Rotary Vacuum Extraction Device for Food Packaging Equipment

Abstract

The present invention relates to a food packaging device, and particularly to a rotary vacuum pumping device for a food packaging device. The present invention provides the following technical solutions: A rotary vacuum pumping device for a food packaging device includes a turntable and a vacuum pumping assembly. The vacuum pumping assembly includes a base and a cover body. An opening and closing cover driving mechanism is provided between the turntable and the vacuum pumping assembly. A support frame is provided on the turntable. The cover body is connected to the support frame through a support arm. A closing position tension adjusting member is provided between the support frame and the cover body; the base is hingedly connected to the turntable through a hinge block. The base has a linkage station. The support arm and the linkage station of the base are linked through a connecting rod. One end of the connecting rod extends between the two hinge points of the support arm and is hingedly connected to the support arm, and the other end is at the linkage station and is hingedly connected to the linkage station. By adopting the above technical solutions, a rotary vacuum pumping device for a food packaging device with energy saving, shortened vacuum pumping time, and simple structure is provided.

Description

Technical Field

[0001] The present invention relates to a food packaging device, and particularly to a rotary vacuum pumping device for a food packaging device. Background Art

[0002] A food packaging device is a special packaging machine that fills food into a packaging bag, and then uses a vacuum pumping device to remove the air inside the packaging bag body and seal the bag mouth.

[0003] Traditional food packaging devices mainly consist of a machine body, a packaging bag conveying device, a bag opening device, a food filling device, and a vacuum pumping device provided on the machine body. In the traditional vacuum pumping device, since several vacuum pumping chambers are arranged side by side, after the food is filled, a manipulator is used to transfer the packaging bag with food into the vacuum pumping device to complete the vacuum extraction. Since the manipulator cannot simultaneously transport several packaging bags into the vacuum pumping chambers arranged side by side, in order to ensure that each vacuum chamber has a packaging bag respectively, during the transportation process, such a vacuum extraction device needs to stop and wait, with low efficiency, thus affecting the packaging speed of the device and making it impossible to complete high-efficiency packaging.

[0004] In order to improve the vacuum pumping efficiency, through continuous research and development by those skilled in the art, a rotary vacuum pumping device has emerged in the market and in relevant materials. This device mainly consists of a rotatable turntable and vacuum pumping components evenly distributed on the turntable. This method can ensure that the vacuum pumping process does not experience stagnation, thereby improving the overall packaging efficiency.

[0005] The vacuum pumping component consists of a base and a cover body that can be opened and closed with the base. The space between the base and the cover body is the vacuum pumping chamber. The traditional vacuum pumping component is arranged perpendicular to the turntable, with its base in a fixed state. The opening and closing of the cover on it are driven by a driving source to complete the transportation of the bag body filled with food into the vacuum pumping chamber. Since the vacuum component and the bag body filled with food are perpendicular to the ground plane, the packaged food accumulates at the bottom of the packaging bag, making the product unsightly and increasing the volume during subsequent packaging and transportation. To solve such problems, the method of flatly squeezing food has been adopted in this field, but the breakage rate after packaging is relatively high, and it is not suitable for foods with poor fluidity and foods that are easy to pierce the packaging bag body, etc. The base in the vacuum pumping component is relatively heavy. If the cover body maintains a horizontal fixed state and directly drives the base in the vacuum component to horizontally close the vacuum chamber upward, a relatively energy-consuming power source needs to be used for driving. This not only consumes energy but also takes a long time for opening and closing the cover. High energy consumption and long time consumption undoubtedly increase the production cost and the packaging efficiency cannot be effectively improved. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the present invention provides a rotary vacuum pumping device for a food packaging device that is energy-saving, shortens the vacuum pumping time, and has a simple structure.

