Packaging bag vacuumizing device and packaging machine

Abstract

The invention relates to the technical field of vacuum equipment, and discloses a packaging bag vacuumizing device and a packaging machine. The packaging bag vacuumizing device comprises two supporting plates which are oppositely arranged, a bag clamping mechanism used for fixing a packaging bag is arranged between the supporting plates, the supporting plates are further provided with vacuum pipes parallel to the bag clamping mechanism, the vacuum pipes are connected to the supporting plates through turnover mechanisms, and the turnover mechanisms are arranged on the supporting plates. The overturning mechanism is used for enabling the vacuum pipe to overturn between a first position and a second position, and when the vacuum pipe is overturned from the first position to the second position, a vacuum suction nozzle on the vacuum pipe is matched with a packaging bag located on a bag clamping station of the bag clamping mechanism and used for extracting gas in the packaging bag. The packaging machine comprises the packaging bag vacuumizing device, and the packaging machine is used for packaging materials and vacuumizing the packaging bag.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum equipment, and in particular to a packaging bag vacuum extraction device and a packaging machine. Background Art

[0002] The current automatic packaging machines are generally single-station packaging machines that can load and seal a packaging bag in sequence; the overall packaging efficiency is constrained by the efficiency of the most time-consuming station, and the packaging efficiency cannot be further improved.

[0003] There are also some devices in the prior art that can package two or more bags at the same time. However, due to the interference between the vacuum device and the multi-station packaging machine when packaging at multiple stations, vacuum processing cannot be achieved when multiple stations are set up for simultaneous packaging, which restricts the application scenarios of the multi-station packaging machine. Summary of the invention

[0004] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology and provide a packaging bag vacuum extraction device and a packaging machine.

[0005] In order to solve the above technical problems, the technical solution of the present invention is:

[0006] A vacuum extraction device comprises two supporting plates arranged opposite to each other, a bag clamping mechanism for fixing a packaging bag is arranged between the supporting plates, a vacuum tube parallel to the bag clamping mechanism is also arranged on the supporting plates, the vacuum tube is connected to the supporting plates via a flipping mechanism, the flipping mechanism is used to flip the vacuum tube between a first position and a second position, when the vacuum tube flips from the first position to the second position, the vacuum suction nozzle on the vacuum tube adapts to the packaging bag on the bag clamping mechanism and is used to extract gas in the packaging bag.

[0007] Furthermore, the support plate can be movably arranged on the driving device, and a gas distribution part is arranged under the support plate. The gas distribution part is provided with a plurality of connecting holes arranged at intervals along the extension direction of the gas distribution part, and the connecting holes are connected to a vacuum device; a vacuum component is fixedly arranged on the support plate, and the vacuum component is used to connect the vacuum tube and the connecting hole. When the driving device drives the support plate to move, the vacuum component is connected with the connecting holes in turn.

[0008] Furthermore, the vacuum assembly also includes a support plate, the bag clamping mechanism has a plurality of bag clamping stations arranged in a horizontal direction, and the vacuum tube is provided with a plurality of vacuum suction nozzles, and the vacuum suction nozzles correspond to the bag clamping stations one by one.

[0009] Furthermore, the flipping mechanism includes a driving part and a bearing part, the vacuum tube is fixed on the bearing part, and the driving part is used to drive the bearing part to rotate the vacuum tube between the first position and the second position.

[0010] Furthermore, the bearing portion includes a chain, the chain is pivotally disposed on the support plate, the vacuum tube is fixed on the chain, and the driving portion is used to drive the chain to rotate between the first position and the second position by driving the chain to rotate.

[0011] Furthermore, the support plate is provided with an annular groove, and the chain is arranged in the annular groove.

[0012] Furthermore, the bearing part includes a rocker mechanism, the driving part is used to drive the rocker mechanism to rotate between a first position and a second position, and the vacuum tube is fixedly connected to the rocker mechanism.

