Liquid vacuum clamping mechanism

Abstract

The utility model discloses a liquid vacuum material clamping mechanism which comprises a machine frame, a driving device and a pushing device. A front support and a rear support are arranged on the machine frame, a front gear and a driven material clamping roller are arranged on the front support, a rear gear and a driving material clamping roller are arranged on the rear support, and the front gear is connected with the rear gear in a meshed mode. The driving device is in transmission connection with the driving clamping roller, and the pushing device is connected with the rear support and drives the rear support to swing. The front support and the rear support which can swing are arranged on the machine frame, the front support and the rear support move at the same time through meshing of the front gear and the rear gear, the pushing device acts on the rear support, opening and closing between the driving clamping roller and the driven clamping roller are achieved after transmission, and passing packaging bags can be clamped. The driving device drives the driving material clamping roller to rotate, so that the packaging bag can be continuously conveyed when being clamped, air in the packaging bag is extruded out, meanwhile, a section of tight attaching area is formed, and the packaging machine conducts sealing operation in the tight attaching area of the packaging bag.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology, and more specifically, to a liquid vacuum clamping mechanism. Background Technology

[0002] A liquid packaging machine is an automated device specifically designed for packaging liquid products. These machines are widely used in the food, beverage, pharmaceutical, and chemical industries for quantitative filling and packaging of various types of liquids. Traditional liquid packaging machines typically lack a bag venting function. When sealing bags containing liquid, the bags often contain excessive gas. This excess gas increases the internal pressure, leading to difficulty in sealing or a weak seal. Furthermore, during transportation and storage, excessive gas makes the bags more prone to breakage when subjected to compression, impact, or other external forces. Utility Model Content

[0003] This utility model provides a liquid vacuum clamping mechanism to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: a liquid vacuum clamping mechanism for use in a packaging machine, including a frame, a drive device, and a pushing device; the frame is provided with a swingable front support and a rear support, the front support is provided with a front gear and a driven clamping roller, and the rear support is provided with a rear gear and a driven clamping roller, the front gear and the rear gear being meshed; the drive device is drivenly connected to the driven clamping roller, and the pushing device is connected to the rear support and drives the rear support to swing.

[0004] Preferably, the rear support includes a rear horizontal plate, a left side plate, and a right side plate, the left side plate and the right side plate being connected by the rear horizontal plate; a first rotating shaft is provided on the left side of the frame, and a second rotating shaft is provided on the right side; there are two rear gears, respectively located on the left side plate and the right side plate; the left side plate is rotatably connected to the first rotating shaft via the rear gears, and the right side plate is rotatably connected to the right side plate via the rear gears; the active clamping roller is located between the left side plate and the right side plate; a double-row sprocket is provided on the first rotating shaft, and a first chain is provided between the drive device and the double-row sprockets and connected through the first chain; a driven sprocket is provided on the left side plate, and the driven sprocket is connected to the active clamping roller; a second chain is provided between the double-row sprockets and the driven sprocket and is connected through the second chain drive.

[0005] Preferably, the driving device includes a motor, a reducer, a drive sprocket, and a first tensioning wheel. The motor is connected to the reducer, the drive sprocket is located at the output end of the reducer, the drive sprocket is connected to the double-row sprocket via the first chain, and the first tensioning wheel is located on the frame and connected to the first chain.

[0006] Preferably, the left side plate is provided with a second tensioning wheel, which is connected to the second chain.

[0007] Preferably, the front support includes a front cross plate and two front side plates, the two front side plates being connected by the front cross plate; front rotating shafts are respectively provided on both sides of the frame, and there are two front gears, which are rotatably mounted on the front rotating shafts on both sides of the frame; the two front side plates are respectively connected to the two front gears; the driven clamping roller is disposed between the two front side plates and is arranged parallel to the driven clamping roller.

[0008] Preferably, the front support is provided with a front auxiliary roller, the rear support is provided with a rear auxiliary roller, and the front auxiliary roller and the auxiliary roller are arranged opposite to each other.

[0009] Preferably, the rear cross plate is provided with a rotating seat, and the pushing device includes a cylinder seat and a pushing cylinder. The cylinder body of the pushing cylinder is rotatably connected to the cylinder seat, and the piston rod of the pushing cylinder is rotatably connected to the rotating seat. The cylinder seat is connected to the packaging machine.