[0007] To achieve the above object, the present invention provides the following technical solution: A rotary vacuum pumping device for a food packaging equipment, comprising a rotatable turntable in the circumferential direction and a plurality of vacuum pumping components evenly distributed along the outer circumference of the turntable. The turntable has an opening / closing cover station and a vacuum pumping station. The vacuum pumping component includes a base and a cover body that can be opened and closed with the base. There is a vacuum pumping chamber between the base and the cover body. A bag clamping mechanism is provided in the vacuum pumping chamber. An opening / closing cover driving mechanism for separating or closing the base and the cover body is provided between the turntable and the vacuum pumping component. It is characterized in that: A support frame is provided on the turntable. The cover body is connected to the support frame through a support arm. The longitudinal ends of the support arm respectively have hinge points, and the two hinge points are respectively hinged to the support frame and the cover body. An adjustable closing cover position tension adjusting member is provided between the support frame and the cover body; The base is hinged to the turntable through a hinge block. One end of the base close to the turntable has a linkage station. The support arm and the linkage station of the base are linked through a connecting rod. One end of the connecting rod extends between the two hinge points of the support arm and is hinged to the support arm, and the other end is at the linkage station and is hinged to the linkage station. The opening / closing cover driving mechanism includes a cam component arranged around the turntable, a linkage block linked to the cam component, and a push rod that can reciprocate axially along the turntable and is linked to the linkage block. One end of the push rod is hinged to the linkage block, and the other end is hinged to the linkage station of the base.

[0008] With the above technical solution, when the turntable rotates to its opening / closing cover station, the push rod is driven by the cam component. The push rod presses upward at the linkage station of the base towards the upper part of the base. The base rotates along the hinge with the hinge block. At the same time, the resisting force of the connecting rod on the support arm causes the support arm to drive the cover body to move upward and separate from the base, realizing opening the cover; When the push rod loses the driving force of the cam component, the cover body moves towards the base under the action of its own gravity. At this time, the support arm connected to the cover body will provide a linkage force to the connecting rod, and the end of the connecting rod connected to the base will pull the base to rotate back to the original closing cover position until the cover body and the base are completely combined. As can be seen from the above solution, in the vacuum component, the base and the bag clamping mechanism installed in the base, most of the gravity is located at one end of the base hinge. The gravity of the cover body in the vacuum component is applied to the other end of the base hinge through the support arm and the linkage connecting rod, and the gravity of this end of the cover body is slightly heavier. Its closing of the cover is completed by means of the self-weight of the cover body without any driving force provided by a driving source. When opening the cover, a relatively light power needs to be provided by the driving source to offset a small part of the gravity of the cover body to complete. Thereby reducing energy consumption, saving energy and also reducing production costs, and closing the cover by its own gravity, the closing speed of the cover is fast, the time required for vacuum pumping can be shortened, and it provides a foundation for improving the overall packaging efficiency. The setting of the closing cover position tension adjusting member can adjust the position when the cover body and the base are closed, so that the two can completely coincide when closing the cover, preventing deviation in closing the cover and improving the closing accuracy.

[0009] The present invention is further configured such that the connecting rod is arc-shaped, and an articulated mounting seat is provided at the linkage station of the base. The connecting rod and the ejector rod are respectively hinged to the articulated mounting seat through hinge shafts.

[0010] With the above technical solution, the connecting rod and the ejector rod share one hinge shaft, which not only has a simple structure but also is convenient for assembly. The connecting rod is arc-shaped, which not only makes the lid closing process between the lid and the base smoother, but also makes the opening and closing process between the lid and the base more labor-saving, further reducing the energy consumption required by the drive source and lowering the production cost caused by energy consumption.

[0011] The present invention is further configured such that the articulated block includes a seat body fixedly connected to the turntable and an articulated lug connected to the seat body. The end face of the seat body facing the outside of the turntable is an inclined surface that can abut against the base for limiting.

[0012] With the above technical solution, the inclined surface provided on the seat body of the articulated block that abuts against the base for limiting can keep a certain angle of inclination between the base and the articulated block when the base is in the open lid state, which is more convenient for lid closing with the lid and prevents deviation during lid closing.

[0013] The present invention is further configured such that the cam assembly includes an arc-shaped body at the opening and closing lid station of the turntable. A cam track groove is provided on the outer peripheral surface of the arc-shaped body. The cam track groove includes an opening lid groove, a closing lid groove, and a connecting groove connecting the opening lid groove and the closing lid groove. The connecting groove is located at the top of the outer peripheral surface of the arc-shaped body. The entry end of the opening lid groove is the lowest point of the cam track groove. The output end of the opening lid groove is communicated with the connecting groove. The entry end of the closing lid groove is communicated with the connecting groove. The output end of the closing lid groove is the lowest point of the cam track groove. A roller adapted to the cam track groove is provided on the linkage block.