[0013] Furthermore, the driving part includes a rack and a gear arranged on the support plate, the rack can slide in a vertical direction relative to the support plate, the rack is used to drive the gear to rotate, and the gear is used to drive the bearing part to rotate between the first position and the second position.

[0014] 10. Further, it includes a pre-sealing mechanism, which is arranged on the vacuum tube, and includes a first movable member and a second movable member arranged on both sides of the vacuum nozzle, and the first movable member and the second movable member can move toward or away from the vacuum nozzle;

[0015] The vacuum tube has a vacuum interface. When the vacuum interface is located at the second position, the clips at one end of the first movable member and the second movable member are closed.

[0016] Furthermore, a flexible structure is also provided on the clips of the first movable member and the second movable member.

[0017] Furthermore, the first movable member and the second movable member are hinged on the vacuum tube to form a fork arm, and a lifting mechanism is provided at one end of the first movable member and the second movable member. The lifting mechanism is used to make the first movable member and the second movable member move toward each other when the vacuum interface is located at the second position, and the clips at one end of the first movable member and the second movable member are closed.

[0018] Furthermore, the lifting mechanism includes a push rod, a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are hinged on the push rod through a first rocker arm and a second rocker arm, the first movable part is hinged to the vacuum tube and the second connecting rod at the same time, the second movable part is hinged to the vacuum tube and the first connecting rod at the same time, a boss is provided on the support plate, and when the vacuum interface is rotated from the first position to the second position, the push rod contacts the boss and causes the push rod to move away from the vacuum tube.

[0019] A packaging machine comprises the aforementioned packaging bag vacuuming device, and the packaging machine is used for packaging materials and vacuuming the packaging bags.

[0020] Compared with the prior art, the advantages of the present invention are as follows: the packaging bag vacuuming device and packaging machine provided by the present invention, the bag clamping mechanism on the support plate can fix the packaging bag, when the vacuum tube is in the first position, the vacuum tube is away from the packaging bag, and the packaging bag on the bag clamping mechanism can be loaded or sealed, and when the vacuum tube is in the second position, the vacuum nozzle on the vacuum tube is inserted into the packaging bag and connected with the packaging bag. Therefore, the packaging bag vacuuming device provided by the present invention has two functions of fixing the packaging bag and vacuuming, the vacuum tube can be flipped so that the vacuum tube does not interfere with the loading or sealing device, the vacuum tube does not affect the loading or sealing, and the packaging efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the packaging bag vacuum pumping device of the present invention;

[0022] Figure 2 for Figure 1 A partial enlargement of the packaging bag vacuum device shown Figure I ;

[0023] Figure 3 It is a schematic diagram of the state of the packaging bag vacuum pumping device of the present invention when clamping the packaging bag;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure when the vacuum pumping assembly of the present invention does not include a bag clamping mechanism;

[0025] Figure 5 for Figure 4 A schematic diagram of the front view of the vacuum assembly shown;

[0026] Figure 6 It is a three-dimensional structural schematic diagram of a vacuum assembly excluding a support plate and a bag clamping mechanism;

[0027] Figure 7 for Figure 6 A partial enlargement of the vacuum assembly shown Figure II ;

[0028] Figure 8 for Figure 6 A schematic diagram of the front view of the vacuum assembly shown;

[0029] Fig. 9 for Figure 6 A schematic diagram of the top view of the vacuum assembly shown;