[0010] Preferably, protective covers are provided on both sides of the frame.

[0011] Preferably, the frame is provided with a crossbar, the crossbar is provided with a clamping block, the clamping block is provided with a straight rod, the straight rod is perpendicular to the crossbar; the straight rod is provided with two strip-shaped grooves, and the strip-shaped grooves are provided with sensors for detecting materials.

[0012] Preferably, the sensor is a capacitive proximity switch.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model sets up a swingable front support and a rear support on the frame. The two supports move simultaneously through the meshing of the front and rear gears. The pushing device acts on the rear support, and after transmission, the opening and closing of the active clamping roller and the driven clamping roller are realized, which can clamp the passing packaging bag. The driving device drives the active clamping roller to rotate, so that the packaging bag can continue to be conveyed when it is clamped, and the air inside the packaging bag is squeezed out, forming a tight-fitting area. The packaging machine performs the sealing operation in the tight-fitting area of ​​the packaging bag. This utility model integrates the driving device, the pushing device, and the front and rear supports on the frame, with a compact overall structure, effectively saving the installation space of the packaging machine. The setting of the active clamping roller and the driven clamping roller clamps the packaging bag from both sides at the same time, which can provide a more uniform clamping force. The structure of the pushing device and the rear support opening and closing can flexibly adjust the size of the clamping opening according to different packaging materials and material characteristics, which is highly flexible. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the liquid vacuum clamping mechanism according to an embodiment of the present invention;

[0015] Figure 2 This is a structural diagram of the liquid vacuum clamping mechanism according to another perspective of an embodiment of the present invention;

[0016] Figure 3 This is a front view of the liquid vacuum clamping mechanism according to an embodiment of the present utility model;

[0017] Figure 4 This is a side view of the liquid vacuum clamping mechanism according to an embodiment of the present invention;

[0018] Figure 5 This is a top view of the liquid vacuum clamping mechanism according to an embodiment of the present invention;

[0019] Figure 6 This is a structural diagram showing the installation effect of the protective cover and the clamping state of the packaging bag of the liquid vacuum clamping mechanism according to an embodiment of the present invention.

[0020] exist Figures 1 to 6 In the diagram, the correspondence between the component names and the drawing numbers is as follows:

[0021] 1--Frame, 11--First rotating shaft, 12--Second rotating shaft, 13--Front rotating shaft, 14--Horizontal bar, 15--Clamping block, 16--Straight bar, 2--Drive device, 21--Double row sprocket, 22--First chain, 23--Driven sprocket, 24--Second chain, 25--Motor, 26--Reducer, 27--Drive sprocket, 28--First tensioner, 29--Second tensioner, 3--Pushing device, 31-- --Cylinder seat, 32--Push cylinder, 4--Front bracket, 41--Front gear, 42--Driven clamping roller, 43--Front cross plate, 44--Front side plate, 45--Front auxiliary roller, 5--Rear bracket, 51--Rear gear, 52--Active clamping roller, 53--Rear cross plate, 54--Left side plate, 55--Right side plate, 56--Rear auxiliary roller, 57--Rotating seat, 6--Protective cover, 7--Sensor, 8--Packaging bag. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Please refer to Figures 1 to 6 This utility model provides a liquid vacuum clamping mechanism for use in a packaging machine, including a frame 1, a drive device 2, and a push device 3; the frame 1 is provided with a swingable front support 4 and a rear support 5, the front support 4 is provided with a front gear 41 and a driven clamping roller 42, and the rear support 5 is provided with a rear gear 51 and a driven clamping roller 52, the front gear 41 and the rear gear 51 are meshed and connected; the drive device 2 is driven and connected to the driven clamping roller 52, and the push device 3 is connected to the rear support 5 and drives the rear support 5 to swing.

[0026] In this embodiment of the invention, the front support 4 and the rear support 5 are oscillatingly mounted on the frame 1. The two supports are linked by a front gear 41 and a rear gear 51. Specifically, the front support 4 is fixedly connected to the front gear 41, and the rear support 5 is fixedly connected to the rear gear 51. Therefore, when the rear support 5 oscillates on the frame 1, the rear support 5 acts on the rear gear 51, which meshes with the front gear 41. The front gear 41 then acts on the front support 4, thereby achieving synchronous movement between the two. Simultaneously, a driven clamping roller 42 and a driven clamping roller 52 are respectively mounted on the front support 4 and the rear support 5. When the pushing device 3 drives the rear support 5 to oscillate, the distance between the driven clamping roller 52 and the driven clamping roller 42 can be adjusted, allowing the driven clamping roller 52 to open or close.