[0014] With the above technical solution, when the vacuum pumping assembly enters the opening and closing lid station of the turntable, the roller of the linkage block thereon enters from the entry end of the opening lid groove in the cam track groove and enters the connecting groove from the output end of the opening lid groove. During this process, the ejector rod linked with the linkage block will exert a top pressure towards the upper part of the base, realizing the linkage opening of the base and the lid. When the ball enters the closing lid groove from the connecting groove, the base and the lid are closed. It not only has a simple structure, but also the opening and closing lid times can be preset, effectively improving the overall packaging efficiency.

[0015] The present invention is further configured such that the closing lid position tension adjusting member includes connecting heads respectively hinged to the lid and the support frame and a connecting rod connecting the two connecting heads and enabling the axial stroke between the two connecting heads to be adjustable.

[0016] With the above technical solution, such a setting has a simple structure and is convenient for adjustment.

[0017] The present invention will be further described below in conjunction with the accompanying drawings. Description of the Drawings

[0018] Figure 1 Schematic perspective view of an embodiment of the present invention Figure 1 ;

[0019] Figure 2 Schematic perspective view of an embodiment of the present invention Figure 2 ;

[0020] Figure 3 Schematic view of the open cover state of the vacuum pumping assembly in an embodiment of the present invention Figure 1 ;

[0021] Figure 4 Schematic view of the open cover state of the vacuum pumping assembly in an embodiment of the present invention Figure 2 ;

[0022] Figure 5 Schematic view of the closed cover state of the vacuum pumping assembly in an embodiment of the present invention;

[0023] Figure 6 Schematic perspective view of the cam assembly in an embodiment of the present invention;

[0024] Figure 7 Schematic perspective view of the hinge block in an embodiment of the present invention. Detailed Embodiments

[0025] As Figure 1 — Figure 7A rotary vacuum pumping device for a food packaging equipment as shown, comprising a turntable 1 driven to rotate circumferentially through a rotating shaft and a plurality of vacuum pumping assemblies 2 evenly distributed along the outer periphery of the turntable 1. The rotating shaft is driven by a driving source, such as a motor. The turntable 1 has an opening and closing cover station 11 and a vacuum pumping station 12. The vacuum pumping assembly 2 includes a base 21 and a cover body 22 that can be opened and closed with the base 21. There is a vacuum pumping chamber 23 between the base 21 and the cover body 22. A bag clamping mechanism 3 is provided in the vacuum pumping chamber 23. An opening and closing cover driving mechanism 5 is provided between the turntable 2 and the vacuum pumping assembly 2 to cause the base 21 and the cover body 22 to separate or close. A support frame 6 is provided on the turntable 2. The cover body 22 is connected to the support frame 6 through a support arm 7. The longitudinal two ends of the support arm 7 respectively have hinge points, and the two hinge points are respectively hinged to the support frame 6 and the cover body 22. An adjustable closing cover position tension adjusting member 8 is provided between the support frame 6 and the cover body 22. The closing cover position tension adjusting member 8 includes a connecting head 81 respectively hinged to the cover body 22 and the support frame 6 and a connecting rod 82 connecting the two connecting heads 81 and enabling the axial stroke between the two connecting heads 81 to be adjustable. The connecting head 81 and the connecting rod 82 are rotated through threads. Of course, the closing cover position tension adjusting member 8 can also be a hydraulic pull rod or a gas spring with elastic supporting force, both of which are feasible. The longitudinal two sides of the base 21 are respectively hinged to the turntable 1 through hinge blocks 13. One end of the base 21 close to the turntable 1 has a linkage station 211. The support arm 7 and the linkage station 211 of the base 21 are linked through a connecting rod 9. One end of the connecting rod 9 extends between the two hinge points of the support arm 7 and is hinged to the support arm 7, and the other end is at the linkage station 211 and is hinged to the linkage station 211. The opening and closing cover driving mechanism 5 includes a cam assembly 51 arranged around the opening and closing cover station 11 of the turntable 1, a linkage block 52 linked to the cam assembly 51, and a push rod 53 linked to the linkage block 52 and capable of reciprocating axially along the turntable 1. One end of the push rod 53 is hinged to the linkage block 52, and the other end is hinged to the linkage station 211 of the base 21. When the turntable 1 rotates to its opening and closing cover station 11, the push rod 53 is driven by the cam assembly 51. The push rod 53 presses upward at the linkage station 211 of the base 21 towards the upper part of the base 21. The base 21 is turned over along the hinge with the hinge block 13. At the same time, the resisting force of the connecting rod 9 on the support arm 7 causes the support arm 7 to drive the cover body 22 to move upward and separate from the base 21 to achieve opening the cover; when the push rod 53 loses the driving force of the driving source, the cover body 22 moves towards the base 21 under the action of its own gravity. At this time, the support arm 7 connected to the cover body 22 will provide a linkage force to the connecting rod 9, and one end of the connecting rod 9 connected to the base 21 will pull the base 21 to turn over again to the original closing cover position until the cover body 22 and the base 21 are completely combined.When the vacuum pumping device is opened, the opening force needs to be provided by a driving source. When it is closed, it is completed by relying on the self-weight of the cover body 22 without the driving source providing any driving force, thus reducing energy consumption. While saving energy, it also reduces production costs. And closing the cover by its own gravity has a fast closing speed, which can shorten the time required for vacuum pumping and lay a foundation for improving the overall packaging efficiency. The setting of the closing position tension adjusting member 8 can adjust the position when the cover body 22 and the base 21 are closed, so that the two can completely coincide when closing, prevent deviation during closing, and improve the closing accuracy.