[0030] In the figure: gas distribution part 100, connecting hole 101, connecting pipe 201, vacuum suction nozzle 202, vacuum tube 203, vacuum interface 2031, support plate 204, sprocket 205, chain 206, first movable part 207, second movable part 208, push rod 209, first connecting rod 210, second connecting rod 211, first rocker arm 212, second rocker arm 213, first machine clamp body 214, second machine clamp body 215, first push rod 216, second push rod 217, drive rod 218, bag clamping mechanism 219, gear 220, rack 221, flexible structure 300, packaging bag 900. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] An embodiment of the present invention provides a vacuum pumping device, such as Figure 1 and Figure 3 As shown, it includes two supporting plates 204 arranged opposite to each other, a bag clamping mechanism 219 for fixing the packaging bag is arranged between the supporting plates 204, and a vacuum tube 203 parallel to the bag clamping mechanism 219 is also arranged on the supporting plate 204, and the vacuum tube 203 is connected to the supporting plate 204 through a flipping mechanism, and the flipping mechanism is used to flip the vacuum tube 203 between a first position and a second position. When the vacuum tube 203 flips from the first position to the second position, the vacuum suction nozzle 202 on the vacuum tube 203 adapts to the packaging bag located at the bag clamping station of the bag clamping mechanism 219 and is used to extract gas in the packaging bag.

[0033] like Figure 2As shown, the bag clamping mechanism 219 may include a first clamping body 214 and a second clamping body 215, and a bag clamping station is provided between the first clamping body 214 and the second clamping body 215. The first clamping body 214 can move horizontally under the drive of the first push rod 216, and the second clamping body 215 can move horizontally under the drive of the second push rod 217. By controlling the movement direction of the first push rod 216 and the second push rod 217, the horizontal distance between the first clamping body 214 and the second clamping body 215 can be controlled. When the driving rod 218 rotates, it is used to drive the clamping position of the first clamping body 214 and the second clamping body 215 to open and close. In order to realize the simultaneous vacuuming of multiple packaging bags, multiple bag clamping stations can be provided, that is, multiple groups of first clamping bodies 214 and second clamping bodies 215 can be provided to form multiple bag clamping stations. Correspondingly, multiple vacuum suction nozzles 202 corresponding to the bag clamping stations need to be provided.

[0034] The support plate 204 is used to connect the vacuum tube 203 and the bag clamping mechanism 219, and the vacuum tube 203 is used to communicate with the vacuum equipment. When the vacuum tube 203 is in the first position, the bag opening of the packaging bag 900 on the bag clamping mechanism 219 is exposed, and the loading or sealing process can be carried out; the vacuum tube 203 is flipped from the first position to the second position under the action of external force; when the vacuum tube 203 is in the second position, the vacuum suction nozzle 202 on the vacuum tube 203 is inserted into the packaging bag, and the negative pressure generated by the vacuum equipment can extract the gas in the packaging bag 900 and evacuate the packaging bag 900.

[0035] The vacuum tube 203 can be flipped manually or by a mechanical mechanism, such as a rocker mechanism, a swing guide rod mechanism, a lever structure or a turntable. For example, the vacuum tube 203 can be eccentrically set on the turntable, and the turntable is rotated, and the vacuum tube 203 will flip as the turntable rotates; for another example, the vacuum tube 203 can be fixed to one end of a lever, and the other end of the lever is rotated, and the vacuum tube 203 will flip as the lever rotates.

[0036] The vacuum tube 203 is configured to be able to flip between a first position and a second position. When the vacuum tube 203 is in the first position, the vacuum nozzle 202 is outside the packaging bag, so that the bag opening of the packaging bag 900 can be in a completely exposed state, which is convenient for loading or sealing the packaging bag at different workstations.

[0037] As a possible implementation, see Figures 1 to 5The support plate 204 can be movably arranged on the driving device, and a gas distribution part 100 is arranged below the support plate 204. The gas distribution part 100 is provided with a plurality of connecting holes 101 arranged at intervals along the extension direction of the gas distribution part 100, and the gas distribution part 100 is connected to a vacuum device; a vacuum component is fixedly arranged on the support plate 204, and the vacuum component is used to connect the vacuum tube 203 and the connecting hole 101. When the driving device drives the support plate 204 to move, the vacuum component is connected with the connecting holes 101 in turn.

[0038] Exemplarily, the gas distribution component 100 can be made of materials such as a round tube, a square tube, a round steel or a square steel, and a hole is opened on the round tube, the square tube, the round steel or the square steel to form a connection hole 101. The connection hole 101 is connected to the vacuum device. For example, each connection hole 101 can be connected to a vacuum device, or multiple connection holes 101 are connected to the same vacuum device. When the vacuum component slides along the gas distribution component 100, the vacuum tube 203 can be connected to the connection holes 101 at different positions.