[0027] To ensure the packaging bag 8 can continue to be conveyed forward while being clamped, this embodiment includes a drive device 2. This device is connected to and drives the active clamping roller 52 via a transmission structure. The driven clamping roller 42 also rotates synchronously under the friction of the packaging bag 8. While the two clamping rollers hold the packaging bag 8, it continues to be conveyed under the guidance of the traction device. During the movement of the packaging bag 8, the active clamping roller 52 and the driven clamping roller 42 clamp the packaging bag 8, squeezing out the air inside and preventing it from affecting the sealing operation. Simultaneously, when the packaging films on both sides of the packaging bag 8 are tightly adhered and the air is squeezed out, the gas content between the films is significantly reduced, and the air pressure decreases. Under external atmospheric pressure, the two films adhere tightly, forming a tightly sealed area on the packaging bag 8. When the end-sealing or horizontal-sealing mechanism of the packaging machine needs to seal, it only needs to perform heat sealing in this tightly sealed area, effectively preventing problems caused by bulging of the packaging bag 8 or liquid affecting the sealing when filled with liquid materials.

[0028] When filling liquid materials, excess liquid can be added into the packaging bag 8. The active clamping roller 52 and the driven clamping roller 42 clamp the packaging bag 8 and move it out of a tightly fitted area (e.g., Figure 4 The part that is tightly clamped by the active clamping roller 52 and the driven clamping roller 42 is sealed horizontally in the tightly fitted area.

[0029] Preferably, the rear support 5 includes a rear cross plate 53, a left side plate 54, and a right side plate 55, the left side plate 54 and the right side plate 55 being connected by the rear cross plate 53; the frame 1 has a first rotating shaft 11 on the left side and a second rotating shaft 12 on the right side; there are two rear gears 51, respectively located on the left side plate 54 and the right side plate 55; the left side plate 54 is rotatably connected to the first rotating shaft 11 via the rear gears 51, and the right side plate 55 is connected to the right side plate 55 via the rear gears 51. 55 is rotatably connected; the active clamping roller 52 is located between the left side plate 54 and the right side plate 55; a double-row sprocket 21 is provided on the first rotating shaft 11, and a first chain 22 is provided between the driving device 2 and the double-row sprocket 21 and connected through the first chain 22; a driven sprocket 23 is provided on the left side plate 54, and the driven sprocket 23 is connected to the active clamping roller 52; a second chain 24 is provided between the double-row sprocket 21 and the driven sprocket 23 and is connected through the second chain 24.

[0030] In this embodiment, the first rotating shaft 11 and the second rotating shaft 12 are respectively mounted on the frame 1. The double-row sprocket 21 and one of the rear gears 51 are rotatably mounted on the first rotating shaft 11 via bearings. The first rotating shaft 11 serves as a mounting and support mechanism. When the drive device 2 is started, its output end drives the double-row sprocket 21 to rotate via the first chain 22. The double-row sprocket 21 drives the driven sprocket 23 to rotate via the second chain 24. The driven sprocket 23 drives the active clamping roller 52 to rotate, thereby realizing the power transmission from the drive device 2 to the active clamping roller 52.

[0031] Preferably, the drive device 2 includes a motor 25, a reducer 26, a drive sprocket 27, and a first tensioner 28. The motor 25 is connected to the reducer 26. The drive sprocket 27 is located at the output end of the reducer 26. The drive sprocket 27 is connected to the double-row sprocket 21 via the first chain 22. The first tensioner 28 is mounted on the frame 1 and connected to the first chain 22. This embodiment uses a chain drive, where the drive sprocket 27 is connected to the double-row sprocket 21 via the first chain 22, and the double-row sprocket 21 is connected to the driven chain via the second chain 24. This drive method has high transmission efficiency, can stably transmit power over a long distance, and does not affect transmission during the swinging of the rear support 5. The first tensioner 28 is mounted on the frame 1 and connected to the first chain 22, allowing adjustment of the chain tension to maintain appropriate tension and ensure reliable and stable power transmission.

