part (3) is a sheet metal part formed by bending.

4. A bag support assembly for vacuuming a packaging bag as claimed in claim 1, characterized in that: The clamping portion (31) is connected to a resistance-enhancing pad (5) for contacting the packaging bag (2).

5. A bag support assembly for vacuuming a packaging bag as claimed in claim 4, characterized in that: The clamping portion (31) is provided with a clamping hole (32); The resistance-enhancing pad (5) comprises a pad portion (51) and a columnar connecting portion (52) passing through the clamping hole (32); the columnar connecting portion (52) is provided with a flexible clamping protrusion (53) that is limitedly matched with the clamping hole (32).

6. A bag support assembly for vacuuming a packaging bag as claimed in claim 1, characterized in that: A plurality of pairs of the clamping members (3) are arranged at intervals along the depth direction of the packaging bag (2).

7. A bag support assembly for vacuuming a packaging bag as claimed in claim 1, characterized in that: The driving mechanism (7) drives the two paired clamping members (3) to perform a closing and opening action of relative linear motion or relative deflection motion.

8. A bag support assembly for vacuuming a packaging bag as claimed in any one of claims 1 to 7, characterized in that: The clamping members (3) arranged in pairs are arranged in several groups along an arrangement direction to form parallel multi-stations.

9. A bag support assembly for vacuuming a packaging bag as claimed in claim 8, characterized in that: The driving mechanism (7) comprises a linkage mechanism and a driving component drivingly connected to the linkage mechanism; The clamping parts (3) forming multiple parallel workstations are connected to the linkage mechanism to drive the clamping parts (3) of all workstations to perform opening and closing actions synchronously.

10. A bag support assembly for vacuuming a packaging bag as claimed in claim 9, characterized in that: The linkage mechanism comprises two rotating shafts (71) parallel to each other along the arrangement direction, positioning shafts (79) located below the two rotating shafts (71) and parallel to each other, and a plurality of mounting arms in pairs respectively connected to each pair of clamping members (3), wherein the positioning shaft (79) is simultaneously rotationally connected to the two mounting arms (6) of each group, and the middle parts of the mounting arms (6) located on the same side are connected via a linkage shaft (74), and the driving assembly is used to drive the two rotating shafts (71) to perform synchronous forward and reverse rotation around their own axes; Each of the rotating shafts (71) is respectively fixed with a swing arm (72) corresponding to each group of clamping parts (3) on the same side. Each swing arm (72) is respectively connected to the linkage shaft (74) through a connecting rod (73), and both ends of the connecting rod (73) are rotatably connected to the swing arm (72) and the linkage shaft (74).

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