[0039] The support plate 204 can slide along the extension direction of the gas distribution component 100 manually or mechanically, for example, the support plate 204 can be displaced by being driven by a conveyor belt or a motor.

[0040] The vacuum assembly is used to connect the vacuum tube 203 and the connecting hole 101. Exemplarily, the vacuum assembly may include a connecting tube 201, the vacuum assembly is connected to a vacuum tube 203, the vacuum tube 203 may be provided with a vacuum nozzle 202, the vacuum tube 203 and the connecting tube 201 may be connected through a valve, may be connected through a quick connector, or may be connected through a pipeline, and the vacuum tube 203 and the connecting tube 201 may be an integral structure or a split structure. The vacuum tube 203 and the connecting tube 202 may always remain relatively still, for example, when the vacuum tube 203 and the connecting tube 202 are connected by a pipeline, the vacuum tube 203 and the connecting tube 202 may also generate relative motion, for example, when the vacuum tube 203 and the connecting tube 201 are connected by a quick connector, the vacuum tube 203 is connected to the connecting tube 201 by linear motion or rotational motion.

[0041] Such a design enables the support plate 204 to evacuate the packaging bag 900 while driving the packaging bag 900 to move. Compared with the existing vacuuming method which requires moving the packaging bag to a vacuuming station, this can save packaging time and improve packaging efficiency.

[0042] After the packaging bag to be vacuumed is fixed by the bag clamping mechanism 219, the vacuum nozzle 202 is inserted into the packaging bag, and the packaging bag 900 moves with the sliding of the vacuum component. During the movement of the packaging bag 900, the vacuum nozzle 202 can remain inserted into the packaging bag, and the vacuum equipment vacuums the packaging bag through the vacuum tube 203.

[0043] The support plate 204 can be moved manually or mechanically, for example, the vacuum tube is moved by a linear motor, or it can be moved by a driving mechanism such as a belt or a chain.

[0044] When the vacuum tube 203 moves from the first position to the second position, the vacuum tube 203 is connected to the connecting tube 201. Exemplarily, the vacuum interface 2031 of the vacuum tube 203 can be connected to the connecting tube 201 through a quick connector, or the vacuum interface 2031 can be directly connected to the interface of the connecting tube 201. The vacuum tube 203 is configured to be movable from the first position to the second position, and can drive the vacuum nozzle 202 to move, so as to facilitate the insertion of the vacuum nozzle 202 into the packaging bag.

[0045] The flipping mechanism may be located on the supporting plate 204 , and the flipping mechanism is used to drive the vacuum interface 2031 of the vacuum tube 203 to rotate from a first position to a second position.

[0046] Exemplarily, the flipping mechanism may include a driving part and a bearing part, the vacuum tube 203 is fixed on the bearing part, and the driving part is used to drive the bearing part to rotate between the first position and the second position.

[0047] like Figure 5 As shown, the driving part may include a rack 221 and a gear 220 disposed on the support plate 204, wherein the rack 221 can slide in the vertical direction, and the rack 221 is used to drive the gear 220 to rotate, and the gear 220 is used to drive the bearing part to rotate between the first position and the second position. When the rack 221 slides under the action of an external force, it can drive the gear 220 to rotate, and when the gear 220 rotates, it drives the bearing part to rotate, thereby driving the vacuum tube 203 to flip, and the rack is preferably connected to a cam mechanism, which can be disposed on the side of the support plate, and the maximum stroke of the rack displacement is controlled by the cam mechanism, and the cam mechanism can be a cam divider or a cam groove or other structures.

[0048] As a possible implementation, see Figure 4 The bearing portion includes a chain 206, the chain 206 is pivotally disposed on the support plate 204, the vacuum tube 203 is fixed on the chain 206, and the gear 220 is used to drive the chain 206 to rotate between a first position and a second position by driving the chain 206 to rotate.