[0032] Preferably, the left side plate 54 is provided with a second tensioning wheel 29, which is connected to the second chain 24. The second tensioning wheel 29 can apply tension to the second chain 24 to prevent the chain from loosening or slipping during transmission.

[0033] Preferably, the front support 4 includes a front cross plate 43 and two front side plates 44, the two front side plates 44 being connected by the front cross plate 43; front rotating shafts 13 are respectively provided on both sides of the frame 1, and two front gears 41 are rotatably mounted on the front rotating shafts 13 on both sides of the frame 1; the two front side plates 44 are respectively connected to the two front gears 41; the driven clamping roller 42 is located between the two front side plates 44 and is arranged parallel to the driving clamping roller 52. In this embodiment, in order to improve the stability of the transmission, a rear gear 51 is provided on each of the left and right sides of the rear support 5, and correspondingly, two front gears 41 are also provided on the front support 4. The cooperation of the two sets of front and rear gears 51 can improve the stability of the swing between the front support 4 and the rear support 5.

[0034] Preferably, the front support 4 is provided with a front auxiliary roller 45, and the rear support 5 is provided with a rear auxiliary roller 56, with the front auxiliary roller 45 and the rear auxiliary roller being arranged opposite to each other. By setting the front auxiliary roller 45 and the rear auxiliary roller 56, the two auxiliary rollers act on both sides of the packaging bag 8 respectively. Before entering the active clamping roller 52 and the driven clamping roller 42, the packaging bag 8 passes through the two auxiliary rollers, which pre-shapes the packaging bag 8 and forms a cone-shaped structure at the bottom of the packaging bag 8, so as to guide the packaging bag 8 to smoothly enter between the active clamping roller 52 and the driven clamping roller 42, so that the active clamping roller 52 and the driven clamping roller 42 can better clamp the packaging bag 8.

[0035] Preferably, the rear cross plate 53 is provided with a rotating seat 57, and the pushing device 3 includes a cylinder seat 31 and a pushing cylinder 32. The cylinder body of the pushing cylinder 32 is rotatably connected to the cylinder seat 31, and the piston rod of the pushing cylinder 32 is rotatably connected to the rotating seat 57. The cylinder seat 31 is connected to the packaging machine. In this embodiment, the cylinder seat 31 is installed inside the packaging machine and connected to the packaging machine. Then, the pushing cylinder 32 is installed on the cylinder seat 31, and the piston rod is connected to the rotating seat 57 on the rear cross plate 53. The pushing cylinder 32 drives the rear support 5 to swing through the extension and retraction of the piston rod, which can quickly adjust the swing angle and position of the rear support 5, thereby conveniently changing the distance between the active clamping roller 52 and the driven clamping roller 42 to achieve clamping of the packaging bag 8.

[0036] Preferably, protective covers 6 are provided on both sides of the frame 1.

[0037] Preferably, the frame 1 is provided with a crossbar 14, a clamping block 15 is provided on the crossbar 14, and a straight rod 16 is provided on the clamping block 15. The straight rod 16 is perpendicular to the crossbar 14. The straight rod 16 is provided with two strip-shaped grooves, and a sensor 7 for detecting materials is provided on the strip-shaped grooves. Through the above structural arrangement, the two strip-shaped grooves on the straight rod 16 provide flexible position adjustment space for the installation of the sensor 7. According to different material detection requirements, such as the position, height, and width of the material to be detected, the position of the sensor 7 can be precisely adjusted along the strip-shaped grooves, so that the sensor 7 can accurately detect the material, improving the accuracy and adaptability of the detection. The straight rod 16 is mounted on the crossbar 14 through the clamping block 15. By adjusting the installation position of the clamping block 15, the position of the sensor 7 in the horizontal direction can be controlled to meet diverse production requirements.

[0038] Preferably, the sensor 7 is a capacitive proximity switch.