[0026] In the embodiment of the present invention, in order to make it more labor-saving during the opening and closing process of the cover, reduce the energy consumption required by the driving source, and reduce the production cost caused by energy consumption, the connecting rod 9 is arranged in an arc shape, and the connecting rod 9 is composed of two arc-shaped strips arranged in parallel. The two arc-shaped connecting strips are locked through fasteners. An articulated mounting seat 212 is provided at the linkage station 211 of the base 21. The connecting rod 9 and the ejector rod 53 are respectively hinged to the articulated mounting seat 212 through a hinge shaft. The connecting rod 9 and the ejector rod 53 share a hinge shaft, which is not only convenient for assembly, but also makes the ejector rod 53 more labor-saving during the driving process.

[0027] In order to ensure the accuracy when the base 21 and the cover body 22 are closed, the articulated block 13 includes a seat body 131 fixedly connected to the turntable 1 and an articulated lug 132 connected to the seat body 131. The end face of the seat body 131 facing the outside of the turntable 1 is an inclined surface 1311 that can be in contact with and limit the base 21. When the base 21 is in the open state, the inclination angle between the base 21 and the seat body 131 is 15° - 20°.

[0028] In an embodiment of the present invention, the cam assembly 51 includes an arc-shaped body at the opening / closing position 11 of the turntable 1. A cam track groove is provided on the outer peripheral surface of the arc-shaped body. The cam track groove includes an opening cover groove 511, a closing cover groove 512, and a connecting groove 513 connecting the opening cover groove 511 and the closing cover groove 512. The connecting groove 513 is located at the top of the outer peripheral surface of the arc-shaped body. The entry end of the opening cover groove 511 is the lowest point of the cam track groove. The output end of the opening cover groove 511 is communicated with the connecting groove 513. The entry end of the closing cover groove 512 is communicated with the connecting groove 513. The output end of the closing cover groove 512 is the lowest point of the cam track groove. A roller 521 adapted to the cam track groove is provided on the linkage block 52. When the vacuum pumping assembly 2 enters the opening / closing position 11 of the turntable 1, the roller 521 of the linkage block 52 thereon enters from the entry end of the opening cover groove 511 in the cam track groove and enters the connecting groove 513 from the output end of the opening cover groove 511. During this process, the ejector rod 53 linked to the linkage block 52 will press against the upper part of the base 21, realizing the linkage opening of the base 21 and the cover body 22. When the roller 521 enters the closing cover groove 512 from the connecting groove 513, the base 21 and the cover body 22 are closed. It not only has a simple structure, but also the opening and closing times can be preset in advance, effectively improving the overall packaging efficiency.