[0049] The gear 220 can be coaxially connected with the sprocket 205. When the gear 220 rotates, the sprocket 205 is driven to rotate, thereby driving the chain 206 to rotate. When the chain 206 rotates, the vacuum tube 203 fixed on the chain 206 moves and flips accordingly. In order to prevent the chain 206 from interfering with other structures when rotating, an annular groove can be provided on the support plate 204, and the chain 206 is arranged in the annular groove, so that most of the chain 206 is isolated from the outside world, and the possibility of the chain 206 interfering with the external structure is reduced as much as possible.

[0050] The bearing part may also be a rocker mechanism, the gear 220 drives the rocker mechanism to rotate between the first position and the second position, and the vacuum tube 203 is fixedly connected to the rocker mechanism. The rocker mechanism includes at least one rocker, one end of which is hinged on the support plate 204 or fixed on the gear 220. Accordingly, when the gear 220 rotates, the rocker can be driven to rotate through the gear structure or directly driven to rotate, thereby driving the vacuum tube 203 fixed to the rocker mechanism to move. Those skilled in the art can adaptively select the specific structure of the rocker mechanism, such as a crank, a connecting rod, etc., based on the specification of this application, and no further description is given.

[0051] As a possible implementation, see Figure 1 , Figure 3 and Figure 4 The vacuum component also includes a pre-sealing mechanism, which is located on the vacuum tube 203. The pre-sealing mechanism includes a first movable member 207 and a second movable member 208 arranged on both sides of the vacuum suction nozzle 202. The first movable member 207 and the second movable member 208 can move toward or away from the vacuum suction nozzle; the first movable member 207 and the second movable member 208 can be arranged on the vacuum tube 203 in a hinged manner.

[0052] The vacuum tube 203 has a vacuum interface 2031. When the vacuum interface 2031 is in the second position, the clips at one end of the first movable member and the second movable member are closed. The first movable member 207 and the second movable member 208 can be a rod-shaped structure, a plate-shaped structure or a rocker arm structure.

[0053] When the packaging bag is being vacuumed, the vacuum nozzle 202 is inserted into the packaging bag, and the first movable member 207 and the second movable member 208 clamp the vacuum nozzle 202 while clamping the bag opening of the packaging bag to play a pre-sealing role, thereby facilitating rapid vacuuming of the packaging bag.

[0054] In order to facilitate pressing the part of the packaging bag that contacts the vacuum suction nozzle 202 onto the vacuum suction nozzle 202 and further improve the sealing effect during vacuum extraction, a flexible structure such as a sponge strip or a rubber strip can be provided on the clamping pieces of the first movable member 207 and the second movable member 208. When the first movable member 207 and the second movable member 208 clamp the vacuum suction nozzle 202, the flexible structure can produce adaptive deformation at the part that contacts the vacuum suction nozzle 202, and can clamp the packaging bag onto the vacuum suction nozzle, thereby improving the sealing of the pre-seal and ensuring the efficiency of vacuum extraction.

[0055] As a possible implementation, please refer to Figures 3 to 6 The first movable member 207 and the second movable member 208 are hinged on the vacuum tube 203 to form a fork arm, and a lifting mechanism is provided at one end of the first movable member 207 and the second movable member 208. The lifting mechanism is used to make the first movable member 207 and the second movable member 208 move toward each other when the vacuum interface 2031 is located at the second position, and the clips at one end of the first movable member 207 and the second movable member 208 are closed.

[0056] The lifting mechanism may include a push rod 209, a first connecting rod 210 and a second connecting rod 211. The first connecting rod 210 and the second connecting rod 211 are respectively hinged on the push rod 209 through a first rocker arm 212 and a second rocker arm 213, the first movable member 207 is hinged to the vacuum tube 203 and the second connecting rod 211, the second movable member 208 is hinged to the vacuum tube 203 and the first connecting rod 210, a boss is provided on the support plate 204, and when the vacuum interface 2031 rotates from the first position to the second position, the push rod 209 contacts the boss and causes the push rod 209 to move in a direction away from the vacuum tube 203.