[0039] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model sets up a swingable front support and a rear support on the frame. The two supports move simultaneously through the meshing of the front and rear gears. The pushing device acts on the rear support, and after transmission, the opening and closing of the active clamping roller and the driven clamping roller are realized, which can clamp the passing packaging bag. The driving device drives the active clamping roller to rotate, so that the packaging bag can continue to be conveyed when it is clamped, and the air inside the packaging bag is squeezed out, forming a tight-fitting area. The packaging machine performs the sealing operation in the tight-fitting area of ​​the packaging bag. This utility model integrates the driving device, the pushing device, and the front and rear supports on the frame, with a compact overall structure, effectively saving the installation space of the packaging machine. The setting of the active clamping roller and the driven clamping roller clamps the packaging bag from both sides at the same time, which can provide a more uniform clamping force. The structure of the pushing device and the rear support opening and closing can flexibly adjust the size of the clamping opening according to different packaging materials and material characteristics, which is highly flexible.

[0040] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A liquid vacuum clamping mechanism for use in a packaging machine, characterized in that, It includes a frame (1), a drive device (2), and a push device (3); the frame is provided with a swingable front support (4) and a rear support (5), the front support is provided with a front gear (41) and a driven clamping roller (42), the rear support is provided with a rear gear (51) and a driven clamping roller (52), the front gear and the rear gear are meshed and connected; the drive device is connected to the driven clamping roller, and the push device is connected to the rear support and drives the rear support to swing.

2. The liquid vacuum clamping mechanism according to claim 1, characterized in that, The rear support includes a rear horizontal plate (53), a left side plate (54), and a right side plate (55). The left side plate and the right side plate are connected by the rear horizontal plate. A first rotating shaft (11) is provided on the left side of the frame, and a second rotating shaft (12) is provided on the right side. There are two rear gears, which are respectively provided on the left side plate and the right side plate. The left side plate is rotatably connected to the first rotating shaft through the rear gear, and the right side plate is rotatably connected to the right side plate through the rear gear. The active clamping roller is provided between the left side plate and the right side plate. A double-row sprocket (21) is provided on the first rotating shaft. A first chain (22) is provided between the drive device and the double-row sprocket and is connected through the first chain. A driven sprocket (23) is provided on the left side plate and is connected to the active clamping roller. A second chain (24) is provided between the double-row sprocket and the driven sprocket and is connected through the second chain.

3. The liquid vacuum clamping mechanism according to claim 2, characterized in that, The drive device includes a motor (25), a reducer (26), a drive sprocket (27), and a first tensioning wheel (28). The motor is connected to the reducer, the drive sprocket is located at the output end of the reducer, the drive sprocket is connected to the double-row sprocket via the first chain, and the first tensioning wheel is located on the frame and connected to the first chain.

4. The liquid vacuum clamping mechanism according to claim 3, characterized in that, The left side plate is provided with a second tensioning wheel (29), which is connected to the second chain.

5. The liquid vacuum clamping mechanism according to claim 2, characterized in that, The front support includes a front cross plate (43) and two front side plates (44), the two front side plates being connected by the front cross plate; front rotating shafts (13) are respectively provided on both sides of the frame, and there are two front gears, which are rotatably mounted on the front rotating shafts on both sides of the frame; the two front side plates are respectively connected to the two front gears; the driven clamping roller is located between the two front side plates and is arranged parallel to the active clamping roller.

6. The liquid vacuum clamping mechanism according to claim 5, characterized in that, The front support is provided with a front auxiliary roller (45), and the rear support is provided with a rear auxiliary roller (56). The front auxiliary roller and the auxiliary roller are arranged opposite to each other.

7. The liquid vacuum clamping mechanism according to claim 2, characterized in that, The rear horizontal plate is provided with a rotating seat (57), and the pushing device includes a cylinder seat (31) and a pushing cylinder (32). The cylinder body of the pushing cylinder is rotatably connected to the cylinder seat, and the piston rod of the pushing cylinder is rotatably connected to the rotating seat. The cylinder seat is connected to the packaging machine.

8. The liquid vacuum clamping mechanism according to claim 1, characterized in that, The frame is equipped with protective covers (6) on both sides.

9. The liquid vacuum clamping mechanism according to any one of claims 1 to 8, characterized in that, The frame is provided with a crossbar (14), the crossbar is provided with a clamping block (15), the clamping block is provided with a straight rod (16), the straight rod is perpendicular to the crossbar; the straight rod is provided with two strip-shaped grooves, and the strip-shaped grooves are provided with sensors (7) for detecting materials.

10. The liquid vacuum clamping mechanism according to claim 9, characterized in that, The sensor is a capacitive proximity switch.

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