[0029] In order to make the positional arrangement among the components on the base 21 more reasonable and avoid collisions during operation. The bag clamping mechanism 3 is provided on the base 21. The bag clamping mechanism 3 includes a clamping claw 31 that can be opened and closed inside the base 21. A linkage member 32 for promoting the opening and closing of the clamping claw 31 is provided at the bottom of the base 21. The linkage member 32 is a linkage rod, and the linkage rod can be driven by a cam, or can be driven by a motor or a cylinder, which are all feasible.

Claims

1. A rotary vacuum pumping device for a food packaging equipment, comprising a rotatable turntable in the circumferential direction and a plurality of vacuum pumping assemblies evenly distributed along the outer circumference of the turntable. There are an opening / closing cover station and a vacuum pumping station on the turntable. The vacuum pumping assembly includes a base and a cover body that can be opened and closed with the base. There is a vacuum pumping chamber between the base and the cover body. A bag clamping mechanism is provided in the vacuum pumping chamber. An opening / closing cover driving mechanism for separating or closing the base and the cover body is provided between the turntable and the vacuum pumping assembly. It is characterized in that: A support frame is provided on the turntable. The cover body is connected to the support frame through a support arm. Longitudinal ends of the support arm respectively have hinge points, and the two hinge points are respectively hinged to the support frame and the cover body. An adjustable closing position tension adjusting member is provided between the support frame and the cover body; the base is hinged to the turntable through a hinge block. One end of the base close to the turntable has a linkage station. The support arm is linked to the linkage station of the base through a connecting rod. One end of the connecting rod extends between the two hinge points of the support arm and is hinged to the support arm, and the other end is at the linkage station and is hinged to the linkage station. The opening and closing cover driving mechanism includes a cam assembly arranged around the turntable, a linkage block linked to the cam assembly, and a push rod linked to the linkage block and capable of reciprocating displacement along the axial direction of the turntable. One end of the push rod is hinged to the linkage block, and the other end is hinged to the linkage station of the base. The cam assembly includes an arc-shaped body at the opening and closing cover station of the turntable. A cam track groove is provided on the outer peripheral surface of the arc-shaped body. The cam track groove includes an opening cover groove, a closing cover groove, and a connecting groove connecting the opening cover groove and the closing cover groove. The connecting groove is at the top of the outer peripheral surface of the arc-shaped body. The entry end of the opening cover groove is the lowest point of the cam track groove. The output end of the opening cover groove is communicated with the connecting groove. The entry end of the closing cover groove is communicated with the connecting groove. The output end of the closing cover groove is the lowest point of the cam track groove. A roller adapted to the cam track groove is provided on the linkage block.

2. The rotary vacuum pumping device for a food packaging equipment according to claim 1, wherein: The connecting rod is arranged in an arc shape. An articulated mounting seat is provided at the linkage station of the base. The connecting rod and the push rod are respectively hinged to the articulated mounting seat through an articulated shaft.

3. The rotary vacuum pumping device for a food packaging equipment according to claim 1 or 2, characterized in that: The hinge block includes a seat body fixedly connected to the turntable and an articulated lug connected to the seat body. The end surface of the seat body facing the outside of the turntable is an inclined surface that can abut against and limit the base.

4. The rotary vacuum pumping device for a food packaging equipment according to claim 1 or 2, characterized in that: The closing position tension adjusting member includes a connecting head respectively hinged to the cover body and the support frame, and a connecting rod connecting the two connecting heads and enabling the axial stroke between the two connecting heads to be adjustable.

5. The rotary vacuum extraction device of the food packaging equipment according to claim 1 or 2, characterized in that: The bag clamping mechanism is arranged on the base. The bag clamping mechanism includes a clamping claw that can be opened and closed in the base. A linkage member for urging the clamping claw to open and close is provided at the bottom of the base.

6. The rotary vacuum pumping device for a food packaging equipment according to claim 5, characterized in that: The bag clamping mechanism is arranged on the base. The bag clamping mechanism includes a clamping claw that can be opened and closed in the base. A linkage member for urging the clamping claw to open and close is provided at the bottom of the base.

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