[0057] When the vacuum interface 2031 rotates from the first position to the second position, the push rod 209 gradually contacts the boss, and the boss is fixed. Under the action of the reaction force, the push rod 209 moves away from the vacuum tube 203, thereby driving the first connecting rod 210 and the second connecting rod 211 to move away from the vacuum tube 203 through the first rocker arm 212 and the second rocker arm 213. Since the pre-sealing mechanism also includes the push rod 209, the first connecting rod 210 and the second connecting rod 211, the push rod 209 and the first connecting rod 210 and the second connecting rod 211 are 211 are respectively hinged by the first rocker arm 212 and the second rocker arm 213, the first movable member 207 is hinged to the vacuum tube 203 and the second connecting rod 211, the second movable member 208 is hinged to the vacuum tube 203 and the first connecting rod 210, a boss is provided on the support plate 204, when the vacuum interface 2031 rotates from the first position to the second position, the push rod 209 contacts the boss and causes the push rod 209 to move away from the vacuum tube 203. The second movable member 208 is hinged to the vacuum tube 203 and is also hinged to the first connecting rod 210. When the first connecting rod 210 moves away from the vacuum tube 203, the second movable member 208 rotates toward the first movable member 207. Similarly, driven by the second connecting rod 211, the first movable member 207 also rotates toward the second movable member 208. Therefore, when the push rod 209 moves away from the vacuum tube 203, the first movable member 207 and the second movable member 208 move toward each other to clamp the vacuum suction nozzle 202. When the push rod 209 moves toward the vacuum tube 203, the first movable member 207 and the second movable member 208 move in opposite directions to release the vacuum suction nozzle 202.

[0058] When multiple bag clamping stations are provided, the lifting mechanism can move the first movable member 207 and the second movable member 208, so that the first movable member 207 and the second movable member 208 can clamp or release multiple vacuum nozzles 202 and packaging bags 900 at the same time, thereby achieving the purpose of vacuuming multiple packaging bags 900 at the same time.

[0059] The second aspect of the present invention provides a packaging machine, comprising the aforementioned vacuum pumping device, the packaging machine is used to package materials and vacuumize the packaging bag. The packaging machine can be used to package bulk materials or relatively regular materials, such as candy, salt, liquid or soap, chocolate, etc. After the material enters the packaging bag, the vacuum suction nozzle 202 is inserted into the packaging bag and the aforementioned vacuum pumping device is used to vacuum the packaging bag.

[0060] 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, and 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 packaging bag vacuum device, characterized in that: The invention comprises two supporting plates (204) arranged opposite to each other, a bag clamping mechanism (219) for fixing the packaging bag is arranged between the supporting plates (204), a vacuum tube (203) parallel to the bag clamping mechanism (219) is also arranged on the supporting plates (204), the vacuum tube (203) is connected to the supporting plates (204) via a flipping mechanism, the flipping mechanism is used to flip the vacuum tube (203) between a first position and a second position, when the vacuum tube (203) flips from the first position to the second position, the vacuum suction nozzle (202) on the vacuum tube (203) adapts to the packaging bag located at the bag clamping station of the bag clamping mechanism (219) and is used to extract gas in the packaging bag.

2. The packaging bag vacuum evacuation device according to claim 1, characterized in that: The support plate (204) is movably arranged on the driving device, and a gas distribution component (100) is arranged below the support plate (204). The gas distribution component (100) is provided with a plurality of connection holes (101) arranged at intervals along the extension direction of the gas distribution component (100), and the connection holes (101) are connected to a vacuum device; a vacuum component is fixedly arranged on the support plate (204), and the vacuum component is used to connect the vacuum tube (203) and the connection holes (101). When the driving device drives the support plate (204) to move, the vacuum component is connected to the connection holes (101) in sequence.

3. The packaging bag vacuum evacuation device according to claim 2, characterized in that: The bag clamping mechanism (219) has a plurality of bag clamping stations arranged in a horizontal direction, and a plurality of vacuum suction nozzles (202) are arranged on the vacuum tube (203), and the vacuum suction nozzles (202) correspond to the bag clamping stations one by one.

4. The packaging bag vacuum evacuation device according to claim 1, characterized in that: The flipping mechanism comprises a driving part and a bearing part, the vacuum tube (203) is fixed on the bearing part, and the driving part is used to drive the bearing part to make the vacuum tube (203) rotate between a first position and a second position.

5. The packaging bag vacuum evacuation device according to claim 4, characterized in that: The bearing portion comprises a chain (206), the chain (206) being pivotally arranged on the support plate (204), the vacuum tube (203) being fixed on the chain (206), and the driving portion being used for driving the chain (206) to rotate between a first position and a second position by driving the chain (206) to rotate.

6. The packaging bag vacuum evacuation device according to claim 5, characterized in that: The support plate (204) is provided with an annular groove, and the chain (206) is arranged in the annular groove.

7. The packaging bag vacuum evacuation device according to claim 4, characterized in that: The bearing part comprises a rocking rod mechanism, the driving part is used to drive the rocking rod mechanism to rotate between a first position and a second position, and the vacuum tube (203) is fixedly connected to the rocking rod mechanism.

8. The packaging bag vacuum evacuation device according to any one of claims 5 to 7, characterized in that: The driving portion comprises a rack (221) and a gear (220) arranged on the support plate (204); the rack (221) is capable of sliding in a vertical direction relative to the support plate; the rack (221) is used to drive the gear (220) to rotate; and the gear (220) is used to drive the bearing portion to rotate between a first position and a second position.

9. The packaging bag vacuum evacuation device according to any one of claims 1 to 7, characterized in that: It also includes a pre-sealing mechanism, which is arranged on the vacuum tube (203), and includes a first movable member (207) and a second movable member (208) arranged on both sides of the vacuum suction nozzle (202), and the first movable member (207) and the second movable member (208) are capable of moving in a direction close to or away from the vacuum suction nozzle; The vacuum tube (203) has a vacuum interface (2031), and when the vacuum interface (2031) is located at the second position, the clips at one end of the first movable member (207) and the second movable member (208) are closed.

10. The packaging bag vacuum evacuation device according to claim 9, characterized in that: A flexible structure (300) is also provided on the clips of the first movable member (207) and the second movable member (208).

11. The packaging bag vacuum evacuation device according to claim 9, characterized in that: The first movable member (207) and the second movable member (208) are hinged on the vacuum tube (203) to form a fork arm, and a lifting mechanism is provided at one end of the first movable member (207) and the second movable member (208). The lifting mechanism is used to make the first movable member (207) and the second movable member (208) move towards each other when the vacuum interface (2031) is located at the second position, and the clamps at one end of the first movable member (207) and the second movable member (208) are closed.

12. The packaging bag vacuum evacuation device according to claim 11, characterized in that: The lifting mechanism comprises a lift rod (209), a first connecting rod (210) and a second connecting rod (211); the first connecting rod (210) and the second connecting rod (211) are respectively hinged on the lift rod (209) through a first rocker arm (212) and a second rocker arm (213); the first movable member (207) is hinged to the vacuum tube (203) and is also hinged to the second connecting rod (211); the second movable member (208) is hinged to the vacuum tube (203) and is also hinged to the first connecting rod (210); a boss is provided on the support plate (204); when the vacuum interface (2031) rotates from the first position to the second position, the lift rod (209) contacts the boss and causes the lift rod (209) to move in a direction away from the vacuum tube (203).

13. A packaging machine, characterized in that: The invention comprises a packaging bag vacuum pumping device as claimed in any one of claims 1 to 12, wherein the packaging bag vacuum pumping device is used for packaging materials and vacuuming the packaging bag.

Images